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按GB232-65《金属冷热弯曲试验法》进行工艺性能试验的板、带材,大多数要求试样绕着弯心弯到两面平行,即弯曲180°,弯心直径d等于试样厚度a的n倍.由于金属板、带材的厚度不同,则弯心直径d也不同.由此可见,进行不同板、带材的弯曲试验,必须备有大量的弯心直径不同的专用弯心.就此,我们在原有专用弯心(d=10、20毫米两种弯心)的基础上,制作了冷弯试验的简易弯心(见图),以加工简便的U型弯心代替了原来应加工的专用弯心.(注:不
According to GB232-65 “metal hot and cold bending test method” for the performance test plate, strip, most of the requirements of the sample around the curved curved to both sides of the parallel, that is, bending 180 °, the bending diameter d is equal to the sample thickness a Of n times .Because of the different thickness of the metal plate, strip, then the diameter of the curved heart d is also different from. Thus, the bending test of different plates, strips must be equipped with a large number of different curved center of the heart diameter. In this regard, we have made a simple bending test of the cold bend (see Figure) on the basis of the original dedicated curved heart (d = 10,20 mm two crooks), to replace the original should be simple U-shaped curved heart Processing of special curved. (Note: No.