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2.1.2 pack of levels outlines manufacture technology (LOM)
The LOM technology is through the computer three-dimensional model, the use laser selectively to its lamination slice, will obtain each section outline layer upon layer will cake, finally will fold the addition three dimensional entity product.
Its craft characteristic is takes shape the speed quickly, takes shape the material small advantage, the cost lowly, because does not have changes, therefore does not have the thermal load, the contraction, the inflation, the warp and so on, therefore the shape is stable with an inch precision, after but takes shape the waste material block to strip takes time, specially the duplicate miscellaneous items interior waste material strips. This craft is suitable for the aviation, the automobile and so on and center the volume big workpiece manufacture.
2.1.3 lasers powder electoral district agglutinates takes shape the technology (SLS)
The SLS technology is the computer three-dimensional model through the lamination software its lamination, under the computer control, causes the laser beam basis lamination the slice section information to the powder by the level scanning, scans to the powder agglutinates the solidification (polymerization, agglutinates, caking, chemical reaction and so on), layer upon layer superimposes, piles up the three dimensional entity workpiece. This technical most major characteristic is can at the same time use several kind of different materials (the polycarbonate, the polyethylene chloride, the paraffin wax, the nylon, ABS,The casting granulated substance) makes components.
2.1.4 fuses the deposition to take shape the technology (FDM)
The FDM technology is may squeeze out by the computer control fuses the condition material the spray nozzle, determines the geometry information according to the CAD product model lamination software, squeezes out half flow regime the heat to model the material deposition to solidify the precise actual workpiece thin layer, from bottow to top layer upon layer piles up a three dimensional entity, may make the mold or the product directly.
2.1.5 three dimensional printing take shape the technology (3D-P)
The 3D-P technology controls with the microcomputer to spurt the ink printing head continuously, the basis lamination softweare selectively deposits the liquid cementing material by the level on the powder level, finally piles up a three dimensional entity by the smooth printing two-dimensionalleve. Justs like does not use the laser the fast pattern making technology. This technical main application takes shape in advance in the cermet compound materials porous ceramics on, its goal is produces the mold or the manufacture directly by the CAD product model.
2.2 surfaces take shape the pattern making technology
The surface takes shape the pattern making technology, mainly is the use spurts spreads, the electrolytic casting, chemistry corrosion and so on the new technique formation cavity surface and the fine pattern one kind of craft technology, in the practical application including following several kind of types.
2.2.1 electric arcs spurt spread take shape the pattern making technology
The electric arc spurts spreads takes shape the technical principle is: Has the electric arc quantity of heat using between 2 circular telegrams tinsel to melt the tinsel, depends upon the compressed gas its full atomization, and gives the certain kinetic energy, high speed sprays in the type mold surface, layer upon layer mounts, forms a metal shell, namely the cavity internal surface, uses to fill the substrate material again (generally for metal silt and resin compound materials) performs to support the reinforcement, enhances its intensity and the rigidity, combines the mold together with the metal pattern frame. This kind of pattern making technology craft simple, cost low, manufacture cycle extremely short, the cavity surface takes shape only needs for several hours, saves the energy and the metal material, general cavity surface2-3mm is only thick, simulation greatly strngthened, the pattern precision may achieve 0.5 mum.