A pipe high-frequency induction cladding and rolling strengthening composite device and method

Abstract

The application discloses a pipe high-frequency induction cladding and rolling strengthening composite device and method, the device comprises a bed base, a bed fixedly connected with the bed base, a pipe clamping and rotating mechanism, a pipe warm rolling mechanism and a pipe induction cladding mechanism arranged on the bed base and the bed, and the method comprises the following steps: 1, pipe clamping; 2, high-frequency induction cladding; and 3, warm rolling. The application can effectively improve the defects such as pores and bubble inclusion on the surface of a test piece after induction cladding, improve the bonding degree between the cladding layer and the surface of the base, reduce the surface oxidation degree and roughness, effectively reduce the warm rolling cost and energy consumption, improve the surface hardness, residual stress and fatigue life of the test piece after the surface of the test piece is secondarily strengthened, and provide an effective way for solving pipe defect repair and improving the surface performance of the pipe.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of pipe manufacturing, and particularly relates to a pipe high-frequency induction cladding and warm rolling strengthening composite device and method. BACKGROUND

[0002] The induction cladding technology preposes metal powder on a workpiece base, and then utilizes the circular ring effect, adjacent effect and skin effect generated by the alternating electromagnetic field in the induction coil to make the surface of the sample adjacent to the coil generate the same frequency eddy current. The cladding material is continuously heated to the melting point by the current, and after rapid cooling and solidification, atomic migration occurs between the base and the coating layer, and finally the metallurgical bonding effect is achieved. At present, when high-frequency induction cladding is performed, the sample is in an oxygen environment, and the surface of the sample to be cladded is severely oxidized and rough, and the cladding layer cannot meet the requirements of a smooth surface and excellent bonding performance, which seriously affects the cladding effect. Secondly, the coating of the induction cladding coating is usually performed by a manual coating method, but the manual coating often leads to large random errors, resulting in uneven coating, uneven surface, and problems such as "undercooked", "impurity defects and bubbles" in the cladding layer.

[0003] The warm rolling strengthening technology is a kind of surface rolling strengthening technology that heats the material to a temperature below the recrystallization temperature and performs rolling. Compared with traditional processing, the warm rolling technology can only obtain better surface integrity at a suitable temperature of the material. With the increase of temperature, the plasticity of the surface layer of the material is improved, the hardness value and the hardening layer depth are larger, and the fatigue performance is greatly improved. However, the surface quality is reduced, the efficiency is reduced, and a complete heating auxiliary system needs to be introduced, which increases the cost. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a pipe high-frequency induction cladding and warm rolling strengthening composite device and method to effectively improve the defects such as pores, bubbles and undercooking of the surface of the test piece after induction cladding, improve the bonding degree of the cladding layer surface and the base surface, reduce the surface oxidation degree and roughness, effectively reduce the cost and energy consumption of warm rolling, and provide an effective way to repair pipe defects and improve the surface performance of the pipe.

[0005] To solve the above technical problems, the technical scheme adopted by the present application is as follows: a pipe high-frequency induction cladding and warm rolling strengthening composite device, comprising a bed body base, a bed body fixedly connected with the bed body base, a pipe clamping and rotating mechanism, a pipe warm rolling mechanism and a pipe induction cladding mechanism arranged on the bed body base and the bed body.

[0006] The pipe clamping and rotating mechanism comprises a main shaft center set at one end of the pipe, a main shaft center moving mechanism for driving the main shaft center to move, a secondary main shaft center set at the other end of the pipe, and a secondary main shaft center moving mechanism for driving the secondary main shaft center to move; the main shaft center moving mechanism comprises a main shaft servo motor, a driving pulley connected to the output shaft of the main shaft servo motor, and a driven pulley connected to the driving pulley through a synchronous belt, and the main shaft center is connected to the driven pulley; the secondary main shaft center moving mechanism comprises a first servo motor, a first ball screw connected to the output shaft of the first servo motor, and a tailstock connected to the first ball screw through a first ball screw nut, and a secondary main shaft center is installed on the tailstock at the same axial position as the main shaft center,

