576 results about "Roughcast" patented technology

The invention discloses a processing method of a metal middle frame mobile phone shell structure and relates to the technical field of processing of mobile phones. The processing method comprises the following steps: A, stamping a blank of the metal middle frame by using a metal plate; B, milling an auxiliary antenna area on the blank of the metal middle frame in a CNC manner and retaining a connection position; C, forming a metal bottom shell by using an aluminum die casting manner; D, connecting the blank of the metal middle frame with the metal bottom shell to be a whole body; E, forming a main antenna area on the blank of the metal middle frame by using an injection molding manner; and F, milling off the connection position on the blank of the metal middle frame in the CNC manner to obtain the metal middle frame mobile phone shell structure. By combining processes of stamping molding, injection molding and CNC processing, the metal middle frame mobile phone shell structure is processed; the metal middle frame mobile phone shell structure is stable in process, high in production efficiency, short in processing time and low in production cost.

The present invention discloses precise investing process of super long low pressure partition guide blade of stainless steel for turbine. Crankled stainless steel guide blade with length up to 960 mm and weight up to 42 kg may be manufactured through investing process. The present invention adopts pre-deforming profiling design and improved investing process and the produced guide blade for 600 KW steam turbo generator has high performance. The investing process includes making wax mold, making shell, smelting and casting, and heat treatment.

The invention discloses a manufacturing method of a single-layer brazing diamond grinding wheel. The manufacturing method includes steps of preparing a base body of the diamond grinding wheel by a machining method, deoiling and descaling; utilizing mixture of Cu powder, Sn powder, TiH2 powder and WC (wolfram carbide) powder as brazing filler metal of the diamond grinding wheel, and mechanically blending uniformly; sequentially arranging the base body, the brazing filler metal and diamond grains of the diamond grinding wheel to manufacture a tool forming blank; placing the tool forming blank into a vacuum furnace, subjecting the brazing filler metal and the diamond grains to chemical reaction by means of brazing process, cooling to the room temperature along with the furnace, and discharging. Cost for raw materials can be reduced to some extent and oxidation pollution can be avoided by utilizing TiH2 as a Ti source, wear resistance and heat resistance of the brazing filler metal can be improved by adding the superfine WC powder into the Cu powder, the Sn powder and the TiH2 powder, graphitization of diamond can be reduced, thereby heat damage of the diamond can be reduced, and the diamond grinding tool can sufficiently give into play.

The invention relates to the field of paint coating processes, in particular to a paint coating process for wooden furniture. The paint coating process for the wooden furniture comprises the followingworking procedures: (1) scraping, (2) blank treatment, (3) plastering, (4) primary polishing, (5) base material coloring, (6) base paint spraying, (7) secondary polishing, (8) colorant coating, (9) secondary base paint spraying, (10) third polishing, (11) tinting, and (12) finish paint spraying. The paint coating process for the wooden furniture provided by the invention overcomes the defects that the blank treating and polishing time is long and the plane is not easy to be smoothened, improves the color definition of the furniture, and improves the visual effect and appreciation of the furniture.

The invention provides a manufacturing method of a large size thin-walled titanium alloy cylindrical part, comprising the steps of: (1) raw material powder selection; (2) powder loading and encapsulation; (3) hot isostatic pressing; and (4) cylindrical part blank processing. The invention also provides a cylindrical mould used for manufacturing the large size thin-walled titanium alloy cylindrical part, comprising a cylindrical outer sheath and a cylindrical inner sheath. A cavity for loading titanium alloy powder is formed by the outer sheath and the inner sheath, and the inner sheath is internally provided with a cylindrical shaped mould; an upper sheath cover and a lower sheath cover for encapsulating the cavity are respectively fixed at the top end and the bottom end of the cavity for loading titanium alloy powder; and the upper sheath cover is also provided with a gas removing pipe. Different from a plurality of traditional manufacturing methods, the invention can simultaneously meet the requirements of high performance, no defect, large size thin-wall, large length-diameter ratio, high precision, low cost, and the like.

