86 results about "Homogeneous deformation" patented technology

The invention belongs to the technical field of mining engineering, discloses a mining roadway non-uniform three-dimensional deformation grading calculation and analysis method, and aims to solve the problems that a traditional point cloud comparison method is low in precision and large in error in a roadway high-deformation and non-uniform-deformation environment, and traditional monitoring wiring is complex and cannot achieve global coverage. According to the technical key points, in a GNSS-free underground environment, a portable three-dimensional laser scanning device integrating SLAM synchronous positioning and a map construction technology is adopted to collect two-stage roadway point cloud data, a centimeter-level precision three-dimensional model is constructed through a pose map optimization algorithm, a two-stage deformation hierarchical optimization algorithm is designed, and a two-stage deformation hierarchical optimization algorithm is designed. In the first stage, a deformation core point is selected based on super voxel segmentation, rough calculation is performed in a cylindrical projection space, and a key deformation area is rapidly identified, and in the second stage, a refined displacement amount is calculated for a point whose displacement exceeds a threshold value through geometric constraint and a centroid method, and the data quality is improved in combination with point cloud denoising, so that high-precision continuous monitoring of the full section of the roadway is realized.

The invention discloses an equivalence evaluation method for testing the fracture behavior of an irradiation metal material based on a small sample, belongs to the field of mechanical property testing, and deeply researches the size effect problems of non-uniform deformation and crack initiation of the metal material under the irradiation condition through three research means of experiments, theories and simulation. And a powerful basis is provided for performance evaluation of the metal material under the irradiation condition. In the aspect of experiments, micro-stretching and micro-cantilever beam experiments of samples with different sizes under irradiation conditions are carried out, and a correlation mechanism between irradiation material crack initiation and sample sizes is analyzed. On the theoretical aspect, a dislocation channel-grain boundary interaction model is established, and prediction of fracture toughness of irradiation samples of different sizes is achieved. In the aspect of simulation, a finite element simulation system for non-uniform deformation, crack initiation and size effect of the metal material under the irradiation condition is established, and the influence of irradiation and sample size on microstructure evolution and macroscopic fracture behavior of the material is explored.

The invention discloses a method for evaluating the bending durability of an arc-shaped screen under the action of multi-point aggregation force, and the method comprises the steps: simulating the local stress distribution of the arc-shaped screen under the action of the multi-point aggregation force through a finite element analysis method, and obtaining the distribution data of a stress concentration region; according to the distribution data of the stress concentration area, performing local grid encryption on the arc-shaped screen to obtain a high-resolution local stress distribution model; aiming at the local stress distribution model, acquiring non-uniform deformation data under the action of multi-point aggregation force, and determining a local deformation behavior of the screen; the stress unbalance degree of the overall structure of the arc screen is calculated through the non-uniform deformation data, and the overall stress distribution state is obtained; if the overall stress distribution state exceeds a preset unbalance threshold value, adjusting grid parameters of the local stress concentration area, and obtaining an optimized stress distribution model; and according to the optimized stress distribution model, obtaining correlation data of local aggregation deformation and overall bending performance, and determining the potential risk of the long-term failure mode.

This invention discloses a method for analyzing the meridional strain of air springs based on piecewise integration of elliptical arc length, belonging to the technical field of vehicle suspension systems or rubber elastic elements design. The method includes the following steps: approximating the arc segment from the top of the air spring generatrix to the outermost bulge point as the first quadrant of an ellipse, determining the major and minor semi-axes of the reference and inflation states; introducing normalized coordinates to establish a linear mapping of the abscissas of the two states, constructing an elliptical arc length infinitesimal element and transforming it to the same interval for integration; dividing the interval into even-numbered equal parts, using the complex Simpson method to obtain the arc length piecewise, calculating the ratio of the inflation arc length to the reference arc length as the elongation ratio, and taking the natural logarithm to obtain the true meridional strain of each segment of the generatrix; this invention can accurately describe the non-uniform deformation of each segment of the generatrix during air spring inflation, providing a basis for strain prediction and fatigue assessment.

