Research And Development Of Automatic Assembly Unit Of Hydraulic Valve Group Based On Industrial Vision

For those that exist in manual assembly problems of the hydraulic valve group,such as high labor intensity,low automation level,assembly quality cannot be guaranteed,etc.This paper,detailed analysis the key parts of the equipment,such as feeding mechanism,grasping mechanism,rotary table,tightening mechanism,visual orientation and process quality inspection modules.The design scheme of automatic assembly unit of hydraulic valve group is put forward.The control system of automatic assembly unit is designed.The prototype is made to verify the automatic assembly unit structure of hydraulic valve group and performance of control system.The main work results is as follows:(1)The structure of automatic assembly unit of hydraulic valve group is designed.The traditional manual assembly process of hydraulic valve gr oup is analyzed.Combining features of components,the automatic assembly technological process of hydraulic valve group is developed,and the overall layout scheme is determined.Adopt structural compatibility design,the structure development of key par ts such as feeding mechanism,grasping mechanism,rotary worktable and tightening mechanism has been completed.The difficult problems are solved that such as many kinds of components on the hydraulic valve group,heavy weight and many product models,and then the selection of servo motor and clamping claw is calculated and checked.(2)Aiming at the assembly and positioning accuracy of the mounting hole on the hydraulic valve group,based on machine vision technology,the positioning of valve block hole position is realized and the accuracy of hole coordinates can reach ±0.2mm.Using gray recognition algorithm,the on-line quality inspection of the sealing ring state on hydraulic components is completed.(3)It is based on multiple control components such as robot,tightening shaft and vision system.The software and hardware system of the control system of the automatic assembly unit of hydraulic valve group is designed.(4)The prototype of automatic assembly unit is made.The relevant performance of the prototype is verified by experiments.The results show that the automatic assembly unit of hydraulic valve group meets the design requirements.Unmanned automatic assembly hydraulic valve group assembly,the assembly efficiency was increased by 67% and the quality detection rate reached 100%.