Dual-purpose equipment for hot wire TIG internal hole surfacing and CMT flange special automatic surfacing

Abstract

The present invention relates to welding equipment, specifically a dual-purpose automatic surfacing equipment for hot wire TIG internal hole surfacing and CMT flange special surfacing. The hot wire TIG welding system and the CMT welding system are respectively connected to a mobile precision cross operating arm, giving play to the convenience of the mobile precision cross operating arm moving left and right in space. The clamping and rotation of the workpiece are realized by borrowing a rotary power head box and a servo precision positioner. The lifting roller adjusts the height of the workpiece. The overall control coordination is realized through the main control PLC system, and the surfacing welding of the inner wall of a small-diameter nozzle and the surface of the flange tube sheet is achieved. The present invention gives full play to the advantages of the hot wire TIG internal hole surfacing in realizing the welding of the inner wall of a small-diameter nozzle by using an argon arc hot wire welding system and a special argon arc welding head for surfacing the inner wall of an ultra-small flange nozzle, and the advantages of the CMT welding system in having small welding deformation and high speed on the surface of the flange tube sheet. A mobile precision cross operating arm is shared, saving the manufacturing cost of the equipment and improving the work efficiency.

Description

Technical Field

[0001] The present invention relates to welding equipment, specifically a dual-purpose automatic surfacing equipment dedicated to hot wire TIG internal hole surfacing and CMT flange surfacing. Background Art

[0002] Surfacing is a common welding technology process. The surfacing methods for components of conventional pressure vessel equipment are mainly manual welding electrodes, argon arc welding, or manual CMT (Cold Metal Transfer technology) surfacing. Often, the welding quality is difficult to guarantee, the surfacing time is long, the welding efficiency is low, and the forming quality is not aesthetic. Moreover, surfacing with different processes requires their respective welding equipment, and the welding equipment for each process cannot be used interchangeably, resulting in waste of resources, high costs, and occupation of a lot of storage space. Summary of the Invention

[0003] In order to solve the above problems existing in the existing surfacing technology, the purpose of the present invention is to provide a dual-purpose automatic surfacing equipment dedicated to hot wire TIG internal hole surfacing and CMT flange surfacing.

[0004] The purpose of the present invention is achieved by the following technical solutions:

[0005] The present invention includes a rotary power head box, an argon arc welding hot wire welding system, a special argon arc welding head for surfacing the inner wall of an ultra-small flange nozzle, a mobile precision cross operating arm, a CMT welding system, a servo precision positioner, and a main control PLC system. The rotary power head box and the servo precision positioner are respectively arranged on the ground on the left and right sides of the mobile precision cross operating arm. The chuck on the rotary power head box clamps the workpiece to be subjected to hot wire TIG internal hole surfacing. The rotary power head box, the mobile precision cross operating arm, and the servo precision positioner are respectively connected to the main control PLC system, and the workpiece to be subjected to CMT welding is installed on the servo precision positioner. The mobile precision cross operating arm includes a column, a cross beam, a lifting power source, a transmission mechanism A, a motor seat, a transverse movement power source, and a transmission mechanism B. The lifting power source is installed on the column, and the output end is connected to the motor seat through the transmission mechanism A. The transverse movement power source is installed on the motor seat, and the output end of the transverse movement power source is connected to the cross beam slidably connected to the motor seat through the transmission mechanism B. The cross beam is perpendicular to the column and has the freedom to lift and horizontally move forward and backward with the motor seat. One end of the cross beam facing the rotary power head box is installed with a special argon arc welding head for surfacing the inner wall of an ultra-small flange nozzle, and the special argon arc welding head for surfacing the inner wall of an ultra-small flange nozzle is connected to the argon arc welding hot wire welding system. The other end of the cross beam facing the servo precision positioner is respectively installed with a welding torch B and a wire feeder, and the welding torch B and the wire feeder are respectively connected to the CMT welding system.

[0006] Wherein: A track is installed on the ground between the rotary power head box and the servo precision positioner, and an operating machine is slidably connected to the track; the operating machine includes an operating machine power source, a base, a driving pulley and a driven pulley. The operating machine power source is installed on the base. Pulleys for sliding and traveling on the track are installed on both sides of the base. One of the pulleys is connected to the output end of the operating machine power source and is the driving pulley, and the other pulley is the driven pulley; the column in the mobile precision cross operating arm is fixed to the base.

