55 results about "Necking" patented technology

The utility model relates to the technical field of steel pipe necking, in particular to a steel pipe necking device. The necking device comprises a first shell, a second shell, a necking assembly and an oiling assembly. The second shell is arranged at the inlet end of the first shell. The necking-down assembly is arranged in the first shell and used for conducting necking-down treatment on the steel pipe. The oiling assembly is arranged in the second shell, and lubricating oil is smeared on the steel pipe before necking. The oil coating assembly comprises an oil coating piece which rolls through a plurality of balls and coats lubricating oil on the steel pipe; the oil supplementing part is used for supplementing lubricating oil for the oil coating part; and the pushing and pressing piece is used for pushing the oil storage sponge to extrude the lubricating oil filled in the oil storage sponge to the balls. When a steel pipe passes through the second shell, the multiple balls can be driven to rotate, and therefore lubricating oil stained on the balls is evenly smeared on the steel pipe. A layer of lubricating film can be formed on the surface of the steel pipe, friction force between the steel pipe and the necking module is reduced, and therefore friction loss in the machining process is reduced.

The utility model discloses a steel pipe necking machining device which comprises a machining table, a necking assembly is arranged on the machining table through a fixing plate, a collecting assembly matched with the necking assembly is further arranged below the machining table, a guiding and positioning mechanism is arranged in the middle of the machining table, and a vertical plate is fixedly arranged at the end, away from the fixing plate, of the machining table. The vertical plate is provided with a rotary clamping mechanism through a moving assembly. The steel pipe necking device can conveniently drive a steel pipe to rotate during necking, on one hand, comprehensive and uniform necking can be guaranteed, meanwhile, the necking position can be ground, smoothness of the surface is guaranteed, chippings generated by grinding can be collected, unified treatment is facilitated, and meanwhile cleanliness is guaranteed.

The equipment comprises an equipment frame body and a discharging opening formed in the equipment frame body, a first platform and a second platform are arranged on the surface of the equipment frame body, and the first platform and the second platform are each provided with a feeding supporting piece used for feeding metal pipe materials. A first clamping mechanism is arranged on one side of each feeding supporting piece, pipes which are not clamped can be placed at the upper ends of the first clamping mechanisms, the pipes can be clamped at the lower ends of the first clamping mechanisms, and a second clamping mechanism capable of adjusting the clamping height is further arranged on the surface of the equipment frame. The surface of the first platform is provided with a first pipe opening machining mechanism used for punching, and the surface of the second platform is provided with a second pipe opening machining mechanism used for punching and pipe shrinking. The cutter with the adjustable diameter is adopted, multi-aperture machining is achieved on the same equipment, and the shutdown cutter changing time is shortened. The integrated design breaks through the limitation of traditional step-by-step operation.

Various embodiments of the present disclosure provide a stretch-wrapping machine with at least three pre-stretch rollers sized, positioned, and otherwise configured to minimize necking and slippage as the film is drawn through and stretched by the pre-stretch rollers before the film is applied to the load.

The invention discloses a preparation method of a cyclic reducing high-performance external gradient structure aluminum magnesium alloy pipe blank, and belongs to the technical field of metal plastic processing, the method adopts a cyclic reducing die, and a male die sliding plate vertically descends in a single time to drive a sliding assembly to do horizontal reciprocating motion, so that the pipe blank is subjected to multiple times of diameter expansion-necking circulation. In the expanding stage, the die core and the female die box body are matched to expand the outer diameter of the pipe blank; in the necking-down stage, metal flows directionally under the guidance of a back pressure cavity, large plastic strain is accumulated on the outer side of the pipe wall to achieve grain refinement, strain capacity on the inner side is decreased progressively, an outer gradient structure is formed, and the pipe blank can be subjected to the diameter expanding stage again through vertical upward reset of the male die sliding plate. According to the scheme, geometric forming and external gradient structure construction are synchronously completed in single-pass machining, the forming precision is high, gradient controllability is high, external fine grains of the prepared pipe are resistant to abrasion, internal coarse grains of the prepared pipe are good in toughness, the pipe is suitable for the high-end fields such as aerospace, the mold universality and maintainability are excellent, and the production efficiency is greatly improved.

