110 results about "Specimen preparation" patented technology

The invention relates to a rock rough interface nonlinear seepage visualization test device and method. The device is characterized in that a fissure surface digitalization module generates a digitalized fissure model by obtaining natural rock sample fissure three-dimensional point cloud data through noise reduction, feature extraction and parametric modeling; the crack test piece preparation module is used for preparing a photosensitive resin crack test piece by adopting photocuring 3D printing based on the digital crack model, and then carrying out surface silicon dioxide nanoparticle spraying treatment to obtain the crack test piece; the multi-field flow field acquisition module is used for acquiring flow field information of the crack test piece by applying a microscopic flow field visualization measurement technology; and the seepage modeling analysis module identifies a seepage interface and extracts a dominant flow path based on the flow field information, and fits a nonlinear seepage curve in combination with a Forchhe immer equation to finally obtain a three-dimensional correlation model representing fracture seepage characteristics. The device can accurately reproduce the physical characteristics and seepage environment of the natural rough fracture, and effectively capture the nonlinear seepage rule under the multi-field coupling condition.

The invention relates to the technical field of metallographic microstructure detection, and discloses a method for displaying the austenite grain size of a martensitic structure in stainless steel, which comprises the following steps: S1, sample preparation: cutting, grinding and polishing a stainless steel sample until no macroscopic scratch exists on the surface; s2, preparing an electrolyte: mixing 50%-70% of nitric acid and 30%-50% of deionized water to form a basic solution, and adding 3ml-7ml of phosphoric acid and 1ml-5ml of sulfuric acid into every 100ml of the basic solution; and S3, assembling an electrolysis device: a sample clamp made of martensitic stainless steel is adopted as an anode, austenitic stainless steel is adopted as a cathode, and the soaking area of the cathode is not less than 1500mm. By optimizing the electrolyte formula and process parameters, the original austenite grain size of the martensitic structure in the stainless steel can be clearly displayed. The method solves the problem of unclear display of the stainless steel grain boundary in a traditional method, is not only suitable for martensitic stainless steel, but also suitable for precipitation hardening type stainless steel, and has high universality and applicability.

A concrete test specimen molding device, preparation system and preparation method. The concrete test specimen molding device comprises: a mounting frame, a forming mold (40), a conveying module (41), a vibration module, a tamping module, a leveling module, and a control module; and after a concrete mixture is placed into the forming mold, the vibration module and the tamping module are controlled to start or stop on the basis of performance parameters of the concrete mixture. In the concrete test specimen preparation system and preparation method, a detection device is utilized to perform performance testing on the concrete mixture to obtain the performance parameters. The molding device, preparation system and preparation method reduce labor intensity of operators and improve the preparation efficiency of concrete test specimens.

The utility model discloses an automatic glass slide loading mechanism in a liquid-based slide preparation instrument, which belongs to the technical field of medical equipment, and comprises a loader and a glass slide disc, the loader is provided with a glass slide box for accommodating glass slides, the glass slide box is provided with a glass slide outlet, the glass slide disc is provided with a positioning groove, the position of the glass slide outlet is matched with that of the positioning groove, and the positioning groove is provided with a positioning groove. And a reciprocating slide pushing system is arranged on the loader, and the reciprocating slide pushing system is used for accurately placing the glass slides on different positioning grooves in sequence. According to the utility model, the repeated operation of manually placing and positioning the slide during liquid-based slide preparation is replaced, the problem that the slide is not easy to separate and position is solved, and the manual operation intensity can be reduced, the positioning accuracy can be improved and misoperation is not easy to cause under the condition that the sample preparation amount is large.

The invention relates to a method for rapidly testing the fracture toughness of a composite material based on a digital image. The method comprises the following steps: S1, preparing a sample; s2, loading the sample; s3, data acquisition; s4, data processing; and S5, calculating the fracture toughness. According to the method, the crack propagation behavior is dynamically analyzed by utilizing high-resolution strain data, and the basic mechanical property of the material does not need to be measured in advance, so that the test process is remarkably simplified; meanwhile, a fracture toughness calculation model constructed based on local strain response breaks through indirect correlation limitation of traditional macromechanical parameters, and can adapt to complex stress states of fracture tips at different fiber orientation angles. Besides, through a standardized strain field analysis framework, universal calculation of cross-sample types and sizes is realized, and a high-precision and high-efficiency solution can be provided for fracture evaluation of FRPC from laboratory standard samples to engineering special-shaped structures.

