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Journal articles on the topic 'Forming head'

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Author: Grafiati

Published: 30 May 2022

Last updated: 31 May 2022

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1

Xing, Jian, Yan-yan Cheng, and Zhuo Yi. "The Effect of Swinging Ball Heads with Different Arrangements in Multi-Point Stretch-Forming Process." Materials 12, no. 3 (January 22, 2019): 337. http://dx.doi.org/10.3390/ma12030337.

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To improve the effect of multi-point stretch forming of sheet metal, it is proposed in this paper to replace a fixed ball head with a swinging ball head. According to the multi-point dies with different arrangements, this research establishes finite element models of the following stretch forming, i.e., fixed ball heads with conventional arrangement, swinging ball heads with conventional arrangement, swinging ball heads with declining staggered arrangement, and swinging ball heads with parallel staggered arrangement, and then numerical simulation is performed. The simulation results show that by replacing a fixed ball head with a swinging ball head, the surface indentation of the part formed was effectively suppressed, the stress and tension strain distribution of the part formed was improved, and the forming quality was improved; the thickness of the elastic pad was reduced, the springback was reduced and the forming accuracy was improved; and when the ball head was applied to a multi-point die with staggered arrangement, a better forming result was achieved, where the best forming result was achieved in combining the swinging ball heads with the multi-point die with a parallel staggered arrangement. Forming experiments were carried out, and the experimental results were consistent with the trend of numerical simulation results, which verified the correctness of the numerical simulation.

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2

Tracy, Kim. "Forming a Bell-shaped head." IEEE Potentials 29, no. 4 (July 2010): 32–39. http://dx.doi.org/10.1109/mpot.2010.937645.

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3

Liu, Jian Guang, Feng Lei Liu, Hua Dong Liu, Yu Feng Wang, and Li Dong Wang. "The Heat Upsetting Process for the Titanium Alloy Spherical Bone Screws." Advanced Materials Research 1021 (August 2014): 15–19. http://dx.doi.org/10.4028/www.scientific.net/amr.1021.15.

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An advanced heat upsetting technology was studied according to the characteristics of the titanium alloy medical bone screws with spherical head. First, the reasons that punch demoulding is difficult during the upsetting forming have been discussed. Then the forming way with countersunk head in bottom and free forming on top was adopted, and the segmented upsetting die ranging in inner diameter was designed. Finally, the continuous heat upsetting process for medical bone screws was developed. The size, hardness and microstructure of the developed screws meet the standard requirements.

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4

Onozawa, Sho. "Liquid ejection head and image forming apparatus." Journal of the Acoustical Society of America 127, no. 4 (2010): 2704. http://dx.doi.org/10.1121/1.3396192.

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5

Jia, Xiang, Jian Sheng Liu, Hong Ping An, and Min Qin. "Forming Technology and Simulation of Large Head Forgings." Key Engineering Materials 831 (February 2020): 64–70. http://dx.doi.org/10.4028/www.scientific.net/kem.831.64.

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Head forging is an indispensable part of major technical equipment, which is required to produce high quality products because of its large volume and complex structure and long service under high temperature and high pressure. By means of DEFORM-3D numerical simulation and scaling experiment, the dynamic recrystallization dynamics model of SA508-3CL steel is established. Meanwhile, the head forming scheme is designed. The effects of different blank height-diameter ratio size, punch shape size and upper and lower die matching relationship on forging forming are emphatically analyzed. Finally, the reasonable head forming scheme is determined, and the 1:8 head forming scale test is carried out. The results show that the size of the head forging basically coincides with the design size and meets the load of the hydraulic press, which proves the rationality of the forming process of the head. The study provides a theoretical basis for the manufacture of the same type of large variable wall thickness head forgings.

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6

Tsuchie, Hiroyuki, Shin Yamada, Hiroshi Tazawa, Gota Ohi, Hidetomo Saito, Yoichi Shimada, Moto Kobayashi, and Takashi Minato. "Non-traumatic femoral head fracture forming bone fragments." Journal of Orthopaedic Science 19, no. 5 (September 2014): 843–46. http://dx.doi.org/10.1007/s00776-013-0386-1.

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7

Shih, Hung Ping, Michael K. Gross, and Chrissa Kioussi. "Muscle development: Forming the head and trunk muscles." Acta Histochemica 110, no. 2 (March 2008): 97–108. http://dx.doi.org/10.1016/j.acthis.2007.08.004.

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8

Yang, Li Quan, Qing Qing Lv, and Lei Zhao. "Research and Application of Warm Extrusion Forming Technology for Internal Combustion Engine Piston Head." Advanced Materials Research 706-708 (June 2013): 452–55. http://dx.doi.org/10.4028/www.scientific.net/amr.706-708.452.

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In order to improve the performance of the piston head on the existing conditions, and the warm extrusion forming technology was put forward based on the internal combustion engine piston head traditional production process. The warm extrusion process scheme and finite element boundary conditions was designed reasonable based on research the piston head forming process, the thermal-mechanical coupling model was established. The numerical simulation of the warm extrusion forming was carried out on the DEFORM software platform. The distributions of warm extrusion forming process strain field, stress field and temperature field were forecasted through the theoretical calculation and simulation. And the production equipment tonnage and die structure form were determined preliminarily. The possible problems of forming process were discussed, and the countermeasures were also put forward, provide the reliable reference for internal combustion engine piston head forming process improvement.

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9

Wendt, Thomas, Dianne Taylor, Terri Messier, Kathleen M. Trybus, and Kenneth A. Taylor. "Visualization of Head–Head Interactions in the Inhibited State of Smooth Muscle Myosin." Journal of Cell Biology 147, no. 7 (December 27, 1999): 1385–90. http://dx.doi.org/10.1083/jcb.147.7.1385.

