30results about How to "Dense grain structure" patented technology

The invention relates to a Ni-based alloy oil sleeve for a high-acidity deep well, which comprises the following components in percentage by mass: less than or equal to 0.02 percent of C, less than or equal to 0.03 percent of P, less than or equal to 0.03 percent of S, less than or equal to 0.5 percent of Si, less than or equal to 1.0 percent of Mn, 40 to 60 percent of Ni, 20 to 30 percent of Cr, 1 to 10 percent of Mo, 1 to 5 percent of W, 0 to 5 percent of Co, 0.1 to 3.0 percent of Cu, 0.01 to 0.5 percent of Al, less than or equal to 0.01 percent of O, less than or equal to 1.5 percent of Ti, and the balance of Fe and inevitable impurities. In the invention, the thermal extrusion processing performance and corrosion resisting performance of the alloy are effectively ensured by controlling the contents of the Al and O. The 90 to 140 ksi steel-grade Ni-based alloy oil sleeve meeting different well depth requirements of high-acidity oil fields and gas fields is manufactured by thermal extrusion, 1,050-1,150 DEG C of solution treatment and cold rolling of the smelted and forged blanks.

The invention relates to a Fe-based austenite alloy oil sleeve, which comprises the following components in percentage by mass: less than or equal to 0.03 percent of C, less than or equal to 0.03 percent of P, less than or equal to 0.03 percent of S, 0.01 to 1.0 percent of Si, 0.01 to 3.0 percent of Mn, 25 to 40 percent of Ni, 20 to 35 percent of Cr, 1 to 5 percent of Mo, 0.1 to 1.5 percent of Cu, 0.01 to 0.5 percent of Al, less than or equal to 0.01 percent of O, and the balance of Fe and inevitable impurities. The 90 to 140 ksi steel-grade Fe-based alloy oil sleeve meeting different well depth requirements of high-acidity oil fields and gas fields is manufactured by thermal extrusion, 1,050-1,180 DEG C of solution treatment and cold rolling of the smelted and forged blanks.

The invention discloses a high-strength and high-toughness heat-treatment-free aluminum alloy material and a preparation method, and belongs to the technical field of aluminum alloy casting. The high-strength and high-toughness heat-treatment-free aluminum alloy material comprises the following components in percentage by mass: 8.0-10.5% of Si, less than or equal to 0.15% of Fe, 0.05-0.3% of Mg, 0.05-0.3% of Zn, 0.3-0.6% of Mn, less than or equal to 0.1% of Cu, 0.05-0.15% of Ti, less than or equal to 0.005% of Ca, 0.005-0.030% of Sr, 0.1-0.3% of Zr, 0.01-0.1% of Mo, 0.01-0.3% of V, less than or equal to 0.02% of Cr, less than or equal to 0.002% of Na, less than or equal to 0.002% of P, less than or equal to 0.01% of Cd, less than or equal to 0.001% of Li, less than or equal to 0.0025% of B, less than or equal to 0.05% of Ga, and the balance Al and inevitable impurities. The alloy does not need to be subjected to heat treatment, and has excellent casting performance and mold filling capacity and good tensile strength, yield strength and toughness.

The invention discloses a production process of a high-precision ball bearing ring and belongs to the technical field of machine manufacturing. The process comprises the following steps of: machining a blank into a ring by use of a machine tool; performing cold-rolling expansion treatment to primarily shape the ring; performing heat treatment and cryogenic treatment under such conditions that the quenching hardness of heat treatment reaches the level HRC60-63 and the cryogenic temperatures is controlled within the range of minus 60 DEG C to minus 90 DEG C; after cold-rolling expansion treatment, performing raw grinding treatment and fine grinding treatment on the planes, outer circumference, inner cavity and channels of the ring until the dimensional precision of a component is reached; and finally performing ultra-fine grinding treatment on the channels of the bearing ring so as to reduce the roughness of the channels, improve the roundness of the channels and ensure that the roughness is less than 0.015 Ra. According to the invention, the production process is simple, the production period is shortened, and the production efficiency is increased; and besides, the cold-rolling expansion treatment ensures that the fatigue resistance and precision of the bearing ring are improved, so that the service life of the bearing ring is longer.