The invention belongs to the field of biochemical detection equipment, and discloses a flaking and dyeing all-in-one machine and a flaking and dyeing method.The flaking and dyeing all-in-one machine comprises a machine base, and a workbench, a moving mechanism and a manipulator assembly are arranged on the machine base; the working table is provided with a working area, and the working area is at least provided with a pretreatment working position and a flaking and dyeing working position; the manipulator assembly is movably arranged on the moving mechanism, and the manipulator assembly is located above the working area; the manipulator assembly comprises manipulators, the manipulators at least comprise a first manipulator and a second manipulator, the first manipulator at least has a first moving position and a second moving position, and the second manipulator at least has a third moving position and a fourth moving position; and the first moving position, the second moving position, the third moving position and the fourth moving position are at least matched with the pre-treatment working position and the flaking and dyeing treatment working position. According to the slide preparation and dyeing all-in-one machine, slide preparation and dyeing of liquid-based sample cells can be integrated into all-in-one equipment, and all steps can be independently and circularly carried out.

The present invention relates to a method and device for rapidly and comprehensively evaluating the performance of tunnel muck used for manufactured sand, comprising the following steps: 1) Specimen preparation: Using a vibration device (1), a temperature control device (3), and a weighing device (10) to rapidly obtain dried and saturated surface-dry specimens. 2) Apparent density and water absorption test: Measuring the mass of water discharged by a known mass of saturated surface-dry specimens and heating to obtain the mass of the dried specimens. 3) Crushing index and softening coefficient test: Pressurizing, automatically screening, and weighing the dried and saturated surface-dry specimens respectively. 4) Soundness test: Realizing the rapid test of soundness based on temperature control, automatic screening, and weighing. 5) Automatic data acquisition and processing: Automatically acquiring and processing the above data. The evaluation method and device proposed by the present invention can simultaneously and rapidly test the physical and mechanical properties and durability of muck, solve the problems such as long test cycle and single test result of muck performance, and are applicable to the rapid evaluation of manufactured sand parent rocks such as muck, pebbles / gravels.

This invention provides a method for spatial positioning of concrete aggregates, a device for making concrete specimens, and a method for casting concrete specimens, belonging to the field of specimen preparation technology. The positioning method establishes a three-dimensional space by collecting and building an aggregate model library. Aggregate models are automatically arranged in the space according to a preset aggregate gradation ratio and quantity. Using a preset height as a stratification benchmark, the space is divided into several layers from bottom to top, and a corresponding layer number is generated for each aggregate model based on the height of its lowest point. The outer contour of the aggregate to be positioned is projected upwards as a defined range, with the positioning point located within this range and intersecting the outer surface of the aggregate. The centroid projection line of the aggregate to be positioned passes through the positioning point or is located within the connection range of the positioning point. This yields the layer number and positioning point coordinates of the aggregate to be positioned in the specimen making device during subsequent specimen casting. This method achieves precise placement and stable positioning of the aggregates, improving the consistency of the specimen structure and the reliability of experimental data.

The utility model relates to a three -axis sample preparation device with grading limiting function relates to geotechnical mechanics experimental equipment technical field, it includes with centering the lock base for fixed three -piece mould of clamping groove, with the tamping hammer subassembly for tamping treatment to soil material in three -piece mould of hammer head and with the limiting component for the limiting of hammer head moving path of limiting disc and is used to three -piece mould's direction of moving away or close, limiting disc is along the moving direction of hammer head and adjusts position and restricts the moving end position of hammer head in stages, tamping hammer subassembly still includes the guide rod for connecting hammer head of wearing in limiting disc and the limiting baffle ring of setting at the side of guide rod away from hammer head, limiting baffle ring and limiting disc abut and are used for the downstroke of rigid locking hammer head. The utility model has the effect that improves the precision of actual compaction thickness in compaction process.

