104 results about "Radial forging" patented technology

The invention relates to the technical field of metal plastic forming, and discloses a titanium alloy radial forging reduction rate collaborative optimization method based on material testing, which comprises the following steps of: acquiring dynamic characteristic data in a forging process in real time by acquiring multi-dimensional material performance parameters, and constructing a multi-target collaborative optimization model; and intelligent collaborative configuration of the reduction rate parameters is realized by adopting a self-adaptive weight distribution strategy. And a thermal coupling factor normalization equation and a phase field free energy functional normalization model are established, and the technical problems that in a traditional forging process, due to empirical configuration of reduction rate parameters, the structure is uneven, and residual stress exceeds the standard are solved. A lightweight model is deployed through edge computing nodes, millisecond-level dynamic correction of an optimization scheme is realized in combination with a 5G industrial private network, and the grain size qualification rate and the size precision of the titanium alloy forgings are improved. The method improves the yield of the grain size of the forge piece, ensures that the residual stress of the forge piece is reduced, stably controls the size precision, and improves the batch stability of high-end titanium alloy parts.

The present application relates to the technical field of metal plastic forming, and discloses a titanium alloy radial forging reduction rate collaborative optimization method based on material testing, which acquires dynamic characteristic data of a forging process in real time through multi-dimensional material performance parameter collection, constructs a multi-objective collaborative optimization model, and realizes intelligent collaborative configuration of the reduction rate parameter by using an adaptive weight distribution strategy. A thermal coupling factor normalization equation and a phase field free energy functional normalization model are established to solve the technical problems of uneven structure and excessive residual stress caused by the empirical configuration of the reduction rate parameter in the traditional forging process. A lightweight model is deployed through an edge computing node, and millisecond-level dynamic correction of the optimization scheme is realized in combination with a 5G industrial private network, thereby improving the grain size qualification rate and size accuracy of titanium alloy forgings. The present application improves the grain size qualification rate of forgings, ensures stable control of the size accuracy while reducing the residual stress of forgings, and improves the batch stability of high-end titanium alloy components.

The invention relates to the technical field of high-temperature alloys, and provides a preparation method of an oversized ingot type high-temperature alloy forging material, which comprises the following steps: S1, heating a high-temperature alloy ingot; s2, the high-temperature alloy cast ingot obtained in the step S1 is subjected to pre-deformation, wherein pre-deformation comprises upsetting and drawing-out which are conducted in sequence; s3, the pre-deformed high-temperature alloy cast ingot is subjected to homogenizing heat treatment; s4, performing cogging thermal deformation on the high-temperature alloy ingot subjected to the homogenizing heat treatment; and S5, the forging stock obtained in the step S4 is cooled and then subjected to heat treatment, and finally radial forging is conducted. According to the preparation method of the high-temperature alloy forged material, firstly, a large-size high-temperature alloy cast ingot is subjected to pre-deformation with the small deformation amount, and then homogenization heat treatment is conducted at the high temperature, so that segregation phases in the cast ingot are redissolved, segregation elements are diffused, and the high-temperature alloy forged material is obtained. And after homogenization, the high-temperature alloy cast ingot is subjected to fast forging and radial forging, and the high-temperature alloy bar with the uniform structure is obtained.

The invention discloses a compact hydraulic clamping mechanism of a radial forging machine. The compact hydraulic clamping mechanism comprises a clamping module, a hydraulic servo module and a control unit module. The clamping module is of a single-layer push sleeve structure, a push sleeve is driven by a clamping cylinder to move axially, linear motion is converted into radial rotation of a clamping arm hinged to a clamp rod through matching of an inclined face of the push sleeve and a half shaft, and therefore a clamping jaw is driven to be closed or opened. The control unit module detects clamping force in real time through a pressure sensor, a hydraulic servo valve is adjusted through a controller, the pressure of oil entering a clamping cylinder is accurately controlled, and closed-loop dynamic accurate adjustment of the clamping force is achieved. The mechanism effectively solves the problems that a traditional chuck is long in axial size and insufficient in clamping force control precision by simplifying a mechanical structure and introducing electro-hydraulic servo control, and has the advantages of being compact in structure, high in adaptability, safe and reliable.

