Welding apparatus suitable for overlay welding of various forgings

CN224615480UActive Publication Date: 2026-08-11SHANXI JINBO FORGING CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-09-02
Publication Date
2026-08-11

AI Technical Summary

Technical Problem

[0004]现有的适用于多种锻件堆焊的焊接装置,具有无法对多种锻件进行加工,降低加工的效率,对锻件夹持不牢固,在堆焊的时候,对锻件造成损坏,影响加工使用

Benefits of technology

1、本适用于多种锻件堆焊的焊接装置,具有以下好处:设置有锻件加持单元,通过固定横板用于固定移动滑块,移动滑块移动,来进行调节位置,来对不同的锻件进行夹持使用,电动推杆一启动,来让移动滑块移动,来进行调节位置,安装板一和安装板二配合,来对锻件夹持板进行固定,锻件夹持板用于固定固定螺杆,固定螺杆转动,来进行调节夹持爪位置,夹持爪用于对锻件进行夹持,由此进行固定锻件使用,防护壳用于进行保护,动力电机一启动,来让其中一个链轮转动,两个链轮通过一个链条传动,来让另一个链轮转动,由此来让锻件夹持板转动,来进行固定夹持锻件,来进行使用;

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Abstract

This utility model discloses a welding device suitable for overlay welding of various forgings, relating to the design field of welding devices for various forgings. It includes a fixed base, a forging holding unit, and an overlay welding unit. The fixed base has four fixing bolts at its upper corners. A supporting vertical rod is mounted on the fixed base. An overlay welding unit is located on the front side of the supporting vertical rod. The forging holding unit includes a fixed horizontal plate, a movable slider, an electric push rod, a mounting plate, and a mounting plate. A fixed horizontal plate is fixedly connected to the front side of the supporting vertical rod, located below the overlay welding unit. A sliding groove is provided on the fixed horizontal plate on the right side of the supporting vertical rod. This allows for the processing of various forgings, improving processing efficiency, providing a more secure clamping of the forgings, preventing damage to the forgings during overlay welding, and ensuring that processing and use are not affected.
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Description

Technical Field

[0001] This utility model relates to the design of various forging welding devices, and in particular to a welding device suitable for overlay welding of various forgings. Background Technology

[0002] As an economical and rapid process for material surface modification, welding is increasingly widely used in the manufacturing and repair of parts in various industrial sectors. To maximize the effectiveness of the weld overlay, it is desirable to employ a welding method with minimal base material dilution, high deposition rate, and excellent weld overlay performance—that is, a high-quality, high-efficiency, and low-dilution welding technology.

[0003] Cold welding surfacing technology utilizes the principle of high-frequency electric spark discharge to perform heatless welding on workpieces, repairing surface defects and wear while ensuring the integrity of the workpiece. It can also be used to strengthen the workpiece, improving its wear resistance, heat resistance, and corrosion resistance. Cold welding surfacing equipment repairs metal workpieces without deformation or annealing, resulting in high weld strength and wear resistance. Metallographic, tensile, and hardness tests can be performed. The metallurgical bond between the welding material and the base material ensures the weld's strength. To facilitate processing, a welding device suitable for surfacing various forgings is needed.

[0004] Existing welding equipment suitable for surfacing various forgings has limitations: it cannot process multiple forgings, reducing processing efficiency; it does not clamp the forgings securely, causing damage to the forgings during surfacing and affecting processing and use. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide a welding device suitable for overlay welding of various forgings. It can process various forgings, improve processing efficiency, clamp the forgings more firmly, prevent damage to the forgings during overlay welding, and not affect processing and use. It can effectively solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a welding device suitable for overlay welding of various forgings, comprising a fixed base, a forging holding unit, and an overlay welding unit, characterized in that: Fixed base: Fixed bolts are provided at the four corners of the upper part. A support vertical rod is provided on the fixed base. A welding unit is provided on the front side of the support vertical rod. Forging holding unit: includes a fixed horizontal plate, a movable slider, an electric push rod 1, a mounting plate 1, and a mounting plate 2. A fixed horizontal plate is fixedly connected to the front side of the supporting vertical rod at the position below the welding unit. A sliding groove 1 is opened on the fixed horizontal plate at the position to the right of the supporting vertical rod. The sliding groove 1 runs through the front and rear sides of the fixed horizontal plate. A movable slider is slidably connected in the sliding groove 1. A push block is provided at the rear side of the movable slider. The rear side of the fixed horizontal plate at the position to the right of the sliding groove 1 is fixedly connected to the electric push rod 1 through a support seat. The extension end of the electric push rod 1 is fixedly connected to the corresponding push block. A mounting plate 1 is provided at the front side of the movable slider. A mounting plate 2 is provided at the front side of the fixed horizontal plate at the position to the left of the supporting vertical rod. The input end of the electric push rod 1 is electrically connected to the output end of an external power supply through an external control switch group.

