在焊接夹具中,经常用到一种钩形夹管器(以下简称夹管器),该夹管器的支座是通过螺栓、销钉固定在夹具体上的。使用时只要将一根直的钢管一端定位好,用两个夹管器就能将钢管定位夹紧(见图1)。在生产中,如果遇上要定位夹紧一根经过弯曲的钢管,情况就不完全一样了,此时必须在弯管角度的两侧都安排有夹管器。在这种情 In the welding fixture, often a hook-shaped gripper (hereinafter referred to as the gripper), the holder is through the bolt, pin fixed to the clamp body. Just use a straight steel pipe positioned at one end, with two clamps will be able to position the steel clamp (see Figure 1). In production, the situation is not exactly the same if a bent steel pipe is to be clamped and positioned, in which case a pinch must be arranged on both sides of the bend angle. In this situation