447results about How to "Improve grinding precision" patented technology

The invention relates to a belt grinding processing method which can dress workpiece automation and a device thereof. And the invention is a dressing and grinding system formed by a set of automation equipments, adopts intelligent process to control, and realizes the automation dressing and grinding processing of the complex profile workpiece in the manner of grinding belts. The device of the invention comprises a control unit, an execution unit, a grinding unit, etc., sections; wherein, the control unit comprises a plurality of software modules; the grinding and dressing knowledge base is the key software module, which can generate automatically all the grinding parameters according to the grinding amounts of all the input points; and other software modules, for example, path correction module, generate actual processing path finally according to the parameters; the execution unit is a robot or a digital machine tool, which can receive the actual processing path of the control unit, and can generate machining track; the grinding unit is a belt grinder which can receive commands from the execution unit, and can finish the dressing grinding of the workpieces. The belt grinding processing method can be widely applied in the dressing grinding processing of the workpieces with variety of high-dimensional accuracy and complex profile.

The invention discloses a water-based glass grinding fluid which comprises a brominated alkyl quaternary ammonium salt surfactant, organic alcohol, a corrosion inhibitor and water. The water-based glass grinding fluid has excellent properties of cooling, lubricating, washing, corrosion preventing and the like, and has a better chemical dressing function on a diamond grinding tool; and according to the water-based glass grinding fluid, the grinding precision can be remarkably improved, the service life of the grinding tool is prolonged, and the greasy blockage of the grinding tool is effectively prevented. The water-based glass grinding fluid has good glass grinding efficiency, excellent chemical stability and low cost, has no harm to the health, does not pollute the environment, is convenient for use, and can be widely applied to the grinding and cleaning processes of various kinds of glass.

The invention relates to a loading device for sphere precise grinding. The loading device comprises a motor, a worm and a gear, wherein the worm is connected with an output shaft of the motor; the gear is engaged with the worm. The gear is connected with an upper grinding disc through a press block. A first spring is arranged between the press block and the upper grinding disc. A second spring is arranged between the worm and the press block. The press block is provided with a piezoelectric sensor for detecting the suffered pressure of the second spring. The piezoelectric sensor is connected with a controller. A pressure threshold value is preset in the controller. The motor is controlled by the controller. The invention has the advantages of high grinding precision, simple structure, accurate control in the grinding process, and low cost.

A high precision ball double rotation abrasive disk high efficiency grinding unit includes an upper abrasive disk, a lower abrasive disk and an inner disk of the lower abrasive disk arranged on a frame. The cone abrasive surface at the outer side of the inner disk of the lower abrasive disk and the cone abrasive surface at the inner side of an outer disk of the lower abrasive disk form a V-shaped slot structure which together with the upper abrasive disk forms three machining contact points of a grinding ceramics ball. The drive axes of any two parts in the upper abrasive disk, the outer disk of the lower abrasive disk and the inner disk of the lower abrasive disk are selected to be connected with an electric motor. The parts not connected with a drive motor machine a loading device. The invention can realize the relative orientation adjustment of a rotating axis and a revolution axis for a ball rough and realizes uniform grinding / polishing of the ball rough surface. The invention has the advantages of high machining precision, machining efficiency and machining consistency, and simultaneously the drive and transmission devices have been reduced from 3 to 2. The invention has a simple structure and is a grinding unit with less requirements for machining and assembling precisions.

The invention relates to a portable device for accurately repairing the wavy abrasion of a steel rail of a subway curve. The portable device comprises a laser distance measuring sensor (9), a grinding assembly (7), a driving assembly, a control assembly and a detachable machine frame, wherein the laser distance measuring sensor (9) detects the wavy abrasion of the steel rail of the subway curve, the grinding assembly is used for repair, the driving assembly and the control assembly drive the grinding assembly (7) to move in the X-axis direction, the Y-axis direction and the Z-axis direction, and all the components of the device are installed on the detachable machine frame. Compared with the prior art, the portable device can be installed on site and is manually pushed to move, for a designated spot, the portable device can actively and accurately repair the wavy abrasion of the steel rail of the subway curve, when the radius of curvature of the steel rail of the curve is small, radial deviation compensation can be accurately considered, re-forming can be easily and repeatedly conducted, the grinding assembly can move in the direction of the rail and in the radial direction of the rail and can accurately ascend and descend, the included angle between a grinding wheel and the steel rail can be adjusted, and the portable device has the advantages of being convenient to use, high in efficiency, low in cost, high in precision and the like.

