Operating mechanism of the die for forging rail bottom of special-shaped rails

Abstract

Provided is a special-shaped rail forging rail bottom die operating mechanism, comprising an upper die frame; a rail bottom rolling die is installed at the rear end of the upper die frame; a servo cylinder is provided at a distance and parallel to the rail bottom rolling die and located beside the bottom of the upper die frame; the servo cylinder performs telescopic action on the rail bottom rolling die along the axial direction; the servo cylinder execution end is detachably connected to the power input end of the die connection part; the power output end of the die connection part is connected to the rail bottom rolling die; the power input end of the die connection part is also connected to the push rod execution end; when the servo cylinder execution end is removed from the die connection part, the push rod is used for manual push-pull operation of the rail bottom die displacement. The present invention solves the technical problems of manual push-pull operation, high frequency of shutdown and maintenance, poor manual operation environment, labor-intensive, time-consuming and labor-intensive, poor product quality consistency, and low production efficiency; the present invention has a reasonable structure, is easy to install and maintain, is convenient to design and construct, and can be widely used in the field of rail heel forging.

Description

Technical Field

[0001] The invention belongs to the technical field of metal pressing rail forging, and in particular relates to an operating mechanism for a rail bottom die for forging a special-shaped rail. Background Art

[0002] Special-shaped rail forging refers to the forging process of forging a certain length of the section of the rail end into another type of rail section blank, also known as rail heel forging. The composite extrusion die used in the forging of special-shaped rails has long been the main die production process in this field because of its flexibility, combination operation, rich experience, low daily maintenance cost, wide range of equipment performance and operating accuracy, and few limitations.

[0003] At present, the composite extrusion die is mainly composed of the rail head die, the rail waist die, and the rail bottom die. The forming process is mainly divided into the blanking process and the shaping process. The forming principle is that the rail head is placed upside down into the mold, and the forming sequence is the rail head first, then the rail waist, and then the rail bottom. From the perspective of the cross section, the excess metal is finally concentrated on the rail bottom to form and accumulate. Among them, in the blanking process, the number of the rail bottom blanking process is the sum of the number of the other process steps, about 5-9 rail bottom blanking process steps. Therefore, the rail bottom blanking process is the main process step, and the rail bottom blanking die is the main die.

[0004] Under the existing technology, the rail bottom mold uses a long-distance push rod manually operated to push and pull the rail bottom mold and position it. The single-step single-time press machine up and down operation time is about 5 seconds, the manual mold change time is about 3 seconds, and the continuous operation time of a single step will reach 40-70 seconds. The daily shift production is more than 60 pieces, and the single continuous machine tool operation time is about 8 minutes. The rail parts need to be self-checked and recorded one by one. The mold operation and workpiece self-inspection are performed by the same person in the same position to adjust the mold and deal with emergencies in time, which is labor-intensive, time-consuming and labor-intensive. In addition, the mold operation accuracy of the rail bottom rolling step is required to reach 2mm. When working manually, the upper and lower mold steps of the press are manually changed and the mold position is accurately positioned. High temperature, high oil smoke, high shift production, high noise, high vibration, high frequency, long-distance vision, long-term labor intensity and other factors make the operation labor-intensive, time-consuming and labor-intensive, resulting in the current continuous, accurate, continuous and collaborative operations. For different workpieces, it is always difficult to stabilize and continue production. In this regard, the following technical solutions are proposed. Summary of the invention

[0005] The technical problem solved by the present invention is to provide an operating mechanism for a special-shaped rail forging bottom die, which solves the technical problems of manual push-pull push rod operation of the special-shaped rail forging bottom die, high frequency of shutdown for maintenance, poor manual operation environment, labor-intensive, time-consuming and labor-intensive, poor product quality consistency and low production efficiency.

[0006] The technical solution adopted by the present invention is as follows: an operating mechanism for the rail bottom mold for forging a special-shaped rail, which has an upper mold frame; the center of the bottom rear end of the upper mold frame is axially slidably adapted to install the rail bottom rolling mold; a servo cylinder is provided on the side of the bottom of the upper mold frame parallel to the rail bottom rolling mold; the servo cylinder performs telescopic action on the rail bottom rolling mold along the axial direction; the execution end of the servo cylinder is detachably connected to the power input end of the mold connecting part; the power output end of the mold connecting part is connected to the rail bottom rolling mold; the power input end of the aforementioned mold connecting part is also connected to the execution end of the push rod; when the execution end of the aforementioned servo cylinder is removed from the power input end of the mold connecting part, the push rod is used to manually push and pull the axial linear displacement of the rail bottom rolling mold.

[0007] In the above technical solution, further: a T-shaped slide groove is provided at the bottom center of the rear end of the upper mold frame; the rail bottom rolling mold is slidingly and frictionally adapted to the T-shaped slide groove to move linearly along the central axial direction of the upper mold frame.

[0008] In the above technical scheme, further: a plurality of circumferential reinforcements are evenly distributed and spaced at regular intervals on the outside of the servo cylinder body; the servo cylinder body is reinforced and installed by the circumferential reinforcements; a protective cover is provided on the outside of the servo cylinder body; the protective cover is used to isolate high-temperature steam, heat radiation, heat convection, workpiece oxide scale, dust debris and foreign matter; the protective cover is provided with an air duct; the air duct is used for air cooling of the servo cylinder body inside the protective cover 5.

[0009] In the above technical scheme, further: a transition plate is fastened and detachably installed at the lifting hole position beside the upper mold frame, the transition plate carries and installs the servo cylinder and the actuator related to the push rod, the transition plate is provided with a lifting lug, the lifting lug is used for lifting the transition plate and the bearing components thereon after the overall removal; a plurality of axial guide sleeves are fixedly installed on the transition plate, the push rod is coaxially sliding and frictionally adapted with the plurality of axial guide sleeves; a ruler scale is provided on the push rod, the ruler scale is equipped with an equivalent homologous pointer, the equivalent homologous pointer is fixedly installed on the outer side of the transition plate, the equivalent homologous pointer and the ruler scale in the automatic and manual control modes ensure the equivalent control of the rail bottom mold position in the two modes; the manual operation end of the push rod has a quick-release flange structure, the push rod is detachably connected to the extension section push rod through the quick-release flange structure.

[0010] In the above technical solution, further: the push rod is a double-rod balancing structure that is parallel and spaced apart from each other up and down; the outer ends of the push rods of the double-rod balancing structure share a push handle.

