26 results about "Grinding test" patented technology

The utility model discloses a grinding type coal rock gas generating device which comprises a box body frame, and a lifting supporting unit, a grinding driving unit, an upper clamping unit, a lower clamping unit, an upper grinding convex rod, a lower grinding concave rod, a middle clamping unit, a gas collecting unit and a temperature control unit are arranged in the box body frame. The coal rock grinding device is scientific in principle, simple in structure, easy to install and good in sealing performance, coal rocks are ground in a sealed environment, meanwhile, temperature control in the grinding process is achieved, and therefore the accuracy of coal rock grinding test data is improved, gas generated in the coal rock grinding process can be collected, and the coal rock grinding efficiency is improved. Therefore, a reference basis is provided for researching the abrasiveness of the coal rock.

The invention provides a hard and brittle material subsurface damage mechanism signal classification method based on an acoustic emission technology. The method comprises the following steps: firstly, acquiring an acoustic emission original signal and surface appearance of the hard and brittle material through grinding tests at various grinding speeds; then, carrying out preprocessing and time-frequency domain feature extraction on the acoustic emission signals by using a wavelet packet signal processing algorithm and short-time Fourier transform; finally, distinguishing a micro-crack signal, a radial crack signal and a transverse crack signal from the characteristic space by combining the damage characteristics and acoustic emission characteristic parameters of the hard and brittle material, and obtaining a characteristic frequency band range corresponding to each crack damage mode; a hard and brittle material subsurface damage mechanism signal classification model is constructed, and a theoretical basis is provided for monitoring of grinding subsurface damage of hard and brittle materials under complex working conditions. According to the method, the damage mechanism of the hard and brittle material can be quickly identified, the subsequent online evaluation of the subsurface damage of the hard and brittle material is realized, and the technical problem of non-destructive accurate monitoring in the grinding process is solved.

This invention relates to the field of building material ceramic performance testing technology, specifically a method and application for testing the wear resistance of glaze surfaces, comprising the following steps: S1, cutting out the glazed area as a sample, washing it, and drying it to constant weight; S2, pre-test photography: determining the measurement area on the sample, observing and photographing the measurement area using a microscope, and obtaining the initial dark area ratio η0 of the measurement area using image processing software; S3, grinding test; S4, sample post-treatment: after reaching the pre-adjusted rotation speed n, removing the sample, cleaning it, and drying it to constant weight; S5, post-test photography, obtaining the dark area ratio η of the measured area surface after grinding. n S6. Calculate the wear area ratio Δη of the measurement area, plot Δη against the grinding revolution number n, and take the lowest value among the grinding revolutions corresponding to the wear area ratio Δη reaching 33.3% or above as its wear resistance revolution number, so as to solve the problem that the current test of the wear resistance of glaze is difficult to quantify and has a large human error.

The invention discloses grinding wheel testing equipment, which relates to the technical field of grinding tool testing and comprises a testing table, a tool clamping device and a grinding device. When a grinding wheel grinding test is carried out, the vertical distance between the grinding wheel set and the tool clamping device is adjusted, then a workpiece to be ground is guided to the first clamping assembly through the second clamping assembly, and after the first clamping assembly clamps one side of the workpiece to be ground, the second clamping assembly tightly presses the other side of the workpiece to be ground. Then the first sliding part is driven to slide at a constant speed from one end of the test board to the other end of the test board, and the fixed workpiece to be ground is ground through a grinding wheel set rotating at a constant speed; the feeding amount of a workpiece to be ground can be adjusted by adjusting the distance between the first clamping assembly and the second clamping assembly and adjusting the vertical distance between the grinding wheel set and the tool clamping device, and different grinding working conditions can be simulated by adjusting the rotating speed of a grinding wheel and the sliding speed of a first sliding piece. Therefore, working condition simulation on a real working production line of the grinding wheel can be completed.

