Auxiliary turnover device for welding round workpiece

Abstract

The utility model relates to an auxiliary turnover device for welding a round workpiece, and belongs to the technical field of welding auxiliary devices. Comprising a plurality of bases, each base is composed of a top plate, two supporting plates and a bottom plate, the two supporting plates are fixedly connected to the front side and the rear side between the lower surface of the top plate and the upper surface of the bottom plate respectively, and every two bases are connected through two connecting supports with the adjustable length. According to the utility model, the plurality of groups of independent bases and the connecting brackets for connecting the bases are arranged, so that a proper number of bases can be mounted according to the actual length of a circular workpiece to be welded during use, and the bases are connected through the connecting brackets, so that the circular workpieces with different lengths can be supported, and the corresponding welding requirements are met. Besides, in the using process, the distance between the two sets of rollers can be adjusted according to the actual diameter of the round workpiece needing to be welded, so that it is guaranteed that enough supporting force is provided for the round workpiece, and an operator can effectively control balance and rotation of the workpiece.

Description

Technical Field

[0001] The utility model relates to the technical field of welding auxiliary devices, in particular to an auxiliary turning device for welding circular workpieces. Background Art

[0002] When welding a larger circular workpiece, it is difficult to flip it due to its large size. During welding, a flipping device is needed to assist in flipping the circular workpiece to assist in completing the welding work.

[0003] Existing auxiliary turning devices are usually designed to support circular workpieces within a specific diameter and length range. If the diameter of the circular workpiece is too small or too large, exceeding the support range of the device design, the support may be unstable, thus affecting the quality and safety of subsequent welding work. Especially when processing long circular workpieces, existing turning devices may not provide sufficient support and stability, which will make it impossible for operators to effectively control the balance and rotation of the workpiece, thereby limiting the applicability and reliability of these devices in practical applications. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides an auxiliary turning device for welding circular workpieces.

[0005] The technical solution of the utility model is as follows:

[0006] An auxiliary turning device for welding a circular workpiece comprises a plurality of groups of bases, each group of the bases comprises a top plate, two groups of support plates and a bottom plate, the two groups of support plates are respectively fixedly connected to the front and rear sides between the lower surface of the top plate and the upper surface of the bottom plate, and each two groups of the bases are connected by two groups of connecting brackets with adjustable lengths, the upper surface of the top plate is slidably connected with two groups of movable plates distributed front and back, the upper surface of the movable plate is fixedly connected with vertical plates on both sides, the upper surface of the vertical plates is provided with an arc groove, the upper surface of the vertical plates and located above the arc groove are fixedly connected with a semicircular fixing buckle by bolts, and the arc groove is fixed to the inside of the semicircular fixing buckle A shaft rod is connected, and a roller is rotatably connected to the outer side of the shaft rod through a bearing, and a nut seat is detachably connected to the lower surface of the movable plate, and a double-threaded screw rod is internally threadedly connected to the nut seat, and the double-threaded screw rod is rotatably connected to the inside of the two groups of support plates, and the front end of the double-threaded screw rod penetrates the support plate located on the front side and is fixedly connected to a fixing rod 1, and the front end of the fixing rod 1 is fixedly connected to a T-shaped handle, and the rear end of the double-threaded screw rod penetrates the support plate located on the rear side and is fixedly connected to a fixing rod 2, and the rear end of the fixing rod 2 is fixedly connected to a limiting toothed disk, and a limiting member for limiting the rotation of the limiting toothed disk is connected to the rear side of the upper surface of the top plate.

[0007] Optionally, two groups of C-shaped seats are fixedly connected to the left and right sides of the lower surface of the top plate, the lower surface of the C-shaped seat is fixedly connected to the upper surface of the bottom plate, the side of the C-shaped seat away from the opening is fixedly connected to an I-shaped connecting seat, the connecting bracket is composed of two groups of hollow I-shaped tubes and a solid I-shaped tube, the hollow I-shaped tubes are fixedly connected to the outside of the I-shaped connecting seat by bolts, the two groups of hollow I-shaped tubes are respectively slidably connected to the outside of both ends of the solid I-shaped tube, a limiting hole is penetrated on the upper surface of one end of the hollow I-shaped tube away from the I-shaped connecting seat, the internal thread of the limiting hole is connected to a locking bolt, the end of the locking bolt penetrates the limiting hole and abuts against the upper surface of the solid I-shaped tube.

