A tooling jig suitable for fabricating arch ribs of steel box girders

Abstract

This utility model provides a tooling jig suitable for fabricating arch ribs of steel box girders, belonging to the field of jig technology. It includes a rectangular frame with several first connecting beams inside. Several support tubes are positioned above the first connecting beams, and several connecting plates are mounted on the outer walls of the support tubes. One end of each connecting plate is fixedly connected to the outer wall of the support tube, and the other end is fixedly connected to the upper surface of the first connecting beam. A sliding cavity is provided inside the support tube, and a connecting column is slidably mounted within the sliding cavity. An mounting hole is provided at the upper end of each connecting column, and a support column is slidably mounted within the mounting hole. The support column and the connecting column are detachably connected, and a support plate is mounted on the upper end of each support column. In this utility model, the support column and the connecting column are detachably connected. When the support plate experiences wear or deformation due to long-term use, the support column can be quickly replaced simply by removing it from the connecting column and installing a new support column and support plate, greatly shortening maintenance time and reducing maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of jig technology, and in particular to a jig suitable for the fabrication of arch ribs of steel box girders. Background Technology

[0002] The arch rib of a steel box girder is a common component in bridge structures, typically composed of arched ribs, a top plate, a bottom plate, and internal stiffening members, presenting an overall spatial curved shape. During the fabrication of the steel box girder arch rib, tooling jigs are often required to achieve precise positioning and stable welding of the various components. Therefore, the performance of the tooling jig directly affects the manufacturing quality and production efficiency of the steel box girder arch rib.

[0003] For example, Chinese patent CN220971285U discloses an adjustable-elevation arch rib steel frame, including an upper frame, an adjustment component, and a reinforcing component. The upper frame has symmetrically arranged supporting square tubes on its lower surface, with the lower ends of each supporting square tube fixedly connected to the upper surface of the lower frame. A support plate is provided between the front and rear inner walls of the supporting square tubes. The adjustment component is threaded to the middle of the support plate, and a U-shaped support seat is provided at its upper end. A rotating shaft is rotatably connected between the two vertical plates of the U-shaped support seat. Connecting plates are provided on the outer arc surfaces of both ends of the rotating shaft, and the top ends of the two connecting plates are fixedly connected to the lower surface of the top support plate. This adjustable-elevation arch rib steel frame can adjust the elevation to meet the construction needs of different bridges, and it is also easy to connect with each other, improving structural strength and ensuring construction quality.

[0004] The aforementioned jig can support the arch ribs through the top support plate. Due to the large self-weight of the steel box girder arch ribs, the top support plate bears a large load for a long time during the support process, which is prone to wear and deformation. Therefore, the top support plate needs to be replaced regularly. However, the top support plate and the connecting plate are fixedly connected. When the top support plate is damaged, the entire connection structure needs to be disassembled for replacement. This is not only cumbersome and time-consuming, making it difficult to achieve quick replacement, but it may also affect the stability of other components of the jig during the disassembly process, thereby reducing production efficiency and increasing maintenance costs. It is difficult to meet the requirements for efficient and stable production of steel box girder arch ribs. Utility Model Content

[0005] This utility model provides a tooling jig suitable for the fabrication of arch ribs of steel box girders, which solves the technical problem that it is difficult to quickly replace the top support plate of the current jig after it is damaged.

[0006] To solve the above-mentioned technical problems, this utility model discloses a tooling frame suitable for the fabrication of arch ribs of steel box girders, comprising: a rectangular frame, several first connecting beams arranged inside the rectangular frame, the left and right ends of the first connecting beams being fixedly connected to the inner walls of the left and right sides of the rectangular frame respectively, several supporting pipes being arranged above the first connecting beams, several connecting plates being arranged on the outer walls of the supporting pipes, one end of the connecting plate being fixedly connected to the outer wall of the supporting pipe, and the other end of the connecting plate being fixedly connected to the upper surface of the first connecting beam, a sliding cavity being arranged inside the supporting pipe, a connecting column being slidably arranged inside the sliding cavity, an installation hole being arranged at the upper end of the connecting column, a supporting column being slidably arranged inside the installation hole, the supporting column and the connecting column being detachably connected, and a supporting plate being arranged at the upper end of the supporting column.

