反复弯曲试验指标是金属线材标准和金属线材制品标准中常见的一项检测指标,比扭转和缠绕试验做得更多。但现在的弯折试验机,不同程度的存在以下问题: 1 机体的刚性以致强度不够,在正常操作中,由于活动钳口顶推丝杆的受力常使底座破裂,造成整机报废。 2 有的试验机拨孔中心和钳口中心不同轴,加上刚性不够,试样难以夹紧,影响检测结果。 3 张拉簧过小,例如7—1型手动弯折试验机的最 Repeated bending test indicators are metal wire standard and metal wire products standard common test indicators, more than the torsion and winding test to do more. But now the bending test machine, in varying degrees, has the following problems: 1 The rigidity of the body is not enough. In normal operation, the base is ruptured due to the force of pushing the screw rod by the movable jaw to cause the complete machine to be scrapped. 2 Some test machine dial center hole and the jaw center is not coaxial, coupled with rigidity is not enough, the sample is difficult to clamp, affecting the test results. 3 tension spring is too small, such as 7-1 type manual bending test machine most