[0007] The sliding direction of the base on the track is the same as the transverse movement direction of the cross beam, and the track is parallel to the cross beam.

[0008] The transmission mechanism A is a chain and sprocket assembly, that is, sprockets are respectively rotatably installed at the upper and lower ends of the column, and the upper and lower sprockets are connected by a chain. One of the sprockets is connected to the output end of the lifting power source, and the motor base is fixedly connected to the chain; the lifting power source drives the motor base to lift through the chain and sprocket assembly, thereby realizing the lifting degree of freedom of the cross beam.

[0009] Guide rails A are provided on both sides in the height direction of the column, and rollers for rolling connection with the guide rails A are installed on both the left and right sides of the motor base.

[0010] The transmission mechanism B includes a gear and a rack. The output end of the transverse movement power source is connected with a gear, and the rack is installed on the cross beam and meshes with the gear for transmission; the transverse movement power source drives the cross beam to move horizontally back and forth relative to the motor base through the gear and the rack, thereby realizing the horizontal movement degree of freedom of the cross beam.

[0011] Guide rails B are installed on both the upper and lower sides of the cross beam on the motor base, and sliders for sliding connection with the guide rails B are connected to both the upper and lower sides of the cross beam.

[0012] The special argon arc welding head for surfacing the inner wall of the ultra-small flange nozzle includes an electric slide drive motor, an electric cross slide, a connecting rod and a welding torch A. The electric slide drive motor is installed at one end of the cross beam facing the rotary power head box. The output end of the electric slide drive motor is connected with an electric cross slide. A connecting rod is installed on the electric cross slide, and the welding torch A is fixed on the connecting rod; the electric slide drive motor and the welding torch A are respectively connected to the argon arc hot wire welding system.

[0013] An elevating supporting roller for preventing the workpiece from sagging is also installed on the rotary power head box.

[0014] The advantages and positive effects of the present invention are:

[0015] The present invention realizes two welding process methods through a set of equipment, respectively taking advantage of the surfacing on the flange and tube sheet surfaces by a CMT welding machine and the surfacing on the inner wall of a small-diameter flange nozzle by a hot-wire TIG welding machine. With the stability and convenient operation of a mobile precision cross operating arm, through the overall coordinated control of a servo precision turntable, a rotary power head box, a lifting roller, etc. by a main control PLC system, and by programming, the automatic surfacing of the nozzle flange and the tube sheet is completed, ensuring the welding quality and improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 is Figure 1 the front view of the structure of the mobile precision cross operating arm in

[0018] Figure 3 is Figure 1 the top view of the structure of the mobile precision cross operating arm in

[0019] Figure 4 is Figure 1 the left view of the structure of the mobile precision cross operating arm in

[0020] Figure 5 is Figure 1 the front view of the structure of the special argon arc welding head for surfacing on the inner wall of an ultra-small flange nozzle in

[0021] Figure 6 is Figure 1 the top view of the structure of the special argon arc welding head for surfacing on the inner wall of an ultra-small flange nozzle in

[0022] Wherein: 1 is a rotary power head box, 2 is a lifting roller, 3 is an argon arc welding hot wire welding system, 4 is a special argon arc welding head for surfacing on the inner wall of an ultra-small flange nozzle, 401 is an electric slide drive motor, 402 is an electric cross slide, 403 is a connecting rod, 404 is a welding torch A, 5 is a mobile precision cross operating arm, 501 is a column, 502 is a cross beam, 503 is a lifting power source, 504 is a chain and sprocket assembly, 505 is a motor base, 506 is a transverse movement power source, 507 is a gear, 508 is a rack, 509 is a guide rail A, 510 is a roller, 511 is a track, 512 is a base, 513 is a welding torch B, 514 is a wire feeder, 515 is a guide rail B, 516 is a slider, 517 is an operating machine power source, 6 is a CMT welding system, 7 is a servo precision turntable, 8 is a main control PLC system. DETAILED DESCRIPTION OF THE INVENTION

[0023] The present invention will be further described in detail below with reference to the accompanying drawings.