The invention discloses a two-wheeled numerical control roll grinder and a numerical control method thereof. A small sliding frame of the double-wheeled numerical control roll grinder is provided with a U-axis micro-feeding mechanism, a main mechanical transmission case is lubricated by adopting an active lubricating loop, a cooling water purifying device is arranged on a grinder body, a large sliding frame guide rail is connected with a Z-axis guide rail hydraulic station through a lubricating oil tube, the Z-axis guide rail hydraulic station is subjected to dynamic pressure lubrication, a grinding wheel and an abrasive belt wheel are respectively connected with a shared mainshaft hydraulic station, a hybrid bearing and a capillary tube adjuster are respectively arranged at the front and the back of a main shaft of the grinding wheel and a main shaft of the abrasive belt wheel, and the mainshaft of the grinding wheel and the mainshaft of the abrasive belt wheel are subjected to dynamic and static pressure lubrication. According to the invention, due to adoption of a numerical-control setting manner, a roll curve is easy to change, ground workpieces are higher in quality and are easy to automatically control, the manual misoperation probability is lowered, a very excellent repeatable machining purpose is achieved and the quality of batch production can be ensured.

The invention discloses a high-precise ball highly-efficient grinding and polishing processing method, in the processing devices for realizing the processing method, a V-shaped groove is formed by a pyramidal face abrasive surface of the outer of an inner plate of a lower grinding plate and a pyramidal face abrasive surface of the inside of an outer plate of the lower grinding plate, a loading pressure device acts on a ball billet through an upper grinding plate, three processing contact points of the grinding ball are formed by the V-shaped groove and the upper grinding plate, the upper grinding plate, the outer plate of the lower grinding plate and the inner plate of the lower grinding plate share a same rotary shaft; a rotating shafts of two plates among the upper grinding plate, the outer plate of the lower grinding plate and the inner plate of the lower grinding plate are driven by an electric motor; relative orientation changing is carried out on a ceramic ball through adjusting the velocity combination of the omega[B] and omega[C], so that the grinding trails are distributed on the face of the ball uniformly, thus grinding the surface of the ceramic ball uniformly. In the invention, the higher processing precision and processing efficiency can be realized, and the processing device has simple structure and low manufacturing cost.

The invention discloses a drill bit grinding device and a testing method. The drill bit grinding device comprises a grinding wheel mechanism for grinding a drill bit, a control device for fixing and adjusting the position of the drill bit, and an image acquisition device for acquiring an image of the drill bit, wherein when the image acquisition device acquires the image of the drill bit, image acquisition points of the image of the drill bit are positioned at the inner side of the grinding wheel, namely the image acquisition points of the image of the drill bit are positioned at the inner side of the grinding wheel. The drill bit grinding device can test the status of the drill bit without moving the specific position of the outer side of the grinding wheel after grinding the drill bit, and can improve the work efficiency and grinding accuracy of the drill bit edge, thereby reducing the production costs.

