347 results about "Softening" patented technology

A viscosity reduction system includes: a dispenser including: an inlet configured to receive a fluid; an outlet configured to dispense the fluid onto a surface; and a flow channel that fluidly connects the inlet with the outlet; and a vibrating device that directly contacts the dispenser at one or more locations and that is configured to vibrate the dispenser and the fluid when power is applied to the vibrating device.

The invention relates to the technical field of machine learning, in particular to a rock and soil stability prediction method and system based on machine learning, and the method comprises the following steps: extracting shear stress, displacement and energy dissipation rate time series data, calculating the stress change rate of adjacent time steps, screening the stress increment sudden change period, and calculating the shear deformation gradient change rate. Mutation points in the strain direction are screened, and a key variable interval is obtained. According to the method, traditional analysis limitation is broken through by combining displacement-stress second derivative and energy dissipation rate cross validation, a hardening-softening conversion area is dynamically identified, multi-stage strain gradient differences are compared to establish a space-time correlation parameter system, and static and dynamic parameter conversion is realized by using a strain increment space gradient tracking technology; and quantitative mechanical interaction and energy dissipation collaborative analysis is carried out to describe a stress diffusion path, stress release characteristics and deformation gradient distribution are fused to construct a fracture principal direction multi-dimensional verification mechanism, and a microscopic fracture and macroscopic instability correlation model is established.

The invention discloses a Cu-Cr-Zr-TiB2 copper-based composite material and a preparation method and application thereof. A blank containing TiB2 particles is subjected to rotary forging to obtain a rotary forging piece, the rotary forging piece is subjected to primary aging treatment and then subjected to electric pulse drawing to obtain a drawing piece, and then the drawing piece is subjected to secondary aging treatment to obtain the Cu-Cr-Zr-TiB2 copper-based composite material. According to the Cu-Cr-Zr-TiB2 copper-based composite material prepared through the preparation method, the copper matrix is of a gradient structure with the surface layer being a nanocrystalline layer of 50-200 nm and the core part being fine grains of 0.5-1 micron, TiB2 particle reinforced phases are distributed in the copper matrix in a fibrous mode in the axial direction, and Cr / Zr nano precipitated phases are distributed in gaps of the TiB2 particle reinforced phases and in crystals of the copper matrix in a dispersed mode; therefore, the high-hardness, high-strength, high-conductivity, high-softening-temperature, excellent high-temperature performance and excellent arc extinguishing performance are achieved.

The invention discloses a multilayer co-extrusion heat-shrinkable film and a preparation method thereof, the film comprises an outer wear-resistant layer, a middle support layer and an inner functional layer, the thickness ratio of each layer is 1: 3: 1-1: 5: 1, the total thickness is 50-150 [mu] m, and the raw materials are prepared according to respective formulas. The preparation method comprises the steps of raw material preparation, melt mixing, die head extrusion, two-way stretching, water-cooling shaping, electronic crosslinking, aging treatment, heating softening and cold and hot shaping. The carbon nanotubes (CNT) and the h-BN nanosheets synergistically hinder crack propagation in the middle layer, so that the crack propagation resistance of the film is remarkably improved, the tensile strength, the thermal shrinkage rate and other properties are also optimized, compared with a traditional film, the comprehensive properties of wear resistance, high strength and high thermal shrinkage rate are achieved through interface collaborative design, meanwhile, the production cost is reduced by 20-30%, and the application prospect is wide. The method is suitable for food packaging, electronic device protection and other fields.

