CN110605485A - Method for searching center of pipe with section having two unparallel straight line edges - Google Patents
Method for searching center of pipe with section having two unparallel straight line edges Download PDFInfo
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- CN110605485A CN110605485A CN201910733089.5A CN201910733089A CN110605485A CN 110605485 A CN110605485 A CN 110605485A CN 201910733089 A CN201910733089 A CN 201910733089A CN 110605485 A CN110605485 A CN 110605485A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention relates to the technical field of pipe laser cutting, in particular to a method for searching the center of a pipe with a section provided with two unparallel straight edges. A method for searching the center of a pipe with a section having two unparallel straight edges comprises a capacitive height adjuster. Compared with the prior art, the method can finish simple data acquisition by depending on a capacitance type height adjuster on a cutting head in the laser cutting system, can find out the coordinates of the center of the pipe by calculation in the laser cutting system, is an automatic control centering method, and has the advantages of high repetition precision, low cost, convenient use, reliable data precision and the like.
Description
Technical Field
The invention relates to the technical field of pipe laser cutting, in particular to a method for searching the center of a pipe with a section provided with two unparallel straight edges.
Background
After the pipe is clamped by clamping tools such as a chuck and the like before cutting, the center of the pipe cannot be ensured to be just in the center of a rotating shaft of a cutting system due to the performance problems of the pipe shape, the chuck and the like of the clamping tools, so that the deviation of the center of the parameter pipe and the rotating center must be introduced. The deviation between the center of the pipe and the rotation center is an important parameter which needs to be set in the calculation process of the cutter path of the three-dimensional numerical control system, and is an important guarantee for the processing precision. For commonly used tube types: for angle steel, channel-section steel, trapezoidal steel and some other mechanical tubes, it is very difficult to find the tubular product center through the manual mode, and the precision of manual tool setting leads to the processing effect relatively poor, has the risk of damaging the machine even.
Disclosure of Invention
The invention provides a method for searching the center of a pipe with two unparallel straight line edges on the cross section, which overcomes the defects of the prior art, can finish simple data acquisition by depending on a capacitance type height adjuster on a cutting head in a laser cutting system, can find out the coordinate of the center of the pipe by calculation in the laser cutting system, is an automatic control centering method, and has the advantages of high repetition precision, low cost, convenient use, reliable data precision and the like.
In order to achieve the purpose, the method for searching the center of the pipe with the section provided with two unparallel straight line sides comprises a capacitance type height adjuster, and is characterized in that: the specific method comprises the following steps:
(1) clamping the pipe, observing whether an induction head of the capacitive height adjuster is above the pipe, and if not, adjusting the position of the cutting head;
(2) the laser cutting system controls the cutting head to move forwards towards the X axis firstly above the surface 1 of the pipeX, measuring a Z-axis coordinate zp1 of the surface 1 of the pipe by controlling a capacitive height adjuster; then controlling the cutting head to translate in the negative direction 2X, then measuring the Z coordinate zp2 of the surface 1 of the pipe again by controlling the capacitive height adjuster;
(3) the inclination angle of the surface 1 of the pipe is arctan [ (zp1-zp 2)/(2)X)]Controlling the rotation of the rotating shaft-arctan [ (zp1-zp 2)/(2) according to the tilt angle controlX)]；
(4) Surface of the pipeAfter the pipe surface 1 rotates to be horizontal, the capacitive height adjuster is controlled to move above the pipe surface 1 and move towards the negative direction of the X axis, and the coordinate A (X) of the negative direction boundary point of the X axis of the pipe surface 1 is obtaineda，Za）；
(5) Controlling the capacitive height adjuster to move above the surface 1 of the pipe and move towards the positive direction of the X axis to obtain the coordinate B (X) of the positive boundary point of the X axis of the surface 1 of the pipeb，Zb）；
(6) Controlling the pipe to rotate counterclockwiseExecuting the step (2) and the step (3) to rotate the angleThe surface 2 of the pipe is rotated to be horizontal;
(7) after the surface 2 of the pipe is rotated to be horizontal, the capacitive height adjuster is controlled to move above the surface 2 of the pipe, and the step (4) and the step (5) are executed to obtain an X-axis negative boundary coordinate point C (X) of the surface 2 of the pipec，Zc) And X-axis forward boundary coordinate point D (X)d，Zd）；
(8) According to A, B, C, D, the central coordinates of the pipe can be calculated when the surface 1 of the pipe is horizontal;
(9) and adjusting the error according to the calculated error between the center coordinate of the pipe and the mechanical center of the laser cutting system, and performing subsequent cutting procedures.
