66results about How to "Guaranteed roundness" patented technology

The invention discloses a rapid development method and system for a high-performance nodular cast iron material based on electronic metallurgy, and relates to the technical field of electronic metallurgy, and the rapid development method comprises the steps that a high-performance nodular cast iron raw material is smelted through multi-stage electron beams, and uniform molten metal is obtained; monitoring the chemical components and temperature change of the molten metal in real time, and dynamically adjusting the addition of the spheroidizing agent; the pouring speed and pressure of the molten metal subjected to spheroidizing treatment are intelligently controlled, and casting pouring is conducted; the internal stress change of the casting is monitored in real time through an embedded stress sensor, and the casting cooling process is adjusted; the cooled casting is subjected to surface treatment, heat treatment and machining; component detection and performance testing are conducted on the casting obtained after treatment and machining are completed; through the multi-stage electron beam melting technology, accurate control over the temperature and chemical components of the molten metal is achieved, and the uniformity and stability of the molten metal are ensured.

The invention relates to an ultra-long air valve alloy and a grinding method and device thereof, and belongs to the technical field of air valve alloy manufacturing. The method comprises the steps that a feeding table and a discharging table are placed on the left side and the right side of the centerless grinding machine correspondingly, and supporting devices used for fixing the air valve alloy are arranged on the sides, away from the centerless grinding machine, of the feeding table and the discharging table correspondingly; the air valve alloy sequentially passes through a feeding table, a centerless grinding machine and a discharging table and is fixed through the supporting device; grinding the air valve alloy by using a centerless grinding machine, wherein the grinding process comprises a rough grinding procedure and a fine grinding procedure which are sequentially carried out; the rough grinding procedure comprises a first rough grinding procedure and a second rough grinding procedure which are sequentially carried out; the grinding amount of each time of grinding is controlled to be the same, it is guaranteed that fluctuation generated by air valve alloy in the grinding process is relatively small, and roundness and straightness are guaranteed. And finally, accurate grinding treatment is conducted, and it is guaranteed that the surface quality and roughness of the air valve alloy meet the requirements.

The invention provides an elastic damping wheel set and a carrier. The elastic damping wheel set comprises an elastic seat, the elastic seat comprises an outer pipe and an inner pipe, the outer pipe and the inner pipe are integrally connected through a plurality of spokes, and a hollow hole is formed between every two adjacent spokes; the wheel body is coaxially provided with a shaft assembly, the shaft assembly penetrates through the inner pipe and is assembled with the inner wall of the inner pipe, and the wheel body has the rotational degree of freedom relative to the elastic seat; and the supporting arm is connected with the outer wall of the outer pipe, and the supporting arm can be assembled to a carrier. The elastic seat does not rotate, the wheel body rotates, the elastic seat participates in elastic buffering, and the wheel body participates in rolling. Therefore, the wheel has the advantages of elastic buffering and low rolling resistance at the same time, and the elastic buffering can cope with vibration of the wheel body in all directions.

The utility model relates to the technical field of transformer winding, in particular to a high-precision block-shaped adjustable mold which comprises a mold shaft and a winding plate, guide sleeves are sleeved on the front section and the rear section of the mold shaft, supporting mechanisms for adjusting the winding diameter are sleeved on the guide sleeves at intervals, each supporting mechanism comprises a supporting plate, a supporting rod and a sliding disc, and the supporting plates are vertically fixed on the inner side of the winding plate. Inclined moving grooves are formed in the side surfaces of the supporting plates; the sliding discs sleeve the guide sleeve at intervals, the supporting rods are fixedly arranged around the edges of the sliding discs, the outer ends of the supporting rods slide along the moving grooves, the winding diameter is adjusted through the supporting mechanism, compared with a traditional hinge rod connecting structure, fit clearance and tangential tension do not exist, force transmission is more direct, and the overall structural strength is greatly improved; the block-shaped molds are arranged on the outer sides of the winding plates at intervals in the axis direction of the mold shaft, the block-shaped molds on the outer sides of the adjacent winding plates are matched in a staggered mode, transition of the coil wound on the adjustable mold is smoother in the winding diameter changing process of the adjustable mold, and the roundness of the coil is guaranteed.

