风罩 This item was sourced on www.MFG.com as one of the items in an RFQ in CHINA for Punching 风罩的生产 (冲切). 请参阅图纸了解所有规格。 Part Part Number: 4 Material: Carbon Steel Material Grade: Technical Specifications Category:Punching Dimensions0.0 x 0.0 mm Annual Usage:1000.0 The following suppliers (machine shops, fabricators, casters, molders, 3D printing, CNC machining, etc.) provide manufacturing services and are members of the MFG.com community. For more information visit http://www.mfg.com. MFG.com performs a 5-point inspection on all engineered parts and RFQs to ensure quality and enhance your quoting experience Punching: Punching is a fabricating process in which a steel tool, called a punch, is forced into sheet metal, forcing it to compress or release into a bottom die. Forming punches compress the sheet metal into the shape of the bottom die to create the desired contour. Hole, slot and notch punches are used to cut holes in sheet metal by shearing the metal into a hollow die, where the excess metal drops to the bottom and is collected.