Mengcun butt head plant, the butt weld head plant http://www.hebftc.com/ phone 0317-8210122, mobile phone 13722724665 elliptical head size the importance of the accuracy of its use does not require high precision, in the face The surface of the junction has a rounded transition. Thus, the parts can be obtained by drawing, flanging forming, and does not need to be trimmed to the internal. Through the above process analysis, combined with traditional work arrangements and the mold structure, we have adopted a new process scheme: blanking - drawing - punching - flanging, four composite mold process time stamping.