1250results about "Extrusion dies" patented technology

The invention discloses an extrusion production process for an aluminum alloy multi-cavity profile. The extrusion production process comprises the following steps that S1, raw materials are prepared; s2, designing and manufacturing a mold; s3, pretreatment before extrusion; s4, extrusion forming; s5, cooling treatment; s6, straightening and finishing; s7, aging treatment; and S8, detecting and packaging. According to the invention, the friction is further reduced by adopting a special high-temperature lubricant and an ultrasonic vibration device in the pre-extrusion pretreatment, the precise control is realized by arranging real-time monitoring and feedback systems such as a laser range finder and an infrared thermometer in the extrusion forming process, and the cooling treatment is realized by automatically adjusting parameters by adding a corrosion inhibitor and arranging a sensor, so that the production efficiency is improved. The cooling quality of the profile is ensured; laser scanning and electrolytic polishing technologies are adopted for straightening and finishing, the straightening precision and the surface quality are improved, a circulating hot air system and a segmented aging mode are adopted for aging treatment, and the aging effect is improved.

The invention discloses an extrusion forming device and method, the extrusion forming device comprises an extrusion container assembly, a mold assembly and an extrusion assembly, the extrusion container assembly is provided with at least two mutually independent blank cavities, and the cross section of at least one blank cavity is non-circular; the mold assembly comprises a gradual change type flow channel structure, a welding chamber structure and a mold outlet structure, the gradual change type flow channel structure comprises at least two mold flow channels, and the inlet ends of the at least two mold flow channels are in butt joint with the outlet ends of the at least two blank cavities in a matched mode; the at least two mold runners are used for carrying out plastic deformation on the metal blanks in the blank cavities and guiding the metal blanks to the welding chamber structure, and the welding chamber structure is used for carrying out interface welding on metal from the different mold runners; and the extrusion assembly is used for extruding the metal blanks in the at least two blank cavities. The extrusion force can be obviously reduced, the material flow uniformity is improved, the die complexity and material waste are reduced, the profile forming quality is improved, and the service life of the die is prolonged.

The invention discloses multifunctional lead brick extrusion equipment with a replaceable mold, relates to the technical field of lead processing, and aims to solve the problems of production stagnation and economic loss caused by idle equipment due to long consumed time of the whole process when the mold is replaced in the prior art, the multifunctional lead brick extrusion equipment comprises a base, and the top of the base is fixedly connected with a plurality of guide frames; the outer wall of the guide frame is slidably connected with a pair of symmetrically arranged extrusion plates, the bottom of the extrusion plate on the lower side is fixedly connected with the top of the base, the top of the guide frame is fixedly connected with a top cover, and the bottom of the top cover is fixedly connected with a hydraulic rod; and the other end of the hydraulic rod is fixedly connected with the top of the extrusion plate on the upper side, a pair of piston cylinders are arranged on the top of the base, and corresponding molds are arranged on the opposite faces between the extrusion plates. The method has the advantage that the idle time of equipment caused by die replacement is greatly shortened.

The invention aims to provide a device and method for preparing a magnesium alloy plate through bidirectional stepped differential extrusion, and belongs to the technical field of light metal plastic forming, the device comprises an external mold frame, an internal bidirectional stepped differential extrusion torsion shearing mold and bidirectional stepped differential extrusion equipment; the bidirectional stepped differential extrusion process comprises four processes: a first stage of pre-extrusion forming, a second stage of asymmetric torsion induced deformation, a third stage of shear strengthening and a fourth stage of split-flow shaping, and through the device and the method provided by the invention, three times of texture weakening effect and four times of grain refinement process in a single extrusion process are realized. And compared with a traditional equal channel angular extrusion process, the energy consumption is reduced, meanwhile, the production efficiency is improved, and an innovative solution is provided for preparing the fine-grain weak-plane texture magnesium alloy.

