56 results about "Shear strength test" patented technology

The utility model discloses a tool for testing the shear strength of a junction surface of a concrete mold and concrete. The tool comprises a first mounting seat and a second mounting seat, the two sets of first pressing blocks are provided with first surfaces used for making contact with post-pouring concrete, and the two sets of first pressing blocks are arranged on the first mounting base and can move oppositely or oppositely in the first direction; the first mounting base and the second mounting base can move relatively or oppositely in the second direction, and the second direction is perpendicular to the first direction; the two sets of second pressing blocks are provided with second surfaces used for making contact with the concrete mold, the two sets of second pressing blocks are arranged on the second mounting base, and the two sets of second pressing blocks can move oppositely or oppositely in the first direction; in the first direction, the outer side edge of the first surface can be aligned with the inner side edge of the second surface in the second direction. The testing tool can improve the accuracy of shear strength measurement of the junction surface of the concrete mold and the post-poured concrete.

The invention discloses a multi-scale research method for soil body strength degradation under the dry-wet cycle effect. The multi-scale research method comprises the following steps: S1, preparing a sample from collected test soil under the dry-wet cycle effect; s2, testing the macroscopic shear strength of the soil body by using the triaxial sample prepared in the step S1; s3, the cutting ring sample prepared in the step S1 is used for soil microcosmic fracture testing; s4, carrying out a soil body micro-pore test by utilizing the microstructure sample prepared in the step S1; and S5, analyzing the soil body strength degradation rule of the collected test soil under the dry-wet cycle action by using the test results of the soil body macroscopic shear strength test, the soil body microcosmic crack test and the soil body microcosmic pore test. According to the method, through multi-scale analysis, related enterprises can more comprehensively evaluate the degradation rule of the soil body under the dry-wet cycle effect, so that an engineering construction design scheme is optimized, and the risks of landslide, collapse and other engineering accidents caused by soil body strength reduction are reduced.

The invention discloses a test fixture and a shear strength test system. The test fixture comprises a plurality of shear plates, two clamping blocks, a plurality of reinforcing sheets, a plurality of first-class mechanical fasteners and a plurality of second-class mechanical fasteners. The shear strength test system comprises a test fixture, a test piece to be tested and a testing machine, the to-be-tested test piece is used for being tightly connected into a mold sleeve piece formed by tightly connecting a plurality of shear plates through a plurality of reinforcing sheets of which the front and back surfaces are adhered to each non-impact damage area; and the testing machine is used for testing the shear strength of an impact damage area surrounded by each non-impact damage area on the to-be-tested test piece by applying a tensile load after establishing a connection relationship with the mold suite through the two clamping blocks. The test fixture provides reliable test support by means of the structure and the connection mode with good universality, and adapts to diversified test scenes in material science research and engineering application.

The invention provides a hierarchical mixture design index and optimization method according to functional requirements of different pavement layers (a surface layer, a middle surface layer and a lower surface layer) in combination with climate zoning and traffic load characteristics. According to the method, key mechanical parameters (the dynamic stability of a surface layer is greater than or equal to 6000 times / mm, and the low-temperature bending strain of a lower surface layer is greater than or equal to 2500 mu epsilon) are determined according to the horizon function, and then the mineral aggregate gradation and the special asphalt dosage are optimized through coupling analysis of volume parameters (the void ratio is 3%-5%, and the mineral aggregate void ratio is greater than or equal to 17%) and mechanical properties. And meanwhile, a bonding layer interface shear strength test (greater than or equal to 1.2 MPa) is introduced, so that the structural integrity is ensured.

The invention relates to the technical field of material mechanical property testing, and provides a tool device and a method for preparing a shear strength test sample, the tool device comprises at least two test tools, and each test tool is provided with a bonding surface and a through hole; a baffle assembly is arranged on the gluing tool, and a clamping groove is formed in the baffle assembly; when the testing tool is placed in the clamping groove, the height of the baffle assembly is larger than that of the bonding face, and the difference value between the height of the baffle assembly and the height of the bonding face is the thickness of the gluing layer. Mounting grooves are formed in the bonding tool, positioning convex blocks are arranged in the mounting grooves, and the positioning convex blocks are matched with the through holes; the pressurizing tool comprises a pressing plate and a connecting plate, and the connecting plate is vertically arranged below the pressing plate. According to the tool device for preparing the shear strength test sample, the prepared shear strength test sample is uniform in adhesive layer, free of bonding dislocation and controllable in pressurization.