[0007] The fixed base is used for fixed support, the support vertical rod is used for fixed support, the welding unit is used for welding, the fixed horizontal plate is used to fix the moving slider, the moving slider moves to adjust the position, and is used to clamp different forgings. The electric push rod is started to move the moving slider to adjust the position. Mounting plate one and mounting plate two cooperate to fix the forging clamping plate, and are used to fix and clamp the forgings.

[0008] Furthermore, the forging clamping unit also includes a forging clamping plate, a fixing screw, and clamping claws. Each of the mounting plate one and mounting plate two has a circular hole, and the two circular holes are rotatably connected to the forging clamping plate through bearings. Each of the two forging clamping plates has three annular arrayed sliding grooves two on one side, and a fixing screw is rotatably connected in each sliding groove two. One end of each fixing screw extends to the outside of the corresponding forging clamping plate and is connected to the handrail. A clamping claw is slidably connected in each sliding groove two, and the screw hole on each clamping claw is rotatably connected to the corresponding fixing screw.

[0009] The forging clamping plate is used to fix the fixing screw. The fixing screw rotates to adjust the position of the clamping claws, which are used to clamp the forging, thereby fixing the forging for processing and facilitating welding.

[0010] Furthermore, the forging clamping unit also includes a protective shell, sprockets, a chain, and a first power motor. A protective shell is provided on the front side of the fixed horizontal plate, located on the left side of the second mounting plate. The protective shell is fixedly connected to the first power motor through a support plate. The output shaft of the first power motor is fixedly connected to the power cylinder. The left end of the forging clamping plate on the second mounting plate extends into the protective shell. A sprocket is fixedly sleeved on the forging clamping plate and the power cylinder, respectively. The two sprockets are connected by a chain drive. The input end of the first power motor is electrically connected to the output end of an external power supply through an external control switch group.

[0011] The protective shell is used for protection. When the power motor is started, it rotates one of the sprockets. The two sprockets are driven by a chain to rotate the other sprocket, which in turn rotates the forging clamping plate to facilitate adjustment of the forging position for welding in different locations.

[0012] Furthermore, the welding unit includes a rectangular top plate, a rectangular slider, and a second electric push rod. A rectangular top plate is fixedly connected to the front side of the supporting vertical rod at the upper side of the fixed horizontal plate. A third sliding groove is provided on the rectangular top plate, which runs through the upper and lower sides of the rectangular top plate. A rectangular slider is slidably connected in the third sliding groove. A first push block is provided on the upper side of the rectangular slider. The second electric push rod is fixedly connected to the left side of the third sliding groove on the rectangular top plate through a support frame. The extension end of the second electric push rod is fixedly connected to the corresponding first push block. The input end of the second electric push rod is electrically connected to the output end of an external power supply through an external control switch group.

[0013] The rectangular top plate is used to fix the second electric push rod. When the second electric push rod is activated, the rectangular slider moves. The movement of the rectangular slider is used to adjust the position, which is convenient for welding at different positions and for processing.

[0014] Furthermore, the welding unit also includes an electric push rod three, a fixed frame, a welding torch head, and a welding rod guide pipe. An electric push rod three is provided on the lower side of the rectangular slider. A fixed frame is provided on the extended end of the electric push rod three. A circular hole two is opened on the fixed frame. A welding rod guide pipe is provided in the circular hole two. The fixed frame is fixedly connected to the welding torch head through a support frame. The welding torch head corresponds to the welding rod guide pipe. The input end of the electric push rod three is electrically connected to the output end of an external power supply through an external control switch group.

[0015] The electric push rod is activated to move the fixed frame, the welding torch is activated to perform welding processing, and the welding rod guide pipe is used to guide the movement of the welding rod for processing.

