401results about "Heating/cooling devices" patented technology

The invention relates to the field of metal pressure machining, in particular to metal part machining cold heading forming equipment and a forming process thereof.The cold heading forming equipment comprises a cold heading machine body, a fixed die, a movable die, a supporting sleeve and an elastic film, and the fixed die and the movable die are arranged on the cold heading machine body in a face-to-face mode; the supporting sleeve is coaxially arranged at the end, close to the movable mold, of the fixed mold, the elastic film is coaxially arranged on the inner side of the supporting sleeve, the elastic film has elasticity and is in a tensioned conical barrel shape initially, the small end of the elastic film is connected with the fixed mold, and the large end of the elastic film is connected with the supporting sleeve so as to define an oil storage cavity with the supporting sleeve and the fixed mold. During forming, cooling lubricating oil in the oil storage cavity is extruded into the cavities of the fixed mold and the movable mold to provide lubricating cooling, after forming, the movable mold is far away from the fixed mold, negative pressure is formed between the movable mold and the fixed mold, and the cooling lubricating oil in the cavities is sucked out; extrusion lubrication and replacement of cooling lubricating oil can be completed once in each cold heading process, and the lubrication effect is improved.

The invention relates to the technical field of manufacturing of metal pressing parts, in particular to an efficient forging control method, equipment and system for a high-precision gear shaft, and solves the technical problem that in the prior art, due to the regional difference of material flow and stress distribution, the temperatures of different regions of a shaft body are not uniform in the forging process. The method comprises the steps that vibration time sequence data of the gear shaft in the forging process and temperature time sequence data of multiple positions are collected; according to the temperature time sequence data of the multiple positions, the temperature distribution confusion degree of the gear shaft at each moment is determined; according to the vibration time sequence data, the striking strength sequence of the gear shaft in the forging process is determined; according to the temperature distribution confusion degree and the time sequence change of the strike intensity sequence, the influence degree of strike at each moment on the temperature distribution confusion degree is determined; and according to the temperature distribution chaos degree and the influence degree of each moment, the temperature control coefficient of each moment is determined, and temperature control is conducted on the forging process according to the temperature control coefficients.

The invention discloses a forging method for regulating and controlling the structure uniformity of a TiAl alloy, and belongs to the technical field of TiAl alloy material processing. According to the method, a TiAl alloy ingot is coated with a soft sheath, X-Y-Z three-dimensional six-pass reversing forging is carried out, then the sheath is removed, long-time annealing is carried out, X-Y-Z three-dimensional six-pass reversing forging is carried out again, and a TiAl alloy forging stock with a fine and uniform equiaxed structure is obtained; according to the method, the first round of six-pass forging is conducted on the blank through the X-Y-Z three-dimensional multi-pass reversing forging technology, short-time annealing is conducted between the passes, through the mode of combining dynamic recrystallization and sub-dynamic recrystallization, evolution of a thick and large as-cast structure in a TiAl alloy ingot is promoted, a fine equiaxed structure is formed, the uniformity of the forging stock is improved, and the yield of the TiAl alloy ingot is increased. And the blank is subjected to long-time annealing treatment, growth and spheroidization of residual lamellar structures are achieved, second-round six-pass forging is conducted, the grown equiaxed structures are refined, it is ensured that the TiAl alloy forging stock has the fine and uniform equiaxed structures, and the mechanical property of the TiAl alloy forging is improved.

The invention discloses a manufacturing process of an NO7718 nickel base alloy nut for nuclear equipment. The manufacturing process comprises the steps of material preparation, hot forging, shot blasting, solid solution heat treatment, physical and chemical detection, finish machining, precipitation hardening heat treatment and detection packaging. The hot forging near-net forming technology is adopted, the shape of the nut blank is directly obtained through plastic deformation, the cutting allowance of machining is greatly reduced, a large number of raw materials are prevented from becoming sweeps, the material utilization rate is remarkably increased, and the raw material cost is effectively reduced; by accurately controlling the initial forging temperature, the final forging temperature and the cooling speed of hot forging as well as subsequent solution treatment and precipitation hardening treatment, grains can be refined, and the precipitation form and distribution of a strengthening phase can be controlled, so that the microstructure of the material is optimized, and the material obtains more excellent comprehensive mechanical properties such as higher strength, plasticity and toughness cooperation; and the harsh working condition requirements of nuclear equipment can be better met. The process provided by the invention ensures the stability and consistency of product performance.