The invention relates to glass for a liquid flash capillary array as well as a preparation method and application of the glass. The glass comprises the following components by mole percent: 80-85% of SiO2; 0.5% to 4% of Al2O3; 4.5 to 8% of B2O3; the sum of the contents of K2O and Na2O is 2-8%; the sum of the PbO content and the CdO content is 1-2%; 1.5%-4% of ZrO2; the sum of the contents of the KFH2 and the K2SiF6 is 1 to 4 percent; 0.2% to 0.5% of BaF2; and 0.5%-1% of CeO2. The technical problem to be solved is how to provide glass with low refractive index, high softening point, good devitrification resistance, good pressure resistance and radiation resistance, so that the glass can be used for preparing the liquid flash capillary tube array.

The utility model relates to gas pipe correction technical field especially, it relates to a kind of PE gas pipe correction clamp, solve the problem that the pipe wall is prone to local indentation, flattening or stress concentration, and new plastic deformation is easily caused in the clamping area of pipe body when only applying correction force from outside in prior art due to the certain flexibility and elasticity of PE material.A kind of PE gas pipe correction clamp, including frame, both sides of frame are fixedly connected with side plate, and the opposite side of two side plates is equipped with arc clamping plate, and the bottom of two arc clamping plates is slidably connected between the bottom of frame, both sides of frame are equipped with support rod, and the one end of two support rods is respectively through both sides of frame.The utility model effectively solves the problem that pipe wall is prone to flattening, indentation or uneven stress due to lack of inside support in existing correction clamp, realizes the simultaneous support and uniform stress of inside and outside of PE gas pipe.

The utility model relates to the technical field of power cables, and provides a cable, which comprises a plurality of cable cores, fire-resistant filling units, an inner protective layer, a metal armor layer and an outer protective layer, the plurality of cable cores are arranged inside the inner protective layer, and the fire-resistant filling units are filled between two adjacent cable cores and between the cable cores and the inner protective layer; the metal armor layer is arranged between the inner protective layer and the outer protective layer; wherein the inner protective layer comprises a fireproof layer, and the outer protective layer comprises a piece made of a low-smoke high-flame-retardant halogen-free polyolefin material. The cable provided by the utility model is good in flame-retardant and fire-resistant performance, can normally operate in case of fire, prolongs the operation time of the cable, and is high in safety and environment-friendly.

A processing method of eccentric tailstock sleeve, first step, blanking allowance, second step, rough turning to get sleeve blank; third step, high temperature aging treatment to sleeve blank, fourth step, milling right end as eccentric circle φA1 as process chuck and right end step hole φB visible light; fifth step, rough turning eccentric circle φA1 and step circle table φD allowance; sixth step, rough boring left end step circle table φD allowance, get sleeve semi-finished product; seventh step, sleeve semi-finished product heat treatment; eighth step, rough grinding eccentric circle φA1 allowance, ninth step, rough boring left end hole φC, step hole φB and length L allowance; tenth step, semi-fine grinding eccentric circle φA1 and step circle table φD outer circle, end face; eleventh step, low temperature aging treatment, twelfth step, fine grinding eccentric circle φA1 to design size range, grinding step circle table φD outer circle and end face to design requirement; thirteenth step, fine boring step hole φB, hole φC to design size, get eccentric tailstock sleeve finished product.

