Design Of Micro Parts Operating Device And Automatic Locking Fixture

The precise assembly of micro parts is one of the key links in the product manufacturing process,and the assembly quality directly affects the performance of the product.At present,the assembly of micro parts mainly depends on manual or semi-automatic assembly,which exists the defects including low assembly efficiency and low assembly precision.Therefore,it is an inevitable trend to realize automatic precision assembly.In view of the assembly task of the pendulum unit in the accelerometer,an automatic precision assembly system is designed by modularization.The assembly system is composed of four modules: the visual module,the assembly operation module,the work table module and the feeding platform module.Modular design can not only enhance the versatility of the assembly system,but also shorten the development cycle of the system.This paper mainly carries on the design of the parts operation device and the automatic locking fixture in the assembly system.As the core component of the assembly operation module,the part operation device is used to pick up,place and locate the parts to be assembled.The clamp is used as the end effector of the parts operating device,acting directly on the parts to be assembled.Aiming at the characteristics of vulnerable parts,this paper selects vacuum adsorption as the driving mode for the end gripper.The integrated gripper and the gas circuit,control scheme for the integrated gripper are designed.In order to further improve the applicability of the gripper,an electromagnetic gripper exchange device is designed.In the assembly process,the end gripper of the part operating device will be affected by the assembly contact force or other external force.By integrating the micro force sensor,the size of the assembly contact force is monitored in real time,and a reasonable structure is designed to avoid the damage of brittle parts.The operation test of the pad and coil is completed by using the parts operating device to verify the feasibility of parts operation.As the core component of the working table module,the automatic locking fixture can realize the accurate positioning of the parts in the assembly process and the tightening,fixing of the components after the assembly is completed.According to the shape,size and positioning features of the parts,the assembly process of the parts is formulated.The basic requirements of the assembly fixture design are analyzed,the overall structure and fixture structure of the automatic locking fixture are designed.Therefore,the fixture can be locked automatically to realize the tightening and fixing of the assembly components.