The application belongs to the technical field of metal material preparation, and relates to a preparation method of small-specification titanium alloy pipe and application thereof. The titanium alloy blank is processed in a mode of "oblique rolling piercing, weekly rolling and precision forging", and then the preparation of the titanium alloy pipe is completed after heat treatment and finishing, so that the problems of low yield and high production cost of the titanium alloy pipe prepared by the existing method are solved, and the preparation of titanium alloy pipes of various grades such as TC4, TC11 and TA15 can be applicable. The titanium alloy is heat treated by improved heat treatment parameters, the proportion of crystal phase components in the titanium alloy is optimized, good microstructure is obtained, and finally high-strength small-specification titanium alloy seamless pipe is obtained.

The invention relates to the technical field of forging, in particular to a step-by-step vertical forging forming method for a GH4169 alloy low-pressure turbine shaft part. A forge piece is designed according to the shape of the turbine shaft; the forge piece comprises a rod part and a head part which are coaxially arranged, the rod part and the head part 2 are connected through a transition area, and the diameter of the head part is larger than that of the rod part. Initial bar specifications are determined according to the rod part and the head part, and blanking is conducted; drawing out and forming the rod part; locally heating the head; and vertically upsetting the head. According to the method, the step-by-step forming process of drawing out the rod part through one time of heating and upsetting the head part through two times of heating is adopted, so that the heating number is effectively controlled, the repeated heating times are reduced, the production efficiency is improved, the consistency of overall deformation of the forge piece can be kept, and the problems of coarse grains and uneven structures caused by multiple times of heating are solved.

The present application relates to gear processing forging equipment technical field, specifically a kind of temperature monitoring function's gear processing is forged device, and the forging device includes first forging machine, second forging machine, manipulator, test table, first forging machine is processed into intermediate body by hollow cylindrical raw material block, second forging machine is placed in first forging machine side, second forging machine is processed into gear-shaped forming body by intermediate body, test table is placed in second forging machine side, test table tests the tooth root toughness in the meshing process of forming body, manipulator is set between first forging machine, second forging machine, test table for transferring workpiece.Raw material block is heated to forging point using resistance heating mode, resistance heating electrode is set in first forging machine and second forging machine, first forging machine and second forging machine are with infrared probe to identify the temperature of raw material block and intermediate body in heating process.After obtaining intermediate body, the outer edge of heated intermediate body, so that the material that becomes tooth surface finally in second forging process is based on the material of original outer edge.

The application provides a large height-diameter ratio titanium-aluminum alloy blank manufacturing device and method. The method comprises the following steps: S10, designing a blank: designing a forging according to a target titanium-aluminum alloy blade; the forging comprises a blade root part, a blade body part and a blade crown part; presetting the shape and size of the blank according to the forging; S20, obtaining a forming die and a raw material: preparing the forming die according to the preset shape and size of the blank in step S10, and selecting a bar; S30, adopting the forming die to perform upsetting forming on the bar to obtain the blank; and performing hot working on the blank to obtain a target titanium-aluminum alloy blade forging. The large height-diameter ratio titanium-aluminum alloy blank manufacturing method and device can solve the problems of blank instability of a large height-diameter ratio metal bar and high mold cost caused by titanium-aluminum alloy isothermal forming, realize non-isothermal forming of a large height-diameter ratio titanium-aluminum alloy special-shaped part, improve material utilization, reduce waste of titanium-aluminum alloy material, and effectively reduce the machining cost of the blade.