[0011] In the above technical scheme, further: the power input end of the mold connection part has a vertically arranged embedded plate, and a U-shaped groove is formed in the middle of the vertical side wall inside the embedded plate; the servo cylinder execution end is provided with a horizontally arranged T-shaped embedded joint; the horizontal rod body of the T-shaped embedded joint is adapted to be inserted into the U-shaped groove, and the vertical part of the end of the T-shaped embedded joint is clamped in the U-shaped groove, so as to realize the detachable connection between the servo cylinder execution end and the embedded plate through the T-shaped embedded joint.

[0012] In the above technical solution, further: one side of the embedded plate is fixedly connected to the push rod power output end; the other side of the embedded plate is connected to the rail bottom rolling mold through the L-shaped corner rod body assembly.

[0013] In the above technical scheme, further: the L-shaped corner rod body assembly is composed of a transverse connecting rod, a longitudinal connecting rod, a transverse corner, a longitudinal right-angle corner, and a radial free-moving interface; wherein the transverse corner is connected to the embedded plate; the transverse connecting rod power input end is inserted into the transverse through hole of the transverse corner, and the transverse connecting rod power input end is adjusted to laterally adjust and lock the distance between the center line of the rail bottom rolling mold and the center line of the servo cylinder stroke; the transverse connecting rod power output end is inserted into one end of the longitudinal right-angle corner, and the longitudinal connecting rod power input end is inserted into the longitudinal through hole at the other end of the longitudinal right-angle corner; the longitudinal connecting rod power output end is threadedly connected to the outer end of the axial center line of the rail bottom rolling mold through the radial free-moving interface; the longitudinal right-angle corner and the longitudinal connecting rod 7 are used to adjust and lock the longitudinal mold position of the rail bottom rolling mold.

[0014] In the above technical solution, further: the radial free movable interface has an external square structure; one end of the radial free movable interface is rotatably connected to the power output end of the longitudinal connecting rod; the other end of the radial free movable interface is provided with an external threaded rod; the external threaded rod is screwed to fit the internal threaded hole provided in the center of the end of the rolling and pressing mold at the bottom of the connecting rail.

[0015] In the above technical scheme, further: a threaded rod I is formed at the outer end of the transverse corner; the transverse corner is connected to the adjustment locking threaded sleeve provided on the vertical side wall of the embedded plate through the threaded rod I; the longitudinal connecting rod is inserted into the longitudinal right-angle corner, and the insertion end of the longitudinal connecting rod is formed with a threaded rod II; the threaded rod II is screwed and matched to connect the two adjustment locking threaded sleeves provided at the outer end of the longitudinal right-angle corner; the two adjustment locking threaded sleeves are used to lock the longitudinal position of the longitudinal connecting rod.

[0016] The advantages of the present invention compared with the prior art are:

[0017] 1. The automated operation mode of the rail bottom mold of the present invention can ensure the quality of rail bottom forming, improve production efficiency, ensure the accuracy of rail bottom forming positioning, realize quantitative production, improve the accuracy and coordination of motion control, completely eliminate the problem of product quality fluctuation caused by manual operation, and realize the automated operation of the rail bottom mold.

[0018] 2. When the rail bottom mold of the present invention is in automatic mode, the servo mechanism sets the point parameters according to the process steps of the rail bottom mold, and interlocks its point action with the operation of the press, forming an automatic control mode with the mold action as the core and the press operation as the node, thereby improving work efficiency, ensuring product quality, and improving the working environment. When the rail bottom mold of the present invention is in manual mode, the rail bottom rolling plate performs position operation according to the plate number button, and works together with the scale line to ensure accurate parking position, so that when a fault is repaired, it can be switched to manual rolling operation in time to avoid production stoppage.

[0019] 3. The push rod of the present invention has anti-deformation and anti-fatigue properties, and can strictly control its inertia and elastic deformation; the protective cover of the present invention has dustproof, shock-resistant and heat-insulating properties, and can fully adapt to the working environment.

[0020] 4. The present invention can fundamentally stabilize product quality, production efficiency and optimize the controllability of mold forming process, create a quantitative operating space for material forming and process control in terms of temperature, time, pressure, speed, connection action, position and integration, and greatly improve the process control of forging process.

[0021] 5. The present invention has a reasonable structure, is simple and practical, has strong versatility, is easy to install and maintain, is convenient to design and construct, is suitable for the production of rail turnouts, and can be widely used in the field of rail heel and end forging; it has broad potential for promotion and application in the turnout industry and related press multi-platform fields, and is a form of equipment development that the industry has been longing for for many years. It is of great significance to improve the application level of industry equipment and promote the advancement of turnout processing technology.

[0022] 6. The present invention is fully applicable to working conditions such as high temperature, high oil smoke, high shift production, high noise, high vibration, high frequency, long-distance vision, and long-lasting labor intensity. It solves the problem that the original manual operation has always been difficult to stabilize and sustain the physical strength, persistence, precision, continuity, and coordination of different workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A three-dimensional diagram of the use state of the present invention after being applied to a composite extrusion die and a press;

[0024] Figure 2 for Figure 1 A three-dimensional diagram of the composite extrusion die;

[0025] Figure 3 It is a schematic diagram of the longitudinal section structure of the composite extrusion die in the mold closing state;

[0026] Figure 4 This is a diagram showing the use status of the composite extrusion die blanking station;

[0027] Figure 5 This is the usage status diagram of the composite extrusion die shaping station;

[0028] Figure 6 for Figure 4 Figure 5 Schematic diagram of the installation structure of the middle rail waist pre-forging die and the rail waist final forging die on the die changing frame;

[0029] Figure 7 Install the main view for one side of the rail waist mold;

[0030] Figure 8Install the main view for the other side of the rail waist mold;

[0031] Fig. 9 for Figure 7 Figure 8 A length section view of the adjustable mounting screw of the middle rail waist mold;

[0032] Fig.10 for Figure 7 Figure 8 Another length section view of the adjustable mounting screw of the middle rail waist mold;

[0033] Fig.11 It is a longitudinal section diagram of a rail bottom mold with a push rod connected by thread;

[0034] Fig.12 It is a schematic diagram of an application embodiment of a rail bottom rolling mold with five stations and five rolling stop positions;

[0035] Fig.13 It is the stroke curve, pressure curve and composite extrusion die station curve of the press;

[0036] Fig.14 It is a partial stereoscopic diagram of the push rod of the present invention;

[0037] Fig.15 A three-dimensional diagram of a rolling mold for the bottom of a push rod connecting rail according to the present invention;

[0038] Fig.16 A bottom perspective view of the composite extrusion die of the present invention;

[0039] Fig.17 A three-dimensional diagram of the protective cover of the servo cylinder of the present invention;

[0040] Fig.18 It is a schematic diagram of the three-dimensional structure of the present invention;