The application provides a high-efficiency spiral flute tap batch grinding method based on a non-dominated sorting genetic algorithm (NSGA-II), which can accurately realize tap consistency grinding and improve efficiency. First, the wear and diameter change law of a forming grinding wheel is established based on an actual grinding condition; second, a forward calculation method improved based on an engagement principle is used to calculate a tap radial flute type according to a normal section type of the grinding wheel; then, the flute type corresponding to the grinding wheel in different wear and diameter states is calculated to establish the influence law of the grinding wheel wear on the flute type; the influence law of the grinding wheel wear on the flute type is verified through a grinding test and a Canny operator visual recognition; finally, the NSGA-II algorithm is used to optimize a grinding wheel clearance angle, eccentricity and inclination angle combination, and the accuracy of the algorithm is verified through a test. The application belongs to the field of mechanical engineering.

The invention discloses a GH4169 matrix NiCrAlY coating single crystal corundum grinding wheel grinding parameter optimization method. The method comprises the following steps that S1, experimental equipment and a grinding test piece are determined; s2, determining the model and process parameters of the grinding wheel; s3.1, a dissimilar material grinding size experiment is carried out; s3.2, a grinding surface roughness test is carried out; s4, performing comprehensive analysis on an experiment result by using an orthogonal experiment method; s4.1, the range of the difference value delta is analyzed; s4.2, carrying out range analysis on the surface roughness Ra; s5, performing experimental verification and contrastive analysis before and after optimization to obtain optimal parameters: the feeding speed of the grinding wheel is 8mm / min, the rotating speed of the grinding wheel is 2500r / min, and the grinding depth is 3mu m; by establishing a white corundum / single crystal corundum contrast grinding experiment system for synchronously grinding dissimilar materials of a spraying layer and a high-temperature alloy matrix, the grinding efficiency of the single crystal corundum grinding wheel is higher, and the surface quality and the dimensional precision are higher.

The invention discloses a blade tip grinding method for a long and short composite blade, which is used for grinding a blade tip of a blade disc with a long blade and a short blade, an overlapping part exists on the blade tip of the short blade adjacent to the long blade, and the method comprises the following steps of: mounting the blade disc on a rotary table of a five-axis machine tool; an angular reference is determined through the preset line position of the index plate, and the angles of the long blades and the short blades are located; the position of the first grinding wheel is adjusted, so that the rotating center line of the first grinding wheel is parallel to the blade tip contour lines of the long blade and the short blade, and the blade tip of the long blade and the blade tip of the non-overlapped part of the short blade are sequentially ground; and finally, the second grinding wheel is used for grinding the overlapped part on the short blade. By means of the method, grinding machining of the blade tips of the blade discs of the long and short composite blades can be achieved, the machining precision is high, the strict requirement of aero-engine blades for the dimensional tolerance of the blade tips is met, a blade tip collision-grinding test is conveniently carried out, and control over the gaps between the blade tips and a cartridge receiver is facilitated.

The application relates to a microsphere grinding method and device based on a reverse variable-speed drive, wherein the method comprises the following steps: determining the working conditions and structural parameters of simulation and test microsphere grinding, establishing a topological model of a simulation object, and importing the topological model into a dynamics simulation software; simulation calculation is performed by using the dynamics simulation software, related data of the microspheres are obtained by comparison simulation, and whether the microsphere revolution collision phenomenon exists in the simulation result is judged; if the microsphere revolution collision phenomenon exists, a time-varying driving speed function is traced back, the time-varying driving speed function is applied to actual microsphere grinding test, finally, when the preset relatively stable revolution running conditions among the microspheres are met, a corrected time-varying function is derived, and the corrected time-varying function is applied to actual variable-speed grinding. Therefore, the problem that due to the fixed eccentricity of the grinding disc, the revolution speeds of the microspheres at different positions are different, and when multiple microspheres grind at the same time, the microspheres are prone to collision, thereby causing surface defects and size deviation and the like is solved.

The invention relates to an ore grinding medium type selection method based on capture area evaluation, and belongs to the field of ore grinding in ore dressing. The method comprises the following steps: calculating theoretical kinetic energy of a target grinding machine when the target grinding machine drops according to the mass of the grinding medium of the target grinding machine, the distance from the center of the medium to the center of the target grinding machine to the target grinding machine and the rotating speed of the target grinding machine per minute; a laboratory is constructed to simulate impact and quantify the capture area, the theoretical kinetic energy A serves as the reference, a pressure testing machine is used for acting on a medium, the impact of the medium on the standardized ore charge layer is simulated, and the capture area is quantified through the image processing technology; capturing area data of various media under different energies are obtained through stepped energy testing, and the media with the better capturing area are selected as the optimal ore grinding media through comparison. According to the method, quantitative measurement of the'capture area 'of the ore grinding medium is achieved, the problems of blind model selection, high cost and long period of a traditional ore grinding test are solved, and rapid, low-consumption and accurate medium model selection is achieved.