The invention relates to a continuous punch forming method of a high-hardness alloy thin-wall lock case in the field of intelligent manufacturing, which comprises the following steps: according to a stress distribution diagram, adjusting a die gap by adopting a self-adaptive algorithm, dynamically optimizing gap parameters for a local stress concentration area, and determining real-time gap configuration; if the temperature deviation of any area in the temperature field exceeds 10 DEG C, recalculating heat source distribution through a heat flow simulation algorithm, and determining optimized heating parameters; acquiring surface topography data of the annealed thin-wall lock case through an optical scanner, and analyzing fracture and wrinkling defects by adopting an image processing algorithm to obtain defect distribution characteristics; if the proportion of the fracture area in the defect distribution characteristics exceeds 2%, the forming failure probability is predicted through a neural network model, and whether the stamping speed is adjusted or not is determined; and according to the defect distribution characteristics and the softening consistency data, a data fusion algorithm is adopted to comprehensively evaluate the forming stability, and optimized operation parameters of the continuous stamping production line are obtained.

The invention relates to the technical field of motor shaft machining, in particular to a cold forging step-by-step extruding and stretching method for motor shaft preparation, which comprises the following steps: acquiring forward extrusion approximate average force, and calculating initial deformation resistance of a workpiece based on the forward extrusion approximate average force, obtaining a target parameter increment of a reverse extrusion process and an average inner diameter of a reverse extrusion target hollow part to determine a target volume deformation amount, and determining a process difficulty evaluation index based on the initial deformation resistance and the target volume deformation amount; the adjusting strength of the set value of the punching force is obtained, and the correlation between the process difficulty evaluation index and the follow-up process adjusting strength is determined based on the multiple adjusting strength of the current batch of workpieces and the process difficulty evaluation index; and in response to the correlation adjustment, determining a difficulty threshold of a difficulty state in which the workpiece is machined based on the process difficulty evaluation index. According to the invention, the stamping force and speed of the subsequent process are adaptively adjusted through the initial resistance and annealing softening effect of the material.

The invention belongs to the technical field of geotechnical engineering, and provides a stratified rock mass fracture expansion behavior model construction method, a stratified rock mass fracture expansion behavior model simulation method and system. The construction method of the fracture expansion behavior model in the stratified rock mass comprises the following steps: constructing a stratified rock mass near-field dynamic stress solving model based on a near-field dynamic non-local differential operator; the near-field dynamics non-local force density is deduced according to small deformation assumption, a near-field dynamics non-local differential operator is combined, an expression of the near-field dynamics non-local force density is reestablished, a softening criterion based on the strain energy density theory is introduced, and a stratified rock mass strain energy density softening model is constructed; based on the material mechanical characteristics of the interface between different rock stratums, a material mechanical parameter calculation model of the interface junction of the stratified rock mass is constructed; and combining the stratified rock mass near-field dynamic stress solving model, the stratified rock mass strain energy density softening model and the stratified rock mass interface junction material mechanical parameter calculation model to obtain a stratified rock mass fracture expansion behavior model.

The invention discloses a method for evaluating damage evolution of an underground structure under the action of a sudden explosion load, and relates to the technical field of civil engineering and engineering disaster prevention, and the method is characterized by comprising the following steps: S1, simulating the underground structure based on an explosion load, a geometric boundary and material parameters, and constructing a unified constitutive model; and S2, introducing a pressure-related strength criterion of a Dwark-Prasugrel criterion into the unified constitutive model so as to describe the influence of confining pressure on the shear strength. The technical problem to be solved by the invention is to provide the method for evaluating the damage evolution of the underground structure under the action of the burst explosion load, so that the key pain points such as pressure correlation, high strain rate effect, material random discreteness, damage softening energy consistency and the like are difficult to consider at the same time in the existing analysis method. A set of damage evolution evaluation method and implementation system which can be implemented from the material level to the structure level is established, and quantitative prediction and engineering grading judgment of the whole process of crack initiation, expansion to instability failure of the underground structure are supported.