The invention belongs to the field of material surface engineering and in particular relates to a method for preparing a high-content WC (Wolfram Carbide) enhanced alloy powder coating by employing a laser cladding technology. The composite powder is clad on the surface of a workpiece by employing laser cladding, wherein the composite powder is prepared from WC powder and bonding-phase alloy powder according to a weight ratio, the content of WC powder in the composite powder is 50-70wt%, and the content of bonding-phase alloy powder is 30-50wt%. The WC enhanced alloy powder composite functional coating is prepared by employing the process method, the wear resistance and high-temperature performance of the workpiece are greatly improved after treatment, the service life is prolonged by over 8 times, and the economic benefits are obvious.

The invention discloses a production process for a high-precision roller bearing ring, which belongs to the technical field of mechanical manufacture. The production process comprises the following steps of: turning a blank into an annular shape by adopting a machine tool; carrying out a cold rolling expansion process and basically processing and forming the ring; carrying out heat treatment and cryogenic treatment; controlling the quenching hardness (Hardness Rockwell) of the heat treatment to be 60-63 and controlling the cryogenic temperature to be -60DEG C to -90DEG C; carrying out preliminary grinding and fine grinding processes on workpieces subjected to cold rolling expansion process; carrying out grinding processing on a plane, the outside diameter, an inner hole and a channel of the ring to reach the size precision of parts; and finally, carrying out an ultra-fine grinding procedure, i.e. carrying out ultra-fine grinding on the channel of the ring, reducing the roughness and improving the roundness of the channel, wherein the roughness of the channel is smaller than 0.015Ra. According to the production process disclosed by the invention, the flow is simple, the production period is shortened and the production efficiency is improved; and after cold rolling and deforming, a grain structure of a metal material is more compact, a metal streamline is unchanged and no cut-off is generated, thus the fatigue resisting strength of the material is improved.

The invention discloses pulse electrochemical deposition and tissue adjustment processes for a nickel plating copper belt. The process comprises the following steps of: performing pulse plating on a nickel coating; performing subsequent cold machining deformation and vacuum heat treatment processes, and the like. By the pulse electrochemical deposition process, the thickness of the nickel coating deposited on the copper belt and the uniformity of a microscopic structure can be effectively ensured; and by the subsequent cold machining deformation and vacuum heat treatment processes, the comprehensive mechanical property, particularly the bending resistance and the physical property of the nickel plating copper belt can be improved, so that high-quality nickel plating copper belts required in industries such as electronics, batteries, electrovacuum, electric light sources and the like can be possibly processed. The pulse nickel plating and tissue adjustment process is low in required equipment investment, has a simple method, is convenient to operate and is suitable for industrial production.

The invention discloses a high-performance aluminum alloy for casting thin-walled structural parts and a preparation method of the high-performance aluminum alloy. The aluminum alloy is prepared fromthe following components in percentage by weight: 9.5-11.0% of Si, less than or equal to 0.15% of Fe, 0.26-0.35% of Mg, less than or equal to 0.05% of Zn, 0.5-0.6% of Mn, less than or equal to 0.03% of Cu, 0.05-0.15% of Ti, less than or equal to 0.002% of Ca, less than or equal to 0.002% of Na, less than or equal to 0.002% of P, less than or equal to 0.005% of Sb, 0.010-0.025% of Sr, less than orequal to 0.01% of Cd, less than or equal to 0.001% of Li and the balance of Al. According to the high-performance aluminum alloy for casting the thin-walled structural parts and the preparation methodof the high-performance aluminum alloy, design and study are carried out in terms of composition design, material selection, purification treatment, casting process and the other aspects, and the aluminum alloy with greater than or equal to 220 MPa of tensile strength, greater than or equal to 130 MPa of yield strength and greater than or equal to 6.0% of elongation is provided, and can meet theproduction demand of automobile shock absorber towers.

The invention discloses an integrated type light-weight gear shaft. The gear shaft includes a central shaft part and a gear disc part, wherein the central shaft part is composed of a first shaft section, a second shaft section, a third shaft section, a fourth shaft section and a fifth shaft section, the first shaft section, the second shaft section, the third shaft section, the fourth shaft section and the fifth shaft section are sequentially connected from the left to the right and are coaxially arranged, the central shaft part is of a hollow structure, the inner and the outer diameters fromthe first shaft section to the fourth shaft section are sequentially increased, the inner and outer diameters of the fifth shaft section are less than the inner and outer diameters of the fourth shaftsection, a spherical shaft end is arranged at the end, away from the fourth shaft section, of the fifth shaft section, and a central through hole is formed in the spherical shaft end. According to the integrated type light-weight gear shaft, light-weight technology is adopted, and the invention provides the integrated light-weight gear shaft and a manufacturing technique thereof, manufacturing and machining are convenient, the use ratio of materials is high, energy consumption is low, the finished product has certain stream lines, metal density is high, and the combination properties of the product are excellent.