[0007] Preferably, a through hole is provided on the side wall of the connecting column, which communicates with the interior of the sliding cavity. A rod is slidably installed in the through hole. A slot is provided on the outer wall of the support column, which is adapted to one end of the rod. The end of the rod away from the support column extends to the outside of the through hole and is provided with a pull plate. A return spring is sleeved on the outside of the rod. One end of the return spring is connected to the outer wall of the connecting column, and the other end of the return spring is connected to the pull plate.

[0008] Preferably, the connecting plates are inclined, and several connecting plates are distributed in a ring array about the center line of the support pipe.

[0009] Preferably, a number of first connecting beams are arranged at equal intervals along the front and rear directions of the rectangular frame.

[0010] Preferably, a plurality of second connecting beams are provided below the first connecting beam, and the front and rear ends of the second connecting beams are fixedly connected to the inner walls of the front and rear sides of the rectangular frame, respectively, and the upper surface of the second connecting beams is in contact with the lower surface of the first connecting beam.

[0011] Preferably, the second connecting beam is perpendicular to the first connecting beam.

[0012] Preferably, the support tube is located above the intersection of the first connecting beam and the second connecting beam.

[0013] Preferably, a threaded hole is provided at the lower end of the connecting column, a screw is provided in the threaded hole, the upper end of the screw is threadedly connected to the inner wall of the threaded hole, the screw extends to the lower part of the support tube and a turntable is provided, the position of the screw near the lower end is rotatably connected to the lower end of the support tube, a guide hole is provided on the front side wall of the support tube, the guide hole is connected to the sliding cavity, a guide column is slidably provided in the guide hole, and one end of the guide column is connected to the outer wall of the connecting column.

[0014] Preferably, the upper outer wall of the support tube is provided with an external thread, the upper end of the support tube is provided with a rotating block, the inner wall of the rotating block is provided with an internal thread, the inner wall of the rotating block is threadedly connected to the upper outer wall of the support tube, the lower end of the rotating block is fixedly provided with an adjusting block, the adjusting block is provided with an adjusting cavity, the adjusting cavity is frustum-shaped, the upper outer wall of the support tube is provided with a sliding hole, a sliding column is slidably provided in the sliding hole, a ball is provided at the end of the sliding column away from the connecting column, the ball contacts the inner wall of the adjusting block, a fixing ring is fixedly provided on the outer wall of the sliding column, and several spring rods are provided on the side of the fixing ring near the support tube, one end of the spring rod is connected to the fixing ring, and the other end of the spring rod is connected to the outer wall of the support tube.

[0015] Preferably, an abutment block is provided at one end of the sliding post near the connecting post, and the abutment block is located inside the sliding hole.

[0016] The technical solution of this utility model has the following advantages: This utility model provides a tooling jig suitable for the fabrication of arch ribs of steel box girders, relating to the field of jig technology. It includes a rectangular frame, within which several first connecting beams are arranged. The left and right ends of the first connecting beams are fixedly connected to the inner walls of the left and right sides of the rectangular frame, respectively. Several support pipes are arranged above the first connecting beams, and several connecting plates are arranged on the outer walls of the support pipes. One end of the connecting plate is fixedly connected to the outer wall of the support pipe, and the other end of the connecting plate is fixedly connected to the upper surface of the first connecting beam. A sliding cavity is provided inside the support pipe, and a connecting column is slidably arranged within the sliding cavity. An installation hole is provided at the upper end of the connecting column, and a support column is slidably arranged within the installation hole. The support column and the connecting column are detachably connected, and a support plate is provided at the upper end of the support column. In this utility model, the support column and the connecting column are detachably connected. When the support plate experiences wear or deformation due to long-term use, it is not necessary to disassemble the entire jig structure. Simply removing the support column from the connecting column allows for quick replacement of the support plate, greatly shortening maintenance time, reducing maintenance costs, and improving the production efficiency of arch ribs for steel box girders.

