109results about "Mandrels" patented technology

The utility model relates to a secondary rolling plug for rolling a seamless tube, which is characterized in that a pipe throwing section, a rounding section, a wall-reducing uniform integrated transformation section, a compression rotating rolling section, a contact biting section and a contact section are sequentially formed on a plug body from right to left; and the outer side surfaces of the pipe throwing section, the rounding section, the wall reduction uniform integrated transformation section, the compression rotating rolling section, the contact biting section and the contact section are all revolution surfaces taking the axis of the plug body as the axis. Through the design of the surface shape of the top body, the surface of a non-ferrous metal tube is not easily scratched, and the technical problems that the roll shape of a conventional three-high rolling mill cannot realize biting rotation, clamping in the rolling process and smooth tube throwing in the non-ferrous metal rolling process are solved; when the plug body outputs lubricating oil, large metal extension and extension coefficients are achieved, the compactness of metal material structures is improved, the problems of multiple inner surface defects and spiral traces in the core rod rolling process are solved, and the quality problems caused by inner pitted surfaces and secondary oxidation in the large extension process are solved through a self-lubricating system.

The invention discloses a cold rolling die with a straight rib thin-wall cladding pipe, a production process and the cladding pipe, and relates to the technical field of reactor fuel cladding, the cold rolling die comprises a cold rolling outer die for controlling the forming of the outer contour of a pipeline and a cold rolling core head for controlling the inner diameter; the cold rolling outer die is a die with a hollow area inside, the hollow area comprises a pitch circle section and a fixed rib section, and the fixed rib section is provided with at least one section of rib groove; a pipeline forming die cavity is formed by hollow areas of the two cold rolling outer dies, and a roll gap is formed between the two cold rolling outer dies; when the cold rolling die is used for producing the cladding pipe, the requirement for room-temperature plasticity of cladding materials in the forming process is low, the quality of the surface of the cladding pipe cannot be affected in the forming process, the quality of a formed product is high, and the cold rolling die is simple in structure, low in manufacturing cost and suitable for popularization and application. The thin-wall cladding tube with the straight ribs produced by the cold rolling die is good in surface quality, and the ribs of the cladding tube are good in mechanical property.

The invention discloses a rolling and expanding bidirectional laminating method for a layered bimetal composite hollow shaft, which is characterized in that an outer shaft and an inner shaft which are made of metal materials are in interference fit to obtain an initial composite hollow shaft; then the initial composite hollow shaft is fed into a three-roller skew rolling mill, when a roller performs skew rolling on the initial composite hollow shaft, the reaming rod extends into an inner hole of the initial composite hollow shaft at the same time, and the outer diameter of the reaming rod is larger than the diameter of the inner hole of the initial composite hollow shaft; the initial composite hollow shaft is subjected to bidirectional compression in the radial direction by the roller and the reaming rod during rolling; the initial composite hollow shaft is pushed forwards in the axial direction, meanwhile, the axial relative position of the roller and the reaming rod is kept unchanged till lamination rolling of the whole composite hollow shaft is completed, and the layered bimetal composite hollow shaft is obtained; the device has the advantages that during rolling, the roller and the reaming rod simultaneously compress the composite hollow shaft inside and outside in the radial direction, and the bonding strength of the composite hollow shaft is remarkably improved.

To provide a plug mill rolling method advantageously avoiding pit-shaped defect residue of a hollow tube inner surface by keeping rolling pressure in a plug mill by giving a method that allows prevention of buckling even in the case of a bar of a small outer diameter.SOLUTION: According to a plug mill rolling method, a plug to be fitted at one end of a cylindrical bar disposed on a central axis of a hollow tube is inserted inside a punched hollow tube, pressing is given between at least a pair of pressure rolls arranged outside the plug and the hollow tube to extend the hollow tube. A middle position in a longitudinal direction of the bar away from the other end of the bar fixed and supported is supported according to shift of a bar radial direction generated to the bar caused by rolling load given in the direction of the bar shaft.SELECTED DRAWING: Figure 4

