Thematische Bibliographien / Spindle head

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Auswahl der wissenschaftlichen Literatur zum Thema „Spindle head“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 1. Februar 2022

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Zeitschriftenartikel zum Thema "Spindle head"

Han, Jian, Li Ping Wang und Lian Qing Yu. „Modeling and Estimating Thermal Error in Precision Machine Spindles“. Applied Mechanics and Materials 34-35 (Oktober 2010): 507–11. http://dx.doi.org/10.4028/www.scientific.net/amm.34-35.507.

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Thermal induced errors are significant factors that affect machine tool accuracy. The deformation of spindle is the main contributor to thermal error. In this paper, the thermal characteristics of the spindle system are investigated. Taking into account the coupling of elastic deformation and temperature, the heat conduction of the spindle system is modeled. The heat of bearings and heat transfer coefficient, and boundary conditions of the spindle are determined. Based on the numerical results, an iterative model of spindle's temperature and thermal deformation are acquired under the actions of thermal loads using the finite element method. Taking the spindle of precision boring machine with some reasonable assumptions and simplicities as an example, the finite element analysis model of spindle thermal characteristics is analyzed with virtual prototyping, and the static/transient temperature field and thermal-structure field are calculated using ABAQUS software. The characteristics of heat flow and thermal deformation within the spindle are analyzed according to the simulation results. The research results provide a theoretical foundation for reasonable arrangement and optimal design to reduce radial and axial deformation of the spindle head, temperature controlling, and the error compensation to the precision machining tool.

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Horiuchi, Osamu, Mitsuyoshi Nomura, Bo Xiao Ma, Takayuki Shibata, Yoshihiko Murakami und Masami Masuda. „Influence of Thermal Behavior of Spindle on Machining Accuracy in Micro-Endmilling“. Advanced Materials Research 418-420 (Dezember 2011): 2040–45. http://dx.doi.org/10.4028/www.scientific.net/amr.418-420.2040.

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This paper describes on the influence of thermal behavior of spindle on machining accuracy in micro-endmilling. In order to make clear the reasons why the depth of slot varies during slotting repeated, temperatures around the spindle head and the thermal expansion of spindle axis were investigated. The machine tool used for experiment was a small type of vertical machining center. The spindle used for experiment was a ball bearing spindle which rotated at 10000-40000 min-1. The spindle head made of aluminum alloy had various cooling systems for spindle motor and ball bearings, and the temperature of spindle head changed only a few degrees C. Therefore it seems difficult to assume that the primary cause was thermal deformation of spindle head structure, even though the coefficient of thermal expansion of aluminum alloy is approximately twice of that of steel. Finally the thermal expansion of spindle axis was partly measured and relation between the thermal expansion and the variation of depth of slots was investigated. The main results obtained are as follows, (1) Slotting after a long period warming-up of spindle resulted in a small change of depth of slot, but slotting without any warming-up caused an initial rapid increase and then saturation of depth of slot, (2) Temperature rise of spindle head and adjacent structure seemed out of relation to the variation of depth of slot, (3) The partially measured thermal expansion of spindle as well as temperature of lower flange of spindle showed qualitatively similar change corresponding to depth of slot.

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Ma, Shi Ming, Li Gang Cai, Yong Sheng Zhao, Zhi Feng Liu, Tie Neng Guo und Qiang Cheng. „Analytical Modeling of the Spindle Shaft of Heavy Load Deflection Angle Milling Head Dynamics Using Timoshenko Beam Model“. Advanced Materials Research 443-444 (Januar 2012): 823–29. http://dx.doi.org/10.4028/www.scientific.net/amr.443-444.823.

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The spindle shaft of heavy load deflection angle milling head is an important functional component of 5-axis CNC machine tool, which has characteristics of high torque and high power, used for large and complex free-form surface processing. The spindle shaft is modeled as Timoshenko’s beam by including the centrifugal force and gyroscopic effects. The effects on inherent characteristic of the spindle shaft of heavy load deflection angle milling head are analyzed owing to axial force and spindle shaft speed. Simultaneously, numerical solution of spindle shaft is gotten. And, the numerical results are well agree with the exact modeling, which illustrates that the theoretical modeling of spindle shaft is correct and the exact dynamic characteristics of spindle shaft is obtained. The analytical modeling results of spindle shaft are effective and helpful for design and improvement of spindle shaft of heavy load deflection angle milling head.