[0008] Optionally, two groups of L-shaped plates installed back to back are fixedly connected to the front and rear sides of the lower surface of the movable plate, and a connecting rod is fixedly connected to the upper surface of the nut seat. The connecting rod is fixedly connected between the two groups of L-shaped plates by bolts, and a through groove is opened in the middle position of the upper surface of the top plate, and the connecting rod is slidably connected to the inside of the through groove.

[0009] Optionally, four groups of square plates are fixedly connected to the lower surface of the movable plate, and vertical rods are fixedly connected to the left and right sides of the lower surface of each group of the square plates. A pulley is rotatably connected between the two groups of vertical rods through a connecting shaft, and sliding grooves are opened on the left and right sides of the upper surface of the top plate, and the pulley is slidably connected to the inside of the sliding groove on the corresponding side.

[0010] Optionally, the side of the vertical plate away from the roller is fixedly connected with an arc seat, the inner wall of the arc seat is equidistantly provided with three groups of limit grooves, the outer sides of both ends of the shaft rod are fixedly connected with limit rings, the outer sides of the limit rings are fixedly connected with three groups of limit blocks, and the limit blocks are inserted into the limit grooves at corresponding positions.

[0011] Optionally, a pull ring is fixedly connected to the upper surface of the semicircular fixing buckle.

[0012] Optionally, a plurality of rubber bumps are bonded to the outer side of the roller at equal intervals.

[0013] Optionally, the limiting member includes a fixing plate, which is fixedly connected to the rear side of the upper surface of the top plate, a fixing ear is fixedly connected to the rear side of the fixing plate, a threaded adjustment rod is internally threadedly connected to the fixing ear, a limiting block for limiting the rotation of the limiting gear disk is fixedly connected to the lower surface of the threaded adjustment rod, a guide rail is fixedly connected to the lower surface of the fixing ear, a guide block is fixedly connected to the side of the limit block close to the guide rail, and the guide block is slidably connected to the inside of the guide rail.

[0014] All the above optional technical solutions can be combined arbitrarily, and the present utility model does not provide detailed descriptions of the structures after the combinations.

[0015] By means of the above scheme, the beneficial effects of the utility model are as follows:

[0016] 1. The utility model provides multiple groups of independent bases and connecting brackets for connecting the bases. When in use, the appropriate number of bases can be installed according to the actual length of the circular workpiece to be welded, and connected through the connecting brackets to ensure that they are stable and reliable when used in combination. The design of the connecting bracket enables it to support circular workpieces of different lengths, thereby meeting the corresponding welding requirements, providing sufficient support and stability for it, so that the operator can effectively control the balance and rotation of the workpiece. At the same time, since the base adopts a grouped independent structure, it will not take up too much storage space when idle.

[0017] 2. When in use, the distance between the two sets of rollers can be adjusted according to the actual diameter of the circular workpiece to be welded. The double-thread screw is driven to make the two sets of rollers rotate in opposite directions, so as to achieve the effect of getting closer to each other or moving away from each other. The adjustment process is simple and convenient. Secondly, the double-thread screw after position adjustment is fixed by the limit tooth disc and the limit piece. In this way, the adjusted position is effectively fixed and maintained, which can ensure the stability and reliability of supporting the circular workpiece.

[0018] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the overall appearance structure of the auxiliary turning device for welding a circular workpiece provided by the utility model at one viewing angle;

[0020] Figure 2 A schematic diagram of the structure of the auxiliary turning device for welding a circular workpiece provided by the utility model from another perspective;

[0021] Figure 3 It is a schematic diagram of the exploded structure of the connecting bracket in the utility model;

[0022] Figure 4 It is a right side view of the base and surrounding components in the utility model;

[0023] Figure 5 It is a schematic diagram of the exploded structure of some parts in the utility model;

[0024] Figure 6 for Figure 5 A schematic diagram of the enlarged structure at A in the middle;

[0025] Figure 7It is a schematic diagram of the structure in which the movable plate, the nut seat and the double-thread screw rod cooperate in the utility model;

[0026] Figure 8 It is a schematic diagram of the structure in which the movable plate, the vertical plate and the shaft rod cooperate with each other in the utility model.

