Auxiliary welding device for hardware fitting machining

Abstract

The invention belongs to the technical field of welding auxiliary devices, and particularly relates to a hardware fitting machining welding auxiliary device which comprises a machining table, the upper end of the machining table is connected with a top plate through a lifting mechanism, the lower end of the top plate is rotationally connected with a rotating plate, and the lower end of the rotating plate is fixedly connected with a fixing box. A welding gun adjusting mechanism is arranged below the fixing box and comprises a first shaft rod rotationally connected to the front inner wall and the rear inner wall of the fixing box, a first motor for driving the first shaft rod to rotate is fixedly installed in the fixing box, and the front end and the rear end of the first shaft rod extend out of the fixing box and are connected with extension pieces. A welding gun is installed at the lower end of the extension piece through a fixing sleeve frame, and a linkage assembly is arranged on the extension piece. According to the invention, the angular velocity of girth welding can be automatically adjusted according to the diameter of a welding seam of a flange joint needing to be welded, and the position adjustment work of the welding gun is simpler and more convenient.

Description

Technical Field

[0001] The invention relates to the technical field of welding auxiliary devices, and in particular to a welding auxiliary device for processing hardware accessories. Background Art

[0002] Flange joints are key connection components in hardware accessories and are widely used in pipeline systems, mechanical equipment and industrial facilities. Their core function is to achieve reliable and detachable sealing connections and adapt to complex working conditions.

[0003] During the manufacturing process of flange joints, the flange plate needs to be welded together with a part of the pipe. The current welding technology is generally circumferential welding, that is, the welding head moves in a circle around the workpiece to complete the annular weld. However, when welding flange joints of different diameters, the welding gun needs to be adjusted according to the position of the weld, and the welding head needs to be aligned with the weld at a forty-five degree angle to ensure the welding effect. After adjusting the position of the welding gun, the speed of the motor that controls the rotation of the welding gun also needs to be adjusted, and the adjustment work is time-consuming and laborious.

[0004] In order to solve the above problems, we proposed a welding auxiliary device for processing hardware accessories. Summary of the invention

[0005] The purpose of the present invention is to solve the problems in the background technology and to propose a welding auxiliary device for processing hardware accessories.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a welding auxiliary device for hardware accessories processing, comprising a processing table, the upper end of the processing table is connected to a top plate through a lifting mechanism, the lower end of the top plate is rotatably connected to a rotating plate, the lower end of the rotating plate is fixedly connected to a fixed box, a welding gun adjustment mechanism is provided below the fixed box, the welding gun adjustment mechanism comprises a first shaft rod rotatably connected to the front and rear inner walls of the fixed box, a first motor driving the first shaft rod to rotate is fixedly installed in the fixed box, the front and rear ends of the first shaft rod extend out of the fixed box and are connected to an extension piece, the lower end of the extension piece is equipped with a welding gun through a fixed sleeve frame, and a linkage assembly is provided on the extension piece; A gear ring is fixedly sleeved on the outer circumferential surface of the top plate, and a driving gear is meshed outside the gear ring. A speed change drive mechanism is provided on the fixed box, and the speed change drive mechanism includes two frame plates fixedly connected to the right end of the fixed box, a transmission assembly is provided between the two frame plates, a hydraulic conveying part is provided behind the frame plates, and a second motor is fixedly installed on the frame plate located below, and the second motor drives the driving gear to rotate through the transmission assembly.

[0007] In the above-mentioned welding auxiliary device for hardware accessories processing, the lifting mechanism includes four hydraulic telescopic rods fixedly installed on the processing table and distributed in a rectangular shape, and the telescopic ends of the four hydraulic telescopic rods are fixedly connected to the upper end of the top plate through a connecting plate.

[0008] In the above-mentioned welding auxiliary device for hardware accessories processing, the extension part is composed of a rotating frame, an extension plate and a fixed frame, the extension plate is fixedly connected between the rotating frame and the fixed frame, the rotating frame is U-shaped, and its two side inner walls are respectively fixedly connected to the front and rear ends of the first shaft rod, the fixed frame is n-shaped and the front and rear inner walls are rotatably connected with coaxially arranged second shaft rods, and the opposite ends of the two second shaft rods are fixedly connected to the fixed sleeve frame.

