379results about How to "High surface finish" patented technology

The invention relates to a curved surface processing path generation method and system for an ultra-precise diamond lathe, and the method mainly comprises the steps: obtaining the three-dimensional point cloud data of a to-be-processed curved surface through a three-dimensional scanning device, carrying out the global curvature calculation, and dividing the curved surface into a plurality of sub-regions to generate an initial processing path; and then, the initial path is optimized, interference and errors are reduced, and finally a target machining path subjected to comprehensive verification is obtained. The path is guided into a lathe to execute machining, and high-precision curved surface machining is achieved. By means of the method, the machining precision and the surface quality are improved, and it is ensured that higher smoothness and shape precision are achieved in ultra-precision machining.

The invention discloses a high-flexibility winding-resistant robot cable, and relates to the technical field of robot cables, the robot cable comprises a plurality of cable cores, the cable cores are wrapped by a belting layer, a twisting gap of the cable cores is filled with a filler, the belting layer is wrapped by a shielding layer, and the shielding layer is wrapped by an outer sheath layer; the outer sheath layer is prepared from the following components: 80-100 parts of PVC resin, 30-60 parts of nitrile rubber powder, 20-30 parts of a polyolefin thermoplastic elastomer, 10-30 parts of trioctyl trimellitate, 5-15 parts of dioctyl sebacate, 5-25 parts of aluminum hydroxide, 8-15 parts of carbon black, 10-20 parts of modified carbon fiber, 3-6 parts of a heat stabilizer, 1-3 parts of an antioxidant and 1-3 parts of a lubricant; optimized balance of flexibility, bending resistance, mechanical strength and environmental adaptability is achieved, and a high-performance and long-service-life key component is provided for modern industrial automation and robot application.

The invention discloses a stainless steel laser welding parameter optimization method based on a dynamic annular scanning path. The stainless steel laser welding parameter optimization method comprises the steps that S1, welding parameter setting is initialized to be suitable for controlling welding heat distribution; s2, measuring the material thickness of the welding area of the stainless steel workpiece before welding; s3, the scanning path layer number and the progressive speed are determined according to the welding parameters; s4, the welding control system adjusts welding parameters according to the temperature monitoring data; s5, the laser welding control system adjusts the layer number, the progressive speed and the scanning path radius of the dynamic annular scanning path in real time; s6, the scanning amplitude, the scanning frequency and the welding speed are optimized in real time; and S7, after welding is completed, quality detection is conducted on a welding seam, and detection data are compared with a preset welding quality standard. According to the method, accurate control over welding heat input, remarkable improvement of the welding seam quality and comprehensive optimization of the welding efficiency are achieved.

The invention belongs to the technical field of polymer composite materials, and particularly relates to a composite material for a high-strength pipeline and a preparation method of the composite material. The composite material comprises the following components in parts by weight: 70-80 parts of long-carbon-chain semi-aromatic nylon, 15-20 parts of glass fibers, 3-10 parts of carboxylated carbon nanotubes, 1-6 parts of nano silicon dioxide particles, 2-4 parts of an amino silane coupling agent, 0-3 parts of a lubricant and 0-3 parts of an antioxidant. And the long-carbon-chain semi-aromatic nylon is adopted as matrix resin, so that the dual requirements on strength and toughness of the composite material are met. The mechanical property of the material is improved through the glass fiber, the carboxylated carbon nano tube and the nano silicon dioxide particle composite reinforcing filler, and the compatibility of the composite reinforcing filler and the resin and the interaction between molecular chains can be improved by combining a proper amount of the amino silane coupling agent, so that the reinforcing and toughening effects of the filler are fully exerted; the rigidity and toughness of the final product are integrally improved, and the problem of floating fibers on the surface of the glass fibers is solved.