[0027] Numbers in the figure: 1, base; 11, top plate; 111, through groove; 112, slide groove; 12, support plate; 13, bottom plate; 14, C-shaped seat; 141, I-shaped connecting seat; 2, connecting bracket; 21, hollow I-shaped tube; 211, limit hole; 212, locking bolt; 22, solid I-shaped tube; 3, movable plate; 31, L-shaped plate; 32, square plate; 33, vertical rod; 34, pulley; 4, vertical plate; 41, arc groove; 42, arc seat; 421, Limiting groove; 43, semicircular fixing buckle; 431, pull ring; 5, shaft; 51, roller; 52, rubber bump; 53, limiting ring; 531, limiting block; 6, nut seat; 61, connecting rod; 7, double-thread screw rod; 71, fixing rod one; 72, T-shaped handle; 73, fixing rod two; 74, limiting toothed disc; 8, limiting piece; 81, fixing plate; 82, fixing ear; 821, guide rail; 83, threaded adjustment rod; 84, limiting block; 841, guide block. DETAILED DESCRIPTION

[0028] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0029] See also Figure 1-8The utility model provides an auxiliary turning device for welding a circular workpiece, comprising a plurality of bases 1, each of which is composed of a top plate 11, two groups of support plates 12 and a bottom plate 13, the two groups of support plates 12 are respectively fixedly connected to the front and rear sides between the lower surface of the top plate 11 and the upper surface of the bottom plate 13, and each two groups of bases 1 are connected by two groups of connecting brackets 2 with adjustable lengths, the upper surface of the top plate 11 is slidably connected with two groups of movable plates 3 distributed front and back, the upper surface of the movable plate 3 is fixedly connected with vertical plates 4 on both sides, the upper surface of the vertical plates 4 is provided with an arc groove 41, the upper surface of the vertical plates 4 and located above the arc groove 41 is fixedly connected with a semicircular fixing buckle 43 by bolts, the arc groove 41 and the semicircular fixing buckle 43 are fixedly connected The buckle 43 is fixedly connected to the shaft rod 5 inside, and the outer side of the shaft rod 5 is rotatably connected to the roller 51 through a bearing. The lower surface of the movable plate 3 is detachably connected to the nut seat 6, and the internal thread of the nut seat 6 is connected to the double-threaded screw rod 7. The double-threaded screw rod 7 is rotatably connected to the inside of the two groups of support plates 12. The front end of the double-threaded screw rod 7 penetrates the support plate 12 located on the front side and is fixedly connected to a fixing rod 1 71. The front end of the fixing rod 1 71 is fixedly connected to a T-shaped handle 72. The rear end of the double-threaded screw rod 7 penetrates the support plate 12 located on the rear side and is fixedly connected to a fixing rod 2 73. The rear end of the fixing rod 2 73 is fixedly connected to a limiting toothed disc 74. The rear side of the upper surface of the top plate 11 is connected to a limiting member 8 for limiting the rotation of the limiting toothed disc 74.

[0030] First, the turning device is designed as a plurality of independent bases 1 in the utility model. When in use, a suitable number of bases 1 can be installed according to the needs, and connected through the connecting bracket 2 to ensure that the connected bases 1 are on the same horizontal line. The advantage of this is that it does not take up too much placement space when idle, and when in use, a suitable number of bases 1 can be installed according to the actual length of the circular workpiece to be welded, thereby enhancing the applicability and flexibility of the device.

[0031] Secondly, the utility model also designs the spacing between the two sets of rollers 51 for supporting the circular workpiece to be adjustable. The operator can adjust the spacing between the two sets of rollers 51 in real time according to the diameter of the circular workpiece to be welded, ensuring that the spacing can provide a sufficiently stable supporting space for the circular workpiece.

[0032] Finally, when the operator adjusts the distance between the two groups of rollers 51, he needs to operate the T-shaped handle 72 to rotate the double-threaded screw 7. When the double-threaded screw 7 rotates, the two groups of nut seats 6 located on the outside of the double-threaded screw 7 will indirectly drive the two groups of rollers 51 to move closer to or away from each other according to the direction of the double-threaded screw 7. In the adjustment process, the double-threaded screw 7 will drive the limit toothed disc 74 to rotate synchronously through the fixing rod 2 73. After the distance between the two groups of rollers 51 is adjusted, the limit toothed disc 74 is fixed by the limit member 8, thereby achieving the purpose of locking the position of the double-threaded screw 7, thereby providing a sufficiently stable support force for the circular workpiece.