The invention discloses a sliding engagement sleeve of a new energy automobile. Engaging teeth are arranged on the inner wall of a sliding engagement sleeve body, and an inner cavity of the sliding engagement sleeve body is of the structure composed of two cylinders with different inner diameters. The engaging teeth arranged on the inner wall of the sliding engagement sleeve of the new energy automobile are formed instantly by conducting cold-forging and reversed-extrusion manufacturing process twice step by step, traditional cutting machining is replaced, the production efficiency is high, raw materials are saved, and the production cost is reduced; and meanwhile, the accuracy of products is high, a extrusion-forming metal flow line is prevented from being cut off, the grain structure is compact, the strength of the toothed surface is improved, and the mechanical property and quality of the products are good.

The invention discloses a cold heading forming process for a seamless chain roller and a punch pin head for cold heading forming bottom punching. The cold heading forming process for the seamless chain roller comprises the steps of feeding, cutting, flat heading, blank heading, inversion, head punching, inversion, secondary punching and bottom punching; the depth of the head punching after the blank heading and the inversion is controlled in a range of 2 to 5 millimeters; and the reserved bottom thickness of the secondary punching after the inversion is controlled in a range of 0.5 to 2 millimeters. The punch pin head for the cold heading forming bottom punching comprises a front head of a cylindrical surface, and the rear part of the front head (10) of the cylindrical surface of the punch pin head is a raised spherical surface (20). By combining the cold heading forming process and the punch pin head, one-time precise cold extrusion forming of workpieces can be finished, staggered metallographic structures in the metal and defective metallic plastic formed metal streamlines are repaired, and the mechanical property of a product is further improved.

The invention belongs to the field of material surface engineering and in particular relates to a method for preparing a high-content WC (Wolfram Carbide) enhanced alloy powder coating by employing a laser cladding technology. The composite powder is clad on the surface of a workpiece by employing laser cladding, wherein the composite powder is prepared from WC powder and bonding-phase alloy powder according to a weight ratio, the content of WC powder in the composite powder is 50-70wt%, and the content of bonding-phase alloy powder is 30-50wt%. The WC enhanced alloy powder composite functional coating is prepared by employing the process method, the wear resistance and high-temperature performance of the workpiece are greatly improved after treatment, the service life is prolonged by over 8 times, and the economic benefits are obvious.

The die comprises a female die, a male die and an ejection material, the female die comprises a female die seat cushion block and a female die seat outside the female die seat cushion block, a clamping block is arranged on the outer side of the female die seat, the female die seat is internally provided with a female die cushion block and a bottom die, the female die cushion block is internally provided with a cushion head, and the ejection material is arranged on the male die seat. A male die structure is arranged in a die cavity of the bottom die on one side of the cushion head, the male die comprises a punching rod and a punching die seat cushion block, a material returning ejector rod is arranged in the cushion head, and a spring is arranged outside the material returning ejector rod. The method comprises the steps of (1) selecting a horizontal multi-connecting-rod toggle-rod type cold extrusion press, (2) manufacturing a female die, a male die and an ejection material, (3) manufacturing an aluminum blank, (4) treating the manufactured aluminum blank, and (5) conducting composite cold extrusion molding.Metal plastic deformation is good, the grain structure is more compact, and the mechanical properties such as tensile strength, compressive strength, bending strength and toughness are enhanced.

