282 results about "Extrusion moulding" patented technology

The invention discloses a spiral friction extruder and an extrusion forming method, comprising a first fixed beam, a movable beam, an outer sliding block, a second fixed beam, a first master cylinder, a perforating cylinder, a second master cylinder, a turntable, a central sliding block, a rotating extrusion rod, an extrusion barrel, a positive extrusion rod, etc.; the first fixed beam and the second fixed beam are fixed, the movable beam and the outer sliding block are located between the first fixed beam and the second fixed beam, the first master cylinder, the perforating cylinder, and the second master cylinder are fixed on the second fixed beam, the perforating cylinder is located on the central axis, the first master cylinder and the second master cylinder are connected to the outer sliding block to drive the outer sliding block to move; the central sliding block is connected to the perforating cylinder; the turntable is installed on the first fixed beam, and the turntable is driven to rotate by a driving device; the rotating extrusion rod is fixed on the turntable, and the extrusion barrel is fixed on the movable beam; the positive extrusion rod is fixed on the outer sliding block; the hopper is located above the extrusion barrel; the perforating needle is connected to the perforating cylinder; the concave die is fixed on the rotating extrusion rod, and the punch is fixed on the perforating needle.

The invention discloses a preparation method of a composite pipe for vibration and noise reduction, and relates to the technical field of metal material preparation, in order to solve the problems that an existing prepared composite pipe is poor in pressure resistance and vibration reduction and sound absorption capacities, the preparation method comprises the steps that an inner layer metal pipe, an outer layer metal pipe and foaming powder are integrally extruded and formed, and a pipe blank composite pipe blank is obtained; the pipe blank composite pipe blank is heated, rolling forming is conducted on the pipe blank composite pipe blank, the temperature of a contact interface between the structures of the pipe blank composite pipe blank is increased to a preset temperature, a metallurgical bonding target bonding interface is formed on the contact interface, and a target composite pipe blank is obtained; and the target composite pipe blank is placed in a heating furnace, the middle layer of the target composite pipe blank is foamed to form a foam metal layer, and the foam metal sandwich composite pipe is obtained. The preparation method provided by the invention is used for improving the compressive strength and the vibration reduction and sound absorption performance of the foam metal sandwich composite pipe.

The invention relates to the technical field of metal material plastic forming, and discloses an extrusion feeding device, an extrusion forming system and a control method.The extrusion feeding device comprises a loading module and a feeding driving module, and the loading module is arranged between an extrusion driving device and an extrusion forming device; a plurality of loading parts used for loading bars are distributed on the loading module, the plurality of loading parts extend and penetrate in the first direction, the loading module is provided with a heating assembly, and the heating assembly is used for heating the bars of the plurality of loading parts; the feeding driving module is used for driving the loading module to move in the direction perpendicular to the first direction so as to control the loading module to move out of or move into the working position between the extrusion driving device and the extrusion forming device. According to the invention, the heating assembly and the plurality of loading parts are adopted, bar material supplement and temperature stabilization are completed in the extrusion stroke, the extrusion temperature of the bar material can be accurately controlled, and the controllability of extrusion process conditions is ensured.

According to the cold extrusion forming process and die for the thin-wall pure aluminum camera shell, a 1060 pure aluminum plate serves as a blank, surface pretreatment, first extrusion, annealing, surface retreatment and second extrusion are conducted in sequence, and finally a small amount of machining is conducted to obtain a finished product. According to different extrusion procedures, dies matched with the method are divided into a floating radial extrusion die and a floating combined extrusion die, and each of the floating radial extrusion die and the floating combined extrusion die comprises an upper die assembly, a middle floating die assembly and a lower die assembly; the floating radial extrusion die forms a radial extrusion cavity in the die assembly process, first-order extrusion is completed, and a radial extrusion forging stock is obtained; and the floating combined extrusion die forms a combined extrusion cavity in the die assembly process, two-order extrusion is completed, and a combined extrusion forging stock is obtained. Radial extrusion and combined extrusion share the same press frame, the die cost is remarkably reduced, and the die is suitable for large-scale production of thin-wall pure aluminum camera shells in multiple scenes such as vehicle-mounted scenes and security and protection scenes.

