67results about How to "High surface finish" patented technology

The invention relates to the technical field of wire and cable processing equipment, in particular to a wire and cable copper wire drawing machine which comprises a machine table and the like, a pay-off device, a fixing plate and a pull rod are sequentially and fixedly mounted on the machine table from left to right, a wire drawing box is slidably connected to the position, close to the pull rod, of the machine table, and a fixed wire drawing module is fixedly connected to a side plate of the wire drawing box; the top end of the wire drawing box is fixedly connected with a lubricating liquid box, a hand pressure valve is installed between the wire drawing box and the lubricating liquid box, the hand pressure valve is connected with the fixed wire drawing module through a liquid pipe, and the hand pressure valve makes contact with the pull rod. Through the cooperative design of the hand pressure valve and the pull rod, automatic conveying control over lubricating liquid is achieved, in the wire drawing process, along with movement of the wire drawing box, the hand pressure valve is automatically opened, the lubricating liquid is accurately conveyed to the position where the wire drawing module is fixed, timely and effective lubrication is provided for a copper wire, and friction and abrasion between the copper wire and the wire drawing module are reduced.

The application discloses a die-casting device for window sliding wheel machining, which comprises an operating machine table arranged on the ground, a die-casting base fixedly arranged at the middle of the bottom of the inner cavity of the operating machine table, and a limiting guide rod fixedly arranged at the top of each corner of the die-casting base, and belongs to the technical field of die-casting. The die-casting device for window sliding wheel machining is characterized in that the upper die, the hydraulic rod, the lower die mechanism and the electric telescopic rod are matched to realize efficient and stable die-casting. During die-casting, the structures are cooperatively driven to automatically circulate and flow the cooling liquid, the cooling and shaping are rapidly completed, the processing efficiency is effectively improved, the circulating cooling liquid can drive the inside of the lower die mechanism to generate high-frequency oscillation, the internal bubble defects of the casting are eliminated, the product structural strength and surface quality are improved, meanwhile, the cooling liquid is uniformly disturbed in the die to improve the heat exchange efficiency, the temperature of the cavity is rapidly and evenly balanced, the deformation and cracking of the casting are prevented, the forming precision and product qualification rate are ensured, and the overall structure is simple, stable and reliable in operation.

This invention discloses a free-machining high-strength aluminum-lithium alloy, its preparation method, and its applications, belonging to the field of alloy materials technology. The free-machining high-strength aluminum-lithium alloy has the following weight percentages of elements: Li: 3.5–5.5%, Cu: 2.6–3.1%, Zn: 6.8–7.1%, Mg: 2.1–3.0%, Y: 1.5–4.0%, Bi: 0.85–1.05%, In: 0.05–0.08%, Cr: 0.05–0.45%, Ti: 0.02–0.04%, with the balance being Al. This invention involves batching, smelting, refining, online refining, online degassing and filtration, casting, homogenization, extrusion, and two-stage aging treatment to finally obtain a free-machining high-strength aluminum-lithium alloy with a uniform microstructure. This invention has a reasonable component ratio, low manufacturing cost, and the resulting product has excellent strength and hardness, and exhibits excellent surface finish after dry machining.

The invention provides a gradient functional composite material, a preparation method and application of the gradient functional composite material to a die-casting die. The composite material sequentially comprises a bonding layer, a metastable-state high-entropy alloy relaxation layer, a component gradient transition area and a dynamic densification composite surface layer from a base body to the surface. Wherein the relaxation layer can generate reversible martensite phase transformation at the die-casting temperature so as to actively dissipate thermal stress; the composite surface layer contains a low-melting-point nanophase, and can flow at high temperature to realize self-repairing and dynamic lubrication of surface micro-damage. According to the composite material, gradient transition and metallurgical bonding between layers are achieved through continuous process modulation. The coating system provided by the invention has multiple synergistic protection mechanisms of active stress digestion, interface gradient relaxation and surface self-adaptive repair, and can remarkably improve the thermal fatigue resistance, melting loss resistance and demolding performance of the die-casting die, so that the service life of the die is greatly prolonged.

