5244 results about "Polishing" patented technology

The invention discloses a polishing device for hub processing of a new energy automobile, and relates to the technical field of automobile part processing. The polishing device comprises a worktable,a hub top polishing mechanism, a hub side polishing mechanism and a hub limiting rotation mechanism, wherein the hub top polishing mechanism is arranged above the worktable, the hub side polishing mechanism is arranged at the top of the worktable, and the hub limiting rotation mechanism is arranged below the worktable; the hub limiting rotation mechanism comprises a height adjustment assembly, a hub inner circle fixing assembly for clamping a hub inner circle and a rotating assembly for driving the hub to rotate, and a through hole is formed in the top of the worktable so that the hub inner circle fixing assembly can lift and pass through the through hole. According to the invention, the polishing device can clamp the hub inner circle and drive the hub to rotate under the action of the hublimiting rotation mechanism, the angle adjustment of a grinding wheel can be realized through the hub side polishing mechanism, and then polishing chamfering operation on the top surface of the hub is realized.

The invention relates to grinding and polishing equipment, in particular to round wood grinding and polishing equipment. The technical problem of the invention is about provision of the round wood grinding and polishing equipment which can make working personnel easier and save time. The round wood grinding and polishing equipment comprises an operating table, a speed reducing motor, a clamping component, guide rails and the like; the upper side of the operating table is in bolt connection with the speed reducing motor and at least two guide rails; and the clamping component is mounted on thespeed reducing motor and is used for clamping a round wood. According to the round wood grinding and polishing equipment, the round wood can be driven to rotate clockwise through the speed reducing motor; the round wood can be ground by the grinding component, so that the round wood can be rotated automatically and can be ground automatically; therefore, people can be easier and time can be saved;and the leftward moving speed of a grinding wheel can be more uniform through a moving component, so that the grinding and polishing quality of the round wood is not affected.

The present invention is a wafer polishing method including simultaneously polishing both surfaces of a wafer by pressing and rubbing the wafer, while holding the wafer with: a lower turn table having a flat polishing-upper-surface rotationally driven; an upper turn table having a flat polishing-lower-surface rotationally driven, the upper turn table being arranged with facing to the lower turn table; and a carrier having a wafer-holding hole for holding the wafer, wherein the polishing is performed while measuring a thickness of the wafer through a plurality of openings provided between a rotation center and an edge of the upper turn table or the lower turn table, and switching a polishing slurry with a polishing slurry having a different polishing rate during the polishing of the wafer. As a result, there is provided a wafer polishing method that can manufacture a wafer having a high flatness and a high smoothness at high productivity and high yield.

An ultrasonic control shear thickening and polishing method comprises the following steps of 1 adding a non-Newtonian fluid polishing solution mixed with abrasive particles and having the shear thickening effect into a polishing pond and fixing a workpiece on a clamp, wherein the clamp is located above the polishing pond; 2 starting a polishing solution circulating system to enable the non-Newtonian fluid polishing solution to be circularly pumped out of the bottom of the polishing solution and fed into the upper portion of the polishing pond; 3 starting an ultrasonic wave generating device, and meanwhile setting the vibration frequency and vibration amplitude to enable the non-Newtonian fluid polishing solution in the polishing pond to rapidly vibrate and produce a strong shear thickening phenomenon; 4 adjusting the clamp to enable the workpiece to perform relative motion, wherein the abrasive particles having the polishing effect produce the micro-cutting effect or chemical mechanical effect on the workpiece to remove materials on the workpiece surface, and accordingly the workpiece surface polishing is achieved. The invention further provides an ultrasonic control shear thickening and polishing device. The ultrasonic control shear thickening and polishing method and device is high in polishing efficiency and low in cost.