[0041] Fig.19 for Fig.18 A schematic diagram of the enlarged detail structure of part A;

[0042] Fig. 20 for Fig.18 A schematic diagram of the enlarged detail structure of part B;

[0043] Fig.21 It is a schematic diagram of the inner three-dimensional structure of the present invention;

[0044] Fig. 22 for Fig.21 Schematic diagram of the enlarged detail structure of part C;

[0045] Fig.23 for Fig.18 A schematic diagram of the enlarged detail structure of the D portion;

[0046] In the figure: 1-compound extrusion die, 2-press machine; 3-upper die frame, 4-bidirectional cylinder, 5-servo cylinder, 6-internal threaded hole, 7-push rod, 8-axial guide sleeve, 9-screw, 10-transition plate, 11-rail head die, 12-rail waist pre-forging die, 13-rail waist final forging die, 14-rail bottom rolling die, 15-rail bottom shaping die, 16-lifting ear; 101-die platform, 102-platform front extension section, 103-platform rear extension section, 104-blank making station, 105-shaping station, 106-die changing frame; 301-T-type slide; 5-1 circumferential reinforcement, 5-2 Protective cover, 5-3 T-type embedded joint; 601-rail bottom mold connecting plate, 602-rail bottom mold mounting screws; 7-1 Ruler scale, 7-2 Equivalent same-body pointer, 7-3 Quick-release flange structure, 7-4 Extension push rod; 702-Push handle; 703-Mold connecting part; 7031-Embedded plate, 7032-U-shaped groove; 7033-Horizontal connecting rod, 7034-Longitudinal connecting rod, 7035-Horizontal corner, 7036-Longitudinal right-angle corner, 7037-Radial free-moving interface; 7038-Adjustment and locking threaded sleeve; 901-Three-hole connecting rod, 902-Retaining ring. DETAILED DESCRIPTION

[0047] The following will be combined with the attached embodiment of the present invention Figure 1-23 , the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] (like Fig.14 Combination Fig.15 The operating mechanism of the special-shaped rail forging bottom mold is shown in the figure, which comprises an upper mold frame 3; the center of the bottom rear end of the upper mold frame 3 is axially slidably adapted to install the rail bottom rolling mold 14.

[0049] In the above embodiment, further: a T-shaped slot 301 is provided at the center of the bottom rear end of the upper mold frame 3; the rail bottom pressing mold 14 is slidably and frictionally adapted to the T-shaped slot 301 to linearly move along the central axis of the upper mold frame 3. The T-shaped slot 301 is added to prevent the problem of partial load when changing the mold.

[0050] (like Fig.18As shown in the figure, a servo cylinder 5 is arranged at the side of the bottom of the upper mold frame 3, which is spaced and parallel to the rail bottom rolling mold 14. The servo cylinder 5 is spaced and parallel to the rail bottom rolling mold 14, and the servo cylinder 5 performs a telescopic action on the rail bottom rolling mold 14 along the axial direction. The main principle is: the power, speed, position and control signal transmission communication of the rail bottom mold are realized through the servo cylinder 5. At the same time: the servo cylinder 5 is spaced and parallel to the side, so that the servo cylinder 5 avoids interference with other auxiliary equipment of the mold: such as avoiding interference with the feeding system, graphite spray lubrication system, mold change system, and forging demolding auxiliary system.

[0051] (like Fig.21 In the above embodiment, further: a plurality of circumferential reinforcement members 5-1 are evenly distributed and spaced at equal intervals on the outside of the servo cylinder body 5; the servo cylinder body 5 is reinforced and installed by the circumferential reinforcement members 5-1.

[0052] It can be seen that the multiple peripheral reinforcement pieces 5-1 enable the servo cylinder 5 to fully adapt to vibration conditions such as up and down movement of the press, pressure loading, and workpiece demoulding during the forging process, ensuring that the cylinder is installed firmly and securely.

[0053] (like Fig.17 The protective cover 5-2 is provided on the outside of the servo cylinder 5; the protective cover 5-2 is used to isolate high-temperature steam, heat radiation, heat convection, workpiece oxide scale dust and debris and foreign matter. It simply uses the shape of the protective cover 5-2 to prevent the rails, molds, and graphite vapor from rising and directly contacting the servo cylinder 5, thereby playing a certain role in isolating heat sources, water vapor, oil stains, and flying dust.

[0054] In addition, further: the protective cover 5-2 is provided with an air duct; the air duct is used for air cooling of the servo cylinder 5 in the protective cover 5-2. During use, if the ambient heat flow causes the servo cylinder 5 to malfunction, the air duct is added to guide the clean, normal temperature air flow from the outside into the protective cover 5-2, forming a positive pressure from the inside to the outside, cooling the servo cylinder 5 by air cooling, ensuring its normal working temperature, that is, -10 to 100 degrees Celsius, so as to fully adapt to the working environment.

[0055] (See Fig.18 , Fig.19 ) The actuator end of the servo cylinder 5 is detachably connected to the power input end of the mold connection part 703. The power output end of the mold connection part 703 is connected to the rail bottom rolling mold 14. The aforementioned power input end of the mold connection part 703 is also connected to the actuator end of the push rod 7; when the actuator end of the servo cylinder 5 is removed from the power input end of the mold connection part 703, the push rod 7 is used to manually push and pull the axial linear displacement of the rail bottom rolling mold 14.

[0056] The present invention fully retains the manual operation functionality of the existing manually operated push rod 7, and its operation does not interfere with the automatic use function of the automatic mode structure, so that when a fault is repaired, it can be switched to the manual rolling operation mode in time to avoid production stoppage and improve production capacity.

[0057] (like Fig.18 As shown in the above embodiment, further: the transition plate 10 is detachably installed by fastening the lifting holes on the side of the upper mold frame 3, and the transition plate 10 carries the actuators related to the servo cylinder 5 and the push rod 7.

[0058] It can be seen that the transition plate 10 is installed at the original lifting hole position of the upper mold frame 3, so as to realize the non-interference, non-processing, non-welding and non-destructive installation between the servo cylinder 5 and the upper mold frame 3, and the disassembly and assembly are convenient. The servo cylinder 5 and the actuators related to the push rod 7 are all installed on the transition plate 10, and different mold frame tooling can meet the disassembly and assembly requirements of different types of molds by adjusting or replacing the transition plate 10.

[0059] On this basis: the transition plate 10 is provided with a lifting lug 11, which is used for lifting the transition plate 10 and the bearing components thereon after the transition plate 10 and the bearing components thereon are removed as a whole, so as to realize the transfer of the whole mechanism, which is convenient, fast and efficient.

