Stretching-compression combined type flexible three-dimensional section material stretch-bend forming process and device

Abstract

The invention discloses a stretching-compression combined type flexible three-dimensional section material stretch-bend forming device. Each forming unit is composed of two end racks, a disc type brake device, a synchronous vertical lifting device, a rotary shape adjusting device, a worktable, a mold assembly, a hydraulic executing mechanism and a sensor. The invention solves a technical problem of complex bend forming of 'S'-shaped and 'W'-shaped section materials unable to be realized by traditional three-dimensional stretch bending by adopting a method of combining stretch-bending with compression-bending, using clamps to drive the section materials to be closed with a mold in a vertical direction, using a hydraulic cylinder mounted on an end part of a unit body to drive a piston rod ona formed curved surface, and performing stretch-bend forming on the section materials on the vertically bent curved surface. The stretching-compression combined type flexible three-dimensional section material stretch-bend forming device reduces labor intensity, improves production efficiency and molding precision and eliminates influence of rebound deformation uncertainty on forming precision byan automatic shape adjusting technology, realizes two-dimensional or three-dimensional bend forming of section material components with a same cross section and different target shapes, and reduces mold manufacturing costs.

Description

technical field [0001] The invention relates to a three-dimensional stretch-bending forming equipment for profiles, which belongs to the field of mechanical engineering and can be widely used in the production of three-dimensional skeleton structural parts of aerospace vehicles, rail passenger cars, automobiles and the like. Background technique [0002] The three-dimensional stretch-bent structural parts of metal profiles have structural characteristics such as light weight, low material consumption, high structural strength, good aerodynamic performance, and smooth geometric shape. They are more and more used in high-end walking machinery such as aircraft, high-speed trains, and automobiles It is an advanced lightweight structure that can effectively improve the safety, handling and fuel economy of vehicles. With the continuous development of modern industry, the shape design of the carrier tends to be streamlined and complicated, and the demand for three-dimensional stret...

AI Technical Summary

Problems solved by technology

An automatic shape adjustment mechanism is designed. Before forming, the multi-point mold can be automatically adjusted on the unit body to form the envelope surface in the vertical direction of the target part, which overcomes the shortcomings of low efficiency, poor precision, and high labor intensity of manual shape adjustment, and realizes Automatic shape adjustment and precise control of the position and rotation angle of the multi-point three-dimensional stretch bending die

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