A metal pipe fitting cross-section support conformal device

Abstract

The invention provides a support shape-preserving device for a cross section of a metal pipe fitting. The device comprises a hollow cylinder, a plurality of circumferentially arranged support members,an inclined wedge body, a screw drive mechanism, and a connecting mechanism, wherein a plurality of sliding grooves extending in a radial direction are formed in the circumferential direction of thehollow cylinder at intervals, the inclined wedge body extends into a circumferential cavity, and the inclined wedge body pushes a plurality of radial sliding blocks to slide radially in the sliding grooves by acting on an inner circular arc plate, and then the inclined wedge body can drive a plurality of outer circular arc plates to be opened outwards or closed inwards; the screw drive mechanism is used for driving the inclined wedge body to generate axial linear movement in the circumferential cavity; the connecting mechanism is used for extending the support shape-preserving device into themetal pipe fitting; the connecting mechanism comprises a flexible connector, and one end of the flexible connector is connected with the support shape-preserving device.

Description

technical field [0001] The invention relates to the forming of metal thin-walled hollow pipe fittings, in particular to a cross-section supporting shape-keeping device for metal pipe fittings. Background technique [0002] Metal thin-walled hollow pipe fittings have been widely used in the fields of aviation, aerospace, vehicles, ships and petrochemicals due to their advantages such as high strength, light weight, easy forming, and beautiful appearance. However, when large-diameter-thick-ratio thin-walled tubes or ultra-thin-walled tubes are formed by CNC bending, due to the pressure on the inner side of the bend, it is very easy to lose stability and wrinkle; The resultant force flattens and distorts the section of the elbow, or even collapses it. In addition, due to the large-diameter-thickness ratio, thin-walled tubes or ultra-thin-walled tubes, the tube wall is very thin and the rigidity is poor. When clamping the straight section of the tube during CNC bending and form...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the surface of the clamping section is pinched or the cross section is damaged due to excessive clamping force when the straight section of the pipe fitting is clamped in the CNC bending forming of the large-diameter-thickness ratio thin-walled pipe or ultra-thin-walled pipe. Deformation, which affects the quality and performance of pipe fittings, proposes a method suitable for large-diameter-thickness ratio thin-walled pipes or ultra-thin-walled pipes, used for internal support of the straight section of pipe fittings, with reliable structure, reliable performance, simple operation, and certain versatility. A revolutionary shape-conserving device for cross-section support of metal pipe fittings

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