The application discloses a surface-defect-free high-purity oxygen-free copper wire manufacturing method based on continuous extrusion, relates to the field of non-ferrous metal precision machining technology, and directly adopts an up-drawing continuous casting billet to extrude a target specification wire rod in one step through continuous extrusion, so that a plurality of drawing processes and at least one intermediate annealing process in a traditional process are completely omitted, a process flow is compressed by more than 60%, a production cycle is significantly shortened, equipment investment, labor cost and energy consumption loss are reduced, wire rod production efficiency is greatly improved, large-scale production cost is greatly reduced, and the application has a strong industrialization advantage; the continuous extrusion process introduces large plastic deformation, can strongly break original as-cast coarse grains, and simultaneously compacts and eliminates internal defects such as pores and shrinkage porosity generated in the up-drawing continuous casting process, and improves wire rod density. Compared with a traditional processing method, the wire rod prepared by the application avoids problems such as annealing oxidation, uneven structure and performance fluctuation, and the elongation of a finished product is greater than or equal to 40%.

The utility model relates to a stainless steel pipe fitting port forming device which comprises a bottom plate, two sets of upper clamping plates and lower clamping plates are installed on the upper surface of the bottom plate through a clamping mechanism, lower V-shaped plates are installed on the two sides of the upper surface of each lower clamping plate, upper V-shaped plates are installed on the lower surfaces of the upper clamping plates, and the upper V-shaped plates are arranged between the two lower V-shaped plates. A baffle is mounted on the upper surface of the bottom plate through a translation mechanism; a hydraulic cylinder is mounted on the upper surface of the bottom plate, and a flaring head is mounted at the telescopic end of the hydraulic cylinder through a bolt. The lower V-shaped plate and the upper V-shaped plate are driven by the clamping mechanism to get close to each other to clamp the stainless steel pipe fittings, the stainless steel pipe fittings of different sizes can be fixed, the axes of the fixed stainless steel pipe fittings are consistent with the axis of the flaring head all the time, and therefore the flaring device can be suitable for flaring the pipe fittings of different sizes and is wide in application range.

The utility model discloses a kind of circular non-standard knife holders, belong to oil cylinder production and manufacturing technical field, a kind of circular non-standard knife holder, including knife holder box body, knife holder box body is ladder structure, is successively provided upper ladder surface, side surface and middle ladder surface, the top end between upper ladder surface and the bottom end surface of knife holder box body is provided with vertical installation round hole groove structure, round hole groove and strip-shaped through hole are provided with between middle ladder surface and the bottom end surface of knife holder box body circular through hole, transverse side of knife holder box body is provided with transverse installation round hole groove structure, and circular cutter installation groove is set up on side surface, and circular cutter installation groove is located between upper ladder surface, middle ladder surface.It can improve the cutting position of blade, enhance the utilization of cutting edge, reduce the use cost of scraping and rolling light cutter, improve processing precision and stability, improve the surface finish of workpiece, reduce the loss of wear, while can avoid chip accumulation, ensure processing efficiency and the surface quality of processing product.

This invention relates to the field of machining technology, and discloses a machining method for insert placement and the insert itself. The machining method for insert placement includes the following steps: Step S10, the insert placement blank includes an open area and a closed area. The insert placement blank is clamped onto a CNC machine tool, and the open area of ​​the insert placement blank is CNC machined to obtain a semi-finished insert placement product with a 0.03mm wire EDM machining allowance in the open area. The height of the open area of ​​the semi-finished insert placement product is greater than or equal to 20mm. Step S20, the open and closed areas of the semi-finished insert placement product are wire EDM machined to obtain multiple finished inserts. This invention, by reserving a 0.03mm allowance in CNC machining, is reasonably designed to avoid wire clamping and wire EDM springback problems caused by slow wire cutting, ensuring the surface finish of the product and meeting the machining requirements, while not affecting the wire EDM machining efficiency.

