CN-116174929-B - Corner cutting method, equipment and medium of laser pipe cutting machine

CN116174929BCN 116174929 BCN116174929 BCN 116174929BCN-116174929-B

Abstract

The application discloses a corner cutting method, equipment and a medium of a laser pipe cutting machine, and the method comprises the steps of obtaining pipe parameters of a pipe to be cut, generating a cutting track of the pipe to be cut according to the pipe parameters, determining a corner outlet corner point and a corner inlet corner point corresponding to each corner of the pipe to be cut in the cutting track, determining a corner radius corresponding to the corner and a corner buffer zone according to the corner outlet corner point and the corner inlet corner point, judging whether a cutting focus corresponding to a cutting head reaches the corner or the corner buffer zone in the plane cutting process, if so, determining a corner cutting process parameter corresponding to the corner of the cutting head according to the plane cutting process parameter corresponding to the plane cutting, and determining a corner buffer zone cutting process parameter corresponding to the corner buffer zone according to the corner cutting process parameter when the corner is reached, so as to cut the pipe to be cut according to the corner buffer zone cutting process parameter when the corner is reached.

Inventors

LU SHIQIANG
Ren Zelu
WANG XU
Geng Rupeng
WANG LELIN

Assignees

济南邦德激光股份有限公司

Dates

Publication Date: 20260508
Application Date: 20221216

Claims (9)