The invention relates to the field of precision machining detection, and discloses a hydraulic shaft sleeve machining detection system and detection device which comprises a pneumatic servo control module, a signal collecting and processing module and a thermal inversion calculation module. The pneumatic servo control module drives the overturning air cylinder to apply a composite pressure waveform containing a static reference and a periodic flutter component to the hydraulic sleeve; the signal acquisition and processing module performs frequency domain analysis on a displacement signal detected by the displacement sensor and separates average displacement and displacement amplitude; the thermal inversion calculation module calculates real-time dynamic stiffness according to the displacement amplitude, a material stiffness thermal softening model is used for reversely deducing a temperature rise value, thermal expansion and elastic deformation errors are stripped through multi-dimensional error decoupling operation, and real height data under the standard temperature and without external force are calculated. According to the invention, active excitation and frequency domain analysis technologies are utilized, so that the interference of an oil film and thermal deformation is effectively solved, and high-precision online detection and processing compensation of a thermal-state workpiece are realized.

The invention relates to the technical field of optical element machining, in particular to an HUD free-form surface mirror machining method which comprises the following steps of S1, substrate selection and cutting, S2, edge treatment, S3, first-stage hot bending forming, S4, second-stage hot bending forming and S5, grinding. According to the machining method disclosed by the invention, through cooperative use of the first-stage hot bending forming and the second-stage hot bending forming, machining operation of the free-form surface mirror with the large size, the large curvature and the small thickness can be achieved; meanwhile, through the two-stage hot bending forming process, primary forming is conducted through first-stage hot bending forming, pressure maintaining is conducted near a softening point through second-stage hot bending forming, the glass is evenly heated and stressed, residual stress is effectively released, the surface type is promoted to present an ideal gradual change trend, edge distortion is greatly reduced, and the high-precision surface type of the final curved mirror is ensured.

According to the heat stabilizing method of the double-color injection mold, a phase change heat storage unit is arranged in the rotary double-color injection mold and embedded in an annular groove formed in the outer wall of a mold cavity on the movable mold side of the double-color injection mold; a phase change heat storage material is packaged in the phase change heat storage unit, and heat insulation layers are arranged on other outer surfaces of the phase change heat storage unit; the melting point of the phase-change heat storage material is lower than the softening point of the plastic material and higher than the demolding temperature of the plastic material; during first injection molding, a molten first material heated to a first high temperature is injected into the lower-layer mold cavity through a hot runner, and is cooled below the first low temperature to be cured; the phase-change heat storage unit absorbs heat of the mold cavity and starts to melt when the temperature rises to a first low temperature, and temperature rise of the mold cavity is delayed; during secondary injection molding, a molten second material heated to a second high temperature is injected into the upper-layer mold cavity; the phase change heat storage unit controls the temperature of the lower-layer mold cavity to be below the third temperature through latent heat absorption, and the first material is prevented from being softened. Temperature fluctuation of the mold can be balanced, and softening of the first injection molding material caused by sudden temperature drop is prevented.

The invention belongs to the technical field of thermal power heating surface treatment, and provides a boiler heating surface high-temperature corrosion protective coating and a preparation method thereof in order to solve the technical problems that in the prior art, a nano ceramic coating and a metal alloy coating for treating thermal power boiler heating surface high-temperature corrosion are insufficient in adhesive force, prone to falling off and short in protection service life. Through multi-layer structure design and technological parameter optimization, a coating system has continuous thermal expansion coefficient gradient distribution in the interval of 500-900 DEG C, the metal bonding layer at the bottom layer has a pore structure which can effectively absorb thermal stress, the nano ceramic layer at the surface layer can maintain high-temperature stability, and it is verified that the overall bonding strength is larger than or equal to 35 MPa, and the thermal expansion coefficient is larger than or equal to 10%. Compared with a traditional single-layer coating, the adhesive force is improved by 200% or above, and therefore the technical problems that in the prior art, adhesive force is insufficient, thermal stress is not matched, and high-temperature softening fails can be effectively solved.

