Thematische Bibliographien / Test jigs

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Auswahl der wissenschaftlichen Literatur zum Thema „Test jigs“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 1. Februar 2022

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Zeitschriftenartikel zum Thema "Test jigs"

Matusiak, Piotr, und Horst Gondek. „New Implementations of Komag Jigs for Coking and Steam Coal in Collaboration with Carbo-Eco and Fugor Companies“. Management Systems in Production Engineering 28, Nr. 4 (01.12.2020): 259–67. http://dx.doi.org/10.2478/mspe-2020-0037.

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AbstractThe basic process of minerals’ mechanical preparation, including coal, is a beneficiation process which has a decisive impact on quantitative-and-qualitative parameters of commercial products. At present the products of the MBE-CMT, Allmineral and Tenova companies have big market shares as regards foreign water pulsatory jigs, as well as ITG KOMAG on the local Polish market. New implementations of jigs, developed at the KOMAG Institute of Mining Technology, for beneficiation of coking coal and steam coal in collaboration with Carbo-Eco Ltd. and Fugor Ltd. companies, were realized in 2019. Technical and technological parameters of new devices are described in the article. Supply systems of feed are presented as well as the method of collecting tailings and middlings. New design solutions, applied in modernized preparation plants, aimed at an improvement of jigs production capacity and efficiency are presented. In the case of each jig, after its activation and conducted adjusting processes, exact tests of a beneficiation efficiency were performed and their results are presented in the tabular form. Basic beneficiation accuracy indicators and parameters of products’ separation as well as balances of products are given. The test results, obtained from newly activated jigs, are discussed.

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Furushima, Tsuyoshi, Kohei Aoto und Sergei Alexandrov. „A New Compression Test for Determining Free Surface Roughness Evolution in Thin Sheet Metals“. Metals 9, Nr. 4 (17.04.2019): 451. http://dx.doi.org/10.3390/met9040451.

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In sheet microforming processes, in-surface principal strain rates may be compressive such that the thickness of the sheet increases in the process of deformation. In general, the evolution of free surface roughness depends on the sense of the principal strain normal to the free surface. Therefore, in order to predict the evolution of free surface roughness in processes in which this normal principal strain is positive by means of empirical equations, it is necessary to carry out experiments in which the thickness of the sheet increases. Conventional experiments, such as the Marciniak test, do not provide such strain paths. In general, it is rather difficult to induce a sufficiently uniform state of strain in thin sheets of increasing thickness throughout the process of deformation because instability occurs at the very beginning of the process. The present paper proposes a compression test for thin sheets. Teflon sheets are placed between support jigs and the metallic sheet tested to prevent the occurrence of instability and significantly reduce the effect of the support jigs on the evolution of surface roughness. The test is used to determine the evolution of surface roughness in thin sheets made of C1220-O under three strain paths.

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Kumar, Reena R., Mayank Gahlot, Nameeta Kaur und Anil Miglani. „Effect of Aerated Drinks on Force Decay Properties of Elastomeric Chains: An In Vitro Study“. Orthodontic Journal of Nepal 1, Nr. 1 (01.11.2011): 20–23. http://dx.doi.org/10.3126/ojn.v1i1.9361.

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Objective: To evaluate the effect of three commercially available aerated drinks on percentage of force decay of elastomeric chains used for orthodontic space closure. Materials & Method: Commercially available closed grey and clear elastomeric chains from two manufacturers were used in the study. The test solutions were distilled water (control), popular lemon based aerated drink, an orange based aerated drink and an aerated cola drink. Four acrylic resin jigs were constructed to provide a framework to simulate the distance between the permanent canine and first molar. The elastomeric chains were stretched and engaged between the two attachments. Jig I, II and III were immersed in the cola, orange and aerated lemon drink respectively for a period of two hours daily. Jig IV (control) was immersed in distilled water. Force levels were evaluated at the time intervals of 0 hours, 2 hrs, 12 hrs, 24 hrs, 3 days, 5 days and 7 days with a mechanical force gauge. Result: Force decay was statistically significant at T1 i.e. 2 hrs post immersion for all drinks compared. This decay was the highest for the elastomeric chains immersed in orange based drink followed by cola, lemon and the control. There was no significant difference between the two tested elastomeric chains. Conclusion: History recording should take cognizance of consumption of aerated drinks and their effect on orthodontic space closure.

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Shenoy, S. M., und C. D. Rahn. „Neural Adaptive Control for Positioning Fabric on a Frictional Surface“. Journal of Manufacturing Science and Engineering 121, Nr. 1 (01.02.1999): 127–33. http://dx.doi.org/10.1115/1.2830564.

