Tailor welded blank integral drawing forming device and method for large-scale curved surface part

Abstract

The invention discloses a tailor welded blank integral drawing forming device and a method for a large-scale curved surface part, relates to the tailor welded blank integral forming device and method, and the problem that in the prior art, fractures exist in tailor welded blank integral forming is solved. The tailor welded blank integral drawing forming device comprises a male die, a blank holder, a female die and a liquid filling chamber; the portion between the blank holder and the female die is used for containing an unequal thickness tailor welded blank; the profile of the male die is provided with a male die groove which is consistent with the shape of a thick wall area where a sheet metal weld joint is located, blank holder grooves which are consistent with the shape of the thick wall area where the sheet metal weld joint is located are formed in an inner hole of the blank holder and the lower surface of the blank holder simultaneously, and the male die groove and the blank holder grooves are used for preventing the portion, perpendicular to the direction of the weld joint, of the thick wall area from deforming; or female die grooves which are consistent with the shape of the thick wall area where the sheet metal weld joint is located are formed in the upper surface of the female die and an inner hole of the female die and used for preventing the portion, perpendicular to the direction of the weld joint, of the thick wall area from deforming. The invention further provides a tailor welded blank integral drawing forming method of the large-scale curved surface part through using the tailor welded blank integral drawing forming device. The tailor welded blank integral drawing forming device and the method for the large-scale curved surface part are used for filling liquid, drawing and forming for the unequal thickness and symmetrical tailor welded blank through adopting uniform strength bearing design.

Description

technical field [0001] The invention relates to an overall forming device and method for tailor welded blanks. Background technique [0002] Curved parts such as heads are widely used in petrochemical, aerospace and other fields. The diameter is generally more than 2000mm, and it is a large curved plate part. The existing manufacturing method is to manufacture the melon petal parts by deep drawing or drawing method, and then the melon petals are stitched and welded into spherical parts. Since such parts are usually combined with the barrel section to form a pressure vessel, the reliability and load-bearing capacity of the weld are highly required. At present, the existing forming method of block forming and then welding has the disadvantages of many weld seams, large degree of restraint, forced assembly and welding deformation are prone to high levels of welding residual stress, and low reliability under pressure conditions. At present, there is an urgent need to solve the...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that weld seams are cracked during the drawing process of tailor-welded blanks and large-scale tailor-welded blanks cannot be formed, the present invention provides a tailor-welded blank drawing method and device for large-scale curved surfaces to avoid deep-drawing The cracking of the weld seam during the process and the formation of large tailor-welded blank surface parts

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