1434 results about "Surface grinding" patented technology

A hot-dip galvanized steel sheet having both high strength and good formability. A process for producing said hot-dip galvanized steel sheet without requiring additional steps of surface grinding and pre-plating.The hot-dip galvanized steel sheet is produced by forming a hot-dip galvanizing layer on a base cold-rolled steel sheet composed of C (0.02-0.20 mass %), Mn (1.50-2.40 mass %), Cr (0.03-1.50 mass %), Mo (0.03-1.50 mass %), 3Mn+6Cr+Mo (no more than 8.1 mass %), Mn+6Cr+10 Mo (no less than 3.5 mass %), Al (0.010-0.150 mass %), and Fe as the principal component, with Ti limited to 0.01 mass % or less, Si limited to 0.04 mass % or less, P limited to 0.060 mass % or less, and S limited to 0.030 mass % or less, and said base steel sheet having the composite microstructure composed mainly of ferrite and martensite.

A wafer processing method for dividing a wafer having function elements in area sectioned by dividing lines formed on the front surface in a lattice pattern into individual chips along the dividing lines, comprising a deteriorated layer forming step for forming a deteriorated layer on the side of the back surface of a position at a distance corresponding to the final thickness of the chip from the front surface of the wafer by applying a laser beam capable of passing through the wafer along the dividing lines from the back surface of the wafer; a dividing step for dividing the wafer into individual chips along the dividing lines by applying external force to the wafer in which the deteriorated layer has been formed along the dividing lines; and a back surface grinding step for grinding the back surface of the wafer divided into individual chips to the final thickness of the chip.

The invention discloses a double-surface grinding and double-surface polishing high-efficiency ultraprecise processing method for a large-sized A-directional sapphire mobile phone screen. The method comprises the steps of crystal ingot orientation, crystal plate slicing, crystal plate double-surface grinding, crystal plate cleaning, crystal plate annealing, crystal plate double-surface polishing, secondary crystal plate cleaning, laser drilling, crystal plate chamfering, triple crystal plate cleaning and crystal plate film plating. According to the method, optimal parameters, including constituents of polishing liquid, of the optimal processing technology and all the steps can be obtained by screening by a large quantity of experiments. By the method, the manufacturing technology of the large-sized (10 inches) sapphire mobile phone screen can be simplified, the processing stress on the surface layer can be effectively eliminated, the mechanical processing damaged layers can be eliminated, and the ultrasmooth surface with a complete surface crystal lattice, the flatness being less than 5 microns and the polishing surface roughness (RMS) being less than 0.2 nanometers can be obtained; the processing quality is high, the cost is low, and the efficiency is high; compared with the prior art, the method disclosed by the invention has the advantage that an extremely high technical progress is achieved.

The invention provides an intelligent surface grinding machine with a horizontal spindle and a rotary table, which comprises a grinding machine body and a worktable, wherein one side of the worktable is provided with a turn-over device, an automatic thickness measuring device, a workpiece and worktable cleaning device and a workpiece storage site; and a mechanical arm is arranged above the worktable, the turn-over device and the workpiece storage site. By adopting the intelligent surface grinding machine with the horizontal spindle and the rotary table, both surfaces of a saw bit matrix are automatically processed without manual interference through the arranged turn-over device, automatic thickness measuring device and mechanical arm, and the production efficiency is greatly improved. Moreover, as all steps are controlled by a program, the human error is also reduced, and the workpiece quality is improved.

Provided are a bonding substrate whose defective bonding portion in a peripheral region of an active layer has been removed by a polishing applied thereto after a surface grinding, a manufacturing method of the same substrate and wafer periphery pressing jigs. After the surface grinding, a periphery removing polishing is applied from an active layer wafer side of a bonding wafer so that a peripheral region of the active layer may be removed and a central region thereof may be left un-removed. Consequently, a periphery grinding and a periphery etching according to the prior art can be eliminated. Furthermore, an etch pit on a circumferential face of a wafer which could be caused by the periphery etching and a contamination or a scratching in an SOI layer which could be caused by a silicon oxide film left un-ground-off can be prevented, thereby achieving high yield and low cost.

