458results about How to "Good self-sharpening" patented technology

The invention belongs to the field of diamond wheels and particularly relates to a metal ceramic combination binding agent and a combination binding agent diamond wheel. The metal ceramic combination binding agent is composed of, by weight, 60%-80% of 663 bronze powder and 20%-40% of ceramic powder. The ceramic powder is homemade and composed of, by weight, 45%-60% of silicon dioxide, 20%-30% of boric oxide, 10%-15% of potassium oxide, 5%-10% of magnesium oxide and 2%-5% of calcium oxide. The combination binding agent diamond wheel is composed of, by volume, 25%-40%of diamond abrasive, 55%-75% of combination binding agent and 2%-3% of pore forming agent. When the diamond wheel made of the metal ceramic combination binding agent is applied to a five-axis cnc machine tool, the good sharpness and the good self-sharpening performance of a ceramic binding agent are kept and the advantages of high rigidity and the good shape-maintaining performance of a metal binding agene are obtained. The comprehensive processing efficiency is improved by 100% to 150%.

The invention relates to a resin rough grinding wheel and a preparation method thereof. The resin rough grinding wheel comprises a grinding body and reinforcing meshes, wherein the reinforcing meshes are arranged inside the grinding body to enhance the revolving strength of the grinding body. The grinding body is composed of 115-150 parts of grinding materials, 5-15 parts of liquid phenolic resin, 25-45 parts of phenolic resin powder and 15-35 parts of filling, wherein the grinding materials comprise 30-40 parts of microcrystal corundum, 80-100 parts of fused alumina zirconia and 5-10 parts of garnets, the filling is composed of 9-21 parts of pyrite, 1-3 parts of cryolite, 1-3 parts of ferric oxide, 1-3 parts of quick lime and 3-5 parts of fluorite. The resin rough grinding wheel is prepared through the steps of preparation, mixing, sifting, shaping, hardening, testing, packaging and storing, has high strength, good abrasive resistance and self-sharpening performance, high grinding efficiency, good roughness and low workpiece burning possibility; meanwhile, the surface of the grinding wheel is not easy to block and has good breathability, good tenacity and high security performance.

The invention discloses a novel ceramic corundum grinding tool of a low-temperature and high-strength ceramic bonding agent. The grinding tool consists of the following components in percentage by mass: 15 to 20 percent of ceramic bonding agent, 80 to 85 percent of novel ceramic corundum grinding material and 5 percent of bonding wetting agent, wherein the bonding agent consists of the following components in percentage by mass: 10 to 30 percent of clay, 10 to 30 percent of feldspar, 45 to 70 percent of borosilicate glass, 0 to 15 percent of kryocide, 0 to 5 percent of quartz and 0 to 5 percent of magnesium oxide. The novel ceramic corundum grinding tool can be sintered at the sintering temperature of 850 to 980 DEG C, and by the grinding tool, a grinding wheel can be safely used at the rotation speed of 80 to 100m/s. The single-travel feeding amount of the grinding tool can be over 0.3mm, the metal removing rate is over 3 times that of an ordinary corundum grinding wheel, the grinding interval time is 3 to 5 times that of the ordinary corundum grinding wheel, the service life is 5 to 10 times that of the ordinary corundum grinding tool, and the novel ceramic corundum grinding tool is superior to a super-hard grinding tool and the ordinary grinding tool in performance and price.

The invention provides a resin abrasive cutting wheel and a manufacturing method thereof, belonging to the field of grinding tools. The resin abrasive cutting wheel solves the problem that the traditional brown corundum resin grinding wheel has low cost but bad cutting performance. The resin abrasive cutting wheel comprises a grinding body and a reinforcing sheet which is arranged inside the grinding body to reinforce the rotation strength of the grinding body, wherein the grinding body comprises the following raw materials in proportions by weight: 62-70% of brown corundum, 4-10% of black silicon carbide, 18-20% of phenolic resin and the balance of packing. The invention also provides a manufacturing method of the resin abrasive cutting wheel. According to the manufacturing method, the cutting performance of the abrasive cutting wheel is increased by increasing a special proportion of black silicon carbide under the condition that the cost is not increased.

