58results about How to "Reduce grinding heat" patented technology

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 discloses a preparation method of a high-strength durable porous diamond grinding wheel, and belongs to the technical field of grinding wheel preparation. Silicon dioxide, aluminum oxide, zirconium oxide and boric acid are used as main raw materials for ball milling, melting, quenching, secondary ball milling and drying to obtain ceramic bonding agent powder; the crystal interface energy is high, so that abrasives of the grinding wheel are not easy to fall during grinding, and the durability, namely the service life of the grinding wheel is improved; a bonding agent of film coating diamond abrasives is in a liquid state at a sintering temperature, and is filled in capillary holes between the abrasives to accelerate compactness of the grinding wheel; meanwhile, through a protection effect of titanium dioxide films on the surfaces of the abrasives, the exhausting of gas in the sintering process of the grinding wheel is influenced, and the service life of the grinding wheelis prolonged; air holes can accommodate grinding chips; the edge rate of the grinding wheel in the grinding process is higher, so that the grinding efficiency is improved; and through a proper porosity, the holding force of the diamond grinding wheel to the bonding agent is improved, so that the strength of diamond is improved, and the application prospect is broad.

The invention discloses a blade tenon grinding fixture. The blade tenon grinding fixture comprises a baseplate achieving a support positioning effect; the upper surface of the baseplate serves as a mounting surface for mounting a blade to be machined; square boxes for auxiliary positioning are cast at a blade basin and a blade back of the blade to be machined; the mounting surface of the baseplate is a horizontally inclined angle surface; a positioning mechanism for clamping and positioning the square boxes is arranged on the mounting surface; and the baseplate is additionally provided with a drainage mechanism for guiding cooling liquid to a tenon of the positioned blade to be machined to reduce the grinding heat. As the mounting surface of the baseplate is designed as the horizontally inclined angle surface, the tenon symmetry center of the blade is conveniently adjusted in the machining process, and the prolonging of the service life of a formed grinding wheel is facilitated; and the drainage mechanism is arranged on the baseplate, so that the grinding heat is reduced, the quick positioning and clamping requirements are satisfied, the dimensional tolerance and the geometric tolerance of the grinded blade tenon reach the technical requirements, the reliability in the machining process is improved, and the service life of the formed grinding wheel for grinding is prolonged.

The invention relates to a batch-type grinding method of a hard coating material, comprising the following steps: carrying out alternate batch-type grinding by adopting a grinding wheel feeding way and a grinding wheel no-feeding way in the grinding process; when the grinding wheel feeding way is adopted, carrying out high-speed or ultra high-speed grinding; when the grinding wheel no-feeding wayis adopted, carrying out no-load reciprocatory grinding; and after every time of feed grinding of a grinding wheel, carrying out the no-load reciprocatory grinding for 2-20 times according to the actual condition; wherein the high-speed or ultra high-speed grinding comprises that the primary feed grinding depth is 10-15mu m, the feeding speed of an operating platform is 6000-30000mm/min, and the linear speed of the grinding wheel is 80-200m/s. In the invention, variation of the actual grinding depth caused by elastic deformation and heat deformation of the grinding wheel and workpieces can beeliminated to the utmost extent, the heat produced at high-speed grinding can be timely released, and the grinding wheel can maintain to be sharp, thus the material removing rate is improved, the grinding surface burning is effectively reduced, the grinding wheel loss and production cost are greatly reduced, and the good processing quality is obtained.

The invention discloses a slotting-type freezing and solidifying grinding material polishing pad, which is characterized in that the center of one surface of a polishing pad, which is opposite to a processed workpiece, is provided with a blind hole (1); the periphery of the blind hole (1) is provided with a groove (2); the diameter d of the blind hole (1) is equal to e-r, wherein e in the formula is the eccentricity of the polishing pad, r is the radius of the polished workpiece, the value of the eccentricity is always 20-105mm, the depth of the blind hole (1) is 10-20mm, the depth of the groove (2) is 50-70% of the depth of the blind hole (1), and the width of the groove (2) is 5-10mm. In the slotting-type freezing and solidifying grinding material polishing pad, different types of grooves of different shapes are manufactured on the traditional freezing and solidifying grinding material polishing pad. Various groove shapes are formed mainly by the action of a slotting die. The polishing pad can be used for polishing and machining various thin workpieces, and is especially suitable for machining heat sensitive materials, soft materials, crystal materials and the like, has the advantages of low machining cost, high machining efficiency, strong technical control capability and the like, is simple to manufacture, is environmentally-friendly.

