276results about How to "Not subject to wear and tear" patented technology

The invention provides an iron-based powder metallurgy friction material and a preparation method thereof. The iron-based powder metallurgy friction material is prepared from iron powder, copper powder, manganese powder, graphite powder, silicon carbide powder, molybdenum disulfide powder, silicon dioxide powder, aluminum oxide powder and precipitated barium sulfate powder; the system matching effects of an iron alloy matrix, a lubricating component, a solid friction component and the like are developed, and the high-performance iron-based powder metallurgy friction material which has excellent mechanical strength and can be used at a low speed and within a wide pressure range can be obtained. The friction coefficient of the iron-based powder metallurgy friction material is greater than 0.32, while the abrasion loss of the same is less than or equal to 0.0005mm per face at each time.

The invention relates to a macromolecular / metal (metal alloy) composite conductor and a manufacture method thereof. The composite conductor is provided with a skin layer and a core layer, wherein the skin layer is thermoplasticity macromolecular polymer (A), the core layer is a metal alloy (B) with lowi melting point, and the cross section of fiber can be round or irregular. The manufacture method is a complex extrusion method and comprises the steps of preparing a fusant, extruding and postprocessing, wherein a complex extrusion die head is adopted. The composite conductor of the invention has excellent electric conductivity, and the volume specific resistance is 1.0*10<-6>-1.0*100 omega cm. Therefore, the composite conductor can satisfy the requirement on clothes conductors by the clothes industry and can be applied for detective textiles, such as special uniforms, textile soft keyboards, intelligent clothes, intelligent bandages and the like. Because the composite structure of the skin layer and the core layer is adopted, the composite conductor of the invention has excellence in clothes production, has soft handfeel, and can satisfy requirements on color and comfort level by clothes textile in addition to satisfying electric conductivity requirements, and meanwhile, product cost is greatly lowered.

The invention provides a shape detection device and method based on a spiral FBG (fiber bragg grating) sensor array, and the device comprises the spiral FBG sensor array, an FBG demodulator, data collection and shape reconstruction equipment, and display equipment. The device does not need other peripheral auxiliary equipment, is not affected by electromagnetic interference, is good in medical compatibility, does not emit rays, and can achieve the long-distance remote monitoring. Through the spiral configuration of the FBG sensor array, the device can achieve the multi-point deformation detection of a single optical fiber, and forms a quasi-distributed detection system. Through the packaging of the optical fiber on a nickel-titanium alloy filament, the device protects a grating point from being worn, is strong in anti-interference capability, and enlarges the detection range. The device can obtain the shape of a flexible robot in real time, and is high in real-time response. Meanwhile, the device detects the curvature and torsion, is simple in detection method, can be used for the shape sensing detection in a gastroscope, colonoscope and a flexible / soft robot, and plays an important role in the flexible robots in the fields of dibaster assistance, medical rehabilitation and national defense security.

The invention relates to a rotary solid bowl centrifuge with a helical conveyor, in particular to a horizontal decanter solid-bowl centrifuge. A flange plate is provided with a scraper, and is connected to the auger conveyor through a screw; a liquid limit ring is arranged on the end part of a helical large-end cylinder, has a sheet ring shape, and has the outer diameter smaller than the inner diameter of a cylindrical bowl; the middle of the liquid limit ring is provided with a through hole sleeved on the helical large-end cylinder and the liquid limit ring is fixedly arranged on the helical large-end cylinder; and an adjusting plate is fixedly arranged on a large-end cover of the bowl, and is fixedly connected with a blocking plate. The horizontal decanter solid-bowl centrifuge has the characteristics of compact structure, convenience for installation, simple operation and maintenance, good use effect and the like; the scraper can effectively scrape solid-phase particle accumulation, has a good effect, and protects the safety of a seal ring and a bearing; the liquid limit ring contributes to settling fine solid-phase particles to greatly improve the separating performance of the machine; and the adjusting plate with the blocking plate effectively prevents flowing liquid from splashing to a labyrinth seal ring, and the liquid is prevented from being leaked to protect environment. The technology is applied to the horizontal decanter solid-bowl centrifuge.

