Adjustable arc welding machine

Abstract

The utility model discloses an adjustable arc welding machine relates to arc welding machine technical field, including frame, the frame top is equipped with rotating component, rotating component drive connection one fixed frame, the fixed frame is sequentially provided with limit component, jet component and clamping component, still be provided with the welding assembly of welding to work piece on the frame. The utility model discloses through setting up jet component, and the welding protective gas needs stably to cover the molten pool. The motor direct drive jet piece speed can be too fast, and the protective gas is easy to blow away, through multistage reduction, can reduce the speed of jet piece to a very low and accurate controllable range, no matter how the workpiece below rotates, this encircles workpiece also in the rotating annular air curtain, can continuously cover above welding molten pool. Avoid fixed nozzle when rotating welding, and the protective gas is delayed because of relative movement, makes the gas be blown away, leads to uneven protection, produces the problem of blowhole and oxidation.

Description

Technical Field

[0001] This utility model relates to the field of arc welding machine technology, specifically an adjustable arc welding machine. Background Technology

[0002] Arc welding, as a common material joining method, is widely used in various industrial fields such as machinery manufacturing, steel structure construction, and pipeline construction. During the welding process, especially when performing pipe butt welding, circumferential weld welding, or multi-angle welding, it is often necessary to adjust the welding angle of the workpiece according to process requirements to ensure the optimal welding torch position and weld formation quality.

[0003] An existing patent (authorization announcement number: CN216680641U) discloses an argon arc welding machine with adjustable welding height. The key technical points of the solution are: the welding height can be adjusted according to the required welding height of the object, and the tilt angle of the argon arc welding gun can be easily adjusted. By setting threaded rods, chains, sliders, moving plates and argon arc welding guns, the two threaded rods are rotatably connected inside the support frame. The first gear and the second gear on the surface of the two threaded rods are rotatably connected by the chain, which can easily drive the two threaded rods to rotate at the same time. The threaded rods drive the slider on the surface to move up and down, and the slider drives the moving plate and the argon arc welding gun to move, which can easily adjust the welding height as needed.

[0004] However, the above-mentioned technical solutions still have certain drawbacks. When welding materials such as stainless steel and aluminum alloys, inert gas is required to protect the weld pool. When the workpiece rotates, the traditional fixed air nozzle cannot evenly cover the changing welding position, resulting in the loss of protective gas, exposing the weld pool to the air, causing oxidation, and severely reducing the mechanical properties and corrosion resistance of the weld joint. Therefore, an adjustable arc welding machine is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide an adjustable arc welding machine to solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: An adjustable arc welding machine includes a frame, a rotating assembly mounted on the top of the frame, a fixed frame driven by the rotating assembly, a limit assembly, an air jet assembly and a clamping assembly sequentially arranged on the fixed frame, and a welding assembly for welding workpieces also arranged on the frame. The jet assembly includes a mounting plate fixedly mounted on the mounting frame, a second motor, and an annular jet component; the second motor is fixed to the mounting plate, and its output end drives the jet component to rotate around its central axis through a transmission mechanism.

[0007] Based on the above technical solutions, this utility model also provides the following optional technical solutions: As a further embodiment of this utility model: the clamping assembly includes a fixed plate, an electric push rod, and at least one set of clamping units; the fixed plate is fixedly connected to the mounting plate; the electric push rod is fixedly mounted on the fixed plate; the clamping unit includes a first rotating rod and a second rotating rod; The middle part of the first rotating rod is rotatably connected to the fixed plate via a first pivot, one end of which is rotatably connected to the output end of the electric push rod, and the other end is provided with a first clamping part; The middle part of the second rotating rod is rotatably connected to the fixed plate via a second pivot. One end of the rod is provided with a second clamping part, and the other end is rotatably connected to the end of the first rotating rod near the electric push rod via a connecting rod. The second rotating rod drives the second connecting rod and the third rotating rod in the same way.

[0008] As a further embodiment of this utility model: the rotating assembly includes a first motor and a reducer fixedly installed on the top of the frame, and the output shaft of the first motor is drivenly connected to the fixed frame through the reducer.

[0009] As a further embodiment of this utility model: the limiting component includes a support frame and a drive cylinder fixedly installed on the machine frame, and the output end of the drive cylinder is provided with a pressure block for pressing the workpiece.

[0010] As a further embodiment of this utility model: the welding assembly includes a bracket fixedly mounted on the frame, a guide rail fixedly mounted on the bracket, a movable seat slidably mounted on the guide rail, a cylinder disposed on the side of the movable seat, and a welding torch fixedly mounted on the output end of the cylinder.

