409 results about "Sandpaper" patented technology

The invention relates to furniture plate laser cutting equipment and a cutting method, and belongs to the technical field of laser cutting machines.The furniture plate laser cutting equipment comprises a machining table, a cross beam is arranged on the machining table, a laser head is arranged on the cross beam, and the laser head is slidably arranged on the cross beam and slides in the length direction of the cross beam; the driving device is used for driving the cross beam to slide and driving the laser head to slide to cut a plate; a protective cover is arranged on the laser head, the protective cover is made of a transparent material, a shielding piece is arranged in the protective cover, and the shielding piece is used for forming a shielding barrier in the protective cover to weaken the light intensity; the protective cover is arranged in the laser head body in a sliding mode, the protective cover slides in the vertical direction and is contained in the laser head body, polishing abrasive paper is arranged on the bottom wall of the protective cover and the side wall close to the bottom wall, the protective cover is rotationally arranged in the laser head body, and a first driving piece used for driving the protective cover to rotate is arranged in the laser head body. The laser cutting device has the effect of improving the laser cutting safety.

The invention relates to the technical field of electric vehicle frame production, in particular to laser cutting equipment for electric vehicle frame production, which comprises a machine table, a pushing mechanism, a laser cutting machine and a discharging mechanism, according to the laser cutting equipment for electric vehicle frame production, by arranging the discharging mechanism, an inner supporting rod is driven to reciprocate, relative friction motion is formed between a bag body abrasive paper layer and a cutting area, high-temperature molten slag generated in the cutting process is removed in real time, and the situation that the high-temperature molten slag is condensed and solidified on the inner wall of a pipe fitting to form hard hanging slag is prevented; meanwhile, finishing machining is carried out on the cutting seam, and the surface roughness is controlled within Ra3.2 microns; in addition, a slag blocking area can be constructed through the annular sealing effect of the bag body, and splashing and diffusion of slag in the inner cavity of the pipe fitting are effectively restrained.

The invention discloses a preparation method of a novel mixed metal oxide coating titanium electrode, and relates to the technical field of electrode preparation, the method comprises the following specific steps: titanium substrate pretreatment: a titanium plate is sequentially subjected to gradient polishing with 120-800-mesh abrasive paper, the polished titanium substrate is subjected to hydrochloric acid solution etching, argon plasma surface activation and drying treatment, and a titanium substrate is obtained; obtaining a clean substrate surface with proper roughness; through the low-temperature plasma treatment, pulsed bias magnetron sputtering and laser-induced atomic layer deposition (LA-ALD) combined technology, the binding force of the coating and the titanium substrate is remarkably improved, high-energy particles are used for bombarding the surface of the titanium substrate in the low-temperature plasma treatment, residual impurities are effectively removed, the surface roughness and active sites are increased, and the surface hardness of the titanium substrate is improved. In the pulsed bias magnetron sputtering process, the surface of the substrate is further cleaned through periodic ion bombardment, atomic diffusion and mixing between the coating and the substrate are promoted, a transition layer structure is formed, and therefore the binding force is greatly enhanced.

The invention discloses a combined type wind power blade rear edge mold closing foam machining tool, and relates to the technical field of grinding equipment. Comprising a grinding machine control main body, a grinding driving mechanism is arranged at the left side end of the grinding machine control main body, a rotating plate is arranged at the lower end of the grinding driving mechanism, grinding abrasive paper is arranged below the rotating plate, a protective dust collection mechanism is arranged on the outer side of the rotating plate, and an auxiliary frame is arranged on the side wall of the grinding machine control main body. The closed grinding space is constructed through the protective dust collection mechanism, the elastic cover and the abutting ring are matched to seal the grinding area, the dust collection opening, the dust collection frame and the dust collection pipe are matched to form a negative pressure dust collection channel, foam chippings generated during grinding can be rapidly collected, and meanwhile the situation that the chippings are attached to the surface of a mold or a blade to affect the mold closing precision and the bonding quality is prevented. And the sweeping mechanism is matched with the vibration block and the supporting spring, and vibrates after the vibration block collides with the sweeping rod, so that the swept chippings are shaken off and are extracted from the dust suction opening, and the chipping cleaning efficiency is further improved.

