Laser bending forming method for knife switch knife holder

A knife switch and bending forming technology, which is applied to forming tools, metal processing equipment, manufacturing tools, etc., to achieve the effects of improving product quality and life, reducing manufacturing costs, and high forming accuracy

Active Publication Date: 2021-03-02
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Aiming at the problem that the laser beam is blocked during the process of laser forming the knife holder, resulting in laser interference, the present invention proposes a method for laser bending and forming of the knife switch knife holder

Method used

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  • Laser bending forming method for knife switch knife holder
  • Laser bending forming method for knife switch knife holder
  • Laser bending forming method for knife switch knife holder

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Experimental program
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Effect test

Embodiment

[0032] Embodiment: The process of laser bending and forming the sample of the knife switch knife holder seat of the copper-steel laminate.

[0033] (1) Use laser to cut 1mm thick copper-steel laminate into 68mm for S1, 13.5mm for S2, 16mm for S3, 7.5mm for R, 3mm for H1, 7.5mm for H2, 15mm for H3, the diameter of 4 holes d is 4mm, and its size distribution is as follows figure 1 shown. The path distribution of the sample is the same as figure 2 , where paths L1 and L2 are 11mm from both ends, paths L3 and L4 are 9mm from paths L1 and L2, paths L5 and L8 are 13.2mm from paths L3 and L4, paths L5~L7 are connected with paths L8~ The distance between L10 is 0.8 mm, and the path L11 and the path L9 are located at the same position.

[0034] (2) Clamp the clamping part in the middle of the rough plate 2 with the clamp 4, and place it horizontally on the laser processing workbench.

[0035] (3) Adjust the position of the laser head 1 to find the scanning reference point A; set t...

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Abstract

The invention provides a laser bending forming method for a knife switch knife holder. The laser bending forming method can be used for die-free rapid bending forming of the knife switch knife holder.Firstly, based on a temperature gradient mechanism, when laser scans a metal plate, a laser scanning line area can generate uneven thermal stress due to the temperature gradient, so that the plate isbent towards a laser beam, and meanwhile, a scanning area generates new residual stress and strain distribution; and secondly, based on the buckling mechanism, laser scanning is conducted on the pre-bent back face position, and under the influence of residual stress and strain generated by pre-bending, the plate is bent in the direction opposite to the laser beam. When a knife holder sample pieceis formed through laser, high-precision laser rapid bending forming of knife holders of different sizes and shapes can be achieved by changing laser parameters and the number of laser scanning timesof all paths in combination with proper path planning.

Description

technical field [0001] The invention belongs to the field of laser bending forming of thin metal plates, in particular to a method for forward bending a copper-steel laminate based on a temperature gradient mechanism, and a method for performing laser reverse bending on a pre-bent plate based on a buckling mechanism, specifically a gate The method of laser bending forming of the knife switch tool holder is based on the path planning according to the geometric characteristics of the tool holder, which can be used to realize the mold-free flexible forming of closed workpieces such as the knife switch tool holder. Background technique [0002] Knife switch knife holder is a part of fixed blade, its shape is complicated, it is usually produced by mold in mass production, and the design cycle is long. Compared with the traditional mold processing method, laser bending forming is a flexible, moldless, no external force, non-contact rapid prototyping technology, which is easy to re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D31/00B21D37/16
CPCB21D31/005B21D37/16
Inventor 王续跃尤泉孙涛
Owner DALIAN UNIV OF TECH
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