Device for reducing friction of guided region when forming high pressure in pipe

Abstract

The invention relates to a device for reducing guiding zone friction in high pressure formation of tubular material. It comprises dies, left punch head, right punch head, right round body on the right end face of the left punch head with right guiding ring slot, so does the right punch head, with gaps between the die, left punch head and the right punch head. It can eliminate the high touch pressure zone of the tubular end and the die guiding zone inner wall, reducing the friction resistance to improve production efficiency and die durability, and lowered requirement for tonnage.

Description

technical field [0001] The invention relates to hydroforming equipment for hollow parts, in particular to an internal high-pressure forming device for pipes. Background technique [0002] At present, in the fields of aircraft and automobiles, hollow parts can not only reduce weight, save materials, and reduce energy consumption during operation, but also ensure the strength and rigidity of structural parts. Therefore, hollow parts are widely used for components that are mainly subjected to bending and torsional loads. Tube high pressure forming is an advanced method for producing hollow variable cross-section lightweight structural parts. For example, the publication date is April 25, 2001, and the Chinese utility model patent whose notification number is CN2427399YA discloses such a kind of hydroforming equipment for hollow parts. The process is realized in this way: first put the pipe blank into the mold, and then use the vertical press to clamp the mold; the hydraulic p...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems that the guide area of ​​the existing guide and sealing method has large friction, which makes the pipe easy to thin and crack, the guide area wears seriously, and the overall service life of the mold is reduced. The device of guiding area friction, it comprises mold 8, left punch 7 and right punch 9, and described mold 8 is made up of upper mold 1 and lower mold 2 and upper mold 1 and lower mold 2 jointly combine molding cavity 10, mold 8 The left end of the left end is provided with the left guide hole 16 that communicates with cavity 10, and the right end is provided with the right guide hole 17 that communicates with cavity 10, and the axis of left punch 7, right punch 9 coincides with the axis of mold 8, and the axis of right punch The inside of the head 9 is provided with a liquid inlet hole 5, the left guide hole 16 and the right guide hole 17 of the mold 8 are counterbores, the right end center of the left punch 7 is provided with a right circular table body 11 and a right guide ring is provided at the root of the right circular table body 11 Groove 12, the left end center of right punch 9 is provided with left round table body 22 and left round table body 22 roots have left guide ring groove 4, and the right end of left punch 7 is installed in the left guide hole 16, and the outside of left punch 7 The cylindrical side wall is in clearance fit with the left guide hole 16, the left end of the right punch 9 is installed in the right guide hole 17, and the outer cylindrical side wall of the right punch 9 is in clearance fit with the right guide hole 17 of the mold 8

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