950results about "Grinding devices" patented technology

The invention relates to the technical field of semiconductors, and discloses a preparation method of a heat-conducting polyurethane polishing pad, which comprises the following steps: coupling a silane coupling agent with a hydroxylated inorganic heat-conducting material, and carrying out condensation reaction on silanol groups in the silane coupling agent and hydroxyl groups in the hydroxylated inorganic heat-conducting material to form Si-O-Si covalent bonds; bridging a hydroxylated inorganic heat-conducting material at one end of a silane coupling agent to obtain an intermediate; the intermediate is an inorganic heat-conducting material modified by a silane coupling agent; mixing the polyurethane prepolymer with the intermediate to form a mixed prepolymer, and curing the mixed prepolymer at a first temperature to obtain heat-conducting polyurethane; or curing the polyurethane prepolymer to obtain polyurethane, carrying out melt blending on the polyurethane and the intermediate at a second temperature, and curing at a first temperature to obtain heat-conducting polyurethane, in the heat-conducting polyurethane, polyurethane is bridged at the other end of the silane coupling agent. Compared with the prior art, the heat transfer and heat conduction performance of the polishing pad is effectively improved.

The cBN resin superhard grinding wheel is prepared from the following raw materials in percentage by mass: 30 to 45 percent of cBN grinding material, 1 to 3 percent of nano yttrium oxide, 2 to 3 percent of nano zirconium oxide, 2 to 4 percent of coupling agent, 1 to 3 percent of silicon dioxide compound and the balance of phenolic resin. The phenolic resin matrix is jointly modified by the nano yttrium oxide, the nano zirconium oxide and the specific silicon dioxide compound, and the prepared grinding wheel has good wear resistance, hardness and temperature resistance.

The utility model discloses a wire pressing clamp and a wire pressing device.The wire pressing clamp comprises a wire pressing disc body used for being concentrically matched with a brush disc, a plurality of sliding grooves are evenly distributed in the periphery of the wire pressing disc body in the circumferential direction, and telescopic rods capable of stretching out and drawing back in the radial direction are arranged in the sliding grooves; the multiple telescopic rods can change the pressing and covering area of the wire pressing disc body through radial stretching and retracting; when the two wire pressing discs are vertically oppositely combined to the two sides of the brush disc to form the wire pressing device, the telescopic rods stretch out to press wires on the two sides of the brush disc, the situation that the wires are scattered due to accidental springback is avoided, it is guaranteed that the next strand splitting and fixing process can be stably carried out, and the grinding brush disc forming efficiency and quality are improved.

The invention relates to a photoetching ordered microcosmic fixed abrasive polishing pad and a preparation method thereof. Compared with the prior art, the method has the advantages that the to-be-photoetched surface of the substrate is photoetched according to the photoetched pattern, so that the plurality of microscopic grinding columns are orderly distributed and formed on the grinding material base according to the preset distribution and arrangement mode, the distribution shape, direction and position of the microscopic grinding columns on the grinding material base are kept unchanged, and regular distribution and uniform distribution can be presented; the distribution and the size of the micro grinding columns can be adjusted according to the photoetching pattern to meet different polishing requirements, then the micro grinding columns of the substrate are compositely filled with the filling body to keep the stability of the micro grinding columns, and the polishing pad can be suitable for the micro level to meet the requirement of the manufacturing procedure below 5nm, so that the production efficiency is improved, and the production cost is reduced. The microcosmic grinding columns are formed through photoetching to replace traditional grinding particles, the chemical stability of the polishing pad during polishing is improved, the removal rate is increased, the surface roughness is reduced, and the polishing effect of the polishing pad on a polishing product is improved.