[0060] (like Fig.21 As shown in the figure, the transition plate 10 is fixed with multiple axial guide sleeves 8, and the push rod 7 is coaxially slidingly frictionally adapted with the multiple axial guide sleeves 8. At least two guide sleeves 8 are set in the stroke range, which ensures the guiding accuracy while greatly reducing the guiding friction, and provides linear guidance, which is convenient for stable displacement control of the mold.

[0061] (like Fig. 20 As shown in the figure, a scale mark 7-1 is arranged on the push rod 7, and the scale mark 7-1 is equipped with an equivalent same-body pointer 7-2, and the equivalent same-body pointer 7-2 is fixedly installed on the outer side of the transition plate 10.

[0062] The equivalent same-body pointer 7-2 and the ruler scale 7-1 in the automatic and manual control modes ensure equivalent control of the rail bottom mold position in the two modes, ensuring the consistency of product quality produced in the manual mode.

[0063] (like Fig.18 , Fig.21The manual operation end of the push rod 7 is provided with a quick-release flange structure 7-3, and the push rod 7 is detachably connected to the extension push rod 7-4 through the quick-release flange structure 7-3. The quick-release flange structure 7-3 facilitates the organic combination and smooth transition between the present invention and the original manual operation push rod. On the basis of the fixed installation of the servo cylinder body, the present invention fully considers the linear guide, reliable connection and operation part of the push rod 7. The quick-release flange structure 7-3 is arranged outside the original human operation end of the servo cylinder body, and the extension push rod 7-4 is connected through the quick-release flange structure 7-3, which is convenient for long-distance operation, without interference, away from high temperature areas, and the operating environment is more comfortable and safe.

[0064] It should be noted that the extension push rod 7-4 at the rear end of the quick-release flange structure 7-3 is connected by a simple screw to realize the function of installing and disassembling the extension push rod as needed and the quick release function after use. In the automatic mode, that is, when the servo cylinder 5 is driving the operation, no extension push rod 7-4 is installed on the outside of the flange. When the equipment fails and cannot be repaired in time, the manual extension push rod 7-4 will be installed for emergency to realize manual emergency operation. In addition, during the equipment debugging stage, the matching and debugging stage of the automatic operation mode of the equipment and the original manual mode, during the matching learning process, the operation mode of the manual push rod 7 is equivalent to the automatic operation position of the servo cylinder 5, which is convenient for exploring the parameter formula driven by the servo cylinder 5, making the operation and debugging of the servo cylinder 5 equipment more reliable and convenient. On the one hand, it is convenient for manual recovery of the position and parameters of the rail bottom mold in the early stage of the project, and at the same time, the parameters are refined in advance for the later automation; on the other hand, during the automatic operation, sudden situations are handled and conditions are provided for timely recovery of manual operation, realizing the combination of automatic and manual, as well as the equivalent and effective functions of the mold control in automatic and manual modes.

[0065] In the above embodiment, further: the push rod 7 is a double-rod balance structure with a vertical interval and parallel to each other; the outer ends of the push rod 7 of the double-rod balance structure share a push handle 702. The linear guide of the servo cylinder 5 adopts a double-rod balance structure, which greatly increases the guide stability of the push rod compared to the single-rod method, and at the same time improves the rigidity of the push rod structure to prevent the push rod from breaking.

[0066] (like Fig.19 , Fig. 22In the above embodiment, further: the power input end of the mold connection part 703 has a vertically arranged embedded plate 7031, and a U-shaped groove 7032 is formed in the middle of the vertical side wall inside the embedded plate 7031; the execution end of the servo cylinder 5 is provided with a horizontally arranged T-shaped embedded joint 5-3; the horizontal rod body of the T-shaped embedded joint 5-3 is adapted to be inserted into the U-shaped groove 7032, and the vertical part of the end of the T-shaped embedded joint 5-3 is clamped in the U-shaped groove 7032, so as to realize the detachable connection between the execution end of the servo cylinder 5 and the embedded plate 7031 through the T-shaped embedded joint 5-3. The embedded form can make the execution end of the servo cylinder 5 loose at any time to complete the switching between the manual mode and the automatic mode.

[0067] It can also be seen that after the mounting plate 7031 removes the actuator end of the servo cylinder 5 from the U-shaped groove 7032, the servo cylinder 5 is no longer integrally connected to the push rod 7, and the push rod 7 is manually pushed and pulled to realize the power drive of the rail bottom mold. In this way, the power switching and mode switching between manual and servo cylinder 5 driving are realized, thereby realizing the human emergency handling function of sudden situations.

[0068] In addition, the automatic servo port of the servo cylinder 5 adopts the form of an embedded plate 7031 connected to a T-shaped embedded joint 5-3, which effectively reduces the structural design space and can realize the rapid switching of the automatic and manual push rod modes of the servo cylinder 5 to prepare for emergencies.

[0069] (like Fig.18 ) In the above embodiment, further: one side of the embedded plate 7031 is fixedly connected to the power output end of the push rod 7; the other side of the embedded plate 7031 is connected to the rail bottom rolling mold 14 through the L-shaped corner rod body assembly. The L-shaped corner rod body assembly is used to connect the rail bottom rolling mold 14, which can achieve interference-free installation.

[0070] (like Fig.19 ) In the above embodiment, further: the L-shaped corner rod body assembly is composed of a transverse connecting rod 7033, a longitudinal connecting rod 7034, a transverse corner 7035, a longitudinal right-angle corner 7036, and a radial free movement interface 7037.

[0071] Among them, the transverse corner 7035 is connected to the embedded plate 7031; the power input end of the transverse connecting rod 7033 is inserted into the transverse through hole of the transverse corner 7035, and the power input end of the transverse connecting rod 7033 is adjusted to laterally adjust and lock the distance between the center line of the rail bottom rolling mold 14 and the stroke center line of the servo cylinder 5; the power output end of the transverse connecting rod 7033 is inserted into one end of the longitudinal right-angle corner 7036, and the power input end of the longitudinal connecting rod 7034 is inserted into the longitudinal through hole at the other end of the longitudinal right-angle corner 7036; the power output end of the longitudinal connecting rod 7034 is threadedly connected to the outer end of the axial center line of the rail bottom rolling mold 14 through the radial free movable interface 7037; the longitudinal right-angle corner 7036 and the longitudinal connecting rod 7034 are used to adjust and lock the longitudinal mold position of the rail bottom rolling mold 14.

