| PCB(Printed Circuit Board)was the motherboard that carries various electronic components and played an important role in the electronic information industry.With the development of electronic information industry,the requirement of efficiency and quality of electronic component assembly was becoming higher and higher.Traditional assembly method was manually assembling electronic components,which had low efficiency and poor quality of assembly.There were many automation assembly equipment in recent years.However,this kind of equipment was generally rigid manipulator,which was liable to cause secondary damage to PCB in the assembly process.Therefore,in order to improved the assembly quality and reduced the rejection rate,this paper designed a flexible assembly manipulator for electronic components.The paper was designed for a flexible assembly manipulator based on SolidWorks three-dimensional modeling software for two types of electronic components: safety capacitor and electrolytic capacitor.The manipulator is suitable for a variety of electronic components and has higher adaptability and security than rigid manipulator.The main content of this paper was the selection design of mechanical structure and control system of assembly machinery.The main tasks of this paper were as follows:(1)It was analyzed that the assembling process of electronic components in PCB production line.It was determined that working scheme of capacitance feeding and PCB conveying,and the overall structure of assembling manipulator was designed.(2)The Core Module of Manipulator——Z-Direction Module was structure designed.This paper was put forward for two different schemes of double cam and spline shaft of ball screw,the improved sinusoidal acceleration motion law was determined in the double cam scheme,and the angular displacement,angular velocity and angular acceleration of the motion law were calculated and analyzed.The curve of motion law was obtained.The type selection calculation and action principle analysis of ball screw spline shaft were carried out.Finally,the design scheme of the spline shaft of ball screw was chosen by comparing the advantages and disadvantages of each scheme.(3)Two schemes was put forward for electronic component assembly clamps,and the flexible clamp scheme was selected by comparing the advantages and disadvantages of each scheme.The mechanical structure of the components of the flexible clamp was designed.The finite element analysis was finished for the claw finger and capacitance,and the gap between the claw finger and the electronic component was determined before assembling the electronic component.(4)Finily,the partial control system was selected and designed,including motor driver and sensor selection,and selection and design of PLC. |