The utility model discloses a diamond edging wheel machining jig which comprises a working table, limiting grooves and diamond grinding wheels, the top face of the working table is provided with a plurality of limiting grooves distributed at equal intervals, the diamond grinding wheels are arranged on the upper surface of the working table, a limiting mechanism is arranged on the upper surface of the working table, and the diamond grinding wheels are located on the surfaces of the limiting mechanism. The limiting mechanism comprises a base, a rotary table, a supporting column, a connecting frame, a hydraulic rod, a pressing head and a limiting block, the base is arranged on the top face of the workbench, an inserting block matched with the limiting groove is arranged on the bottom face of the base, a first rotary supporting piece is arranged on the top face of the base, and the top face of the base is rotationally matched with the rotary table through the first rotary supporting piece. Through the arrangement of the device, the diamond grinding wheel can be limited and kept in a rotating state in the grinding test process after being machined, and the device is simple in structure and facilitates limiting of each diamond grinding wheel needing to be machined and tested.

This invention relates to the field of trial grinding technology for multi-axis grinding wheels, and discloses a test grinding piece and working method for test grinding of grinding wheels, including a clamping rod, a positioning base, and a bar stock; the clamping rod is mounted on a CNC grinding machine, and the positioning base is located at one end of the clamping rod; the bar stock includes at least one piece, which is mounted on the positioning base and forms a certain angle with the surface of the positioning base; the bar stock includes at least one end face to be ground. This invention enables the test grinding piece to meet the test grinding requirements at various test grinding points without repeatedly changing the test grinding piece and test grinding process, improving the versatility of the test grinding piece and the test grinding process, while reducing grinding volume, increasing material utilization, reducing production costs, avoiding deformation of the grinding wheel, and ensuring grinding accuracy.

The application relates to a kind of acetabulum grinding tool test system and method.The acetabulum grinding tool test system includes test tool and test component arranged in the test tool;The test tool includes driving assembly, force sensor and grinding tool, the driving assembly drives the force sensor or the grinding tool moves;The test component includes acquisition component and reproduction component, wherein the acquisition component is used to acquire force information when simulating real acetabulum grinding in acquisition state, and the reproduction component is used to reproduce the force information in reproduction state;By acquisition component, the stress data during actual grinding is acquired, and subsequent grinding test is carried out using reproduction component with relatively small friction, to reduce consumable consumption and reduce test cost.

The utility model discloses an automatic gear running-in test device for a transmission, and belongs to the technical field of transmission manufacturing. The positioning piece is connected to the bottom plate; the swing mechanism is hinged in the positioning piece, and the swing mechanism is connected in the positioning piece in a sliding mode; the elastic stop piece is arranged in the positioning piece; during testing, the transmission is locked on the bottom plate, the gear shifting arm extends into the transmission, the swing mechanism is pushed to slide on the positioning piece, so that the position of the gear shifting arm is changed, different gear shifting positions in the transmission are aligned, and the elastic stop piece abuts against the swing mechanism to limit the freedom degree of the swing mechanism in the sliding direction. The cylinder assembly stretches out and draws back to enable the push-pull rod universal joint to act on the swing mechanism to swing, swing of the swing mechanism is converted into reciprocating swing of the gear shifting arm, then the gear shifting arm pokes the transmission to conduct running-in, the running-in efficiency is high, the labor intensity is reduced, and the running-in quality is good.