The pipe is one of angle steel, channel steel and trapezoidal steel.
The pipe is formed by 2 unparallel straight line edges on the cross section.
Said angleIs a known condition.
The central coordinate of the pipe is = [ X ]a + 0.5×Lw , (Za+Zb) ×0.5 - 0.5×Lh]Wherein L iswFor enclosing the length of the rectangle outside the tube, LhThe width of the rectangle surrounding the tube.
Said Lw =max[Lab ，Lab + Lcd*cosα]，Lh = LcdSin α, wherein LabIs the length of the surface 1 of the pipe, LcdThe length of the surface 2 of the pipe is a known condition.
Compared with the prior art, the method for searching the center of the pipe with the section provided with the two unparallel straight line sides can finish simple data acquisition by depending on a capacitive height adjuster on a cutting head in a laser cutting system, can find out the coordinates of the center of the pipe by calculation in the laser cutting system, is an automatic control centering method, and has the advantages of high repetition precision, low cost, convenience in use, reliable data precision and the like.
Drawings
FIG. 1 is a schematic position diagram of a pipe in a numerical control system coordinate system.
FIG. 2 shows the pipe rotating counterclockwiseAnd then the position of the coordinate system of the numerical control system is schematically shown.
FIG. 3 is a schematic view of pipes with different included angles.
Referring to fig. 1, 1 is the tube surface 1, 2 is the tube surface 2, 3 is the tube center, and 4 is the machine center.
Detailed Description
The invention is further illustrated below with reference to the accompanying drawings.
Referring to fig. 1 and 2, a method for finding the center of a pipe with a cross section having two non-parallel straight edges is specifically as follows:
(1) clamping the pipe, observing whether an induction head of the capacitive height adjuster is above the pipe, and if not, adjusting the position of the cutting head;
(2) the laser cutting system controls the cutting head to move forwards towards the X axis firstly above the surface 1 of the pipeX, measuring a Z-axis coordinate zp1 of the surface 1 of the pipe by controlling a capacitive height adjuster; then controlling the cutting head to translate in the negative direction 2X, then measuring the Z coordinate zp2 of the surface 1 of the pipe again by controlling the capacitive height adjuster;
(3) the inclination angle of the surface 1 of the pipe is arctan [ (zp1-zp 2)/(2)X)]Controlling the rotation of the rotating shaft-arctan [ (zp1-zp 2)/(2) according to the tilt angle controlX)]；
(4) After the surface 1 of the pipe is rotated to be horizontal, the capacitive height adjuster is controlled to move above the surface 1 of the pipe and move towards the negative direction of the X axis, and the coordinate A (X) of the negative direction boundary point of the X axis of the surface 1 of the pipe is obtaineda，Za）；
(5) Controlling the capacitive height adjuster to move above the surface 1 of the pipe and move towards the positive direction of the X axis to obtain the coordinate B (X) of the positive boundary point of the X axis of the surface 1 of the pipeb，Zb）；
(6) Controlling the pipe to rotate counterclockwiseExecuting the step (2) and the step (3) to rotate the angleThe surface 2 of the pipe is rotated to be horizontal;
(7) after the surface 2 of the pipe is rotated to be horizontal, the capacitive height adjuster is controlled to move above the surface 2 of the pipe, and the step (4) and the step (5) are executed to obtain an X-axis negative boundary coordinate point C (X) of the surface 2 of the pipec，Zc) And X-axis positive boundary seatPunctuation D (X)d，Zd）；
(8) According to A, B, C, D, the central coordinates of the pipe can be calculated when the surface 1 of the pipe is horizontal;
(9) and adjusting the error according to the calculated error between the center coordinate of the pipe and the mechanical center of the laser cutting system, and performing subsequent cutting procedures.