[0033] Furthermore, two groups of C-shaped seats 14 are fixedly connected to the left and right sides of the lower surface of the top plate 11, the lower surface of the C-shaped seat 14 is fixedly connected to the upper surface of the bottom plate 13, and the side of the C-shaped seat 14 away from the opening is fixedly connected to the I-shaped connecting seat 141, and the connecting bracket 2 is composed of two groups of hollow I-shaped tubes 21 and a solid I-shaped tube 22. The hollow I-shaped tube 21 is fixedly connected to the outside of the I-shaped connecting seat 141 by bolts, and the two groups of hollow I-shaped tubes 21 are respectively slidably connected to the outside of both ends of the solid I-shaped tube 22, and a limiting hole 211 is penetrated on the upper surface of one end of the hollow I-shaped tube 21 away from the I-shaped connecting seat 141, and the internal thread of the limiting hole 211 is connected to a locking bolt 212, and the end of the locking bolt 212 penetrates the limiting hole 211 and abuts against the upper surface of the solid I-shaped tube 22.

[0034] When the connecting bracket 2 is used to connect two groups of bases 1, the two groups of hollow I-shaped tubes 21 can be respectively connected to the I-shaped connecting seats 141 of the two groups of bases 1 using bolts to ensure that the two groups of bases 1 are on the same horizontal line. The overall length of a single group of connecting brackets 2 is adjustable, and the distance between the two groups of bases 1 is indirectly adjusted by changing the relative positions of the two groups of hollow I-shaped tubes 21 and the solid I-shaped tubes 22, ensuring that the connecting bracket 2 can effectively connect the two groups of bases 1.

[0035] Furthermore, two groups of L-shaped plates 31 installed back to back are fixedly connected to the front and rear sides of the lower surface of the movable plate 3, and a connecting rod 61 is fixedly connected to the upper surface of the nut seat 6. The connecting rod 61 is fixedly connected between the two groups of L-shaped plates 31 by bolts. A through groove 111 is opened in the middle position of the upper surface of the top plate 11, and the connecting rod 61 is slidably connected inside the through groove 111.

[0036] The movable plate 3 and the nut seat 6 are detachable, which is convenient for subsequent maintenance and replacement. During installation, only the connecting rod 61 needs to be inserted into the inner side of the two sets of L-shaped plates 31, and then fixed with bolts, which is simple and convenient to operate.

[0037] Furthermore, four groups of square plates 32 are fixedly connected to the lower surface of the movable plate 3, and vertical rods 33 are fixedly connected to the left and right sides of the lower surface of each group of square plates 32. A pulley 34 is rotatably connected between the two groups of vertical rods 33 through a connecting shaft. Slide grooves 112 are opened on the left and right sides of the upper surface of the top plate 11, and the pulley 34 is slidably connected to the inside of the slide groove 112 on the corresponding side.

[0038] When the movable plate 3 slides relatively on the upper surface of the top plate 11, the pulley 34 inside it will be driven to slide inside the slide groove 112 through the two sets of vertical rods 33. The slide groove 112 provides a sliding path for the pulley 34, which plays a role of limiting and guiding. At the same time, the movable plate 3 and the parts connected above it and the circular workpiece to be welded are all supported by the four sets of pulleys 34 connected to the lower surface of the movable plate 3. This support structure can effectively reduce the direct contact between the movable plate 3 and the top plate 11, thereby avoiding the generation of friction, making the movement smoother, and the operator can easily adjust the position of the movable plate 3.

[0039] Furthermore, an arc-shaped seat 42 is fixedly connected to the side of the vertical plate 4 away from the roller 51, and three groups of limit grooves 421 are equidistantly provided on the inner wall of the arc-shaped seat 42. Limit rings 53 are fixedly connected to the outer sides of both ends of the shaft rod 5, and three groups of limit blocks 531 are fixedly connected to the outer sides of the limit rings 53. The limit blocks 531 are inserted into the limit grooves 421 at corresponding positions.

[0040] When installing the roller 51, the shaft rod 5 needs to be placed inside the arc groove 41. At this time, the limiting ring 53 will be placed inside the arc seat 42 on the corresponding side, and the three groups of limiting blocks 531 on the outside of the limiting ring 53 will cooperate with the three groups of limiting grooves 421 on the inside of the arc seat 42, thereby playing a limiting role and ensuring that the shaft rod 5 will not rotate relative to the arc groove 41.

[0041] Furthermore, a pull ring 431 is fixedly connected to the upper surface of the semicircular fixing buckle 43 .

[0042] When the roller 51 needs to be disassembled, the operator only needs to remove the semicircular fixing buckle 43 for limiting the position of the shaft rod 5. The setting of the pull ring 431 makes it easier for the operator to disassemble and install the semicircular fixing buckle 43, thereby facilitating the maintenance and replacement of the entire roller 51.