The invention relates to a high-temperature-resistant pressing plate for a slab continuous casting flame cutting machine and a preparation method, and belongs to the technical field of special alloy materials and continuous casting equipment. The high-temperature-resistant pressing plate comprises the following chemical components in percentage by mass: 0.03%-0.04% of C, less than or equal to 0.75% of Si, less than or equal to 2.0% of Mn, less than or equal to 0.045% of P, less than or equal to 0.03% of S, 16.5%-17.5% of Cr, 12.5%-13.5% of Ni, 2.8%-3.2% of Mo, 0.4%-0.6% of Ti, 0.003%-0.005% of B and the balance of Fe and inevitable impurities. Wherein the mass fraction ratio of Ti to C is 8-10. Through the synergistic effect of component optimization, phase structure regulation and control and the preparation process of the high-temperature-resistant pressing plate, the high-temperature performance and stability of the high-temperature-resistant pressing plate are remarkably improved, the service life of the high-temperature-resistant pressing plate is remarkably prolonged, and therefore the technical problems of high-temperature softening deformation, insufficient material service life and the like of a traditional pressing plate are solved.

The invention discloses a high-heat-resistance and high-conductivity copper alloy and a preparation method and application thereof. The copper alloy comprises 0.001 wt%-0.01 wt% of Ag; the content of P is 0.0005 wt%-0.002 wt%; 1 wt%-0.008 wt% of X1 and the balance Cu and impurities, wherein X1 is Sn and Zr; and the addition mass ratio of Sn, Ag and Zr, namely [Sn] / [Ag + Zr], is 0.5-2. The preparation process of the high-heat-resistance and high-conductivity copper alloy comprises the steps of smelting, casting, continuous extrusion, solid solution treatment, drawing, low-temperature annealing, sizing and packaging. The preparation method comprises the following steps: proportioning and smelting according to the mass percent of each element of the copper alloy; and in the low-temperature annealing process, the annealing temperature is 150-350 DEG C, and the heat preservation time is 2-10 h.

The invention provides a rapid demolding method and system for a deep inner buckling position of an injection mold. The rapid demolding method comprises the following steps that a plastic part three-dimensional model is constructed through CAE mold flow analysis software, a deep inner buckling position area is recognized, an optimal demolding path is simulated, and a process database is generated. According to the invention, traditional mechanical core-pulling mechanisms such as pitched roofs and sliding blocks are abandoned, and a multi-physical field cooperation mode of air pressure assistance, ultrasonic vibration and intelligent temperature control is adopted, so that the mold structure is simplified, complex transmission components are reduced, the mold manufacturing cost is reduced, and the maintenance difficulty is reduced; the demolding parameters are dynamically regulated and controlled through the LSTM neural network, the demolding stroke is shortened in combination with the multi-field synergistic effect, the production period is remarkably shortened, and the large-scale automatic production requirement is met; through the local temperature field reconstruction softening material, the multi-dimensional force field dispersion demolding force and the residual stress elimination treatment, the stress concentration of the buckling area of the plastic part is reduced, the strain and deformation rate is reduced to 0.5% or below from 5%-8%, and the product yield is greatly improved.

According to the rolling device and method for multi-step incremental forming of the ultra-high-strength plate, through cooperative finishing of laser local heating and a small fillet forming roller, the minimum forming fillet radius of the ultra-high-strength plate can be compressed to be smaller than or equal to 2T (T is the thickness of the plate) from R larger than or equal to 3T in traditional cold rolling; while the design freedom degree and the structural performance of the part are remarkably improved, the cold hardening high-strength state of a non-heating area is precisely kept, and the overall softening defect caused by a hot stamping process is thoroughly avoided; and as the forming force mainly acts on the local softening area, the required forming force is obviously reduced, and meanwhile, the springback of the softening area can be effectively inhibited, so that the size precision and the shape stability of the small fillet are ensured. The device serves as an independent unit and can be conveniently integrated at the tail end of an existing rolling line, subversive transformation of the whole production line is not needed, and high economical efficiency and practical value are achieved.