The invention discloses a dust reduction type steel plate double-face efficient polishing device which comprises an operation chamber. A driven shaft is vertically and rotationally arranged in the operation chamber, and a polishing plate is coaxially and fixedly installed at the bottom end of a driving shaft; a guide rod connected with the left side wall of the operation chamber in a sliding manner is horizontally arranged at the left end of a dual-rectangle-shaped frame, and a sliding rod movably connected with a vertical plate is horizontally arranged at the right end of a support; and a limiting spring is arranged on the sliding rod on the vertical plate at the right end of the upper surface of a bearing table in a sleeving manner, a positioning disc is fixedly installed on the right side of the vertical plate at the right end, a center hole is formed in the center of the positioning disc, and an upper positioning hole and a lower positioning hole which are subject to up-and-down vertical symmetry with respect to the center of the center hole are formed in the positioning disc. The dust reduction type steel plate double-face efficient polishing device is ingenious in structure and reasonable in design; the polishing plate is driven by a driving motor to achieve rotary polishing on a steel plate, the polishing scope is wider, and the steel plate polishing efficiency is improved; and the sliding rod is rotated to drive an L-shaped positioning shaft to rotate, and therefore double-face polishing on the steel plate can be achieved, and the overturning operation is easy and convneient.

The invention discloses a surface contact magneto-rheological flat polishing device and method with a uniform magnetic field. The surface contact magneto-rheological flat polishing device with the uniform magnetic field comprises a polishing head, a polishing groove fixed onto a main shaft and a magnetic pole arranged under the polishing groove. The magnetic pole maintains a certain gap from the outer surface of the bottom of the polishing groove; the polishing head comprises a workpiece shaft and a non-magnetic-conducted clamp fixed to the lower end of the workpiece shaft, and a soft magnetic plate is arranged between the non-magnetic-conducted clamp and the workpiece shaft; the polishing head is arranged above the polishing groove; the uniform magnetic field is formed between the magnetic pole and the soft magnetic plate; and the polishing groove is filled with magneto-rheological fluid. The surface contact magneto-rheological flat polishing device and method with the uniform magnetic field can achieve the large-area uniform polishing of a super-smooth large-size flat element and improve the polishing efficiency effectively; reduces the complexity of the motion mode of a workpiece to simplify the device structure; enables the magnetic field to be not easy to attenuate and obtains the uniform magnetic field with a magnetic pole gap of 30 mm; and can achieve demagnetization easily.

The invention discloses an optical mirror ion beam nano-precision machining method based on combination of material addition and removal, and the method comprises the following steps: firstly obtaining an addition function, then measuring the surface shape error of a workpiece to be machined, and determining addition residence time according to a two-dimensional convolution formula by taking a numerical value obtained by inversing a measuring result as the additive amount of materials; according to the addition residence time, using an ion beam polishing system to perform deterministic addition control on the workpiece to be machined so as to form a protective sacrificial layer; measuring the surface shape error of the workpiece to be machined again, and then determining removal residence time according to the two-dimensional convolution formula by taking the measuring result as the removal amount of the materials; and using the ion beam polishing system to perform deterministic removal control on the workpiece until removing the protective sacrificial layer so as to complete optical mirror nano-precision machining for the workpiece to be machined. The optical mirror ion beam nano-precision machining method has the advantages of simple processing steps, less investment in equipment and high machining efficiency, and can be used for effectively improving the surface roughness of an optical element, correcting the medium-high frequency error, and the like.

The invention relates to a stainless steel plate 8K mirror surface processing method, which is characterized in that the method comprises the following steps of: 1) water washing: cleaning sundries on the surface of a stainless steel plate; 2) rough polishing: polishing the surface of the stainless steel plate by using a rough polishing abrasive tool, i.e. a graphite wheel till the surface is evenly treated and is free of pocking marks, wherein the polishing gap is half of diameter of the polishing wheel; 3) precise polishing: precise polishing the surface of the stainless steel plate by using a precise polishing abrasive tool, i.e. a wool felt, in combination with polishing solution till the surface is free of wheel knurls and fine scratches and is uniform; 4) water washing and drying: washing the stainless steel plate with water and blow-drying the stainless steel plate by using a dryer; and 5) film sticking: sticking a film by using a stainless steel plate film sticking machine. By using the stainless steel plate 8K mirror surface processing method, the surface of a stainless steel plate production can be polished to an 8K mirror surface from a 2B or rougher surface, the mirror surface is bright, gorgeous, attractive and generous, and the processed product satisfies the requirements in SN/T1671-2005 Rules for Inspection of Surface Quality of Stainless Steel Decoration Sheets for Export.

