92 results about "Sand-paper" patented technology

The invention discloses a flexible piezoresistive sensor and a preparation method and application thereof, the flexible piezoresistive sensor comprises an upper layer flexible conductive member, the upper layer flexible conductive member comprises an upper layer flexible substrate and an upper layer conductive layer, one surface of the upper layer flexible substrate is provided with a microstructure formed by sand paper reverse molding, and the upper layer conductive layer is embedded in the surface of the microstructure; the lower-layer flexible conductive member comprises a lower-layer flexible substrate, a lower-layer conductive layer and an elastic conductive layer; the lower-layer flexible substrate is provided with an arc-shaped stripe array microstructure; the elastic conductive layer includes a polymer matrix and a conductive filler dispersed therein. Through the double-gradient design of the gradient conductivity and the gradient structure, the core contradiction that a traditional flexible piezoresistive sensor is difficult to consider high sensitivity and wide linear range at the same time is successfully solved by utilizing the deep coupling and synergistic effect of the conductivity gradient and the structure gradient, and synchronous improvement of the sensitivity and the linear range is realized.

The invention relates to the technical field of polishing equipment, in particular to golf ball head curved surface precision polishing equipment which comprises a mounting support, a ball head polishing mechanism used for ball head curved surface machining is arranged on the mounting support, a dustproof adsorption mechanism is movably mounted on the mounting support, and the ball head polishing mechanism comprises fixed bases symmetrically arranged on the mounting support. And a first telescopic rod is arranged on the fixed base. The ball head body is clamped and fixed through the first telescopic rod, the grinding disc assembly is driven by the rotating sleeve to rotate by 360 degrees in the circumferential direction of the ball head, the grinding disc assembly can be flexibly attached to different curvature areas of the ball head body in combination with telescopic adjustment of the second telescopic rod, and grinding blind areas caused by structural limitation of traditional equipment are avoided; in addition, the annular abrasive paper can be automatically turned over to wrap the edge of the circular disc body when encountering the sunken position, so that the side face of the grinding disc can also participate in machining, and the grinding precision and consistency of complex curved surfaces such as grooves and seamed edges are further improved.

The utility model discloses a wedge type valve grinding tool, which belongs to the technical field of grinding tools and comprises a base, a lifting seat arranged on the base, an angle adjusting component arranged on the lifting seat, a first motor arranged at a moving end of the angle adjusting component, a turntable fixedly connected to an output shaft of the first motor, and a second motor fixedly connected to the turntable. A first gear is fixedly connected to an output shaft of the second motor, the rotating disc is located between the first motor and the first gear, a plurality of first rotating shafts are rotationally connected to the rotating disc, second gears and a bonding disc are fixedly connected to the first rotating shafts, the second gears are located between the bonding disc and the rotating disc, and the second gears are wound around the first gear and engaged with the first gear; a horizontal moving assembly is arranged on the top of the base, a clamping assembly is arranged at the moving end of the horizontal moving assembly, and the clamping assembly is located below the rotary disc. According to the utility model, the abrasive paper on the bonding disc can rotate along with revolution of the turntable, so that the sealing surface of the valve plate is ground in multiple directions, and the grinding effect is improved.

The invention relates to the technical field of ring rolling machine maintenance, in particular to automatic repair welding and grinding equipment for a main roller of a ring rolling machine, which comprises a base, a support rod mounted on a support seat, a clamping component fixedly mounted on the support rod, a mechanical arm mounted on a rotary table, and a repair welding gun fixedly mounted on the mechanical arm; a first supporting plate and a second supporting plate are fixedly installed on the base, a first rotating roller and a second rotating roller are rotatably installed between the first supporting plate and the second supporting plate, a third rotating roller which vertically ascends and descends is arranged above the first rotating roller and the second rotating roller, and the first rotating roller, the second rotating roller and the third rotating roller are all sleeved with emery paper cylinders and make friction contact with a main roller of the ring rolling machine. According to the method, fatigue cracks on the outer wall of the ring rolling machine main roller can be repaired, meanwhile, the repaired ring rolling machine main roller can be precisely polished, the polishing roundness deviation is controlled within the standard range, potential safety hazards are eliminated, meanwhile, the service life of the ring rolling machine main roller is greatly prolonged, and production safety is guaranteed.

