Force Analysis And Optimal Design Of The Basic Element Of The CNC Forming Device For Hull Plate

For a long time, many scholars and researchers from inland and abroad wantedto realize the automation of hull plate stamping processing, but they failed.On thebasis of previous studies, based on “the Reconfigurable Die with Rotable SquarePress Head and No-pair Press Mode”, the Shipbuilding Technology ResearchInstitute of Wuhan University of Technology designed and manufactured the“Three-dimensional Computer Numerical Control(CNC) Forming Device for HullPlate”. Its advanced design concept, the reliable running device, excellentperformance, is very suitable for continuous work for a long period of time. And itcan process the fair and almost none creasing three-dimensional curved surface platewith high quality and high efficiency. It can completely meet the requirements of thedevelopment of the digital shipbuilding production of the shipyard.“The Reconfigurable Die with Rotable Square Press Head and No-pair PressMode” is the core of “the Three-dimensional Computer Numerical Control(CNC)Forming Device”. The squeeze head that can rotate around the hollow pillar offundamental body is the key of forming device. At the beginning of the developmentof “the Three-dimensional Computer Numerical Control(CNC) Forming Device forHull Plate”, out of respect for the safety, the selection of basic body size was moreconservative. In this paper, through the numerical simulation of CNC forming devicebasic body force, designed to optimize the basic body size. In this paper, the mainwork done is as follows:1）And conclusion is drawn that when the height difference between the basicelements is10mm,20mm,30mm,40mm respectively, the maximum pressure almostnot changed, from that we can know that the pressure of the hollow pillar is notinfluenced by the height difference between the basic elements.2）Optimizing the size of hollow pillar in guarantee that the contact area betweenthe basic element and the rolling hemisphere pressure head. On the basic ofcalculating and numerical simulation that when the inner diameter is increased to44mm,and the depth between the rolling hemisphere pressure head and hollow pillaris increased by3mm,the maximum rotatable angle can reach to49°. 3）Using ANSYS/LS-DYNA program, simulate the stamping process of theComputer Numerical Control(CNC) Forming Device for Hull Plate, ther maximumstress of the hollow pillar is larger than the value obtained by ANSYS static analysis,but the difference is not too big. Considering the speed is quicker than actualstamping processing that forming a lot of inertia effect, although dynamic analysisresults have deviation with the actual result, but it is reliability, also verify theaccuracy of the static calculation from the other side.`...