Thermoforming and hole-punching integrated technique and mold of high-duty steel part

Abstract

The invention provides an integrative process and a die for hot forming and punching of a high-strength steel part. The integrative process comprises the following steps: providing a punching tool on the hot forming die for the high-strength steel part; before punching and forming a high-strength steel plate, putting the heated fully austenized high-strength steel plate into the hot forming die for punching; and after closing the hot forming die, utilizing the punching tool on the hot forming die to carry out punching operation for a punched work piece. The integrative die comprises an upper die, a lower die, an upper punching tool and a lower punching tool, wherein the upper end of the upper die is provided with an upper die oil cylinder, a piston rod of the upper die cylinder is connected with the upper punching tool through a post rod, the lower end of the lower die is provided with a lower die cylinder, and a piston rod of the lower die oil cylinder is connected with the lower punching tool. The process and the die reduce equipment investment and production cost for hot forming, shorten production period, and have high punching quality, and high dimension precision and shape precision of parts.

Description

technical field [0001] The invention relates to hot stamping forming and punching technology and dies of high-strength steel, advanced high-strength steel and ultra-high-strength steel stamping parts, and belongs to the technical field of forming high-strength steel plate metal parts. Background technique [0002] At present, in the field of automobile manufacturing, people's demand for high safety, low dead weight and good fuel economy has become an important driving factor for technological progress. Manufacturers are making consumers' wishes come true by introducing new safety concepts and lightweight body structures. Especially in terms of body structure, through the use of high-strength steel, advanced high-strength steel and ultra-high-strength steel, the crash performance of the car is improved and the requirement of lightweight is also achieved. However, with the increase of steel strength, the elongation rate decreases, and the formability of the material is also g...

AI Technical Summary

Problems solved by technology

[0008] Chinese patent document CN2617549 discloses a "new hot punching and trimming die", which is used for hot punching and trimming dies for forgings. The die disclosed in this patent can only use the slide block movement of the press to complete a single Punching, trimming, but not for forming, trimming or punching composite, in addition, the mold structure is used for steel block forging, which belongs to the field of volume forming, and cannot be used for high-strength sheet metal belonging to the field of sheet metal forming punching or trimming

This process and structure are only suitable for low-strength steel plates that are hydraulically bulging, and cannot be used for forming and punching high-strength steel parts

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