[0009] In the above-mentioned welding auxiliary device for hardware accessories processing, the linkage assembly includes a fixed plate fixedly connected to the front end of the fixed box, a first bevel gear coaxially arranged with the first shaft rod is fixedly connected to the fixed plate, a second bevel gear is vertically meshed with the lower end of the first bevel gear, the front end of the second shaft rod located in the front extends to the front end of the fixed frame and is fixedly sleeved with a third bevel gear, a fourth bevel gear is vertically meshed with the lower end of the third bevel gear, a transmission rod is coaxially fixedly connected between the second bevel gear and the fourth bevel gear, and the first bevel gear, the second bevel gear, the third bevel gear and the fourth bevel gear have the same specifications.

[0010] In the above-mentioned welding auxiliary device for hardware accessories processing, the transmission assembly includes a first rotating rod and a second rotating rod rotatably connected between two frame plates, the output end of the second motor is coaxially fixedly connected to the lower end of the first rotating rod, a first fixed cone disk with a cone surface facing upward is fixedly sleeved on the first rotating rod, a first movable cone disk with a cone surface facing downward is slidably sleeved on the first rotating rod and above the first fixed cone disk, a first annular telescopic cylinder is fixedly sleeved on the first rotating rod, the telescopic end of the first annular telescopic cylinder is fixedly connected to the upper end of the first movable cone disk, a second fixed cone disk with a cone surface facing downward is fixedly sleeved on the second rotating rod, a second movable cone disk with a cone surface facing upward is slidably sleeved on the second rotating rod and below the second fixed cone disk, a second annular telescopic cylinder is fixedly sleeved on the second rotating rod, the telescopic end of the second annular telescopic cylinder is fixedly connected to the lower end of the second movable cone disk, the first fixed cone disk and the first movable cone disk constitute a first V-shaped transmission wheel, the second fixed cone disk and the second movable cone disk constitute a second V-shaped transmission wheel, and a transmission belt is commonly sleeved between the first V-shaped transmission wheel and the second V-shaped transmission wheel.

[0011] In the above-mentioned welding auxiliary device for hardware accessories processing, the hydraulic conveying part includes two arc-shaped piston cylinders fixedly connected to the rear end of the fixed box, the two arc-shaped piston cylinders are symmetrically arranged up and down and concentric with the first shaft rod, and piston blocks are sealed and slidably connected in the two arc-shaped piston cylinders. The left ends of the two piston blocks are commonly fixedly connected to a pushing arc rod, the pushing arc rod is concentrically arranged with the first shaft rod and is fixedly connected to a connecting rod in the middle position, and the end of the connecting rod away from the pushing arc rod is fixedly connected to the rear end of the first shaft rod, the right ends of the two arc-shaped piston cylinders are commonly fixedly connected to a connecting block, the right end of the arc-shaped piston cylinder located above and the second annular telescopic cylinder are commonly connected by a first oil pipe, and the right end of the arc-shaped piston cylinder located below and the first annular telescopic cylinder are commonly connected by a second oil pipe.

[0012] In the above-mentioned welding auxiliary device for hardware accessories processing, four sliding openings distributed in a cross shape are opened at the center position of the processing table, and a cross pneumatic clamp is installed at the lower end of the processing table. The four clamping ends of the cross pneumatic clamp respectively pass through the four sliding openings and extend to the top of the processing table.

[0013] Compared with the prior art, the advantages of the present invention are: This device can assist the welding gun in performing circumferential welding on flange joints of different diameters. The welding gun head can be quickly moved to the weld of the flange joint through the lifting mechanism and the welding gun adjustment mechanism, and the welding gun head can be automatically kept aligned with the weld at a forty-five-degree angle. The welding point of the welding gun can be adjusted without disassembly and manual pushing, thereby quickly completing the welding preparation work.

