Design And Simulation Research Of Micro Motor Solder Joint Defect Detection System

This paper studies the micro motor rotor solder joint detection is a project in cooperation with Shenzhen Abbott company.Motor is the core component used in automobile motor,household appliances,medical devices and other products.Its quality directly affects the performance of the product.In the manufacturing process of motor,the welding part accounts for more than other parts in the whole motor production process,and its defect detection is very important.Traditional motor rotor solder joint defect detection mainly depends on visual inspection and inspection tools,it is difficult to meet the requirements of industrial on-line production in accuracy and speed,so it is very necessary to manufacture a solder joint defect detection machine.According to the testing standards provided by Abbott company:solder joint spreading area,solder joint climbing height and quality,whether it is full;bonding degree between solder joint and solder joint(whether it is firmly connected);solder joint shape:establish testing standards,whether there is solder leakage.We compared the existing detection methods,some of these defects can not be completed by the two-dimensional vision detection,so this paper uses the grating projection structured light to complete the three-dimensional measurement of solder joints.This paper presents a motor rotor defect detection machine which integrates mechanical design,three-dimensional reconstruction and motion control to realize automatic detection of motor solder joint defects.Through the basic steps of motor detection and sorting,a simple sorting platform is established.Through the practicability,price and required detection efficiency,the hardware of detection and transmission sorting structure is selected in detail.Through the system development of irai external script language c++,the simulation of the overall mechanical structure is completed in the virtual environment to verify the feasibility of the mechanical structure And complete the entity platform construction.In order to improve the detection accuracy,this paper uses a calibration method in three-dimensional space coordinate system to calibrate the whole detection system.The four step phase-shifting method is used to unwrap the wrapped phase,and the improved three frequency heterodyne method is used to unwrap the wrapped phase.According to the parameters calibrated by the system,the point cloud image of the motor pad in three-dimensional space is obtained,and then the pad is processed by radius filtering and plane segmentation fitting to obtain the three-dimensional point cloud information of the solder joint.By investigating the research and development equipment of each solder joint detection manufacturer,according to the detection speed and detection efficiency of the equipment,and the overall equipment development and production cost,this paper compares the solder joint detection equipment in this paper,and verifies the overall experiment.According to the advantages and disadvantages of our existing equipment,this paper looks forward to the future optimization method of the equipment and the suitable factory for direct detection docking with the factory assembly line The modularization method of production.