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Guschinskaya, Olga, und Alexandre Dolgui. „A Transfer Line Balancing Problem by Heuristic Methods: Industrial Case Studies“. Decision Making in Manufacturing and Services 2, Nr. 2 (18.12.2008): 33–46. http://dx.doi.org/10.7494/dmms.2008.2.2.33.

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The paper deals with the problem of optimal configuration of a type of transfer lines which are equipped with transfer machines. Such machines perform operations with standard modular spindle heads which are activated sequentially. All operations assigned to the same spindle head (block of operations) are executed simultaneously by a set of tools fixed at the spindle head. The quantity of machines and spindle heads used to produce a part with the given productivity rate defines the final cost of the transfer line which must be minimized. To minimize this cost, a combinatorial problem of operations assignment to blocks and machines must be solved. The solution must provide a desired productivity (cycle time), it must also satisfy precedence and compatibility constraints. In this paper, we suggest improved versions of FSIC heuristic algorithm in order to help line designers to solve real-scale industrial problems. Results of computational experiments obtained for industrial cases are presented.

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Wu, Huai Chao, Shi Tao Chen, Yong Yong He und Hui Juan Zhang. „Design and Finite Element Analysis of Liquid Sliding Bearing and the Matching Spindle of High-Speed Roller Grinding Head“. Applied Mechanics and Materials 278-280 (Januar 2013): 290–94. http://dx.doi.org/10.4028/www.scientific.net/amm.278-280.290.

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Through analyzing the design methods of liquid sliding bearing and the matching spindle of common roller grinding head, the design methods and ideas of liquid sliding bearing and the matching spindle of high-speed roller grinding head are put forward, and on these bases, a kind of liquid sliding bearing and the matching spindle of high-speed roller grinding head are designed. By means of finite element analysis of the bearing and the matching spindle respectively, it can be known that thermal property of the designed liquid sliding bearing can meet the working demands of high-speed roller grinding, and the designed spindle can meet the demands of strength and stiffness under the condition of high-speed grinding, thus, important reference materials for forming core technologies of high-speed roller grinding head are provided.

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Cao, Jin Ling, und Ying Luo. „Dynamic Analysis in Grinding Head of Roller Grinding Machine“. Advanced Materials Research 694-697 (Mai 2013): 259–62. http://dx.doi.org/10.4028/www.scientific.net/amr.694-697.259.

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In the article, the vibration resistance of spindle system in grinding head of roller grinding machine is studied by means of harmonic response and modal analysis, by using the method of the transfer matrix, obtained the first five orders of the natural frequency of spindle system. By studying the M84100A type spindle system in grinding head of roller grinding machine, obtained the conclusion that the natural frequency was far from the work frequency, so laid a foundation of the spindle system dynamic design.

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Chen, Shao Hsien, Chin Mou Hsu, Kuo Lin Chiu und Chu Peng Chan. „Research on High Performance Direct-Driving Motor Applied to Swivel Spindle Head“. Applied Mechanics and Materials 701-702 (Dezember 2014): 874–78. http://dx.doi.org/10.4028/www.scientific.net/amm.701-702.874.

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Swivel spindle head is a key component used in five-axis machine tool of high performance and is of great importance in application and design. Nowadays, more and more components are manufactured by high performance multi-axis CNC machine tools, such as components of spaceflight, renewable energy and automobile, etc. Therefore, high performance machine tools of multiple axes are more and more urgently demanded, while Swivel spindle head is one of the most important components for a multi-axis machine tool. Hence, Swivel spindle head is one of the key to developers multi-axis machine tool . The study explores the highly responsive direct-driving motor able to drive the spindle head to rotate with multi-driving rotary technology. The dual-driving motor rotates via multi-driving units, generates torsion that magnifies and eliminates its clearance, and then drives the spindle head to rotate. Results of the test show that the completed machine tool can meet the standards of dual axis rotary head with high preformation in, no matter, speed, distance, positional accuracy, repeated accuracy or maximum torque, etc.

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Sun, Hai Ming, Jing Jin und Bai Lin Ren. „Precision Lifetime Analysis and Grey Prediction Based on Observation Data for Motorized Spindle“. Applied Mechanics and Materials 421 (September 2013): 81–87. http://dx.doi.org/10.4028/www.scientific.net/amm.421.81.

