Welding Processing and Heat Treatment Process of 3D Flexible Welding Fixture Platform

The use of 3D flexible combination fixtures in machine manufacturing and welding processing has become increasingly widespread, so the detection methods and error accuracy of 3D flexible welding platforms also need to be understood by people. The detection method of three-dimensional flexible welding fixture platform is simple and economical to measure, and the corresponding measurement accuracy can measure some workpieces that are difficult to measure with general measuring instruments, so it has been widely used. The flatness of the working surface of a three-dimensional flexible welding platform refers to the distance between two parallel planes that contain the actual surface and have a small distance. The allowable tolerance values for the flatness of the working surface of the platform are divided into several levels according to their numerical values, which is called the accuracy of the flatness of the platform. The three-dimensional flexible welding fixture platform is used as a reference plane for measurement or marking, so the flatness of the platform working surface represents the main accuracy indicator of the platform quality.

The main method for detecting the flatness error of the surface of a three-dimensional flexible welding fixture platform is to use a dial measurement method to place the tested platform and micrometer on a standard three-dimensional flexible welding fixture platform. The standard three-dimensional flexible welding fixture platform is used as the measurement reference surface, and the micrometer is used to measure along the actual surface point by point or along several straight lines. The table measurement method is divided into three-point method and diagonal method according to the evaluation reference plane. The three-point method uses the ideal plane determined by the three points far apart on the actual working surface of the tested inspection platform as the evaluation reference plane. During actual measurement, the three points far apart on the actual working surface of the tested inspection platform are first adjusted to the same height as the standard three-dimensional flexible welding fixture platform; When using the diagonal method for actual measurement, first adjust the four corner points on the actual working surface diagonally to equal heights in pairs. Then measure with a micrometer, and the variation measured by the micrometer on the entire actual surface is the flatness error of the actual surface of the inspection platform.

The heat treatment process of 3D flexible welding fixture platform generally includes three processes: heating, insulation, and cooling, sometimes only two processes: heating and cooling. These processes are interconnected and uninterrupted. In the use and processing of the 3D flexible welding fixture platform, main support points and auxiliary support points should be set up. The main support point refers to the part of the 3D flexible welding fixture platform that serves as the main support when in contact with the installation base or bracket during processing, inspection, and use. At this point, the supporting force system is in a static state. The main support point is set for the consistency of the accuracy of the working surface during the processing, inspection, acceptance, and use of the cast iron welding platform. The auxiliary support point refers to the support point added to the platform during use to prevent overturning due to the displacement of the load-bearing center of gravity or deformation caused by excessive load. The supporting force on the auxiliary fulcrum should be less than the supporting force on the main fulcrum. The setting of the main and auxiliary support points of the three-dimensional flexible welding fixture platform is an important factor affecting the accuracy and maintenance of the platform.