A die structure for plate springback experiments that can switch between multiple stamping processes

Abstract

The invention relates to a mold structure for plate springback experiments that can realize switching of various stamping processes. The mold structure is arranged up and down by an upper mold and a lower mold; the upper mold includes an upper mold base, an upper mold pressing plate, and a concave mold insert; The two die inserts are symmetrically fixed on the left and right sides of the center of the lower end of the upper die base. Block, lower die insert, punch; two lower die inserts are symmetrically fixed on the upper end of the blank holder ring on the left and right sides of the punch; the punch is fixed on the bottom plate of the punch, and the punch and the punch insert are fixedly connected; the punch The insert is set coaxially with the pressing plate of the upper die, and the blank holder can be lifted up by the machine; the mold structure is drawn and formed through the relative movement between the pressing plate of the upper die and the insert of the punch die, and the insert of the die and the insert of the lower die Or flanging stamped sheet. The invention uses a set of mold structure to realize the stamping springback experiment of plates with different thicknesses by three processes of drawing, forming and flanging.

Description

technical field [0001] The invention relates to a mold structure for a plate springback test, in particular to a mold structure for a plate springback test that can realize switching of various stamping processes. Background technique [0002] In actual engineering, plates usually require one or more stamping processes such as drawing, forming, flanging, and shaping to obtain complete parts. However, in today's actual stamping production process, most plate stampings have certain springback problems. Among them, the springback problem of high-strength steel plates is more serious. Due to the Bauschinger characteristics, high strength, large flow stress, and low hardening index, this type of plate tends to produce greater springback when it is cold stamped. [0003] At present, through the stamping springback experiment on the plate, the springback law is analyzed, so as to solve the springback problem in actual production. For example, the international standard conference ...

AI Technical Summary

Problems solved by technology

If a set of corresponding molds is designed for each stamping process, it will increase the cost of mold design and manufacturing, resulting in waste of resources, and at the same time prolong the total cycle of mold processing and manufacturing; The rebound test is difficult, resulting in a long test cycle and low efficiency; finally, the application of multiple sets of molds is likely to cause accuracy problems in the test results, resulting in certain errors

Images