Development Of Laser Automatic Marking Equipment For Automotive Wheel Hub Bearing

With the rapid development of computer technology,automatic control technology,transmission technology and CAD technology,automatic identification technology has been widely used in a large number of modern production processes.Because the automobile hub bearing has a significant impact on automobile performance and safety,it is very necessary to establish its quality management system for accurate traceability,and the clearly marked and identifiable production information is the key step of establishing the quality management system.The traditional marking method is mainly semi-automatic,which has great limitations.There are not only deficiencies such as high labor intensity,low efficiency and unclear marking,but also the content of marking is mainly letters,numbers or a combination of both,which is difficult to carry the complicated production information of hub bearing.In order to solve the above problems,a laser marking equipment is developed to realize the automation of marking the inner and outer rings of automobile hub bearings.The research of this subject solves the problems of difficult positioning of wheel hub bearing,low marking efficiency,low degree of automation and unclear marking,and realizes the design objectives of compact mechanical structure,friendly human-computer interaction interface and stable communication between PLC and laser engraving machine.The specific research contents of this thesis are as follows:(1)Firstly,this thesis summarizes the research status of automatic marking system at home and abroad,defines the technical indicators and design principles of the enterprise,and determines the whole scheme,marking mode and content of the marking equipment.(2)After the scheme of the whole machine is determined,the design of each mechanism is carried out,the function of each mechanism is clarified,and the flexible design is carried out in the structure,which is suitable for various types of hub bearings.The finite element software and dynamics software are used to analyze and optimize the mechanism,and the key parts are analyzed to check whether the strength and stiffness meet the safety requirements.(3)The electrical control system with PLC as the core is determined,the reliable pneumatic system and friendly man-machine interface are designed,the communication method between PLC and other electrical components is clarified,the hardware system design and software programming based on PLC are completed,and the hardware configuration and software program are briefly explained.(4)After assembling the marking equipment in the laboratory,conduct power on test to improve the problems.Then it is installed on the production site of the enterprise for commissioning and operation.According to the problems arising from the operation results,the equipment is improved and improved until the improved equipment meets the production requirements and technical indicators of the production line,and the factory delivery is completed.