Method for measuring central position of metal pipe

A metal pipe, center position technology, used in measuring devices, metal processing equipment, instruments, etc., can solve the problems of long time, low accuracy, large errors, etc., and achieve the effect of reducing errors and improving cutting accuracy.

Active Publication Date: 2017-10-24
上海柏楚电子科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the manual measurement method has large errors, low accuracy, and takes a long time; when the metal pipe starts to rotate with the cutting system, the center of the pipe will also start to rotate around the rotation axis of the cutting system, and the real-time midpoint of the pipe can be obtained through manual measurement is futile and meaningless

Method used

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  • Method for measuring central position of metal pipe
  • Method for measuring central position of metal pipe
  • Method for measuring central position of metal pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Such as Figure 2-6 As shown, in this embodiment, under the premise of knowing the precise position of the mechanical center of the rotation axis of the metal pipe cutting system, by sampling two points on each side for averaging, the error when the square pipe is in an inclined state is reduced. At the same time, in After the measurement of the eight points is completed, the measurement information is integrated, and the square tube is leveled again to improve the cutting accuracy; in addition, by sampling and comparing the upper and lower sides, the precise position of the center of the tube above the orientation can be accurately calculated.

[0047] Then measure the eight points of the four sides:

[0048] Such as image 3 As shown, the system first controls the cutting head to move to the midpoint Xr in the direction of the X-axis of the rotary machine, and moves to the negative direction of the X-axis for a distance △X (in order to ensure that it does not leave t...

Embodiment 2

[0066] Such as Figure 7-11 As shown, in this embodiment, on the premise that the precise position of the mechanical center of the rotation axis of the metal pipe cutting system is known, one point is sampled on each side, which speeds up the overall measurement speed. At the same time, in the process of switching between different sides, leapfrog technology is adopted. Before the height controller is raised to the highest point, the rotating shaft has already started to rotate, which minimizes the time for centering while ensuring safety. In addition, by sampling and averaging the two planes corresponding to the 180° rotation, the precise position of the tube center above the vertical direction of the two planes can be accurately calculated.

[0067] Measure four points on four sides:

[0068] Such as Figure 7 As shown, the system first controls the cutting head to move to the midpoint Xr in the X-axis direction of the rotary machine, and then the system controls the senso...

Embodiment 3

[0086] Such as Figure 12-17 As shown, in this embodiment, on the premise of knowing the precise position of the mechanical center of the metal pipe cutting system's rotation axis, two points are sampled on the first side, and one point is sampled on each of the remaining three sides, which speeds up the overall measurement speed . At the same time, in the process of switching between different sides, leapfrog technology is adopted. Before the height controller is raised to the highest point, the rotating shaft has already started to rotate, which minimizes the time for centering while ensuring safety. In addition, by sampling and averaging the two planes corresponding to the 180° rotation, the precise position of the tube center above the vertical direction of the two planes can be accurately calculated.

[0087] The method for quickly determining the center of metal pipes is divided into five steps: at the beginning, two points are measured at two positions (Xr+W / 4) and (Xr...

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Abstract

The invention relates to the field of laser cutting, and specifically relates to a method for measuring the central position of a metal pipe. The method comprises a capacitive height adjustment device, and is characterized by comprising the following steps: 1) measuring height H of a metal pipe, width W, and a following distance parameter [delta]F of the capacitive height adjustment device; 2) obtaining an accurate mechanical rotation central position R (Xr, Zr); 3) through height difference, calculating the positions Zc of a first edge and a third edge on an Z-axis direction of the center of an element; 4) through height difference, calculating the positions Xc of a second edge and a fourth edge on an X-axis direction of the center of an element; 5) obtaining the central position of the metal pipe to be (Zc, Xc); 6) leveling the central position of the obtained metal pipe. Compared with the prior art, through sampling a plurality of points on each edge to average, errors of a square pipe in an inclined state are reduced. In addition, through sampling and comparing an upper surface and a lower surface, the accurate position of the center of the metal pipe on the direction can be accurately calculated.

Description

technical field [0001] The invention relates to the field of laser cutting, in particular to a method for measuring the center position of metal pipes. Background technique [0002] In the metal pipe cutting system, the pipe to be cut and the center of the rotation axis of the system are often not the same coordinates in the space coordinate system. When the metal pipe is stationary, the center position of the pipe at this time can be roughly obtained by manual measurement. However, the manual measurement method has large errors, low accuracy, and takes a long time; when the metal pipe starts to rotate with the cutting system, the center of the pipe will also start to rotate around the rotation axis of the cutting system, and the real-time midpoint of the pipe can be obtained through manual measurement is futile and meaningless. Contents of the invention [0003] In order to overcome the deficiencies of the prior art, the present invention designs a repeatable, high-prec...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G01B21/00B23K26/02
CPCB23K26/02G01B21/00
Inventor谢淼罗一尧鞠勇邵达
Owner上海柏楚电子科技股份有限公司