The invention provides a rolling forming method for a complete shape follow-up streamline raceway of a tapered roller bearing, and belongs to the field of bearing preparation. According to the size of an outer ferrule of the tapered roller bearing, a blank is designed, the size of a blanked bar and the size of the blank are determined, blanking is conducted to obtain a material section, and the height-diameter ratio of the bar is controlled to be small in the blanking process; the bar is subjected to upsetting according to the upsetting ratio to obtain an intermediate material, the upsetting ratio is controlled to be small in the upsetting process of the bar, the intermediate material is subjected to extrusion forming and stamping to obtain a blank, and the blank is punched to form a ring blank; and the ring blank is rolled through the fully-closed hole pattern to achieve rolling path streamline follow-up forming to obtain a final forge piece, and the rolling ratio is controlled to be large under the condition that a core roller can be placed in the fully-closed hole pattern. The influence of the blanking process on subsequent blank making is considered, and the bar size and the blanking diameter are designed, so that the height-diameter ratio of the bar is as small as possible, and the radial flow of bearing ring metal at the stage is reduced; and in consideration of the influence of the upsetting process on subsequent rolling metal flow, a reasonable upsetting ratio is designed, so that the upsetting ratio is as small as possible, and the adverse influence of non-uniform deformation in the forging process on metal streamline distribution is reduced.

The invention discloses a thick-wall cylinder hot shearing extrusion short-process forming method based on a hollow casting blank, and belongs to the technical field of manufacturing of hard-to-deform alloy thick-wall cylindrical parts. The method comprises the following steps that 1, the thick-wall hollow casting blank is prepared; step 2, hot shearing extrusion; step 3, heat treatment; and step 4, finish machining. The hollow casting blank is prepared by adopting electroslag remelting or electroslag liquid pouring refining; according to the hot shearing extrusion, the hollow casting blank is directly subjected to hot extrusion forming through an annular cylindrical part shearing extrusion die, the technological processes of repeated heating, multi-step hot forging blank manufacturing and the like are omitted, one or two heating number forming is directly conducted, the production cost of materials, energy, manpower and the like can be reduced by about 15%-30%, and the forming and manufacturing efficiency of the annular cylindrical part is improved; the forming-forming effect of the thick-wall cylinder is improved, and meanwhile short-process forming manufacturing of the thick-wall cylinder is achieved.

The invention discloses an ultrahigh-strength heat-resistant Mg-Gd-Y-Zn-Zr-Yb wrought magnesium alloy and a high-temperature extrusion forming process thereof, and relates to the technical field of non-ferrous metal materials and processing thereof.The ultrahigh-strength heat-resistant Mg-Gd-Y-Zn-Zr-Yb wrought magnesium alloy is prepared from, by mass, 8.96 wt%-9.33 wt% of Gd, 3.72 wt%-4.12 wt% of Y, 1.17 wt%-1.25 wt% of Zn, 0.24 wt%-0.35 wt% of Zr, 0.23 wt%-0.53 wt% of Yb and the balance Mg and inevitable impurities; the high-temperature extrusion forming process comprises the following steps of preparation of a high-quality casting blank through a semi-continuous casting technology, high-temperature long-time solution treatment, high-temperature reverse extrusion and isothermal aging treatment. Wherein high-temperature backward extrusion is carried out at 400 DEG C, the extrusion ratio is about 7, quenching is carried out in cold water after extrusion, and then aging treatment is carried out; according to the ultrahigh-strength heat-resistant rare earth magnesium alloy prepared through the high-temperature backward extrusion forming technology, the yield strength is larger than or equal to 456MPa, the tensile strength is larger than or equal to 509MPa, and the ductility is larger than or equal to 4.3%; the ultrahigh-strength heat-resistant magnesium extrusion rod is of great significance in promoting the application of magnesium alloy in the high-tech fields of aerospace, national defense and military industry and the like.