The invention belongs to the technical field of aviation machining, and discloses a numerical control machining method for a magnetically soft alloy large-length-diameter-ratio thin-wall rotary workpiece, which comprises the following steps of: clamping the outer circle of the workpiece, penetrating a mandrel through an inner hole, and carrying out rough machining and finish machining on the outer circle at one end of the workpiece; turning around, clamping the outer circle of the workpiece, enabling an inner hole to penetrate through a mandrel, and performing rough machining and finish machining on the outer circle of the other end of the workpiece; the outer circle of the workpiece is clamped, the end face of the workpiece is flattened, an inner hole is bored, and back gouging is conducted on the root of the hole; and turning around, clamping the outer circle of the workpiece, flattening the end face of the workpiece, and turning and adjusting a threaded hole. The problem that in the existing thin-wall part machining process, wall thickness uniformity and consistency control are poor is solved, the machining efficiency is high, and the machining quality is stable and reliable.

The invention discloses a steel pipe cleaning mixed solution, a preparation method thereof and a method for cleaning pollutants on the surface of a steel pipe, and belongs to the field of metal surface treatment. The invention aims to solve the problems of low cleaning efficiency, non-uniform surface treatment effect, poor system stability and the like due to the adoption of a single acidic medium or a simple compound system in the traditional steel pipe cleaning method. According to the method, a mixed solution composed of nitric acid, ammonium bifluoride, sodium sulfate, 1-hydroxyethylidene-1, 1-diphosphonic acid, pyridinium propane sulfonate, a brightener, an emulsifier and water is adopted as a steel pipe cleaning medium. The steel pipe cleaning agent is scientific in formula component matching, high in cleaning efficiency, capable of effectively improving the surface state of a steel pipe, simple, convenient and feasible in operation process, environmentally friendly, suitable for batch cleaning treatment of related steel pipes and good in practicability and economical efficiency.

This utility model discloses a sand mold manufacturing equipment for casting water glass. A molding base plate is sequentially conveyed to a coating component, a sand filling component, a compaction component, a hardening component, and a demolding component via a conveying assembly to complete the sand mold manufacturing. During the manufacturing process, the mold surface is covered with a thin film, improving the surface smoothness of the mold and thus enhancing the surface quality of the sand mold cavity, thereby improving the surface quality of the casting. The thin film also separates the sand mold from the model, significantly reducing demolding resistance. Therefore, the draft angle can be appropriately reduced, improving the dimensional accuracy of the casting. Furthermore, during demolding, issues such as scratching the cavity or localized damage to the cavity are avoided, reducing the workload of subsequent sand mold repair. Improving the surface quality of the sand mold further enhances the surface quality of the casting, while simultaneously reducing wear on the model from the sand mold, ensuring the dimensional accuracy of the model, extending the model's service life, and further improving the dimensional accuracy of the casting.

The utility model provides a kind of spinneret, belong to textile machinery technical field.Its structure includes: a plurality of shunt cone is arranged to form array in the upper end of spinneret body, the shape of the array is regular hexagon, there are a plurality of spinneret hole in the periphery of each shunt cone;Every two adjacent shunt cone is arranged at equal intervals;Every two adjacent spinneret hole is arranged at equal intervals.The utility model is designed with new structure, can optimize the spinning process of fiber, improve the dispersion uniformity and surface quality of fiber.Through the structure design and material selection of spinneret, realize efficient, stable fiber production.The spinneret includes spinneret body and multiple spinneret holes arranged on the spinneret body.The shape, size and arrangement of spinneret hole are carefully designed to achieve uniform dispersion of fiber.At the same time, spinneret body is made of high-temperature-resistant and wear-resistant material to ensure stability in high temperature and high pressure environment.