The utility model discloses a sample preparation device for geotechnical tests, which belongs to the technical field of geotechnical tests and comprises a first sleeve and a second sleeve, a limit cylinder concentric with an arc edge is fixed on the top of the first sleeve, and an insertion cylinder is slidably arranged on the first sleeve through the limit cylinder. A plurality of limiting clamping blocks distributed in an annular array mode are fixed to the outer side wall of the inserting cylinder, a plurality of positioning clamping grooves distributed in a linear array mode are formed in the limiting clamping block farthest from the linear edge, a limiting sleeve is fixed to the side, close to the linear edge, of the top of the first sleeve, and a check block is slidably connected to the inner side wall of the limiting sleeve. And the end, away from the limiting sleeve, of the check block is slidably inserted into the limiting cylinder, the check block acts on the positioning clamping groove, a fixing block is arranged on one side of the top of the first sleeve, and a limiting rod is fixed to one side of the check block. When the sample preparation device for the geotechnical test is used, a soil sample for the test can be cut by using the insertion cylinder under the action of the cutter and the insertion cylinder and stored in the insertion cylinder.

To provide an improved device and method for acquiring an aliquot from a liquid-based biological sample such as a Papanicolaou smear test sample, while minimizing the risk of secondary contamination.SOLUTION: An automated system for processing a sample contained in a liquid sample container includes an automated tool head configured to rotate about a first axis, and to translate along a second axis different than the first axis, an analytic element positioner having an analytic element holder configured to releasably hold an analytic element, and a specimen transfer device mounted on the tool head, where the tool head is configured to automatically position a working end of the specimen transfer device to obtain a specimen from a sample container held in the sample container holder, and to transfer the obtained specimen to an analytic element held by the analytic element holder, respectively, through one or both of rotation of the tool head about the first axis and translation of the tool head along the second axis.SELECTED DRAWING: Figure 10

This disclosure provides an apparatus for preparing and curing tensile test specimens, relating to, but not limited to, the field of specimen preparation and curing. The apparatus includes a cabinet with a receiving space and a pull-out hole, a control mechanism within the cabinet, and a pull-out assembly. The control mechanism controls the temperature and humidity of the receiving space, enabling curing of the specimens within the space. This avoids the need to transport the specimens to a curing chamber after preparation, preventing deformation and contamination during transport and reducing labor costs. The pull-out assembly includes a body with multiple receiving slots and a cover with multiple mold holes. Each receiving slot contains an elastic element and a test block. The elastic element is located on the body and abuts the test block against the side of the cover facing the receiving slot, closing the mold hole. This ensures uniform depth of the multiple mold holes, resulting in a specimen with uniform thickness after sample application.

A specimen storage for storing an observation specimen obtained by providing an observation object on a light transmissive plate, comprises an opening and closing member that is movably attached to a main body of the specimen storage in one direction, and an abutting member configured to be able to abut on a case for housing observation specimens, wherein the opening and closing member is provided to be movable with respect to the main body so as to abut on the case when the opening and closing member is a closing state and to be separated from the case when the opening and closing member is an opening state.

The invention relates to the technical field of rock mechanics test sample preparation, and particularly discloses an energy-absorbing anchoring body structure precise preparation device and a preparation method thereof.The energy-absorbing anchoring body structure precise preparation device comprises a frame body, a first motor is fixedly installed on the surface of the frame body, a transmission box is installed at the output end of the first motor, and the transmission box is installed on the surface of the frame body; a transmission case is installed on the frame body, a three-jaw chuck is installed on the end face of the transmission case, a sleeve is installed on the end face of the three-jaw chuck, and the clamping mechanism comprises two fixed rails fixedly connected to the two sides of the inner wall of the frame body respectively. A round pipe is arranged on the anchor rod mold, and in the downward moving process of the anchor rod mold, the round pipe is in extrusion fit with two baffles below the round pipe, so that transmission of a gear and a gear block is achieved, the effect that two first arc-shaped plates are combined together is achieved, and along with continuous downward moving of the anchor rod mold, the anchor rod mold can be fixed. And the circular pipe is matched with the connecting rod through a spiral groove of the circular pipe, so that the first arc-shaped plate rotates.

The utility model discloses a triaxial sample preparation device for sludge-sand mixed soil. The triaxial sample preparation device comprises a consolidation container, a rack, a force transmission mechanism, a mounting plate assembly, a pressure sensor, a pushing device and a dial indicator, the rack comprises stand columns, lifting plates and a fixing base, the stand columns are vertically installed at the left end and the right end of the fixing base, and the lifting plates are slidably installed on the stand columns on the two sides. The installation plate assembly is fixedly installed at the upper end of the stand column, the force transmission mechanism is vertically installed in the middle of the installation plate assembly, the bottom end of the force transmission mechanism is connected with the pressure sensor, the consolidation container is arranged between the force transmission mechanism and the lifting plate, the pushing device is fixedly installed at the top of the fixing base, and the upper end of the pushing device abuts against the lifting plate. The bottom of the lifting plate abuts against the lifting plate. And the pressure sensor and the pushing device are electrically connected with an external control system. According to the device, moisture and gas in the sludge-sand mixed soil can be effectively discharged, a sample is effectively prevented from being broken, and the sample is favorably formed.