The invention relates to the field of extrusion forming of piston skirts, in particular to an extrusion forming process of a large-size piston skirt of a marine diesel engine, which comprises the following steps of: placing a piston skirt raw material in a pre-forging annular die and a pre-forging lower die, pressing and moving downwards through a pre-forging convex die, forming a piston skirt pre-forging piece, taking out the pre-forging convex die, and replacing the pre-forging convex die with a finish-forging convex die; according to the method, the extrusion deformation process of the piston skirt is optimized, the internal metal deformation is smoother, the structure is more uniform, the metal flowing state of an area A with the most concentrated stress in the using process of the piston skirt is particularly improved, and the piston skirt forging is formed through downward pressing and movement of the finish-forging male die. And the overall quality is improved.

The invention relates to the technical field of magnesium alloys, in particular to a low-density, high-modulus and ultrahigh-strength magnesium-based composite material and a preparation method thereof.The preparation method comprises the steps that SiC reinforcement particles are pretreated; the raw materials are proportioned according to the mass percent of the components of the magnesium alloy; melting pure magnesium, sequentially adding alloy elements, uniformly stirring, cooling to a semi-solid temperature interval, adding the pretreated SiC reinforcement particles, and casting in a preheating mold to solidify, so as to obtain a magnesium-based composite material cast ingot; the cast ingot is sequentially subjected to solution treatment and extrusion forming; carrying out secondary solution treatment on the magnesium-based composite material bar subjected to extrusion forming; and performing rotary swaging deformation and intermediate annealing treatment on the magnesium-based composite material bar subjected to secondary solution treatment to obtain the ultrahigh-strength magnesium-based composite material. Therefore, the problems that in the prior art, magnesium alloy is insufficient in strength and modulus, a magnesium-based composite material easily generates casting defects and is difficult to deform at room temperature, and the performance of the material is weakened due to grain growth during high-temperature deformation are solved.

The invention discloses a preparation method and tool of a hydraulic actuator shell and the hydraulic actuator shell, relates to the field of metal material preparation, and aims to solve the problem that the interior of the shell cannot bear environmental high pressure in deep sea. The preparation method comprises the following steps: providing a composite tube blank which sequentially comprises an aluminum alloy layer, a first adhesive film layer, a carbon fiber layer, a second adhesive film layer and a stainless steel layer from inside to outside; heating the composite pipe blank, sleeving the composite pipe blank on an inner die, pushing the inner die to drive the composite pipe blank to penetrate through an annular die cavity formed by the inner die and an outer die to perform extrusion forming on the composite pipe blank in the radial direction, so that the aluminum alloy layer, the carbon fiber layer and the stainless steel layer are tightly combined; curing the composite pipe blank in a vacuum environment to obtain a composite pipe; and the two ports of the composite pipe are connected with the composite flanges correspondingly, the side, away from the composite pipe, of each composite flange is connected with the corresponding composite end cover, and the composite shell is obtained.

The invention relates to a vibration and stirring synergistic solid-phase friction extrusion additive manufacturing device and method, and belongs to the field of solid-phase additive manufacturing. The vibration and stirring synergistic solid-phase friction extrusion additive manufacturing device comprises a friction extrusion system, a vibration system and a cutting device; the friction extrusion system comprises a jacking shaft, a jacking rod, an electric spindle and a hollow shaft shoulder, the jacking shaft is used for providing upsetting force in the additive manufacturing process, and the jacking rod is used for conveying and pushing raw materials; the hollow shaft shoulder is used for high-speed rotation and friction with raw materials to generate heat, and the softened materials are subjected to extrusion forming; the vibration system is an ultrasonic vibration system or an eccentric shaft vibration system and provides high-frequency vibration and low-frequency vibration respectively; the cutting device is used for cutting arc lines and flashes on the surface of the workpiece. The vibration device and the solid-phase friction extrusion material adding device are coaxially installed, ultrasonic vibration is provided for the material adding process to improve the performance of a workpiece, and meanwhile the problem that the vibration effect is not uniform is solved; the cutting sleeve is installed on the shaft shoulder, the material adding and reducing processes are combined, the production procedures are reduced, and the production efficiency is improved.

