40results about How to "Strong grinding force" patented technology

The invention provides a resin grinding wheel and a manufacturing method thereof, which belong to the field of grinding tools and are used for solving the problem of the production of harmful sulfur dioxide by pyrite serving as a lubricating agent existing in the conventional resin grinding wheel. The resin grinding wheel comprises a grinding body and a reinforcing sheet which is arranged inside the grinding body for enhancing the revolving strength of the grinding body, wherein 90-105 parts by mass of corundum is taken as a grinding material the grinding body; 2-8 parts by mass of phenolic aldehyde resin liquid and 6-25 parts by mass of phenolic aldehyde resin powder are taken as bonding agents; and 1-10 parts by mass of cryolite and 1-5 parts by mass of polytetrafluoroethylene powder are taken as fillers. The invention further provides a manufacturing method of the resin grinding wheel. In the grinding wheel, the polytetrafluoroethylene powder instead of pyrite is taken as a lubricating agent, so that sulfur dioxide is not produced and other pollution is avoided in the using process.

The invention provides a compound polishing powder of a polishing optical element, a preparation method and a polishing process, belonging to expendable material used for polishing the optical element, the preparation method and the polishing process of the polishing powder; wherein, the polishing powder comprises 0.5-3 of Cr2O3 powder and 1 of Al2O3 according to the weight proportion; the granularity of the Cr2O3 powder is ranging from 0.05 microns to 0.10 microns and the granularity of the Al2O3 powder is ranging from 0.05 microns and 0.10 microns; the polishing process comprises the steps as follows: 1) installing polishing formworks for the optical element; 2) filling the polishing powder; 3) arranging a lens disc; 4) fixing the lens disc; 5) rubbing and polishing. The polishing formwork comprises 500 of polishing asphalt and 20-200 of Al2O3 according to the weight parts; in the polishing process, the polishing powder and the polishing formwork can be used for polishing the optical element which is made of zinc selenide, with the surface smoothness of more than 20-10.

The invention relates to a grinding tool. The powerful grinding sand disk is characterized by comprising a substrate, a reinforcing ring and a grinding work layer; the middle of the substrate is provided with a through hole; the reinforcing ring is fixed on the through hole of the substrate; the front side of the substrate is provided with the annular grinding work layer; the reinforcing ring is positioned on the inner side of the grinding work layer; and the material of the substrate comprises glass fibre or polyester cotton. The powerful grinding sand disk has the characteristics of high strength, good water resistance and weather fastness, low production cost and strong grinding force and is simple to manufacture.

The invention discloses special zirconium-aluminium composite ground micro-powder for the optoelectronic industry and a production method for the same. The special zirconium-aluminium composite ground micro-powder for optoelectronic industry is produced from two main raw materials, namely, fused alumina and zirconium silicate, via ball-milling, water-washing, grading, compounding, surface coating, filtering, spray-drying and sieving, wherein the compounding ratios of the contents of the raw materials are as follows: the content of alumina particles is 30-50%, and the content of zirconium silicate particles is 70-50%. The product disclosed by the invention is reasonable in particle shape collocation, wide in particle size distribution, stable in median diameter, high in basic particle size ratio, without large particles and ultrafine particles, excellent in interparticle lubrication property, and especially suitable for grinding and polishing high-tech products in the optoelectronic industry.

The invention discloses a method for preparing a resin grinding wheel. The method comprises the following steps: (1) placing 70-85 parts by weight of white corundum into 10-15 parts by weight of acrylic emulsion to be soaked, evenly mixing 6-8 parts by weight of polytetrafluoroethylene powder, 1-2 parts by weight of boron nitride, 15-20 parts by weight of cryolite and 30-35 parts by weight of phenolic resin powder with the soaked white corundum, and enabling the mixture to pass through 20-25-mesh standard screens to obtain a grinding wheel mixture; (2) taking a glass fiber cloth, coating the two faces of the glass fiber cloth with phenolic resin, then placing the glass fiber cloth into a drying oven, and baking the glass fiber cloth at the temperature of 135-140 DEG C for 15-20min to obtain glass fiber pieces; (3) placing the glass fiber mixture into a forming mold, spreading the glass fiber mixture, completely embedding the glass fiber pieces into the grinding wheel mixture, and conducting compression forming to obtain a grinding wheel green body; (4) placing the grinding wheel green body into a sintering furnace to be sintered; (5) machining the sintered grinding wheel green body on a lathe and a grinding machine to obtain the finished resin grinding wheel. When resin grinding wheel prepared by the method is used, harmful gas caused by oxidation can not emit.

The present invention relates to one kind of abrasive cloth disc for machining metal workpiece, and the abrasive cloth disc consists of one basal body and one abrasive cloth layer. The abrasive cloth layer is adhered by means of adhesive onto the basal body, and the basal body is one integral punched metal member of 0.2-2.0 mm thick sheet and with one central installation hole. The present invention has environment friendship, high integral strength and low cost.