The invention discloses a metal composite delivery pipe with a polyurethane elastomer lining and a manufacturing method and application of the metal composite delivery pipe. Low-polymer polyhydric alcohol and isocyanate are used as raw materials, and the quantities of the raw materials and the reaction temperature are controlled, so that a prepared polyurethane elastomer is good in toughness and high in strength, and adhesion strength of the prepared polyurethane elastomer and metal is high; resin type adhesive is adopted, the polyurethane lining is tightly combined with the inner surface of a metal pipe by a centrifugal casting process and control of the rotational speed and the casting speed for centrifugal casting, and the adhesion strength is high; and adhesion between the polyurethane lining and the inner surface of the metal pipe is further strengthened by improving a crosslinking effect of the polyurethane lining via after-vulcanization. The manufacturing method of the metal composite delivery pipe with the polyurethane elastomer liner is simple, is low in cost and can be applied to industrial production. The manufactured metal composite delivery pipe with the polyurethane elastomer lining cannot be corroded or abraded by delivered media, and the service life of the delivery pipe is prolonged.

The invention provides an automatic pipe bending machine. The automatic pipe bending machine comprises a machine body, wherein a steel tube conveying rail is arranged on the machine body, a clamping block is arranged at the right end of the steel tube conveying rail, a fixing pillar is arranged on the right side of the clamping block, a bending pillar is arranged at the rear end of the fixing pillar, a rotation plate is arranged at the bottom of the fixing pillar, the fixing pillar is arranged at the center of the rotation plate, the bending pillar is arranged on the edge of the rotation plate, a rotation motor is arranged at the bottom of the rotation plate, the rotation plate is driven by the rotation motor to rotate, and the right end of the steel tube conveying rail is located between the fixing pillar and the bending pillar. The automatic pipe bending machine bends air conditioning pipes through rotation between the fixing pillar and the bending pillar, and loads and clamps the air conditioning pipes through the steel tube conveying rail and the clamping block, automatically performs bending work, retracts the fixing pillar, the bending pillar, the rotation plate and the rotation motor into the machine body when the fixing pillar, the bending pillar, the rotation plate and the rotation motor are not needed to work by arranging a lifting air cylinder, and prevents the fixing pillar, the bending pillar, the rotation plate and the rotation motor from being polluted by dust and abraded due to inattention of workers, and therefore use life of the automatic pipe bending machine is prolonged.

The present invention relates to a safety device for portable tool with a heat engine that is capable of stopping, almost instantly, the operation of said tool after unexpected, sudden, and violent movements, said device including at least one electronic accelerometer (5) enabling the measurement of the acceleration along at least one plane or axis (X, Y, Z), the output(s) of said accelerometer (5) being connected to an electric and / or electronic monitoring means (7), wherein said electric and / or electronic monitoring means consists of an electric and / or electronic management card (7), the latter and the accelerometer being supplied with electric voltage by an electric current generator (9) known per se and actuated by the heat engine, said electric and / or electronic management card being configured to process analog or digital electrical data from the accelerometer and activate a means ensuring that said heat engine stops almost instantly.

A spraying washing machine having a sealed power supply structures comprise an outer cylinder body and an inner cylinder body disposed in the outer cylinder body. The bottom of the inner cylinder body is fixedly connected with a water tank, the water is provided with an upper sealed box and a clockwise water pump and an anticlockwise water pump which are disposed in the sealed box. The bottom of the outer cylinder body is provided with a lower sealed box, a motor, a driving gear, a driven gear and a driving shaft. At least three up electromagnetic induction coils are uniformly arranged along the circumference in the upper sealed box, and the up electromagnetic induction coils are respectively connected with the clockwise water pump and the anticlockwise water pump. Lower electromagnetic induction coils are uniformly arranged along the circumference in the upper sealed box, the number of the lower electromagnetic induction coils is the same as that of the upper electromagnetic induction coils, and an iron core is mounted in each lower electromagnetic induction coil. The spraying washing machine having the sealed power supply structure is simple in structure, easy to manufacture, good in sealing and more safe and reliable, a power supply structure is provided through the principle of electromagnetic induction, so clothes can be effectively protected from being worn.

The embodiment of the invention discloses an artificial stone production system, comprising a stirring device, a material distributing machine, a vibrating device and a pressurizing device, wherein the stirring device is used for evenly mixing raw materials; the material distributing machine is used for distributing the materials according to artificial stone textures; the vibrating device is used for vibrating the distributed materials; the pressurizing device is used for pressing the vibrated materials to form a green body; the stirring device, the material distributing machine, the vibrating machine and the pressurizing device are sequentially connected with one another through a conveyer. The artificial stone production system is applied to the field of artificial stone production; the productive task can be finished according to presetting; particularly, high-quality and high-fidelity simulation artificial stone can be prepared; automatic control can be achieved; the artificial stone production system has the characteristics of being high in production efficiency and high in product percent of pass.

