Recoater collision prediction and correction method for additive manufacturing and system thereof

A recoater collision prediction and calibration system for additive manufacturing, comprising:

• a memory for storing a simulating module and a computing module;
• and
• a processor coupled to the memory and adapted to execute the simulating module and the computing module to perform following operations:
• loading a printing image file through the processor to generate a simulated printing object according to the printing image file;
• performing a thermal stress simulation on the simulated printing object through the processor to obtain a plurality of simulated deformation variables respectively corresponding to a plurality of prediction results of the simulated printing object in a vertical direction on each layer;
• obtaining an experimental collision height of an experimental printed object colliding with a recoater through the processor;
• selecting one of the plurality of the simulated deformation variables according to the experimental collision height through the processor;
• calculating a recoater tolerance according to the one of the plurality of the simulated deformation variables selected through the processor, wherein the plurality of simulated deformation variables includes a type of recoater, a powder laying mechanism, and a driving mechanism of the recoater;
• calibrating a collision risk formula according to the recoater tolerance through the processor;
• and
• predicting a collision risk value between the simulated printing object and the recoater according to the collision risk formula through the processor.