According to the conductive gel grinding tool provided by the invention, the foamy copper framework is added on the basis of a conventional gel resin grinding tool, and the conductive gel grinding tool is prepared according to specific steps, so that the grinding tool has conductivity; during polishing, the conductive gel grinding tool is connected with the negative electrode of a power source to serve as a cathode, polishing liquid is matched, and an electrolytic reaction can occur in a polishing area on the surface of the grinding tool. Correspondingly, the invention further provides an electro-Fenton catalysis auxiliary polishing method. According to the method, electro-Fenton catalytic auxiliary polishing of the hard and brittle materials is achieved through the conductive gel grinding tool with the specific structure, the polishing efficiency is high, little iron-containing sludge is generated, and environmental pollution is small; generation of hydroxyl free radicals in a polishing solution in a machining area is controlled through the electro-Fenton effect, oxidation of the surface of a workpiece is achieved, then an oxidation layer on the surface of the workpiece is mechanically removed through a conductive gel grinding tool, the workpiece and the grinding tool do not need to be soaked in an electrolytic solution for polishing, the electro-Fenton auxiliary polishing device and the operation process are simplified, and the practical value is high.

The invention provides a composite abrasive part, application, a preparation method and a processing machine tool, the composite abrasive part can be used for inner hole processing and grinding wheel processing, and the composite abrasive part is formed by mixing and pressing multi-granularity composite abrasive particles and a metal-resin binding agent. According to the multi-granularity composite abrasive particles, small-granularity particles are used for filling gaps among large-granularity particles, so that the number of effective abrasive particles participating in material removal on the surface of an abrasive layer is increased, the material removal depth of a single abrasive particle is reduced, and the surface roughness is improved; the composite grinding material piece comprises a rigidity grinding and polishing composite section, and the rigidity grinding and polishing composite section comprises rigidity grinding areas and flexible polishing areas which are sequentially and alternately combined in the axial direction or the circumferential direction of the composite grinding material piece, so that the material removal process is discretized, the possibility of generating machining cracks is reduced, and efficient mirror surface machining is achieved.

The present application relates to a modified diamond micro-powder and a preparation method and application thereof. The preparation method of the modified diamond micro-powder comprises the following steps: performing hydroxylation treatment on diamond micro-powder to obtain surface hydroxylated diamond micro-powder; performing pretreatment on the surface hydroxylated diamond micro-powder in a mixed solution of a silane coupling agent and an organic solvent under ultrasonic conditions with a frequency of 25KHz-40KHz and an intensity of 1W / cm 2 -3W / cm 2 to obtain pretreated diamond micro-powder; and performing vacuum heat treatment on the pretreated diamond micro-powder to obtain modified diamond micro-powder. The preparation method greatly improves the bonding force between the modified layer and the diamond and improves the micro-powder agglomeration, so that the pretreatment link before chemical plating has the feasibility of batch processing, which not only doubles the production efficiency, but also reduces the production cost to one third of the traditional method.

The invention discloses a manufacturing method of a grinding wheel for a high-uniformity and easy-to-sharpen grinding single crystal diamond cutter, and belongs to the field of superhard materials and products in machining, the manufacturing method mainly comprises the steps of wet mixing, tape casting, laser cutting, lamination, matrix surface treatment, integrated sintering, size processing, sharpening and the like, and finally the grinding wheel with the total thickness of an abrasive layer being 7-15 mm is formed. The grinding wheel layer is formed by intersecting and laminating a piece a and a piece b, the height of diamonds at the junction of the piece a and the piece b tends to be consistent, the diamond exposure height and smoothness are better compared with direct feeding sintering, meanwhile, the piece a can be designed to be of a porous structure through proper binder selection, and therefore the dressing efficiency is further improved, and the dressing effect is better. And higher processing quality and efficiency of the diamond cutter are indirectly improved.

The invention relates to a high-hydrophilicity CMP hard polishing pad, a preparation method and application thereof, the polishing pad comprises a polishing layer, a fitting layer and a buffer layer, the polishing layer is formed by mixing and pouring a component A and a component B, the component A comprises polyisocyanate, polyol, a foaming agent and a hydrophilic modifier, and the component B is an amine curing agent. The carboxylate is added into the polishing layer to serve as a hydrophilic modifier, and after dissociation, the carboxylate is combined with polar groups in a polyurethane molecular chain through coordinate bonds or ionic bonds to form a stable bonding structure, so that the carboxylate is attached to a main chain of the polyurethane molecular chain, and the overall hydrophilicity of the polyurethane structure is improved. According to the method, the surface energy and surface characteristics of the polishing pad can be changed fundamentally, the introduced hydrophilic auxiliary agent cannot reduce the mechanical property of an original formula, and the constant hydrophilicity is maintained during the polishing service life of the polishing pad.