[0014] By setting up a variable speed drive mechanism, under the premise that the welding gun can be driven to move in a circle around the flange joint, the rotation speed can be automatically adjusted by adjusting the position of the welding gun, and the circumferential seam welding of flange joints of different diameters can be performed at a suitable rotation speed. There is no need to adjust the rotation speed of the second motor, and the welding effect of the weld can be guaranteed within a unit time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of a welding auxiliary device for hardware accessories processing proposed by the present invention; Figure 2 This is a structural schematic diagram of another perspective of a welding auxiliary device for hardware accessories processing proposed by the present invention; Figure 3 This is a schematic diagram of the connection between the top plate and the welding gun adjustment mechanism in a welding auxiliary device for hardware accessories processing proposed by the present invention; Figure 4 This is a structural schematic diagram of a welding gun adjustment mechanism in a welding auxiliary device for hardware accessories processing proposed by the present invention; Figure 5This is a structural schematic diagram of a variable speed drive mechanism in a welding auxiliary device for hardware accessories processing proposed by the present invention; Figure 6 This is a structural schematic diagram of another perspective of a variable speed drive mechanism in a welding auxiliary device for hardware accessories processing proposed by the present invention; Figure 7 This is a structural schematic diagram of a hydraulic conveying component in a welding auxiliary device for hardware accessories processing proposed by the present invention; Figure 8 The present invention provides a schematic structural diagram of a processing table in a welding auxiliary device for processing hardware accessories.

[0016] In the figure: 1 processing table, 2 top plate, 3 hydraulic telescopic rod, 4 connecting plate, 5 rotating plate, 6 fixed box, 7 first shaft rod, 8 first motor, 9 rotating frame, 10 extension plate, 11 fixed frame, 12 welding gun, 13 second shaft rod, 14 fixed sleeve frame, 15 first bevel gear, 16 fixed plate, 17 second bevel gear, 18 third bevel gear, 19 fourth bevel gear, 20 transmission rod, 21 gear ring, 22 frame, 23 first rotating rod, 24 second rotating rod, 25 driving gear, 26 second motor, 27 first fixed cone disk, 28 first movable cone disk, 29 first annular telescopic cylinder, 30 second fixed cone disk, 31 second movable cone disk, 32 second annular telescopic cylinder, 33 transmission belt, 34 arc piston cylinder, 35 piston block, 36 push arc rod, 37 connecting rod, 38 connecting block, 39 first oil pipe, 40 second oil pipe, 41 cross pneumatic clamp. DETAILED DESCRIPTION

[0017] The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0018] Reference Figure 1-Figure 8 A welding auxiliary device for processing hardware accessories includes a processing table 1, and four sliding openings distributed in a cross shape are opened at the center of the processing table 1. A cross pneumatic clamp 41 is installed at the lower end of the processing table 1. The four clamping ends of the cross pneumatic clamp 41 respectively penetrate the four sliding openings and extend to the top of the processing table 1. The cross pneumatic clamp 41 is a prior art, and the four clamping ends can be synchronously moved inward or outward. Before welding the flange joint, it is only necessary to stack the flange and the pipe on the processing table 1, and make the four clamping ends of the cross pneumatic clamp 41 located at the inner hole of the flange and the pipe. The inner hole of the flange and the pipe can be internally supported and positioned by synchronously moving the four clamping ends outward, so that the flange and the pipe are concentrically stacked and are in a state to be welded. In this state, the flange joint is in the center of the processing table 1. The setting of the cross pneumatic clamp 41 can perform stable internal support positioning work on flange joints of different diameters to be welded on the processing table 1.

[0019] The upper end of the processing table 1 is connected to the top plate 2 through a lifting mechanism. The lifting mechanism includes four hydraulic telescopic rods 3 fixedly installed on the processing table 1 and distributed in a rectangular shape. The telescopic ends of the four hydraulic telescopic rods 3 are fixedly connected to the upper end of the top plate 2 through a connecting plate 4. The four hydraulic telescopic rods 3 work synchronously to drive the top plate 2 to rise and fall vertically.