The invention discloses a cubic boron nitride grinding wheel with low-temperature and high-strength microcrystalline glass ceramic binder. The cubic boron nitride grinding wheel consists of a matrix, a binding course and a grinding wheel block. The grinding wheel block is a cubic boron nitride grinding wheel block, and adopts the following raw materials (according to the weight percentage of the content): 45 to 80 percent of cubic boron nitride abrasive, 0 to 20 percent of corundum, and 20 to 35 percent of ceramic binder; the ceramic binder is the microcrystalline glass ceramic binder, and the raw material composition and the weight percentage content is as follows: 40 to 70 percent of SiO2, 5 to 25 percent of B2O3, 2 to 5 percent of Al2O3, 2 to 15 percent of Na2O, 2 to 5 percent of K2O, 2 to 4 percent of MgO, 2 to 4 percent of CaO, 1 to10 percent of Li2O, 2 to 5 percent of ZrO2 and 2 to 5 percent of Sb2O3. The invention provides a high efficiency grinding tool which has the advantages that the using linear speed of the grinding wheel can be 160 m/s, the process precision is high, the service life is long, the environment pollution is avoided, and the high efficiency grinding tool can be matched with a high speed high efficiency numerical control crankshaft grinder and is mainly used in the grinding machining of car crank shafts and various numerical control.

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 discloses a novel metal-ceramic bond diamond grinding wheel having the high strength and form-holding property in metal bond grinding wheels and the high self-sharpening property in ceramic bond grinding wheels, and a production method thereof. The metal-ceramic bond diamond grinding wheel is produced by: 1, preparing powder mixture out of 60-70% of copper-plated diamond powder, 15-20% of (W, Ti)C powder, 5-10% of tin powder, and 5-15% of iron group powders; mixing according to the above components and ratio to obtain the powder mixture; 2, forming, namely pressing the powder mixture into blanks by pressure forming; 3, sintering, namely subjecting the blanks to inert atmosphere low-pressure sintering, heating the blanks to 850-1050DEG C during sintering, and holding the temperature for 10-30 minutes. The copper-plated diamond powder is composed of particles with average particle size of 5-80 micrometers, and the particles are composed of diamond cores and copper coatings covering the diamond cores. Inert atmosphere during sintering is 5-10Mpa.

The invention provides a preparation method of a porous metal binding agent braze welding diamond grinding wheel, comprising the following steps of preparing a grinding wheel segment block and connecting the grinding wheel segment block with a grinding wheel base body. The prepared porous metal binding agent braze welding diamond grinding wheel has 45-70 percent of porosity, and the bending strength of three points of the grinding wheel segment block is 75-200 MPa. Because of the introduction of a pore structure, the trimming and sharpening ability, the grinding material exposure ability and a chips-containing space of the novel grinding wheel are greatly improved compared with the compact metal binding agent grinding wheel, the grinding wheel has favorable self-sharpening property, favorable durability and high processing efficiency, and can bear heavier load when crisp and hard materials are grinded; meanwhile, the grinding wheel segment block has high strength, the metal binding agent has favorable holding force on the grinding material, and the grinding material does not fall off easily and prematurely.

The invention discloses a mixed ultra-hard abrasive honing stone. The mixed ultra-hard abrasive honing stone is characterized by comprising the following components in percentage by weight: 20-40 percent of copper, 2-6 percent of silver, 1-10 percent of aluminum, 2-6 percent of zinc, 2-20 percent of tin, 10-20 percent of iron, 5-10 percent of nickel, 5-30 percent of cobalt, 1-9 percent of lead, 5-10 percent of a bonding agent and the balance of an ultra-hard material, wherein the volume ratio is 60-100 percent; the metal purity of the copper, the silver, the aluminum, the zinc, the tin, the iron, the nickel, the cobalt and the lead is over 99 percent; the granularity of the ultra-hard material is 200-1,000 meshes; the honing stone is prepared by performing mixing, cold press molding and vacuum hot press process on the raw materials according to the mixture ratio. The mixed ultra-hard abrasive honing stone disclosed by the invention has the advantages of sharp grinding, high grinding efficiency, large grinding weight, short grinding time, long service life, superior self-sharpening property, low process cost, easiness and convenience in preparation, and the like.