The invention relates to the technical field of copper-aluminum bars, in particular to a copper-aluminum polymer diffusion hybrid welding method which is characterized by comprising the following steps: S1, welding nickel sheets with bare copper: compounding the nickel sheets with the thickness of 0.1-0.3 mm on the welding surfaces of the copper bars; s2, nickel sheet polishing: mechanically polishing the nickel sheet until the surface roughness Ra is less than or equal to 0.8 mu m; s3, the aluminum row is polished, specifically, the welding face of the aluminum row is polished in a one-way mode through abrasive paper of 800-2000 meshes till the roughness Ra is smaller than or equal to 1.0 micron; s4, copper and aluminum composite welding is conducted, specifically, the copper bar with the polished nickel piece and the polished aluminum bar are composited through polymer diffusion welding, the welding temperature is 400-500 DEG C, the pressure is 10-20 MPa, and heat preservation is conducted for 30-60 minutes; the nickel sheet with the proper thickness is compounded on the welding surface of the copper bar, the binding force of a welding interface is enhanced, then the nickel sheet is subjected to precise mechanical polishing, it is ensured that the surface roughness of the nickel sheet reaches the extremely low level, the welding surface of the aluminum bar is subjected to fine grinding treatment, and the adaptability of the welding surface is improved; and tight combination of the copper bar and the aluminum bar is achieved at specific welding temperature, pressure and heat preservation time, and practicability is high.

The invention discloses a high-alloy steel nitriding-laser quenching composite surface strengthening method which comprises the following steps: sequentially polishing the surface of high-alloy steel by using 240-mesh waterproof abrasive paper and 2000-mesh waterproof abrasive paper, then sequentially putting the high-alloy steel into ethanol and acetone for ultrasonic cleaning, and nitriding the pretreated high-alloy steel to form a nitriding layer; and cooling to room temperature along with the furnace under the atmosphere of nitrogen or ammonia gas to obtain the high alloy steel containing the nitriding layer. And blackening treatment is conducted in the atmosphere of argon or nitrogen, then laser quenching treatment is conducted, and high alloy steel surface strengthening treatment is completed. According to the nitriding-laser quenching composite surface strengthening process, the problems that a high alloy steel nitriding layer is shallow (smaller than 0.2 mm), interface brittleness is achieved, and the retained austenite content is high (larger than 20%) are effectively solved, the total treatment time is shorter than or equal to 16 h, the surface hardness of a modified layer is larger than or equal to 600 HV0.1, the thickness of the modified layer is larger than or equal to 1.5 mm, and the nitriding-laser quenching composite surface strengthening process is suitable for preparing key components such as aviation gears and heavy-duty bearings.

The invention discloses an ultra-precision polishing method for a thermoelectric material. The ultra-precision polishing method comprises the steps that S1, mechanical grinding and rough polishing are conducted on a thermoelectric material block through abrasive paper; wherein the abrasive paper sequentially uses metallographic abrasive paper with the abrasive particle mesh number from small to large; s2, diamond polishing paste or polishing liquid, CeO2 polishing liquid and Al2O3 polishing paste or polishing liquid are used as grinding materials, and mechanical polishing and fine polishing are carried out on the thermoelectric material block after mechanical grinding and rough polishing on a polishing machine; and S3, an alkaline SiO2 polishing solution or a water-based diamond polishing solution is used as a polishing medium, the thermoelectric material block subjected to mechanical polishing is subjected to repeated fine polishing and mechanochemical polishing on a polishing machine, and the thermoelectric material subjected to ultra-precision polishing is obtained. The surface roughness of the thermoelectric material obtained by the method does not exceed 1nm.

The utility model discloses a machining device for a guide fillet of a sealing structure, which comprises a grinding head, abrasive paper and a positioning shaft, and the grinding head is provided with a positioning cylinder and a rotary grinding surface which 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 adopting the guide fillet processing device, the problems of difficult repair and low repair qualification rate caused by missing processing of the guide fillet can be solved.

This disclosure provides a polishing apparatus, belonging to the field of machining. The polishing apparatus includes a fixed base, a polishing assembly, and at least one pair of guide assemblies. The polishing assembly includes sandpaper and two drive rollers, which are arranged in parallel and rotatably connected to the fixed base. The sandpaper is wound around the two drive rollers at both ends along its length, and has a polishing surface for polishing parts. Each of the at least one pair of guide assemblies is connected to the fixed base. Each pair of guide assemblies is symmetrically arranged on opposite sides of the sandpaper in the width direction between the two drive rollers, and each pair of guide assemblies is configured to bend the opposite sides of the sandpaper in the width direction between the two drive rollers toward the opposite side of the polishing surface. This disclosure can improve the polishing effect of parts.