The invention relates to the technical field of grinding path optimization, and discloses an abrasive paper grinding path optimization system based on reinforcement learning. According to the system, a grinding task is decomposed through a task analysis module, and a state space is defined by fusing a current position, a historical track and real-time surface roughness through a state construction module. The strategy learning module utilizes a deep reinforcement learning network to carry out iterative training by exploring actions and collecting reward experience in simulation so as to learn an optimization strategy. And the trained network inferes local optimization paths for the sub-regions, and a global grinding path is formed after splicing and smoothing. According to the method, self-adaptive path planning is achieved through autonomous decision-making of reinforcement learning, closed-loop quality control is formed by means of real-time roughness feedback, and the intelligent level of grinding machining and the consistency of workpiece surface quality are improved.

The invention discloses a method for testing the concentration of chloride ions in reinforced concrete based on micron-sized X-CT and comsol finite element technologies. The method comprises the following steps: S1, preparing the reinforced concrete: treating reinforcing steel bars: selecting Q235 carbon round steel with the length of 20-30mm and the diameter of 5-8mm; and placing the reinforcing steel bar on a polishing machine, and polishing for 5-8 minutes by using SiC abrasive paper. According to the method, the micron-sized X-CT technology and the comsol finite element technology are combined, the limitation of a traditional testing method is overcome, the micron-sized X-CT technology provides a real image of the internal microstructure of the concrete, accurate basic data are provided for simulation analysis of comsol software, the testing result is closer to the actual situation, and the accuracy of chloride ion concentration testing is improved.

The utility model relates to the technical field of grinding machining, in particular to a grinding device. The polishing device comprises a cover plate; the driving mechanism comprises a supporting plate arranged adjacent to the cover plate and a driving assembly rotationally connected to the supporting plate, and the driving assembly is in driving connection with the cover plate; the plurality of follow-up assemblies are all arranged between the supporting plate and the cover plate, and the plurality of follow-up assemblies are used for connecting the supporting plate and the cover plate and are matched with the driving mechanism to drive the cover plate to move; the polishing piece is detachably connected to the side, away from the supporting plate, of the cover plate; the driving assembly is used for driving the cover plate to swing in the plane where the cover plate is located, so that the cover plate drives the grinding piece to swing, and then the grinding piece grinds the workpiece. The grinding device can grind the workpiece in a rubbing mode, fixed lines formed on the surface of the workpiece after the workpiece is ground are avoided, the utilization rate of abrasive paper is increased, and the grinding effect is improved.

The invention discloses a positioning polisher structure, and relates to the technical field of flange processing, the positioning polisher structure comprises a pneumatic or electric file tool, the pneumatic or electric file tool is provided with a fixing snap ring and a locking nut, one side of the pneumatic or electric file tool is provided with a rocker arm, and the other side of the pneumatic or electric file tool is provided with a nut. A fixing rod is installed on the fixing clamping ring, an M nut is installed on the outer side of the fixing rod, a positioning core is fixedly connected to the other side of the fixing rod, a vibration disc is installed at the bottom of the rocker arm, and an installation nut is installed at the top of the vibration disc. A positioning core is accurately inserted into a flange hole to position a flange face, then a pneumatic or electric file tool is used for being matched with a vibration disc and abrasive paper to precisely polish a flange, a clamping ring, a fixing rod, an M nut, a locking nut and other components are fixed to ensure the stability and precision of the polishing tool, and a rocker arm can be used for assisting in adjusting the polishing angle. And finally, the polishing precision is improved.

