217results about How to "Improve straightness" patented technology

The invention relates to the technical field of copper rod machining, in particular to a copper rod straightening device and a working method.The copper rod straightening device comprises a first fixing plate, a second fixing plate, a third fixing plate, a first straightening assembly, a second straightening assembly and an adjusting assembly which are sequentially arranged in the copper rod conveying direction, and each straightening assembly comprises a moving plate, a sliding rail, a support and a round roller; the support is connected with the fixing base through the connecting rod, the bottom of the fixing base is connected with the sliding block, the round rollers are distributed in the circumferential direction of the copper rod, all-directional supporting and straightening force applying are conducted on the copper rod, the uniformity of straightening force is guaranteed, the adjusting assembly synchronously drives the movable plate to move through positive and negative threads of the adjusting rod, the fixing base is driven to be adjusted along the sliding rail, and the round rollers synchronously get close to or get away from the copper rod. Synchronous movement of the movable plate is achieved through the positive and negative threads of the adjusting rod, the multiple fixing bases are driven to move synchronously along the sliding rails, the multiple round rollers are controlled to be close to or away from each other synchronously, linkage adjustment and uniform stress of the multiple round rollers in all directions are achieved, and the straightness and straightening efficiency of the copper rod are improved.

The invention relates to the technical field of aero-engines, in particular to a weak-rigidity welding casing blade bending deformation control method which mainly comprises the following steps: firstly, setting the steps of performing electron beam welding on a blade, an inner casing and an outer casing: positioned welding, penetration welding and modification welding; then setting the electron beam welding sequence of strip welding seams between the blade and the inner casing as well as between the blade and the outer casing as the third welding seam, the fourth welding seam, the first welding seam and the second welding seam; and finally, the electron beam welding step in the first step is executed on the four welding seams according to the electron beam welding sequence determined in the second step. According to the mechanism of generation of welding buckling deformation, the welding buckling deformation of the blade is compensated by setting the steps of weak-rigidity cartridge receiver blade electron beam welding and setting the welding sequence, the straightness of the cartridge receiver blade is controlled, meanwhile, the influence on stress concentration parts such as a blade body anti-icing groove hole is reduced, the probability of fatigue cracks is reduced, and the service life of the cartridge receiver blade is prolonged. Therefore, the service life of the engine case is prolonged.

The invention provides an extrusion processing method of a niobium-tungsten alloy cast ingot and a niobium-tungsten alloy extrusion processing product, the extrusion processing method comprises the following steps: carrying out stepped heating on the niobium-tungsten alloy cast ingot with an anti-oxidation coating by using a medium-frequency induction furnace to obtain a blank to be extruded, the lowest holding temperature of the stepped heating is 800 DEG C + / -20 DEG C, the highest holding temperature is 1200 DEG C-1300 DEG C, and the total duration of the stepped heating is 30 min-45 min; and the blank to be extruded is subjected to non-sheath extrusion machining in the extrusion cylinder, and the niobium-tungsten alloy extrusion machining product is obtained. The non-sheath extrusion processing method provided by the invention has the advantages that the production period is shortened, the production loss is reduced, and the surface quality, the straightness and the processing plasticity of an extrusion processing product are improved.

The invention relates to the technical field of photovoltaics, in particular to a photovoltaic electroforming screen printing plate and a preparing and forming process thereof. The preparation forming process of the photovoltaic electroforming screen printing plate comprises the following steps that S1, a base plate pattern is formed; s2, preparing an electroforming solution; and S3, the substrate is placed in the electroforming solution, and after electroforming integral forming is conducted, demolding treatment is conducted to obtain the photovoltaic electroforming screen printing plate. According to the preparation forming technology of the photovoltaic electroforming screen, the problems that an existing screen needs degreasing, wire drawing and repeated degreasing, the plate making technological process is complex, film typesetting is difficult, the plate making period is long, and the service life is short are solved, so that the preparation forming technology of the obtained photovoltaic electroforming screen is simple, the screen cloth straightness is high, film typesetting is easy, the production cost is low, and the production efficiency is high. And the yield and the wear resistance of the photovoltaic electroforming screen printing plate are improved.

