轮网锁是汽车轮胎防盗专用零件。目前国内很多厂家采用冷挤工艺生产这种零件。由于轮网锁的花型各异,壁厚只有3.5mm,深度为7mm,中心又有凸台,并且轮网锁凹凸配合(图1)。在冷挤过程中,其花型凸模很容易折断,我单位挤冲5000个轮锁,就耗用了60根凸模,批量生产受到影响,同时产品成本提高。 为此,我们分析其中原因,归结为以下三大问题: 1)250吨冲床滑块与导轨间隙过大,冲头与机床 Wheel Lock is a car tire anti-theft parts. At present, many domestic manufacturers cold extrusion process to produce such parts. As the wheel lock patterns vary, the wall thickness of only 3.5mm, depth of 7mm, the center has a boss, and the wheel lock with convex and concave (Figure 1). In the cold extrusion process, its pattern punch is very easy to break, my unit squeeze 5,000 wheel locks, it takes 60 punch, mass production is affected, while product costs increase. To this end, we analyze the reasons, attributed to the following three issues: 1) 250 tons of punch slider and rail clearance is too large, punch and machine tool