The application discloses a kind of wood comb tooth automatic polishing processing equipment, including rack and automatic polishing control system, the rack is provided with feeder, manipulator, sandpaper assembly and unloading area, the feeder is used to convey comb embryo to the material taking position of manipulator, the manipulator is used to grab comb embryo and moves to sandpaper assembly and is polished, after polishing is completed, manipulator places comb embryo in unloading area, and the automatic polishing control system is used to control feeder, manipulator and sandpaper assembly to execute corresponding action to complete the automatic polishing of comb embryo.The equipment can replace traditional simple polishing equipment and polishing method, eliminate high-intensity manual labor, improve the processing consistency of comb tooth quality, and improve polishing operation efficiency.

The radome gluing and pressing equipment comprises a fixed seat, a pressing mechanism and a gluing mechanism are arranged above the fixed seat, a supporting plate is rotationally connected to the interior of the fixed seat, a rotating ring is coaxially and fixedly arranged on the upper portion of the supporting plate, a driving mechanism is arranged on one side of the supporting plate, and a grinding mechanism is arranged above the fixed seat; the grinding mechanism comprises a limiting plate fixedly arranged on the rear side of the top face of the fixing base, a movable block is slidably connected to the middle of the limiting plate, abrasive paper is arranged on the bottom face of the movable block, a first annular groove is coaxially formed in the top face of the rotating ring, and a plurality of guide blocks are fixedly arranged on the inner side wall of the first annular groove in an annular structure at equal intervals. A supporting spring is fixedly arranged between the rear wall of the movable block and the inner wall of the limiting plate; the rear side of the movable block is connected with an air bag, an air cavity is formed in the movable block, and a plurality of air outlets are formed in the bottom face of the air cavity. The radar cover bonding surface polishing device can polish the bonding surface of a radar cover before a gluing and pressing process, remove a weak'surface layer 'generated by a mold pressing process, and guarantee the bonding effect.

The utility model provides a kind of columnar wood flexible polishing device, including platform, the top of platform both sides is provided with movable rack, one movable rack inner wall is rotatably installed with clamping plate, another movable rack inner wall is rotatably installed with four jaw chuck, one movable rack outer wall is fixedly connected with servo motor, the transmission shaft of servo motor is movable and penetrates movable rack and is fixedly connected with four jaw chuck;The side of platform is connected with movable rod, the side wall of movable rod is connected with lifting plate, the bottom of lifting plate is movably connected with carrier plate, carrier plate bottom is connected with sponge block, and the bottom of sponge block is connected with sandpaper.The utility model can drive second limit sliding block to move by second electric push rod after a certain time of polishing when sandpaper of sponge block bottom is attached to columnar wood surface for polishing, so that the different positions of sandpaper can be replaced to attach wood surface for polishing, which is beneficial to avoid the accumulation of debris in the same position affecting the polishing effect, thereby facilitating efficient polishing.

The present invention relates to the technical field of rubber testing equipment, and specifically discloses a rubber wear resistance testing device, comprising a main structure, a friction structure and a fixed structure; the friction structure is fixedly arranged on the main structure, the main structure can drive the friction structure to rise and fall, sandpaper can be detachably installed on the friction structure, and the friction structure can change the shape of the sandpaper, the fixed structure is fixedly arranged on the main structure and is located below the friction structure, the fixed structure can contact the sandpaper on the friction structure, and the fixed structure is used to fix the rubber. The present invention integrates multiple testing functions into one, and can complete multiple types of plane, arc, rotation and other wear resistance tests without additional replacement of equipment components, significantly reducing the testing cost and improving the testing efficiency.