[0020] The lower end of the top plate 2 is rotatably connected to a rotating plate 5, and the lower end of the rotating plate 5 is fixedly connected to a fixed box 6. A welding gun adjustment mechanism is provided below the fixed box 6 for adjusting the position of the welding gun 12. The welding gun adjustment mechanism includes a first shaft rod 7 rotatably connected to the front and rear inner walls of the fixed box 6, and a first motor 8 is fixedly installed in the fixed box 6 to drive the first shaft rod 7 to rotate. The front and rear ends of the first shaft rod 7 extend out of the fixed box 6 and are connected to an extension piece. The lower end of the extension piece is equipped with a welding gun 12 through a fixed sleeve frame 14. The first motor 8 drives the first shaft rod 7 to rotate, thereby driving the extension piece and the welding gun 12 to rotate at a certain angle with the first shaft rod 7 as the axis, thereby facilitating the movement of the welding gun 12 to make it close to the weld of the flange joint. The extension piece is composed of a rotating frame 9, an extension plate 10 and a fixed frame 11. The extension plate 10 is fixedly connected between the rotating frame 9 and the fixed frame 11. The rotating frame 9 is U-shaped, which is convenient for rotation without being affected by the fixed box 6. The inner walls on both sides of the rotating frame 9 are fixedly connected to the front and rear ends of the first shaft rod 7 respectively. The fixed frame 11 is n-shaped and the front and rear inner walls are rotatably connected with a coaxially arranged second shaft rod 13. The opposite ends of the two second shaft rods 13 are fixedly connected to the fixed sleeve frame 14. The fixed sleeve frame 14 is used to install the welding gun 12. The setting of the second shaft rod 13 facilitates the subsequent angle adjustment of the welding gun 12.

[0021] A linkage assembly is provided on the extension piece, and the linkage assembly includes a fixed plate 16 fixedly connected to the front end of the fixed box 6, and a first bevel gear 15 coaxially arranged with the first shaft rod 7 is fixedly connected to the fixed plate 16. The first bevel gear 15 is located in front of the rotating frame 9, and the lower end of the first bevel gear 15 is vertically meshed with a second bevel gear 17. The front end of the second shaft rod 13 located in the front extends to the front end of the fixed frame 11 and is fixedly sleeved with a third bevel gear 18. The lower end of the third bevel gear 18 is vertically meshed with a fourth bevel gear 19, and a transmission rod 20 is coaxially fixedly connected between the second bevel gear 17 and the fourth bevel gear 19. The first bevel gear 15, the second bevel gear 17, the third bevel gear 18 and the fourth bevel gear 19 have the same specifications.

[0022] Specifically, since the first bevel gear 15 is in a fixed state and cannot rotate, and the extension piece is stationary, the welding gun 12 fixed by the second shaft rod 13 and the fixed sleeve frame 14 cannot rotate either. When the first motor 8 drives the extension piece to rotate clockwise inwardly of the processing table 1, the second bevel gear 17 can roll the same angle on the stationary first bevel gear 15, and under the transmission of the transmission rod 20, the third bevel gear 18 and the fourth bevel gear 19, the second shaft rod 13 can drive the welding gun 12 to rotate the same angle in the counterclockwise direction.

[0023] It should be noted that the initial position of the extension piece is perpendicular to the processing table 1. At this time, the welding head of the welding gun 12 is tilted forty-five degrees toward the center of the processing table 1. Then, no matter how much the extension piece rotates clockwise, the welding gun 12 rotates in the opposite direction by the same angle, so as to always keep the welding head tilted forty-five degrees toward the center of the processing table 1. When the welding head of the welding gun 12 is aligned with the weld of the flange joint at a forty-five-degree angle, the quality of the circumferential seam welding can be guaranteed. Before welding flange joints of different diameters, it is only necessary to control the rotation of the extension piece through the first motor 8 to move the welding head of the welding gun 12 to the position above the weld, and then cooperate with the lifting mechanism to drive the top plate 2 to move downward, so that the welding head of the welding gun 12 can be aligned with the weld at a forty-five-degree angle. Without disassembly and manual pushing, the welding point of the welding gun 12 can be quickly adjusted, thereby smoothly completing the welding preparation work.

[0024] A gear ring 21 is fixedly sleeved on the outer circumference of the top plate 2, and the gear ring 21 is concentrically arranged with the flange joint after being positioned by the inner support. A driving gear 25 is meshed on the outside of the gear ring 21, and a variable speed drive mechanism is provided on the fixed box 6. The variable speed drive mechanism includes two frame plates 22 fixedly connected to the right end of the fixed box 6, a transmission assembly is provided between the two frame plates 22, and a hydraulic conveying member is provided behind the frame plates 22. A second motor 26 is fixedly installed on the frame plate 22 located below, and the second motor 26 drives the driving gear 25 to rotate through the transmission assembly. When the second motor 26 drives the driving gear 25 to rotate, it can drive the fixed box 6 to rotate, so that the welding gun 12 below rotates synchronously. After completing the welding preparation work, the welding gun 12 rotates one circle to complete the circumferential seam welding of the flange joint.