To provide a busbar electric wire that allows insulation to be maintained for a certain period of time or longer even under high-temperature conditions and enables reduction of breakage risk during forming processing while retaining manufacturability.SOLUTION: A busbar electric wire 1 includes: a metal busbar 10 formed in a flat shape from pure copper; and an insulator 20 covering the metal busbar 10. The insulator 20 has: a silicone resin 21 serving as a main component; and a fire-resistant filler 22 composed of a substance having a second softening point higher than a first softening point, the first softening point being a softening point of the silicone resin 21. The tear-strength / density is 11.5 kN cm3 / m g or more and 23.0 kN cm3 / m g or less, and a residual amount after combustion in heating exceeding the first softening point and below the second softening point is 36 wt.% or more relative to before combustion.SELECTED DRAWING: Figure 2

A kind of titanium alloy plate local heat / electricity / ultrasonic multi-field coupling assisted progressive forming device and its use method, relate to a kind of titanium alloy plate progressive forming device and its use method.The present application is to solve the technical problems of the existing titanium alloy plate progressive forming method relatively slow heating speed, high energy consumption, poor product quality.The device of the present application realizes two-stage heating by local non-contact heating and pulse current self-resistance heating, improves the heating rate, improves the material plasticity by the "electroplasticity" effect generated by pulse current, reduces the material deformation resistance by the "ultrasonic softening" effect generated by ultrasonic field, improves the formability, and improves the forming quality by multi-field coupling.The present application realizes the reduction of material deformation resistance and plasticity by the coupling of heat, electricity and ultrasonic multi-energy field in the deformation process of sheet metal, and significantly improves the formability of material.

The invention relates to a saturated granular material liquefaction deformation calculation method based on a state evolution model, which comprises the following steps: establishing a saturated granular material liquefaction state evolution model, and setting a state parameter representing system fluidity in the state evolution model as a weighted average value of a historical strain rate function and an excess pore water pressure change rate function; analyzing and determining a shear strain time travel curve, a stress strain curve and a state parameter evolution curve according to the state evolution model; and carrying out saturation granular material liquefaction discrimination according to the state parameters. According to the saturated granular material liquefaction deformation calculation method based on the state evolution model, the Davidenkov model and the unified softening model are introduced to describe shear modulus softening, the liquefaction deformation calculation method is provided, and finally the accuracy of the calculation method is verified through a series of experimental data and simulation data.

The invention belongs to the technical field of ultra-precision machining, and discloses a constant-energy laser-assisted curved surface machining method and system.The method comprises the steps that the inclination angle between a laser beam and an incident plane is adjusted, and the laser beam is made to be emitted out of the front tool face of a diamond tool; based on the curved surface machining cutting track, the acting position of a diamond cutter arc in each machining site is determined, and the laser beam offset distance is obtained; laser focus position compensation is conducted based on the laser beam offset distance, so that any machining site obtains laser assistance; a mapping relation model between the laser power and the material softening temperature corresponding to different machining sites is obtained through simulation; acquiring actual laser power required by all processing sites based on the mapping relation model; and according to the actual laser power, all the machining sites of the to-be-machined area are sequentially subjected to laser-assisted machining. By means of the method, the effect of improving the surface quality and surface shape precision of machining of the hard, brittle and difficult-to-machine material curved surface optical element can be achieved.

Materials comprising a protective coating for thermal protection are disclosed herein. The protective coating is comprised of a sacrificial layer, sacrificial component, or an intumescent layer organized in diverse geometries bioinspired from the thermal resistant structures in pyrophytic plants from the Banksia genus. The protective coating can be applied to various substrates and used for thermal management, water rescue, or crash safety.

The present invention relates to a method for testing and judging the performance of a laser local soft zone, comprising step S1, a sampling step, sampling from a thermoformed part to obtain a laser local soft zone sample to be tested; step S2, a sample processing step, cutting the laser local soft zone sample to obtain a surface to be tested; step S3, a hardness testing step, performing a hardness test on the surface to be tested; step S4, a data analysis step, drawing a hardness distribution curve, and judging whether the soft zone performance of the surface to be tested meets a specified standard. The method of the present invention is simple and highly reliable. Through the above steps, a hardness test is performed on the laser local soft zone sample to be tested, and by analyzing the data obtained from the hardness test, whether the performance of the laser soft zone meets the standard is judged, and then whether the laser softening process is normal is judged. It can also serve as a reference and guide in the subsequent adjustment of the laser softening parameters.