The invention discloses a drilling pre-formed polycrystalline diamond composite sheet with an efficient chip discharge function. The drilling pre-formed polycrystalline diamond composite sheet comprises a polycrystalline diamond layer and a hard alloy matrix support body. The hard alloy matrix support body is adhered with the polycrystalline diamond layer; the polycrystalline diamond layer comprises an upper surface and an outer edge surface, cutting blade teeth with radial centers are formed in junction regions of the upper surface and the outer edge surface, and chip discharge grooves with radial centers are formed in the junction regions of the upper surface and the outer edge surface; the cutting blade teeth and the chip discharge grooves are connected with one another in certain angle directions, the cutting blade teeth radially extend to be annular distributed, and the chip discharge grooves are radially perforated to be annularly formed. The drilling pre-formed polycrystalline diamond composite sheet with the structure has the advantages that the drilling pre-formed polycrystalline diamond composite sheet is high in sharpness and has an efficient chip discharge merit, the drilling efficiency can be greatly improved, balling phenomena can be prevented, and the control stability of well drilling platforms can be guaranteed.

The invention relates to a manufacturing method of grinding materials and grinding tools, in particular to a preparation method for wear-resisting man-made oilstone. According to the preparation method, silicon dioxide, aluminum oxide, zirconium oxide and boric acid serve as main raw materials, ball milling powder is processed to obtain ceramic binder fragments, the ceramic binder fragments are subject to ball milling, drying and screening to obtain ceramic binder powder, rice hull ash is used as a raw material, palm wax and pericarp are added, fermentation is carried out under the ammonia atmosphere to obtain fermentation filter residues, the fermentation filter residues and diamond particles are mixed to obtain rigid powder, diamond-silicon carbide composite powder is obtained through roasting, and then the diamond-silicon carbide composite powder and additives such as magnesia powder and white corundum are mixed to obtain a to-be-sintered material; and finally, the to-be-sintered material is placed into a graphite jig, the wear-resisting man-made oilstone is obtained through processing, in the rice hull ash fermentation process, the micro rotting effect of microorganisms in thepericarp is used for fixing nitrogen in ammonia gas into the fermentation filter residues, the wear-resisting property of the man-made oilstone and the grinding effect on the high-hardness materials are improved, and the application prospect is wide.

The invention discloses an efficient grooving resin wheel for preventing a workpiece from being burnt and application of the efficient grooving resin wheel. The efficient grooving resin wheel aims to solve the problems, such as workpiece burning, low grinding efficiency, a short maintaining period and incapability in reutilization of waste products, prone to occurrence in the grinding and grooving process of plunger products of a precise oil atomizer. The efficient grooving resin wheel is composed of a base body and a working abrasive layer. The efficient grooving resin wheel is characterized in that the working abrasive layer is made of a resin binder and mixed padding, wherein the resin binder is superfine phenolic resin; the mixed padding comprises, according to the volume ratio, 10-20 percent of superfine WA with the grain diameter ranging from 10 microns to 20 microns, 5-10 percent of nanoscale SiO2 with the grain diameter ranging from 0.03 micron to 0.05 micron, 5-15 percent of superfine Cu with the grain diameter ranging from 0.5 micron to 1.0 micron, 1-10 percent of nanoscale TiO2 with the grain diameter ranging from 0.03 micron to 0.05 micron, 1-3 percent of FeS, 1-10 percent of polycrystalline diamond and 15-30 percent of CBN. The efficient grooving resin wheel has the advantages that grinding efficiency is high, and the cutting edge is sharp; the shape of the efficient grooving resin wheel is well kept, the maintenance period is long, and the service life is long; the workpiece which is ground is high in accuracy, and the dimensional accuracy is not higher than 0.002 mm; the workpiece is not burned, and therefore the waste products caused by burning are eliminated.