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This research focuses on real-time position control for draping fabric sliding on a high friction surface. Although fabrics are usually positioned on smooth surfaces with fixed fabric guides to simplify automated handling, a high friction work surface holds the fabric in place after positioning, allowing accurate assembly of multiple fabric parts without specialized jigs or fixtures. A neural adaptive controller with feedforward friction compensation provides asymptotic tracking for a spring mass model with friction. A test stand and an optical sensor are designed to facilitate real time position measurement and control. The neural adaptive controller demonstrates good position tracking and robustness to fabric property variations relative to open loop or PID control.

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Sakamoto, Haruhisa, Taiga Matsuda und Shinji Shimizu. „Effect of Clamped Toolholders on Dynamic Characteristics of Spindle System of Machining Center“. International Journal of Automation Technology 6, Nr. 2 (05.03.2012): 168–74. http://dx.doi.org/10.20965/ijat.2012.p0168.

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In this study, dynamic characteristics are determined based on the impulse response method, the correction of discretization errors and the identification of equivalent physical parameters, as found in the vibration model having one degree of freedom. In the experiments, the test tool is cylindrical bar shaped and made from solid tungsten carbide, and four toolholders with chucking mechanisms, including the shrinkfit type, collet type, hydraulic type, and press-fit type, are used. Since it had been previously confirmed that one of the tool preparation jigs had dynamic characteristics similar to those of an actual machine tool’s spindle, the dynamic characteristics of the jig could be measured the way the spindle system is measured in this study. From the experimental examinations, the following were clarified. (1) Chucking of the tooling system enhances the first mode vibration of the spindle system markedly. (2) The type of tool chuck used changes the dynamic characteristics of the spindle system. The trend in the dynamic stiffness corresponds well with that in the equivalent damping coefficient but is opposite to that in the equivalent stiffness. (3) The magnitude order of the dynamic characteristic parameters of the spindle system corresponds well with the inherent values of the dynamic characteristic parameters of the toolholders themselves; that is, the inherent dynamic characteristics of the tooling system can be used as the criteria to estimate the effect on the dynamic characteristics of the spindle system.

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Gagne, Oliver J., Andrea Veljkovic, Dave Townshend, Alastair Younger, Kevin J. Wing und Murray J. Penner. „Intraoperative Assessment of the Axial Rotational Positioning of a Modern Ankle Arthroplasty Tibial Component Using Preoperative Patient-Specific Instrumentation Guidance“. Foot & Ankle International 40, Nr. 10 (22.07.2019): 1160–65. http://dx.doi.org/10.1177/1071100719856548.

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Background: The use of patient-specific instrumentation (PSI) in modern total ankle replacement (TAR) has augmented positioning of the tibial component, eliminating the need for complex jigs. Coronal and sagittal alignment are intuitive with this design and have been studied, but axial rotation has not. The purpose of this study was to assess the relationship between the planned preoperative axial rotation as set by the PSI guide and the rotation determined intraoperatively with non-PSI instrumentation. Methods: This was a prospective cohort study of 22 consecutive cases. The axial rotation angle between the medial gutter and the tibial implant position on the preoperative CT-scan based plan was extracted. At the time of surgery, the medial gutter alignment instrument from the non-PSI instrumentation was inserted and an intraoperative axial photograph obtained to record the angle between the medial gutter and the axial rotation guide pins set by the PSI instrumentation. The 2 measurements were compared and further statistical analysis included Pearson correlation and paired Student t test. Results: The average axial rotation angle between the medial gutter and the implant on the PSI preoperative plan was 5.4 ± 2.9 degrees, whereas the intraoperative photograph from the medial gutter alignment instrument to the pin was 5.9 ±3.8 degrees. This demonstrated a Pearson correlation of R = 0.54 and a P value of .53. The average difference between the two was −0.46 (95% CI: –2.04, 1.10), meaning that components were either slightly externally rotated or that the fork was aimed internally. Based on this group, 50% (11/22) were within 2 degrees of the target and 77% (17/22) were within 4 degrees of the target. Conclusion: Patient-specific guides allowed for reproducible rotational tibial component implantation in modern TAR. Further work is needed to better understand the biomechanical effects of the rotational profile and consequences on survivorship. Level of Evidence: Level IV, case series.

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Gasik, Michael M., und Akira Kawasaki. „Analysis and Simulation of FGM Thermal Barrier Coatings Hot Burner Testing“. Materials Science Forum 631-632 (Oktober 2009): 79–84. http://dx.doi.org/10.4028/www.scientific.net/msf.631-632.79.