The invention belongs to the technical field of railway engineering mechanical equipment manufacturing, and provides a narrow body flash welding and heat treatment normalizing all-in-one machine and method.The all-in-one machine comprises a static end clamping mechanism, a movable end clamping mechanism, a pressure maintaining and overlap pushing mechanism, a normalizing assembly, a center shaft upsetting structure and a clamp balance oil cylinder; the static end clamping mechanism and the movable end clamping mechanism are distributed at the two ends of the all-in-one machine, the static end clamping mechanism and the movable end clamping mechanism are connected in a penetrating mode through a center shaft upsetting structure, and a pressure maintaining and overlap pushing mechanism and a clamp balance oil cylinder used for providing outward supporting force for a clamp are installed between the static end clamping mechanism and the movable end clamping mechanism. And a normalizing assembly combining rotary mold closing and turnover mold closing is mounted on the pressure-maintaining overlap pushing mechanism. According to the clamp balance oil cylinder, the stability of a welding machine and the straightness of a welded steel rail are improved. The bead pushing tool rest is guided by a central shaft, the rigidity of the bead pushing mechanism is increased, the normalizing assembly adopts a mode of combining rotary die assembly and turnover die assembly, and the requirement for operation in narrow space of a turnout can be met.

The invention relates to the technical field of copper rod straightening, in particular to five-wheel continuous casting copper rod straightening equipment which comprises a conveying cylinder composed of a horizontal part and an arc-shaped part. The shaping unit is positioned in the arc-shaped part of the conveying cylinder and is used for carrying out extrusion and refining treatment on the copper rod; the preliminary straightening unit is located in the horizontal part of the conveying cylinder and used for conducting preliminary straightening treatment on the copper rod; the accurate straightening unit is located in the horizontal part of the conveying cylinder and used for conducting accurate straightening treatment on the copper rod subjected to preliminary straightening; by the adoption of the straightening mode, when the copper rod deforms, enough materials exist on the inner side of the copper rod, the copper rod is allowed to deform, cracks generated when the inner side of the copper rod deforms are avoided, the quality of the copper rod is improved, the straightness of the copper rod can be improved through multi-step straightening treatment, the density of different positions on the copper rod is more uniform, and the quality of the copper rod is improved. And subsequent processing is facilitated.

The utility model discloses a mother rod guide device for preform processing, and relates to the technical field of polarization maintaining optical fiber processing. The material guiding device comprises a material pressing mechanism and material guiding channels symmetrically arranged on the two sides of the material pressing mechanism, the material pressing mechanism comprises a set of inner stand columns, a lead screw mechanism is arranged between the set of inner stand columns, each material guiding channel comprises a set of outer stand columns, and the two outer stand columns are arranged on the same sides of the two inner stand columns respectively. An outer material guiding belt is arranged between the outer stand column and the opposite inner stand column. By designing the novel guiding device, the conveyor belt type material guiding mechanism can be used for stably guiding a mother rod, the guiding stability is high, the straightness is high, meanwhile, the surface of the mother rod cannot be damaged in the mother rod moving process, the quality of a prefabricated rod is ensured, meanwhile, through the arrangement of the material pressing mechanism, force can be actively, stably and efficiently applied, and the production efficiency is improved. It is ensured that the mother rod can be accurately and stably embedded into the side hole of the prefabricated rod, the machining efficiency is high, and the effect is good.

The invention provides a control method for the rolling force of a temper mill and related equipment, and relates to the technical field of metallurgical production, the method comprises the steps that pattern information of strip steel is obtained, and the pattern information comprises width information and thickness information; determining the height of an inlet and the height of an outlet of the anti-wrinkling roller based on the model information; determining the diameter of a working roll based on the model information; determining inlet tension and outlet tension according to the diameter of the working roll; and controlling the rolling process of the temper mill based on the height of the inlet of the anti-wrinkling roller, the height of the outlet of the anti-wrinkling roller, the inlet tension and the outlet tension.