This invention discloses a process for improving the hardenability of wind turbine main shafts during heat treatment, comprising the following steps: heating 42CrMo4 steel ingots to 1180~1220℃ for forging, with a forging ratio ≥4; air-cooling the forgings to 650~700℃ for the first time before loading them into a furnace, holding them at 300~350℃, then raising them to 640~660℃ for a second holding, with the holding time determined by the effective thickness × 1.5min / mm, followed by cooling to room temperature; vertically loading the forgings into tooling and heating them to 8... The surface is held at 40~860℃ for 1.2~1.5 min / mm (effective thickness × 1.2~1.5 min / mm) until the surface temperature drops to 780~800℃. Then, it is quenched in PAG solution within 3 minutes of quenching. After quenching, it is transferred to a tempering furnace and heated to 300℃ at a rate of ≤80℃ / h, held, and then heated to 540~580℃ at a rate of ≤100℃ / h, held for 2.0~2.5 min / mm (effective thickness × 2.0~2.5 min / mm). After tempering, it is cooled at a rate of ≤50℃ / h. This invention refines grains and carbides through forging and upsetting processes, controls pearlite cluster size through normalizing, and improves cooling uniformity through a density-layered dual-medium system during quenching. This method is suitable for improving the hardenability of large cross-sections in high-power wind turbine main shafts.

The invention discloses ultrahigh-hardness and high-purity stainless steel forging equipment and process, and relates to the field of stainless steel forging.The ultrahigh-hardness and high-purity stainless steel forging equipment comprises a heating furnace and a rotary supporting seat, a first roller conveying belt and a second roller conveying belt are installed on the two sides of the heating furnace correspondingly, and a first door assembly is installed on one side of the heating furnace; a second door assembly is mounted on the other side of the heating furnace; the top of the rotary supporting base is rotationally connected with a cooling station, a hydraulic lifting rod is installed in the center of the top of the rotary supporting base, and an electric chuck is installed at the other end of the hydraulic lifting rod. According to the ultrahigh-hardness high-purity stainless steel forging equipment and process, the temperature control and cooling process is optimized, and the final mechanical property of a product is ensured. The heating resistance wire is accurately controlled through the mechanical thermostat, the heating temperature is stabilized within the accurate range of 1000 + / -20 DEG C, the heat preservation time is set according to the thickness of a workpiece, and reliable guarantee is provided for the austenitizing process.

A method for controlling the structure uniformity of a large-size ultralow-expansion alloy bar comprises the following steps that (1) an ultralow-expansion alloy electroslag ingot with the diameter larger than that of the bar is heated to 1100-1130 DEG C, and heat preservation is conducted for 3-4 hours; (2) the heated electroslag ingot is subjected to multi-pass drawing-out and anvil forging rounding, and a cogging bar with the diameter being phi 330-phi 370 mm is obtained; (3) the surface of the cogging rod is subjected to sanding treatment, and then the cogging rod is fully coated with heat preservation paint; (4) the treated cogging rod is heated to 1050-1100 DEG C, and heat preservation is conducted for 2-3 hours; the upsetting ratio and the drawing-out ratio of the first time are controlled to be 1.3-1.6, the upsetting ratio of the second time is controlled to be 1.3-1.6, the drawing-out ratio is larger than 2.4, then rounding is conducted, a finished bar is obtained through water cooling, and (6) the radial thickness of the finished bar is removed by 10-20 mm through turning, and the finished large-specification ultralow-expansion alloy bar with the diameter being 230-250 mm is obtained.

The invention relates to the technical field of metal forging, in particular to a forging method of a PCrNi3Mo hollow integral forging type extrusion shaft. Comprising the steps that a demolded steel ingot is subjected to high-temperature homogenization treatment, and a to-be-forged part is obtained; the to-be-forged part is heated and then subjected to primary upsetting and drawing-out in sequence, and a first intermediate part is obtained; the first middleware is heated and then subjected to secondary upsetting and punching, and a second middleware is obtained; after the second middleware is heated, the second middleware is drawn out to the middle size through a first core rod, then the second middleware is drawn out to the finished product size from the middle size through a second core rod, and a finished product forge piece is obtained; the diameter of the second core rod is smaller than that of the first core rod, and the diameter of the second core rod is smaller than that of an inner hole of the second middle piece. The problems that in the whole-section forging process of the extrusion shaft, the forging ratio of a flange area is insufficient, and deformation is difficult can be solved.

