Forming method and device for simultaneously thickening pipe end shrinkage mouth

Abstract

The invention discloses a forming method and device for simultaneously thickening a pipe end shrinkage mouth. The forming device comprises a hydraulic cylinder, a push head, a die, a filler block, heating bars, a cooling device and a heating device; a circular disc is connected to the hydraulic cylinder, a guiding cover is arranged on the circular disc, the push head is arranged on the hydraulic cylinder and penetrates through the guiding cover, the die is arranged at one side of the push head, the cooling device is arranged between the die and the push head, the die comprises a mold cavity and heating holes, the filler block is arranged in the mold cavity, and the heating bars are arranged in the heating holes, and are connected with the heating device; the filler block comprises a conical part and a reducing part, the conical part is arranged at one end of the filler block and is connected with the reducing part, and a material pushing rod is further arranged at one end of the reducing part. Through the design of the conical part of the filler block, a certain supporting effect is achieved on a pipe blank in a sudden-change area, the situation that the pipe blank gets unstable inwards when the pipe blank suffers from the axial compression stress is prevented, the forming technology is simple, the machining allowance is reduced, and the processing cost and production investment are lowered.

Description

technical field [0001] The invention relates to the technical field of plastic processing of pipes, in particular to a forming method and device for simultaneously realizing shrinkage and thickening of aluminum alloy pipe ends. Background technique [0002] The necking process is a forming method that reduces the diameter of the mouth of the tube blank. It is a kind of plastic processing technology for tubes. It is widely used in the manufacture of structural parts such as aerospace, national defense, and light industry. [0003] At present, the problems of pipe hardening and material thickness after shrinkage are ignored in pipe shrinkage forming. Therefore, after the pipe is formed, there is no significant radial thickening at the shrinkage, and other components need to be connected by welding or riveting in the later stage. At present, the tie rods in the aircraft control mechanism are formed by shrinking and riveting threaded sleeves, which will inevitably lead to low c...

AI Technical Summary

Problems solved by technology

At present, the tie rods in the aircraft control mechanism are formed by shrinking and riveting threaded sleeves, which will inevitably lead to low connection strength, high weight and high cost of the aircraft, which is avoided in the aircraft manufacturing industry.

[0004] The research on necking and thickening at home and abroad mainly introduces the distributed forming method of thickening the pipe end first and then shrinking the pipe end. However, this method increases the production cost and reduces the production efficiency. Increased difficulty

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