The utility model belongs to the field of cold rolling equipment, and provides a cold pilger mill core rod clamping and conveying device which comprises a rack, a main clamping and conveying assembly and an auxiliary clamping and conveying assembly. The main clamping and conveying assembly comprises a rotating device fixedly installed on the machine frame and a chuck device which is movably installed on the machine frame and can be close to or away from the rotating device. The auxiliary clamping and conveying assembly comprises clamping wheels and a motor, the clamping wheels are arranged between the rotating device and the chuck device in pairs and can be close to or away from each other, the motor is in transmission connection with the clamping wheels so as to drive the clamping wheels to rotate, and the chuck device is used for driving a target core rod to penetrate through a gap between the clamping wheels; the clamping wheel forms a V-shaped groove which rotates around the center axis of the clamping wheel and is used for clamping the target core rod. The technical problem that in the prior art, the core rod conveying efficiency is low can be solved.

The utility model discloses a heat-resistant and wear-resistant piercing plug with high stability, which comprises a plug body, a connecting rod arranged at the bottom of the plug body, a liquid conveying pipe arranged inside the connecting rod, a cooling cavity arranged inside the plug body, a fixing rod fixedly connected with the inner wall of the plug body, a reinforcing plate fixedly connected with the outer side of the fixing rod, and a water outlet arranged on the inner wall of the plug body. The bottom of the plug body is fixedly connected with the heat insulation layer, the outer side of the connecting rod is fixedly connected with the fixing cylinder, the inserting rod is arranged on the fixing cylinder, and the sliding cylinder is arranged on the outer side of the connecting rod and fixedly connected with the two ends of the sliding rod. Cooling is carried out through the cooling cavity, instability of the ejector head caused by high temperature is avoided, abrasion of the ejector head is reduced, the strength of the ejector head is enhanced through cooperation of the fixing barrel and the reinforcing plate, the sliding barrel is pushed to enable the connecting rod to move in the sliding groove, the inserting rod is driven to be separated from the inserting hole, and then the ejector head body can be disassembled. The dismounting difficulty of the plug body is reduced.

The application provides a cold rolling method for reducing surface cracks of TC4 titanium alloy seamless pipes, relates to a cold rolling pipe manufacturing technology in the metallurgical and mechanical industries, and comprises the following steps: adopting a two-roller cold rolling machine to roll a blank with a specification of Ф76*7.5mm into a finished product with a specification of Ф25*3mm. When rolling, the left and right openings of the groove are designed to be asymmetric, Fx1 and Fx4 are constant, the sizes of Fx2 and Fx3 are 0.1mm larger than those of Fx1 and Fx4, and the sizes are used to accommodate part of the long axis of the cross-section ellipse of the seamless pipe; meanwhile, the opening angle is constant, and the opening angle Fw2 is 5° larger than Fw1. Through optimization of the deformation tools such as the mandrel and the roller groove, reasonable adjustment of the feed amount and the rotation angle, the occurrence of the effective inner and outer surface cracks is effectively reduced. According to the characteristics and technical requirements of different TC4 titanium alloy seamless pipes, the cold rolling pipe manufacturing process is organized and implemented, the surface defect loss of the titanium alloy pipe is reduced, the surface rolling quality is continuously and stably improved, and the energy saving, emission reduction and consumption reduction effects are remarkable.

The invention provides a metal middle core rod and a manufacturing method thereof, and belongs to the technical field of core rod machining. The metal middle core rod comprises a core rod body and a core rod head, the core rod head is arranged at one end of the core rod body, a stress reducing mechanism is arranged in the core rod body and comprises an air inlet channel, a first heat dissipation channel and a first channel, the air inlet channel is formed in an inner cavity of the core rod body and used for introducing high-pressure air, a spiral air return channel is further formed in the inner cavity of the core rod body, and the first heat dissipation channel is communicated with the first channel. And an exhaust nozzle is arranged on the surface of the core rod body, and the exhaust nozzle is communicated with the air return channel. According to the invention, the temperature in the temperature sensing cavity is gradually increased through the arrangement of the stress reducing mechanism, so that the bimetallic strip is deformed and bent downwards, the sliding plate and the cross are pushed to gradually move upwards, the first channel is gradually conducted by the first sealing plate, and the cooling liquid can enter the first heat dissipation channel for liquid cooling heat dissipation; the larger the cooling liquid flow in the first heat dissipation channel is, the heat dissipation effect is guaranteed, and the thermal stress on the surface of the core rod body is reduced.

