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Causes and methods of wrinkling of metal stretched parts

by:Fortuna     2021-03-07
Stamping parts are relatively common metal processing products in industrial production, while metal drawing parts are stamping parts with relatively technical content. In the process of product stretching, the stretched parts will have problems such as wrinkles, cracks, uneven thickness, shape distortion, rebound, and surface scratches. This article introduces the causes and methods of wrinkling of stretched parts. Wrinkling of the stretched part means that the surface of the workpiece is rough and uneven and the edge is too thick during the stretching process, which will seriously affect the subsequent work. There are many reasons for the wrinkling of stretched parts, mainly the following aspects: the thickness of the stretched blank, that is, the thickness of the plate, is naturally small, and the pressure that can withstand is naturally small, and it is extremely easy to wrinkle during the stretching process; The coefficient is small, and the corresponding stretching coefficient is not selected according to the texture of each blank. The degree of deformation is difficult to control. If the control is not good, deformation will occur; the blank holder has been seriously damaged, and the same pressure cannot be applied to the blank. Uneven pressure capacity can also cause wrinkles. The thickness of the stretched blank should be relatively thick, so that it can withstand relative pressure during the stretching process, and is not easy to deform and wrinkle; select the stretch coefficient corresponding to the texture of the blank, and the degree of deformation is easy to control; The side ring needs to be replaced or repaired frequently, so that the pressure on the blank is equal, and it is not prone to wrinkles. [Related recommendation] Learn more: What are the methods for polishing the surface of stainless steel? Learn more: Manufacturing characteristics of automobile stamping parts molds Learn more: Points to note in the design of continuous stamping dies (2)
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