173 results about "Homogeneous deformation" patented technology

The invention discloses an inclined shaft formwork design method based on digital modeling and sliding mode optimization, and the method comprises the steps: drawing a complete three-dimensional digital model of an inclined shaft through employing a geographic information system and a building information model, obtaining the high-precision inclined shaft data through combining with the technologies of laser scanning, an unmanned aerial vehicle and the like, and guaranteeing the accuracy of the model; an included angle between a tangent line and a normal line of each segment is calculated through an inclined shaft curve equation, and a precise geometric basis is provided for optimization design of the formwork based on the divided pouring areas and bin division starting and ending points; the optimal scheme of sliding mode segmentation is calculated by adopting an optimization algorithm, the structural deformation of the template is emphatically optimized, and the rationality of the position, angle and transition part of each segment is ensured; finally, through the accurate three-dimensional inclined shaft model and optimal design, the overall construction formwork is constructed, the precision and stability of inclined shaft formwork design are improved, it is ensured that in the construction process, stress of the formwork is uniform, deformation is minimized, and the construction efficiency and safety are remarkably improved.

The invention discloses a high-precision flying shear, which belongs to the field of metal cutting, and comprises a portal frame, and a pinch roll is rotatably arranged on the portal frame; a first rotating roller and a second rotating roller are rotationally mounted on the portal frame, and cutters are mounted on the outer walls of the first rotating roller and the second rotating roller; a driving mechanism for driving the first rotating roller and the second rotating roller to rotate is arranged on the portal frame; two mounting frames are symmetrically arranged on the inner side wall of the portal frame; in the process that the pinch roll drives the plate to move, under the action of friction force, the heat dissipation plate moves along with the to-be-sheared plate, in the process that the heat dissipation plate moves along with the plate, the turbulent flow mechanism drives air around the heat dissipation holes to flow, the flow speed of the air around the heat dissipation holes is increased, and therefore the to-be-sheared part can be cooled; the temperature difference between the to-be-sheared part and the cutter is reduced, the thermal-mechanical coupling effect is relieved, the probability of uneven deformation in the shearing process is reduced, the probability of generation of wave-shaped edge defects is obviously reduced, and therefore the shearing quality is improved.

The invention provides a rolling forming method for a complete shape follow-up streamline raceway of a tapered roller bearing, and belongs to the field of bearing preparation. According to the size of an outer ferrule of the tapered roller bearing, a blank is designed, the size of a blanked bar and the size of the blank are determined, blanking is conducted to obtain a material section, and the height-diameter ratio of the bar is controlled to be small in the blanking process; the bar is subjected to upsetting according to the upsetting ratio to obtain an intermediate material, the upsetting ratio is controlled to be small in the upsetting process of the bar, the intermediate material is subjected to extrusion forming and stamping to obtain a blank, and the blank is punched to form a ring blank; and the ring blank is rolled through the fully-closed hole pattern to achieve rolling path streamline follow-up forming to obtain a final forge piece, and the rolling ratio is controlled to be large under the condition that a core roller can be placed in the fully-closed hole pattern. The influence of the blanking process on subsequent blank making is considered, and the bar size and the blanking diameter are designed, so that the height-diameter ratio of the bar is as small as possible, and the radial flow of bearing ring metal at the stage is reduced; and in consideration of the influence of the upsetting process on subsequent rolling metal flow, a reasonable upsetting ratio is designed, so that the upsetting ratio is as small as possible, and the adverse influence of non-uniform deformation in the forging process on metal streamline distribution is reduced.

The utility model discloses a stator iron core and a motor, the stator iron core comprises a plurality of stator punching sheets which are sequentially arranged along the circumferential direction, the two ends of the stator punching sheets in the circumferential direction are respectively provided with a splicing block and a splicing groove, the stator punching sheets are at least provided with a stress hole, and the stress hole is provided with a plurality of stress holes. Every two adjacent stator punching sheets are spliced through the splicing block of one stator punching sheet and the splicing groove of the other stator punching sheet. According to the utility model, the splicing blocks and the splicing grooves are respectively arranged at the two ends of the stator punching sheet in the circumferential direction, so that the stator iron core is more convenient to splice, and the subsequent welding process is more convenient; meanwhile, the stress holes are arranged to absorb the stress of the hot jacket, the deformation degree of the stator core is reduced, and the deformation part of the stator can be guided to the stress holes to deform, so that the uniform deformation of the stator core is realized, and the iron loss amplification caused by the deformation of the stator core is further reduced.

