Auxiliary pressing device for steel plate welding machine

Abstract

The application discloses a steel plate welding machine auxiliary pressing device and particularly relates to the technical field of welding, which comprises an inner-outer synchronous pressing mechanism, wherein the inner-outer synchronous pressing mechanism comprises an outer shaft, a plurality of outer pressing strips, a plurality of outer pressing strips, an outer pressing strip, an outer arc pressing strip, an outer end pressing strip and an inner shaft, all of which are fixedly connected to the outer wall of the outer shaft, the top end of each outer pressing strip is fixedly connected with an outer pressing strip, and the top end of each outer pressing strip is fixedly connected with an outer arc pressing strip; the outer end pressing strip is fixedly connected to the top end of the outer arc pressing strip, and one side of the outer shaft is provided with the inner shaft. The inner-outer synchronous pressing mechanism is used for synchronously pressing the inner wall of arc-shaped steel plates of different sizes, so that the arc-shaped steel plates of different sizes are accurately positioned and uniformly stressed during welding, the welding efficiency is improved, and the welding accuracy is remarkably improved, thereby solving the problems that arc-shaped steel plates of various sizes have low welding efficiency and poor welding accuracy.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and more specifically, to an auxiliary clamping device for steel plate welding machines. Background Technology

[0002] The auxiliary clamping device of the steel plate welding machine is an indispensable auxiliary equipment in the welding process. Its core function is to apply stable pressure to the steel plate mechanically to ensure that the steel plate maintains a precise position and close fit during the welding process. In the welding of long welds, the clamping device can simulate the effect of a "rigid clamp" to prevent the steel plate from shifting due to gravity or welding stress, thus realizing the welding operation.

[0003] Among existing published documents, patent publication number CN216633205U discloses a clamping device for steel plate welding. This technology uses movable rods fixed at both ends of the top of each mounting beam. These movable rods pass through the welding platform and are slidably connected to it. The tops of the movable rods extend above the welding platform, and a clamping plate for clamping the steel plate is detachably connected between the tops of two symmetrically arranged movable rods. This allows for clamping and fixing of the steel plate during welding, preventing displacement and bending deformation, and improving product quality. However, this technology still has the following problems.

[0004] During the welding process of steel plates, a clamping device is needed for positioning and fixing. However, when butt welding multiple curved steel plates of different sizes, the external and internal curves of these plates, as well as the fact that each weld seam is a curved welding position, make it difficult to clamp the plates with consistent force both internally and externally. This easily leads to misalignment at the weld seam, resulting in low welding efficiency and poor welding precision. Summary of the Invention

[0005] To overcome the aforementioned deficiencies of the prior art, the present invention provides the following technical solution: an auxiliary clamping device for a steel plate welding machine, comprising a positioning groove plate, an outer shaft above the positioning groove plate, and an inner and outer synchronous clamping mechanism on the outer wall of the outer shaft, the inner and outer synchronous clamping mechanism comprising:

[0006] Multiple outer pressure strips are fixedly connected to the outer wall of the outer shaft. Each outer pressure strip has an outer tightening strip fixedly connected to its top end, and each outer tightening strip has an outer arc pressure strip fixedly connected to its top end.

[0007] An outer end pressure strip is fixedly connected to the top of the outer arc pressure strip, and an inner shaft is provided on one side of the outer shaft;

[0008] Multiple inner pressure strips are fixedly connected to the outer wall of the inner shaft, and an inner arc strip is fixedly connected to the top of each inner pressure strip;

[0009] An inner moving strip is fixedly located at the top of the inner arc strip. An inner end strip is fixedly installed at the top of the inner moving strip. A driving force assembly is provided on the outside of the outer pressure strip and near one end of it. The driving force assembly is used to drive the outer shaft and drive the inner shaft to rotate.

