218results about How to "Guaranteed surface roughness" patented technology

The invention discloses an on-site test method for pearlite spheroidization grade of No.20 steel, which solves the problems of damage on work parts, complex test process, higher demand on knowledge level and experience of operators and the like in a conventional metallographical method. The on-site test method provided by the invention comprises the following steps of: mechanically clearing a surface of an objective steel piece, then, mechanically grinding and polishing the surface of the objective steel piece while spraying water, orderly testing the hardness of a same part for 20-40 times by a Leeb hardness tester when the surface roughness Ra is controlled to be not more than 1.6 mum, respectively reading a Brinell hardness number of the same part, and performing data processing on the Brinell hardness numbers obtained after many tests to obtain the pearlite spheroidization grade of the No.20 steel piece, wherein the whole data processing procedure is finished by a computer program. The on-site test method for the pearlite spheroidization grade of the No.20 steel is less in damage to work pieces, simple in test process, simple in used devices, low in demand on the knowledge level and experience of the operators, high in test efficiency and degree of automation, higher in accuracy, excellent in repeatability and the like.

The invention discloses a drilling and interference bolt-inserting integrated device and method. The drilling and interference bolt-inserting integrated device comprises a station conversion module, aspindle module and a bolt-inserting module. The station conversion module comprises a driving mechanism, a double-station connecting plate and a connecting belt mechanism connected between the driving mechanism and the double-station connecting plate; the spindle module is arranged at a first station of the double-station connecting plate and used for drilling and dimpling of wall plate connecting holes; the bolt-inserting module is arranged at a second station of the double-station connecting plate and used for interference bolt-inserting of high-locking bolts; and the driving mechanism of the station conversion module drives the connecting belt mechanism to rotate, so that station conversion of the first station and the second station is achieved. Thus, by adopting the drilling and interference bolt-inserting integrated device, after the to-be-drilled holes are drilled, the station conversion module is rotated by a fixed angle, then the station states of the spindle module and the bolt-inserting module can be switched, thus interference bolt-inserting of the high-locking bolts is completed, and the anti-fatigue property and assembly efficiency are improved.

The invention discloses a machining method for a floating bush of a turbocharger. The machining method comprises the following steps: roughly turning the outer circle and an inner hole; turning the inner hole and the outer circle by a numeric control turn-milling center; drilling three oil inlet holes and an anti-rotating pin hole; milling oil tanks corresponding to the three oil inlet holes; performing finish turning on the outer circle and performing semi-finish turning on the inner hole; chamfering the outer circle and the inner hole of a non-cut end; cutting lengthwise; marking the non-cut end face; turning round; chamfering the outer circle and the inner hole of the cut end; removing all burrs at the orifices; grinding the cut end face; milling the inner hole and the oil tanks; removing all burrs; performing comprehensive inspection. The machining method for the floating bush of the turbocharger guarantees the accuracy of the inner hole, the oil tanks and oil wedge surfaces and improves the production efficiency, so that the machining time is shortened from original 3.93m/piece to 2.35m/piece.

The invention relates to the technical field of machining, in particular to a quick cutter feeding/retreating and constant-pressure feeding mechanism. The mechanism comprises a slideable feeding carriage, a screw speed reducer, a feeding hand wheel mechanism, a buffer device and an air-pressure transmission system; one end of the feeding carriage is connected with the air-pressure transmission system, and the other end of the feeding carriage is connected with a second buffer; the second buffer tightly presses a screw of the screw speed reducer when a cutter enters a machining station; the air-pressure transmission system includes a cylinder and an air-pressure transmission control system; a first buffer is arranged at the head part of a cylinder body of the cylinder; the outer end of a piston rod is rigidly connected with the feeding carriage; the air-pressure transmission control system includes an air compressor, a pressure relief valve, a two-position five-way valve and a one-way throttling valve module connected in sequence; and an input shaft of the screw speed reducer is connected with the feeding hand wheel mechanism. The quick cutter feeding/retreating and constant-pressure feeding mechanism adopts a mode of combining mechanical feeding with the air-pressure transmission system to realize quick cutter feeding and retreating, guarantees repeated positioning precision of quick movement of the feeding carriage, and meanwhile, realizes constant-pressure feeding in cutter machining.