[0011] As a further embodiment of this utility model: the transmission mechanism includes: a first gear fixedly mounted on the output shaft of the second motor; a second gear connected to the first gear via a belt; a third gear fixed coaxially with the second gear; and a gear ring meshing with the third gear; the inner side of the gear ring is fixedly connected to the jet component.

[0012] As a further improvement of this utility model, the inner sides of the first clamping part and the second clamping part are provided with anti-slip textures or replaceable flexible washers.

[0013] As a further improvement of this utility model: the jetting component is an annular air pipe with jetting holes evenly distributed on its inner side; the adjustable arc welding machine also includes an air storage tank, which is connected to the jetting component through a rotary joint.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model, by setting up an air jet assembly, ensures that the welding shielding gas stably covers the molten pool. Directly driving the air jet with a motor would result in excessively high rotation speeds, easily dispersing the shielding gas. Through multi-stage deceleration, the rotation speed of the air jet can be reduced to a very low and precisely controllable range. Regardless of the rotation of the workpiece below, this annular air curtain, which also rotates around the workpiece, can continuously cover the weld pool. This avoids the problem of the shielding gas lagging due to relative motion when the nozzle is fixed during rotating welding, causing the gas to be dispersed, resulting in uneven shielding, porosity, and oxidation.

[0015] 2. This utility model, by setting up a clamping assembly, mechanically connects all rotating rods together through rigid linkages. Their movements are forced to be synchronized. Regardless of the slight irregularity in the shape of the workpiece, all clamping parts will contact the workpiece surface at the same moment and continuously apply pressure until fully stopped. This ensures that the workpiece can be automatically adjusted and fixed in the center position of the mechanism, avoiding workpiece displacement caused by asynchronous clamping sequence. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the rotating assembly of this utility model; Figure 3 For the present utility model Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the jet assembly of this utility model; Figure 5 This is a schematic diagram of the internal structure of the jet assembly of this utility model; Figure 6 This is a schematic diagram of the welding assembly of this utility model.

[0017] Figure reference numerals: 1. Frame; 2. Rotating assembly; 3. Limiting assembly; 4. Clamping assembly; 5. Air jet assembly; 6. Welding assembly; 21. First motor; 22. Mounting frame; 31. Support frame; 32. Drive cylinder; 33. Pressure block; 41. Electric push rod; 42. Fixed plate; 43. First rotating rod; 44. First connecting rod; 45. Second rotating rod; 46. Second connecting rod; 47. Third rotating rod; 51. Mounting plate; 52. Second motor; 53. First gear; 54. Second gear; 55. Third gear; 56. Gear ring; 57. Jet jet; 61. Bracket; 62. Guide rail; 63. Movable base; 64. Cylinder; 65. Welding torch. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0019] In one embodiment, such as Figures 1-6 As shown, an adjustable arc welding machine includes a frame 1, a rotating component 2 is mounted on the top of the frame 1, the rotating component 2 is driven to connect a fixed frame 22, a limit component 3, an air jet component 5 and a clamping component 4 are sequentially arranged on the fixed frame 22, and a welding component 6 for welding workpieces is also provided on the frame 1. In this embodiment, the clamping component 4 first acts to clamp the workpiece radially to the center of the equipment. Then, the limiting component 3 presses the workpiece axially downward to prevent it from moving or jumping during rotation or welding. The welding torch 65 of the welding component 6 moves to the preset welding position and adjusts the welding angle of the pipe fitting by rotating component 2. The jetting component 5 is activated to spray protective gas into the weld pool area to protect the welding of the pipe fitting.