[0016] Furthermore, the welding unit also includes conveyor rollers, gears, and a second power motor. A mounting plate is respectively installed on the fixing frame at the front and rear sides of the welding rod guide pipe. Two conveyor rollers are rotatably connected between the two mounting plates, and the two conveyor rollers correspond to the welding rod guide pipe. A second power motor is fixedly connected to the fixing frame at the front side 1 of the mounting plate. The output shaft of the second power motor is fixedly connected to one of the conveyor rollers. A gear is fixedly fitted onto each of the two conveyor rollers at the rear side of the mounting plate, and the two gears mesh with each other. The input end of the second power motor is electrically connected to the output end of an external power supply through an external control switch group.

[0017] The second motor starts, causing one of the conveyor rollers to rotate. The two gears mesh, causing both conveyor rollers to rotate, thereby moving the welding rod to facilitate feeding and welding.

[0018] Compared with the prior art, the beneficial effects of this utility model are: 1. This welding device, applicable to the surfacing of various forgings, has the following advantages: It is equipped with a forging holding unit. A fixed horizontal plate is used to fix a movable slider. The movable slider moves to adjust its position for clamping different forgings. An electric push rod is activated to move the movable slider for position adjustment. Mounting plates one and two cooperate to fix the forging clamping plate. The forging clamping plate is used to fix a fixing screw. The rotation of the fixing screw adjusts the position of the clamping claws, which are used to clamp the forgings, thus securing them for use. A protective shell is used for protection. When the power motor is activated, one sprocket rotates. The two sprockets are driven by a chain to rotate the other sprocket, thereby rotating the forging clamping plate to fix and clamp the forgings for use. 2. This welding device, applicable to the surfacing of various forgings, has the following advantages: It is equipped with a surfacing unit, through which a rectangular top plate is used to fix an electric push rod two. When the electric push rod two is activated, it moves a rectangular slider. The movement of the rectangular slider is used to adjust the position, facilitating surfacing at different positions. When the electric push rod three is activated, it moves the fixing frame. When the surfacing torch is activated, it performs the surfacing process. The welding rod guide pipe is used to guide the movement of the welding rod. When the power motor two is activated, it rotates one of the conveyor rollers. Two gears mesh to rotate the two conveyor rollers for surfacing. 3. This welding device, applicable to the surfacing of various forgings, has the following advantages: it can process various forgings, improves processing efficiency, clamps the forgings more firmly, prevents damage to the forgings during surfacing, and does not affect processing and use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the front structure of the present invention; Figure 2 This is a schematic diagram of the rear structure of the present invention; Figure 3 This is a partial cross-sectional view of the forging support unit of the present invention; Figure 4 This is a schematic diagram of the forging clamping plate structure of the present invention; Figure 5 This is a partial structural diagram of the welding unit of the present invention.

[0020] Explanation of reference numerals in the attached figures: 1. Fixed base, 2. Supporting vertical rod, 3. Forging clamping unit, 31. Fixed horizontal plate, 32. Moving slider, 33. Electric push rod I, 34. Mounting plate I, 35. Mounting plate II, 36. Forging clamping plate, 37. Fixed screw, 38. Clamping claw, 39. Protective shell, 310. Sprocket, 311. Chain, 312. Power motor I, 4. Welding unit, 41. Rectangular top plate, 42. Rectangular slider, 43. Electric push rod II, 44. Electric push rod III, 45. Fixed frame, 46. Welding gun head, 47. Welding electrode guide pipe, 48. Conveying roller, 49. Gear, 410. Power motor II. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-5 This embodiment provides a technical solution: a welding device suitable for overlay welding of various forgings, including a fixed base 1, a forging holding unit 3, and an overlay welding unit 4, characterized in that: Fixed base 1: Fixed bolts are provided at the four corners of the fixed base 1. A support vertical rod 2 is provided on the fixed base 1. A welding unit 4 is provided on the front side of the support vertical rod 2. Forging holding unit 3 includes a fixed horizontal plate 31, a movable slider 32, an electric push rod 33, a mounting plate 34, and a mounting plate 35. A fixed horizontal plate 31 is fixedly connected to the front side of the support vertical rod 2 at the position below the welding unit 4. A sliding groove 1 is opened on the fixed horizontal plate 31 at the position to the right of the support vertical rod 2. The sliding groove 1 runs through the front and rear sides of the fixed horizontal plate 31. A movable slider 32 is slidably connected in the sliding groove 1. A push block is provided at the rear side of the movable slider 32. The rear side of the fixed horizontal plate 31 at the position to the right of the sliding groove 1 is fixedly connected to the electric push rod 33 through a support seat. The extension end of the electric push rod 33 is fixedly connected to the corresponding push block. A mounting plate 34 is provided at the front side of the movable slider 32. A mounting plate 35 is provided at the front side of the fixed horizontal plate 31 at the position to the left of the support vertical rod 2. The input end of the electric push rod 33 is electrically connected to the output end of an external power supply through an external control switch group.