The invention discloses a glaze material for Jun red glaze and a process for preparing Jun porcelain from the glaze material. The glaze material consists of the raw materials of melilite, quartzite, calcite, white feldspar, copper ore, ZnO, SnO, GuO, talc, BaO, zirconium silicate and spodumene. The preparation process comprises the following steps: firstly, smashing roughcast raw materials and conducting moulding to fire a plain roughcast, then immersing the plain roughcast into slurry of the glaze material of the Jun red glaze for glazing, and when the slurry adhered on the surface of the plain roughcast is dried, putting the plain roughcast in a kiln for firing, so as to obtain the Jun red glaze Jun porcelain. According to the glaze material for the Jun red glaze and the process for preparing the Jun porcelain by utilizing the glaze material, spodumene and zirconium silicate are added in the glaze material for the Jun red glaze, so that the fired Jun red glaze Jun porcelain is bright in color, mild and smooth in glaze surface, and uniform in cracking, and breaks through the condition that the general Jun red glaze Jun porcelain is dim in color and nonuniform in cracking; the Jun porcelain is taken as the specialty of China, and represents the advanced level of the manufacture process of China, and the social value of the Jun porcelain is improved.

The present invention discloses a reinforced internal layer particle cylinder sleeve and a manufacturing method thereof. The reinforced internal layer particle cylinder sleeve comprises a cylinder sleeve substrate which comprises a radial inner reinforced layer and an outer non-reinforced layer. The reinforced layer consists of reinforced particles distributed in the cylinder body substrate. The reinforced layer and the non-reinforced layer are combined by an alloy combined transition layer. The transition of the reinforced layer and the non-reinforced layer of the present invention is uniform, slow, stable and firm, thereby prolonging the service life of the cylinder sleeve; the cylinder sleeve has light weight, low porosity factor and good mechanical performance and thermal performance and improves the working efficiency of an engine; the manufacturing method has simple technical process and high production efficiency; the content of the reinforced particles in the non-reinforced layer is zero, thereby increasing the wearability of the inner layer and also causing no influence on the integral mechanical performance of the cylinder sleeve, such as the intensity of tension, and the like; the cylinder sleeve uses a centrifugal casting method to form an inner layer particles segregated roughcast and then is made by the heat treatment and mechanical cutting, processing and manufacturing of the roughcast.

A precision-investment casting method of a titanium aluminum base alloy aircraft engine blade relates to a preparation method of an aircraft engine blade and solves the problems of easy deformation, complicated processing procedures and low processing efficiency caused by the thin aircraft engine blades with diverse shapes when the existing blank processing mode is adopted. The invention adopts a water jacketed copper crucible vacuum induction melting centrifugal casting method to realize the preparation of the titanium aluminum base alloy aircraft engine blade. The aluminum content of the titanium aluminum base alloy is 46-48at%. Under vacuum argon shield, the melting is implemented and the melting power is 330-350kW in the melting process. With the centrifugal casting technology adopted, the casting is carried out by adopting a bottom casting type casting system and a casting system composed of blade type shells. The preheating temperature of a casting type shell is 400-600 DEG C and the shell cools with a furnace after casting, and the oxygen content of the alloy is 0.04-0.08% after casting. The method is simple in technology, low in processing cost and is applicable to processing various aircraft engine blades.

The invention discloses a process for forging and molding three connecting kits of a bearing ring roughcast. On equipment which is put in an I-shaped arrangement, a metal material section is sent to an intermediate frequency heating furnace of equipment 1; after the heating temperature of the metal material section reaches between 1,200 and 1,250 DEG C, the metal material section is sent to the equipment, is subjected to continuous upsetting, back extrusion, punching and ring rolling; and the bearing ring roughcast after chambering is subjected to finishing and correction to complete the processing of the first kit, the second kit and the third kit (the ring roughcasts). The process for forging and molding three connecting kits of the bearing ring roughcast can fully utilize residual materials, achieve effective conservation of the materials, simplify the production process, improve production efficiency and complete the production of a plurality of forging pieces of the bearing ring roughcast on one production line under the condition of not increasing the consumption of the raw materials.

