Metal table and chair frame multi-point synchronous welding anti-deformation clamping method and system

Abstract

The application discloses a metal table and chair frame multi-point synchronous welding anti-deformation clamping method and system, and relates to the technical field of table and chair production. The method first constructs a multi-point adaptive pre-positioning matrix, divides a stress area, and determines the corresponding relationship of positioning points, clamping points and welding points; then, multi-point synchronous flexible pre-clamping is implemented on a main load-bearing component, so that the geometric precision of the component is ensured and stress concentration is avoided; a timing-clamping force linkage model is established based on thermal expansion and welding heat input characteristics, and deformation is reduced by using symmetric and cross welding timing; during welding, the parameters of each welding point are synchronously controlled, stress and strain are monitored in real time through a sensor, and clamping force is dynamically adjusted to offset thermal deformation; after welding, the clamping force is unloaded according to a symmetric gradient, and natural cooling is performed to shape. The application can realize collaborative control of welding and clamping, effectively suppresses the welding thermal deformation of the frame, improves the size precision and structural stability of products, and is suitable for automatic welding production of various metal table and chair frames.

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