The utility model relates to the technical field of hot rolling, and provides a hot rolling device. The hot rolling device comprises a hot rolling unit and a conveying unit, the hot rolling unit comprises hot rolling elements and a hot rolling unit shell, the hot rolling elements are rotating bodies, the hot rolling elements are rotationally installed in the hot rolling unit shell, and two sets of hot rolling elements are distributed in the hot rolling unit shell. The hot rolling elements are rotationally connected in the hot rolling unit shell in parallel, an angle of 45 degrees is formed between the hot rolling elements and the moving direction of a pipe, the conveying unit comprises conveying blocks and a conveying belt, the conveying blocks are evenly distributed on the conveying belt, and positioning grooves are formed in the conveying blocks. According to the hot rolling device, the roundness error caused by abrasion can be transferred to the diameter size of the pipe, the roundness of the pipe is guaranteed to the maximum degree, and the product quality is improved.

The invention discloses metal ceramic spraying powder and a preparation method thereof, and relates to the technical field of metal ceramic powder spraying materials. The metal ceramic spraying powder comprises one or more of titanium carbonitride, titanium carbide and titanium nitride; the metal ceramic spraying powder disclosed by the invention is uniform in component and has excellent sphericity, so that the spraying powder is good in flowability, and an obtained coating is good in stability; the coating formed by the spraying powder and the matrix metal surface layer is high in binding force, the advantages of corrosion resistance, high temperature resistance, low porosity, high density, high red hardness and the like are also achieved, and the preparation method is simple, easy to implement, low in cost and easy for mass production.

This invention relates to the field of machining fixture technology, specifically to a rapid clamping device for preventing deformation of thin-walled parts. The device includes a base plate with four support columns on its top side wall. The outer side walls of the four support columns are fixedly connected to the same support plate. The support plate has two sliding strips at its top. One side wall of the support plate has a guiding mechanism for guiding the part. The outer side walls of the support columns are slidably connected to a clamping and positioning mechanism for holding and positioning the part. This rapid clamping device for preventing deformation of thin-walled parts employs an integrated design with the guiding mechanism and the clamping and positioning mechanism working in tandem. The guiding mechanism can precisely and quickly transport the thin-walled part to the designated workstation via transmission. The limiting block and the flipping plate work together to prevent offset and slippage during part transport, ensuring accurate part transport posture.

The utility model provides an outer circle size and roundness trimming forming cutter which comprises a rotating block, a circular groove is formed in the rotating block, a guide shaft concentric with the circular groove is arranged in the circular groove, a plurality of sets of cutting tool bits are fixedly arranged on the inner circle face of the circular groove, and the cutting tool bits are arranged on the inner circle face of the circular groove. The cutting tool bits are evenly arranged at intervals in the circumferential direction of the circular groove with the guide shaft as the center, and gaps are formed between the cutting tool bits and the guide shaft. According to the utility model, the excircle size and the same roundness of the injection molded part can be trimmed, and the production qualification rate is ensured.

The invention relates to the technical field of plastic production cooling, in particular to an efficient cooling device for plastic bucket production, a pushing structure is used for pushing a plurality of positioning blocks to move, and a plastic bucket placed on a positioning disc body is positioned; a first lifting air cylinder of the shaping assembly is fixed to the upper portion of a positioning disc body, a supporting rod is fixed to the lower portion of a lifting plate, a plurality of parallel rotating rods are rotationally arranged on the supporting rod, a plurality of vertical supporting plates are rotationally connected with the parallel rotating rods correspondingly, and a pulling structure is used for driving the parallel rotating rods to rotate. The cooling assembly comprises an internal cooling spray head set and an external cooling spray head set, the heat exchange efficiency is remarkably improved through simultaneous action of the internal and external spray head sets, and the problem of shrinkage deformation in the plastic cooling process is effectively solved by actively supporting the inner wall of a bucket through an internal supporting plate and cooperating with clamping of an external positioning block; and the size precision and the roundness of the product are ensured.