[0017] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the means particularly pointed out in the written description and the accompanying drawings.

[0018] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1This is a schematic diagram of the overall structure of a tooling frame suitable for fabricating arch ribs of steel box girders according to the present invention;

[0021] Figure 2 This is a top view of a tooling frame suitable for fabricating arch ribs of steel box girders according to the present invention;

[0022] Figure 3 This is a schematic diagram of the internal structure of the support tube in this utility model;

[0023] Figure 4 This utility model Figure 3 Enlarged view of the structure at point A in the middle.

[0024] In the diagram: 1. Rectangular frame; 2. First connecting beam; 3. Support tube; 4. Connecting plate; 5. Sliding cavity; 6. Connecting column; 7. Mounting hole; 8. Support column; 9. Support plate; 10. Insert rod; 11. Slot; 12. Pull plate; 13. Return spring; 14. Second connecting beam; 15. Threaded hole; 16. Screw; 17. Turntable; 18. Guide hole; 19. Guide column; 20. Rotating block; 21. Adjusting block; 22. Adjusting cavity; 23. Sliding column; 24. Ball bearing; 25. Fixing ring; 26. Spring rod; 27. Abutment block. Detailed Implementation

[0025] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0026] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the utility model. They are merely used to distinguish components or operations described using the same technical terms, and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions and features of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, such a combination should be considered non-existent and not within the scope of protection claimed by this utility model.

[0027] Example 1:

[0028] This utility model embodiment provides a tooling jig suitable for fabricating the arch ribs of steel box girders, such as... Figures 1-4As shown, it includes: a rectangular frame 1, several first connecting beams 2 are arranged inside the rectangular frame 1, the left and right ends of the first connecting beams 2 are fixedly connected to the inner walls of the left and right sides of the rectangular frame 1 respectively, several support pipes 3 are arranged above the first connecting beams 2, several connecting plates 4 are arranged on the outer wall of the support pipes 3, one end of the connecting plate 4 is fixedly connected to the outer wall of the support pipe 3, and the other end of the connecting plate 4 is fixedly connected to the upper surface of the first connecting beam 2, a sliding cavity 5 is arranged inside the support pipe 3, a connecting column 6 is slidably arranged inside the sliding cavity 5, an installation hole 7 is arranged at the upper end of the connecting column 6, a support column 8 is slidably arranged inside the installation hole 7, the support column 8 and the connecting column 6 are detachably connected, and a support plate 9 is arranged at the upper end of the support column 8;

[0029] A through hole is provided on the side wall of the connecting column 6, which communicates with the interior of the sliding cavity 5. A rod 10 is slidably installed in the through hole. A slot 11 is provided on the outer wall of the support column 8. The slot 11 is adapted to one end of the rod 10. The end of the rod 10 away from the support column 8 extends to the outside of the through hole and is provided with a pull plate 12. A return spring 13 is sleeved on the outside of the rod 10. One end of the return spring 13 is connected to the outer wall of the connecting column 6, and the other end of the return spring 13 is connected to the pull plate 12.

[0030] The connecting plates 4 are inclined, and several connecting plates 4 are arranged in a ring array about the center line of the support tube 3;

[0031] Several first connecting beams 2 are set at equal intervals along the front and rear directions of the rectangular frame 1.

