37results about How to "Reduce remanufacturing costs" patented technology

The invention provides a method for repairing a microcrack tip on a stainless steel surface by means of nano-particles. The method is suitable for stainless steel with microcracks on the surface. The method comprises the steps that the to-be-repaired microcrack tip on the stainless steel surface is treated; composite powder containing the nano-particles is arranged on the microcrack tip in advance; the composite powder and a part of a matrix are fused by means of lasers; the repaired microcrack tip region is finished; and the fracture property of the stainless steel matrix obtained after repairing is detected, and the microstructure of the section of a repair layer is observed. The repairing method is high in flexibility, and repairing can be carried out many times; and meanwhile, the problems of large deformation, a large heat affected zone and the like in a conventional method are avoided in the repairing method. According to the repairing method, the microcrack tip is closed again, the matrix and the composite powder arranged on the microcrack tip in advance are in metallurgical bonding, and the defects of cracks, pores and the like do not exist in the bonding region; grains of the repair layer of the microcrack tip are refined, and the structural compactness is improved; and in addition, the fracture property generated after repairing is remarkably improved.

The invention provides a rapid remanufacturing method of a continuous casting machine roller. The method comprises steps as follows: the continuous casting machine roller is subjected to unilateral turning; submerged arc surfacing is performed; machining replication is performed; roller surface polishing and cleaning are performed; magnetic particle flaw detection and ultrasonic flaw detection areperformed; the continuous casting machine roller is coated with an oil film; the oil film is coated with alloy powder; an alloy powder coating is subjected to laser scanning, and a clad alloy layer is formed; surface dye penetrant inspection is executed; the qualified continuous casting machine roller after inspection is the remanufactured continuous casting machine roller. According to the method, the alloy powder is sprayed to the continuous casting machine roller, the alloy clad layer is formed on the surface of the roller with the laser cladding technology, so that remanufacturing of thecontinuous casting machine roller is realized, the service life of the roller can be prolonged, service efficiency can be improved, and cost of an iron and steel enterprise can be reduced; the methodhas the advantages of simple technology, high controllability, energy-saving and environment-friendly performance, low cost and the like.

The invention relates to the technical field of pipe jacking construction and in particular relates to a receiving-free well pipe jacking machine and a complete recycling method thereof. A jacking direction of the pipe jacking machine is set to be a front side and a recycling direction of the pipe jacking machine is set to be a rear side; the pipe jacking machine is provided with a machine body ofthe pipe jacking machine and a supporting beam which is fixedly connected to the rear part of the machine body of the pipe jacking machine; the supporting beam is provided with a slippage oil cylinder; the slippage oil cylinder is provided with a slippage seat; the slippage seat moves in a front-rear direction along the supporting beam along the action of the slippage oil cylinder; the slippage seat is provided with a spreading shoe oil cylinder; the spreading boot supporting oil cylinder is provided with a spreading shoe; the spreading shoe is supported or gets far away from a pipeline underthe action of the spreading boot supporting oil cylinder. According to the receiving-free well pipe jacking machine and the complete recycling method thereof, provided by the invention, the pipe jacking machine can be completely recycled and the recycled pipe jacking machine can be used again; furthermore, when obstacles, which cannot be removed, are met at the front side in a pipe jacking and tunneling process, a vertical shaft does not need to be dug in front of the pipe jacking machine and the pipe jacking machine can be recycled firstly; after the obstacles at the front side are removed,jacking work is carried out again.

The invention discloses a modular disassembly construction method for a shield tunneling machine in a closed narrow space. The modular disassembly construction method comprises the steps that components of the shield tunneling machine are sequentially disassembled and placed on a tunnel transport vehicle, then the components are transported to a shield lower wellhead through the tunnel transport vehicle, and finally the components are hoisted out through a crane outside the shield lower wellhead. The modular disassembly construction method is suitable for the working condition that a reservedhoisting hole does not exist in the receiving end of a shield tunnel and the hoisting condition of the shield tunneling machine is not met, the disassembled components are placed on the tunnel transport vehicle, the tunnel transport vehicle drives the components of the shield tunneling machine to go back to the shield lower wellhead to be hoisted out, the technical problem and the safety problem of disassembly construction of the shield tunneling machine in the closed narrow space are solved, and the shield tunneling machine enters and exits from the same tunnel portal. The designed bending-moment-resistant guide beam movable type gantry crane for assisting in disassembly of the shield tunneling machine is used for assisting, a winch on the gantry crane can move within the range of transverse and longitudinal beams, the hoisting range is wide, and hoisting of the components of the shield tunneling machine can be met.

The invention relates to the technical field of die steel, in particular to high-strength die steel and a high-strength die steel remanufacturing method. The remanufacturing method comprises the following steps that a plurality of micro-nano grooves are formed in the surface of the high-strength die steel; metal nanoparticles are solidified into the multiple micro-nano grooves, and a transition bottom layer is formed on the surface of the high-strength die steel; iron-base alloy powder is fused on the transition bottom layer to form a fusion covering middle layer; and an outermost protection layer is arranged on the fusion covering middle layer, and at least one of silicon nitride and silicon carbide is contained in the outermost protection layer. According to the remanufacturing method, the high-strength die steel remanufacturing quality can be guaranteed, the high-strength die steel can be used in serious working environment, and the application scope of the high-strength die steel is enlarged; in addition, the remanufacturing cost of the high-strength die steel can be reduced, energy consumption is reduced, and the production efficiency is improved; and the corrosion resistancecan be improved, the material residual stress and brittleness are reduced, and the service life of the die steel under various working conditions is prolonged.