The invention relates to the field of cutting and grinding machines, in particular to square tube cutting and end surface grinding integrated equipment. The equipment comprises a feeding component, acutting component and an end grinding component, wherein the end grinding component comprises a rotary table and two grinding mechanisms symmetrically arranged on the two sides of the rotary table, the feeding component comprises a first fixed clamp and a movable clamp, the cutting component comprises a movable base and a circular saw blade, an angle adjusting mechanism connected with a free end of a supporting arm is arranged at the top of the movable base, a horizontal pushing air cylinder is arranged at the top of the starting end of the feeding component in a horizontal state, the horizontal pushing air cylinder, the first fixed clamp, the movable clamp and the rotary table are linearly arranged in sequence, and a second fixed clamp is arranged on the top of the rotary table. Accordingto the square tube cutting and end surface grinding integrated equipment, the cutting component carries out cutting on a square tube, and the end grinding component carries out grinding on the squaretube, so that the cutting and end surface grinding integrated equipment is realized, and a large amount of manpower and financial resources are reduced.

A planarization apparatus and method that thins and planarizes a substrate by grinding and polishing the rear surface of the substrate with high throughput, and that fabricates a semiconductor substrate with reduced adhered contaminants. A planarization apparatus that houses various mechanism elements in semiconductor substrate loading/unloading stage chamber, a rear-surface polishing stage chamber, and a rear-surface grinding stage chamber. The throughput time of the rear-surface polishing stage that simultaneously polishes two substrates is typically about double the throughput time of the rear-surface grinding stage that grinds one substrate.

An abrasive disc which has plural abrasive chips having an abrasive layer on a metal piece and being arranged in a peripheral portion of a disc substrate with a predetermined space comprises a suspension plate placed between the disc substrate and abrasive chips and an elastic sheet placed between the disc substrate and the suspension plate, wherein the disc substrate consists of a plastic resin including fiber, the abrasive chips have stakes therein and the suspension plate has through-holes to which the stakes are deformed therein. Each of the abrasive chips has abrasive surfaces including a top abrasive surface and peripheral surfaces and the outer peripheral portion and the inner peripheral portion are declined to the top surface. The abrasive discs have a combination of different abrasive chips fabricated by different bonding metals for the fabrication of the abrasive chips.

The invention discloses a basketball stand backboard surface grinding device, and relates to the technical field of backboard machining. The basketball stand backboard surface grinding device comprises a supporting frame, a movable frame is slidably mounted on the supporting frame, clamping blocks used for clamping the backboard are symmetrically arranged on the movable frame, the top of the supporting frame is fixedly provided with an operation box, the supporting frame is fixedly provided with a double-shaft motor, and one output shaft is coaxially and fixedly provided with an incomplete bevel gear meshed with a bevel gear I or a bevel gear II. According to the grinding device, a grinding plate rotates along with a rotating shaft, so that rotary grinding of the surface of the backboard can be realized, meanwhile, the grinding plate can perform transverse reciprocating motion, so that the grinding effect of the backboard is further promoted, the grinding range is wider; and an incomplete gear is arranged to be alternately meshed with two inner racks to achieve reciprocating movement of the movable frame, so that the backboard on the movable frame can move in a reciprocating mode,and the movement direction is perpendicular to the translation direction of the grinding plate, therefore the grinding efficiency is greatly improved, and comprehensive grinding of the backboard is realized.

An ultra-precise processing integrated platform for a large caliber optical mirror surface solves the problem that processing and detection are not integrated while processing the large caliber optical mirror surface in the conventional optical processing technical field. The platform integrates grinding, detection and milling for processing the large caliber optical mirror surface, and comprises a base, a horizontal moving device, a rotation device, an ultra-precise grinding device, a mirror surface detection device and a milling device, wherein the horizontal moving device drives the rotation device to move to a workpiece mounting position, a grinding position, a surface shape detection position and a milling position in a horizontal direction; a vertical moving device drives a spindle system and a diamond grinding wheel to move up and down in a vertical direction; the spindle system can adjust the inclined angle of the diamond grinding wheel; the diamond grinding wheel has a cambered surface; when in the workpiece mounting position, the rotation device can conduct cambered surface grinding on a workpiece; when in the surface shape detection position, the rotation device can conduct surface shape detection on the workpiece; when in the surface shape detection position, the rotation device can mill the workpiece.