[0020] In one embodiment, as shown in the figure, the clamping assembly 4 includes a fixed plate 42, an electric push rod 41, and at least one set of clamping units; the fixed plate 42 is fixedly connected to the mounting plate 51; the electric push rod 41 is fixedly mounted on the fixed plate 42; the clamping unit includes a first rotating rod 43 and a second rotating rod 45; the middle part of the first rotating rod 43 is rotatably connected to the fixed plate 42 via a first pivot, one end of which is rotatably connected to the output end of the electric push rod 41, and the other end is provided with a first clamping part; the middle part of the second rotating rod 45... The first rotating rod 43 is rotatably connected to the fixed plate 42 via a second pivot. One end of the second rotating rod 45 has a second clamping part, and the other end is rotatably connected to the end of the first rotating rod 43 near the electric push rod 41 via a connecting rod. The second rotating rod 45 drives the second connecting rod 46 and the third rotating rod 47 in the same manner. Under the restraint of the connecting rod, the first rotating rod 43 and the second rotating rod 45 are in an open position, with the distance between the first clamping part and the second clamping part at its maximum, facilitating the placement of the workpiece. The piston rod of the electric push rod 41 extends outward, pushing the right end of the first rotating rod 43. Since the middle part of the first rotating rod 43 is fixed to the fixed plate 42 by the first pivot, it acts as a lever, and its left end swings towards the center, achieving the first clamping action. Simultaneously, the movement of the right end of the first rotating rod 43 is transmitted to the right end of the second rotating rod 45 via the connecting rod. Similarly, the middle part of the second rotating rod 45 is fixed by the second pivot, and it also acts as a lever, causing its left end to swing towards the center. The electric push rod 41 extends fully, and the three clamping parts clamp the workpiece synchronously from both sides. As a supplement, the inner sides of the first and second clamping parts are provided with anti-slip textures or replaceable flexible washers. The flexible washers undergo slight elastic deformation when subjected to clamping force. This deformation allows them to adapt to the microscopic unevenness of the workpiece surface, thereby increasing the actual contact area and preventing damage to the pipe fitting during clamping.

[0021] In one embodiment, as shown in the figure, the limiting component 3 includes a support frame 31 and a drive cylinder 32 fixedly mounted on the frame. The output end of the drive cylinder 32 is provided with a pressure block 33 for pressing the workpiece. When the workpiece is placed in place on the clamping component 4, the control system issues a command, and the piston rod of the drive cylinder 32 extends downward. The pressure block 33 installed at the end of the piston rod moves downward until its bottom surface is firmly pressed against the side of the workpiece. Under the state of pressure block 33 pressing, the welding program starts to ensure the stability of welding.

[0022] In one embodiment, as shown in the figure, the rotating assembly 2 includes a first motor 21 and a reducer fixedly mounted on the top of the frame 1. The output shaft of the first motor 21 is driven to be connected to the fixed frame 22 through the reducer. The first motor 21 drives the fixed frame 22 to rotate, thereby causing all components mounted on the fixed frame 22 to rotate, thereby adjusting the angle for welding the pipe fittings.

[0023] In one embodiment, as shown in the figure, the welding assembly 6 includes a bracket 61 fixedly mounted on the frame 1, a guide rail 62 fixedly mounted on the bracket 61, a movable seat 63 slidably mounted on the guide rail 62, a cylinder 64 disposed on the side of the movable seat 63, and a welding torch 65 fixedly mounted on the output end of the cylinder 64. The guide rail 62 is fixed on the bracket 61 to help the welding torch 65 move. By manually pushing the movable seat 63, the movable seat 63 can slide on the guide rail 62. After the movable seat 63 is positioned, the cylinder 64 starts to move, helping the tip of the welding torch 65 to finally reach the ideal distance from the workpiece surface.

[0024] In one embodiment, as shown in the figure, the jet assembly 5 includes a mounting plate 51 fixedly mounted on the mounting bracket 22, a second motor 52, and an annular jet element 57. The second motor is fixed to the mounting plate 51, and its output end drives the jet element 57 to rotate around its central axis through a transmission mechanism. The transmission mechanism includes: a first gear 53 fixedly mounted on the output shaft of the second motor; a second gear 54 connected to the first gear 53 via a belt; a third gear 55 coaxially fixed to the second gear 54; and a gear ring 56 meshing with the third gear 55. The inner side of the gear ring 56 is fixedly connected to the jet element 57. When the second motor 52 starts, it drives the first gear 53 to rotate. The first gear 53 drives the second gear 54 to rotate via the belt. At the same time, the second gear 54 and the third gear 55 rotate coaxially, which in turn drives the gear ring 56 to rotate around the pipe through the third gear 55. This causes the entire jet element 57 to rotate synchronously around its central axis. The welding shielding gas needs to cover the molten pool evenly and stably. Directly driving the jet element 57 with the motor would result in excessively high rotation speed, which could easily disperse the shielding gas. By using multi-stage deceleration, the rotational speed of the jet component 57 can be reduced to a stable range, thereby forming a stable, rotating gas barrier that isolates air to the greatest extent and improves welding quality.