The invention discloses a sample holder for a thermal deformation vicat softening temperature determinator, and belongs to the technical field of thermal deformation vicat softening temperature determinator testing, the sample holder comprises a sample holder main body and a span-adjustable sample support, the sample holder main body comprises a sample holder upper plate and a sample holder lower plate, the sample holder upper plate and the sample holder lower plate are connected through two stand columns, a sample support base plate is installed on the upper surface of the sample holder lower plate, two sets of different sample support pieces are arranged on the sample support base plate, and sample blocking pieces are installed at the two ends of the sample support base plate. According to the invention, three groups of sample holders are combined together; when a conventional sample test is carried out, the sample is longitudinally placed, and when a large-span test needs to be carried out, the longitudinally placed sample can be transversely placed, so that the test requirement is met; according to the sample holder, the number of parts is reduced, meanwhile, the installation time is synchronously shortened, the problems that traditional equipment is limited in span, high in cost, tedious in operation and the like are solved, and the adaptability and practicability of a testing system are remarkably improved.

The utility model discloses a kind of polyacrylamide low-temperature crushing equipment, it is related to the field of crushing equipment, including installation fixed plate, driving motor, blade shaft and crushing blade, the driving motor is fixedly installed in the rear end of installation fixed plate, the blade shaft is movably installed in the front end of installation fixed plate, multiple the crushing blade is fixedly installed in the outside of blade shaft.The utility model can forcibly make external air blow into the inside of crushing cover through air guide duct, the airflow not only significantly reduces the friction heat in the crushing process, avoids polyacrylamide because of high temperature softening or caking, but also can be dispersed by airflow disturbance Material is fully dispersed, improve crushing uniformity, fan shaft and blade shaft are directly linked, without additional power source, just through driving motor can synchronous drive crushing and air supply function, greatly reduce energy consumption, simplify equipment structure, while continuous airflow can prevent the fine powder after crushing in rotating discharge pipe accumulation, ensure that discharge is unobstructed.

The invention discloses a method, system and equipment for optimizing the temperature of a hot bending station mold and a storage medium, belongs to the technical field of glass hot bending forming, and solves the technical problem that the temperature optimization efficiency of the station mold is low. The method comprises the following steps: step 1, constructing a calculation model for calculating the mold temperature of each work station; step 2, inputting the comprehensive coefficient K of each work station mold and the work station beat CT into a calculation model; step 3, inputting the temperature set value of each work station mold into the calculation model to obtain the predicted temperature reached by each work station mold; 4, judging whether the predicted temperature of the last station of the preheating work station reaches the softening point temperature of the glass or not; 5, if not, adjusting the temperature set value of the previous preheating work station, and executing the step 3; otherwise, executing the step 6; and step 6, outputting the optimized temperature set value of each work station mold. The temperature of the work station mold can be automatically calculated and evaluated only by setting the temperature and the CT of each work station, the efficiency of parameter optimization is greatly improved, and the method is visual, rapid and accurate.

This invention discloses a co-curing molding process for large composite material U-shaped stiffened wall panels, including skin panel laying, stringer laying, first tweezer filling, stringer flipping and positioning, intercalation laying, second tweezer filling, stringer cavity laying, curing soft mold laying, soft mold limiting, pressure curing, and demolding. The stringer laying uses a complete composite soft mold as the male mold, achieving dual-purpose use of one mold. During curing, a combination of a complete composite soft mold and split soft molds is used. The complete composite soft mold serves as the main mold, with a thicker thickness and greater vertical edge rigidity. The cooperation between the complete composite soft mold and the soft mold limiting prevents softening and sinking of the vertical edges, thus solving the problem of straightness in the vertical edge length direction. The split soft molds serve as pressure equalizing plate molds. The pressure applied during curing in an autoclave transfers vacuum bag pressure to the split soft molds, and the moving extrusion provides pressure to the vertical edges and radius corners, causing the tweezers and intercalations to return to their theoretical positions under the curing extrusion action, ensuring no damage or problems.

