数控高速锯床加工H型钢拉伸试样的程序段设计及试验结果

Program Segment Design and Test Result of H-beam Tensile Sample Processed by Numerical Control High Speed Sawing Machine

为使D-450H型数控高速锯床满足H型钢拉伸试样的加工要求,对该型数控高速锯床的程序段进行设计,并对加工出的H型钢拉伸试样的试验结果进行对比验证试验。结果表明:采用经过程序段设计的数控高速锯床加工出的H型钢拉伸试样在拉伸试验时基本不会发生应变强化;试样尺寸及形状公差均满足标准要求;抗拉强度、屈服强度及断后伸长率与鳄鱼剪剪切试样的基本一致,但其表面粗糙度更小,平均值仅为0.61μm,且精度较高。

In order to make D-450 H numerical control high-speed sawing machine meet the processing requirements of H-beam tensile sample, the program segment of numerical control high-speed sawing machine was designed, the test results of H-beam tensile sample processed by numerical control high-speed sawing machine were compared and verified. The results show that the tensile sample of H-beam processed by numerical control high-speed sawing machine with program segment design basically does not have strain strengthening during tensile test. The dimension and shape tolerance of sample meet the standard requirements. The tensile strength, yield strength and elongation after fracture are basically the same as those of crocodile shear samples, but the surface roughness is smaller, the average value is only 0.61 μm, and the accuracy is high.