The invention provides a composite binder grinding wheel for silicon carbide crystal thinning, a preparation method and an application. The composite binder grinding wheel is prepared from the following raw materials of, by weight, 15%-45% of diamond abrasive, 15%-60% of pre-alloyed powder, 20%-45% of polytetrafluoroethylene, 3%-15% of cerium oxide and 0.5%-6% of a wetting agent. According to thecomposite binder grinding wheel for silicon carbide crystal thinning, the preparation method and the application, an alloy system used is Ga-Cu-Sn, the low-melting-point element of gallium is added into the alloy system, so that the forming temperature of the alloy powder is low, and the problem of heterogeneous forming of a resin metal binding agent is solved. Gallium metal is added to generate eutectic reaction to generate phases beta and delta with high gallium content and high brittleness, so that the conversion of a traditional alloy system from hard toughness to high brittleness is realized, and the self-sharpening property of a binding agent system is improved. The composite binding agent has the advantages of the metal binding agent and the advantages of a resin bonding agent, themetal binding agent forms a framework to improve strength and hardness, the resin powder increases elasticity of a grinding tool, impact resistance in the grinding process is reduced, and the surfacequality of a silicon carbide sheet is improved.

The invention discloses a hole making method for ultrasonic vibration assisted grinding of an SiCp/Al composite. The hole making method comprises the steps that through a grinding tool, hole making iscarried out on the SiCp/Al composite in a grinding manner, in combination with the ultrasonic assisted grinding, a tool bit in the grinding tool can continuously impact and scratch the machined surface under the joint effect of ultrasonic vibration, mechanical grinding and ultrasonic cavitation, the machined material is pulverized into fine particles to be removed, and ultrasonic assisted grinding hole making of the SiCp/Al composite can be achieved. Through the grinding method, the service life of the tool is long, machining precision is high, the grinding heat is low, and the workpiece machining precision is high.

The invention relates to a spraying abrasive belt flap wheel in gas phase and solid phase for drying type polishing and throwing, wherein the spraying abrasive belt flap wheel is mainly oriented to machining of high-strength and high-tenacity materials difficult to machine. Fan blades and an inner cavity structure for differential rotation of a chassis of the abrasive belt flap wheel are introduced into manufacturing of the abrasive belt flap wheel. The abrasive belt flap wheel is mainly composed of an abrasive belt flap wheel mounting handle, the chassis, a cover disk, the differential fan blades, abrasive belt blades and other parts. In the grinding and throwing process, a main shaft of a machine tool drives the abrasive belt flap wheel mounting handle, a base, a cover plate and the like to rotate together at high speed, the differential blades of the inner cavity of the base are connected with a fan blade mounting sleeve, the rotating speed of the differential blades of the inner cavity of the base is not consistent with that of the abrasive belt flap wheel mounting handle so that driving force can be exerted on lubricating mediums filled in the inner cavity of the base, and the lubricating mediums are precipitated to the surface of the abrasive belt blades continuously and quantitatively under the joint action of the driving force and eccentric force. The abrasive belt flap wheel is simple in structure and easy to popularize, the lubricating mediums in the abrasive belt flap wheel can be reliably conveyed to the grinding and throwing arc area with low cost through the structure, and therefore the drying type polishing and throwing of the high-strength and high-tenacity materials difficult to machine can be achieved.

The invention provides an environmentally-friendly synthetic grinding fluid. The environmentally-friendly synthetic grinding fluid is prepared from 2.5wt% of oleic acid, 5wt% of triethanolamine, 2wt% of sebacic acid, 4wt% of triethanolamine, 2wt% of sodium benzoate, 4.5wt% of polyether, 5wt% of polyethylene glycol, 2wt% of sodium carbonate, 1wt% of ammonium molybdate, 4wt% of glycerin, 0.2wt% of benzotriazole, 0.2wt% of an antifoaming agent, 0.6wt% of isothiazolinone, 0.03wt% of fluorescent green and 66.97wt% of deionized water. The environmentally-friendly synthetic grinding fluid can maximumly reduce a grinding temperature and a grinding force, guarantee a workpiece grinding precision and surface quality, prolong a grinding wheel service life, improve grinding processing efficiency, satisfy antirust and anticorrosion requirements on a machine tool and a workpiece, reduce a use cost, satisfy environmental protection requirements and is suitable for a metallurgy roller in a steel industry.