The invention discloses PVC (polyvinyl chloride) double-side compound sound-proof felt and a preparation method of the felt. The PVC double-side compound sound-proof felt is in an A-B-A layered structure; the A-B-A layered structure comprises a PVC heavy layer, and fiber punched felt compounded on the upper surface and the lower surface of the PVC heavy layer. The novel PVC sound-proof felt adoptsa compound structure; a sound-proof component for an air conditioner compressor can be conveniently arranged and quickly mounted; the sound-proof felt can achieve the best sound-proof, noise reduction, damping and shock absorption effects; in addition, the sound-proof felt further has effects of effectively protecting harnesses and copper pipes against oscillation wear and removing abnormal sloshing sound; and the sound-proof felt is environment-friendly and stable in performance. The preparation method is simple, and adopts hot-melt rolling compounding, and the product is free from lamination and has good practicability.

The invention relates to a laser cladding and on-line machining repair method for a roughing mill housing roller positioning groove, and belongs to the technical field of surface modification and equipment repair. Machining equipment comprises a 2500 movable boring and milling machine, an all-solid-state laser device, a mechanical hand, a manipulator, a pneumatic powder feeder, a self-made construction platform and the like. The technological process includes the steps of building the platform, leading in the equipment, adjusting, centering and fixing the equipment, performing rough machining, performing precision measurement for flaw detection, performing laser cladding, performing precision measurement for flaw detection, fine machining, performing precision measurement for flaw detection and tracking to verify the effect. The laser cladding and on-line machining repair method has the advantages that the equipment strength is not affected, hot stress influence during repair welding is avoided, while equipment accuracy is recovered, the outage time can be shortened, and the repair cost can be reduced; a metal base material can be effectively protected from abrasion or corrosion by selecting a repair material, the problem is prevented from occurring again, and the service life of the equipment is greatly prolonged; as only the surface of the base material is melt in a micro mode in the laser machining process, the area of a laser cladding heat affected zone is one tenth that of a heat affected zone of argon arc welding.

The invention provides planting equipment with multicolor supplementing lamps, and belongs to the field of planting equipment. The planting equipment with the multicolor supplementing lamp comprises a support and a controller arranged on the outer side wall of the support, large driven sprockets are arranged at the upper end of the support, large driving sprockets are arranged at the lower end of the support, the corresponding large driven sprocket and large driving sprocket on each side are connected through a transmission chain, multiple suspending rods are horizontally arranged in the support, wherein the two ends of each suspending rod are suspended to the two transmission chains, and multiple cultivation containers are arranged on the suspending rods through suspending ropes in a suspended mode; the equipment is further provided with the long-strip four-color supplementing lamps, and the colors are red, yellow, blue and white respectively; the equipment is further provided with a water supplementing system which can supplement water for cultivated plants; by means of the water supplementing system, the evenness and the stability of plant water supplementing can be achieved, so that not only are water resources saved, but water can be precisely supplemented; the supplementing lamps are capable of evenly supplementing required light for the plants, so that synthesis of chlorophyll and biological enzyme of the plants is accelerated, differentiation of plant cells is promoted, plant growth is accelerated, and the requirements of nighttime even illumination of the plants can be met.

An automatic separator for the antiwear cast balls is composed of machine frame, prismatic drum and drive unit. After the linked cast balls with sprute are loaded in its drum, the drum is driven by motor to rotate while the collesion and friction take place between said cast balls to separate them from each other and grind their surfaces.

The invention discloses a novel full-automatic hot melt adhesive carton sealing machine. The novel full-automatic hot melt adhesive carton sealing machine structurally comprises an automatic cover folding device, a width adjustable left conveying device, a bottom glue pressing mechanism, a carton positioning device, a top adhesive tape barrel mechanism, a height adjusting handle, a lifting frame,a conveying roller, a machine body, a width adjustable right conveying device, an adhesive tape fixing roller, supporting feet, universal wheels, a height adjustable supporting frame and a containingtable. The novel full-automatic hot melt adhesive carton sealing machine has the beneficial effects that the full-automatic carton sealing machine can automatically fold carton folding covers before carton sealing, folding of the left-right folding covers is conducted firstly, then folding of the front-back folding covers is conducted, manual folding is not needed, the labor intensity of workers is relieved, manpower is saved, and the work efficiency is improved; meanwhile, a sealed carton can be uniform and attractive, the quality of the folding covers of the carton can be guaranteed, the modern assembly line operation requirement can be met, and using is safe, stable, convenient and reliable.

