Lamination manufacturing method for large-size and complex-structure metal components

A lamination manufacturing method for large-sized metal components with complicated structures, the method being realized by the following steps:

• step 1. obtaining a three-dimensional digital model of a large-sized metal component with complicated structure, selecting a direction on the model according to service characteristics and the structural features of the large-sized metal component with complicated structure;
• dividing the model into a plurality of slice layers in a direction perpendicular to the selected direction, and selecting the thickness of each slice layer according to the features of the large-sized metal component with complicated structure and the thickness of an actually available metal sheet, at a level of millimeter;
• step 2. selecting the actually available metal sheet corresponding to the thickness of each slice layer divided in step 1, and machining each metal sheet to obtain a shaped sheet consistent with the model of each slice layer in step 1;
• step 3. stacking the shaped sheets obtained through machining of step 2 according to the order of the corresponding slice layers in step 1, placing a connecting agent between two adjacent shaped sheets, constraining positions of all the shaped sheets using a positioning constraint clamp, applying certain pressure in a direction perpendicular to the surfaces of the shaped sheets and connecting all the shaped sheets together using the connecting agents;
• and
• step 4. opening the positioning constraint clamp after all the shaped sheets are connected into a whole to obtain a required large-sized metal component with complicated structure;
• wherein the actually available metal sheets in step 2 are anisotropic sheets;
• when the shaped sheets are stacked in step 3, the anisotropic shaped sheets are placed along different directions of anisotropy.