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Resilience control method for moulding top surface of car roof

A control method and springback technology, applied in vehicle parts, forming tools, manufacturing tools, etc., can solve problems such as difficult control

Active Publication Date: 2009-10-07
SAIC VOLKSWAGEN AUTOMOTIVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to effectively control the size of the two parts when only one set of molds with surface correction is used to stamp the two parts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] In a preferred embodiment of the present invention, the method for controlling the springback of the roof top profile is used in the method for manufacturing a full roof and a roof with a sunroof by using a roof mold described in the background art. First of all, the method of using the roof mold to manufacture the roof still includes in sequence: process 1, using the drawing die to stretch the full roof workpiece or the roof workpiece with sunroof; process 2, using the trimming die to stretch the full roof workpiece Or trimming around the workpiece of the roof with sunroof; process 3, use the flanging die to flang the workpiece with the full roof or the workpiece with the roof of the sunroof; process 4, use the flanging die to trim the workpiece with the full roof or the car with The two sides of the top workpiece are flanged again; in process 5, use the flanging die to flang the front and rear of the full roof workpiece again, or use the flanging die to flang the front...

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Abstract

The invention relates to a resilience control method for the moulding top surface of a car roof. The method is used in the process of punching and forming a set of moulds of a full car roof and a skylight car roof, and includes the step of respectively punching a full car roof workpiece and a skylight car roof workpiece by selecting the common mould by N steps of working procedures, N is an integer larger than zero, the moulding surface of a mould core of the common mould is a first compensation moulding surface, and the shape of the first compensation moulding surface is identical with the shape of a punched moulding surface in any working procedure in the N steps of working procedures of punching the full car roof workpiece and the skylight car roof workpiece before resilience; and after the N steps of punching working procedures are accomplished, at least one mould core and one stripper plate of the mould are replaced, a new mould core and a new stripper plate are used for punching the skylight car roof workpiece by M steps of working procedures after replacement, M is an integer larger than zero, and the resilience volume of the skylight car roof workpiece is different from the resilience volume in the N steps of punching working procedures.

Description

technical field [0001] The invention relates to a springback control method of the top profile of a full roof or a roof with a sunroof in a stamping process. Background technique [0002] Springback is one of the important factors that cause the size of the car panel to be out of tolerance, and its principle is the elastic deformation recovery of the plate. At present, the treatment of the springback problem of the outer cover mainly depends on the comparative measurement of the stamping part and the inspection tool after the mold test, and corrects the mold surface according to the deviation, so that the stamping part is over-shaped, and the law of springback is used to make the The shape after unloading is consistent with or close to the desired shape. In other words, if the mold surface is made directly according to the product data, the parts that meet the tolerance requirements cannot be obtained. The mold surface must be compensated on the basis of the product data to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D37/10B21D37/12B21D53/88B21D35/00B21D22/20B21D28/02B21D19/00
Inventor 刘罡唐毓明
Owner SAIC VOLKSWAGEN AUTOMOTIVE CO LTD
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