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The structural basis for the phosphoryla- tion-dependent regulation of smooth muscle myosin ATPase activity was investigated by forming two- dimensional (2-D) crystalline arrays of expressed unphosphorylated and thiophosphorylated smooth muscle heavy meromyosin (HMM) on positively charged lipid monolayers. A comparison of averaged 2-D projections of both forms at 2.3-nm resolution reveals distinct structural differences. In the active, thiophosphorylated form, the two heads of HMM interact intermolecularly with adjacent molecules. In the unphosphorylated or inhibited state, intramolecular interactions position the actin-binding interface of one head onto the converter domain of the second head, thus providing a mechanism whereby the activity of both heads could be inhibited.

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10

Lv, Qing Qing, Li Quan Yang, Xiu Ting Lv, Lei Zhao, and Xi Kui Wang. "Numerical Simulation Optimization Research of Cold Extrusion Forming for Injection Head." Advanced Materials Research 706-708 (June 2013): 444–47. http://dx.doi.org/10.4028/www.scientific.net/amr.706-708.444.

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In order to obtain high-quality injection head, cold extrusion forming is adopted. Based on the study of forming technology for the injection head, reasonable process flow, cold extrusion pre-treatment process and boundary conditions are designed. Two finite element models in forward extrusion and backward extrusion forming ways are established. Taking DEFORM as the platform, the numerical simulation of forming process is carried out. Through simulation, the distribution of strain field, stress field and velocity field in the process of cold extrusion forming is preliminarily forecast, the merits and defects of two kinds of forming processes and the force state of mold are compared , the optimal forming scheme is determined.

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11

Ohashi, Takahiro, Hamed Mofidi Tabatabaei, and Tadashi Nishihara. "Fastenerless-Riveting Utilizing Friction Stir Forming for Dissimilar Materials Joining." Key Engineering Materials 751 (August 2017): 186–91. http://dx.doi.org/10.4028/www.scientific.net/kem.751.186.

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This paper proposes a new joining approach for dissimilar materials, called ‘the fastenerless-riveting,’ employing the friction stir forming (FSF). The FSF is a friction stir process invented by Nishihara in 2002. In FSF, a substrate material was put on a die firstly. Next, friction stirring was conducted on the back surface of the material. The material then deformed and precisely filled the cavity of the die due to high pressure and heat caused by the friction stirring. The authors utilized the FSF approach to generate rivet like joints as followings. First, a substrate which is capable for friction stirring, i.e. an aluminum alloy plate, was put on a dissimilar material plate having holes, i.e. a steel plate. The authors call the former ‘the host member,’ the latter ‘a joined member.’ These members were put on a die having the cavity to fabricate the head of the rivet-like structure. Then FSF was conducted to form the stems and heads of the structure. Joint members are able to be stacked within the forming limit. In the study, the authors firstly conducted the proof of the concept (PoC) tests to generate rivet-like structure between steel and aluminum alloy plate and between CFRP and aluminum alloy plate, then investigated the forming conditions, i.e. tool feed rate, tool pass and the corresponding results, including the volume of the generated stem and head of the individual rivet-like structure. 3mm-thick A5083P-O aluminum alloy plates was utilized as the host member, and a 0.7mm-thick SPCE steel plate and a 0.8mm-thick CFRP plate as the joined members.

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12

Nayyef Farhan, Entesar. "EFFECT OF FORMING TOOLS NOSE ON THE FORMABILITY OF SINGLE POINT INCREMENTAL SHEET FORMING." IRAQI JOURNAL FOR MECHANICAL AND MATERIALS ENGINEERING 21, no. 1 (April 3, 2021): 1–14. http://dx.doi.org/10.32852/iqjfmme.v21i1.534.

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In this paper the FE simulation and experimental equipment and design of the system for deformation by single point incremental sheet metal forming are presented. The formability is executed at room temperature and needs the milling machine, the tool of hemispherical head and toroidal head applied to deform the sheet, whereas translates from the peripheral of the sheet to its focus that additionally driving the sheet down. The blank is distorted increment by increment into the required shape via hemispherical or toroidal nose instrument going along a circular way. In the present investigation, the deformation’s analyses were down on the aluminum 7075 compound with thickness (0.9mm) and various device nose are enormously impact on the contact region and its observed that the hemispherical apparatus gives the best outcome. Close to this investigation consequence of the impact of shaping instrument nose on the formability is displayed. The ANSYS results are comparison with results obtained experimentally and it's discovered the deviation about 8% and this is expected to the criteria of spring-back.

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13

Cai, Gai Pin, Cong Wen Xing, Zhi Hong Jiang, and Zhong Kai Zhang. "Sheet Single Point Vibration Incremental Forming Process Simulation and Analysis of Process Parameters." Advanced Materials Research 430-432 (January 2012): 74–78. http://dx.doi.org/10.4028/www.scientific.net/amr.430-432.74.

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The deformation of vibration incremental forming process for sheet metal is in high complexity, theory research is not perfect. This subject using DEFORM simulation software, joined the vibration on the forming process of tool head and simulated the forming process base on different tool radius and vibration parameters. Simulation result indicated that vibration in greatly reduced the stress of the forming tool head. The right vibration parameters smoothed out the forming force largely, reduced sheet metal stress concentration, improved product quality and product yield. That has a higher degree of study and use value.

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14

Bartnicki, J., and J. Tomczak. "Numerical Analysis of the Forming Process of Head Toothing in Rolling Extrusion on a Shaft from Aluminum Alloy 7075 / Analiza Numeryczna Kształtowania Uzębienia Czołowego W Procesie Przepychania Obrotowego Na Wałku Ze Stopu Aluminium 7075." Archives of Metallurgy and Materials 60, no. 4 (December 1, 2015): 2739–42. http://dx.doi.org/10.1515/amm-2015-0441.

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This paper presents the forming method of head toothing with the application of rolling extrusion technology. Tools numerical models were used in numerical calculations. The presented numerical results concern metals flow kinematics, distributions of stresses and strains. Determined in the process technological parameters of head toothing forming allow foreseeing real material flow in the experiment planned for conducting.

