A welding device for annular forged tube shafts

Abstract

This utility model relates to the field of welding equipment technology, specifically to a welding device for annular forged tube shafts. It includes a positioning tube and an annular support coaxially fixed to the outer circumference of the positioning tube. A gear ring is coaxially fixed to the outer circumference of the annular support. A base capable of rotating around the annular support is provided outside the annular support. A motor is fixedly connected to the base, and a gear is coaxially fixed to the output shaft of the motor. The gear meshes with the gear ring. A welding mechanism is connected to the base. When the motor drives the gear to rotate, the reaction force generated by the fixed gear ring directly drives the base to rotate around the axis of the annular support. This eliminates the need to rotate the large tube shaft workpiece itself, significantly reducing the power requirements and overall structural complexity of the equipment, making the device more compact and lightweight. Simultaneously, it achieves continuous and uniform circular motion of the welding torch, significantly reducing manual operation and improving welding efficiency. Furthermore, stable motion control ensures the consistency and reliability of the welding quality.

Description

Technical Field

[0001] This utility model relates to the field of welding equipment technology, specifically to a welding device for annular forged pipe shafts. Background Technology

[0002] In the manufacturing process of large annular forged tube shafts such as wind turbine main shafts and drive shafts, it is often necessary to weld annular seams at the ends or specific locations of the tube shaft. These workpieces are typically large and heavy, requiring extremely high welding precision and stability. Currently, common methods for annular welding of such large tube shafts include the workpiece rotation method and the welding torch circling method. The workpiece rotation method involves clamping the tube shaft workpiece on a large lathe or positioner, driving the workpiece to rotate, and fixing the welding torch for welding. However, driving the rotation of large, heavy tube shafts requires a large and expensive power system and support structure, resulting in high equipment costs, high energy consumption, and extremely stringent requirements for the coaxiality and rigidity of the workpiece clamping, making it easy for workpiece sway or vibration to affect the welding quality. The welding torch circling method involves moving the welding torch in a circular motion around a stationary workpiece. However, in the existing welding torch rotation method, the welding torch rotation mechanism is prone to radial runout or axial movement during operation, leading to unstable distance between the welding torch and the weld seam, which seriously affects the uniformity and quality of the weld seam. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a ring-shaped forging tube shaft welding device, which has a compact structure, stable and reliable operation, and can effectively prevent the welding torch from shifting during rotation, thereby improving the stability, positioning accuracy, and ease of adjustment of the welding torch rotation.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A welding device for annular forged tube shafts includes a positioning tube and an annular bracket coaxially fixed to the outer periphery of the positioning tube. A gear ring is coaxially fixed to the outer periphery of the annular bracket. A base capable of rotating around the annular bracket is provided outside the annular bracket. A motor is fixedly connected to the base. A gear is coaxially fixed to the output shaft of the motor. The gear meshes with the gear ring. A welding mechanism is connected to the base.

[0006] Furthermore, the annular support includes two parallel annular plates and a positioning ring fixedly connected to the outer periphery of the two annular plates. The two side edges of the positioning ring extend outward from the annular plates to form flanges. Two central shafts are fixedly connected to the surface of the base facing the positioning tube. Rollers are coaxially rotatably connected to the central shafts. The two rollers are respectively located on both sides of the annular support, and the rollers are configured to roll in contact with the outer edge of the flange.

[0007] Furthermore, a V-shaped groove is formed on the outer circumferential surface of the roller, and the edge of the positioning ring is fitted into the V-shaped groove.

[0008] Furthermore, the welding mechanism includes a first sliding module fixedly connected to the base, a mounting base fixedly connected to the slider of the first sliding module, the mounting base extending to the front end of the base and fixedly connected to a second sliding module, and a welding torch fixedly connected to the slider of the second sliding module; the first sliding module can drive the second sliding module and the welding torch to move in a direction parallel to the axis of the positioning tube, and the second sliding module can drive the welding torch to move in a radial direction perpendicular to the axis of the positioning tube.

[0009] Furthermore, it also includes a support portion, which includes a fixing hoop coaxially fixed to the outside of the fixing tube and a support frame fixedly connected below the fixing hoop. The thickness of the fixing hoop is lower than that of the annular bracket and is far away from the base.

