Rotation angle detection current feedback device for welding robot

Abstract

The invention discloses a rotation angle detection current feedback device for a welding robot. The device comprises a bracket fixedly arranged on the base of the welding robot, an annular porcelain bushing fixedly arranged on the bracket, a resistance wire wound on the annular porcelain bushing, a convex post fixedly arranged on the rotating body of the welding robot, and a conductive slip sheet which is fixedly connected with the convex post, wherein the right end of the conductive slip sheet is in overlap joint with the resistance wire. The left end of the conductive slip sheet is disc-shaped and is provided with a central hole; the conductive slip sheet is fixedly connected with the convex post by virtue of a plastic bolt; an insulating spacer is arranged between the conductive slip sheet and the convex post; a limit switch is fixedly arranged on the annular porcelain bushing. The device is applied to an auxiliary detection device of the welding robot, the detection precision is improved, and the reject ratio of welded parts is reduced.

Description

technical field [0001] The invention relates to the field of welding equipment, in particular to a current feedback device for detecting the rotation angle of a welding robot. Background technique [0002] The rotation mode of the welding robot is: the rotation of the welding robot is realized by utilizing the body of the welding robot to rotate relative to the base of the welding robot. The real-time detection of the angle of the existing welding robot is mostly completed by hardware sensors, such as installing a servo motor and an encoder on the motor wheel shaft to detect the rotation angle of the wheel shaft, and multiplying the angle by the wheel diameter to obtain the rotation distance. By comparison, the position coordinates of the welding robot are obtained. Similarly, in the process of acquiring angle information, an electronic compass or GPS navigation component needs to be installed inside the welding robot. Although these methods can obtain the information we w...

AI Technical Summary

Problems solved by technology

Although these methods can obtain the information we want, there are major shortcomings

This method requires accurate knowledge of the geometric parameters of the welding robot (such as wheel diameter, wheelbase), and when measuring angles, sometimes due to interference from signal shielding and component accuracy, the measurement results are not very accurate, and it is also difficult to not very stable

And it is this instability that will cause the welding robot to malfunction, followed by the generation of a large number of unqualified welding parts

Images