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15

Wang, Ke, Zhe Ying Wang, and Xing Wei Sun. "Elastic-Plastic Finite Element Simulation of Bulge Forming Process Using a Variable Cross-Section Solid Bulging Mold." Advanced Materials Research 189-193 (February 2011): 4405–8. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.4405.

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Bulge forming is a novel process aimed at common products including T-branches, cross branches and angle branches. But bulging forming has not applied for two-head abnormity-shaped hollow screw rotor reported in literature. Simulation of the bulging forming of two-head abnormity-shaped hollow screw rotor has not been reported. This paper presents a simulation of the bulge forming process of two-head abnormity-shaped hollow screw rotor using a variable cross-section solid bulging mold. Some conditions including the effect of friction, boundary conditions, contact conditions and the space motion, etc are presented. The mathematical model of three-dimensional finite element analysis has been established. The distribution of generalized plastic strain and general metal flow mode in cross section of two abnormity-shaped hollow screw rotor has been analyzed. It is an effective method for the analysis of other defects and the optimization of process parameters further.

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16

Suardi, Khairmen, and Faris Fadli. "Analisis Kegagalan Pembentukan Ellipsoidal Head Pressure Vessel dari Dua Pelat Dilas ASME SA516 Grade 70N dengan menggunakan Metode Fabrikasi Cold Forming." Metal Indonesia 43, no. 1 (June 30, 2021): 48. http://dx.doi.org/10.32423/jmi.2021.v43.48-54.

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AbstrakHead pada pressure vessel yang berbentuk melengkung, seperti: hemispherical, torispherical, dan ellipsoidal dapat dibuat dari pelat dengan lebar 2.5 m yang mengalami proses metal forming. Namun, pelat yang tersedia di pasaran pada umumnya memiliki lebar 1,6 m. Kondisi ini menjadi batasan apabila ingin menggunakan satu material pelat secara integral sehingga dibutuhkan pelat untuk membuat head dengan lebar yang lebih besar. Oleh karena itu, untuk membuat head dengan lebar 2,5 m dilakukan proses cold forming pada dua pelat yang dilas. Namun setelah proses dilakukan, terjadi kegagalan berupa timbulnya retakan di sekitar area las. Pada paper ini akan dibahas analisis kegagalan proses cold forming yang terjadi pada dua pelat ASME SA516 grade 70N yang digunakan sebagai base metal. Untuk menganalisis penyebab kegagalan, maka dilakukan pengujian kekerasan, tarik, metalografi, dan komposisi kimia. Selain itu juga dilakukan perhitungan untuk mengetahui nilai crack consists of hot (UCS), cold cracking (Pcm), dan carbon equivalent (CE). Hasil perhitungan menunjukkan bahwa material tersebut memiliki nilai UCS di bawah 30, nilai Pcm berada di antara 0,23-0,35%, serta berada di zona II pada diagram Graville dimana nilai tersebut menunjukkan bahwa material memiliki kemampulasan yang baik. Sementara dari hasil pengujian mekanis didapatkan nilai kekerasan dan kekuatan tarik yang lebih besar dari standar, yaitu masing-masing sebesar 300 HBW dan 621 Mpa dengan nilai elongasi yang masih tinggi, yaitu sebesar 21,8%. Hasil pengamatan metalografi menunjukkan terbentuk fase martensit namun dalam jumlah yang sedikit pada area heat affected zone (HAZ) dengan bentuk butir seperti jarum. Fase martensit ini berperan sebagai stress concentration yang menjadi titik awal retak ketika proses cold forming dilakukan. Terbentuknya fasa martensit ini disebabkan oleh proses preheat yang tidak sesuai serta heat input yang terlalu besar. Abstract The head on a pressure vessel with curved shapes such as hemispherical, torispherical, and ellipsoidal is derived from the formed plate. Generally the plates available in the market have a width of 1.6 m, this condition becomes a limitation if you want to use one plate material integrally so that a plate is needed to make a head with a larger width. Therefore, to make a head with a width of 2.5 m, a cold forming process is carried out on two welded plates. However, after the process is carried out, failure occurs in the form of cracks around the weld area. In this paper, we will discuss the failure analysis of the cold forming process that occurred on two ASME SA516 grade 70N plates used as base metal. In order to analyze the causes of failure, hardness, tensile, metallographic, and chemical composition tests were carried out. In addition, calculations were also carried out to determine the value of crack consists of hot (UCS), cold cracking (Pcm), and carbon equivalent (CE). From the calculation results it is evident that the material has a UCS value below 30, the PCm value is between 0.23-0.35%, and is in zone II on the Graville diagram where this value indicates that the material has good weldability. Meanwhile, from the results of mechanical testing, the hardness and tensile strength values are greater than the standard, which are 300 HBW and 621 Mpa, respectively, with a high elongation value, which is 21.8%. The results of metallographic observations showed that the martensite phase was formed but in small amounts in the heat affected zone (HAZ) area with needle-like grain shapes. This martensite phase acts as a stress concentration which is the starting point for cracks when the cold forming process is carried out. The formation of the martensite phase is caused by an inappropriate preheat process and the heat input is too large.

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17

Zhou, Jing, Guo Lin Duan, Dong Bin Zhu, and Jin Cai. "The Application of Micro-Flow Extrusion Forming Technology in the Denture Preparation." Key Engineering Materials 645-646 (May 2015): 1351–56. http://dx.doi.org/10.4028/www.scientific.net/kem.645-646.1351.

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The forming process of denture preparation based micro-flow extrusion was researched. The dental ceramic materials having health care function was preparation. Through analysis and calculation, the rheological properties of the ceramic slurry confirmed to be pseudo-plastic fluid . The extrusion head as a key part was designed. The pressure distribution and velocity distribution of the internal flow field of extrusion head were simulated by using START-CD software ,the analysis result can used to guide the optimal design of extrusion head.

