Apply three-dimensional software UG to undertake to car exhaust muffler three-dimensional build a model, its are built in changing DYNAFORM software finite yuan of model, through numeric imitate computation gives semifinished product over all dimension, do not need geometrical maths knowledge, reach the angle range that semifinished product decorates through giving the value that take a side. Find out the means discharging appearance with highest overall material utilization factor automatically, avoided to repeat calculation trivally artificially, compare computational result and traditional method photograph. The result makes clear, this method and result of traditional method computation are main be identical, right complex a computational precision is taller, it is a kind of effective practical method. Foreword has weight as a result of stamping workpiece light, yi Cheng with cost low and distinct advantage, the scale of stamping workpiece increases increasingly. Two when punch craft designs important segment are preform spread out and expect below platoon appearance, how rapid, accurate design not only can managing raw material, and can improve figuration quality and productivity. Traditional design method is to be used artificially constructive law and by practice experience undertakes, not only efficiency is low. And the error is big, cost is high, satisfy the requirement that product cycle shortens increasingly very hard already. Accordingly. Study those who develop punch hardware to spread out reach technology of automatic platoon appearance, have important sense. But the plasticity of the material in process of strike out form is out of shape for mechanism more complex, still come without very good method at present accurately preform configuration appearance. More commonly used method has law of map of law of experience law, skid wire law, situation field imitate, geometry, computer auxiliary plot law, finite yuan of law etc. These methods have a characteristic each, and the limitation with apply limits to get certain. Current and character, to complex the semifinished product of board gold spare parts spreads out computation, finite yuan the law is a kind of computation precision is tall, time is short relative to better method. The punch part that 1 spare parts launchs the appearance that reach a platoon to design flow to be based on DYNAFORM spreads out the appearance that reach a platoon to if the graph shows 1 times,design circuit: The first, build the CAD model of punch spare parts; The 2nd, guide CAD model DYNAFORM builds the person finite yuan of model, undertake finite yuan pre-treatment, finite yuan of analysis and emulation result analysis. 2 three-dimensional the CAD model that builds a model to build stamping workpiece, have two kinds of kind, one kind is to apply the pre-treatment function of DYANFORM to be built directly (the efficiency that build a model is not tall) ; Another kind is to use 3D software (wait like E of ／ of UG, Pro, Catia) the hypostatic model that builds a part, next model of scale of curved surface of spare parts neutral line with definite data pattern (wait like file of Iges, Prt, Dxf) guide DYAN-FORM. Normally the spare parts spreads out H1 take neuter face to calculate, but because exceed position of complex spare parts neutral line,decide harder, this literary grace replaces neutral line with the layer intermediate, intermediate layer by hypostatic model on (or below) the surface is down (or on) half ply of deflection spare parts gets, if gotten intermediate layer model pursues 2. 3 apply DYNAFORM to develop a type 3. Of 1 reseau delimit dispenses is amended guide curved surface of the layer intermediate through module of DYNAFORM ／ BSE and differentiate into travel reseau, before differentiating, undertake installing to reseau parameter above all, the type that basically is unit and unit size (here basically uses quadrangular unit, unit size differentiates for 5 Mm) model, reseau quality information gives out after differentiating. Find out the reseau with bad quality according to information, use repair a tool to adjust reseau (the quality issue that here uses modification unit tool to eliminate presence) reach perfect reseau mass. If the graph shows different picture 3 times,high bright point is quality to differ unit right plan to be the unit that has revised, get through a series of correction, to final and finite if yuan of model pursues 4 are shown. 3. 2 beg the setting that takes preform exterior to undertake figuration parameter above all (the material that includes a part, the ply of the spare parts, and use seek solution implement) , this stamping workpiece uses ST16 data, ply 1.
0 Mm, seek solution implement use revise law of one pace take shape (MSTP) . Emulate through 30 seconds (hardware configures CPU 1. 3 G, the preform external form that if the graph is shown 5 times,receives, its and the preform appearance contrast that use etc method actually to spread out to get, the result comparatives roughly, and more accurate still to result of computation of certain and complex part. 3. Parameter of appearance of platoon of the 3 settings before using the preform external form that develop to undertake appearance discharges appearance discharging (the smallest craft builds Bian Zhili to discharge appearance to decorate means) , check mould design manual to get taking a side be between value workpiece according to the appearance of the spare parts and material property 1. 5 Mm, edge edge 1. 8 Mm, decorate means to consider mould structure uses odd platoon) program of appearance of a few kinds of platoons gets after computation, the plan with amid choice highest overall material utilization factor (81. 22 ％ ) be like a graph as the final structure that discharge appearance show 6 times. 4 conclusion apply DYNAFORM to undertake punch spare parts develops the design that discharge appearance. The procedure is simple, spread out the be identical with gotten semifinished product form and actual can very good condition, and operation time is short, spread out methodological photograph otherly to compare together, this method uses the inchoate design phase of stamping workpiece. Shorten products plan is periodic, and DYNAFORM function is powerful, can further ground undertakes numeric imitate to process of material punch figuration, coach according to imitate result punch mould is designed. CNC Milling