34results about How to "Self-sharpening" patented technology

The invention relates to a diamond grinding wheel and a preparation method thereof and belongs to the field of superhard abrasives. The diamond grinding wheel comprises a steel core and an abrasive ring which are bonded through a resin binder and a resin adhesive binder. The abrasive ring is prepared from a diamond abrasive, a metal binder and an auxiliary binder. The metal binder contains Cu powder and Ti powder. The abrasive ring is constituted by the diamond abrasive, the metal binder and pores. The preparation method comprises the steps that (1) the diamond abrasive, the Cu powder and theTi powder are evenly mixed, and a mixture A is prepared; (2) the auxiliary binder and the mixture A are evenly mixed, and a mixture B is prepared; (3) the mixture B is dried; (4) the dried mixture B is screened; (5) the screened mixture B is subjected to cold press molding; (6) a green blank of the abrasive ring is sintered under an inert gas atmosphere, and then a blank of the abrasive ring is prepared; and (7) the blank of the abrasive ring and the steel core are bonded through the resin binder, and the diamond grinding wheel is prepared.

A remanufacturable large-plow deep-plow rotary tiller suitable for full straw returning to the field is characterized in that its turning radius R of the knife tip is not less than 280 mm, and it is manufactured by the following method: first, use 65Mn or 60Si2Mn As a raw material, a billet that meets the size and shape requirements is obtained by forging; then, the obtained billet is subjected to an overall hot-impregnation treatment, and a layer of hot-dipping hardened layer with a depth of 10-150 microns and a hardness of not less than 1000HV is formed on the billet surface as a whole. Obtain an intermediate blank with a hardened layer on the entire surface; thirdly, heat treat the intermediate blank with a hardened layer on the entire surface. The heat treatment process is overall quenching+medium temperature tempering, so that the core is tempered troostite and the surface is hot. Deep tillage rotary blade for impregnating the hardened layer. The rotary tiller of the present invention has the characteristics of high hardness on the surface, high toughness and high strength of the core, which can meet the needs of a continuous or accumulated 150 hours of rotary tillage operations with a large depth of tillage (>20cm); at the same time, the rotary tiller of the present invention can be repeated Manufacturing greatly reduces the overall cost of the rotary tiller.

The invention relates to the technical field of grinding tools, in particular to a preparation process of a multilayer-structured 3D grinding tool. The preparation process comprises the steps of: (1)coating of a primer on an elastic membrane; (2) pressing of a square frame; (3) scraping of an abrasive; (4) primary curing of the abrasive; (5) stamping; (6) mold shifting and curing; and (7) compounding of a sponge layer. The multilayer-structured 3D grinding tool is prepared by the preparation process of the multilayer-structured 3D grinding tool; an abrasive layer achieves self sharpness; in the grinding process, abrasive grains can fall layer by layer; and new abrasive grains are exposed constantly after falling, so that the grinding force is stable. In addition, in the prepared multilayer-structured 3D grinding tool, a groove is formed in the middle part of the abrasive layer, so that abrasive chips generated in the grinding process can be easily discharged from the groove, and the blockage problem of the abrasive chips can be prevented; and the prepared multilayer-structured 3D grinding tool is particularly suitable for a wet grinding procedure.

The invention discloses a bronze-based CBN grinding wheel and a preparation method thereof. The grinding wheel comprises a steel core and an abrasive ring. The steel core and the abrasive ring are bonded through a resin glue binder. The abrasive ring is prepared from a CBN abrasive, a metal bond and an auxiliary binder; the metal bond contains Cu60Sn40 powder and Ti powder; and the abrasive ring is composed of the CBN abrasive, the metal bond and pores. The preparation method comprises the steps that (1) the CBN abrasive, the Cu60Sn40 powder and the Ti powder are evenly mixed, and thus a mixture A is prepared; (2) the auxiliary binder and the mixture A are evenly mixed, and thus a mixture B is prepared; (3) the mixture B is dried; (4) the dried mixture B is sieved; (5) the sieved mixture Bis subjected to cold press molding; (6) an abrasive ring green body is sintered under inert gas atmosphere and then cooled, and thus an abrasive ring blank is prepared; and (7) the abrasive ring blank and the steel core are glued through the resin glue binder, and thus the bronze-based CBN grinding wheel is obtained.

The invention discloses a permanent magnet type liquid magnetic grinding tool surface finishing machining device and method, and belongs to the field of precision finishing machining technologies andfree grinding tools. The permanent magnet type liquid magnetic grinding tool surface finishing machining device is characterized in that the device mainly comprises a liquid magnetic grinding tool, anupper magnetic pole head, a lower magnetic pole head, a mechanism, components, components for supporting and horizontal movement of a workpiece, and other auxiliary components used for achieving finishing machining, wherein the upper magnetic pole head and the lower magnetic pole head are oppositely arranged, the upper magnetic pole head and the lower magnetic pole head synchronously rotate at the high speed with the same angular speed through the mechanism and the components, and the solid-like state is formed in the liquid magnetic grinding tool under the action of the magnetic field generated by the magnetic pole heads. The permanent magnet type liquid magnetic grinding tool surface finishing machining device and method solve the problems that during metal plate workpiece polishing andgrinding through the traditional technology, workpiece deformation, edge collapsing, cutter adhering and cutter breakage happen, and meanwhile the problems that when an existing magnetorheological fluid polishing technology polishes the workpiece, the energy of the magnetic field is not sufficiently utilized, the machining performance is poor, and the machining cost is high are solved; and the advantages that the machining precision and efficiency are high, a machining affected layer does not exist, adjusting is convenient, the technology is simple, and cost is low are achieved.

The invention discloses a non-burning decorative glaze for building exterior walls, and a preparation method thereof. The glaze comprises ultrafine ordinary Portland cement, emery, nano-silica, redispersible latex powder, a superplasticizer FDN, calcined gypsum, alum powder, a natural mineral pigment, lithium carbonate, calcium lignosulphonate, a film forming aid, ethylene glycol, a defoamer and water. Compared with existing real stone paints and coatings, the non-burning decorative glaze for building exterior walls has the advantages of good fireproof property, good acid and alkali resistance, non-toxicity, tastelessness, high strength, high hardness, high tensile bonding strength, richness in color, strong adhesion ability, no sand drop, low construction environment requirements, fast solidification speed, long service life, no whitening or yellowing and no soft coating layer, can replace the novel building exterior wall non-burning decoration glazes of the existing real stone paints, and has great economic and social benefits.