The invention discloses a titanium and titanium alloy thin bar continuous rolling production line and a rolling method. The rolling production line comprises a roughing roller set, a compensation heating device, a pre-finishing roller set, a temperature control device, a finishing roller set and a coiling device which are sequentially and linearly arranged. According to the production line, the (square) blanks can be linearly and continuously rolled into finished thin bars from one end to the other end, and the finished thin bars are coiled, so that the problems that the operation burden and the operation hidden danger exist in current reciprocating rolling, the temperature drop of the blanks cannot be effectively compensated in the continuous rolling process, and the production efficiency is low are solved. The problem that the temperature drop is further increased during material transfer among the procedures of radial forging, rough rolling and finish rolling is solved, so that the machining efficiency and yield of the titanium and titanium alloy coiled thin bars are effectively improved, meanwhile, the quality of finished products is further guaranteed through compensation and temperature control, and compared with remelting compensation after material transfer at present, the working efficiency is effectively improved, and the production cost is reduced. And the temperature compensation amplitude is reduced, so that the energy consumption of the whole processing stage is reduced.

The invention provides a preparation method of a high-strength and high-toughness GH4169 alloy bar and the high-strength and high-toughness GH4169 alloy bar. According to the preparation method, a steel ingot is machined in a mode of combining a fast forging cogging technology and an extrusion technology, and the problems that when radial forging forming is adopted, due to the fact that the diameter of a bar is small and cooling is fast, the surface of a forged bar is prone to cracking, and the grain size and delta phase distribution of the cross section of the bar are uneven are solved. And meanwhile, deformation passes are reduced, and the yield and the production efficiency of the alloy bar are greatly improved. Compared with a forged bar formed by adopting fast forging and radial forging, grains from the center to the edge of the cross section of the prepared extruded bar are uniform, and no delta phase is separated out. After extrusion is finished, through standard heat treatment, the strength of the bar is equivalent to that of a forged bar, and the impact toughness is greatly improved.

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 provides a niobium rod for an Nb3Sn superconducting wire niobium material and a preparation method of the niobium rod, and the preparation method of the niobium rod comprises the following steps: a, upsetting and drawing forging: carrying out n times of upsetting and drawing forging on a niobium cast ingot, n is any integer in 2-5, and carrying out annealing heat treatment in a gap between two times of upsetting and drawing forging or after the last upsetting and drawing forging, the upsetting and drawing forged round bar is obtained; b, radial forging is conducted, specifically, the upsetting and drawing forging round bar is subjected to radial forging; and c, rotary forging: carrying out rotary forging on the rod blank subjected to radial forging. The niobium rod prepared by the method meets one or more of the following items: the grain size is 7-8 grades, the elongation at break is greater than or equal to 40%, and the hardness (HV / 2.9 N) is greater than or equal to 40 and less than or equal to 65. Namely, the niobium rod prepared by the preparation method has at least one of the characteristics of uniform and fine grains, low hardness and high plasticity, and the comprehensive performance of the niobium rod is improved, so that the strict requirements of the Nb3Sn superconducting wire on the base material in high-field magnet application are met.

The invention relates to a method for controlling the uniform wall thickness of a radially forged hollow component. The method comprises the following steps: selecting a pipe blank and a core rod for hollow forging, wrapping the surface of one end of the pipe blank, painting an inner hole with an anti-oxidation coating, heating the pipe blank and lubricating the inner hole of a hot blank with glass powder, adopting proper rolling reduction during forging, configuring a blank feeding speed and a rotating angle of a precision forging machine during forging, controlling a forging sequence, and finishing and straightening at a high temperature. The high-precision hollow pipe blank and the core rod are adopted, and in order to achieve uniform deformation, friction is reduced from the temperature uniformity, anti-oxidation and lubrication modes of the blank; in order to ensure that metal flows are consistent, requirements are put forward from the aspects of forging deformation sequence and deformation parameter configuration; bending caused by forging and high-temperature normalizing is eliminated through radial warm forging, a key technology for controlling the wall thickness difference of the radial forging 40CrNi4Mo1V steel hollow component is formed, the wall thickness difference of a blank forging piece of the hollow component is smaller than or equal to 5 mm, the out-of-roundness of an inner hole is smaller than or equal to 3 mm, and the rough machining condition is met.