The utility model relates to a bending pipe auxiliary tool technical field especially relates to a manual tool for metal conduit big bending radius processing, the utility model discloses disc and rotary support structure are equipped with on the upper portion of bottom plate through shaft A, washer and gasket, and can rotate freely around shaft A, be provided with gyro wheel subassembly on rotary support structure, sliding support subassembly is assembled on the bottom plate, and is located disc one side, and the conduit passes through sliding support subassembly and is supported by sliding support subassembly, and the front end of conduit is placed between disc and gyro wheel subassembly and is clamped by both, and rotates rotary support structure and drives conduit to rotate with disc and completes bending work, the utility model discloses technical scheme solves the problem that the existing bending pipe machine in prior art cannot realize the conduit with too big bending radius, and the bending pipe machine manufacturing cost is high, and the bending pipe object is single.

The present invention discloses an intermittent prefabricated overhead insulated pipe and a manufacturing method thereof, which relate to the technical field of long-distance steam transportation; the insulated pipe comprises a core pipe, an inner lining layer and an outer protective pipe, and a plurality of hard insulation sections and soft insulation sections arranged between the inner lining layer and the outer protective pipe, the hard insulation sections and the soft insulation sections are wrapped on the outside of the inner lining layer, and are arranged in a staggered manner along the length direction of the core pipe, and the hard insulation sections and the soft insulation sections are overlapped by insulation materials; an organic insulation layer is arranged on the inside of the outer protective pipe, and the organic insulation layer is used to tightly wrap the hard insulation sections and the soft insulation sections inside it together. By implementing this technical solution, the manufactured insulated pipe can achieve the effect of bearing the operating load of the heating network and taking into account the insulation function, and has excellent insulation performance, low thermal conductivity, light weight, which will significantly reduce the energy loss of the thermal network, and be applied in the field of prefabricated overhead steam transportation to achieve safety, stability, high efficiency and energy saving of the entire pipeline network.

The utility model discloses a video cable for a robot with a body, which is characterized in that a first shielding tape is lapped outside a cable core formed by twisting at least two signal transmission core wires and at least two electric energy transmission core wires, a metal braid layer is arranged outside the first shielding tape, a sheath layer is coated outside the metal braid layer, and a second shielding tape is arranged outside the sheath layer. A second shielding tape wraps the outer side of a data wire core formed by twisting at least two signal transmission core wires, each of the first shielding tape and the second shielding tape comprises a base material layer and an aluminum foil layer attached to the surface of one side of the base material layer through a glue layer, and the aluminum foil layer of the first shielding tape makes contact with the metal braid layer in an attached mode. According to the utility model, the anti-interference performance can be improved, the anti-bending performance and roundness of the cable can be ensured, and the shielding of high-frequency and low-frequency signals can be realized at the same time so as to improve the signal shielding range.

The invention discloses a production process of a thin-wall non-magnetic stainless steel multi-step motor shell, which is characterized in that a product is manufactured by blanking a wafer, carrying out primary stretching, carrying out secondary stretching, carrying out tertiary stretching, carrying out quartic stretching, finishing, trimming, stacking and forming, and chamfering, and also discloses manipulator transfer die production equipment for realizing the production process. Aiming at the special configuration, the material characteristics and the thin-wall characteristics of the product, the production process is mainly designed by selecting a proper stretching ratio, a proper stretching gap and the like, and the qualified product meeting the requirement is prepared; the efficiency is improved by manipulator transfer mold production; a stretching die for four times of stretching is matched with a stretching female die through a movable female die insert, the uniformity of a stretching gap can be automatically calibrated according to the thickness and the stress condition of a material in the stretching process, and the inner diameter precision, the roundness and the wall thickness uniformity of a product after stretching are guaranteed; according to the stamping die for stacked material forming, a die assembly boundary is selected at the position of a stacked material plane, and the phenomena of material cracking, extrusion joint marks or burrs and the like after forming are improved.