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For FGM thermal barrier coatings thermal-mechanical fatigue due to temperature cycling is one of the critical parameters which determine the lifetime of the TBC. In Tohoku University, a method known as “hot burner test” has been developed and was implemented into the standard JIS H 7851. For further optimization of the testing conditions and selection of the parameters for comparison of different test results knowledge of temperature and heat flux inside the test jig is necessary. FEM analysis of the heat flux and temperature inside the 14 mm diameter test stainless steel jig has been performed. Homogenous YSZ top coat with NiCrAlY bondcoat as well as FGM TBC with different gradation profiles were compared. Distributions of the temperature and heat flux are critical at the edges of the test piece and thermocouples locations, which must be taken into account when comparing test data for coatings with rather different composition and structure. The largest stress gradients develop at the ceramic-metal interface (duplex) and near the edges of the TBC.

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Kishitani, Koichi, Masaki Kobayashi und Hiroshi Tamura. „The rapid test JIS A 1804“. Cement and Concrete Composites 16, Nr. 3 (Januar 1994): 169–75. http://dx.doi.org/10.1016/0958-9465(94)90014-0.

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SUZUKI, KENTARO. „Establishment of JIS for "Methods of Test for Woods". Amendment of JIS for "Method of Test for Decay of Wood".“ Wood Preservation 20, Nr. 3 (1994): 136–38. http://dx.doi.org/10.5990/jwpa.20.136.

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Singh, Sandeep K., Sangeeta Sabharwal und J. P. Gupta. „A Novel Approach for Deriving Test Scenarios and Test Cases from Events“. Journal of Information Processing Systems 8, Nr. 2 (30.06.2012): 213–40. http://dx.doi.org/10.3745/jips.2012.8.2.213.

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Dissertationen zum Thema "Test jigs"

Serediuk, Vadym. „Návrh průkazných statických pevnostních zkoušek letounu v kategorii UL“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443247.

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The diploma thesis involves the design of certification static strength tests for the newly developed aircraft of the TL-Ultralight company. At the beginning of the work, the theory of aircraft testing is generally discussed with emphasis on static strength tests. Furthermore, an analysis of the requirements of the Czech regulation UL 2 and the German LTF-UL, which represent the certification basis for this aircraft, is performed. The requirements of regulations on the construction of the aircraft (or its individual parts) and the requirements for strength tests are discussed in detail. Based on the regulation and the provided calculation protocols, individual test cases and test plans of the wing, tail surfaces, engine bed, and chassis are calculated and prepared. In the end, the calculation of the rocker system and the basic design of jigs are performed.

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Buchteile zum Thema "Test jigs"

Benajiba, Yassine, Paolo Rosso und José Manuel Gómez Soriano. „Adapting the JIRS Passage Retrieval System to the Arabic Language“. In Computational Linguistics and Intelligent Text Processing, 530–41. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-70939-8_47.

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„1 Artful Remembrance: Reading, Writing, and Reconstructing the Fallen State in Lu Ji’s “Bian wang”“. In Memory in Medieval China: Text, Ritual, and Community, 10–35. BRILL, 2018. http://dx.doi.org/10.1163/9789004368637_003.

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Konferenzberichte zum Thema "Test jigs"

Verma, Shefali, und N. M. Wagdarikar. „Automated test jig for refrigerator PCB performance“. In 2016 International Conference on Automatic Control and Dynamic Optimization Techniques (ICACDOT). IEEE, 2016. http://dx.doi.org/10.1109/icacdot.2016.7877705.

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Lee, Choongryeong, und Hyun-Yong Jeong. „A Fatigue Test to Assess the Deformation Behavior of Dental Implants“. In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-38336.

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A purpose of this paper is to analyze the effects of material properties and design of a jig on fatigue test results of dental implants. An implant fatigue test method is specified in ISO14801 [1], but it is not described well about the fatigue test jig. The jig of ISO14801 has to firmly hold the fixture, and the elastic modulus of the jig should be more than 3 GPa. These requirements are not sufficient enough to represent the dental implant in the jawbone because the fixture is osseointegrated in the jawbone that is made up with the cortical bone and cancellous bone. In this paper three different materials were used for the jig, and two different fixation methods to hold the fixture were examined in several FE (Finite Element) simulations and fatigue tests. From the simulation and test results, the effects of material properties and design of the jig were evaluated in the light of fatigue life of dental implants.

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Venter, Johan, und Daniel Rodrigues Van Niekerk. „A Cost-Effective Low-Voltage Moulded-Case Circuit Breaker Test Jig“. In 2019 11th International Conference on Electrical and Electronics Engineering (ELECO). IEEE, 2019. http://dx.doi.org/10.23919/eleco47770.2019.8990527.

