712results about "Heating/cooling devices" patented technology

The invention provides a high-temperature alloy forging process which comprises the following steps: S1, taking an alloy cast ingot smelted by a smelting process, and cutting the alloy cast ingot to a required size to obtain an alloy blank, S2, removing defects such as oxide skin and slag inclusion on the surface of the cast ingot through a turning machine tool, S3, slowly heating to 400-600 DEG C through a heating device, and carrying out heat treatment on the cast ingot to obtain the high-temperature alloy. After the temperature is increased to 600-900 DEG C through acceleration, the temperature is increased to 1000 DEG C and kept for 2 hours, and then the temperature is increased to 1150 DEG C and kept for 1 hour. According to the forging process of the high-temperature alloy, when an alloy blank is heated by a heating device, the temperature is slowly increased to 400-600 DEG C, so that a cast ingot is prevented from cracking due to thermal stress, the temperature is increased to 600-900 DEG C in an accelerated mode, the heat preservation time is shortened, surface oxidation is reduced, the temperature is increased to 1000 DEG C and preserved for 2 hours, then the temperature is increased to 1150 DEG C and preserved for 1 hour, and the high-temperature alloy is obtained. Therefore, stress concentration caused by large temperature difference between the surface and the core of the workpiece during forging is prevented.

The invention discloses an automatic forging production line and a production method thereof, the automatic forging production line is used for forging production of small-size ring forgings, the production line comprises a raw material discharging area, a forging area and a finished product storage area which are arranged in sequence, and the raw material discharging area conveys raw materials subjected to cutting and / or chamfering treatment to the forging area for forging through a raw material conveying line; the forging area conveys finished products in the forging area to the finished product storage area through a finished product conveying line. The forging area comprises a first forging assembly used for completing forging forming of raw materials, the first forging assembly comprises a first multi-station heating furnace, ring piece forging equipment, an edge trimmer and a first marking machine, and manipulators are arranged on the side faces of different equipment of the first forging assembly and used for loading and taking materials or moving the materials. The equipment is reasonably arranged in combination with a product production process, so that automatic production of ring forging products is realized, the manufacturing efficiency is improved, the personnel cost can be reduced, the number of on-site practical operation personnel is reduced, the potential safety hazard is reduced, and meanwhile, the processing quality consistency is improved.

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 discloses an intelligent production system for ring forgings. The intelligent production system comprises a raw material three-dimensional warehouse used for warehousing / ex-warehousing raw materials and storing warehousing and ex-warehousing information, inventory information, manufacturers, production batches and identification codes of the raw materials; the automatic discharging mechanism is used for cutting and / or chamfering the raw materials; the automatic forging mechanism is used for heating and forging raw materials and is provided with various ring forging rolling devices; the heat treatment mechanism is used for carrying out heat treatment on the forged ring forgings; the automatic detection mechanism is used for detecting the quality of the ring forgings; the finished product three-dimensional warehouse is used for warehousing / ex-warehousing the formed ring forgings; the control system is used for monitoring the production process of the ring forgings, and the control system is in communication connection with other devices of the production system. According to the production system, full-process full-link tracing can be achieved, automatic high-quality production of the annular forgings is achieved, the production efficiency is improved, and the yield of the annular forgings is increased.

The invention belongs to the technical field of titanium alloy material processing, and particularly relates to a preparation method of a titanium alloy bar with high crystal orientation uniformity. Comprising the following steps that S1, one-upsetting and one-drawing cogging is conducted in a single-phase area, and remelting and heat preservation are conducted after forging; s2, one-upsetting and one-drawing forging is carried out on the two-phase region, and after upsetting, temperature compensation and drawing-out are carried out; s3, single-phase region heat preservation, and stage cooling after heat preservation; s4, multi-heating-number two-upsetting and two-drawing forging is conducted on the two-phase region, and reversing drawing-out is conducted after upsetting; s5, upsetting and drawing out the two-phase region; s6, drawing out a two-phase region; and S7, forming a two-phase region. The TC11 titanium alloy bar prepared through the process is good in structure and crystal orientation uniformity and has good mechanical performance after heat treatment, the difference of the mechanical performance of all areas is small, and the TC11 titanium alloy bar can be applied to aerospace high-end parts with strict requirements for the alloy structure and performance.

The invention discloses a method for producing a TA19 large-specification titanium alloy bar with a uniform structure, the production process route is as follows: single-phase region forging, 'low-high 'forging, two-phase region upsetting and drawing forging and two-phase region drawing forging, the diameter of the bar finished product prepared by the method is 200-500mm, the structure uniformity is excellent, the comprehensive mechanical property is excellent, and the production cost is low. The method is suitable for industrial production.

