【文章內(nèi)容簡介】 axle shaft gear, star type wrap, cross axle and so on if uses the machining method, Not only the material use factor is very low (equally not to 40%),Moreover consumes the manhour, The production cost is extremely high. Overseas uses the unenlightened fing technology to produce these only shape fing, Omits the major part machining, the cost large scale reduces. The cold fing technology development mainly is develops the high added value the product, Reduces the production cost, At the same time, It also in unceasingly to the cutting, the powder metallurgy, the casting, the hot fing, domain seepage and so on sheet forming craft or displaces, Also may unify the constitution pound craft with these crafts. Like the literature [4] proposed hot fing cold fing pound plasticity forming technology. The hot fing cold fing pound plasticity forming technology is one kind of new precise metal forming craft which unifies the hot fing and the cold fing, it has fully used the hot fing and the cold fing respective merit: Under the thermal state the metal plasticity good, the mobile stress is low, therefore the main distortion process pletes with the hot fing。 The cold fing precision is high, therefore the ponents important size finally forms the ponents with the cold fing craft. The hot fing cold fing pound plasticity forming technology appears in the 1980s, since the 9039。s have obtained the more and more widespread application, with this technical manufacture ponents, have obtained the precision to enhance, the cost reduction good effect. Chart 1 Chart 2 Chart 3 Chart 4 3 、 values simulations technology uses in the rationality which examines the craft and the mold designs. When with cold fing craft forming ponents, because the metal in cold condition under has the plastic deformation, its resistance to deformation very big, therefore, ponents distortion quite difficult, in the distortion process is easy to appear the metal to be sufficient does not fill, the fing has flaw and so on crack. At the same time, the oversized resistance to deformation can seriously reduce the mold the service life. Since long ago, our country metal plasticity forming technological design and the mold design always uses the tradition to depend on the experience, the experimental technique. This design method satisfies only the shape manufacture craft request with difficulty. Along with the puter technology rapid development and the 7039。s plastic finite element theory development, in many plasticity forming process is very difficult the question which solves to be possible to use the finite element method to solve. In cold fing forming craft domain, through modeling and appropriate boundary condition determination, The finite element value simulation technology may very directviewing obtain the flaw situation which the metal mobile process the stress, the strain, the mold stress, the mold expiration situation and the fing possibly appears. This important information obtaining to reasonable mold structure. The mold selection, the heat treatment and the formed craft plan finally determination has the important guiding sense. The present effective value simulation software was establishes take just the plastic finite element method as the foundation. This software include: DEFORM, QFORM, FORGE, and MSC/SUPERFORM and so on. Use in the rationality utility the finite element value simulation technology which examines the craft and the mold designs. Like the literature [ 5 ] proposed one kind forms the straight tooth cylindrical gears by the hollow billet the new craft: Hammers the divergence area divergence end to hammer in advance, Has conducted the value simulator study with three dimensional finite element value simulation software DEFORM3DTM, Obtained the fing load traveling schedule curve as well as the entire forming process stress, the strain, the velocity distribution and so on, and pushed the craft simulation result with the traditional closed type to carry on the parison. The analysis indicated, the traditional closed type pushes the formed straight tooth cylindrical gears, the formed load is big, does not favor the tooth profile filling. Uses of hammers the divergence area divergence end to hammer the new craft in advance, May large scale reduce the formed load. And the distinct improvement material fills the nature, May obtain the tooth profile angle department full gear. The literature [6] has carried on the value simulation with the three dimensional big distortion ball plastic finite element method counter gear cold finish fe forming process. To as hammered in advance take the closed type drop fing with by the closed type drop fing, the hole of divergence and the restraint divergence two steps of formed patterns distortion mobile situation which hammered for the end has carried on the value simulation analysis. The numerical analysis result and the craft experiment indicated hammers in the end and adapt to the divergence. Restrains the hole of divergence measure regarding to reduce the work load and to enhance the angle corner in particular to fill aspect and so on ability is extremely effective. 4 、 Digitized intelligences design system application 、 CAD/CAM technology in cold fing forming craft/In mold design application In order to adapt the modern production the short cycle which develops to the fing die, high grade, the low cost request, the advanced design theory and the method as well as puter technology, in particular the CAD technology introd