35results about How to "Reduce thermal wear" patented technology

The invention discloses a cutting fluid in the process of processing superhard materials. The cutting fluid includes the following components: molybdenum disulfide, tartaric acid, chlorinated paraffin, oleic acid, sodium petroleum sulfonate, transformer oil and / or soybean oil. The cutting fluid formulated by the method of the present invention can lubricate and cool under the high temperature condition of 600-1000°C, and is especially suitable for cutting high-hardness materials. The key technology that can process high-hardness materials with commonly used tools. Compared with other cutting fluids, this cutting fluid has the advantage that it can be better attached to the tip of ordinary tools, and can work normally under the high-temperature conditions of cutting high-hardness materials and generating high heat. Cutting high hardness materials, greatly improving tool life. When cutting high-hardness materials, ordinary turning tools can be used, which reduces the production cost and meets the needs of actual production. The cutting fluid is easy to prepare and the preparation cost is not high.

A dual-wall screw well drilling system based on gas-liquid two-phase drive comprises a ground system, a well opening device and a downhole drilling tool assembly. The ground system comprises a gas storage and collection tank and a liquid storage and collection tank, wherein the gas storage and collection tank and the liquid storage and collection tank communicate with the well opening device through an air compressor and a liquid high-pressure pump correspondingly and then are connected with a gas-liquid two-phase flow recovery device. The gas-liquid two-phase flow recovery device comprises asand recover, a back-pressure valve and a ground gas-liquid separation device. The downhole drilling tool assembly comprises a dual arm drilling rod I connected with the well opening device. The lowerportion of the dual arm drilling rod I is sequentially connected with a short joint, a dual-wall screw motor, a universal joint, a downhole gas-liquid separation device I, a dual arm drill rod II anda drill bit. According to the dual-wall screw well drilling system, the problem that an air screw is prone to being damaged under a well can be reduced, the rock breaking efficiency can be improved,and therefore safe, rapid and economical well drilling can be achieved on a horizontal well and a directional well.

The invention discloses a composite drill bit suitable for a stratum difficult to drill. The composite drill bit suitable for the stratum difficult to drill comprises a drill bit body, cutter wings which are fixedly connected with the drill bit body, tooth wheels which are rotatably connected with the drill bit body, and water holes or nozzles which are arranged on the drill bit body. A plurality of first sets of cutting teeth are arranged on each cutter wing. Pits are formed in the sides, provided with the teeth, of the cutter wings and used for fixing the first sets of cutting teeth. The tooth wheels are rotatably connected with the drill bit body through tooth palms. Teeth are mounted on the tooth wheels. In the common coverage area of the body contour line of at least one cutter wing and the body contour line of at least another cutter wing, at least one non-overlapping area and at least one overlapping point or overlapping area exist. Through the structure characteristic, the drill bit can operate in an asynchronous cutting mode, the longitudinal abrasion length of the drill bit can be increased, and the service life of the drill bit can be prolonged; and the drill bit is in a high-specific-pressure drilling state in the whole drilling process, the capacity to intrude into rocks of the drill bit is improved, the drilling speed of the drill bit in the stratum difficult to drill is increased accordingly, and the service life of the drill bit in the stratum difficult to drill is prolonged.

The invention discloses a disc cutter type multiple drill bit suitable for a hard-to-drill stratum. The disc cutter type multiple drill bit comprises a drill bit body, a plurality of cutter wings extending to the drill bit body, a disc cutter rotatably connected relatively to the drill bit body, and a water hole or a nozzle formed in the drill bit body; a plurality of first groups of cutting teeth are formed in the cutter wings, a slot is formed in the tooth surface of the cutter wing to fix the first group of cutting teeth, the disc cutter comprises a disc cutter body and disc cutter teeth arranged on the disc cutter body, the contour line of a body of at least one cutter wing and the contour line of a body of at least another cutter wing have at least one mismatched area in the common coverage area and at least one matched point or matched area. The structural feature enables the drill bit to work in an asynchronous cutting manner, so that the longitudinal abrasion length of the drill bit is increased, the service life of the drill bit is prolonged, in addition, the drill bit is kept in a high specific pressure drilling state in the whole drilling process, and the capability of the drill bit drilling in a rock is strengthened. Therefore, and the drilling speed and the service life of the drill bit in the hard-to-drill stratum are increased and prolonged.

The invention discloses a method and a device for performing electric magnetization resistance welding-braze welding compounding on dissimilar materials by assistance of an applied magnetic field. In the process of performing resistance welding-braze welding on the dissimilar metal material, a liquid solder is subjected to auxiliary electromagnetic stirring and ordered control, and the molten liquid solder is subjected to the reinforced booster action of electromagnetic stirring and electric magnetization by using an external applied alternating magnetic field which is generated by a magnet exciting coil in a welding area so as to promote directional flow of the liquid solder, and rupture of membranes, wetting, spreading and diffusion of the liquid solder on the surface of the metal material with a higher melting point, promote the liquid solder and a base metal which is molten by the metal material with a lower melting point to be mixed fully, promote interdiffusion of elements and compositions between the solder and the base metal and alloying between the two, improve uniformity of compositions of a soldered seam, reduce the weld defects, optimize the texture and the performanceof the soldered seam, and improve the resistance soldered joint; and the device has the advantages of simple structure, flexible application, lower cost, good effect, and easy implementation.

The invention relates to the field of brake pads, especially to a brake pad with a bionic structure and a preparation method thereof. The brake pad comprises a brake pad substrate (1). A bionic reinforced framework (2) is arranged on one surface of the brake pad substrate (1); and compacted wear-resistant materials (3) are arranged in a gap of the bionic reinforced framework (2). The brake pad has the advantages of less friction coefficient variation, less thermal wear, higher reliability and longer service life at the high temperature.

The invention relates to a guide roller of an automatic plate slitting unit, which includes a roller frame, a feeding guide roller assembly, a feeding guide pressure roller located directly above the feeding guide roller assembly, a slitting roller, and a roller located directly below the slitting roller. Anti-oxidation brushing mechanism, separating conveying rollers and leveling rollers located directly above the separating conveying rollers; the set of guide rollers provided by the present invention can effectively prevent oxidation and discoloration of copper strip shears through the anti-oxidation brushing mechanism provided , to avoid the copper shavings and other pollutants produced by the shearing to cause burrs and scratches on the copper strip shearing. At the same time, the cotton brush roller has a cooling effect on the disc knife, thereby reducing the thermal wear of the disc knife and improving the disc. knife life.