The utility model relates to a terminal sleeve forming machine which mainly comprises a first sleeve distributing device, a pinch roller device, a second sleeve distributing device, a material pipe separating device, a material pipe hot pressing device, a material pipe clamping device and a heating device. One-time operation of a plurality of plastic sleeves is achieved through the first sleeve distributing device, the pressing wheel device, the second sleeve distributing device, the material pipe separating device and the material pipe clamping device, the distance can be fixed, manufacturing is facilitated, and the material pipe hot-pressing device and the heating device can conduct pipe body plastic pressing groove and necking on the cylindrical plastic sleeves. Therefore, the plastic sleeve which completes the plastic compression of the groove and the necking can achieve the effects of fixing the position of the terminal and protecting the terminal from being separated.

The present invention relates to the technical field of steel pipe necking, and particularly to the steel pipe necking process of an air conditioner silencer, which comprises the following steps: S1, measure the required necking distance at both ends and make marks; S2, heat the marked necking section and perform uniform forging on this position to form a pre-necking; S3, sleeved an adapted prefabricated necking die at the pre-necking for extrusion and rotation; S4, stop extrusion, perform accelerated rotation, and wait for the necking section to cool; S5, remove the prefabricated necking die from the necking section and perform heat treatment; S6, cut off the pre-necking at both sides of the necking section through a cutting machine, and polish the necking section through a polishing device; S7, perform silencing test. In the present invention, by heating the marked necking section of the silencer steel pipe and sleeving an adapted prefabricated necking die at the pre-necking for extrusion and rotation, the silencer steel pipe after necking can be obtained quickly and stably. At the same time, the silencer steel pipe after necking has a good silencing function.

The invention relates to the technical field of material test, in particular to a high-temperature tensile sample deformation modeling method, which comprises the following steps of: comparing the lengths of a round rod-shaped sample before and after tensile fracture to find out the original length of the part, participating in deformation, of the sample before deformation; the outer surface of the sample presents a certain taper and is regarded as a curved surface formed by rotating a curve corresponding to a quadratic function around a symmetric axis of the curve, which corresponds to the continuous change of the section diameter of the necking area along with stretching in a high-temperature state of the sample; according to the rule that the volume of the part, participating in deformation, of the sample is not changed before and after deformation, a function relation between the tensile deformation amount and the section radius of the necking area is found, a deformation model of the sample in the high-temperature tensile state is accurately described, and a foundation is laid for judging the high-temperature mechanical property of the material. And a reliable basis is provided for contents such as crack generation and rolling force prediction in the continuous casting process.

The application relates to a necking square flowmeter water distributor and relates to the technical field of pipeline water supply equipment. The square part of the water inlet main pipe and the water return main pipe is formed by high compression necking of a stainless steel round pipe through a special die. The pipe wall is uniform, not thinned, free of hidden crack dangers, higher in pressure resistance, higher in safety, and low in processing cost. The two ends of the main pipe body are provided with mounting heads, the mounting heads are fixedly provided with connecting end heads; the two ends of the main pipe are provided with threaded ports for connecting a heating system, the threaded ports are not turned on the main pipe wall, but are separately processed by thickening pipe fittings, and are then fixed on the end portions of the main pipe through welding; the outer wall and the mounting head are connected through welding, the thickness of the pipe wall at the two ends of the water inlet main pipe and the water return main pipe is guaranteed, the strength of the two ends of the water inlet main pipe and the water return main pipe is improved, the threads at the two ends of the water inlet main pipe and the water return main pipe are thick and strong, the strength is high, the through-stop gauge requirement is fully met, the torsional performance is excellent, and the threads are not easy to slip and break.

The punching structure of the high-strength part relates to the field of part production, and comprises a base, a supporting plate is fixedly arranged at the top of the base, a pressure plate used for receiving gravity is connected to the top of the supporting plate, multiple rows of T-shaped limiting grooves are formed in the surface of the pressure plate in a penetrating mode, and longitudinal rods and pressure rods are sequentially arranged at the tops of the multiple rows of limiting grooves; t-shaped abutting modules are arranged in the multiple rows of limiting grooves, T-shaped protrusions of the abutting modules are connected with the T-shaped inner walls of the limiting grooves in a clamped mode, and through holes consistent with the longitudinal bars in width are formed in the middles of the abutting modules. The ends, close to the abutting modules, of the multiple pressure rods are provided with protruding blocks used for necking shaping, the bottoms of the protruding blocks are arranged to be in an arc shape, the surfaces, located on the pressure rods, of the multiple abutting modules are provided with concave faces matched with the protruding blocks, and limiting plates are arranged on the outer surfaces of the multiple pressure rods in a surrounding mode. Residual spines are effectively prevented from protruding after punching, and a trapezoidal hole channel is formed to improve the assembly stability.