The invention discloses a diamond grinding fluid. The diamond grinding fluid comprises the following components in parts by mass: 2-10 parts of a grinding material, 1-3 parts of a surfactant, 0.5-2 parts of a suspending agent, 0.1-1 part of a wetting agent, 0-8 parts of a pH value regulator, 1-10 parts of a viscosity regulator and 60-90 parts of matrix oil, wherein the grinding material is a mixture of polycrystalline diamond micro-powder, polycrystalline-like diamond micro-powder and monocrystal diamond micro-powder; the grinding material is subjected to surface modification treatment by adopting alkylphenol polyoxyethylene ether in advance; and the suspending agent is at least one selected from the group consisting of N-methyl pyrrolidone, modified polyurea, methyl pyrrolidine and castor oil derivatives. The diamond grinding fluid is high in grinding efficiency, uniform in grinding material dispersion, good in suspension stability and free of sedimentation and layering after being placed for a long time.

The present invention relates to method of preparing a monocrystalline diamond abrasive grain comprising the steps of: sufficiently dispersing a micron-scale monocrystalline diamond and at least a micron-scale metal powder in a sol containing at least a nano-scale metal powder, and controlling the suitable ratio of the two kinds of metal powder with different order of magnitude of particle size, accordingly the micron-scale metal powder can be stuffed into voids among the monocrystalline diamond grains, and only a suitable amount of nano-scale metal powder is required to let the micron-scale metal powder and nano-scale metal powder coat together on the surface of the micron-scale diamond to form an integral and uniform coating layer including at least two kinds of metal grains, thus the resulting monocrystalline diamond abrasive grains have a unique rough-surface morphology, a plurality of contact points and contact surfaces resenting in the grinding process and good self-sharpening.

The invention discloses a composite binder grinding wheel for machining a large-size silicon carbide substrate and a preparation method of the composite binder grinding wheel, and particularly relates to a formula and a preparation method of a composite binder superhard-material grinding wheel for machining a silicon carbide semiconductor material. The formula mainly comprises the following components of 25%-45% of diamond abrasives, 25%-40% of pre-alloyed powder, 8%-20% of polyphenylene sulfide, 10%-18% of zinc oxide whiskers and 8%-22% of SG abrasives. According to the preparation method, the polyphenylene sulfide and zinc-copper alloy powder are adopted as a composite binder system, and the binder system is high in abrasive holding force, resists high grinding resistance of large-size silicon carbide and is high in grinding force. The grain structure of an alloy system is refined through iron, aluminum and the like, brittleness is increased, and grinding sharpness of the grinding wheel is improved. Meanwhile, the isotropy of the microstructure of a grinding wheel layer can be improved through utilization of the whiskers and the like, a good homogeneous state is obtained, and the grinding stability problem of the silicon carbide substrate is solved. The machining problem of the large-size silicon carbide substrate is thoroughly solved.

The invention provides a water-milling environmental-friendly polishing wheel. The polishing wheel comprises, by weight, 30-40 parts of polyether polyol, 10-20 parts of polyester polyol, 20-60 parts of isocyanate, 0.01-0.05 part of catalyst, 1-5 parts of chain extender, 0.1-1.0 part of foaming agent, 100-300 parts of abrasive material, and 5-15 parts of filler. The hardness range of the water-milling environmental-friendly polishing wheel is 92-98A (Shore hardness), compared with a rubber polishing wheel, the water-milling environmental-friendly polishing wheel has the hardness advantage (high hardness, strong grinding force and high grinding efficiency), and compared with a resin grinding wheel and a magnesia grinding wheel, the water-milling environmental-friendly polishing wheel is high in glossiness and good in structural toughness, and workpieces needing to be polished are not easy to be damaged. Therefore, the water-milling polishing wheel can achieve the effects that the surface of the workpiece has good glossiness and beautiful surface texture modification through one-time polishing treatment.

The invention provides a large-bevel-edge 2.5 D cover plate machining device and method, and relates to the field of glass machining and manufacturing, the large-bevel-edge 2.5 D cover plate machining device comprises a cover plate fixing mechanism, a first grinding wheel rod and a second grinding wheel rod, the first grinding wheel rod is provided with a first cutting edge face, and the first cutting edge face is a first conical face with the large upper portion and the small lower portion; the second grinding wheel rod is provided with a second cutting edge surface and a third cutting edge surface which are consistent in shape, the second cutting edge surface comprises a second conical surface, a third conical surface, a fourth conical surface, a cylindrical surface and a fifth conical surface which are sequentially connected from top to bottom, and the roughness of the first cutting edge surface, the second cutting edge surface and the third cutting edge surface is sequentially reduced. A large bevel edge is machined at a time through the first cutting edge face, a contour is formed at the upper position and the lower position of the large bevel edge at a time through the second cutting edge face, and finally the contour of a rough product is finely trimmed through the third cutting edge face, so that the cover plate is obtained through complete forming, and beveling trimming is not needed. The processing yield and the processing efficiency are higher, and the standard reaching rate of the product size and the processing precision are improved.