Forming jig and method for pressing aeroengine mesh parts

Abstract

The invention provides an aero-engine netty part press-forming clamp and method. The clamp comprises a base, a lower block, an upper block, a punch and a stress application mechanism, wherein the lower block is fixed on the base, a round counterbore is formed in the center of the lower block, a semispherical pit is formed in the round counterbore, a blank pressing boss is arranged on the lower surface of the upper block, the side face of the blank pressing boss is in clearance fit with the side face of the round counterbore of the lower block, a guiding through hole is further formed in the center of the upper block, the bottom of the punch is spherical, the fit clearance between the punch and the guiding through hole in the upper block is not larger than 0.02 mm, and the step surface of the punch is attached to the upper surface of the upper block. The clamp is easy to operate, safe and reliable when used for machining netty parts, requirements for machining conditions are low, production cost is low, and the shapes and sizes of machined parts meet the requirement of a design drawing.

Description

technical field [0001] The invention relates to the field of stamping and forming, in particular to a forming fixture and method for pressing an aero-engine mesh part. Background technique [0002] The press net of an aero-engine metal mesh part is made of interwoven metal wires with a diameter of φ0.14mm, which requires extremely high formability. If the edge force is too large, the metal wire will be severely stretched and twisted. If the blank holder force is too small during the forming process, the edge of the mesh will wrinkle. In addition, the blank-holding force is provided by the equipment for the traditional stamping die, and the forming force is too large, so it is difficult to realize it with the traditional stamping forming processing method, and it is not advisable. However, if the net-shaped part is formed by knocking with manual fixtures, the force will be uneven, and it is easy to cause serious stretching, distortion or wrinkling in the deformed area of ​​t...

AI Technical Summary

Problems solved by technology

[0002] The press net of an aero-engine metal mesh part is made of interwoven metal wires with a diameter of φ0.14mm, which requires extremely high formability. If the edge force is too large, it will lead to severe stretching, distortion and deformation of the wire. If the blank holder force is too small during the forming process, the edge of the mesh will wrinkle.

In addition, the traditional stamping die is provided by the equipment to provide blank-holding force, and the forming force is too large, so it is difficult to realize it with the traditional stamping forming processing method, and it is not advisable

However, if the mesh part is formed by knocking with manual fixtures, the force will be uneven, and it is easy to cause serious stretching, distortion or wrinkling in the deformed area of ​​the wire.

There is no domestic manufacturer of this part, and it has been imported from Ukraine for outsourcing. There is no forming method and experience for reference.

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