The invention discloses a cross-fault-zone subsea tunnel structure non-uniform deformation identification and positioning method, which comprises the following steps: firstly, acquiring cross-fault-zone subsea tunnel BOTDA strain data, and respectively carrying out abnormal value processing, fitting and tidal residual strain separation on the strain data to obtain strain data with fault zone spatial characteristics; secondly, the strain data of the fault zone and the adjacent non-fault zone are clustered based on a Gaussian mixture model, a clustering strain mean value is extracted, and a strain mean value difference feature vector is constructed; a PSO algorithm is adopted to optimize an RF model to recognize a strain mean value difference time-varying curve, an LDSA algorithm is adopted to generate a high-resolution three-dimensional feature thermodynamic diagram for a non-uniform deformation region, and therefore the non-uniform deformation region is accurately positioned. According to the method, solid data support can be provided for identification, evaluation and disposal of uneven deformation of the tunnel structure, so that a more scientific management and maintenance decision is made, and subway operation safety is effectively guaranteed.

The local constraint radial progressive forming method comprises the steps that a rectangular ring blank is adopted, the inner circumferential face and the outer circumferential face of the lower end of a ring piece are restrained through a fixed mold on expansion and shrinkage integrated equipment, the outer circumferential face and the inner circumferential face of the upper end of the ring piece are extruded through a deformation mold, and the deformation mode of radial gradual bending is completed; wherein the fixed mold is of a fan-shaped structure provided with a groove, a groove is formed in the bottom of the fixed mold and allows the rotating rod to penetrate through, the deformation mold is of a step type molded surface, the inclination angle of the deformation mold is gradually increased, the final molded surface is an L-shaped corresponding contour, and the single-time deformation is controlled within 2%. The method can solve the problems that in the traditional L-shaped ring piece manufacturing process, the material utilization rate is low, the metal streamline is damaged, the fishtail defect is caused by uneven rolling deformation, warping and wave-shaped contours occur in traditional bulging hole shrinkage, meanwhile, the roundness size of the L-shaped ring piece can be corrected, deformation is even, and the application prospect is wide.

The invention belongs to the technical field of plastic processing of aluminum-based composite materials, and particularly relates to a multi-directional forging method for a particle reinforced aluminum-based composite material sheath with progressively-decreased deformation amount, in particular to a multi-directional forging method for a particle reinforced aluminum-based composite material sheath with progressively-decreased deformation amount. The method aims at solving the problem that according to an existing multi-directional forging process, large-accumulation uniform deformation is difficult to achieve while cracking is restrained for the particle-reinforced aluminum matrix composite. The method comprises the steps that wrapping treatment is conducted; multi-directional forging is carried out in a wrapping state; in the multi-direction forging, the deformation of the initial three passes is set to be 20%-30%; every time three equal-deformation forging passes are completed, the deformation of every three subsequent passes is reduced by 0%-25% compared with the deformation of the previous three passes, and the deformation is circularly and progressively reduced until the accumulated deformation reaches a preset target value. The cracking tendency of the particle reinforced aluminum-based composite material in the multidirectional forging process is reduced through the synergistic effect of wrapping sleeve constraint and deformation decreasing, and the quality and performance of a forged piece are effectively improved.

The invention relates to the technical field of air inlet cap hood forming, in particular to a Ti65 alloy air inlet cap hood forge piece uniform deformation control process which comprises the following steps: firstly, preparing an original blank with a specific fillet characteristic and a bevel edge positioning characteristic; then forming through two-stage hot die forging: pre-forging at the temperature of 990-1010 DEG C to obtain a pre-forged blank with a bottom trapezoidal bulge, a conical inclined surface and a groove; and finally, carrying out finish forging at 1000-1030 DEG C to obtain a final forge piece. Through the optimization design of the shape of the pre-forged blank, the deformation amount of the conical thin-wall section is transferred to the small-diameter solid bottom, the overall coordinated and uniform deformation of the forged piece is achieved, the problems of surface cracking and uneven structure are effectively solved, the forming load is reduced from 14000 tons to about 7000 tons, and the service life of a die is remarkably prolonged.