The invention discloses a cloth bag wrapping type cloth bag pile suitable for a karst area and a construction method, and relates to the technical field of karst area construction. The cloth bag does not need to be completely wrapped along the pile length, the cloth bag with the needed length is wrapped according to the specific position of the karst cave, and compared with a steel casing follow-up method, the material cost is low; compared with a backfilling method and a grouting method, the problems of slurry loss, pile body necking, diameter breaking and the like can be effectively solved, the construction cost is low, the pile forming quality is good, the cloth bag diameter redundancy is utilized, poured concrete slurry reaches the karst cave position to extrude the cloth bag to form a branch disc structure, the pile foundation bearing capacity can be improved, and the pile foundation construction period is shortened. And the safety of the pile foundation in the karst area is ensured.

The present invention discloses a low-friction rotary necking forming die, which relates to the field of plastic processing technology of light metal materials. The die comprises a clamping mechanism and a necking die, wherein a tube billet is driven to rotate under the clamping of the clamping mechanism, the necking die is driven to move vertically under the axial feed drive, and the necking mold cavity is equipped with multiple rows of rollers, and the rollers are arranged along the form of the necking part generatrix; the necking die descends, and when the upper end of the tube billet contacts the first circle of rollers of the necking die, the rollers are driven to rotate under the drive of the tube billet, and the rollers synchronously extrude the tube billet to begin shrinking and deforming. As the necking die descends, the contact area between the tube billet and the rollers gradually increases, more rollers are driven to rotate, and the deformation of the material becomes larger and larger until the necking is completed. The present invention can break through the limit necking coefficient and manufacture conical or quasi-conical components with large diameter differences and difficult-to-deform materials in a short process and high efficiency.

The invention discloses collision test equipment, a test method and a simulation method, and the method comprises the steps: constructing a plurality of sample simulation models with different grid sizes according to a to-be-tested sample plate; constructing a punch simulation model according to the punch; simulating a static collision process by utilizing each sample simulation model and the punch simulation model, and determining simulated plastic strain in the simulated collision process corresponding to each sample simulation model; and according to the simulated plastic strain of the plurality of sample simulation models, determining the incidence relation between the grid size and the fracture strain correlation coefficient. The actual collision test process is simulated in a simulation mode, the relation between the fracture strain correlation coefficient and the grid size can be determined, and then a basis for selecting the grid size of a simulation model can be provided for a corresponding material; therefore, the situation that the whole necking and fracture process cannot be accurately described due to the fact that the number of the grids is small can be reduced, and the gap between the simulation process and the actual test process is reduced.

A method of filling a via having a necking point includes performing a pre-clean process to remove residues from an exposed surface of a metal layer at a bottom of a via and recover inner surfaces of the via, wherein the via is formed within a dielectric layer and has a necking point protruding within the via, performing a selective deposition process to partially fill the via with metal fill material from the exposed surface of the metal layer below the necking point, performing a liner deposition process to form a liner layer on exposed inner surfaces of the via, and performing a metal fill process to fill the via with the metal fill material.

The invention relates to a detachable table steel pipe assembling device which comprises a base and a steel pipe placed on the base, the base is provided with a bearing seat used for connecting pieces, one side of the bearing seat is provided with a driving assembly, a hooping assembly and an opening and closing assembly, the hooping assembly and the opening and closing assembly are driven by the driving assembly, and the opening and closing assembly is provided with a supporting assembly. The supporting assembly comprises a plurality of supporting plates, moving assemblies and guiding assemblies driven by the moving assemblies are arranged on the supporting plates, the guiding assemblies comprise guiding plates arranged on the two sides of the supporting plates in a sliding mode, and the driving assembly is used for driving the hooping assembly to conduct necking on the two ends of the connecting piece and driving the supporting plates to be unfolded at the same time. The moving assembly is used for driving the guide plate to slide in the necking direction of the connecting piece, and the guide assembly is used for guiding the connecting piece during necking, so that the two ends of the connecting piece are more labor-saving and smoother during necking, the two sides are guided and connected through the guide plate during bending, and breakage caused by excessive necking at the joint of the necking part and the middle part is prevented.