[0043] Furthermore, a plurality of rubber protrusions 52 are bonded to the outer side of the roller 51 at equal intervals.

[0044] The rubber bumps 52 are provided to increase the friction between the surface of the roller 51 and the circular workpiece. Since the rubber bumps 52 have good grip and anti-skid properties, when the circular workpiece contacts the roller 51 with the rubber bumps 52, the friction coefficient between the two can be effectively increased. This increased friction ensures that when the operator manipulates the rotating circular workpiece, the workpiece will not slip, allowing the operator to manipulate the circular workpiece more stably.

[0045] Furthermore, the limiting member 8 includes a fixing plate 81, which is fixedly connected to the rear side of the upper surface of the top plate 11, and a fixing ear 82 is fixedly connected to the rear side of the fixing plate 81, and a threaded adjustment rod 83 is internally threadedly connected to the fixing ear 82, and a limiting block 84 for limiting the rotation of the limiting gear plate 74 is fixedly connected to the lower surface of the threaded adjustment rod 83, and a guide rail 821 is fixedly connected to the lower surface of the fixing ear 82, and a guide block 841 is fixedly connected to the side of the limiting block 84 close to the guide rail 821, and the guide block 841 is slidably connected to the inside of the guide rail 821.

[0046] When the position of the double-thread screw 7 needs to be fixed and locked, the threaded adjustment rod 83 only needs to be manually rotated to drive the limit block 84 to move downward until the limit block 84 is embedded between the two sets of teeth of the limit toothed disc 74, thereby achieving the purpose of limiting the rotation of the limit toothed disc 74. The operation is simple and the locking function can be achieved by manually rotating the threaded adjustment rod 83.

[0047] Working principle: The first step is to install a suitable number of bases 1 according to the circular workpieces to be welded, and connect them through the connecting bracket 2. First, fix a group of hollow I-shaped tubes 21 to the outside of the I-shaped connecting seat 141 of one group of bases 1 by bolts, and then fix another group of hollow I-shaped tubes 21 to the outside of the I-shaped connecting seat 141 of another group of bases 1. Then adjust the relative positions of the two groups of hollow I-shaped tubes 21 and the solid I-shaped tubes 22 between them according to the needs. After the adjustment is completed, fix them with the locking bolts 212. The second step is to adjust the spacing between the two groups of rollers 51 according to the circular workpieces to be welded, manually rotate the T-shaped handle 72, and the T-shaped handle 72 drives the double-threaded screw 7 to rotate. At this time, the two groups of nut seats 6 on the outside can move closer to or away from each other according to the rotation direction of the double-threaded screw 7. At the same time, the nut seat 6 drives the roller 51 above the movable plate 3 to move through the connecting rod 61, thereby achieving the purpose of adjusting the spacing between the two groups of rollers 51. In the third step, after the spacing between the two groups of rollers 51 is adjusted, the threaded adjustment rod 83 is manually rotated to drive the limit block 84 to move downward, thereby fixing the position of the limit toothed disc 74, ensuring that the positions of the two groups of rollers 51 are in a fixed state, and providing a sufficiently stable supporting force for the circular workpiece to be welded. This completes the method of using the device.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. An auxiliary turning device for welding a circular workpiece, characterized in that: The invention comprises a plurality of groups of bases (1), each group of the bases (1) comprises a top plate (11), two groups of support plates (12) and a bottom plate (13), the two groups of support plates (12) being respectively fixedly connected to the front and rear sides between the lower surface of the top plate (11) and the upper surface of the bottom plate (13), and each two groups of the bases (1) being connected via two groups of connection brackets (2) of adjustable length, the upper surface of the top plate (11) being slidably connected with two groups of movable plates (3) distributed front and back, the upper surface of the movable plates (3) being fixedly connected with vertical plates (4) on both left and right sides, the upper surface of the vertical plates (4) being provided with an arc groove (41), the upper surface of the vertical plates (4) being fixedly connected with a semicircular fixing buckle (43) located above the arc groove (41) by bolts, the arc groove (41) and the interior of the semicircular fixing buckle (43) being fixedly connected with a shaft rod (5), and the The outer side of the shaft rod (5) is rotatably connected to a roller (51) via a bearing, the lower surface of the movable plate (3) is detachably connected to a nut seat (6), the internal thread of the nut seat (6) is connected to a double-threaded screw rod (7), the double-threaded screw rod (7) is rotatably connected to the inside of the two groups of support plates (12), the front end of the double-threaded screw rod (7) passes through the support plate (12) located on the front side and is fixedly connected to a fixing rod 1 (71), the front end of the fixing rod 1 (71) is fixedly connected to a T-shaped handle (72), the rear end of the double-threaded screw rod (7) passes through the support plate (12) located on the rear side and is fixedly connected to a fixing rod 2 (73), the rear end of the fixing rod 2 (73) is fixedly connected to a limiting toothed disc (74), and the rear side of the upper surface of the top plate (11) is connected to a limiting member (8) for limiting the rotation of the limiting toothed disc (74).