[0072] The connection structure of the L-shaped corner rod assembly between the servo cylinder 5 and the rail bottom rolling mold 14: the lateral corner 7035 and the longitudinal right-angle corner 7036 can realize the distance adjustment of the longitudinal and transverse connecting rods in multiple length directions at each corner position, so as to meet the flexible adaptation and adjustment of the center distance and height distance between the rail bottom rolling mold 14 and the push rod mechanism caused by the T-shaped slide groove 301 of the rail bottom rolling mold 14 and the changes in the appearance of different upper mold frames 3 in actual working conditions; ensure the connection reliability and the adaptability and adjustability between different mold frames, ensure that the operating accuracy of the servo cylinder 5 fully acts on the control accuracy of the rail bottom mold, and improve the stability and consistency of product quality.

[0073] (like Fig.23 As shown in the above embodiment, further: the radial free movable interface 7037 has an external square structure; specifically, it can be an external hexagonal structure. The external hexagonal structure is adopted so that the movable wrench can be disassembled and installed. If a round shape is adopted, there is a problem of inconvenient operation of the pipe clamp.

[0074] In addition, one end of the radial free-moving interface 7037 is rotatably connected, such as a universal ball head structure, which is radially rotatably connected to the power output end of the longitudinal connecting rod 7034; the other end of the radial free-moving interface 7037 is formed with an external threaded rod; the external threaded rod is screwed to fit the internal threaded hole 6 (combined with the internal threaded hole 6) formed at the center of the end of the rolling mold 14 at the bottom of the connecting rail Fig.11 ).

[0075] With this structure, in order to facilitate the replacement of the rail bottom rolling mold 14 in a high temperature state, the mold connection end is designed as a radial free movable interface 7037. Combined with the hexagonal structure of the outer shape, it is very convenient to screw and disassemble the radial free movable interface 7037. It is not necessary to disassemble the nodes of each L-shaped corner rod body assembly. It is only necessary to screw the radial free movable interface 7037. The front-to-back relative position of the L-shaped corner rod body assembly and the mold connection is inconvenient to maintain, and the radial free movable interface 7037 can be rotated in situ, thereby realizing the disassembly of the external threaded rod at the power output end of the L-shaped corner rod body assembly from the internal threaded hole 6 of the mold, so as to use tools to quickly disassemble or connect the mold; at the same time, it can also effectively avoid the breakage of the mold connection root. The problem of hanging and sagging, push-pull bending, corner breakage, guide jamming, and inability to adapt to adjustment caused by the poor rigidity of the original push rod caused by the simple bending structure of the push rod is fully solved.

[0076] (like Fig.19 ) In the above embodiment, further: a threaded rod I is formed on the outer end of the transverse corner 7035; the transverse corner 7035 is connected to the adjustment locking threaded sleeve 7038 provided on the vertical side wall of the embedded plate 7031 through the threaded rod I; the longitudinal connecting rod 7034 is inserted into the longitudinal right-angle corner 7036, and the insertion end of the longitudinal connecting rod 7034 is formed with a threaded rod II; the threaded rod II is screwed and matched to connect the two adjustment locking threaded sleeves 7038 provided on the outer end of the longitudinal right-angle corner 7036; the two adjustment locking threaded sleeves 7038 are used to lock the longitudinal position of the longitudinal connecting rod 7034.

[0077] In addition to the above-mentioned use of two adjustment locking screw sleeves 7038 to achieve the locking of the adjusted position of the longitudinal connecting rod 7034, the transverse corner 7035 and the longitudinal right-angle corner 7036 of the present invention can also achieve the locking of the longitudinal connecting rod and the transverse connecting rod after the position adjustment by installing a set screw. That is, each corner structure has an axis passing through the corner through hole so that the set screw can be loosened during adjustment to achieve the telescopic adjustment of the rod body; after the adjustment is completed, the set screw is screwed in to achieve the position locking. The two corner connection devices are specially designed to achieve the adaptation adjustment of different molds.

[0078] From the above description, it can be found that the present invention proposes a servo-online same-body rail bottom mold operating mechanism design that can achieve quantified position of the rail bottom rolling mold, controllable speed, online action, and coexistence of automatic and emergency manual operations.

[0079] When applying: (such as Figure 1 The operating mechanism of the special-shaped rail forging bottom die (as shown) also needs to be equipped with an automatic operating system for the compound extrusion die; the working step rhythm of the automatic operating system for the compound extrusion die is interlocked with the working step rhythm signal of the press system.

[0080] Signals in signal interlocking refer to the position of each module monomer and the pressure actuator of the press in the composite extrusion die 1, the operation and position signals of the mechanical structure action; signal interlocking is to enable information communication between each module monomer and the pressure actuator of the press so as to collaborate to complete the process action. Interlocking means that it is set logically to avoid misoperation, interference with equipment operation caused by misoperation, and to avoid safety operation hazards caused by human or accidental situations, that is, to artificially set the execution logic of two-choice, so that a considerable part of the execution actions cannot be performed synchronously by multiple machines, so as to achieve a certain execution control logic command, thereby effectively avoiding misoperation.

[0081] (Combined Figure 2 ) The composite extrusion die automatic operating system has a composite extrusion die 1, and the composite extrusion die automatic operating system also has a composite extrusion die controller; the press system has a press 2, and the press system also has a press controller.

[0082] The controllers referred to here are all programmable logic controllers PLC. The composite extrusion die automatic operating system is connected to the press system as a whole. Specifically: transmitters (devices that send electrical signals) can be set at each node position of the composite extrusion die 1 and the press 2. The transmitters can be servo motors, cylinders, proximity switches and photoelectric switches, as well as transmitters of position signal reporting points manually set by the servo system. Each transmitter at the reporting point is related to the mechanics and electrical of the entire system. The purpose is to achieve logical control of precise steps and realize synchronous, coordinated and continuous forging operations with the composite extrusion die 1 as the core and the press 2 as the auxiliary.

[0083] The press machine 2 establishes a mold closing step formula according to the height position of the composite extrusion die 1, the work station operation sequence number of the composite extrusion die 1, and the pressure values ​​of different steps of the composite extrusion die 1; multiple mold closing step formulas are integrated to form an automatic composite extrusion process; the composite extrusion die automatic operation system and the press system complete the multi-step mold closing operation forging production of special-shaped rails according to the automatic composite extrusion process.

[0084] Specifically, see Table 1: Mold closing step formula table

[0085]

[0086]

[0087] It should be noted that in Table 1, such as mold 1-1, refers to the name of a mold combination, which is composed of multiple molds and molded. The other mold numbers are similar. Different molds have different functions and parameters. Since the rail needs to be heated for two times, for the convenience of management, some of the same mold combinations are defined according to different times to avoid confusion.