The invention belongs to the technical field of soil sampling, and particularly relates to a soil sampling device for building construction, which comprises a pedestal, two lifting frames are arranged on the end surface of the pedestal, a moving plate is slidably arranged between the two lifting frames, a mounting shell is arranged on the end surface of the moving plate, and a sampling lifting assembly is arranged on the end surface of the mounting shell. The sampling lifting assembly is connected with a sampling rod, an outer barrel is rotationally arranged on the portion, on the bottom end face of the moving plate, of the outer portion of the sampling rod, and a drill bit is arranged at one end of the outer barrel. Large stone particles are prevented from influencing acquisition of soil information; by arranging the sampling rod and the sampling barrel, repeated drilling can be prevented, performance consumption is reduced, meanwhile, the drilling straightness can be improved, repeated sampling is avoided, and then the accuracy of soil collection information is improved.

The utility model belongs to the field of machinery, and relates to a leakage-resistant and heavy-smashing-resistant rubber chain belt which comprises a chain A piece, a leakage-resistant belt, a driving chain and a chain belt structure of a chain A piece, the driving chain comprises a roller chain or an annular chain, the roller chain comprises a driving chain shaft, a chain roller and a chain link plate, and the chain A piece comprises a roller chain A piece or an annular chain A piece. The armor connecting piece chain belt structure is arranged on a driving chain shaft or a chain link plate or a chain armor piece, the chain armor piece, a leakage preventing belt and a driving chain are connected into the chain belt leakage preventing armor anti-smashing belt, the chain armor piece comprises a chain plate strip or an armor belt, the armor belt comprises a chain armor shaft penetrating belt or an armor block and armor block buckling belt, the chain armor shaft penetrating belt comprises an armor block and a chain armor shaft penetrating belt, and the chain armor shaft penetrating belt comprises a chain armor shaft penetrating belt and a chain armor shaft penetrating belt. The chain A penetrating shaft comprises a rigid penetrating shaft and a buffer penetrating shaft, a penetrating shaft hole is formed in the chain A block, the chain A penetrating shaft penetrates through the penetrating shaft hole to connect the chain A block into a chain A penetrating shaft belt, and the leakage preventing belt is connected with the chain A piece through the driving chain shaft or connected with the chain A piece through the chain link plate or connected with the leakage preventing belt and the chain A piece through the driving chain shaft.

The invention provides an engine braking device with a return function and an engine, and belongs to the technical field of automobile parts, and the engine braking device comprises a cam shaft, an auxiliary cam, a braking device and a braking device, a brake rocker arm and a rocker arm shaft, wherein a limiting part is arranged on the brake rocker arm; the movable unit comprises a sliding part and a rolling part; the rocker arm support is provided with a first connecting part; one end of the return spring bracket is connected to the first connecting part, and the other end of the return spring bracket is provided with a return spring seat; the elastic piece is transversely arranged and is clamped between the return spring seat and the limiting part; when the engine is braked and the rolling part is in contact with the non-working surface, the distance between the return spring seat and the limiting part is minimum; and when the engine brakes and the rolling part is in contact with the working surface, the distance between the return spring seat and the limiting part is maximum. According to the engine braking device, the elastic piece is transversely arranged, so that the overall size of the whole engine braking device in the vertical direction is integrally reduced.

The invention discloses a pipeline welding device for building construction, and relates to the technical field of pipeline welding for building construction, the pipeline welding device for building construction comprises a lifting plate, a square block, a clamp, an elastic telescopic pressing block, an elastic telescopic column, a bottom plate, a flat plate, a vertical plate and a sliding frame, the lifting plate is fixedly mounted at the top of a working plate, and the square block is fixedly mounted at the top of the lifting plate; the clamp is rotationally installed on the face, away from the electric welding device, of the square block, a through groove is formed in the top of the lifting plate, the bottom plate is fixedly installed at the bottom of the through groove, and the fixed end of the elastic telescopic column is fixedly installed at the top of the bottom plate, so that a to-be-welded pipeline can be firmly fixed to a specific position; therefore, the position accuracy of a welding seam is ensured, the welding quality is improved, the aligning gap and the unfitness of butt joint of the pipeline can be accurately adjusted and kept, the pipeline meets the requirements of a welding process, and welding defects are reduced.