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 provides a gear multi-station hot die forging press capable of rapidly replacing dies, and relates to the technical field of gear machining, the gear multi-station hot die forging press comprises a fixing frame body, and a fixing base is installed at the bottom of the fixing frame body; a spring is installed at the bottom of the guide supporting plate, the side end of the spring is connected with the bottom of the fixing plate, and an open groove is formed in the top of the guide supporting plate. A driving cylinder is mounted at one end of the bottom of the fixing frame body, and a force application guide rod is mounted at the output end of the driving cylinder and penetrates through an open groove in the top of the guide supporting plate; and the force application guide rod is mounted on one side of the bottom of the mold fixing seat in a sliding manner. The guide rod moves upwards to push the mold fixing seat to drive the multi-process mold to move outwards, and the multi-process mold is separated from the clamping plate and falls on the guide supporting plate by utilizing the self weight, so that quick demolding is realized, the replacement efficiency of the multi-process mold is improved, and the problems that the mold is heated to swell due to high temperature of a gear blank, and the mold cannot be directly taken out upwards are solved. The operation process is time-consuming and labor-consuming.

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 utility model discloses a special forging clamp for a forging machine, and particularly relates to the technical field of forging clamps, which comprises a rectangular frame, a clamping plate or a clamping ring can be selected according to the shape of a workpiece, a proper clamping tool can enable the workpiece to be uniformly distributed when the workpiece is stressed, the deformation caused by uneven local stress is avoided, the machining quality is ensured, and in the machining process, the machining efficiency is improved. Cooling liquid enters the liquid inlet pipe through the cooling device, flows into the connecting pipe in the clamping plate, then passes through the Z-shaped pipe, finally reaches the semi-annular pipe and finally flows into the cooling device through the second liquid outlet hose, heat generated by a workpiece in the machining process is conveniently taken away through the cooling liquid flowing circularly, the workpiece is effectively cooled, smooth proceeding of the machining process is guaranteed, and the machining efficiency is improved. And meanwhile, the performance and quality of a workpiece can be maintained, the service life of a machining tool and the service life of a clamp are prolonged, the first liquid inlet hose and the second liquid outlet hose are bent and have extensibility, the first liquid inlet hose and the second liquid outlet hose can conveniently move front and back along with the sliding block, and snapping during stretching is prevented.

The invention provides a preparation method of a high-uniformity GH4169 high-temperature alloy bar. According to the preparation method, the high-uniformity GH4169 alloy bar is prepared by adopting a high-uniformity annealing and free forging technology; the method comprises the following steps: firstly, carrying out 2-3 heating number axial upsetting and drawing cogging forging and 2-3 heating number radial upsetting and drawing forging on a GH4169 alloy, and then carrying out high-uniformity annealing heat treatment; after heat treatment, the blank is subjected to 2-3 heating number radial upsetting and drawing forging, and then secondary high-uniformity annealing heat treatment is carried out; after the secondary heat treatment, the blank is subjected to twice radial forging of 2-3 heating numbers, and air cooling is carried out after the forging is completed; and finally, the blank is subjected to 2-3 heating number drawing forming after being subjected to heat preservation at the temperature of 980-1010 DEG C, and air cooling is conducted after forging is completed. Compared with the prior art, the structure uniformity of the large bar billet is further improved, the mechanical property of the alloy is improved, the performance consistency in different directions at room temperature / high temperature is improved, and the complex force bearing condition of the high-temperature alloy material for the aero-engine can be met; the method has the advantages of simple process, low production cost and high material utilization rate.

The invention discloses a dimensional precision and surface quality control method in a TC4 titanium alloy superplastic forming process, which is characterized by comprising the following steps of: performing two-phase region forming forging on a TC4 titanium alloy cast ingot after a high-low high upsetting and drawing process to obtain a blank; the blank is subjected to isothermal forging forming, the height of the blank is monitored in real time, the deformation stage is judged to be the mold filling stage, the compaction stage and the shaping stage according to the height of the blank, the hot initial forging condition is adopted in the mold filling stage, the hot intermediate forging condition is adopted in the compaction stage, the hot forming forging condition is adopted in the shaping stage, and finally a forge piece is obtained; and the forge piece is subjected to solution treatment and aging heat treatment. According to the method, the change of the monitored height is combined with the real-time adjustment of forging process parameters, so that the anisotropy in a microstructure is minimum, crystal grains are finest and uniform, the comprehensive performance is optimal, and meanwhile, the precision control and the surface quality improvement are achieved.

