Research On Key Technology Of Flexible Manufacturing System For Aluminum Alloy Shell

Intelligent and flexible manufacturing is the inevitable trend of the development of the manufacturing industry in the future.However,due to multispecies and small quantities of the actual production characteristics,aluminum alloy shell parts,which are widely used in the aerospace field,tend to be less automated,have higher production costs and lower production efficiency,let alone intelligent and flexible production.Therefore,the study of such parts automation and flexible manufacturing technology has great practical value.In this paper,a general overview of the flexible manufacturing system for aluminum alloy shell is made,including four sub-units of flexible stamping unit,automatic welding unit,material conveying unit and binocular vision guiding unit.The article focuses on flexible gripper system in automatic welding unit and the handling robot in the transfer unit.The main production process is as follows: The processing of the aluminum alloy shell starts from the introduction of the blank into the flexible stamping unit.After the stamping is completed,the stamping part is grasped by the carrying robot in the transport unit to the automatic welding unit,precisely positioned and then welded by the binocular visual guidance unit,finally finish processing.Secondly,because of the size,property and thickness of aluminum material,the machining effect of the workpiece will be affected.Therefore,in this paper,bending and springback research have been carried out on different materials.Two typical aerospace aluminum 6061 and 2A12 were selected and simulated by DYNAFORM stamping software to obtain the simulation data of stamping force,deformation and springback.According to the result of the simulation experiment,the optimal scheme is selected,which provides an important theoretical basis for the optimization of the post-system.According to the different processing requirements,the corresponding flexible clamping structure is designed on the basis of the screw slide base and the corner positioning,so that the clamping needs of the multi-type aluminum box are satisfied.To further meet the size range of the workpiece,the clamping unit is also optimized.Through the ANSYS finite element software and ADAMS kinematics analysis software,the kinematic analysis and optimization of the clamping structure verify the rationality and practicability of the design.Finally,the coordinate system of the connecting rod of the articulated robot is established by D-H method,the transformation matrix of the robot end effector relative to the fixed base is obtained,and the kinematic positive solution and the inverse solution of the manipulator are solved.Using MATLAB software to simulate the robot arm,according to the Monte Carlo method obtained the arm of the workspace and provides a reference for the overall layout.