The utility model discloses a connecting pipe welding anti-deformation device of a small-diameter thin-wall cylinder, which comprises a central block and supporting mechanisms symmetrically arranged at two ends of the central block, a threaded hole is processed on the central block, a screw is screwed into the threaded hole, a conical positioning block is arranged at the end part of the screw, and a positioning block is arranged on the central block. The supporting mechanism comprises a short section and a cross rod located on the center line of the short section, the end of the short section is connected with the center block, a conical push block is arranged at the inner end of the cross rod, the outer end of the cross rod extends out of the short section, an annular block is arranged on the cross rod, and the outer side face of the annular block is in threaded connection with the inner wall of the short section. A plurality of through holes are evenly machined in the circumference of the side wall of the short section, supporting blocks are movably inserted into the through holes, the inner ends of the supporting blocks are attached to the side surface of the conical push block, the outer ends of the supporting blocks are attached to the inner wall of the small-diameter thin-wall cylinder, and springs are arranged between the outer ends of the supporting blocks and the short section. In conclusion, the anti-deformation device has the advantages of being convenient to use, capable of being repeatedly used and good in anti-deformation effect.

A tooling for hot-loading a titanium cylinder, including a support base tooling and a rounding guide tooling installed on the support base tooling; the support base tooling includes: upper and lower support plates of the support base, and an upper support plate pad and a fixed-size plate of the upper support plate of the support base are installed on the upper surface of the upper support plate of the support base; the rounding guide tooling includes: a number of carbon steel support rings of the same size arranged in parallel, each carbon steel support ring is composed of two half rings assembled by a thermal expansion connecting plate, a thermal expansion adjustment block and a thermal expansion adjustment bolt, and a number of guide toolings are installed on the top carbon steel support ring. The present invention performs shape correction on the titanium cylinder during annealing; the roundness of the entire titanium cylinder is ensured by the rounding guide tooling; the coaxiality of the titanium cylinder and the steel core during hot loading is ensured; the end face size of the titanium cylinder and the steel core during hot loading is ensured; the fitting rate between the inner surface of the titanium cylinder and the outer surface of the steel core is ensured; and the rounding guide tooling of the present invention is formed by splicing two semicircles, and has strong versatility.

The invention relates to rapid assembling and adjusting equipment and method for shell circumferential welding. The equipment comprises a bed body assembly, a bed head assembly, a bed tail assembly and a supporting seat assembly. The bed head assembly is fixed at one end of the bed body and comprises a bed head frame, a circle supporting mechanism and a positioning flange; the bed tail assembly can move on the bed body and comprises a bed tail frame and a three-jaw chuck; and the metal shell can be radially expanded by the circle expanding mechanism, so that the circular seam gap and the step to be welded meet the process requirements, and the welding quality and efficiency are improved. The using method comprises the steps that all the sections of the shell are assembled in sequence, circle correction and welding are conducted through the circle supporting mechanism, and continuous assembling and welding of the multiple sections of the shell are achieved. The welding device is suitable for welding of small-caliber long-size metal shells, operation is easy, efficiency is high, and the percent of pass is high.

The invention discloses a welded bearing retainer which comprises a first ring beam, a second ring beam and a plurality of bent window beams, and pocket holes used for installing rotating bodies are formed between every two adjacent bent window beams and the first ring beam and between every two adjacent bent window beams and the second ring beam in a surrounding mode. The bent window beam comprises a bent part as well as a first part and a second part which are symmetrically arranged at two ends of the bent part; first oil passing grooves are formed in one sides, facing the pockets, of the first ring beam and the second ring beam; the sides, facing the pockets, of the first part and the second part are provided with first pressing slopes, each bent part comprises a linear section and bent sections at the two ends of the linear section, the sides, facing the pockets, of the bent sections are provided with second pressing slopes, the sides, facing the pockets, of the linear sections are further provided with oil passing slopes, and oil passing gaps are formed between the oil passing slopes and the rotating body. And the bending section is provided with an arc-shaped bending structure. By adopting the structure, the flowability of lubricating grease can be improved, the lubricating effect of the retainer is improved, the rotating friction loss is reduced, and the durability and safety of the whole bearing structure are improved.