[0010] In a preferred embodiment, the inner arc diameter of the outer arc pressure strip is larger than the inner arc diameter of the outer tight strip;

[0011] The inner wall arc diameter of the outer tightening strip is larger than the inner wall arc diameter of the outer pressure strip, and the inner wall arc diameter of the outer pressure strip is larger than the inner wall arc diameter of the outer end pressure strip.

[0012] In a preferred embodiment, the inner wall arc diameter of the inner moving strip is larger than the inner wall arc diameter of the inner arc strip;

[0013] The inner arc diameter of the inner arc strip is larger than that of the inner pressure strip, and the inner arc diameter of the inner pressure strip is larger than that of the inner end strip.

[0014] In a preferred embodiment, the driving force assembly includes:

[0015] Two hinge sleeves, one hinge sleeve is fixedly connected to the outer wall of the outer shaft and near one end thereof, and the other hinge sleeve is fixedly connected to the outer wall of the inner shaft and near one end thereof. A linkage shaft is fixedly connected to one side of the inner wall of each hinge sleeve.

[0016] A sleeve is rotatably mounted on the outer wall of the linkage shaft, and a pull rod is rotatably connected to the inner wall of the sleeve at a position away from the linkage shaft;

[0017] A groove block is installed at one end of a pull rod, and both pull rods are fixedly connected to the groove block. A tension sensor is fixedly installed on the lower surface of the groove block.

[0018] An electric cylinder is installed at the bottom of the tension sensor. The outer wall of the electric cylinder is fixedly connected to the positioning groove plate. The retraction end of the electric cylinder is fixedly connected to the sensing end of the tension sensor. A controller is fixedly connected to one side of the positioning groove plate near its corner.

[0019] In a preferred embodiment, both the electric cylinder and the tension sensor are electrically connected to the controller, with the sensing end of the tension sensor facing downwards.

[0020] In a preferred embodiment, a transverse end synchronous pressing assembly is provided on one side of the outer arc pressure strip, the transverse end synchronous pressing assembly comprising:

[0021] The upper horizontal frame is fixedly connected to one side of the outer arc pressure strip, and the middle horizontal frame is fixedly connected to one side of the outer tight strip;

[0022] The lower horizontal bar is fixedly connected to one side of the outer pressure bar, and the upper horizontal frame, middle horizontal frame and lower horizontal bar are arranged in a curved path;

[0023] A connecting block is fixedly connected to the other side of the outer arc pressure strip. A curved end strip is fixedly installed at the bottom end of the connecting block, and multiple welding holes are opened on the inner wall of the curved end strip.

[0024] In a preferred embodiment, the bottom of the inner wall of the curved end strip is rounded, and the plurality of weld holes are arranged in a curved path.

[0025] In a preferred embodiment, a curved outer sleeve plate is fixedly connected to the upper surface of the positioning groove plate near its central position. The inner wall of the curved outer sleeve plate is rotatably connected to the outer wall of the outer shaft, and the bottom end of the curved outer sleeve plate is fixedly connected to the positioning groove plate.

[0026] A bracket is fixedly connected to one end of the positioning groove plate, a curved plate is fixedly installed at the top of the bracket, and multiple support columns are fixedly connected to one side of the curved plate.

[0027] In a preferred embodiment, a curved inner sleeve plate is installed in the middle of the outer wall of the inner shaft, the curved inner sleeve plate is rotatably connected to the outer wall of the inner shaft, and the positioning groove plate is fixedly connected to the bottom end of the curved inner sleeve plate.

[0028] The technical effects and advantages of this invention are as follows:

[0029] 1. This invention utilizes an internal and external synchronous pressing mechanism. The outer shaft drives the outer pressure bar to rotate counterclockwise, causing the outer tightening bar, outer arc pressure bar, and outer end pressure bar to rotate synchronously counterclockwise. By leveraging the differences in the inner wall arc diameters of each component (outer arc pressure bar > outer tightening bar > outer pressure bar > outer end pressure bar), synchronous vertical pressing and positioning of the outer walls of various sizes of curved steel plates is achieved. Simultaneously, the inner shaft drives the inner pressure bar to rotate counterclockwise, causing the inner arc bar, inner moving bar, and inner end bar to rotate synchronously clockwise. The differences in the inner wall arc diameters of each component (inner moving bar > inner arc bar > inner pressure bar > inner end bar) ensure synchronous pressing of the inner walls of curved steel plates of different sizes. This internal and external coordinated constant force pressing and positioning structure ensures precise positioning and uniform force distribution of curved steel plates of different sizes during welding, not only improving welding efficiency but also significantly enhancing welding accuracy.