This application relates to a fixed abrasive having a low wettability bond material. An abrasive article includes a fixed abrasive body having a specific MOR / EMOD ratio associated with a specific bond volume percentage. The body also has a micron 2 Average bond post area (BPA) of: b) 1536 mm 2 c) an average bond post count (BPC) of at least 140 per micron; or d) an average bond wetting radius of at least 30 per micron; or d) a combination of a) and b).

The present invention relates to diamond abrasive grains and a manufacturing method thereof, and provides tetradecahedral diamond abrasive grains with uniform size and shape. The manufacturing method of diamond abrasive grains according to the present invention allows for shape control and minimizes impurities and crystal defects, thereby manufacturing diamond abrasive grains for ultra-precision grinding in chemical mechanical planarization (CMP) processes.

The invention discloses a double-layer foaming porous polishing pad as well as a preparation method and application thereof, and relates to a double-layer pore structure chemical mechanical polishing pad, the upper part of a polishing layer of the polishing pad is provided with closely distributed finger-shaped pores, the average inner diameter is 0.17-0.25 mm, and the pore wall thickness of the finger-shaped pores is 15-20 microns; the lower part of the polishing layer is a sponge hole layer, and the average inner diameter of the sponge hole layer is 5-10 microns; the main body structure of the polishing layer is prepared from coating slurry comprising polyurethane resin, polyvinyl chloride resin and ethyl acetate in a coagulating bath through a non-solvent phase inversion method. The rebound rate of the polishing pad can be effectively improved by controlling the relative thickness of the double-layer holes of the polishing layer, the abrasion resistance of the polishing pad is remarkably improved through resin blending, the service life is prolonged, meanwhile, the hardness of the polishing layer is moderate, and product defects are effectively reduced. The polishing pad has excellent wear resistance and moderate hardness, the service life is remarkably prolonged, particle defects in the polishing process are reduced, and the polishing pad is suitable for a high-precision polishing process.

The utility model discloses a beveled flap disc forming device which comprises a base, a supporting frame is fixed to one side of the upper end of the base, and a positioning seat and a rotation driving assembly used for driving the positioning seat to rotate horizontally are movably installed at the bottom of one end of a straight section of the supporting frame. A guide rod and a telescopic electric cylinder I for driving the guide rod to transversely move are transversely mounted at the lower part of the positioning seat in a sliding manner; a second telescopic electric cylinder is controlled through a PLC H, the horizontal height of a flap disc is adjusted so that the edge of the flap disc can be matched with a milling tool, a second servo motor is controlled to adjust the grinding angle of a grinding machine and the grinding tool, and a first telescopic electric cylinder is controlled to adjust the distance between the milling tool and the edge of the flap disc under the cooperation of a guide rod and the like. And the servo motor I is synchronously started, the started coping machine can rotate at a constant speed in the radial direction of the sand page disc, and the edge part of the sand page disc is quickly ground and trimmed by utilizing the highly rotating milling cutter, so that the machining efficiency and the coping effect are effectively improved.

The utility model discloses a grinding material and grinding tool machining clamping device, and relates to the field of machining clamping devices, the grinding material and grinding tool machining clamping device comprises a workbench, the upper surface of the workbench is fixedly connected with a plurality of first arc plates, the upper surface of the workbench is provided with a pair of first through holes and a pair of second through holes, the surface of the workbench is fixedly connected with a plurality of protection pads, and the first arc plates are fixedly connected with the protection pads. A plurality of slag discharging holes are formed in the surface of the workbench, and a plurality of abrasive grinding tools are placed above the workbench. The first racks are higher than the second racks, dislocation avoiding is achieved, the gear column drives the pair of first racks to be far away from each other and drives the pair of second racks to be far away from each other, the pair of first racks drive the pair of first push-pull plates to be far away from each other, and the pair of second racks drive the pair of second push-pull plates to be far away from each other. And then the multiple second arc plates are driven to be close to the first arc plate, multiple abrasive grinding tools can be synchronously clamped, and the drilling efficiency is improved.