The application relates to the field of non-ferrous metal material smelting, in particular to a manufacturing method of a TB6 free forging piece with eliminated beta spots, which comprises the following steps: proportioning alloy raw materials according to the mass percentage of elements; adopting a vacuum consumable furnace to perform three times of vacuum consumable smelting on the alloy raw materials; performing high-temperature homogenizing diffusion annealing treatment on a TB6 titanium alloy ingot to obtain an annealed TB6 titanium alloy ingot; performing cogging on the annealed titanium alloy ingot by a quick forging machine; performing heat preservation on the TB6 titanium alloy blank at a temperature of 990-1000 DEG C for 5-6 hours; and performing water cooling after the heat preservation to obtain a water-cooled TB6 titanium alloy blank; performing T β The following 40-50 DEG C is heat preserved for 3-4 hours, and then is forged into a material by a radial forging machine. The application effectively solves the problem of beta spots which are prone to occur in TB6 titanium alloy products; can effectively control Fe segregation, eliminate beta spot defects in the TB6 titanium alloy product organization, and improve the product yield.

This invention discloses a low-nickel, high-nitrogen super austenitic stainless steel, its billet, a billet preparation method, and its applications. The chemical composition of the stainless steel is: C≤0.020%, Si≤0.60%, Mn≤0.80%, P≤0.025%, S≤0.020%, Cr: 19.50~20.50%, Ni: 16.50~17.50%, Mo: 6.0~6.3%, N: 0.45~0.55%, Cu: 0.5~1.0%, and ( w Ni + w Cu + w N )≥17.5, ( w Gr +3.3× w Mo +16× w N ≥45. This invention, through optimized control of chemical composition and a process design of initial rolling + homogenization treatment + radial forging + online solution treatment, enables the low-nickel, high-nitrogen super austenitic stainless steel to exhibit excellent corrosion resistance, significantly reducing alloy and manufacturing costs while meeting the basic performance requirements of super austenitic stainless steel.

The application discloses a manufacturing method of an ultra-low-temperature high-strength non-magnetic austenitic stainless steel rod, which comprises the following steps: forming a fine-grain protective layer on the surface of a steel ingot by radial forging, small-deformation high-frequency forging and breaking down, so as to reduce the cracking risk in the fast forging process; increasing the forging ratio by fast forging, upsetting and elongating; and making the structure of the center of the steel ingot recrystallize to a certain extent; and finally, forming the steel rod by radial forging, large-deformation low-frequency forging and breaking down, so that dynamic recrystallization occurs in the whole cross-section of the steel rod, and uniform equiaxed crystals are formed, thereby solving the problems of multiple forging times, easy surface cracking and poor structure uniformity of the ultra-low-temperature high-strength non-magnetic austenitic stainless steel rod.

The application discloses a kind of adaptive centering mechanism for radial forging machine unit, including symmetrically arranged sliding bracket, drive cylinder, base and slide. Wherein: sliding bracket is fixed to main machine by mounting plate, and is lifted along slide under the drive of cylinder;Base two ends are fixedly connected with sliding bracket, and two support shafts are arranged in parallel on it;Slide is slidably installed on support shaft, and V-shaped roller is arranged on its upper surface to support blank, and cylindrical roller bearing is installed on its back;Baffle is fixed to main machine and is provided with guide inclined plate.Working process, slide is self-adapting sliding alignment under eccentric blank thrust force, and cylindrical roller bearing is forced to reset along baffle inclined plate when falling.The application solves the problem of traditional mechanism centering, and significantly improves the adaptability and reset efficiency of large-tonnage radial forging machine to eccentric blank.

A method for manufacturing an equiaxed crystal target material, comprising the following steps: a metal bar is made into a forged base material by a radial forging process; the forged base material is made into a first plate material by a rolling process and a plate forging process, the rolling process is rolling along the axial direction of the forged base material; a second plate material is obtained by reciprocating an equal channel angular extrusion process on the first plate material with an equal channel angular extrusion die, the cumulative average equivalent strain of the second plate material is greater than 10, wherein the feeding direction of the first plate material into each equal channel angular extrusion die is the same as the rolling direction of the forged base material; and an annealing and recrystallization heat treatment process is performed on the second plate material to obtain an equiaxed crystal target material. Through the above steps, an equiaxed crystal target material with a grain size of not greater than 20 μm can be obtained for use in the semiconductor industry.