To provide a method for predicting a life of a mandrel bar that can extend a life of a mandrel bar, and to provide a method for manufacturing a mandrel bar and a device for setting a manufacturing condition of a mandrel bar.SOLUTION: A method for predicting a life of a mandrel bar that is manufactured through a hardening step and a tempering step includes, as input data, one or more parameters selected from attribute information of a mandrel bar, one or more parameters selected from operational parameters relating to the hardening step, and one or more parameters selected from operational parameters relating to the tempering step, and predicts a life of a mandrel bar using a life prediction model generated from machine learning which uses a life of a mandrel bar as output data.SELECTED DRAWING: Figure 2

The present invention relates to a high temperature forming tool (1), at least part of which consists of a molybdenum-based alloy having a molybdenum content of ≥ 90 wt.%, the molybdenum-based alloy being in a compacted and sintered state and having a thermal shock resistance of at least 250 K in the compacted and sintered state, where the thermal shock resistance is R eH is defined as the quotient of / (α·E), and R eH is the yield point at room temperature in MPa, α is the coefficient of thermal expansion in 1 / K, and E is the elastic modulus in MPa.

The utility model discloses a steel pipe perforating and rolling tool which comprises a perforating and rolling tool body, the perforating and rolling tool body comprises a connector, one end of the connector is fixedly connected with a connecting pipe, an opening is formed in the middle of one end of the connecting pipe, a threaded pipe is arranged in the middle of the opening, and an ejector rod is arranged in the middle of the threaded pipe in a threaded mode. A butt joint structure is further included, the butt joint structure comprises a butt joint pipe, a threaded ring is arranged on the outer surface of the butt joint pipe in a threaded mode and extends into the connector, rectangular protrusions are arranged on the outer surface of the threaded ring at equal intervals, and a butt joint column is arranged in the middle of the butt joint pipe. According to the utility model, while being easy to disassemble and assemble, a damaged structure can be independently overhauled and maintained, so that the cost is reduced, the axial force of the ejector rod is increased, so that the use requirement is better met, the bending damage probability of the ejector rod is reduced, and the cost is further saved; and subsequent thread slipping or breakage can be avoided, so that disassembly and replacement of the ejector rod are not affected, and the use effect is improved.

Device (10) for handling mandrel bars (3) in a rolling plant (1) with a rolling mill (20) for rolling seamless pipes (2'), the device (10) having a pusher (11) for moving a mandrel bar (3) arranged in a rolling line (L) in a rolling direction (R) so that the mandrel bar (3) can be fed from a basic state into a pipe blank (2) arranged before the mandrel bar (3) in the rolling direction (R), a holding apparatus (12) with a stationary unit (12a) movable along the rolling line (L), which holding apparatus is arranged to temporarily fix the mandrel bar (3) at a point of action (3c) in the area of a rear end (3b) of the mandrel bar (3) and to perform a working stroke starting from a starting position (xA) in the rolling direction (R) and against the rolling direction (R), whereby the mandrel bar (3) can be driven into the rolling mill (20) in the rolling direction (R) and can be pulled out of the rolling mill (20) against the rolling direction (R) by the holding apparatus (12), characterized in that the holding apparatus (12) is such that the stationary unit (12a) in the starting position (xA) in the basic state is located between the two ends (3a, 3b) of the mandrel bar (3). A ​

The application provides a wear-resistant composite piercing mill head manufacturing method and a piercing mill head, and the manufacturing method comprises the following steps: S1, preparing a steel base head; S2, adopting a submerged-arc welding process to make a flux-cored wire cladded on a working cone surface and a nose end surface of the steel base head, so as to form a cladding layer with a thickness of 6-8 mm; and S3, pre-oxidizing the cladding layer of the steel base head at high temperature, so that the wear-resistant composite piercing mill head is obtained. The wear-resistant composite piercing mill head manufacturing method has a dense and uniform oxide film on the surface of the cladding layer of the piercing mill head, the oxide film is firmly combined with the cladding layer, and the existence of the dense and uniform oxide film can reduce the power consumption of a steel pipe piercing mill and prolong the service life of the piercing mill head.

