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

The invention relates to the technical field of remanufacturing of automatic transmissions. A conveniently-held left half shaft flange bearing installation tool for remanufacturing of an automatic transmission is characterized by comprising a pushing rod; a knocking section is arranged at one end of the pushing rod, and the diameter of the knocking section is smaller than that of a shaft hole, used for installation of a bearing, of a flange; a receding hole which penetrates through the end surface of the knocking section, extends in the length direction of the pushing rod and allows a left half shaft to be inserted therein is arranged in the pushing rod, and the diameter of the receding hole is smaller than the outer diameter of an inner ring of the bearing; and a handheld rod is arranged at the other end of the pushing rod. By means of the conveniently-held left half shaft flange bearing installation tool for remanufacturing of the automatic transmission, the bearing can be conveniently installed between the left half shaft and the flange, and the problem that in the remanufacturing process of the automatic transmission, the bearing is inconvenient to install on the left half shaft to support the flange is solved.

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 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 relates to a method for predicting the remanufacturing opportunity of mechanical equipment. The failure time of several parts in the mechanical equipment is firstly obtained as sample data, and the median rank method is used to estimate the cumulative failure probability; the least square method is used for parameter fitting to obtain the cumulative failure time The relationship expression of probability and reliability; using the relationship expression of cumulative failure probability and reliability and the reliability expression of two-parameter Weibull distribution, the solution formula of two-parameter Weibull failure rate h(t) is obtained; using h( The formula for solving t) is to solve N(t) according to the formula; construct a remanufacturing timing decision model, substitute N(t) into the remanufacturing timing decision model, and solve the theoretical remanufacturing timing T d ;Compared with theoretical remanufacturing timing T d and recovery time T after mechanical equipment failure b The size determines the timing of mechanical equipment remanufacturing. The invention can reliably predict the timing of remanufacturing, control the failure degree of waste products, and save remanufacturing costs.

The invention belongs to the technical field of remanufacturing of a tunnel boring machine (TBM), and relates to a positioning and detecting device for replacement of a cutter bed of a hobbing cutteron a cutter head of the tunnel boring machine. The provided positioning and detecting device for replacement of the cutter bed of the hobbing cutter on the cutter head of the tunnel boring machine hasa rotating shaft arranged at the center of the cutter head; a horizontal rule is connected to the rotating shaft; a vertical scale line for the standard cutter space of the hobbing cutter on the cutter head of the tunnel boring machine, and a horizontal scale line are marked on the horizontal rule; the positioning and detecting device is also provided with a fake cutter tool for being placed in asquare hole of a cutter box on the cutter head; the two ends of a fake cutter shaft of the fake cutter tool are respectively supported on a left base and a right base; a perforated faceplate is welded on the fake cutter shaft; the lower end of the perforated faceplate is welded at the middle part of the upper end surface of a cutter shaft; a slot is formed in the left lower end of the upper end surface of the perforated faceplate; an ejection lead screw parallel to the left base is welded in the slot; and an L-shaped through hole is formed in the perforated faceplate. The positioning and detecting device ensures the installation accuracy, improves the replacement efficiency of a new cutter bed, and reduces the remanufacturing cost of the cutter head of the TBM.

The invention relates to the technical field of remanufacturing of an automatic gearbox, in particular to a mounting tool with a holding rod for an oil seal with a lip side for remanufacturing of the automatic gearbox. The mounting tool comprises a push rod; one end of the push rod is sequentially provided with a column head, a first convex ring and a second convex ring; the diameter of the column head is smaller than the inner diameter of the oil seal; the outer diameter of the first convex ring is smaller than or equal to the outer diameter of the oil seal; an annular groove containing the lip side is formed in the end face of the first convex ring; the outer diameter of the second convex ring is larger than the outer diameter of the oil seal; the distance between the first convex ring and the second convex ring is equal to the depth that the oil seal needs to be mounted inside a part for mounting the oil seal of the gearbox; the other end of the push rod is provided with the holding rod, and a receding hole for containing a shaft head in a hole of the part for mounting the oil seal of the gearbox is formed in the end face of the column head. The mounting tool with the holding rod for the oil seal with the lip side for remanufacturing of the automatic gearbox can mount the oil seal with the lip side conveniently, and the problem that the oil seal with the lip side is inconvenient to mount in the remanufacturing process of the automatic gearbox is solved.

The invention discloses a reproducing method of a main bearing hole of an engine cylinder block assembly, belongs to the field of engine reproducing technologies, and is characterized in that a combination surface of a main bearing seat of a cylinder block is taken as a reference, an amount of finish of 0.02-0.10 mm is eliminated from the combination surface of the main bearing seat of the cylinder block, and requirements of a form and location tolerance of the main bearing seat of the cylinder block are ensured; a combination surface of a main bearing seat of a crankcase is taken as a reference, an amount of finish of 0.02-0.10 mm is eliminated from the combination surface of the main bearing seat of the crankcase; the cylinder block and the crankcase are assembled together through a main bearing bolt so as to form a cylinder block assembly; each main bearing hole of the engine cylinder block assembly is honed, and honing of the main bearing holes needs to be synchronously carried out so as to ensure each technological requirement of the main bearing holes of the engine cylinder block assembly. The reproducting method has the advantages of simple process, no potential hidden trouble of a brush plating manner, and capability of realizing reproduction of the engine cylinder block assembly with the problem of the size out-of-tolerance of the main bearing holes.