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The stoppage and lifetime of high speed motorized spindle was related to many influence. A total of 31 statistical lifetime data of imported motorized spindles in cylinder head production line were presented, according to these data, and the average cut operation lifetime could reach 8277 hours, and the 8000 hours of average design precision lifetime was validated. It was found that the main influencing factors of motorized spindle lifetime in initial stage were the original manufacturing defects, also in precision lifetime stage and fatigue lifetime stage, the main influencing factors were the service conditions which exceeded design allowable conditions and own unique structural characteristics of motorized spindle respectively. according to 7 data and GM(1,1) grey theory, the precision lifetime prediction model of motorized spindle was built and the. model error was tested. The reliability of prediction model is validated by 2 inchoate reality observation data which relative differences were 0.57% and 2.03% respectively.

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Chen, Shao Hsien, Chin Mou Hsu, Kuo Lin Chiu und Chu Peng Chan. „The Impact of Different Direct-Driving Motor Design on Swivel Spindle Head“. Applied Mechanics and Materials 789-790 (September 2015): 791–94. http://dx.doi.org/10.4028/www.scientific.net/amm.789-790.791.

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Swivel spindle head is a key component used in gantry type five-axis machine tool of high performance and is of great importance in its application and design. Nowadays, more and more components are manufactured by high precision CNC machine tools, such as components of spaceflight, renewable energy and automobile, etc. Therefore, high precision machine tools of multiple axes are more and more urgently demanded, while dual axis rotary head is one of the most important components for a multi-axis machine tool. Hence, it will be a key to develop dual axis spindle head that meets high precision needs. The study explores the highly responsive direct-driving motor able to drive the spindle head to rotate with multi-driving rotary technology. The dual-driving motor rotates via multi-driving units, generates torsion that magnifies and eliminates its clearance, and then drives the spindle head to rotate. Results of the test show that the completed machine tool can meet the standards of dual axis rotary head with high precision in, no matter, speed, distance, positional accuracy, repeated accuracy or maximum torque, etc.

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Cao, Jin Ling, und Ying Luo. „The Analysis of Static and Dynamic Characteristic in Grinding Head of Roller Machine“. Advanced Materials Research 690-693 (Mai 2013): 2509–13. http://dx.doi.org/10.4028/www.scientific.net/amr.690-693.2509.

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On the basis of the establishment of the three-dimensional solid model of the roll grinder grinding head spindle system, carry out finite element static analysis, with the spindle structural stress and strain diagram, study its static characteristics, carry out modal analysis in the properly simplified spindle system with the finite element method, analyze the calculated natural frequency value , study dynamic characteristics of the spindle system, realized the dynamic design of the product.

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Dissertationen zum Thema "Spindle head"

Srněnský, Jan. „Návrh systému automatické výměny vřetenových hlav“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318528.

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The purpose of this thesis is to design system for automatic exchange of spindle heads shared by several machines. Spindle heads are transported between these machines and placed to the position for exchange. The system also allows storing of heads. Requirements for system are load capacity of 2 000 kg and placing a spindle head to the exchange position with precision of ± 0,02 mm. The thesis consists of three parts. The first part involves search of head exchange principles and shows possible ways to transport heads and other elements that could be used in the system. In the next part are several possible solutions introduced and the selection of the best one is made. The last part contains the design of the chosen solution, visualisation, description and calculations. The result is design of two solutions which are described in this work.

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Vazovan, Ľubomír. „Vřeteník a naklápěcí hlava frézovacího multifunkčního obráběcího centra s vodorovnou osou vřetena“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-402637.

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The thesis contains of draft, calculations, CAD model and drawing documentation of the moltifunctional machining center with horizontal axis of spindle. This thesis is one of the four parts with which connection ensue the machine-tool. In the first part of my work, there is a constructional draft of the headstock which will enable milling, turning and drilling. In the introduction of this part is headstock research which is solving the most important parts of the headstock of machine . Consequently, technical calculations are acoomplished. Based on these calculations, a specific constructional draft of the headstock is crafted. In the next part of my work, I do research in the area of removable paring milling heads. After this part, there are technical calculations and the specific constructional draft. In the entire work, there is emphasis put on simplicity and functionality.

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Sovadina, František. „Návrh vřeteníku soustruhu“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443734.

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The thesis deals with the design and construction of headstocks of a turning centre. The aim is to design a spindle with an output of 20 kW and a maximum speed of 5000 1/min. The research part of the thesis is focused on the description of the basic parameters of the headstock and turning centres needed for the construction of the headstock and contains an analysis of the available spindles on the market. The next part of the thesis deals with the selection and calculation of cutting conditions and the necessary parameters. Analytical calculations are then verified using FEM analysis. At the end of the thesis, a 3D model was developed and headstock drawing documentation.