This invention provides a flame-retardant, high-transmittance, and weather-resistant composite material for LED lampshades and its preparation method. By weight, the raw materials include: 80-95 parts bisphenol A type polycarbonate, 4-10 parts phenyl-containing polysiloxane microspheres, 1-4 parts mesoporous silica phosphorus-loaded microspheres, 0.3-0.8 parts silane coupling agent, 0.3-0.8 parts flame retardant, 2-5 parts organic nano-montmorillonite, 0.2-0.6 parts polycarbodiimide, 0.3-0.8 parts antioxidant, 0.3-0.7 parts light stabilizer, and 0.3-1.0 parts lubricant. The flame-retardant, high-transmittance, and weather-resistant composite material for LED lampshades provided by this invention possesses comprehensive properties of high light transmittance, high toughness, and heat resistance.

The utility model discloses a polishing sheet outer coating spraying device, which relates to the technical field of polishing sheet production and processing, and comprises an operation table, a rotating mechanism mounted outside a vertical plate, a first connecting block slidably connected to the tail end of a first rotating seat, and a clamping mechanism mounted between the first connecting block and the interior of the first rotating seat. Adsorption mechanisms are installed outside the first connecting block and the second connecting block, a vertical base is slidably connected to the upper side of the operation table in a limiting mode, a partition plate is fixedly connected to the interior of the vertical base, spraying mechanisms are symmetrically installed on the upper side of the partition plate, a conveying mechanism is installed below the partition plate, and a through groove is formed in the outer portion of the vertical base. According to the device, polishing pieces with different thicknesses are compatible through magnetic attraction and elastic self-adaptive clamping, double-face synchronous spraying is achieved in combination with rotation driving, paint is evenly atomized through a hollow material distribution plate, the whole surface is covered with the coating in the circumferential direction in the continuous rotation process, the manual turning step is omitted, the spraying efficiency and the coating uniformity are remarkably improved, and the operation process is simplified.

The present application provides a kind of forging die and valve cover flashless forging method, the forging die includes mutually slidingly connected die inner ring and die outer ring, die inner ring has first accommodating cavity suitable for accommodating blank, die outer ring has inner wall surface suitable for accommodating blank and die inner ring, and the inner wall surface is jointly enclosed with the top surface of die inner ring to form second accommodating cavity suitable for accommodating blank, first accommodating cavity is communicated with second accommodating cavity, die outer ring has start forging state that is lifted to first height, and finish forging state that die outer ring bottom surface is flush with die inner ring bottom surface, slidingly connected die inner and outer ring can accommodate blank of different sizes and shapes, die inner ring and die outer ring are switched between start forging state and finish forging state by sliding to complete the forging of blank, and due to the downward movement of die outer ring following blank during forging, the radial deformation generated by blank forging pressure is converted into axial allowance, the generation of flash is reduced, and processing efficiency and processing quality are improved.

The invention discloses a constant-temperature fusion covering forming mechanism for granular resin 3D printing, and relates to the technical field of granular resin 3D printing, the constant-temperature fusion covering forming mechanism comprises a built-in frame and a third servo motor, auxiliary assemblies used for assisting feeding are arranged on the two sides of the interior of the built-in frame, and each auxiliary assembly comprises an auxiliary frame, a second hydraulic rod, a built-in plate, a material guide frame and a material guide pipe; a second hydraulic rod is arranged in the auxiliary frame. According to the constant-temperature cladding forming mechanism for granular resin 3D printing, the dual-heating design is adopted through the auxiliary assembly, heating wires in a material guiding frame and an auxiliary frame are matched with an S-shaped material guiding pipe, granular resin is fully preheated, the melting temperature is kept stable through a heat preservation layer outside a material barrel, and the situation that the forming quality is affected by temperature fluctuation is avoided; the two sets of built-in plates improve the feeding efficiency, meanwhile, a fault auxiliary discharging function is achieved, the hollow structure of the auxiliary frame and the design of a threaded cover are convenient to maintain, the phenomena of material blocking and material breaking are effectively reduced, and the printing efficiency and stability are improved.

