34results about How to "Good cutting sharpness" patented technology

The invention discloses an anti-impact diamond layer, an anti-impact diamond composite sheet and a preparation method for the diamond composite sheet. Coarse granular diamond is used as a main raw material, graphite is used as a filling agent, and iron-based powder is used as an accelerant; the diamond layer comprises the following components in part by weight: 70 to 80 parts of diamond, 10 to 20 parts of graphite powder, and 3 to 12 parts of accelerant; and the accelerant consists of the following materials in part by weight: 45 to 60 parts of iron, 15 to 20 parts of nickel, 5 to 15 parts of cobalt, 5 to 20 parts of manganese, and 3 to 10 parts of silicon. The method comprises the following steps of: mixing the raw materials in the ratio uniformly, pre-pressing the mixture and a hard alloy matrix into a composite sheet, filling into a pyrophyllite block to form a structural block, putting the structural block into a 6-surface diamond presser, sintering and electrolyzing at a high temperature under high pressure, and thus obtaining the diamond composite sheet. The diamond composite sheet has the characteristics of big pores and a mesh connection structure, and is quite suitable for drilling medium hard and hard strata due to excellent sharpness and impact toughness.

A grinding method comprises steps of simultaneously grinding plural grinding portions of a workpiece by plural grinding wheels T1, T2 moved individually each other, and terminating said grinding by a predetermined grinding wheel T1 prior to a termination of said grinding by the other grinding wheel T2. Whereby, a content of the grinding by each grinding wheel T1, T2 can be same. A grinding condition in each grinding by each grinding wheel T1, T2 can be changed in accordance with a measuring result of the grinding portion in the grinding.

The invention relates to a composite multi-layer diamond tool bit and belongs to the technical field of diamond sintering tools. The composite multi-layer diamond tool bit comprises a plurality of diamond cutting layers. The adjacent diamond cutting layers are bonded through metal layers. Each diamond cutting layer is composed of a carcass and diamond particles impregnated in the carcass. The concentration of the diamond particles in the diamond cutting layer located in the middle is greater than those of diamond particles in the diamond cutting layers located on the two sides. The hardness ofthe carcass in the diamond cutting layer located in the middle is smaller than those of the carcasses in the diamond cutting layers located on the two sides. The composite multi-layer diamond tool bit is used for a diamond saw blade and applied to processing of stone materials such as granite and marble and cutting of concrete pavements, the cutting speed is high, the cutting sharpness is high, the performance is stable, energy consumption can be reduced easily, in addition, used diamond is small and does not contain the elements including the Co element and the like, and the tool cost can belowered easily.

The present invention provides a replaceable micro-surgical instrument which comprises a pull structure and a hollow tube attached to a grip. The hollow tube has a sleeve at one end with a U-type elastic element sliding in. The U-type elastic element includes a spring tension section and two opposite extending arms and the outer edge of each arm is against the inner wall of the sleeve. Two arms could move according to the pull structure to selectively extend out of the sleeve to be opened or pull back into the sleeve to be clip together. Particularly, there is a replaceable micro-surgical element set in the front-end of each arm, so when the micro-surgical element becomes blunt or broken, the doctor could only replace the micro-surgical element without replace a whole new instrument in order to reduce instrument cost, increase replacement rate, and maintain the quality of medical surgery.

The invention relates to an energy-saving efficient diamond sawblade, and belongs to the technical field of diamond sintering tools. The energy-saving efficient diamond sawblade comprises a circular steel base body, and a compound multi-layer diamond cutter head which is welded on the circular steel base body, wherein the compound multi-layer diamond cutter head comprises a plurality of diamond cutting layers, and each multi-layer diamond cutting layer comprises a blank body, and diamond particles which are embedded into the blank body; the concentration of the diamond particles in the intermediate diamond cutting layer is more than the concentration of the diamond particles at two sides; and the hardness of the blank body in the intermediate diamond cutting layer is less than the hardnessof the blanks in the diamond cutting layers at two sides. The energy-saving efficient diamond sawblade is applicable to processing of stones such as granites and marbles and cutting of a concrete pavement; the energy-saving efficient diamond sawblade has the characteristics of being quick to cut, high in cutting sharpness, and stable in performance; and moreover, the energy consumption can be decreased; in addition, the used diamond includes a little or excludes rare Co element and other components, so that the tool cost is decreased.

The invention discloses a high-sharpness low-cost water drill tool bit and a preparation method thereof. The water drill tool bit is formed by mixing and sintering metal powder and diamond, the metal powder comprises the following components, in parts by weight, of 37 parts to 47 parts of iron, 20 parts to 30 parts of copper, 2 parts to 5 parts of tin, 27 parts to 35 parts of iron-based alloy and 0.3 part to 0.6 part of zinc stearate, and a volume of the diamond accounts for 20% to 30% of a volume of the metal powder. According to the water drill tool bit, different amounts of Fe, Cu, Sn and iron-based pre-alloyed powder are added to maintain a hardness HRB, bending strength and an abrasive ratio of a matrix, so that the mechanical property and wear resistance of the water drill tool bit are met, the iron-based alloy is added in a formula of the tool bit, a defect of insufficient alloying in the matrix can be reduced, an organizational structure of the matrix is improved, and the mechanical property of the matrix is further improved. The prepared water drill tool bit is sharp in cutting and moderate in service life greatly reduces the cost, is suitable for rapid cutting of reinforced concrete, and has the good market application prospect.