A roll typed impact extrusion processing method and a device of automobile drive axle housing adopts roll typed impact extrusion technique to manufacture a lute-shaped housing expanded from the middle of the driving axle housing, namely, axial compressive force is loaded to the both ends of the axle housing roughcast or the semi-finished product; in the forming die, dedicated roll pressured rolling of the driving gear is adopted to implement repeated rolling and progressive roll typed impact extrusion operation to the inner wall of the workpiece, and processes the workpiece into the needed axle housing shape. As a lute-shaped hole of the middle of the axle housing is molded by reaming and roll typed impact extrusion technology, the volume of the metal material is progressively transferred a plurality of times, and the thickness of the deformation part of the material basically remains the same, so that the metallurgical structure of the steels of the area is compact, furthermore, surface hardening greatly strengthens all the mechanical performance of the corresponding parts of the axle housing body, and improves the integral mechanical strength and rigidity of the axle housing. The method has the advantages of simple technique, convenient operation, little investment of the dedicated device and die, reliable work, and simple and easy product model conversion, which is suitable for batch produce with a plurality of varieties.

A 2-in-1 machining way for a narrow thin-wall bearing ring. Wherein, a blank of two narrow thin-wall bearing ring is clamped integrally on a chuck of a lathe, the I.D., O.D., ends of the blank are turned, chamfered, then heat treatment is carried; after heat treatment, grinding is carried out; after that, the two bearing rings are cut apart. The specific machining procedures are: clamping and positioning one end of a forged and preliminarily formed blank, turning and chamfering the end face, ID, OD of another end; then changing another end for positioning and clamping, turning and chamfering the end face, ID, OD; carrying out heat treatment, grinding after heat treatment; cutting along the cutting interface, finishing the cut at the cutting interface; carrying out aging treatment. The invention solves the problem of warpage and deformation at hardening of narrow thin-wall bearing rings, improves the production efficiency and improves the utilization rate of raw materials.

The invention discloses a kind of none asbestos clutch facing used in cars and its production technology. The recipe of the component is that: E-glass fiber 30~50%, fragrance fiber 1~4%, polyacrylonitrile fiber 0.6~1.2%, the oil of cashew shell friction-type mix 3~6%, oil coke blacking 3~5%, particle graphite 5~8%, zinc oxide 0.2~1%, calcium sulfate 5~15%, heavy calcium carbonate 10~20%, flour acrylonitrile butadiene rubber 15~25%, anti-aging protective TMQ 0.2~0.5%, curing accelerator MBTS 0.2~0.5%, the oil of cashew shell resin modified 6~12%. Banburying mix the component told above in proportions at the proper temperature then make up pellicle by smelting and at last rolls in with the E-glass fiber then forms different ordinance blanks by winding. The blanks confect by heat pressing at the proper temperature and pressure then make into production by grinding and drilling holes. It has the merits like that: high strength, good ductility and stabilize coefficient of friction and so on.

The invention discloses a method for manufacturing an outer ring of a tapered roller bearing, comprising the following steps of: a: taking a material: setting the quality of the finished product outer ring as M, setting the outer diameter as D, taking a bearing steel pipe with the outer diameter of D1 as the raw material, taking the bearing steel pipe with the quality of M1 and meeting the condition that one half of D is less than or equal to D1 which is less than D, and M1 is equal to 2M plus M2 plus 2M3, wherein M2 is the margin of quality by cutting, and M3 is the margin of quality of single outer ring by grinding process; b: cold rolling: rolling on the bearing steel pipe taken in the step a for obtaining a combined blank of the outer ring; c. cutting: cutting the combined blank at the connecting ring for obtaining a single blank of the two outer rings; d: thermal processing; and e: finish machining: grinding the single blank of the outer ring. The proposal leads the outer ring of the tapered roller bearing to realize the cold rolling for shaping, has the advantages of small material loss, saved energy consumption, simple process, high production efficiency and the like, and simultaneously ensures the product quality.

