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Ruiniu welding Hall: What is the difference between laser positioning and laser tracking

Ruiniu welding Hall: What is the difference between laser positioning and laser tracking

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  • Time of issue:2019-06-04
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(Summary description)Many people ask what is the difference between laser position finding, laser tracking and arc tracking, and when will these technologies be needed? What problem can be solved?

Ruiniu welding Hall: What is the difference between laser positioning and laser tracking

(Summary description)Many people ask what is the difference between laser position finding, laser tracking and arc tracking, and when will these technologies be needed? What problem can be solved?

  • Categories:Company news
  • Author:
  • Origin:
  • Time of issue:2019-06-04
  • Views:0
Information

【 Abstract 】 : Many people are asking what is the difference between laser position finding, laser tracking and arc tracking. When will these technologies be used? What problem can be solved?

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Many people ask what is the difference between laser position finding, laser tracking and arc tracking, and when will these technologies be needed? What problem can be solved?

Market Status:

In fact, 90% of the welding robots currently in service on the market work in the mode of "teaching reproduction", and a few work in the way of trajectory planning. That is to say, no matter what kind of products in the welding process should be carried out in accordance with the design data. The theoretical program is programmed and the welding is carried out.

Factors affecting welding effect:

For example, the machining error of the workpiece (the size difference between the workpiece, groove preparation, etc.), clamping accuracy and the thermal deformation during welding and other factors, will cause the welding position deviation, so that the welding quality decline or even failure.

When do welding robots need to be equipped with laser vision?

In arc welding, if the welding accuracy can not be guaranteed to reach ±0.5mm, laser positioning or laser tracking should be considered. To select a laser vision weld tracking system, first of all, it is necessary to verify whether it interferes with the fixture, and secondly, it is necessary to consider whether it will affect the time beat. If not, then it can be fully integrated into the robot workstation.

Solutions:

To break the traditional methods and solve the influence of the above factors on the welding effect, it is necessary to use the laser weld tracking and laser weld locating technology we are going to talk about today.

Basic detection principle of laser vision weld seam tracking

The basic principle of laser weld tracking is based on laser triangulation. The laser emitting line is irradiated to the surface of the workpiece, and after diffuse reflection, the laser profile is imaged on the CCD or CMOS sensor. Then, the collected image is processed and analyzed by the controller, so as to obtain the position of welding seam, which can be used to modify welding track or guide welding.

The following is a comparison of traditional welding and laser tracking technology:

What is laser position finding?

Laser position finding is a process in which a laser sensor is used to make a single measurement of the desired position and calculate the position of the target point.

What is the difference between laser tracking and laser locating?

(1) Compared with laser tracking, the function of laser position finding is relatively simple, and the realization and operation are also relatively convenient;

(2) Generally short welds or the use of laser tracking will interfere with the fixture, the form of laser locating is used to repair the weld;

(3) Laser tracking is installed with the front end of the welding gun, while seeking position and welding.

(4) Laser position finding is detected first and welded later, so it is not suitable for welding the workpiece with severe thermal deformation, and irregular weld with non-straight or circular arc.

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