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Vyplašil, Jan. „Návrh horizontální výměnné hlavy - VA1 –C“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229757.

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Diploma thesis deals with the concept of interchangeable straight spindle head type VA1-C, used for automatic clamping in 80 kW spindle head from production of TOS Kuřim. Thesis contains survey of interchangeable heads, analysis of the spindle housing, strenght analysis of the spindle with the safety calculations in critical sec-tions and analysis of the clamping mechanism together with the calculation of the camping force, which holds the tools in the spindle. Analysis of the camping mechanisms contains calculation of the contact stress between balls and housings. All results are shown in the graphs. In the last part of the thesis are described the construction elements using the model of the interchangeable head. Enclosed is the assembly drawing of the spindle head, bill of material, detail drawing of the spindle and also 3D model of the interchangeable spindle head.

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Nedbal, David. „Návrh manuální pravoúhlé frézovací hlavy určené pro technologické operace na středně těžkých obrobcích“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-382413.

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This thesis deals with mechanical design of right-angle manual milling head for headstock of horizontal boring machine of Fermat production. The thesis includes research of milling head types, Fermat production heads, but also heads of competition companies with similar parameters like designed head. Design part of thesis is about describing used components of chosen solution. The thesis includes also technical report describing calculation of load spectrum from machining, design of gears, calculation of reactions in spindle bearings, spindle deformation and control of spindle bearings. The end of the thesis describes financial evaluation including also comparation with competitive milling heads with similar parameters.

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Svoboda, Ondřej. „Konstrukce pravoúhle prodloužené frézovací hlavy pro horizontální vyvrtávačku“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231164.

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This thesis deals with design of right-angled elongated milling head for horizontal boring machine of FERMAT production. The thesis includes a detailed research of milling heads, a description of the head´s basic components and certain commercially available head´s comparison. Design part is describe components description and the design. Calculations are focused on determinating of forces generated during machining, setting of loading spectrum and the power load calculating individual gears during machining. In the next part is calculation of the reactions in the spindle bearings included, the equivalent load and durability of spindle bearings, spindle deformation and spindle bearings optimum distance. The thesis also includes spindle strength calculation, horizontal and vertical shafts analysis, gears design with helical teeth and gear strength. The thesis describes the design of extended milling head and particular design nodes which is supplemented by the 3D model. In this thesis is also included a drawing of assembly and components.

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Tocháček, Jakub. „Návrh zrychlovací hlavy pro vřeteník horizontální vyvrtávačky“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241857.

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This thesis deals with conceptual design of spindle speeder head for headstock of horizontal boring machine of FERMAT Company. The thesis includes research part, which is initially given to horizontal boring machines and their accessories and continues with an overview and comparison of spindle speeders that are currently on the market. The work includes technical report, which is aimed on design of the belt drive including the idler pulley. Design of belt drive is based on the output of the calculation program developed by manufacturer of synchronous belts. Calculation part, mainly focused on the spindle and its bearings, is preceded by a part in which are calculated cutting forces for two technological operations. Calculation of the spindle part contains strength calculation of the spindle and equivalent basic rating life of spindle bearings, including calculating of radial stiffness at the spindle nose and calculation of optimal distance between the spindle bearings. At the end of the technical report is a financial summary, description of used components and the chosen design solution. The drawings which are based on model assembly processed in 3D CAD system, contains a drawing of the entire device and drawings of selected components.

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Raszka, Pavel. „Vývoj vřeteníku pro horizontální vyvrtávací centrum“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-401042.

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The master´s thesis deals with the design of the headstock for the horizontal boring center and design of the milling head. In the first part of the thesis, a search is made in the field of boring machines, main parts of boring machine headstock and milling heads. Based on this theoretical analysis, the input parameters for the calculation of the tension, power and torque characteristics of the headstock are selected. Subsequently, the design of the headstock and milling head is done using a 3D model.

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Ryšavý, Radek. „Návrh obrábění součásti včetně její montáže“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-402502.

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This diploma thesis is focused on piece production of the component and its subsequent assembly. It is an interchangeable spindle head marked VA1 from the product portfolio of TOS KUŘIM - OS, a.s. The aims of the diploma thesis include the characteristics of the assigned component, the subsequent analysis of the current manufacturing and assembly process. In the price calculations chapter, the direct and indirect input costs for the part production are quantified. Proposals to improve production were presented to the company and offered for possible implementation.

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Matěja, Josef. „Konstrukce multifunkčního obráběcího centra“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230916.