[0030] 2. This invention employs a driving force-fixed component. The electric cylinder drives the sensing end of the tension sensor to move downward, which in turn drives the groove block and two pull rods to move downward synchronously. The pull rods cause the bottom end of the sleeve shaft to move downward, causing the two linkage shafts to rotate counterclockwise and clockwise respectively. The linkage shafts drive the hinge sleeve to rotate. One hinge sleeve drives the outer shaft to rotate counterclockwise with a fixed force, and the other drives the inner shaft to rotate clockwise with a fixed force. The fixed force is the torque pressure converted from the tension. This driving method, through precise mechanical linkage of the fixed force, enables the outer and inner shafts to apply a fixed force synchronously and accurately. It can adapt to the synchronous fixed force pressing of various sizes of curved steel plates, effectively ensuring the positioning stability of curved steel plates of different sizes during welding. This not only improves welding efficiency but also significantly enhances welding accuracy.

[0031] 3. This invention utilizes a synchronous pressing assembly at the transverse ends. The outer arc pressing strip drives the upper transverse frame, the outer tightening strip drives the middle transverse frame, and the outer pressing strip drives the lower transverse strip to rotate counterclockwise. All three components simultaneously press and position the outer wall of the transverse edge of the weld seam of various sizes of arc-shaped steel plates according to a specified pressure. At the same time, the outer arc pressing strip drives the connecting block to rotate the curved end strip counterclockwise. The curved end strip synchronously positions and presses the right end face of various sizes of arc-shaped steel plates. Multiple weld holes leave a large space for the weld seam, making the positioning more efficient and accurate when welding arc-shaped steel plates of different sizes, effectively improving welding efficiency and accuracy. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the auxiliary pressing device for the steel plate welding machine of the present invention.

[0033] Figure 2 This is a schematic diagram of the vertical cross-section of the auxiliary pressing device for the steel plate welding machine of the present invention.

[0034] Figure 3 This is a schematic diagram of a partial cut-off structure at the connection between the outer shaft and the hinge sleeve of the present invention.

[0035] Figure 4 This is a top view of a partial structural diagram of the connection between the tie rod and the groove block of the present invention.

[0036] Figure 5 This is a schematic diagram of the main structure of the transverse end synchronous pressing assembly of the present invention.

[0037] Figure 6 This is a side view of the transverse end synchronous pressing assembly of the present invention.

[0038] Figure 7 This is a partial structural diagram of the connection between the bracket and the positioning groove plate of the present invention.

[0039] Figure 8 This is a bottom view schematic diagram of the auxiliary pressing device for the steel plate welding machine of the present invention.

[0040] The attached diagram is labeled as follows: 1. Positioning groove plate; 2. Outer pressure strip; 3. Outer tightening strip; 4. Outer arc pressure strip; 5. Outer end pressure strip; 6. Inner shaft; 7. Inner pressure strip; 8. Inner arc strip; 9. Inner moving strip; 10. Inner end strip; 11. Hinge sleeve; 12. Linkage shaft; 13. Sleeve shaft; 14. Pull rod; 15. Pull groove block; 16. Tension sensor; 17. Electric cylinder; 18. Upper horizontal frame; 19. Middle horizontal frame; 20. Lower horizontal strip; 21. Connecting block; 22. Curved end strip; 23. Weld hole; 24. Outer shaft; 25. Curved outer sleeve plate; 26. Controller; 27. Bracket; 28. Curved plate; 29. ​​Support column; 30. Curved inner sleeve plate. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] like Figure 1 - Figure 8 The diagram illustrates an auxiliary clamping device for a steel plate welding machine. This device includes an internal and external synchronous clamping mechanism, a driving force-fixing component, and a transverse end synchronous clamping component. The arrangement of these mechanisms and components enables synchronous vertical clamping and positioning of the outer walls of curved steel plates of various sizes, as well as synchronous clamping of the inner walls of curved steel plates of different sizes. This internal and external coordinated force-fixing and positioning structure ensures precise positioning and uniform force distribution of curved steel plates of different sizes during welding, thereby improving welding efficiency and significantly enhancing welding accuracy. The specific structural settings of each mechanism and component are as follows.