The invention relates to an antifreezing hydraulic pump body which comprises a casing and an anti-icing coating arranged on an outer layer of the casing. The casing comprises, by mass percentage, 3.26-3.56% of C, 2.13-2.56% of Si, 0.8-1.5% of Mo, 1.12-1.32% of Cu, 0.56-0.75% of Re, 0.5-1.0% of Ni, 2.15-2.40% of Cr, 0.36-0.45% of Ti, 0.5-0.8% of Mn, 0.5-0.9% of Ni, 0.02-0.05% of Sb, 0.33-0.35% of Sn , 0.43-0.55% of Mg, 0.23-0.26% of V, 0.1-0.3% of rare earth element, less than 0.08% of S, less than 0.04% of P, and the balance Fe. The casing is high in strength, very small expansion and shrinkage can occur under a large temperature difference, the service life of the antifreezing hydraulic pump body is prolonged, and the cost is reduced; titanium element is added, corrosion resistance and strength can be improved, vanadium element is added, crystal grains can be refined during forging, strength, toughness, corrosion resistance, abrasion resistance and impact load resistance of the antifreezing hydraulic pump body can be improved, copper element is added, the crystal grains can be refined, overheating sensitivity and temper brittleness of the antifreezing hydraulic pump body are reduced, and the strength is improved.

The invention discloses a new energy automobile transmission intermediate shaft production technology. The new energy automobile transmission intermediate shaft production technology comprises the following steps of (1), blanking; (2), spheroidizing annealing; (3), blank manufacturing, shot blasting and phosphorus saponification; (4), reducing extruding; (5), upsetting cold extruding, specifically, upsetting cold extruding is conducted on a bar through a mold, and a first cam is formed on the rod portion of the metal bar; (6), annealing treatment; (7), shot blasting and phosphorus saponification treatment; and (8), upsetting forming, specifically, a blank obtained after shot blasting and phosphorus saponification treatment and a split-ring mold are cooperatively put into a forming mold tobe subjected to upsetting cold extruding, a second cam is formed, the inner cavity structure of the split-ring mold is matched with the outer diameter of an intermediate shaft, the outer diameter structure of the split-ring mold is matched with the inner cavity structure of the forming mold, and the split-ring mold is arranged above the first cam. According to the new energy automobile transmission intermediate shaft production technology, a cold forging manufacturing technology is adopted, the production period is short, the material utilization rate is high, the machining cost is low, the grain structure is compact, the mechanical performance is high, and the mating requirements of new energy automobile parts can be met.

The invention discloses a cold forging extrusion concave die. An upper die positioning sleeve is arranged in a fixed guiding ring and moves vertically along the inner wall of the fixed guiding ring under the action of the external force. A nitrogen spring is arranged between the upper die positioning sleeve and a movable upper concave die. The movable upper concave die and a lower concave die aretwo coaxially-engaged axial through hole round sleeves. The movable upper concave die is connected with the fixed guiding ring. The fixed guiding ring is fixed on an upper die frame. The upper die frame is connected with a die frame guiding sleeve. The die frame guiding sleeve is arranged on a guiding column in a sleeving mode and can move vertically along the guiding column under the action of the external force. A bearing block is located at the bottom of the lower concave die. A material ejecting rod perpendicularly penetrates through the bearing block and enters a die cavity of the lower concave die. By means of the cold forging extrusion concave die, a sun wheel is formed, the cutting machining difficulty of a sun wheel of small size is reduced, the production efficiency is high, thematerial utilization rate is high, the processing cost is low, and the tooth surface strength of a first-level transmission gear is improved.

The invention discloses an integrated type light-weight gear shaft. The gear shaft includes a central shaft part and a gear disc part, wherein the central shaft part is composed of a first shaft section, a second shaft section, a third shaft section, a fourth shaft section and a fifth shaft section, the first shaft section, the second shaft section, the third shaft section, the fourth shaft section and the fifth shaft section are sequentially connected from the left to the right and are coaxially arranged, the central shaft part is of a hollow structure, the inner and the outer diameters fromthe first shaft section to the fourth shaft section are sequentially increased, the inner and outer diameters of the fifth shaft section are less than the inner and outer diameters of the fourth shaftsection, a spherical shaft end is arranged at the end, away from the fourth shaft section, of the fifth shaft section, and a central through hole is formed in the spherical shaft end. According to the integrated type light-weight gear shaft, light-weight technology is adopted, and the invention provides the integrated light-weight gear shaft and a manufacturing technique thereof, manufacturing and machining are convenient, the use ratio of materials is high, energy consumption is low, the finished product has certain stream lines, metal density is high, and the combination properties of the product are excellent.