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The Diploma thesis deals with the design solution of multi-functional machining centre, especially with one of its parts – the design of the slide ram and vertical feed incl. the choice of convenient tool heads for the slide ram. The introducing part deals with the numerically controlled machines and centres generally, especially with the portal-type ones. It contains description of individual machine parts including examples of accessories from product plans of domestic and foreign producers. The second part of the Diploma thesis contains calculations and design solution of the slide ram and feed including the choice of the most suitable accessories applicable for this purpose. In the final phase the model of the slide ram has been introduced in the imersion virtual reality and integrated in the complete machine design. The Diploma thesis has been elaborated using the relevant technical literature.

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Bücher zum Thema "Spindle head"

Poretti, Andrea, und Thierry A. G. M. Huisman, Hrsg. Neonatal Head and Spine Ultrasonography. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-14568-6.

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South Carolina. Head & Spinal Cord Injury Task Force. The Head & Spinal Cord Injury Task Force report. Columbia, S.C: South Carolina Developmental Disabilities Council, Office of the Governor, 1992.

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Ward, Tena H. Head and spinal cord injury in North Carolina. Raleigh, N.C: N.C. Department of Environment, Health, and Natural Resources, Division of Statistics and Information Services, Center for Health and Environmental Statistics, 1991.

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International, Conference on Recent Advances in Neurotraumatology (1986 Cologne West Germany). Advances in neurotraumatology: Multiple injuries, intracranial hematomas, brain death, spinal injuries. Berlin: Walter de Gruyter, 1989.

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Virginia. General Assembly. Joint Subcommittee Studying the Needs of Head and Spinal Cord Injured Citizens and the Need for Research Pursuant to House Joint Resolution No. 135. Report of the Joint Subcommittee Studying the Needs of Head and Spinal Cord Injured Citizens and the Need for Research Pursuant to House Joint Resolution No. 135: To the Governor and the General Assembly of Virginia. Richmond, Va: Commonwealth of Virginia, 1989.

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Valk, Jaap. MRI of the Brain, Head, Neck and Spine. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3351-4.

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von Schulthess, G. K., und Ch L. Zollikofer, Hrsg. Diseases of the Brain, Head and Neck, Spine. Milano: Springer Milan, 2004. http://dx.doi.org/10.1007/978-88-470-2131-0.

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Hodler, J., G. K. Schulthess und Ch L. Zollikofer, Hrsg. Diseases of the Brain, Head & Neck, Spine. Milano: Springer Milan, 2008. http://dx.doi.org/10.1007/978-88-470-0840-3.

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K, Mukherji Suresh, Hrsg. Imaging of the pediatric head, neck, and spine. Philadelphia: Lippincott-Raven, 1996.

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Buchteile zum Thema "Spindle head"

G., Mousavi Said, Gagnol Vincent und Ray Pascal. „Integration of Drill Torsional-Axial Coupling in a Global Spindle-Self Vibratory Drilling Head Model“. In Lecture Notes in Mechanical Engineering, 81–88. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-37143-1_10.

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Rossi, Andrea. „The Acute Pediatric Spine and Spinal Cord“. In Diseases of the Brain, Head and Neck, Spine 2016-2019, 317–36. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-30081-8_34.

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Marani, Enrico, und Ciska Heida. „Cranial Nerves and Cervical Spinal Nerves“. In Head and Neck, 363–428. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-92105-1_12.

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Syed, Mubin I., und Azin Shaikh. „Head and Neck“. In Radiology of Non-Spinal Pain Procedures, 5–42. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-00481-0_2.

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López-Pino, Miguel Ángel, Elena García-Esparza und Javier Telletxea-Elorriaga. „Head and Spine Trauma“. In Sports Injuries in Children and Adolescents, 1–22. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-54746-1_1.

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Poretti, Andrea, und Thierry A. G. M. Huisman. „Neonatal Spine Abnormalities“. In Neonatal Head and Spine Ultrasonography, 157–67. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-14568-6_13.

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Ramchandran, Subaraman, Themistocles S. Protopsaltis und Christopher P. Ames. „Cervicothoracic Kyphosis (Dropped Head Deformity) Surgery Complication“. In Spinal Deformity, 67–74. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-60083-3_9.

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Marani, Enrico, und Ciska Heida. „Posture and Motion of the Cervical Spine“. In Head and Neck, 289–317. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-92105-1_10.

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Flanders, A. E. „Spinal Trauma and Spinal Cord Injury“. In Diseases of the Brain, Head and Neck, Spine, 189–92. Milano: Springer Milan, 2004. http://dx.doi.org/10.1007/978-88-470-2131-0_30.