The utility model relates to a steel door core plate numerical control slitting device which comprises a machine tool body, the top end of the machine tool body is connected with a movable support in a sliding mode, the front face of the movable support is provided with a numerical control slitting device body, and the front face of the numerical control slitting device body is connected with a laser cutting head. After a user cuts the steel door core plate bodies, the user separates the two steel door core plate bodies, then the user can start the lifting rod, the free end of the lifting rod drives the base to descend, then the user starts the motor, the output end of the motor drives the lead screw to rotate, the lead screw drives the sliding support to move, and the sliding support is driven to move. And the reset springs push the two mounting plates correspondingly, so that the inner sides of the two steel door core plate bodies are polished through the polishing abrasive paper on the outer sides of the two mounting plates correspondingly, chippings left after cutting on the inner sides of the steel door core plate bodies can be cleared away, and the cut positions can be polished to be smoother.

The utility model relates to the technical field of aluminum alloy profile machining, in particular to an aluminum alloy profile preformed hole machining device which comprises a rack, a moving assembly and a drilling motor and further comprises a polishing assembly. The grinding assembly comprises a mounting seat, a driving component, a lifting seat, a spring, an abutting plate, grinding abrasive paper and a winding component, the lifting seat is driven to descend through the driving component, then the abutting plate and the grinding abrasive paper are driven to descend, and after the abutting plate abuts against the surface of the aluminum profile, the abutting plate abutting against the surface of the aluminum profile shrinks and then retracts into the lifting seat; and the abutting plate located at the aluminum profile groove continues to move and drives the polishing abrasive paper to stretch into the groove so as to abut against the preformed hole in the groove, at the moment, the driving component drives the lifting base to move in a reciprocating mode, then the abutting plate and the polishing abrasive paper are driven to move in a reciprocating mode, and burrs at the aluminum profile preformed hole are polished through the polishing abrasive paper.

The utility model provides a breather valve seat grinding device which is used for grinding a breather valve seat. The breather valve comprises a shell, a valve seat and a valve disc. The valve seat and the valve disc are both arranged in the shell, the valve disc is arranged on the top end face of the valve seat, and the valve disc can be far away from the valve seat so that an air channel can be formed between the valve disc and the valve seat. The breather valve seat grinding device comprises a grinding head assembly, a transmission assembly and a driving source, the grinding head assembly is connected with the driving source through the transmission assembly, and the grinding head assembly is used for grinding the top end face of a valve seat; the grinding head assembly comprises a grinding disc, a pressing plate, a grinding sheet and a fastener, the grinding sheet is arranged between the grinding disc and the pressing plate, the grinding disc and the pressing plate are connected through the fastener, and the fastener is connected with the transmission assembly. The grinding sheet can be cut by adopting common and conventional abrasive paper, special customization is not needed, materials are convenient to obtain, and the use cost is low.

The utility model relates to the technical field of pre-stressed anchorage devices, and discloses a pre-stressed anchorage device for a bridge, which comprises an anchor backing plate, an anchorage device body is arranged on one side of the anchor backing plate, a stabilizing mechanism is arranged on one side of the anchorage device body, impurities on the surface of a steel line can be removed through an arranged reminding mechanism and a sand paper cylinder in a cleaning sleeve, and after installation is completed, the steel line can be prevented from being damaged. A plurality of clamps need to penetrate through the steel line in sequence and are embedded in the front face of the anchorage device body, when the clamps are embedded in the front face of the anchorage device body, the anchorage device body can extrude the trigger plate, and the trigger plate can push the reminding plate and the stabilizing pad to move at the same time; a user can judge whether the clamp is installed in place or not by observing whether the reminding plate is inserted into the limiting buckle or not, meanwhile, the movement of the stabilizing pad can enhance the extrusion of the stabilizing point to the hole in the bridge, and therefore the friction force between the anchorage device body and the hole is improved, and the installation stability and reliability are ensured.