[0007] The pipe warm rolling mechanism comprises a second servo motor, a second ball screw connected to the output shaft of the second servo motor, and a first sliding plate connected to the second ball screw through a second ball screw nut, and a rolling workbench is installed on the first sliding plate and can move forward and backward on the sliding rail of the first sliding plate, an electric cylinder is installed on the rolling workbench, a rolling head support is connected to the end of the piston rod of the electric cylinder, and a rolling head capable of exerting different degrees of pressure on the surface of the pipe under the action of the electric cylinder is connected to the rolling head support.

[0008] The pipe induction cladding mechanism comprises a third servo motor, a third ball screw connected to the output shaft of the third servo motor, and a second sliding plate connected to the third ball screw through a third ball screw nut, and an induction heating workbench is installed on the second sliding plate and can move forward and backward on the sliding rail of the second sliding plate, and an induction coil capable of heating the surface of the pipe and the surface coating layer is installed on the induction heating workbench.

[0009] The pipe high-frequency induction cladding and rolling strengthening composite device, the main shaft servo motor is fixedly connected to the bed base, and the driven pulley and the main shaft center are assembled and connected by using a bearing retainer and a key.

[0010] The pipe high-frequency induction cladding and rolling strengthening composite device, a protective cover composed of a first lower housing and a first upper housing connected to the top of the first lower housing is arranged on the main shaft center, the first lower housing is fixedly connected to the bed body, and the main shaft center and the first lower housing are assembled and connected by using a bearing and a sleeve.

[0011] The first ball screw is fixed on the bed body through the first supporting seat and the second supporting seat, and the first ball screw is connected to the output shaft of the first servo motor through the first coupling; the protection cover composed of the second lower shell and the second upper shell connected to the top of the second lower shell is arranged on the sub-spindle center, the second lower shell is fixedly connected with the tail seat, and the sub-spindle center is assembled and connected with the sleeve through bearings.

[0012] The second ball screw is fixed on the bed body through the third supporting seat and the fourth supporting seat, and the second ball screw is connected to the output shaft of the second servo motor through the second coupling.

[0013] The third ball screw is fixed on the bed body through the fifth supporting seat and the sixth supporting seat, and the third ball screw is connected to the output shaft of the third servo motor through the third coupling.

[0014] The induction coil is a high-frequency induction copper tubular coil, and the induction coil is provided with a current / cooling water input port and a current / cooling water output port.

[0015] The application also discloses a pipe high-frequency induction cladding and rolling strengthening composite method which can effectively improve the defects such as pores, bubbles and incomplete fusion of the surface of a test piece after induction cladding, improve the bonding degree of the cladding layer surface and the substrate surface, reduce the surface oxidation degree and roughness, and effectively reduce the warm rolling cost and energy consumption by using the residual heat after induction cladding to perform warm rolling on the surface of the test piece.

[0016] Step one, pipe clamping: inserting a mandrel into the pipe and pre-preparing a manual cladding coating on the surface of the pipe, simultaneously rotating the first ball screw by the first servo motor, moving the tail seat by the first ball screw nut threadedly connected to the first ball screw, adjusting the relative positions of the sub-spindle center and the spindle center to be on the same axis, and then clamping and fixing the two ends of the pipe on the threaded spindle center and the sub-spindle center respectively.