[0032] The working principle and beneficial effects of the above technical solution are as follows: The tooling fixture uses a rectangular frame 1 as the basic load-bearing structure, and sets equally spaced first connecting beams 2 inside to enhance the overall rigidity of the rectangular frame 1. Multiple support pipes 3 are set above the first connecting beams 2. The support pipes 3 are set vertically and are fixedly connected to the upper surface of the first connecting beams 2 through multiple inclined connecting plates 4. A sliding cavity 5 is set inside the support pipe 3, and a connecting column 6 is slidably set inside the sliding cavity 5. An installation hole 7 is set at the upper end of the connecting column 6. The lower end of the support column 8 is inserted into the installation hole 7. Then, one end of the insertion rod 10 is inserted into the slot 11 on the outer wall of the support column 8, so that the support column 8 and the connecting column 6 are detachably connected. During the production of the arch rib, the support plate 9 can support the arch rib. When the support plate 9 suffers wear and deformation due to long-term use, the pull plate 12 is pulled outward first. The insertion rod 10 slides within the through hole, separating it from the slot 11. The return spring 13 stretches, and the support column 8 is pulled upwards. The support column 8 can then be removed from the mounting hole 7 of the connecting column 6. Next, a new support column 8 and support plate 9 are taken. The new support column 8 is inserted into the mounting hole 7, and the pull plate 12 is released. Under the action of the return spring 13, the pull plate 12 slides towards the connecting column 6, and the insertion rod 10 is inserted into the slot 11 of the new support column 8, completing the rapid installation of the support column 8. This allows for the rapid replacement of the support plate 9. During the replacement process, there is no need to disassemble the entire structure of the jig, greatly shortening maintenance time, reducing maintenance costs, and improving the production efficiency of the steel box girder arch rib. The inclined connecting plate 4 can connect with the first connecting beam 2, thereby providing stable support for the support tube 3 and improving the stability of the support tube 3.

[0033] Example 2:

[0034] Based on the above embodiment 1, as follows Figure 1 , Figure 2 As shown, several second connecting beams 14 are provided below the first connecting beam 2. The front and rear ends of the second connecting beams 14 are fixedly connected to the inner walls of the front and rear sides of the rectangular frame 1, respectively. The upper surface of the second connecting beams 14 is in contact with the lower surface of the first connecting beam 2.

[0035] The second connecting beam 14 is perpendicular to the first connecting beam 2;

[0036] The support pipe 3 is located above the intersection of the first connecting beam 2 and the second connecting beam 14.

[0037] The working principle and beneficial effects of the above technical solution are as follows: multiple first connecting beams 2 and second connecting beams 14 intersect to form a crisscrossing grid-like support structure, which further improves the overall rigidity of the rectangular frame 1 and enhances the overall load-bearing capacity of the jig, enabling the jig to adapt to the fabrication of heavier steel box girder arch ribs. The upper surface of the second connecting beam 14 contacts the lower surface of the first connecting beam 2, which can support the first connecting beam 2, thereby improving the stability of the first connecting beam 2. The support pipe 3 is located above the intersection of the first connecting beam 2 and the second connecting beam 14, so that the load can be diffused to the surrounding area of ​​the rectangular frame 1 through the two mutually perpendicular first connecting beams 2 and second connecting beams 14, avoiding the load concentration on the first connecting beam 2 and extending the service life of the jig.

[0038] Example 3:

[0039] Based on Example 1 or 2, such as Figure 1 , Figure 3 As shown, a threaded hole 15 is provided at the lower end of the connecting column 6, and a screw 16 is provided inside the threaded hole 15. The upper end of the screw 16 is threadedly connected to the inner wall of the threaded hole 15. The screw 16 extends to the lower part of the support tube 3 and is provided with a turntable 17. The screw 16 is rotatably connected to the lower end of the support tube 3 near its lower end. A guide hole 18 is provided on the front side wall of the support tube 3. The guide hole 18 communicates with the sliding cavity 5. A guide column 19 is slidably provided inside the guide hole 18. One end of the guide column 19 is connected to the outer wall of the connecting column 6.

[0040] The working principle and beneficial effects of the above technical solution are as follows: Rotating the turntable 17 can drive the screw 16 to rotate inside the support tube 3. The upper end of the screw 16 is connected to the threaded hole 15 at the lower end of the connecting column 6 by threaded transmission. The rotation of the screw 16 can drive the connecting column 6 to slide inside the sliding cavity 5. Since the outer wall of the support tube 3 is provided with a vertically elongated guide hole 18, the connecting column 6 drives the guide column 19 to slide along the inner wall of the guide hole 18, thereby limiting and guiding the movement of the connecting column 6, preventing the connecting column 6 from rotating with the screw 16, so that the connecting column 6 can perform vertical lifting and lowering movements inside the sliding cavity 5. The sliding of the connecting column 6 along the inner wall of the sliding cavity 5 can drive the support column 8 to move synchronously, thereby adjusting the height of the support plate 9, so that the support plate 9 can adapt to the arch ribs of steel box girders with different curved surfaces, expanding the applicable range of the support plate 9. The threaded transmission has a self-locking characteristic. After adjustment, the connecting column 6 can be stably kept inside the sliding cavity 5, improving the reliability of the support plate 9 in supporting the arch ribs of the steel box girders.