[0025] The transmission assembly includes a first rotating rod 23 and a second rotating rod 24 which are rotatably connected between the two frame plates 22. The output end of the second motor 26 is coaxially fixedly connected to the lower end of the first rotating rod 23. A first fixed cone disk 27 with a cone surface facing upward is fixedly sleeved on the first rotating rod 23. A first movable cone disk 28 with a cone surface facing downward is slidably sleeved on the first rotating rod 23 and above the first fixed cone disk 27. A first annular telescopic cylinder 29 is fixedly sleeved on the first rotating rod 23. The telescopic end of the first annular telescopic cylinder 29 is fixedly connected to the upper end of the first movable cone disk 28. The first annular telescopic cylinder 29 The first movable cone 28 can be pushed to move, so as to adjust the distance from the first fixed cone 27. The second rotating rod 24 is fixedly sleeved with a second fixed cone 30 with the cone surface facing downward. The second rotating rod 24 is slidably sleeved with a second movable cone 31 with the cone surface facing upward at a position below the second fixed cone 30. The second rotating rod 24 is fixedly sleeved with a second annular telescopic cylinder 32. The telescopic end of the second annular telescopic cylinder 32 is fixedly connected to the lower end of the second movable cone 31. The second annular telescopic cylinder 32 can push the second movable cone 31 to move, so as to adjust the distance from the second fixed cone 30. Both the first annular telescopic cylinder 29 and the second annular telescopic cylinder 32 use hydraulic power, and the specifications of the two are the same.

[0026] The first fixed cone disc 27 and the first movable cone disc 28 constitute a first V-shaped transmission wheel, the second fixed cone disc 30 and the second movable cone disc 31 constitute a second V-shaped transmission wheel, and a transmission belt 33 is provided between the first V-shaped transmission wheel and the second V-shaped transmission wheel. The transmission belt 33 is a V-shaped transmission belt, which can play an effective belt transmission role through contact with the conical surfaces of the first V-shaped transmission wheel and the second V-shaped transmission wheel. Then, the second motor 26 can effectively control the welding gun 12 to perform circular motion around the flange joint through the driving gear 25 and the gear ring 21.

[0027] Under the action of the first annular telescopic cylinder 29 and the second annular telescopic cylinder 32, the spacing between the V-grooves of the first V-shaped transmission wheel and the second V-shaped transmission wheel can change. According to the principle of the CVT transmission, as long as the size change of the spacing between the V-grooves of the first V-shaped transmission wheel and the second V-shaped transmission wheel maintains a dynamic balance, the diameters of the two ends of the transmission belt 33 can be changed, thereby generating a speed difference and achieving a speed change effect.

[0028] The hydraulic conveying component includes two arc-shaped piston cylinders 34 fixedly connected to the rear end of the fixed box 6. The two arc-shaped piston cylinders 34 are symmetrically arranged up and down and concentric with the first shaft rod 7. Piston blocks 35 are sealed and slidably connected in the two arc-shaped piston cylinders 34. The left ends of the two piston blocks 35 are commonly fixedly connected to a pushing arc rod 36. The pushing arc rod 36 is concentrically arranged with the first shaft rod 7 and a connecting rod 37 is fixedly connected to the middle position. The end of the connecting rod 37 away from the pushing arc rod 36 is fixedly connected to the rear end of the first shaft rod 7. When the first shaft rod 7 rotates, it can drive the pushing arc rod 36 to rotate, and then drive the two piston blocks 35 to move in the two arc-shaped piston cylinders 34.

[0029] The right ends of the two arc-shaped piston cylinders 34 are fixedly connected with a connecting block 38. The right end of the upper arc-shaped piston cylinder 34 and the second annular telescopic cylinder 32 are connected by a first oil pipe 39. The right end of the lower arc-shaped piston cylinder 34 and the first annular telescopic cylinder 29 are connected by a second oil pipe 40. Under the connection between the first oil pipe 39 and the second oil pipe 40, the two arc-shaped piston cylinders 34 are respectively connected with the second annular telescopic cylinder 32 and the first annular telescopic cylinder 29, and are both filled with hydraulic oil.