[0017] Step two, high frequency induction cladding: the front and back positions of the induction coil are adjusted by the induction heating workbench on the second sliding plate, so that the induction coil is in the same axial position as the pipe; the high frequency induction cladding equipment is turned on, the induction coil inputs and outputs current and cooling water through the current / cooling water input and output ports in real time, which plays a role in heating the pipe and protecting the induction coil, and when the pipe is preheated to the required temperature for induction cladding, the third servo motor drives the third ball screw to drive the second sliding plate connected by the third screw nut, so that the second sliding plate drives the induction coil to move at a constant speed along the axial direction of the pipe, and the pipe surface is continuously heated to form a good metallurgical bonding surface;

[0018] Step three, warm rolling: stop the high frequency induction cladding, and after the pipe surface is naturally cooled to the required temperature range for warm rolling, adjust the front and back positions of the rolling workbench on the first sliding plate, so that the rolling head and the pipe surface are in contact with each other, then fix the position of the rolling workbench, the electric cylinder pushes the rolling head to apply rolling force on the pipe surface, at the same time, the main shaft servo motor drives the driving pulley, the driving pulley drives the driven pulley through the synchronous belt, and then the main shaft center rotates to drive the pipe to rotate; the second ball screw is driven by the second servo motor to rotate, the second screw nut connected with the second ball screw drives the first sliding plate to move, and the rolling workbench on the first sliding plate moves with the first sliding plate, so as to drive the rolling head to warm roll the pipe surface.

[0019] Compared with the prior art, the present application has the following advantages:

[0020] 1. The present application designs a pipe high frequency induction cladding and rolling strengthening composite device based on the concept of green manufacturing, high efficiency, low consumption, low carbon and environmental protection, which provides an effective way to solve pipe defect repair and improve pipe surface performance.

[0021] 2. The present application combines the induction cladding process with the warm rolling process, which can effectively improve the defects such as pores, bubbles and inclusions on the surface of the test piece after induction cladding, improve the bonding degree of the cladding layer and the surface of the substrate, reduce the surface oxidation degree and roughness, and at the same time, the warm rolling on the surface of the test piece using the residual heat after induction cladding can effectively reduce the cost and energy consumption of warm rolling, and the surface hardness, residual stress and fatigue life of the test piece are improved after being strengthened twice.

[0022] 3、In the traditional induction cladding process of pipe, the heating process is always faced with oxygen environment and due to manual coating, often leads to uneven coating, uneven surface, and defects such as undercooking, impurities and bubbles in the cladding layer; when the warm rolling process is simply used for pipe processing, the production efficiency is high, the deformation resistance is low, the formability is good, etc., and at the same time, the disadvantages of large energy consumption, easy oxidation, decarburization, poor surface quality, large grain size, etc. are avoided; in the pipe composite processing process adopted by the present application, the warm rolling reduces the bubble and pore defects brought by the pipe surface after induction cladding, reduces the porosity and improves the smoothness, hardness, fatigue life and residual stress of the pipe surface; both processes are low-cost and green environmental protection processes, and the combination of the two processes reduces the cost of the warm rolling process and improves the quality of the pipe surface repair area.

[0023] The technical solutions of the present application will be further described in detail below by means of the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a perspective view of the pipe high-frequency induction cladding and rolling strengthening composite device of the present application.

[0025] Figure 2 It is a front view of Figure 1 .

[0026] Figure 3 It is a left view of Figure 1 .

[0027] Figure 4 It is a top view of Figure 1 .

[0028] BRIEF DESCRIPTION OF DRAWINGS:

[0029] 1-bed base; 2-main shaft servo motor; 3-main drive pulley;

[0030] 5-synchronous belt; 6-bearing retainer; 7-driven pulley;

[0031] 9-first upper shell; 10-first lower shell; 13-main shaft center;

[0032] 14-current / cold water input; 15-induction coil;

[0033] 16-current / cold water output; 17-induction coil;

[0034] 18-induction heating workbench; 19-pipe; 20-electric cylinder;

[0035] 21-rolling workbench; 22-secondary main shaft center; 24-second upper shell;

[0036] 26—second lower shell; 28—bed; 29—first ball screw;

[0037] 31 - first support seat; 32 - third support seat; 34 - second ball screw;

[0038] 36—tailstock; 39—first slide; 40—second slide;

