Tube rolling and forging machine

Abstract

The present invention discloses a tube blank rolling and rotary forging machine, including a frame, a driving mechanism, a transmission mechanism and a rolling mechanism. The roller frame of the rolling mechanism includes front and rear side walls, and vertical sliding holes are respectively arranged at symmetrical positions on the two side walls. The two ends of the working roller located on the upper side are matched and sleeved in the corresponding vertical sliding holes through a lifting bearing box, and the two ends of the core roller located on the lower side are matched and sleeved in the corresponding vertical sliding holes through a movable bearing box and a fixed bearing box. The equipment uses centrifugal casting tube blanks as raw materials, and reheats the casting to the forging temperature by using the residual heat of 700℃-800℃. The workpiece is placed in the spinning machine by an operating machine, and the product reaches the required size through the upper roller spinning. The spinning machine can form by spinning once, which is efficient, energy-saving, and the product has uniform wall thickness and small processing allowance.

Description

Technical Field

[0001] The invention belongs to the technical field of pipe processing, and in particular relates to a pipe blank production line forming machine for spinning of waste heat pipe blanks. Background Art

[0002] In the field of electrolytic aluminum, aluminum packages use large-diameter seamless rolled pipes. The traditional tube billet production process is to use a cylindrical billet, punch it after heating, heat it again, insert a mandrel, put it at the support points on both sides, and forge and rotate the billet at the same time. It requires multiple heating and forging, which is inefficient and wastes energy. The products forged by the forging machine have uneven wall thickness, low precision, and large processing volume. Summary of the invention

[0003] In view of the problems of low efficiency and heavy workload in the existing pipe production process, the present invention provides a device for directly spinning a pipe blank containing waste heat in the centrifugal pipe blank making process, so as to achieve the purpose of efficient pipe making and energy saving.

[0004] The solution adopted by the present invention to solve the technical problem is: a tube blank rolling and rotary forging machine, comprising a frame, a driving mechanism, a transmission mechanism and a rolling mechanism.

[0005] The roller frame of the rolling mechanism includes left and right side walls (or frames), and vertical sliding holes are respectively arranged at symmetrical positions on the two side walls. The two ends of the working roller located on the upper side are matched and sleeved in the corresponding vertical sliding holes through the lifting bearing box, and the two ends of the core roller located on the lower side are matched and sleeved in the corresponding vertical sliding holes through the movable bearing box and the fixed bearing box.

[0006] A core roller removing device is installed on the frame located on one side of the movable bearing box, and a core roller installing device is installed on the frame located on one side of the fixed bearing box, wherein the telescopic pushing end of the core roller removing device is fixed on the movable bearing box, and the telescopic pushing end of the core roller installing device is supported under the core roller (two parallel supporting rods are fixed to the telescopic end of the core roller installing device to form a fork-shaped supporting body, which is used to support symmetrical positions on both sides of the core roller and lift it for translation), the core roller removing device and the core roller installing device work alternately to complete the loading and unloading process of the core roller; one end of the working roller is connected to the driving mechanism through a transmission mechanism.

[0007] Controllable lifting mechanisms are respectively installed above the left and right side walls of the roller frame, and the left and right controllable lifting mechanisms respectively drive the lifting bearing box to move synchronously up and down.

[0008] A sizing device is provided at the bottom between the left and right side walls of the roller frame. For example, the sizing device includes a controllable vertical push-pull rod fixed on the bottom plate, the telescopic end of the controllable vertical push-pull rod is connected to a support upward, the support has a V-shaped groove on the upper side, rollers are installed on the two side surfaces of the V-shaped groove, and a guide rod is fixed to the support downward, each guide rod is matched with a guide sleeve set on the bottom plate, and the center of the V-shaped groove is located directly below the core roller. A pressure sensor is installed at the connection between the telescopic end of the controllable vertical push-pull rod and the support.