The present application provides a kind of grinding device, including grinding pad and grinding table, grinding pad is placed on grinding table, grinding table drives grinding pad synchronous rotation;Wafer to be processed, wafer to be processed needs to carry out the grinding of metal structure;Wafer fixing device, for fixing wafer to be processed;Grinding dresser, grinding dresser includes substrate, substrate is provided with isolation layer and protruding abrasive particles, substrate is also formed with the metal ion supplement structure of the same material of metal structure, it is used for grinding platform to be in idle state or grinding test wafer, to grinding pad is ground to maintain its roughness, and simultaneously grinding metal ion supplement structure generates metal ion;Abrasive nozzle, for spraying grinding fluid and / or pure water.The present application ensures that new metal ions are always generated on the grinding dresser, the overall environment remains consistent, so that the chemical reaction is always in a stable state, and the product piece always maintains a high and stable grinding rate during the grinding process.

The utility model discloses a semi-automatic clamping tool grinding device for grinding a metal test piece. The semi-automatic clamping tool grinding device comprises a belt sander, a clamping tool device arranged on the belt sander, an operation table arranged below the clamping tool device, and a counterweight weight and a power supply control box which are arranged beside the operation table, the belt sander comprises a sanding belt surrounding the sanding disc, a sanding belt shell wrapping the sanding belt, a driving motor arranged below the sanding belt, a driving wheel and a driven wheel arranged beside the driving motor, a belt surrounding the driving wheel and the driven wheel, and a fixing frame supported below the belt sander. The clamping tool device comprises an iron rod and a clamping tool arranged below the iron rod; wherein the iron rod is obliquely arranged on the column, the lower portion of the other end of the iron rod is installed on the clamping tool, and when not in use, the iron rod is placed on the operation table and when in use, the iron rod is moved to an abrasive belt of the belt sander. According to the utility model, the potential safety hazard caused by the fact that the hand is in close contact with the abrasive belt in the traditional hand-grinding test piece mode can be reduced; in addition, potential quality hazards caused by operation differences of workers can be reduced.

The utility model relates to the technical field of running-in test tools, in particular to a flexible joint test tool capable of eliminating concentric errors. The tool comprises a tool body which is hollow inside, the tool body is arranged in an L shape, one end of the tool body is connected with an assembly input end through a mounting disc, and the other end of the tool body is connected with a test bed through a connecting spigot; the tool body comprises a positioning spigot, a spline housing and a flexible joint, the flexible joint is located in the positioning spigot, and the flexible joint is arranged in a hollow column shape; a motor shaft at the input end of the assembly extends to the flexible joint from the mounting disc, and the spline housing extends to a conical hole of the flexible joint from the middle part of the tool body; and the motor shaft and the spline housing are concentrically arranged through the flexible joint. According to the utility model, the motor shaft and the spline housing are concentrically arranged indirectly through the flexible joint, so that the rigid contact between the motor shaft and the spline housing is avoided, the occurrence of collision damage is fundamentally prevented, and the spline housing with higher cost is protected.

This invention relates to the field of inspection and control technology, and discloses an inspection and control method for adjusting the gradation of steel balls. The method includes: obtaining a set of target gradation ratios for grinding media; obtaining target bulk density and porosity characterization values; determining the initial gradation ratio; conducting multi-time-dimensional grinding tests on the initial gradation ratio using a proportionally scaled-down mixture under experimental-grade negative pressure conditions in an experimental-grade grinding equipment, obtaining a multi-stage sieve residue data sequence; extracting industrial-grade negative pressure parameters of the industrial-grade grinding equipment during actual operation, and calculating a dynamic grinding compensation factor; performing nonlinear correction on the multi-stage sieve residue data sequence based on the dynamic grinding compensation factor, and determining the optimal grinding media gradation strategy based on the corrected grinding efficiency evaluation index. This invention improves the accuracy of steel ball gradation inspection and the stability of grinding efficiency and product quality.

This invention claims protection for a device and method for testing grinding discs under various working conditions. The device includes a robotic arm, a drive motor, a fixture, and a material control mechanism. The end effector of the robotic arm is connected to the drive motor to control its posture. The drive motor is connected to the fixture to connect the grinding disc to be tested and to drive the grinding disc to generate different rotational speeds. The material control mechanism is connected to the material to be ground, which is cylindrical. The material control mechanism controls the rotation of the material about its axis, and the robotic arm controls the grinding disc to perform grinding tests on the annular end face of the material. This application uses a robotic arm to control the pressure, angle, and simulate human hand movements of the grinding disc acting on the material, making it easier to simulate manual grinding conditions. By using the forward and reverse rotation of the cylindrical material instead of the reciprocating motion of the grinding disc, the volume of the grinding material used is smaller, and the entire testing device occupies a smaller area.