[0024] AsFigures 1 to 6 As shown in the figure, the present invention includes a rotary power headstock 1, a hot wire TIG welding system 3 for argon arc welding, a special argon arc welding head 4 for surfacing the inner wall of an ultra-small flange nozzle, a mobile precision cross operating arm 5, a CMT welding system 6, a servo precision positioner 7, and a main control PLC system 8. The rotary power headstock 1 and the servo precision positioner 7 are respectively arranged on the ground on the left and right sides of the mobile precision cross operating arm 5. The chuck on the rotary power headstock 1 clamps the workpiece to be subjected to hot wire TIG internal hole surfacing. The rotary power headstock 1, the mobile precision cross operating arm 5, and the servo precision positioner 7 are respectively connected to the main control PLC system 8. The workpiece to be subjected to CMT welding is installed on the servo precision positioner 7. Through the control of the main control PLC system, the clamping and positioning, flipping or rotation of the workpiece are realized, parametric programming is achieved, and automatic surfacing welding is realized. The main control PLC system 8 of the present invention is a prior art and will not be elaborated herein.

[0025] The rotary power headstock 1 of this embodiment is a prior art and is a driving system for workpiece rotation, including a headstock, a chuck, and a driving head connected to the main control PLC system 8. The driving head includes a stepping motor and a reduction gearbox. The headstock is formed by welding box-type structures. The workpiece is clamped by the chuck and rotates under the drive of the driving head. The reduction gearbox is a worm and worm gear reduction gearbox with a self-locking function. When the lead angle of the worm of the reduction gearbox is less than the equivalent friction angle between the meshing teeth, it has self-locking property and can achieve reverse self-locking, that is, only the worm can drive the worm gear, and the worm gear cannot drive the worm, ensuring that the workpiece stays at any position at any time. The rotation adopts variable frequency stepless speed regulation, and the adjusted speed range meets the requirements of various idler welding speeds; the stepping motor drive is servo stepless speed regulation with constant torque output and stable speed. Especially, the start or stop is fast at low speed, which is convenient for workpiece clamping; the chuck uses a three-jaw self-centering chuck, which is a commercially available product purchased from Changzhou Beidefu Machinery Technology Co., Ltd. An elevating idler 2 is also installed on the headstock of the rotary power headstock 1 of this embodiment to support the workpiece clamped by the chuck. By adjusting the height of the elevating idler 2, workpieces of different sizes can be adapted, solving the problem that if the workpiece is clamped on the chuck and protrudes too long, the workpiece will sag, affecting the surfacing quality; the elevating idler 2 of this embodiment is a commercially available product purchased from Liaoning Shuanghua Welding and Cutting Equipment Co., Ltd.

[0026] The mobile precision cross operating arm 5 of this embodiment includes a column 501, a cross beam 502, a lifting power source 503, a transmission mechanism A, a motor base 505, a transverse movement power source 506, a transmission mechanism B, a guide rail A 509, rollers 510, a guide rail B 515 and a slider 516. The lifting power source 503 is installed at the upper end of the column 501, and the output end of the lifting power source 503 is connected to the motor base 505 through the transmission mechanism A; the lifting power source 503 of this embodiment includes a lifting motor and a lifting speed reducer. The input end of the lifting speed reducer is connected to the output shaft of the lifting motor, and the output end is connected to the transmission mechanism A. The transmission mechanism A of this embodiment is a chain and sprocket assembly 504, that is, sprockets are respectively rotatably installed at the upper and lower ends of the column 501, and the upper and lower sprockets are connected by a chain. One of the sprockets is connected to the output end of the lifting speed reducer, and the motor base 505 is fixedly connected to the chain; the lifting motor and the lifting speed reducer drive the motor base 505 to lift through the chain and sprocket assembly 504, thereby realizing the lifting degree of freedom of the cross beam 502. The lifting speed reducer of this embodiment is a worm and worm gear speed reducer in the prior art. The lifting motor is decelerated by the worm and worm gear speed reducer, and then drives the up and down displacement through the chain and sprocket assembly 504. In this embodiment, guide rails A 509 are provided on both sides of the column 501 in the height direction, and rollers 510 that are in rolling connection with the guide rails A 509 are installed on both the left and right sides of the motor base 505. A transverse movement power source 506 is installed on the motor base 505, and the output end of the transverse movement power source 506 is connected to the cross beam 502 that is slidably connected to the motor base 505 through the transmission mechanism B. The cross beam 502 is vertically arranged with the column 501 and is in a "cross" shape, having the degrees of freedom of lifting with the motor base 505 and horizontally moving back and forth. The transverse movement power source 506 of this embodiment includes a transverse movement motor and a transverse movement speed reducer. The input end of the transverse movement speed reducer is connected to the output shaft of the transverse movement motor, and the output end is connected to the transmission mechanism B. The transmission mechanism B of this embodiment includes a gear 507 and a rack 508. The output end of the transverse movement speed reducer is connected with a gear 507, and the rack 508 is installed on the cross beam 502 and meshes with the gear 507 for transmission; the transverse movement motor and the transverse movement speed reducer drive the cross beam 2 to move horizontally back and forth relative to the motor base 505 through the gear 507 and the rack 508, thereby realizing the transverse movement degree of freedom of the cross beam 502. The transverse movement speed reducer of this embodiment is a bevel gear speed reducer in the prior art, and the transverse movement motor is a stepping motor in the prior art. Guide rails B 515 are installed on both the upper and lower sides of the cross beam 2 on the motor base 505 of this embodiment, and sliders 516 that are slidably connected to the guide rails B 515 are connected to both the upper and lower sides of the cross beam 502. The movement of the cross beam 502 is guided by the guide rails B 515, decelerated by the stepping motor through the bevel gear speed reducer, and then the front and back displacement of the cross beam is realized through the transmission of the gear 507 and the rack 508. The lifting power source 503, the transverse movement power source 506 and the manipulator power source 517 of this embodiment are respectively connected to the main control PLC system 8.