[0039] 41—second supporting seat; 42—fourth supporting seat; 44—first coupling;

[0040] 45—second coupling; 46—first servo motor; 47—second servo motor;

[0041] 51—third servo motor; 53—third coupling; 54—fifth support seat;

[0042] 55—third ball screw; 56—rolling head; 58—sixth support seat;

[0043] 59—rolling head bracket; 60—second screw nut. DETAILED DESCRIPTION

[0044] like Figures 1-4 As shown, the pipe high-frequency induction cladding and rolling strengthening composite device of this embodiment includes a bed base 1 and a bed 28 fixedly connected to the bed base 1, as well as a pipe clamping and rotating mechanism, a pipe warm rolling mechanism, and a pipe induction cladding mechanism provided on the bed base 1 and the bed 28;

[0045] The pipe clamping and rotating mechanism includes a main spindle top 13 for being arranged at one end of the pipe 19 and a main spindle top motion mechanism for driving the main spindle top 13 to move, and a sub-spindle top 22 for being arranged at the other end of the pipe 19 and a sub-spindle top motion mechanism for driving the sub-spindle top 22 to move; the main spindle top motion mechanism includes a main spindle servo motor 2, a driving pulley 3 connected to the output shaft of the main spindle servo motor 2, and a driven pulley 7 connected to the driving pulley 3 through a synchronous belt 5, and the main spindle top 13 is connected to the driven pulley 7; the sub-spindle top motion mechanism includes a first servo motor 46, a first ball screw 29 connected to the output shaft of the first servo motor 46, and a tail stock 36 connected to the first ball screw 29 through a first screw nut, and the tail stock 36 is equipped with a sub-spindle top 22 on the same axial position as the main spindle top 13.

[0046] The pipe warm rolling mechanism comprises a second servo motor 47, a second ball screw 34 connected to the output shaft of the second servo motor 47, and a first sliding plate 39 connected to the second ball screw 34 through a second screw nut 60, wherein the first sliding plate 39 is provided with a rolling workbench 21 capable of moving forward and backward on the sliding rail of the first sliding plate 39, the rolling workbench 21 is provided with an electric cylinder 20, the piston rod end of the electric cylinder 20 is connected with a rolling head support 59, and the rolling head support 59 is connected with a rolling head 56 capable of moving forward and backward under the power of the electric cylinder 20 to apply different degrees of pressure to the surface of the pipe 19.

[0047] The pipe induction cladding mechanism comprises a third servo motor 51, a third ball screw 55 connected to the output shaft of the third servo motor 51, and a second sliding plate 40 connected to the third ball screw 55 through a third screw nut, wherein the second sliding plate 40 is provided with an induction heating workbench 18 capable of moving forward and backward on the sliding rail of the second sliding plate 40, and the induction heating workbench 18 is provided with an induction coil 15 capable of heating the surface of the pipe 19 and the surface coating layer.

[0048] In specific implementation, the first servo motor 46 and the second servo motor 47 are fixed to one side of the machine bed 28, and the third servo motor 51 is fixed to the other side of the machine bed 28.

[0049] In this embodiment, the main shaft servo motor 2 is fixedly connected to the machine bed base 1, and the driven pulley 7 and the main shaft center 13 are assembled and connected by using a bearing retainer 6 and a key 52.

[0050] In this embodiment, the main shaft center 13 is provided with a protective cover composed of a first lower housing 10 and a first upper housing 9 connected to the top of the first lower housing 10, the first lower housing 10 is fixedly connected to the machine bed 28, and the main shaft center 13 and the first lower housing 10 are assembled and connected by using a bearing and a sleeve.

[0051] In specific implementation, the first lower housing 10 is fixedly connected to the machine bed 28 by using a housing fixing screw 4 and a housing fixing nut 11, one side of the first upper housing 9 and the first lower housing 10 is provided with a first bearing end cover 12, and the first bearing end cover 12 is fixedly connected to the first upper housing 9 or the first lower housing 10 by using a first bearing end cover nut 8.