The invention provides a sleeve material for molding an aspheric glass lens and a preparation method of the sleeve material. The method comprises the steps that 1, raw material powder is mixed and dried, tungsten carbide powder and Si3N4 powder are mixed in a ball milling tank in an inert atmosphere to obtain composite powder, and the adding amount of the Si3N4 powder is 1 wt%-15 wt%; (2) die filling; putting the composite powder into a graphite female die, and pre-pressing under the pressure of 5-20 MPa; (3) sintering is conducted, specifically, the mold is placed in an SPS system, the initial axial pressure ranges from 5 MPa to 10 MPa, vacuumizing is conducted till the pressure is 10 Pa or below, gradient heating sintering is conducted, the highest sintering temperature ranges from 1500 DEG C to 1900 DEG C, the highest sintering pressure ranges from 40 MPa to 60 MPa, and after heat preservation is finished, the mold is taken out after cooling; and (4) sampling: carrying out sand blasting treatment on the graphite on the surface of the sample to obtain the sleeve material for molding the aspheric glass lens. The material has a lower thermal expansion coefficient.

The invention discloses a solid-liquid two-phase flow magnetic shear thickening polishing device and method based on controllable multi-physical field coupling, and belongs to the field of magnetic field auxiliary polishing. In order to solve the problems of low polishing efficiency and poor polishing quality uniformity caused by single physical field and poor controllability in the traditional magnetic field assisted polishing technology, the invention provides a coupling effect of a controllable magnetic field and a flow field to realize high-efficiency and high-quality precise polishing. The polishing device is composed of a screw pump, a permanent magnet, a magnetic pole support, a circulating pipeline, an inlet flange, a baffle, a clamp, a workpiece, a positioning block, a positioning plate, an outlet flange and a circulating pipe flange. Permanent magnets with different distributions and polarities are arranged in the magnetic pole support, the magnetic field intensity and the targeting degree of a polishing area are accurately controlled, and the screw pump conveys a polishing medium to the polishing area at a specific flow speed through rotating extrusion of a screw. The curing degree of the polishing medium and the control force of the grinding material are controlled by precisely regulating and controlling the coupling effect of the magnetic field and the flow field, and efficient and high-quality precise polishing of the workpiece is achieved.

The invention relates to the technical field of mold machining, in particular to a numerical control machining center for machining an injection mold and a using method.The numerical control machining center comprises a base, the front end of the base is slidably connected with a mold body, an injection molding groove is formed in the upper end of the mold body, and the front end of the base is rotationally connected with two sets of symmetrical clamping blocks; the rear ends of the two sets of clamping blocks are attached to the mold body, a coating mechanism is installed at the upper end of the base and comprises a mounting plate, a grooving mechanism is installed at the front end of the mounting plate, and a second gear and a first conveying pipe are matched with each other, so that a polishing drill bit machines an injection molding groove in the mold body; and through mutual cooperation of a second fixing rod and a first sliding rod, a grinding drill bit can gradually extend downwards according to the depth of an injection molding groove, through mutual cooperation of a first gear and an inner gear ring, part of assemblies of the coating mechanism and the grooving mechanism conduct circular motion, and therefore a mold body is machined.

The invention relates to the technical field of leather processing, in particular to a leather forming processing device for automotive trim. The device comprises a pretreatment device and a mold device, the rear side of the mold device is connected and provided with a trimming device, the front side of the mold device is connected and provided with a heating device, and the mold device is internally provided and connected with a cooling device. The pretreatment device is used for improving the quality and the processing efficiency of leather, improving the consistency of products and effectively shortening the production cycle, the mold device is used for forming the leather, ensuring the size accuracy and effectively improving the consistency of the products, and the heating device is used for softening the leather, facilitating subsequent processing, improving the process effect and effectively improving the quality of the products. The cooling device is used for rapidly cooling leather, stabilizing the size and effectively improving the product precision, the trimming device is used for finely adjusting the leather and improving the finished product quality, and the safety monitoring device is used for guaranteeing the safety of the machining process and effectively improving the operation safety.

The invention discloses a method for reducing surface mucosa of a tooth-shaped powder metallurgy die, and belongs to the field of parts for transmitting torque in electric tools and engines. In the jet polishing process of the surface of the middle die step of the tooth-shaped powder metallurgy die, a rubber-diamond mixed material is adopted as a jet abrasive material, the rubber-diamond mixed abrasive material is conveyed into a throwing wheel system in a belt conveying mode, the initial speed of jet fluid is controlled to be 28.3 m / s by adjusting the centrifugal force of an impeller, and the jet polishing process is completed. Million of grinding materials make contact with the surface of the tooth-shaped powder metallurgy die in a sliding mode, the grinding effect is achieved under efficient impact, and finally the polishing effect is achieved. According to the invention, the discharge stress can be obviously eliminated, the surface smoothness is improved, the smoothness is increased, the purpose of preventing powder from sticking films is achieved, and meanwhile, the yield can be greatly increased.