The invention discloses a method for multi-dimensional uniform deformation of a micro-nano structure, belongs to the technical field of advanced material processing and manufacturing, and solves the problems of product structure distortion and out-of-control precision of a nano-scale structure caused by low shrinkage rate and non-uniform sintering process densification in the prior art. The method comprises the following steps: uniformly mixing matrix powder, an activator and a morphology stabilizer to obtain a mixture, and carrying out micro-injection molding on the mixture to obtain a pre-amplified micro-nano structure; performing segmented degreasing on the pre-amplified micro-nano structure, performing gradient sintering, and performing hot isostatic pressing treatment to obtain a multi-dimensional uniformly-deformed micro-nano structure; wherein the matrix powder comprises metal powder and / or ceramic powder, the activating agent is eutectic alloy with the melting point smaller than or equal to 200 DEG C, and the morphology stabilizing agent is rare earth metal oxide and / or transition metal oxide. The invention has the advantages of high shrinkage rate, uniform shrinkage and high mechanical strength.

The invention relates to an anti-tear thin-wall sealing rubber sleeve for an open hole well, which comprises a rubber sleeve body, at least one group of bearing rings are arranged on the inner wall of the rubber sleeve body, and at least one group of outer tension bands are arranged on the shoulder part of the outer wall of the rubber sleeve body. Compression type operation is adopted in the setting process, when axial pressure is applied, the rubber sleeve body is extruded and expanded firstly, the second bearing ring plays a role in righting and guiding, it is guaranteed that a sealing ring belt in the center section of the rubber sleeve body deforms evenly, and preliminary sealing is achieved; along with increase of pressure, the upper section and the lower section of the rubber sleeve body gradually expand till making contact with the well wall, the first bearing ring and the third bearing ring are driven to cooperatively deform, sealing is further enhanced, and mechanical protection is provided; under the condition of extreme deformation, the first outer tension band and the second outer tension band can effectively limit radial displacement of the shoulder of the rubber sleeve body, and tearing or failure of the rubber sleeve body caused by too large deformation is avoided.

The application discloses a three-dimensional deformation inversion and non-uniform deformation evaluation method based on regional pressure disturbance, collects regional scale multi-source data; constructs a two-dimensional pressure field model, simulates a pore pressure change process; constructs a layered vertical deformation calculation model, calculates vertical deformation of each stratum unit under the action of pressure disturbance; constructs a deformation transmission model along the depth direction, maps the vertical deformation to different depth positions, forms a three-dimensional vertical deformation field, and calculates a non-uniform deformation gradient field; compares and verifies the three-dimensional vertical deformation field with surface vertical deformation monitoring data, corrects three-dimensional vertical deformation field model parameters; and carries out engineering application analysis. Through the construction of the regional two-dimensional pressure field model, the layered vertical deformation calculation model and the verification mechanism with the monitoring data, the quantitative inversion of the underground multi-depth vertical deformation and the deformation gradient is realized, and reliable three-dimensional deformation information can be obtained under the historical and future injection-production working conditions, which is used for engineering safety evaluation.