[0052] In the embodiment, the first ball screw 29 is fixed on the bed 28 through the first support seat 31 and the second support seat 41, and the first ball screw 29 is connected to the output shaft of the first servo motor 46 through the first coupling 44; the sub-spindle center 22 is provided with a protective cover composed of the second lower shell 26 and the second upper shell 24 connected to the top of the second lower shell 26, and the second lower shell 26 is fixedly connected with the tail seat 36, and the sub-spindle center 22 is assembled and connected with the sleeve using bearings.

[0053] In the embodiment, one side of the second upper shell 24 and the second lower shell 26 is provided with the second bearing end cover 23, and the second bearing end cover 23 is fixedly connected with the second upper shell 24 or the second lower shell 26 through the second bearing end cover nut 25.

[0054] In the embodiment, the second ball screw 34 is fixed on the bed 28 through the third support seat 32 and the fourth support seat 42, and the second ball screw 34 is connected to the output shaft of the second servo motor 47 through the second coupling 45.

[0055] In the embodiment, the third ball screw 55 is fixed on the bed 28 through the fifth support seat 54 and the sixth support seat 58, and the third ball screw 55 is connected to the output shaft of the third servo motor 51 through the third coupling 53.

[0056] In the embodiment, the induction coil 15 is a high-frequency induction copper tubular coil, and the induction coil 15 is provided with the current / cooling water input port 14 and the current / cooling water output port 16.

[0057] The pipe high-frequency induction cladding and rolling strengthening composite method of the embodiment comprises the following steps:

[0058] Step one, pipe clamping: insert the mandrel into the pipe 19 and pre-fabricate the manual cladding coating on the surface of the pipe 19, at the same time, rotate the first ball screw 29 by using the first servo motor 46, move the tail seat 36 by using the first ball screw nut threaded on the first ball screw 29, adjust the relative position of the sub-spindle center 22 and the spindle center 13 to be on the same axis position, and then clamp and fix the two ends of the pipe 19 on the threaded spindle center 13 and the sub-spindle center 22 respectively;

[0059] Step two, high frequency induction cladding: the front and back positions of the induction coil 15 are adjusted by the induction heating workbench 18 on the second sliding plate 40, so that the induction coil 15 is in the same axial position as the pipe 19; the high frequency induction cladding device is turned on, the induction coil 15 inputs and outputs current and cooling water in real time through the current / cooling water input port 14 and the current / cooling water output port 16, which plays a role of heating the pipe 19 and protecting the induction coil 15, and when the pipe 19 is preheated to the required temperature for induction cladding, the third servo motor 51 drives the third ball screw 55 to drive the second sliding plate 40 connected by the third screw nut, so that the second sliding plate 40 drives the induction coil 15 to move uniformly along the axial direction of the pipe 19, and the surface of the pipe 19 is continuously heated, until the cladding of the processing area is successful, the heating is stopped, and a good metallurgical bonding surface is formed.

[0060] Step three, warm rolling: stop the high frequency induction cladding, and after the surface of the pipe 19 naturally cools to the required temperature range for warm rolling, adjust the front and back position of the rolling workbench 21 on the first sliding plate 39, so that the rolling head 56 is in contact with the surface of the pipe 19, then fix the position of the rolling workbench 21, the electric cylinder 20 pushes the rolling head 56 to apply rolling force on the surface of the pipe 19, at the same time, the main shaft servo motor 2 drives the driving pulley 3, the driving pulley 3 drives the driven pulley 7 through the synchronous belt 5, and then drives the main shaft center 13 to rotate, and drives the pipe 19 to rotate; the second ball screw 34 is driven to rotate by the second servo motor 47, the second screw nut 60 connected with the second ball screw 34 drives the first sliding plate 39 to move, and the rolling workbench 21 on the first sliding plate 39 moves with the first sliding plate 39, so as to drive the rolling head 56 to warm roll the surface of the pipe 19. In order to process the processing area, the pipe 19 needs to be driven to rotate uniformly by the main shaft servo motor 2, and the rolling head 56 also moves along the axial direction under the drive of the second servo motor 47.

