外文翻译--现代模具制造技术工艺和发展前沿(编辑修改稿)

外文翻译--现代模具制造技术工艺和发展前沿(编辑修改稿)内容摘要：

al parts to shape forming, after hardening, polishing, and then increase in a row under pressure, ~ 10mm/min speed forced to squeeze into the soft annealed steel block, this block in the steel to form the first copy of the extrusion die concave model. This process limited to the most die under pressure and by about 3000MPa annealed steel yield strength limit. (3) Superplastic Extrusion Superplastic extrusion method is the use of materials in the superplastic state to the cavity forming punch extrusion method. At a high state of material plastic extrusion cavity, smooth surface, size precision。 material deformation resistance low, pared with the cold extrusion can reduce the extrusion pressure of about onetenth of a few。 In addition, from design to machining molds have been simplified, material consumption reduction cost reduction die。 die life high. cumulative mold processing method Law of cumulative mold parts processing refers to the shape is continuously added by a certain instruction materials, have been accumulated, including spraying, electroforming, laser processing, such as rapid prototyping and manufacturing processes. Metal Spraying At high temperature and low temperature metal spraying, can be used for smallscale experimental mold. Hightemperature coating (to be added to the 7 oxygencurable metal acetylene flame in the melt), low temperature spray (low melting point alloy to spray release, in the electric ponents under the melting and spraying the surface of the model), the thickness of metal coating for the 1 3mm. When the coating after cooling down, the mother mold is removed from the model (model of at least 2 176。 of angle) to the mold frame mosaic of the cushioning material, the liner can be a low melting point alloy, and can also be aluminum powder mixed with epoxy resin, structural foam mold, and sometimes also used as a cushioning material of cement. Electroforming method Electroforming method, also known as electrolytic deposition, namely the use of electrochemical deposition of the principle of the cathode, in the model of the cathode electrolytic deposition of metal on the way to get the required cavity. When the model removed from the deposition layer, the sediment layer itself formed a shell。 will add a layer of shell enhanced bush, you can Add a template, that is, forming an effective ponent. The advantages of electroforming method is that it can accurately reproduce the surface (even the deep narrow cavity can also be pleted copy) and its dimensional accuracy, and a model can be used to create a number of the same cavity. Its shortings are more timeconsuming, high cost. Rapid prototyping and rapid tooling (RP / RT) Technology Rapid prototyping method is based on the principle of dispersion and accumulation of manufacturing technology. CAD model of parts of it by way of a certain discrete and 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。 by the general spread of the CVD, PVD, PCVD, ion infiltration, such as the direction of the development of ion implantation。 the coating may have TiC, TiN, TiCN, TiAlN, CrN, etc. At the same time, the atmosphere of heat treatment by means of heat treatment to the development of vacuum heat treatment. In addition, the current of the laser enhanced glow plasma nitriding technology and electroplating (plating) and other anticorrosion technology to strengthen more and more attention. Mold detection equipment and reverse engineering With the sophisticated, plex, largescale mold the develop。