Method for forming thin-walled parts through stamping and drawing

Abstract

The invention discloses a method for forming thin-walled parts through stamping and drawing, which is used for reducing the thicknesses (0.4-2mm) of raw materials to 50-100% of the original thicknesses the raw materials; the raw materials comprise magnesium alloys, aluminum alloys, titanium alloys, high temperature alloys and complex splice-welded plates; and the method specifically comprises the following steps that: a flexible forming technique is adopted with the aid of moulds and a hydraulic machine, wherein the moulds are in concave-convex fit with the hydraulic machine; upper and lower blank holders and concave and convex moulds are respectively subjected to hydraulic pressure exertion control; the nominal pressure of a main hydraulic cylinder exerted on the concave and convex moulds is 25000-4500 KN, and the nominal pressure of a side-pressing hydraulic cylinder accounts for 50-67% of the nominal pressure of the main hydraulic cylinder; and the maximum operating pressure of a liquid chamber is 150MPa. By using the method disclosed by the invention, an expected effect is obtained, and the qualification rates and efficiencies of parts are obviously improved; and meanwhile, the hydroforming technology fills in the gaps in industry application, and lays a solid foundation for the thorough solving of technical bottlenecks existing in actuating cylinder cover forming and the research and preparation of future novel thin-wall parts and sheet metal forming parts.

Description

Technical field: [0001] The invention relates to the technical field of stamping and forming, and in particular provides a method for stamping and stretching thin-walled parts. Background technique: [0002] In the prior art, sheet metal forming plays a very important role. With the development of modern industry, people have higher and higher requirements for the quality and appearance of sheet metal forming parts, which greatly increases the complexity of forming parts. For some plate parts with complex shapes, when the traditional stamping method is used to form, defects such as wrinkling, cracking and springback often occur during the forming process, which seriously affect the quality of the formed parts, and the main method to solve such problems is to rely on craftsmen The mold is trimmed with advanced experience and intuition, and the forming quality is ensured through trial and error debugging. This not only consumes a lot of manpower and material resources, but a...

AI Technical Summary

Problems solved by technology

In the prior art, the processing has always been done on a 4000KN hydraulic press, and sheet metal workers cooperate with manual knocking and repairing. Each part has to be formed and knocked on repeatedly. In this way, there are still dead wrinkles and cracks on the surface of the processed parts. and other defects, poor surface quality, low pass rate, low efficiency, long time occupation of equipment, seriously affecting the smooth progress of production

Images