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

The invention discloses a compound bit formed by PDC (polycrystalline diamond compact) bits and a rotary cutting bit. The compound bit comprises a main body (1), rotary cutting bit cones (2), rotary cutting bit cutting teeth (3), PDC blades (4), PDC cutting teeth (5), oil storage sacs (6) and nozzles (7), wherein the main body (1) comprises a cone journal, centralizing blocks, high-pressure slurry channels and a connection screw thread. The compound bit is characterized in that a compound bit cutting unit comprises the rotary cutting bit and a PDC bit cutting unit. The compound bit has the following beneficial effects: the PDC bits complete drilling the central part of the borehole in the drilling process; the linear velocity of the periphery of the borehole is high in the drilling process and the rotary cutting bit and the PDC bit cutting unit complete drilling the periphery of the borehole; and the rotary cutting bit in the compound bit shocks, crushes and cuts the rocks by way of rotary cutting, has high central rock breaking efficiency, high rate of penetration and better dynamic performance, is uniform in wear, simultaneously improves the bit bearing structure, ensures to prolong the service life of the bit while improving the rock breaking efficiency, improves the cutting capability of the compound bit and ensures good gauge protection effect.

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 punching composite drill bit suitable for difficult-to-drill stratums. The drill bit comprises a drill bit body, blades and water holes or nozzles arranged in the drill bit body, wherein each blade is provided with a plurality of first cutting teeth, the tooth arranging face of each blade is provided with sockets for fixing the first cutting teeth, the drill bit body is further provided with punching structures and an impact force transmission mechanism, the punching structures are provided with punching teeth, and the body contour line of at least one blade and the body contour line of at least another blade are provided with at least one non-overlap area and at least one overlap point or area in a joint covering area. By the structure, the drill bit can work in an asynchronous cutting manner, the longitudinal abrasion length of the drill bit can be increased, the service life of the drill bit can be prolonged, the drill bit can be allowed to be in a high-specific-pressure drilling state during the whole drilling process, the rock drilling ability of the drill bit is enhanced, the drilling speed of the drill bit in the difficult-to-drill stratums is increased, and the service life of the drill bit in the difficult-to-drill stratums is prolonged.

The invention discloses an electric cylinder with a circulation cooling channel, and belongs to the field of driving machines. The electric cylinder comprises a machine case, a motor, a lead screw, alead screw nut which are mounted in the machine case, and a front end cover and a rear end cover which are used for sealing the two ends of the machine case. The electric cylinder further comprises acooling mechanism, wherein the cooling mechanism is provided with a lubricating oil circulation channel; the lubricating oil circulation channel comprises a first oil storage area formed by the frontend cover and the gap between the machine case and the motor, a second oil storage area formed in the machine case, and a third oil storage area formed by the rear end cover and the gap between the machine case and the motor, wherein the first oil storage area is communicated with the second oil storage area, and the second oil storage area is communicated with the third oil storage area. The cooling mechanism is utilized to transfer the heat in the electric cylinder out of the machine case through circulation flowing in the lubricating oil circulation channel, the double effects of cooling and lubricating of the electric cylinder are achieved, thermal abrasion is reduced, the stability of the electric cylinder is improved, and the service life of the electric cylinder is prolonged.

The invention relates to a composite cutting diamond drill bit. The drill bit comprises a drill bit body, fixing blades, disc cutters, water channel grooves and water passages or spray nozzles. The fixing blades extend from the drill bit body and are fixedly connected with the drill bit body, the water channel grooves are located among the fixing blades, blade cutting elements are arranged on thefixing blades, and one or more disc cutter cutting units are arranged on the drill bit body, wherein each disc cutter cutting unit is composed of a disc cutter, disc cutter cutting teeth on the disc cutter and a disc cutter shaft; the disc cutters are installed on the disc cutter shafts or are integrated with the disc cutter shafts, and the deviation angle alpha of the disc cutters is larger thanor equal to 20 degrees and smaller than or equal to 90 degrees. The composite cutting diamond drill bit is characterized in that one or more disc cutters are arranged on one fixing blade or in the water channel groove between every two fixing blades, the two sides of each disc cutter cutting unit are supported on supporting bodies respectively and rotatably connected with the supporting bodies, the service life of disc cutter bearings can be effectively prolonged, the safety performance of the disc cutter cutting units during use is improved, the rock breaking efficiency of the drill bit is effectively improved, and the service life of the drill bit is effectively prolonged.