[0088] In Table 1: The corresponding combinations of molds for stations 1-1 to 2-7 have been given in Table 4: Rail waist mold change and station formula table described later, which has the same meaning. The serial number of the station is a numbering method for the logical arrangement of process actions. 1-X represents the station action of the first heating of the rail part, and X represents the number of stations after the first heating; 2-Y is the same. The station shown in this article is a forging step of the mold, and can also be qualitatively understood as a forging station. The difference between different stations lies in the different combinations of molds, different working positions of the molds, and different clamping parameters of the press.

[0089] Table 2: Rail bottom rolling die blank making point parameter setting scheme: (combined with Fig.12 )

[0090]

[0091] See Table 2 and the attached manual. Figure 2 , Fig.12 The rail bottom rolling die 14 and the rail bottom shaping die 15 share a T-shaped chute 301 described later. The two enter the T-shaped chute 301 in different directions. The rail bottom rolling die 14 is installed in the direction of the raw material of the press 2 and enters the working position from the back to the front; the rail bottom shaping die 15 is installed in front of the press 2 and enters the working position from the front to the back.

[0092] The 14-point parameters of the rail bottom rolling die in Table 2 should be understood as (combined with Fig.12 ): The rail bottom pressing plate moves to position 230 for the first time, to position 341 for the second time, to position 452 for the third time, and so on. The horizontal movement of the rail bottom pressing mold 14 can also be achieved by pushing and pulling the manual push rod 7. The rail bottom shaping mold 15 does not need to be manually pushed and pulled because of its heavy weight.

[0093] Table 3: Rail bottom rolling die blank making point parameters and action formula plan table:

[0094]

[0095]

[0096] It should be noted in Table 3 that the action sequence, whether 12345 or 54321, is a specific process step, and its action sequence is related to the process development metal plastic forming principle. Regardless of the action sequence of the steps, it is actually a billet making step, and its rationality is for the purpose of billet making.

[0097] Table 4: Rail waist mold change and workstation formula table:

[0098]

[0099]

[0100] In Table 4, the effect of the recovery station is to return the mold to its zero position, that is, one fire operation is completed. In order to avoid omissions and facilitate program simplification, the mold is restored to its zero position.

[0101] The present invention can realize the automated continuous production of the process technology level of the movable-block composite extrusion die, making a major breakthrough in the long-standing multi-person collaborative application mode; it meets the company's accumulated experience in the technology of movable-block composite extrusion dies and can apply higher-level, higher-efficiency and higher-reliability production.

[0102] (like Figure 2 , Figure 3 As shown in the above embodiment, further: the composite extrusion die 1 is composed of a rail head die 11, a rail waist pre-forging die 12, a rail waist final forging die 13, a rail bottom rolling die 14, and a rail bottom shaping die 15.

[0103] Among them, the rail waist pre-forging die 12, the rail waist final forging die 13, the rail bottom rolling die 14, and the rail bottom shaping die 15 constitute a die changing system, which is the main improvement of the present invention. The die changing system is used to realize the position, type, die switching speed and action of the dies required for different stations, and form a die closing step formula. Multiple die closing step formulas are integrated to complete the multi-step die changing operation of the composite extrusion process.

[0104] It should be noted that the die changing structure of the rail waist pre-forging die 12 and the rail waist final forging die 13 is an introductory die changing device, see Chinese patent No. ZL201420260003.4.

[0105] After the specific application of the present invention: the composite extrusion production process based on the movable block composite extrusion die can fundamentally stabilize the product quality and improve the production efficiency compared with manual operation; it creates quantitative space for material forming and process in terms of temperature, time, pressure, speed, connection action, position and integration, greatly improving the process control of the forging process, and also greatly improving the on-site working environment and work intensity of personnel.

[0106] (like Figure 4 , Figure 5 , Figure 6 As shown in the above embodiment, further: the composite extrusion die 1 has a die platform 101, one end of the die platform 101 is a platform front extension section 102 and the other end is a platform rear extension section 103.

[0107] Between the platform front extension section 102 and the platform rear extension section 103 is the blank making station 104 or the shaping station 105 of the composite extrusion die 1; wherein the composite extrusion die 1 has a die changing frame 106; a rail waist pre-forging die 12 is installed on one side of the die changing frame 106, and a rail waist final forging die 13 is installed on the other side of the die changing frame 106.

[0108] When in use: When the rail waist pre-forging die 12 of the die changing frame 106 moves to Figure 4 When the rail waist final forging die 13 of the die changing frame 106 moves to the blanking station 104, the pre-forging operation is performed. Figure 5 When the shaping station 105 is shown, the final forging operation is performed. Whether it is pre-forging or final forging, the working die center of the composite extrusion die 1 always coincides with the center of the press 2.

[0109] Among them, the blank making step operation when the composite extrusion mold 1 moves to the blank making station 104 accounts for more than 90% of the total step operations of the automatic composite extrusion process; the composite extrusion mold 1 performs the shaping step operation at the shaping station 105 only once per firing; when the composite extrusion mold 1 moves to the blank making station 104 or the shaping station 105; it is used to perform the blank making action or the shaping action respectively.

[0110] In the above embodiment, further: the mold closing step recipe includes mold position parameter information, mold type parameter information, mold switching speed parameter information and mold power parameter information of the composite extrusion mold 1 at the blank making station 101 and the shaping station 102.

[0111] The present invention can quantify the speed, pressure and movement of the equipment, provide convenience for future equipment performance maintenance and daily use management, greatly optimize the use frequency and intensity of the equipment's rated performance, and has great application value in reducing equipment parts loss, reducing maintenance frequency, and reducing fatigue.

[0112] (like Figure 2 In the above embodiment, further: the composite extrusion die 1 includes an upper die frame 3, a rail bottom shaping die 15 is suspended at the front end of the upper die frame 3, and a rail bottom rolling die 14 is suspended at the rear end of the upper die frame 3; the rail bottom shaping die 15 is driven by a bidirectional cylinder 4 to realize the axial suspension slide rail mold change operation of the rail bottom shaping die 15 relative to the upper die frame 3; similarly: the rail bottom rolling die 14 is driven by a servo cylinder 5 (such as Fig.14 As shown in the figure, the rail bottom rolling mold 14 is driven to realize the axial long, short stroke, high precision, high frequency, multi-step and multi-station suspended slide rail mold changing operation relative to the upper mold frame 3.

[0113] (like Fig.11 In the above embodiment, further: the rail bottom shaping mold 15 and the rail bottom pressing mold 14 are connected to the push rod 7 by threads 6 (combined with Fig.15 , Fig.16 ), threaded connection, easy to assemble and debug. Fig.11 In the figure, the rail bottom mold connecting plate 601 is fixedly mounted on the rail bottom mold by rail bottom mold mounting screws 602 .