The utility model relates to the technical field of hammer heads of radial forging machines, in particular to a hammer head of a radial forging machine, which comprises a connecting part, a base body and a heightening layer. Wherein the connecting part is positioned at the bottom of the hammer head and is used for connecting the hammer head with the radial forging machine. The base body is fixedly connected between the connecting part and the heightening layer. The heightening layer is arranged on the side, away from the connecting part, of the base body and used for heightening the working layer, so that the hammer head of the radial forging machine can be used for machining materials with smaller diameters. Compared with the existing hammer head of the radial forging machine, the hammer head of the radial forging machine has the advantages that a layer of heightening layer is additionally arranged at the end part of the existing hammer head of the radial forging machine, so that materials with smaller diameters can be processed, alignment is easier in a chamfering process, and the risk of hurting people due to broken fragments caused by unbalanced loading stress of forged materials is reduced. And moreover, the heightened layer can be formed by welding an offline old hammer head of the radial forging machine on the base body by using a laser cladding method, so that the cost is low, the manufacturing period is short, and the smooth production can be ensured.

This invention relates to a method for preparing niobium rods with uniformly broken grains. First, alloy raw materials are melted and cast to obtain an ingot, which is then preheated to obtain a first billet. Next, the first billet undergoes multiple axial forgings and a first heat treatment to obtain a second billet. Then, the second billet undergoes surface treatment to remove surface defects and is radially forged to obtain a third billet. Subsequently, the third billet undergoes oxidation treatment to form an oxide film on its surface, protecting it. The third billet with the oxide film is then subjected to multiple roll forming processes to obtain a first rod. Next, the first rod is rotary forged and polished to obtain a second rod. Finally, the second rod undergoes a second heat treatment to obtain a finished rod. Through multiple axial forgings, radial rotary forgings, and roll forming processes, the resulting finished rod has a uniform and fine grain structure, a grain size GS=7-9, an elongation ≥40%, and a hardness (HV / 2.9N) ≤60.

The invention relates to a method for forging a forged workpiece (2) in a forging press (3), preferably designed as an open die forging press or a radial forging press, the method comprising manipulating the forged workpiece (2) by means of a workpiece manipulator (1) having a workpiece clamp (5), the workpiece clamp (5) having a chuck (6), the chuck defines a clamping axis (S) for the forging workpiece (2), and wherein the workpiece manipulator (1) performs a linear translational movement together with the forging workpiece between the stamping strokes of the forging press (3), the method further comprises determining the position of at least one end (4) of the forged workpiece (2) clamped into the workpiece clamp (5) on the clamping axis (S) relative to a reference point on the forging press (3), in particular relative to a mold of the forging press (3), by means of at least one measuring system arranged on the workpiece clamp (5) or on the workpiece clamp (5). The invention also relates to a workpiece manipulator (1) for the method according to the invention.

The invention discloses a rod type spring set buffer mechanism of a radial forging chuck. The rod type spring set buffer mechanism comprises an inner sliding sleeve, a worm gear, a worm and a plurality of spring rods distributed circumferentially. One end of the spring rod is fixed to the tailstock, and the other end is connected to the worm gear. According to the mechanism, a buffer point is arranged between the worm gear and the inner sliding sleeve, and forging impact energy is absorbed through bending deformation of the spring rod. The invention has the advantages of strong high-frequency adaptability, good transmission system protection effect, adjustable buffering force and the like. On the basis, the invention further discloses two optimized embodiments, namely a spring rod structure with the two ends fixedly supported, a layered buffering structure with a compression spring set additionally arranged, a switching mechanism capable of switching between the two buffering modes and a stepless speed changing and regulating system used for adapting to high-frequency impact. And the performance and the reliability of the mechanism are further improved.