The invention relates to the technical field of titanium strips, in particular to a preparation method of a titanium strip for a composite titanium pot, which comprises the following steps: S1, plate blank hot rolling: obtaining a hot-rolled titanium strip coil with the thickness of 3.0 mm; s2, primary cold rolling is conducted, specifically, a primary cold-rolled titanium coil with the thickness being 1 mm is obtained; s3, stress relief annealing is carried out; s4, secondary cold rolling is conducted, specifically, a titanium coil which is subjected to secondary cold rolling and is 0.35 mm in thickness is obtained; s5, annealing a finished product; in the production process, the strip is not prone to breakage, the titanium strip for the composite titanium pot with the excellent model can be obtained, the surface consistency of the coiled material is high, the unevenness of the obtained titanium strip is smaller than or equal to 3 mm / m, the grain size reaches the 8-10 level, and the mechanical property meets the GB / T3621-2007 standard.

The invention provides a PEF composite board and a preparation method, and relates to the technical field of insulation boards, the composite PEF board is formed by bonding a plurality of layers of board bodies, and comprises a base layer, the base layer is prepared from the following components in parts by weight: 58 to 60 parts of HDPE (High-Density Polyethylene), 4 to 6 parts of nano montmorillonite, 1 to 2 parts of benzoyl peroxide, 2 to 5 parts of BHT (Butylated Hydroxytoluene) heat stabilizer and antioxidant, 2 to 5 parts of maleic anhydride grafted polyethylene, 0.2 to 1 part of magnesium stearate and 0.3 to 0.8 part of epoxidized soybean oil; comprising a fireproof layer which is composed of the following components in parts by weight: 45-55 parts of HDPE and 5-15 parts of a phosphate ester environment-friendly flame retardant; comprising a thermal insulation layer and is prepared from the following components in parts by weight: 45-55 parts of HDPE, 5-10 parts of lignin fibers and 5-10 parts of a bio-based foaming agent formed by mixing sodium bicarbonate and citric acid. The invention has the beneficial effects that the mechanical strength, flame retardant property and thermal insulation effect of the PEF plate are obviously improved, the weather resistance and environmental protection property are enhanced, the optimal balance of high performance and cost effectiveness is realized, and the PEF plate is suitable for various building and industrial application environments.

The invention discloses a petroleum self-cleaning filtering device and a combined type oil pumping connector, and relates to the field of petroleum filtration, the petroleum self-cleaning filtering device comprises a shell, one end of the shell is provided with a crude oil inlet, the other end of the shell is provided with a petroleum outlet, the crude oil inlet is communicated with an oil outlet of an oil well pump through a pipeline, and a beam type oil pumping unit drives the oil well pump through the combined type oil pumping connector. The petroleum outlet is communicated with the storage tank; the oil filtering mechanism is mounted in the shell and is used for filtering crude oil; a residue discharging opening is formed in the position, corresponding to the oil filtering mechanism, of the shell in a penetrating mode, and a filter residue collecting bin is arranged on the residue discharging opening in a clamped and sealed mode; and a scraping plate is also arranged in the slag discharging opening. When a cleaning condition is met through the filtering device, the oil filtering mechanism can automatically clean the oil filtering mechanism, so that the overall filtering efficiency is improved; meanwhile, the combined type oil pumping connector can effectively prevent the combined type oil pumping connector from falling off and being twisted off, and meanwhile the corrosion resistance of the combined type oil pumping connector is improved.

The invention relates to the technical field of nonferrous metal material manufacturing, in particular to an efficient cost-reducing preparation method of a high-heat-resistance, high-conductivity and high-strength copper-chromium-niobium material, which comprises the following steps: S1, powder screening; s2, electron beam printing, including entity printing, outer contour printing, thermal compensation scanning and heat preservation; the preparation method of the copper-chromium-niobium material is developed on the basis of reducing the cost; the powder with the larger particle size range is used for reducing the raw material cost, the higher layer thickness is used for reducing the printing time cost, thermal compensation scanning of the outer contour is used for optimizing the surface of a part to reduce the subsequent machining cost, thermal compensation heat preservation after printing is completed is used for reducing the cost of subsequent recharging heat treatment, and the heat preservation efficiency is improved. The tensile strength of the prepared blank is larger than 380 Mpa, the hardness is larger than 110 HB, the conductivity is larger than 47 Ms / m, the process is simple and stable, and batch production is easy.