The invention discloses a high-strength degradable aluminum alloy material and a preparation method thereof, and relates to the field of non-ferrous metal alloy preparation. The high-strength degradable aluminum alloy material comprises, by weight, 3.0%-7.0% of Zn, 0.5%-1.5% of Cu, 0.05%-0.35% of Zr, 0.1%-4.0% of Ga, 0.1%-2.0% of In, 0.1%-4.0% of Sn, 0.001%-1.5% of Li, 0.005%-0.05% of V, 0.005%-0.05% of Hf and the balance Al and inevitable impurities, the impurity content is smaller than or equal to 0.2%, the mass ratio of Ga to In is 2-3, and the mass ratio of Sn to In is 1-2. The high-strength degradable aluminum alloy material is prepared through the steps of smelting treatment, alloy casting, extrusion forming, heat treatment and the like, the high-strength degradable aluminum alloy material is a soluble aluminum alloy material, the tensile strength at the room temperature can reach 332 MPa, the yield strength can reach 264 MPa, the dissolution rate in a 3wt% KCl solution at the temperature of 90 DEG C is 120-195 mg / cm < 2 > / h, and the high-strength degradable aluminum alloy material has excellent mechanical properties and can be widely applied to the field of aluminum alloy materials. And the method can adapt to fracturing environments with high requirements such as deep well mining.

The invention belongs to the technical field of plastic processing, and discloses a processing method for reducing extrusion forming metal peeling, which comprises the following steps: plugging one end of a to-be-formed area of a pipe, performing shot blasting treatment on the to-be-formed area of the pipe, spraying a water-based colloidal graphite lubricant on the to-be-formed area of the pipe, and performing extrusion forming on the to-be-formed area of the pipe; and the pipe end sprayed with the water-based colloidal graphite lubricant is dried, a graphite dry film is formed outside a to-be-formed area, the pipe end of the to-be-formed area of the pipe is extruded into a high-temperature forming mold, in the pipe shrinking process, pits formed through shot blasting are gradually deformed, the graphite dry film is gradually discharged out of the pits, and supplement of the lubricant is formed. According to the method, the pipe end lubricating form is improved, the improved lubricating performance is improved, the metal stripping condition in the extrusion forming process is basically eliminated, and the product percent of pass is increased. In the implementation process, all the steps are simple and practical technological methods, implementation is easy through automatic and integrated means, efficiency can be improved for mass production, and cost can be reduced.

The invention provides a backward extrusion forming die of a cylindrical component and a backward extrusion forming method thereof.The die comprises an upper die assembly and a lower die assembly, the upper die assembly comprises an upper die plate and a punch, the lower die assembly comprises a lower die plate, a bottom die and a dismounting die, a lower die hole is formed in the top face of the bottom die, and a lower die hole is formed in the bottom die; the detachable die is provided with an upper die hole penetrating through the upper end and the lower end of the detachable die, the hole diameter of the upper die hole is larger and larger from top to bottom, and the detachable die comprises a plurality of split dies arranged in the circumferential direction of the lower die hole. The split dies have the closing state that the split dies are spliced to form the upper die hole and the demolding state that the split dies are separated from one another, and when the split dies are in the closing state and die closing of the upper die assembly and the lower die assembly is completed, the space among the lower die hole, the upper die hole and the punch forms a forming die cavity of the cylindrical component. According to the mold, excessive waste of materials in the prior art is effectively avoided, and convenient demolding of the conical shell with the steps formed through the backward extrusion process can be achieved.