The pipe is one of angle steel, channel steel and trapezoidal steel.
The tubular product comprises 2 unparallel straight line edges on the cross section.
Angle of rotationIs a known condition.
Center coordinate of pipe = [ X ]a + 0.5×Lw , (Za+Zb) ×0.5 - 0.5×Lh]Wherein L iswFor enclosing the length of the rectangle outside the tube, LhThe width of the rectangle surrounding the tube.
Lw =max[Lab ，Lab + Lcd*cosα]，Lh = LcdSin α, wherein Lab = |Xb-Xa|，Lcd = |Xd-Xc|，LabIs the length of the surface 1 of the pipe, LcdThe length of the surface 2 of the pipe is a known condition.
As shown in FIG. 3, the cross section of the pipe is generally composed of 2 non-parallel straight sides, and the included angle between two adjacent sides of the pipe is formed before the pipe is processedAs known, the error between the center of the pipe and the mechanical center of the numerical control system can be found according to the steps of the method, so that the error can be adjusted.
On the other hand, for a pipe material having a cross section that is not a rectangle surrounded by the surfaces 1 and 2, for example, a deformed steel such as a regular hexagon or a parallelogram, the calculation cannot be performed by the above formula.
However, since the drawing stores the coordinates of each point with the center of the rectangular frame surrounding the cross section as the origin, the coordinates of the center of the rectangular frame surrounding the cross section (that is, the center of the pipe) can be calculated using the four ABCD points, the mechanical rotation center coordinates, and the rotation angle α.
Claims (6)
1. A method for searching the center of a pipe with a section having two unparallel straight line sides comprises a capacitive height adjuster, and is characterized in that: the specific method comprises the following steps:
(1) clamping the pipe, observing whether an induction head of the capacitive height adjuster is above the pipe, and if not, adjusting the position of the cutting head;
(2) the laser cutting system controls the cutting head to move forwards towards the X axis firstly above the surface 1 of the pipeX, measuring a Z-axis coordinate zp1 of the surface 1 of the pipe by controlling a capacitive height adjuster; then controlling the cutting head to translate in the negative direction 2X, then measuring the Z coordinate zp2 of the surface 1 of the pipe again by controlling the capacitive height adjuster;
(3) the inclination angle of the surface 1 of the pipe is arctan [ (zp1-zp 2)/(2)X)]Controlling the rotation of the rotating shaft-arctan [ (zp1-zp 2)/(2) according to the tilt angle controlX)]；
(4) After the surface 1 of the pipe is rotated to be horizontal, the capacitive height adjuster is controlled to move above the surface 1 of the pipe and move towards the negative direction of the X axis, and the coordinate A (X) of the negative direction boundary point of the X axis of the surface 1 of the pipe is obtaineda，Za）；
(5) Controlling the capacitive height adjuster to move toMoving the pipe material surface 1 upwards and towards the X-axis positive direction to obtain the coordinate B (X) of the positive boundary point of the X-axis of the pipe material surface 1b，Zb）；
(6) Controlling the pipe to rotate counterclockwiseExecuting the step (2) and the step (3) to rotate the angleThe surface 2 of the pipe is rotated to be horizontal;
(7) after the surface 2 of the pipe is rotated to be horizontal, the capacitive height adjuster is controlled to move above the surface 2 of the pipe, and the step (4) and the step (5) are executed to obtain an X-axis negative boundary coordinate point C (X) of the surface 2 of the pipec，Zc) And X-axis forward boundary coordinate point D (X)d，Zd）；
(8) According to A, B, C, D, the central coordinates of the pipe can be calculated when the surface 1 of the pipe is horizontal;
(9) and adjusting the error according to the calculated error between the center coordinate of the pipe and the mechanical center of the laser cutting system, and performing subsequent cutting procedures.
2. A method of finding the center of a pipe having a cross-section with two non-parallel straight sides according to claim 1, wherein: the pipe is one of angle steel, channel steel and trapezoidal steel.
3. A method of finding the center of a pipe having a cross-section with two non-parallel straight sides according to claim 1, wherein: the pipe is formed by 2 unparallel straight line edges on the cross section.
4. A method of finding the center of a pipe having a cross-section with two non-parallel straight sides according to claim 1, wherein: said angleIs a known condition.