The invention discloses a rapid cooling post-welding reinforcing device for V-method casting, which comprises a base, a support plate, a sand mold bearing assembly, a forming assembly and a vibrator, the support plate is mounted at the top end of the base, the vibrator is mounted on the outer surface of the sand mold bearing assembly, the sand mold bearing assembly comprises a sand box mounted at the top end of the support plate, and the sand box is filled with fine sand; the device comprises a sand box, fine sand is arranged in the sand box, a plurality of reinforcing plates are uniformly placed in the fine sand in the sand box, a plurality of blanking holes are formed in the outer surfaces of the reinforcing plates, the reinforcing plates are laminated, and a connecting rope is mounted between every two reinforcing plates. The reinforcing plates are arranged in the sand box, so that the reinforcing plates can fill the sand layer in a layered manner, the sand layer can be effectively supported and fixed, and the sand layer is prevented from being deformed or collapsed due to impact and pressure of molten metal in the pouring process.

The invention belongs to the technical field of additive manufacturing, and relates to a laser additive manufacturing method for a low-stress, low-defect and low-deformation titanium alloy thin-wall part. According to the method, key process parameters such as the laser power, the scanning speed, the interlayer deflection angle and the island size are optimized, post-heat treatment is conducted, the residual stress in the titanium alloy manufacturing process is remarkably reduced, the defects such as pores and cracks are reduced, deformation of formed parts is effectively controlled, and therefore the forming quality of TA15 and other titanium alloy parts is improved. The method has the advantages of being high in forming efficiency, wide in application range and the like, and can be widely applied to high-end equipment manufacturing in the fields of aerospace, energy and the like.

The invention discloses an intermediate-annealing-free magnesium foil preparation method capable of being cold-rolled under high pressure, which comprises the following steps: preparing a magnesium alloy cast ingot, and pretreating the magnesium alloy cast ingot to obtain an initial rolled blank plate; at the room temperature, multi-pass rolling with the rolling reduction being 1-30% is conducted on the initially-rolled blank plate, and the thickness of the plate is reduced to the first preset thickness; the plate with the first preset thickness is subjected to multi-pass rolling with the rolling reduction being 30%-50%, and the thickness of the plate is reduced to be the second preset thickness; the rolling force is increased, and rolling is conducted repeatedly till the plate thickness reaches the designated thickness; the whole machining process is carried out at the room temperature, the annealing procedure or high-temperature rolling in a conventional magnesium alloy cold rolling process is omitted, the material surface oxidation phenomenon and the high energy consumption problem in the machining process are avoided, large rolling reduction deformation is adopted in the preparation process, and the production efficiency is improved; the finish-rolled magnesium alloy foil with good flatness and few burrs can be obtained; and the rolling process is simple, and large-scale batch production is easy to realize.

The invention relates to the field of motors, provides a rotor and a manufacturing method thereof, is applied to an asynchronous induction motor, and comprises a rotor core, guide bars and end rings. A plurality of tooth grooves are formed in the circumferential direction of the rotor iron core, and the two ends of each tooth groove penetrate through the two end faces of the rotor iron core in the axial direction respectively; the conducting bars are independently processed and formed, the conducting bars are inserted into the tooth grooves, and the two ends of each conducting bar protrude out of the two end faces of the rotor iron core in the axial direction respectively; the two end rings are respectively arranged at two ends of the rotor core in the axial direction, and the two end rings are respectively connected with two ends of each conducting bar into a whole. The guide bars forming the mouse cage are manufactured independently and are connected into a whole through the end rings at the two ends to form a complete mouse cage structure. A traditional casting process often causes pores in a casting. The porosity can be effectively controlled by separately casting the conducting bars and the end rings.