[0043] In this embodiment, as Figure 1 - Figure 2As shown, the internal and external synchronous pressing mechanism includes: multiple outer pressure bars 2, all fixedly connected to the outer wall of the outer shaft 24, with an outer clamping bar 3 fixedly connected to the top of each outer pressure bar 2, and an outer arc pressure bar 4 fixedly connected to the top of each outer clamping bar 3; an outer end pressure bar 5, fixedly connected to the top of the outer arc pressure bar 4; an inner shaft 6 is provided on one side of the outer shaft 24; multiple inner pressure bars 7, all fixedly connected to the outer wall of the inner shaft 6, with an inner arc bar 8 fixedly connected to the top of each inner pressure bar 7; an inner moving bar 9, fixedly located at the top of the inner arc bar 8, with an inner end bar 10 fixedly installed at the top of the inner moving bar 9; and a driving force assembly is provided on the outside of the outer pressure bar 2 and near one end of it, the driving force assembly being used to drive the outer shaft 24 and drive the inner shaft 6 to rotate with constant force. The inner arc diameter of the outer arc pressure strip 4 is greater than that of the outer tight strip 3; the inner arc diameter of the outer tight strip 3 is greater than that of the outer pressure strip 2, and the inner arc diameter of the outer pressure strip 2 is greater than that of the outer end pressure strip 5. The inner arc diameter of the inner moving strip 9 is greater than that of the inner arc strip 8; the inner arc diameter of the inner arc strip 8 is greater than that of the inner pressure strip 7, and the inner arc diameter of the inner pressure strip 7 is greater than that of the inner end strip 10.

[0044] This allows the outer shaft 24 to drive the two outer pressure bars 2 to rotate counterclockwise, the outer pressure bars 2 to drive the outer tightening bars 3 to rotate counterclockwise, and the outer arc pressure bars 4 to drive the outer end pressure bars 5 to rotate counterclockwise. This ensures that the outer pressure bars 2, outer tightening bars 3, outer arc pressure bars 4, and outer end pressure bars 5 can all synchronously and vertically press and position the outer walls of various sizes of curved steel plates according to a specified pressure. Furthermore, the inner shaft 6 drives the inner pressure bars 7 to rotate clockwise, the inner arc bars 8 to drive the inner moving bars 9 to rotate clockwise, and the inner moving bars 9 to drive the inner end bars 10 to rotate clockwise. This ensures that the inner pressure bars 7, inner arc bars 8, inner moving bars 9, and inner end bars 10 can all synchronously and vertically press and position the inner walls of various sizes of curved steel plates according to a specified pressure. This synchronous welding positioning and pressing not only increases welding efficiency but also significantly improves welding accuracy.