The invention provides a diamond tool bit bottom surface grinding device, which belongs to the technical field of the operation. The problem that the traditional diamond tool bit bottom surface grinding has low production efficiency because of grinding by a common machine tool is solved. The diamond tool bit bottom surface grinding device comprises a rack, wherein the rack is provided with a first grinding mechanism, a transfer discrimination mechanism and a second grinding mechanism, wherein the first grinding mechanism can be used for grinding the certain end surface of a diamond tool bit into a bright surface; the transfer discrimination mechanism can be used for transferring out the diamond tool bit capable of grinding the certain end surface of the diamond tool bit into the bright surface, can be used for judging whether the bright surface is positioned on the bottom surface or a tool surface and enables the diamond tool bit to face to the same direction according to the judgment result; and the second grinding mechanism can be used for bearing the diamond tool bit with the same facing direction of the transfer discrimination mechanism and can be used for grinding the diamond tool bit bottom surface. The diamond tool bit bottom surface grinding device has the advantages of convenience in production, labor force saving, high automation degree and high efficiency. According to the test, the diamond tool bit bottom surface grinding device can be used for grinding ten diamond tool bit bottom surfaces in one minute.

A surface grinding machine generally consisting of a drive means provided with an output shaft; a planetary disk mounted on the shaft; and at least two grinding head units mounted on the planetary disk, each including a housing mounted on the planetary disk, a shaft having a flange portion, journaled in the unit housing, resilient means interposed between the housing and the flange portion of the unit shaft and a disk provided with a grit surface disposed on an outer side of the flange, portion of the unit shaft.

A wafer dividing method that includes a modifying layer forming step in which a laser beam with a wavelength that can pass through the wafer is focused on the inside of the wafer from a rear surface side thereof, and applied along the street to form a modifying layer having a thickness corresponding to at least a device-finishing thickness from the front surface of the wafer; a rear surface grinding step in which an area, corresponding to the device area, of the rear surface of the wafer subjected to the modifying layer forming step is ground and formed to have a thickness corresponding to the device-finishing thickness and to have an annular reinforcing section at an area corresponding to the outer circumferential redundant area; a reinforcing section cutting step in which the wafer is cut along the inner circumference of the annular reinforcing section; a wafer support step in which the rear surface of the wafer whose annular reinforcing section is cut is stuck to a dicing tape attached to an annular frame; and a wafer rupture step in which an external force is applied to the wafer stuck to the dicing tape to rupture it along the street formed with the modifying layer.

The invention relates to a panel surface grinding device and grinding method with multi-degree of freedom. The panel surface grinding device with the multi-degree of freedom comprises a left side plate and a right side plate, a transmission mechanism, a driving mechanism, a grinding mechanism and a lifting table mechanism; the transmission mechanism and the lifting table mechanism are both fixedly connected with the inner sides of the left side plate and the right side plate, and the driving mechanism and the grinding mechanism are connected with the transmission mechanism. By means of the adjustment of the mechanisms, position adjustment is achieved in the directions of X, Y and Z; by means of own characteristics of an articulated mechanism, and the adjustment of different grinding angles on a panel surface is achieved. The grinding direction can be adjusted according to the own characteristics of products and the grinding requirements, the grinding direction is adjusted, the grinding of a panel with the multi-degree of freedom is achieved, the grinding limitation of an existing automatic grinder is improved, manual operation is replaced by automatic processing by using a machine, the labor intensity of workers is relieved, the production efficiency is improved, and the production quality of the products is guaranteed.

The invention discloses an active compliance robot grinding system with controlled pressure and changeable speed. The active compliance robot grinding system with the controlled pressure and the changeable speed comprises an industrial robot, a controlled pressure compliance grinding tool, a detection module and a computing control module. The industrial robot moves and locates the controlled pressure compliance grinding tool in a three-dimensional space. An optical mirror surface is compliantly grinded by the controlled pressure compliance grinding tool with the controlled pressure and the changeable speed. An actual surface shape of the optical mirror surface is measured by the detection module. The computing control module plans a grinding track, a pressure, a rotating speed and a dwell time according to comparing the actual surface shape and a target surface shape to obtain an error curved surface, and the industrial robot and the controlled pressure compliance grinding tool are controlled to carry out complicated optical mirror surface grinding which is high in rate of convergence.

