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

A stretch-bending and profile technology, applied in the field of profile three-dimensional stretch-bending equipment, can solve the problems of low efficiency of manual shape adjustment, poor precision, and high labor intensity, so as to improve production efficiency and forming accuracy, reduce mold manufacturing costs, The effect of reducing artificial strength

Active Publication Date: 2018-07-24
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

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specific Embodiment approach 1

[0017] Specific implementation mode 1: This implementation mode will be described in conjunction with the drawings and embodiments.

[0018] A flexible three-dimensional stretch-bending forming device for combined tension-compression profiles. This equipment is composed of several regularly arranged and identical forming units, such as figure 2 As shown, each forming unit consists of two ends of the frame (01), two disc brake devices (02), two synchronous vertical lifting devices (03), a rotary shape adjustment device (04), and a workbench (05) , mold assembly (06), hydraulic actuator (07), and sensor (08); the vertical lifting device (03) is installed on the frame (01); the rotary shape-adjusting device (04) is installed at one end of the vertical lifting on the device (03); the workbench (05) is installed on the rotary shape adjusting device (04); the mold assembly (06), hydraulic actuator (07) and sensor (08) are installed on the workbench (05); the clamp (09) are placed ...

Embodiment 1

[0026] Embodiment 1, three-dimensional stretch-bending forming of rectangular cross-section aluminum profile "C" shape:

[0027] In the first step, the target part is projected as a circular arc on the horizontal plane and the vertical plane, and the number of unit bodies used is determined to be 6 according to the drawing of the target three-dimensional stretch-bending forming part;

[0028] The second step is to determine the shape adjustment parameters of the number 1-6 shape adjustment unit, including: the height of the shape adjustment in the vertical direction, the rotation angle of the worktable, and the extension length of the piston rod of the hydraulic actuator;

[0029] In the third step, the material of the part is aluminum profile. After confirming the process parameters and pre-stretching amount, the vertical height and rotation angle of each forming unit are automatically adjusted according to the shape adjustment parameters. After the shape is adjusted to the sp...

Embodiment 2

[0037] Embodiment 2, three-dimensional stretch-bending forming of rectangular cross-section aluminum profile "S" shape:

[0038]In the first step, the target part is projected as an "S"-shaped curve on the horizontal plane, and projected as a circular arc on the vertical plane. According to the drawing of the target three-dimensional stretch-bending forming part, the number of unit bodies used is determined to be 6;

[0039] The second step is to determine the shape adjustment parameters of the number 1-6 shape adjustment unit, including: the height of the shape adjustment in the vertical direction, the rotation angle of the worktable, and the extension length of the piston rod of the hydraulic actuator;

[0040] In the third step, the material of the part is aluminum profile. After confirming the process parameters and pre-stretching amount, the vertical height and rotation angle of each forming unit are automatically adjusted according to the shape adjustment parameters. Afte...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D22/22B21D7/06B21D37/12B21D7/16
CPCB21D7/06B21D7/16B21D22/22B21D37/12
Inventor 高嵩李奇涵孙荧力郝兆朋李绍松韩玲
Owner CHANGCHUN UNIV OF TECH
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