[0025] In one embodiment, as shown in the figure, the jetting element 57 is an annular gas pipe with jet holes evenly distributed on its inner side; the adjustable arc welding machine also includes a gas storage tank, which is connected to the jetting element 57 via a rotary joint; the gas storage tank stores protective gas and delivers it to the jetting element 57 via the rotary joint, and the gas is ejected from the jet holes evenly distributed on the inner side of the annular gas pipe, completely enveloping the molten pool area of ​​the workpiece being welded.

[0026] The above embodiment discloses an adjustable arc welding machine, in which the operator places the workpiece in the initial position of the clamping assembly 4. Upon starting the equipment, the electric push rod 41 actuates, driving multiple clamping parts to move synchronously from all sides towards the center via the cleverly designed clamping assembly 4, automatically centering and firmly clamping the workpiece. The drive cylinder 32 of the limiting assembly 3 actuates, pushing the pressure block 33 downwards to press the end of the workpiece or a specific position. At this time, the moving seat 63 is manually slid along the guide rail 62, and fine-tuned by the cylinder 64, so that the welding torch 65 is precisely moved to the weld start point and maintained at a suitable distance. The welding angle is adjusted by the rotating assembly 2. The second motor 52 of the jet assembly 5 starts, driving the annular jet component 57 to begin stable rotation through a multi-stage gear transmission mechanism. The workpiece is driven to rotate through a specialized drive structure, performing rotary welding on the workpiece.

[0027] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An adjustable arc welding machine, comprising a frame (1), characterized in that, A rotating assembly (2) is installed on the top of the frame (1). The rotating assembly (2) drives and connects to a fixed frame (22). A limit assembly (3), an air jet assembly (5) and a clamping assembly (4) are sequentially arranged on the fixed frame (22). A welding assembly (6) for welding workpieces is also provided on the frame (1). The jet assembly (5) includes a mounting plate (51) fixedly mounted on the mounting bracket (22), a second motor (52) and an annular jet element (57); the second motor is fixed on the mounting plate (51), and its output end drives the jet element (57) to rotate around its central axis through a transmission mechanism.

2. The adjustable arc welding machine according to claim 1, characterized in that, The clamping assembly (4) includes a fixed plate (42), an electric push rod (41), and at least one set of clamping units; the fixed plate (42) is fixedly connected to the mounting plate (51); the electric push rod (41) is fixedly mounted on the fixed plate (42); the clamping unit includes a first rotating rod (43) and a second rotating rod (45). The middle part of the first rotating rod (43) is rotatably connected to the fixed plate (42) via a first pivot. One end of the rod is rotatably connected to the output end of the electric push rod (41), and the other end is provided with a first clamping part. The middle part of the second rotating rod (45) is rotatably connected to the fixed plate (42) via a second pivot. One end of the rod is provided with a second clamping part, and the other end is rotatably connected to the end of the first rotating rod (43) near the electric push rod (41) via a connecting rod. The second rotating rod (45) drives the second connecting rod (46) and the third rotating rod (47) in the same way.

3. The adjustable arc welding machine according to claim 1, characterized in that, The rotating assembly (2) includes a first motor (21) and a reducer fixedly mounted on the top of the frame (1), and the output shaft of the first motor (21) is driven to the fixed frame (22) through the reducer.

4. An adjustable arc welding machine according to claim 3, characterized in that, The limiting component (3) includes a support frame (31) and a drive cylinder (32) fixedly installed on the frame (1). The output end of the drive cylinder (32) is provided with a pressure block (33) for pressing the workpiece.

5. An adjustable arc welder as defined in claim 1 wherein, The welding assembly (6) includes a bracket (61) fixedly mounted on the frame (1), a guide rail (62) fixedly mounted on the bracket (61), a movable seat (63) slidably mounted on the guide rail (62), a cylinder (64) disposed on the side of the movable seat (63), and a welding torch (65) fixedly mounted on the output end of the cylinder (64).

6. An adjustable arc welding machine according to claim 1, characterized in that, The transmission mechanism includes: a first gear (53) fixedly mounted on the output shaft of the second motor; a second gear (54) connected to the first gear (53) via a belt; a third gear (55) fixed coaxially with the second gear (54); and a gear ring (56) meshing with the third gear (55); the inner side of the gear ring (56) is fixedly connected to the jet component (57).

7. An adjustable arc welding machine according to claim 2, characterized in that, The inner sides of the first clamping part and the second clamping part are provided with anti-slip textures or replaceable flexible washers.

8. An adjustable arc welding machine according to claim 1, characterized in that, The jetting component (57) is an annular air pipe with jet holes evenly distributed on its inner side; the adjustable arc welding machine also includes an air storage tank, which is connected to the jetting component (57) through a rotary joint.

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