The present invention discloses a static compaction type triaxial test specimen preparation device and a usage method thereof. The specimen preparation device includes a specimen preparation cylinder, a sealing device and a support frame. The specimen preparation cylinder is composed of two split molds spliced together. The specimen preparation device is provided with a static compaction device for compacting the soil sample in the specimen preparation cylinder. The static compaction device includes a compaction bottom plate and a compaction rod formed by connecting a plurality of compaction rod sections. The top end of the compaction rod is connected to an axial loading device on the axial loading platform of the triaxial testing machine; the support frame includes several vertical support rods arranged around the specimen preparation cylinder, and a transverse support rod for supporting the compaction rod is hinged to the upper part of each vertical support rod. A displacement sensor support platform is also provided on the support frame. The present invention uses a compaction method to prepare specimens. By using the triaxial test specimen preparation device and the axial loading platform of the triaxial testing machine, the particle breakage of the specimen during the specimen preparation process can be minimized to the greatest extent, ensuring the uniformity of the specimen and the accuracy of the volume change measurement.

The present invention provides a method for preparing a weld specimen with a crack, which relates to the technical field of weld specimen preparation. The method comprises the following steps: S1: Process the bevels at the welding ends of two base metals. The main weld is located between the two bevels, and the two base metals are welded at the main weld; S2: Process a first groove on the outer side wall of the base metal, and the first groove penetrates through the main weld; S3: Weld in the first groove to form an induced layer; S4: Process a second groove on the surface of the induced layer, and perform welding in the second groove by means of fusion welding. After welding, perform a cooling treatment to generate cracks; S5: Complete the welding of the cover layer of the main weld, and cover the crack inside the welding material during welding. By adopting the present invention, the crack morphology is realistic, and the position and depth of the crack are easy to control during the preparation process. It can be detected and verified in ultrasonic testing to ensure the reliability of the simulation test results. Compared with the fatigue loading method, this method effectively saves the production cost and time of cracks.

The invention belongs to the technical field of material performance testing, and relates to a metal material large-range equivalent stress-strain curve testing method which comprises the following steps: 1, preparing a test piece; preparing the test piece model into a round bar test piece, wherein the middle section of the round bar test piece is provided with an axisymmetric annular notch; 2, testing; a loading device is adopted to load the round bar test piece under displacement control, meanwhile, a high-speed camera is adopted to directly face the round bar test piece to shoot, and the applied load and the change of the notch size are monitored; stopping when the round bar test piece is broken; 3, processing data after the test; sequentially calculating the size of the notch, the strain in the transverse direction of the notch, the real stress in the test process and the engineering stress; 4, correcting real stress; converting the real stress obtained by the notched sample into the equivalent stress of the material; the equivalent stress-strain curve of the material can be obtained by measuring the initial fracture size and the hardening index, and the test cost is lower.

The invention discloses a sample preparation and detection device in liver cancer biopsy, and relates to the technical field of sample preparation and detection, the sample preparation and detection device comprises a table top, the upper surface of the table top is provided with a detection frame for detecting a sample, and the front side of the table top is provided with a conveying belt for adjusting the position of the sample; and a heating box for drying the dyed specimens is fixedly connected above the conveying belt. According to the sample preparation detection device in the liver cancer biopsy operation, the air pressure in the adjusting box can be changed through the intermittently-started warm air blower, when the warm air blower is started, the air pressure in the adjusting box is increased, the spherical spraying pipe rotates around the air supply pipe, the air spraying direction is changed, and large-range heating treatment on the interior of the heating box is achieved; the air pressure in the adjusting box is reduced, under the action of the reset spring, the spherical spray pipe also restores to the initial position, and the circulation is repeated, so that the heat distribution in the heating box is more uniform under the action of the swing mechanism, and the drying effect and efficiency of sample preparation are improved.