The application discloses a method for predicting and evaluating the overall formability and local formability of high-strength steel. u The uniaxial tensile test is carried out, and the strain is uniformly distributed before the material reaches the tensile strength or necking instability, which reflects the overall formability of the material. The effective strain range with the necking as the center is about 20 mm, the thickness-based fracture strain of a sample with a complete fracture is determined as the evaluation index of the local formability. The method can well predict and evaluate the overall formability and local formability of advanced high-strength steel, and has the advantages of simple operation, reliable result, wide application range and low cost.

The invention discloses a self-bottom-expanding expansion piece which is used in cooperation with a screw with a conical head, the front section of the self-bottom-expanding expansion piece is an expansion section, and the rear section of the self-bottom-expanding expansion piece is a supporting section. The expansion section comprises two arc-shaped expansion pieces, and the head parts of the expansion pieces are provided with bottom expansion tool bits used for cutting in a base material; the base part of the expansion sheet is connected with the head part and the supporting section, and notches extending in the circumferential direction are formed in the two sides of the base part, so that the base part is in a necking shape relative to the head part and the supporting section; under the expansion action of the conical head, the base part of the expansion section deforms, so that the head part rotates outwards around the necking part, meanwhile, the two wings of the head part deform outwards, and the radian of the head part is gradually increased to be matched with the radian of the periphery of the conical head. According to the self-bottom-expanding expansion piece, the two-section type expansion piece design is adopted, the necking-down base part and the notch structure are combined, the problems that in the prior art, an expansion piece is prone to breakage, difficult to expand and high in cost are solved, and the self-bottom-expanding expansion piece has the advantages of being high in strength, easy to expand and low in cost.

According to the method for prolonging the service life of the nozzle slag line refractory material through the pulsed electric field, the additional pulsed electric field is applied in the continuous casting process, the uniformity, the stability, the compactness and the adhesion of a casting powder film are improved, the newly-generated casting powder film is moderately extended towards the periphery of the casting powder film, scouring and permeating of casting powder to the slag line material are effectively resisted and inhibited, and the service life of the nozzle slag line refractory material is prolonged. The slag line erosion is inhibited, the Marangnei problem and the necking phenomenon are avoided, the single continuous casting time is greatly prolonged, and the continuous casting efficiency is greatly improved. And meanwhile, inclusions in the molten steel can be more uniform, and the quality of casting blanks is improved.

The utility model discloses a stable processing device based on large necking amount processing, which comprises an upper template and a lower template, and an ejector block is arranged on the inner side of the lower template; the female die sheath is rotationally mounted on the lower die plate, and a female die is arranged on the inner side of the female die sheath; the upper die fixing plate is fixed to the lower surface of the upper die plate, and a male die extending into the inner side of the female die is arranged on the lower surface of the upper die fixing plate; according to the device, the elastic assembly and the core die are arranged, the flow of necking product materials is controlled in the whole process through the female die on the outer wall of a product and the male die and the core die on the inner wall, and therefore the product is subjected to the inward supporting force of the female die on the product and the outward supporting force of the male die and the core die in the whole necking process; therefore, the product cannot deform due to unbalanced internal and external acting forces in the whole necking process, the necking stability is guaranteed, and the smooth transition effect of the appearance of the product after necking is improved.

The utility model relates to the related technical field of steel pipe necking, in particular to a swing steel pipe double-end necking device which is characterized in that a support is mounted at the upper end of a base, an air cylinder is mounted in the support, a moving block is mounted at one end of the air cylinder, a mounting frame is mounted on the outer side of the moving block, and limiting grooves are formed in the two ends of the mounting frame; through the arrangement of the support, the air cylinder, the moving block, the mounting frame, the limiting groove, the limiting block, the sliding block, the sliding groove, the first bolt and the die, the moving block is pushed by the air cylinder, the die is driven by the moving block to sleeve a steel pipe, the steel pipe is stamped into the die, in the pushing process, the support is limited by the limiting groove and the limiting block, and inaccuracy caused by shaking in the stamping process is avoided; and through the arrangement of the limiting groove and the limiting block, the bracket is accurately positioned in the stamping process, so that the accurate positioning and the stability of the steel pipe in the die are ensured. Consistency of quality and size of the product can be ensured.