[0023] The fixed base 1 is used for fixed support, the support vertical rod 2 is used for fixed support, the welding unit 4 is used for welding, the fixed horizontal plate 31 is used to fix the movable slider 32, the movable slider 32 moves to adjust its position, and is used to clamp different forgings. The electric push rod 1 33 is activated to move the movable slider 32 to adjust its position. The mounting plate 1 34 and the mounting plate 2 35 cooperate to fix the forging clamping plate 36, and to fix and clamp the forging.

[0024] The forging clamping unit 3 also includes a forging clamping plate 36, a fixing screw 37, and a clamping claw 38. A circular hole is opened on the mounting plate 1 34 and the mounting plate 2 35 respectively. The two circular holes are rotatably connected to the forging clamping plate 36 through bearings. Three annular array slide grooves 2 are opened on the corresponding side of the two forging clamping plates 36 respectively. A fixing screw 37 is rotatably connected in each slide groove 2. One end of each fixing screw 37 extends to the outside of the corresponding forging clamping plate 36 and is connected to the handrail. A clamping claw 38 is slidably connected in each slide groove 2. The screw hole on each clamping claw 38 is rotatably connected to the corresponding fixing screw 37.

[0025] The forging clamping plate 36 is used to fix the fixing screw 37. The fixing screw 37 rotates to adjust the position of the clamping claw 38. The clamping claw 38 is used to clamp the forging, thereby fixing the forging for processing and facilitating welding.

[0026] The forging clamping unit 3 also includes a protective shell 39, a sprocket 310, a chain 311, and a power motor 312. A protective shell 39 is located on the left side of the mounting plate 35 on the front side of the fixed horizontal plate 31. The protective shell 39 is fixedly connected to the power motor 312 through a support plate. The output shaft of the power motor 312 is fixedly connected to the power cylinder. The left end of the forging clamping plate 36 on the mounting plate 35 extends into the protective shell 39. A sprocket 310 is fixedly sleeved on the forging clamping plate 36 and the power cylinder, respectively. The two sprockets 310 are connected by a chain 311. The input end of the power motor 312 is electrically connected to the output end of an external power supply through an external control switch group.

[0027] The protective shell 39 is used for protection. The power motor 312 is started to rotate one of the sprockets 310. The two sprockets 310 are driven by a chain 311 to rotate the other sprocket 310, thereby rotating the forging clamping plate 36 to facilitate adjustment of the forging position for welding in different positions.

[0028] The welding unit 4 includes a rectangular top plate 41, a rectangular slider 42, and an electric push rod 43. A rectangular top plate 41 is fixedly connected to the front of the support rod 2 at a position above the fixed horizontal plate 31. A sliding groove 3 is provided on the rectangular top plate 41, which runs through the upper and lower sides of the rectangular top plate 41. A rectangular slider 42 is slidably connected in the sliding groove 3. A push block 1 is provided on the upper side of the rectangular slider 42. The rectangular top plate 41 is fixedly connected to the electric push rod 43 at a position on the left side of the sliding groove 3 through a support frame. The extension end of the electric push rod 43 is fixedly connected to the corresponding push block 1. The input end of the electric push rod 43 is electrically connected to the output end of an external power supply through an external control switch group.

[0029] The rectangular top plate 41 is used to fix the electric push rod 43. When the electric push rod 43 is activated, the rectangular slider 42 is moved. The rectangular slider 42 is moved to adjust the position, which is convenient for welding at different positions and for processing.

