Pre-bending tool for rear door hemming of car body in white and use method of tool

Abstract

The invention discloses a pre-bending tool for rear door hemming of a car body in white and a use method of the tool. The tool comprises a support stand pillar, a hemming lower die arranged on the support stand pillar, a four-bar mechanism and a drive mechanism, wherein the four-bar mechanism comprises a hemming pressing arm, a first connecting arm, a second connecting arm and a hemming arm corner seat, and a first end of the hemming pressing arm is hinged with a first end of the first connecting arm; the neighbouring part of the middle of the first connecting arm is hinged with the hemming arm corner seat; a second end of the hemming pressing arm is hinged with a first end of the second connecting arm; a second end of the second connecting arm is hinged with the hemming arm corner seat, and the hemming pressing arm, the first connecting arm, the second connecting arm and the hemming arm corner seat define a quadrangle; a pressing arm bulging outwards is further arranged on the hemming pressing arm, and a hemming upper die matched with the hemming lower die is arranged on the pressing arm; the drive mechanism drives the second end of the first connecting arm to move, a rear door is pre-bent by a large angle about 30 degrees and then conveyed to a press fit die for press fit, the cost is reduced, and the hemming efficiency and quality are improved.

Description

technical field [0001] The invention belongs to the technical field of automobile manufacturing, and in particular relates to a pre-bending tool for wrapping the rear door of a body in white and a use method thereof. Background technique [0002] Automobile is an important means of transportation and a symbol of the level of technological development. The automobile industry plays a particularly important role in the world's manufacturing industry. Due to the large scale of production, the high concentration of capital and technology, and its strong economic and radiation-driven effects, the automobile industry plays a pivotal role in the machinery manufacturing industry. . All industrialized countries in the world regard the automobile industry as the pillar industry of the national economy without exception. The research and development, production and sales of automobiles are closely related to many sectors of the national economy, and play an important role in promoting...

AI Technical Summary

Problems solved by technology

[0010] In the process of realizing the present invention, the inventors found that there are at least the following problems in the prior art: with the increase of modeling difficulty, it is difficult to meet the requirements of one-time sealing for large-angle sealing dies. The edge angle is less than 130°. The solution generally adopted for large-angle hemming is to solve the problem of large-angle hemming in the form of two sets of pressing molds side by side. The cost is relatively high, and it is also limited by the layout of the factory building, so it is difficult to realize.

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