The invention relates to the technical field of packaging cartons, in particular to a corrugated carton design method which comprises the following steps: S1, calculating and determining the angle value of each folding point by using a specific mathematical model according to the stability requirement of multi-layer stacking; s2, regulating and controlling the thickness and position of an internal partition material based on the angle determined in the previous step according to the protection performance requirements of fragile articles in transportation; s3, according to the softening and deformation problems in the high-humidity environment, selecting a proper coating material type and accurately distributing the coating material at the key part; and S4, determining an outer layer treatment scheme, a printing ink formula and drying time based on the optimization results of the previous steps, and adjusting a sealing mode to match the speed and strength requirements of an automatic packaging line. The damping and buffering capacity of the whole container on the vibration or shaking effect caused by external disturbance factors is improved by accurately adjusting the internal supporting assembly and the gap arrangement, and meanwhile reasonable distribution of the internal space is guaranteed, so that the fragile products are effectively protected.

The invention relates to the technical field of manufacturing of electrical insulating materials, and discloses a method for determining a softening breakdown test temperature of a 200-level direct-welding enameled winding wire, which comprises the following steps of: a) performing a softening breakdown test of preset temperature steps on an enameled wire sample, keeping the temperature of each step for a constant time, and recording the breakdown condition of the sample; b) counting the breakdown ratio at different temperatures, and determining a main breakdown temperature interval with the breakdown rate greater than or equal to 80%; c) adding a safety margin temperature to the lower limit temperature value of the main breakdown interval to obtain a softening breakdown test temperature; d) verifying by thermogravimetric analysis that the temperature of the cut-through test is at least 20 DEG C lower than the starting temperature of thermal decomposition of the material; 5 DEG C is used as a stepping step of the temperature step. Through stepped temperature rise, statistical analysis and thermal decomposition temperature verification, the softening breakdown test temperature of the enameled winding wire is accurately determined, and the accuracy and reliability of a test result are ensured.

The application discloses a pencil plate wax immersion softening device for pencil production and a production process thereof and belongs to the technical field of pencil manufacturing, which comprises a base, the upper ends of the base are fixedly connected with limiting rings on both sides, the interiors of the two limiting rings are rotationally connected with a roller in common, the left side of the roller is provided with a driving assembly, the right side of the roller is rotationally connected with a cover plate, the interior of the roller is fixedly connected with an air pressure changing assembly, and the air pressure changing assembly can change the air pressure in the roller. When the piston plate moves leftwards, the air pressure on the right side in the roller is reduced, which is helpful to sucking out the bubbles mixed in the pencil plate; when the piston plate moves rightwards, the air pressure on the right side in the roller is increased, which can exert pressure on the wax oil and forcibly push the wax oil to penetrate into the pencil plate. The periodic change of the air pressure effectively solves the problems of bubble residue and insufficient penetration in the traditional wax immersion process, and significantly improves the wax immersion softening effect and uniformity of the pencil plate.

This invention proposes a metal matrix composite material processing apparatus and method based on plasma etching, belonging to the field of composite material processing. It determines the material properties, target processing method, and final service performance requirements of the metal matrix composite workpiece. The workpiece consists of a metal matrix and reinforcing particles dispersed within the metal matrix. The area to be processed on the workpiece is exposed to a plasma jet, and plasma etching is used. The reinforcing particles react and transform into volatile gases, which are then removed from the metal matrix, forming a softening pretreatment layer on the workpiece surface. Ultrasonic vibration cutting is then used to remove the softening pretreatment layer. This invention removes the reinforcing particles from the metal matrix through plasma etching, locally transforming the originally heterogeneous and difficult-to-process composite material into a relatively homogeneous metal layer for cutting. This achieves homogeneous transformation of the processed object, eliminating the core mechanisms of particle pull-out, breakage, and interface cracking in traditional processing.