[0030] Specifically, when the extension piece and the welding gun 12 are in the initial state, the two piston blocks 35 are both in the middle of the corresponding arc-shaped piston cylinder 34, the expansion and contraction amounts of the first annular telescopic cylinder 29 and the second annular telescopic cylinder 32 are the same, the V-shaped grooves of the first V-shaped transmission wheel and the second V-shaped transmission wheel are the same size, and the diameters of the two ends of the transmission belt 33 are consistent. At this time, the second motor 26 drives the welding gun 12 to rotate at a constant speed ratio, and when the welding position of the welding gun 12 is adjusted, the rotation of the extension piece pushes the arc rod 36 to rotate synchronously, and then the piston block 35 located above can push the hydraulic oil in the arc-shaped piston cylinder 34 into the second annular telescopic cylinder 32, so that the V-shaped groove spacing of the second V-shaped transmission wheel is reduced, and at the same time, the piston block 35 located below can push the first annular The hydraulic oil in the telescopic cylinder 29 is pumped into the arc-shaped piston cylinder 34, so that the V-groove spacing of the first V-type transmission wheel increases. The changes of the first V-type transmission wheel and the second V-type transmission wheel are the same and are carried out synchronously, so that the diameter of the transmission belt 33 located in the first V-type transmission wheel is reduced, and the diameter located in the second V-type transmission wheel is increased. Then, when the speed of the second motor 26 remains unchanged, the speed of the driving gear 25 is reduced, so that the speed of the circumferential seam welding of the welding gun 12 is reduced, and the speed reduction varies with the rotation amount of the extension piece. The larger the rotation angle of the extension piece, the smaller the V-groove spacing of the first V-type transmission wheel, and the larger the diameter of the transmission belt 33 at this position. Similarly, the larger the V-groove spacing of the second V-type transmission wheel, the smaller the diameter of the transmission belt 33 at this position.

[0031] Furthermore, when the device performs circumferential welding on a flange joint with a smaller weld diameter, the moving angular velocity of the welding head of the welding gun 12 is smaller, and then there is no need to adjust the rotation speed of the second motor 26, and the rotation speed of the welding gun 22 is automatically reduced to ensure the welding effect of the weld within a unit time.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A welding auxiliary device for processing hardware accessories, comprising a processing table (1), characterized in that: The upper end of the processing table (1) is connected to a top plate (2) via a lifting mechanism, the lower end of the top plate (2) is rotatably connected to a rotating plate (5), the lower end of the rotating plate (5) is fixedly connected to a fixed box (6), a welding gun adjustment mechanism is provided below the fixed box (6), the welding gun adjustment mechanism comprises a first shaft rod (7) rotatably connected to the front and rear inner walls of the fixed box (6), a first motor (8) for driving the first shaft rod (7) to rotate is fixedly installed in the fixed box (6), the front and rear ends of the first shaft rod (7) extend out of the fixed box (6) and are connected to an extension piece, the lower end of the extension piece is equipped with a welding gun (12) via a fixed sleeve frame (14), and a linkage assembly is provided on the extension piece; A gear ring (21) is fixedly sleeved on the outer peripheral surface of the top plate (2), and a driving gear (25) is meshed outside the gear ring (21). A speed change driving mechanism is provided on the fixed box (6), and the speed change driving mechanism includes two frame plates (22) fixedly connected to the right end of the fixed box (6), a transmission assembly is provided between the two frame plates (22), a hydraulic conveying member is provided behind the frame plates (22), and a second motor (26) is fixedly installed on the frame plate (22) located at the bottom, and the second motor (26) drives the driving gear (25) to rotate through the transmission assembly.

2. A welding auxiliary device for hardware accessories processing according to claim 1, characterized in that: The lifting mechanism comprises four hydraulic telescopic rods (3) which are fixedly mounted on the processing table (1) and are distributed in a rectangular shape, and the telescopic ends of the four hydraulic telescopic rods (3) are fixedly connected to the upper end of the top plate (2) via a connecting plate (4).