The utility model discloses an upper necking type plastic bucket, and relates to the technical field of plastic buckets. According to the technical scheme, the garbage can is characterized by comprising a can body and a can cover, the can cover is detachably connected to the can body, a containing cavity is formed in the inner top face of the can cover, a plugging assembly is slidably connected to the inner wall of the containing cavity, a sliding groove communicated with the containing cavity is formed in the can cover, the sliding groove is L-shaped, and a driving assembly is slidably connected into the sliding groove; the driving assembly extends out of the sliding groove, the upper surface of the driving assembly abuts against the blocking assembly, a through groove communicating with the sliding groove is formed in the inner side wall of the can cover, and when the weight of the driving assembly is increased and the driving assembly slides to the lowest position, the blocking assembly slides on the inner wall of the containing cavity, penetrates out of the containing cavity and extends into the opening of the can body. When an oil product leaks, the blocking block can penetrate out of the containing cavity to block the opening of the barrel body, the probability of continuous leakage of the oil product is reduced, the barrel body is made of linear low-density polyethylene materials, and the compression resistance of the barrel body is improved.

The utility model relates to necking detection equipment, which comprises a machine body, a charging tray placing frame, a mechanical arm, a transfer mechanism, a press-fitting mechanism, a necking tray and a first cylinder, wherein the charging tray placing frame and the mechanical arm are arranged in the machine body; the transfer mechanism and the press-fitting mechanism are arranged in the machine body; the necking tray is arranged on the lower side of the press-fitting mechanism in the machine body; the end portion of the telescopic end of the first air cylinder is rotationally connected with a swing arm of the necking disc. The transferring mechanism comprises an X-axis sliding table installed in the machine body, a material receiving block is installed on the outer surface of a sliding block on the X-axis sliding table, and a discharging groove is formed in the surface of the material receiving block. Probes are clamped one by one through the mechanical arm and placed on the necking disc after being transferred through the transferring mechanism, the outer surfaces of the probes are fixedly clamped through the necking disc, then acting force in the vertical direction is applied to the probes through the press-fitting mechanism, and due to the fact that the outer surfaces of the probes are clamped by the necking disc, necking of the probes is achieved in the stress reduction process; therefore, manual intervention can be reduced, the purpose of automatic necking is achieved, and product quality is improved.

The utility model relates to the technical field of necking and sizing, in particular to a necking and sizing die convenient to replace, which comprises a base, a top cover, a guide sleeve and a necking die. The closing-in die and the guide sleeve are adjacently arranged and are both mounted in the base, a top cover is arranged at the outer end of the closing-in die in an abutting mode, and the top cover is mounted on an outer port of the base; and the material returning rod is arranged in the top cover, the closing-in die, the guide sleeve and the base in a penetrating manner. And the fixed material pushing rod is used for positioning the necking raw materials, so that the raw materials are prevented from moving along with the mold, and a manipulator can grab the raw materials conveniently.

The utility model discloses a thin-wall metal pipe necking die and a thin-wall metal pipe necking device adopting the same, the thin-wall metal pipe necking die comprises a rotary lifting mechanism, a thin-wall metal pipe necking die and a clamp, the thin-wall metal pipe necking die comprises a sleeve, a necking assembly and a lubricating assembly, the necking assembly comprises a necking mandrel and a necking threading die, and the lubricating assembly is arranged on the sleeve. When the thin-wall metal pipe is necked down, the clamp clamps the lower end of the thin-wall metal pipe, the rotary lifting mechanism drives the necking die to rotate and move downwards, the upper end of the thin-wall metal pipe enters a gap between the threading die forming part and the mandrel forming part, the upper end of the thin-wall metal pipe is deformed and the pipe diameter is reduced under the rotary extrusion action of the necking die, and a necking part is formed and becomes a reducer pipe. The necked thin-wall metal pipe belongs to the same component and is free of welding seams, the reducing requirement in a pipeline system can be met without introducing a new reducing pipe, welding seams of the pipeline system are effectively reduced, the phenomena of running, emitting, dripping and leaking of the pipeline system are reduced, and the stability and reliability of the pipeline system are improved.