The invention relates to a novel wood plastic anticorrosive wallboard for outdoor wall decorations and a production method thereof. The wood plastic anticorrosive wallboard consists of PE or PP plastic, wood powder or bamboo powder, calcium carbonate, coupling agent, lubricant, antiaging agent, antibacterial agent and colouring agent. The production method comprises the following steps that: the raw materials are subject to mixing, granulation and extrusion molding to obtain a baseplate, and the baseplate is subject to cooling, cutting, surface grinding, and embossing to obtain a product. The side of the baseplate is a slot structure, and the water absorption of the baseplate in 24h is 0.2%. The wallboard used in the field of outdoor decorations has the advantages of graceful appearance, lifelike pattern, reasonable structural design, being easy to install, fireproofing, waterproofing, insect preventing, sun protection, aging resistance, no formaldehyde, good sound-absorbing effect, good antibacterial and anticorrosive effects and the like, and being 100% recyclable. Compared with other wallboard decorative materials and production technologies existed in the prior art, the novel wood plastic anticorrosive wallboard disclosed in the invention has reasonable structure, and graceful and beautiful appearance, and the production method is advanced and scientific, with high production efficiency, and good performance of the produced products.

The invention relates to the field of grinding machine used for mechanical processing, in particular to a numerically controlled multi-functional surface grinding machine which comprises an upright post, a vertical grinding wheel head mechanism, a horizontal grinding wheel head mechanism, an operation box, a worktable mechanism and a base; both the vertical grinding wheel head mechanism and the horizontal grinding wheel head mechanism are arranged on the upright post; and the upright post, the operation box and the table mechanism are all arranged on the base. Compared with the prior art, the invention adopts the matched use of the vertical grinding wheel head mechanism and the horizontal grinding wheel head mechanism which are linked with the reciprocating motion of a worktable and form fully closed loop control by being matched with the information of related position of the feedback of a precise linear scale, and realizes the grinding of planes, curved surfaces or guide surfaces and the like after one-time clamping of the workpiece, thus having higher production efficiency and higher cost performance.

The invention relates to a flat glass surface grinding device which can meet the processing requirement of large-area flat glass and a grinding method thereof; the grinding device comprises a grinding worktable, a base and a frame, wherein, the grinding worktable is arranged on the guide rail, independently moves along the X direction or along the Y direction and is used for mounting a glass substrate; the base is used for bearing a guide rail; the frame spans over the two sides of the grinding worktable and is fixedly connected with the base; two or more grinding heads are arranged on the frame above the grinding worktable and is driven by a power device to rotate; all grinding heads are arranged on a revolution bracket which is connected with a rotation shaft of a revolution bull gear; the revolution bull gear is meshed with a gear on an output shaft of a revolution driving motor; the rotation shaft of the revolution bull gear is connected with an ascending-descending cylinder of the grinding heads and is driven by the ascending-descending cylinder to ascend and descend; the grinding pressure of the grinding heads are adjusted by the ascending-descending cylinder; even grinding is achieved by the rotation and revolution of a plurality of grinding discs and the motion of the worktable. The grinding device and the grinding method have good grinding efficiency and can be applied to a surface polishing process in the field of liquid crystal glass substrate.

The invention relates to a method for producing thin monocrystalline silicon polished wafer. The method comprises the following steps: Step 1, monocrystalline silicon is sliced up by adopting wire cutting; Step 2, a slotting double-face grinder which adopts a stainless steel planetary sheet with an internal circle inlaid with a soft rubber ring is adopted to carry out double-surface grinding on the sliced monocrystalline silicon; Step 3, a technique of acid corrosion thinning is adopted, wherein, the removal amount resulted from acid corrosion is 10 micrometers to 60 micrometers; Step 4, a nanometer grinding technique is adopted, wherein, the removal amount resulted from nanometer grinding is 1 micrometer to 25 micrometers; and Step 5, a wax polishing technique is adopted, wherein, the removal amount resulted from wax polishing is 5 micrometers to 30 micrometers. By adopting a new technical route and a new technical procedure for producing new thin monocrystalline silicon polished wafer, the invention effectively improves TTV level, WARP level, TIR level, STIR level and other levels as well as the finished product rate of the thin monocrystalline silicon polished wafer.

The invention discloses a metallographic automatic grinding polishing machine and comprises an electric control unit, a hydraulic unit, a cooling water unit, a polishing spindle unit and a rotational grinding disc unit; wherein, the polishing spindle unit (1) is arranged above the rotational grinding disc unit (2); and the polishing spindle unit (1) and the rotational grinding disc unit (2) respectively adopt independent motors for rotation control and play a part in the polishing spindle unit (1) by controlling and outputting processing parameters through the electric control unit, thus achieving the surface grinding polishing treatment of high hardness metal of aluminium alloy, titanium-aluminium alloy, siliconiobium, etc.