The present application relates to a kind of whole winding forming wind force rotary drum structure and its preparation method, including mould, comprising: intermediate transition structure;Cap type structure, including cap type longitudinal reinforcement and cap type ring reinforcement;Adjustable precision tooling, including: concentric shaft one and concentric shaft two, concentric shaft one and concentric shaft two are connected by flange and intermediate transition structure centering;Two support structures are respectively detachably set on concentric shaft one and concentric shaft two;Multiple sets of adjusting structure are respectively set on concentric shaft one and concentric shaft two, for the adjustment roundness of cap type ring reinforcement;Wherein, cap type ring reinforcement is set on the outside of adjusting structure, cap type longitudinal reinforcement is set on the outside of cap type ring reinforcement, support structure and intermediate transition structure.The present application utilizes cap type structure and intermediate transition structure to form a set of preparation mould, realizes the whole winding preparation of outer cylinder, saves cost, improves preparation efficiency, and improves the mechanical properties of overall structure.

The present application belongs to the technical field of printed circuit board manufacturing, and discloses a method for laser drilling stepped blind via and a printed circuit board. The method sets a stepped sequence of hole diameters of the blind via to be processed; adopts a via processing mode to set different via rates from the outer ring to the inner ring of the hole, thereby forming a stepped via rate distribution; implements stepped via processing; for the smallest hole diameter, a fixed basic via rate is adopted for processing, and on the basis of the via rate of the smallest hole diameter, one more processing ring is added inward, and the processing ring is added inward on the basis of the via rate of the previous hole diameter; and hole type quality is evaluated. The present application reduces processing cost: under the premise of ensuring quality, the processing time is reduced, the equipment operation cost and the labor cost are reduced, and the production efficiency is improved. The process is controllable: the setting of the stepped via rate has clear design rules and parameter basis, facilitating process standardization and quality control.

The invention discloses a high-voltage cable in a new energy electric vehicle and a preparation method thereof, comprising a conductor arranged inside the cable, the conductor being formed by multiple layers of strands being twisted, the strands being formed by a plurality of tinned copper wires being bundled, the direction of the strands being bundled being opposite to the direction of the strands being twisted, and the bundle pitch-diameter ratio being controlled within 20-25 times; a high-temperature resistant 180°C high-tear-resistant mixed silicone rubber insulation layer being extruded outside the conductor, a first high-temperature resistant isolation layer being wrapped outside the high-temperature resistant 180°C high-tear-resistant mixed silicone rubber insulation layer being wrapped, a shielding layer that can also serve as a negative electrode core being wrapped outside the first high-temperature resistant isolation layer in a sparsely wound manner, a second high-temperature resistant isolation layer being wrapped outside the shielding layer, and a high-temperature resistant 180°C high-tear-resistant mixed silicone rubber sheath layer being extruded outside the second high-temperature resistant isolation layer. The cable has the advantages of large transmission capacity, high temperature resistance, flexibility and tear resistance, bending resistance, cracking resistance, and good solvent corrosion resistance.

The application relates to a manufacturing method of a straight-cylinder metal hand mold for producing an impregnated product, which comprises the following steps: stamping a metal plate to obtain a blank left half palm and a blank right half palm, wherein the blank left half palm and the blank right half palm are sequentially provided with a finger section, a palm section and a wrist opening section in the length direction, the wrist opening section is reserved and shaped with a palm straight-cylinder section at a welding connection position; the blank left half palm and the blank right half palm are edge cut along the contour to obtain a left half palm and a right half palm, the left half palm and the right half palm are matched and welded to form a palm part; a metal pipe is cut to form a wrist cylinder part, a wrist straight-cylinder section is reserved and shaped at one end of the wrist cylinder part; and the palm straight-cylinder section of the palm part and the wrist straight-cylinder section of the wrist cylinder part are welded and connected. The palm straight-cylinder section and the wrist straight-cylinder section are welded and connected, the problem of welding section difference between the palm part and the wrist cylinder part can be solved, the true circularity when the palm part and the wrist cylinder part are welded can be ensured, and the production quality can be effectively improved.

