518 results about "Emery paper" patented technology

The invention relates to the technical field of furniture production, and particularly discloses a blockboard polishing device for furniture production and processing, which comprises a main frame and a pressure adjusting mechanism, and the pressure adjusting mechanism is arranged in an inner cavity of the main frame; the two supports are arranged on the left side and the right side of the top end of the pressure adjusting mechanism correspondingly. The pressure sensor is arranged at the bottom end of an inner cavity of the support. The device adapts to blockboards of different materials and thicknesses by adjusting the polishing pressure, the uniformity and consistency of the polishing effect are ensured, meanwhile, the problems of polishing efficiency reduction and uneven polishing caused by wood chip blockage are effectively avoided, the polishing quality and the operation efficiency are remarkably improved, in addition, the function of monitoring the abrasion degree of abrasive paper in real time is achieved, and the production cost is reduced. And the stability of the polishing process and the sustainability of the polishing quality are ensured, the production cost is reduced, and remarkable beneficial effects are brought to the furniture production and processing industry.

The invention provides a manual grinding tool, and belongs to the technical field of grinding tools. Comprising a fixing base, a fixing rod and a cover plate detachably mounted on the fixing base, a plurality of sliding grooves and a plurality of first mounting grooves are formed in the top wall of the fixing base at equal intervals, detachable abrasive paper sheets are mounted in the first mounting grooves, sliding blocks are slidably arranged in the sliding grooves in a limited mode, and expansion assemblies are mounted at the inner ends of the sliding blocks; and the abrasive paper sheet is extruded by the sliding block. By arranging the expansion assembly, when the second rolling wheel is adjusted, the abraded abrasive paper belt can be moved, the whole grinding head does not need to be replaced by adjusting the position of the abrasive paper belt, and therefore the problem that when a traditional integrated grinding head is abraded to a certain degree, the whole grinding head needs to be replaced is solved. The grinding head is not fully utilized; and the material is wasted. And when the grinding range of the fixing base is adjusted, the second rolling wheel can compensate the length of the abrasive paper belt, and therefore the abrasive paper belt adjusting stability is further improved.

The invention belongs to the technical field of grinding equipment, and particularly relates to a welded pipe mold cambered surface smoothness accurate grinding device which comprises a workbench, a fixing assembly is arranged on one side of the upper end of the workbench and comprises two first circular plates arranged at the upper end of the workbench in a sliding mode, and an accurate grinding assembly is arranged on one side of the fixing assembly. The accurate grinding assembly comprises an arc-shaped plate slidably arranged at the upper end of the workbench, the side, close to the first circular plate, of the arc-shaped plate is wrapped with abrasive paper, second rectangular strips are rotatably arranged at the two ends of the side, away from the abrasive paper, of the arc-shaped plate, and a third rectangular strip is arranged between the second rectangular strips. A fourth rectangular strip is fixedly connected to the end, away from the arc-shaped plate, of the third rectangular strip, a second rectangular hole is formed in the position, corresponding to the third rectangular strip, of the fourth rectangular strip, and the third rectangular strip is slidably arranged in the second rectangular hole. And the practicability is low.

A crack tip deformation in-situ measurement method based on sub-reference image splicing matching DIC includes the steps that firstly, the two sides of a compact tensile CT test piece are processed, one side is polished through abrasive paper, speckle spraying is conducted on the other side, a microscopic camera moves in the crack growth direction at the same step length, and multiple speckle images are shot; obtaining a whole-field reference image by using an image splicing technology, and obtaining a reference image corresponding to any position on a crack propagation path in cooperation with a template matching technology; speckle images collected in the hysteresis influence interval are matched with a global reference image, a corresponding reference image is captured, data of a crack tip displacement field and a smooth surface image shot by a camera on the other side are analyzed through a DIC technology to obtain a crack tip morphology change trend, and a result is further calculated through the data. According to the method, the Qamp is obtained at low cost; in the P steel crack propagation process, the deformation field of the crack tip and the crack morphology change under any crack length in an area are affected by overload hysteresis.

