42results about How to "Increase grinding ratio" patented technology

The invention relates to a resinoid wedding agent cubic boron nitride grinding wheel and a manufacturing method thereof, the resinoid wedding agent cubic boron nitride grinding wheel comprises a grinding wheel matrix and a grinding layer, the grinding layer is arranged on the external wall of the grinding wheel matrix and peripheries of an upper end face and a lower end face; the grinding layer includes 12-40% of cubic boron nitride (nickel plating), 25-50% of Dialok939p resin, 1-10% of villaumite grinding aid, 1-10% of a solid lubricant filler, 10-30% of a powder filler with high thermal conductivity and 1-15% of oxide filler by volume percentage of the grinding layer. A specially designed hot pressing dies and separately batch feeding method are adopted, which causes the pressed products to have homogeneous structure and consistent density; the formula of the grinding wheel is simple, and the designed die has the advantages of simple and reasonable structure, easy die filling and die release, the product obtained has high once-pass rate, homogeneous structure and consistent density; the grinding wheel has good grinding performance and long service life, can perform peripheral grinding and end face grinding, and is equivalent to three grinding wheels with the same specification, the matrix and making cost are saved, production cost is reduced, the product value is improved.

The invention discloses a grinding wheel manufacturing method which comprises the following steps of material mixing, wherein quantified grinding materials and binding agents are mixed and prepared according to a technical formula; extrusion forming, wherein the prepared mixed materials are added in a die cavity to be extruded and formed; curing and sintering, wherein a formed grinding wheel is placed in a curing oven or a curing kiln for curing. In the material mixing process, a certain ratio of functional filling with is further added to be mixed with the grinding materials and the binding agents. After the mixed materials are extruded and formed at normal temperature, the mixed materials are subjected to at least one more extrusion after being softened at intermediate temperature. Compared with the prior art, the utilization rate of the grinding wheel grinding materials is improved in the way that the new functional filling is added in the material mixing process on the basis of the existing production technology, the intermediate-temperature softening process and the high-temperature and high-pressure forming process are added based on the primary cold press forming, an assembling line production mode is adopted, production efficiency is improved, and produced grinding wheels have the advantages of being good in binding power, high in grinding efficiency and abrasion resistance, little in dust, and the like.

The invention relates to a steel blank grinding abrasion wheel adopting microcrystal ceramic bonding agents, which is in a structure made of polycrystalline solid materials with the coexistence of glass and crystals and adopts the bonding agents of clay, feldspar, boron-containing microcrystal glass, pyrophyllite and soapstone to be made into high-intensity and low-shrinkage engineering ceramic bonding agents, good performance of the glass and the ceramics such as high mechnical intensity, wear resistance, corrosion resistance and the like are integrated, then, the glass and the ceramics are combined with mixed grinding materials, a molding pressing method is adopted for the high-pressure double-side pressing process forming, the low-temperature firing is adopted, the positive pressure reducing atmosphere heat simulation crystallization is adopted at the 800 DEG C heat insulation section, and the mixed grinding material and micro porous glass phase high-intensity microcrystal engineering ceramic composite structure is formed, so the intensity and the bonding degree of the steel blank grinding abrasion wheel are greatly improved, the use linear speed of the abrasion wheel is accelerated, and the safety factor is high. The steel blank grinding abrasion wheel belongs to the novel efficient special steel blank grinding abrasion wheel with the characteristics that the intensity andthe hardness are high, the tissue density is uniform, the grinding ratio is great under the condition of high-speed grinding, workpieces can not be damaged through firing, and the automation of iron and steel industries is easy to realize.

The invention discloses an environment-friendly glass grinding fluid, which is efficient, and long in service. The full-synthetic glass grinding fluid is prepared from an organic acid, a boride, an organic amine, a water-based lubricant, a hard water-resisting surfactant, a water-based mould inhibitor, an organic alcohol, a settling agent, a defoaming agent and water in a mixing manner. The glass grinding fluid disclosed by the invention has excellent cooling property, anti-rotting ability and lubricating abrasion resistance, and outstanding hard water resistance, can be recycled for a long period of time, can ensure the working accuracy and the service life of a tool, and has excellent cleaning performance; the blocking phenomenon of a grinding wheel can be effectively prevented; the product is good in settleability; processing is facilitated; the product is free of poison, environment-friendly, free of pollution, small in smell, good in working performance, good in compatibility with a paint of equipment, low in pH value, free of bad effects on skin and the like; the phenomenon that the paint of the equipment peels off is not generated. The grinding fluid disclosed by the invention is simple in reparation method, low in cost, excellent in performance, and good in market prospect at present.