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Valk, Jaap. „Spinal Lesions“. In MRI of the Brain, Head, Neck and Spine, 127–207. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3351-4_5.

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Konferenzberichte zum Thema "Spindle head"

Ling, Catherine, Derek Yip-Hoi und Yoram Koren. „Hole Pattern Identification in Gang Spindle Head Design for Reconfigurable Machining Systems“. In ASME 2000 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/detc2000/dac-14279.

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Abstract A systematic methodology for automatic gang spindle head design through parallelism-based operation clustering is an important component in Reconfigurable Machining System (RmS)1 design. Such parallelism-based operation clusters as we refer to them, must satisfy a set of constraints in order to be processed simultaneously on a gang spindle head. A group of operations should be decomposed if any constraint is violated. In doing this, the identification of clusters with identical patterns can potentially lead to savings in machine design and reconfiguration costs. To identify these patterns manually is time consuming and prone to error. This paper presents a pattern identification algorithm that will recognize identical pattern clusters by first searching for translational vectors (or rotational vectors) and then extracting the appropriate sets of end-points. The algorithm automatically obtains all alternative solutions so that finding identical patterns on different faces of the part or on different parts within a part family can be implemented. This strategy maximizes the usage of identical spindles and/or machines. The cost associated with redesigning, testing, and reconfiguration is significantly reduced. Such a tool can be used by the system designer for gang spindle head design in the RmS domain.

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Zhang, Ya. „Kinematic Errors Modeling Method of Five-axis Machine Tool with a Universal Spindle Head“. In 2017 6th International Conference on Measurement, Instrumentation and Automation (ICMIA 2017). Paris, France: Atlantis Press, 2017. http://dx.doi.org/10.2991/icmia-17.2017.100.

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Chong, Andrew, Lu Yi, S. X. Chen und Q. D. Zhang. „Experimental Characterization Techniques for High Performance Hard Disk Drive Ball Bearing Spindle Motors“. In ASME 1999 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/detc99/vib-8331.

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Abstract The key task for the spindle motor in a hard disk drive is to provide stable, reliable and consistent turning power for many years to allow the hard drive to function properly. As hard disks become more advanced, virtually every component in them is required to do more & perform better, and the spindle motor is no exception. Increasing the rotational speed at which the platters spin means that the data can be read off the disk faster, and also reduces rotational latency, the time that the heads must wait for the correct sector number to come under the head. For this reason, there has been a push to increase the speed of the spindle motor. Since the launching of hydro-dynamic bearing spindle technology for high speed application will not be in due course, current ball bearing technology will still be around for a couple of years provided the spindle speed does not exceed around 15 Krpm. Therefore optimizing the steel balls in the spindle system is an alternative to deal with the ever-increasing performance requirements of the hard disk drive. To accomplish this, we have to understand the failure phenomenon in the spindle, thereby set test requirements to overcome the failure mechanism. These test requirements will help us to understand the performance characteristic and robustness of the spindle motor. In this paper, the test requirements is set according to modal, load and vibration methods to quantify the hard disk drive ball bearing spindle motor.

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Mousavi, Said, Vincent Gagnol und Pascal Ray. „Integration of Drill Torsional-Axial Coupling in Spindle-Vibratory Drilling Head Model for Stability Analysis“. In ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/detc2013-12049.

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The drilling of deep holes with small diameters remains an unsatisfactory technology, since its productivity is rather limited. The main limit to an increase in productivity is directly related to the poor chip evacuation, which induces frequent tool breakage and poor surface quality. Retreat cycles and lubrication are common industrial solutions, but they induce productivity and environmental drawbacks. An alternative response to the chip evacuation problem is the use of a vibratory drilling head, which enables the chips to be fragmented thanks to the axial self-excited vibration. Contrary to conventional machining processes, axial drilling instability is sought, thanks to an adjustment of head design parameters and appropriate conditions of use. In this paper, self-vibratory cutting conditions are established through a specific stability lobes diagram. A dynamic high-speed spindle / drilling head / tool system model is elaborated on the basis of rotor dynamics predictions. The model-based tool tip FRF is integrated into an analytical stability approach. The torsional-axial coupling of the twist drill is investigated and consequences on drilling instability are established. Specific stability lobes are established and indicate modifications of self-excited operating zones. This approach allows refining the stability prediction of the global system during a drilling operation.