The invention relates to a method for processing a defensive move plate structure. The method comprises the following steps: providing a defensive move plate blank; blanking a defensive move plate; rough milling the two surfaces of the defensive move plate; carrying out fine milling on the defensive move surface of the defensive move plate; and processing the defensive move surface of the defensive move plate to form an uneven structure, wherein a ball head milling cutter is used as a processing tool. By using the processing method provided by the invention, the problems that the uneven structure of the defensive move surface of the defensive move plate is irregular and easy to deform are solved; and the obtained uneven structure of the defensive move surface of the defensive move plate is uniform, and has the advantages of high dimension accuracy and good surface finish quality.

The invention discloses a process for repairing a piston ring groove. The process includes the following steps of firstly, cleaning away carbon deposits and greasy dirt in the piston ring groove; secondly, roughly machining the ring groove before fusion covering so that mesh-shaped lines can be produced, and conducting measuring and grouping on the size of the ring groove in the rough machining process; thirdly, spreading fusion covering materials; fourthly, melting the fusion covering materials through a laser device, wherein a piston uniformly rotates in the process, and meanwhile lasers are controlled through programs so that the irradiation angle and the irradiation range can be ensured and the covering materials and base materials on the same plane can be evenly and effectively combined; fifthly, placing the piston in a well type electric furnace to be heated after laser melting is conducted, and conducting thermal insulation; sixthly, conducting turning on the ring groove; seventhly, conducting fine machining on the ring groove; eighthly, conducting fluorescent magnetic particle flaw detection on the repaired part of the ring groove so that the piston cracking in the fusion covering process can be prevented from being put into use. The piston ring groove which is repaired can completely replace a newly-manufactured piston, the service life of the product is prolonged, and obvious social benefits and economic benefits are achieved.

The invention belongs to the field of additional material and subtractive material composite manufacturing, and concretely relates to a selective laser cladding and grinding in-situ composite manufacturing device. The device is formed by a laser cladding head, a laser cladding head Z-direction moving mechanism, a fine grinding wheel, a rotation B shaft, a grinding head Z-direction moving mechanism, a lathe bed, a forming parts, a first powder supply tank, a powder recovery tank, a powder dust collector, a base plate, a lifting table, a Y-direction moving platform, an X-direction moving platform, a machine tool base, a forming chamber, a protection air source, a powder recycle bin, a powder paving wheel, a second powder supply tank, a control cabinet, a machine tool protection cover and thelike. Two processing methods, i.e. additive material manufacturing and subtractive material manufacturing are integrated on one device, and are used for in-situ composite manufacturing, so that not only can the defects of dimensional accuracy and surface quality in a single additive material manufacturing technology be overcome, but also the restriction of grinding process in parts complexity canbe overcome, and high-efficient precision laser additive material manufacturing of various complex metal parts is hopefully realized.

The invention relates to a kind of cold boring and milling technique to process the foreside axis of the car. The main technique is: locate the two spring steel seats, drill ten holes in each steel board, and drill the holes again with U drilling technology to finish the primary process. Fine the holes and corner, the upper and the under board faces with the boring bed. Only one setting and clumping step is needed to finish the holes process. The invention overcomes the excursion phenomenon by combining the boring and milling technology with three work position machine bed to take the drill-bore-drill-hinge procedure. It limits the warp between the chief pin hole and the locking pin hole. The technology is simple and has high processing precision. So the product is high quality, and needs few device and cost. The production efficiency is high and the work steam intensity between the procedures is low. In addition, it can make sure clean working circumstance.

The invention discloses a Y-shaped power divider manufacturing technology which comprises upper cover plate processing, lower cavity processing and vacuum brazing molding and specifically comprises the steps of S31: mounting an upper cover plate and a lower cavity in trial, and guaranteeing that an edge boss (2) and an edge groove (5) as well as a Y-branch slot convex bayonet (3) and a Y-branch slot concave bayonet (6) are tightly attached; S32: performing pickling to remove impurities; S33: assembling the upper cover plate, the lower cavity and a brazing material; S34: performing vacuum brazing; S35: performing numerical control processing on the appearance of a power divider and a flange disk; S36: drilling and hinging pin holes; S37: performing electrochemical treatment; S38: testing telecommunications parameters. According to the Y-shaped power divider manufacturing technology, the welding deformation caused by multi-time manual flame welding is avoided; the upper cover plate and the lower cavity are positioned by the boss, the groove and the bayonets, so that the size consistency and the precision of the power divider are guaranteed; when the parts such as the boss, the groove and the bayonets are designed, the embedding thickness of a welding sheet is considered; furthermore, a fit clearance is increased to 0.02-0.04mm, so that the flowability of brazing material joint filling is guaranteed during welding, and the cavity size precision of the assembled power divider is guaranteed.