The invention belongs to the technical field of inner spherical cage forward extrusion dies, and particularly relates to an inner spherical cage forward extrusion die structure which comprises a base, a heating cylinder, guide sleeves, an annular frame, a thermosetting positioning mechanism and a bulletproof extrusion mechanism, the heating cylinder is arranged on the upper wall of the base, the upper end of the heating cylinder is open, and the guide sleeves are arranged on the inner wall of the heating cylinder in a penetrating mode; the annular frame is arranged on the side, away from the heating cylinder, of the guide sleeve, the thermosetting positioning mechanism is arranged on the heating cylinder, the bulletproof extrusion mechanism is arranged on the thermosetting positioning mechanism, and the thermosetting positioning mechanism comprises a limiting mechanism, a clamping mechanism, a heating mechanism and a cooling mechanism. According to the forward extrusion die structure for the inner ball cage, the shape and the size of the inner ball cage formed at high temperature after cooling and shaping can be guaranteed, and the demolding difficulty can be reduced.

The invention relates to the technical field of extrusion dies, and discloses an aluminum alloy extrusion forming die for automobile covering parts, which comprises an extrusion die upper die and an extrusion die lower die, the extrusion die upper die and the extrusion die lower die are mutually clamped, and a die core is fixedly mounted at the bottom of the extrusion die upper die. A working belt matched with the mold core is arranged in the lower mold of the extrusion mold; the flow adjusting mechanism is used for adjusting the flow uniformity of the batch materials in the flow dividing holes by adjusting the position of the flow dividing piece; by arranging the flow adjusting mechanism, a connecting piece can be driven to move in a second movable groove by moving an adjusting piece, a flow dividing piece can be driven to rotate with a connecting rotating shaft as the axis by moving the connecting piece, and the size of a flow dividing hole can be adjusted by adjusting the position of the flow dividing piece in the flow dividing hole; accordingly, corresponding adjustment is carried out according to different batch materials, and meanwhile the flow dividing holes can be adjusted according to the actual forming state of the sectional materials.

The invention relates to the technical field of extrusion dies, in particular to an aluminum profile variable cross-section extrusion die based on a telescopic die core structure, which comprises an upper die structure, a lower die structure and a die hole formed in the lower die structure, and a moving unit I for driving the mold core structure to move up and down at a fixed height is mounted on the upper mold structure. By arranging the telescopic mold core structure, the mold core structure is provided with the multiple extrusion sections which are gradually reduced from top to bottom, and when the first moving unit drives the mold core structure to move up and down at the same height, the extrusion sections of different sizes can be moved to the positions matched with the mold holes; when the extrusion sections with different sizes are matched with the die holes, different gaps can be reserved, aluminum profiles with different wall thicknesses can be extruded, different dies do not need to be replaced, the manufacturing cost is reduced, and the production efficiency is improved.

The invention discloses an asymmetric extrusion preparation method for a heterogeneous magnesium alloy composite board with an adjustable layer thickness ratio. The method comprises the steps that an asymmetric extrusion die with an extrusion outlet deviating from the center is designed, and an extrusion deformation section is of a triangular section in the thickness direction and of an isosceles trapezoid section in the width direction; a VK41 magnesium alloy, a ZK61 alloy and pure magnesium are machined into blanks with the thicknesses of A, B and C, the blanks are combined according to the EZP sequence after homogenization treatment, the blanks are heated to 350-400 DEG C, heat preservation is conducted, and the extrusion speed is 1-2 mm / s; extruding by adopting an asymmetric die, and placing pure magnesium on the alpha angle side to obtain a three-layer composite board; and carrying out folding or V-shaped bending test on the processed sample. By regulating and controlling the ratio of A: B: C and the extrusion shrinkage angle, accurately controlling the layer thickness ratio, introducing shear strain to improve the texture, coordinating the tension and compression asymmetry and remarkably improving the bending performance, the process is simple, and the method is suitable for industrial production and is suitable for the fields of aerospace, automobiles and the like.

The invention relates to the technical field of part forming machining, and discloses head and flange one-time extrusion forming equipment which comprises an extrusion module. The extrusion module comprises an upper die, a lower die, an upset head die, a driving assembly and a positioning assembly, the upper die and the lower die further comprise positioning inserts, head inserts and forming inserts, and the positioning inserts, the head inserts and the forming inserts are detachably installed on the upper die plate and the lower die plate. The complex process that the flange needs to be upset independently and then the head needs to be upset during machining and manufacturing of a traditional stamping die and a forging machine is avoided, the production process is simplified, and the production efficiency is improved. Products of various specifications and sizes are manufactured by quickly replacing inserts and upset head dies of different specifications, quick remodeling is achieved, automatic feeding is achieved by arranging the feeding module, the feeding module is used for automatically feeding blanks to the extrusion module, and the machining and production efficiency is further improved.