The superhard silicon carbide ceramic nanometer mirror grinding process includes grinding the workpiece with dressed and shaped coarse diamond wheel in Z direction for plastic domain grinding with the cutting depth controlled within 100 nm; shifting the coarse diamond wheel in X direction for the distance fx and performing the next grinding so as to form envelope trace of height he on the surface of the workpiece and form flat smooth nanometer mirror. In the conditions of proper grinding wheel diameter Dish washer, fx smaller than 100 microns, the envelope trace height he will smaller than 15 nm. The present invention makes it possible to realize super precision surface machining in the machine tool of only micron level or submicron level precision. The present invention has low cost, great grinding ratio and high machining efficiency.

The invention discloses a CVD diamond grinding wheel with an ordered micro-structured surface and a making method thereof. The grinding wheel is characterized in that a layer of diamond film is deposited on the outer circumferential face of a grinding wheel hub, a large number of staggered in-order micro grinding units are machined on the whole outer circumferential face of the diamond film, and the top ends of the grinding units are in kidney shapes. The making method is characterized in that through the chemical vapor deposition that is CVD, the diamond film is deposited on the outer circumference face of the grinding wheel hub, a pulse laser beam is adopted to machine the large number of micro grooves with the same geometric dimensioning in the outer circumference face of the whole diamond film, and the large number of micro grinding units are formed; the grinding units are arranged in a staggered and in-order manner, the top face of each grinding unit is in a kidney shape, according to the grinding wheel, the effective sharpening number of the grinding wheel during grinding can be improved, the chip formation efficiency and the surface material removal rate are improved, the cutting performance is improved, the surface machining quality and the cutting efficiency can be improved, the holding force of the grinding wheel hub to the grinding units can be increased, and the service life of the grinding wheel can be obviously prolonged.

A parabolic vibratory impact mill is proposed which comprises a housing having an outer cone, an inner cone and a power-operated vibrator. The shells of the cones have working surfaces in the form of parabolic generatrices: in the bottom part, the concavity of the parabolae is oriented toward the axis of the mill; in the top part, the convexity of the parabolae is oriented toward the axis of the mill. Conditions are created for the autogenous grinding of large pieces in the top part and small pieces in the bottom part, wherein the material partially decelerates in the transition region between the top parabolae and the bottom parabolae, providing for the metered feeding of the bottom region. The advantageous vertical distribution of the load in the grinding chamber provides a grinding ratio of 30 with little wear on the shells and low energy expenditure.

The invention relates to an aspheric surface abrasive belt grinding and polishing tool based on a hydraulic servos. The aspheric surface abrasive belt grinding tool comprises a hydraulic servo system and an abrasive belt tool system connected through a link mechanism, and the abrasive belt tool system comprises an abrasive belt driven by a tool motor, an upper foot support rod and a lower foot support rod, wherein the upper foot support rod and the lower foot support rod are connected through a third bearing. The hydraulic servo system comprises a hydraulic cylinder, the hydraulic cylinder is sequentially connected with a single-way throttle valve, a three-position four-way solenoid valve, an overflow valve, a hydraulic pump, a filter and an oil tank, and the hydraulic servo system adjusts a grinding and polishing pressure of the abrasive belt by controlling strokes of the link mechanism and stabilizes the grinding and polishing pressure through the overflow valve. The aspheric surface abrasive belt grinding and polishing tool solves the problem that the grinding and polishing pressure of the abrasive belt in a grinding and polishing process of aspheric surface optical elements is unstable, and simultaneously the aspheric surface abrasive belt grinding and polishing tool has the advantages of being capable of self adapting to workpiece curved surfaces, good in effects of discharging grinding and polishing sweeps, big in grinding ratio, high in grinding and polishing efficiency, simple in structure and low in manufacture cost.

The invention provides a spiral steel pipe end welding line coping and polishing robot. A two-freedom-degree fine grinding executing mechanism provided with a laser outline instrument is arranged at the executing end of a multi-freedom-degree mechanical arm, the grinding precision and the polishing precision of the mechanical arm are improved while motion control is simplified, and the technical problems that the quality of a welding bead at the pipe end of a spiral steel pipe ground through a multi-freedom-degree grinding mechanical arm in the prior art cannot meet the technology index requirements regulated by the API Spec5L standard and the GBT97111-1997 standard; and manual secondary coping is still needed are solved. The spiral steel pipe end welding line coping and polishing robot can be used for spiral steel pipe outer welding line grinding and is suitable for spiral steel pipe inner welding line grinding, and base metal is not damaged during coping; after coping, the remnant height can be smaller than or equal to 0.1 mm to the minimum and is far higher than the requirements of the API Spec5L standard and the GBT97111-1997 standard; and the laser outline instrument cooperates with a special detection algorithm, and high-precision scanning detection for precision smaller than 0.05 mm can be achieved; and the powerful technology support is provided for high-precision welding line coping.

