Three Common Problems in Stretching Cone Parts of Lampshade

In general, when using a ceiling lamp shade machine to stretch a cone, you will find that the stretching of the cone is much more difficult than the stretching of a cylindrical part. Moreover, the following three problems easily occur during stretching:

1. At the beginning, the contact area between the punch and the billet is small, the pressure is concentrated, and the contact part of the metal is thin and even cracked.

2. The free area between the male and female molds is large. This part of the metal is prone to wrinkling.

3, after stretching, the parts rebound large, not easy to get the size of the precise parts.

Therefore, in the use of ceiling lamp shade machine for thin-wall deep-cone stretching forming, due to a large degree of deformation of the billet, only the contact area of the billet and the punch area transfer deformation force can easily cause local over-thinning and rupture of the billet, so generally Need to go through multiple process stretching.