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

The invention discloses a novel anti-skid adhesive tape. The adhesive tape comprises an anti-skid layer, a substrate layer and an adhesive layer, wherein the anti-skid layer and the adhesive layer are respectively formed at two sides of the substrate layer, the substrate layer is made of wear-resisting fiber cloth, the anti-skid layer comprises the following main components in percentage: 40%-50% of sand and 50%-60% of fillers, the raw materials of the anti-skid layer are formed on the substrate layer through a coating process, and a strong adhesive is adopted by the adhesive layer. The novel anti-skid adhesive layer disclosed by the invention is in multi-layer composite structure design, and the combination strength among the layers is high; the anti-skid layer is the sand coating and has a self-sharpening property in use, and thus the service life of the adhesive tape is greatly prolonged; and meanwhile, the substrate layer made of the wear-resisting fiber cloth is high in strength and good in corrosion resistance and mold resistance, so that the use performance of the adhesive tape is more excellent.

The invention discloses a remanufacturable large tillage depth rotary tillage blade suitable for returning whole straws to a field. The blade provided by the invention is characterized in that the blade point rotation radius R is not less than 280 millimeters, and is manufactured through the following steps: firstly forging 65Mn or 60Si2Mn utilized as a raw material to obtain a blank satisfying the requirements on size and shape; then carrying out whole hot dipping on the blank; forming a hot-dipped hardened layer with the depth of 10-150 microns and the hardness no less than 1000HV to obtainan intermediate blank the whole surface of which is provided with the hardened layer; and thirdly, carrying out heat treatment on the intermediate blank the whole surface of which is provided with the hardened layer, wherein the heat treatment process comprises whole quenching and medium temperature tempering, so as to obtain a large tillage depth rotary tillage blade the center of which is tempering troostite and the surface of which is the hot-dipped hardened layer. The rotary tillage blade provided by the invention has the characteristics of high-strength surface, high tenacity, high strength, capability of ensuring the requirement on one-time continuous or 150-hour 20cm large tillage rotary tillage operation; and meanwhile, the rotary tillage blade can be repeatedly manufactured, thusgreatly lowering the comprehensive cost of the rotary tillage blade.

The invention discloses a method for preparing a novel antiskid adhesive tape. The preparation method comprises the following steps of: a) preparing a base material layer; b) selecting and preparing raw materials of an antiskid layer; c) coating the antiskid layer; d) coating an adhesive layer; and e) carrying out after-treatment on an adhesive tape. The invention discloses a preparation method of the novel antiskid adhesive tape. The preparation method is reasonable in working procedure arrangement, is simple and convenient to implement, and is moderate in cost; the adhesive tape is of a multi-layer composite structure and has high interlayer bonding intensity; the antiskid layer is a sand material coating, has a self-sharpening property in the using process, and effectively prolongs the service life of the adhesive tape; and the base material layer is made of an abrasion-resistant filter material, and the base material layer has favorable abrasion-resistant and anti-bacterial functions, and is high in intensity; and using performances of the adhesive tape are more excellent.

The invention discloses a silage maize harvester, and a cutting tool and a cutting cutterhead for the silage maize harvester. The cutting tool comprises a cutting tool body in the shape of a fan ring.A toothed structure is arranged at the working end of the outer edge of the fan ring of the cutting tool body. A blocky cutting blade is arranged on the upper surface of the tip of each tooth of thetoothed structure, and the hardness of each cutting blade is greater than that of the cutting tool body to achieve automatic blade sharpening of the cutting tool during operation. During long-term operation of the cutting tool, the cutting tool body wears rapidly, the cutting blades wear slowly to naturally form cutting blades of cutting portions, and accordingly, automatic blade sharpening is achieved; the wear resistance and sharpness durability of the cutting tool are improved, and operation power consumption of the silage maize harvester is reduced.

The invention provides an internal connection mechanism of a lithium battery box. Any large-current lead wire, which easily generates heat, does not exist among twenty lithium batteries arranged in the internal connection mechanism; and six positive electrode connection plates of a lithium battery and a plurality of connection plates of an eleventh negative electrode plate of the lithium battery are connected with a lithium battery socket at the outer part of the lithium battery to form a lithium battery box which is arrayed in sequence and is durable and reliable. Pressing joint contacts of the internal connection mechanism of the lithium battery box are provided with grooves and the grooves are characterized in that one straight groove is connected with two symmetrical arc-shaped grooves to form two bulges; and two through holes are formed in each bulge so as to form the pressing joint contact. The material is an elastic plate subjected to normalization treatment or a titanium memory alloy.