The invention relates to the technical field of cutting tools, and particularly discloses a cutting disc and a manufacturing method thereof, and the cutting disc comprises the following raw materials: liquid resin, a curing agent, reinforced fibers, an abrasive material and a filler. The reinforced fiber is one or a combination of more of glass fiber, carbon fiber and the like; the grinding material is one or a combination of more of white corundum, diamond and the like; the filler is one or a combination of more of molybdenum disulfide, copper powder and the like; the liquid resin can be a combination of epoxy resin E-44 and the like or a combination of unsaturated polyester and the like; the curing agent is selected from combination of dicyandiamide and the like or MEKP and the like according to the type of the liquid resin. The manufacturing method comprises the following steps: uniformly mixing the raw materials, carrying out hot press molding, carrying out secondary hardening, and finally thinning the hardened product to the thickness of 0.1-0.35 mm. The cutting blade is high in strength, good in wear resistance, controllable in thickness and capable of meeting the cutting requirements of different industries.

The application belongs to the technical field of novel abrasive tool manufacturing, and discloses a novel carbon nanotube alpha-Fe2O3 grinding wheel and a manufacturing method thereof. After carbon nanotubes are dispersed in deionized water and iron-based binder powder is added, heating and ball milling are performed to obtain uniform powder of the carbon nanotubes and the iron-based binder. An SLM3D printer is improved by adding a powder laying mechanism and a pill mold. The powder is placed in the improved SLM3D printer to prepare carbon nanotube iron-based binder pills, and an aluminum alloy turning is used to prepare a grinding wheel base. The carbon nanotube iron-based binder pills are inlaid on the grinding wheel base to prepare the novel carbon nanotube alpha-Fe2O3 grinding wheel. The application adds an appropriate amount of carbon nanotubes to form a new formula in the grinding wheel, and uses the SLA3D printing technology and a vertical arrangement method to manufacture the novel carbon nanotube alpha-Fe2O3 grinding wheel. The grinding wheel does not contain abrasive grains, and an oxide film is generated on the surface of the grinding wheel during ELID dressing, thereby improving the polishing performance of the grinding wheel.

The invention discloses a preparation method of an abrasive tool, and belongs to the technical field of abrasive tools, and the preparation method comprises the following steps: S1, arranging abrasive particles on a forming surface of a mold at fixed points according to preset arrangement points; s2, a glue layer is arranged on the working face of the base body, the working face of the base body is pressed on the forming face of the mold, and the abrasive particles make contact with the working face of the base body and are bonded to the working face of the base body; s3, after pressing is completed, the base body and the mold are separated, and curing treatment is conducted on the glue layer of the base body; and S4, metallurgical bonding is conducted on the base body and the abrasive particles, and a finished abrasive tool is obtained. The abrasive particles are positioned on the mold firstly, then the mold is pressed by the base body provided with the glue layer, and after pressing is completed, the base body and the mold are separated and are not solidified on the base body together, so that the mold is not consumed while ordered arrangement of the abrasive is achieved, the time for removing the mold in the later period is omitted, and the arrangement efficiency is improved.