An efficient grinding device of a double autorotation grinding disc of a high precision ball comprises a frame, a grinding disc device installed on the frame and a load pressure device; the grinding disc device comprises an upper grinding disc; the load pressure device is installed at the upper end of the upper grinding disc; the efficient double autorotation V-shaped groove grinding device of the high precision ball further comprises an inner disc of a lower grinding disc and an outer disc of the lower grinding disc; the outer disc and the inner disc of the lower grinding disc are coaxially arranged; the inner disc of the lower grinding disc is inserted in the outer disc of the lower grinding disc; a conical grinding surface on the outer side of the inner disc of the lower grinding disc and a conical grinding surface on the inner side of the outer disc of the lower grinding disc form a V-shaped groove structure; the outer disc of the lower grinding disc is fixedly installed on the frame; the upper grinding disc is installed on a rotating shaft; the rotating shaft is connected with a drive motor of the upper grinding disc; the inner disc of the lower grinding disc is installed on a main shaft; and the main shaft is connected with a drive motor of the lower grinding disc. The efficient grinding device of the double autorotation grinding disc of the high precision ball has the advantages of simple structure, low processing cost, higher processing precision and processing efficiency.

The invention relates to a composite grinding method of mechanical reciprocation and ultrasonic vibration. The superposition method of the mechanical reciprocation vibration and the ultrasonic vibration is adopted in the grinding procedure to drive the identical grinding head to grind the surface of a processed work piece, wherein, the mechanical reciprocation vibration and the ultrasonic vibration are superposed according the following motion parameters: the mechanical reciprocation vibration direction and the ultrasonic vibration direction are coaxially superposed, or the mechanical reciprocation vibration direction and the ultrasonic vibration direction are superposed inside the plane parallel to the surface of the processed work piece with an included angle; the frequency of the mechanical reciprocation vibration is 30 Hz to 300 Hz, and the frequency of the ultrasonic vibration is 20 KHz to 50 KHz; the amplitude of the mechanical reciprocation vibration is 0.1 to 10 mm, and the amplitude of the ultrasonic vibration is 0.02 to 0.05 times of the mechanical reciprocation vibration. The grinding method solves the problem that only the polishing of the work piece with a large area can be realized by the existing mechanical reciprocation grinding polishing, and only the polishing of the surface with a small area such as a corner, a slit, a narrow side, a quirk, and a die cavity with complex shape can be realized by the ultrasonic grinding polishing, and the grinding efficiency is low.

The invention discloses a grinding method for solar battery germanium substrate slices. The grinding method includes sequentially placing planetary wheels on a lower grinding disc in the clockwise direction to enable the planetary wheels to be meshed with an inner gear ring at the center of the lower grinding disc and an outer gear ring on the peripheral edge of the lower grinding disc, respectively placing germanium substrate slices with the front facing downwards into grooves of the planetary wheels, placing an upper grinding disc to enable the upper grinding disc to cling to the lower grinding disc and the upper surfaces of the planetary wheels, leading grinding liquid into the upper grinding disc, enabling the grinding liquid to flow through a through hole of the upper grinding disc to the germanium substrate slices on the planetary wheels, starting a grinder and conducting a grinding process which is divided into a slight pressing stage, a middle-pressure pressing stage, a lower-pressure pressing state and a grinding stage. Under the effect of the grinding faces of the upper grinding disc and the lower grinding disc and the grinding liquid, the grinding pressure is even, so that the machining quantity of the germanium substrate slices is easy to control, grinding precision is high, and the germanium substrate slice loss rate is 12-15 mum in the grinding process. Compared with manual grinding, the grinding method can control total thickness variation (TTV) to be within 2 mum and roughness to be within 0.8 mum. The grinding efficiency is twice as large as manual grinding efficiency, and the slice breaking rate is 1 / 10 as large as manual grinding slice breaking rate.