[0027] In this embodiment, a track 511 is installed on the ground between the rotary power head box 1 and the servo precision positioner 7, and an operating machine is slidably connected to the track 511. The operating machine in this embodiment includes an operating machine power source 517, a base 512, a driving pulley and a driven pulley. The operating machine power source 517 is installed on the base 512 and can be a driving motor. Pulleys that slide and travel on the track 511 are installed on both sides of the base 512. The pulley on one side is connected to the output end of the operating machine power source 517 and is the driving pulley, and the pulley on the other side is the driven pulley. The lower end of the column 501 in the mobile precision cross operating arm 5 is fixed to the base 512 and slides along the track 511 under the drive of the operating machine power source 517. The mobile precision cross operating arm 5 can travel along the track 511, greatly expanding the scope of use of the equipment. The sliding direction of the base 512 on the track 511 is the same as the transverse movement direction of the cross beam 502, and the track 511 is parallel to the cross beam 502.

[0028] At one end of the cross beam 502 of this embodiment facing the rotary power head box 1, a special argon arc welding torch head 4 for surfacing the inner wall of the ultra-small flange nozzle is installed. At the other end of the cross beam 502 facing the servo precision positioner 7, a welding torch B513 and a wire feeder 514 are respectively installed. The welding torch B513 and the wire feeder 514 move together with the cross beam 502, ensuring the stability of wire feeding. The welding torch B513 and the wire feeder 514 are respectively connected to the CMT welding system 6 to achieve the welding function. The special argon arc welding torch head 4 for surfacing the inner wall of the ultra-small flange nozzle in this embodiment includes an electric slide drive motor 401, an electric cross slide 402, a connecting rod 403 and a welding torch A404. The electric slide drive motor 401 is installed at one end of the cross beam 502 facing the rotary power head box 1. The output end of the electric slide drive motor 401 is connected to the electric cross slide 402. The connecting rod 403 is installed on the electric cross slide 402, and the welding torch A404 is fixed to the connecting rod 403. The electric slide drive motor 401 and the welding torch A404 are respectively connected to the argon arc welding hot wire welding system 3 to achieve the welding function. The special argon arc welding torch head 4 for surfacing the inner wall of the ultra-small flange nozzle can achieve fine adjustment up and down and left and right through the electric cross slide 402. The fine adjustment stroke is 100×100mm. It can be conveniently controlled through the hand control box to correct and adjust the possible welding deviation during the welding process, and the surfacing of the inner wall of an 80mm cylinder can be achieved.

[0029] The electric cross slide 402 in this embodiment is a commercially available product purchased from Guangzhou Weierde Automatic Welding Equipment Co., Ltd.; the argon arc welding hot wire welding system 3 in this embodiment is a commercially available product purchased from Shandong Aotai Electric Co., Ltd.; the CMT welding system 6 in this embodiment is a commercially available product purchased from Zhuhai Fronius Welding Technology Co., Ltd.; the servo precision positioner 7 in this embodiment is a commercially available product purchased from Wuxi Fengwei Machinery Equipment Co., Ltd.