The invention relates to the technical field of rock shearing, in particular to a rock shearing strength test device, test system and test method.The test device comprises a counter-force base, a horizontal loading device, a horizontal bearing plate, a vertical loading box, a vertical fixing box and a vertical loading device; the counter-force base is provided with a loading chamber, a pair of horizontal loading devices are symmetrically arranged on two opposite side walls of the loading chamber, and each horizontal loading device is connected with a horizontal bearing plate; the grooves in the vertical loading box and the vertical fixing box jointly form a space for placing a rock sample, and a pin roller is arranged on the contact surface of the vertical loading box and the vertical fixing box; and the vertical loading device applies a load to the sample through the vertical loading box. In the test process, the deformation and fracture characteristics of the rock shearing surface can be directly observed, and compared with an existing rock shearing device, the rock shearing device is more visual and closer to actual engineering, and has the characteristics of being convenient to operate and low in cost.

The present application relates to the technical field of rock shearing, and especially relates to a rock shearing strength test device, a test system and a test method, wherein the test device comprises a counterforce base, horizontal loading devices, horizontal bearing plates, a vertical loading box, a vertical fixing box and vertical loading devices; the counterforce base has a loading chamber, a pair of horizontal loading devices are symmetrically arranged on two opposite side walls of the loading chamber, and each horizontal loading device is connected with a horizontal bearing plate; the vertical loading box and a groove on the vertical fixing box jointly form a space for placing a rock sample, and a roller is arranged on the contact surface of the vertical loading box and the vertical fixing box; the vertical loading devices apply a load to the sample through the vertical loading box. In the test process, the deformation and rupture characteristics of the rock shearing surface can be directly observed, the present application is more intuitive than the existing rock shearing device, is closer to the actual engineering, and has the characteristics of convenient operation and low cost.

The utility model relates to an asphalt test piece interlayer shear strength shearing clamp, and belongs to the field of road detection, the asphalt test piece interlayer shear strength shearing clamp comprises a clamp main body and a cutter part, the clamp main body is provided with a first side plate, a second side plate and a top plate; the first side plate and the second side plate are oppositely arranged, a cutting cavity is formed between the first side plate and the second side plate, and the top plate is connected to the top of the first side plate and the top of the second side plate. The first side plate is provided with a mounting through hole for horizontally inserting an asphalt test piece; the mounting through hole is provided with a supporting cambered surface for supporting an asphalt test piece, the top plate is provided with a cutter insertion hole for allowing the cutter piece to be vertically inserted, and the front end of the cutter piece is provided with an arc-shaped notch matched with the asphalt test piece. The device can be applied to the effect of testing the interlayer shear strength of the asphalt pavement by using the straight cutting method.

The application discloses a kind of pressure-maintaining core cross plate shear device and shear strength test method, device includes sample pressure-maintaining system, test system, control system, data acquisition system;Sample pressure-maintaining system is guaranteed by ball valve to ensure the pressure state, reach the purpose of pressure-maintaining stable before and after testing, test system carries out shear test to test sample shear strength by cross plate, control system realizes the extension and contraction of telescopic rod and the work of torque applicator, ensure that cross plate enters sample and carries out work, data acquisition system is in real time by torque sensor, HX711 module, single-chip microcomputer, RS485 communication serial port acquisition, transport and process data, and save in PC end.The application can carry out the pressure-maintaining core shear test device of testing on ship.It has strong guiding function to study submarine landslide generation mechanism, realize the safe exploitation of flammable ice and ensure the safety of submarine engineering construction.

The invention relates to the technical field of geotechnical engineering and geological disaster prevention and control, and discloses a loess slope stability calculation method considering a stress state, and the method comprises the steps: building a slope three-dimensional model according to the landform, geologic structure and rock-soil body physical and mechanical parameters of a slope; applying a load in the side slope three-dimensional model and setting boundary conditions to obtain a stressed side slope three-dimensional model; carrying out stress field solving on the three-dimensional model of the stressed side slope to obtain a global stress field of the side slope; for each collected soil sample, extracting a corresponding stress tensor from the stressed slope three-dimensional model, and determining a confining pressure condition corresponding to an indoor shear strength test; according to the confining pressure condition, an indoor shear strength test is carried out, and a soil shear strength index under the actual stress field condition is obtained; a soil sample representative horizon method is adopted, the stratigraphic position corresponding to each soil sample is analyzed, the slope stability is calculated, and the slope safety coefficient and the potential sliding surface position are obtained. Therefore, the accuracy of slope stability analysis is improved.