The invention relates to the technical field of aluminum substrate production and machining, in particular to integrated equipment for cutting, drilling and polishing an aluminum substrate. The integrated equipment comprises a feeding assembly, a cutting assembly, a polishing assembly and a drilling assembly, wherein the polishing assembly comprises a turntable, a rectangular table, two end polishing mechanisms and two edge polishing mechanisms; the feeding assembly comprises a first fixed clamp and a first movable clamp; the arrangement directions among the turntable and the two end polishingmechanisms and among the rectangular table and the two edge polishing mechanisms are perpendicular to the arrangement direction among the first fixed clamp and the first movable clamp; the cutting assembly comprises a circular saw blade and a moving mechanism; the circular saw blade is fixedly connected with the moving mechanism through a telescopic cylinder; the drilling assembly comprises a discharging mechanism and a drilling mechanism; and the first fixed clamp, the first movable clamp, the turntable and the rectangular table are sequentially arranged in a straight line. According to theintegrated equipment, the problem that cutting, grinding and drilling cannot be completed at a time when the aluminum substrate is machined, the time is saved, and the manpower and the cost are reduced.

The invention discloses an industrial robot high-precision constant-force polishing method based on curved surface self-adaption. The method comprises the steps of acquiring scanning sampling point data information of the surface of a workpiece to be polished by adopting a linear structured light scanning mode, and acquiring an ordered point cloud model of the workpiece to be polished; through point cloud preprocessing, establishing an STL model of the surface of the to-be-polished workpiece; extracting and utilizing geometric features and topological features of the STL model on the surface of the to-be-polished workpiece, and dividing the curved surface of the to-be-polished workpiece into a plurality of planes without holes; constructing a feature frame according to the STL model of thesurface of the to-be-polished workpiece, and generating a robot polishing motion track by adopting a cutting plane projection method; and in the robot grinding process, constant-force grinding control is achieved according to real-time force feedback. The method has the beneficial effects that the constant-force grinding task for any curved surface can be achieved; the adaptability of the grinding method to the curved surface is improved; the grinding precision is improved; and therefore the intelligence and the automation level of a robot grinding system can be improved.

The invention relates to an ultra-smooth plane grinding polishing device and method for online trimming a flexible polishing pad. The ultra-smooth plane grinding polishing device comprises a cluster magneto-rheological abrasive semi-fixed flexible polishing pad generating device, a workpiece clamping and intermittent adjusting mechanism and a flexible polishing pad real-time trimming device, wherein the cluster magneto-rheological abrasive semi-fixed flexible polishing pad generating device comprises an annular grinding disc, a cluster magnetic pole, a separation disc, a lower end cover and a rotating plate, the workpiece clamping and intermittent adjusting mechanism comprises an inner supporting ring, an outer supporting ring, a planetary gear, a movable cylinder, an upper end cover, a depth scale, a connection shaft, an expansion sleeve, an inner gear and an outer gear, and the flexible polishing pad real-time online trimming device comprises a trimming planetary gear and a magnetic pole. By adopting the ultra-smooth plane grinding polishing device, the whole process of grinding, coarse polishing and fine polishing of the workpiece under the situation that the magneto-rheological liquid is not replaced can be realized, the surface quality of the workpiece is good, and the machining efficiency is high; moreover, the surface and subsurface damage can be avoided, the cost is low, and the ultra-smooth plane grinding polishing device can be used for machining different optical elements and semiconductor substrates.

The invention relates to the technical field of pipeline surface rust removal and particularly relates to pipeline outer wall descaling equipment integrating cutting and polishing. The equipment comprises a workbench, a lifting fixing mechanism, a movable fixing mechanism, a lifting cutting mechanism, a movable grinding mechanism, an abutting rotating mechanism and a movable turning mechanism, wherein the lifting fixing mechanism is arranged at one end of the workbench, the movable fixing mechanism comprises a first movable fixing assembly and a second movable fixing assembly, the first movable fixing assembly and the second movable fixing assembly are both arranged on the workbench, the lifting cutting mechanism is arranged above adjacent ends of the first movable fixing assembly and thesecond movable fixing assembly, and the abutting rotating mechanism comprises a movable abutting assembly and an abutting rotating assembly. The equipment can automatically cut, polish and derust a rusted pipeline, and is convenient and reliable to operate and small in labor amount.