The invention provides an aluminum alloy pretreatment method based on complex reaction, which comprises the following steps: S1, polishing an LDH (Layered Double Hydroxides) growth surface by using abrasive paper, and cleaning and drying; s2, preparing a complexing agent solution, wherein a complexing agent is selected from at least one of tannic acid, gallic acid and protocatechuic acid; s3, the aluminum alloy sample treated in the step S1 is put into the complexing agent solution in the step S2, and constant potential is applied to the aluminum alloy; s4, preparing a mixed solution of Zn (NO3) 2.6 H2O and NH4NO3, and adding an ammonia water solution to adjust the pH value to 6-6.5; s5, immersing the aluminum alloy treated in the step S3 into the mixed solution in the step S4, and putting the aluminum alloy into a constant-temperature water bath kettle to generate a Zn-Al-LDH film; and S6, after the hydrothermal reaction is finished, cooling to room temperature, and washing and drying the obtained reaction product. The surface of the aluminum alloy is pretreated through the complexing agent, the potential between an intermetallic compound and an aluminum matrix can be effectively balanced, the micro-couple effect is fundamentally inhibited, and ideal conditions are created for uniform, compact and defect-free growth of LDH.

The utility model discloses a derusting device for welded pipe processing, which comprises a bottom plate, a vertical plate is fixed on one side of the upper surface of the bottom plate, a round hole is formed in the top end of the vertical plate, a rotating cylinder is rotatably connected in the round hole through a bearing, a clamping component is arranged in and outside the rotating cylinder, a top plate is fixed on the top end of the vertical plate, and the top plate is fixed on the top plate. A motor for driving the rotating cylinder to rotate is mounted on the upper surface of the top plate. According to the welding pipe polishing device, the bottom plate, the vertical plate, the rotating cylinder, the clamping assembly, the motor, the portal frame, the electric telescopic rod, the U-shaped frame and the polishing assembly are arranged, a welding pipe is fixed through the clamping assembly after being inserted into the rotating cylinder, then the polishing assembly is driven by the electric telescopic rod to descend, abrasive paper makes contact with the welding position of the welding pipe, and then the rotating cylinder is driven by the motor to rotate; and the clamping assembly can quickly fix the welded pipes with different diameters, so that the universality of the device is improved.

The application provides a sample polishing device, and belongs to the technical field of polishing equipment. The device comprises a supporting table, a positioning assembly and a polishing assembly arranged in sequence from bottom to top. The positioning assembly comprises rotating members and moving members respectively used for limiting two ends of a sample, and the rotating members and the moving members are respectively arranged at two ends of the top surface of the supporting table. The polishing assembly comprises a horizontal plate, a rack is arranged on the horizontal plate, a polishing member is arranged in the length direction of the horizontal plate, the polishing member comprises a rotating shaft, a gear is arranged at the upper end of the rotating shaft, a first bevel gear is arranged at the lower end of the rotating shaft, a second bevel gear coaxially arranged with the first bevel gear is arranged on one side of a roller arranged on a connecting seat, and a C-shaped block is vertically arranged on one side of the cantilever extension end. When the upper end of the C-shaped block is pressed against the rack, the gear is engaged with the rack, and the area of the annular sandpaper used for polishing is adjusted. The area of the annular sandpaper used for polishing the sample can be slowly adjusted during the polishing process, so that the grinding capacity of the annular sandpaper for polishing each part of the outer wall of the sample is consistent.

The invention discloses an automatic abrasive paper changing station for polishing, a polishing device and a control method, the automatic abrasive paper changing station for polishing comprises a storage mechanism, an unloading mechanism, an abrasive paper recognition mechanism and a rotation recognition mechanism, the storage mechanism comprises a storage rack, and the storage rack is provided with a storage bin channel; the discharging mechanism comprises an eccentric positioning assembly and a stripping clamping assembly, the stripping clamping assembly comprises a clamping table, a stripping clamping plate and a stripping clamping driving structure, the stripping clamping plate is provided with a stripping insertion end, the stripping clamping driving structure is used for driving the stripping insertion end to move towards the clamping table, and the eccentric positioning assembly comprises an eccentric positioning block and an eccentric buffering structure. A V-shaped eccentric positioning groove is formed in the end, arranged in the same direction as the stripping insertion end, of the eccentric positioning block, and the eccentric buffering structure is used for providing first positioning buffering force in the first direction for the eccentric positioning block so that the grinding head can be pushed to the set eccentric posture. The abrasive paper is automatically unloaded, whether the abrasive paper is unloaded from the grinding head or not is recognized, and the rotating posture of the grinding head and sand taking are recognized.