[0114] The push rod 7 is used to manually operate the axial sliding displacement of the rail bottom shaping die 15 and the rail bottom rolling die 14 relative to the upper die frame 3. When the automatic mode cannot be executed, it can be switched to the manual mode in time to continue forging.

[0115] (like Figure 7 , Figure 8 , Fig. 9 ) In the above embodiment, further: the rail waist pre-forging die 12 and the rail waist final forging die 13 adjust the actual position of the die by adjusting the die mounting screw 9.

[0116] Specifically, the two ends of the rail waist pre-forging die 12 and the rail waist final forging die 13 are respectively provided with screw rods 9, and the length of the screw rods 9 can be replaced and adjusted. By replacing the length of the screw rods 9, the position change and adjustment of the rail waist pre-forging die 12 and the rail waist final forging die 13 of different sizes can be realized. The outer end of the screw rod 9 is connected to the three-hole connecting rod 901, and is fixed by the retaining ring 902. The three-hole connecting rod 901 and the retaining ring 902 are used to realize the mold connection, which is reliable and prevents loosening.

[0117] (See Fig. 9 , Fig.10 ) It should be noted that: the rail waist pre-forging die 12 and the rail waist final forging die 13 adjust the actual position of the die by adjusting the die mounting screw 9. The screw 9 uses the existing annular retaining ring form, and the length of the screw 9 body is divided into four grades of length. With M24*70 and M24*100 hexagonal screws and the existing M24*120 rail head die internal hexagonal mounting screws, the die handle and die spacing can be combined to achieve stepless adjustment from 60mm to 320mm, and the adjustment flexibility is far superior to the original form.

[0118] The rail bottom rolling mold 14 adjusts the actual position of the mold by adjusting parameters; the single-stroke universal action point of the press machine 2 sets the upward, downward, and downward pressure parameters of each cycle according to different working steps, different mold changes, different working positions, different mold closing numbers, and different pressures.

[0119] In the above embodiment, further: the rail waist pre-forging die 12 and the rail waist final forging die 13 are respectively provided with two general action points No. 1 and No. 2. The rail bottom shaping die 15 is provided with two general action points No. 3 and No. 4; the rail bottom rolling die 14 is provided with six special working points No. 5, No. 6, No. 7, No. 8, No. 9, No. 10 and four reserved action points No. 11, No. 12, No. 13, No. 14; the press 2 is provided with No. 15, i.e., a single-stroke general action point, at the upward position; the press 2 is provided with No. 16, i.e., a single-stroke general action point at the downward position; the press 2 is also provided with No. 17, a single-stroke pressurizing general action point.

[0120] It should be noted that: Regarding the action points and working points, the main difference between the action points and working points of different molds lies in the combination of work and the position of the mold during work. Its specific position is determined according to the actual forging process and the specific mold. If necessary, different heating furnace bodies and rail materials also need to be fine-tuned. For specific point information, please refer to Table 1: Mold closing step formula table; and Table 3: Rail bottom rolling mold blank making point parameters and action formula plan table.

[0121] It can be seen that the rhythmicity of the main actions of the basic process of the mold-closing formula and the position setting clarify the connection method and action signaling nodes of each formula. The combination of action rhythmicity, position, connection method and action signaling node realizes the complete logic of automatic control of special-shaped rail forging molds with the content of actions, parameters, positions and coordination between the mold-closing operations, mold station switching and forging steps of many presses, and realizes synchronous, coordinated and continuous automated production with mold control as the core and press operation as the auxiliary.

[0122] Table 5: Signal point setting information table

[0123]

[0124]

[0125] It should be noted that: In Table 5, taking points 16 and 17 as examples: Points 16 and 17 actually represent the lower limit position of the press from the initial height and the maximum limit pressure of the downward process, so that the size control of the mold can be achieved. 1-1 in 16-1-1 in the table corresponds to the mold closing 1-1. In principle, the upward, downward and pressure of the press are different for different mold closing, so as to optimize the configuration parameters of the process and make flexible adjustments. In the table, H1 represents the mold closing height value. F2 represents the pressure value. 15-1-1 (H1-1) corresponds to the name of the upward mold change 1-1 action of the press in point 15.

[0126] The movable block composite extrusion die of the present invention has low cost, mature technology, and high flexibility and adaptability. It is economical, practical and easy to implement in procurement and daily production. It can break through the passive form of the "only four stations" argument of the automated die control process in the field of rail forging and realize automated continuous production of two stations. It can smoothly ensure the automation improvement of the enterprise's equipment process level, reasonable control of production costs, stable and continuous mature technology, and achieve multiple goals with one stone and twice the result with half the effort.

[0127] To sum up, in the automatic mode of the rail bottom rolling mold of the present invention, the servo mechanism sets the position parameters according to the process steps of the rail bottom rolling mold, and connects its position action with the operation of the press to form an automatic control mode with the mold action as the core and the press operation as the node.

[0128] The invention has a reasonable structure, is simple and practical, has strong versatility, is easy to install and maintain, is convenient to design and construct, is suitable for the production of rail turnouts, and can be widely used in the field of rail heel forging. It has a wide potential for promotion and application in the turnout industry and related press multi-platform fields, and is the equipment development form that the industry has been eager for for many years. It has a positive leading demonstration effect, and is of great significance to improving the application level of industry equipment and promoting the progress of turnout processing technology. It is fully suitable for working conditions such as high temperature, high oil smoke, high shift production, high noise, high vibration, high frequency, long-distance vision, and long-lasting labor intensity, solving the original manual operation problems of different workpieces that are always difficult to stabilize and continue to work on physical strength, persistence, precision, continuity, and coordination.

[0129] At the same time, the quality of rail bottom forming is guaranteed, its efficiency, accuracy, quantification, controllability and coordination are improved, the fluctuation of manual operation is completely eliminated, and the quantification and servo properties of rail bottom mold operation and control are realized. In the future, the company will be able to continue to develop at a high level, high efficiency and high reliability in the application of live block mold technology, accumulation of technical experience and application, highlighting the economic, technical, production and experience advantages of the invention, and promoting the sustainable development of the enterprise.