The present invention proposes a continuous uniform speed metal extruder and extrusion process, the extruder comprises: an extrusion device, a compaction wheel and an extrusion wheel whose axes are parallel to each other, a coaxial annular groove is provided on the side of the extrusion wheel; a feed port and a plug slot for embedding a plug are provided on the extrusion device, the plug slot is located behind the feed port, and a rear guide area is formed between the plug slot and the feed port, a part of the plug is embedded in the plug slot, and the other half protrudes out of the plug slot and extends to the outside of the rear guide area to abut against the metal rod. In the present invention, the plug position is moved back a distance, that is, the plug and the feed port are separated, and a rear guide area is designed. After the copper rods are piled up and compressed, they are plastically deformed and flow into the mold cavity feed port from the front guide area and the rear guide area. All of them flow in after being fully thermoplastically deformed, and the metal structure of the product cross section is uniform.

The utility model discloses an extrusion die for an asymmetric-section 2195 aluminum-lithium alloy section for aerospace. The extrusion die is provided with a pre-deformation cavity, a flow guide cavity and a working belt, wherein the pre-deformation cavity is used for preliminarily deforming a blank towards the section of the section; the flow guide cavity is used for adjusting metal flow in different areas; the pre-deformation cavity and the flow guide cavity are arranged in a stepped mode in the direction of the working belt, the cavity walls of the flow guide cavity are provided with different offsets and flow guide inclination angles according to the section characteristics of the sectional materials and the flowing characteristics of metal, the purpose of directly extruding the straight sectional materials can be achieved through the working belt arranged in a two-stage mode, the product has good perpendicularity, the appropriate section size is obtained, and the production efficiency is improved. And the twisting defect is reduced.

The utility model discloses a U-shaped battery box cover plate broadsiding extrusion die which comprises a broadsiding material channel and a horizontal flow die, and the broadsiding material channel is composed of a first-stage broadsiding material channel and a second-stage broadsiding material channel; the broadening rate of the first-stage broadening material channel is 55-60%, the broadening rate of the second-stage broadening material channel is 25-30%, and the broadening rate of the whole broadening material channel is 90-99%. By arranging the two stages of broadening material channels, the broadening rate of 99% can be achieved and far exceeds the broadening amplitude of an existing mold, and the effects that large materials can be discharged through a small machine, and the aluminum extrusion production cost is greatly reduced can be achieved.

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 belongs to the technical field of reverse extrusion dies, and particularly relates to a warm forging reverse extrusion die device which comprises a main body and a cleaning assembly arranged on the main body and further comprises a forging and pressing mechanism and a pretreatment assembly, the forging and pressing mechanism is arranged on the main body, and the pretreatment assembly is arranged on the main body; the forging and pressing mechanism comprises a reverse extrusion die, a die wall spraying assembly and an air outlet assembly, the reverse extrusion die is arranged on the forging and pressing mechanism, the die wall spraying assembly is arranged on the forging and pressing mechanism, and the air outlet assembly is arranged on the reverse extrusion die; through the arrangement of the forging and pressing mechanism, nitrogen compressed in a nitrogen storage tank enters a compression cavity through an output pipe II, enters a vent pipe through a round hole after being mixed with an atomized lubricant, and finally is sprayed out and sprayed on the inner wall of the mold cavity through an air outlet I, so that micron-sized liquid drops are formed to cover the surface of the inner wall of the mold cavity, and the friction coefficient is reduced.

The utility model belongs to the technical field of extrusion dies, and discloses a thick point feeding anti-direct-punching die which comprises an upper die and a lower die which are detachably connected together, a feeding hole area is formed in the upper die, the feeding hole area comprises two thin material feeding hole areas used for feeding and forming aluminum profile thin material areas, and the two thin material feeding hole areas are communicated with each other. A thick material feeding hole area used for feeding a formed aluminum profile thick material area is arranged on the upper die and located between the two thin material feeding hole areas, a flow guide slope is arranged on the side wall, close to the lower die, of the thick material feeding hole area, and a welding chamber area is arranged at the position, corresponding to the feeding hole area, of the face, close to the upper die, of the lower die. A forming cavity is formed in the welding chamber area; according to the utility model, the overall structure is simple, the flow rate can be controlled during thick point feeding in the aluminum profile extrusion production process, the phenomena of aggravated die wear and unstable profile size caused by the direct punching phenomenon during thick point feeding are avoided, and the use effect is improved.