An adapter device for a power tool, in particular a multifunctional power tool that is able to be driven in an oscillating manner, has at least one machine interface for connecting to the power tool, in particular to a tool receptacle of the power tool, and at least one tool interface for connecting to a sanding tool, in particular to a sanding sheet. The machine interface have has a connecting plane which encloses an angle other than 0°, 90° and 180° with a connecting plane of the tool interface.

The utility model discloses a pneumatic floating polishing head, which relates to the field of automobile part manufacturing and comprises a fixed plate, a movable seat is slidably connected to one side of the fixed plate, guide columns are symmetrically and fixedly connected to one side, far away from the fixed plate, of the movable seat, sliding blocks B are slidably connected to the outer sides of the guide columns, and springs are sleeved on the outer sides of the guide columns. The sliding block B is elastically connected with the movable seat through a spring, a lifting seat is arranged on one side of the movable seat, the sliding block B is fixedly connected with the lifting seat, and a pneumatic polishing head is installed in the lifting seat. And the pressure is transmitted to the pneumatic polishing head through the lifting seat, so that upward buoyancy generated by rotation of the polishing head is reduced, the abrasive paper can be more uniformly attached to the surface of the workpiece, and the uniformity and smoothness of the polishing effect are ensured.

The application provides an electrolytic polishing method for a zirconium alloy and stainless steel welded joint EBSD sample, which comprises the following steps: (1) cutting a zirconium alloy and stainless steel welded joint sample to be detected; (2) mechanically polishing the cross section of the welded joint by using sandpaper; (3) preparing an electrolytic polishing solution; (4) placing the polished sample in step (2) into the electrolytic polishing solution in step (3) to perform electrolytic polishing treatment; (5) placing the sample after electrolytic polishing in step (4) into a container containing alcohol, ultrasonic cleaning the container containing the sample for 5 min, and then taking out the sample and blowing cold air by using a hair dryer until no water stains are left, so that the EBSD sample with a smooth and bright surface is obtained. By adjusting the proportion of the electrolytic polishing solution and optimizing the electrolytic polishing process, the polishing and stress layer removal of the cross section of the zirconium alloy and stainless steel welded joint sample are realized, and the EBSD sample detection calibration rate is high.

The present invention relates to a cutting, drilling and grinding combination machine tool for processing furniture panels, comprising a bed, an X-axis travel mechanism, a Y-axis travel mechanism, a Z-axis travel mechanism, and a processing head. The processing head comprises a cutting station, a drilling and grinding station, and a dual-output shaft motor. The drilling and grinding station comprises a main shaft, the lower end of which is detachably connected to a drill bit or a grinding disc. The top of the bed is provided with at least one set of ultrasonic megasonic bearing platforms for generating ultrasonic vibration and megasonic vibration and adapting the ultrasonic vibration and megasonic vibration. The present invention has multiple functions of cutting, drilling and grinding, and can process both metal panels and wooden panels, and can effectively improve processing efficiency and processing quality; the cutting operation is performed by cooperating with the cutting station and the ultrasonic megasonic bearing platform, which can significantly improve the chip removal capacity of the saw blade; the drilling operation is performed by cooperating with the drilling and grinding station and the ultrasonic megasonic bearing platform, which can increase the drilling rate and reduce the wear of the sandpaper.

This invention discloses a surface grinding device for motor stator cores, belonging to the field of motor stator core grinding technology. It includes a rotary drive component for driving the stator core to rotate, and a surface treatment structure on the rotary drive component. The surface treatment structure includes a grinding assembly and a power component for driving the grinding assembly to rotate. The grinding assembly includes several execution units. During the grinding process of the motor stator core sidewall surface, the insulating coolant filled in the base box mechanism of the execution unit cools the grinding area. This not only effectively extends the service life of the sandpaper assembly in the grinding device but also effectively suppresses irregular thermal expansion of the stator core during grinding, preventing excessive tool feed and ensuring the grinding accuracy of the motor stator core, thus improving the production yield of motor core products.