The invention belongs to the technical field of surface strengthening, and particularly relates to an aluminum alloy friction stir welding seam fatigue-free method based on rolling strengthening. The method comprises the following steps: (1) carrying out a microhardness test and a tensile test on an aluminum alloy matrix to obtain the hardness and tensile strength of the matrix; and (2) friction stir welding is conducted. The tensile strength after friction stir welding is not lower than 65% of the fatigue strength of a base body by adjusting friction stir welding process parameters; and (3) the surface of the friction stir welding part is treated. The surface of the welding seam is polished through an angle grinder and abrasive paper, so that the surface roughness of the welding seam reaches about Ra1.2 microns; and (4) rolling surface strengthening is carried out. Surface strengthening process parameters are adjusted, so that the surface hardness of a heat affected zone of the weld joint subjected to surface strengthening is not lower than the surface hardness of a matrix, the surface roughness Ra is not higher than 0.5 mu m, and the surface residual compressive stress is not lower than 100 MPa; and (5) carrying out a fatigue test.

The invention discloses a silicon carbide screening device for abrasive paper production, and belongs to the technical field of abrasive paper production equipment.The silicon carbide screening device comprises a base, a feeding mechanism, a screening mechanism, a driving mechanism and a receiving mechanism, the screening mechanism comprises a circular screening frame and a screening net fixedly installed in the circular screening frame, and an annular frame is fixedly installed at the top of the base; a fixing ring is fixedly installed on the outer side of the circular screen frame, and a plurality of connecting springs are fixedly installed between the annular frame and the fixing ring. The feeding mechanism comprises a feeding hopper, a driving motor, a mounting box and two rotating shafts, and the mounting box is fixedly mounted at the bottom of the feeding hopper. By means of the feeding mechanism, silicon carbide materials can be evenly distributed and efficiently scattered, silicon carbide is evenly distributed on the screen, the screening rate is increased, the feeding rate can be automatically adjusted according to the storage amount and the caking degree of the silicon carbide on the screen, the discharging rate is monitored in cooperation with the material receiving mechanism, and the screening efficiency is improved. And the stable screening speed can be conveniently maintained.

The invention relates to the technical field of workpiece grinding, in particular to an annular workpiece grinding device which comprises a base, a fixing assembly is arranged in the middle of the top face of the base, a vertical connecting rod and a fixing side plate are integrally formed on the edge of the top face of the base, and a workbench is fixedly connected to the top end of the vertical connecting rod. A linear sliding groove is formed in the middle of the workbench. According to the improved grinding device, the circular ring workpiece is fixed, centered and rotated through the fixing assembly, then the grinding assembly is started to drive the grinding abrasive paper to do circular motion around the outer surface of the circular ring workpiece, and the circular ring workpiece is ground. The grinding head can be avoided without halting to adjust the position of the circular ring workpiece or switching the clamp, a large amount of time is saved, the possibility that deviation is generated due to displacement of the circular ring workpiece when the clamp is switched is eliminated, the workpiece can be automatically cooled when the grinding assembly operates, and grinding powder is blown off from the surface of the workpiece.

The invention provides a zirconium alloy metallographic specimen preparation method which comprises the following steps: (1) pretreatment: intercepting a specimen, avoiding a heat affected zone, and removing greasy dirt on the surface of the specimen; (2) mechanical grinding, wherein the mechanical grinding comprises step-by-step grinding by using metallographic abrasive paper; (3) chemical polishing: chemical polishing comprises the steps of preparing a chemical polishing solution, soaking the sample in the solution and cleaning and wiping the sample, and the chemical polishing solution comprises nitric acid, hydrofluoric acid, oxalic acid and deionized water which are mixed and placed in a polyethylene container; and (4) post-treatment: placing the sample in a nitrogen protective atmosphere furnace, forming an oxide layer on the surface of the sample, and removing residual oxide particles. According to the method, nitric acid, hydrofluoric acid, oxalic acid and deionized water are mixed and placed in a polyethylene container, and the sample is chemically polished, so that the metallographic test piece of the zirconium alloy can be safely and effectively treated, and observation and analysis of a metallographic structure are guaranteed.