According to the high-strength steel wire rope, the ultra-high molecular weight polyethylene fiber is adopted as the center core, the three-time twisting and heat setting technology is combined, and the tension strength, the structural stability and the anti-fatigue capacity are improved. And the composite inner layer strand adopts a spiral wrapping and twisting structure of high-strength aramid fibers and steel wires, so that the tensile strength and the fatigue resistance are enhanced, and the abrasion and fracture risks are reduced. The outer-layer strands are provided with the limiting reinforcing ribs and the filling layers, friction is reduced, loosening is prevented, and durability and safety are improved. The outer protective layer is composed of the steel wire mesh, the corrosion-resistant layer and the wear-resistant layer, corrosion and abrasion are prevented, and the service life is prolonged. The invention further provides a preparation method of the high-strength steel wire rope, the method is simple and clear in operation process and high in applicability, the prepared high-strength steel wire rope is excellent in performance, higher in bearing capacity, higher in fatigue resistance, excellent in corrosion resistance and longer in service life, and the requirements for high strength and high durability are met.

The invention discloses a high-brightness wire rod lubricating and drawing device and method. The device comprises a machine body, and a sliding rail is installed on the inner wall of the machine body; the mounting plate is located at the top of the machine body and is in sliding connection with the sliding rail, a drawing device is further installed at the top of the mounting plate, and in the machining process, a wire rod penetrates through the drawing device to achieve drawing operation; a lubricating assembly is further mounted on the mounting plate and comprises a lubricating sleeve, a support is fixedly arranged at the bottom of the lubricating sleeve, and the support is mounted on the top end face of the mounting plate; through the design, in the lubricating process, the lubricating assembly can ensure that lubricating oil is uniformly and stably wrapped on the surface of the wire rod, so that the requirements of low friction and low energy consumption in the drawing process are met, the high surface smoothness of a finished wire rod product is ensured, the use amount of the lubricating oil is greatly reduced, the production cost is effectively reduced, and the production efficiency is improved. And meanwhile, after drawing is finished, residual lubricating oil can be simply filtered and recycled, and impurities and particles in the lubricating oil are removed.

The invention relates to the technical field of motor shell casting, and discloses a casting device for motor shell production, which comprises a processing table, a bottom die mounted at the top of the processing table, and a top die movably covering the top of the bottom die, and two groups of lifting transmission assemblies which are oppositely arranged are mounted at the tops of the left and right ends of the bottom die; the two lifting transmission assemblies are in transmission connection through the forward and reverse driving assembly, the lifting transmission directions of the left lifting transmission assembly and the right lifting transmission assembly are opposite, the left lifting transmission assembly carries the top mold to vertically move during lifting transmission so as to complete the mold opening and closing process, and the right lifting transmission assembly acts on the powdering assembly and the ventilation assembly during lifting transmission so as to complete the mold opening and closing process. The powder feeding assembly completes automatic feeding or material spraying, exhaust of the air exchange assembly and switching of a material conveying path are completed, cooling and heat exchange are alternately conducted on a mold cavity of the bottom mold or film coating operation is alternately conducted on the mold cavity, an integrated automatic machining mode is adopted, the surface smoothness of a casting is remarkably improved, and the demolding efficiency and the product quality are improved.

The invention provides a cold header for fastener production, and belongs to the technical field of cold headers. Comprising a cold heading head, a cold heading base and a conveying unit, and the conveying unit is used for conveying cold heading workpieces and connected with the cold heading head and the cold heading base. By arranging the conveying unit, the cold heading workpiece can be automatically conveyed to the position of the next cold heading hole, and the conveying unit runs without an additional driving source, so that the cost of the cold heading machine is reduced, the processing efficiency of the cold heading machine on the cold heading workpiece is ensured, the yield is increased, and the production cost is reduced. The conveying unit can automatically lubricate the cold heading workpiece, the first cold heading die and the second cold heading die, the problems of galling, scratching and the like of the cold heading workpiece in the cold heading process are effectively prevented, the surface smoothness and the size precision of the workpiece are improved, and after the first cold heading die and the second cold heading die are lubricated, the dies can be protected, and the production efficiency is improved. The metal surface of the die can be prevented from being oxidized or corroded, and the service life of the die is prolonged.