The invention particularly relates to a medical grinding wheel for grinding insulin needles and a manufacturing method thereof. The medical grinding wheel for grinding the insulin needles is characterized in that raw material components of the medical grinding wheel include, by weight, 60-65% of silicon carbide, 10-18% of micropowder-grade ceramic corundum, 8-12% of modified resin, 5-15% of glass beads, 1-4% of cryolite powder and 1-4% of zinc oxide, and the cryolite powder and the zinc oxide serve as filling agents. Micropowder-grade ceramic corundum abrasive materials can conduct self-sharpening at the nanoscale size during the grinding process, and micro grinding edges are exposed continuously, so that the cutting depth can be increased, and the grinding efficiency can be improved. Poor grinding faces caused by smoothed and blunted abrasive particles can be avoided through the micro grinding edges exposed continuously. During production of the grinding wheel, water pressure pads are adopted in the diameter direction and the thickness direction of the grinding wheel, and the balance performance and structure uniformity of the grinding wheel are improved by 50% more than the specified value of the national standard.

The invention discloses a nano corundum abrasive and a preparation method thereof. The abrasive comprises raw materials and a binder with the weight accounting for 0-6% of the total weight of the raw materials, wherein the raw materials comprise components in percentage by weight as follows: 0-5% of magnesium oxide, 0-5% of silicon dioxide, 0-3% of calcium oxide and the balance of nanocrystalline aluminum oxide powder. The prepared corundum abrasive adopting the nano structure has single crystal particles ranging from dozens of nanometers to hundreds of nanometers, sintered bodies have the enormous crystal boundary, only nanocrystals fall off under the action of external forces or in sharping or trimming, sharp cutting edges are produced continuously, the self-sharpening property is good, products are good in abrasion resistance and have less grinding heat, and the grinding efficiency is high.

The invention provides a layered frozen fixed abrasive polishing pad and a preparation method thereof. The layered frozen fixed abrasive polishing pad is characterized by being prepared through the following steps that firstly, a micron-grade abrasive and deionized water which are proportioned are uniformly stirred and subjected to mechanical dispersion, so that a dispersed and suspended liquid or colloidal to-be-frozen raw material of the abrasive is obtained and placed in a lower mold; secondly, an upper mold is matched with the lower mold, and then polishing liquid is subjected to still standing for 7-8 minutes till obvious concentration layering occurs; thirdly, liquid nitrogen is introduced into a liquid inlet till the polishing liquid is frozen and formed, or the molds are placed into a low-temperature testing box with the temperature being minus 60 DEG C-minus 80 DEG C to be frozen for 2-3 minutes; fourthly, the molds are overall inverted, and hot air is introduced into the liquid inlet for 1-2 minutes, or the hot air is blown to the outer surface layer of the lower mold for 1-2 minutes; and fifthly, the polishing pad preparation molds and the frozen fixed abrasive are separated, so that the polishing pad which is formed by being frozen after being subjected to natural sedimentation and classification and is composed of a micron-grade abrasive layer, a sub-micron grade abrasive layer, a nano-grade abrasive layer and a deionized water layer is prepared. According to the layered frozen fixed abrasive polishing pad and the preparation method thereof, the method is simple, and the polishing pad does not need to be replaced in the using process.

The invention discloses an ultrasonic single-excitation elliptical vibration grinding design method and device. A transducer, an amplitude-change pole and a cup-shaped grinding tool of the device areconnected together through prestressed bolts and nuts, the transducer converts electrical signals provided by an ultrasonic generator into longitudinally-transmitted mechanical vibration, sound wavesof the longitudinal vibration are transmitted to the cup-shaped grinding tool through the transmission effect of the amplitude-change pole, and the cup-shaped grinding tool is divided into a disk segment and a circular pipe segment; and longitudinal vibration excitation of the amplitude-change pole enables the disk segment of the cup-shaped grinding tool to do transverse bending pitch circle typevibration, longitudinal vibration of the circular pipe segment is formed through coupling, and compounding of the three different vibration modes of longitudinal vibration-bending vibration-longitudinal vibration is achieved; through the bending vibration of the disk segment and the longitudinal vibration of the circular pipe segment, composite vibration of longitudinal and radial vibration is shown through coupling at the tail end of the circular pipe segment, in the longitudinal and radial plane, the longitudinal and radial vibration can be coupled to form an elliptical vibration trajectory,the design of a resonant system is simplified, and vibration of a grinding wheel disc is made more ideal.