The application discloses a forming and machining die for a motor shell and belongs to the technical field of die machining. The forming and machining die for the motor shell comprises a main body, two shaking mechanisms are arranged in the main body, the shaking mechanism comprises a track rod, a first linear area and a second linear area for the motor shell to enter and exit the die are arranged in the track rod, a floating area for vibrating the motor shell is arranged between the first linear area and the second linear area, a demolding mechanism is correspondingly arranged in the track rod, the demolding mechanism comprises two connecting rods, telescopic built-in rods are sleeved on the two connecting rods, and a plurality of supporting columns are arranged in the two built-in rods and slide along the track rod. The demolding mechanism and the shaking mechanism can gradually extrude and form the motor shell when the machining die works, the investment of external equipment is reduced, the motor shell can be quickly demolded in the alternating process, and the machining efficiency is improved.

The utility model discloses an extrusion mold core for a cable, which comprises a main body 1, two ends of the main body 1 are respectively a connecting end 1.1 and an extrusion end 1.2, the outer side of the main body 1 is in the shape of a cone of which the diameter is reduced from the connecting end 1.1 to the extrusion end 1.2, the main body 1 is axially provided with a conical hole 1.3 of which the diameter is reduced from the connecting end 1.1 to the extrusion end 1.2, and the outer side of the main body 1 is in the shape of a cone of which the diameter is reduced from the connecting end 1.1 to the extrusion end 1.2. A conical hole 1.3 is formed in the middle of the body 1, an extrusion hole 1.4 is formed in the tail end of the conical hole 1.3, a copper pipe 2 is fixedly connected into the extrusion hole 1.4, the length of the copper pipe 2 is smaller than that of the extrusion hole 1.4, and the end, away from the conical hole 1.3, of the copper pipe 2 is located in the extrusion hole 1.4. The utility model provides the extrusion molding die core for the cable, which can avoid high-temperature heat transfer caused by contact between a conductor and an extrusion hole when the conductor penetrates out of the extrusion hole, avoid oxidation of the extrusion hole and ensure the extrusion molding quality.

The present invention discloses a die for uniformly extruding a magnesium alloy profile, which includes a punch assembly installed below the upper template of a press and a die assembly installed above the lower template of the press; the punch assembly is formed with a punch body protruding downward; the die assembly forms a material receiving cavity with an open top directly below the punch body. The material receiving cavity is for placing a blank and for the punch body to insert downward. The bottom of the material receiving cavity forms an extrusion surface, and the extrusion surface conducts downward to form a main cavity and a plurality of fin-shaped cavities connected around the main cavity. The main cavity and the plurality of fin-shaped cavities together form a contour corresponding to the workpiece. The extrusion surface is respectively concave downward between every two adjacent fin-shaped cavities to form a current-limiting groove. Each current-limiting groove forms a first groove surface near the main cavity to limit the flow of the blank to the main cavity and a second groove surface near the fin-shaped cavity to limit the flow of the blank to the fin-shaped cavity. The present invention enables the blank to uniformly flow to the main cavity and the fin-shaped cavities during the extrusion forming process.

The application discloses a high specific strength high-elongation 6-series aluminum alloy anti-collision beam, which comprises a base, the upper side walls of the base are symmetrically fixedly connected with vertical plates, the opposite sides of the two vertical plates are fixedly connected with support plates, the upper side walls of the two support plates are fixedly connected with a smelting furnace, a stirring mechanism is arranged on the smelting furnace, a feeding port is formed in the upper side wall of the smelting furnace, and arc-shaped blocks are arranged on the inner bottom wall of the smelting furnace. The anti-collision beam combines the advantages of 6082 alloy and 7003 alloy, has good extrusion forming performance, the strength is greater than 340 MPa, the elongation is greater than or equal to 15%, and the elongation is improved by more than 10% compared with the 6082 alloy. The rare earth rhenium is added to refine the grains and improve the alloy strength, and the 6-series profile is subjected to double-stage aging strengthening, so that the elongation of the alloy is further improved.