The utility model discloses a quick-change polishing head, which comprises a polishing seat and a polishing tool, the polishing seat comprises a seat body and a rod body connected to the back surface of the seat body, the front surface of the seat body is recessed inwards to form a positioning cavity, a hook surface body of a magic tape is arranged in the positioning cavity, the polishing tool comprises a buffer pad and abrasive paper, and the buffer pad is arranged on the rod body. A rough surface body of a hook-and-loop fastener is arranged on the upper face of the buffer pad, the buffer pad is positioned in the positioning cavity through the attachment of the rough surface body and the hook surface body, the grinding tool is quickly and accurately adhered to the grinding seat through the positioning of the positioning cavity, and during grinding, the grinding tool is limited through the positioning cavity, so that the grinding tool is prevented from being damaged. The condition that the grinding tool shakes or falls off in the grinding process is prevented, and then the grinding stability and safety are improved; meanwhile, the abrasive paper covers the lower surface and the peripheral surface of the buffer pad, so that the tool can polish the plane and the side surface of the workpiece at the same time, and the application range is greatly expanded; in addition, the grinding tool is quickly connected and detached with the grinding seat through the hook-and-loop fastener, so that the grinding tool is conveniently and quickly replaced, and the working efficiency is effectively improved.

The utility model discloses a polishing and grinding head which comprises a main shaft, an elastic assembly, a grinding head assembly and a locking piece, the main shaft is sleeved with the elastic assembly, and the main shaft is detachably sleeved with the grinding head assembly; the locking piece is rotatably connected with the main shaft and located at the end, away from the elastic assembly, of the grinding head assembly, the locking piece can rotate between a locking position and an unlocking position, when the locking piece is located at the locking position, the length direction of the locking piece is perpendicular to the length direction of the main shaft, and when the locking piece is located at the unlocking position, the length direction of the locking piece is perpendicular to the length direction of the main shaft. When the locking piece is located at the unlocking position, the unlocking position is that the length direction of the locking piece is parallel to the length direction of the main shaft. The purpose of rapidly replacing the abrasive paper outside the machine and rapidly replacing the grinding head assembly inside the machine can be achieved, so that rapid dismounting and rapid mounting of the grinding head assembly are achieved, the working efficiency is improved, the abrasive paper is replaced outside the machine, and the danger coefficient is reduced.

The invention relates to a repairable super-hydrophobic coating with high mechanical stability and a preparation method and application thereof, and belongs to the technical field of coating materials. In order to solve the problems that a super-hydrophobic coating is poor in mechanical stability and lack of self-repairing capacity, the invention provides a repairable super-hydrophobic coating with high mechanical stability, and the repairable super-hydrophobic coating with high mechanical stability mainly comprises epoxy resin, tetrapod-like zinc oxide, nano aluminum oxide, nano silicon dioxide, micron-sized carbon nanotubes and micron-sized aramid fibers. The three-dimensional surface micro-nano structure with longitudinal gradient distribution is constructed by simulating the micro-nano structure of the leg of the water strider, and the repairable performance can be achieved by exposing the similar micro-nano structure on the bottom layer through abrasive paper polishing. A firm and stable network micro-nano structure is formed in the coating, and the coating has excellent mechanical stability and corrosion resistance. The coating spraying method disclosed by the invention supports large-area rapid construction, is compatible with various base material types, and has a wide application prospect in the fields of self-cleaning, icing resistance and the like.

The utility model discloses a stepped hole bottom surface grinding device, which comprises an electric drill unit, a grinding unit, a grinding unit, a grinding unit and a grinding unit, wherein the electric drill unit is used for clamping the top end of a clamp body and rotating the clamp body; the positioning column is fixed on the middle part of the clamp body and is matched with the stepped hole; the polishing head is detachably fixed on the clamp body and is positioned below the positioning column; the grinding head is tightly attached to the bottom face of the stepped hole and used for grinding the bottom face of the stepped hole. The electric hand drill switch is started, the grinding head is rotated, and the bottom face of the stepped hole is ground; and the coarse gauze grinding head, the fine sandpaper grinding head and the felt grinding head are sequentially replaced, so that the roughness of the bottom surface of the stepped hole is less than or equal to 1.6, and the quality of the shell is ensured.