[0045] In this embodiment, as Figure 3 - Figure 4As shown, the driving force assembly includes: two hinged sleeves 11, one hinged sleeve 11 is fixedly connected to the outer wall of the outer shaft 24 and near one end thereof, and the other hinged sleeve 11 is fixedly connected to the outer wall of the inner shaft 6 and near one end thereof. The two hinged sleeves 11 are arranged symmetrically and staggered. A linkage shaft 12 is fixedly connected to one side of the inner wall of each hinged sleeve 11; a sleeve shaft 13 is rotatably mounted on the outer wall of the linkage shaft 12, and a pull rod 14 is rotatably connected to the inner wall of the sleeve shaft 13 away from the linkage shaft 12; a groove block 15 is mounted on one end of the pull rod 14, and both pull rods 14 are fixedly connected to the groove block 15. A tension sensor 16 is fixedly mounted on the lower surface of the groove block 15; an electric cylinder 17 is mounted on the bottom end of the tension sensor 16, and the outer wall of the electric cylinder 17 is fixedly connected to the positioning groove plate 1. The retraction end of the electric cylinder 17 is fixedly connected to the sensing end of the tension sensor 16. A controller 26 is fixedly connected to one side of the positioning groove plate 1 and near its corner line. Two pull rods 14 are symmetrically offset about the center of the groove block 15, and each pull rod 14 has a circular vertical cross-section. The electric cylinder 17 and the force sensor 16 are both electrically connected to the controller 26, with the sensing end of the force sensor 16 facing downwards. This allows the electric cylinder 17 to move the sensing end of the force sensor 16 downwards, causing the groove block 15 to move the two pull rods 14 downwards synchronously. Simultaneously, the sleeve shaft 13 drives the linkage shaft 12 to rotate counterclockwise, and the other linkage shaft 12 rotates clockwise. This ensures that the hinge sleeve 11 drives the outer shaft 24 to rotate counterclockwise with constant force, while the other hinge sleeve 11 drives the inner shaft 6 to rotate clockwise with constant force. This provides precise tension, ensuring that the positioning and clamping operations are performed by converting the specified tension into torque pressure.

[0046] In this embodiment, as Figure 5 - Figure 6As shown, a transverse end synchronous clamping assembly is provided on one side of the outer arc pressure strip 4. The transverse end synchronous clamping assembly includes an upper horizontal frame 18, which is fixedly connected to one side of the outer arc pressure strip 4, and a middle horizontal frame 19, which is fixedly connected to one side of the outer pressure strip 3. A lower horizontal strip 20 is fixedly connected to one side of the outer pressure strip 2. The upper horizontal frame 18, the middle horizontal frame 19, and the lower horizontal strip 20 are arranged in a curved path. A connecting block 21 is fixedly connected to the other side of the outer arc pressure strip 4. A curved end strip 22 is fixedly installed at the bottom end of the connecting block 21. Multiple welding holes 23 are opened on the inner wall of the curved end strip 22. The bottom end of the inner wall of the curved end strip 22 is rounded, and the multiple welding holes 23 are arranged in a curved path. The outer arc pressure strip 4 rotates counterclockwise, causing the upper horizontal frame 18 to rotate counterclockwise. Simultaneously, the outer tightening strip 3 causes the middle horizontal frame 19 to rotate counterclockwise, and the outer pressure strip 2 causes the lower horizontal strip 20 to rotate counterclockwise. The upper horizontal frame 18, the middle horizontal frame 19, and the lower horizontal strip 20 can all synchronously press and position the outer wall of various sizes of curved steel plates according to a specified pressure at the transverse weld edge. The connecting block 21 drives the curved end strip 22 to rotate counterclockwise. The left side of the curved end strip 22 is pressed against the right end face of various sizes of curved steel plates for synchronous positioning and pressing. Multiple weld holes 23 can be located at the weld gap position of various sizes of curved steel plates. This enables synchronous constant force pressing and positioning of the right end face of various sizes of curved steel plates and the transverse weld edge of the outer wall of various sizes of curved steel plates. This not only improves the positioning and welding efficiency but also increases the accuracy of the welding force.