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 invention relates to the technical field of heating control of warm upsetting machines, in particular to a heating system of a warm upsetting machine, which comprises a data acquisition module for acquiring data and a heating control module, and the heating control module is used for determining whether an initial heating process of a blank is qualified or not based on a consistency characterization value, the heating process monitoring unit is used for adjusting the opening angle of the shielding plate according to the deformation range and optimizing the angle adjusting coefficient based on the expansion rate; the overlapping area temperature monitoring unit is used for determining whether the temperature distribution of the blank transition area is qualified or not based on the smoothness under the condition that the initial heating process is determined to be qualified so as to adjust the output power of the corresponding coil; and the overall temperature monitoring unit is used for determining the overall temperature distribution of the blank based on the uniformity characterization values of the roughness so as to adjust the preset characterization value under the condition that the overall temperature distribution of the blank is determined to be unqualified. According to the invention, the temperature distribution uniformity of the blank is improved when the blank is heated by using the warm heading machine.

The invention discloses a forging and quenching integrated forming process for an aluminum alloy die forging, and relates to the technical field of aluminum alloy machining, the forging and quenching integrated forming process integrates independent forging heating and quenching heating links into single gradient preheating and die real-time temperature control through the forging and quenching integrated forming technology, and energy waste caused by secondary heating after forging is thoroughly abandoned. In the step S100, the solid solution temperature interval of 500-520 DEG C of a blank core is controlled through induction heating, the temperature of the surface layer is lower than that of the core to form a thermal gradient, high plasticity of core metal is guaranteed, surface layer oxidation loss is reduced, in the step S300, the cooling rate is accurately controlled through the 120-300 DEG C temperature difference design of an upper die and a lower die of a die and the adhesion characteristic of a forge piece in the demolding process, and the temperature difference of the upper die and the lower die of the die is reduced. Demolding damage and subsequent correction procedures caused by mold sticking are avoided, a top-speed quenching transfer technology smaller than or equal to 5 s in the step S400 is matched, the economical efficiency of large-scale production is remarkably improved, and the method is particularly suitable for large-scale mass production scenes.

The invention discloses a manufacturing method of a partition piece, which comprises the following steps of: 1, selecting proper raw materials for blanking to obtain a blank; secondly, the blank is heated to the forging temperature; 3, pre-forging operation is conducted on the blank to form a pre-forged piece, finish forging operation is conducted on the pre-forged piece to form a finish-forged piece, die preheating is conducted before forging, and lubricating liquid is sprayed; fourthly, the forged final forging is subjected to solution treatment; 5, trimming of the final forging is cut off; 6, aging treatment is carried out; and step 7, carrying out post-treatment. According to the forging method, operation is easy, the manufacturing process is stable and reliable, the blank is subjected to two times of forging including pre-forging and finish forging, filling is complete during forging, the deformation quantity is small, and the forged partition piece is excellent in physical performance.

The invention relates to the field of hub bearing machining, and discloses a hub bearing production process which comprises three stages: hot forging forming, residual temperature control cooling and structure stabilization stage, hot forging forming comprises upsetting, pre-forging, finish forging and rapid cooling, finish forging adopts a finish forging die for machining, an infrared thermometer is mounted on the finish forging die for monitoring, and the infrared thermometer is mounted on the finish forging die for cooling. During finish forging, the temperature fluctuation of the forge piece is controlled to be smaller than or equal to + / -15 DEG C, and the finish forging temperature is controlled to be 950-1050 DEG C; and the time interval from finish forging to rapid cooling starting should be smaller than or equal to 30 s. An infrared thermometer is adopted for monitoring the finish forging temperature, the fluctuation is controlled to be smaller than or equal to + / -15 DEG C, the temperature is maintained to be 950-1050 DEG C, it is ensured that the forge piece is located in an ideal thermal deformation interval, overheating or overburning or insufficient mold filling is avoided, and fine and uniform austenite grains are obtained; and the starting interval from finish forging to rapid cooling is smaller than or equal to 30 s, temperature drop fluctuation is reduced, cooling continuity is guaranteed, and structure coarsening is prevented.

The utility model relates to the technical field of flange forging, and discloses a flange forging device capable of rapidly cooling, which comprises an operation table, a motor is started to enable a driving gear to rotate, a rotating sleeve and a driven gear are driven to synchronously rotate through transmission, and then an arc-shaped clamping plate can rotate around a flange. When the flange rotates around the flange, the arc-shaped clamping plate does not clamp the flange, the situation that the flange and the arc-shaped clamping plate rotate at different speeds is formed, and then the outer wall of the flange can make contact with water liquid to be cooled, and when the arc-shaped clamping plate rotates around the flange, an arc-shaped pressing block on a well-arranged hydraulic rod can periodically extrude a pressed plate; and then the elastic telescopic plate drives the slope block to move forwards through transmission, so that the flange is slightly jacked up, the bottom end of the flange can make full contact with water flowing on the hollowed-out plate, it is guaranteed that the water at the bottom end of the flange can be well fluctuated while the side wall of the flange is effectively cooled, and the overall cooling effect is improved.