[0061] In addition, the rolling head 56 can be arranged in multiple directions and at multiple angles, not limited to the arrangement method in the figure; the rolling form is not limited to one, and the pipe 19 can be subjected to warm rolling after induction cladding, and the two processes can be combined, and multiple forms of rolling can be performed, such as ultrasonic rolling and vibration type rolling.

[0062] The above is only a preferred embodiment of the present application, and does not limit the present application, any simple modification, change and equivalent structure change made according to the technical essence of the present application to the above embodiment are still within the protection scope of the technical solution of the present application.

Claims

1. A high-frequency induction cladding and rolling strengthening composite device for pipes, characterized by: It comprises a bed base (1) and a bed (28) fixedly connected to the bed base (1), as well as a pipe clamping and rotating mechanism, a pipe warm rolling mechanism and a pipe induction cladding mechanism arranged on the bed base (1) and the bed (28); The pipe clamping and rotating mechanism comprises a main spindle top (13) for being arranged at one end of the pipe (19) and a main spindle top motion mechanism for driving the main spindle top (13) to move, and a sub-spindle top (22) for being arranged at the other end of the pipe (19) and a sub-spindle top motion mechanism for driving the sub-spindle top (22) to move; the main spindle top motion mechanism comprises a main spindle servo motor (2), a driving pulley (3) connected to the output shaft of the main spindle servo motor (2), and a driven pulley (7) connected to the driving pulley (3) through a synchronous belt (5), the main spindle top (13) is connected to the driven pulley (7); the sub-spindle top motion mechanism comprises a first servo motor (46), a first ball screw (29) connected to the output shaft of the first servo motor (46), and a tailstock (36) connected to the first ball screw (29) through a first screw nut, the tailstock (36) is equipped with a sub-spindle top (22) at the same axial position as the main spindle top (13), The pipe warm rolling mechanism comprises a second servo motor (47), a second ball screw (34) connected to the output shaft of the second servo motor (47), and a first slide (39) connected to the second ball screw (34) via a second screw nut (60); a rolling workbench (21) capable of moving forward and backward on the slide rail of the first slide (39) is installed on the first slide (39); an electric cylinder (20) is installed on the rolling workbench (21); the piston rod end of the electric cylinder (20) is connected to a rolling head bracket (59); the rolling head bracket (59) is connected to a rolling head (56) capable of moving forward and backward under the power of the electric cylinder (20) to apply different degrees of pressure to the surface of the pipe (19); The pipe induction cladding mechanism comprises a third servo motor (51), a third ball screw (55) connected to the output shaft of the third servo motor (51), and a second slide (40) connected to the third ball screw (55) via a third screw nut. The second slide (40) is provided with an induction heating workbench (18) capable of moving forward and backward on the slide rail of the second slide (40). The induction heating workbench (18) is provided with an induction coil (15) capable of heating the surface of the pipe (19) and the surface coating layer.

2. A high-frequency induction cladding and rolling strengthening composite device for pipes according to claim 1, characterized in that: The spindle servo motor (2) is fixedly connected to the bed base (1), and the driven pulley (7) and the spindle top (13) are assembled and connected using a bearing retaining ring (6) and a key (52).

3. The high-frequency induction cladding and rolling strengthening composite device for pipes according to claim 1, characterized in that: The spindle tip (13) is provided with a protective cover consisting of a first lower shell (10) and a first upper shell (9) connected to the top of the first lower shell (10); the first lower shell (10) is fixedly connected to the bed (28); the spindle tip (13) and the first lower shell (10) are assembled and connected using bearings and sleeves.