The invention relates to a surface strengthening method for improving the rotary bending fatigue strength of shaft steel, which comprises the following steps: step 1, pretreatment: carrying out finish machining on the shaft steel, polishing the shaft steel with abrasive paper, then cleaning a sample with acetone and absolute ethyl alcohol solvents to remove oil stains and impurities on the surface, cleaning the sample with an ultrasonic cleaning machine, and air-drying the cleaned sample; and 2, electric pulse auxiliary ultrasonic surface rolling treatment is conducted, the sample is clamped on a lathe, currents are connected to the two ends of the sample through a pulse power source, technological parameters are set, lubricating oil is adopted for lubrication in the rolling process, the surface of the sample is machined for multiple times, and the surface-strengthened shaft steel sample is obtained. According to the method, a gradient plastic deformation layer, a hardened layer and a residual stress layer are introduced by adopting a mode of treating the surface of the shaft steel through electric pulse-assisted ultrasonic surface rolling, so that the expansion of cracks can be obviously inhibited, and the rotary bending fatigue strength of a sample can be effectively improved while the surface hardness and the residual stress are improved.

The invention relates to the field of hole sealing agent quality detection, in particular to a nickel-free medium-temperature hole sealing agent drying abrasion resistance detection device and method based on visual image intelligent sensing, and the device comprises a rack which is provided with a visual detection device and a rotating frame capable of rotating; the two sets of supporting structures are rotationally installed on the rotating frame, each supporting structure comprises a plurality of sets of first arc-shaped pieces and second arc-shaped pieces which are circumferentially arranged at equal intervals, and the first arc-shaped pieces and the second arc-shaped pieces can form a cylindrical structure; when the rotating frame rotates, one set of cylindrical structures can be kept in a first state or a second state, and when the cylindrical structures are in the first state, the annular abrasive paper can be driven to rotate; the traction assembly is connected with the first arc-shaped pieces and the second arc-shaped pieces, in the second state, the traction assembly can drive the multiple sets of second arc-shaped pieces to move close to one another, after the second arc-shaped pieces move by a preset distance, the multiple sets of first arc-shaped pieces are driven to move close to one another, and the detection process is simplified.

The present invention provides a strengthened glass ceramic and a preparation method and application thereof, the strengthened glass ceramic contains a petalite crystal phase and a lithium disilicate crystal phase, the strengthened glass ceramic has a compressive stress layer formed by chemical strengthening on the surface and a tensile stress layer inside, and the strengthened glass ceramic satisfies: (CS50 / DOL0) > = 0.332 * (surface CS / CTCV); dOL0 is greater than or equal to 0.187 t; 1.01% > = delta alpha > = 0.65%, and delta alpha = 5 * 10 <-5 > * CTAV + 0.0026. Under the condition of 80-mesh abrasive paper, the average height of the reinforced microcrystalline glass in falling failure can reach 1.30-1.80 m. Compared with the prior art, the reinforced microcrystalline glass disclosed by the invention has the advantages that the breaking resistance on rough ground is obviously improved, and the reinforced microcrystalline glass can be used as a protective cover plate material of intelligent terminal products such as mobile phones.

The invention discloses a method for prolonging the service life of a resistance spot-welding electrode, a manufactured resistance spot-welding electrode cap and application, and the method comprises the following steps: taking a chromium-zirconium-copper electrode cap as a base body, grinding the working surface of the base body step by step by adopting abrasive paper, and then sequentially polishing, ultrasonically cleaning and drying to obtain a pretreated base body; performing vacuum zirconium permeation treatment on the pretreated matrix by adopting a permeation agent so as to form a zirconium-rich solid solution diffusion layer in the pretreated matrix, thereby obtaining the matrix subjected to zirconium permeation reinforcement; physical vapor deposition treatment is adopted, and a metal transition layer is deposited on the surface of the solid solution diffusion layer of the matrix subjected to zirconium permeation strengthening; wherein the metal transition layer is a Cr transition layer or a Ti transition layer; and a graphite target and titanium target co-sputtering mode is adopted, and a composite gradient functional layer is sputtered and deposited on the surface of the metal transition layer of the matrix treated in the step S3. The electrode service life of the method is improved by magnitude order, and the effect is extremely remarkable.