The invention discloses an electric hoisting device, which comprises a substrate, a main arm, a cross arm, a hoisting mechanism, a telescopic arm and a rotating main shaft, wherein an electric rotating mechanism is arranged between the substrate and the main arm; the electric rotating mechanism comprises a driving motor I, a speed reducer I, a driving gear, a rotating disk and a gear ring which is fixedly connected with the outer wall of a center hole I of the substrate, the output shaft end of the driving motor I is connected with the speed reducer I, the speed reducer I is fixedly connected with the rotating disk, the lower end of an output shaft of the speed reducer I is fixedly connected with the driving gear, and the driving gear is meshed with the gear ring; and the rotating main shaft is fixedly connected with a center hole II of the rotating disk, and the lower end of the main arm is fixedly connected with the upper end face of the rotating disk. The electric hoisting device can make the main arm automatically rotate and can control the position in real time. The electric hoisting device also comprises an electric telescopic mechanism which can operate the flexibility of the telescopic arm to carry out charging and discharging operation on goods with high difficulty and accurate position according to the distance for charging and discharging the goods.

The shoe has an external sole (2) on which an external flexible upper (10) is disposed. The upper has a vamp (13) and a backer (16) that are assembled by stitching and made of breathable waterproof material that is constituted of a layer made of treated extensible material, another layer constituted by a breathable-waterproof membrane e.g. plutonium (PU) film known under trade description of Sympatex(RTM: Not defined) and a third layer made of polyester or polyamide mesh. Apparent stems (16c, 17) of the upper are covered by a sealing band (18) disposed at the exterior of the upper.

The invention relates to an operation platform for sea exploration, in particular to an amphibious buoyant box type overwater exploration operation platform capable of rotating multi-directionally. The technical scheme includes that the buoyant box type overwater exploration operation platform comprises two buoyant boxes and is characterized in that beam brackets are arranged at centers of opposite surfaces of the two buoyant boxes, a rotating platform is arranged on the beam brackets, the top surface of the rotating platform is connected with the operation platform, opposite sides of the operation platform are connected with positioning piles through hydraulic rods, the operation platform is provided with exploration drill holes corresponding to the middles of the two buoyant boxes, a control table is arranged at the top of the operation platform, and each positioning pile is independently controlled by the control table. The buoyant box type overwater exploration operation platform has the advantages that the operation platform is low in driving power, long in service life, strong in power, low in consumption, high in water aerostation capacity, fine in safety and high in accuracy, only one positioning pile is retained for positioning and fixing when rotation is needed, the operation platform is operated by the control table to rotate around the retained positioning pile, angles are conveniently and rapidly adjusted, the operation platform can amphibiously run, and working efficiency is greatly improved.

The invention provides an underwater rehabilitation training treadmill which comprises a treadmill body, a display screen, a water tank, a water incoming pump, a water draining pump, a display screencontroller, an air pump, a vortex motor, a treadmill motor and a power source module. A caterpillar track for running is arranged in the treadmill body, a vortex nozzle, a bubble nozzle, a water outlet and a water inlet are arranged inside the treadmill body, the output end of the vortex motor is connected with the vortex nozzle, and the output end of the air pump is connected with the bubble nozzle through an airflow pipeline. The underwater rehabilitation training treadmill has the advantages that buoyancy of water is utilized to relieve load of body weight of users on their lower limbs, paralyzed patients with weak lower limb myodynamia are enabled to walk in water for training, and the treadmill is also suitable for patients in the recovery phase of lower limb muscle, arthropathy or bone fracture. Patients needing aerobic training can adopt a mode of walking in water in an acceleration manner, and exercise load can be increased through resistance of the water; underwater exercise can protect knee joints from being worn to achieve the objective of rehabilitation exercise training.