The application discloses an on-line cutting device and method for continuously extruding and forming metal pipes, which comprises a follow-up system, a cutting system and a supporting structure. The cutting system can make the pipe cutting cutter produce transverse movement to cut the pipe. The follow-up system can make the movement speed of the cutting system consistent with the movement speed of the extruded pipe. The on-line cutting device and cutting method can adapt to the needs of the continuous extrusion and formation of the pipe, and can realize industrialization and large-scale production.

The application provides a rolling forming method for a complete conformance streamline raceway of a tapered roller bearing, and belongs to the field of bearing preparation. A blank is designed according to the size of an outer ring of the tapered roller bearing, the size of a bar material for blanking is determined, the blank is obtained by blanking, and the height-diameter ratio of the bar material is controlled to be small during the blanking process. The intermediate material is obtained by upsetting the bar material according to the upsetting ratio, the upsetting ratio of the bar material is controlled to be small during the upsetting process of the bar material, the intermediate material is obtained by extrusion forming and stamping, the blank is punched to obtain a ring blank, the ring blank is rolled by using a full-closed pass to realize the conformance streamline forming of the raceway and obtain a final forging, and the rolling ratio is controlled to be large under the condition that a core roller can be put into the full-closed pass. The application considers the influence of the blanking process on subsequent blank making, designs the volume of the bar material and the blanking diameter, makes the height-diameter ratio of the bar material as small as possible, and reduces the radial flow of the bearing ring metal in this stage. The application considers the influence of the upsetting process on the metal flow in subsequent rolling, designs a reasonable upsetting ratio, makes the upsetting ratio as small as possible, and reduces the adverse influence of uneven deformation in the forging process on the metal streamline distribution.

The invention provides a multi-inclined-hole die arc-shaped material extrusion forming device and a multi-inclined-hole die arc-shaped material extrusion forming method. The method is characterized in that a plurality of discretely distributed mold holes are prefabricated in a mold according to a certain distribution characteristic, the axis of each prefabricated hole and the extrusion axis form a certain angle, and meanwhile, the stress state and the flow behavior distribution situation of an extrusion material at a mold orifice can be influenced by adjusting the thickness of the mold; therefore, local acting force on the mold disc is dispersed, accumulated shear deformation borne by the blank is further increased, quantitative regulation and control over the microstructure, the curvature radius and the change characteristics of the extruded arc-shaped material are achieved, and the service life of the mold is remarkably prolonged. According to actual requirements, key process parameters such as the number, the axis included angle, the geometrical shape, the inlet and outlet layout extrusion ratio and the arrangement form of the prefabricated holes can be flexibly set, and the requirements of personalized and customized arc-shaped materials can be met; the process flow is greatly reduced, the production efficiency is obviously improved, the production cost is reduced, the surface quality and the shape and size precision of a formed product are obviously improved, and a plurality of high-performance arc-shaped material products with curvature characteristics can be directly and simultaneously extruded and formed at one time.

The invention provides a forming process of a complex structural part, which mainly comprises the following steps of: firstly, respectively designing a compaction sintering die and an extrusion forming die according to the shapes of a rough blank and the structural part, and carrying out multidirectional compaction on metal powder added into a die cavity of the compaction sintering die by utilizing the compaction sintering die to obtain the rough blank; the rough blank and the compaction sintering mold are put into sintering equipment together to be sintered, demolding is conducted after sintering, and a sintered blank is obtained; and the sintered blank is subjected to multi-directional extrusion forging through an extrusion forming die. According to the method, powder metallurgy and the multi-directional extrusion forging process are combined, the forming difficulty of the complex structural part is reduced, on one hand, the strength and the coherent structure of the joints of all the parts of the final structural part are guaranteed, and on the other hand, the overall forming precision and strength of the final structural part are guaranteed.

