Dynamics Analysis Of Waste Circuit Board Crusher And Its Structure Optimization

Due to the rapid development of electronic information technology in the high-tech industry,these industries create relevant interests,but also produce a large number of electronic product waste.Waste e-waste is recognized as the fastest growing and most difficult type of waste in the world.The recycling and secondary utilization of these abandoned circuit boards have also been highly valued by researchers at home and abroad.This paper analyzes the recent research status of waste circuit board crushing and recovery at home and abroad,summarizes the advantages and disadvantages of the existing crushing equipment,and from the perspective of the actual production of the enterprise,conducts a series of dynamic analysis and structural optimization of an existing impact tool crusher,and carries out the crushing process simulation analysis.By analyzing the vibration of the structure and the spindle assembly and the whole component,the crushing device of the impact cutter breaker is relatively simplified,and the theoretical kinetic mathematical model and kinetic differential equation calculation formula are established.By solving this equation,the theoretical natural frequency of impact tool sher is obtained.Then,the model analysis of the impact tool crusher system was conducted using ABAQUS finite element analysis software,and the test natural frequency and the main mode vibration type of the whole crusher system and the main components were obtained.To use the test results to obtain the test natural frequency of the impact tool crushing machine system.The established kinetic model can accurately verify the correctness and effectiveness of the theoretical and simulated natural frequencies.The working frequency of the impact tool crusher is calculated,and the range of possible resonance frequency is determined.The dynamic design and structural optimization of the spindle of the impact tool crusher found that reducing the length of the spindle cantilever from 17 cm to 16 cm and reducing the support distance at the two ends of the spindle from 39 cm to 36 cm could increase the inherent frequency of the machine itself while the other parts are being assembled properly.Structural improvement work includes: adding the rib structure to the rear wall of the storage tank;changing the base to a composite sandwich structure with good shock absorption and noise reduction function;and changing the bearing seat to a more stable triangle structure.Finally,the optimized impact tool crusher is re-3D modeling,and imported into ABAQUS,and reanalyzed to ensure that the impact tool crushing opportunity avoids the working frequency,to avoid the occurrence of resonance phenomenon.The crushing process of the optimized impact tool crusher is simulated,and the crushing process is simulated in the commercial software ADAMS to obtain the maximum crushing force in the crushing process under different material sizes.Ensure that the material/tool collision point to the pin shaft/tool contact point distance must coincide with the collision balance strike center distance,to eliminate the adverse effects of the reaction impact force.It is determined that the crusher is not running enough crushing or excessive crushing at 1400 r/min motor speed.