The invention discloses a re-manufacturing method for direct laser cladding of a failed carburized quenching piece. The method comprises the following specific steps that (1), surface treatment is carried out, specifically, surface treatment is performed on the surface of a base body of the failed carburized quenching piece, so that the surface is kept clean and is free of an oxide layer; (2), laser cladding is carried out, specifically, according to a matrix material, a cladding material is selected, a cladding device is selected, process parameters during cladding are set, and laser claddingre-manufacturing repair is carried out on the surface of the treated failed carburized quenching piece; and (3), inspection is carried out, specifically, crack detection and hardness detection are carried out on the carburized quenching piece. When the laser cladding is carried out in the step (2), the used re-manufacturing repair material is a powder material and has a particle size of 150 meshes to 270 meshes; and the repair material comprises the following components of, in percentage by mass, 0.1 wt.%-0.17 wt.% of C, 15 wt.%-18.5 wt.% of Cr, 0.3 wt.%-1.00 wt.% of Mn, 1.0 wt.% -1.5 wt.% ofSi, 1.2 wt.%-2.0 wt.% of Mo, 0.8 wt.%-1.50 wt.% of B, 1.2 wt.%-2.0 wt.% of Ni, and the balance Fe. According to the re-manufacturing method, laser cladding can be carried out without removing a carburized layer, a cladding layer is free of cracks, the forming process is good, and meanwhile, the cladding layer has excellent wear resistance.

The invention relates to the technical field of remanufacturing of an automatic gearbox, in particular to a main oil seal mounting tool with a holding rod for remanufacturing of the automatic gearbox. The end face of a main oil seal is provided with an annular groove, and an outer sealing lip is formed on the outer side wall of the annular groove. The main oil seal mounting tool with the holding rod for remanufacturing of the automatic gearbox is characterized in that the tool comprises a push rod; a limiting ring is formed in the outer peripheral face of the push rod; the outer diameter of the limiting ring is larger than the outer diameter of the main oil seal; one end of the push rod is provided with a receding hole and a push ring; the diameter of the receding hole is larger than the inner diameter of the main oil seal; the inner diameter of the push ring is larger than the inner diameter of the annular groove; the diameter of the push ring is smaller than the outer diameter of the annular groove; and the holding rod is arranged at the other end of the push rod. The main oil seal mounting tool with the holding rod for remanufacturing of the automatic gearbox can mount the main oil seal conveniently and accurately, and the problem that the main oil seal is inconvenient to mount and not likely to be mounted in place accurately in the remanufacturing process of the automatic gearbox is solved.

The invention provides a customized laser intelligent rapid deposition method for remanufacturing of a railway train wheel pair, and belongs to the train wheel pair repairing field so as to solve the problems that according to a current manner, the repairing effect is not ideal, the service life is short, and the railway transporting cost is high. The method comprises the steps that a damaged or failure wheel and axle component are subjected to damage situation checking, and the damage failure degree and generation factors are determined; according to the checking result, the part types and materials and the using requirement, the whole life cycle of the components is determined; according to the checking result, the part types and materials, the using requirement and the whole life cycle, alloy materials used for remanufacturing of the components are designed; a to-be-repaired part is thoroughly cleaned, a semiconductor laser machine and a single-arm robot are adopted for depositing the alloy materials to the to-be-repaired part; the single-arm robot guides laser beams to deposit the alloy materials with the speed of 480-800 mm/min; and the remanufactured components are recovered to the original designed and manufactured specification and dimension, nondestructive testing and hardness detection are conducted, and accordingly the technology standard requirement of the components is met.

The invention belongs to the field of remanufacturing disassembling equipment, and relates to an interference fit composite cylinder sleeve disassembling furnace which is used for disassembling a workpiece outer sleeve and a workpiece inner container and comprises a furnace lining, a furnace cover is arranged at the top of the furnace lining, a hearth is defined by the furnace cover and the furnace lining, and the workpiece outer sleeve and the workpiece inner container are arranged in the hearth; a heating element is arranged on the inner wall of the furnace lining, an upper reducing brick and a lower reducing brick are arranged in the hearth, the upper reducing brick is arranged between the workpiece outer sleeve and the furnace cover, the lower reducing brick is arranged below the workpiece outer sleeve, and the inner diameter of the lower reducing brick is larger than the outer diameter of the workpiece inner container; the furnace cover is provided with an air inlet, and the lowerwall of the furnace lining is provided with an air outlet; the air inlet and the air outlet are right opposite to an inner cavity of the workpiece inner container, and a ventilation mechanism is arranged below the furnace lining and comprises a draught fan. The workpiece outer sleeve is heated to expand by a heating method, the workpiece inner container naturally falls off, the workpiece is not easy to damage and can be reused, the remanufacturing cost is reduced, and the safety is high.

The invention relates to a propelling device for a self-propelled tunnel boring machine. The propelling device comprises a self-propelled base plate body, and an upper supporting shoe oil cylinder unit and a lower supporting shoe oil cylinder unit in parallel with the upper supporting shoe oil cylinder unit are installed on the self-propelled base plate body. Supporting shoes are installed on theupper supporting shoe oil cylinder unit and the lower supporting shoe oil cylinder unit, and the supporting shoes on the two sides are symmetrically arranged along the self-propelled base plate body.A telescopic shield and a front shield are sequentially installed on the front part of the self-propelled base plate body, a driving system is installed on the telescopic shield, and a propelling unitis installed between the driving system and supporting shoes on the two sides of the self-propelled base plate body. The propelling device for the self-propelled tunnel boring machine has the advantages that the high tunneling speed can be achieved, an operator is safe away from a working face, the propelling device for the self-propelled tunnel boring machine can adapt to various geologies, thethrust of n oil cylinder is large, and the requirement for low-cost safe and rapid transition can be met through small-range disassembly.