Bidirectional thin-wall pipe fitting corrugation forming tool

Abstract

The invention discloses a bidirectional thin-wall pipe fitting corrugation forming tool. The bidirectional thin-wall pipe fitting corrugation forming tool comprises an outer sleeve mold, an inner forming mechanism and a driving mechanism, wherein the inner forming mechanism and the driving mechanism are arranged in the outer sleeve mold; the thin-wall pipe fitting is arranged in a middle cavity of the outer sleeve mold; the jacket mold comprises a jacket front half mold and a jacket rear half mold which are connected with each other, the jacket front half mold is fastened on a machine tool spindle or a chuck, the bottom surface of the jacket front half mold and the top surface of the jacket rear half mold form symmetrically arranged corrugated half grooves, and the two corrugated half grooves form a corrugated groove; the internal forming mechanism comprises a ball screw, an axial pressing mechanism, a plurality of rollers and a radial outer supporting mechanism; the ball screw is connected with the driving mechanism; the axial pressing mechanism comprises a pair of reverse spinning pressing pieces arranged at the two ends of the ball screw. The radial outer supporting mechanism comprises a pair of reverse rotation nuts arranged on the ball screw and a plurality of sets of connecting rod mechanisms. Uniform external supporting of multiple parts in the circumferential direction is achieved, pressure is jointly applied in the axial direction and the radial direction in a matched mode, and the forming capacity is improved.

Description

technical field [0001] The invention belongs to the field of corrugation forming dies, in particular to a corrugation forming tool for bidirectionally acting thin-walled pipe fittings. Background technique [0002] In order to complete some special functions, it is necessary to carry out corrugated bulging on high-strength metal thin-walled tubes (wall thickness <0.2mm). The forming process is a comprehensive change of material elastic shape, plastic deformation, and bending forming, and the processing and forming are more difficult. big. Especially for thin-walled tubes with a wall thickness <0.2mm, it is necessary to form corrugations with a large wave height / wave width ratio. The existing conventional technology adopts a one-way outer top and a purely radial offset displacement method. On the one hand, the local stress is too large On the other hand, the material cannot be effectively pulled into the inner cavity of the mold from the axial direction, and cracks are...

AI Technical Summary

Problems solved by technology

[0002] In order to complete some special functions, it is necessary to carry out corrugated bulging on high-strength metal thin-walled tubes (wall thickness <0.2mm). The forming process is a comprehensive change of material elastic shape, plastic deformation, and bending forming, and the processing and forming are more difficult. Big

Especially for thin-walled tubes with a wall thickness <0.2mm, it is necessary to form corrugations with a large wave height / wave width ratio. The existing conventional technology adopts a one-way outer top and a purely radial offset displacement method. On the one hand, the local stress is too large On the other hand, the material cannot be effectively pulled into the inner cavity of the mold from the axial direction, and cracks are prone to occur during the molding process, resulting in waste products

Images