The internal connection mechanism of the lithium battery box, without any high-current wires that are prone to heat, is composed of the six anode connecting plates of the lithium battery and multiple connections to the eleventh negative connecting plate of the lithium battery. The connecting plate is connected with the lithium battery socket outside the lithium battery to form an orderly and durable lithium battery box. The crimping contact of the internal connection mechanism of the lithium battery box is provided with a groove, and the groove is connected with two symmetrical arc grooves by a straight groove to form two protrusions, and two protrusions are respectively arranged on the protrusions. A through hole to form a crimp contact. The material is elastic plate which has been heat treated by normalizing or titanium memory alloy.

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 a punching head and a manufacturing method thereof and a composite small grinding head. The manufacturing method comprises the following steps that a sintering body powder mixture is compressed through a mold and two flaky pressing heads, lateral pressing is carried out on the sintering body powder mixture; and the sintering body powder mixture is pressed into a powder metallurgy sintering body of a cuboid structure; and the upper end of the powder metallurgy sintering body is machined to be of a cylindrical structure, the lower end of the powder metallurgy sintering body is machined to be of a hemispheric structure, and the punching head is obtained. According to the punching head, the pressing strength can be greatly improved, the portion causing the insufficientdensity of the sintering body due to pressure losses caused by a mold clearance can be located at a corner and is finally cut off, and the quality of the punching head is ensued; and by means of a laser welding manner, the punching head and a grinding head base are solidified, the punching head achieving high-strength connection can be obtained, and the composite small grinding head is manufactured.

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.

A polyurethane matrix stone grinding and polishing pad and a preparation method thereof. The stone grinding and polishing pad relates to a novel stone grinding and polishing material made by preparing a polyurethane matrix and mixing therewith synthetic diamond powder, silicon carbide, silicon oxide, aluminum oxide, and a zinc oxide ultrafine powder as abrasive components. A density of the stone grinding and polishing material is 0.1 to 0.5 g / cm3, and a Shore A hardness thereof is 30 to 85. The polyurethane matrix has suitable foam walls and holes, and abrasive particles are mixed therein and distributed in a multi-dimensional structure of the polyurethane foam wall. The surface of a stone is ground under pressure and rotation of grinding equipment, while simultaneously, continuously and regularly releasing new sharp abrasive particles having a working face at a different layer. The abrasive particles have better self-sharpening performance, and thus have a higher grinding effect and efficiency.

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 relates to the field of superhard materials, in particular to a diamond grinding wheel which is excellent in impact resistance and shape retention, can bear higher load during a high-speed grind process, and comprises a steel core and an abrasive material ring adhered together through a resin adhesive; the abrasive material ring is characterized by being prepared from the following raw materials in mass percent: 25-50% of diamond abrasive material, 44-72% of a metallic bond and 3-6% of an auxiliary adhesive. The diamond grinding wheel has excellent heat conductivity to facilitate reduction of grinding temperature so as to reduce power loss and increase grinding speed; the auxiliary adhesive in the formula facilitates formation of pores, and the characteristic of high holding force of the metallic bond is combined, so that the chip space can be effectively increased, and the utilization of the abrasive material is more sufficient; and the grinding wheel has the characteristics of high grinding efficiency, low grinding temperature and power loss, high machining precision and long service life.

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.

A lithium electric chainsaw with a conjugated bow back for self-sharpening saw blades, including the bow back edge chain saw blade (129), which is a bow back edge chain saw blade with back-to-back conjugate sharpening blades facing outwards, The blade surface of each piece of the curved back edge chain saw blade is first punched by the steel plate into two curved back sides with an included angle, and then sharpened to form a blade; and the curved back edge chain saw blade The outer contours of both sides of each steel plate are slightly equiangular spirals so as to make the cutting angle; the steel plates with slightly equiangular spiral outer contours of each piece of the curved back edge chain saw blade are blanked and Stamping and bending are two arched faces with an included angle, and then sharpened simultaneously to form a blade so as to make a sliding cut angle; The conjugate sharpening blades are sharpened outwards, and the sharpening surfaces are all parallel to the sawing surface when the chain saw blade rotates, so as to facilitate self-sharpening during operation.

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.