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18

D browska, K., P. Miernikiewicz, A. Piotrowicz, K. Hodyra, B. Owczarek, D. Lecion, Z. Ka mierczak, A. Letarov, and A. Gorski. "Immunogenicity Studies of Proteins Forming the T4 Phage Head Surface." Journal of Virology 88, no. 21 (August 20, 2014): 12551–57. http://dx.doi.org/10.1128/jvi.02043-14.

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19

Gontarz, A., Z. Pater, and W. Weroñski. "Head forging aspects of new forming process of screw spike." Journal of Materials Processing Technology 153-154 (November 2004): 736–40. http://dx.doi.org/10.1016/j.jmatprotec.2004.04.164.

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20

Inwards, Carrie Y. "Update on Cartilage Forming Tumors of the Head and Neck." Head and Neck Pathology 1, no. 1 (September 2007): 67–74. http://dx.doi.org/10.1007/s12105-007-0015-4.

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21

Nielsen, G. Petur, and Andrew E. Rosenberg. "Update on Bone Forming Tumors of the Head and Neck." Head and Neck Pathology 1, no. 1 (September 2007): 87–93. http://dx.doi.org/10.1007/s12105-007-0023-4.

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22

Bugenhagen, Bernhard, Nuha Al Soom, Yosef Al Jasem, and Thies Thiemann. "Crystal structure of (1Z,2E)-cinnamaldehyde oxime." Acta Crystallographica Section E Crystallographic Communications 71, no. 12 (December 1, 2015): o1063—o1064. http://dx.doi.org/10.1107/s2056989015023853.

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The title compound, C9H9NO, crystallized with two independent molecules (AandB) in the asymmetric unit. The conformation of the two molecules differs slightly with the phenyl ring in moleculeA, forming a dihedral angle of 15.38 (12)° with the oxime group (O—N=C), compared to the corresponding angle of 26.29 (11)° in moleculeB. In the crystal, theAandBmolecules are linked head-to-head by O—H...N hydrogen bonds, forming –A–B–A–B– zigzag chains along [010]. Within the chains and between neighbouring chains there are C—H...π interactions present, forming a three-dimensional structure.

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23

Maryin, Dmitry, Andrei Glushchenko, Anton Khokhlov, Evgeny Proshkin, and Rail Mustyakimov. "Results of engine tests of an experimental gasoline internal combustion engine." BIO Web of Conferences 17 (2020): 00078. http://dx.doi.org/10.1051/bioconf/20201700078.

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To improve the power and fuel and economic performance of a gasoline internal combustion engine, it has been proposed to improve the insulating properties of the piston by forming a heat-insulating coating on the working surfaces of the piston head with a thickness of 25...30 μm using the microarc oxidation method. Comparative results of engine tests are carried out, which showed that an engine equipped with pistons with a heat-insulating coating on the working surfaces of the head increases power by 5.3 % and reduces hourly fuel consumption by 5.7 % compared to an engine equipped with standard pistons.

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24

Su, Shao Juan, Yong Hu, Cheng Fang Wang, and Bo Liu. "Square Head Adjustable Die Device Research on Ship 3D CNC Forming Machine." Applied Mechanics and Materials 395-396 (September 2013): 920–24. http://dx.doi.org/10.4028/www.scientific.net/amm.395-396.920.

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Research device structure upon suppressing impress and wrinkling about three-dimensional numerical control bending machine.3D ship curved-surface outside plate automatic forming process is always the difficult part in the field of domestic and international shipbuilding. Analyzing the problems in existing processing methods ,for example, line heating technology has the defects of poor production conditions, large labor intensity, not environmental friendly and cold bending forming method may result in indentation, wrinkling or rebound phenomenon.Presents the forming process of a ship hull plate based on square head adjustable die curved surface forming device. By setting the non pressure and a plurality of planar head to replace the traditional integral die method, the paper will illustrate the composition and working principles of the process at the same time try to implement effective control of indentation and wrinkle phenomenon followed by verification through experiments.

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25

Oikonomou, Despina, and Artemis Alexiadou. "Voice Syncretism Crosslinguistically: The View from Minimalism." Philosophies 7, no. 1 (February 16, 2022): 19. http://dx.doi.org/10.3390/philosophies7010019.

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Voice syncretism is widely attested crosslinguistically. In this paper, we discuss three different types of Voice syncretism, under which the same morpheme participates in different configurations. We provide an approach under which the same Voice head can convey different interpretations depending on the environment it appears in, thus building on the notion of allosemy. We show that, in all cases under investigation, allosemy is closely associated with the existence of idiosyncratic patterns. By contrast, we notice that allosemy and idiosyncrasy are not present in analytic passive and causative constructions across different languages. We argue that the distinguishing feature between the two types of constructions is whether the passive and the causative interpretation comes from the Voice head, thus forming a single domain with the vP or whether passive and causative semantics are realized by distinct heads above the Voice layer, thus forming two distinct domains.

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26

Popychenko, Svitlana. "TECHNOLOGIES OF FORMING A POSITIVE IMAGE OF A PRESCHOOL INSTITUTION AND ITS HEAD IN THE CONDITIONS OF OBJECTIVE CHANGE." Psychological and Pedagogical Problems of Modern School, no. 1(5) (May 27, 2021): 102–10. http://dx.doi.org/10.31499/2706-6258.1(5).2021.235203.