The invention discloses a camshaft sand mould for manufacturing coated sands, which takes regenerated sands as base sands. The invention is characterized in that the invention is a passing shaft which is composed of an upper sand mould of the coated sands and a lower sand mould of the coated and, and provided with a boss in the middle portion. A manufacturing method comprises firstly, enabling waste sands to regenerate under high temperature, secondly, producing the regenerated sand, thirdly, taking the regenerated sands as the base sands and producing the coated sands, fourthly, heating the mould to 290-310 DEG C, fifthly, inbreathing the coated sands into the camshaft sand mould through compressed air, heating for 110-130 seconds, and curing into the mold, sixthly, obtaining an intact camshaft sand mould after adhering the upper sand mould and the lower sand mould. The superiorities of the invention lie in that blank dimensions of camshaft casts can be more accurate and process redundancy can be minimized due to the low thermal expansion rate of the sands, and cost can be saved. Defects of casts as air holes can be lowered due to low air forming property, and simultaneously effects to environment can be minimized, deformation and cracks of sand moulds can be avoided due to high strength, which is beneficial to arrange and transport, and the quality of cast surfaces can be increased. Flow ability can be improved, and defective indexes of the casts can be lowered. The invention has high strength, smooth surface and good breathing property.

A dental mill blank is formed from a number of different self-supporting, malleable, curable (SMC) materials distributed within the blank so that a dental article machined from the blank closely resembles natural dentition in appearance or function. When in an uncured state, a single mill blank can be adapted to fit a variety of different tooth sizes and shapes, thus reducing the inventory of mill blank types required for fabrication of the range of possible tooth shapes and sizes.

The invention relates to a toilet cover and a surface coating technique of other complete bathroom accessories. The technique comprises the following steps: rough machining, sanding, coating and gluing, vacuum coating or pressure high polymer printing film applying, burr trimming, decorating, accessories assembling and packaging. In respect of the production technique, the original high polymer printing film is taken as a production mold, thus causing the mold to be the external surface of a product, without painting for surface finishing and decorating. In such a way, environmental pollutionand impact on worker health caused by sanding and painting spraying and decorating can be avoided during the manufacturing process of a wooden closestool and other complete bathroom accessories, thuscompletely overcoming the disadvantages of sanding and spraying of traditional technique, simplifying production processes and beautifying the surface decoration of the product. An LED illuminant canalso be embedded to beautify the surface of the product.

The invention provides a manufacturing method of a lost-foam casting foaming mold. The invention is characterized in that the manufacturing method comprises the following steps: firstly, the three-dimensional CAD model of a casting part is manufactured, and a colophony prototype used for casting a blank of the foaming mold is manufactured through a rapid molding machine; secondly, a colophony prototype used for casting an electric spark working electrode is manufactured; thirdly, the inner cavity structure of the blank of the foaming mold is copied by using a colophony prototype with the same size with the casing part and silica gel; fourthly, the blank of the foaming mold is cast by using the composite ceramic shell casting technology; fifthly, the electric spark working electrode is cast by using the colophony prototype for enlarging the size of the casting part by 0.5-1.5 mm and the composite ceramic shell casting technology; and sixthly, the blank of the foaming mold is processed by using the electric spark and assembled to obtain the foaming mold. The invention is suitable for manufacturing the foaming mold with a complex-shaped inner cavity, can rapidly obtain the blank and the electrode of the foaming mold, enables the chrematistics of the arbitrary prototype with a complex shape through the rapid molding technology to be displayed more obvious as for the more complex shape and realizes the rapid manufacture of the lost-foam casting foaming mold.