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Yu, Qiang, Hironobu Kikuchi, Keiji Watanabe, Masaki Siratori, Manabu Kakino und Noriyuki Fujiwara. „Impact Reliability Study of BGA Solder Joints and Dropping Test Method“. In ASME 2003 International Electronic Packaging Technical Conference and Exhibition. ASMEDC, 2003. http://dx.doi.org/10.1115/ipack2003-35139.

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The purpose of this study is to develop an assessment method for drop impact reliability of BGA solder joints. In this paper, the dynamic deformation behavior of PCB is examined to evaluate the dynamic fracture of solder joints, where a free fall drop-impact test was used, and explicit-based FEM code LSDYNA was used to study the basic behavior of the drop-impact test, and the effects of falling angle on the dynamic behavior of PCB were discussed. As a result, it was confirmed even if collision angle is very small, the dynamic deformation of PCB was drastically affected by the collision angle. In this study, the authors proposed that the dynamic behavior can dramatically be improved by attaching a hemisphere on the jig bottom to obtain stable dynamic deformation of the PCB. Furthermore, in case of that the PCB flexural rigidity was changed, the optimal test jig was designed so that the PCB and the jig for a drop test might not cause resonance vibration. Generally, the crack growing assessment and drop impact strength evaluation for solder joints were studied by a fine meshing FEM model, nevertheless it causes a rapid augmentation of calculation cost. In this study, the authors proposed a new method of transient response analysis by utilizing implicit based FEM analysis code to drop the calculation cost of impact study. It was shown that the present method can accurately simulate the dynamic behavior of BGA packaging including the time histories of the deformations and stresses, and it can drop the CPU time to about one tenth of that of explicit based analysis code.

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Terada, Susumu, und Kenji Yamamoto. „Mean Stress Correction Procedure in Fatigue Evaluation for High Pressure Vessels“. In ASME/JSME 2004 Pressure Vessels and Piping Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/pvp2004-2275.

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One important issue in the fatigue evaluation that must be addressed is the mean stress correction procedure. ASME Div.3 is provided with the mean stress correction procedure. The predicted equivalent alternating stress intensities Seq are compared with the experimental results for push-pull fatigue tests with mean stress for JIS SCM440 and JIS SUS630 H1075. Seq per ASME Div.3 are not coincident with the experimental results. In case of high ratio of tensile mean stress to tensile strength, the difference becomes large and it is un-conservative. On the other hand Seq per KHK Standard are coincident with experimental results. The fatigue test results for pressurized cylinder tube by Davidson and Findley are also compared with predicted values per ASME Div.3 and KHK Standard. The results of comparison are same as that for above mentioned push-pull fatigue tests. Based on the experimental verification, the authors recommend that the mean stress correction procedure per KHK Standard be implemented in ASME Div.3.

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Yamabe, Junichiro, Tohru Awane, Osamu Takakuwa und Saburo Matsuoka. „Hydrogen-Assisted Degradation of High-Strength Stainless Steel With a Newly Developed Aluminum-Based Coating in High-Pressure Hydrogen Gas Environment“. In ASME 2017 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/pvp2017-65542.

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The paper presents the hydrogen-entry, tensile, and fatigue properties of a precipitation-hardened martensitic stainless steel, JIS-SUS630, with a newly developed coating, whose thickness ranges from 10 to 20 μm. The newly developed coating consists of alumina, aluminum, and ferroaluminum, and has an excellent resistance to hydrogen entry in 100-MPa hydrogen gas at 270°C. The hydrogen entry in the coated specimen occurred under a diffusion-controlled process and the effective hydrogen diffusivity was approximately one thousandth of that of the base steel. Although the hydrogen diffusivity of JIS-SUS630 was two orders of magnitude larger than that of JIS-SUS304, the effective hydrogen diffusivity of the coated JIS-SUS630 was nearly equal to that of the coated SUS304. In our previous study with secondary-mass ion spectroscopy (SIMS), the coating’s excellent resistance to hydrogen entry was attributed to interfacial hydrogen trapping between the aluminum and ferroaluminum layers. The experimental result obtained in this study suggested that the excellent resistance to hydrogen entry demonstrated by the developed coating can be attributed to the reduction in the permeation area induced by the interfacial trapping of hydrogen. The tensile tests of a smooth, round-bar specimen and fatigue tests of a circumferentially notched specimen with exposure to 100-MPa hydrogen gas at 270°C were performed in air at room temperature (RT). The test results showed that the tensile and fatigue properties of the coated specimens were not degraded by hydrogen exposure, whereas those for the non-coated specimens were significantly degraded. Hydrogen-pressure cycle tests of the coated, tubular specimens with an inner notch were also carried out with 95-MPa hydrogen gas at 85°C, demonstrating that the fatigue life of the tubular specimen was improved by the developed coating.