The invention discloses a deflection test device and method. The deflection test device comprises a side rod pushing system, a pre-tensioning system, a measuring system and a control system, according to the invention, the driving shaft is lifted to lengthen the sample, and preload is applied to the sample, so that the stretching of the tire internal pressure on the material can be simulated, and the actual stress state of the tire material can be reflected; the deflection degree of the sample deflection test can be adjusted by adjusting the displacement of the reciprocating motion of the side rod; according to the invention, by changing the head shape and width of the side rod head, different deflection shapes and non-uniform deformation of the test can be formed, and the real deformation condition of a tire grounding area can be simulated. According to the device, the deflection degree of a sample deflection test can be adjusted, different deflection shapes and non-uniform deformation of the test can be formed, the real deformation condition of a tire grounding area can be simulated, and a test basis is provided for measuring the deflection resistance of materials and structures.

A method for preparing a biodegradable zinc alloy semi-solid billet is provided, in which a biodegradable Zn—Mg—Bi—Ca—Sr zinc alloy ingot is subjected to homogenization annealing and three-directional compression deformation to obtain a uniformly-deformed three-directional upset billet. The three-directional upset billet is subjected to semi-solid isothermal heat treatment to obtain the semi-solid billet. A biodegradable zinc alloy semi-solid billet prepared by such method is also provided.

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 provides a magnesium alloy conical barrel and a preparation method and application thereof, and belongs to the technical field of magnesium alloy. The preparation method of the magnesium alloy conical barrel comprises the following steps that a magnesium alloy cast ingot is subjected to annealing treatment, and an annealed cast ingot is obtained; the cast ingot subjected to annealing treatment is subjected to multidirectional forging, and a first cast ingot is obtained; the first cast ingot is subjected to bidirectional drawing-out forging, and a second cast ingot is obtained; the second cast ingot is subjected to die forging, and a conical barrel is obtained; and the conical barrel is subjected to T6 heat treatment, and the magnesium alloy conical barrel is obtained. According to the method, the magnesium alloy ingot is subjected to annealing treatment firstly, so that residual stress can be eliminated, cracking of the ingot in the subsequent deformation process is avoided, then multidirectional forging, bidirectional drawing-out forging and die forging are adopted, and the problem that a large-size magnesium alloy ingot blank is prone to cracking due to uneven deformation in the deformation process is solved; the growth of deformed grains in the heat preservation process is effectively inhibited, and the grain size is refined.

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 relates to the technical field of mining engineering, in particular to a method for designing a roadway surrounding rock supporting scheme by building a numerical model, and the method comprises the following steps: acquiring joint fissure information of a roadway bare rock mass; obtaining the RQD value of the coring drill hole, and obtaining the basic physical and mechanical parameters of the rock; basic physical and mechanical parameters of the rock mass are obtained; constructing an initial block model; joint fissures are newly added, the initial block model is subjected to block cutting through the joint fissures, and a complex jointed rock mass roadway numerical model is constructed; performing parameter assignment on the numerical model; setting boundary conditions for the numerical model, and performing excavation operation; monitoring data in the excavation operation process are analyzed, and a roadway surrounding rock supporting scheme is designed. According to the method, numerical simulation and field investigation are combined, the non-uniform deformation failure characteristics of the surrounding rock of the deep roadway under the non-homogeneous rock mass condition are simulated, numerical calculation is accurate, reliability is high, the roadway surrounding rock instability failure area can be accurately positioned, and a basis is provided for designing a roadway surrounding rock supporting scheme.

The present invention involves performing a rolling process on a steel sheet while maintaining the temperature of the steel sheet within the range not lower than a ductile-brittle transition temperature but not higher than a non-uniform deformation occurrence temperature. This cold rolling method is for performing a rolling process on a steel sheet S by means of a plurality of rolling stands std arranged in the conveying direction of the steel sheet S while supplying a rolling oil to each of the plurality of rolling stands std. The method comprises supplying at least a portion of the rolling oil recovered from a rolling stand std disposed on a downstream side in the conveying direction of the steel sheet S among the plurality of rolling stands std, to a prescribed number of the rolling stands std including the rolling stand std disposed most stream in the conveying direction of the steel sheet S.