The invention belongs to the field of metal materials, and relates to a long-life temperature-resistant anti-crack composite plug and a preparation method thereof. According to the invention, through elaborate design of components of the metal layer, excellent hardness and wear resistance are provided, the material is suitable for high-temperature and high-wear working conditions, and by adding a proper amount of RE and Ni, the plasticity and toughness are improved while the material strength is improved, the service reliability is remarkably improved, and the service life is remarkably prolonged; an asymmetric thermal field which is fast in internal cooling and slow in external cooling is constructed, high-quality interface bonding and a compact structure are achieved in the composite casting process, a surface pressure stress field beneficial to crack resistance is formed in the service process, thermal stress concentration is effectively relieved, generation and extension of thermal fatigue cracks are restrained, and the service life of the composite casting is prolonged. And the service life, temperature resistance and crack resistance of the composite plug are improved.

The invention discloses a core rod circulating cooling method for a CPE (chlorinated polyethylene) pipe jacking unit, a core rod comprises a section II, and the method comprises the following steps of: backwards conveying the core rod subjected to rod stripping treatment in a steel pipe production process, and feeding the core rod into a core rod forced cooling device for forced cooling in the conveying process so as to reduce the core rod to a target temperature T0; the core rod forced cooling device comprises a plurality of forced cooling areas, each forced cooling area is sequentially divided into a front forced cooling section and a rear forced cooling section from front to back, the temperature T1 of a core rod II section is collected between core rod stripping treatment and entering of the front forced cooling sections, and a first forced cooling strategy is executed in the front forced cooling sections: when T1 is larger than or equal to 650 DEG C, water cooling is conducted on the surface of a core rod according to the set maximum cooling flow; when T1 is larger than or equal to 600 and smaller than 650 DEG C, the surface of the core rod is subjected to water cooling according to the set intermediate cooling flow; and when T is larger than or equal to 550 DEG C and smaller than 600 DEG C, water cooling is conducted on the surface of the core rod according to the set minimum cooling flow. By means of the method, the core rod can be effectively cooled, abrasion and consumption of the core rod are reduced, and the steel passing service life of the core rod is prolonged.

The utility model discloses a replaceable rear clamping structure, which relates to the technical field of cold pilger mills and comprises a machine body and a replacement assembly, a hollow shaft is arranged in the machine body, one end of the hollow shaft is connected with the replacement assembly, and the replacement assembly comprises a fixed flange, a bolt, a nut, a connecting flange, a positioning sleeve, a self-centering three-jaw chuck and a mounting hole. A fixing flange is arranged at one end of the hollow shaft, a bolt is arranged in the outer end of the fixing flange, and the end of the bolt is sleeved with a nut. According to the replaceable rear clamping structure, due to the arrangement of the replacement assembly, the fixing flange is installed at the tail end of the hollow shaft, when a fine core rod is clamped, a nut can be unscrewed, a connecting flange is detached from the fixing flange, and then a self-centering three-jaw chuck is installed on the fixing flange through an installation hole and a bolt; and the fine core rod can be fixed by manually operating the self-centering three-jaw chuck, so that normal clamping of the core rod below 5mm is ensured.

To provide a manufacturing method for a mandrel bar and a manufacturing apparatus for a mandrel bar that can perform tempering heat treatment of a mandrel bar without using an atmosphere furnace.SOLUTION: A manufacturing method for a mandrel bar is for manufacturing a mandrel bar by performing a hardening heat treatment and then a tempering heat treatment on the mandrel bar, determines the hardness to be achieved by the tempering heat treatment of the mandrel bar, determines a heating temperature, a holding time, and the upper limit temperature required to achieve the determined hardness, determines a range required to achieve the determined hardness of the mandrel bar, determines the induction heating heat treatment conditions that will achieve the heating temperature and holding time within the required range, and also ensure that the maximum temperature is not exceeded, and then performs a tempering heat treatment of the mandrel bar with the determined heat treatment conditions.SELECTED DRAWING: Figure 2