The invention relates to the technical field of generator equipment, in particular to a portable generator carbon brush polishing device which can be applied to replacement of a collector ring carbon brush of a generator in the power industry. Four suckers adsorbed on the ground are arranged at four corners of the lower surface of the supporting plate; a carbon brush polishing arc-shaped template is connected to the front side of the upper end surface of the supporting plate; a screw rod for adjusting the arc radius is connected to the rear end of the carbon brush polishing arc-shaped template; an abrasive paper fixing clamp is mounted at the upper part of the carbon brush polishing arc-shaped template; wheels for swinging left and right are arranged at the bottom of the carbon block clamp, a grip is fixedly mounted on the carbon block clamp, a long screw is connected to the front end of the carbon block clamp, and an adjusting nut for adjusting the length is arranged at the other end of the long screw. The carbon brush polishing arc-shaped template can adjust the curvature by adjusting the long screw rod, can adapt to the size of a collector ring of a generator used by each power plant, and is wide in application range. The device can be used away from a production area, and is easy to protect, safe and easy to clean.

This invention discloses a rapid edge-grinding device for producing environmentally friendly bamboo cutting boards, belonging to the field of bamboo cutting board production technology. It includes a housing with open ends. The bottom of the housing has a mounting groove along its width. Grinding mechanisms are slidably mounted on both sides of the mounting groove. The mounting groove also includes a spacing adjustment mechanism that adjusts the distance between the two grinding mechanisms according to the thickness of the bamboo cutting board. This invention utilizes a grinding mechanism consisting of a U-shaped plate, a lower conveyor roller, a conveyor motor, an upper conveyor roller, a tension roller, and sandpaper symmetrically arranged on both sides of the mounting groove. Combined with a contact mechanism that adjusts the contact area between the sandpaper and the bamboo cutting board according to its thickness, and a spacing adjustment mechanism that adjusts the distance between the two grinding mechanisms according to the width of the bamboo cutting board, this allows the bamboo cutting board to be automatically edge-ground on its symmetrical sides after passing through the housing, eliminating the need for manual adjustment, thus improving practicality and grinding speed.

The utility model discloses an ambient air monitoring device. The environment air monitoring equipment comprises a vertical rod, a foundation is installed at the lower end of the vertical rod, and a display screen is installed on one side of the vertical rod; the vertical rod comprises a first rod body and a second rod body, and a connecting rod is arranged between the first rod body and the second rod body; the foundation comprises a bottom plate fixedly installed at the lower end of the vertical rod. The display screen comprises a display assembly and a frame used for fixing the display assembly. And the frame is rotationally mounted on the connecting rod. According to the environment air monitoring equipment, in strong wind weather, wind blows on the surface of the display screen to generate large thrust on the display screen, the display screen rotates under the action of wind power until the display screen is consistent with the wind direction, the stress on the two sides of the display screen is balanced and keeps consistent with the wind direction, and meanwhile, the display screen is not damaged. The possibility that abrasive paper doped in strong wind impacts on the display screen is smaller, and therefore damage to the display screen is reduced.

The utility model relates to the field of polishing devices, and particularly discloses a broach machining and polishing device which comprises a mounting base, an upper support is mounted on the upper surface of the mounting base, a broach is arranged under the upper support and located above the mounting base, a polishing mechanism is arranged above the broach, and a polishing frame is mounted in the polishing mechanism. Scrapers are installed on the lower surface of one end of the polishing frame in an array mode, a lower protrusion is installed on the lower surface of the other end of the polishing frame, pressing plates are arranged on the two sides of the lower protrusion, springs are connected between the pressing plates and the lower protrusion, and polishing abrasive paper is arranged on the outer side of the lower protrusion in an array mode. A scraping knife on the lower surface of the grinding frame is used for scraping the interior of a broach tooth groove, and in the continuous moving process of the grinding mechanism, it is guaranteed that burrs and lubricating oil on the inner side are scraped away, and after a wiping pad makes contact with the interior of the tooth groove, wiping is conducted; and finally, the inner sides of the tooth grooves are polished under the action of the multiple pieces of polishing abrasive paper arranged in an array, and the polishing efficiency is guaranteed.