The invention discloses a preparation method of a bamboo-imitating modulation structure metal composite board, and belongs to the technical field of composite material preparation, and the method comprises the following steps: by taking one or more metal boards with adjustable hardness difference as raw materials, sequentially overlapping at least three layers according to design requirements through explosive welding, carrying out heat treatment according to requirements to regulate and control the hardness difference of each layer, and carrying out heat treatment to obtain the bamboo-imitating modulation structure metal composite board. Cold deformation or thermal deformation is conducted firstly, then heat treatment is conducted, the layer thickness and proportion and element, structure and hardness distribution characteristics of all layers are regulated and controlled, and the bamboo-imitating modulation structure metal composite plate is obtained. The main heterogeneous characteristics of the composite material prepared by the method imitate a staggered structure formed by hard thick-walled cells and soft parenchyma cells in bamboos, postweld treatment can be performed according to the thickness and the proportion of the thickness required by structure property coupling enhancement so as to perform controllable adjustment, and meanwhile, the heterogeneous characteristics such as components and structures can be designed; and higher-level strength and plasticity synergy can be realized.

This invention relates to the field of metal plastic forming technology, specifically disclosing an online monitoring method for the forging process of automotive variable cross-section transmission parts. The method includes: collecting historical forging data from the production line and identifying defective batches; predicting the folding tendency of the current batch based on time-series analysis; conducting flow rate difference-folding correlation analysis on high-risk batches to determine the main detection areas; determining whether a first-level folding warning is triggered after threshold comparison; if triggered, simultaneously collecting forging temperature, establishing a linear folding coupling formula, constructing a linear folding deep learning model, generating the current theoretical flow rate difference, and making a second-level folding warning trigger decision; if triggered, analyzing the correlation between temperature and flow rate, constructing an adaptation model to assess the feasibility of temperature adjustment, and executing temperature control or manual intervention as needed. This method achieves predictive identification of linear folding defects, hierarchical and accurate early warning, and efficient targeted intervention, effectively avoiding batch defects and significantly reducing scrap rate and production losses.

The utility model discloses a finished product collecting device for a nut cold header, and particularly relates to the technical field of cold headers, the finished product collecting device comprises a cold header main body and a collecting mechanism, the collecting mechanism is positioned at a blanking port of the cold header main body, and a linkage mechanism and a sound production mechanism are arranged above the collecting mechanism. Through cooperation of the collecting mechanism, the linkage mechanism and the sound production mechanism, when nuts are stacked on the bearing plate and approach the bottom face of the linkage plate, the bearing plate moves up and down to drive the linkage plate to act synchronously, the piston is promoted to reciprocate, the pneumatic cylinder body continuously injects air into the air inlet end, and airflow is sprayed out of the air spraying hole through the concentration pipe; the impact metal disc generates vibration and sound to prompt that the main collecting box is full, a touch device and a buzzer are not needed, cost is reduced, meanwhile, in the linkage process, the guiding abutting block pushes the nuts below to the side guiding hopper, the nuts are collected into the auxiliary collecting box through the side guiding hopper, continuous production of the cold header is guaranteed, continuous reminding of the pneumatic sound production assembly is guaranteed, and production efficiency is improved.

The utility model discloses a heating and heat preservation device of an aluminum alloy isothermal forging die, which comprises a lower die block and an upper die block arranged at the top of the lower die block, an upper die heat insulation base plate for insulating heat of the upper die block is arranged at the top of the upper die block, and a heat insulation plate for insulating heat of the lower die block is arranged at the bottom of the lower die block. In order to improve the heat balance speed and efficiency, high-thermal-conductivity die steel is selectively adopted to manufacture the upper die and the lower die of the cavity, in order to reduce the invalid heat energy consumption of an isothermal die and block or reduce the heat energy loss path, a heat insulation material is adopted to wrap a coil and the die on the outer layer of the die, and the contact and heat exchange between the outer surface of the die and air are reduced; under the condition that the necessary temperature of isothermal forging is guaranteed, the input energy of induction heating is reduced, the production cost is reduced, high-thermal-conductivity die steel is adopted between an induction heating coil and a module or a combined module of the die, and the heat balance speed and efficiency of the module are improved.

The present application relates to screw processing technical field, especially to a kind of green anticorrosion environmental protection screw for marine environment and processing equipment, including collection barrel, the upper side of the collection barrel is equipped with head beating component, the screw body is placed in the head beating component, the bottom end of the collection barrel is inserted with the ring block of insertion, the bottom end of the collection barrel is away from the end of ring block insertion and is equipped with liquid delivery groove hole, the liquid delivery groove hole is connected with the inner chamber of collection barrel, another end of the liquid delivery groove hole is connected with cooling water spray head.This application provides a kind of green anticorrosion environmental protection screw for marine environment and processing equipment, for marine environment special anticorrosion screw point, with "fluid self-driving" as core, simultaneously realized the green of cooling circulation, the self-cleaning automation of production process, the long-acting stabilization of equipment operation, while reducing cost and increasing efficiency, improve the processing quality of marine anticorrosion screw.