The utility model relates to the technical field of cooling equipment, and discloses self-circulation cooling equipment for manufacturing seamless steel pipes through hot punching, which comprises a fixing plate, a water tank, a cooling device, a cooling device and a control device, and is characterized in that the bottom end of the fixing plate is fixedly provided with the water tank; the cooling mechanism is arranged at the bottom end in the water tank; wherein the cooling mechanism comprises a liquid pump, and a two-way pipe is fixedly connected into the top end of the liquid pump in a sleeved mode. According to the self-circulation cooling equipment, a set of complete water circulation system is constructed, cooling water is not directly discharged like a traditional mode after the task of cooling the ejector rod is completed, but returns to the water tank again to be recycled, and the design enables the utilization rate of water resources to be greatly improved, so that the cost is reduced, and the service life of the ejector rod is prolonged. Dependence on an external water supply system is greatly reduced, the water supply pressure of a water resource shortage area is effectively relieved, and due to the fact that cooling water is recycled, discharge of a large amount of sewage containing impurities and high temperature is reduced.

The utility model discloses a core rod conveying and pushing mechanism for seamless tube processing, which comprises a core rod pressing mechanism, a core rod conveying mechanism and a core rod pushing mechanism, the core rod pressing mechanism and the core rod conveying mechanism are crosswise arranged from top to bottom, the core rod pushing mechanism is positioned on the rear side of the core rod conveying mechanism, and the core rod pushing mechanism is positioned on the rear side of the core rod conveying mechanism. The core rod pressing mechanism comprises a pressing oil cylinder, a pressing rack and a fixed rack, the core rod conveying mechanism comprises a conveying motor, a conveying speed reducer, a universal coupling, a gear shaft, a driving gear, a driven gear, a driving conveying roller and a driven conveying roller, and the core rod pushing mechanism comprises a lifting oil cylinder, a pushing oil cylinder and an oil cylinder support. The mandrel can be automatically clamped, pushed and separated, rapid feeding and discharging of pierced billets are facilitated, the rolling rhythm is compact, the rolling period is shortened, and the production efficiency is improved.

The present invention discloses a self-lubricating and forming inner core device suitable for the cold rolling of stainless steel tubes using hydrogen energy, comprising an inner forming core and a self-lubricating arrangement attached to one end of the inner forming core, wherein a flow channel is arranged on the inside of the inner forming core and several lubricating fluid holes are arranged on the surface of the inner forming core, wherein several lubricating fluid holes increase stepwise along the inner diameter of one end away from the self-lubricating arrangement, wherein the self-lubricating arrangement comprises a pump box, a fluid storage tank, a diverting valve assembly and a movable shaft assembly as well as several movable partitions on the inside of the pump box, wherein one side of the pump box is fixedly connected to a guide cap.The design of the self-lubricating and forming inner core device in the present invention ensures that the lubricating fluid is distributed evenly and continuously on the surface of the inner core, particularly at the end furthest from the lubrication source. Optimizing the distribution and size of the lubricating fluid holes significantly improves the lubrication between the inner core and the inner wall of the stainless steel tube, thereby reducing friction and wear during processing and improving the accuracy and surface quality of the stainless steel tube during cold rolling.

An inclined rolling apparatus is provided to prevent shape defects in the front and rear unstable portions of a seamless tube blank. An inclined rolling apparatus includes an inclined piercing mill for piercing rolling and an inclined outer diameter mill connected after the inclined piercing mill, wherein the distance LS (mm) between the rolling portion of the piercing roll and the rolling portion of the outer diameter roll satisfies the following equation (1), and the roll spacing DS of the plurality of outer diameter rolls satisfies the following equation (2): 3×(1.2PO+2G)≤LS≤0.8BL…(1) 1.2PO+2G>DS≥DB+2G…(2) In equations (1) and (2), PO is the outer diameter of the mandrel (mm), G is the spacing between the mandrel and the piercing roll (mm), BL is the length of the rod (mm), and DB is the outer diameter of the rod (mm).