The invention discloses a metal resin composite material grinding wheel special for steel rail grinding and a manufacturing method thereof, and belongs to the technical field of grinding wheels. The metal resin composite material grinding wheel comprises a base body and a grinding wheel working layer at the upper end of the base body. The grinding wheel working layer comprises brazed CBN agglomerates and resin bond zirconia corundum abrasives; and the brazed CBN agglomerates are cylindrical brazed CBN grinding blocks, and the round surfaces of the brazed CBN agglomerates are grinding surfaces.The brazed CBN agglomerates are evenly and vertically inserted into the resin bond zirconia corundum abrasives at intervals. The metal resin composite material grinding wheel special for steel rail grinding can maintain good sharpness under long time working conditions, generates less grinding heat, improves the removal efficiency of steel rail materials, and reduces the bluing phenomenon of therail burn; and the ground steel rail has better surface quality, lower roughness and finer rail surface.

The invention discloses a special collision-resistance and modification microcrystalline ceramic abrasive material for machine tool industry, and a manufacturing method thereof. The microcrystalline ceramic abrasive material comprises two parts, wherein the first part is a microcrystalline ceramic formed by sintering alumina powder, lanthanum nitrate hexahydrate and hydroxyapatite in a shuttle kiln, the second part is obtained by polymerizing three components A, B and C, the component A is a mixture of a vinyl olefin-based unsaturated monomer, a phosphorus bidentate ligand, lead powder, activecarbon powder and titanium dioxide powder, the component B is an acrylate-based olefin-based unsaturated monomer, the component C is a sodium silicate aqueous solution with a solute mass fraction of10%, and the second part is a microcapsule structure using the lead powder, the active carbon powder and the titanium dioxide powder as a core, using a silicic acid gel as a medium, and using the vinyl olefin-based unsaturated monomer and acrylate-based olefin-based unsaturated monomer polymer as a mold shell. According to the present invention, the special collision-resistance and modification microcrystalline ceramic abrasive material has characteristics of microcrystalline structure, fine and dense grinding blade, high strength, good toughness, self-loss resistance and durability.

The invention discloses methods for oxidation treatment of a CBN abrasive particle and for preparation of a ceramic binder CBN grinding tool by using the CBN abrasive particle. The methods are characterized in that a uniform and compact film is formed on the surface of the CBN abrasive particle with granularity of 70 to 150 mu m through oxidation treatment of the CBN abrasive particle at a temperature of 850 to 1050 DEG C, thereby improving bonding strength of glass powder on the CBN abrasive particle and enhancing bending strength and wear resistance of the ceramic binder CBN grinding tool. Compared with a CBN grinding tool prepared from an unoxidized CBN abrasive particle, the CBN grinding tool prepared from the CBN abrasive particle having undergone oxidation treatment has the following characteristics: a structure is uniform, bonding strength between a binder and the CBN abrasive particle is high, bending strength of the grinding tool is great, and high speed grinding requirements of the CBN grinding tool are met.

The invention belongs to the technical field of metal working fluids, and particularly relates to a roller grinding fluid and a preparation method thereof, and the roller grinding fluid comprises the following components in percentage by mass: 20-26% of ricinoleic soap, 6-10% of polyethylene glycol, 5-10% of an antirust agent, 2-6% of a cosolvent, 2-6% of a defoaming agent and the balance of softened water. The ricinoleic acid soap has large affinity to the metal surface and higher lubricating property than mineral oil, the ricinoleic acid soap and polyethylene glycol have a synergistic effect, the surface tension of the grinding fluid is reduced, and the grinding fluid has good wettability and can rapidly permeate into a contact area of a grinding wheel and a roller in the using process, and a firm lubricating film is formed in the contact area; and the lubricating film effectively reduces friction and abrasion between the grinding wheel and the roller, reduces grinding heat, improves roughness and precision of the roller, and is excellent in lubricating effect when the grinding wheel and the roller are matched for use.