The application provides a double-station worktable for CNC, and particularly relates to the technical field of CNC machine tool auxiliary equipment, and comprises a CNC main body, an inner platform and a tool head unit, and further comprises a double-shaft switching mechanism arranged between the outer side of the CNC main body and the inner platform, wherein the double-station worktable for CNC; the double-shaft switching mechanism composed of an X-axis displacement component, a Y-axis displacement component and a sinking fastening component is arranged, so as to solve the defects of the existing technology, such as the jamming misplacement caused by the single guide rail alignment of the multi-station switching, the lack of special connection structure, the non-separation of the carrier and the guide rail during the processing, the vibration transmission affecting the precision, and the like, to realize the cooperative action of the X-direction bearing movement of the jig table, the Y-direction smooth connection and the locking of the processing position sinking, and the double-station switching does not need complex debugging, so that the equipment downtime is greatly reduced, and the processing precision and stability are ensured.

The utility model discloses semiconductor process equipment which comprises a cavity, a gas uniformizing part, a rotating motor, a transmission assembly and a plurality of lifting assemblies, the lifting assemblies are distributed in the circumferential direction of the cavity at intervals, the lifting assemblies are connected with the gas uniformizing part, and the gas uniformizing part is connected with the rotating motor. And each lifting assembly is in transmission connection with the rotating motor through the transmission assembly, so that the rotating motor drives each lifting assembly through the transmission assembly to drive the gas uniformizing piece to do lifting motion relative to the cavity. According to the semiconductor process equipment, the problem that the gas uniformizing piece in the current semiconductor process equipment is easy to incline in the lifting process, so that the normal process is unfavorably influenced can be solved.

The invention discloses a cotton spinning process for producing worsted pure wool yarns, and relates to the technical field of cotton spinning processes, which comprises the following steps: step S1, wool raw material screening and wool top cutting technology, step S2, wool fiber health treatment, step S3, wool top preparation, step S4, spinning process optimization, and step S5, wool fiber moisture regain control in the spinning process. Wool fibers selected by the wool raw materials are one of merino wool, Kastell wool, Toska wool, Buddha wool and northern Spanish wool, and the wool tops are cut by cutting the wool fibers into 40-45mm in length through a stretch-breaking assembly. The first motor is installed to start and drive the dispersion rod to rotate, the dispersion rod rotates to loosen wool raw materials, the loosen wool raw materials fall into the surface of the conveying belt to be treated, and the functions that the wool raw materials are looser, entanglement among wool fibers is reduced, and meanwhile fiber damage is reduced to the maximum extent are achieved.

The invention discloses a resistance welding machine for welding thin plates, and relates to the technical field of welding machines, comprising a fuselage, wherein a moving platform and a carrier are arranged inside the fuselage, a substrate is arranged above the carrier, a thin sheet is arranged above the substrate, and a welding head is arranged below the moving platform; an extrusion plate 1 and an extrusion plate 2 are respectively arranged on both sides of the substrate, and the outer sides of the extrusion plate 1 and the extrusion plate 2 are both provided with a U-shaped tube and a sliding plug, a transfer tube is arranged at the end of the U-shaped tube, a fixed cylinder is arranged on the outer wall of the transfer tube, and a connecting frame is arranged on the outer wall of the fixed cylinder. In this resistance welding machine, after the substrate and the thin sheet after welding enter the interior of the correction plate, the horizontality and thickness of the correction plate itself, the air pressure inside the vertical cylinder 1 will drive the rack and the gear ring to transmit, thereby causing the friction pad to have a self-rotation effect, effectively grinding the welding burn marks at the welding position, and improving the final welding quality.

The utility model discloses a laser direct writing device. The laser direct writing device comprises a base; the cross beam is connected to the base; the air floating motion platform is arranged on the face, facing the cross beam, of the base, and the air floating motion platform can move relative to the cross beam; the adsorption seat is arranged on one surface, facing the cross beam, of the air floatation motion platform; the first movement mechanism is arranged on the cross beam; the shooting mechanism is arranged on the first movement mechanism, and the first movement mechanism can drive the shooting mechanism to move relative to the cross beam; the second movement mechanism is arranged on the cross beam; the exposure mechanism is arranged on the second movement mechanism, and the second movement mechanism can drive the exposure mechanism to move relative to the cross beam. According to the utility model, air flotation movement along the Y-axis direction and the X-axis direction can be realized, zero friction is realized, a higher line width grade is achieved, the PCB processing precision is improved, the two Z-axis linear motors are adopted to drive the exposure head to move up and down, the precision is high, the straightness reaches 1 [mu] m, and the yaw angle is within 1.5 arcsec; the two Z-axis movement assemblies are adopted to drive the two cameras to move up and down respectively, and the detection efficiency is improved.