The invention discloses PVC coiled material floor surface polishing and grinding equipment which comprises a winding and unwinding mechanism, the winding and unwinding mechanism comprises an unwinding structure and a winding structure, the unwinding structure comprises an unwinding roller shaft, the winding structure comprises a winding tooth block, a driving motor is installed at one end of the winding roller shaft, and the winding tooth block is connected with the unwinding roller shaft. The winding roll shaft is mounted at the output end of the driving motor in a transmission manner; and the tensioning mechanism comprises tensioning rollers, the number of the tensioning rollers is two, and the two sets of tensioning rollers are meshed with each other through tensioning tooth blocks. Through the arranged grinding and polishing mechanism, the whole device is driven to operate by only using a power source of a driving motor in the whole process, multi-stage gear transmission is achieved through the single driving motor, an abrasive paper wheel is made to rotate in an accelerated mode and conduct reverse grinding, and efficient and energy-saving synchronous grinding and polishing are achieved; and the problems of high energy consumption, high cost and low efficiency caused by a double-power-source design are avoided.

The intelligent sensing reciprocating grinding and polishing system comprises grinding and polishing equipment and detection equipment, the grinding and polishing equipment comprises a first mounting plate, a first quick-change disc is arranged in the first mounting plate, and the bottom of the first mounting plate is fixedly connected with a force control device through screws; the bottom of the force control device is fixedly connected with a reciprocating polishing machine through screws, a square abrasive paper disc is arranged at the bottom end of the reciprocating polishing machine, the detection equipment comprises a second mounting plate, a second quick-change disc is arranged in the second mounting plate, and a visual detection head is arranged at the bottom of the second mounting plate; the intelligent sensing reciprocating grinding and polishing system for the robot tail end can detect the coating thickness of a part, calculate grinding and polishing allowance distribution, solve the problems that the allowance distribution is not uniform and a robot is difficult to grind and polish, conduct visual scanning on the part, reversely generate a workpiece CAD model, generate a robot grinding and polishing program according to a real object CAD, and improve the grinding and polishing efficiency. The problems that errors between workpiece objects and design CAD are large, and robot programs are difficult to generate are solved.

The invention relates to the technical field of adhesive synthesis, in particular to polyurethane composite adhesive for waterproof abrasive paper and a preparation method of the polyurethane composite adhesive. Wherein the main agent comprises macromolecular phthalic anhydride type polyester polyol, micromolecular phthalic anhydride type polyester polyol, a chain extender, diisocyanate, ethyl acetate (EAC) and dimethyl carbonate (DMC), and the phthalic anhydride type polyester polyol is selected to synthesize polyurethane, so that the heat resistance and the wear resistance of the product can be remarkably improved; meanwhile, phthalic anhydride type polyester polyols with different molecular weights are selected for compounding, so that the cost is properly reduced, and the brightness of a final product can be adjusted; according to the preparation method provided by the invention, the main agent is used for preparing the solvent-type OH-terminated polyurethane adhesive through a-NCO insufficient method, the polyurethane composite adhesive with high hardness, good wear resistance, good flexibility and high curing speed is formed through the cross-linking reaction of the main agent and the curing agent, and the preparation method is simple in technological process and easy to prepare.