This invention discloses an isothermal extrusion method for aluminum alloys based on data feedback optimization control, belonging to the field of metal material processing technology. The method includes: Step 1, extruding an aluminum alloy rod at a preset initial temperature and a preset initial extrusion speed; Step 2, acquiring the extrusion exit temperature of the aluminum alloy rod in real time, and determining in real time whether the extrusion exit temperature is not less than a preset maximum temperature. If so, adjusting the extrusion speed in real time using a preset control equation until the current aluminum alloy rod extrusion is completed; Step 3, acquiring the function of the extrusion speed changing with time during the current aluminum alloy rod extrusion process, and correcting the function to obtain the corrected speed for extruding the next aluminum alloy rod; Step 4, if further extrusion is needed, extruding the next aluminum alloy rod at a preset initial temperature and corrected speed, and returning to Step 2 for repeated execution. This invention can significantly improve the efficiency and quality of aluminum alloy extrusion forming.

The application provides a three-step forming cold extrusion process method and a forming die for a firing pin, which comprises the following steps: pre-cutting, pre-cutting two adjacent part material sheets apart by using a pre-cutting punch and a pre-cutting die; pre-forming, pressing the required material of the part into a material storage hole by using a pre-forming punch and a pre-forming die, and extruding the excess material into the extrusion area of the next working step; rough forming, rough forming of the part is completed by using a rough forming punch and a rough forming die; trimming the excess material, the material extruded in the pre-forming and rough forming steps is cut off by using a trimming punch and a trimming die, so that the edge of the material is ensured to be free of cracks; fine forming, fine forming of the steel strip is performed by using a fine forming punch and a fine forming die. The three-step forming cold extrusion process method breaks through the bottleneck in the cold extrusion forming process of small high-strength, high-precision and special-shaped metal parts, significantly improves the forming efficiency and improves the forming quality. The forming quality of the firing pin obtained by the forming die is high.

The invention discloses an internal expanding and external rotating combined extrusion forming method and device for multiple inner ring ribs or bosses of a cylindrical part. The device comprises an internal expanding mechanism, an axial loading mechanism, a radial loading mechanism and a rotating loading mechanism. The internal expanding mechanism comprises a sectioning module consisting of first sectioning molds and second sectioning molds which are alternately arranged; the first split die is provided with an inner inclined surface matched with the inclined surface of the wedge block and a side inclined surface matched with the plane of the second split die; the bottom of the sectioning module is in sliding fit with the T-shaped groove of the base through the T-shaped hanging table. The method comprises the steps that an axial loading mechanism is started to drive a wedge block to move downwards, so that a sectioning module is synchronously expanded in the radial direction, the inner wall of a blank is extruded, and an inner ring rib or a boss is preliminarily formed; and the rotary loading mechanism is started to drive the internal expanding mechanism and the blank to rotate, meanwhile, the radial loading mechanism is started to drive the conical roller to continuously roll the outer wall of the blank, and final forming is completed.

The utility model discloses a steering gear shaft helical tooth extrusion die which comprises an upper die fixedly connected with a press sliding block, a lower die fastened with a workbench and a large nut installed on the lower die and used for locking and loosening the lower die, the large nut is located on the lower die in the direction close to the upper die, and the upper die and the lower die are coaxially installed. The upper die extrudes towards a forge piece between the upper die and the lower die, the forge piece is extruded in a spiral working belt on the lower die to form a spiral tooth shape, and after the upper die moves downwards to a limited position, the spiral tooth shape on the forge piece is extruded; the upper ejector rod and the lower ejector rod of the workbench move upwards and drive the forge piece to move upwards, the spiral teeth on the forge piece drive the forming female die on the lower die body to rotate reversely, the forge piece is made to be smoothly separated from the lower die body, the die is used for one-time extrusion forming of the spiral teeth, the material utilization rate is increased, and the production efficiency is greatly improved. And the forged helical teeth are high in strength.