This utility model discloses a jig for grinding test pieces, relating to the field of metal sheet grinding devices. Its features include a clamping body and a quick-release screw mounted on the clamping body. The clamping body is composed of a first L-shaped plate, a second L-shaped plate, and a hinge, which cooperate to form an opening at the bottom for clamping the test piece. One end of the quick-release screw passes through the first L-shaped plate and the second L-shaped plate and is threaded with a nut; the other end has an eccentric handle. This utility model has a simple structure and is easy to manufacture. The quick-release screw on the clamping body allows for quick clamping and disassembly of the test piece, avoiding direct contact between the hand and the standard metal test piece. This significantly reduces friction and wear on the hand, facilitates long-term operation, improves the efficiency of test piece grinding, reduces labor intensity, improves grinding quality, and ensures the accuracy of rust-preventive grease corrosion resistance testing.

The present invention provides an angle grinder performance testing apparatus and method. The apparatus comprises: a tooling support having two support columns arranged opposite one another; a suspension beam positioned between the two support columns, two ends of the suspension beam being slidably connected to the support columns, respectively; a resilient connecting member, one end of the resilient connecting member being connected to the tooling support, and the other end of the resilient connecting member being connected to the suspension beam, and the resilient connecting member being configured for resiliently suspending the suspension beam from the tooling support; a securing component provided on the suspension beam and configured for securing an angle grinder to the suspension beam; and a counterweight block configured for applying a set weight load to the angle grinder. The present application ingeniously designs a suspension apparatus such that a balanced state is achieved between the combined weight of an angle grinder and the suspension apparatus and the upward tension of a resilient connecting member, so as to offset the self-weight of the angle grinder, with force then being applied to the angle grinder by means of a counterweight block, thereby accurately simulating a grinding test involving manually applied force. The apparatus accurately controls the magnitude and angle of applied force, allowing for accurate test results and convenient, safe, and efficient operational use.

The application provides a signal classification method for sub-surface damage mechanism of hard and brittle materials based on acoustic emission technology. Firstly, the original acoustic emission signals and surface topography of the hard and brittle materials are obtained through grinding tests at multiple grinding speeds. Then, the wavelet packet signal processing algorithm and the short-time Fourier transform are used to pre-process the acoustic emission signals and extract time-frequency domain features. Finally, the micro-crack signals, radial crack signals and transverse crack signals are distinguished from the characteristic space by combining the damage characteristics of the hard and brittle materials with the acoustic emission characteristic parameters, and the characteristic frequency band range corresponding to each crack damage mode is obtained. A signal classification model for the sub-surface damage mechanism of the hard and brittle materials is constructed, which provides a theoretical basis for realizing the sub-surface damage monitoring of the hard and brittle materials under complex working conditions. The method can quickly identify the damage mechanism of the hard and brittle materials, realize the online evaluation of the subsequent sub-surface damage of the hard and brittle materials, and solve the technical problem of non-destructive and accurate monitoring in the grinding process.

The invention discloses an assembly structure and method for an aero-engine labyrinth ring and fan-shaped section sealing ring scraping and abrasion test, the assembly structure comprises a left heating cavity, a right heating cavity and a flange plate, the left heating cavity, the flange plate and the right heating cavity are connected to form a closed cavity; the left heating cavity comprises a left heating cavity cylinder and a left heating cavity cover plate, an observation window is arranged on the left heating cavity cover plate, and a glass cover plate is embedded in the observation window; the right heating cavity comprises a right heating cavity cylinder and a right heating cavity cover plate, and a round hole allowing the rotating shaft to pass through is formed in the center of the right heating cavity cover plate; the flange plate is provided with a connecting structure used for installing and fixing a fan-shaped section sealing ring. When the fan-shaped section sealing ring is installed on the connecting structure of the flange plate, the scraping and grinding working face of the fan-shaped section sealing ring right faces the observation window on the left heating cavity cover plate and is located in the observation area of the observation window. According to the invention, the scraping and grinding test of the sector section sealing ring and the labyrinth ring in the complex gas-heat environment can be realized, and the assembly difficulty of the labyrinth sealing structure in the scraping and grinding test in the complex gas-heat environment is reduced.