[0030] The working principle of the present invention is as follows:

[0031] The present invention utilizes a hot wire TIG welding system 3 and a CMT welding system 6 to provide welding functions. The function of moving the welding torch up and down and left and right is realized by connecting a mobile precision cross manipulator 5 with a special argon arc welding torch head 4 for surfacing on the inner wall of an ultra-small flange nozzle. The rotation power headstock 1, the lifting roller 2, and the servo precision positioner 7 are used to clamp and position the workpiece and flip and rotate it. The rotation power headstock 1, the lifting roller 2, the servo precision positioner 7, and the mobile precision cross manipulator 5 are coordinated by a main control PLC system 8 to realize surfacing welding on the surface and inner wall of the product. The main control PLC system 8 realizes parametric programming by controlling the coordination of the mobile precision cross manipulator 5 with the rotation power headstock 1 and the servo precision positioner 7. During the operation process, the matching parameters are set, the number of surfacing passes and the surfacing diameter are input, and only the starting point of surfacing needs to be determined. The intelligent system will then realize automatic welding and complete the surfacing. Specifically:

[0032] Hot wire TIG internal hole surfacing: The argon arc welding hot wire welding system 3 is used to realize one-key control of the special argon arc welding torch head 4 for surfacing on the inner wall of the ultra-small flange nozzle, the wire feeder 514, and the hot wire power supply. By perfectly combining the installation of the special argon arc welding torch head 4 for surfacing on the inner wall of the ultra-small flange nozzle with the mobile precision cross manipulator 5, the up and down and left and right movement of the welding torch A404 is controlled. With the cooperation of the rotation power headstock 1 and the lifting roller 2, the workpiece is clamped, fixed, and rotated. The lifting roller 2 adjusts the height of the workpiece. Finally, the overall coordination control is completed through the program compilation of the main control PLC system 8 to complete the inner wall surfacing work of the nozzle flange (the minimum diameter can reach 80 mm).

[0033] CMT special automatic surfacing for flange: Taking advantage of the CMT welding system 6 in surfacing, with the help of the stability of the mobile precision cross manipulator 5 and the convenience of up and down and left and right movement, the main control PLC system 8 coordinates the overall system. With the flipping and rotation of the servo precision positioner 7, through the signal transmission of the main control PLC system 8, the mobile precision cross manipulator 5 and the servo precision positioner 7 act in coordination to clamp the welding torch B513 of the CMT welding power supply to realize surfacing welding at different positions on the surface and inner wall of the workpiece.

[0034] The present invention shares a mobile precision cross manipulator, which saves the manufacturing cost of the equipment. The use of the present invention not only increases the welding process application of surfacing parts, expands the variety and processing size range of products, but also ensures the surfacing quality and improves the work efficiency.

Claims

1. A dual-purpose automatic surfacing equipment for hot wire TIG internal hole surfacing and CMT flange special surfacing, Characterized in that: It includes a rotary power head box (1), an argon arc welding hot wire welding system (3), a special argon arc welding head (4) for surfacing the inner wall of an ultra-small flange nozzle, a mobile precision cross operating arm (5), a CMT welding system (6), a servo precision positioner (7) and a main control PLC system (8). Among them, the rotary power head box (1) and the servo precision positioner (7) are respectively arranged on the ground on the left and right sides of the mobile precision cross operating arm (5). The chuck on the rotary power head box (1) holds the workpiece to be subjected to hot wire TIG internal hole surfacing. The rotary power head box (1), the mobile precision cross operating arm (5) and the servo precision positioner (7) are respectively connected to the main control PLC system (8). The workpiece to be subjected to CMT welding is installed on the servo precision positioner (7); The mobile precision cross operating arm (5) includes a column (501), a cross beam (502), a lifting power source (503), a transmission mechanism A, a motor base (505), a transverse movement power source (506) and a transmission mechanism B. The lifting power source (503) is installed on the column (501), and the output end is connected to the motor base (505) through the transmission mechanism A. The transverse movement power source (506) is installed on the motor base (505). The output end of the transverse movement power source (506) is connected to the cross beam (502) slidably connected to the motor base (505) through the transmission mechanism B. The cross beam (502) is perpendicular to the column (501) and has the freedom to lift and horizontally move back and forth with the motor base (505); One end of the cross beam (502) facing the rotary power head box (1) is installed with a special argon arc welding head (4) for surfacing the inner wall of an ultra-small flange nozzle. The special argon arc welding head (4) for surfacing the inner wall of an ultra-small flange nozzle is connected to the argon arc welding hot wire welding system (3). The other end of the cross beam (502) facing the servo precision positioner (7) is respectively installed with a welding torch B (513) and a wire feeder (514). The welding torch B (513) and the wire feeder (514) are respectively connected to the CMT welding system (6).