The invention relates to the technical field of metal material stamping, in particular to a stamping forming quality control system and device for a wave washer. In the continuous periodic stamping process, a material belt is prone to being in an unstable oscillation state due to error accumulation, and the quality of the wave washer is affected. The method comprises the following steps: firstly, acquiring vibration time sequence data of each period and shearing mark depth data of a semi-finished product of a material belt; the vibration time sequence data are decomposed, target component signals are screened out to analyze vibration characteristics, and the deformation characteristic value of the material belt in each period is quantified. And in consideration of the mutual influence of adjacent periods, analyzing the frequency and phase difference of target component signals of adjacent periods to obtain a variable factor of the material belt, and describing the stamping amount needing additional compensation. And finally, the deformation characteristic value, the variable factor and the shear mark depth data are fused, the vibration influence of each period is evaluated, the stamping speed of the subsequent period is adjusted accordingly, and the problems of non-uniform shear marks, deformation and the like caused by the fact that the material strip is in an unstable state in the stamping process are solved.

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.

The invention provides a cold spraying device and a preparation method of an amorphous alloy coating. The cold spraying device comprises a Laval nozzle and a temperature compensation unit. The temperature compensation unit is used for heating the amorphous alloy powder between the expansion section and the matrix to realize temperature compensation; according to the preparation method of the amorphous alloy coating, in the deposition process, the amorphous alloy powder between the expansion section and the base body is heated through the temperature compensation unit so as to achieve temperature compensation, generation of a nanophase in the amorphous alloy powder is promoted, and the mechanical property and the like are improved; compared with a thermal spraying technology, a laser cladding technology or a laser-assisted technology, crystallization of the amorphous alloy can be avoided, and the excellent performance of the amorphous alloy can be kept in the coating; compared with a pure cold spraying technology, uniform deformation of the amorphous alloy powder can be achieved, the density of the amorphous alloy coating is improved, and therefore the advantages of the amorphous alloy coating in the fields of corrosion prevention, abrasion resistance and the like are fully played.

The invention discloses a magnesium alloy plate corrugated lining plate rolling method based on micro-grain regulation and control, and belongs to the technical field of plate rolling forming. The invention aims to solve the problems of high anisotropy, poor calendaring formability and the like of an alloy plate due to strong basal texture of the alloy plate due to formation of corresponding stress on the alloy plate surface and over-small range of a rubbing and rolling area during traditional magnesium alloy rolling. According to the rolling method additionally provided with the corrugated lining plate, the deformation resistance of external friction to the plate in the rolling process is reduced, the loading mode is converted into overall application from local application, and the grain size and distribution of the magnesium alloy plate are effectively controlled by regulating and controlling the diameter and period of the corrugated surface of the corrugated lining plate. And the stress state of the plate is changed, and non-uniform deformation and local dynamic recrystallization nucleation are promoted, so that grains are refined, the basal texture is weakened, and the quality and the overall performance of the rolled plate are greatly improved. The method is suitable for short-process rolling forming of the magnesium alloy plate.

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 present invention relates to the technical field of copper rod processing, and in particular to a method for controlling the rolling of an ultra-high-pressure copper rod, comprising the following steps: rolling the copper rod in a plurality of passes using a three-dimensional collaborative rolling mode, with the rolling direction of each pass forming a specified angle with the rolling direction of the previous pass; configuring a rolling roller with an adaptive surface correction module to compensate for a shape error of the copper rod caused by switching the rolling direction; by adopting the three-dimensional collaborative rolling mode, the uniformity of the internal grain structure of the copper rod is effectively improved, and the mechanical properties and electrical conductivity of the material are enhanced; the adaptive surface correction module configured with the rolling roller can dynamically compensate for the shape error caused by switching the rolling direction, and significantly improve the shape accuracy and surface quality of the copper rod; and by real-time detecting the deformation after each rolling pass and dynamically adjusting the rolling gap, the problem of uneven deformation is avoided, thereby ensuring the consistency of the product.