The invention discloses a device, a system, a method and an application for simulating an opposite-grinding test under different working conditions. The device comprises a high-temperature and high-pressure sealing box body, wherein the high-temperature and high-pressure sealing box body comprises a back plate, and a workpiece carrier is connected with the back plate; a first rail is arranged on the first end face, away from the back plate, of the workpiece carrier, and the first clamping device set is connected with the first rail. A second end face and a third end face, perpendicular to the first end face, in the workpiece carrier are provided with a second rail and a third rail respectively, and the second clamping device set is connected with the second rail and the third rail respectively. The first clamping device group is used for clamping a first counter-grinding workpiece; a clamping device of the second clamping device set is provided with a clamping mechanism, a rotating mechanism and an electric loading mechanism, and the second clamping device set is used for clamping a second counter-grinding workpiece so as to clamp the second counter-grinding workpiece to enable the outer wall of the second counter-grinding workpiece to abut against the inner wall of the first counter-grinding workpiece. And the second counter-grinding workpiece is clamped to rotate circumferentially and / or move back and forth on the second track and the third track so as to simulate a counter-grinding test.

The invention relates to a microsphere grinding method and device based on reverse variable speed driving, and the method comprises the steps: determining the working conditions and structural parameters of simulation and test microsphere grinding, building a topological model of a simulation object, and importing the topological model into dynamics simulation software; dynamic simulation software is used for running simulation calculation to compare related data of the microspheres obtained through simulation, and whether the microsphere revolution collision phenomenon exists in a simulation result or not is judged; and if the microsphere revolution collision phenomenon exists, the time-varying driving speed function is traced back to apply the time-varying driving speed function to an actual microsphere grinding test, and finally, when the microspheres meet a preset relatively stable revolution operation condition, a corrected time-varying function is derived and applied to actual variable-speed grinding. Therefore, the problems of surface defects, dimensional deviation and the like caused by the fact that the grinding disc has a fixed eccentric distance, the revolution speeds of the microspheres at different positions are different, and a plurality of microspheres are easy to collide when being ground at the same time are solved.

The application provides an evaluation method for the anti-peeling performance of a surface hardening layer of a wheel-rail material, and relates to the technical field of performance evaluation of a railway wheel-rail material.The evaluation method comprises the following steps: preparing a rail material sample and a wheel material sample; performing surface hardening treatment on the rail material sample and the wheel material sample respectively, and forming a hardening layer on the surface of the rail material sample and the surface of the wheel material sample; performing a pair grinding test on the rail material sample after surface hardening and the wheel material sample after surface hardening; measuring cracks generated in the hardening layer after the pair grinding test, and evaluating the anti-peeling performance of the hardening layer according to the measured data.The evaluation method for the anti-peeling performance of the surface hardening layer of the wheel-rail material can uniformly evaluate the anti-peeling performance of the surface hardening layer of different wheel-rail materials.

The utility model relates to a wheel tread profile concave grinding test scheme, which is used for accurately detecting the concave grinding degree of wheels of railway vehicles. The testing device comprises a support which is provided with a concave right-angle-shaped fillet structure matched with a wheel tread, and the support structurally comprises a measuring face opposite to the wheel tread and a transverse positioning face attached to the inner side face of the wheel tread. The bracket is positioned on the inner side surface of the wheel through the transverse magnetic sheet, so that the measuring head of the device can be ensured to be perpendicular to the wheel tread, and the measuring head is ensured to be within a certain range around the nominal radius circle of the wheel. A wheel tread profile concave grinding measuring mechanism is arranged in the measuring surface, the measuring mechanism is composed of an iron core of a springback displacement sensor and a measuring head, the measuring head falls on the tread during measurement, and an acquisition system reads data of each measuring point. Compared with the prior art, the device is simple in structure and high in measurement precision.