The invention relates to back velvet abrasive paper processing equipment, and belongs to the technical field of abrasive paper production equipment. Comprising a rack, a material rolling assembly, an auxiliary roller changing assembly, a material cutting assembly and a transferring assembly. The material rolling assembly is installed on the rack and used for rolling materials, and two sets of rolling parts which are detachably installed are arranged on the material rolling assembly and can rotate; the auxiliary roller changing assembly is installed on the rack in a sliding mode and assists the two winding parts to work alternately. The material cutting assembly is installed on the rack and used for cutting materials in the preset direction. The rotating center of the winding part transfers materials to the transferring assembly, and the transferring assembly transports and stacks the materials. The automation degree of material rolling and discharging is improved through the auxiliary roller changing assembly, the material rolling assembly and the transferring assembly which are automatically controlled, and the production efficiency is improved. And the two winding parts are arranged and are used for alternately winding and outputting the materials, so that the problem that in the discharging process of traditional equipment, the working progress of material winding is affected is solved.

The invention belongs to the technical field of coatings, and particularly relates to an anti-icing coating composition and a preparation method thereof. The icing-resistant coating composition is prepared from the following components: a component A, a component B and a component C, wherein the component A is prepared from the following components in percentage by weight: 50.0 to 70.0 percent of fluorocarbon resin, 0.5 to 1.0 percent of a de-foaming agent, 0.5 to 1.0 percent of a dispersing agent, 3.0 to 14.0 percent of xylene, 10.0 to 20.0 percent of titanium dioxide, 10.0 to 20.0 percent of microcapsule particles and 0.1 to 0.3 percent of a flatting agent; the component B is prepared from the following components in percentage by weight: 70.0 to 90.0 percent of an isocyanate curing agent and 10 to 30 percent of xylene; the mass ratio of the component A to the component B is 100: 15. Through the synergistic effect of the low-surface-energy fluorocarbon resin and the microcapsules, the efficient anti-icing / deicing effect is achieved, the contact angle of the coating can reach 110 degrees or above, and the coating still has good anti-icing capacity after being polished and damaged by 120-mesh abrasive paper.

The present invention provides a strengthened glass ceramic and a preparation method and application thereof, the strengthened glass ceramic contains a petalite crystal phase and a lithium disilicate crystal phase, the strengthened glass ceramic has a compressive stress layer formed by chemical strengthening on the surface and a tensile stress layer inside, and the strengthened glass ceramic satisfies: (CS50 / DOL0) > = 0.332 * (surface CS / CTCV); dOL0 is greater than or equal to 0.187 t; 1.01% > = delta alpha > = 0.65%, and delta alpha = 5 * 10 <-5 > * CTAV + 0.0026. Under the condition of 80-mesh abrasive paper, the average height of the reinforced microcrystalline glass in falling failure can reach 1.30-1.80 m. Compared with the prior art, the reinforced microcrystalline glass disclosed by the invention has the advantages that the breaking resistance on rough ground is obviously improved, and the reinforced microcrystalline glass can be used as a protective cover plate material of intelligent terminal products such as mobile phones.

The invention discloses a metallographic sample preparation method and device based on rotating speed grading regulation and control, and belongs to the technical field of metallographic grinding sample preparation. In the rough grinding stage, the rotating speed is set to be Va, and the lasting time is Ta; in the fine grinding stage, the rotating speed is set to be Vb, and the lasting time is Tb; in the polishing stage, the rotating speed is set to be Vc, and the lasting time is Tc; an abrasive paper annular three-area reuse strategy is adopted; according to the abrasive paper partition design, an abrasive paper disc is divided into three concentric ring areas, and from an outer ring to an inner ring, the mesh number range of the abrasive paper on the outer ring is P80-P240; the mesh number range of the abrasive paper of the middle ring is P320-P600; the mesh number range of the abrasive paper of the inner ring is P800-P1500; identifying and replacing, and transferring the sample to middle ring abrasive paper to perform accurate grinding operation when the outer ring abrasive paper is worn to be incapable of meeting the rough grinding effect; when the middle ring abrasive paper is abraded until the fine grinding effect cannot be met, the sample is moved to the inner ring abrasive paper to be polished; and the energy consumption is optimized.

