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新型杯突试验夹具在万能试验机上的应用 总被引:1,自引:0,他引:1
卢长城 《试验技术与试验机》2006,46(3):35-37
根据GB4156—84《金属杯突试验方法》,研制在伺服万能试验机或微机控制压力试验机上应用的杯突试验夹具。按规定在对试样周边施加10kN的夹紧力并在杯突冲头与试样接触后,试验机开始运行加载,根据压头冲压力衰减判断试样透光,以此判定杯突值。 相似文献
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根据GB 4156-84<金属杯突试验方法>,研制在伺服万能试验机或微机控制压力试验机上应用的杯突试验夹具.按规定在对试样周边施加10 kN的夹紧力并在杯突冲头与试样接触后,试验机开始运行加载,根据压头冲压力衰减判断试样透光,以此判定杯突值. 相似文献
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我厂生产的NYL—2000kN和NYL—500kN压力试验机,属于弹簧测力式液压试验机。每台机上使用两根大小不同的测力弹簧,以满足不同量程的需要。自生产试验机以来,测力弹簧一直由上海中国弹簧厂加工。因为试验压力较大,弹簧钢丝直径较粗。小的测力弹簧钢丝直径为12mm,大的为16mm。因此,需要热绕成形。根据图纸要求,测力弹簧合格率较低(仅伸长量 相似文献
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针对橡胶制品,设计了适应双层模具、双机组热压成型机的液压系统。液压系统采用比例流量压力复合阀,调速方便、压力稳定、冲击小,同时考虑真空、自重、双机干扰等因素,所设计的液压系统满足了热压成型机工作要求。 相似文献
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Yon-Kyu Park Min-Seok Kim Jong-Ho Kim Dae-Im Kang Hou-Keun Song 《Journal of Mechanical Science and Technology》2006,20(7):961-971
A deadweight force standard machine is a mechanical structure that generates force by subjecting deadweights to the local
gravitational field. The Korea Research Institute of Standards and Science (KRISS) developed and installed a 100 kN deadweight
force standard machine for national force standards. It can generate forces from 2 kN to 110 kN in increments of 1 kN. The
uncertainty of the force machine was estimated and declared as 2 × 10−5. This 100 kN deadweight force machine was compared with the 500 kN deadweight force standard machine at KRISS and the 20
kN and 50 kN deadweight force standard machines at the National Metrology Institute of Japan (NMIJ). The measurement results
showed good agreement between the deadweight force machines, and the accuracy level of the 100 kN deadweight force machine
was verified. 相似文献
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应用价值工程分析了液压机的功能,生产成本,求解功能,生产成本费用为最小的最佳效数,以优化液化机的设计,提高经济效益。 相似文献
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介绍180kN绞滩机技术改造项目和改造效果。重点阐述技术改造的关键环节,并介绍一种新型轴承材料———VESCONITE(凡事可)的应用。 相似文献
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从曲柄压力机的噪声出发,通过对曲柄压力机空运转噪声、冲裁噪声的控制分析,说明静音冲裁是降低工作噪声最行之有效的方法。并经实例进行效果验证,成效明显。 相似文献
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《Measurement》2007,40(7-8):754-761
A comparison in the quantity of force was carried out among the Interamerican Metrology System (SIM) national laboratories in order to estimate the level of agreement for the realization of the quantity and the uncertainty associated to its measurement. This comparison was carried out up to 10 kN. The equipment used consisted on two force transducers (load cells); both with the same measuring range (10 kN). With the purpose of obtaining maximum accuracy on the transducers, the comparison range was selected from 4 kN up to 10 kN. This comparison (SIM comparison number SIM 7.7) has an overlap with the force steps used in the CIPM key comparison CCM.F-K1.a and CCM.F-K1.b. The results obtained, as well as the reference values selected for the comparison are included in this document. Two different methods were used to analyze the level of agreement and to state the conformity declaration. 相似文献