3. A welding auxiliary device for hardware accessories processing according to claim 1, characterized in that: The extension member is composed of a rotating frame (9), an extension plate (10) and a fixed frame (11); the extension plate (10) is fixedly connected between the rotating frame (9) and the fixed frame (11); the rotating frame (9) is U-shaped, and the inner walls on both sides thereof are respectively fixedly connected to the front and rear ends of the first shaft rod (7); the fixed frame (11) is N-shaped and the front and rear inner walls are both rotatably connected to coaxially arranged second shaft rods (13); and the opposite ends of the two second shaft rods (13) are fixedly connected to the fixed sleeve frame (14).

4. A welding auxiliary device for hardware accessories processing according to claim 3, characterized in that: The linkage assembly comprises a fixing plate (16) fixedly connected to the front end of the fixing box (6); a first bevel gear (15) coaxially arranged with the first shaft (7) is fixedly connected to the fixing plate (16); a second bevel gear (17) is vertically meshed at the lower end of the first bevel gear (15); a front end of the second shaft (13) located in the front extends to the front end of the fixing frame (11) and is fixedly sleeved with a third bevel gear (18); a fourth bevel gear (19) is vertically meshed at the lower end of the third bevel gear (18); a transmission rod (20) is coaxially fixedly connected between the second bevel gear (17) and the fourth bevel gear (19); and the first bevel gear (15), the second bevel gear (17), the third bevel gear (18) and the fourth bevel gear (19) have the same specifications.

5. A welding auxiliary device for hardware accessories processing according to claim 1, characterized in that: The transmission assembly comprises a first rotating rod (23) and a second rotating rod (24) which are rotatably connected between two frame plates (22); an output end of the second motor (26) is coaxially fixedly connected to a lower end of the first rotating rod (23); a first fixed cone disk (27) with a cone surface facing upward is fixedly sleeved on the first rotating rod (23); a first movable cone disk (28) with a cone surface facing downward is slidably sleeved on the first rotating rod (23) and above the first fixed cone disk (27); a first annular telescopic cylinder (29) is fixedly sleeved on the first rotating rod (23); a telescopic end of the first annular telescopic cylinder (29) is fixedly connected to an upper end of the first movable cone disk (28); and the second rotating rod (24) A second fixed cone disk (30) with a cone surface facing downward is fixedly sleeved on the upper part; a second movable cone disk (31) with a cone surface facing upward is slidably sleeved on the second rotating rod (24) and below the second fixed cone disk (30); a second annular telescopic cylinder (32) is fixedly sleeved on the second rotating rod (24); the telescopic end of the second annular telescopic cylinder (32) is fixedly connected to the lower end of the second movable cone disk (31); the first fixed cone disk (27) and the first movable cone disk (28) form a first V-shaped transmission wheel; the second fixed cone disk (30) and the second movable cone disk (31) form a second V-shaped transmission wheel; a transmission belt (33) is sleeved between the first V-shaped transmission wheel and the second V-shaped transmission wheel.

6. A welding auxiliary device for hardware accessories processing according to claim 5, characterized in that: The hydraulic conveying member comprises two arc-shaped piston cylinders (34) fixedly connected to the rear end of the fixed box (6), the two arc-shaped piston cylinders (34) are symmetrically arranged up and down and concentric with the first shaft rod (7), the two arc-shaped piston cylinders (34) are sealed and slidably connected with piston blocks (35), the left ends of the two piston blocks (35) are commonly fixedly connected with a push arc rod (36), the push arc rod (36) is concentrically arranged with the first shaft rod (7) and a connecting rod (37) is fixedly connected at the middle position, the end of the connecting rod (37) away from the push arc rod (36) is fixedly connected to the rear end of the first shaft rod (7), the right ends of the two arc-shaped piston cylinders (34) are commonly fixedly connected with a connecting block (38), the right end of the upper arc-shaped piston cylinder (34) and the second annular telescopic cylinder (32) are commonly connected with a first oil pipe (39), and the right end of the lower arc-shaped piston cylinder (34) and the first annular telescopic cylinder (29) are commonly connected with a second oil pipe (40).

7. A welding auxiliary device for hardware accessories processing according to claim 1, characterized in that: The processing table (1) has four sliding openings arranged in a cross shape at the center thereof, and a cross pneumatic clamp (41) is installed at the lower end of the processing table (1). The four clamping ends of the cross pneumatic clamp (41) respectively penetrate the four sliding openings and extend to the top of the processing table (1).

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