The utility model provides an aluminum alloy profile mold, which is integrally formed and includes a shell, and the upper surface of the shell is provided with three guide grooves, wherein the first guide groove, the second guide groove and the third guide groove are respectively located at the three vertices of a virtual triangle, and the first guide groove, the second guide groove and the third guide groove are connected through a working belt. The utility model optimizes the mold structure to obtain an aluminum alloy profile of a control arm profiling structure, which can reduce one flattening and bending process when manufacturing the control arm, reduce the forging deformation, better suppress the generation of forging coarse grain rings, improve the quality while reducing the production cost, and can ensure the dimensional stability of the aluminum alloy profile product, improve the production efficiency and the product qualification rate.

The invention provides a tee joint cold-pushing one-time forming device and a tee joint cold-pushing one-time forming process, and belongs to the technical field of three-pushing pipes. A three-way rack; the three-way cold pushing table is arranged at the upper end of the three-way rack; the three-way pipe placing groove is formed in the upper end of the three-way cold pushing table; the three-way forming groove is formed in the lower inner wall of the three-way pipe placing groove; the number of the hydraulic fixing devices is two, and each hydraulic fixing device comprises a clamping pressurizing block, a three-way pipe hydraulic clamping block, a three-way pipe fixing ring, a first oil groove, a front pushing block, a hydraulic oil connecting groove, a second oil groove, an oil groove partition plate, an oil groove communicating hole, a clamping inserting rod, an oil groove plugging block, a sliding-in sleeve and a sealing ring; the linearity and synchronism of the clamping action are effectively guaranteed, and deviation or clamping stagnation in the clamping process is prevented.

A process for forming extruded products using a device having a scroll face configured to apply a rotational shearing force and an axial extrusion force to the same preselected location on material wherein a combination of the rotational shearing force and the axial extrusion force upon the same location cause a portion of the material to plasticize, flow and recombine in desired configurations. This process provides for a significant number of advantages and industrial applications, including but not limited to extruding tubes used for vehicle components with 50 to 100 percent greater ductility and energy absorption over conventional extrusion technologies, while dramatically reducing manufacturing costs.

The invention discloses a magnesium alloy plate strip direct connection forming method and equipment system, and solves the problems of discrete process, serious oxidation and high energy consumption of a wide and thin magnesium plate. The method is realized through direct connection and cooperative control of the whole process of casting, extrusion, warm rolling and annealing, wherein a gradient solidification mold is adopted to control melt phase change, and high-frequency short-stroke stepping extrusion and dovetail groove dummy ingot are combined; pressing head return synchronously triggers a rolling mill and a loop box to perform warm compensation connection extrusion-warm rolling; tension is regulated and controlled through fuzzy PID; two-stage filtration, electromagnetic-ultrasonic composite grain refinement and CVC + AGC warm rolling are integrated; and the rolled plate is directly annealed in a nitrogen protection mobile coiling furnace. Continuous production of four procedures is achieved, oxidation heat loss is reduced, efficiency is improved by more than 50%, energy consumption per ton is smaller than or equal to 0.8 tce, the defect rate is smaller than or equal to 0.5%, the service life of a die is longer than or equal to 5000 times, thin plates with the width larger than 800 mm and the thickness + / -0.1 mm (for example, the tensile strength of AZ31 is larger than or equal to 350 MPa) can be stably produced, and the ductility is improved by 40%. The method is suitable for high-efficiency and low-consumption manufacturing of high-performance lightweight magnesium plates in the fields of aerospace and automobiles.

A process for forming extruded products using a device having a scroll face configured to apply a rotational shearing force and an axial extrusion force to the same preselected location on material wherein a combination of the rotational shearing force and the axial extrusion force upon the same location cause a portion of the material to plasticize, flow and recombine in desired configurations. This process provides for a significant number of advantages and industrial applications, including but not limited to extruding tubes used for vehicle components with 50 to 100 percent greater ductility and energy absorption over conventional extrusion technologies, while dramatically reducing manufacturing costs.