The present invention discloses a low-cost method for preparing high-temperature titanium alloy bars. The titanium alloy is composed of the following components by mass: Al 8.0% to 10.5%, Zr 1.0% to 2.5%, Nb 0.5% to 1.0%, Mo 0.1% to 0.5%, Si 0.1% to 0.45%, O 0.15% to 0.25%, C ≤ 0.15%, with the balance being Ti and unavoidable impurities. The method comprises: 1. ingot smelting; 2. ingot forging and grinding; 3. bar billet radial forging; and 4. bar billet heat treatment and machining. The present invention designs the titanium alloy composition, employs a single-fire billet forging process combined with a multi-fire radial forging process, and controls process parameters and production processes such as deformation temperature and deformation amount. This results in a titanium alloy bar with high-strength room-temperature mechanical properties and excellent high-temperature performance. The bar is suitable for high-temperature applications such as aerospace engine components, aircraft structural parts, and fasteners.

The invention relates to a forging method of an M2 high-speed steel square forge piece, which comprises the following steps: 1) heating a blank, heating to 500 DEG C at a speed of less than or equal to 200 DEG C / h, heating to 850 DEG C at a speed of less than or equal to 60 DEG C / h, heating to 1070 DEG C at a speed of less than or equal to 80 DEG C / h, heating to 1150-1170 DEG C at a speed of less than or equal to 100 DEG C / h, cooling to 1125-1145 DEG C, and carrying out heat preservation forging; (2) a circle is forged on a 1800-ton radial forging machine, the diameter of the circle is 20-30 mm larger than that of the side of the square forge piece, the hammering amount of the first pass and the hammering amount of the last pass are 20-30 mm, and the hammering amount of the rest passes is 35-45 mm; (3) before forging, an axial feeding clamping jaw for clamping the blank does not rotate and only can do axial reciprocating motion, one-pass lower hammer forging is carried out to form a square piece, and a square forge piece with arc edges and corners is obtained; (4) after forging and forming, feeding to an annealing furnace, heating to 740-780 DEG C at the speed of less than or equal to 80 DEG C / h, preserving heat, cooling to 700-740 DEG C at the speed of less than or equal to 7 DEG C / h, cooling to 530-570 DEG C at the speed of less than or equal to 50 DEG C / h, opening a furnace door, cooling to 280-320 DEG C, and discharging; and (5) straightening is conducted after discharging, the materials are tiled, air-cooled and aired to the room temperature after being straightened, and the problems that uniformity and consistency are poor, the heating number is large, the outturn percentage is low, efficiency is low, and square forgings with arc-shaped edges and corners are not prone to being forged are solved.

The invention discloses a multi-instruction parallel control numerical control system and method for a radial forging machine, and the system comprises an upper computer system, a PLC (Programmable Logic Controller) control system, a motion control system, a sensor collection system and an execution device, the motion control system realizes multi-axis cooperative trajectory planning through the virtual axis module; the method comprises five steps of pass program editing, instruction classification analysis, collaborative logic decision, multi-axis closed-loop execution and automatic pass switching. Through instruction set programming and linkage control decision making, the pass switching time is shortened to 0.4 second, the multi-axis position control precision is improved to + / -0.1 mm, complex processes such as step shaft positioning and cone forging are supported, the forge piece type is expanded by 60%, the material loss is reduced by 10%, and the intelligent level and the production efficiency of the radial forging machine are remarkably improved.

The invention discloses a high-carbon niobium-tungsten alloy bar for a fastener and a preparation method of the high-carbon niobium-tungsten alloy bar. The method comprises the following steps: 1, selecting an extruded-state high-carbon niobium-tungsten alloy bar blank which is not damaged by grinding, and carrying out radial forging to obtain a forged bar blank; secondly, the forged bar blank is subjected to scaling and polishing treatment; thirdly, the polished forged bar blank is subjected to room-temperature rotary forging and heat treatment, and a rotary forging blank is obtained; fourthly, the room-temperature rotary swaging and heat treatment processes in the third step are repeated on the rotary swaging blank till the target product size is achieved, and a rotary swaging bar is obtained; and fifthly, the rotary swaging bar is subjected to machining and heat treatment, and the high-carbon niobium-tungsten alloy bar is obtained. According to the method, the extrusion-state high-carbon niobium-tungsten alloy bar blank is machined through the radial forging technology and the rotary forging technology, the technological parameters such as the heating temperature, the deformation amount and the cooling mode are controlled, the yield and the production efficiency are effectively improved, and the high-carbon niobium-tungsten alloy bar good in surface quality, uniform in structure and small in grain size is obtained; the material is suitable for high-temperature fields of fasteners for aerospace and the like.