1. A method of cutting a corner of a laser pipe cutter, the method comprising: obtaining pipe parameters of a pipe to be cut, and generating a cutting track of the pipe to be cut according to the pipe parameters, wherein the pipe parameters at least comprise the type and the plane thickness of the pipe to be cut; determining a corner outlet corner point and a corner inlet corner point corresponding to each corner of the pipe to be cut in the cutting track, and determining a corner radius and a corner buffer zone corresponding to the corner according to the corner outlet corner point and the corner inlet corner point; Controlling a cutting head to cut a pipe to be cut, which rotates along the cutting track, in a plane cutting process, and judging whether a cutting focus corresponding to the cutting head reaches the corner or the corner buffer area; if so, determining a corner cutting process parameter corresponding to the corner of the cutting head and a corner buffer zone cutting process parameter corresponding to the corner buffer zone according to the plane cutting parameters corresponding to the plane cutting, so as to cut the pipe to be cut according to the corner cutting process parameter when the corner is reached, or cut the pipe to be cut according to the corner buffer zone cutting process parameter when the corner buffer zone is reached; according to the corner outlet point and the corner inlet point, determining a corner radius and a corner buffer zone corresponding to the corner specifically comprises the following steps: Determining a first corner outlet point and a first corner inlet point of the cutting track on a first plane and a second corner outlet point on a second plane, wherein the plane on which the second plane is positioned is a plane of the first plane rotated by a specified angle along the positive rotation direction of the pipe to be cut; determining a central point of the pipe to be cut, and plane coordinates corresponding to the central point, the first corner outlet point, the first corner inlet point and the second corner outlet point respectively, wherein the abscissa of the plane coordinates represents a Y-axis coordinate, and the ordinate represents a Z-axis coordinate; calculating a corner radius corresponding to the corner according to the difference between the abscissa of the first outgoing corner point and the first incoming corner point and the difference between the ordinate of the second outgoing corner point and the center point: and determining a corner buffer zone corresponding to the corner along the rotation positive direction of the pipe to be cut according to the corner entering point, the corner radius and the plane thickness.
2. The method for cutting the corners of the pipe cutter according to claim 1, wherein determining the corner outlet points and the corner inlet points corresponding to the corners of the pipe to be cut in the cutting track specifically comprises: Determining a first coordinate value and a second coordinate value corresponding to a previous track point and a subsequent track point of the cutting track point respectively and a coordinate value corresponding to the cutting track point aiming at the cutting track point in the cutting track, wherein the abscissa in the coordinate values, the first coordinate value and the second coordinate value represents a Y-axis coordinate, the ordinate represents a Z-axis coordinate, and the ordinate represents a rotation angle; and comparing the coordinate values with the first coordinate values and the second coordinate values respectively, and determining whether the coordinate values are consistent with the first coordinate values and the second coordinate values or not so as to determine the corner outlet points and the corner inlet points corresponding to the corners of the pipe to be cut.
3. The method for cutting the corner of the pipe cutting machine according to claim 2, wherein determining whether the coordinate value is consistent with the first coordinate value and the second coordinate value to determine the corner outlet point and the corner inlet point corresponding to each corner of the pipe to be cut specifically comprises: If the ordinate and the vertical coordinate of the cutting track point are the same as those of the previous track point and are different from those of the subsequent track point, determining the cutting track point as an entering corner point of the corner; and if the ordinate and the vertical coordinate of the cutting track point are the same as those of the subsequent track point and are different from those of the previous track point, determining the cutting track point as the turning point out of the corner.
4. The method for cutting a corner of a laser pipe cutting machine according to claim 1, wherein during the planar cutting, determining whether a cutting focus corresponding to the cutting head reaches the corner or the corner buffer area, the method further comprises: Confirming whether a numerical control system can generate corner cutting process parameters corresponding to the corners of the cutting head and corner buffer zone cutting process parameters corresponding to the corner buffer zones according to the plane cutting parameters corresponding to the plane cutting; If not, acquiring preset corner process cutting parameters, and judging whether a cutting focus corresponding to the cutting head reaches the corner in the plane cutting process, so that when the cutting focus reaches the corner, the tubular product to be cut is cut through the preset corner process cutting parameters.
5. The corner cutting method of claim 1, wherein the planar cutting parameters, the corner cutting process parameters and the corner buffer cutting process parameters comprise at least cutting power, follower height, cutting speed and cutting focus.
6. The corner cutting method of the laser pipe cutting machine according to claim 1, wherein the determining the corner cutting process parameters corresponding to the cutting head at the corner according to the plane cutting parameters corresponding to the plane cutting specifically comprises: calculating the corner cutting power of the cutting head at the corner by the following formula: 1 Wherein, the For the corner cutting power to be used, For the planar cutting power of the cutting head, 1 Is a first correction coefficient; Calculating an arctangent value of the plane follow-up height according to the plane follow-up height corresponding to the plane cutting, so as to determine a corner follow-up height corresponding to the cutting head at the corner according to the arctangent value and the plane follow-up height; And determining a plane cutting speed and a plane cutting focus corresponding to the plane cutting, and correspondingly calculating a corner cutting speed and a corner cutting focus of the cutting head at the corner according to the plane cutting speed and the plane cutting focus.