The application provides a processing method of an IN718 axial flow blade, uses incomplete recrystallization forging technology, makes the blade forgings without longitudinal low-magnification "bright strip", obtains more homogenized grain structure, improves the forging quality and production efficiency, the incomplete recrystallization forging technology is adopted, the blank temperature is controlled in a certain range through process parameters such as blank structure, equivalent strain and deformation rate in the die forging process, the blank temperature drop can be effectively reduced, meanwhile, the grain structure can be effectively refined under a small deformation amount, and the longitudinal low-magnification "bright strip" of the forged forgings after final forging is eliminated.

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 invention provides an energy-saving production line and method integrating steel ingot red-feeding forging and heat treatment, and belongs to the technical field of steel ingot forging. Comprising a steelmaking area, a forging area and a heat treatment area, a smelting furnace machine used for smelting molten iron and a plurality of steel ingot molds used for pouring forged and pressed sample pieces are arranged in the steelmaking area, and a conveyor used for transporting the steel ingot molds for molten iron pouring and a plurality of transport vehicles used for transporting the steel ingot molds are arranged on the outer side of the smelting furnace machine; the discharging end of the conveyor is provided with a first transferring mechanism used for transferring the steel ingot molds on the conveyor to the transport cart. A plurality of groups of mold opening mechanisms for performing red demolding on steel ingot molds on the transport vehicle, a forging heating furnace for heating forged and pressed sample pieces and a forging oil press for forging and pressed sample pieces are arranged in the forging area, and a second transfer mechanism for transferring the forged and pressed sample pieces is further arranged on the outer side of the mold opening mechanism; and a plurality of heat treatment furnaces for normalizing are arranged in the heat treatment area. And the effect of saving resources is achieved.

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.

The invention discloses a tapered roller bearing ring forging tool, and relates to the technical field of forging tools, the tapered roller bearing ring forging tool comprises a forging platform, the forging platform is arranged below a stamping mechanism, an auxiliary auxiliary tool mechanism is arranged on the inner side of the forging platform, the auxiliary auxiliary tool mechanism is placed on the ground, and the lower end of the forging platform is fixed to the ground; a main auxiliary tool mechanism is arranged on one side of the forging platform, the lower end of the main auxiliary tool mechanism is driven through a driving mechanism, and a cooling mechanism is installed on the other side of the main auxiliary tool mechanism. The bearing ring forging device has the beneficial effects that the main auxiliary tool mechanism is used for loading necessary auxiliary devices needed in the bearing ring forging process, operators are reduced, and the bearing ring forging speed and efficiency cannot be greatly reduced; on the premise that a conventional bearing ring forging process is not changed, the forging process of the bearing ring is greatly optimized, meanwhile, in the forging process, an auxiliary tool used in the forging process can be cooled, and the service life of the die is prolonged.

The present application relates to the field of diesel engine piston forging, in particular to a diesel engine piston material, a diesel engine piston and a preparation method and a forging die thereof. The diesel engine piston material provided by the present application comprises the following components: Si: 14.1-18.3 wt%; Ni: 1.6-3.2 wt%; Fe: 0.8-1.6 wt%; Mg: 0.3-0.6 wt%; Cr: 0.01-0.05 wt%; Zn: 0.06-0.3 wt%; Ti: 0.02-0.2 wt%; Zr: 0.07-0.2 wt%; V: 0.1-0.18 wt%; Al: balance. The piston material is applied to piston preparation, the layered temperature of the forging part is maintained during the forging process, the deformation and forming performance of the piston material is improved, the linear expansion coefficient is reduced, the volume stability is improved, the thermal deformation amount is reduced, and the service life of the piston is improved.

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 gear machining, in particular to an intelligent chambering device and method for gear forging, which comprises a machine base and a pressure head capable of chambering a gear workpiece, and further comprises a movable bracket arranged above the machine base and used for supporting the gear workpiece, an inclined frame matched with a gear workpiece tooth groove is arranged at the top of the movable bracket, one end of the inclined frame is fixedly connected with a plurality of extending cylinders capable of extending into the gear workpiece tooth groove, an oil tank storing silicone oil is arranged in the inclined frame, and the oil tank communicates with the extending cylinders through conveying cylinders. The outer surface of the extending cylinder is provided with a flexible piece which can stretch to abut against a tooth groove of the gear workpiece, a driving assembly for driving the flexible piece to stretch is arranged in the conveying cylinder, and one side of the inclined frame is provided with a stretching assembly for pushing silicone oil to circulate and providing power for the driving assembly. The flexible piece can stretch in a self-adaptive mode and abut against the inner wall of a gear tooth groove to absorb machining vibration.