外文翻譯---模具成型軋制(完整版)
【正文】 ng of the mechanics of various forming operations, we shall briefly discuss each of these processes.Rolling In this process, the job is drawn by means of friction through a regulated opening between two powerdriven roll. The shape and size of the product are decided by the gap between the rolls and their contours. This is a very useful process for the production of sheet metal and various mon sections, ., rail, channel, angle, and round.Forging In forging, the material is squeezed between two or more dies to alter its shape and size. Depending on the situation, the dies may be open or closed.Drawing In this process, the crosssection of a wire or that of a bar or tube is reduced by pulling the workpiece through the conical orifice of a die. When high reduction is required, it may be necessary to perform the operation in several passes.Deep Drawing In deep drawing, a cupshaped product is obtained from a flat sheet metal with the help of a punch and a die. The sheet metal is held over the die by means of a blank holder to avoid defects in the product.BendingAs the name implies, this is a process of bending a metal sheet plastically to obtain the desired shape. This is achieved by a set of suitably designed punch and die. Extrusion This is a process basically similar to the closed die forming. But in this operation, the workpiece is pressed in a closed space, forcing the mat
黨政相關(guān)相關(guān)推薦
鄂ICP備17016276號-1