The invention relates to the technical field of metal cutting, in particular to composite brake drum precision turning equipment and method based on a PCBN cutter, and the method specifically comprises the steps that the temperature change and wall thickness distribution in the brake drum machining process are monitored in real time, and the distance between each area and the bottom of the brake drum and the distance between the cutter position and each area position at each moment are combined; constructing a regional comprehensive deformation degree; based on the difference between the regional comprehensive deformation degrees of different regions of each part, the regional deformation difference degree of each part is determined, the historical fluctuation condition of the regional deformation difference degree of each part at the current moment is analyzed, the parameter adjustment coefficient of each part at the current moment is determined, and cutting parameters are optimized in real time according to the coefficient; turning the brake drum; and non-uniform deformation caused by non-uniform wall thickness, heat accumulation and structural constraint can be effectively weakened, the stability of the machining process is improved, and therefore the machining quality of the composite brake drum is improved.

The invention provides a wheel cover outer plate closed drawing stamping process improvement method and an automobile wheel cover outer plate, and relates to the technical field of automobile part manufacturing. Through a logic closed loop of'identifying a benchmark problem, optimizing local geometry to reduce risks, changing a feeding mode to realize full stretching, balancing integral feeding to promote uniform deformation, and obtaining a stable product through comprehensive application ', 'cracking prevention' and'rebound control 'treatment are realized. According to the method, the flow and deformation field of the plate in the forming process is reconstructed by adjusting the draft angle, the size of the plate, the parameters of the draw bead and other technological means, so that the material can obtain sufficient and uniform plastic stretching on the whole molded surface including the wheel brow and the two ends, the stress distribution state in the material is improved, and the material quality is improved. And the residual stress level is reduced, so that the cracking risk and the rebound tendency are relieved at the same time.

The utility model relates to the technical field of forming dies, in particular to a forming die with a guide structure, which comprises an upper die plate, the bottom of the upper die plate is in threaded connection with the top of an upper die, and a lower die is arranged at the bottom of the upper die. Guide plates are arranged on the outer walls of the left side and the right side of the upper mold; a pressing groove is formed in the bottom of the upper mold; and guide grooves are formed in the outer walls of the left side and the right side of the lower mold. According to the device, the upper die plate and the upper die are rapidly and accurately assembled according to the design of corresponding screw holes, the connection firmness is enhanced, disassembly and maintenance are convenient, the T-shaped guide plate is inserted into the guide groove to limit transverse deviation and automatically align, and the part forming precision and the service life of the die are guaranteed. The pressing groove and the curved surface of the lower die are attached to the outline of a part, plate materials are guided to deform evenly, cracks are reduced, and shape precision is ensured. The weight of the upper die weight reducing groove is reduced by removing non-critical materials, the equipment load is reduced, the operation safety and the forming stability are improved, and material utilization and function balance are optimized.

The utility model relates to the technical field of geotechnical engineering anchor cable support, and discloses a grouting hole sealing bag suitable for a miscellaneous fill stratum, which comprises a steel strand, a hole sealing bag body is arranged outside the right side of the steel strand, and an exhaust hole is arranged on the left side of the hole sealing bag body. And bag fixing clamping plates are arranged outside the left side and the right side of the hole sealing bag body correspondingly, a plurality of isolation supports are evenly arranged on the opposite sides of the steel strands, and a grouting assembly is arranged on the left side of the hole sealing bag body. According to the utility model, through the design of a multi-layer composite structure, the bag can well adapt to the complex soil body environment of a miscellaneous fill layer, effectively resist the influence of non-uniform deformation and corrosive substances, prolong the service life of the bag and improve the hole sealing quality; the sealing performance and the installation stability of the bag in a miscellaneous fill layer are further enhanced, the reliability of grouting and hole sealing of the anchor cable is ensured, and the safety and the stability of an anchor cable supporting structure of the whole geotechnical engineering can be improved.