[0030] The welding unit 4 also includes an electric push rod 44, a fixed frame 45, a welding torch head 46, and a welding rod guide pipe 47. An electric push rod 44 is provided on the lower side of the rectangular slider 42. A fixed frame 45 is provided on the extended end of the electric push rod 44. A circular hole 2 is opened on the fixed frame 45, and a welding rod guide pipe 47 is provided in the circular hole 2. The fixed frame 45 is fixedly connected to the welding torch head 46 through a support frame. The welding torch head 46 corresponds to the welding rod guide pipe 47. The input end of the electric push rod 44 is electrically connected to the output end of an external power supply through an external control switch group.

[0031] The electric push rod 44 is activated to move the fixed frame 45, the welding torch head 46 is activated to perform welding processing, and the welding rod guide pipe 47 is used to guide the movement of the welding rod for processing.

[0032] The welding unit 4 also includes conveyor rollers 48, gears 49, and a second power motor 410. A mounting plate is provided on the fixing frame 45 at the front and rear sides of the welding rod guide pipe 47, and two conveyor rollers 48 are rotatably connected between the two mounting plates. The two conveyor rollers 48 correspond to the welding rod guide pipe 47. A second power motor 410 is fixedly connected to the fixing frame 45 at the front side 1 of the mounting plate. The output shaft of the second power motor 410 is fixedly connected to one of the conveyor rollers 48. A gear 49 is fixedly sleeved on the two conveyor rollers 48 at the rear side of the mounting plate. The two gears 49 are meshed with each other. The input end of the second power motor 410 is electrically connected to the output end of an external power supply through an external control switch group.

[0033] The second motor 410 starts, causing one of the conveyor rollers 48 to rotate. The two gears 49 mesh, causing the two conveyor rollers 48 to rotate, thereby moving the welding rod to facilitate feeding and welding.

[0034] The working principle of the welding device for overlay welding of various forgings provided by this utility model is as follows: First, a fixed horizontal plate 31 is used to fix a movable slider 32. The movable slider 32 moves to adjust its position for clamping different forgings. An electric push rod 33 is activated to move the movable slider 32 to adjust its position. Mounting plates 34 and 35 cooperate to fix the forging clamping plate 36. The forging clamping plate 36 is used to fix a fixing screw 37. The fixing screw 37 rotates to adjust the position of the clamping claw 38. The clamping claw 38 is used to clamp the forging, thereby fixing the forging. A protective shell 39 is used for protection. A power motor 312 is activated to rotate one of the sprockets 310. One sprocket 310 is driven by a chain 311 to rotate another sprocket 310, thereby rotating the forging clamping plate 36 to fix and clamp the forging. After clamping, the rectangular top plate 41 is used to fix the electric push rod 43. The electric push rod 43 is activated to move the rectangular slider 42. The rectangular slider 42 moves to adjust the position for welding at different positions. The electric push rod 44 is activated to move the fixing frame 45. The welding gun head 46 is activated to perform welding processing. The welding rod guide pipe 47 is used to guide the movement of the welding rod. The power motor 410 is activated to rotate one of the conveyor rollers 48. Two gears 49 mesh to rotate the two conveyor rollers 48 for welding.

[0035] It is worth noting that the core chip of the external control switch group disclosed in the above embodiments is a PLC microcontroller, the second power motor 410 and the first power motor 312 are servo motors, and the external control switch group controls the operation of the first electric push rod 33, the second electric push rod 43, the third electric push rod 44, the second power motor 410 and the first power motor 312 using methods commonly used in the prior art.

[0036] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A welding device suitable for overlay welding of various forgings, comprising a fixed base (1), a forging holding unit (3), and an overlay welding unit (4), characterized in that: Fixed base (1): Fixed bolts are provided at the four corners of the base. A support rod (2) is provided on the fixed base (1). A welding unit (4) is provided on the front side of the support rod (2). Forging support unit (3): includes a fixed horizontal plate (31), a movable slider (32), an electric push rod (33), a mounting plate (34), and a mounting plate (35). A fixed horizontal plate (31) is fixedly connected to the front side of the support vertical rod (2) at the position below the welding unit (4). A sliding groove is provided on the fixed horizontal plate (31) at the position to the right of the support vertical rod (2). The sliding groove passes through the front and rear sides of the fixed horizontal plate (31). A movable slider (32) is slidably connected in the sliding groove. A push block is provided on the rear side of the fixed horizontal plate (31). The rear side of the fixed horizontal plate (31) is located on the right side of the slide groove and is fixedly connected to the electric push rod (33) via a support seat. The extension end of the electric push rod (33) is fixedly connected to the corresponding push block. A mounting plate (34) is provided on the front side of the movable slider (32). A mounting plate (35) is provided on the front side of the fixed horizontal plate (31) on the left side of the support vertical rod (2). The input end of the electric push rod (33) is electrically connected to the output end of the external power supply via an external control switch group.