The invention discloses a novel cooling device of a machining center. The novel cooling device of the machining center comprises an installation base, a vertical rod and a rotation mechanism. The vertical rod is fixedly arranged on the top of the installation base. The rotation mechanism is arranged above the vertical rod. A through movement groove with an upward cut is formed in the vertical rod.A vertical supporting rod which can carry out vertical sliding connection is installed in the through movement groove. A supporting rod bottom groove and a slot are formed in the vertical supportingrod, the cut of the supporting rod bottom groove is upward, and the slot is located below the supporting rod bottom groove. A first rotary column is arranged in the slot. A spiral block used in cooperation with the slot in a spiral fit manner is arranged on the top of the first rotary column. A second rotary column is arranged in the supporting rod bottom groove in an upward stretch manner. A rotary shell is arranged on the top of the second rotary column. A spray structure is further installed on the shell. The spray structure penetrates through a fixing metal piece and is in butt joint fit with a rotary liquid inlet pipe. A sealing pressure part, a pressure withstand rotary platform, a liquid sealing ring and a connecting block are arranged on the part, with the outlet, of the liquid inlet pipe. A retainer ring, a limiting rotary platform and a rotary platform fixing part are arranged on the part, with the inlet, of the liquid inlet pipe.

The invention relates to the technical field of gantry machining centers, in particular to an ultrahigh-speed movable column type gantry machining center, and solves the problem that the moving accuracy of a stand column of an ultrahigh-speed gantry machining center needs to be improved in the prior art. The ultrahigh-speed movable column type gantry machining center comprises a workbench, a cross beam arranged above the workbench, a ram arranged on the cross beam, a sliding column installed on the ram and a machining cutting die installed at the bottom end of the sliding column, and further comprises two sets of fixing bases symmetrically arranged, and two moving grooves are symmetrically formed in the tops of the fixing bases. According to the ultrahigh-speed movable column type gantry machining center, when a stand column stopping command is started, speed stopping plates rapidly move downwards till positioning toothed plates connected with outer side plates are vertically connected in an inserted mode so as to limit inertial motion of stand columns, braking of inertial motion of the ultrahigh-speed movable column type gantry machining center is achieved through the up-and-down insertion meshing mode of teeth, and therefore the stability and the accuracy of high-speed movement of the loaded stand columns are realized.

The invention relates to an automatic sheet longitudinal shearing unit guide roller which comprises a roller frame, a feeding guide roller assembly, a feeding guide pressure roller located over the feeding guide roller assembly, a longitudinal shearing roller, an anti-oxidation coating mechanism located under the longitudinal shearing roller, a partition conveying roller and a leveling pressure roller located over the partition conveying roller. By means of the automatic sheet longitudinal shearing unit guide roller, the anti-oxidation coating mechanism is arranged so that oxidation and discoloration of a copper strip shearing place can be effectively prevented, and burrs and scratch marks generated by copper scales and other pollutants at the copper strip shearing place can be avoided; and a cotton brush roller has a cooling effect on a disc knife, so that the thermal wear of the disc knife is reduced, and the service life of the disc knife is prolonged.

The invention discloses a hot forging die for a cutting sheet. The hot forging die comprises a forging die, a hot forging containing cavity, an oil passage and an oil groove, the forging die is provided with the hot forging containing cavity matched with a rotor punching piece, a plurality of transverse oil passages and longitudinal oil passages are formed in the forging die, the plurality of transverse oil passages and longitudinal oil passages are connected in a staggered way to form the oil passage, the annular oil groove is arranged in the forging die, the oil groove is arranged around thehot forging containing core and communicated with the oil passages, a plurality of oil groove branches are arranged between the oil groove and the hot forging containing core, and a plurality of cooling holes are formed in the forging die. The hot forging die has the advantages that the structure is simple, through the mutual cooperation of the oil passage and the oil groove, the lubricating oilto pass through and flow in the hot forging containing cavity, the degree of hot wear and crack damage of the forging die is reduced, the lubrication and cooling effects are obvious, the service lifeof the mold is effectively prolonged, the product precision is ensured, and the cost is low.

The invention discloses a heat treatment process for a self-tightening nut and a self-tightening gasket. The heat treatment process comprises the following steps of 2.1, material forming; 2.2, charging; 2.3, quenching treatment; and 2.4, tempering treatment. The heat treatment process of the self-tightening nut and the self-tightening gasket has the advantages of high temperature resistance, wearresistance and high hardenability.

The present invention relates to a coupling arrangement for an idler roll line in a continuous caster. The coupling arrangement comprises at least a first component adapted to be arranged in connection with a first roll body of the idler roll line and a second component adapted to be arranged in connection with a second roll body of the idler roll line. The first component and the second component, respectively, are rotatably moveable about a central axis. The coupling arrangement is switchable between a locking state, allowing for synchronized rotational motion of the first component and the second component about the central axis, and a releasing state, allowing for relative rotational motion between the first component and the second component about the central axis. The present invention also relates to an idler roll line comprising the coupling arrangement. The coupling arrangement allows for improved service life and reduced down-time.