The utility model relates to the technical field of ceramic roller processing, in particular to microwave drying equipment for a ceramic roller blank. The ceramic roller blank microwave drying equipment comprises a box body, a microwave drying assembly, a first conveying chain assembly and a second conveying chain assembly. A heating cavity is formed in the box body, and the microwave drying assembly is arranged on the top of the heating cavity. The first conveying chain assembly and the second conveying chain assembly are arranged in the heating cavity, the box body is provided with a feeding port and a discharging port, and the first conveying chain assembly reciprocates between the feeding port and the discharging port. The first conveying chain assembly is rotationally connected with a plurality of supporting rollers. The first conveying chain assembly is rotationally connected with a plurality of rotating pieces, and each rotating piece is fixedly connected with one supporting roller. Each rotating piece is connected with the outer surface of the second conveying chain assembly in a meshed mode. By the adoption of the ceramic roller drying device, the straightness and roundness of the ceramic roller in the drying process can be effectively guaranteed, and meanwhile the distribution uniformity of water in a ceramic roller blank is guaranteed.

The utility model belongs to the field of steel lantern ring machining, and particularly relates to a steel lantern ring manufacturing jig frame which comprises an operation platform, an inner supporting assembly, an outer retaining assembly and a back shore support and is simple in structure, convenient to manufacture and low in cost. When the steel lantern ring manufacturing jig frame is used for manufacturing a steel lantern ring on a construction site, deformation of the steel lantern ring in the splicing and welding process is reduced through preliminary positioning of the inner supporting assembly and combined precise positioning of the outer supporting assembly and the back shore support, and the roundness of a whole finished product of the steel lantern ring is ensured.

The invention discloses a processing method for preparing a titanium welding wire through multi-roller die combined drawing, which comprises the following steps of: 1, rounding a titanium bar, and peeling to obtain a bar to be subjected to roller die drawing; secondly, first-time roller die drawing is carried out, and a first-time roller die bar is obtained; thirdly, primary vacuum annealing is carried out, and a primary roller die bar after vacuum annealing is obtained; fourthly, secondary roller die drawing is conducted, and a secondary roller die bar is obtained; fifthly, third-time roller die drawing is conducted, and a third-time roller die bar is obtained; and sixthly, finished product vacuum annealing and polishing are conducted, and the titanium welding wire is obtained. Initial primary large deformation of the titanium bar is achieved through primary roller die drawing, the stress of the initial primary large deformation of the titanium bar is eliminated through primary vacuum annealing, primary moderate deformation of the titanium bar in the middle process is achieved through secondary roller die drawing, primary small deformation of the titanium bar is achieved through tertiary roller die drawing, and the titanium bar is subjected to secondary vacuum annealing. And the stress is eliminated and the surface smoothness is guaranteed through vacuum annealing of a finished product, so that the titanium welding wire with excellent performance is obtained.

A large-caliber seat ring inner wall processing device and method, comprising an electric vehicle arranged on the ring mouth, a notch is arranged on the electric vehicle, a three-axis servo slide is installed on the electric vehicle, a power head is installed on the moving end of the three-axis servo slide, a milling cutter is installed on the power head, the milling cutter is located in the notch, positioning mechanisms are installed at both ends of the electric vehicle, target balls for use with a laser tracker are arranged on the electric vehicles on both sides of the three-axis servo slide; the positioning mechanism comprises a first electric cylinder and a plurality of guide sleeves installed on the side wall of the electric vehicle, a guide rod is arranged in the guide sleeve, the guide rod and the electric cylinder piston rod are fixedly connected to the sleeve, a box is fixedly connected to the upper end of the sleeve, a second electric cylinder is installed on the box, a shaft rod is assembled in the sleeve, the upper end of the shaft rod is fixedly connected to the second electric cylinder piston rod, and the lower end of the shaft rod is connected to an electromagnet. The present invention is used to solve the problems of large processing errors and low efficiency of the existing inner wall of the ring mouth.