2. The dual-purpose automatic surfacing equipment for hot wire TIG internal hole surfacing and CMT flange special surfacing according to claim 1, Characterized in that: A track (511) is installed on the ground between the rotary power head box (1) and the servo precision positioner (7). An operating machine is slidably connected to the track (511); The operating machine includes an operating machine power source (517), a base (512), a driving pulley and a driven pulley. The operating machine power source (517) is installed on the base (512). Pulleys for sliding and walking on the track (511) are installed on both sides of the base (512). One of the pulleys is connected to the output end of the operating machine power source (517) and is the driving pulley, and the other pulley is the driven pulley; The column (501) in the mobile precision cross operating arm (5) is fixed on the base (512).

3. The dual-purpose automatic surfacing equipment for hot wire TIG internal hole surfacing and CMT flange surfacing according to claim 2, characterized in that: the sliding direction of the base (512) on the track (511) is the same as the transverse movement direction of the cross beam (502), and the track (511) is parallel to the cross beam (502).

4. The dual-purpose automatic surfacing equipment for hot wire TIG internal hole surfacing and CMT flange surfacing according to claim 1, characterized in that: the transmission mechanism A is a chain and sprocket assembly (504), that is, sprockets are respectively rotatably installed at the upper and lower ends of the column (501), and the upper and lower sprockets are connected by a chain, and one of the sprockets is connected to the output end of the lifting power source (503), and the motor base (505) is fixedly connected to the chain; the lifting power source (503) drives the motor base (505) to lift through the chain and sprocket assembly (504), so as to realize the lifting freedom degree of the cross beam (502).

5. The dual-purpose automatic surfacing equipment for hot wire TIG internal hole surfacing and CMT flange surfacing according to claim 1, characterized in that: guide rails A (509) are arranged on both sides of the column (501) in the height direction, and rollers (510) rolling-connected to the guide rails A (509) are installed on both the left and right sides of the motor base (505).

6. The dual-purpose automatic surfacing equipment for hot wire TIG internal hole surfacing and CMT flange surfacing according to claim 1, characterized in that: the transmission mechanism B includes a gear (507) and a rack (508), the output end of the transverse movement power source (506) is connected with a gear (507), the rack (508) is installed on the cross beam (502) and meshes with the gear (507) for transmission; the transverse movement power source (506) drives the cross beam (2) to move horizontally back and forth relative to the motor base (505) through the gear (507) and the rack (508), so as to realize the horizontal movement freedom degree of the cross beam (502).

7. The dual-purpose automatic surfacing equipment for hot wire TIG internal hole surfacing and CMT flange surfacing according to claim 1, characterized in that: guide rails B (515) are installed on both the upper and lower sides of the cross beam (2) on the motor base (505), and sliding blocks (516) sliding-connected to the guide rails B (515) are connected to both the upper and lower sides of the cross beam (502).

8. The dual-purpose automatic surfacing equipment for hot wire TIG internal hole surfacing and CMT flange surfacing according to claim 1, characterized in that: The special argon arc welding head (4) for surfacing the inner wall of the ultra-small flange nozzle includes an electric slide drive motor (401), an electric cross slide (402), a connecting rod (403) and a welding torch A (404). The electric slide drive motor (401) is installed at one end of the cross beam (502) facing the rotary power head box (1). The output end of the electric slide drive motor (401) is connected with the electric cross slide (402). The connecting rod (403) is installed on the electric cross slide (402), and the welding torch A (404) is fixed on the connecting rod (403). The electric slide drive motor (401) and the welding torch A (404) are respectively connected with the argon arc hot wire welding system (3).

9. The dual-purpose automatic surfacing equipment for hot wire TIG internal hole surfacing and CMT flange special surfacing according to claim 1, characterized in that: An elevating roller (2) for preventing the workpiece from sagging is further installed on the rotary power head box (1).

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