[0009] A rolling support device is provided on the side of the left and right side walls of the roller frame. For example, the rolling support device includes a controllable extension push-pull rod, a horizontally placed wheel frame is installed at its telescopic end, a side roller is installed in the wheel frame, and the rear end of the controllable extension push-pull rod is installed on the side of the L-shaped rollover frame through the rear seat, and a parallel guide mechanism is provided between the L-shaped rollover frame and the wheel frame. The parallel guide mechanism is a guide sleeve fixed on the side of the L-shaped rollover frame, a guide rod fixed on the rear side of the wheel frame, and the guide rod is matched and fitted in the guide sleeve to slide.

[0010] A rollover clamping mechanism is arranged on the side of the left and right side walls of the roller frame, and the mechanism includes an L-shaped rollover frame, one end of which is hinged to the fixed seat on the roller frame through a pin shaft, and a hinge seat is arranged at the corner to hinge a controllable rollover push-pull rod through a pin shaft, and the end of the controllable rollover push-pull rod is hinged to the fixed seat on the lower roller frame through a pin shaft; a rolling support device is arranged at the lower edge of the other side frame of the L-shaped rollover frame. The rolling support device includes a controllable extension push-pull rod, a horizontally placed wheel frame is installed at its telescopic end, and a side roller is installed in the wheel frame, and the rear end of the controllable extension push-pull rod is installed on the side of the L-shaped rollover frame through a rear seat, and a parallel guide mechanism is arranged between the L-shaped rollover frame and the wheel frame.

[0011] The controllable lifting mechanism is equipped with a servo motor and a worm gear box respectively on the upper side of the left and right side walls of the roller frame, a vertical lifting rod is installed at the top center of the left and right vertical sliding holes, the servo motor shaft is connected to the input end of the worm gear box, the output end of the worm gear box is connected to the top of the lifting rod, and the lower ends of the left and right lifting rods are connected to the corresponding lifting bearing boxes respectively. Furthermore, the output shafts of the left and right worm gear boxes are connected to the synchronous shaft at the same time.

[0012] The core roller drag roller device includes a controllable pushing mechanism installed vertically on the frame, on the top of which an upper pulley is installed through an axle frame. The upper edge height of the upper pulley is consistent with the lower edge height of the core roller. When the core roller moves outward or inward, it can be supported on the upper side of the upper pulley.

[0013] Beneficial effects of the invention: The equipment uses centrifugal casting tube blanks as raw materials, uses the residual heat of 700℃-800℃ of the casting to reheat to the forging temperature, uses the operating machine to put the workpiece into the spinning forming machine, and spins the upper roller to make the product reach the required size. The spinning forming machine can be shaped in one spinning, with high efficiency, energy saving, uniform product wall thickness, and small processing allowance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a side structural diagram of the whole machine of the present invention.

[0015] Figure 2 It is one of the three-dimensional structural diagrams of the whole machine of the present invention.

[0016] Figure 3 yes Figure 2 Left view of .

[0017] Figure 4 It is a schematic diagram of the cooperation between the upper and lower rollers and the tube blank.

[0018] Figure 5 yes Figure 4 Schematic diagram of the three-dimensional state.

[0019] Figure 6 The invention discloses a process flow chart of tube billet spinning combined with the tube billet rolling and rotary forging machine.

[0020] Figure 7 It is a schematic diagram of the coordination between the upper and lower rollers and the length-fixing device.

[0021] Figure 8 This is the second three-dimensional structural diagram of the whole machine of the present invention.

[0022] Fig. 9 It is a structural schematic diagram of the rollover clamping mechanism.

[0023] Fig.10 It is a block diagram of the control system combined with the whole machine.

[0024] Fig.11 It is a schematic diagram comparing the dimensions of the pipe blank before and after spinning.