The invention discloses an automatic metal pipe extrusion forming device for a vacuum pump, and relates to the technical field of metal pipe preparation, the automatic metal pipe extrusion forming device comprises an extruder, a feeding hopper is fixedly connected to the top surface of the extruder, a cavity is formed in the side wall of the extruder, a cooling cavity is formed in the bottom end of the extruder, and a fixing frame is fixedly connected to the end surface of the extruder; a motor is installed in the fixing frame, a screw rod is fixedly connected to the output end of the motor, and a flow dividing block is fixedly connected to the inner surface of the output end of the extruder. The cooling device has the advantages that the cooling efficiency of the metal pipe and the production efficiency of the metal pipe can be synchronously adjusted, the material blocking phenomenon is avoided, and normal production work is guaranteed; meanwhile, manual step-by-step operation is not needed, control elements are correspondingly reduced, the wire arrangement difficulty and cost input are reduced, meanwhile, the cooling mechanism and the extruder coincide, external matching devices are not needed, and therefore the occupied area of the device is greatly reduced, and the working space can be fully utilized.

The invention discloses a multi-hole extrusion micro-channel flat pipe mold and a preparation method thereof, and relates to the technical field of micro-channel flat pipe molds, the multi-hole extrusion micro-channel flat pipe mold comprises a foundation bottom plate, two fixing side plates are arranged on the upper surface of the foundation bottom plate, a mold mechanism is further arranged on the upper surface of the foundation bottom plate, and the mold mechanism comprises a sliding assembly and a forming assembly; the sliding assembly comprises a sliding bottom plate, the sliding bottom plate is arranged on the upper surface of the foundation bottom plate, a sliding groove facilitating sliding of the sliding bottom plate is formed in the upper surface of the foundation bottom plate, the forming assembly comprises an auxiliary mounting frame and a main mounting frame, and the auxiliary mounting frame is fixedly mounted on the upper surface of a sliding auxiliary plate. By arranging the mold mechanism, efficient assembly and disassembly of the mold are achieved, the working efficiency before and after use is improved, the problem that flat pipe forming is unstable due to residual metal in the mold is solved, and the production quality is improved.

The invention discloses a metal profile split-flow extrusion die with a cooling structure, comprising: a die body with an extrusion forming channel; the die cushion is arranged at the rear end of the die body, a discharging channel communicated with the extrusion forming channel and a plurality of exhaust grooves are formed in the die cushion, the exhaust grooves are distributed around the discharging channel at intervals, the air outlet end of each exhaust groove is communicated with the discharging channel, and a bottom plate made of thermal expansion materials is arranged at the bottom of each exhaust groove. The expansion amount of the bottom plate is in direct proportion to the temperature, the sectional area of the exhaust groove where the bottom plate is located can be changed through expansion of the bottom plate, an air inlet used for introducing liquid nitrogen is formed in the side wall of the die cushion, and a fluid channel used for communicating the air inlet with the air inlet end of each exhaust groove is formed in the die cushion. Through the innovative cooling structure design, rapid cooling and uniform temperature control of the mold are achieved, the service life of the mold is prolonged, and the quality of an extrusion forming part is improved.

The invention aims to provide a device and a method for preparing a fine-grain magnesium alloy pipe, and belongs to the technical field of light metal plastic forming. Differential torsion and continuous shear deformation are generated in the machining process of a magnesium alloy pipe blank, grain refinement and texture weakening are achieved while the torsion direction of the blank is not changed, and the yield of the fine-grain magnesium alloy pipe is improved. Room-temperature mechanical properties of magnesium alloy pipes are improved, and the magnesium alloy application range is widened. By means of the method, the grain refining effect of the magnesium alloy pipe is more remarkable, the basal texture is weakened to a large extent, the obtained fine-grain magnesium alloy pipe is uniform in structure, and the obdurability is greatly improved.

The invention discloses a multi-cavity aluminum alloy battery pack shell extrusion-bending process optimization method, and relates to the technical field of aluminum alloy machining. According to the method, 6000 series aluminum alloy serves as a base material, and the problems of cracking, resilience, section deformation and uneven performance of a profile in the traditional process are solved through the six-step core process of compound trace element regulation and control, gradient heating ingot casting, PID temperature control extrusion, segmented quenching temperature control, multi-roller cooperative bending and online structure monitoring. The strength and plasticity of the alloy are improved through Mn / Zr or Cu / Ag composite microalloying, extrusion-bending continuous forming and real-time grain boundary migration and dislocation density monitoring are combined, and the multi-cavity structure size precision (the broad side error is + / -1.87 mm, and the narrow side error is + / -0.40 mm) and the mechanical property (the tensile strength is larger than or equal to 200 MPa, and the percentage elongation after fracture is larger than or equal to 8%) both reach the standard. The process shortens the processing period by more than 30%, improves the material utilization rate to 92%, is suitable for large-scale mass production of new energy automobile battery pack shells, and provides key technical support for automobile lightweight.