The invention relates to the technical field of processing of an axle-hung box of a locomotive, in particular to a process for controlling the deformation of the axle-hung box of the locomotive. The process comprises the following steps of: (1) performing rough machining on a cast steel blank; (2) performing fine machining on the cast steel blank; and (3) checking and storing into a storehouse: a, removing burrs and detecting flaws, b, measuring by using a three-dimensional coordinate, c, manually checking, and d, coating the surface and storing into the storehouse. By the process, burrs, a welding stress and a rough machining stress on thin-wall parts of the cast steel which are easy to deform are eliminated as much as possible; meanwhile, the machining sequence is arranged rationally; afixture is designed and used and a positioning and clamping point is set rationally, so the deformation of the fixture is reduced; and interference and influence of various factors on key elements can be eliminated by the final fine machining. The process guarantees the machining precision and the quality of a product.

A base-adjustable fixture for an elongated workpiece with the outer contour needing to be milled comprises a base, movable portal devices, a positioning device and a control system. A transverse guide rail is mounted at each of the upper and lower edges of the base, and limiting devices for limiting a workblank are arranged on the upper surface of the base at intervals according to the shape of the outer contour of the workblank needing to be machined. Movement of a portal frame structure of each movable portal device along the transverse guide rails is controlled by a portal frame cylinder. The positioning device comprises a press-down positioning device and a plurality of rotatable angle positioning devices, wherein the press-down positioning device is used for pressing down the middle of the workblank, and the rotatable angle positioning devices are used for pressing down the outer contour of the workblank. The control system controls the movable portal devices to move according to machining movement trails of a cutter and controls single or multiple positioning device bodies in the positioning device to loosen to make way for a cutter path. The base-adjustable fixture for the elongated workpiece with the outer contour needing to be milled has the advantages that deformation of the elongated workpiece during machining is avoided, machining efficiency is improved, the positioning device can be controlled to make way for the machining path of the cutter, operation safety is improved and machining precision is high.

The invention discloses a coating for sintering a hard alloy product, which comprises 14.7%-15.4% of high wear resistant C (carbon) powder, 8.4%-8.8% of coarse C powder, 6%-7.5% of Tween80, 2%-3% of normal butanol, 2.5%-5% of PEG (polyethylene glycol) 6000, 22%-25% of metal oxide powder and 37.5%-40% of deionized water, wherein the metal oxide powder includes titanium oxide powder, zirconium oxide powder or aluminum oxide powder, and the ratio of the high wear resistant C powder to the coarse C powder ranges from1.6:1 to 1.8:1. The coating is applicable to sintering of all low-weight hard alloy blanks with the weight less than 250g and cobalt content lower than or equal to 25%, the surface of a boat has no gathered particles after the coating is painted, the coating is not adhered to the boat in sintering, and the sintered product is free of carburization and decarburization and has no dent. Besides, the labor intensity of workers spraying the boat is reduced, dependence of final product quality on manual boat spraying quality is technically and greatly reduced, and the coating is economical.

The invention discloses a production process of a cold forging bearing blank, which relates to a production process of a bearing blank. Its process flow is: steel heating→hot blanking→shaping→grinding both ends→inside and outside angle chamfering→pickling→phosphating→saponification→pre-extrusion inspection→cold extrusion molding→turning process→outer end burrs →Inspection→Transfer to quenching→Transfer to grinding process. Its advantages are less steel and energy consumption, small processing allowance, low scrap rate, less conversion of processing sites, low transportation cost, and the cost before turning grinding is 1.46 yuan/piece. Under the condition of 6 million tons of bearing steel consumption, 1.8 million tons of high-quality bearing steel is saved for the country every year, because the number of heaters and heating temperature are reduced, and coal consumption can be reduced by one-third to 50%.

The invention relates to marine type crankshaft bell crank bending swaging dies and preliminary shaping blank design method. It uses computer modeling technique to design preliminary shaping blank, V shape die, bend upper and lower dies, lower cavity die, plug board, and various die matching using methods. The method can save raw materials, shorten production cycle, and reduce admittance. The designed die and preliminary shaping blank can generate total models crankshaft bell crank parts which have good forming quality, symmetrical appearance, uniform flow line and admittance for MANB&, W and WNSD diesel engine patent company.