The invention discloses a contact pin part cold extrusion forming process, a die and a die using method. The contact pin part cold extrusion forming process comprises the steps of bar punching and blanking, sand blowing, cleaning, primary extrusion, deburring, sand blowing, cleaning, secondary extrusion and machining. The forming die comprises a first-order extrusion die and a second-order extrusion die. Through combination of first-order extrusion and second-order extrusion, material flow of the first-order extrusion and the second-order extrusion can be reasonably distributed, plastic forming of metal is facilitated, and the service life of the die is prolonged; as the junction of the waist-shaped column and the T-shaped connecting main body is in a sharp corner state, a forge piece forming metal flowing mode is changed through a two-sequence extrusion mode, the problem of material tearing at the sharp corner is avoided, the streamline of the part is complete, the mechanical property is good, and the conductivity of the part is ensured; secondary forming is matched with little machining, the cutting allowance and the cutting face are reduced, the utilization rate of raw materials is increased, the production efficiency is improved, the production cost is reduced, and the market competitiveness is improved.

The invention discloses a high-strength corrosion-resistant Mg-Gd-Y-Zn-Zr-Al wrought magnesium alloy and a high-temperature extrusion forming process thereof, and relates to the technical field of non-ferrous metal materials and processing thereof.The magnesium alloy comprises, by mass, 8% of Gd, 4% of Y, 1.2% of Zn, 0.3% of Zr, 0.2-0.5% of Al and the balance Mg and inevitable impurities. The high-temperature extrusion forming process comprises the following steps of preparation of a high-quality casting blank through a semi-continuous casting technology, high-temperature long-time solution treatment, high-temperature reverse extrusion and isothermal aging treatment. Wherein high-temperature backward extrusion is carried out at 400 DEG C, the extrusion ratio is about 7, and quenching is carried out in cold water after extrusion; test results show that the yield strength of the high-strength corrosion-resistant rare earth magnesium alloy prepared through the high-temperature backward extrusion forming process is larger than or equal to 328 MPa, the tensile strength is larger than or equal to 372 MPa, and the ductility is larger than or equal to 19.0%; and the high-strength corrosion-resistant magnesium extrusion rod is successfully prepared and has important significance in promoting the application of magnesium alloy in the high-tech fields of aerospace, national defense and military industry and the like.

The invention belongs to the field of forming methods, and discloses an impact hydraulic multi-step forming process method, which comprises the following steps of: placing a plate blank on a die body, enabling the plate blank to be positioned below a concave die, and keeping a first preset distance between the plate blank and the concave die; and a punch arranged in the die body is driven to move towards the plate blank, the forming liquid contained in the die body is extruded through the punch, the forming liquid forms high-speed jet flow, first-time hydraulic impact is conducted on the plate blank, and the plate blank generates local or overall deformation towards the female die. After the first impact is completed, the punch is controlled to return to the initial position, the position of the female die is adjusted, and a second preset distance is formed between the female die and the plate blank. And the second preset interval is smaller than the first preset gap, the forming liquid is more difficult to leak from the edge area of the plate blank, and the liquid pressure of the forming liquid can be increased. And the punch is driven again to move towards the plate blank, the extrusion forming liquid generates second jet flow to impact the plate blank, the plate blank is further subjected to plastic deformation and finally completely attached to the female die molded surface, and final forming of the plate blank is achieved.

The utility model relates to the technical field of cold extrusion forming, in particular to a combined type bevel gear cold extrusion tool which comprises an upper bottom plate and a lower bottom plate, the bottom of the upper bottom plate is in bolted connection with an upper fixing plate, and the bottom of the upper fixing plate is in bolted connection with a punch fixing plate. Through the punch fixing plate, the guide column, the punch, the positioning plate, the pin and the positioning block, the upper die and the lower die of the device are matched with the guide grooves of the lower fixing plate and the positioning plate through the guide column, and the guide column is in clearance fit with the guide grooves of the lower fixing plate and the positioning plate, so that the accuracy of the cold extrusion bevel gear can be ensured; according to the split assembly mode, different materials can be selected according to stress conditions of different parts, abrasion and deformation of the tool can be effectively reduced, the service life of the tool can be prolonged, if a certain part of the tool is abraded, the part of the tool can be replaced, and the cost is reduced. Maintenance and replacement are simple, and the replacement cost is low.