A combined extrusion method for preparing high-performance grain-refined magnesium alloy comprises the following steps that a mold is cleaned, and a molybdenum disulfide solid lubricant is evenly sprayed to an extrusion channel to reduce friction force; the tightening mold is tightly wrapped with refractory cotton after being placed at a proper extrusion position of a workbench; induction heating plates are placed on the two sides of the mold, a thermocouple is placed in an extrusion channel for temperature measurement, and heat preservation is conducted for 30 min after heating is conducted to the experimental temperature; polishing the sample to remove an oxide layer, and then uniformly spraying a MoS2 solid lubricant; putting into a muffle furnace, heating to 300-350 DEG C along with the furnace, and preserving heat for 15 minutes; coordinating the heat preservation time of the sample and the mold; after the heat preservation time is finished, the heating and temperature measuring equipment is moved away, and the sample is put into an extrusion channel and extruded at the speed of 2-4 mm / s; after extrusion is finished, the sample and the mold are air-cooled together at the original position of a workbench; after cooling to room temperature, opening the mold and taking out the sample. The tensile strength, the ductility and the product of strength and elongation of the sample extruded by the method are 298.02 MPa, 23.42% and 6.98 GPa% respectively, and the performance of the magnesium alloy is greatly enhanced.

A method for preparing a shear-assisted extruded material from a powder billet is provided, the method comprising providing a billet of material in substantially powder form; applying both axial and rotational pressure to the material to deform at least some of the contacted material; and extruding the material to form an extruded material. A method for preparing shear-assisted extruded material is provided, the method comprising applying both axial and rotational pressure to stock material to form an extruded material at a rate between 2 and 13 m / min. A method for preparing shear-assisted extruded material is provided. The method comprises applying both axial and rotational pressure to stock material to form an extruded material; and aging the extruded material for less than 3 hours. A method for preparing shear-assisted extruded material is provided. The method comprises providing a stock material for shear-assisted extrusion; and applying both axial and rotational force to the stock material to form an extruded material, wherein the axial force does not decrease during the extrusion.

The application relates to a torsion extrusion device and method for enhancing torsion shear effect, which comprises an extrusion cylinder for arranging a blank to be extruded; a movable extrusion punch mounted in the extrusion cylinder and used for extruding the blank; and a multi-stage cavity rotary die connected with the extrusion cylinder and comprising a circular cross-section conical cavity, a first transition cavity, a wavy cross-section straight cavity, a second transition cavity and a circular cross-section straight cavity which are connected in sequence and integrally formed. Compared with the prior art, the application can solve the problem of slip in the torsion extrusion process and make the torsion deformation zone and the extrusion deformation zone of the material coincide, so as to enhance the torsion shear effect and realize good grain refinement effect.

A die structure for reducing metal extrusion welding lines is divided into a male die and a female die, the male die is provided with shunting bridges and a die core, the female die is provided with a welding cavity, the front face of the welding cavity is in a petal shape, the shunting bridges and the welding cavity are evenly distributed in a radial shape, and after the shunting bridges and the welding cavity are oppositely combined, a complete shunting welding structure is formed. According to the utility model, the structure of the mold runner is optimized, the defects of welding lines of the produced metal extrusion product are greatly reduced, the grain size of the product is smaller, and the product performance is more excellent.

The invention discloses a mesopore shaft multi-station warm forging forming process which comprises the steps of blanking, heating, forward extrusion, upsetting, reverse extrusion of a large inner hole and an end face diameter, reverse extrusion of a small inner hole and punching, through the process, the production efficiency can be effectively improved, and the service life of a reverse extrusion punch die can be effectively prolonged. The problem that the hollow motor shaft reversely extrudes a multi-step deep hole is solved, the machining allowance is reduced, and the machining and material cost is saved.