[0025] Numbers in the figure: 1-motor, 2-gearbox, 3-universal coupling, 4-servo motor, 5-working roller, 6-roller frame, 7-core roller removal device, 8-core roller installation device, 9-core roller, 10-sizing device, 11-rolling support device, 12-core roller drag roller device, 13-frame, 14-base, 15-side rollover frame, 16-motor seat, 17 worm gear box, 18-lifting rod, 19-synchronous shaft, 20-lifting bearing box, 21-movable bearing box, 22-fixed shaft Socket box, 23-tube blank, 24-vertical sliding hole, 25-upper pulley, 26-upper fixed seat, 27-lower fixed seat, 28-controllable flip push-pull rod, 29-hinged seat, 30-bottom plate, 101-controllable vertical push-pull rod, 102-guide sleeve, 103-guide rod, 104-support, 105-V-groove, 106-roller, 111-controllable extension push-pull rod, 112-rear seat, 113-wheel frame, 114-side roller, 115-guide sleeve, 116-guide rod. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0027] Embodiment 1: adopt a kind of Figure 1 The tube blank rolling and rotary forging machine shown in the figure mainly comprises a frame, a driving mechanism, a transmission mechanism and a rolling mechanism, etc., wherein the driving mechanism and the transmission mechanism are: a motor 1, a gearbox 2 and a universal coupling 3.

[0028] The rolling mechanism includes a roll frame 6, a working roll 5, a core roll 9, a servo motor lifting mechanism, a rolling support device and a sizing device.

[0029] The structure of the roller frame 6 is as follows: Figure 3 As shown, the roller frame 6 includes left and right side walls (or frames), and vertical sliding holes 24 are respectively provided at symmetrical positions on the two side walls. Figure 4 As shown, the working roll 5 and its bearing box are located on the upper side, and the core roll 9 and its bearing box are located on the lower side.

[0030] like Figure 2 and Figure 5 As shown, the two ends of the working roll 5 located on the upper side are matched and fitted in the corresponding vertical slide holes 24 through the lifting bearing box 20, and the two ends of the core roll 9 located on the lower side are matched and fitted in the corresponding vertical slide holes 24 through the movable bearing box 21 and the fixed bearing box 22 respectively. The hot tube blank 23 is fitted on the outside of the core roll 9, and the working roll 5 and the core roll 9 form a pressing relationship for the hot tube blank. The bearing box contains a cooling channel, and circulating cooling water is injected into the cooling channel. When each pressure roller is working, the circulating cooling water is kept to continuously cool the corresponding bearing box to ensure the reliable operation of each pressure roller. At the same time, an adjustment mechanism is provided to drive the bearing boxes at both ends of each pressure roller to move vertically.

[0031] like Figure 2and Figure 5 As shown, a core roller removal device 7 is installed on the frame located on one side of the movable bearing box 21, and a core roller installation device 8 is installed on the frame located on one side of the fixed bearing box 22, wherein the telescopic push end of the core roller removal device 7 is fixed on the movable bearing box 21, and the telescopic push end of the core roller installation device 8 is supported under the core roller 9, and the core roller removal device 7 and the core roller installation device 8 work alternately to complete the loading and unloading process of the core roller 9. Among them, two parallel support rods are fixed to the telescopic end of the core roller installation device 8 to form a fork-shaped support body, which is used to support the core roller 9 at symmetrical positions on both sides and lift it for translation.

[0032] like Figure 8 As shown, one end of the working roll 5 is connected to the driving mechanism through a transmission mechanism, that is, the motor 1 drives the working roll 5 to rotate through the gearbox 2 and the universal coupling 3.

[0033] In addition, the machine is also equipped with a core roller and drag roller device, such as Figure 2 The device includes a controllable pushing mechanism vertically mounted on a frame, on the top of which an upper pulley 25 is mounted via an axle frame, the upper edge height of the upper pulley 25 is consistent with the lower edge height of the core roller 9, and the core roller 9 can be supported on the upper side of the upper pulley 25 when moving outward or inward.