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Levi, P. G., und F. E. Talke. „Effect O F Ramp Profile And Spindle Speed On Head-disk Contact During Rotary Load/unload“. In 1993 Digests of International Magnetics Conference. IEEE, 1993. http://dx.doi.org/10.1109/intmag.1993.642650.

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Wang, Min Da, Min Wang, Huan Huan Niu, Jian Yong Liu und Er Yang Pei. „Vibration Testing and Structural Optimization of EDM Spindle Head by Using Modal Test Combined with ODS“. In The Joint Conferences of 2015 International Conference on Computer Science and Engineering Technology (CSET2015) and 2015 International Conference on Medical Science and Biological Engineering (MSBE2015). WORLD SCIENTIFIC, 2015. http://dx.doi.org/10.1142/9789814651011_0023.

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Dassanayake, K. M. Muditha, Ken Yamamot und Masaomi Tsutsumi. „A Methodology for Identifying Inherent Deviations in Universal Spindle Head Type Multi-Axis Machines by Simultaneous Five-Axis Control Motions“. In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-13440.

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In this paper, two different simulataneous five-axis control motions were newly proposed to identify the ten inherent deviations in universal spindle head type multi-axis machines. The ball bar was used as a measuring device. Both of the two motions were carried out bu using a single setup which was a simple extension bar. This leads to reduce non-productive time of the operator within the machine work space. Three measurments were used to estimate the ten deviations in which two measurements were extracted by means of axial direction motion and the other by tangential direction motion. By using the axial direction motion, seven deviations were estiamted in which four deviations were estiamted by means of the observation equation and simple geometric relations were used for other three. Remaining three of the ten deviations was estimated by using tangential direction motion. The validity of the proposed methodology for identifying the ten deviations inherent to universal spindle head type five-axis machining centers is confirmed by simulations.

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Trinh, Tan D., Frederick E. Spada, Andrey Ovcharenko und Frank E. Talke. „Investigation of the Contact Potential of the Head-Disk Interface Using Kelvin Probe Measurements“. In ASME-JSME 2018 Joint International Conference on Information Storage and Processing Systems and Micromechatronics for Information and Precision Equipment. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/isps-mipe2018-8579.

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The contact potential across the head-disk interface is investigated. AC voltage was applied to the disk surface using a mercury connector located at the top of the spindle, keeping the recording head grounded. The acoustic emission (AE) and touchdown sensor (TDS) amplitude was measured as a function of the DC offset voltage to determine the contact potential across the head-disk interface at which the AE and TDS signals, respectively, becomes a minimum. The contact potential across the head-disk interface is studied as a function of temperature, relative humidity, and wear of the head-disk interface.

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Su, Wenjun, Shaoke Wan, Yanhui Sun, Jun Hong und Xiaohu Li. „Contactless Measurement of Spindle Stiffness by Using Lateral Stator Magnetic Loader“. In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-70382.

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In this paper, a novel radial loading topology is proposed for various spindle test application where the space in the tool head is limited or the performance to the length is sensitive. The stator of the loading device grows in the lateral direction, allowing for a compact axial length design. Finite element analysis (FEA) is carried out and the device design is optimized for the specifications of a radial loading device for high speed spindle. Finally, the designed device were manufactured and tested. By using this magnet loader, measurement results are given and the effectiveness of the designed prototype has been verified.

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Wang, Jianhua, Qiushi Hu, Zhifeng Liu und Ying Li. „Research on the Deformation of the Spindle Head of Double Tauren EDM Machine Tool Based on ANSYS“. In 2015 International Conference on Computer Science and Mechanical Automation (CSMA). IEEE, 2015. http://dx.doi.org/10.1109/csma.2015.73.

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Berichte der Organisationen zum Thema "Spindle head"

Burkhardt, Gary L. NDE (Nondestructive Evaluation) of Black Hawk Helicopter Rotary Wing-Head Spindle Threads Using Electric Current Perturbation. Fort Belvoir, VA: Defense Technical Information Center, November 1985. http://dx.doi.org/10.21236/ada196002.

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BIODYNAMIC RESEARCH CORP SAN ANTONIO TX. A PC-Based Head-Spine Model, HSM-PC. Fort Belvoir, VA: Defense Technical Information Center, Januar 1999. http://dx.doi.org/10.21236/ada361392.

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Hicks, Ramona R. Brain-Derived Neurotrophic Factor (BDNF) and Traumatic Brain Injury (Head and Spinal). Fort Belvoir, VA: Defense Technical Information Center, Januar 2000. http://dx.doi.org/10.21236/ada375796.

