【正文】 bee discrete machinable surface, discrete lines and discrete points, then the use of physical or chemical means, the face of these discrete, and the point segments formed by the accumulation of the overall shape of parts, the specific The method is: based on threedimensional CAD model of parts, after the format 8 conversion of its layered slices, the crosssection outline of the shape of each floor, and then use a laser beam selectively curing a layer of liquid photosensitive resin, or cutting a layer of layer of paper or metal foil, or layers of sintered powder materials, as well as the source of the selective use of jet injection layers of the Mongolian hotmelt binding agents or materials, forming the outline of the shape of the crosssection, and then gradually into a threedimensional stacking threedimensional parts. Die Surface Treatment Technology The main trends are: the infiltration of a single element to the multielement codiffusion, plex permeability (such as the TD method) development。 material deformation resistance low, pared with the cold extrusion can reduce the extrusion pressure of about onetenth of a few。 cumulative law by the material continue to increase, the accumulated the necessary physical . Removal of Mold Processing This is the largest mold maker for a class of methods, including machining, EDM (EDM, wire cutting, electrolytic, etc.), chemical processing, such as corrosion. Characterized by the shapesize ponents is removed from the blank material to be redundant. Machining About 90% of the mold by milling, turning, grinding and other machining methods. They are mainly used to mold parts of the final processing aids, as well as working parts of the premold processing and final processing. (1) highspeed machining and milling technology Because the mold cavity often with a large number of freeform surfaces, the traditional handmade has been unable to meet the needs of the linkage of the 2 threeaxis or multiaxis CNC milling machine can solve the maximum extent of the problem in this regard. Therefore, CNC milling and programming tool also naturally bee the focus of advanced manufacturing technology. (2) die cutting and multiaxis joint coordinate processing mode Forming the work surface grinding is a traditional method of finishing with a highprecision, highperformance advantages of degrees. In the mold manufacture, die cut shape is mainly used Ruled Surface finishing punch, die pieces and EDM electrodes and other ponents used. (3) The mold and polishing After surface machining, surface roughness, regardless of their size must be polished again. Mold Polishing Mold current research is still mainly manually or with electric or pneumatic equipment, manually polished, low efficiency, labor intensity, and the quality of instability. China has imported threedimensional surface can be automatic die polishing of the NC Institute mold. Developed humanoid intelligent automatic polishing technology has also been made, but fewer applications. Mold the future research will be towards the special mode, the posite, automation, intelligent direction. Extrusion die, such as research, study mode and laser polishing, EDM polishing, electrochemical polishing, as well as ultrasonic polishing pound polishing equipment and technology. EDM Mold processing technology of electricity mainly refers to wire cutting, EDM, piercing and electrolysis processing. (1) WEDM Cutting EDM spark discharge using metal melting or vaporization, and melting or vaporization of the metal to get rid of in order to achieve a variety of shapes metal parts processing. Wirecutting for processing small precision, plex shapes, materials, special die parts, the more plex shapes, small precision dies, carbide 3 dies in particular, its economic effects has bee more significant. MicroEDM and Wire Cutting walking is the main development of hot spots in recent years. (2) Cavity EDM EDM cavity forming a replication process, it is the use of spark discharge method to copy the shape of tool electrode in the blank mold cavity formed. EDM cavity mold in today39。 forming method the same total amount of material through the flow of materials and get the body。21 Century Manufacturing Enterprise Strategy that by 2020 the automotive industry to achieve agile manufacturing / virtual engineering solutions to automotive development cycle shortened from 40 months to four months. chemical etching process Chemical e