The invention relates to the technical field of multifunctional super-hydrophobic materials, in particular to a photo-thermal super-hydrophobic anti-icing and deicing composite material based on a template collaborative ablation method, a preparation method of the photo-thermal super-hydrophobic anti-icing and deicing composite material and a photo-thermal super-hydrophobic anti-icing and deicing surface. The method comprises the following steps: uniformly dispersing photo-thermal nano-particles as a filler in a high-molecular polymer, forming a film with a micro-pit structure by using abrasive paper as a template through a pouring and curing film forming method, and forming nano-wrinkles or nano-particles similar to synapses on the micro-pit structure of the film through flame ablation treatment. The prepared photo-thermal super-hydrophobic anti-icing and deicing composite material based on the template collaborative ablation method has excellent photo-thermal and hydrophobic performance, can be used as a photo-thermal super-hydrophobic anti-icing and deicing surface, and is simple in preparation process, low in preparation cost and suitable for large-scale production.

The invention relates to an aviation titanium alloy laser shock peening and mechanical shot peening composite process strengthening method. The method comprises the following steps: cutting an aviation titanium alloy material into a plurality of square blocks and tensile fatigue parts by using a wire cutting machine; grinding with abrasive paper, and then polishing with a polishing agent, so that the surface of the aviation titanium alloy test material is smooth; carrying out laser shock peening treatment on one part of the aviation titanium alloy test material subjected to surface treatment; performing various detections on the aviation titanium alloy test material subjected to the same parameter and different impact strengthening times; the method comprises the following steps: carrying out mechanical shot blasting on an aviation titanium alloy sample with the best detection effect, carrying out mechanical shot blasting on part of original samples, then carrying out laser shock peening, and comparing the mechanical properties of the materials subjected to shock peening in different modes to obtain an optimal result. According to the method, two processes of mechanical shot peening and laser shock peening are combined, so that the fatigue resistance, the damage resistance and the stress corrosion resistance of the material are improved.

The invention discloses a polishing process for a door plate of a control cabinet. The polishing process comprises the steps of abrasive paper mounting, parameter setting, workpiece checking and fixing, polishing track setting, polishing, cleaning and detecting. The grinding device has the advantages that the movement track is set for the grinding mechanical arm, the grinding machine arranged at the end of the grinding mechanical arm is used for grinding operation, physical strength expenditure of grinding operators is reduced, labor intensity is lowered, rough grinding, accurate grinding and polishing can be completed at a time through the grinding mechanical arm, working efficiency is improved, frequent equipment replacement is avoided, and production cost is reduced. In addition, a polishing worker does not need to hold a polishing machine to directly contact with a workpiece for polishing, suction of polishing dust is reduced, the probability of occupational diseases is reduced, standardization of polishing operation is guaranteed through a fixing tool, consistency of surface treatment of the door sheet is guaranteed, the whole process guarantees high efficiency, safety and standardization of production, product quality is improved, and the production cost is reduced. The cost is reduced.

The invention relates to the technical field of metal round pipe machining, in particular to an end face cutting device for metal round pipe machining, which comprises a bottom plate, supporting legs are fixedly mounted on the bottom surface of the bottom plate and close to four groups of corners, and a first groove and a second groove are formed in the surface of the upper end of the bottom plate in a penetrating manner. According to the round pipe cutting device, cutting of a round pipe body is completed, the cutting end face of the round pipe body is automatically polished and deburred, the working efficiency of cutting machining of the round pipe body is improved, multi-direction polishing is achieved, the polishing effect is improved, and by arranging a pushing mechanism, abrasive paper generates an annular recess to be attached to the inner edge and the outer edge of the end face of the round pipe body; and a cleaning mechanism is arranged, so that ground chippings adhering to the surface of the abrasive paper can be well and comprehensively removed, and the situation that the chippings adhere to the abrasive paper, shield the abrasive paper and affect the grinding effect on the circular pipe body is avoided.

The invention discloses a micro-texture cutter with a TiO2 coating and a preparation method of the micro-texture cutter, a base material of the cutter is hard alloy, a multi-orientation rhombic micro-texture is machined on a front cutter face, and the coating is the TiO2 coating with the nanoscale thickness; the preparation method comprises the following steps: pretreating a hard alloy matrix, and grinding and polishing the surface of the hard alloy by adopting diamond abrasive paper to enable the hard alloy to be in a mirror surface state; a multi-orientation rhombic microstructure is machined on the surface of the hard alloy cutter base body through a laser machining method; depositing a TiO2 coating on the textured surface by adopting an atomic layer deposition method; and the coating is subjected to annealing post-treatment in a nitrogen atmosphere. The contact area between the cutter and cuttings is reduced through the microtexture, the cuttings and coating falling particles are efficiently collected, and therefore the friction condition in the cutting process is improved. The tool is suitable for cutting operation of low-hardness metal materials, the service life of the tool is prolonged, and the cutting machining efficiency is improved.