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Kobayashi, Takashi, Kiichi Masui und Wong Teck Soon. „The Relationship Between Sealing Behavior of Gaskets and the Leak Tightness of Gasketed Bolted Flanged Connections“. In ASME 2009 Pressure Vessels and Piping Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/pvp2009-77633.

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With the recent increase of a safety and environmental concern, the tightness of gasketed flanged connections becomes an important issue. In estimating the tightness of gasketed flanged connections, the sealing behavior of gaskets must be known. Currently, methods to test the sealing behaviors have been established in the North America, Europe and Japan. However, the relationships between the gasket data and the tightness of gasketed flanged connections have not been examined systematically. This paper consists of two parts: gasket data concerning sealing behavior and tightness of gasketed flanged connections. Firstly, several sheet gaskets were tested based on the test method JIS B 2490 in order to grasp tightness of gaskets. Secondly, tightness tests were carried out using blind flanges with the tested gaskets by JIS B 2490. Both the results were compared and discussed to highlight the relationship between them. It is shown that the tightness of bolted flanged connections is largely affected by the sealing behavior of gaskets. Based on the results, a simplified method to estimate the tightness of flanged connections is proposed.

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Kim, Hyesoo, Shinyoung Park, Jonghoon Kim, Joungho Kim, Jung-Min Park, Un-Ho Kim und Yuck-Hwan Jeon. „Signal integrity analysis of a super speed pair of a USB 3.0 connector with test Jig“. In 2017 IEEE Electrical Design of Advanced Packaging and Systems Symposium (EDAPS). IEEE, 2017. http://dx.doi.org/10.1109/edaps.2017.8277031.

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Arai, Taku, Toshiari Saegusa und Roland Hueggenberg. „Recent Development of Code Case on Use of Ductile Cast Iron for Transport and Storage Cask for Spent Nuclear Fuel“. In ASME 2008 Pressure Vessels and Piping Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/pvp2008-61425.

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Code Case N-670 “Use of Ductile Cast Iron Conforming to ASTM A874/A 874M-98 or JIS G5504-1992 for Transport Containments, Section III, Division 3” which permits use of ductile cast iron for transport containments of spent nuclear fuel was revised to the Code Case N-670-1, “Use of Ductile Cast Iron Conforming to ASTM A874/A 874M-98 or JIS G5504-2005 for Transport and Storage Containments, Section III, Division 3”. Items revised were as follows: (a) Scope was expanded to use for transport and storage, and changed to conform year edition of JIS G5504, (b) The elongation requirement was deleted form the code case to reflect the change of year edition of JIS G5504, (c) Temperature condition of −40 °C was clearly provided for fracture toughness test, (d) Design fatigue curve was re-established, (e) External pressure chart was re-established. Technical basis of the revised code case are described in this paper.

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Wada, Yoru, Kouichi Takasawa, Ryoji Ishigaki, Yasuhiko Tanaka und Tadao Iwadate. „Measurement of Fatigue Crack Growth Rates for Steels in Hydrogen Storage“. In ASME 2009 Pressure Vessels and Piping Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/pvp2009-77666.

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Fatigue crack growth rates (da/dN) in up to 90MPa high-pressure gaseous hydrogen environments of quenched and tempered low alloy Cr-Mo steel: JIS-SCM435 with ultimate tensile strength level of 950MPa were measured utilizing a cycle, ranging from 0.3sec from 1000sec long with a road ratio R = 0.1. The longer cycle time tests (15sec to 1000sec per cycle) were conducted utilizing internal pressure test apparatus by utilizing cylinder (= CY) specimens, while shorter cycle (0.3sec to 25sec per cycle) tests were performed utilizing fatigue test machine using compact tension (= C(T)) specimens. Crack depth of CY specimens were measured by Time Of Flight Diffraction (TOFD) technique and the crack length of C(T) specimens were measured by compliance technique. Both C(T) and CY specimen showed accelerated sub-critical crack growth in gaseous hydrogen compared that in air or inert gas atmosphere. The effect of load ratio was also evaluated.

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Berichte der Organisationen zum Thema "Test jigs"

Abraham, B. M. Calorimeter Preamplifier Hybrid Circuit Test Jig. Office of Scientific and Technical Information (OSTI), April 1999. http://dx.doi.org/10.2172/1032094.

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