2. The welding apparatus for overlay welding of various forgings according to claim 1, characterized in that: The forging clamping unit (3) also includes a forging clamping plate (36), a fixing screw (37), and a clamping claw (38). A circular hole is opened on the mounting plate one (34) and the mounting plate two (35). The two circular holes are rotatably connected to the forging clamping plate (36) through bearings. Three annular array slide grooves are opened on the corresponding side of the two forging clamping plates (36). A fixing screw (37) is rotatably connected in each slide groove. One end of each fixing screw (37) extends to the outside of the corresponding forging clamping plate (36) and is connected to the handrail. A clamping claw (38) is slidably connected in each slide groove. The screw hole on each clamping claw (38) is rotatably connected to the corresponding fixing screw (37).

3. The welding apparatus for overlay welding of various forgings according to claim 2, characterized in that: The forging holding unit (3) also includes a protective shell (39), a sprocket (310), a chain (311) and a power motor (312). A protective shell (39) is provided on the front side of the fixed horizontal plate (31) at the left side of the mounting plate (35). The protective shell (39) is fixedly connected to the power motor (312) through a support plate. The output shaft of the power motor (312) is fixedly connected to the power cylinder. The left end of the forging clamping plate (36) on the mounting plate (35) extends into the protective shell (39). A sprocket (310) is fixedly sleeved on the forging clamping plate (36) and the power cylinder respectively. The two sprockets (310) are connected by a chain (311). The input end of the power motor (312) is electrically connected to the output end of the external power supply through an external control switch group.

4. The welding apparatus for overlay welding of various forgings according to claim 1, characterized in that: The welding unit (4) includes a rectangular top plate (41), a rectangular slider (42), and an electric push rod (43). The front side of the support rod (2) is fixedly connected to a rectangular top plate (41) on the upper side of the fixed horizontal plate (31). A sliding groove (3) is provided on the rectangular top plate (41). The sliding groove (3) passes through the upper and lower sides of the rectangular top plate (41). A rectangular slider (42) is slidably connected in the sliding groove (3). A push block (1) is provided on the upper side of the rectangular slider (42). The rectangular top plate (41) is fixedly connected to the electric push rod (43) on the left side of the sliding groove (3) through a support frame. The extension end of the electric push rod (43) is fixedly connected to the corresponding push block (1). The input end of the electric push rod (43) is electrically connected to the output end of the external power supply through an external control switch group.

5. The welding apparatus for overlay welding of various forgings according to claim 4, characterized in that: The welding unit (4) also includes an electric push rod three (44), a fixed frame (45), a welding gun head (46), and a welding rod guide pipe (47). An electric push rod three (44) is provided on the lower side of the rectangular slider (42). A fixed frame (45) is provided on the extended end of the electric push rod three (44). A circular hole two is opened on the fixed frame (45). A welding rod guide pipe (47) is provided in the circular hole two. The fixed frame (45) is fixedly connected to the welding gun head (46) through a support frame. The welding gun head (46) corresponds to the welding rod guide pipe (47). The input end of the electric push rod three (44) is electrically connected to the output end of the external power supply through an external control switch group.

6. The welding apparatus for overlay welding of various forgings according to claim 5, characterized in that: The welding unit (4) also includes a conveyor roller (48), a gear (49) and a second power motor (410). The mounting bracket (45) is provided with a mounting plate on the front and rear sides of the welding rod guide pipe (47). The two mounting plates are rotatably connected to the two conveyor rollers (48). The two conveyor rollers (48) correspond to the welding rod guide pipe (47). The second power motor (410) is fixedly connected to the front side of the mounting plate on the mounting bracket (45). The output shaft of the second power motor (410) is fixedly connected to one of the conveyor rollers (48). The two conveyor rollers (48) are fixedly fitted with a gear (49) on the rear side of the mounting plate. The two gears (49) are meshed with each other. The input end of the second power motor (410) is electrically connected to the output end of the external power supply through an external control switch group.