2. The auxiliary turning device for welding a circular workpiece according to claim 1, characterized in that: Two groups of C-shaped seats (14) are fixedly connected to the left and right sides of the lower surface of the top plate (11); the lower surface of the C-shaped seat (14) is fixedly connected to the upper surface of the bottom plate (13); the side of the C-shaped seat (14) away from the opening is fixedly connected to an I-shaped connecting seat (141); the connecting bracket (2) is composed of two groups of hollow I-shaped tubes (21) and a solid I-shaped tube (22); the hollow I-shaped tube (21) is fixedly connected to the I-shaped connecting seat (141) by bolts. 41), the two groups of hollow I-shaped tubes (21) are respectively slidably connected to the outer sides of the two ends of the solid I-shaped tube (22), and a limiting hole (211) is penetrated through the upper surface of one end of the hollow I-shaped tube (21) away from the I-shaped connecting seat (141), and a locking bolt (212) is connected to the internal thread of the limiting hole (211), and the end of the locking bolt (212) penetrates the limiting hole (211) and abuts against the upper surface of the solid I-shaped tube (22).

3. The auxiliary turning device for welding a circular workpiece according to claim 1, characterized in that: Two groups of L-shaped plates (31) installed in a back-to-back manner are fixedly connected to the front and rear sides of the lower surface of the movable plate (3); a connecting rod (61) is fixedly connected to the upper surface of the nut seat (6); the connecting rod (61) is fixedly connected between the two groups of L-shaped plates (31) by bolts; a through groove (111) is penetrated through the middle position of the upper surface of the top plate (11); the connecting rod (61) is slidably connected inside the through groove (111).

4. The auxiliary turning device for welding a circular workpiece according to claim 1, characterized in that: Four groups of square plates (32) are fixedly connected to the lower surface of the movable plate (3), and vertical rods (33) are fixedly connected to the lower surface of each group of square plates (32) on both sides. A pulley (34) is rotatably connected between the two groups of vertical rods (33) via a connecting shaft. Slide grooves (112) are provided on both sides of the upper surface of the top plate (11), and the pulley (34) is slidably connected inside the slide groove (112) on the corresponding side.

5. The auxiliary turning device for welding a circular workpiece according to claim 1, characterized in that: The side of the vertical plate (4) away from the roller (51) is fixedly connected to an arc seat (42), and the inner side wall of the arc seat (42) is equidistantly provided with three groups of limit grooves (421). The outer sides of both ends of the shaft rod (5) are fixedly connected to limit rings (53), and the outer sides of the limit rings (53) are fixedly connected to three groups of limit blocks (531), and the limit blocks (531) are inserted into the limit grooves (421) at corresponding positions.

6. The auxiliary turning device for welding a circular workpiece according to claim 1, characterized in that: A pull ring (431) is fixedly connected to the upper surface of the semicircular fixing buckle (43).

7. The auxiliary turning device for welding a circular workpiece according to claim 1, characterized in that: A plurality of rubber protrusions (52) are bonded to the outer side of the roller (51) at equal intervals.

8. The auxiliary turning device for welding a circular workpiece according to claim 1, characterized in that: The limiting member (8) comprises a fixing plate (81), wherein the fixing plate (81) is fixedly connected to the rear side of the upper surface of the top plate (11), a fixing ear (82) is fixedly connected to the rear side of the fixing plate (81), a threaded adjustment rod (83) is internally threadedly connected to the fixing ear (82), a limiting clamping block (84) for limiting the rotation of the limiting toothed disc (74) is fixedly connected to the lower surface of the threaded adjustment rod (83), a guide rail (821) is fixedly connected to the lower surface of the fixing ear (82), a guide block (841) is fixedly connected to the side of the limiting clamping block (84) close to the guide rail (821), and the guide block (841) is slidably connected to the inside of the guide rail (821).

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