The invention discloses a sintering process method and device for producing microcrystalline glass by using blast furnace slag, belonging to the field of metallurgical and inorganic non-metallic materials. The process method comprises the following main steps that: (1) blast furnace slag is transferred to a composition hardening, tempering and stirring tank, a modifier, a coloring agent and a nucleating agent are added into the tank, the obtained mixture is uniformly stirred, and the temperature of the slag is ensured; (2) the slag enters a water quenching pond through a slag inlet and is quenched with water so as to form glass particles; (3) after the glass particles are finely ground and screened, qualified glass particles are dried; (4) the dried glass particles are distributed on a shelf board and enter a nucleating area; (5) after the temperature of the nucleating area arises to 700-800 DEG C, the glass particles are subjected to heat preservation; (6) after entering a crystallization area, the glass particles are heated to 900-1100 DEG C and then subjected to heat preservation; and (7) the glass particles enter a cooling area to be cooled, thus obtaining products; and then the qualified products are subjected to surface grinding and polishing, thus obtaining a finished product microcrystalline glass. According to the invention, blast furnace slag and solid waste resources are fully used, and the product microcrystalline glass has the advantages of high strength, corrosion resistance, multiple colors and the like and has remarkable economic benefits and environmental protection benefits.

The invention provides a coarse grinding and accurate grinding combined machining machine tool, which mainly comprises the following components: a substrate (1), substrate guide rails (2), a machine tool body (3), pillars (10), a top beam (7), a second servo motor (8), a spindle motor (6), a replaceable spindle box (5), a tool head (4), supports (11), lift cylinders (12), foot pads (9) and the like. By adopting the machine tool provided by the invention, machining efficiency and machining quality of workpiece surface grinding can be greatly increased.

The invention provides a method of manufacturing a semiconductor device which achieves high reliability and high yield as well as high production efficiency. Back surface grinding (back grinding) is performed to a semiconductor substrate to thin the semiconductor substrate. A damaged layer formed by the back surface grinding is not removed at this time, and a photoresist layer is selectively formed on the back surface of the semiconductor substrate. The semiconductor substrate is then etched using the photoresist layer as a mask to form a via hole. The photoresist layer is then removed with the semiconductor substrate still placed in an etcher used in the etching process subsequently after the formation of the via hole. In this manner, the etching process and the next ashing process are performed sequentially in one apparatus. Then a process of removing the damaged layer on the back surface of the semiconductor substrate and a process of smoothing the sidewall of the via hole are simultaneously performed subsequently after the ashing process in the same apparatus.

The invention discloses an automatic finishing machine tool for two planes of a sealing ring. The automatic finishing machine tool for two planes of a sealing ring comprises a machine tool body, a turnplate, a feeder, a grinder, a plane turning device and a discharger, wherein twelve stations are arranged on the turnplate along the circumferential direction and respectively provided with a tooling which is used for fixing the sealing ring, the sealing ring is fixed on the tooling of one station of the turnplate by the feeder, then is subjected to upper surface grinding, plane changing and lower plane grinding in sequence, and finally is output by the discharger, the plane turning device clamps and rotates the sealing ring at the corresponding station by 180 degrees through a rotary cylinder so as to be fixed on the tooling of the corresponding station after the upper plane and the lower plane are exchanged, thus realizing finishing of two planes. The automatic finishing machine tool has the advantages of being reasonable in structure, small in occupied area, low in cost and the like.

The invention discloses a metallographic grinding and polishing process. The metallographic grinding and polishing process comprises the steps that (1) the surface of a metallographic specimen is cleaned; (2) the surface of the metallographic specimen is ground; (3) the metallographic specimen is polished; and (4) cleaning is conducted. The metallographic specimen is cleaned and polished through vibration of an ultrasonic washing unit, when the metallographic specimen is cleaned, liquid inside the ultrasonic washing unit is industrial pure water, diamond abrasive grains, polishing paste and glycerinum are put into the ultrasonic washing unit for cleaning, resources can be saved, and influence on the subsequent grinding and polishing process can be avoided; a rubber soft bottom is arranged at the bottom of the metallographic specimen, so that the surface is prevented from being scratched in the grinding process, the metallographic specimen is dried for many times, oxidation of easily oxidized metals can be prevented in the operation process, and it is ensured that the surface of the metallographic specimen is even in color and has no water spot; coating of antirust agents is avoided, and the retention time is long in a vacuum environment.