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The article actualizes the problem of forming a positive image of a preschool institution and its head in the conditions of objective changes caused by the modernization of this educational system part. The analysis of approaches has been carried out to define the notion of the image and its influence on the competitiveness of the institution has been substantiated. It is important to refer to the Basic Component of Preschool Education (New Edition), that proclaims the education of a child to be a starting platform for personal development, the first and mandatory step in the continuing educational system. The article reveals the notion of the image of a preschool educational institution. It is aimed at studying the components of the image and evaluating their impact on the effectiveness of the institution functioning. The indicators that characterize the state of the corporate image of a preschool educational institution are determined. The factors that affect the image of the institution are analyzed. The author outlines the personal image peculiarities of the head of the institution. She identifies some business, professional and personal qualities that contribute to the formation of his or her positive image. Technologies of forming a positive image of both a preschool educational institution and its head are proposed. Special attention is paid to the technologies of forming an internal image of a preschool educational institution, such as forming a creative team to give educational services; improving pedagogical skills and the culture of personnel; establishing the optimum interpersonal relations within the staff, etc. The author analyses the technologies of establishing an external image of the institution as well, e.g.: improving the interaction between an institution and administrative bodies, public, childrenʼs families; participating in presentations, exhibitions of educational services; advertising. The article presents the technology of forming a positive image of the head, covering two stages: primary ‒ self-presentation through externally expressed features and secondary ‒ forming an image within activities and interpersonal interaction. It has been concluded that only a head, capable of applying progressive approaches, innovation, creativity, professional and personal self-realization can ensure a highly-qualified image and modernization of the institution headed by him. Keywords: image, the image of a preschool educational institution, Basic Component of Preschool Education, the image of a head, components of the image, peculiarities of the personal image, indicators of the corporate image, technologies of forming a positive image.

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27

Боева, Ольга, Ol'ga Boeva, Татьяна Мальцева, Tatyana Maltseva, Дагвадорж Нямтулга, and Dagvadorzh Nyamtulga. "Pedagogical culture of the head of the body of internal affairs Mongolia and the ways of its formation." Applied psychology and pedagogy 4, no. 2 (June 28, 2019): 124–40. http://dx.doi.org/10.12737/article_5d15080a7a6550.80966189.

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The object of the study, which formed the basis of the article, is the pedagogical culture of the head of the internal affairs agencies, while the subject is the ways of forming the pedagogical culture of the head of the internal affairs agencies. As the goal of the study, the authors see the definition of ways to effectively form a pedagogical culture of heads of internal affairs forces. The research method was the following: the method of expert assessments and the analysis of the results of the pedagogical activity of the heads of the internal affairs forces of Mongolia. The sphere of the general culture of a leader, as a citizen of his country and a person, contains his spiritual and material values. In addition, it is possible to include in this area also methods for the implementation of pedagogical activities that are necessary for society to socialize the individual and ensure the historical process of generational change. That is, the essence of the pedagogical culture of the head of the internal affairs forces is somewhat wider than the sphere of educational activities. Accordingly, during the process of forming the pedagogical culture of the head of the internal affairs forces, a new level of its general culture is being formed, such universal human qualities as spirituality, mercy, a sense of social justice, respect for human dignity, conscience, etc. are being formed. The research results are aimed at improving the efficiency of the existing pedagogical system and activates the process of improving the formation of pedagogical culture among the heads of the internal affairs forces of Mongolia.

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28

Zhu, Xia, Hiromichi Toyota, Hironori Hagio, Shigekiyo Ishikawa, and Takahiro Akutagawa. "Effect of Frictional Conditions in Deep Drawing on Formability." Key Engineering Materials 904 (November 22, 2021): 26–30. http://dx.doi.org/10.4028/www.scientific.net/kem.904.26.

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This study investigated the stress and strain behavior caused in the forming process via simulation analysis using the finite element method, for suppressing punch shoulder and head plate thickness reduction die shoulder stress concentration by controlling the friction conditions. The following findings were obtained: The thickness of the blank head and punch shoulder decreased with the forming process. Due to the increase in the coefficient of friction with the punch side, the plate thickness reduction ratio decreases, and is the lowest when it is close to non-lubrication; Stress concentration occurs at the die shoulder with forming processing. With the increase in the friction coefficient value, forming limit parameter (FLP) increases slightly, but as it does not reach the limit value of 1, the forming process can be safely performed without mechanical damage; When the formability is comprehensively evaluated using the plate thickness reduction ratio and FLP, the friction coefficient μ = 0.4 to 0.5 is reasonable.

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29

Боева, Ольга, Ol'ga Boeva, Татьяна Мальцева, Tatyana Maltseva, Еруултэгш Чимэддорж, and Eruultags Chimeddorzh. "Theoretical and applied principles of the process of forming professional and pedagogical competence of the head of the internal affairs bodies of the Russian Federation." Applied psychology and pedagogy 4, no. 3 (September 28, 2019): 32–43. http://dx.doi.org/10.12737/article_5d8f9003e70c46.29208756.

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For the effective management of law enforcement, the identification and assessment of the general level of professionally pedagogical competence of the head of the internal affairs bodies of the Russian Federation is relevant in both theoretical and practical aspects. The object of the research is the process of forming of professionally pedagogical competence of the head of the internal affairs bodies of the Russian Federation. The subject of the study is the professional and pedagogical competence of the leader. The purpose of the work is to study the professional and pedagogical competence of the head of the internal affairs bodies of the Russian Federation and develop recommendations for its optimization. The study used methods of theoretical analysis and generalization of pedagogical and psychological ideas, observation, conversation, questioning. The theoretical significance of the study lies in the scientific substantiation of the process of forming professional and pedagogical competence of the head of the internal affairs bodies of the Russian Federation. The practical significance of the study lies in the development of practical recommendations for optimizing the content, organization and methodology of improving professionally pedagogical competence of heads of internal affairs bodies of the Russian Federation, as well as activating the process of self-improvement of a leader to increase professionally pedagogical competence. The study showed that the development of personal and professional qualities; the formation of a constructive model of interaction with colleagues and subordinates; prevention and elimination of negative situations in the service teams will contribute to the improvement of the activities of heads of ATS.