[0047] In this embodiment, as Figure 1 - Figure 7 As shown, a curved outer sleeve plate 25 is fixedly connected to the upper surface of the positioning groove plate 1 near its central position. The inner wall of the curved outer sleeve plate 25 is rotatably connected to the outer wall of the outer shaft 24, and the bottom end of the curved outer sleeve plate 25 is fixedly connected to the positioning groove plate 1. A bracket 27 is fixedly connected to one end of the positioning groove plate 1, and a curved plate 28 is fixedly installed at the top of the bracket 27. Multiple supports 29 are fixedly connected to one side of the curved plate 28. This allows various sizes of curved steel plates to be moved to the left and placed in the gap between the curved outer sleeve plate 25 and the curved inner sleeve plate 30. In this way, the curved outer sleeve plate 25 can contact the central position of the outer wall of various sizes of curved steel plates. At the same time, the inner wall of the curved outer sleeve plate 25 has multiple holes, which will not affect the welding gap space of various sizes of curved steel plates. The bracket 27 provides support for the curved plate 28, and the multiple supports 29 distribute and position the left end of various sizes of curved steel plates, resulting in higher positioning stability.

[0048] In this embodiment, as Figure 8As shown, a curved inner sleeve plate 30 is installed in the middle of the outer wall of the inner shaft 6. The curved inner sleeve plate 30 is rotatably connected to the outer wall of the inner shaft 6, and the positioning groove plate 1 is fixedly connected to the bottom end of the curved inner sleeve plate 30. This allows the curved inner sleeve plate 30 to contact the middle position of the inner wall of various sizes of arc-shaped steel plates, thereby realizing the internal positioning operation of various sizes of arc-shaped steel plates.

[0049] The working principle of the auxiliary clamping device for the steel plate welding machine of the present invention is as follows:

[0050] First, during the positioning and placement process of this invention, various curved steel plates of different sizes are moved to the left and placed in the gap between the curved outer sleeve plate 25 and the curved inner sleeve plate 30. At the same time, the leftward movement of the various curved steel plates of different sizes contacts the right end of multiple support columns 29. Meanwhile, the positioning groove plate 1 supports the bracket 27, the bracket 27 provides support force to the curved plate 28, the curved plate 28 supports multiple support columns 29, and the multiple support columns 29 provide distributed positioning support to the left end of the various curved steel plates of different sizes.

[0051] Secondly, when the present invention applies a driving force, the positioning slot plate 1 is supported on the outer wall of the electric cylinder 17. This causes the electric cylinder 17 to move the sensing end of the tension sensor 16 downwards, which in turn causes the tension sensor 16 to move the pull block 15 downwards. The pull block 15 then moves the two pull rods 14 downwards simultaneously. The pull rods 14 move the bottom end of the sleeve shaft 13 downwards, causing the sleeve shaft 13 to rotate the linkage shaft 12 counterclockwise, while the other linkage shaft 12 rotates clockwise. This causes the linkage shaft 12 to rotate the hinge sleeve 11 counterclockwise, which in turn causes the outer shaft 24 to rotate counterclockwise with a constant force. The other hinge sleeve 11, in turn, causes the inner shaft 6 to rotate clockwise with a constant force.

[0052] Simultaneously, when the present invention performs synchronous internal and external constant force clamping, the outer shaft 24 drives the two outer pressure strips 2 to rotate counterclockwise, the outer pressure strip 2 drives the outer tightening strip 3 to rotate counterclockwise, the outer tightening strip 3 drives the outer arc pressure strip 4 to rotate counterclockwise, and the outer arc pressure strip 4 drives the outer end pressure strip 5 to rotate counterclockwise. Since the inner arc diameter of the outer arc pressure strip 4 is larger than the inner arc diameter of the outer tightening strip 3, the inner arc diameter of the outer tightening strip 3 is larger than the inner arc diameter of the outer pressure strip 2, and the inner arc diameter of the outer pressure strip 2 is larger than the inner arc diameter of the outer end pressure strip 5, the outer pressure strip 2, the outer tightening strip 3, the outer arc pressure strip 4, and the outer end pressure strip 5 can all synchronously and vertically clamp and position the outer walls of various sizes of arc-shaped steel plates according to the specified pressure. Simultaneously, the inner shaft 6 drives the inner pressure bar 7 to rotate clockwise, which in turn drives the inner arc bar 8 to rotate clockwise. The inner arc bar 8 drives the inner moving bar 9 to rotate clockwise, and the inner moving bar 9 drives the inner end bar 10 to rotate clockwise. The inner arc diameter of the inner wall of the inner moving bar 9 is larger than that of the inner arc bar 8; the inner arc diameter of the inner wall of the inner arc bar 8 is larger than that of the inner arc bar 7; and the inner arc diameter of the inner wall of the inner pressure bar 7 is larger than that of the inner arc bar 10. In this way, the inner pressure bar 7, the inner arc bar 8, the inner moving bar 9, and the inner end bar 10 can all synchronously and vertically press and position the inner walls of various sizes of arc-shaped steel plates according to a specified pressure.