The application discloses an anchor bolt shearing strength test device, and relates to the field of new anchor bolt material detection. The upper end of a preset base frame is provided with a driving motor assembly, the surface of the preset base frame is provided with a hydraulic driving assembly, and the output ends of the driving motor assembly and the hydraulic driving assembly are both provided with movable nesting pieces. The anchor bolt shearing strength test device is provided with a guiding and locking mechanism. The guiding and locking mechanism keeps the eccentricity-preventing and centering positioning state of the detected workpiece. The upper and lower ends of the locking butt joint pieces work together to keep the anchor bolt centered during the locking process, ensure that the shearing force is always perpendicular to the anchor bolt axis, and make the guiding and locking mechanism and the guiding spherical wrapping piece on the end side contact each other. The guiding spherical wrapping piece provides flexible wrapping while its uniform expansion characteristic further assists the anchor bolt in keeping the centered position, effectively eliminates the additional bending moment caused by eccentric loading, makes the measured shearing strength value closer to the real strength of the material, forms multi-dimensional positioning constraints, and improves the test accuracy and repeatability.

The invention discloses a triaxial shear strength testing method for a sewage discharge tunnel circular seam plugging ice plug body. The method comprises the following steps: S1, cutting a cylindrical sponge sample from medium-density sponge; s2, sleeving the side surface of the cylindrical sponge sample with a rubber membrane, and mounting a bottom steel support at the bottom; s3, injecting water into the cylindrical sponge sample in the rubber membrane to obtain a cylindrical sponge sample after water injection; s4, the cylindrical sponge sample after water injection is placed in a test block curing box and frozen at different set temperatures to form cylindrical sponge ice samples, and the set temperatures are the same as the average temperature of an ice plug body planned to be formed through liquid nitrogen freezing construction; s5, placing the cylindrical sponge ice sample in a triaxial testing machine, and performing a triaxial shear strength test under a set confining pressure to determine the shear strength of the cylindrical sponge ice sample under a simulated working condition; and S6, according to the test data in the S5, obtaining the triaxial shear characteristics of the cylindrical sponge ice at different set temperatures. The technical difficulty that an in-situ shear test cannot be performed on the ice plug body on site is solved.

The invention discloses a fractured rock mass high-pressure grouting sample manufacturing device and an interface shear strength testing method.The sample manufacturing device comprises a permeable stone box body, a fixed rock block and a movable rock block, and the fixed rock block is installed in one side of the permeable stone box body in a sealed mode and fixed through a rigid fixing supporting body; the movable rock block is mounted in the other side of the permeable stone box body in a sliding and sealing manner and is supported by a spring group; the interface shear strength test method comprises the following steps: mounting a test part on a sample, and mounting an adjustable cushion block for adjusting the position of the sample relative to a shear gap at the bottom of the sample so as to adjust the shear position; different shearing positions of the multiple groups of samples are tested, and data are recorded respectively. According to the manufacturing device for the fractured rock mass high-pressure grouting sample, the in-situ dehydration process of slurry in the high-pressure grouting process is simulated, the slurry stone body strength in the sample and the interface bonding strength of the slurry and rock are close to the in-situ state, and non-negligible errors caused by test conditions are greatly reduced.

The utility model discloses a tool for testing the impact shear strength of an LNG (Liquefied Natural Gas) polyurethane foam sample, which comprises a base block, a pressing block and an impact column, the base block is provided with a positioning groove matched with the pressing block, and the positioning groove and the pressing block are respectively and longitudinally provided with a first impact hole and a second impact hole which are butted and matched with each other; the first impact hole and the second impact hole are matched with an impact column, and the impact column is connected to a testing machine. According to the utility model, the punching positioning precision of the sample can be ensured, the accuracy of the impact shear strength test is ensured, the test effect is ensured, the sample cannot be damaged in the whole test process, the operation is simple and efficient, and the test efficiency is also obviously improved.

The utility model discloses a device for testing shear strength of cement stabilized soil, which belongs to the technical field of soil detection and comprises a base, a shear box is arranged on the base and comprises a lower box and an upper box, the upper box is placed at the top end of the lower box and provided with four second through holes, and the second through holes are communicated with the lower box. According to the utility model, the tops of the four positioning rods on the positioning assembly slide into the four through holes II in the upper box, so that the upper box can be conveniently positioned and fixed, the placement time of a sample is greatly shortened, and the test efficiency of the direct shear apparatus is effectively improved; the lifting scraping disc is pushed to move upwards in the lower box through the lifting cleaning assembly, so that the fractured part of the sample in the lower box can be quickly taken out, residual sample scraps on the surface of the inner wall of the lower box can be conveniently scraped and cleaned, the operation time is greatly shortened, and the cleaning efficiency of the fractured part of the sample in the lower box is effectively improved.