The invention relates to a wheel, in particular to a rail grinding wheel, which is formed by mixing, sintering, wrapping, drying and hardening the following components in parts by weight: 70-100 parts of zirconia alumina, 5-8 parts of vulcanized iron powder, 4-8 parts of cryolite, 1-3 parts of calcium carbonate, 1-4 parts of gypsum powder and 7-10 parts of phenolic resin. In the invention, the zirconia alumina is selected as the main material of the rail grinding wheel and the vulcanized iron powder, the cryolite, the calcium carbonate, the gypsum powder and the phenolic resin for heat rejection, heat conduction and reinforcement are added on condition that the cutting force is ensured. The wheel manufactured by the invention not only has the advantages of better self-sharpening performance and grinding performance, higher cutting efficiency and low frequency of burn and crackle when a rail is grinded via the wheel, but also has the advantages of higher strength and good breakage proofness.

The invention relates to a rubber thin sheet grinding wheel and a preparation method thereof. The rubber thin sheet grinding wheel comprises the following raw materials in part by weight: 4 to 6 parts of natural rubber emulsion, 0.5 to 1.5 parts of zinc oxide, 4 to 6 parts of sulfur, 0.5 to 2.5 parts of epoxy resin, 0.4 to 0.6 part of anti-ager, 0.3 to 0.7 part of accelerant, 6 to 8 parts of silicon carbide, 2 to 4 parts of diamantane, 2 to 4 parts of chromium corundum, 1 to 3 parts of resin powder, 0.5 to 1.5 parts of resin liquid and 3 to 5 parts of coagulator. The rubber thin sheet grinding wheel of the invention has the advantages of high wear resistance, heat resistance, self-sharpening property, heat conductivity, corrosion resistance, toughness, hardness and working efficiency and long service life; in addition, the rubber thin sheet grinding wheel prepared by the preparation method of the rubber thin sheet grinding wheel of the invention is very thin and has low loss and high accuracy during cutting.

The invention discloses a metal ceramic composite binding agent and a composite binding agent diamond grinding wheel manufactured by adoption of the metal ceramic composite binding agent. The metal ceramic composite binding agent is composed of, by weight, 65 percent to 75 percent of metal powder and 25 percent to 35 percent of ceramic powder. The metal powder is composed of, by weight, eight percent to ten percent of tungsten, five percent to eight percent of tin, five percent to eight percent of zinc, three percent to five percent of lead, and the balance copper. The ceramic powder is formed by mixing and melting, by weight, 40 percent to 50 percent of SiO2, 20 percent to 30 percent of Al2O3, 10 percent to 20 percent of K2O, five percent to 15 percent of MgO, and three percent to eight percent of Fe2O3. According to the composite binding agent diamond grinding wheel manufactured by adoption of the metal ceramic composite binding agent, the good sharp and self-sharpness characteristics of a ceramic composite binding agent diamond grinding wheel can be kept, and the high-rigidity and good-shape-maintaining advantages of a metal binding agent diamond grinding wheel are achieved.

The invention discloses a metal and ceramic bonding agent and a preparation method of the metal and ceramic bonding agent, a CBN grinding wheel and a manufacturing method of the CBN grinding wheel. The metal and ceramic bonding agent is composed of, by mass fraction, 75%-92% of ceramic and 8%-25% of metal. The ceramic is composed of, by mass fraction, 40%-65% of SiO2, 8%-35% of B2O3, 6%-20% of Al2O3, 5%-18% of Na2O5, 0.5%-5% of CaO, 3%-10% K2O, 0.5%-2% of MgO and 2%-6% of TiO2. The metal is composed of, by mass fraction, 55%-80% of Cu, 15%-30% of Sn and 5%-20% of Ni. The metal and ceramic bonding agent can be used as a CBN grinding wheel bonding agent and overcomes the defects that in the grinding process of the ceramic CBN grinding wheel, the surface roughness of a workpiece is large, chatter marks are generated easily, and impact resistance is poor.

The present invention is one kind of grinding tool with semi-fixed abrasive particle and its making process. The grinding tool consists of abrasive grain in 80-90 wt%, adhesive 1-10 wt% and additive 5-15 wt%. Its making process includes the following steps: 1. mixing abrasive grain, adhesive and additive, sieving and mixing with water; 2. molding the mixture in a mold; 3. eliminating bubbles from the molded grinding tool; and 4. stoving the grinding toll in a stove for curing and demolding to obtain the grinding tool with semi-fixed abrasive particle. The present invention has high processing precision and high processing efficiency.