The invention discloses a novel metal test piece end face polishing and grinding device which comprises a test piece chuck, a pressing device, a straight driven piece, a plane cam, a movable sliding block assembly body, a linear guide rail structure and a movable frame. The test piece chuck comprises a dovetail matching block, a test piece chuck block, a pressing screw and a chuck fixing screw. The pressing device comprises a cover plate, a compression spring, a lifting block, a threaded pin and a rolling bearing; the straight follower comprises a lifting block, an indexing block and a limiting screw. By means of the novel metal polishing and grinding device, the problem that after traditional manual polishing and grinding equipment conducts polishing and grinding, cambered surfaces and fillets appear on the polishing and grinding end face is solved, the yield of metallographic samples and the utilization rate of consumable items such as abrasive paper are increased, a linear one-way polishing and grinding mode is researched, developed and provided, and a novel semi-automatic mechanical polishing and grinding device is designed.

This invention provides a rapid preparation method for steel samples for transmission electron microscopy (TEM), relating to the field of physical analysis of steel materials. It is applied to the preparation of various steel samples, including heat-sensitive steels, using a composite binder of cellulose acetate, acetone, silica, and alumina. The binder is used to adhere one side of a wire-cut steel sample sheet to the sheet fixing surface of a grinding aid. A grinding aid area, parallel to the bottom surface of the sheet fixing surface, is provided on the grinding aid device. The grinding aid area is pressed, and sandpaper with progressively increasing grit is used to grind one side until a first preset thickness is reached. Then, the other side is switched, and sandpaper with progressively increasing grit is used to grind the second side until a second preset thickness is reached. The ground sheet is removed, thinned, punched, and electropolished to obtain the target steel sample. This invention can rapidly prepare steel sample sheets with a thickness of 30-50 µm, and the method is simple and has a high success rate.

The utility model discloses a welding pin grinding device which comprises a bearing bottom plate, a first installation area and a second installation area are formed on the upper side of the bearing bottom plate, the first installation area is in a plane shape and used for laying abrasive paper, the second installation area is in a plane shape, and the second installation area and the first installation area are parallel or located on the same plane. The second mounting area is provided with a sliding module, the sliding module is fixedly connected with a welding pin fixing piece, the sliding module is used for driving the welding pin fixing piece to slide on a plane parallel to the second mounting area, the welding pin fixing piece comprises a welding pin mounting part, and the welding pin mounting part is used for mounting a welding pin and enabling the welding pin to be perpendicular to the first mounting area and the second mounting area; when the sliding module drives the welding pin fixing piece to slide, the welding pin installed on the welding pin installation part can slide on the abrasive paper in the mode of being perpendicular to the abrasive paper. The bottom flatness of the welding pin and the perpendicularity between the bottom plane of the welding pin and the side face of the welding pin can be improved, and the welding area of the welding pin is increased.

The utility model relates to the technical field of abrasive paper frames, in particular to a stable clamping abrasive paper frame which comprises a bottom plate, connecting plates are symmetrically arranged on the left side and the right side of the bottom plate, first through grooves extending in the length direction of the connecting plates are formed in the outer side walls of the connecting plates, and assembling plates are detachably arranged on the connecting plates. A first pressing plate which is parallel to the butt joint plate and can be inserted into the first through groove is arranged at the bottom of the assembly plate, second through grooves are symmetrically formed in the two ends of the top end face of the bottom plate, fastening plates are detachably arranged at the two ends of the bottom plate, and second pressing plates which can be inserted into the second through grooves are arranged on the bottom end faces of the fastening plates; the periphery of the abrasive paper can be pressed and fixed, the abrasive paper pressing area is increased, the abrasive paper is in a tight state, the flatness of the abrasive paper is guaranteed, the abrasive paper is prevented from shifting and falling off, the stability of the abrasive paper in the polishing work process is guaranteed, the service life of the abrasive paper is prolonged, and the use efficiency of the abrasive paper is improved. Therefore, the polishing progress is ensured.