[0010] This utility model provides a welding device for annular forged tube shafts. It has the following beneficial effects:

[0011] 1. The system employs a large-diameter gear ring fixed to a ring-shaped support and a small gear fixed to a base for transmission. When the motor drives the gear to rotate, the reaction force generated by the stationary gear ring directly drives the base to rotate around the axis of the ring-shaped support. This eliminates the need to rotate the bulky tubular workpiece itself, significantly reducing the equipment's power requirements and overall structural complexity, making the device more compact and lightweight. Simultaneously, it achieves continuous, uniform circular motion of the welding torch, significantly reducing manual operation and improving welding efficiency. Furthermore, stable motion control ensures consistent and reliable welding quality.

[0012] 2. The rollers on the base and the V-groove of the positioning ring flange on the annular bracket create a rolling engagement structure, restricting the axial and radial degrees of freedom of the base. This design effectively absorbs vibrations during operation, greatly suppressing radial runout and axial movement of the base during rotation, ensuring extremely smooth rotation of the welding torch around the tube axis. Attached Figure Description

[0013] Figure 1 This is a front view structural diagram of the present utility model;

[0014] Figure 2 This is a partial cross-sectional view of the present invention.

[0015] Figure 3 for Figure 2 A magnified view of part A in the diagram.

[0016] In the diagram: 1. Positioning tube; 2. Annular bracket; 21. Annular plate; 22. Positioning ring; 221. Flange; 3. Gear ring; 4. Base; 5. Motor; 6. Gear; 7. Welding mechanism; 71. First sliding module; 72. Mounting seat; 73. Second sliding module; 74. Welding torch; 8. Central shaft; 9. Roller; 91. V-groove; 10. Support part; 1001. Fixing hoop; 102. Support frame. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] See attached document Figure 1-3 A welding device for annular forged tube shaft includes a positioning tube 1 and an annular support 2 coaxially fixed to the outer periphery of the positioning tube 1. A gear ring 3 is coaxially fixed to the outer periphery of the annular support 2. A base 4 capable of rotating around the annular support 2 is provided outside the annular support 2. A motor 5 is fixedly connected to the base 4. A gear 6 is coaxially fixed to the output shaft of the motor 5. The gear 6 meshes with the gear ring 3. A welding mechanism 7 is connected to the base 4.

[0019] The annular support 2 includes two parallel annular plates 21 and a positioning ring 22 fixedly connected to the outer periphery of the two annular plates 21. The two sides of the positioning ring 22 extend outward from the annular plates 21 to form flanges 221. Two central shafts 8 are fixedly connected to the surface of the base 4 facing the positioning tube 1. Rollers 9 are coaxially rotatably connected to the central shafts 8. The two rollers 9 are respectively located on both sides of the annular support 2. The rollers 9 are configured to roll in contact with the outer edge of the flange 221.

[0020] A V-groove 91 is formed on the outer circumferential surface of the roller 9, and the edge of the positioning ring 22 is fitted into the V-groove 91. The fitting structure of the V-groove 91 and the flange 221 effectively restricts the axial and radial movement of the base 4, ensuring that the base 4 can only rotate stably around the axis of the annular support 2, and effectively absorbs vibrations during operation, greatly suppressing the radial runout and axial movement of the base 4 during rotation, and ensuring that the rotational movement of the welding torch 74 around the tube axis is extremely smooth.

[0021] The welding mechanism 7 includes a first sliding module 71 fixedly connected to the base 4 and a mounting seat 72 fixedly connected to the slider of the first sliding module 71. The mounting seat 72 extends to the front end of the base 4 and is fixedly connected to a second sliding module 73. A welding torch 74 is fixedly connected to the slider of the second sliding module 73. The first sliding module 71 can drive the second sliding module 73 and the welding torch 74 to move in a direction parallel to the axis of the positioning tube 1. The second sliding module 73 can drive the welding torch 74 to move in a radial direction perpendicular to the axis of the positioning tube 1.