The invention relates to the technical field of geotechnical engineering, in particular to a discrete material pile composite foundation shear strength optimization calculation method which comprises the steps that 1, a remolded soil sample preparation device is used for remolding and preparing a matrix sample, a composite soil body is prepared according to different replacement rates, and a back pressure saturation method is adopted for saturating the sample and then conducting consolidation and drainage; 2, carrying out a shear test, and after the shear test is finished, dismounting the sample, weighing the mass and measuring the water content of a matrix; 3, drawing an effective stress path curve, calculating an effective internal friction angle and effective cohesion, and calculating shear strength test indexes of the composite soil body under different replacement rate conditions; and 4, correcting the pile body confining pressure in the composite soil body, inverting the pile-soil interaction coefficient, and calculating the cohesive force and the internal friction angle of the composite soil body based on the same matrix material and the reinforcement filler. The pile-soil interaction is exerted, the action rule of the pile-soil interaction is fully utilized, the calculation result better conforms to the action mechanism of the composite foundation, and the shear strength index value is increased from the engineering perspective.

The invention relates to the technical field of water conservancy projects, in particular to an asphalt concrete material shear strength testing device. Comprising a test box, the inner walls of the two sides of the test box are slidably connected with sliding blocks, the interiors of the sliding blocks are rotatably connected with bidirectional lead screws, one ends of the bidirectional lead screws are fixedly connected with rockers, the two sides of the bidirectional lead screws are in threaded connection with threaded blocks, the interiors of the threaded blocks are fixedly connected with connecting rods, and the outer walls of the connecting rods are rotatably connected with first rotating plates; a first rotating shaft is fixedly connected into the first rotating plate, and a pressure applying assembly is arranged on the lower surface of the supporting plate. According to the asphalt concrete material shear strength testing device provided by the invention, different extrusion heights between the pressure applying assembly and the test piece are adjusted to test the performance of the test piece under different stress conditions, and the ultimate shear force performance test of continuous extrusion until the test piece is fractured is realized; the pressure applying assembly is ensured to accurately apply different shear forces to different test pieces, test errors caused by inaccurate pressure applying positions are reduced, and the precision of test results is improved.

This invention discloses a method for testing the shear strength of the frozen soil-concrete interface in underground excavation and obstacle removal operations. The steps are as follows: S1, pouring concrete test blocks of the same strength as the actual underground continuous wall under the working conditions; S2, placing the concrete test block into one end of a mold box, and filling the other end of the mold box with the same type of core soil as the core layer in the actual working conditions; S3, placing the mold box into a test block curing box, and freezing it at different set temperatures to form frozen soil-concrete samples; S4, placing the frozen soil-concrete samples into a testing machine, applying vertical pressure to the frozen soil-concrete samples, and applying dynamic load in the horizontal direction using a shear actuator; S5, obtaining the test results of the shear strength of the frozen soil-concrete interface at different temperatures, and analyzing the overall stability of the frozen soil in the core layer under dynamic load. This invention solves the technical dilemma of not being able to conduct in-situ shear strength tests on the frozen soil-concrete core layer on-site, reducing the significant risks of underground continuous wall and frozen soil core layer construction during obstacle removal.

The invention provides a solidified soil unconfined compressive strength and direct shear strength testing device and method.The device comprises a bottom plate, a lower shear box capable of horizontally moving is arranged on the upper side of the bottom plate, an upper shear box is arranged on the upper side of the lower shear box, and aligned through grooves are formed in the middle of the upper shear box and the middle of the lower shear box; a lantern ring matched with the corresponding through groove is inserted into each through groove, a transverse pressurizing plate capable of pushing the lower shear box to move horizontally is arranged on the side of the lower shear box, and a longitudinal pressurizing plate capable of moving longitudinally is arranged above the upper shear box. The device has the beneficial effects that the structures required for testing the unconfined compressive strength and the direct shear strength are integrated; the use is convenient and efficient, and the major problems that the sample specification of a traditional direct shear strength test device is fixed, and time and labor are consumed due to complex secondary processing of a solidified soil sample collected on site are solved; the device is convenient to use, and the test efficiency is greatly improved.