[0034] like Figure 2 In the embodiment, controllable lifting mechanisms are respectively installed above the left and right side walls of the roller frame 6, and the left and right controllable lifting mechanisms respectively drive the lifting bearing box 20 to move synchronously. Specifically, as Figure 4 and Figure 5 The controllable lifting mechanism is that the servo motor 4 and the worm gear box 17 are respectively installed above the left and right side walls of the roller frame 6, and the vertical lifting rod 18 is installed at the top center of the left and right vertical sliding holes 24. The rotating shaft of the servo motor 4 is connected to the input end of the worm gear box 17 by transmission, and the output end of the worm gear box 17 is connected to the top of the lifting rod 18 by transmission. The lower ends of the left and right lifting rods 18 are respectively isolated from the corresponding lifting bearing box 20. In order to improve the consistency of the controllable lifting mechanism driving the working roller 5, the output shafts of the left and right worm gear boxes 17 can also be further connected to the synchronous shafts at the same time, such as Figure 2 In the embodiment, the output ends of the left and right worm gear boxes 17 are also provided with a transverse shaft, and the left and right transverse shafts are fixed together by a coupling to form a coaxial structure. The worm gear box includes a worm gear meshing assembly or a speed change spur gear at the same time, and the worm gear box can also be a bevel gear box.

[0035] A rolling support device 11 is provided on the side surfaces of the left and right side walls of the roller frame 6 .

[0036] A sizing device 10 is provided at the bottom between the left and right side walls of the roller frame 6. One form of the sizing device 10 is a bottom plate 30 (such as Figure 2The bottom plate 30 is fixed to the base 14) with a central hole and fixed with a controllable vertical push-pull rod 101. Figure 7 The telescopic end of the controllable vertical push-pull rod 101 is connected to a support 104 upward, and a pressure sensor is installed at the connection. A V-shaped groove 105 is provided on the upper side of the support 104, and rollers 106 are respectively installed on both side surfaces of the V-shaped groove 105. A guide rod 103 is fixed downward on the support 104, and each guide rod 103 is matched with a guide sleeve set on the bottom plate 30 and passes through. The center of the V-shaped groove 105 is located directly below the core roller 9.

[0037] Working process of this machine This machine is a subsequent pipe making equipment based on centrifugal pipe making. The temperature of the pipe billet in the centrifugal pipe making process reaches 1150℃. After the hot pipe billet is transferred to this machine, the residual heat temperature can reach 700-800℃. Therefore, it only needs to be heated once in the offline pipe making process. This machine uses the residual heat of the hot pipe billet to make pipes, which saves the link of heating the pipe billet, improves the pipe making efficiency and reduces energy consumption, reduces the link pollution caused by fuel combustion, and meets environmental protection requirements. When the hot pipe billet with residual heat temperature of 700-800℃ is moved to this machine for processing, after the machine is set up, the spinning pipe process only takes 3 minutes to form, which is efficient and saves manpower.

[0038] like Figure 6 As shown, the telescopic end of the core roller removal device 7 contracts outward, pulling the core roller 9 outward to separate from the left and right side walls of the roller frame 6. The telescopic end of the core roller installation device 8 also contracts outward, causing the fork-shaped support to separate from the left and right side walls of the roller frame 6. The hot tube blank is transferred to the position between the left and right side walls by using the sling, and the telescopic end of the core roller installation device 8 moves inward, so that the fork-shaped support passes through the hot tube blank and is supported under the core roller, lifting the core roller. At this time, the telescopic end of the core roller removal device 7 pushes inward, and the telescopic end of the core roller installation device 8 moves outward, and the two push synchronously, so that the core roller passes through the hot blank, and one axial end of the core roller 9 is inserted into the fixed bearing box 22, and the movable bearing box installed at the other end of the core roller 9 is matched and fitted on the bottom of the vertical slide hole 24. Thereby, the assembly of the hot blank and the pushing of the core roller are completed. During the entire transfer process, the upper pulley on the top of the core roller drag roller device can be supported on the lower surface of the core roller to keep the core roller stable in translation.