The invention relates to a high-strength alloy steel rotor shaft forge piece and a manufacturing method. The high-strength alloy steel rotor shaft forge piece comprises, by mass, 0.3% of C, 0.057% of Si, 0.587% of Mn, 1.207% of Cr, 1.06% of Mo, 0.576% of Ni, 0.2610% of V, 0.0029% of P, 0.0011% of S and the balance iron. Or 0.3% of C, 0.059% of Si, 0.591% of Mn, 1.208% of Cr, 1.06% of Mo, 0.574% of Ni, 0.2727% of V, 0.0026% of P, 0.0010% of S and the balance of iron. The steel has the advantages of high temperature resistance, fatigue resistance, good corrosion resistance, high strength, high toughness and excellent hardenability.

The invention belongs to the field of forging hot working, and particularly relates to a forging method of a large-size GH3625 alloy annular forge piece. Comprising the steps that firstly, a high-temperature alloy bar is put into an electric furnace for heating and heat preservation; the press-down speed is required to be 10-15 mm / s and the deformation is required to be 45%-65% in the cake upsetting and punching process; 2, the rough mold is coated with a heat preservation coating; thirdly, the blank is heated and subjected to heat preservation, the blank is expanded to the preset size after heat preservation, a forge piece is obtained, and the final reaming deformation is not larger than 15%-25%; and fifthly, the forge piece is subjected to solution heat treatment, the heat preservation time is 60 min, and air cooling is conducted.

The invention relates to the technical field of cold heading machines, and discloses a cold heading machine for cold heading part machining, which comprises a mounting frame, a main transmission assembly, a lathe bed, a flywheel shaft seat, an upset head sliding block, a multi-station die seat, a feeding mechanism and a shearing mechanism, a power mechanism is arranged on one side of the interior of the mounting frame, and the power mechanism is used for providing power; a power mechanism is arranged at the bottom end of the mounting frame, a gas circuit switching mechanism is arranged at one end of the power mechanism and used for controlling connection and disconnection of a gas circuit, an internal environment treatment mechanism is arranged at the bottom end of the interior of the mounting frame and used for protecting equipment, and the bottom of the lathe bed is fixedly connected to the bottom end of the interior of the mounting frame. Through linkage cooperation of the main power mechanism, the gas circuit switching mechanism and the internal environment treatment mechanism, the internal environment of the shell is purified, the structure of the cold header can be prevented from being damaged by impurities, machined parts can be prevented from being damaged by the impurities, the service life of the cold header is prolonged, and the quality of the machined parts is improved.

The utility model provides a cooling device for a cold header, and relates to the technical field of cold header machining, the cooling device comprises a cold water pool, and a feeding assembly and a discharging assembly are arranged on the two sides of the upper end of the cold water pool correspondingly; the feeding assembly comprises a supporting frame, a roller conveying belt driven by a motor is movably installed in the middle of the inner side of the supporting frame, a spraying assembly is arranged in the middle of the upper end of the roller conveying belt and comprises multiple sets of spraying pipes, and multiple sets of spraying heads are arranged at the bottoms of the multiple sets of spraying pipes; the discharging assembly comprises a net chain conveying belt, the net chain conveying belt is obliquely installed, the right end of the net chain conveying belt is arranged at the right end of the inner side of the cold water pool and located at the bottom end of the roller conveying belt, and the left end of the net chain conveying belt stretches out towards the outer side of the cold water pool. According to the cooling device, all-around uniform cooling can be carried out on a cold forging product, and stage type cooling is carried out on the cold forging product, so that the forming quality of the cold forging product is effectively improved.