The invention relates to an isopropanol-based coating for lost foam casting steel and a production method thereof. The coating uses alumina-zirconia powder as a fireproof material, uses PVB (Polyvinyl Butyral) and phenol formaldehyde resin as adhesives, uses organic bentonite as a suspending agent, and takes suitable quantity of isopropanol as a material coating carrier. The production method comprises the following steps of firstly dissolving the PVB and the phenol formaldehyde resin in an alcohol; sufficiently mixing the mixed solution to form a colloida solution; subsequently mixing the organic bentonite and the alumina-zironia powder uniformly; finally conducting sufficient ball-grinding and mixing to the mixed aggregates, adhesive solutions and isopropanol for 45-70 minutes at the speed of 1450r/min, thus preparing the isopropanol-based coating for lost foam casting steel. The coating has low manufacturing cost, simple technological process and high casting quality, and is particularly suitable for roughcast production of complex and large cast steel.

The invention discloses a preparation method of a foamed aluminum and alloy sandwich plate, which is characterized by comprising the following steps: (1) coating: selecting an aluminum and alloy panel, and compressing the aluminum and alloy panel and foaming powder to prepare a foamed aluminum and alloy sandwich plate blank; (2) welding: sanding and cleaning the welding surface of the foamed aluminum and alloy sandwich plate blank, clamping and positioning the foamed aluminum and alloy sandwich plate blank, and welding to obtain the foamed aluminum and alloy sandwich plate blank satisfying the specification and dimension requirements; (3) foaming: heating the welded foamed aluminum and alloy sandwich plate blank in a heating furnace at 300-600 DEG C for 10-40 minutes; and (4) cooling: cooling the heated foamed aluminum and alloy sandwich plate in the heating furnace, thus obtaining the well-welded foamed aluminum and alloy sandwich plate satisfying the specification and dimension requirements. The preparation method has the advantages of convenient preparation process and low processing cost; and the obtained foamed aluminum and alloy sandwich plate has fine performance.

The invention discloses a method for manufacturing bodiless lacquer sculptures, relating to the field of manufacturing sculptures and solving the problem that current bodiless lacquer techniques only result in tedious surface effect of sculptures and cannot meet the demand of multiple effects required by sculpturing. The method according to the invention comprises the steps: coating dusting agent at the inner side of a mould and then coating various corresponding powders according to the desired artistic effects, so as to obtain a substrate; papering fabrics on the substrate and scratching plaster until the substrate is dry; repeatedly performing the previous step several times and demoulding until the whole substrate is dry in order to a certain part of the sculpture which can be divided into a plurality of parts according to shape features; afterwards, sewing a plurality of parts of the sculpture and then plastering to obtain rough sculpture; and implementing different treatments on the rough sculpture according to the desired surface effect to result in the sculpture. The method not only offers new materials for the creation of modern sculptural art, but also brings new uses to the traditional lacquer technique.

The invention relates to a method and a device for spinning and forming a magnesium alloy wheel, adopting a cylinder-shaped prefabricated roughcast. The method is characterized in that the prefabricated roughcast is arranged on a core die, a flat surface pressure device is used for flaring the prefabricated roughcast by axially moving the prefabricated roughcast, then the prefabricated roughcast and the core die rotate together and the prefabricated roughcast is spun through the radical feeding movement of a rotating spinning roller having the same outline shape as the wheel along the prefabricated roughcast, so that the prefabricated roughcast is subjected to continuous partial plastic deformation along the radial direction, and finally a needed outline of the magnesium alloy wheel is formed. Furthermore, the device comprises a stand and a core die, wherein the stand is in a box shape and is a consistent temperature oil tank, and the box-shaped stand is internally provided with a spinning roller device, a core die rotating device, the flat surface pressure device and a tank cover. In addition, the invention solves the problems of the forming and the demoulding of a similar part of a wheel which is small at both ends and big in the middle, and has the advantages of consistent temperature extrusion, higher dimension precision of products, enhanced production efficiency, and the like.