The invention provides a method for analyzing the strength of a carbon fiber laminated plate and foam sandwich structure adhesive joint. The method comprises the following steps: carrying out a shear strength test on a test piece according to a preset test condition, establishing a test finite element model corresponding to the test piece based on the test condition, operating the test finite element model to carry out simulation calculation and the like. According to the method, through test and simulation combined analysis, the bearing capacity difference and the failure mode of the rubber-riveted joint in the carbon fiber laminated plate and the foam sandwich structure which are connected in a rubber-riveted mode under shearing and drawing loads are revealed, a high-precision finite element model is established, possibility can be provided for accurately predicting the performance of the rubber-riveted joint and optimizing key design parameters, and the method has the advantages of being high in reliability and high in reliability. And the limitation of the existing theoretical model or simplified model is broken through.

The invention discloses a method for testing normal shear strength based on a T-shaped joint of a ceramic matrix composite material. The method comprises the following steps: acquiring the geometric dimension of a T-shaped sample of the ceramic matrix composite material to be tested; the T-shaped sample is placed in a loading clamp, and the mounting position of the T-shaped sample is adjusted according to the structure of the T-shaped sample; by arranging the gasket and tightening the puller screw, the sample is effectively fixed; adjusting the position of the loading pressure head, enabling the loading pressure head to act on the web region of the T-shaped sample, implementing a normal shear test, recording the maximum load value in the whole loading process, and calculating the normal shear strength of the T-shaped joint of the ceramic matrix composite material by utilizing a formula according to the recorded maximum load value and the sectional dimension of the T-shaped sample. The problems that the sample is difficult to fix and the test result is inaccurate are solved, and the accuracy of the normal shear strength test of the T-shaped joint made of the ceramic matrix composite material is improved.

This application discloses a piezoelectric ceramic shear strength testing device, belonging to the technical field of testing equipment. The device includes: a base, a test column, a test base, and a limiting plate. The base has a through hole extending vertically, and its upper surface has a groove. The test column is placed in the through hole and can move vertically along it. A downward-opening test groove is provided on the outer wall of the test column, and the top of the test column is connected to a driving mechanism. The test base is placed in the groove, and its upper surface has a horizontal placement groove for placing piezoelectric ceramic specimens. The placement groove and the test groove face each other. The limiting plate is positioned above the test base. This device provides circumferential limiting for the piezoelectric ceramic specimens, effectively preventing slippage, warping, or skew during shear loading, thus improving the accuracy and repeatability of the shear strength test.

The utility model provides a manufacturing tool for a glue shear strength test strip. The manufacturing tool comprises a bottom plate; the positioning assembly comprises a first positioning seat and a second positioning seat which are fixedly arranged on the top surface of the bottom plate, the height of the first positioning seat is smaller than that of the second positioning seat, the top surface of the first positioning seat is used for placing a first spline, and the top surface of the second positioning seat is used for placing a second spline; the pressing assembly comprises a pressing plate and a driving device, the pressing plate is located above the first positioning seat, and the driving device is used for driving the pressing plate to apply pressure to the overlapping area of the first sample strip and the second sample strip extending to the position above the first positioning seat, so that glue forms a glue layer with a certain thickness between the first sample strip and the second sample strip in the overlapping area. Through the cooperative arrangement of the positioning seat and the pressing assembly, it is ensured that the position and pressure of the test strip are consistent in each sample preparation process, and the problem of nonstandardization caused by traditional manual sample preparation is avoided.

The invention discloses a device for testing the shear strength of a prestressed anchor group. The device comprises a shear box, a reaction frame, a bearing plate, a perforated bottom plate and a load loading system, the shear box is arranged on the inner side of the reaction frame; the load loading system is arranged on the reaction frame and is used for applying a vertical load to the bearing plate and applying a transverse shear load to the shear box; the shear box is composed of an upper frame and a lower frame, and the upper frame and the lower frame are arranged up and down and can be connected into an integrated structure. Each of the upper frame and the lower frame is formed by sequentially enclosing four plate bodies, the bearing plate is arranged at the inner top of the upper frame, the perforated bottom plate is arranged at the inner bottom of the lower frame, and the bearing plate, the upper frame, the lower frame and the perforated bottom plate form a complete box body structure; the bottom plate with the holes is provided with a plurality of vertical anchor holes, and the number, the hole diameter and the distance of the vertical anchor holes can be adjusted. The device is simple in structure, convenient to use and capable of achieving rapid and accurate simulation of diversified anchoring working conditions.

