Forming device and method for high-precision hollow component

Abstract

The invention relates to a forming device and method for a precise hollow component with a rectangular section. The forming method includes that step 1, preparing a die, mounting an anti-deformation structure on the die, and mounting a check valve at a punch; step 2, placing an initial tube blank in a die cavity, closing the die and sealing the ends; step 3, filling the tube blank with fluid medium; step 4, enabling the anti-deformation mechanism to move in the opposite direction to form a micro-pedal shape; step 5, enabling the anti-deformation structure to return to the initial position to flat the concave part of the pedal shape; repeating the steps 4 and 5 to form the needed shape; relieving the inside fluid pressure, and opening the die to take out the component. According to the forming method for the high-precision hollow component, the die is provided with the anti-deformation mechanism to achieve the repeated and accumulative use of the pedal shape, the friction rolling effect is eliminated, the forming pressure is lowered, the disadvantage of break is avoided, the wall thickness uniformity is improved, and accordingly the high-precision requirements for the dimension precision and wall thickness uniformity of the high-precision hollow component used for the aerospace and other fields are satisfied.

Description

technical field [0001] The invention relates to the field of mechanical manufacturing, in particular to a high-precision hollow member forming device and method. Background technique [0002] At present, the rectangular section hollow member is an ideal load-bearing structure form. For bending and torsional loads, the rectangular section hollow member has the least failure mode, which can effectively balance the strength and stability failure problems, and then obtain the maximum ultimate bending and shear resistance. Bearing capacity, therefore, hollow members with rectangular cross-sections are important structural forms of aviation, aerospace and automotive equipment. [0003] In the current manufacturing process of rectangular cross-section hollow members, it is generally formed by stamping-welding and direct forming by internal high pressure. The first method introduces two longitudinal welds, which destroys the integrity of the structure and causes welding thermal ...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to address the above-mentioned defects in the prior art, and provide a high-precision hollow member forming device and method. By setting an anti-deformation mechanism in the mold, the repeated and cumulative utilization of the petal shape can be realized, and the fixed friction can be eliminated. At the same time, the rolling effect reduces the forming pressure, avoids the occurrence of cracking defects, and improves the uniformity of wall thickness, so as to meet the high-precision requirements for dimension accuracy and wall thickness uniformity of such components in aerospace and other fields.

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