The invention belongs to the technical field of zinc extraction rotary kilns, and particularly relates to a zinc extraction rotary kiln head capable of preventing refractory materials from falling off and prolonging the service life of a barrel. Comprising a cylinder body, an outer cover body, a middle cover body and an inner cover body are erected outside the cylinder body, a necking opening is fixed to one end of the cylinder body, annular reinforcing ribs are welded to the necking opening, the cylinder body and the inner wall of the joint of the cylinder body and the necking opening, a plurality of axial reinforcing ribs are welded between the adjacent annular reinforcing ribs, and a plurality of protection plates are fixed to the outer wall of the joint of the cylinder body and the necking opening. A conical protective sleeve is fixed to the outer wall of the necking opening, a plurality of anchoring hooks are welded to the necking opening and the inner wall of the barrel, an annular air cooling pipe is erected on the outer side of the barrel, a plurality of air outlet holes are formed in the annular air cooling pipe, the air outlet directions of the air outlet holes face the barrel, and pouring materials are poured to the inner walls of the barrel and the necking opening. According to the invention, through the synergistic effect from multiple aspects, refractory falling is reduced, the service life of the barrel is prolonged, the overall operation efficiency of the rotary kiln is improved, and the maintenance cost and the production downtime are reduced.

The invention relates to the technical field of test simulation, in particular to a method for simulating and predicting a high-temperature forming limit curve of a medium-thickness plate material. The method comprises the following steps: constructing a plate model and a mold model for a bulging test; grid division processing is conducted on the plate model and the mold model; defining a property model and a thermal material model of the plate model and the mold model; wherein the property model comprises a plurality of groups of property parameters, and the thermal material model comprises a plurality of groups of thermal parameters; defining a friction coefficient, an ambient temperature, an initial temperature and a heat conductivity coefficient between the model and the mold model; the necking instability of the material in the thickness direction is recognized through the maximum male die force criterion and the strain path transformation criterion; and representing the temperature field change, the pressing displacement change and the thinning rate change of the plate material model, and carrying out simulation prediction on the high-temperature forming limit curve of the medium-thickness plate material. According to the scheme provided by the invention, the medium-thickness plate material high-temperature forming limit curve can be obtained through simulation prediction.

The present invention discloses a necking method for reducing the oxidation of the bottom of single crystal silicon based on the Czochralski method, which includes loading materials, melting materials, seeding, shoulder formation, constant diameter growth, tailing and furnace shutdown. When a wire break occurs during the constant diameter operation, the following steps are included: S1. Open the pump opening of the vacuum pump to 100% for crystal pulling; S2. On the basis of step S1, set the flow rate of argon to more than 120 sL / min; S3. On the basis of step S2, use a speed of 10 - 160 mm / min to lower the position of the crucible; S4. On the basis of step S3, set the flow rate of argon to 100 sL / min; S5. On the basis of step S4, set the speed of lowering the position of the crucible to 280 mm / min; S6. After completing the necking, perform tailing and furnace shutdown. By improving the sequence of the necking method and optimizing the crystal pulling speed and necking speed during necking, and at the same time, each step is carried out simultaneously in sequence, the occurrence of oxidation of the bottom single crystal silicon is effectively reduced, the quality of the single crystal silicon recycled material is improved, and the cleaning cost is saved.

The present invention provides a method for predicting or evaluating the necking performance of a film made of a polylactide resin, which is simple and has high prediction accuracy, and thus can replace an actual measurement method, thereby predetermining the film performance of a new structure.

The utility model discloses a harmonica-shaped tube type water-cooling plate structure which comprises a water-cooling plate left water chamber assembly, a water-cooling plate right water chamber assembly and a flat tube, and the water-cooling plate left water chamber assembly is connected with the water-cooling plate right water chamber assembly through the flat tube. The flat pipe comprises a porous micro-channel, a first necking structure and a second necking structure, the first necking structure and the second necking structure are arranged at the left end and the right end of the flat pipe, a partition notch is formed in the middle of the porous micro-channel, the flat pipe is connected with the left water chamber assembly through the first necking structure, and the flat pipe is connected with the right water chamber assembly through the second necking structure and the partition notch. The water-cooling plate core assembly is low in cost, light in weight, simple in structure, high in production and manufacturing efficiency, free of change in the production process and suitable for large-scale popularization and application in the industry.

The utility model relates to steel pipe processing equipment technical field provides a seamless steel pipe necking mechanism, including base and locate on the base's feeding unit, necking unit, blanking unit and positioning unit, positioning unit includes locating plate, limit stop and first lift cylinder, and the locating groove that places for steel pipe is set up on locating plate, and locating plate and limit stop cooperate and fix steel pipe, feeding unit can convey steel pipe to locating groove, blanking unit is located between two locating plates for moving out steel pipe in locating groove from locating groove, one side of locating plate is connected with baffle, and the end of baffle can insert into the feeding of blocking steel pipe in feeding unit, the utility model discloses can realize the full automation of steel pipe necking, and necking efficiency is high.