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Ji, Qing-hui. Efficacy of extracorporeal shock wave combined spinal core decompression for the treatment of patients with femoral head necrosis: a protocol for systematic review and meta-analysis. INPLASY - International Platform of Registered Systematic Review Protocols, April 2020. http://dx.doi.org/10.37766/inplasy2020.4.0092.

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Lin, Qianqian, Yafeng Ren, Kewei Chen, Huijie Duan, Meng Chen und Chengmei Liu. Efficacy and safety of heat-sensitive moxibustion in the treatment of neurogenic bladder after spinal cord injury：a protocol for systematic review and meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, Mai 2021. http://dx.doi.org/10.37766/inplasy2021.5.0071.

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Chou, Roger, Jesse Wagner, Azrah Y. Ahmed, Ian Blazina, Erika Brodt, David I. Buckley, Tamara P. Cheney et al. Treatments for Acute Pain: A Systematic Review. Agency for Healthcare Research and Quality (AHRQ), Dezember 2020. http://dx.doi.org/10.23970/ahrqepccer240.

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Objectives. To evaluate the effectiveness and comparative effectiveness of opioid, nonopioid pharmacologic, and nonpharmacologic therapy in patients with specific types of acute pain, including effects on pain, function, quality of life, adverse events, and long-term use of opioids. Data sources. Electronic databases (Ovid® MEDLINE®, PsycINFO®, Embase®, the Cochrane Central Register of Controlled Trials, and the Cochrane Database of Systematic Reviews) to August 2020, reference lists, and a Federal Register notice. Review methods. Using predefined criteria and dual review, we selected randomized controlled trials (RCTs) of outpatient therapies for eight acute pain conditions: low back pain, neck pain, other musculoskeletal pain, neuropathic pain, postoperative pain following discharge, dental pain (surgical or nonsurgical), pain due to kidney stones, and pain due to sickle cell disease. Meta-analyses were conducted on pharmacologic therapy for dental pain and kidney stone pain, and likelihood of repeat or rescue medication use and adverse events. The magnitude of effects was classified as small, moderate, or large using previously defined criteria, and strength of evidence was assessed. Results. One hundred eighty-three RCTs on the comparative effectiveness of therapies for acute pain were included. Opioid therapy was probably less effective than nonsteroidal anti-inflammatory drugs (NSAIDs) for surgical dental pain and kidney stones, and might be similarly effective as NSAIDs for low back pain. Opioids and NSAIDs were more effective than acetaminophen for surgical dental pain, but opioids were less effective than acetaminophen for kidney stone pain. For postoperative pain, opioids were associated with increased likelihood of repeat or rescue analgesic use, but effects on pain intensity were inconsistent. Being prescribed an opioid for acute low back pain or postoperative pain was associated with increased likelihood of use of opioids at long-term followup versus not being prescribed, based on observational studies. Heat therapy was probably effective for acute low back pain, spinal manipulation might be effective for acute back pain with radiculopathy, acupressure might be effective for acute musculoskeletal pain, an opioid might be effective for acute neuropathic pain, massage might be effective for some types of postoperative pain, and a cervical collar or exercise might be effective for acute neck pain with radiculopathy. Most studies had methodological limitations. Effect sizes were primarily small to moderate for pain, the most commonly evaluated outcome. Opioids were associated with increased risk of short-term adverse events versus NSAIDs or acetaminophen, including any adverse event, nausea, dizziness, and somnolence. Serious adverse events were uncommon for all interventions, but studies were not designed to assess risk of overdose, opioid use disorder, or long-term harms. Evidence on how benefits or harms varied in subgroups was lacking. Conclusions. Opioid therapy was associated with decreased or similar effectiveness as an NSAID for some acute pain conditions, but with increased risk of short-term adverse events. Evidence on nonpharmacological therapies was limited, but heat therapy, spinal manipulation, massage, acupuncture, acupressure, a cervical collar, and exercise were effective for specific acute pain conditions. Research is needed to determine the comparative effectiveness of therapies for sickle cell pain, acute neuropathic pain, neck pain, and management of postoperative pain following discharge; effects of therapies for acute pain on non-pain outcomes; effects of therapies on long-term outcomes, including long-term opioid use; and how benefits and harms of therapies vary in subgroups.

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Single-phase heat transfer and pressure drop characteristics of an integral-spine-fin within an annulus. Gaithersburg, MD: National Institute of Standards and Technology, 1994. http://dx.doi.org/10.6028/nist.ir.5454.

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