The application provides an instrument shell processing deburring device and relates to the field of instrument shell processing. The instrument shell processing deburring device comprises an operation table, a polishing disc is installed on the top of the operation table, a through hole is formed in the middle of the polishing disc, a main shaft is rotatably connected to the middle of the operation table, the top end of the main shaft penetrates through the through hole in the middle of the polishing disc and is installed with a rotating disc, a pair of curve grooves which are symmetrical about the center point of the rotating disc are formed in the inside of the rotating disc, and the inner end notches of the curve grooves respectively extend towards the direction of the center point of the rotating disc. The instrument shell is pushed to move on the polishing sand paper through the curve grooves to realize polishing and deburring. Finally, the instrument shell is squeezed and pushed to the inner end notches in the form of "embracing" by the curve grooves to realize automatic discharging. Since the movement distance of each instrument shell is nearly consistent, the polishing and deburring degree can be uniformly good, and product control is facilitated.

The utility model provides a cutting device for abrasive paper processing, and relates to the technical field of cutting devices, the cutting device comprises an operation table, the outer surface wall of the operation table is fixedly connected with a fixing frame, and the inner surface wall of the fixing frame is provided with four first sliding grooves. According to the automatic abrasive paper feeding device, under the interaction of all the components of the device, the automatic abrasive paper feeding function is achieved, the problems of unstable feeding speed, large position deviation and the like caused by traditional manual conveying are effectively avoided, the cutting size precision is ensured, the product quality is remarkably improved, meanwhile, manual operation is reduced, and the production efficiency is improved. The problem that manual operation is low in efficiency is solved, the large-scale and high-efficiency production requirement is met, in addition, the two conveying belts can be promoted to rotate synchronously only through one power source, the transmission structure is greatly simplified, the equipment cost and energy consumption are reduced, the conveying requirements of abrasive paper with different thicknesses can be met by adjusting the positions of the two conveying belts, and the production efficiency is improved. And the application range of the equipment is widened.

The invention relates to the technical field of air cylinder maintenance, in particular to an aluminum thin-wall air cylinder barrel maintenance method which comprises the steps that a cylinder barrel is fixed, and a damaged area on the inner wall of the cylinder barrel is cleaned; the damaged area of the cylinder barrel is polished; multiple rounds of flame scanning are conducted on the grinding area, and the single-time scanning time is decreased progressively along with increase of the scanning frequency; cleaning and drying the heating area; the damaged area is coated with a filling agent and cured; and after first-time curing, grinding is carried out through raw abrasive paper till the piston is not blocked in push-pull, after second-time curing, grinding is carried out through fine abrasive paper till the piston is flush with an undamaged area, and after third-time curing, grinding is carried out through water wet polishing abrasive paper till the set roughness range is achieved. The limitation that the thin-wall cylinder barrel cannot be repaired after being damaged and deformed due to the thin cylinder wall is broken through, the maintenance working efficiency can be effectively improved, the maintenance time is shortened, and the maintenance cost is saved.

1. Name of the Design Product: Edge of a Sanding Machine Group 2. Use of the Design Product: Edge of a Sanding Machine Group 3. Design Key Points of the Design Product: Lies in the shape 4. Picture or Photograph that Best Illustrates the Design Key Points: Perspective View 1

The utility model discloses a crankshaft center hole chamfer cutting device, and particularly relates to the crankshaft cutting technical field, the crankshaft center hole chamfer cutting device comprises a base, a mounting rack is arranged above the base, a screw rod is arranged on the top of the mounting rack, a wheel disc is arranged at one end of the screw rod, and a mounting plate is arranged at one end of the screw rod far away from the wheel disc; one side of each fixing rod is provided with a connecting shaft, each connecting shaft is connected with one end of a connecting plate, the other end of each connecting plate is connected with a clamping block through the connecting shaft, each clamping block is located in a limiting groove, and the limiting groove is formed in the limiting disc. According to the crankshaft center hole chamfering and cutting device, the crankshaft center hole subjected to chamfering and cutting is cleaned by installing the burr knife, and the burr knife is provided with abrasive paper and a brush, so that the crankshaft center hole can be better cleaned.