The application discloses a manufacturing method of an HR120 alloy ring forge piece for aerospace steam turbines, and the technical scheme comprises the following steps: step S1, preparing an alloy ingot; step S2, blanking; step S3, heating: the electroslag ingot is loaded into a furnace at a temperature of less than or equal to 600 DEG C, then heated to 910 DEG C, kept for a period of time, and heated to 1180 DEG C and kept for a period of time; step S4, forging: the forging blank is transferred to a press by a forging loading machine for forging, the last axial deformation of the forging is greater than or equal to 4, and the tangential deformation is greater than or equal to 1.5, and the forging comprises the following working steps: a first working step of upsetting the forging blank; a second working step of hole expanding of the forging blank; a third working step of first ring rolling of the forging blank; a fourth working step of rounding the sharp edges of the forging blank; a fifth working step of second ring rolling of the forging blank; step S5, cooling after forging: water cooling to obtain the forging piece; and step S6, performance heat treatment: the forging piece is subjected to solid solution, and the forging piece is uniformly deformed to obtain uniformly fine directional grains, so that the mechanical properties and grain size requirements of the product are met.

The invention provides a heat treatment method for a low-temperature service-oriented precipitation type medium-entropy alloy friction stir welding joint, and belongs to the technical field of medium-entropy alloys. According to the method, recrystallization is conducted on a welded joint and a heat affected zone through solution treatment, the material structure tends to be homogenized, stress concentration is relieved, uneven deformation is effectively relieved, a rod-shaped L12 strengthening phase is further separated out through short-time aging treatment, formation of other oxides is restrained, and the welding quality is improved. The dispersion strengthening effect is promoted through precipitation of an L12 phase in the aging treatment process, and the strength of the medium-entropy alloy is further improved; through the synergistic effect of solution treatment and aging treatment, the comprehensive mechanical property of the low-temperature service-oriented precipitation type medium-entropy alloy welding joint at normal temperature and low temperature is remarkably improved, and the problem that the mechanical property of the welding joint is degraded due to uneven deformation and stress concentration is solved.

The present disclosure provides a springback compensation method, device, equipment and medium for a stamping die surface, the springback compensation method comprising: performing stamping process simulation on an initial die surface to obtain simulation grid data; performing non-uniform offset processing on the simulation grid data to obtain offset grid; and reconstructing the offset grid into a compensated die surface by using a density clustering algorithm. The simulation grid data containing wall thickness distribution is obtained based on the stamping process simulation of the initial die surface, providing accurate physical basis for subsequent compensation, and the offset grid adapting to the non-uniform deformation of the sheet metal is generated through non-uniform offset processing, breaking through the limitation of traditional equidistant offset that cannot cope with complex springback of high-strength steel. Finally, the offset grid is reconstructed by using the density clustering algorithm, which compresses the number of control points of the curved surface to improve efficiency while accurately retaining the global deformation characteristics of the sheet metal, thereby effectively suppressing the stamping springback of high-strength steel and greatly improving the forming precision of the stamped part.

The application relates to the technical field of mining engineering, in particular to a method for designing a roadway surrounding rock support scheme by constructing a numerical model, which comprises the following steps: obtaining joint fissure information of a roadway bare rock mass; obtaining an RQD value of a coring drill hole, obtaining basic physical and mechanical parameters of the rock mass; obtaining basic physical and mechanical parameters of the rock mass; constructing an initial block model; adding joint fissures, and cutting the initial block model by using the joint fissures to construct a complex joint rock mass roadway numerical model; assigning parameters to the numerical model; setting boundary conditions for the numerical model, and performing excavation operation; analyzing monitoring data in the excavation operation process, and designing a roadway surrounding rock support scheme. The method combines numerical simulation and field research, simulates non-uniform deformation and failure characteristics of the surrounding rock of a deep roadway under the condition of a non-homogeneous rock mass, is accurate and reliable in numerical calculation, can accurately locate a roadway surrounding rock instability and failure area, and provides a basis for designing a roadway surrounding rock support scheme.