The invention relates to an electronic component wiring terminal forming processing device which comprises a support, and a protective cover is fixedly installed on the upper portion of the support. The conveying assembly is fixedly mounted on the bracket; the cutting assembly is fixedly mounted on the bracket; the female die assembly is fixedly mounted on the two side walls of the protective cover; the punch assembly is fixedly mounted at the upper end of the interior of the protective cover; the collecting assembly is fixed on the female die assembly; when a metal plate does not enter an extrusion cavity in the female die assembly, the metal plate is primarily formed through the folding assemblies at the multiple positions, then when the metal plate enters the extrusion cavity in the female die assembly, secondary forming is conducted on the primarily-formed metal plate, and therefore fold strengthening is conducted on the bent position; parallel distribution of the creases is guaranteed, the defective rate of the wiring terminal of the electronic component is reduced, the wiring terminal is separated from the punch assembly through the separating assembly, and the safety problem and the product quality problem in the wiring terminal forming process are avoided.

This invention relates to a method for producing thin-gauge low-density steel sheets using a lap-rolling process. The chemical composition of the steel sheet, by mass percentage, is: C: 0.70–1.20%, Si: 0.10–0.50%, Mn: 16.00–24.00%, P: ≤0.015%, S: ≤0.003%, Al: 7.00–10.00%, Ni: 4.00–8.00%, Nb+Ti: 0.02–0.20%, with the balance being iron and unavoidable impurities. The method includes the following steps: billet preparation, billet compositing, billet welding, compositing billet heating, compositing billet rolling, steel sheet separation, and compositing billet straightening. A low-density steel intermediate billet of a certain thickness and identical length and width is selected as the lap-rolling billet. After welding, thin-gauge low-density steel sheets with a thickness of 3–6 mm and a width of 2000–3500 mm are produced on a medium-thick plate mill. The steel plate has an Fe-Mn-Al-C series composition and a density of 6.90-7.10 g / cm³. 3 The finished steel plate has a yield strength ≥1000MPa, tensile strength ≥1100MPa, elongation ≥20%, and Charpy V impact energy ≥20J at -40℃. The rolled steel plate has good uniformity in shape, thickness tolerance ≤±0.25mm, and flatness ≤4mm / m.

The utility model discloses a photovoltaic solder strip correction device, which comprises a correction seat, a correction pressing plate and an adjusting bolt, the correction seat comprises a correction seat body, one end of the correction seat body is provided with a guide wheel support, the guide wheel support is provided with a photovoltaic solder strip guide wheel, and the other end of the correction seat body is provided with a correction seat mounting plate. A plurality of welding strip carrier rollers are installed on the correcting base body in parallel, a plurality of welding strip pressing rollers are installed on the correcting pressing plate in parallel, the welding strip carrier rollers and the welding strip pressing rollers are arranged in a staggered mode, a plurality of adjusting bolt inserting holes are symmetrically formed in the two sides of the correcting pressing plate, the adjusting bolt inserting holes are through unthreaded holes, and the adjusting bolt inserting holes are connected with the correcting pressing plate. A corresponding adjusting bottom hole is formed in the portion, under each adjusting bolt inserting hole, of the correcting base body, the adjusting bottom holes are inner threaded holes, and the ends of the adjusting bolts penetrate through the adjusting bolt inserting holes and then are connected with the adjusting bottom holes. By means of the mode, bending of the welding strip can be effectively corrected, and the uniformity of product quality is improved.

The present application relates to the technical field of archery equipment, and particularly relates to a metal mixed carbon fiber arrow shaft, which comprises a middle carbon fiber pipe, a head stainless steel pipe, a tail metal pipe and a solid connecting piece, the head stainless steel pipe is arranged at the front end of the middle carbon fiber pipe, the tail metal pipe is arranged at the rear end of the middle carbon fiber pipe, and the two are connected and fixed through the solid connecting piece arranged in the middle carbon fiber pipe, and the outside is wrapped with carbon cloth and is formed through high-temperature curing. The present application adopts a segmented metal mixed structure, replaces a long-size metal inner core with a short metal accessory matched with a carbon fiber main pipe, and greatly reduces the difficulty of straightness control. The thickened head stainless steel pipe effectively bears the impact force, the solid connecting piece is in surface contact with the inner wall of the carbon pipe to disperse the stress, and the service life of the arrow shaft is significantly prolonged. The present application has reasonable structure, low cost and high efficiency, and is suitable for manufacturing various archery equipment.