The invention provides an automatic deviation-control system and a method for a gantry crane based on a beidou satellite positioning system. The automatic deviation-control system is used in the gantry crane. The automatic deviation-control system comprises a processor, a controller, a beidou satellite signal receiving plate and at least two beidou satellite antennae, wherein all beidou satellite antennae are fixedly installed on a main beam of the gantry crane, signal output ends of all beidou satellite antennae are connected with signal input ends of the beidou satellite signal receiving plate, signal output ends of the beidou satellite signal receiving plate are connected with signal input ends of the processor, and signal output ends of the processor are connected with signal input ends of the controller. The system cannot be affected facts such as mechanical part abrasion and ageing. Therefore, the system has the advantages that the service life is long, no accumulated error exists and measurement accuracy is high.

An embodiment of the invention discloses a display panel, a data driving circuit thereof, and a display device. The data driving circuit comprises at least one switching circuit. The switching circuit comprises two switching devices. A first switching device transmits a data signal which is received from a data lead wire to a data wire. A second switching device transmits the data signal which is received from the data lead wire to the data wire. When the data signal is in a forward data state, a first control wire starts the first switching device and simultaneously a second control wire starts the second switching device. When the data signal is in a reverse data state, the first control wire starts the first switching device and simultaneously the second control wire stops the second switching device. According to the display panel, the data driving circuit and the display device, the data driving circuit ensures no positive frame charging capability loss of a display panel through driving by a large-size switching circuit, and furthermore ensures negative frame charging capability of the display panel through a small-size switching circuit, thereby realizing an effect of reducing power consumption of the display panel.

The invention belongs to the technical field of lifting devices, and particularly relates to an automatic lifting device for urban sewage pipeline installation. The automatic lifting device for urbansewage pipeline installation comprises a first support plate, a groove is formed in the first support plate, a double-shaft motor is fixedly connected in the groove, and a first screw rod and a secondscrew rod are fixedly connected to two output shafts of the double-shaft motor; threaded sleeves are in threaded connection to the surfaces of the first lead screw and the second lead screw, first fixing blocks are fixedly connected to the top ends of the two threaded sleeves, and connecting rods are rotationally connected to the two first fixing blocks through first pin shafts. According to thedevice, the two output shafts of the double-shaft motor rotate to drive the first lead screw and the second lead screw to rotate, the two threaded sleeves are driven to move oppositely or back to backunder the sliding fit of a sliding block in a first sliding groove, a connecting rod can be driven to ascend or descend under extension and contraction fit of a first telescopic rod, and the height of a fixing plate is convenient to adjust.

The invention provides a manufacturing method of a ceramic chip with fine mold textures. The manufacturing method comprises the following steps: spraying ground glaze on a biscuit; spraying matte glaze; carrying out ink-jet printing and deep ink jet printing; spraying matte transparent glaze; sintering; and finishing. By adjusting the formula and the glazing amount of the matte glaze layer and thematte transparent glaze layer, the problems that a ceramic chip is easy to deform and permeate water can be well solved. According to the invention, the deep ink is utilized to discharge the matte transparent glaze to form the concave mold texture, the texture for jet printing of the deep ink is made by a computer, the texture style processed by the computer can be diversified, and the lines canbe made very fine; the pattern texture is located below the matte transparent glaze layer, and the matte transparent glaze layer can protect the pattern texture against abrasion. Pattern textures anddeep ink textures are processed by a computer in the same design, and the pattern textures and the deep ink textures can be well matched and processed, so that the final presentation effect is more optimized.

The invention relates to the technical field of electronic information, and discloses an electronic information transmitting antenna with a uniform winding function. The antenna comprises a cable box.A winding shaft is rotatably inserted into the lower part of the cable box. A rotating shaft is rotatably connected with the inner cavity of the cable box and is positioned above the winding shaft. Adriven gear is arranged on the left portion of the rotating shaft. The right side of the driven gear is fixedly connected with a guide cylinder connected with the rotating shaft in a sleeving mode. Aguide groove is formed in the guide cylinder. A bearing is fixedly installed on the left wall of the cable box. A guide pipe is fixedly connected with the inner cavity of the bearing. The left portion of the guide pipe is movably sleeved by a sliding sleeve. According to the electronic information transmitting antenna with the uniform winding function, the winding shaft drives the guide cylinderto rotate; the guide cylinder enables a sliding block to reciprocate left and right through the guide groove; the guide pipe and the sliding sleeve are arranged in a matched mode, and bristles with elastic pieces are arranged on the guide pipe in a matched mode; and the effects of evenly winding, protecting a cable against abrasion and conveniently keeping large cleaning strength on a cable are achieved.