The invention discloses a novel metal diffusion bonding technology. Main steps comprises steps that: two parts on which a bonding metal layer is deposited are packaged in a vacuum sealing soft bag, the vacuum sealing soft bag is then put in a container filled with liquid, the container is connected with a pressure device, pressure generated by the pressure device is exerted on a part needing bonding through the liquid in the container and the vacuum sealing soft bag, temperature rising is further realized simultaneously, so metal diffusion bonding is realized under effects of the temperature and the pressure. The novel metal diffusion bonding technology can guarantee uniform bonding pressure in each direction and does not easily cause rupture damage to a crimping material even under high pressure intensity, so a bonding effect is improved. The exerted pressure is great, so reliable bonding can further be realized even under lower temperature, lowest work temperature can be 80 DEG C, moreover, the novel metal diffusion bonding technology can reduce requirements for technology clamps and physical dimensions of bonding materials.

The invention discloses a valve retainer, which is made of a powdered metal material that comprises the following components in percentage by weight: 0.8 to 1.3 percent of C, 2.0 to 4.0 percent of Cr, 1.0 to 3.0 percent of Mo, 3.0 to 6.5 percent of Co, 0.5 to 2.0 percent of Ni, 0.8 to 1.5 percent of Mns, 0.05 to 0.1 percent of P, 0.2 to 0.5 percent of V, less than or equal to 3 percent of other elements and the balance of Fe. A prevention segregation agent is added into the powdered metal material which can make valve retainer. The valve retainer disclosed by the invention can resist high temperature and wear, and resist the high temperature of over 800 DEG C. In a bench test of more than 300 hours, the valve retainer does not generate segregation, which is favorable for cutting and ensuring the size precision and surface roughness of a cut face.

The invention discloses a processing method of a rolled copper foil mother material, and belongs to a high-precision soft-state red copper belt. According to the method, the conventional flow process for the red copper belt processing is changed from the production flow process, firstly, from cast ingots, high-quality raw materials are adopted for producing the cast ingots with compact tissues and qualified ingredients through semi-continuous casting; after hot rolling cogging, four-side milling is carried out for milling out surface layer scales; then, a rolling machine is adopted for rolling finished products through adopting short-rolling-process and large-processing-rate processing; in addition, the belt material plate type is improved through a stretch bender; next, the annealing is carried out through a gas pad type continuous annealing furnace; and finally, the shearing and trimming is carried out, and the operation turns to a copper foil workshop. The processing method provided by the invention has the characteristics that the conductivity is good, the dimension precision is good, the surface quality is good, the internal tissue is good, the performance is uniform, the plate shape is flat and straight, no burr exists at the edges, and the like. Therefore good popularization and application values are achieved.

The invention discloses a boring and countersunk device of a digit control machine tool, and a boring and countersunk method, which comprises a taper-shank arbor, an internal gear, a satellite gear, a main gear, and a tool bar, and is characterized in that the device also comprises a main bevel gear, an auxiliary bevel gear, a speed reducer and a base; a boring cutter radial driving mechanism is arranged in the base; the automatic boring of a taper hole is realized by inputting the thread pitch value of a digital thread instruction; the boring and countersunk device of the digit control machine tool, and the boring and countersunk method have the advantages of simple structure, high production efficiency, shortened time for processing the taper hole, guaranteed processing precision and surface roughness of the taper hole, and lowered production cost.

The invention provides a perforation processing method for printing substrates, which can effectively utilize laser and a drill bit to conveniently perform perforation processing with high accuracy and high efficiency but is not limited by the overlapping number of the substrates. In the method, after a process (S10) that periphery holes (2) for positioning and fixing are formed at predetermined positions of the periphery parts of the substrates (1) is carried out, a process (S20) that laser is adopted to process blind holes (5) in the substrates (1) at the set positions outside the periphery parts is carried out, and then after a process (S30) that each substrate (1) in which blind holes are processed is alternately superposed to form a workpiece (W) of a superposed body, lamination pins are inserted in the periphery holes (2) of the workpiece (W) of the superposed body, and each substrate is superposed and concentrated (workpiece (W)) is carried out, the process (S40) that a drill bit of which the diameter (expressing the diameter of a hole at the inlet side of the blind holes (5)) is larger than that of the blind holes (5) is adopted to perforate the workpiece (W) is carried out.

