在冰箱、空调等制冷设备修理中,经常有铝管和铜管要弯曲。由于管材在弯曲过程中易产生扁口(弯曲角度较大时,扁口现象特别严重,甚至产生死口),影响系统制冷;在扁口处,由于材料老化、设备振动(冲击碰撞)等原因,还易出现裂纹,引起泄漏故障。为了避免管子变瘪,我们制作了一种用于φ30mm 以下的管材弯曲用的工具。这个弯管工具实际上就是去掉两端挂钩的拉伸弹簧,其构思巧妙,使用效果很好。1.主要参数选择(1)拉簧内径按管材外径的公称直径决定。(2)弹簧钢丝材料及直径选用普通碳素弹簧钢丝。其直径d=K·D,K—系数,取0.08～0.12。管材直径大的选小值,直径小的选大值。(3)拉簧长度可根据弯管的需要,任意选择。 In the refrigerator, air conditioning and other refrigeration equipment repair, often have aluminum and brass to be bent. As the pipe is easy to produce in the process of bending flat mouth (bending angle is relatively large, flat mouth phenomenon is particularly serious, or even produce dead mouth), affecting the system cooling; in the flat mouth, due to material aging, equipment vibration (impact collision) , But also prone to cracks, causing leakage failure. In order to avoid the tube becoming deflated, we made a tool for the bending of pipes below φ30mm. The elbow tool is actually removed from the hook at both ends of the extension spring, its clever idea, the use of good results. 1. The main parameters of choice (1) tension spring pipe diameter according to the nominal diameter of the decision. (2) spring steel wire diameter and the use of ordinary carbon steel spring wire. Its diameter d = K · D, K-factor, take 0.08 ~ 0.12. Large selection of small pipe diameter, small diameter of the selected large value. (3) the length of the spring can be bent according to the needs of any choice.