7. The corner cutting method of the laser pipe cutting machine according to claim 1, wherein determining the corner buffer cutting process parameters corresponding to the corner buffer according to the plane cutting parameters corresponding to the plane cutting specifically comprises: calculating the cutting process parameters of the cutting head in the corner buffer area corresponding to the corner buffer area through the following formula: Wherein, the Cutting power for the corner buffers, For the planar cutting power of the cutting head, D is the pipe thickness, r is the corner radius, K is a preset variable and is a second correction coefficient, ; The plane follow-up height corresponding to the plane cutting is used as the corner buffer zone follow-up height corresponding to the corner buffer zone; And determining a plane cutting speed and a plane cutting focus corresponding to the plane cutting, and correspondingly calculating a corner cutting speed and a corner cutting focus of the cutting head at the corner buffer zone according to the plane cutting speed and the plane cutting focus.
8. A laser pipe cutting machine corner cutting apparatus, comprising: At least one processor, and A memory communicatively coupled to the at least one processor, wherein, The memory stores instructions executable by the at least one processor, the instructions are executable by the at least one processor to enable the at least one processor to: obtaining pipe parameters of a pipe to be cut, and generating a cutting track of the pipe to be cut according to the pipe parameters, wherein the pipe parameters at least comprise the type and the plane thickness of the pipe to be cut; determining a corner outlet corner point and a corner inlet corner point corresponding to each corner of the pipe to be cut in the cutting track, and determining a corner radius and a corner buffer zone corresponding to the corner according to the corner outlet corner point and the corner inlet corner point; Controlling a cutting head to cut a pipe to be cut, which rotates along the cutting track, in a plane cutting process, and judging whether a cutting focus corresponding to the cutting head reaches the corner or the corner buffer area; If so, determining a corner cutting process parameter corresponding to the corner of the cutting head and a corner buffer zone cutting process parameter corresponding to the corner buffer zone according to the plane cutting process parameter corresponding to the plane cutting, so as to cut the pipe to be cut according to the corner cutting process parameter when the corner is reached, or cut the pipe to be cut according to the corner buffer zone cutting process parameter when the corner buffer zone is reached; according to the corner outlet point and the corner inlet point, determining a corner radius and a corner buffer zone corresponding to the corner specifically comprises the following steps: Determining a first corner outlet point and a first corner inlet point of the cutting track on a first plane and a second corner outlet point on a second plane, wherein the plane on which the second plane is positioned is a plane of the first plane rotated by a specified angle along the positive rotation direction of the pipe to be cut; determining a central point of the pipe to be cut, and plane coordinates corresponding to the central point, the first corner outlet point, the first corner inlet point and the second corner outlet point respectively, wherein the abscissa of the plane coordinates represents a Y-axis coordinate, and the ordinate represents a Z-axis coordinate; calculating a corner radius corresponding to the corner according to the difference between the abscissa of the first outgoing corner point and the first incoming corner point and the difference between the ordinate of the second outgoing corner point and the center point: and determining a corner buffer zone corresponding to the corner along the rotation positive direction of the pipe to be cut according to the corner entering point, the corner radius and the plane thickness.
9. A non-transitory computer storage medium storing computer-executable instructions, the computer-executable instructions configured to: obtaining pipe parameters of a pipe to be cut, and generating a cutting track of the pipe to be cut according to the pipe parameters, wherein the pipe parameters at least comprise the type and the plane thickness of the pipe to be cut; determining a corner outlet corner point and a corner inlet corner point corresponding to each corner of the pipe to be cut in the cutting track, and determining a corner radius and a corner buffer zone corresponding to the corner according to the corner outlet corner point and the corner inlet corner point; Controlling a cutting head to cut a pipe to be cut, which rotates along the cutting track, in a plane cutting process, and judging whether a cutting focus corresponding to the cutting head reaches the corner or the corner buffer area; if so, determining a corner cutting process parameter corresponding to the corner of the cutting head and a corner buffer zone cutting process parameter corresponding to the corner buffer zone according to a plane process cutting parameter corresponding to the plane cutting, so as to cut the pipe to be cut according to the corner cutting process parameter when the corner is reached, or cut the pipe to be cut according to the corner buffer zone cutting process parameter when the corner buffer zone is reached; according to the corner outlet point and the corner inlet point, determining a corner radius and a corner buffer zone corresponding to the corner specifically comprises the following steps: Determining a first corner outlet point and a first corner inlet point of the cutting track on a first plane and a second corner outlet point on a second plane, wherein the plane on which the second plane is positioned is a plane of the first plane rotated by a specified angle along the positive rotation direction of the pipe to be cut; determining a central point of the pipe to be cut, and plane coordinates corresponding to the central point, the first corner outlet point, the first corner inlet point and the second corner outlet point respectively, wherein the abscissa of the plane coordinates represents a Y-axis coordinate, and the ordinate represents a Z-axis coordinate; calculating a corner radius corresponding to the corner according to the difference between the abscissa of the first outgoing corner point and the first incoming corner point and the difference between the ordinate of the second outgoing corner point and the center point: and determining a corner buffer zone corresponding to the corner along the rotation positive direction of the pipe to be cut according to the corner entering point, the corner radius and the plane thickness.