The invention discloses novel grinding wheel production equipment. The novel grinding wheel production equipment comprises a blender mixer, a pressing machine and a solidification device, wherein a grinding material and a binding agent are added into the blender mixer; functional filler with a certain proportion is also added into the blender mixer, such as silicon carbide fine powder, corundum powder, cryolite powder, iron sulfide powder, fluorite powder, silicon oxide powder and calcium oxide powder, and the functional filler is mixed with the grinding material together. Compared with the prior art, the novel grinding wheel production equipment has the advantages that since the new functional additive is added in the mixing process on the basis of the existing grinding wheel production process, the utilization rate of the grinding material of a grinding wheel is improved, on the basis of carrying out primary cold press molding, an intermediate temperature softening device and a high temperature pressing device are added, a flow line production mode is adopted, the production efficiency is improved, the produced grinding wheel has good cohesive force, the grinding efficiency is high, the abrasion resistance is high, dust is little, and the like.

The invention relates to a resin grinding wheel and a preparation method thereof, and belongs to the technical field of resin grinding wheel production, and the resin grinding wheel comprises the following raw materials of an abrasive, phenolic resin liquid, phenolic resin powder, cryolite, pyrite, titanium dioxide, floating beads, alkaline earth oxide and a wetting agent. According to the resin grinding wheel, the raw materials are cooperated, under the conditions that the polished surface of a workpiece is glossy and free of black spots, the resin grinding wheel has high workpiece abrasion loss and grinding ratio and low grinding wheel loss, the service life of the resin grinding wheel is prolonged, meanwhile, the resin grinding wheel further has high compressive strength and hardness, and the resin grinding wheel has a good using effect. According to the preparation method of the resin grinding wheel, by adding the annular magnetic field, twice mechanical pressing and twice curing,the raw materials are fully reacted and self-combined, the density and bonding strength of the resin grinding wheel are improved, the resin grinding wheel shows good comprehensive performance, and meanwhile the preparation method has the advantage of being convenient to control.

The invention discloses an electroplating cubic boron nitride tool manufacturing method of adopting surface activation processing. The method includes cubic boron nitride pretreatment, tool matrix pretreatment, electroplating solution preparation, and CBN tool electroplating; CBN pretreatment adopts sensitizing and activating treatment; finally dipping CBN in electroplating solution to electroplate. The advantages of the invention are improving CBN grain surface activation in CBN pretreatment, forming dispersal palladium particle at CBN surface, increasing binding force between CBN and plate, processing efficiency and using life, and economizing CBN.

Cubic boron nitride abrasive grains which have been provided, on the surface thereof, with grooves having a ratio (w/d) of a width (w) to a depth (d) of less than 1 and a ratio (w/L) of a width (w) to a longth (L) of less than 0.1, and then coated with a metal. The cubic boron nitride abrasive grains exhibit an improved holding power (binding strength) between the metal coating film and the cubic boron nitride abrasive grain, and thus can be used for producing a resin-bonded grindstone which exhibits the combination of a high grinding ratio (long life) and a low grinding power value (good cutting quality).

The invention relates to a heavy-load resin grinding wheel for billet grinding and a manufacturing method thereof. The manufacturing method comprises the steps that a coating material is used for forming a coating film on the abrasive particle surfaces, and coated abrasive particles are obtained; the coated abrasive particles and a binding agent are mixed, and a molding material is obtained; hot pressing is carried out on the molding material to obtain a grinding wheel blank; heat treatment is carried out on the grinding wheel blank, and the heavy-load resin grinding wheel for billet grindingis manufactured; and the elastic modulus of the coating material is at least 12% lower than the elastic modulus of the binding agent, wherein the coating material comprises polyvinyl butyral powder, the polyvinyl butyral powder accounts for more than 65% of the mass fraction of the coating material, and the binding agent is a mixture of thermosetting resin powder, pyrite powder, cryolite powder, lime powder and the binding agent. By means of the method, the impact load generated in the grinding wheel grinding process is weakened, damage of impact force generated during grinding to the abrasiveparticles can be effectively reduced, brittle failures in the using process of the grinding wheel are effectively reduced, and the grinding ratio of the grinding wheel is improved.