一种简单常用的小螺孔翻边模,因其制件材料是被凸模工作时撕破后继而翻边的;由于撕裂是在自由状态下进行,所以常发现翻边底面高低不平较明显,裂纹的长短大小不一、壁部变薄不匀,仔细观察可以发现低的地方变薄过多且不垂直。在零件的转角处塌角R值较大,这是因为凸模尖端工作时处于大间隙拉延状态,工件端口塌角R自然形成较大,以后就不 A simple and commonly used small screw flanging die, because the workpiece material is to be torn when working punch punch flanging; Since the tear is carried out in a free state, it is often found that the underside of the burr Obviously, the length of the crack varies in size, wall uneven, careful observation can be found in the low places too thin and not vertical. The corner of the parts in the collapse of R value is larger, it is because the punch tip work in a large gap drawing state, the workpiece port collapse R naturally formed larger, not after