The invention belongs to the technical field of cutting equipment, and particularly discloses a tubular product cutting device with a polishing function. The tubular product cutting device comprises aworking table, and the working table is provided with a cutting unit, two clamping units and polishing units. The clamping units comprise sliding tables, and two ends of the sliding tables are slidably connected with the two sides of the working table in the conveying direction of a tubular product. Fixed clamps and movable clamps are arranged at the top ends of the sliding tables, wherein the fixed clamps and the movable clamps are mutually symmetric, the fixed clamps are fixedly connected with the sliding tables, and the movable clamps are slidably connected with the sliding tables. First power pieces for driving the movable clamps to slide are arranged on the sliding tables, the polishing units comprise polishing discs and second power pieces for driving the polishing discs to performreciprocating motion in the vertical direction, and a storage cavity for storing the polishing discs is formed in the working table. According to the tubular product cutting device with the polishingfunction, the tubular product is cut, meanwhile, the end part of the tubular product is polished, so that machining is carried out without being divided into two steps, and the machining efficiency isimproved.

The invention provides a mechanical hand for carrying out chamfering polishing on the end face of a gear. A probe at the tail end of the mechanical hand and a polishing head are arranged to be an integrated linkage whole, a master controller enables the probe to make contact with the gear at the set contact pressure value, and the probe is arranged to be a sensor which monitors the contact pressure value in real time. The master controller adjusts the contact pressure value at the next moment. The displacement path of the probe is the polishing path of the polishing head. The invention furtherprovides a polishing method of the mechanical hand for carrying out chamfering polishing on the end face of the gear. The method comprises the steps that 1, the probe makes contact with the edge of the gear at the set contact pressure value; 2, when the gear is rotated, a force sensor feeds the real-time contact pressure value of the probe and the gear back to the master controller; 3, the position of the probe at the next moment is adjusted to enable the probe to be in tight fit with the gear, and copying description is carried out the gear contour; and 4, the polishing head and the probe are in integrated linkage, and the copied contour described by the probe is converted to be the polishing path of the polishing head. The contact force of the probe and the surface of the gear is controllable, the machining precision is high, and polishing quality is good.

The invention discloses an ultra-precision flexible chemical mechanical polishing device and method for a micro bearing core element. The core element comprises an inner ferrule, a retainer, a rollingbody and an outer ferrule. The polishing device comprises an element rotation module, an outer ferrule steering module, an element clamping module, a polishing liquid pool rotation module and a support. The element clamping module provides an inner ferrule clamp, a retainer clamp, a rolling body clamp and an outer ferrule clamp in a targeted manner. The polishing method comprises the steps of installing and debugging the polishing device, preparing flexible chemical mechanical polishing liquid, setting polishing process parameters, measuring the surface quality and conducting feedback. The flexible chemical mechanical polishing liquid comprises non-Newtonian fluid, 0.01-40 wt% of grinding particles, 0-10 wt% of an oxidizing agent, 0-10 wt% of a metal complexing agent, 0-5 wt% of a metal corrosion inhibitor and the balance water, and the pH value is 2.0 to 10.0. According to the ultra-precision flexible chemical mechanical polishing device and method, by optimizing the synergistic effect of the chemical reaction and the mechanical force of the force rheological effect, ultra-precision low-damage machining and complex curved surface shape-preserving machining of the surface of the core element can be achieved, and the device and method are green and environment-friendly.

The invention discloses a chemical mechanical polishing (CMP) device. The chemical mechanical polishing device comprises a polishing table, a polishing cushion, a polishing heat, a clamping ring, a first radiating device and a second radiating device, wherein the polishing cushion is fixed on the polishing table; the end face of the polishing head is matched with the polishing cushion for grinding a wafer; the clamping ring is arranged on the edge of the end face of the polishing head for clamping the wafer; the first radiating device is arranged around the outer side of the polishing head; and the second radiating device is arranged between the polishing cushion and the polishing table. The invention further provides a chemical polishing system. Due to the adoption of the technical scheme provided by the invention, the requirement of keeping the polishing temperature constant in a chemical mechanical polishing process which cannot be realized by using the conventional CMP device is met, the phenomenon of non-uniform removing thickness of a CMP wafer is avoided, and the rejection rate of the wafer is reduced.