The invention discloses a multi-group roller step-by-step rolling method for a thin-wall special-shaped multi-blade cladding tube, and relates to a multi-group roller step-by-step rolling method. The problems that in a common single-pass drawing forming process, the cross section error of a finished pipe is large, defects are prone to being generated, and efficiency is low are solved. The method comprises the following steps: step 1, preparing a blank pipe; 2, the blank pipe is filled with low-melting-point alloy powder, and then the two ends of the blank pipe are plugged; 3, closing up the two ends of the blank pipe; 4, the blank pipe is subjected to multi-section roller special-shaped skew rolling; 5, the blank pipe obtained after multi-section roller special-shaped skew rolling is put into a vertical atmosphere furnace to be annealed, and a molten low-melting-point alloy core is taken out of the pipe; and 6, the pipe annealed in the step 5 is subjected to ultrasonic cleaning and drying, and the finished special-shaped pipe is obtained. The invention belongs to the technical field of design, processing and manufacturing of nuclear reactor fuel element jackets.

A three-roll tilt roll forming method is disclosed that increases the number of times and the time for finishing the surface of the forming area of ​​the rolled member by the rolling rollers during the rolling process, effectively reduces defects of spiral marks on the surface of the rolled member, ensures the mechanical properties of the hollow shaft system member, reduces the finishing allowance in subsequent machining, and reduces material waste. [Solution] The rolling rollers of a three-roll inclined rolling mill are installed in a drum shape, and the shape of the rolling rollers is optimized so that the rolling rollers and the rolling member are always in line contact with each other at any time in the Cartesian coordinate system of the rolling rollers during the rolling process. During rolling, the reduced diameter section of the tube material rolled member is first rolled, then the straight shaft section is rolled, and finally the expanded diameter section is rolled, and finally the finished rolled member is obtained. This method is characterized by optimizing the shape of the rolling rollers so that the rolling rollers and the rolling member are always in line contact with each other at any time in the Cartesian coordinate system of the rolling rollers during the rolling process.

The application belongs to the field of seamless pipe processing and relates to a HR3C super-thick seamless pipe processing and manufacturing method for power station superheaters; the technical scheme comprises the following steps: perforating round steel, surface cleaning, cold rolling of the blank pipe, heat treatment and degreasing treatment; the round steel is heated to 1200 DEG C, then perforated by using a perforator, the included angle between the perforation roller and the roller center is 8 DEG during the perforation process, the rolling speed is 260-270 r / min, and the blank pipe is prepared; the blank pipe is straightened and pickled, and surface defects are cleaned; the blank pipe is rolled by using a cold rolling pipe machine, the ratio of the diameter of the large head of the mandrel of the cold rolling pipe machine to the diameter of the sizing section is 1-2.5; the blank pipe after the cold rolling is subjected to degreasing treatment; the blank pipe after the degreasing treatment is subjected to heat treatment; the method for perforating the round steel further comprises the following steps: the round steel is heated to 1200±10 DEG C, and the heating time is kept for 6 hours.

The utility model relates to the technical field of metal pressure processing, in particular to a flow guide optimized tube blank punching efficient top head structure which comprises a top head, and the inner wall of the top head is fixedly connected with a plurality of round fixing plates which are arranged in parallel. A good heat dissipation system can be formed by the connecting pipes on the surfaces of the round pipes, the spiral heat dissipation pipes and the partition plates in the spiral heat dissipation pipes. The heat dissipation area is increased through the spiral heat dissipation pipe, heat generated by the plug in the working process can be rapidly dissipated out, and the plug is kept within the proper working temperature range. Meanwhile, although the tungsten carbide coating on the surface of the plug is only 5 microns, tungsten carbide has the characteristics of high hardness and strong wear resistance, so that the wear resistance and corrosion resistance of the surface of the plug can be greatly enhanced, the service life of the plug is prolonged, and the problems of cost increase and production interruption caused by frequent replacement due to wear and corrosion of the plug are reduced; and continuity and stability of production are guaranteed.