The utility model discloses a lithium battery shell stamping die device with cleaning function belongs to stamping die technical field, include: upper die plate and lower die plate, set up the board to set up the board bottom end is equipped with male module, the lower die plate upper end is equipped with the bottom plate, the utility model discloses, when lithium battery shell stamping die device operation, cleaning brush can real -time sweep the dust and chippings of convex module surface attachment, and dust absorption groove and dust absorption hole are through the negative pressure effect and rapidly absorb dust chippings etc, realize the seamless link of cleaning action, not only cover the traditional device difficult to reach corner area, more through the dual effect of dynamic cleaning and static adsorption, greatly reduce the interference of tiny particle to die precision, make lithium battery shell in the stamping process can keep higher size consistency and surface finish, so that the lithium battery shell stamping die device with cleaning function uses the practicality better.

The nickel-titanium alloy wire drawing machine comprises a wire drawing machine body, a thinning part, a transition part and a collecting part, a first working cavity, a second working cavity and a third working cavity are formed in the wire drawing machine body, and the second working cavity is communicated with the third working cavity; the thinning component is installed in the first working cavity, the thinning component comprises a first thinning assembly and a second thinning assembly, the thinning component is suitable for thinning the nickel-titanium alloy entering the first working cavity, and the first working cavity is provided with a thinning outlet; the transition part comprises a first transition wheel and a second transition wheel, and the first transition wheel is rotationally mounted on the wire drawing machine body through a mounting shaft, so that the problems of wire breakage and surface damage caused by high temperature generated when a nickel-titanium alloy material is processed by traditional wire drawing equipment can be effectively solved; therefore, the processing quality and the production efficiency of the nickel-titanium alloy wire are improved.

The application provides a centerless grinding machine for surface treatment of alloy shaft workpieces, which comprises a centerless grinding machine body, a support frame, an equidistant moving device and a limiting mechanism, and relates to the alloy shaft machining technical field. The support frame and the equidistant moving device are matched and arranged on the feeding side of the centerless grinding machine body. The installation spacing of each group of guide units can be flexibly adjusted according to alloy shaft workpieces of different lengths, the machining requirements of workpieces of various specifications can be met, and through the mutual cooperation of the guide units, the transmission units and the driving units, the bidirectional movement of the alloy shaft workpiece self-rotation and axial advancement can be compatible on the basis of stable multi-point support and limiting of the alloy shaft workpiece, the workpiece stable feeding operation is realized, the problems of workpiece head warping, deviation and grinding vibration in the traditional machining process are effectively eliminated, the workpiece machining radial runout is greatly reduced, and the roundness, straightness and surface smoothness of the alloy shaft workpiece after machining are effectively improved.

This invention belongs to the field of weaving equipment technology and discloses a pretreatment device for a circular loom, including a housing with multiple ferrules installed at the bottom. One end of the housing is fixedly installed with an inlet plate having multiple inlet guide holes. Inside the housing, along the yarn travel direction, are sequentially arranged an infrared heating tube group, an atomizing nozzle group, a parallel electrode plate, a simulated weaving guide roller group, a low-temperature plasma generator, a heated pressure roller group, and a cold air cooling unit. The other end of the housing is fixedly installed with an outlet plate having multiple outlet guide holes. This device integrates multiple pretreatment functions into one housing, realizing integrated continuous operation of yarn pretreatment. It can effectively release internal yarn stress, remove surface fuzz from the yarn, improve yarn flexibility and surface quality, thereby reducing the shrinkage rate of the base fabric, reducing yarn breakage during weaving, improving the production efficiency and product quality of the circular loom, and reducing production costs.