The invention discloses a bearing ring machining and polishing device, and relates to the technical field of bearing ring machining. The bearing ring machining and polishing device comprises a base, aclamping and overturning mechanism, a polishing mechanism and a chipping treatment mechanism, wherein the clamping and overturning mechanism is fixedly arranged on one side of the base, the clampingand overturning mechanism comprises an overturning assembly and a clamping assembly, the overturning assembly is fixedly arranged on the base, the clamping assembly is fixedly arranged on the overturning assembly, the polishing mechanism is fixedly arranged on the base, the polishing mechanism comprises a horizontal moving assembly, a polishing frame, a lifting assembly, a position adjusting assembly, an angle adjusting assembly and a polishing machine, and the chipping treatment mechanism is fixedly arranged on the base. According to the bearing ring machining and polishing device, automaticbearing ring double-face polishing operation and chipping cleaning operation in the polishing process are completed through cooperative work of all the assemblies, manual overturning and chipping cleaning are not needed, manpower is saved, and practicability is high.

The invention relates to cutting and polishing equipment, and in particular relates to the cutting and polishing equipment for a plastic-wood plate. The invention provides the cutting and polishing equipment capable of preventing the plastic-wood plate from shaking and making the cutting surface of the plastic-wood plate more smooth for the plastic-wood plate. The cutting and polishing equipment for the plastic-wood plate includes a base plate, first supports, a placing plate, first sliding rods and the like; and the first supports are fixedly connected to two sides of the top of the base plate, the placing plate and the first sliding rods are fixedly connected between the first supports on two sides, and the placing plate is placed below the first sliding rods. According to the equipment,the plastic-wood plate can be fixed by a clamping component to prevent the plastic-wood plate from shaking, the plastic-wood plate can be polished by the polishing component, so that the cutting surface of the plastic-wood plate is smoother, a clutch component can replace manual operation, so that the equipment can be more automated; and a sliding plate can be pulled back by a small motor, so that the sliding plate can be pulled back quickly, and the time can be saved.

A polishing apparatus has a plurality of polishing units. Moving mechanisms for moving top rings between polishing positions on polishing surfaces and wafer receiving/delivering positions are provided in each of the polishing units. Linear transporters are provided for transferring a wafer between a plurality of transferring positions including the wafer receiving/delivering positions. Pushers for receiving and delivering the wafer between the linear transporters and the top rings are provided at the transferring positions as the wafer receiving/delivering positions.

The invention discloses an efficient grinding equipment for pipeline finish machining and polishing. The efficient grinding equipment comprises a base, a shell is fixed to the top of the base, a clamping mechanism, a grinding mechanism and a dust removal mechanism are arranged inside the shell, a driving mechanism used for driving the clamping mechanism to rotate is fixed to the top of the base, and a transmission mechanism is arranged on the outer wall of the shell above the driving mechanism. According to the efficient grinding equipment for pipeline finish machining and polishing, by arranging the driving mechanism, the clamping mechanism, the grinding mechanism and the dust removal mechanism, the phenomenon of missing grinding of the surface of a circular pipe is avoided while the circular pipe is uniformly ground, the grinding effect and the grinding speed of the circular pipe are improved, and meanwhile, the effect of efficiently removing dust in the shell is achieved.

The invention discloses a lifting type building steel pipe inner wall derusting and polishing device, and relates to the technical field of building machineries. The lifting type building steel pipe inner wall derusting and polishing device comprises a fixing frame, wherein a polishing mechanism used for derusting the inner wall of a steel pipe is arranged on a second spur rack, and a lifting mechanism used for driving a supporting plate to vertically ascend and descend is in driving connection with a motor; and a rotating mechanism for driving a supporting seat to rotate is arranged at the bottom of the supporting plate. According to the lifting type building steel pipe inner wall derusting and polishing device, the steel pipe is limited through the arranged clamping mechanism, the arranged lifting mechanism can drive the clamping mechanism to drive the steel pipe to vertically reciprocate relative to the grinding mechanism, and under the driving effect of the rotating mechanism, thesteel pipe vertically reciprocates and simultaneously rotates clockwise and anticlockwise alternately; and the full rotary polishing effect of a polishing plate in the polishing mechanism on the innerwall of the steel pipe is achieved; a sleeve wheel in the polishing mechanism rotates, the distance adjusting effect of the polishing plate relative to a stand column can be achieved, flexible adjustment is achieved according to the steel pipes with different inner diameters, and efficient and comprehensive rust removal of the steel pipes is guaranteed.