The present invention discloses a machine tool grinding device for machining mechanical spare parts, and relates to the technical field of machine tools for machining mechanical spare parts. The present invention comprises a fuselage, wherein the fuselage is provided with a cavity, wherein the fuselage comprises a cross, wherein the cross is fixedly mounted on the top inner wall and the left and right side walls of the cavity of the fuselage, wherein a drilling device is arranged on the top of the fuselage, wherein a grinding device is arranged on the right side of the fuselage, wherein a debris removal mechanism is arranged on the bottom of the cavity of the fuselage, and wherein a material discharge and ejection device is arranged on the bottom of the fuselage. The present invention arranges the grinding device so that the telescopic push rod, the water storage column, the squeezing water bag, the grinding strip, the water outlet disc and the scraping plate cooperate with the frame plate, and the telescopic push rod pushes the squeezing water bag to drive the grinding strip to grind the borehole, thereby removing the rough and uneven parts inside and outside the borehole, making it smoother and more precise, thereby improving the dimensional accuracy and surface finish of the borehole.

The invention discloses an automatic casting surface treatment system, and relates to the technical field of casting surface treatment. According to the casting part polishing device, polishing sand is driven to form ordered circulating flow in the sand pool through rotation of the rotary shifting plate, the polishing sand is evenly distributed on the surface of a casting part in combination with the design of the partition plate, and the polishing uniformity and consistency of the surface of the casting part are ensured. Due to the fact that the casting part can be stably clamped between the first clamping plate and the second clamping plate, polishing of different positions is achieved through swinging of the swinging fluted disc, the equipment can efficiently conduct all-directional treatment on the surface of the casting part, and therefore the surface smoothness and quality of the casting part are improved; casting parts in the sand pool are polished at the same time in the mode that polishing sand flows in the sand pool in the radial direction, a plurality of spline sleeve shafts are designed, each spline sleeve shaft is provided with a first clamping plate and a second clamping plate, and the multiple casting parts can be clamped at the same time for polishing treatment.

The invention relates to the technical field of mirror rollers, in particular to a mirror roller and a preparation process thereof.An alloy steel seamless steel pipe is selected as a base material, choline chloride-ethylene glycol ionic liquid serves as an electroplating solvent, the surface of a base part is pre-plated with a nickel-chromium-cobalt plating layer to serve as a transition layer, and then electroplating continues to be conducted on the transition layer; a nickel-chromium-cobalt surface doped with the modified nano titanium carbide is generated; carrying out low-temperature ion nitriding treatment on the electroplated substrate; the surface of the mirror roller is refined and modified through plasma electrolytic polishing, and the surface smoothness of the mirror roller is remarkably improved by controlling technological parameters of the mirror roller.

The invention relates to the technical field of wire and cable processing equipment, in particular to a wire and cable copper wire drawing machine which comprises a machine table and the like, a pay-off device, a fixing plate and a pull rod are sequentially and fixedly mounted on the machine table from left to right, a wire drawing box is slidably connected to the position, close to the pull rod, of the machine table, and a fixed wire drawing module is fixedly connected to a side plate of the wire drawing box; the top end of the wire drawing box is fixedly connected with a lubricating liquid box, a hand pressure valve is installed between the wire drawing box and the lubricating liquid box, the hand pressure valve is connected with the fixed wire drawing module through a liquid pipe, and the hand pressure valve makes contact with the pull rod. Through the cooperative design of the hand pressure valve and the pull rod, automatic conveying control over lubricating liquid is achieved, in the wire drawing process, along with movement of the wire drawing box, the hand pressure valve is automatically opened, the lubricating liquid is accurately conveyed to the position where the wire drawing module is fixed, timely and effective lubrication is provided for a copper wire, and friction and abrasion between the copper wire and the wire drawing module are reduced.

The invention relates to a powder processing device and method for improving sphericity and surface smoothness of powder, the powder processing device comprises a processing cylinder and a plurality of rotating mechanisms, the lower rotating mechanism comprises stirring blades and can rotate in the forward direction, and the upper rotating mechanism comprises shaping blades and can rotate in the forward direction or in the reverse direction. A certain obtuse angle is formed between a stirring blade of the lower rotating mechanism and the rotating direction, powder can be raised better, and a shaping blade of the upper rotating mechanism comprises a positive inclined plane and a negative inclined plane. Firstly, the rotating directions of the upper rotating mechanism and the lower rotating mechanism are opposite, the inclined faces, facing the rotating direction, of the shaping blades are opposite to the moving direction of raised powder, the angles of the inclined faces are approximately perpendicular to the moving direction of the raised powder, and agglomerated powder and satellite balls are impacted and crushed; the rotating directions of the upper rotating mechanism and the lower rotating mechanism are identical, and the inclined faces, facing the rotating direction, of the shaping blades are close to the moving direction of the raised powder; and the surface smoothness of the powder is improved mainly by friction action. The stirring blades of the lower rotating mechanism enable the powder particles in the barrel to generate a friction effect, and the surface smoothness of the powder can also be rapidly improved.

