What is a weld tracking system

Laser locating and laser tracking are the manual teaching welding track through the laser identification weld welding, equivalent to giving the robot a pair of "eyes".

In the process of manual teaching, welding seams are susceptible to deformation, variable clearance and assembly errors, resulting in large weld deviations in the welding process. In order to improve welding quality, real-time control of welding robots is needed to correct weld deviations.

There are three main ways to find weld position: tactile induction, line induction and laser induction:

Tactile sensing: By physically touching the workpiece surface with a line or nozzle to detect the seam, the method is simple but slow.

Line induction: Use a servo motor to quickly move the line up and down as the robot moves along the workpiece. Detects butt welds that are difficult to find with static line or nozzle contact sensing, but requires specific hardware and software.

Laser sensing: Faster than tactile sensing, can detect 1/16 inch thickness of the seam, but the detection of weld clearance has limitations, can not find square butt weld.

Minyue Technology relies on the Tsinghua University team and the Beijing University of Aeronautics and Astronautics team, based on robotics, 3D vision and artificial intelligence cutting-edge algorithms combined with practical problems, launched two-point positioning, three-point positioning, line segment positioning, and other positioning correction functions.

Function one: two point search

Two-point positioning is based on the function of single-point positioning development, you can determine the trajectory and direction of the weld through two points of a weld, so that even if our workpiece has both offset error and rotation error, two-point positioning can also solve your welding problems. Suitable for short weld intermittent welding in the industry, weld rotation error.

Function two: three-point search

The principle of three-point positioning is to establish a new coordinate system based on the workpiece, so as to match the original coordinate system, calculate the position and offset of each weld, and relocate the complex structural parts, which is suitable for our workpiece consistency is good, but there are placement and clamping errors.

Function three, line segment search

Line segment locating, take four points on the workpiece, take two points on any edge, form three line segments, obtain three-dimensional user coordinates through calculation, so as to match with the original coordinate system, calculate the three-dimensional position and offset of each weld.

If there is a large number of the same workpiece, laser locating or tracking is needed to determine the trajectory, and a large number of workpiece errors will certainly occur, the laser is needed to compensate for the error, and the qualified rate of welding can be controlled at more than 90%.