[0053] Simultaneously, during the synchronous pressing of the transverse ends, the outer arc pressure strip 4 rotates counterclockwise, causing the upper horizontal frame 18 to rotate counterclockwise. At the same time, the outer tightening strip 3 causes the middle horizontal frame 19 to rotate counterclockwise, and the outer pressure strip 2 causes the lower horizontal strip 20 to rotate counterclockwise. Furthermore, the pressing parts of the upper horizontal frame 18, middle horizontal frame 19, and lower horizontal strip 20 are all located at the transverse edges of the weld seams of various sizes of curved steel plates. This allows the upper horizontal frame 18, middle horizontal frame 19, and lower horizontal strip 20 to rotate counterclockwise, synchronously pressing and positioning the transverse weld seam edges of various sizes of curved steel plates according to a specified pressure. Simultaneously, the outer arc pressure strip 4 causes the connecting block 21 to rotate counterclockwise, and the connecting block 21 causes the curved end strip 22 to rotate counterclockwise. The left side of the curved end strip 22 presses against the right end face of various sizes of curved steel plates for synchronous positioning and pressing. Multiple weld holes 23 can retain a large welding space at the weld seam positions of various sizes of curved steel plates. When the tension value at the sensing end of the tension sensor 16 reaches the tension value set by the controller 26, the electric cylinder 17 is shut off by the controller 26.

[0054] Finally, when welding, the present invention uses a welding torch on a welding machine to weld the weld seams of various sizes of arc-shaped steel plates one by one, and multiple weld holes 23 retain welding space, which facilitates the welding operation of various sizes of arc-shaped steel plates.

[0055] All contents not described in detail in the specification are existing technologies known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are not shown in the figures because they are existing technologies, and will not be described here.