The invention discloses low-temperature sintering matrix powder, a diamond tool adopting the same and a preparation method thereof. The matrix powder is prepared from, by mass, 5-17% of Sn, 5-25% of Co, 1-10% of Me, the balance Cu and inevitable impurities, wherein Me is selected from at least one of amorphous powder, pre-alloying powder containing rare earth elements, Ni and graphite. The matrixpowder is copper-based matrix powder, so that the sintering temperature is obviously decreased, energy loss is lowered, the mold loss is lowered, and the production cost is lowered; meanwhile, damageto diamond during high-temperature sintering is reduced, the level of diamond adopted by the tool can be lowered properly, and the material cost of the tool is lowered.

The invention discloses a reciprocating type linear cutting electric shaving tool bit which comprises a fixed cutter support and a fixed cutter, wherein the fixed cutter support is provided with a left supporting part and a right supporting part for supporting the fixed cutter from the two sides, an inner containing cavity is formed between the fixed cutter and the fixed cutter support, a hair inlet groove is formed between the fixed cutter and the fixed cutter support, and a movable cutter matched with the fixed cutter is arranged in the inner containing cavity, a middle mounting hole is formed in the middle of the top wall of the fixed cutter, a middle cutter net which penetrates through the middle mounting hole and protrudes above the top surface of the fixed cutter is arranged in the inner containing cavity, and a middle cutter which is matched with the middle cutter net and can reciprocate back and forth for cutting is arranged below the middle cutter net; and also comprises a transmission part which is used for connecting the movable cutter and the middle cutter with a power device of an electric shaver; the invention further discloses the fixed cutter used for the electric shaving tool bit. The invention further discloses a method for manufacturing the electric shaving tool bit. The electric shaving tool bit is simple in structure, small in size and good in cutting performance, and has the cutting function of protruding from the middle to the upper portion of the fixed cutter.

The invention discloses a preparation process of a laser welding saw blade, and belongs to the technical field of preparation of material cutting machining tools. The laser welding saw blade comprisesa saw blade base body and a plurality of diamond tool bits evenly distributed on the outer edge of the saw blade base body; each diamond tool bit is composed of a tool bit base body on the inner sideand a tool bit brazing layer on the outer side; a concave notch groove is formed in each of the two sides of each diamond tool bit in the radial direction of the saw blade base body so that chip removal can be facilitated during cutting machining; each diamond tool bit of the saw blade is formed by brazing and sintering a metal bonding agent and diamond particles under the vacuum condition; and then a laser welding method is adopted to weld the diamond tool bits with the saw blade base body. The laser welding saw blade prepared through the method has the advantages that the diamond particlesand the tool bit base bodies are firmly combined, the tool bits and the saw blade base body are reliably connected, the process is simple, and the cost is low.

The invention relates to a method for producing a strengthened ultrathin diamond circular saw web. The method comprises the first step of providing a circular saw web base body, wherein the ratio of the thickness of the saw web base body to the diameter of the saw web base body ranges from 0.0020 to 0.0035; the second step of welding a diamond cutting head to the end of the saw web base body according to the laser welding technology; the third step of concentrically arranging strengthened circular saw web bodies on the two sides of the circular saw web base body, wherein the ratio of the diameter of the strengthened circular saw web bodies to the diameter of the saw web base body ranges from 0.24 to 0.45. The strengthened ultrathin diamond circular saw web produced with the production method has the advantages of being narrow in cutting joint, small in number of consumed materials and cutting deviation, neat in cutting edge, good in cutting sharpness and the like and solves the problems that the cutting joint is large, the number of the consumed materials is large, the cutting edge is not neat, and material consumption is large in the ceramic, glass and jade machining process.

The invention discloses a novel hard alloy inner-cooling deep hole twist drill. The novel hard alloy inner-cooling deep hole twist drill comprises a cylindrical handle part and a cutter body arranged on the cylindrical handle part, the cutter body comprises a cutting edge part and a transition neck part connected with the cylindrical handle part and the cutting edge part, chip grooves are formed in the cutting edge part, and the cutting edge part adopts the front inverted cone and rear parallel core thickness design. The chip grooves intersect with the solid part of the cutter body to form two auxiliary cutting edges and two edge flaps, the cutting edge part is provided with two rear cutter faces and two chip containing grooves, the two rear cutter faces intersect to form a chisel edge, the two rear cutter faces intersect with the two chip grooves to form two main cutting edges, the two rear cutter faces intersect with the two chip containing grooves to form two inner cutting edges, and the cutting rake angles of the main cutting edges and the inner cutting edges are different. According to the novel hard alloy inner-cooling deep hole twist drill, the problems that the deep hole machining cutting temperature is high, chip removal is not smooth, the cutter rigidity is poor, vibration deflection is prone to happening during drilling, consequently, the cutter is worn, the cutting edge is broken, and a drill rod is broken are solved.

The invention discloses a hot pressing die of a diamond tool bit, a preparation method of the diamond tool bit, the diamond tool bit and a diamond drill bit, and the prepared diamond tool bit is in an arc sheet shape and comprises a drilling and cutting tool bit with a rectangular longitudinal section and a sharp-corner tool bit with a triangular longitudinal section; according to the hot-pressing die for the diamond tool bit, the upper pressing head and the lower pressing head are respectively divided into two parts for the drilling and cutting tool bit and the sharp-corner tool bit, so that the structure of the die pressing head group is simpler, and the manufacturing cost is lower; hot-pressing pressure can be provided according to a shrinkage ratio during hot-pressing sintering, so that the use is more flexible; the top of the drilling end face of the manufactured diamond tool bit forms a triangular pinnacle tool edge, so that excellent self-sharpening and sharpness of the tool bit are kept, and the diamond tool bit is high in wear resistance and long in service life; the formed diamond tool bit is small in size and shape error, high in precision and good in quality; the diamond drill bit can rapidly cut in a material to be drilled and cut, the drilling and cutting speed of the tool bit is increased, the drilling and cutting sharpness is improved, and the cutting stability and safety are guaranteed.