The invention relates to the field of forging dies, in particular to an aluminum alloy high-temperature forging die which comprises a column body, a first main die base and a second main die base are arranged on the outer side of the column body in a sliding fit mode, and the first main die base and the second main die base are both driven by external hydraulic equipment and move up and down along the column body; a connecting piece is arranged at the bottom of the first main die base, and a forging die cavity is fixedly formed in the bottom of the connecting piece. The heat insulation mechanism is arranged in the center of the bottom of the first main die holder and used for isolating heat generated by high-temperature forging from the first main die holder; according to the die for aluminum alloy high-temperature forging, double protection is formed through the heat insulation mechanism, high-temperature transfer is blocked through the heat insulation table made of a high-temperature-resistant ceramic material, a cooling medium circularly flows in the pipeline to take away heat, and deformation of the main die base due to overheating is effectively avoided.

The invention discloses a small-aperture thick-wall metal tube and a preparation method thereof. The cross-sectional diameter of the metal tube ranges from 30mm to 160mm, the dimensional accuracy is ±0.2mm, and the ratio of the outer diameter of the metal tube to the wall thickness of the metal tube is greater than 2 to less than or equal to 20. The inner wall and outer wall of the metal tube are free of peeling, dents, or cracks. The metal tube is made of steel, copper, aluminum, magnesium, titanium, or alloy. The invention has the characteristics of forging and rolling, can realize single pass and large deformation amount processing of the metal tube blank, and has the advantages of short process flow, high product dimensional accuracy (±0.2mm), good quality of the inner wall and outer wall surface, and low cost.

The invention discloses a hot forging and composite cold extrusion forming process for a thin combined tooth ring. The hot forging and composite cold extrusion forming process comprises the following steps: feeding a pipe material; the pipe material is heated and upset into an annular blank; punching an assembly hole; the punched annular blank is subjected to precision forging, and a gear ring forming part is formed; performing radial extrusion on the gear ring forming part by adopting a combined extrusion die, so that each straight tooth on the gear ring is extruded to form an inverted conical tooth; and turning off excess materials of the radially extruded molded part according to design requirements. The pressing male die used for being matched with the upper end of the gear ring forming part in an abutting mode is elastically installed on the upper die of the combined extrusion die, the pressing male die can be always in abutting fit with the upper end of the gear ring forming part in the extrusion process, the gear ring forming part is positioned, the tooth profile extrusion stability is effectively guaranteed, and the product forming rate is increased.

The utility model provides a kind of switch cover plate three station forging die, including support plate, spraying device, second telescopic motor and hollow strip, support plate upper and lower two sides symmetrically install cover plate, spraying device is equipped with two, second telescopic motor rear end is connected with square plate, hollow strip is slidably installed with connecting strip, the middle of support plate is provided with hollow slot, two spraying devices are symmetrically installed on the upper and lower sides of hollow slot, support plate rear side is installed with connecting plate, the design solves the original device in the use process will accumulate dirt, not only affect the appearance may also affect processing effect, and mold will produce heat in the processing process, if not cooling can scald staff's problem, the utility model structure is reasonable, and practicality is good, by installing cleaning mechanism and spraying device can clean or cooling device, improve the neatness and durability of device, improve processing effect and device life, suitable for use widely.

The application discloses a bolt cold upsetting forming device, which comprises a cutting station, a first punching station, a second punching station and a third punching station, and an equipment box is arranged between the cutting station and the first punching station. The bolt wire material after cutting can be polished and deburred at both ends by the polishing cylinder, the both ends of the rod material are polished, the cutting burrs are avoided from being brought into the mold, the problems of being stuck and punched are avoided, the forming efficiency of the bolt cold upsetting is improved, the mold is protected, the service life of the mold is prolonged, the stability and efficiency of production are improved, meanwhile, the compressed cold gas in the compressed cold gas storage tank is sprayed out, passes through the gas conveying pipe, the pressure rubber pipe, the connecting pipe and the main pipe and is sprayed out from the airflow channel, the burr and the debris generated after polishing are blown out by the high-speed airflow, automatic cleaning is completed, meanwhile, the cold gas also plays a role in cooling the abrasive, the problem of continuous polishing overheating damage of the abrasive is avoided, automatic cooling is completed, and the convenience of use is improved.