[0039] Then the side-turning and pressing mechanism is controlled to retract inwards, and the rolling support device 11 is controlled to extend outwards to press against the side surface of the hot blank.

[0040] like Fig.10, and then the PLC controller controls the motor 1 to drive the working roll 5 to rotate through the gearbox 2 and the universal coupling 3. While the working roll 5 rotates, the PLC controller controls the servo motor 4 to rotate synchronously, providing a slow downward pressure to the lifting bearing boxes 20 at both ends of the working roll, that is, while the working roll 5 rotates, it gradually provides pressure on the hot tube. After the working roll 5 rotates, it transmits the rotational power to the core roll 9 through the hot tube. After the working roll 5 and the core shaft 9 continue to rotate, the diameter of the hot tube continues to increase. The side rollover clamping mechanism and the rolling support device 11 gradually expand outward, but the side rollers are always supported on the outer surface of the tube, cooperating with the tube with an increasing diameter to rotate and provide support.

[0041] During the above rolling process, the sizing device 10 can maintain a fixed position, that is, maintain a set height (or can also provide support for the hot tube billet, as in Example 2). When the diameter of the tube billet increases to the set value, the lower side of the outer diameter of the tube billet is supported on the roller 106 of the sizing device 10, so that the pressure sensor provides a corresponding signal. After receiving the pressure sensor signal, the controller controls the motor to stop working.

[0042] After the motor stops, the telescopic end of the core roller removal device 7 retracts outward, pulling the core roller 9 outward to separate from the left and right side walls of the roller frame 6. The telescopic end of the core roller installation device 8 pushes inward, so that the fork-shaped support body is supported under the core roller 9 and pushes it out of the left and right side walls of the roller frame 6. Then the telescopic end of the core roller installation device 8 also retracts outward, so that the fork-shaped support body is separated from the left and right side walls of the roller frame 6, and then the pipe fittings after rolling are separated from the side walls by using the sling transfer roller.

[0043] Embodiment 2: Based on embodiment 1, a support function can be provided to the hot tube billet. At this time, after the working roll 5 and the mandrel 9 rotate continuously, as the diameter of the hot tube billet continues to increase, the telescopic end of the controllable vertical push-pull rod 101 of the sizing device 10 gradually moves downward, thereby causing the support 104 to gradually move downward with the roller 106, so as to cooperate with the rotation of the tube billet with an increasing diameter and provide support to prevent its deformation. By setting a position sensor on the support 104 of the sizing device 10, when it reaches the set position, the controller receives the position sensor signal and controls the motor to stop working.

[0044] Example 3: Based on Example 1, a rollover clamping mechanism is arranged on the side of the left and right side walls of the roller frame 6, and the mechanism includes an L-shaped rollover frame 15, one end of which is hinged to the fixed seat 26 on the roller frame through a pin, and a hinged seat is arranged at the corner and a controllable rollover push-pull rod 28 is hinged to the fixed seat 27 on the lower roller frame through a pin; a rolling support device 11 is arranged on the lower edge of the other side frame of the L-shaped rollover frame 15.

[0045] The rolling support device 11 comprises a controllable extension push-pull rod 111, a horizontally placed wheel frame 113 is installed at its telescopic end, a side roller 114 is installed in the wheel frame 113, and the rear end of the controllable extension push-pull rod 111 is installed on the side of the L-shaped rollover frame 15 through the rear seat 112, and a parallel guide mechanism is provided between the L-shaped rollover frame 15 and the wheel frame 113. The parallel guide mechanism is a guide sleeve 115 fixed on the side of the L-shaped rollover frame 15, and a guide rod 116 fixed on the rear side of the wheel frame 113, and the guide rod is matched and fitted in the guide sleeve and can slide.