4. The high-frequency induction cladding and rolling strengthening composite device for pipes according to claim 1, characterized in that: The first ball screw (29) is fixed to the bed (28) through a first support seat (31) and a second support seat (41), and the first ball screw (29) is connected to the output shaft of the first servo motor (46) through a first coupling (44); a protective cover consisting of a second lower shell (26) and a second upper shell (24) connected to the top of the second lower shell (26) is provided on the sub-spindle top (22), the second lower shell (26) is fixedly connected to the tailstock (36), and the sub-spindle top (22) and the second lower shell (26) are assembled and connected using a bearing and a sleeve.

5. The high-frequency induction cladding and rolling strengthening composite device for pipes according to claim 1, characterized in that: The second ball screw (34) is fixed to the bed (28) through a third support seat (32) and a fourth support seat (42), and the second ball screw (34) is connected to the output shaft of the second servo motor (47) through a second coupling (45).

6. The high-frequency induction cladding and rolling strengthening composite device for pipes according to claim 1, characterized in that: The third ball screw (55) is fixed to the bed (28) through a fifth support seat (54) and a sixth support seat (58), and the third ball screw (55) is connected to the output shaft of the third servo motor (51) through a third coupling (53).

7. The high-frequency induction cladding and rolling strengthening composite device for pipes according to claim 1, characterized in that: The induction coil (15) is a high-frequency induction copper circular tubular coil, and is provided with a current / cooling water input port (14) and a current / cooling water output port (16).

8. A method for high-frequency induction cladding and rolling strengthening of pipes using the device according to claim 1, characterized in that: The method comprises the following steps: Step 1, clamping the pipe (19): inserting a core rod into the pipe (19) and prefabricating a manual cladding coating on the surface of the pipe (19), while using a first servo motor (46) to drive the first ball screw (29) to rotate, and a first screw nut threadedly connected to the first ball screw (29) drives the tailstock (36) to move, adjusting the relative position of the sub-spindle top (22) and the main spindle top (13) so that they are on the same axis position, and then placing the two ends of the pipe (19) on the main spindle top (13) and the sub-spindle top (22) with threads and clamping them; Step 2, high-frequency induction cladding: the front and rear positions of the induction coil (15) are adjusted by the induction heating workbench (18) on the second slide (40), so that the induction coil (15) and the pipe (19) are in the same axial position; the high-frequency induction cladding equipment is turned on, and the induction coil (15) inputs and outputs current and cooling water in real time through the current / cooling water input port (14) and the current / cooling water output port (16), which play the role of heating the pipe (19) and protecting the induction coil (15); when the pipe (19) is preheated to the temperature required for induction cladding, the third servo motor (51) drives the third ball screw (55) to drive the second slide (40) connected by the third screw nut, so that the second slide (40) drives the induction coil (15) to move at a uniform speed along the axial direction of the pipe (19), continuously moving and heating the surface of the pipe (19) to form a good metallurgical bonding surface; Step 3, warm rolling: stop high-frequency induction cladding, wait for the surface of the pipe (19) to cool naturally to the temperature range required for warm rolling, adjust the front and rear positions of the rolling table (21) on the first slide (39), make the rolling head (56) and the surface of the pipe (19) contact each other, fix the position of the rolling table (21), and the electric cylinder (20) pushes the rolling head (56) to apply rolling force on the surface of the pipe (19). At the same time, the main shaft servo motor (2) drives the driving pulley (3), and the driving pulley ( 3) The driven pulley (7) is driven by the synchronous belt (5), thereby rotating the main shaft top (13), and driving the pipe (19) to rotate; the second servo motor (47) drives the second ball screw (34) to rotate, and the second screw nut (60) threadedly connected to the second ball screw (34) drives the first slide (39) to move, and the rolling workbench (21) on the first slide (39) moves with the first slide (39), thereby driving the rolling head (56) to perform warm rolling on the surface of the pipe (19).

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