The invention relates to the technical field of automobile hub forging, in particular to a positioning structure and method for a middle split-die hub, the positioning structure comprises a trimming die and a finish forging die which are used for forming the hub, a positioning boss is arranged in a trimming area of the finish forging die, a V-shaped positioning groove is formed in the corresponding position of the trimming die, and the V-shaped positioning groove is matched with the positioning boss. At least four V-shaped positioning grooves are formed in the trimming die, the length of the straight edge of each V-shaped positioning groove is not smaller than 4 mm, and a discharging gap is formed between the positioning boss on the finish forging die and the V-shaped positioning grooves in the trimming die. The flash positioning structure is arranged on the periphery of the trimming die body, a product is effectively prevented from rotating around the axis, meanwhile, the positioning boss and the V-shaped positioning groove between the finish forging die and the trimming die are arranged, an avoiding discharging gap is formed, it is guaranteed that a hot forging piece does not shake in the trimming die, positioning is accurate, trimming consistency can be greatly improved, the defects of over-cutting, convex edges, burrs and the like are overcome, and the product quality is improved. And accurate and stable trimming positioning is integrally realized.

The invention provides a manufacturing and performance verification method of a spray-formed aluminum alloy forge piece for a helicopter, and the method comprises the following steps: carrying out spray forming on uniformly mixed metal powder to obtain a spray-formed aluminum alloy ingot blank; carrying out extrusion hot processing on the spray-formed aluminum alloy ingot blank; forging the ingot blank subjected to extrusion hot processing; the forged forge piece is subjected to heat treatment; and carrying out performance verification on the forged piece subjected to heat treatment. The spray-formed aluminum alloy forge piece manufactured based on the method can meet the weight reduction design requirements of typical bearing frames and other parts of helicopters, structural weight reduction is achieved, and the development requirements of ultra-light structures and high specific strength are met.

The invention discloses a production method of an ultra-supercritical unit F91 forged three-way forge piece, which sequentially comprises the steps of heating before forging, forging, annealing, rough turning, normalizing and tempering, the forge piece is made of martensite heat-resistant alloy steel with the model of ASTMA182F91, and the forge piece comprises the following components in percentage by mass: 20-30% of martensite heat-resistant alloy steel with the model of ASTMA182F91; the martensite heat-resistant alloy steel is prepared from 0.08%-0.12% of C, 0.2%-0.5% of Si, 0.3%-0.6% of Mn, smaller than or equal to 0.015% of P, smaller than or equal to 0.005% of S, smaller than or equal to 0.4% of Ni, 8%-9.5% of Cr, 0.06%-0.08% of Nb, smaller than or equal to 0.3% of Cu, 0.85%-1.05% of Mo, smaller than or equal to 0.02% of Al, smaller than or equal to 0.01% of Ti, 0.055%-0.068% of N, 0.18%-0.22% of V, smaller than or equal to 0.01% of Zr and the balance Fe and inevitable impurities. And the mass of the raw material piece heated before forging is 15-30 t. By setting the content of the N element to be higher and limiting the mass ratio of the N element to the Al element, the mechanical property of the forged piece at the high temperature is improved. The forging is air-cooled to a proper temperature and then is tempered, so that the production time is shortened under the condition that the high-temperature performance of the forging is basically unchanged.

The utility model relates to forging and pressing equipment for a gear forging line. The forging and pressing equipment comprises a before-forging and pressing conveying belt, a before-upsetting mechanical arm, a forging press for upsetting, a before-preforming mechanical arm, a forging press for preforming, a before-finish-forging mechanical arm, a forging press for finish-forging, a after-finish-forging mechanical arm and a after-forging and pressing conveying belt. The before-forging-and-pressing conveying belt is used for inputting short cylindrical blanks, the before-upsetting mechanical arm is used for transferring the short cylindrical blanks on the before-forging-and-pressing conveying belt into the forging press for upsetting for upsetting, and the before-preforming mechanical arm is used for transferring the blanks subjected to upsetting into the forging press for preforming for preforming. The pre-finish-forging mechanical arm is used for transferring a preformed blank to the forging press for finish forging, the post-finish-forging mechanical arm is used for transferring a product subjected to finish forging forming to the post-forging conveying belt, and the post-forging conveying belt is used for outputting the product; the device has the advantages that the mechanical arms are arranged among the working procedures to replace part of manpower, so that the labor intensity is reduced, and the harm of occupational diseases such as high temperature, noise and dust is reduced.