. Planing processing— is a cutting processing method that uses a planing knife to make horizontal and linear reciprocating motion of the workpiece, and is mainly used for the appearance processing of parts. The accuracy of planing processing is IT9~IT7, and the surface roughness Ra is 6.3~1.6um.
. Grinding processing —Grinding refers to the processing method of cutting off excess materials from workpieces with abrasives and abrasives. Grinding is one of the most widely used cutting processing methods.
. Selective laser melting —In a tank covered with metal powder, the computer controls a high-power carbon dioxide laser to selectively sweep the surface of the metal powder. Wherever the laser goes, the metal powder on the surface is completely melted and bonded together, while the powder state remains in the place where it is not shining. The entire process needs to be carried out in a sealed compartment filled with inert gas.
. Selective laser sintering —is the SLS method using infrared lasers as energy, and most of the molding materials used are powder materials. During processing, first preheat the powder to a temperature slightly lower than its melting point, and then spread the powder under the action of a scraping stick; the laser beam selectively sintered according to the layered cross-section information under computer control, and the next layer is sintered after one layer is completed. After all the sintering is removed, a sintered part can be obtained. The mature process materials at present are wax powder and plastic powder. The process of sintering with metal powder or ceramic powder is still under study.
, Metal Deposition —somewhat-like melt deposition, but the metal powder is sprayed out. While spraying metal powder material, the nozzle also provides high-power laser and inert gas protection. This will not be limited by the size of the metal powder box, and can directly produce larger volume parts, and is also very suitable for repairing locally damaged precision parts.
. Rolling forming —Rolling forming method is to use a set of continuous racks to roll stainless steel into complex shapes. The order of the rollers is designed in such a way that the roller shape of each rack can continuously deform the metal until the desired final shape is obtained. If the components have complex shapes, up to thirty-six racks can be used, but if the components with simple shapes are three or four racks, they are enough.
, die forging —refers to the forging method of obtaining forging forging on special die forging equipment. The forgings produced in this method are accurate in size, have small processing allowance, and are complex in structure and high productivity.
, die-cut —that is, the cutting process, the film after the pre-molding process is positioned on the male die of the punching die, the mold clamping removes excess material, retains the product 3D shape, and matches the mold cavity .
. Die cutting process- knife mold —Knife mold cutting process, position the film panel or line on the bottom plate, fix the knife mold on the machine template, and use the force provided by the machine down pressure to control the blade to cut off the material. What distinguishes it from the punching die is that the cut is smoother; at the same time, by adjusting the cutting pressure and depth, the indentation, half-breaking and other effects can be punched out. At the same time, the low cost of molds is more convenient, safe and faster to operate.
0, centrifugal casting — is a technique and method for injecting liquid metal into a high-speed rotating casting mold, so that the metal liquid can fill the casting mold and form castings under the action of centrifugal force. The castings used for centrifugal casting can be selected based on the shape, size and production batch size of the castings. Non-metallic forms (such as sand, shell, or investment shell), metal forms, or castings with paint layers or resin sand layers in the metal forms.
1, disappearing mold casting —a new casting method that bonds paraffin or foam models with similar size and shape to castings, brushes and applies refractory coatings and drys, buried in dry quartz sand to vibrate the mold, cast under negative pressure, gasifies the model, liquid metal occupies the model position, and forms casts after solidification and cooling. Vanishing mold casting is a new process with near-no margin and precise molding. This process does not require molding, no parting surfaces, and no sand cores. Therefore, the casting has no flash, burrs and draft slopes, and reduces dimensional errors due to core combinations.
2, extrusion casting —also known as liquid die forging, is a method of obtaining a molten metal or semi-solid alloy directly into an open mold, and then closing the mold to generate a filling flow and reach the outer shape of the part. Then high pressure is applied to make the solidified metal (shell) plastic deformation . The unsolidified metal is subjected to isostatic pressure, and high pressure solidification occurs at the same time, and finally obtaining the part or blank. The above is direct extrusion casting; there is also a method of injecting the molten metal or semi-solid alloy into the closed mold cavity through a punch, and applying high pressure to make it crystallized and solidified under pressure, and finally obtaining the part or blank.
3. Continuous casting —is a casting method in which liquid metal is continuously poured on one end by a through crystallizer and continuously pulling out the molded material from the other end.
4, pulling is a plastic processing method in which the metal blank is pulled out from the mold hole smaller than the section of the blank to obtain products of corresponding shapes and sizes. Since pulling is mostly done in a cold state, it is also called cold drawing or cold drawing.
5, stamping —is a forming and processing method that relies on the press and mold to apply external forces to the plates, strips, pipes and profiles, causing them to undergo plastic deformation or separation, thereby obtaining workpieces (stamping parts) of the required shape and size.
6. Metal Injection Molding (MIM for short) is a new powder metallurgy near-net forming technology introduced from the plastic injection molding industry. As we all know, plastic injection molding technology produces products of various complex shapes at a low price, but the strength of plastic products is not high. In order to improve their performance, metal or ceramic powder can be added to the plastic to obtain products with high strength and good wear resistance. In recent years, this idea has evolved to maximize the content of solid particles and to completely remove the binder and densify the forming blank during subsequent sintering. This new powder metallurgical forming method is called metal injection forming.
7, turning processing —refers to the lathe processing as part of the mechanical processing. Lathe processing mainly uses a turning tool to turn the rotating workpiece. Lathes are mainly used for processing shafts, discs, sleeves and other workpieces with rotating surfaces. They are the most widely used type of machine tool processing in mechanical manufacturing and repair factories. Turning is a method of cutting the workpiece by rotating the workpiece with respect to the tool on the lathe. The cutting energy of turning processing is mainly provided by the workpiece rather than the tool.
turning is the most basic and common cutting and processing method and occupies a very important position in production. Turning is suitable for processing the rotating surface. Most workpieces with rotating surfaces can be processed by turning methods, such as inner and outer cylindrical surfaces, inner and outer conical surfaces, end surfaces, grooves, threads and rotary forming surfaces, etc. The tools used are mainly turning tools.
