Digital Design And Forming Process Analysis Of Forming Shoulder

The forming shoulder is the critical part of the vertical forming,filling and closing packaging machine,whose production precision determines the quality of the forming.At present,a mathematical model of forming shoulder is only for one shape,and it’s processing mainly relies on sheet metal welding which lead to low efficiency and poor accuracy.The forming process also lacks systematic research.Therefore,in order to improve the design efficiency of the forming shoulder,this dissertation conducted the following research:Firstly,to address the universality issue of the theoretical model of the forming shoulder,a fully parameterized mathematical model for the bending curve and shoulder surface of the forming shoulder was constructed,considering multiple parameters such as the position and width of the longitudinal seal and the angle of the opening.Secondly,the modeling method of shoulder surface was optimized.Using the joint design method of MFC,UG/Open API and GRIP,a fully parameterized modeling software for forming shoulder was developed based on the UG secondary development platform to achieve visual human-machine interaction and improve design efficiency.Then,ABAQUS was used to simulate the forming process of the flexible film.The correctness of the fully parameterized model was verified,and the force changes of the film in the bending curve region during the forming process were analyzed using circular and rectangular models,the mechanism of arching and wrinkling phenomena during the forming process was clarified,and the optimal range of values for the fillet radius of the bending curve was explored.Finally,considering the processing technology of the forming shoulder,the circular and rectangular models were processed and an experimental testing platform was built.The comparative test between the geometric scanning results of the models and the theoretical models and the forming experiment were conducted.The correctness of the fully parameterized modeling theory was verified.The fully parameterized forming shoulder model proposed,and the special modeling software developed in this dissertation have greatly improved the design efficiency of the forming shoulder,which have important theoretical value and engineering guidance significance.