[0046] Example 4: Based on Example 1, the machine is also suitable for secondary heating of tube blanks. The operation process is described as follows:

[0047] 1. After the secondary heating, the tube blank is placed into the frame of the spinning machine by the operating machine;

[0048] 2. The core roller installation device moves, and the drag rod supporting the core roller is sent into the frame;

[0049] 3. The core roller dragging device moves, and the hydraulic cylinder sends its moving parts to the working position;

[0050] 4. The core roller removal device moves, driving the core roller to the working position (the core roller dragging device works in coordination);

[0051] 5. The core roller dragging device and the core roller mounting device return to their original positions, and the core roller removing device is separated from the core roller;

[0052] 6. The worm gear box moves, driving the working roller downward through the lead screw to contact the outer surface of the tube;

[0053] 7. After checking that all devices are normal, the motor starts, and the coupling drives the working roller to move for rolling forging;

[0054] 8. After the tube is rolled to the required size, the main motor stops and the working roller moves up;

[0055] 9. The manipulator grabs the workpiece, and the various devices work together to move the lower roller out, and then the manipulator takes out the workpiece.

[0056] Embodiment 5: Based on any of the above embodiments, Fig.11 The figure shows the comparison of the dimensions of the pipe blank before and after spinning. The controller controls the servo hydraulic cylinder to provide a spinning feed in a progressive manner. The dimensional data of the pipe after each spinning is based on the size and feed of the pipe before spinning to calculate the circumference of the pipe.

[0057] Total weight of tube G = (πr1 2 -πr2 2 )hρ=(πr'1 2 -πr'2 2 )h'ρ→(r12 -r2 2 )h=(r'1 2 -r'2 2 )h';

[0058] Ignore axial ductility:

[0059] r1 2 -r2 2 = r'1 2 -r'2 2 -------------------------------------------------①;

[0060] r1=r2+△d1;-------------------------------------------------------------②;

[0061] r'1=r'2+△d1';-------------------------------------------------③.

[0062] Known numbers: r1 is the outer diameter of the pipe before spinning; r2 is the inner diameter of the pipe before spinning; △d1......△d n ' is the wall thickness of the pipe before spinning; △d1'......△d n ' is the wall thickness of the pipe after spinning (i.e. the distance between the working roll and the core roll, which gradually decreases with the increase of spinning times and is a set fixed value, and n is the number of spinning circles). The distance between the working roll and the core roll can be determined according to the stroke of the private service hydraulic cylinder, or a position distance meter can be added between the working roll and the core roll.

[0063] Therefore, from ①②③, we can get: r'2=(△d1 / △d1')*r2+△d 2 / 2△d1'-1 / 2△d1' 2 , so the inner diameter circumference after spinning = 2πr'2.

[0064] The radius of the mandrel is r0, and the circumference of the mandrel is 2πr0. The mandrel should rotate in a circle and arc after spinning: 2πr'2 / 2πr0=r'2 / r0=((△d1 / △d1')*r2+△d1 2 / 2△d1'-1 / 2△d1' 2 ) / r0.

[0065] Install an encoder on the mandrel and lead the encoder signal line to the controller signal input terminal. When the controller receives the encoder data collected by the mandrel, the rotation circumference and arc are not less than r'2 / r0 (that is, the pipe after spinning rotates for not less than one circle), and controls the servo hydraulic cylinder to push down a spinning feed. The amount of material used for the tube blank is greater than that of the finished pipe, and the wall thickness of the pipe after spinning is slightly greater than that of the finished pipe, leaving a processing allowance.

