Method and equipment for constructing multi-task welding quality diagnosis model

The invention aims to provide a method and device for constructing a multi-task welding quality diagnosis model, and the method comprises the steps: carrying out the model pruning of a first welding quality diagnosis model, and obtaining the pruned first welding quality diagnosis model, the first welding quality diagnosis model is obtained by training based on the first welding sample data and is matched with the first welding task; and a target welding quality diagnosis model is determined based on the pruned first welding quality diagnosis model and second welding sample data, the second welding sample data are matched with the second welding task, and the target welding quality diagnosis model is matched with the first welding task and the second welding task. When a new welding task occurs, model iteration can be performed through incremental learning on the basis of an old model, so that the updated new model adapts to both the new welding task and the previous welding task, the model does not need to be