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Thara, Somkid, Kusol Prommul, Bhadpiroon Sresomroeng, and Jiraporn Sripraserd. "Finite Element Method for Step Reduction in Forming Socket Head Screws." Advanced Materials Research 622-623 (December 2012): 107–11. http://dx.doi.org/10.4028/www.scientific.net/amr.622-623.107.

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Nowadays, step reduction in the manufacturing process is an important issue because it reduces both the cost and time. The objective of this research is to reduce the steps used in the cold forging process of a socket head screw from 3 steps (existing design) to 2 steps (new design). The commercial FEM (Finite Element Method) software was used for simulating the values of flow line, forging force and die stress, which were then used to determine part quality and tool life. The results have shown that the simulated values of 2-step design are similar to 3-step design.

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31

Huang, Xia, Yuan Song Zeng, B. Jiang, and X. Q. Han. "FEM Analysis of Superplastic Forming Process for an Oval Head Shell." Materials Science Forum 551-552 (July 2007): 275–80. http://dx.doi.org/10.4028/www.scientific.net/msf.551-552.275.

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Pragana, João PM, Tomás RM Contreiras, Ivo MF Bragança, Carlos MA Silva, Luis M. Alves, and Paulo AF Martins. "Joining by forming of metal–polymer sandwich composite panels." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 233, no. 10 (November 23, 2018): 2089–98. http://dx.doi.org/10.1177/0954405418815386.

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This article presents new joining-by-forming processes to assemble longitudinally two metal–polymer sandwich composite panels perpendicular to one another. Process design draws from an earlier development of the authors for metal sheets to new concepts based on the combination of sheet-bulk forming with mortise-and-tenon joints. Selected examples obtained from experimentation and finite element modelling give support to the presentation. A new three-stage joining by the forming process is capable of producing mechanically locked joints with larger and stiffer flat-shaped heads than those fabricated by alternative single- or two-stage solutions. Failure in the new three-stage joining by the forming process is found to take place by cracking instead of disassembling after unbending the flat-shaped head of the joint back to its original shape. The required forming forces to produce the new metal–polymer joints are below 15 kN, allowing them to be an effective, easy-to-implement alternative to existing solutions based on adhesive bonding, welding and mechanical fastening.

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Liu, Zhixiang, Shuai Wang, Miao Xie, and Chunxue Xie. "Analysis of the Outer Contour Characteristics of Roadway Forming under the Influence of Cutting Head Vibration." Shock and Vibration 2021 (May 24, 2021): 1–12. http://dx.doi.org/10.1155/2021/6667523.

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Considering that the trajectory of the cutting head of the longitudinal axis roadheader directly affects the surface morphology of the roadway, the formation mechanism of the outer profile of the roadway obtained by the cutting head is analyzed, and the dynamic model of the cutting part was constructed. The variation law of the vibration swing angle of the cutting head under different working conditions was obtained, and the coordinate of the cutting head of the roadheader in the roadway space coordinate system was determined by using the robot kinematics analysis method. The mathematical model of cutting the outer outline of the roadway by the cutting head is constructed. Through the numerical calculation and analysis, the characteristics of the formed outer profile of the roadway were analyzed considering the influence of the vibration of the cutting head. The results show that the difference between the “pit” and the “peak ridge” obtained by considering the vibration of the cutting head is larger than that without considering the vibration of the cutting head, which shows that the outer outline of the roadway obtained by the real cutting is more rougher than that without considering the vibration of the cutting head. With the increase of the cutting lifting angle, the maximum and average value of the difference between the “pit” and the uplift “peak ridge” on the coal and rock shows an increasing trend, and with the increase of the cylinder pressure, the maximum values of the horizontal swing angle “pit” and the uplift “peak ridge” gradually increase. The vibration of the cutting head when cutting coal and rock will have a great influence on the outer profile of the roadway, which cannot be ignored in the research of accurate autonomous cutting control algorithm of roadheader. The research results of this paper can provide a basis for the optimization of cutting parameters and high-precision forming control method of roadheader.

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Vos, Jan C., Eric A. J. Reits, Eldine Wojcik-Jacobs, and Jacques Neefjes. "Head–head/tail–tail relative orientation of the pore-forming domains of the heterodimeric ABC transporter TAP." Current Biology 10, no. 1 (January 2000): 1–7. http://dx.doi.org/10.1016/s0960-9822(99)00257-2.

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Kuswanti, Ana, Amiruddin Saleh, Aida Vitayala S Hubeis, Herien Puspitawati, and Munadhil Abdul Muqsith. "Effect of Group Participative Communication and Economic Empowerment of Independent Women." Journal of Social Sciences Research, no. 63 (March 15, 2020): 293–99. http://dx.doi.org/10.32861/jssr.63.293.299.

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The study aims to analyze the effect of participatory group communication and the economic empowerment of female household towards economic independence. The female head of a family in the city of Batang, central Java, Indonesia has a condition of economic limitations. Therefore, the Pekka group paid attention to women heads of households to be empowered. The respondents were 229 female heads of household, consisting of nine single, married 150, widowed 70 Pekka. The research found a real influence between participatory communication between groups and economic empowerment on Pekka’s economic independence. The results show that the direction of problem-solving communication has the most contribution in forming participatory communication groups, and access to capital has the most contribution in forming economic empowerment in realizing Pekka’s economic independence.

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36

Hos, Rabia, Halil Ibrahim Cinarbas, and Hatice Yagci. "A Head-Start to Teaching." International Journal of Teacher Education and Professional Development 2, no. 2 (July 2019): 68–84. http://dx.doi.org/10.4018/ijtepd.2019070105.

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This study explored the experiences of pre-service English as a foreign language (EFL) teachers, cooperating teachers, and university collaborators in a structured early field experience course. Qualitative methodology including data sources of interviews, observations, focus groups, audio and video recordings were used. The results of the study indicated that the exposure of pre-service teachers into real school contexts provided them with the necessary foundations of becoming reflective practitioners. The benefits of the structured early field experiences outweighed the challenges. Early field experiences are critical in forming the pre-service teacher beliefs and philosophies of pre-service teachers, so they should be designed carefully to meet their needs.