Claims

1. A tube blank rolling and rotary forging machine, comprising a frame, a driving mechanism, a transmission mechanism and a rolling mechanism, characterized in that: The roller frame (6) of the rolling mechanism comprises left and right side walls, and vertical sliding holes (24) are respectively arranged at symmetrical positions on the side walls. The two ends of the working roller (5) located on the upper side are matched and fitted in the corresponding vertical sliding holes (24) through a lifting bearing box (20), and the two ends of the core roller (9) located on the lower side are matched and fitted in the corresponding vertical sliding holes (24) through a movable bearing box (21) and a fixed bearing box (22). A core roller removal device (7) is installed on the frame located on one side of the movable bearing box (21), and a core roller installation device (8) is installed on the frame located on one side of the fixed bearing box (22), wherein the core roller removal device (7) is installed on the frame located on one side of the movable bearing box (21). The telescopic push end of the device (7) is fixed on the movable bearing box (21), and the telescopic push end of the core roller installation device (8) is supported below the core roller (9). The core roller removal device (7) and the core roller installation device (8) work alternately to complete the loading and unloading process of the core roller (9); one end of the working roller (5) is connected to the driving mechanism through a transmission mechanism; controllable lifting mechanisms are respectively installed above the left and right side walls of the roller frame (6), and the left and right controllable lifting mechanisms respectively drive the lifting bearing box (20) to move synchronously; a sizing device (10) is arranged at the bottom between the left and right side walls of the roller frame (6); The sides of the left and right side walls of the frame (6) are provided with rolling support devices (11); the sizing device (10) comprises a controllable vertical push-pull rod (101) fixed on the bottom plate (30); the telescopic end of the controllable vertical push-pull rod (101) is connected upwardly to a support (104); the support (104) has a V-shaped groove (105) on the upper side; rollers (106) are respectively installed on the side surfaces of the V-shaped groove (105); guide rods (103) are fixed downwardly to the support (104); each guide rod (103) is matched with a guide sleeve set on the bottom plate (30); the center of the V-shaped groove (105) is located at the core roller (9); a pressure sensor is installed at the connection between the telescopic end of the controllable vertical push-pull rod (101) and the support (104); a rollover clamping mechanism is arranged on the side of the left and right side walls of the roller frame (6), and the mechanism includes an L-shaped rollover frame (15), one side frame end of which is hinged to the fixed seat (26) on the roller frame through a pin shaft, and a hinge seat is arranged at the corner and a controllable flip push-pull rod (28) is hinged to the fixed seat (27) on the lower roller frame through a pin shaft; a rolling support device (11) is arranged at the lower edge of the other side frame of the L-shaped rollover frame (15).

2. The tube blank rolling and rotary forging machine according to claim 1, characterized in that: The rolling support device (11) comprises a controllable extension push-pull rod (111), a telescopic end of which is equipped with a horizontally placed wheel frame (113), a side roller (114) is installed inside the wheel frame (113), and the rear end of the controllable extension push-pull rod (111) is installed on the side of the L-shaped rollover frame (15) through a rear seat (112), and a parallel guide mechanism is provided between the L-shaped rollover frame (15) and the wheel frame (113).

3. The tube blank rolling and rotary forging machine according to claim 1, characterized in that: The controllable lifting mechanism is provided with a servo motor (4) and a worm gear box (17) respectively installed above the left and right side walls of the roller frame (6), and a vertical lifting rod (18) is installed at the top center of the left and right vertical sliding holes (24). The rotating shaft of the servo motor (4) is transmission-connected with the input end of the worm gear box (17), and the output end of the worm gear box (17) is transmission-connected with the top of the lifting rod (18). The lower ends of the left and right lifting rods (18) are respectively isolated from the corresponding lifting bearing boxes (20).

4. The tube blank rolling and rotary forging machine according to claim 3, characterized in that: The output shafts of the left and right worm gear boxes (17) are simultaneously connected to a synchronous shaft.

5. The tube blank rolling and rotary forging machine according to claim 1, characterized in that: Two parallel support rods are fixed to the telescopic end of the core roller installation device (8) to form a fork-shaped support body, which is used to support the core roller (9) at symmetrical positions on both sides and lift it for translation.

6. The tube blank rolling and rotary forging machine according to claim 1, characterized in that: The core roller drag roller device comprises a controllable pushing mechanism vertically mounted on a frame, an upper pulley (25) being mounted on the top thereof via an axle frame, the upper edge height of the upper pulley (25) being consistent with the lower edge height of the core roller (9), and the core roller (9) can be supported on the upper side of the upper pulley (25) when moving outward or inward.

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