The invention discloses a TB13 titanium alloy straight wire machining process method, and relates to the technical field of wire drawing processes, and the TB13 titanium alloy straight wire machining process method comprises the specific steps that S1, cogging forging is conducted; s2, radial forging; s3, rolling is conducted; s4, wire rod heat treatment; s5, roller die cold drawing and continuous annealing are carried out; and S6, vertical electric straightening is carried out. According to the method, the means of cogging forging, radial forging, rolling, wire rod heat treatment, roller die drawing, continuous annealing, vertical electric straightening and the like are effectively combined, comprehensive balance of dynamic recrystallization and grain nucleation growth of a TB13 titanium alloy structure is achieved, and thick and large ingot casting grains are fully refined; the continuous annealing procedure in the cold drawing process is reasonably arranged, residual stress possibly generated in the drawing process of the titanium alloy wire and caused by uneven local deformation is effectively removed, the grain structure is further refined, and energy conservation and environment protection are achieved.

This invention relates to the field of composite sealing ring molding technology, and more particularly to a composite sealing ring suitable for extreme temperature alternating conditions and its molding method. The method includes: optimizing the layer thickness ratio of the sealing ring; determining the structural dimensions based on the layer thickness ratio and the standard thickness of the sealing ring to fabricate an annular metal support skeleton; pre-treating the metal support skeleton; mixing metal powder and non-metal powder made from the metal support skeleton material in different proportions to obtain a transition layer, and laying it on the inner side of the metal support skeleton in a gradient manner; laying the mixed wear-resistant layer powder on the inner side of the transition layer; closing the mold for integrated pressing and sintering; after sintering, performing radial forging treatment; performing cryogenic treatment and wear resistance testing, and adjusting the set parameters based on the test data. The composite sealing ring prepared by this invention has a compact structure, which can ensure structural stability and sealing performance under frequent extreme temperature alternating conditions.

The application discloses a kind of titanium alloy body tube's elastic line bore integrated radial precision forging forming manufacturing process, first to the titanium alloy bar prepared for hot radial forging to obtain radial forging state bar material and ensure its radial cross-section shrinkage reaches 50% or more, and it is carried out blanking to obtain titanium alloy body tube with distortion state bar material;Subsequently, the titanium alloy body tube with distortion state bar material is carried out deep hole processing to obtain titanium alloy body tube with distortion state pipe material;Then, the titanium alloy body tube with distortion state pipe material is carried out core mould cooperation installation and semi-solid isothermal treatment, obtains semi-solid composite pipe material, and it is carried out semi-solid radial precision forging forming to obtain titanium alloy body tube blank with radial forging state fiber organization and semi-solid fine grain structure simultaneously;Finally titanium alloy body tube blank is carried out finishing and heat treatment to obtain titanium alloy body tube parts.The application has the characteristics of small equipment tonnage load requirement, good product mechanical property.

The invention provides a method and device for strengthening the surface of a large-length-diameter-ratio rotary body component. The method comprises the following steps that A, the large-length-diameter-ratio rotary body component is clamped to a rotary clamping system; b) axially moving the rotary body component with the large length-diameter ratio in an autorotation state, and sequentially passing through an air cannon radial forging area and a nitrogen ion heat treatment area; and C) after the nitrogen ion heat treatment is finished, cooling to room temperature in a protective atmosphere to obtain the surface-strengthened revolution body component with the large length-diameter ratio. The air cannon is used for replacing a mechanical forging hammer, mechanical damage is avoided, and the method is particularly suitable for thin-wall and inner hole strengthening; forging and nitriding are continuous, a dislocation / grain boundary network generated by forging serves as a rapid nitrogen diffusion channel, and the infiltration speed and the infiltration layer binding force are remarkably improved. And forging temperature rise is directly used for subsequent nitriding, energy is saved, consumption is reduced, and tissue change caused by secondary heating is avoided. And the design of rotation, axial movement and array cannon groups is adopted, so that the surface strengthening uniformity of the super-long workpiece is ensured.