The invention discloses a hot stamping forming steel board for restraining falling off of an oxide layer in the hot stamping process and a production method thereof. The hot stamping forming steel board comprises, by weight, 0.19%-0.27% of C, at most 0.50% of Si, 1.00%-1.50% of Mn, at least 0.010% of Al, at most 0.010% of N, 0.01%-0.055% of Ti, at most 0.35% of Cr, 0.0005%-0.004% of B, at most 0.50% of one or more of Mo, W, Cu and Ni and at most 0.10% of one or more of Nb, Zr and V, and the surface roughness of the steel board is 1.1-2.0 microns. The production method comprises the following steps that a, steel board raw materials are obtained according to the elements of the claim 1; b, roughness treatment is conducted; and c, hot stamping forming steel is obtained.

The invention relates to the technical field of machining, in particular to a processing method of a titanium alloy TA15 thin-wall long boss. The processing method particularly comprises the followingsteps: removing the margin of a middle arm, removing the margin of the right side of the boss, removing the margin of the left side of the boss, finish-milling the middle arc, finish-milling the right side of the boss and finish-milling the left side of the boss. The processing method is mainly applied to milling of an axial long boss of the new generation aero-engine titanium alloy TA15 material, the adverse effects of machining deformation of thin part structure wall and long axial size in the processing process of thin-wall guide pipe parts are avoided, the technical bottlenecks of programming of milling processing numerical control program and determination of milling processing process parameters are overcome, and the shape and the size precision requirements of the titanium alloy TA15 material thin-wall long boss parts are guaranteed effectively.

The invention discloses a double strong copper strip production technology for an automobile connector, and belongs to the technical field of a copper strip production technology. The double strong copper strip production technology comprises the following steps of (1), smelting and ingot casting; (2), hot rolling; (3), milling; (4), rough rolling; (5), once annealing; (6), once cleaning; (7), medium rolling; (8),twice annealing and cleaning; (9), finish rolling; (10), three times annealing and cleaning; (11), finish rolling; (12), four times cleaning; (13), leveling; and (14), examining and delivering; and specified thickness of strip coil after rough rolling is 2.5 mm. According to the technical scheme, brass products can meet the double requirements of tensile strength and elongation index of automobile connector industry.

The invention provides a rapid preparation method of a high flatness and low damage single crystal silicon carbide substrate. The method is characterized by comprising steps that fully-solidified abrasive treatment of the single crystal silicon carbide is performed, chemical mechanical polishing treatment is then performed, the high-flatness and low-damage single crystal silicon carbide substrateis obtained, solidified abrasive treatment includes line cutting and grinding wheel grinding, abrasive particles are consolidated on cutting lines, and the abrasive particles are consolidated on a grinding wheel. The method is advantaged in that surface roughness, a scratch die ratio, a pit ratio and bump of the prepared single crystal silicon carbide substrate are relatively low, surface data isgood, thickness deviation is small, curvature is small, and warpage is small.

The invention discloses a processing method of an inner surface and belongs to the field of machining. The processing method comprises: setting a cutting sample on a workbench of a numerical control boring-milling apparatus; processing a test inner surface on the cutting sample according to theoretical parameters, test cutting depth and test cutting length, wherein the theoretical parameters are parameters that allows an inner surface to be processed theoretically on a workpiece under processing, and the theoretical parameters include theoretical tool speed and theoretical feeding speed; measuring actual parameters of the test inner surface; comparing the actual parameters with required parameters; if deviation requirements are met, processing an inner surface on the workpiece under processing according to the theoretical parameters, workpiece depth and workpiece length; if the deviation requirements are not met, correcting the theoretical parameters according to the actual parametersand the required parameters to obtain corrected parameters; processing an inner surface on the workpiece under processing according to the theoretical parameters, the corrected parameters, the workpiece depth and the workpiece length. The processing method provides improved processing precision for an inner surface.

The invention relates to a method for deplating a sapphire plated layer by using a waste polishing solution, belongs to the technical field of glass surface treatment and aims at realizing reuse of the waste polishing solution in an AG (anti-glare glass) process and further ensuring the performance of sapphire after deplating. The invention provides the method for deplating the sapphire plated layer by using the waste polishing solution. The method comprises the following steps: mixing the waste polishing solution produced in the AG process and water to form a mixed solution, and controlling the pH value below 1 for further deplating treatment; soaking the surface-coated sapphire to be deplated in the mixed solution, performing deplating treatment, and cleaning with the water after deplating treatment to obtain a corresponding product. By adopting the method provided by the invention, the reuse of the waste polishing solution is realized, thereby turning waste into treasure, improving economic benefits and further ensuring the crystal purity, the surface roughness and the transmittance of the sapphire after deplating; and furthermore, the process flow is simple and the operation is easy.