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钢筋冷弯试验一般在万能材料试验机上进行。但万能材料试验机出厂时,配备的冷弯试验冲头规格往往不齐全,不能满足试验需要。为了顺利进行冷弯试验工作,我们自制了一套冷弯冲头,满足了冷弯试验的需要。 1.冲头加工为适应进口钢筋冷弯试验时弯心直径大的需要,在原有弯心直径D=20、 40、60(mm)冲头的基础上,设计出弯心直径D=100mm(重8.7kg)、D=150mm(重12.2kg)、D=200mm(重15.5kg)的空心冲头(实心冲头加工较困难,重量大)。万能机空心冲头(图1)可与WI-100型万能材料试验机配合使用。
The cold bending test of steel bars is generally performed on a universal material testing machine. However, when the universal material testing machine is shipped from the factory, the specifications of the cold bending test punches are often not complete and cannot meet the test requirements. In order to carry out the cold bending test smoothly, we made a set of cold bending punches to meet the needs of the cold bending test. 1.Punch processing In order to meet the requirement of large bending center diameter for imported steel cold bending test, based on the original punch diameter D=20, 40, and 60 (mm) punches, the design of the bending center diameter D=100mm ( Hollow punches with a weight of 8.7 kg), D = 150 mm (weight 12.2 kg) and D = 200 mm (weight 15.5 kg) (solid punches are more difficult to process and weigh more). The universal hollow punch (Figure 1) can be used with the WI-100 universal material testing machine.