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 application provides a rolling forming method for a complete conformance streamline raceway of a tapered roller bearing, and belongs to the field of bearing preparation. A blank is designed according to the size of an outer ring of the tapered roller bearing, the size of a bar material for blanking is determined, the blank is obtained by blanking, and the height-diameter ratio of the bar material is controlled to be small during the blanking process. The intermediate material is obtained by upsetting the bar material according to the upsetting ratio, the upsetting ratio of the bar material is controlled to be small during the upsetting process of the bar material, the intermediate material is obtained by extrusion forming and stamping, the blank is punched to obtain a ring blank, the ring blank is rolled by using a full-closed pass to realize the conformance streamline forming of the raceway and obtain a final forging, and the rolling ratio is controlled to be large under the condition that a core roller can be put into the full-closed pass. The application considers the influence of the blanking process on subsequent blank making, designs the volume of the bar material and the blanking diameter, makes the height-diameter ratio of the bar material as small as possible, and reduces the radial flow of the bearing ring metal in this stage. The application considers the influence of the upsetting process on the metal flow in subsequent rolling, designs a reasonable upsetting ratio, makes the upsetting ratio as small as possible, and reduces the adverse influence of uneven deformation in the forging process on the metal streamline distribution.

The invention discloses a method for determining a uniform extension strain limit diagram of a thin plate, comprising pre-test processing, sample loading, strain identification point positioning, strain identification point strain output, strain-time curve drawing, non-uniform deformation critical moment determination, equivalent plastic strain calculation, true strain ratio fitting, uniform extension strain limit diagram drawing, repeating the steps to obtain (r, ε) of the remaining samples. eq ) and plotted in the FLD diagram; at the same time, the (r, ε eq ) take the average value (r, ε eq ) avg Plotted in the FLD diagram and connected. It conforms to the physical meaning of uniform and non-uniform deformation, rather than relying on experience or phenomenology to approximate, and more accurately characterizes the material properties; this method can evaluate the uniform deformation of the material including the strain path from the (-0.5,1) strain ratio, and the evaluation is more comprehensive, which can reflect the uniform deformation capabilities of different materials under different strain paths.

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 present invention provides a method for determining the surface deformation of a CFG pile composite foundation under reverse fault dislocation. Combined with the fault rupture mode in the site cover layer, a method for analyzing the site stress of the fault rupture zone and a calculation formula are given to solve the problem of calculating the deformation of a vertical reinforced composite foundation adjacent to or across a strong earthquake surface rupture zone in an actual engineering project. (1) Combined with the fault rupture mode in the site cover layer, determine the calculation range of the site's surface uneven deformation, 1, 2, 3, j...n; (2) Calculate the deformation D of the surface point j caused by the bedrock dislocation j ; (3) Calculate the deformation of the composite foundation under the load of the building itself#imgabs0#(4) Calculate the foundation deformation S when the soil of the composite foundation is broken due to strong earthquake dislocation jQ ; (5) Calculate the total deformation T of the surface at point j j The present invention provides a parameter basis for the anti-fracture design of composite foundations of buildings on engineering sites across fault rupture zones, and provides basic research data for the safe use and toughness requirements of buildings in strong earthquake rupture zones.

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 invention provides a method and a device for predicting the plane shape of a rolled medium plate. The method comprises the following steps: acquiring related process parameters and intermediate parameters in the rolling process of the medium plate; obtaining non-uniform deformation node coordinates of the head part and the tail part of the rolled medium-thickness plate based on the related process parameters and the intermediate parameters; on the basis of the related process parameters and the intermediate parameters, obtaining non-uniform deformation node coordinates of the rolled edge part of the medium-thickness plate; performing data fitting on the non-uniform deformation node coordinates of the head part, the tail part and the edge part to obtain a plurality of shape functions of a plane shape profile curve; and connecting the plurality of shape functions to obtain a complete plane shape profile curve of the rolled medium-thickness plate. According to the method, the complete profile curve of the plane shape of the rolled medium-thickness plate can be obtained by inputting the technological parameters, the rolled piece size and the equipment parameters in the rolling process of the medium-thickness plate, and therefore the change rule of the plane shape of the rolled piece in the rolling deformation process can be described more accurately.

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.