The utility model discloses silica sand particle grinding and shaping equipment which comprises a base and a group of vertical mounting plates mounted on two sides of the base, a rotating table is movably mounted between the group of vertical mounting plates, a grinding and shaping mechanism is arranged on the rotating table, and reciprocating rotating mechanisms are connected to two sides of the rotating table. And the grinding and shaping mechanism comprises an inner cavity, a rotating motor I, a rotating shaft, a bearing frame, a group of rotating shafts, a group of grinding cylinders, a group of mounting frames, a group of threaded sleeves, a group of threaded rods and a group of sealing covers. The device has the beneficial effects that silica sand particles needing to be ground and shaped and a proper amount of steel balls are put into a group of grinding cylinders, the rotating motor I drives the group of grinding cylinders to rotate in a planetary manner, and the steel balls uniformly grind and shape the silica sand particles under the action of centrifugal force and friction force, so that the silica sand particles are approximately spherical, the angular factor is improved, and the quality of the silica sand particles is improved. The surface smoothness is improved.

The utility model provides acrylic convex mirror forming equipment, which belongs to the technical field of acrylic convex mirror processing equipment and comprises a worktable, supporting rods are fixedly mounted at four corners of the top of the worktable, a top plate is fixedly mounted at the tops of the supporting rods, a lower die is fixedly mounted at the top of the worktable, and an upper die is arranged above the lower die. The adjusting mechanism is arranged at the top of the workbench; and the cleaning mechanism is arranged on the inner side of the adjusting mechanism and used for cleaning the surface of the lower mold. Through the arrangement of the cleaning mechanism, impurities and dirt on the surface of the lower die can be automatically cleared away, the influence of the pollutants on the surface of a formed convex mirror is effectively prevented, the surface smoothness and quality of the formed convex mirror are remarkably improved, the cleaning mechanism can be adjusted to the horizontal position according to needs through the design of the adjusting mechanism, and the working efficiency is improved. Therefore, the lower die is cleaned in all directions, and cleaning dead angles are prevented.

The application discloses a precision polishing processing device for brass rod production and a processing method thereof, and relates to the brass rod polishing technical field.The device comprises a polishing unit, a supporting unit and a rotary feeding unit.Three groups of clamping and polishing mechanisms are uniformly distributed in the circumference of the polishing unit, and the clamping and polishing rollers are synchronously changed in diameter and are embraced and centered by a deflection arm driven by a hydraulic driving assembly.The driving mechanism drives the polishing rollers to rotate by gear transmission through a gear ring.The rotary feeding unit clamps the workpiece and feeds it in the reverse direction, and the supporting unit adjusts the flexible supporting wheel through a reciprocating screw rod, and the rear end polishing is completed by relying on the outer ring polishing cotton.The three-point embracing clamping is adopted, the workpiece is uniformly stressed, and the brass rod is prevented from being deformed and bruised under pressure.The hydraulic pressure control and diameter adjustment do not need to replace the guide sleeve, and the production change is convenient.The workpiece and the polishing roller rotate in opposite directions to realize uniform grinding around the circumference, and the flexible polishing at the tail is matched, so that the processing precision and the surface quality are effectively improved, and the continuous polishing of the multi-specification small-batch brass rod is adapted.

The utility model provides an oil tank device for quenching treatment, which relates to the technical field of metal quenching and comprises an oil tank cylinder, a support frame, an electric lifting arm and a rotary stirring component. The oil groove cylinder is composed of a positioning cylinder, a movable cylinder and a spiral water cooling jacket, three-dimensional circulation flow of quenching oil is achieved through a rotary stirring assembly, and the problems that due to the fact that oil temperature distribution of a traditional quenching oil groove is not uniform, workpieces deform, oil liquid oxidation pollution is serious, and the cooling efficiency of large workpieces is low are solved. And in cooperation with a multi-stage gear transmission mechanism, the spiral stirring roller generates planetary motion in the vertical direction while horizontally rotating, and it is ensured that quenching oil forms a three-dimensional turbulent flow field. The spiral water-cooling jacket is matched with the circulating liquid pipe to realize constant-temperature control, the filter frame can quickly load and unload workpieces, and the electric lifting arm automatically finishes hoisting operation, so that the stability and the production efficiency of the quenching process are remarkably improved.

