Research And Development Of Automatic Loading And Unloading Device Of Hot Forging Production Line For Automobile Bearing Ring

In the environment of "made in China 2025" and "industry 4.0",domestic manufacturing enterprises generally need to carry out technological upgrading.Most of the small and medium-sized bearing enterprises in China still adopt the traditional bearing ring forging production line mainly composed of people.With the increase of labor cost and the continuous improvement of customer’s requirements for product quality,the existing processing and production methods have been unable to meet the market demand.Based on the horizontal project of cooperation between the school and the enterprise,this paper studies the automation transformation of the bearing ring hot forging production line proposed by a Forging Co.,Ltd.in Xinchang,Zhejiang Province.An automatic bearing ring hot forging production line is designed and developed to realize the automatic loading and unloading of blank between forging equipment,and the corresponding automatic conveying and positioning device is designed.The specific research contents are as follows:(1)According to the requirements of the transformation,different implementation schemes are proposed and the optimal scheme is selected.This paper analyzes the development status and future trend of the automatic transformation of the hot forging production line.Combined with the existing automatic transformation technology of the forging production line,the existing processing mode of the bearing ring forging production line and the spatial layout of the blank forging equipment of the company,and based on the actual production needs of the company,the automatic loading and unloading device of the existing bearing ring hot forging production line is developed.According to the processing flow of bearing rings,different realization schemes are put forward.Finally,the advantages and disadvantages of the schemes are compared and the optimal realization scheme is selected.(2)The overall design of the automatic loading and unloading device and the overall layout of the automatic forging production line are determined according to the selected optimal scheme.The overall design includes: the design of the automatic loading and unloading device of the pier coarse position press,the design of the automatic loading and unloading device of the extrusion position press,the design of the automatic loading and unloading device of the bottom cutting position press,the design of the automatic loading and unloading device of the ring rolling position press and the design of the automatic loading and unloading device of the integral position press.(3)According to the design scheme,the 3D assembly model of the automatic loading and unloading device of each station is established with the help of SolidWorks software.The optimal structure is obtained by optimizing and adjusting,and then the motion simulation is carried out by using the SolidWorks motion analysis module to plan the motion path of each device.Then,according to the structure design scheme and action stroke of each automatic loading and unloading device,the main parts are designed.It includes the selection and design of common cylinder,lever cylinder,three claw cylinder,clamping claw mechanism and linear module to determine the specific model and size parameters of each part.(4)The overall design of PLC control system of automatic loading and unloading device is completed according to the scheme design requirements.Firstly,the working principle,selection rules and design steps of PLC and HMI are introduced.In terms of hardware,Mitsubishi FX2 N PLC is selected as the control system controller according to the selection rules,and I / O distribution table and PLC wiring diagram are drawn according to the control requirements and control system flow chart;in terms of software,according to the system control requirements and PLC programming principles,PLC programming is carried out with GX works2 software,and HMI operation and monitoring screen are designed on HMIEditor software.(5)Purchase and process spare parts,assemble prototype and build test bench according to the previous design scheme,selected model parameters and drawings of spare parts.Test whether PLC program,linear module,touch screen and all actuators operate normally on the test bench.Debug and set the parameters of linear module to make the device reach a proper running speed.At last,the on-site test is carried out to get the best running speed.Through a series of parameter adjustment and field test,the automatic loading and unloading device designed in this paper can complete the automatic loading and unloading of bearing blank and the automatic transportation task between each station,instead of manually completing the transportation,positioning,loading and unloading operation steps of bearing blank between stations.Through the test,the bearing ring automatic loading and unloading device designed in this paper is of great significance to reduce the labor intensity and improve the production efficiency,and also has a certain reference value to the automation transformation of other forging industries.