Six-axis bending device and method based on core rod rotation

Abstract

The invention discloses a six-axis bending device and method based on core rod rotation. A core rod rotating in a single direction is established, the core rod is applied to a scene that three-dimensional free bending six-axis equipment bends a space track pipe, and a geometric parameter model between a space position parameter and a deflection parameter of a bending die deflection device and an angle parameter of the core rod rotating in the axis direction is established. In the bending forming process of the pipe, the inner wall can be supported, the wrinkling tendency of the thin-wall pipe can be effectively reduced, the section deformation of the pipe is restrained, the wall thickness is prevented from being excessively reduced, and the forming quality and the service performance of the pipe can be guaranteed. The core rod bent in the single direction can effectively solve the problem that a universal core rod cannot achieve the supporting effect on the condition that the bending radius of a pipe is small in bending forming. And the bendable direction of the core rod is rotated to the direction required by bending along the axis direction through an algorithm, so that the problem that the bending direction of the core rod bent in the single direction is single can be effectively solved.

Description

technical field [0001] The invention belongs to a six-axis bending device and method based on the rotation of a mandrel, and belongs to the field of plastic processing and forming. Background technique [0002] The three-dimensional free bending system of complex components can realize high-precision die-free forming of pipes, profiles, and wires under various bending radius conditions, which poses a huge challenge to traditional metal bending and forming technology, and is recognized as a kind of plastic forming field. Important technological innovation. Compared with the original three-dimensional free bending three-axis machine, the three-dimensional free bending six-axis machine has two more axes and greater degrees of freedom. In addition to X, Y, Z movement, the six-axis free bending machine can also realize the rotation angle δ of the bending die around its own axis, and the rotation angle γ of the bending die around its own axis, which can realize the axis during th...

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Problems solved by technology

[0004] At present, the principle of a universal rotating mandrel that is more popular in the market is to use the middle sphere as a movable joint link to play the role of universal rotation, but when the bending radius is too small, the adjacent core balls are prone to interference.

Therefore, the present invention adopts a mandrel that can only be bent in one direction. Since the thickness of the core sphere is relatively low inside the core sphere in the bending direction, it can relatively effectively avoid the interference of the core sphere when forming a pipe with a small bending radius. , but since this kind of mandrel can only be formed in one direction, it cannot meet the actual forming needs of the six-axis machine

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