The invention discloses an inner-hole grinding machine with micro-ceramic bearing. A centering sleeve (3), which has an external surface with a taper and a shrinkable inner-hole diameter, is arranged in a rotary shaft(4) with an internal cone. A workpiece (2) can be mounted in the inner hole of the centering sleeve. A clamping device which clamps the centering sleeve (3) and the workpiece in the rotary shaft (4) is arranged on the two ends of the rotary shaft. An grinding steel wire rope (22) axially passes through the centering sleeve (3) and the inner hole of the workpiece (2), and the two ends of the grinding steel wire rope are fixed on a tension and clamping mechanism (29). The rotary shaft (4) is arranged on a rotary support which allows the rotary shaft to rotate around the axis line of the rotary shaft under high speed. The rotary support is arranged on a linear supporting seat which allows the rotary support to move back and forth along the axial line of the rotary shaft. The relative friction motion combined by reciprocating and rotating is produced between the wall of the inner hole of the workpiece and the convex site of the grinding steel wire rope, so the grinding of the inner hole of the ceramic bearing is achieved. Through controlling the parameters such as grinding time, tension force of grinding steel wire rope, the grinding machine can ensure that the grinding precision of the inner hole of the ceramics bearing is increased by one order of magnitude as compared with traditional grinding, and the efficiency is increased by 10 times.

The invention discloses an excircle abrasive belt grinding method of the wall thickness of a tube, which comprises a lathe bed and a linear guide rail, wherein the linear guide rail is installed on the lathe bed and provided with a grinding head mechanism; a feed mechanism and a blanking mechanism are respectively arranged on both ends of the lathe bed; an auxiliary supporting roller mechanism and a positioning clamping mechanism are arranged below the grinding head mechanism and installed on the lathe bed; and a wall thickness measuring mechanism is installed on the grinding head mechanism. According to the excircle abrasive belt grinding method, the excircle wall thickness of the tube can be detected and ground on the same lathe, the excircle abrasive belt grinding method has the advantages of simple structure, convenience in operation, high grinding precision and efficiency and good stability and reliability, and the uniformity of the wall thickness of the tube is guaranteed.

The invention discloses an automatic precision grinding device for the outer surfaces of shaft type workpieces and relates to the technical field of magnetic grinding. The device comprises a baseplate, a heel block, a driving wheel, a driven wheel, a transmission belt, a main shaft end cover, a first transmission box, a positioning seat, a flange plate, a three-jaws self-centering chuck, a grinding device, a connecting block, a grinding support base, a workpiece positioning base, a tailstock, a second motor, a coupling, a screw positioning seat, a screw, a supporting plate, a nut, a sensor positioning seat, a limit sensor, a slide way, the nut and a sliding block. A punched hole is formed in the top and / or the side of the grinding support base, a cylindrical cam is arranged on a connecting rod, the cylindrical cam is provided with a rotating rod, the grinding support base is provided with an arc block, a rotary knob is installed on the arc block, and the rotating rod is sleeved with the rotary knob. The automatic precision grinding device for the outer surface of shaft type workpieces has the beneficial effects that the device is simple in operation, low in cost, capable of adapting to shaft type workpieces of different specifications , capable of improving the machining efficiency and capable of improving the precision and quality of the outer surface of the shaft workpieces.

The invention discloses a grinding device for the inner wall and the outer wall of the pipe opening of a steel pipe. The grinding device comprises a base, steel pipe supports fixed to the base and used for supporting and rotating the steel pipe, a grinding assembly and a rotating assembly, wherein the grinding assembly and the rotating assembly are arranged on one side of the steel pipe supports. The grinding assembly comprises a machine frame, a drive device arranged in the machine frame, a transmission mechanism arranged in the machine frame, and two grinding wheels arranged on the outer side wall of the machine frame and driven by the drive device and the transmission mechanism to rotate. The rotating assembly extends into the machine frame. The whole machine frame is driven by the drive device to rotate. The two grinding wheels are fed to the steel pipe placed on the steel pipe supports to grind the pipe opening of the steel pipe. The two grinding wheels are arranged, and therefore the inner wall and the outer wall of the steel pipe can be ground at the same time, and the work efficiency is greatly improved; and in addition, the rotating assembly is arranged, and therefore the two grinding wheels can make contact with the inner wall and the outer wall of the steel pipe at the same time, and the grinding quality can be ensured.