The utility model relates to an abrasive cloth winding device which comprises a supporting plate, two parallel carrier roller frames are arranged on the supporting plate, carrier rollers are arranged on the two carrier roller frames, universal wheels are arranged at the bottom of the supporting plate, and a positioning frame is arranged on the outer side of the supporting plate. The positioning frame comprises a first side plate, a second side plate arranged at one end of the first side plate, a third side plate arranged at the other end of the first side plate and bottom plates arranged at the bottom end of the first side plate, the bottom end of the second side plate and the bottom end of the third side plate, and a bubble type gradienter is arranged at the top of the first side plate. A plurality of balance adjusting devices are arranged on the outer side of the positioning frame, and each balance adjusting device comprises a limiting plate, a supporting foot base and an adjusting bolt. And the levelness of the wind-up roller is convenient to adjust and is easy to feed back. The utility model has the advantages of convenient use and wide market prospect.

This invention discloses an optimized method for stator and rotor welding processes in the field of motor manufacturing, comprising the following steps: improving welding quality through pretreatment, coating with modified composite materials, and optimizing laser welding parameters. During pretreatment, the stator and rotor areas to be welded are sanded with 800-1200 grit sandpaper, followed by ultrasonic cleaning with acetone or alcohol for 10-15 minutes to achieve a surface roughness Ra ≤ 1.6 μm; a 0.1-0.3 mm thick layer of modified composite material is coated onto one surface and dried at 80-120°C for 1-2 hours; laser welding is employed, with the molten pool temperature monitored at 1800-2200°C during welding; immediately after welding, the welded parts are placed in a holding furnace at 200-300°C for slow cooling for 2-4 hours, and then cooled to room temperature at a rate of 5-10°C / min. This method effectively improves the strength, toughness, and crack resistance of the welded joint, reduces the heat-affected zone, and minimizes deformation.

The invention belongs to the field of material surface modification, and particularly discloses a preparation method and a product of a polymer super-hydrophobic surface, and the method forms the polymer super-hydrophobic surface which has graded roughness and contains low-surface-energy nano-particles through two times of hot stamping processes by utilizing the synergistic effect of secondary embedding of a metal net template and nano-particles. The static water contact angle of the obtained super-hydrophobic surface is larger than or equal to 156 degrees, the rolling angle is smaller than or equal to 5 degrees, the mechanical durability is excellent, and the contact angle attenuation rate lt after the super-hydrophobic surface is abraded by 600 # abrasive paper 500 times is achieved; the chemical performance is stable, and the self-cleaning performance, the anti-icing performance and the anti-fouling performance are achieved at the same time. The method is simple in process, low in cost and suitable for industrial production, and can be widely applied to the fields of bathroom equipment, anti-icing materials and the like.

The invention relates to the field of machine manufacturing, and discloses a precise manufacturing method of a sealing bowl for aviation and the sealing bowl, and the method comprises the following steps: calculating the size of a blank according to the structural size of the sealing bowl and a thermal change rule at a preset temperature; according to the calculated blank size, a polytetrafluoroethylene bar is adopted for turning to obtain a sealed bowl blank piece, and waterproof abrasive paper is adopted for polishing and removing burrs on the two sharp edges of the bottom and a lip opening of the sealed bowl blank piece; preheating the burr-removed sealing bowl blank, then loading the burr-removed sealing bowl blank into a coining die, pressing according to preset pressure, temperature and time, and taking out the sealing bowl blank part after pressing is completed; after the sealed bowl blank part is cooled, inner and outer lips of the sealed bowl blank part are cut, sharp edges are ground and cut for the second time, and the sealed bowl part is obtained; according to the invention, the smoothness of the lip of the part is obviously improved, and the consistency of the product size and the sealing performance after assembly are ensured.

The application discloses a kind of super-hydrophobic self-cleaning paint for mortar mixing barrel, coating and preparation method thereof.The paint includes, by mass fraction: epoxy resin 10-15 parts, epoxy modified silicone resin 5-15 parts, hydroxyl functionalized submicron alumina 15-20 parts, isocyanate functionalized nano-alumina 5-10 parts, dispersion medium 50-60 parts and auxiliary agent 0.5-2.5 parts.The application forms core-shell structure by two kinds of functionalized alumina chemical bonding, combines epoxy modified silicone resin, and constructs stable micro-nano composite rough surface.The coating prepared from the paint has static water contact angle of 165° or more, still maintains super-hydrophobic property after 50 times of sandpaper abrasion and 7 days of high temperature treatment at 180℃, and surface morphology is perfect after 50 days of simulated seawater immersion, solving the problem that existing coating is difficult to consider super-hydrophobic, wear-resistant, high-temperature resistant and corrosion-resistant property.