This invention discloses a hot stamping forming device for high-strength steel plates and its usage method, belonging to the field of hot stamping forming technology for high-strength steel plates. The key technical points are: a support arm is provided at the upper end of the worktable; a hydraulic telescopic rod is provided on the side of the support arm corresponding to the worktable; two sets of moving rods and an upper mold are respectively provided at the telescopic end of the hydraulic telescopic rod from top to bottom; the upper mold is higher than the ends of the two sets of moving rods; a placement groove is provided at the upper end of the worktable; a base is provided in the placement groove; a lower mold is provided on the upper end of the base; and the lower mold corresponds to the upper mold. This invention solves the problem in the prior art where, if a traditional direct-drive ejector is used to eject the formed workpiece, and if synchronous pressure is not applied to the entire contact surface, localized stress will be generated in the weak parts of the workpiece, leading to non-uniform deformation of the workpiece.

The invention provides a refractory high-entropy alloy with a layered heterostructure and a preparation method and application of the refractory high-entropy alloy, and belongs to the technical field of light refractory high-entropy alloys. Low-density and high-melting-point Ti, Nb and Zr are selected as main elements, V is added to cooperate with Al to achieve the light weight effect, the content of all the elements is controlled, the alloy phase separation tendency is reduced, a single body-centered cubic disordered solid solution is kept, uneven deformation in the cold rolling deformation process is used for forming a high-dislocation-density deformation band, and the high-dislocation-density deformation band is formed; ni is added to promote a deformation belt to preferentially nucleate and grow in the recrystallization annealing process, then a layered heterostructure composed of double-peak crystal grains is obtained, and the plasticity of the alloy is improved while the alloy strength is guaranteed.

The invention belongs to the technical field of magnesium alloy forging, and particularly relates to a magnesium alloy die forging design and a forging streamline control method thereof. Through the steps of part difficulty analysis, die forging digital-analog design, strain optimization, streamline optimization and the like, the forging is subjected to local heightening design, strain distribution of different area positions of the die forging is adjusted, and the deformation uniformity of the magnesium alloy die forging is guaranteed. In order to solve the problem of low local performance of the existing magnesium alloy die forging due to non-uniform material distribution, non-uniform deformation, angle between the streamline and the use direction of the forging and the like, the invention innovatively provides a method for adjusting the streamline distribution and the dependent variable of the low part in a local heightening manner; and meanwhile, provisions and requirements are provided for technological parameters such as forging allowance and draft angle, effective control over the streamline is achieved through finite element simulation analysis, streamline distribution optimization design is conducted in combination with an actual die forging streamline distribution result, and various properties, especially the fatigue property, of the blank are obviously improved.

The application discloses a kind of for suspension single-track double-line curve track beam crossbeam structure, suspension single-track double-line curve track beam includes the track beam being arranged in two sides, the track beam is the steel structure track beam of open thin-walled section, it is characterized in that the web of crossbeam is aligned with the transverse stiffener of track beam, the roof of crossbeam is aligned with the roof of track beam, the bottom plate of crossbeam is aligned with the bottom plate of track beam, the top of transverse stiffener outside track beam is equipped with variable-height transition section and is connected with the roof of crossbeam.The crossbeam and its connecting structure of the application can constrain the bending-torsional deformation of left line and right line track beam of curve section, make structure stress uniform, deformation coordination, so that the vertical displacement and torsion angle of track beam are greatly reduced, the applicable span of curve track beam is increased, and the smoothness and comfort of train driving in curve section are improved.

The present application relates to the technical field of steel metallurgy and metal rolling, in particular to a billet rough rolling and spreading method and system, comprising: a step of constructing a non-uniform deformation zone geometry: configuring a special-shaped pass based on a flow resistance gradient, and establishing a non-uniform hydrostatic pressure field; a step of executing forced transverse flow deformation induced rolling: forcing the metal to actively migrate in transverse mass from the center to both sides; a step of collecting lateral pressure rheological response data: monitoring width and resistance fluctuations and calculating lateral pressure rheological response lag time; a step of implementing dynamic lateral pressure adaptive control: applying dynamic lateral pressure to the intermediate billet based on the lag time, suppressing overturning instability and correcting the spread; the present application changes the direction of the minimum resistance of metal flow, solves the problem of time and space asynchronization between the system and flow deformation, and ensures the rolling stability of the non-steady state section.

