Research On CQ2 Thin Cylinder Automatic Assembly System

Cylinders are widely used in modern industrial automatic production lines due to the advantages such as simple structures,high moving speeds and low manufacturing costs.At present,in the mass production of cylinders,fixture-assisted manual assembly is still being used,which has low efficiency and high labor cost.Besides,manual assembly is also used in the production of CQ2 thin cylinders.There are also some problems in the automatic assembly of sealing rings of thin cylinders.The feeding technology of soft O-type sealing rings is not yet mature,and the assembly of C-type sealing rings is prone to torsion or damage.The solutions of these key technologies are particularly important to realize the assembly automation of CQ2 thin cylinders.Therefore,it is of significant importance to study a high-quality,high-efficiency,high-flexibility,low-cost automatic assembly system for CQ2 thin cylinders.In order to solve these problems,a structural design scheme of automatic assembly system for CQ2 thin cylinders is proposed.A series of researches have been carried out for the assembly system,including the study of overall structure scheme,key technologies of automatic assembly system,control system and assembly efficiency experiments.Firstly,the overall technical scheme of the automatic assembly system for CQ2 thin cylinders is studied,according to the structure of CQ2 thin cylinders and technical requirements of the system.Based on the general layout with the bent pattern of the main path,the conveying or feeding methods are determined,such as belt conveying,robot gripping,vibrating bowl feeding,and barrel pushing.The predicted workflow of the system is analyzed.The technical difficulties in the feeding and assembly of sealing rings are analyzed and refined,which lay a foundation for the follow-up research.Some technical problems in the automatic assembly system are studied and solved.A technical method of tilting automatic feeding is put forward,which solves the problems of adhesion,overlap and insertion of O-type sealing ring feeding.The relationship between structural parameters of tilting device and gravity,and the method of applying the pneumatic force are analyzed.The directional intermittent feeding technology is studied according to the feeding rhythm.A mathematic model is established for the feeding mode of the vibrating bowl for C-type sealing rings,and the influence factors of feeding speed are analyzed.The principle and structure of rotating assembly for C-type and O-type sealing rings are studied,which solve the problems of torsion or damage in the automatic assembly of thin cylinder sealing rings.And the rotating assembly technologies of C-type and O-type sealing rings are analyzed and compared.According to the operation requirements of the loading and unloading manipulator in the system,a modular multi-degree-of-freedom pneumatic manipulator is designed and the corresponding path planning is carried out.According to functional requirements of the automatic assembly system for CQ2 thin cylinders,the design of control system is completed.The pneumatic and electrical circuits in control system are designed.A PLC control program is compiled according to the determined workflow of the system.Based on the prototype of the system,experiments are carried out to test the feeding rates of feeding devices and the automatic assembly performance of sealing rings.The experimental results show that the efficiency of automatic assembly system for CQ2 thin cylinders is 241 pieces/h,and the sealing rings are not twisted or damaged in the automatic assembly,which has met the technical requirements of the system.