The invention discloses an ultra-thin resin dicing blade for QFN high-quality cutting. Burdening of the ultra-thin resin dicing blade comprises a resin bond, diamond and inorganic filler, wherein the volume fraction of the diamond ranges from 12.5% to 30%, the grain size of the diamond ranges from 38 microns to 104 microns, and the volume fraction of the resin bond ranges from 35% to 55%. The inorganic filler is composed of silicon carbide, graphite and chromic oxide, the silicon carbide accounts for 6%-25% of the volume fraction of the total burdening, the graphite accounts for 3%-8% of the volume fraction of the total burdening, and the chromic oxide accounts for 5%-15% of the volume fraction of the total burdening. In the formula, the strength of the dicing blade can be greatly improved through the silicon carbide and the chromic oxide in the formula, meanwhile, the service life of the dicing blade is prolonged, a small amount of graphite is used for assistance, the self-sharpening capability of the blade can be improved, and good cutting quality and stability of the blade are kept. The invention further discloses a preparing method of the above dicing blade. The preparing method comprises the steps that raw materials are mixed through a wetting agent, and hot pressing, secondary curing and machining are conducted. The process is simple, the characters of the raw materials can be brought into full play, and the efficient, high-quality and ultra-thin resin dicing blade suitable for QFN cutting is prepared.

The invention relates to a metallic bond, a diamond grinding wheel prepared through the bond and a preparation method of the diamond grinding wheel. The metallic bond comprises, by weight percent, 95%-99% of copper-tin prealloyed powder, 0.5%-3% of graphite powder and 0.5%-2% of nanometer alpha-Al2O3. The copper-tin prealloyed powder, the graphite powder, the nanometer alpha-Al2O3 and diamond are taken according to a certain proportion, procedures of burdening and material mixing, pelletizing, compression, sintering and aftertreatment are carried out in sequence, and tool bits can be prepared. The multiple tool bits are arranged on a matrix at equal distance in the circumferential direction, the cambered surfaces of the tool bits are perpendicular to the matrix, and the diamond grinding wheel is prepared. The above tool bits are uniform in ingredient and good in density, diamond distribution is uniform, and the control effect of the metallic bond on the diamond is good. The grinding wheel has the beneficial effects of being good in ground workpiece surface quality, free of dark cracks and scratches, sharp in grinding and long in service life, facilitating large-scale production and the like and is especially suitable for producing sapphire wafers with the thinning thickness ranging from 100 micrometers to 700 micrometers.

The invention particularly relates to a high-precision blade part efficient and precise grinding microcrystal ceramic corundum grinding wheel and a machining method of the grinding wheel. The grinding wheel comprises a non-grinding layer part and a grinding layer part, and is characterized in that the non-grinding layer part comprises 100 parts of WA No.120, 16-20 parts of binding agents, one to four parts of adhesives and three to six parts of wetting agents; the grinding layer part comprises 50 parts of CA No.60-120, 50 parts of WA No.60-120, 8-14 parts of bonding agents, one to four parts of wetting agents and 6-15 parts of pore-forming agents. The machining method of the grinding wheel is characterized by comprising the following steps of (1), material preparation and mixing, (2), forming, (3), drying and (4), firing. The grinding wheel has the advantages of having the deep cutting performance, large feeding performance, heavy load performance and efficient grinding performance, being high in durability, long in service life, good in self-sharpening performance, free of blocking, low in cost and good in grinding stability and the like.

The invention discloses a diamond grinding wheel for metal binding agent. The diamond grinding wheel for metal binding agent is characterized bu being made up of metal powder, copper-cerium alloys, pore-forming agents, TS-1 titanium silicalite molecular sieves and diamond composite abrasive grains; the metal powder is iron powder, copper powder, nickel powder and tin powder; the pore-forming agents can be PE/CeO2/Cu compound; and the diamond composite abrasive grains are diamond/cerium oxide nuclear shell composite abrasive grains. According to the invention, the defects of poor self-sharpening property and low efficiency of the diamond grinding wheel for the metal binding agent are overcome; and the diamond grinding wheel for the metal binding agent has good mechanical property and self-sharpening property, and is high in holding force of diamond, good in molding property and long in service life.