The center shaft for the electric bicycle comprises a center shaft body, the center shaft body is provided with a frame mounting portion, fluted disc fixing portions, prism-shaped structures and frustum structures are arranged on the two sides of the frame mounting portion, each side face of each frustum structure is a slope-shaped face, a slope angle theta is formed between each slope-shaped face and the center axis of the center shaft body, and the fluted disc fixing portions, the prism-shaped structures and the frustum structures are arranged on the center shaft body. The invention further provides a machining process of the center shaft for the electric bicycle, cutting loss is avoided in the machining process, the material utilization rate is increased, light weight of products is achieved, raw materials are saved, the production cost is reduced, the original phosphorus saponification treatment procedure of the surface polluting the environment is omitted, the machining period is shortened, and the machining efficiency is improved. And the production efficiency is improved, and energy conservation and environmental protection are achieved.

The invention relates to a manufacturing method of a Ni-based alloy oil sleeve for a high-acidity deep well, which comprises the following components in percentage by mass: less than or equal to 0.02 percent of C, less than or equal to 0.03 percent of P, less than or equal to 0.03 percent of S, less than or equal to 0.5 percent of Si, less than or equal to 1.0 percent of Mn, 40 to 60 percent of Ni, 20 to 30 percent of Cr,1 to 10 percent of Mo, 1 to 5 percent of W, 0 to 5 percent of Co, 0.1 to 3.0 percent of Cu, 0.01 to 0.5 percent of Al, less than or equal to 0.01 percent of O, less than or equal to 1.5 percent of Ti, and the balance of Fe and inevitable impurities. In the invention, the thermal extrusion processing performance and corrosion resisting performance of the alloy are effectively ensured by controlling the contents of the Al and O. The 90 to 140 ksi steel-grade Ni-based alloy oil sleeve meeting different well depth requirements of high-acidity oil fields and gas fields is manufactured by thermal extrusion, 1,050-1,150 DEG C of solution treatment and cold rolling of the smelted and forged blanks.

The invention discloses a new energy automobile bearing pedestal which comprises a shell. An inner cavity of the shell is sequentially provided with a first cylindrical cavity, a second cylindrical cavity and an upper sealing cover upwards from the end face of the shell, and the inner diameter of the first cylindrical cavity is larger than the inner diameter of the second cylindrical cavity; the part, between the shell end face and the shell upper sealing cover, of the shell outer wall is sequentially provided with a first outer round wall, a second outer round wall and a connecting block arranged on the second outer round wall, and the outer diameter of the first outer round wall is larger than the outer diameter of the second outer round wall; and the shell is of an overall structure andis formed by forging of an aluminum alloy. Metal streamline of the new energy automobile bearing pedestal cannot be cut off, the grain structure is compact, the mechanical property is high, the turning machining amount is greatly reduced due to forging molding, deformation is avoided in the machining process, the product accuracy is high, the material using rate is high, the production period isshort, efficiency is high, and the automobile part mating requirement can be met.

The invention relates to a method for manufacturing automobile tie-rod joints, which adopts three extrusion processes to complete the forming process of the automobile tie-rod joints, comprising the following steps: (1) making the blank of the automobile tie-rod joints according to the permissible phenotype requirements of forward extrusion; (2) ) performing forward extrusion processing on the blank of the automobile tie rod joint; (3) performing upsetting treatment on the workpiece after the forward extrusion treatment; (4) performing reverse extrusion treatment on the tail of the upsetting workpiece to obtain the automobile tie rod joint. Compared with the prior art, the invention has the advantages of low raw material consumption, improved mechanical properties, dimensional accuracy and surface finish of the manufactured automobile tie rod joints, and the like.

The present invention provides a composite processing molding method of a metal blank. According to the method, based on characteristics of different regions of the metal blank, numerical control processing and laser cladding are respectively used to complete the composite processing molding of the blank, wherein during the composite processing molding process, the numerical control processing method is mainly based on the place with characteristics of low blank precision requirement, simple structure, easy molding and large thickness, and the laser cladding rapid molding method is mainly based on the place with characteristics of high blank precision requirement, complex structure, difficult molding, small thickness, narrow seam, deep groove and the like, and the corner or projection and other places with large force applying. According to the present invention, the two technologies such as numerical control processing and laser cladding are combined, such that the rapid and precise processing on the blank can be concurrently achieved, the performance of the part is excellent, the production period is short, and the cost is low.