The application provides an interface shear strength test method, which comprises the following steps: step one, curing device manufacturing, manufacturing a hollow circular table with a preset inclined angle θ with the horizontal plane as a curing device; step two, combination body manufacturing, inverting and fixing the curing device on a first flat plate, pouring the prepared cement slurry into the cavity of the curing device until it overflows, placing a second flat plate on top to compact, curing and forming in a high-temperature and high-pressure environment, and then removing the first flat plate and the second flat plate to obtain a combination body; and step three, pressure test, placing the combination body on a fixing device, coaxially placing a pressure head on the top surface of the curing device, and starting a pressure test device to measure the interface shear strength. According to the test method, the curing device is designed as a hollow circular table with a certain inclined angle with the horizontal plane, and the inclined angle is specified to be within a certain range, so that the integrity of the demoulded sample can be effectively ensured, the reliability of the experimental results is ensured, and the demoulded sample can be further analyzed.

The present invention discloses a method for preparing waste incineration fly ash and asphalt binder specimens, and a method for evaluating the adhesion of the specimens. The research method comprises the following steps: preparing waste incineration fly ash particles-asphalt binder specimens, characterizing the distribution morphology of fly ash particles; defining and analyzing the unit fly ash adhesion mass value α, adhesion rate β and intrusion micro-distance d q The adhesion of the interface was initially and re-evaluated. If the re-evaluation requirements were met, the subsequent steps were carried out. Continuous and discontinuous groups of WFI fly ash-asphalt binder specimens were prepared. Bond and shear strength tests were conducted on the specimens to determine the stable bond strength value Φ and shear strength value θ. The adhesion of the contact interface was re-evaluated. This research method combines micro- and macro-levels to accurately evaluate the adhesion of the interface between WFI fly ash and asphalt, providing a theoretical basis for the recycling of WFI fly ash in asphalt pavement.

The invention discloses a split type standard component double-shear strength test clamp, belongs to the technical field of standard component mechanical property test equipment, and solves the problems that in the shearing test process of a traditional bolt type standard component, a lower shear of a double-shear test clamp is integrally designed, a bolt is pressed into the lower shear in the mechanical test process, and the mechanical property of the bolt is influenced. The problems that the lower scissors bear internal pressure, the scissors are prone to splitting, and the damaged bolt is clamped into the lower scissors are solved. The scissors comprise a base, a lower scissor I, a lower scissor II and an upper scissor, wherein the lower scissor I and the lower scissor II are split; the lower scissors are installed in the base through the limiting groove, and a limiting opening of the limiting groove can prevent the lower scissors from shifting. The lower scissors are provided with a first shearing hole, and the upper scissors are provided with a second shearing hole coaxially corresponding to the first shearing hole. The device has the advantages that clamping is reliable, operation is convenient, no standard part is clamped after standard part detection is completed, the situation that integrated lower scissors are broken is avoided, operation is efficient, and the detection cost is reduced.

The utility model discloses a kind of shearing strength test fixtures for arc-shaped workpiece, it is related to tooling jig technical field. Including base, two guide rods are fixed on base, the upper portion of base is provided with pressing block, sliding hole is opened in pressing block, sliding slot is opened in the front end of pressing block, installation cavity is opened in the rear end of pressing block, push block is slidably arranged in sliding slot, the front end of push block is provided with inclined extrusion surface, moving plate is arranged in installation cavity, two clamping blocks are fixed on moving plate, recess is opened in guide rod. The utility model is pushed by push block by pressure head descending extrusion, clamping block is inserted in the recess of guide rod, the position of pressing block is fixed, prevent pressing block from moving in testing process, manually fixed without operator, after testing is completed, pressure head is lifted, clamping block can be removed from recess, can be carried out blanking, up and down material process is more simple, convenient to operate, can effectively improve work efficiency.

The invention relates to a manufacturing mold for a polymer-based wear-resistant lubricating material injection shear test piece. The manufacturing mold comprises an upper mold, a middle mold and a lower mold, assembling the middle mold into the test piece groove of the lower mold according to the mode that the test piece round hole is on the left, combining the upper mold according to the mode that injection molding openings are aligned, inserting a test piece round hole positioning pin, carrying out injection molding from right to left, opening the upper mold after injection molding is completed, and integrally taking out the middle mold and the injection molding sample strip from the position of the piece taking groove by using a tool; the whole is used for shear strength testing. According to the invention, the injection shear strength data can be simply and effectively obtained, the mold can flexibly carry out shear performance test and optimization test according to design requirements, and the related research and development cost is remarkably reduced.