5. A method of finding the center of a pipe having a cross-section with two non-parallel straight sides according to claim 1, wherein: the central coordinate of the pipe is = [ X ]a + 0.5×Lw , (Za+Zb) ×0.5 - 0.5×Lh]Wherein L iswFor enclosing the length of the rectangle outside the tube, LhThe width of the rectangle surrounding the tube.
6. A method of finding the center of a pipe having a cross-section with two non-parallel straight sides according to claim 5, wherein: said Lw =max[Lab ，Lab + Lcd*cosα]，Lh = LcdSin α, wherein LabIs the length of the surface 1 of the pipe, LcdThe length of the surface 2 of the pipe is a known condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910733089.5A CN110605485B (en) | 2019-08-09 | 2019-08-09 | Method for searching center of pipe with section having two unparallel straight line edges |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910733089.5A CN110605485B (en) | 2019-08-09 | 2019-08-09 | Method for searching center of pipe with section having two unparallel straight line edges |
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| CN110605485A true CN110605485A (en) | 2019-12-24 |
| CN110605485B CN110605485B (en) | 2021-02-12 |
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Citations (8)
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| JP2008040775A (en) * | 2006-08-07 | 2008-02-21 | Hitachi Software Eng Co Ltd | Management/generation method of linear structure shape data |
| CN101581564A (en) * | 2009-06-30 | 2009-11-18 | 奇瑞汽车股份有限公司 | Device for measuring angle |
| CN201353691Y (en) * | 2008-12-29 | 2009-12-02 | 成都鑫兴众力科技发展有限公司 | Automatic center seeking mechanism of nozzle intersection line welding machine |
| CN102798357A (en) * | 2012-08-03 | 2012-11-28 | 福州华友光学仪器有限公司 | Device and method for double-barrelled angle measurement |
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| CN107289885A (en) * | 2017-06-09 | 2017-10-24 | 上海柏楚电子科技有限公司 | A kind of method for determining metal pipe material center |
| CN206784903U (en) * | 2017-06-04 | 2017-12-22 | 中国建筑第七工程局有限公司 | The quick alignment point position of service sleeve |
| CN107655689A (en) * | 2016-07-25 | 2018-02-02 | Lg电子株式会社 | The measuring method of bearing centre error |
-
2019
- 2019-08-09 CN CN201910733089.5A patent/CN110605485B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008040775A (en) * | 2006-08-07 | 2008-02-21 | Hitachi Software Eng Co Ltd | Management/generation method of linear structure shape data |
| CN201353691Y (en) * | 2008-12-29 | 2009-12-02 | 成都鑫兴众力科技发展有限公司 | Automatic center seeking mechanism of nozzle intersection line welding machine |
| CN101581564A (en) * | 2009-06-30 | 2009-11-18 | 奇瑞汽车股份有限公司 | Device for measuring angle |
| CN102798357A (en) * | 2012-08-03 | 2012-11-28 | 福州华友光学仪器有限公司 | Device and method for double-barrelled angle measurement |
| CN104972228A (en) * | 2015-07-03 | 2015-10-14 | 青岛科瑞特激光设备有限公司 | Edge finding method of laser cutting machine for panel |
| CN107655689A (en) * | 2016-07-25 | 2018-02-02 | Lg电子株式会社 | The measuring method of bearing centre error |
| CN206784903U (en) * | 2017-06-04 | 2017-12-22 | 中国建筑第七工程局有限公司 | The quick alignment point position of service sleeve |
| CN107289885A (en) * | 2017-06-09 | 2017-10-24 | 上海柏楚电子科技有限公司 | A kind of method for determining metal pipe material center |
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| CN110605485B (en) | 2021-02-12 |
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Address after: 200241 No. 1000, Lanxiang Hunan Road, Minhang District, Shanghai Patentee after: SHANGHAI FRIENDESS ELECTRONIC TECHNOLOGY Co.,Ltd. Address before: 200240 No. 953 lane, Jianchuan Road, Minhang District, Shanghai 322 Patentee before: SHANGHAI FRIENDESS ELECTRONIC TECHNOLOGY Co.,Ltd. |