Virtual Design Of Stress Cutting Mechanism Based On Laser-catalyzed Cracking

Blanking quality directly affects the product quality and working efficiency. Compared with the traditional blanking method, stress cutting method based on crack technology is more efficiency and energy saving. Now, the cutting equipments with crack technology are always specific. They can’t apply with brittle materials and plastic materials at the same time. As for this problem, this paper designed a stress cutting mechanism based on laser-catalyzed cracking with metal fatigue fracture theory, stress cutting theory and laser-catalyzed cracking theory. The main working and results are as follows.(1) Based on cracking technology, stress cutting method and laser-catalyzed cracking theory to analyze the existing stress cutting equipments’shortages and verify the feasibility of laser-catalyzed cracking. Based on this, working principle of laser-catalyzed cracking cutting mechanism was achieved.(2) Designed important parts of laser-catalyzed cracking cutting mechanism and selected laser. Established and assembled3D model of the pre-load mechanism, the groove cutting mechanism and clamping mechanism. Analyzed the assembled3D model of interference and revised the diameter shortages. A completed laser-catalyzed cracking cutting mechanism visual model was achieved.(3) Analyzed the laser-catalyzed cracking cutting mechanism with kinematics and dynamics simulation. Achieved the pre-load mechanism and the groove cutting mechanism’s displace, velocity, acceleration and force characteristics. Analyzed these characteristics can testify the cutting mechanism motion law validity and laser cutting and catalyzed cracking feasibility.(4) Analyzed the modal characteristic of spindle system to testify validity of the dynamic properties and vibration proof performance. Improved the spindle structure and increased the anti vibration ability and dynamic properties. Achieved the natural frequency values and provide reference to avoid resonance.The results show that design based on the laser-catalyzed cracking theory validity was testified with kinematics and dynamics simulation. The motion law, anti vibration properties and dynamic properties meet the needs. Using laser can increase the adaptability of the laser-catalyzed cracking cutting mechanism and meet the needs of brittle materials and plastic materials at the same time. The design concept has great research space and value.