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A thick steel plate flame cutting method

A technology for flame cutting and thick steel plates, which is applied in the direction of gas flame welding equipment, metal processing equipment, welding equipment, etc. It can solve the problems of rough cutting surface, impermeable cutting of steel plate, and large bevel angle, so as to reduce the amount of post-processing and improve Flatness of cutting surface, reducing the effect of kerf

Active Publication Date: 2018-10-02
安徽景隆金属材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems that the existing flame cutting process is easy to cut through the steel plate with a thickness of more than 300mm, the cutting surface is rough and uneven, the bevel angle is large, and the kerf is wide. Cutting of steel plate with high cutting quality and high efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In order to solve the problem of cutting and processing the base of heavy machine tools by small and medium-sized enterprises, in this embodiment, an ordinary gantry type flame cutting machine is used to cut a steel plate with a material of Q235B and a thickness of 400mm. The gantry type flame cutting machine uses a cutting oxygen aperture of 3.6mm. No. 9 cutting nozzle, the specific method includes the following steps:

[0030] Step 1: manually use a stone pen to determine the cutting path on the thick steel plate to be cut, and the cutting path includes the cutting starting point;

[0031] Step 2: Place the thick steel plate with the cutting path determined in Step 1 on the platform of the cutting machine to ensure a horizontal state;

[0032] Step 3: Move the head of the cutting machine, so that the head of the flame gun on the head is at a distance of 50mm from the cutting starting point described in step 2, and the head is in a vertical state with the surface of th...

Embodiment 2

[0040] In this embodiment, an ordinary gantry flame cutting machine is used to cut a steel plate with a material of Q235B and a thickness of 600 mm. The gantry flame cutting machine also uses a No. 9 cutting nozzle with an oxygen aperture of 3.6 mm. The specific method and implementation Example 1 is basically the same, the difference is that in step 1, the copper sulfate solution is manually used to draw the cutting path in advance, and the copper sulfate solution reacts with the iron in the thick steel plate to form copper, which is easy to identify and helps to provide control accuracy.

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Abstract

The invention discloses a flame cutting method for a thick steel plate and belongs to the field of flame cutting. By means of the flame cutting method, the problems that when a steel plate with the thickness greater than 300 mm is cut through existing flame cutting technologies, the steel plate is not likely cut thoroughly, a cutting face is rough and uneven, an oblique angle is large, and a cutting gap is wide are solved. The flame cutting method comprises the steps of determining a cutting path; placing the thick steel plate on a platform of a cutting machine; moving a gun head of a flame gun on a machine head to the position 50 mm away from the cutting starting point; adjusting a gun nozzle of the gun head to be 15 mm away from the surface of the thick steel plate; conducting preheating on the thick steel plate; adjusting the top end of the gun nozzle to be 150 mm away from the surface of the thick steel plate; adjusting the gun nozzle in step 6 to move toward the cutting starting point at the speed of 70 mm / min; and synchronously adjusting the moving speed of the gun nozzle and the distance between the top end of the gun nozzle and the surface of the thick steel plate, so that cutting is completed. By means of the flame cutting method for the thick steel plate, the thick steel plate with the thickness ranging from 300 mm to 600 mm can be cut smoothly; and the flame cutting method is high in cutting quality and efficiency.

Description

technical field [0001] The invention belongs to the field of flame cutting, in particular to a flame cutting method for thick steel plates. Background technique [0002] According to the processing principle, there are three main types of metal thermal cutting materials on the market: one is flame cutting. The flame cutting machine generally includes a cutting head, and a flame gun is arranged on the cutting head. The flame gun includes a gun head and a gun nozzle, and the gun nozzle can be replaced on the gun head. Flame cutting belongs to the oxidation cutting of metal. It uses flame to preheat the metal to make it reach the ignition point of the metal, and then gives pure oxygen to react it into a low melting point oxidized slag, and at the same time releases a lot of heat to further heat the metal to be cut. At present, small and medium-sized enterprises in China use small flame cutting devices, which can generally cut steel plates with a thickness of less than 300mm. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K7/00B23K7/10
CPCB23K7/002B23K7/102
Inventor 孙禄善
Owner 安徽景隆金属材料有限公司