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本文对通常采用的“恒载荷”测量方案与GLP—1型试验机采用的“恒变形”测量方案作了分析比较。阐述了该试验机载荷测量方案的特点及载荷计算方法。讨论了光学测量装置的设计问题与制造调整中的问题。文中对应力误差因素进行了逐个分析。介绍了动载荷精度的检查方法及结果。讨论了提高试验机应力精度的问题。 GLP—1型高温真空拉压疲劳试验机可作棒材和板材试件的对称与不对称应力拉压疲劳试验。最大交变载荷为±1000公斤,机器动载荷精度在6％范围内;工作频率为100～400/Hz工作温度为800～1300℃;控温精度为0.5％;试件均热带在10mm长度内温差为10℃以内;真空度为5×10~(-5)mmHg。 试验机由主机、高温真空炉和电气控制三大部分组成。图1为试验机全貌。图2为试验机工作示意图。 本文将主要讨论本试验机的载荷测量与应力精度问题。有关本机的其他方面的问题可参阅有关资料[1]。
This paper analyzes the commonly used “constant load” measurement scheme and the “constant deformation” measurement scheme adopted by the GLP-1 testing machine. The characteristics of load testing scheme and the calculation method of load are described. The design problems of optical measuring devices and the problems of manufacturing adjustment are discussed. In this paper, the stress error factors were analyzed one by one. The inspection methods and results of dynamic load accuracy are introduced. The problem of improving the stress accuracy of the testing machine is discussed. GLP-1 high-temperature vacuum tension and compression fatigue testing machine can be used for bar and plate specimens of symmetrical and asymmetric stress tension fatigue test. The maximum alternating load is ± 1000 kg and the dynamic load of the machine is within 6%; the operating frequency is 100-400 / Hz; the operating temperature is 800-1300 ℃; the temperature control accuracy is 0.5%; the test pieces are all tropical within 10mm length The temperature difference is within 10 ℃; the degree of vacuum is 5 × 10 ~ (-5) mmHg. Testing machine from the host, high temperature vacuum furnace and electrical control of three major components. Figure 1 for the test machine picture. Figure 2 shows the working sketch of the testing machine. This article will mainly discuss the test machine load measurement and stress accuracy issues. Other aspects of this machine can refer to the relevant information [1].