The invention belongs to the technical field of diamond surface treatment and particularly relates to an electrocorrosion-preventing treatment method for the surface of nickel-plated diamond. The electrocorrosion-preventing treatment method includes the following steps that firstly, a treatment solution is prepared, wherein the solution with 10 g / L to 15 g / L of cobaltous sulfate and 5 g / L to 8 g / L of sodium fluosilicate are prepared, and the pH is adjusted to range from 2 to 4; secondly, a nickel-plated diamond particle is added in the treatment solution of the first step, water bath heating is performed till the temperature reach 60 DEG C to 75 DEG C, and the temperature is maintained; thirdly, a strong oxidant is added to the treatment solution and stirred for 8 min to 15 min, and a cobalt-containing electrocorrosion-preventing layer is formed on the surface of the nickel-plated diamond particle; and fourthly, the nickel-plated diamond particle obtained after treatment is obtained through precipitating, filtering and drying. The nickel-plated diamond particle treated through the above method has high electrocorrosion-preventing performance, meanwhile has certain electroplating activity and has good embedding performance and the long service life when applied in the production process of electroplated diamond wires.

The invention discloses a double-cavity automatic cast welding mold and a lead supply system of the mold. The double-cavity automatic cast welding mold comprises two mold cavities, two manifolds, two lead inlets and a plurality of lead flow openings. The corresponding lead flow openings are formed in one side of the positive mold cavity, the positive manifold is arranged on one side of the lead flow openings, and the positive mold cavity, the lead flow openings and the positive manifold are internally communicated. The negative mold cavity, the corresponding lead flow openings and the negative manifold are arranged on one side of the positive mold cavity, the corresponding lead flow openings and the positive manifold in a mirror symmetry mode. Through the manifolds, a lead supply pipeline is divided into the two independent mold cavities, namely the positive mold cavity and the negative mold cavity, and two independent lead supply subsystems are formed. The positive manifold and the negative manifold supply lead separately, and therefore temperatures needed for smelting tabs of different thicknesses are better achieved; the speeds and flowing directions of molten lead entering the manifolds and the mold cavities are controlled, so that the temperatures of the molten lead in all portions of the manifolds and the mold cavities are consistent, and the purpose of improving the welding quality of storage batteries is achieved.

The invention discloses a high-performance aluminum alloy for casting thin-walled structural parts and a preparation method thereof. The aluminum alloy is composed of the following components in weight percent: Si9.5‑11.0%, Fe≤0.15%, Mg0. 26‑0.35%, Zn≤0.05%, Mn0.5‑0.6%, Cu≤0.03%, Ti0.05‑0.15%, Ca≤0.002%, Na≤0.002%, P≤0.002%, Sb≤0.005%, Sr0 .010‑0.025%, Cd≤0.01%, Li≤0.001%, and the balance is Al. The present invention is designed and researched in terms of composition design, material selection, purification treatment, casting process, etc., and provides a tensile strength≥ 220MPa, yield strength ≥ 130MPa, elongation ≥ 6.0%, aluminum alloy that can meet the production needs of automobile shock towers.

The invention discloses a new energy automobile speed reducer driven gear. The new energy automobile speed reducer driven gear is integrally of a hollow cylindrical structure, is formed by forging metal and is provided with a center hole, helical teeth and straight teeth are arranged on the circumferential face of the outer side of the center hole correspondingly, annular grooves are formed in thetwo end faces correspondingly, a first annular groove is formed in the end face adjacent to the helical teeth, and a second annular groove is formed in the end face adjacent to the straight teeth. According to the new energy automobile speed reducer driven gear, a warm-cold combined forging method is adopted, the production period is short, the material utilization rate is high, the machining cost is low, a metal streamline is not cut off, the grain structure is compact, the tooth surface strength is improved, the mechanical performance is high, and the matching requirements of new energy automobile parts can be met.

The invention discloses an automobile automatic gearbox gear sleeve and a manufacturing technology thereof. The automobile automatic gearbox gear sleeve comprises a hollow cylindrical body, and the outer wall of the hollow cylindrical body is provided with a large cylindrical section, a medium cylindrical section and a small cylindrical section which are sequentially decreased progressively in outer diameter. The wall of the small cylindrical section is provided with a gear profile. The hollow cylindrical body is formed by forging of a whole structure, a warm-and-cold combined forging method is adopted, an outer gear is formed through cold forging extruding, the production period is short, the material utilizing rate is high, the machining cost is low, the metal flow line is not cut off, the grain structure is compact, the gear surface strength is improved, the mechanical property is high, and the matching requirement of parts of new energy automobiles can be met.