[0130] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0131] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. The operating mechanism of the special-shaped rail forging bottom die is characterized by: The invention comprises an upper mold frame (3); the center of the bottom rear end of the upper mold frame (3) is adapted to slide axially and install a rail bottom pressing mold (14); a servo cylinder (5) is provided at the side of the bottom of the upper mold frame (3) and is spaced and parallel to the rail bottom pressing mold (14); the servo cylinder (5) performs a telescopic action on the rail bottom pressing mold (14) along the axial direction; the execution end of the servo cylinder (5) is detachably connected to the power input end of the mold connection part (703); the power output end of the mold connection part (703) is connected to the rail bottom pressing mold (14); the power input end of the mold connection part (703) is also connected to the execution end of a push rod (7); when the execution end of the servo cylinder (5) is removed from the power input end of the mold connection part (703), the push rod (7) is used to manually push and pull the axial linear displacement of the rail bottom pressing mold (14).

2. According to claim 1, the operating mechanism for the special-shaped rail forging bottom die is characterized in that: A T-shaped slide groove (301) is provided at the center of the bottom of the rear end of the upper mold frame (3); the rail bottom rolling mold (14) is slidingly and frictionally adapted to the T-shaped slide groove (301) to move linearly along the center axis of the upper mold frame (3).

3. The operating mechanism for the special-shaped rail forging bottom die according to claim 1, characterized in that: The outer side of the servo cylinder body (5) is evenly distributed with a plurality of circumferential reinforcement pieces (5-1) at equal intervals; the servo cylinder body (5) is reinforced and installed by the circumferential reinforcement pieces (5-1); the outer side of the servo cylinder body (5) is provided with a protective cover (5-2); the protective cover (5-2) is used to isolate high-temperature steam, heat radiation, heat convection, workpiece oxide scale, dust and debris, and foreign matter; The protective cover (5-2) is provided with an air duct; the air duct is used for air cooling of the servo cylinder (5) in the protective cover (5-2).

4. The operating mechanism for the special-shaped rail forging bottom die according to claim 1 or 2, characterized in that: The upper mold frame (3) is provided with a detachable transition plate (10) fixedly mounted at the side lifting hole position. The transition plate (10) carries and mounts the actuators related to the servo cylinder (5) and the push rod (7). The transition plate (10) is provided with a lifting lug (16). The lifting lug (16) is used for lifting the transition plate (10) and the bearing components thereon after the transition plate (10) and the bearing components thereon are removed as a whole. The transition plate (10) is fixedly mounted with a plurality of axial guide sleeves (8). The push rod (7) and the plurality of axial guide sleeves (8) are coaxially slidably frictionally adapted. The push rod (7) A scale mark (7-1) is provided on the top, and the scale mark (7-1) is equipped with an equivalent homogeneous pointer (7-2). The equivalent homogeneous pointer (7-2) is fixedly installed on the outside of the transition plate (10). The equivalent homogeneous pointer (7-2) and the scale mark (7-1) in the automatic and manual control modes ensure equivalent control of the rail bottom mold position in the two modes; the manual operation end of the push rod (7) has a quick-release flange structure (7-3), and the push rod (7) is detachably connected to the extension section push rod (7-4) through the quick-release flange structure (7-3).

5. The operating mechanism for the special-shaped rail forging bottom die according to claim 4, characterized in that: The push rod (7) is a double-rod balancing structure that is spaced apart and parallel to each other; the outer ends of the push rods (7) of the double-rod balancing structure share a push handle (702).

6. The operating mechanism for the special-shaped rail forging bottom die according to claim 1, characterized in that: The power input end of the mold connection part (703) has a vertically arranged embedded plate (7031), and a U-shaped groove (7032) is formed in the middle of the vertical side wall inside the embedded plate (7031); the execution end of the servo cylinder body (5) is provided with a horizontally arranged T-shaped embedded joint (5-3); the horizontal rod body of the T-shaped embedded joint (5-3) is adapted to be inserted into the U-shaped groove (7032), and the vertical part of the end of the T-shaped embedded joint (5-3) is clamped in the U-shaped groove (7032), so as to realize a detachable connection between the execution end of the servo cylinder body (5) and the embedded plate (7031) through the T-shaped embedded joint (5-3).

7. The operating mechanism for the special-shaped rail forging bottom die according to claim 6, characterized in that: One side of the embedded plate (7031) is fixedly connected to the power output end of the push rod (7); the other side of the embedded plate (7031) is connected to the rail bottom rolling mold (14) via an L-shaped corner rod body assembly.

8. The operating mechanism for the special-shaped rail forging bottom die according to claim 7, characterized in that: The L-shaped corner rod assembly is composed of a transverse connecting rod (7033), a longitudinal connecting rod (7034), a transverse corner (7035), a longitudinal right-angle corner (7036), and a radial free-moving interface (7037); wherein the transverse corner (7035) is connected to the embedded plate (7031); the power input end of the transverse connecting rod (7033) is inserted into the transverse through hole of the transverse corner (7035), and the power input end of the transverse connecting rod (7033) is adjusted to transversely adjust and lock the center line of the rail bottom rolling mold (14) and the stroke center of the servo cylinder (5). The power output end of the transverse connecting rod (7033) is inserted into one end of the longitudinal right-angle corner (7036), and the power input end of the longitudinal connecting rod (7034) is inserted into the longitudinal through hole at the other end of the longitudinal right-angle corner (7036); the power output end of the longitudinal connecting rod (7034) is threadedly connected to the outer end of the axial centerline of the rail bottom rolling mold (14) through a radial free movable interface (7037); the longitudinal right-angle corner (7036) and the longitudinal connecting rod (7034) are used to adjust and lock the longitudinal mold position of the rail bottom rolling mold (14).

9. The operating mechanism for the special-shaped rail forging bottom die according to claim 8, characterized in that: The radial free-moving interface (7037) has an external square structure; one end of the radial free-moving interface (7037) is rotatably connected to the power output end of the longitudinal connecting rod (7034); the other end of the radial free-moving interface (7037) is provided with an external threaded rod; the external threaded rod is screwed to fit the internal threaded hole (6) provided at the center of the end of the rail bottom rolling mold (14).

10. The operating mechanism for the special-shaped rail forging bottom die according to claim 8, characterized in that: The outer end of the transverse corner (7035) is formed with a threaded rod I; the transverse corner (7035) is connected to an adjustment locking threaded sleeve (7038) provided on the vertical side wall of the embedded plate (7031) through the threaded rod I; the longitudinal connecting rod (7034) is inserted into the longitudinal right-angle corner (7036), and the insertion end of the longitudinal connecting rod (7034) is formed with a threaded rod II; the threaded rod II is screwed and matched to connect two adjustment locking threaded sleeves (7038) provided on the outer end of the longitudinal right-angle corner (7036); the two adjustment locking threaded sleeves (7038) are used to lock the longitudinal position of the longitudinal connecting rod (7034).

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