Metal powder hydraulic device capable of achieving double-face punch forming

Abstract

The metal powder hydraulic device comprises a rack, a feeding device, a forming device and a driving device, the forming device is fixedly connected with the rack, the feeding device is connected with the forming device, the driving device is connected with the forming device, the rack comprises a stand column, an upper cross beam is arranged at the upper end of the stand column, and a lower cross beam is arranged at the lower end of the stand column. The forming device comprises an upper die assembly, a lower die assembly and a middle die assembly, the upper die assembly and the lower die assembly are arranged in the space vertical direction, the lower die assembly comprises a guide seat, one side of the guide seat is fixedly connected with the end, away from the stand column, of the lower cross beam, a working cavity is formed in the guide seat, a guide groove is formed in the outer side of the working cavity, and the working cavity communicates with the guide groove. The middle mold assembly is arranged in the guide groove and comprises a middle mold, the middle mold comprises two mold petals, middle mold channels are formed in the mold petals, and the two middle mold channels form a mold cavity.

Description

technical field [0001] The invention relates to the technical field of hydroforming, in particular to a metal powder hydraulic device capable of double-sided stamping and forming. Background technique [0002] In recent years, with the continuous development of mechanical forming technology, in order to improve the production efficiency of enterprises, powder metallurgy technology has emerged as the times require. Powder metallurgy technology uses metal powder as the basic material, which is pressed into shape by a press and then sintered. Compared with conventional manufacturing technology, metal powder stamping technology reduces production time and improves enterprise production efficiency. However, with the continuous use of powder metallurgy forming technology, some disadvantages in the production process are gradually exposed. [0003] The metal powder molding process is a process in which the distance between the powders is gradually shortened and the densification pr...

AI Technical Summary

Problems solved by technology

Compared with conventional manufacturing technology, metal powder stamping technology reduces production time and improves enterprise production efficiency. However, with the continuous use of powder metallurgy forming technology, some disadvantages in the production process are gradually exposed.

[0003] The metal powder molding process is a process in which the distance between the powders is gradually shortened and the densification process is carried out. During the densification process of the metal powder, due to the size and shape of the metal powder are irregular, and there are gaps between the powder particles, when it is pressed by a press, it cannot Ensure uniform force on the metal powder, metal powder displacement and plastic deformation, mechanical interlocking through deformation, improve connection performance, press metal powder into a green compact with a certain shape and strength, but the green compact cracks during the powder metallurgy process The issue has been receiving much attention

[0004] Because there is friction between the particles or between the particles and the mold cavity, and the pressure generated by the pressing machine is much greater than the friction force, resulting in uneven friction force, so the metal powder mainly flows in a columnar form when it is pressed, due to the surface of the mold cavity Roughness restricts the movement of metal powder particles. The quality of the hydraulic press for single-side stamping is not high. The maximum density of the green compact for double-side stamping is at the edge of the green compact, which makes the degree of densification of the metal powder uneven, and the degree of densification at the edge High strength, high strength, low densification degree in the middle position, weak load impact resistance, once impacted during transit, cracks are likely to occur, affecting the quality of finished products

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