The invention belongs to the technical field of metal part machining and manufacturing, and provides a diffusion welding method and device for a rotary part, and the method comprises the steps that an inner cylinder and an outer cylinder are provided; machining the outer surface of the outer cylinder to form an outer conical surface; the outer cylinder sleeves the inner cylinder; providing an outer conical cylinder tool, wherein the inner surface of the outer conical cylinder tool is provided with an inner conical surface matched with the outer conical surface; the outer conical cylinder tool is sleeved with an outer cylinder; and the outer cone cylinder tool is axially pressed, the cone sleeve is matched with the radial forging and pressing outer cylinder, the outer cylinder and the inner cylinder are combined in a diffusion welding mode, and the rotary body part is obtained. The taper sleeve radial forging and pressing technology from outside to inside is adopted to be matched with a special tool system, axial pressure can be efficiently converted into uniform radial welding pressure, and tight combination of the inner cylinder and the outer cylinder is achieved. The design of the first ring groove on the surface of the inner cylinder can increase the diffusion contact area and form mechanical interlocking, and further strengthen the bonding performance. The modularized special tool system can ensure accurate positioning and rapid clamping of the parts, and the production efficiency and the batch stability are remarkably improved.

The present application belongs to the technical field of radial forging machine control, and specifically relates to a high-precision radial forging machine control system and a control method thereof, which comprises the following steps: establishing a process parameter database, synchronously collecting dynamic parameters of a forging process through a multi-source heterogeneous sensor, acquiring a workpiece surface temperature field distribution through an infrared thermal imager, measuring a radial deformation amount through a laser displacement sensor group, and capturing material internal defect features through an acoustic emission sensor; calculating an optimal forging frequency according to real-time material rheological characteristics, generating a hammer head motion trajectory correction amount through a model predictive control algorithm; implementing dynamic compensation control, adjusting a hydraulic system back pressure through strain rate feedback, executing closed-loop quality evaluation, performing online metallographic analysis during a forging intermittent period, reversely correcting process parameters according to a grain size detection result, and predicting a workpiece fatigue life based on a digital twin model; and the present application has real-time dynamic control over the entire forging process, effectively eliminates errors and deviations, and leads to the effect of improving forging precision.

The application provides a GH2901 alloy bar forging method, which comprises the following steps: S1. weighing high-purity metals Cr, Ni, Mo, Al, Ti and graphite C, and adding the above raw materials into a smelting furnace to perform smelting, refining, pouring, and obtaining an electrode bar, and self-consumption remelting the electrode bar into a self-consumption ingot; S2. placing the self-consumption ingot in a heating furnace to perform homogenization high-temperature diffusion; S3. performing circumferential surface rolling and preheating of the self-consumption ingot; S4. axially forging the self-consumption ingot to obtain an alloy blank; S5. performing radial forging heat deformation and reheating of the alloy blank for 4-6 times to obtain an alloy round bar; S6. performing bright turning treatment of the alloy round bar; and S7. performing ultrasonic detection of the alloy round bar. The application reasonably optimizes the alloy component range; reduces element segregation of the self-consumption ingot through homogenization diffusion treatment; eliminates part of the as-cast structure through axial deformation; and forms fine and uniform grain structure through reasonable distribution of forging deformation rate and heating temperature.

The invention discloses an axial buffering system for a chuck of a high-frequency radial forging manipulator and a control method. The system comprises a plurality of groups of buffer plunger cylinders which are symmetrically arranged, a hydraulic power unit (comprising a variable pump and a safety valve), a pressure control unit consisting of an electro-hydraulic servo valve and a plug-in type pressure release valve, a rigid liquid tank with an adjustable volume and a pressure-displacement feedback sensor. The control method comprises two modes: compressed oil buffer control is executed under a single-machine working condition, and a hydraulic spring effect is formed through closed-loop pressure maintenance; pressure relief-pressurization control is executed under the double-machine working condition, active pressure relief and displacement absorption are conducted in the buffering stage, and hydraulic reset is driven according to a linear function attenuation signal in the reset stage. The axial buffering mechanism solves the problems that according to a mechanical plate spring type axial buffering mechanism of a traditional radial forging manipulator, a plate spring needs to be frequently replaced when the buffering rigidity is changed, large impact vibration exists in the buffering process, the reset time of a chuck is long, the service life of the buffering mechanism is short, and the feeding precision and efficiency are low.