The invention discloses a piercing plug with a heat-resistant head and steel adhesion difficulty and a preparation process of the piercing plug, belongs to the technical field of metal materials, and aims to solve the technical problem that the high-temperature resistance of a piercing plug for a high-strength seamless steel pipe in the prior art needs to be further enhanced. Pouring on a preheated stainless steel mold, and carrying out vacuum casting to obtain a cast ingot; the cast ingot is placed in a preheated muffle furnace for heat preservation, heating and heat preservation are conducted, quenching, tempering and furnace cooling are conducted, and a piercing plug base body is obtained; the surface of the piercing plug base body is subjected to rough grinding, laser cladding of a transition layer and a ceramic layer, annealing, grinding and polishing treatment are conducted in sequence, and the piercing plug with the heat-resistant head and not prone to steel adhesion is obtained; the piercing plug with the heat-resistant head not easy to stick to steel, prepared by the invention, not only has good high temperature resistance and wear resistance, but also has good hardness, is not easy to stick to steel, and is beneficial to service life.

The invention discloses a perforating machine background center line calibration tool and method.The perforating machine background center line calibration tool is arranged between a perforating main machine and an ejector rod trolley, the perforating machine background center line calibration tool comprises centering devices, an adjusting assembly and a calibration frame, and the adjusting assembly is arranged between the centering devices and used for adjusting a perforating machine background; according to the three-roller core holding device, the deviation values of the station center line and the rolling center line in the horizontal direction and the vertical direction are calibrated, the calibration precision is high, the consistency of the measurement precision is effectively guaranteed, and meanwhile the consistency and the interchangeability of the three-roller core holding device can be effectively guaranteed.

This invention relates to a high-efficiency piercing device, comprising a platform and a feeding mechanism. A piercing mechanism is located at the tail end of the feeding mechanism, a transfer mechanism is located on one side of the piercing mechanism, and a cooling mechanism is located at the tail end of the transfer mechanism. Unloading mechanisms are located on both sides of the feeding mechanism. The piercing mechanism includes a support component, a top support component a, and a top support component b. The transfer mechanism includes a rodless cylinder and a rotating component. The cooling mechanism includes a water spray component and a switching component. The feeding mechanism drives the stainless steel round bars to be pierced under the action of the top support components a and b. The rodless cylinder moves to switch the work positions of the top support components a and b. The rotating component, in conjunction with the feeding mechanism, transfers the stainless steel round bars to the unloading mechanism. The unloading mechanism is used to unload the stainless steel round bars. The switching component controls the water spray component to cool the top support components a and b sequentially. This invention solves the problems of long processing intervals, poor continuity, and low efficiency in traditional technologies.

To provide a model generation method, a model generation device and a life determination method of a tool for hot rolling which can generate a model capable of objectively determining a life of a tool for hot rolling in a short time.SOLUTION: A model generation method for generating a model for determining a life of a tool for hot rolling includes: an image acquisition step of acquiring an image obtained by photographing appearance of a tool for hot rolling; a label designation step of imparting at least one label among a plurality of labels predetermined for the appearance in the image; and a generation step of generating a learned model by machine learning with the appearance as an explanatory variable and at least the one label as an objective variable, using the image to which at least the one label is imparted.SELECTED DRAWING: Figure 1

The utility model discloses a die for accurately controlling the outer diameter of a hot-rolled seamless steel pipe, which relates to the technical field of seamless steel pipe processing and comprises a workbench, a clamp disc slidably mounted on the workbench, a die rod clamped and mounted on the clamp disc, a sliding frame slidably mounted in a through groove, and a rotating ring rotatably mounted in the sliding frame. A square frame is fixedly mounted in the rotating ring, mounting frames are movably mounted on the four edges of the interior of the square frame, extrusion rollers are rotationally mounted in the four mounting frames, hydraulic cylinders are fixedly mounted on the four edges of the exterior of the square frame, a gear ring is fixedly mounted on the outer ring of the rotating ring, and a third motor is fixedly mounted at the top end of the sliding frame; according to the seamless steel pipe extrusion die, the die rod with the corresponding size is inserted into a seamless steel pipe in a penetrating mode according to the inner diameter size of the seamless steel pipe before the seamless steel pipe is extruded, and the inner diameter of the seamless steel pipe can be prevented from being reduced during extrusion.