[0056] The above description is merely 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 principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An auxiliary clamping device for a steel plate welding machine, comprising a positioning groove plate (1), wherein an outer shaft (24) is provided above the positioning groove plate (1), and an inner and outer synchronous clamping mechanism is provided on the outer wall of the outer shaft (24), characterized in that: The internal and external synchronous pressing mechanism includes: Multiple outer pressure strips (2) are fixedly connected to the outer wall of the outer shaft (24). Each outer pressure strip (2) is fixedly connected to an outer tight strip (3) at its top end, and each outer tight strip (3) is fixedly connected to an outer arc pressure strip (4) at its top end. The outer end pressure strip (5) is fixedly connected to the top of the outer arc pressure strip (4), and the inner wall arc diameter of the outer arc pressure strip (4) is larger than the inner wall arc diameter of the outer tight strip (3); The inner wall arc diameter of the outer tight strip (3) is larger than the inner wall arc diameter of the outer pressure strip (2), the inner wall arc diameter of the outer pressure strip (2) is larger than the inner wall arc diameter of the outer end pressure strip (5), and an inner shaft (6) is provided on one side of the outer shaft (24). Multiple inner pressure strips (7) are fixedly connected to the outer wall of the inner shaft (6), and an inner arc strip (8) is fixedly connected to the top of each inner pressure strip (7). The inner moving strip (9) is fixedly located at the top of the inner arc strip (8). An inner end strip (10) is fixedly installed at the top of the inner moving strip (9). The inner wall arc diameter of the inner moving strip (9) is larger than the inner wall arc diameter of the inner arc strip (8). The inner arc diameter of the inner wall of the inner arc strip (8) is larger than that of the inner wall of the inner pressure strip (7), and the inner arc diameter of the inner wall of the inner pressure strip (7) is larger than that of the inner wall of the inner end strip (10). A driving force assembly is provided on the outside of the outer pressure strip (2) and near one end thereof. The driving force assembly is used to drive the outer shaft (24) and the inner shaft (6) to rotate with constant force. A transverse end synchronous pressing assembly is provided on one side of the outer arc pressure strip (4). The transverse end synchronous pressing assembly includes: The upper horizontal frame (18) is fixedly connected to one side of the outer arc pressure strip (4), and the middle horizontal frame (19) is fixedly connected to one side of the outer tight strip (3). The lower horizontal bar (20) is fixedly connected to one side of the outer pressure bar (2), and the upper horizontal frame (18), the middle horizontal frame (19) and the lower horizontal bar (20) are arranged in a curved path; The connecting block (21) is fixedly connected to the other side of the outer arc pressure strip (4). A curved end strip (22) is fixedly installed at the bottom of the connecting block (21). Multiple welding holes (23) are opened on the inner wall of the curved end strip (22). The bottom of the inner wall of the curved end strip (22) is rounded. The multiple welding holes (23) are arranged in a curved path.

2. The auxiliary clamping device for a steel plate welding machine according to claim 1, characterized in that: The driving force component includes: Two hinge sleeves (11), one hinge sleeve (11) is fixedly connected to the outer wall of the outer shaft (24) and close to one end thereon, and the other hinge sleeve (11) is fixedly connected to the outer wall of the inner shaft (6) and close to one end thereon. A linkage shaft (12) is fixedly connected to one side of the inner wall of each hinge sleeve (11). A sleeve shaft (13) is rotatably mounted on the outer wall of the linkage shaft (12), and a pull rod (14) is rotatably connected to the inner wall of the sleeve shaft (13) at a position away from the linkage shaft (12). A groove block (15) is installed at one end of a pull rod (14). Both pull rods (14) are fixedly connected to the groove block (15). A tension sensor (16) is fixedly installed on the lower surface of the groove block (15). An electric cylinder (17) is installed at the bottom of a tension sensor (16). The outer wall of the electric cylinder (17) is fixedly connected to the positioning groove plate (1). The retraction end of the electric cylinder (17) is fixedly connected to the sensing end of the tension sensor (16). A controller (26) is fixedly connected to one side of the positioning groove plate (1) and near its corner.

3. The auxiliary clamping device for a steel plate welding machine according to claim 2, characterized in that: The electric cylinder (17) and the tension sensor (16) are both electrically connected to the controller (26), with the sensing end of the tension sensor (16) facing downwards.

4. The auxiliary clamping device for a steel plate welding machine according to claim 1, characterized in that: A curved outer sleeve plate (25) is fixedly connected to the upper surface of the positioning groove plate (1) and near its middle position. The inner wall of the curved outer sleeve plate (25) is rotatably connected to the outer wall of the outer shaft (24). The bottom end of the curved outer sleeve plate (25) is fixedly connected to the positioning groove plate (1). A bracket (27) is fixedly connected to one end of the positioning groove plate (1), and a curved plate (28) is fixedly installed at the top of the bracket (27). Multiple support columns (29) are fixedly connected to one side of the curved plate (28).

5. The auxiliary clamping device for a steel plate welding machine according to claim 1, characterized in that: A curved inner sleeve plate (30) is installed in the middle of the outer wall of the inner shaft (6). The curved inner sleeve plate (30) is rotatably connected to the outer wall of the inner shaft (6). The positioning groove plate (1) is fixedly connected to the bottom end of the curved inner sleeve plate (30).

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