The invention discloses a grinding and polishing device for processing and production of a mechanical accessory. The grinding and polishing device comprises a base. Shock absorbing pads are symmetrically and fixedly connected to the bottom side of the base, anti-skid patterns are arranged on the bottom side surfaces of the shock absorbing pads, four supporting rods are symmetrically and fixedly connected to the base, the four supporting rods are distributed in a rectangular array, the ends, far away from the base, of the supporting rods are fixedly connected to a top plate, two rotating sleeves are symmetrically and rotatably connected to the bottom side of the top plate, electromagnets are fixedly connected in the two rotating sleeves, sliding mechanisms are arranged in the rotating sleeves, and the electromagnets are connected to rotating rods through the sliding mechanisms. After grinding and polishing work, an output shaft is driven by a first driving motor to rotate, so that a turnplate rotates, and a polished workpiece moves to a polishing station quickly, the polished workpiece is replaced and a new to-be-ground workpiece is assembled to be ground, so that the work efficiency is improved.

The invention relates to a Martensite high-alloy heat resistant steel metallography detection polishing agent, and the polishing agent comprises the following components in parts by weight: 1.8-2.2 parts of oxalic acid, 0.8-1.2 parts of hydrofluoric acid, 10-30 parts of water and 30-50 parts of hydrogen peroxide. The invention also relates to the application of the polishing agent in metallography detection, which comprises the following steps: (1) abrading; (2) polishing; (3) corrosion: a test surface of Martensite high-alloy heat resistant steel is corroded by chemical etchant, thus displaying a microscopic metallographic structure; (4) replication: a medical film is applied to the test surface of the Martensite high-alloy heat resistant steel, and micro morphology of the metallographic structure is extracted; and (5) observation: taking pictures and evaluation. The Martensite high-alloy heat resistant steel metallography detection polishing agent and the application have scientific compatibility, simple fabrication process, good polishing effect and high innovation and can effectively prevent pseudophase from generating in polishing.

The invention relates to diamond saw blade performance testing, in particular to a saw blade cutting performance test machine and a test method thereof. The test machine comprises a stand column (1), a cross beam (2), a feed frame (3), a feed drive device (4), a cutting power head (5), a drilling polishing power head (6), a power head lifting mechanism (7), a feed carriage (8), a feed rack (9) and a feed drive mechanism (10). The test machine can be used for standardized quantitative verification testing of cutting performance of cutting, drilling and polishing tool products, fills up blank in the industry, has the characteristic of being capable of performing different cutting tests for different plates, not only avoids tooth burning of a test product due to overload but also can prevent the situation that the due efficiency of the test product cannot be reflected due to excessively small load to enable the test product to completely meet the specific requirements of merchants, is also suitable for serving as a process technology research and development test machine, and provides a powerful test verification way for extension of the cutting, drilling and polishing tools to the high-tech field.

The invention provides a disc polishing machine in the technical field of polishing equipment. The disc polishing machine comprises a rotatable disc, wherein at least one clamp for clamping a workpiece is arranged on the disc; at least one polishing device for polishing the workpiece is arranged around the disc at intervals; and the polishing device is used for polishing the workpiece on the clamp, can move in the transverse direction and the longitudinal direction, and can rotate. The disc polishing machine can automatically adjust the position of the polishing device, is uniform in polishing, improves the polishing effect, and works reliably.

The invention discloses a device and a method for polishing a symmetrical optical component of a small-caliber rotating shaft. The device comprises a sealed container mechanism, a workbench drive system which is installed in an inner cavity of the sealed container mechanism and a polishing fluid circulating system which is connected with the sealed container mechanism; and a negative pressure space is formed in the upper part of the inner cavity of the sealed container mechanism. During the polishing, a suction effect of negative pressure difference is utilized for sucking and compositing polishing fluid, a negative pressure cavitation effect is utilized for machining a workpiece surface, a normal pressure environment of machining is changed into a negative pressure environment, air disturbance in an injection process is reduced, a polishing point can be reduced, and the sliding friction function and stability of micro and fine abrasive particles are increased; and moreover, the negative pressure cavitation effect forms strong cavitation shock wave and high speed micro jet, so that the removal efficiency of the workpiece surface is increased. Materials are removed under the combined action of abrasive particle cutting and cavitation erosion, so that the surface with high quality is obtained. The device is suitable for polishing various rotating symmetroid optical components, and has a high practicable value in automatic processing.

