Laser-flame combination cutting method

A technology of flame compounding and cutting method, applied in welding/welding/cutting items, manufacturing tools, metal processing and other directions, can solve the problems of low efficiency of thick steel, easy to form slag, easy to melt and collapse of cutting seam, etc., to achieve the cutting surface The effect of high quality, good verticality and large cutting thickness

Active Publication Date: 2014-07-23
HARBIN WELDING INST LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a laser-flame composite cutting method to solve the technical problems of low efficiency, large deformation, easy melting and collapse on the upper side of the cutting seam, and easy formation of dross on the lower side in flame cutting of medium and thick steel materials.

Method used

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specific Embodiment approach 1

[0028] Specific implementation mode one: the laser-flame composite cutting method of this implementation mode is as follows:

[0029] Fix the steel plate on the workbench, adopt the laser and flame coaxial or non-coaxial method, when the laser power is 2000W-20000W, the auxiliary gas pressure is 0.1-0.8bar, the main cutting oxygen pressure is 0.7bar-10bar, and the auxiliary combustion Cutting at a cutting speed of 0.10m / min-2.0m / min under the oxygen pressure of 0.1-1.0bar until the steel plate is broken, that is, the laser-flame composite cutting is completed;

[0030] The laser focus is located 2-30mm above the steel plate surface, and the distance from the lower edge of the laser nozzle to the steel plate surface is 1.0-5.0mm.

specific Embodiment approach 2

[0031] Embodiment 2: This embodiment is different from Embodiment 1 in that the auxiliary gas is acetylene, propane or gasoline. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0032] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the laser power is 5800W. Others are the same as those in the first or second embodiment.

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Abstract

The invention provides a laser-flame combination cutting method, relates to a cutting method for integrating a laser heat source and a flame heat source, and belongs to the technical field of metal thermal cutting. The laser-flame combination cutting method solves the technical problems that in flame cutting, cutting efficiency of thick steel products is low, deformation is high, the upper edge of a kerf is prone to melting and collapsing, and adhering slag is easily formed on the lower edge of the kerf. The method comprises the following steps that a steel plate is fixed on a workbench, the steel plate is cut at a high speed in a laser and flame coaxial or non-coaxial combination mode, and namely laser-flame combination cutting is completed. The kerf obtained with the method is good in perpendicularity, the quality of the cutting surface is high, the cutting thickness is large, and an expensive hafnium electrode does not need to be replaced periodically. The laser-flame combination cutting method has the advantages that the cutting speed is high, the cutting efficiency is high, a heat affected zone is small, deformation is small, no hole needs to be formed in the steel plate in advance because lasers have the punching function, and a cutting process is directly started without the need for preheating. The laser-flame combination cutting method belongs to the field of steel-product cutting.

Description

technical field [0001] The invention relates to a cutting method integrating a laser heat source and a flame heat source, and belongs to the technical field of metal thermal cutting. Background technique [0002] At present, the most widely used metal thermal cutting methods in the industrial field mainly include three cutting methods: flame cutting, plasma cutting and laser cutting. [0003] The flame cutting method has better cutting ability for cutting large thickness carbon steel, and its cutting cost is relatively low. It can be widely used in cutting carbon steel and large-thickness plates, but it has no advantages in cutting thin plates. The disadvantages of the flame cutting method are low cutting efficiency, wide heat-affected zone, and large cutting deformation, which in turn affects cutting accuracy. When flame cutting thick plates, only low carbon steel and low alloy steel can be cut. Moreover, a preheating process is required to start cutting. The thicker the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K28/02
CPCB23K28/02B23K2101/18B23K2103/04
Inventor 王威林尚扬王旭友徐良腾彬雷震
Owner HARBIN WELDING INST LTD
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