The invention provides a preparation system and method of a length-diameter-ratio silicon carbide preform for cladding, the system comprises a feeding system, a weaving system, a flexible traction system, an online shape maintaining system and a discharging system which are arranged in sequence, and a core mold is fed through the feeding system and penetrates through the weaving system and the flexible traction system to the discharging system; the weaving system is used for weaving silicon carbide fibers on the core mold; the flexible traction system is used for providing self-adaptive pressing force for the woven core mold; the online shape maintaining system is used for normalizing the external shape of the prefabricated body; the supporting levelness of the flexible traction system, the on-line shape maintaining system and the discharging system for the core mold is consistent. According to the manufacturing system, the feeding system, the weaving system, the flexible traction system, the online shape maintaining system and the discharging system are adopted for supporting the core mold, the core mold can be prevented from generating deflection due to the gravity of the core mold, and then the straightness of the formed prefabricated body is effectively improved.

This invention provides a high-strength and high-toughness seamless steel tube for automotive bumper poles and its manufacturing method. The high-strength and high-toughness seamless steel tube for automotive bumper poles comprises an Fe base and chemical elements dispersed in the Fe base in the following mass percentages: C: 0.08–0.22, Si: 0.1–0.45, Mn: 1–1.8, Ni: 0.1–0.6, Cr: 0.05–1, Ti: 0.01–0.05, B: 0.005–0.02, Cu: 0.05–0.5, Al: 0.015–0.06, Nb: 0.01–0.1, N: 0.005–0.015. The high-strength and high-toughness seamless steel tube for automotive bumper poles of this invention exhibits good comprehensive mechanical properties and high dimensional accuracy, especially good straightness, enabling accurate fit with connecting components.

A kind of copper clad steel grounding wire is used to straightening device, it is related to copper clad steel grounding wire straightening technical field, including mounting plate and the support frame for supporting mounting plate, a group of straightening rollers for extruding grounding wire is rotationally arranged on mounting plate, and once straightening area is formed between two straightening rollers, which can be passed through by grounding wire, first sliding plate capable of sliding along the direction perpendicular to the movement direction of grounding wire is arranged on mounting plate, and another straightening roller is rotationally connected with first sliding plate;Multiple auxiliary rollers are arranged on the side of straightening roller away from the entry of grounding wire, and multiple auxiliary rollers are respectively located at the two sides of grounding wire, so that secondary straightening area is formed between the two sides of auxiliary roller of grounding wire, which can be passed through by grounding wire, multiple second sliding plates capable of sliding along the direction perpendicular to the movement direction of grounding wire are arranged on mounting plate, and second sliding plate is located at the same side with first sliding plate, corresponding second sliding plate is rotationally connected with the side auxiliary roller, and the interval between straightening rollers can be adjusted to adapt to grounding wire of different diameters.

The invention provides a correction jig, a correction method, a rotating shaft cover plate and foldable electronic equipment. The correction jig is used for correcting the straightness of a long-strip-shaped part and is provided with a first groove, and the first groove extends in the first direction; in the second direction, the range of the difference value w1-w1'between the width w1 of the first groove and the width w1 'of the long-strip-shaped part is larger than or equal to 0.05 mm and smaller than or equal to 0.1 mm, and the first direction intersects with the second direction. The correction jig is simple in structure.

The invention discloses low-yield-ratio Q355B structural steel and a production process thereof, and relates to the technical field of steel production, and the low-yield-ratio Q355B structural steel comprises the following chemical components in percentage by mass: 0.10%-0.20% of C, 0.10%-0.35% of Si, 0.60%-1.60% of Mn, less than or equal to 0.030% of P, less than or equal to 0.025% of S, 0.005%-0.020% of Nb, 0.010%-0.030% of Ti, 0.020%-0.050% of Al and the balance of Fe and inevitable impurities.