A high-precision ball double-rotation V-shaped groove efficient grinding unit comprises a stand, a grinding pan device and a load pressurizing device which are arranged on the stand. The grinding pan device comprises an upper grinding pan, the upper end of the upper grinding pan is provided with the load pressurizing device; the high-precision ball double-rotation V-shaped groove efficient grinding unit also comprises a lower grinding inner pan and a lower grinding outer pan which are coaxially arranged, the lower grinding inner pan is embedded in the lower grinding outer pan, the tapered grinding surface at the outer side of the lower grinding inner pan and the tapered grinding surface at the inner side of the lower grinding outer pan form a V-shaped groove structure, the lower grinding inner pan is arranged on the stand, the upper grinding pan is arranged on a rotating shaft which is connected with an upper grinding pan drive motor, and the lower grinding outer pan is arranged on a main shaft which is connected with a lower grinding outer pan drive motor. The invention has simple structure, low processing cost and higher processing precision and processing efficiency.

The invention relates to a dynamic separation material discharging type grinding machine, comprising a grinding cylinder which is internally molded with a grinding cavity, and a feeding cavity communicated with the grinding cavity, wherein the two ends of the grinding cavity are respectively sealed by end covers; a main shaft penetrates through one end cover to stretch into the grinding cavity; one end of a grinding rotor in the grinding cavity is mounted on the main shaft; a material discharging shaft stretches into a material cavity from the other end cover; the material discharging shaft is provided with a separator; and a separation cavity of the separator is communicated with a material discharging cavity of the material discharging shaft. Four layers of rod pins are formed at the inner and outer sides of a grinding rotor, in the grinding cylinder and on the material discharging shaft, so that grinding materials are sufficiently grinded and the grinding precision is improved; and the separator of the grinding machine is driven by the motor to rotate to form dynamic separation so that the materials has small possibility of blocking the separator.

The invention discloses a superfine grinding oscillation mechanism which comprises an oscillation mechanism on a superfine grinding machine. Two balance wheels between left and right balance blocks are rotatably connected with a Geneva wheel together; the Geneva wheel is composed of two symmetric parts which are fixed on rotation shafts by bolts respectively; a drive wheel is mounted on the rotation shafts on the two sides of the Geneva wheel in a manner symmetrically protruding out of a shaft surface; and a transmission plate is coupled between the drive wheel and a ram. Through the invention, the oscillation frequency can be improved by more than one time, the oscillation conversion is smooth, the impact is obviously reduced, and the superfine grinding oscillation mechanism is favorable for improving the processing efficiency as well as surface accuracy and quality of products.

The invention discloses a method for polishing grinding wheels, which comprises the following steps: the parts to be removed on the grinding wheels to be polished are cut by laser to form preset curved surfaces on the grinding wheels. The grinding wheels are polished by the laser, so as to realize the accurate polishing for the grinding wheels through the accurate control on cutting tracks of a laser beam and accurately obtain the curved surfaces of the required grinded parts of the grinding wheels, thereby avoiding the errors caused by the manual polishing, improving the accuracy and the quality of the curved surfaces at the edges of the grinding wheels and improving the success rate of polishing; meanwhile, the parts of the grinding wheels, on which the focuses of the laser can arrive, can be cut, however, the laser beam can not be damaged, the laser cutting tracks can not be lost, so that the cutting output of the laser for the grinding wheels can not cause errors in the polishing process, namely, the cutting errors can be reduced to a lower level so as to improve the polishing accuracy of the grinding wheels, batch polishing can be realized for the grinding wheels in the same type, and extremely good consistency among a plurality of grinding wheels can be kept. In addition, for the mode of laser grinding for the grinding wheels, the speed is higher, the working efficiency of grinding the grinding wheels is improved, and the cost of manual polishing is saved.