This invention relates to a high-strength and high-toughness ZrNbTa-based refractory high-entropy alloy and its preparation method, belonging to the field of metallic materials technology. The atomic percentage expression of the refractory high-entropy alloy is denoted as Zr. a Nb b Ta c M d M is one or more of Al, Fe, Co, Cr, Ni, Cu, Mg, Be, Si, C, O, N, B, and rare earth elements, with 10≤a≤50, 15≤b≤53, 17≤c≤60, 0≤d≤15, a≠b≠c, 50≤b+c≤80, c≥b / 2, and a+b+c+d=100; the high-entropy alloy is a double BCC phase with a modulus mismatch ≥0.274. By optimizing the alloy composition, a high modulus mismatch is achieved, and the microstructure is controlled to obtain a double BCC structure, thereby achieving both high strength and high uniform deformation capability.

The invention relates to the technical field of material nondestructive testing, and discloses a deformation non-uniformity detection method for an oversize high-strength steel material. A detection point array is constructed on the surface of the super-huge high-strength steel member, interference measurement is performed on all detection points in an unloaded state and a loaded state respectively, two groups of interference intensities are obtained, and significant deformation points are marked by differential combination with a jump threshold value; the method comprises the following steps: normalizing interference intensity, extracting a phase difference, carrying out global phase unwrapping, converting the phase difference into a component surface normal displacement data set according to an interference displacement relationship, calculating a displacement difference of adjacent points according to dot matrix geometry to obtain a local displacement gradient, calculating an average value and a standard deviation of the gradient to form a global non-uniformity index, and setting a self-adaptive threshold value; and the gradient of each point is compared to identify non-uniform deformation risk points and output a detection result, so that surface deformation information is uniformly collected, real deformation and noise are distinguished, interference is reduced, and a risk area is identified in a component range.

The utility model discloses a locking ring milling device which comprises an executing mechanism used for milling a locking ring, a milling tool used for installing the locking ring and a fixing mechanism used for clamping the milling tool. The milling tool comprises a mandrel and an annular opening sleeve, wherein the mandrel is of a T-shaped structure in space, and the outer surface of the locking ring is sleeved with the annular opening sleeve. Wherein the larger end of the mandrel extends into an inner hole of the locking ring, a step surface II matched with the lower surface of the larger end of the mandrel is arranged on an inner hole of the annular opening sleeve, the depth of the inner hole of the annular opening sleeve is smaller than the height of the locking ring, and the outer surface of the annular opening sleeve is clamped through an external fixing mechanism. According to the device, the mandrel of the T-shaped structure is matched with the opening sleeve, clamping force concentrated on two points on the outer side of the locking ring is evenly distributed on the circumference, point contact is changed into surface contact, the contact area is increased, and a product is evenly stressed and evenly deformed.

The invention relates to the technical field of forging, in particular to a high-flaw-detection-level titanium alloy cake piece preparation method based on free forging. Comprising the following steps that S1, blanking is conducted, specifically, the two end faces of a titanium alloy bar are chamfered, and a blank is obtained; s2, free forging is conducted, specifically, the blank is subjected to drawing-out and upsetting in the axial direction and the radial direction correspondingly, and a forged piece is obtained; and S3, heat treatment is conducted, specifically, primary annealing and secondary annealing are conducted on the forge piece, and the titanium alloy cake piece is obtained. According to the method, uniform deformation of the forged piece is guaranteed through axial drawing-out, grains at the center are guaranteed to be broken through equidirectional upsetting, dendrites, segregation and other defects at the center of the blank can be broken, drawing-out and upsetting are conducted through reversing, and it is guaranteed that the structure of the forged titanium alloy cake piece is uniform so that the high flaw detection level can be achieved.