Die closing press applied to forming and production of internal high pressure and internal high pressure forming process

Abstract

The invention discloses a die closing press applied to forming and production of internal high pressure and an internal high pressure forming process and relates to the technical field of forming and manufacturing of pipes. The die closing press comprises a die, wherein the die comprises an upper die and a lower die which are matched with each other; pipe blanks are placed between the upper die and the lower die; the die is divided into a plurality of areas; the die applies total die closing force through a main cylinder and a side cylinder; and the total die closing force generated by the main cylinder and the side cylinder and the die opening force borne by the die and generated by forming the pipe blanks are constant in difference and consistent in direction. The die closing press is wide in application ranges of produced parts; the problem of unbalance loading of the die closing press in forming and production of internal high pressure of multiple parts is effectively solved; the deformation of the die is reduced; the service life of the die is effectively prolonged; the size accuracy of the parts is improved; and the qualification rate of products is increased.

Description

technical field [0001] The invention relates to the technical field of pipe forming and manufacturing, in particular to a clamping press suitable for internal high pressure forming production and an internal high pressure forming process. Background technique [0002] Automobile lightweight is the most direct and effective way to realize automobile energy saving and emission reduction. One of the main ways to achieve lightweight is to design the component structure as a hollow variable cross-section structure. Internal high pressure forming is an advanced technology for manufacturing hollow variable cross-section components. It has the advantages of light weight, good integrity, high stiffness and fatigue performance, and has been widely used in the production of automotive lightweight components, such as chassis, body and exhaust pipe fittings. [0003] The internal high pressure forming technology uses the fluid pressure to act on the inside of the tube blank, so that the...

AI Technical Summary

Problems solved by technology

[0008] At present, the control cylinder layout mode of conventional mold clamping presses used for internal high pressure forming adopts a single or single axis layout, while the mold clamping force loading mode uses all control cylinders to be simultaneously loaded with the same pressure, that is, the mold clamping force loading center of the slider is always the slider. The center of the block, so the conventional clamping press cannot meet the above technical requirements

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