A method for testing and controlling process parameters of robot resistance spot welding

Abstract

The invention relates to the field of mechanical welding, in particular to a robot resistance spot-welding technological parameter testing and control method. The robot resistance spot-welding technological parameter testing and control method comprises the steps that S1, measuring position transfer verification is carried out; S2, empty spot welding is carried out; S3, actual measurement is carried out; S4, a program position output parameter of the S2 and an actual position output parameter of S3 are subjected to parameter linearization; and S5, a technological parameter setting value is verified. The robot resistance spot-welding technological parameter testing and control method has the following beneficial effects that according to the technical scheme, the robot resistance spot-welding technological parameter testing and control method comprises empty spot and practical spot welding parameter comparison verification, so that the parameter output conformability of the parameters on the two situations is ensured; a fixing bracket of a welding testing instrument is designed and manufactured, so that artificial participation is reduced, and the operational safety performance is improved; a welding test piece fixing bracket is designed and manufactured, so that the history that a welding test piece can not be verified is ended; robot parameter definitions are increased, and welding current and welding pressure test automation separation is realized; and a robot program is designed and written, so that the operational flexibility is ensured, and personnel participation is reduced.

Description

technical field [0001] The invention relates to the field of mechanical welding equipment, in particular to a method for testing and controlling process parameters of robot resistance spot welding. Background technique [0002] The welding gun controller mainly defines the welding parameters controlled mainly including welding current, welding time and welding pressure, and the welding time and welding pressure are non-closed-loop control, so the difference between the set value and output value is large; the welding current is closed-loop control, the actual output There is a difference between the measured value and the robot's measured value, and it is also affected by the measuring element, so the consistency between the set value, the measured value of the robot itself and the actual output value cannot be guaranteed. [0003] At present, there are two methods of measuring robot spot welding parameters at home and abroad: the first one is shown in the attached figure of...

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Problems solved by technology

[0002] The welding gun controller mainly defines the welding parameters controlled mainly including welding current, welding time and welding pressure, and the welding time and welding pressure are non-closed-loop control, so the difference between the set value and output value is large; the welding current is closed-loop control, the actual output There is a difference between the measured value and the robot's measured value, and it is also affected by the measuring element, so the consistency between the set value, the measured value of the robot itself and the actual output value cannot be guaranteed.

[0003] At present, there are two methods of measuring robot spot welding parameters at home and abroad: the first one is shown in the attached figure of the abstract, the robot operator manually operates the robot, and the process parameter engineer measures the parameters at the actual welding position, and at the same time finds the corresponding parameter number of the robot call. The parameter value and process setting range value, the welding current needs to be turned off manually during the welding current test, and then measured at the spot welding position of the robot. The advantage of the operation method is that it can accurately and effectively realize the parameter measurement. Too many people, poor safety performance, etc.; the second method is to read the parameter value directly through the robot welding controller. The advantage of this method is that it can complete the rapid measurement of the parameter. The disadvantage is that only the welding current has closed-loop feedback, so only the current value Certain reference, but the actual output value is not known, so the reference is not very meaningful

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