Provided is a high-accuracy ball body machining method through an eccentric type curvature-variable groove. A machining device for achieving the method comprises an upper grinding disc, a lower grinding disc and a pressurizing system. The upper grinding disc is connected with an upper grinding disc main shaft. The lower grinding disc is connected with a lower grinding disc main shaft. The upper grinding disc main shaft and the lower grinding disc main shaft are connected with driving mechanisms respectively. The upper grinding disc is placed right above the lower grinding disc. A loading system is arranged on the upper grinding disc. The curvature-track-variable groove is formed in the lower grinding disc. The center of a curvature-variable track and the center of the grinding disc are eccentric. The pressurizing system has an effect on a ball blank through the upper grinding disc. A groove structure and the upper grinding disc form three machining contact points of a grinding ball. The ball blank to be machined moves between the upper grinding disc and the lower grinding disc in the groove during a machining process. According to the high-accuracy ball body machining method through the eccentric type curvature-variable groove, high machining accuracy, high machining efficiency and machining consistency can be achieved, the machining device is simple, and manufacturing cost is low.

The invention relates to a workpiece fixed-size compensation type double-sided grinding device and method. An upper fixed disk and a lower fixed disk are arranged in cooperation; the upper fixed disk is connected to a control mechanism; a sun gear is arranged in the middle of the lower fixed disk; a height meter is arranged in the axis of the sun gear; the top end of the height meter is right opposite to the center of the upper fixed disk; the height meter is connected to the control mechanism; and the control mechanism is connected with the upper fixed disk sequentially through a pneumatic mechanism and a cylinder; a planetary gear is meshed with the outer side of the sun gear and is provided with a through hole; and a lower fixed disk inner gear ring is meshed with the planetary gear. Through the combination with control over time and height, influences of the rotating speed, pressure and other external factors are eliminated during primary grinding, it is guaranteed that the measurement size is accurate, the workpiece measurement size value is relatively stable while the external factors are the same, the fixed-size grinding is performed at the moment, the size grinding technological requirement of a workpiece can be met at a time, the size of the ground workpiece is controlled through combination of grinding time control and height sensor control, control can be performed easily, the large-batch and automatic production requirement of the workpiece is met, and grinding precision is improved.

The invention discloses a double-sided grinding machine, and belongs to the field of grinding equipment. The double-sided grinding machine comprises an upper grinding disc mechanism and a lower grinding disc mechanism; the upper grinding disc mechanism comprises an upper grinding disc power assembly, an upper grinding disc assembly and a spherical hinge; and the upper grinding disc power assemblyand the upper grinding disc assembly are in transmission connection through the spherical hinge so that the power of the upper grinding disc power assembly can be transmitted to the upper grinding disc assembly through the spherical hinge. The double-sided grinding machine mainly solves the problems that a spherical hinge of an existing double-sided grinding machine cannot transmit the power, andthe power of an upper grinding disc needs to be transmitted through other mechanisms. According to the double-sided grinding machine, the spherical hinge can enable the upper grinding disc assembly tobe in a floating state, and can transmit the power for the upper grinding disc assembly, so that other transmission structures do not need to be arranged, the structure of the upper grinding disc mechanism is simple, the cost is saved, and meanwhile, the situation that an error is caused during grinding due to the fact that the complex transmission structure generates a cooperation error is avoided.

The present invention discloses a grinding wheel wear real-time compensation method based on a numerical control system. The grinding wheel wear extent is calculated and updated in real time according to the changing of the current of a spindle motor, the second development interface, at an interpolator layer, of the numerical control system is employed to correct G-code theory operation track points according to the real-time updated grinding wheel wear extent so as to realize the real-time compensation of the grinding wheel wear, the correction of the current device mechanical structure is not needed, the corresponding secondary development of the numerical control system is needed to realize the real-time grinding wheel wear compensation, and the device improvement cost is low; because the parameters of a cutter and cutter compensation cannot be frequently corrected so as to greatly improve the grinding processing efficiency and improve the grinding processing precision and the consistency of the polishing effect; the grinding wheel wear real-time compensation method based on the numerical control system combines a matching automatic programming module to be applied to the grinding wheel wear real-time compensation function requirement of different industries and different technology requirements with wide application markets and especially applied to the face profile curve edging field of complex shapes of materials such as stones, ceramics and glass, etc.