This invention discloses a water-grinding edge wheel and its preparation method. The preparation method includes the following steps: (1) Batching: Weigh and prepare the corresponding metal powder according to the metal cutter head formula of the water-grinding edge wheel; (2) Loading: Pour the metal powder into a pre-assembled graphite mold; wherein, by improving the structure of the graphite mold, the metal cutter head is radially pressed and formed in the mold hot pressing process; (3) Radial hot pressing of the cutter head: Radial hot pressing and sintering is performed according to the preset process parameters, so that the metal powder forms an alloy cutter head, and the longitudinal horizontal height of each alloy cutter head is consistent; (4) Welding: Disassemble the graphite mold, take out the cutter head, and weld the metal cutter head to the substrate to obtain the finished water-grinding edge wheel. This edge wheel preparation method ensures that each metal cutter head has the same horizontal height, reduces the consumption of grinding wheels in the grinding / sharpening process, greatly reduces costs, and at the same time, increases the service life of the edge wheel by more than 2 times.

An abrasive article with a bonded abrasive body having a ratio of diameter to thickness of at least 10:1. The abrasive article can include secondary abrasive particles contained in a bond material, wherein the secondary abrasive particles include agglomerated primary abrasive particles.

A system for forming an abrasive article is presented. The system includes a workspace and an abrasive material dispenser that deposits a layer of abrasive material onto the workspace. The system also includes a leveler that levels a surface of abrasive material on the workspace. The system also includes a binder jet printer that dispenses a liquid binder onto the layer of abrasive material. The workspace is on a moving surface that moves the workspace between a dispensing position under the dispenser, a leveling position under the leveler, and a printing position, under the printer.

An environment-friendly polishing disc is manufactured by a processing technology that includes: preparing a table, drying oven, cutting tools, upper and lower molds, polishing powder, a batching barrel, and a polyurethane synthetic resin comprising HC8968 and HC8552; cutting a polyester-fiber upper backsheet and a lower backsheet to match the mold profile; batching the polishing powder with the polyurethane resin and uniformly mixing with a vibrator; pouring the mixture into the lower mold over the lower backsheet, scraping the surface, overlaying the upper backsheet, and clamping with the upper mold; sequentially drying the clamped assembly at about 45° C. for about 230 min, about 92° C. for about 230 min, and about 60° C. for about 450 min; and removing the molds to form the disc. An optional central notch may be provided. The process reduces external polishing consumables and supports uniform soft-layer formation.

1. A chemical mechanical polishing pad comprising: a polishing portion including a polymer body; a plurality of polymer particles embedded within a body of the polymer body, at least a portion of the plurality of polymer particles being at least partially exposed at a surface of the polymer body; and a plurality of pores in a surface of the polymer body.

The utility model provides a centering device for grinding head production, relates to the technical field of grinding head production, and solves the problems that a grinding head rod can not be accurately inserted into a grinding head when the existing ceramic grinding head is produced, and the subsequent processing and the product quality are influenced. The grinding head clamp is arranged on a grinding head rotary table and used for clamping a grinding head body, the L-shaped motor frame is arranged on one side of the grinding head rotary table, a centering motor is installed on the motor frame, and the output end of the centering motor is fixedly connected with one end of an air cylinder seat. A pneumatic clamping jaw assembly used for clamping a grinding head rod is installed at the other end of the air cylinder base and comprises a first centering clamping jaw and a second centering clamping jaw. The tool has the advantages that the inserted grinding head rod can be centered in the grinding head rod groove of the grinding head, the installation accuracy of the grinding head rod is guaranteed, the product quality is improved, and the tool is simple in structure and easy to achieve.

The utility model provides a feeding device for grinding head production, relates to the technical field of grinding head production, and solves the problems that during production of existing ceramic grinding heads, the feeding process is uncertain, feeding is not in place easily, and follow-up machining is affected. The device comprises a discharging pipeline, a grinding head translation assembly arranged on one side of a discharging port of the discharging pipeline and used for driving a grinding head to translate to a grinding head clamp of a follow-up process, and a grinding head limiting assembly arranged above the discharging port of the discharging pipeline and used for pressing the follow-up grinding head. And the grinding head pushing assembly is arranged on one side of the grinding head limiting assembly and used for pushing the grinding head on the grinding head translation assembly into the grinding head clamp. The grinding head feeding device has the advantages of being capable of achieving feeding of grinding heads in order, stable in feeding, good in effect, high in efficiency, simple in overall structure, easy to achieve and low in cost.