The present invention relates to a continuous rotary extrusion forming method for a waney metal-plate rotary extrusion belt pulley with the outer wheel circle being provided with a V-shaped groove, and comprises the procedures of feeding, extension, shape correction, perforation, edge cutting, distribution and rotary extrusion forming; at the rotary extrusion forming procedure, a pre-forming wheel with a small-diameter U-shaped groove and a large-diameter U-shaped groove is used to perform the rotary extrusion on the Y-shaped cup-shaped belt pulley roughcast of an edge belt after the distribution procedure, and then a forming wheel with a small-diameter V-shaped groove and a large-diameter V-shaped groove is used to perform the forming rotary extrusion so as to be made into a formed wheel of a waney metal-plate rotary extrusion belt pulley; the value range of M and N is: M is more than or equal to 1 and is less than or equal to 10, and N is more than or equal to 1 and less than or equal to 10. The belt pulley that is produced with the forming method hereinabove has good dynamic and static balancing performance, and guarantees the size requirements when simultaneously driving two elements; the jumping consistence of the circle of the V-shaped groove surface is good; at the same time, the processing method also has the advantages of long service life of the distributing wheel and the forming wheel, simple processing procedures and short processing period.

A die and method of gang punching selective holes in thin sheet materials such as greensheets are provided in which slugs of greensheet material formed during the punching operation easily fall through the die and are removed. The die uses a number of plates one of which is a window plate having openings correspond to openings in a die plate disposed thereon. The window plate openings have a larger diameter than the die plate openings and also a plurality have an oval shape which oval shape openings provide less resistance to the falling slugs and facilitate removal of the slugs from the die. The window plate also preferably has a central grid open area with the remainder of the plate having vertical through-holes corresponding to the through-holes of the die plate. The die also preferably employs a die plate made from at least two sheets of material, i.e., an upper disposable sheet (die plate) and a lower sheet (sub-die plate) wherein the upper die plate is made from a wear-resistant material such as molybdenum. The upper die plate is preferably made by photolithography techniques.

The invention discloses a method for machining a cylindrical mirror. The method for machining the cylindrical mirror comprise the steps that a blank is obtained, and the reference surface of the blank is milled; the blank adheres to a tool with wax; the tool with the blank is arranged on a workpiece shaft of a milling device, and the reference surface of the blank is measured with a dial indicator and is clamped; programmed milling is conducted on the cylindrical surface to be machined; the surface type data of the machined cylindrical surface are measured; the surface type data are compared, if the Rt value is larger than 1 micron, correction milling is conducted, and if the Rt value is smaller than 1 micron, polishing is conducted; if the Rt value and the Ra value of the machined cylindrical surface of the polished workpiece meet expected requirements, the workpiece is detached from the tool, cleaning is conducted, and then the cylindrical mirror is obtained. By the adoption of the method for machining the cylindrical mirror, the machining efficiency and the machining precision of the cylindrical mirror are improved, the high-precision cylindrical mirror can be machined, the machining difficulty and the detection difficulty are effectively lowered, generation of waste is avoided, the machining rejection rate is reduced, the technologies are simple, operation is convenient, and good application prospect is achieved.

The invention discloses a process for precisely forming an inner ferrule blank and an outer ferrule blank of a bearing. The process comprises the following steps of: obtaining a cylindrical blank by adopting a precise blanking mode; heating the cylindrical blank to the temperature of 900 DEG C austenite, and performing temperature upsetting to obtain an upset piece; performing composite temperature squeezing on the upset piece by using a composite temperature squeezing die, and squeezing by one step to obtain a middle squeezed piece with the inner ferrule blank and the outer ferrule blank; performing primary separation on the middle squeezed piece by using a primary stamping die to obtain the outer bearing ferrule blank, a middle technical waste material and a middle stamped piece with the inner ferrule blank; and performing secondary separation on the middle stamped piece with the inner ferrule blank by using a secondary stamping die to obtain an annular waste material and the inner ferrule blank. According to the method, the process flow is simple and reliable, and is easy to implement; and the process has the advantages of high material utilization rate and high production efficiency.