The application provides a device for reducing welding marks in an alumina ceramic crucible, which comprises a cylindrical outer mold with a hollow structure, an inner mold arranged on the inner side of the outer mold, a cylindrical closed forming cavity arranged between the inner mold and the outer mold, a base jointed to the bottom of the outer mold, two second grouting openings in a parallelogram shape and in opposite directions arranged in the middle of the base, a feeding disc connected to the lower part of the base, and a first grouting opening arranged in the center of the feeding disc. The application also provides a method for reducing welding marks in an alumina ceramic crucible, which comprises the following steps: assembling the outer mold, the inner mold, a mold core ring, the base and the feeding disc; placing the mold into water with a temperature of 24-26 DEG C; injecting alumina ceramic grouting liquid into the mold from the first grouting opening to form; and demolding. The application can reduce welding marks in an alumina ceramic crucible and improve the quality of finished products.

The utility model belongs to the field of alloy steel shot derusting and polishing, and particularly relates to an alloy steel shot derusting and polishing device which comprises a base, flexible supporting blocks are symmetrically and fixedly connected to the top face of the base, a left supporting plate is fixedly connected to the top face of one flexible supporting block, and a right supporting plate is fixedly connected to the top face of the other flexible supporting block. The top face of the other flexible supporting block is fixedly connected with a right supporting plate, and the back face of the left supporting plate is fixedly connected with a driving motor. Through the structural design that the inner wall of the treatment barrel is provided with the convex strips and the polishing layers which are annularly and alternately distributed, the driving motor drives the treatment barrel to rotate, and the vibration motor is elastically supported on the surface of the base through the spring to generate vibration, alloy steel shots violently collide with the convex strips under the dual effects of rotating centrifugal force and high-frequency vibration to strip a rust layer; and meanwhile, the grinding layers alternately distributed in the circumferential direction conduct continuous friction polishing on the surfaces of the steel shots, the rust removal efficiency and the surface smoothness are remarkably improved, and the problem that in the prior art, the efficiency is low due to single dependence on rotating impact is solved.

The application relates to a CMP composition for obtaining a high-quality SiC single crystal substrate surface, which is prepared from the following raw materials in percentage by weight: 20-50 wt% of polishing abrasive, 3-5 wt% of oxidizing agent, 0.1-0.5 wt% of surfactant, 0.2-0.5 wt% of hydrogen bond regulator, 0.2-1 wt% of polishing accelerator, 0.01-0.05 wt% of defoaming agent, and the balance of water; the CMP composition is neutral. The CMP composition uses silicon oxide as the abrasive, introduces the hydrogen bond regulator, the polishing accelerator and the oxidizing agent, improves the polishing rate of the silicon carbide wafer CMP, realizes that the surface roughness Ra of the silicon surface after cleaning can reach below 0.07 nm, the surface after cleaning is free of large particles (>0.2 um), meanwhile, the silicon oxide raw material does not need to be treated, has excellent long-term storage stability, and the system does not have the phenomena of particle agglomeration and sedimentation with the prolongation of the storage time, and excellent polishing surface quality can be obtained in the subsequent polishing process.

The invention relates to the technical field of hardware polishing, in particular to a multi-face matched precise hardware polishing device which comprises a mechanical arm, a connecting part is installed at the moving end of the mechanical arm, and the connecting part comprises a butt joint column and a shell rotationally arranged on the outer arc face of the butt joint column in a sleeving mode; the output end of the connecting part is in butt joint with an inclined part, and the inclined part comprises a universal joint and a transmission shaft fixedly connected with the bottom of the universal joint; the outer cambered surface of the transmission shaft is rotationally sleeved with a rotary disc, the bottom face of the rotary disc is provided with a plurality of rotationally-connected butt joint frames, the butt joint frames are rotationally connected with the elastic telescopic end of the elastic telescopic rod, and the grinding head can actively incline through an inclined part formed by a universal joint, so that the mechanical arm can grind the area which cannot be touched by a traditional rigid structure; and the application range of the mechanical arm polishing process is greatly expanded, and the problem of'machining dead angles' existing in the industry for a long time is solved.