The invention discloses a modular disintegration construction method in a confined and narrow space of a shield machine. The components of the shield machine are sequentially removed, placed on a tunnel transport vehicle, and then transported to the shield tunnel by the tunnel transport vehicle. At the wellhead, it is finally hoisted out by a crane outside the wellhead under the shield. The invention is applicable to the working condition that there is no hoisting hole reserved at the receiving end of the shield tunnel and the conditions for hoisting the shield machine are not available. By placing the disassembled components on the tunnel transport vehicle, the tunnel transport vehicle carries the shield The various components of the tunneling machine go back and forth and go back to the lower wellhead of the shield machine to be hoisted out, which solves the technical and safety problems of the shield machine dismantling and constructing in a confined and narrow space, and realizes the shield machine entering and exiting at the same tunnel entrance . The designed auxiliary anti-moment guide beam movable door crane assists the dismantling of the shield machine, and the hoist on it can move within the range of the transverse and longitudinal beams, and the lifting range is wide, which can meet the lifting and transportation of the components of the shield machine.

The invention discloses a method of eliminating skin wrinkles of a large surface based on a gradient gap die and belongs to the field of techniques of removing skin formation wrinkles. Batch production of high-quality skin can be implemented herein by optimally designing die gaps and manufacturing; the method herein is applicable to the formation of skin parts of various high-intensity materials,particularly manufacturing of titanium alloy skin parts; pressure-pressure stress state is a main cause to wrinkling; gaps are reasonably designed, gradient frictional resistance is utilized to form acontrollable resistance field, and therefore, mobility during plate forming process is limited, the pressure-pressure stress state in plates is reduced, wrinkle removal is achieved, and high-qualityparts with corrugation meeting technical requirements are met. The method herein may be used as a new method to eliminate wrinkles in thermal formation of titanium alloy large-surface skin so as to obtain high-quality parts.

The invention relates to a coal mine scraper conveyor sprocket and a manufacturing process, in particular to a coal mine scraper conveyor combined sprocket and a manufacturing process. At present, the sprockets of scraper conveyors used in coal mines all have an overall structure of two or three rows of teeth. It is suitable for mass production, especially in the installation and use, when a certain tooth of the sprocket is broken or worn abnormally, the entire sprocket must be replaced, resulting in another waste of materials. The coal mine combined sprocket of the present invention is composed of a left end cover, a right end cover, a sprocket tooth block, a shaft sleeve, a positioning bolt, and a nut, and each component is consistent with the overall sprocket structure after production and assembly. In the present invention, the integral sprocket is improved into a combined type, and the tooth-shaped block of the sprocket is changed from the original machining to direct forging, which simplifies the process, improves the utilization rate of raw materials and reduces the remanufacturing cost.

The invention discloses a disassembly technology for remanufacturing a deformation hinge pin of a concrete pump truck. The disassembly technology comprises the following steps that (1) a hole is drilled in the axial center position of the deformation hinge pin and the diameter of the drilled hole is smaller than that of the hinge pin; (2) the method that a jack or a hammer is used for knocking the hinge pin wall after the hole is drilled is adopted, so that the deformation hinge pin is disassembled. When the diameter of the hinge pin is large, the hole is bored after being drilled, so that the hinge pin wall has a soft elastic structure after the hole is drilled. Under the condition that a shaft sleeve and a component body are not damaged, the reuse value of the shaft sleeve is achieved, the remanufacturing cost is effectively reduced, the procedures that the shaft sleeve is installed and welded again, a line is drawn, a shaft sleeve hole is machined are not needed, the production bottleneck is overcome, and the production efficiency is greatly improved.

The invention relates to the technical field of automatic transmission reproducing. A portable tapered roller bearing race mounting tool for reproducing an automatic transmission is characterized by comprising a push rod, wherein one end of the push rod is provided with a tapered shaft head; the taper of the tapered shaft head is equal to that of a tapered roller bearing race; the root part of the tapered shaft head is provided with a pressing ring extending in a circumferential direction of the tapered shaft head; the diameter of the root part of the tapered shaft head is not larger than the internal diameter of the large diameter end of the tapered roller bearing race; and the other end of the push rod is provided with a holding rod. The invention provides the portable tapered roller bearing race mounting tool for reproducing the automatic transmission, which can conveniently mount the tapered roller bearing race; and a problem that the tapered roller bearing race is inconvenient to mount in the automatic transmission reproducing process is solved.

The invention discloses a remanufacturing method for direct laser cladding of failed carburized and quenched parts. The specific steps are: ① surface treatment: surface treatment is performed on the surface of the base body of the failed carburized and quenched parts to keep the surface clean and free of oxide layers; ② Laser cladding: According to the base material, select the cladding material, select the cladding equipment, set the process parameters during cladding, and remanufacture and repair the surface of the treated invalid carburized and quenched parts by laser cladding; ③ Inspection: Crack detection and hardness testing of carburized and quenched parts. Step ② During laser cladding, the remanufactured repair material used is a powder material with a particle size of 150 mesh to 270 mesh; the mass fraction percentage of the components is as follows: C: 0.1~0.17wt.%; Cr: 15~18.5wt .%Mn: 0.3~1.00wt.%; Si: 1.0~1.5wt.%; Mo: 1.2~2.0wt.%; B: 0.8~1.50wt.%; Ni: 1.2~2.0, the balance being Fe. The remanufacturing method of the invention can carry out laser cladding without removing the carburized layer, has no cracks in the cladding layer, and has good forming manufacturability. At the same time, the cladding layer has excellent wear resistance.