The utility model relates to the technical field of pathological specimen manufacturing, and discloses a bone tumor pathological specimen sampling adjustable fixator which comprises a base, a fixing plate is fixedly connected to the base, at least one evenly-arranged slide making groove is formed in the fixing plate, a stroke through groove is formed in the position, above the slide making groove, in the fixing plate, and the stroke through groove is communicated with the slide making groove. A long moving rod is slidably arranged in the stroke through groove, holding plates matched with the sheet making grooves are fixedly connected to the long moving rod, electric push rods are arranged in the holding plates, pressing plates matched with the upper glass sheet are fixedly connected to the lower ends of the electric push rods, and limiting moving plates are fixedly connected to the two ends of the long moving rod; and fixed limiting plates are fixedly connected to the two sides of the base correspondingly, plate body stroke grooves matched with the limiting moving plates are formed in the fixed limiting plates correspondingly, and sliding rods are fixedly connected to the fixed limiting plates correspondingly. Compared with the prior art, the upper glass fixing device has the advantage that upper glass of different sizes can be fixed.

The invention relates to a novel manufacturing method of a macro fungus specimen, which can effectively solve the problems of single fungus specimen, low manufacturing speed and low efficiency in the prior art. The manufacturing method comprises the following steps: 1) collecting a fungus specimen; 2) alcohol dehydration and vacuum drying; 3) preparing transparent pouring glue; and (4) demolding. According to the method, the conditions of alcohol dehydration and vacuum drying are utilized, so that the time and cost for drying the macro fungus specimen are reduced; the layering sense of the specimen is improved by adopting a batch glue filling mode, and meanwhile, an optimal scheme for keeping the original state of the macro fungi is obtained; alcohol in fungi is thoroughly removed by adopting a vacuumizing method, and a set of efficient and rapid large fungus solidified specimen manufacturing method is established in the whole process. The macro fungus specimen manufactured by the method is complete in form, free of bubbles, clear in structure, high in ornamental value, capable of being stored for a long time and used for popularization of science, appreciation and teaching, and is an innovation of the macro fungus specimen manufacturing method.

The application provides a preparation method and application of an insect specimen, and belongs to the field of specimen preparation. The preparation method of the insect specimen comprises the following steps: collecting insects and observing, finding an insect mating pair, freezing the insect mating pair, fixing the frozen insect mating pair in a fixing solution, and transferring the insect mating pair into a storage solution to obtain the insect specimen. The preparation method of the insect specimen can fully expand the genital organs of the Phyllophaga, and maximally retains the mating state of the insects. After dissecting the prepared specimen, the lock-and-key theory in the reproductive isolation of insects can be verified. In addition, the Phyllophaga specimen prepared by using the method can be applied to the identification of female Phyllophaga.

The utility model relates to the technical field of test piece preparation, in particular to an inorganic binder test piece manufacturing and demolding all-in-one machine and a manufacturing system, which comprise a rack, a push-pull plate, a stirring device, a console, a mold bearing platform, a guide rod and a telescopic mechanism, a mold bearing platform is arranged on the base, guide rods are arranged on the periphery of the mold bearing platform, a mold is placed in the mold bearing platform, and through holes are formed in the bottom of the mold bearing platform and the bottom of the mold; a first telescopic mechanism and a second telescopic mechanism are further arranged on the base, the first telescopic mechanism penetrates through the through hole to push the test piece, and a cushion block is further arranged in the mold; the second telescopic mechanism pushes the mold bearing platform; a push-pull plate is further arranged on the top of the machine body, and the edge of the push-pull plate abuts against the edge of the mold. The machine body is further provided with a console for controlling starting of the telescopic mechanism. According to the device, compaction and demolding of inorganic binder test piece manufacturing can be completed at a time in the molding device, different devices do not need to be replaced, and the accuracy of test results and the efficiency of test work are improved.

The mouse intestine roll specimen preparation device comprises a box body, a box cover, a sliding plate and an insertion column, the top face of the box body is open, and the box cover is connected to the opening of the top face of the box body in an inserted mode; the sliding plate is located on the inner bottom face of the box body, the side face of the sliding plate is slidably connected with the inner side wall of the box body, and the sliding plate slides in the vertical direction. The upper surface of the sliding plate is symmetrically provided with two rows of jacks, each row of jacks comprises three jacks, the lower ends of the insertion columns are provided with insertion blocks, and the insertion blocks are connected with the holes in a pluggable mode. According to the mouse intestine dehydration device, after the mouse intestine is completely dehydrated, the sliding plate and the insertion columns are moved upwards to be completely away from formalin solution, and the insertion columns are pulled out of the insertion holes, so that the mouse intestine can be conveniently taken down from the insertion columns, and subsequent sample manufacturing is facilitated; the mouse intestine is in a specific shape, and after the mouse intestine is soaked in a formalin solution and dehydrated, the mouse intestine has a plurality of straight sections, so that the later processing and manufacturing of specimens are facilitated.