[0022] The system also includes a support portion 10, which comprises a fixing clamp 1001 coaxially fixed to the outside of the fixing tube, and a support frame 102 fixedly connected below the fixing clamp 1001. The thickness of the fixing clamp 1001 is lower than that of the annular bracket 2 and is far from the base 4, thus avoiding interference between the support structure and rotating components such as the base 4. The support frame 102 of the support portion 10 provides basic support, and the fixing clamp 1001 on it is coaxially fixed to the outside of the positioning tube 1.

[0023] Working principle: During use, the entire welding device is fixed to the front of the chuck clamp. The forged pipe shaft to be welded is clamped and fixed by the chuck clamp. The coaxial end of the forged pipe shaft passes through and extends to the outside of the positioning tube 1 of the device, ensuring that the part to be welded (usually the end of the pipe shaft or the part requiring a circumferential weld) is exposed to the welding area. The first sliding module 71 is activated, driving the mounting base 72, the second sliding module 73, and the welding torch 74 as a whole to move in a direction parallel to the axis of the positioning tube 1, adjusting the welding torch 74 to the axial position where the weld is located. The second sliding module 73 is activated, driving the welding torch 74 along... The radial movement of the positioning tube 1 adjusts the welding torch 74 to a suitable distance from the weld surface. The motor 5 fixed on the base 4 is started, and the output shaft of the motor 5 drives the gear 6 on it to rotate. The gear 6 meshes with the gear ring 3 coaxially fixed on the outer circumference of the annular bracket 2. Since the rotation of the gear 6 drives the gear ring 3, and the gear ring 3 is fixed on the positioning tube 1 through the annular bracket 2, the reaction force drives the base 4 to rotate circumferentially around the annular bracket 2 and the positioning tube 1. The welding mechanism 7 fixed on the base 4 then performs circumferential rotation, performing continuous and uniform annular welding around the stationary forged tube shaft.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0025] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An annular forged tube shaft welding device characterized by: The device includes a positioning tube (1) and an annular bracket (2) coaxially fixed to the outer periphery of the positioning tube (1). A gear ring (3) is coaxially fixed to the outer periphery of the annular bracket (2). A base (4) capable of rotating around the annular bracket (2) is provided on the outside of the annular bracket (2). A motor (5) is fixedly connected to the base (4). A gear (6) is coaxially fixed to the output shaft of the motor (5). The gear (6) meshes with the gear ring (3). A welding mechanism (7) is connected to the base (4).

2. An apparatus for welding the ends of a ring-forged pipe shaft as set forth in claim 1, wherein: The annular support (2) includes two parallel annular plates (21) and a positioning ring (22) fixedly connected to the outer periphery of the two annular plates (21). The two sides of the positioning ring (22) extend outward from the annular plates (21) to form flanges (221). The base (4) has two central shafts (8) fixedly connected to the surface facing the positioning tube (1). Rollers (9) are coaxially rotatably connected to the central shafts (8). The two rollers (9) are respectively located on both sides of the annular support (2). The rollers (9) are configured to roll in contact with the outer edge of the flange (221).

3. An apparatus for welding the ends of a ring-forged pipe shaft as set forth in claim 2, wherein: The roller (9) has a V-shaped groove (91) on its outer circumference, and the edge of the positioning ring (22) is fitted into the V-shaped groove (91).

4. An apparatus for welding the ends of a ring-forged pipe shaft as set forth in claim 1, wherein: The welding mechanism (7) includes a first sliding module (71) fixedly connected to the base (4) and a mounting seat (72) fixedly connected to the slider of the first sliding module (71). The mounting seat (72) extends to the front end of the base (4) and is fixedly connected to a second sliding module (73). A welding torch (74) is fixedly connected to the slider of the second sliding module (73). The first sliding module (71) can drive the second sliding module (73) and the welding torch (74) to move in a direction parallel to the axis of the positioning tube (1). The second sliding module (73) can drive the welding torch (74) to move in a radial direction perpendicular to the axis of the positioning tube (1).

5. An apparatus for welding the ends of a ring-forged pipe shaft as set forth in claim 1, wherein: It also includes a support part (10), which includes a fixing hoop (1001) coaxially fixed to the outside of the fixing tube and a support frame (102) fixedly connected to the bottom of the fixing hoop (1001). The thickness of the fixing hoop (1001) is lower than that of the annular bracket (2) and is far away from the base (4).

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