Description

Corner cutting method, equipment and medium of laser pipe cutting machine Technical Field The application relates to the technical field of laser cutting, in particular to a method, equipment and medium for cutting corners of a laser pipe cutting machine. Background With the increasing improvement of upgrading and cutting processes of the laser pipe cutting machine, the types of pipes which can be processed by the laser pipe cutting machine are more and more, and besides the conventional round pipes, rectangular pipes, angle steels, channel steels and other pipes can be processed. However, during the processing of these pipes or profiles with corners, jutter, misalignment of the corners with the plane, cutting imperviousness, overburning, reduced height of the cutting head follower, and even collision of the cutting head nozzle with the pipe may occur during cutting at the pipe corners. This is because the thickness of the tubing and the follower height change over time during the cutting of the tubing corners. Therefore, when pipe cutting is performed at the corners, the cutting process parameters need to be adjusted to ensure the stability of cutting at the corners. The conventional method is to preset a corner cutting process, and change parameters such as cutting speed, power, focus and follow-up height, so that the conditions of incomplete cutting and collision between a cutting head and a pipe are prevented, but various pipes are different in quality and thickness, angle and size of the corner and the like, therefore, when different pipes are cut, a certain time of test is needed to obtain better cutting process parameters, the cutting efficiency is reduced as a whole, and meanwhile, a certain pipe is wasted during the test. Disclosure of Invention In order to solve the above problems, the present application provides a method for cutting a corner of a laser pipe cutting machine, comprising: obtaining pipe parameters of a pipe to be cut, and generating a cutting track of the pipe to be cut according to the pipe parameters, wherein the pipe parameters at least comprise the type and the plane thickness of the pipe to be cut; determining a corner outlet corner point and a corner inlet corner point corresponding to each corner of the pipe to be cut in the cutting track, and determining a corner radius and a corner buffer zone corresponding to the corner according to the corner outlet corner point and the corner inlet corner point; Controlling a cutting head to cut a pipe to be cut, which rotates along the cutting track, in a plane cutting process, and judging whether a cutting focus corresponding to the cutting head reaches the corner or the corner buffer area; If so, determining a corner cutting process parameter corresponding to the corner of the cutting head and a corner buffer zone cutting process parameter corresponding to the corner buffer zone according to the plane cutting parameters corresponding to the plane cutting, so as to cut the pipe to be cut according to the corner cutting process parameter when the corner is reached, or cut the pipe to be cut according to the corner buffer zone cutting process parameter when the corner buffer zone is reached. In one implementation manner of the application, determining the outgoing corner point and the incoming corner point corresponding to each corner of the pipe to be cut in the cutting track specifically comprises: Determining a first coordinate value and a second coordinate value corresponding to a previous track point and a subsequent track point of the cutting track point respectively and a coordinate value corresponding to the cutting track point aiming at the cutting track point in the cutting track, wherein the abscissa in the coordinate values, the first coordinate value and the second coordinate value represents a Y-axis coordinate, the ordinate represents a Z-axis coordinate, and the ordinate represents a rotation angle; and comparing the coordinate values with the first coordinate values and the second coordinate values respectively, and determining whether the coordinate values are consistent with the first coordinate values and the second coordinate values or not so as to determine the corner outlet points and the corner inlet points corresponding to the corners of the pipe to be cut. In one implementation manner of the present application, determining whether the coordinate value is consistent with the first coordinate value and the second coordinate value to determine an outgoing corner point and an incoming corner point corresponding to each corner of the pipe to be cut specifically includes: If the ordinate and the vertical coordinate of the cutting track point are the same as those of the previous track point and are different from those of the subsequent track point, determining the cutting track point as an entering corner point of the corner; and if the ordinate and the vertical coordinate of the cutting track point are the same as