The application discloses a die-casting device for window sliding wheel machining, which comprises an operating machine table arranged on the ground, a die-casting base fixedly arranged at the middle of the bottom of the inner cavity of the operating machine table, and a limiting guide rod fixedly arranged at the top of each corner of the die-casting base, and belongs to the technical field of die-casting. The die-casting device for window sliding wheel machining is characterized in that the upper die, the hydraulic rod, the lower die mechanism and the electric telescopic rod are matched to realize efficient and stable die-casting. During die-casting, the structures are cooperatively driven to automatically circulate and flow the cooling liquid, the cooling and shaping are rapidly completed, the processing efficiency is effectively improved, the circulating cooling liquid can drive the inside of the lower die mechanism to generate high-frequency oscillation, the internal bubble defects of the casting are eliminated, the product structural strength and surface quality are improved, meanwhile, the cooling liquid is uniformly disturbed in the die to improve the heat exchange efficiency, the temperature of the cavity is rapidly and evenly balanced, the deformation and cracking of the casting are prevented, the forming precision and product qualification rate are ensured, and the overall structure is simple, stable and reliable in operation.

The present invention provides a salt core pressing mold with notches inclined in the same direction and a manufacturing process, comprising an upper mold and a lower mold, wherein a matching lower mold upper part is mounted on the lower mold, a salt core feeding area is reserved between the lower mold and the upper part of the lower mold, a spring connecting sleeve is arranged on the upper part of the lower mold, and a spring mold is arranged inside the spring connecting sleeve; a through hole for the spring connecting sleeve to be placed is arranged in the upper mold, and the process comprises mold assembly, salt material addition, salt material pressing and salt material drying. The salt core pressing mold with notches inclined in the same direction and the manufacturing process of the present invention can form the salt core with notches inclined in the same direction at one time, without the need for subsequent grinding process, thus saving time and ensuring the quality of the finished product; and due to the one-time integrated molding, the salt core has higher design strength and surface finish, and the finished salt core can better meet the quality requirements of the piston for internal cooling.

The invention discloses a rapid self-reaction type water-soluble core material and a preparation method thereof, and the core material comprises the following raw materials by weight: 0-10 parts of first polyethylene glycol with a weight-average molecular weight of 8000-20000; the weight-average molecular weight of the second polyethylene glycol is (1000-12000): 20-40 parts; 5 to 20 parts of inert filler; 5 to 25 parts of an acid source; 5 to 30 parts of an alkali source; 0 to 5 parts of an anti-settling agent; and 0-1 part of a drying agent. According to the scheme, the rapid self-reaction type water-soluble mold core material is realized, the rapid dissolution speed can be kept in water, and the production efficiency of manufacturing a wax mold cavity is improved.

This invention discloses a free-machining high-strength aluminum-lithium alloy, its preparation method, and its applications, belonging to the field of alloy materials technology. The free-machining high-strength aluminum-lithium alloy has the following weight percentages of elements: Li: 3.5–5.5%, Cu: 2.6–3.1%, Zn: 6.8–7.1%, Mg: 2.1–3.0%, Y: 1.5–4.0%, Bi: 0.85–1.05%, In: 0.05–0.08%, Cr: 0.05–0.45%, Ti: 0.02–0.04%, with the balance being Al. This invention involves batching, smelting, refining, online refining, online degassing and filtration, casting, homogenization, extrusion, and two-stage aging treatment to finally obtain a free-machining high-strength aluminum-lithium alloy with a uniform microstructure. This invention has a reasonable component ratio, low manufacturing cost, and the resulting product has excellent strength and hardness, and exhibits excellent surface finish after dry machining.