The utility model relates to a cutting device for animal specimen sampling, comprising: a container which is provided with a bottom surface and a side wall and is made of organic glass; the bottom supporting plate is provided with a bottom plate and four supporting columns, the supporting columns are erected at the four corners of the bottom plate, the bottom supporting plate is perpendicular to the bottom plate, an inserting groove is formed in the direction of one edge a of the bottom plate, the other inserting groove is formed in the direction of the opposite side edge b of the edge a of the bottom plate, the bottom supporting plate is detachably arranged in the container, and the supporting columns are higher than the side wall of the container. The bottom plate and the supporting columns are made of organic glass; and the comb plate is provided with a cross beam and comb teeth arranged on the cross beam at intervals, the comb plate is detachably inserted into the slot through the cross beam, and the comb plate is made of copper.

The present invention provides an automated system and method for collecting biological samples from liquid sample containers and distributing those samples onto analytical elements such as sample slides, as well as an automated system and method for obtaining aliquots of samples for additional testing. [Solution] An automated system for processing a sample contained in a liquid sample container comprises an automated tool head configured to rotate around a first axis and move along a second axis different from the first axis; an analytical element positioner having an analytical element holder configured to hold an analytical element in a releasable manner; and a sample transfer device mounted on the tool head. The tool head is configured to automatically position the working end of the sample transfer device by either or both rotation of the tool head around the first axis and / or movement of the tool head along the second axis to acquire a sample from a sample container held in a sample container holder and transfer the acquired sample to an analytical element held in an analytical element holder.

A device and method for preparing frozen tissue specimens are disclosed. The device includes a solid block having a top surface and a bottom surface, with two parallel side walls extending upward from the top surface. A slotted groove is formed in the middle of the solid block and extends from the top surface to the bottom surface to receive a specimen chuck, such that a head of the chuck rests on the top surface. Top edges of the side walls support a tissue slide containing an encapsulated specimen. The device may include finger grooves for manual handling and is preferably made of a heat-conducting material to assist in rapid freezing. The method involves placing the specimen chuck in the groove, depositing a freezing medium over it, and positioning the tissue slide so that the specimen contacts the freezing medium for effective specimen preparation.

The invention discloses a method suitable for manufacturing a microbial specimen by sealing UV glue, and belongs to the technical field of microbial specimen manufacturing, microorganisms are inoculated to a plate culture medium for culture, then a cultured microbial plate is sterilized and dried, the preheated UV glue is poured into the dried microbial plate, and the microbial specimen is obtained. And carrying out auxiliary defoaming by using a hot air gun or a syringe needle or a vacuum pump, and finally, irradiating for 5 minutes or 8 minutes by using a 36W ultraviolet lamp, so as to obtain the microbial specimen. The method is mainly used for keeping morphological characteristics such as bacterial colony shape and color of microorganisms to the greatest extent after a series of specimen manufacturing process steps are carried out on a cultured microorganism plate with relatively obvious bacterial colony morphological characteristics, the processing steps are simple, convenient and safe, the prepared specimen is stable, and the method is suitable for large-scale popularization and application. The exhibition period is longer, and the exhibition effect is better.

The present application relates to rock sample preparation technical field, disclose a kind of soft and hard interbedded rock specimen preparation device, including workbench, workbench top is provided with mounting groove, mounting groove is equipped with protective cylinder, the bottom of protective cylinder is equipped with shaft hole, shaft hole is equipped with grinding disc spindle, the top of grinding disc spindle is connected with grinding disc, still be provided with the polishing motor of the connecting grinding disc spindle bottom in workbench;Workbench is detachably equipped with support, one end of support is connected with the clamping mechanism for clamping test piece.The clamping mechanism includes installation cylinder, the top of installation cylinder is connected with support, the bottom surface of installation cylinder is equipped with clamping groove, clamping groove is equipped with magnetic layer, and metal plate is magnetically attracted in clamping groove.The present application can realize automatic polishing, its working process improves work efficiency, reduces the error caused by manual operation, ensures the quality stability of test piece, and clamping mechanism can quickly fix sample, can adjust sample polishing pressure, and the polishing effect is better.