The invention discloses a motor-driven elevator rope gripping device capable of automatic resetting, which comprises a main body base, a driving motor disposed at one side of the main body base, and a driving movable plate and fixed plate disposed in the main body base. The motor-driven elevator rope gripping device capable of automatic resetting is characterized in that a spring, guide pillars, a lead screw and a lead screw nut are fixedly disposed between the main body seat and the driving movable plate; the guide pillars are disposed around the lead screw; guide sleeves sleeve the guide pillars; a brake pad is disposed between the driving movable plate and fixed plate; a brake pad baffle plate is disposed on the main body seat, and fixed by means of a bolt; the fixed plate is intended to be separated from a steel wire rope under the action of the lead screw to achieve resetting. The motor-driven elevator rope gripping device capable of automatic resetting is simple in structure, relatively low in cost, and convenient to mount; repair and maintenance of the device can be completed directly in a machine room; the device is driven by the driving motor, and thus has a short stroke with no impact force generated, and is fast in dynamic response and low in operation noise.

The invention relates to a combination electromagnetism explore injure equipment, it includes sensor, its feature is that it also includes bearing installed on the pipe, bar straightener, supporting axle, supporting roller armed with envelope curve rolling curve and sensor supporting, of which supporting axle installed on the bearing, supporting roller installed on the supporting axle, bearing fixed on the dead plate, arc slot set on the bearing and dead plate relative position and dent into bolt fastening, one end of sensor supporting through the through hole of bearing center and connect with the screw-thread hole of the dead plate center, the other end of sensor supporting connect with the sensor which installed between the both sides supporting roller, supporting sleeve covered sensor supporting and dead connect with bearing, transverse hole installed on the supporting sleeve bottom, one end of supporting axle cantilever reeve through the hole. The invention characteristics is that it could improve measurement precision and accuracy, which integrates a entire with explore injure function and straightening function, the invention could be used on the pipe or bar or sheet or section steel straightening machine production line.

The invention provides a laser marking instrument with the automatic correcting function. The laser marking instrument comprises a laser marking instrument main body, a correcting unit and a laser emitting unit, wherein the correcting unit and the laser emitting unit are both mounted on the laser marking instrument main body; the correcting unit is used for correcting the laser emitting unit. The laser marking instrument disclosed by the invention has the automatic correcting function, so that the data obtained in actual surveying and mapping are higher in reference value and practicability, and the measurement precision of the laser marking instrument can be correspondingly improved; furthermore, the laser marking instrument is simple in structure and convenient to operate; the correcting unit can be replaced at any time, so that the practicability of the laser marking instrument can be improved.

A linear compressor resonator system comprises a first press plate, a second press plate and a rotor skeleton located between the first press plate and the second press plate, resonator springs are fixed between the rotor skeleton and the first press plate as well as between the rotor skeleton and the second press plate respectively, and the resonator springs between the rotor skeleton and the first press plate and the resonator springs between the rotor skeleton and the second press plate are equal in number, correspond one to one in position and arrayed coaxially. The invention further discloses a linear compressor. As the resonator springs are coaxially and uniformly arranged, bending deformation, caused by lateral force, of the resonator springs is avoided, the performance of the compressor is ensured, and the reliability of the compressor is improved.

The invention discloses a cold rolling uncoiler guide sleeve repair method and a device thereof. The method comprises the following steps: a worn guide sleeve is dismounted and processed to a proper size, and a tool withdrawal groove and an axial groove are processed; copper sleeves are processed on a lathe to guarantee transitional fit between the copper sleeves and an inner hole of the guide sleeve and clearance fit between inner holes of the copper sleeves and mandrels; after parts are assembled, no-load actions are repeated for several times; and after the actions are stabilized, a steel coil is loaded for trial turning. The device, built according to the repair method, comprises the guide sleeve, the mandrel and a fan-shaped plate; the copper sleeves are respectively embedded in the two ends of the guide sleeve in the axial direction; two clamping parts are symmetrically arranged on outer rings of the copper sleeves; the copper sleeves and the inner hole of the guide sleeve are in transitional fit; and the mandrels are inserted in the inner holes of the copper sleeves, are fixed with the copper sleeves through connecting keys axially arranged on the side walls of the mandrels, and are in clearance fit with the copper sleeves. The repair method and device have the following beneficial effects: the mandrels are not worn; after the service life of the copper sleeves is used up, the copper sleeves with lower cost are only replaced; the maintenance is convenient; the operation is easy; the stock of spare parts is reduced; and funds are saved.