According to the composite steel wire rope for mine hoisting and the manufacturing method of the composite steel wire rope, the center strand is made of the aramid fibers, meanwhile, the rope core strand formed by twisting the filaments formed by melting and drawing various high-strength fibers is twisted outside the center strand, and the strength and the tensile property of the composite rope core are greatly improved; and the high-toughness corrosion-resistant steel wire rope has good toughness and corrosion resistance, and is suitable for mine environments and high-load applications thereof. Meanwhile, a graphite fluoride coating is arranged outside the inner-layer strand, and a polytetrafluoroethylene coating is arranged outside the outer-layer strand, so that the friction among the inner-layer strand, the outer-layer strand, the filling strand and the special-shaped steel wires during use can be reduced, and the inner-layer strand and the outer-layer strand have excellent corrosion resistance; the inner-layer strands and the outer-layer strands can keep good performance in a severe environment; in addition, through filling of the filling strands and the special-shaped steel wires, the compactness of the steel wire rope is increased, the whole structure of the steel wire rope is firmer, tighter and more pressure-resistant, and the mechanical property of the steel wire rope is improved.

The invention relates to the technical field of oriented silicon steel cold rolling production, in particular to a cold continuous rolling method and equipment for efficiently producing low-temperature high-magnetic-induction oriented silicon steel. According to the method, efficient and stable production of the thin-gauge low-temperature high-magnetic-induction oriented silicon steel can be achieved, and meanwhile the excellent plate shape and the high-magnetic-induction performance are guaranteed; through cooperative control of targeted roll shape design and process parameters, the problems of edge drop and convexity of the steel strip can be accurately regulated and controlled, the strip shape defect easily occurring in the rolling process of the thin-gauge steel strip is effectively avoided, the finished steel strip has excellent straightness, and the rolling quality of the thin-gauge steel strip is improved. A good foundation is provided for smooth proceeding of subsequent procedures and stacking use of final products; meanwhile, by optimizing texture orientation control in the cold rolling process and combining with an efficient inhibitor formed through subsequent nitriding treatment, the magnetic induction intensity of the finished low-temperature high-magnetic-induction oriented silicon steel is remarkably improved, meanwhile, iron loss is reduced, the magnetic performance of the product is more excellent, and the use requirement of power equipment for efficient soft magnetic materials can be better met.

The application discloses a high-frequency pulse compound direct-current precise micro-TIG arc spot welding power supply and a spot welding method, wherein the power supply comprises a first direct-current power supply, a second direct-current power supply, a high-frequency switching circuit and a control system; the second direct-current power supply is connected with the high-frequency switching circuit, and a pulse current output by the switching circuit is superimposed with direct current output by the first direct-current power supply to provide the arc load; and the control system comprises a DSP controller, a driving circuit, a sampling circuit, a fault detection circuit and the like. The power supply can provide high-frequency pulse current for the micro-TIG arc, improve the transient current density of the micro-TIG arc, and greatly reduce the occurrence of defects such as micro-TIG arc anode spot jumping and easy arc breaking, so that the arc current of stable welding can be reduced to 2A, the stability of the micro-TIG arc and the quality of the spot welding joint are obviously improved, and the application range of the micro-TIG arc welding process is expanded. The application can be widely applied to arc welding power supply equipment.

The present application relates to a kind of 900MPa level magnetic yoke steel plate and its preparation method, wherein the preparation method includes rolling blank into steel strip, and the rolling temperature of final rolling is 820~900 ℃;Two-stage cooling process is used to cool the steel strip after final rolling, wherein, the first stage cooling is to cool the steel strip after final rolling to intermediate temperature 650~750 ℃ according to the cooling speed of 20~40 ℃ / S, the second stage cooling is to cool the steel strip to 250~350 ℃ according to the cooling speed of 90~110 ℃ / S;And the steel strip cooled to 250~350 ℃ is treated to obtain 900MPa level magnetic yoke steel plate.The microstructure of the magnetic yoke steel plate prepared by the present application is two-phase structure of ferrite and martensite, and the strength and toughness are better matched;The magnetic yoke steel plate prepared by the present application has good magnetism.