The invention relates to a silanization treatment method before coating of a steel piece, in particular to a pretreatment method which is cheap, simple in operation, environmentally-friendly and pollution-free and effectively improves the bonding strength of the steel piece and a subsequent organic coating. The method solves the bonding problem of the steel piece and the coating in the prior art. The method comprises the following steps of: performing pretreatment such as surface grinding, polishing, degreasing and the like on the steel piece; and then performing silanization treatment on the degreased workpiece, wherein a silane film obtained on the surface of the workpiece has functional group components such as epoxy group, amino group and the like matched with the coating. By the method, chemical bonding of the subsequent coating and the steel piece is realized by silanization treatment, the bonding force of the coating is improved, no slag is produced in the treatment process, treatment time is short, and the method is simple and convenient to control; and the treatment step is few, surface conditioning and passivation processes can be saved, and bath solution is long in service life and simple in maintenance.

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 discloses a ceramic bond CBN (Cubic Boron Nitride) abrasive wheel for double end surface grinding, which consists of a matrix, a grinding wheel block and a bonding layer, wherein the grinding wheel block consists of the following raw material components according to mass percent: 30-80% of CBN abrasives, 0-35% of white sapphire, 15-30% of ceramic bond, 5% of bonding wetting agent and 0-12% of pore creating material; the ceramic bond consists of the following raw material components according to mass percent: 45-55% of SiO2, 9-12% of Al3O3, 15-20% of B2O3, 4-8% of Na2O, 4-8% of K2O, 4-12% of MgO and 0-10% of Na3AlF6; the sintering temperature of the ceramic bond is lower than 900 DEG C; and the pore creating material is of polymetylmethacrylate (PMMA) microspheres. The invention provides an end surface grinding wheel which is capable of efficiently machining flat and flaky high-speed steel, alloy steel and cast iron parts and has the characteristics of high machining precision of workpieces, good air hole adjustability, high grinding efficiency, long service life and low comprehensive grinding cost of the workpieces.

The invention discloses a multi-angle two-dimensional ultrasonic vibration-assisted nanofluid minimized quantity lubricating and grinding device. The device comprises a workpiece clamp for clamping a workpiece and a grinding wheel for grinding the workpiece, wherein the workpiece clamp is connected to a two-dimensional ultrasonic vibrating device so as to maintain the degree of sharpness of the cutting edge of the grinding wheel and reduce the surface grinding temperature of the workpiece; an injection mechanism for injecting a nanofluid to the workpiece is arranged on one side of the grinding wheel to form coupling of two-dimensional ultrasonic vibration and nanofluid minimized quantity lubrication and grinding. The device applies a variable-angle two-dimensional ultrasonic vibration technology to grinding, and different combined vibrating directions are generated by adjusting the angles of two ultrasonic vibrators, so that the relative movement tracks of abrasive particles and the workpiece are changed. The grinding force and the grinding temperature are detected in real time through a force measuring device and a temperature measuring device, and meanwhile, the device is matched with nanofluid minimized quantity lubrication, so that the machining quality of the workpiece is further improved, and the thermal injury of the workpiece is avoided.

A plastic mold for hot-spray nanometer composite ceramic coating and a production method thereof are provided. The plastic mold is composed of a plastic mold steel basal body, a bottom bonding layer and a nanometer composite ceramic working layer produced by hot-spray technology. The bottom bonding layer adopts any of the Ni/AI, AI/NI or NiCrAl materials. The nanometer composite ceramic working layer adopts the material of granular ball-shaped nanometer composite hot-spray coating powder which is a compound of chromium oxide chromium sesquioxide, titanium dioxide and silicon dioxide. The production method comprises the following steps: firstly, preparing hot-spray coating on mold steel workpieces to be processed according to standard and optimized hot-spray process; secondly, conducting surface grinding and polishing to meet the technical requirements for the size, precision, surface toughness, etc. of the plastic mold. The production method is simple, low in production cost and easy to industrialize, and realizes the high-quality characteristics of the plastic mold such as high rigidity, high wear resistance, high corrosion resistance, long service life, and easiness to de-mould, so that the method has good market application prospect and high commercial value.