The invention discloses a machining device and method for a guide fillet of a sealing structure. The machining device comprises a grinding head, abrasive paper and a positioning shaft, the grinding head is provided with a positioning cylinder and a rotary grinding face, and the rotary grinding face is formed by taking an inner concave arc R as a contour edge and taking the axis of the grinding head as a rotating shaft. Before a guide fillet is machined, abrasive paper is marked along the contour of a cutting sample plate and cut, then the abrasive paper is pasted to a grinding head through glue, a positioning shaft is inserted into a pipe joint, the grinding head is clamped through a handheld electric drill, a positioning cylinder is inserted into a positioning round hole of the positioning shaft, and the grinding head is pressed to a to-be-machined position for grinding; and finally, metallographic abrasive paper is used for polishing the ground round corner, and alcohol is used for cleaning the ground round corner. By the adoption of the guide fillet machining device and method, the problems that repair is difficult and the repair qualification rate is low after the guide fillet is missed to be machined can be solved.

The utility model provides a grinding device which comprises a grinding medium disc, and grinding materials are arranged on the grinding medium disc. The moving platform is used for bearing the grinding medium disc and driving the grinding medium disc to move along a certain track; the driving mechanism provides driving power for the motion platform; the base is used for supporting the motion platform; the grinding disc is used for keeping the workpiece to abut against the grinding material on the grinding medium disc; the track is formed by superposition of x-axis simple harmonic motion and y-axis simple harmonic motion. According to the grinding device, only simple harmonic motion of the motion platform is executed, symmetrical grinding of the workpiece can be achieved, and the grinding effect of the workpiece is more centrosymmetric; in addition, the traversal degree of the motion trail formed by the grinding action to the abrasive paper is high, and the abrasive paper can be fully utilized without additionally arranging other linear motion driving devices.

The invention belongs to the technical field of welding, and relates to a welding and detecting integrated workbench for manufacturing a robot. The device comprises a supporting table, a welding robot, a mounting mechanism and a detection mechanism, a limiting groove is formed in the supporting frame, the fixed frame is rotationally installed on the supporting frame, and the sliding frame is in sliding connection with the fixed frame. The end part of the sliding frame is in sliding fit with the limiting groove; one side of the welding plate main body is fixed in the sliding frame; a support is rotationally installed on the fixing frame, and abrasive paper for cleaning welding slag is installed on the support. And by moving the guide plate, the welding plate main body can be turned over, so that the second surface of the welding plate main body can be welded conveniently, and the working efficiency can be improved. And in the process of turning over the welding plate main body, the abrasive paper moves along the welding seam to clean welding slag, so that the working efficiency is improved, and subsequent detection on the welding seam is facilitated. And the welding plate main body shakes up and down in the overturning process, so that welding slag can be shaken off easily.

The utility model belongs to the technical field of machining, and discloses a surface polishing device for a hard anodized layer of an aluminum alloy inner hole. One end of the mandrel and one end of the silica gel expansion sleeve are installed in a sealed mode; the other end of the silica gel expansion sleeve is fastened with the mandrel; the other end of the mandrel extends out of the silica gel expansion sleeve and is internally provided with a plug; the through hole is located in the outer circle of the mandrel in the silica gel expansion sleeve. Polishing abrasive paper is uniformly adhered to the silica gel expansion sleeve in the axial direction; and the actuating cylinder is sleeved outside the silica gel expansion sleeve. The pressure source is a pressure air source or a pressure water source. The aluminum alloy inner hole hard anodized layer surface polishing device can replace manual polishing, flexible expansion and contraction are achieved through the arrangement of the silica gel expansion sleeve, the polishing effect is good and even, the structure is simple, and economical efficiency is good.