The invention discloses a polishing and deburring device for a side wall of a metal short pipe and relates to the technical field of machining. The device comprises a supporting frame, wherein a rotating shaft is rotationally installed on the supporting frame, the supporting frame is coaxially fixed to an upper end of the rotating shaft, a clamping mechanism used for clamping and fixing a metal short pipe is arranged on the supporting frame, a dust collection box is fixed to the top of the supporting frame, and a dust suction mechanism communicated with the dust collection box is arranged in the metal short pipe. The device is advantaged in that the arranged clamping mechanism is used for stably clamping and fixing the metal short pipe, the arranged lifting mechanism can drive a rotating polishing strip plate to do vertical reciprocating motion, the full deburring effect on different vertical height position areas of an inner wall of the metal short pipe is achieved, the arranged rotating shaft can drive the supporting frame to rotate, the supporting frame drives the metal short pipe on the supporting frame to rotate, deburring efficiency of the inner wall of the metal short pipe is greatly improved, dust generated in the polishing and deburring process can achieve the efficient dedusting effect through a dust suction mechanism, and the deburring process is more environmentallyfriendly.

The invention provides a method for spraying the surface of an engineering machinery covering part. Before a complete machine is assembled, spraying of parts covering the surface of a machine body is finished, and assembling of the complete machine is then performed. The method for spraying the surface of the engineering machinery covering part includes the specific steps of surface preprocessing, primer spraying, primer drying, puttying, finish paint spraying, finish paint drying and polishing. The method is characterized in that a corrosion-resisting coating is sprayed after surface preprocessing and before primer spraying. According to the method for spraying the surface of the engineering machinery covering part, the spraying efficiency of the covering part can be improved, the spraying quality is guaranteed, the dosage of primer is reduced, and the number of times of spraying finish paint is reduced.

A multi-abrasive tool is constituted by a support on which abrasive elements are present. Such abrasive elements are arranged in a manner so as to form one or more paths along which the successive abrasive elements have grain size sequentially increasing or decreasing by an arbitrary quantity when passing from on element to the next. Such principle gives rise to abrasive tools with different conformation both for polishing machines and for grindstones. For roto-orbital and planetary polishing machines, and optionally orbital, such support is circular and the grain sequence is circumferential, or radial, or in both directions. A first tool is constituted by contiguous (or non-contiguous) circular rings, that are differently abrasive. A second tool comprises differently abrasive elements arranged along the circular peripheral edge. A third tool comprises differently abrasive elements arranged along a spiral path of 360° starting from the edge. A fourth tool comprises two 180° spiral paths with reversed roughness sequences. A fourth tool comprises pairs of differently abrasive small cylinders fixed to a plate on concentric circumferences. A fifth tool is obtained directly on the plate of the polishing machine by means of reliefs and spacers for fixing differently abrasive sectors. For linear polishing machines, the abrasive support is a belt along which differently abrasive rectangular or oblique zones follow each other. For alternative polishing machines, the abrasive support is a plate shaped like the aforesaid belt. For tools to use with grindstones, the multi-abrasive element has a cylindrical rotation symmetry, or conical with rounded tip, or spherical symmetry.

The invention discloses part clamping and polishing machine equipment and a working method thereof, which is used for solving the problems of inconvenient clamping and large operating difficulty whenan existing clamping device clamps the inner and outer ends of a tubular part in the perpendicular direction. The part clamping and polishing machine equipment comprises a machine frame and a fixed frame, sliding chutes are symmetrically formed in the two side walls of the interior of the machine frame, the two ends of the bottom of the fixed frame are inserted into the two sliding chutes in a sliding manner, and the fixed frame is fixedly connected with the sliding chutes through bolts. The tubular part is extruded in the up, down, left and right directions through four arc clamping pieces, clamping is convenient, movable plates are pulled downward, so the movable plates slide on supporting rods to be fit with the upper end face of the machine frame, the movable plates move downwards, andthus a plurality of transparent polyethylene (PE) plates on louver boards are driven to be unfolded; by unfolding the transparent PE plates on the louver boards, crushed materials are conveniently sheltered during polishing and fall into a collecting tank; and the tubular part is polished through clamping and rotation of a circular clamping holder.