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Chen, Dyi-Cheng, and Jheng-Guang Lin. "STUDY OF HOLLOW STEMMED HIP BONE FORMING." Transactions of the Canadian Society for Mechanical Engineering 41, no. 4 (November 2017): 531–42. http://dx.doi.org/10.1139/tcsme-2017-1037.

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This study investigated hollow stemmed hip forging for enhancing the biocompatibility of Ti-6AL-4V titanium alloys. Instead of using the expensive titanium billet, this study applied DEFORMTM 3D finite element analysis software to simulate and analyze stem forming with respect to different die temperatures, friction factors, punch types, forging velocities, and billet temperatures. On the basis of its shape, a punch can be classified as flat head, ladder shaped, spherical, and conical. These differences affect the effective stress and punch load after stem formation. The experiment parameters were determined using the Taguchi L16 (45) orthogonal table. Both the simulated and experimental results indicated that the error for the size of the bone stem was less than 2%.

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Luo, Jun Ting, Yan Xu, and Shuang Jing Zhao. "Cold Extrusion Forming of Copper/Aluminum Clad Composite." Applied Mechanics and Materials 16-19 (October 2009): 441–44. http://dx.doi.org/10.4028/www.scientific.net/amm.16-19.441.

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The cold extrusion forming of copper/aluminum clad composite based on the low pressure casting billet is presented in this paper. The technology was studied by using the experimental investigation and the finite element method. The drop-in phenomenon occurred in aluminum during the extrusion forming process. The product will be having good quality when the extrusion ratio is 5.45 and the extrusion modular angle is 30°. The crack appeared on the head of product when the extrusion ratio and extrusion angle is large than the aforementioned values.

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Liu, Jin Song, and Xin Peng Wang. "Research in Optimization of Inner-Grooved Copper Tubes Forming." Advanced Materials Research 641-642 (January 2013): 591–94. http://dx.doi.org/10.4028/www.scientific.net/amr.641-642.591.

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By using the method of orthogonal design based on the inner-grooved copper tubes (φ7.00×0.24), the influence in the different forming conditions was analyzed. The forming laws and optimization forming process parameters were also obtained during the experiment. The results show that the motor and drawing speed should be controlled about 23000r/min and 15m/min respectively, and the spinning position should be located at about 1.5mm away from the center of the inner-grooved core head.

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40

Petersen, W. J., J. M. Lankes, F. Paulsen, and J. Hassenpflug. "The Arterial Supply of the Lesser Metatarsal Heads: A Vascular Injection Study in Human Cadavers." Foot & Ankle International 23, no. 6 (June 2002): 491–95. http://dx.doi.org/10.1177/107110070202300604.

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The possibility of avascular changes of the metatarsal heads following forefoot surgery has been previously documented. The aim of this study was to investigate the arterial supply of the lesser metatarsal heads with regard to osteotomies of these bones. We used epoxy resin injections and a modified Spalteholz technique in human cadaveric specimens to demonstrate the intraosseous and extraosseous blood supply of the lesser metatarsals. The metatarsal heads had two arterial sources: The dorsal metatarsal arteries, which arose from the dorsalis pedis artery, and The plantar metatarsal arteries, which are branches of the posterior tibial artery. These two vessels typically anastomosed at two sites about the metatarsal heads, forming a vascular ring and provided an extensive extraosseous arterial network around the metatarsal heads. Small arterial branches of this network run distally on the metatarsal cortex to enter the bone of the metatarsal head. The nutrient arteries traversed the cortex of the metaphysis close to the capsular and ligamentous insertions to provide multiple branches for the supply of the subchondral bone. Extensive capsular stripping during metatarsal head osteotomies results in damage to the medial and lateral head vessels.

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YOSHIMURA, Tatsuya, Takamitsu HATAKEYAMA, Takumi USUI, Yutaka OKAMIYA, Takeshi NISHIZAWA, Masayoshi TAMURA, Yoshimasa TAKAHASHI, and Yuichi CHIDA. "Height and Angle Control of an Automatic Harvester for Head Forming Vegetables." Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) 2016 (2016): 2A1–08b5. http://dx.doi.org/10.1299/jsmermd.2016.2a1-08b5.

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Tirado, Marcus, and Nicolas C. Polfer. "Defying Entropy: Forming Large Head-to-Tail Macrocycles in the Gas Phase." Angewandte Chemie 124, no. 26 (May 22, 2012): 6542–44. http://dx.doi.org/10.1002/ange.201202405.

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43

Tirado, Marcus, and Nicolas C. Polfer. "Defying Entropy: Forming Large Head-to-Tail Macrocycles in the Gas Phase." Angewandte Chemie International Edition 51, no. 26 (May 22, 2012): 6436–38. http://dx.doi.org/10.1002/anie.201202405.

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44

Qian, Z. R., M. Z. Li, and F. X. Tan. "The analyse on the process of multi-point forming for dish head." Journal of Materials Processing Technology 187-188 (June 2007): 471–75. http://dx.doi.org/10.1016/j.jmatprotec.2006.11.132.

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45

Wang, Xian Rui, Hu Zhu, and Dong Won Jung. "Influence of the Different Combination of Diameters of Two Tool Heads on Forming Quality in Double Sided Incremental Forming." Key Engineering Materials 904 (November 22, 2021): 20–25. http://dx.doi.org/10.4028/www.scientific.net/kem.904.20.