The intelligent grinding and polishing system comprises a base system, and a detection equipment rapid replacement support, a grinding and polishing equipment rapid replacement support, an electric control system, a feeding and discharging system, a robot control system, an industrial robot and an automatic abrasive paper replacement system are sequentially arranged at the top of the base system. The detection equipment rapid replacement support, the grinding and polishing equipment rapid replacement support, the electric control system, the feeding and discharging system, the robot control system, the industrial robot and the automatic abrasive paper replacement system are fixedly installed on the top of the base system through bolts. According to the system, communication among a detection equipment rapid replacement support, a grinding and polishing equipment rapid replacement support, a dust removal system, a protection system, a feeding and discharging system, an industrial robot, an automatic abrasive paper replacement system, grinding and polishing equipment, detection equipment and the like can be achieved, and automatic tool replacement, automatic abrasive material replacement and automatic feeding and discharging can be achieved; robot control over the grinding and polishing process and technological parameters is achieved, and the grinding and polishing quality is guaranteed.

The invention relates to the technical field of laser welding equipment, and discloses a galvanized sheet laser welding device and method.The galvanized sheet laser welding device comprises a workbench and a welding gun, and the welding gun is movably installed on the workbench through a motion control mechanism. During use, the heights, the horizontal positions and the welding angles of the welding gun and the polishing abrasive paper are adjusted, the welding gun and the polishing abrasive paper are driven by the electric sliding rail to move synchronously, the external corner position of a to-be-welded part is polished by the polishing abrasive paper in the moving process, and after welding is finished, the polishing abrasive paper and the cleaning abrasive paper are driven by the turnover mechanism to conduct position exchange. And in the reset process, the welding seam is cleaned, surface impurities are removed, in the lifting process of the rectangular plate, a cleaning roller brush can be driven to rotate through the arrangement of a cleaning mechanism, so that polishing abrasive paper or cleaning abrasive paper attached to the cleaning roller brush is cleaned, surface metal chippings are removed, and the better polishing and cleaning effects are achieved in the subsequent use process.

The invention discloses a method for rapidly preparing a metallographic structure of a hard alloy and steel brazed part, which comprises the following steps: welding hard alloy and steel, linearly cutting along a direction vertical to a welding trace, and taking the welded hard alloy and steel as a preparation sample; the first abrasive paper and the second abrasive paper are sequentially divided into three concentric circular ring areas including an abrasive paper outer ring, an abrasive paper middle ring and an abrasive paper inner ring from the edge to the center according to different rotating speeds of the first abrasive paper and the second abrasive paper in all the areas of the grinding machine. According to the method, the hard alloy and the steel are cut after being welded, and the cut sample is polished and washed after being polished for multiple times, so that the problem that metallographic structures are difficult to prepare from two welding samples with great hardness difference is solved; and common metallographic preparation materials and equipment are adopted, so that the microstructure of the welded part of the hard alloy and the steel can be rapidly prepared. And the problems of serious unclear structure and false phase in the metallographic phase preparation process can also be avoided.

The invention discloses a method for improving the current downloading capacity of an REBCO superconducting layer in a magnetic field, and belongs to the field of superconductor materials, and the method comprises the steps: depositing an auxiliary layer on the surface of the REBCO superconducting layer, and carrying out the rotary grinding of the auxiliary layer on abrasive paper in cooperation with a cleaning solution, so as to introduce high-density dislocation into the REBCO superconducting layer, and cleaning the surface of the ground REBCO superconducting layer by using a cleaning solution, depositing a silver layer, and carrying out oxygen absorption treatment to obtain the final REBCO superconducting tape. According to the technical scheme, the on-site performance of the REBCO superconducting layer can be improved at low cost.

The utility model provides an abrasive paper frame, and belongs to the technical field of polishing equipment. The abrasive paper frame comprises a base plate, more than two mounting seats are arranged on the base plate, each mounting seat is provided with a pressing piece and a clamping structure, each pressing piece comprises a connecting rod, each connecting rod is provided with a pressing block, and each connecting rod can be clamped in the corresponding clamping structure and enables the corresponding pressing block to abut against the base plate. According to the abrasive paper frame, the connecting rod of the pressing piece is clamped through the clamping structure, the abrasive paper is pressed and fixed through the pressing block on the connecting rod, operation is easy, and the abrasive paper is conveniently fixed.