An eco-friendly abrasive article includes a substrate and an abrasive layer. The abrasive layer can include abrasive particles and a binder. The binder can include an eco-friendly solvent comprising d-limonene; l-limonene; racemic limone; dipentene; methyl dodecanoate; methyl octanoate; 1,3 propanediol; ethyl lactate; ethyl levulinate; levulinate propanediol ketal; isopropylidene glycol; butyl levulinate; propylene carbonate; or a combination thereof.

The subject application relates to bonded abrasive with low wetting bond material. An abrasive article including a bonded abrasive body having a particular MOR / EMOD ratio associated with a particular bond vol %. The body also can include a) an average Bond Post Area (BPA) of not greater than microns2; b) an average Bond Post Count (BPC) of at least 140 per 1536 mm2; c) an average bond wetting radius of at least 30 / microns; or d) a combination of a) and b).

This invention provides a method for manufacturing a superhard abrasive hardness-adaptive grinding wheel, comprising the following steps: Step 1: Prepare 65 parts of MoS2 nanoparticles and 35 parts of hydroxyguanidine gum solution, then thoroughly mix the MoS2 nanoparticles and hydroxyguanidine gum solution to prepare a mixture; Step 2: Add the mixture prepared in Step 1 to a spraying machine; The mixture then flows from the inside of the grinding wheel through an internal channel to the surface of the grinding wheel. The hydroxyguanidine gum solution, carrying MoS2 nanoparticles, is atomized and broken into small droplets twice during spraying. These layers curl and accumulate to form a garnet-like corrugated structure, giving MoS2 a certain degree of brittleness and ductility. Due to the low thermal conductivity of MoS2 nanoparticles, the heat transfer performance of the lubricant can be improved. Simultaneously, the hydroxyguanidine gum solution restores viscoelasticity, adsorbing the grinding debris generated between the abrasive grains and then carrying it away from the grinding wheel through centrifugal force, improving the surface morphology of the grinding wheel and increasing the grinding efficiency.

This invention pertains to machining tools, specifically relating to a metal grinding wheel for drilling silicon carbide ceramics and its preparation method. Copper powder, tin powder, nano-titanium powder, diamond, and resin are ball-milled and then mixed with copper-tin alloy powder and resin to obtain a powder. This powder is then cold-pressed and sintered to obtain a metal grinding wheel for drilling silicon carbide ceramics. Previously, sintered metal grinding wheels used for processing ceramics such as zirconia and alumina could not meet the requirements for lifespan and quality when dealing with the harder and more brittle silicon carbide ceramics. This invention utilizes nano-titanium powder to achieve strong holding force and easy sintering, while adding a copper-tin alloy to improve the toughness of the binder, enhance the self-sharpening property of the product, increase cutting force, and ensure product quality and lifespan.

The invention relates to the technical field of grinding wheels, in particular to a copper-titanium-based aluminum oxide grinding wheel and a preparation method and application thereof. The preparation method comprises the following steps: mixing the aluminum oxide grinding material, the metal binding agent and the auxiliary binding agent to obtain a mixture; carrying out cold press molding on the mixture to obtain a green body; and sintering the green body to obtain the copper-titanium-based aluminum oxide grinding wheel. The metal binding agent comprises Cu powder, Ti powder, Nd powder and Y powder according to the mass ratio of (58-80): (20-40): (1-4): (1-4). The aluminum oxide grinding material reacts with titanium atoms in the metal binding agent to generate a titanium oxide compound and a copper-aluminum oxide compound, the holding effect of the metal matrix on aluminum oxide can be improved, the self-sharpening performance of the grinding wheel is improved, and the grinding efficiency of the grinding wheel is improved. And the Nd powder and the Y powder can effectively reduce the residual stress during sintering, inhibit hot cracks at the interface of the matrix and the aluminum oxide, and also can be used as a second phase to improve the strength of the copper-titanium matrix and improve the wear resistance of the aluminum oxide grinding wheel.