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The existing double sided incremental forming (DSIF) mostly uses two tools with the same diameter as the upper/lower tools, which is not conducive to improve the forming quality and forming efficiency. In this paper, the influence of the different combination of the upper and lower tool head diameters on the thickness distribution and the contour dimension accuracy of the formed part is studied by using ANSYS / LS-DYNA software and by taking the model with bidirectional convex features as the research object. It is found that the reasonable combination of different diameters of the upper/lower tools based on the characteristics of the parts to be formed can improve the forming quality and forming efficiency.

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Alcázar, Jackeline, Germán Abate, Nazareno Antunez, Alejandro Simoncelli, Antonio J. Sánchez Egea, Daniel Martinez Krahmer, and Norberto López de Lacalle. "Reduction of Die Wear and Structural Defects of Railway Screw Spike Heads Estimated by FEM." Metals 11, no. 11 (November 15, 2021): 1834. http://dx.doi.org/10.3390/met11111834.

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Railway spike screws are manufactured by hot forging on a massive scale, due to each kilometer of railway track needing 8600 spike screws. These components have a low market value, so the head must be formed in a single die stroke. The service life of the dies is directly related to the amount of energy required to form a single screw. The existing standard for spike screws specifies only the required tolerances for the head dimensions, particularly the angle of the hub faces and the radius of agreement of the hub with the cap. Both geometrical variables of the head and process conditions (as-received material diameter and flash thickness) are critical parameters in spike production. This work focuses on minimizing the energy required for forming the head of a railway spike screw by computational simulation. The variables with the highest degree of incidence on the energy, forging load, and filling of the die are ordered statistically. The results show that flash thickness is the variable with the most significant influence on forming energy and forming load, as well as on die filling. Specifically, the minimum forming energy was obtained for combining of a hub wall angle of 1.3° an as-received material diameter of 23.54 mm and a flash thickness of 2.25 mm. Flash thickness generates a lack of filling at the top vertices of the hub, although this defect does not affect the functionality of the part or its serviceability. Finally, the wear is mainly concentrated on the die splice radii, where the highest contact pressure is concentrated according to the computational simulation results.

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Inoue, Atsuto, Wataru Teraoka, Yasuhiro Oikawa, Takahiro Satou, Yasuyuki Iwane, and Masahito Kobayashi. "Sound Field Projection System using Optical See-Through Head Mounted Display." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 5 (August 1, 2021): 1267–74. http://dx.doi.org/10.3397/in-2021-1797.

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There are various ways to grasp the spatial and temporal structures of sound field. Sound field visualization is an effective technique to understand spatial sound information. For example, acoustical holography, optical methods, and beam-forming have been proposed and studied. In recent years, augmented reality (AR) technology has rapidly developed and is now more familiar. Many sensors, display devices, and ICT technologies have been implemented in AR equipment, which enable interaction between real and virtual worlds. In this paper, we propose an AR display system, which displays the results obtained by the beam-forming method. The system consists of 16ch microphone array, real-time sound field visualization system and optical see-through head mounted display (OST-HMD). Real-time sound field visualization system analyses sound signals recorded by 16ch microphone array by beam-forming method. Processed sound pressures data are sent to OST-HMD by using transmission control protocol (TCP), and colormap is projected on real world. Settings property of real-time sound field visualization system can be changed by using virtual user interface (UI) and TCP. In addition, multi-users can experience the system by sharing sound pressures and settings property data. Using this system, users wearing OST-HMD can observe sound field information intuitively.

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Frankenthaler, Robert, John G. Batsakis, and Patricia A. Suarez. "Tumefactive Fibroinflammatory Lesions of the Head and Neck." Annals of Otology, Rhinology & Laryngology 102, no. 6 (June 1993): 481–82. http://dx.doi.org/10.1177/000348949310200614.

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Tumefactive fibroinflammatory lesions of the head and neck are idiopathic, histologically benign, tumor-forming lesions that clinically simulate malignancies. Their histopathologic appearance is nearly identical to that of fibrosclerotic lesions of the mediastinum and retroperitoneum and Riedel's thyroiditis, and in some cases, a congeneric (periarteritis) origin is postulated. There is no optimum treatment, and recurrence and persistence are common. The suggested initial treatment is corticosteroid administration.

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Hsia, Shao Yi. "Cold Forming Simulation of Tapping Screws with Hexagon Flange Head Using Numerical Method." Key Engineering Materials 830 (February 2020): 9–14. http://dx.doi.org/10.4028/www.scientific.net/kem.830.9.

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Finite element method is used in this study for analyzing the process of chrome molybdenum tapping screws and discussing the effect of different process parameters on the formability of tapping screws. In the research process, SolidWorks matched with 3D scanning is first used for drawing the physical mold, which is then imported to DEFORM, a finite element forming software, for the tapping screws forming simulation and analysis. Through the spring constant adjustment of three different sliding upper dies, the simulation results and the physical measurement size are compared the difference in diameter or length before and after the formation, which does not exceed 2.38% at most. The research result could assist manufacturers in establishing the forming analysis process of tapping screws to find out the optimal mold and process parameters. In addition to prevent tail screws from defects in the production process, it could be used for the development and process evaluation of new-style screws.

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50

Zhu, Hu, Zhi Jun Liu, and Nan Li. "The Control of the Gap between Tool and Support, and the Analysis of its Effect on the Accuracy of CNC Incremental Forming." Advanced Materials Research 510 (April 2012): 368–74. http://dx.doi.org/10.4028/www.scientific.net/amr.510.368.

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Two kinds of methods for the control of the gap between pressing tool head and support in CNC incremental forming have been discussed (i.e. pressing path adjustment method and support shape adjustment method), and whose effects on forming accuracy are analyzed by using the Finite Element Analyses. The methods for the generation of pressing paths and supports have been given for the two forming method of the pressing path adjustment and support shape adjustment, and the Finite Element Analysis models have been built for them respectively. The method of digital simulations for the two forming cases mentioned above based on the ANSYS/LS-DYNA software has been presented and the forming precision of the two forming methods are analyzed through the comparison of digital simulation results.

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