The invention discloses a novel rotary special-shaped polishing machine. The novel rotary special-shaped polishing machine comprises a rack. A conveying device for conveying boards is arranged on the rack. The rack is further provided with a rotary platform capable of rotating relative to the rack. The rotary platform is located above the conveying device. The rotary platform is provided with multiple polishing devices arranged around a rotary shaft of the rotary platform. The polishing devices comprise polishing rollers and polishing driving motors used for driving the polishing rollers to rotate automatically relative to the rotary platform. Multiple grinding wires formed by compounding resin and carborundum are arranged on the polishing rollers in the radial direction. Through revolution of the rotary platform and autorotation of the polishing rollers, special-shaped grooves in the boards can be effectively polished through the grinding wires on the polishing rollers; the grinding wires are formed by compounding resin and carborundum, so that the strength of the grinding wires is enhanced while the flexibility of the grinding wires is guaranteed, and grinding accuracy is greatly improved.

The invention discloses a precise grinding and polishing machine for the sealed end face of an airplane engine. The precise grinding and polishing machine comprises a shell, a gearbox, a first motor, a grinding liquid tank, a bearing plate, a liquid discharge pipe, a bearing box, a second motor, a third motor, a rotating wheel, a grinding plate installation plate and a grinding plate, and is characterized in that a supporting beam is arranged on the shell and provided with a guide rail, a sensor, a cylinder and a controller, the bearing box is connected with the cylinder through a lifting rod, a slide block, a spray nozzle and a stabilizer are arranged on the outer wall of the bearing box, a cushion block and a movable block are arranged in the bearing box, the second motor is arranged on the cushion block, and the third motor is arranged on the movable block. The grinding plate grinds a workpiece according to the track shaped like the Arabic number '8' under the effect of the second motor and the third motor, the grinding plate is prevented from making complete contact with the workpiece, the ground workpiece can be rapidly cooled, and meanwhile the grinding precision of the workpiece can be improved.

The invention provides a sharpening machine for sawteeth of a saw band, belonging to the machine tool manufacturing technical field. The sharpening machine solves the problems of the existing sharpening machine tool for the sawteeth of the saw band such as inaccurate tool setting, small machining range and the like. The sharpening machine comprises a workbench, a limit mechanism, a grinding wheel drive motor assembly, a teeth shifting component and a power mechanism, wherein, the limit mechanism is arranged on the workbench for limiting the position of the saw band during a sharpening process; the end part of the teeth shifting component is embedded at the sawteeth of the saw band; the workbench is equipped with a spring steel plate; the grinding wheel drive motor assembly is arranged on the spring steel plate; a first transmission mechanism for driving the teeth shifting component to perform teeth shifting action is arranged between the power mechanism and the teeth shifting component, and a second transmission mechanism for driving the grinding wheel drive motor assembly to move in a straight line on the spring steel plate is arranged between the power mechanism and the grinding wheel drive motor assembly; and when the power mechanism works, the first transmission mechanism and the second transmission mechanism can drive the teeth shifting component and the grinding wheel drive motor assembly to make alternating movement. The sharpening machine has the advantages of high tool setting accuracy, good applicability, good stability and the like.

A grinding device (30) for grinding an object (31) at high accuracy has a support table (32) on which the object (31) is supported and fixed, a vertically movable rotating shaft (34) arranged above the support table, a drive device (35) for vertically moving the rotating shaft, a drive device (36) for rotating the rotating shaft, an elastic body (37) fixed to a base section of the rotating shaft, an annular grind stone (38) provided to a bottom of the elastic body, ultrasonic vibrators (39) arranged on the elastic body, and a transmission unit (41) for transmitting electric energy to the ultrasonic vibrators, in which the elastic body is an annular elastic body and a connection plate (42) is provided between the annular elastic body and the base section of the rotating shaft under such condition that the connection plate and the annular elastic body are connected by connection means (45) having alternately arranged connection sections and space sections and each ultrasonic vibrator is arranged at a predetermined position of the elastic body.