Laser cutting method for angle of rotation

A technology of laser cutting and corner turning, which is applied in the direction of laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of reduced cutting speed, increased nitrogen consumption, and reduced processing efficiency, so as to reduce impermeable cutting and reduce loss rate , the effect of improving the service life

Active Publication Date: 2009-07-08
HANS LASER TECH IND GRP CO LTD
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AI-Extracted Technical Summary

Problems solved by technology

[0005] There are two ways to deal with this situation in the past laser cutting machine tools: one is to increase the cutting nozzle to increase the flow rate of high-speed auxiliary nitrogen gas used for cutting. Gas flow for removing molten metal is adequate, but nitrogen consumption increases
The second is to reduce the cutting speed. After the cuttin...
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Method used

Like this, both can guarantee to reduce cutting speed to cut smoothly at the profile corner section of cutting path, do not need to increase the high-speed nitrogen flow of cutting auxiliary usefulness, can guarantee to cut with normal speed in other sections of cutting path again, have higher processing efficiency. ...
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Abstract

The invention relates to a laser cutting method for a corner. In the invention, a PLC control program is adopted to control the speed magnification of a CNC numerical control system, so that a machine tool automatically reduces speed magnification and obtains relatively low cutting speed at a contour corner of a cutter path; after smoothly passing through the contour corner of the cutter path, the machine tool gradually raises cutting speed to the normal cutting speed, so that the machine tool can not only reduce cutting speed at the contour corner of the cutter path and smoothly carry out cutting without increasing nitrogen flow for supporting cutting, but also ensure that the machine tool can carry out cutting at normal speed at other sections of the cutter path, thus obtaining relatively high processing efficiency. Moreover, as the control of the processing machine tool is improved, insufficient cutting and rejected slag in the laser cutting process are greatly reduced, thus well protecting a focus lens from being polluted by cutting rejected slag, prolonging the service life of the focus lens and reducing attrition rate thereof.

Application Domain

Laser beam welding apparatus

Technology Topic

SlagNumerical control system +6

Image

  • Laser cutting method for angle of rotation
  • Laser cutting method for angle of rotation
  • Laser cutting method for angle of rotation

Examples

  • Experimental program(1)

Example Embodiment

[0016] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.
[0017] Such as figure 1 , The laser cutting method for the corner of the present invention is suitable for high-power laser cutting machine tools for laser cutting of thick stainless steel materials (above 3MM).
[0018] Such as Figure 2 to Figure 4 , Perform the following process control on the cutting speed magnification at the track corner (such as Figure 4 ), the steps are as follows:
[0019] a: At the contour corner of the cutting path, the CNC control system judges the contour corner angle according to the cutting contour shape;
[0020] b: Set the cutting machine tool to the motion pause delay state, and preset the minimum speed override parameter P171 value at the corner, and write the CNC control system through control, so that the speed override of the CNC control system is set to the minimum speed override parameter P171 at the corner The value of the minimum speed is V*P171%;
[0021] c: The pause delay of the cutting machine tool ends, and the control system starts the corner rate control function command. According to the distance of the machine tool from the corner, gradually increase the speed override of the machine tool movement (such as image 3 ), at a distance of 2mm away from the corner, the machine speed override increases to 100% of the feed speed V, and the machine speed also returns to the normal cutting speed;
[0022] d: The machine tool ends the corner control function command, the corner deceleration control process is completed, and the cutting returns to the normal state.
[0023] After setting the rate control at the corner, start the entire laser cutting process, the steps are as follows:
[0024] Step 1: Set the coordinate system and cutting start point;
[0025] Step 2: Select perforation conditions and perforate;
[0026] The third step: select cutting conditions and cut;
[0027] Step 4: Operate the cutting head or worktable to move along the contour of the cutting path according to the speed program at the corner;
[0028] Step 5: Cutting is complete.
[0029] The invention controls the speed override of the CNC control system, so that the machine tool automatically reduces the speed override at the contour corner of the cutting path, and obtains a lower cutting speed at the contour corner section of the cutting path. After smoothly passing the contour corner of the cutting path, Gradually increase the cutting speed magnification to the normal cutting speed.
[0030] In this way, it can not only ensure that the cutting speed is reduced in the contour corner section of the cutting path, and the cutting can be carried out smoothly, without increasing the high-speed nitrogen flow for cutting assistance, but also can ensure that the other sections of the cutting path are cut at a normal speed, which has high processing efficiency. . In addition, by improving the control of the processing machine tool, the phenomenon of imperviousness and anti-slag in the laser cutting process is greatly reduced, the focusing lens is well protected from the pollution of cutting anti-slag, and the service life of the focusing lens is improved and reduced The loss rate of the focusing lens.
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Description & Claims & Application Information

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