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一、概况目前对除螺纹头外的圆截面拉伸试样,大多采用对开式夹具进行试验,对开式夹具的装固胎虽有圆柱形或球面(可自动对中)等等各种不同的形式和结构,但都避免不了操作麻烦这个缺点。为此我们对几种不同形式的夹具进行了分析和比较。 1.苏联噶噶林式小试样夹具这种夹具装换方便,试验时操作简捷。试样在夹具内受力对称,唯对中性较差,易造成附加应力。若应用于大试样,为保证夹具的强度和刚性,尺寸势必显得过大。 2.瑞士AMSLER公司生产的Mi-34型微
I. Overview At present, in addition to the thread outside the first round cross-section of the tensile specimens, most of the use of open fixture to test the open fixture mounted solid tires although cylindrical or spherical (which can be automatically) and so on Different forms and structures, but can not avoid the troublesome operation of this shortcoming. To this end, we analyzed and compared several different types of fixtures. 1. The Soviet Union Karigarin small sample fixture This fixture is easy to replace, easy to operate test. Specimens in the fixture within the force symmetry, only the less neutral, easy to cause additional stress. If applied to a large sample, in order to ensure the strength and rigidity of the fixture, the size is bound to appear too large. 2. Switzerland AMSLER Mi-34-type micro-produced