[0041] Example 4:

[0042] Based on any one of Examples 1-3, such as Figure 3 , Figure 4As shown, the upper outer wall of the support tube 3 is provided with an external thread, and a rotating block 20 is provided at the upper end of the support tube 3. The inner wall of the rotating block 20 is provided with an internal thread, and the inner wall of the rotating block 20 is threadedly connected to the upper outer wall of the support tube 3. An adjusting block 21 is fixedly provided at the lower end of the rotating block 20. An adjusting cavity 22 is provided inside the adjusting block 21. The adjusting cavity 22 is frustoconical. A sliding hole is provided at the upper outer wall of the support tube 3. A sliding column 23 is slidably provided in the sliding hole. A ball 24 is provided at the end of the sliding column 23 away from the connecting column 6. The ball 24 contacts the inner wall of the adjusting block 21. A fixing ring 25 is fixedly provided on the outer wall of the sliding column 23. Several spring rods 26 are provided on the side of the fixing ring 25 near the support tube 3. One end of the spring rod 26 is connected to the fixing ring 25, and the other end of the spring rod 26 is connected to the outer wall of the support tube 3.

[0043] An abutment block 27 is provided at one end of the sliding post 23 near the connecting post 6, and the abutment block 27 is located inside the sliding hole.

[0044] The working principle and beneficial effects of the above technical solution are as follows: After the height of the support plate 9 is adjusted, the rotating block 20 outside the support tube 3 is rotated. The rotating block 20 rotates along the thread on the outer wall of the support tube 3 and moves downward along the axial direction of the support tube 3. The rotating block 20 drives the adjusting block 21 to move downward synchronously. Under the action of the spring rod 26, the ball 24 contacts the inner wall of the adjusting cavity 22. Since the adjusting block 21 is provided with a frustum-shaped adjusting cavity 22, the inner diameter of the adjusting cavity 22 gradually decreases from bottom to top. As the adjusting block 21 rotates downward, the inner wall of the adjusting cavity 22 gradually squeezes the ball 24. The ball 24 drives the sliding column 23 to slide towards the connecting column 6. The spring rod 26 is gradually compressed until the abutting block 27 abuts against the outer wall of the connecting column 6. The abutting block 27 can be made of anti-slip rubber material, which can not only reduce the wear on the outer wall of the connecting column 6, but also make the abutting block 27 abut against the outer wall of the connecting column 6. The abutment of the wall fixes the connecting column 6 inside the support tube 3, preventing the connecting column 6 from shaking or sliding up and down during the support process, thus improving the stability of the connecting column 6 inside the support tube 3. When vibration occurs during the welding of the arch rib of the steel box girder, the close contact between the abutment block 27 and the outer wall of the connecting column 6 ensures the stability of the height of the connecting column 6, improving the reliability of the support plate 9 in supporting the arch rib of the steel box girder. When it is necessary to adjust the height of the connecting column 6, the rotating block 20 is rotated in the opposite direction. The rotating block 20 moves upward along the axis of the support tube 3, reducing the squeezing force of the inner wall of the adjusting cavity 22 on the ball 24. Under the elastic force of the spring rod 26, the fixing ring 25 moves away from the connecting column 6, and drives the sliding column 23 to move away from the connecting column 6. The abutment block 27 separates from the outer wall of the connecting column 6. Rotating the turntable 17 allows the connecting column 6 to slide up and down in the sliding cavity 5, thereby adjusting the height of the support plate 9.

[0045] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0046] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0047] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A tooling jig frame suitable for the manufacture of steel box girder arch ribs, characterised in that, include: A rectangular frame (1) is provided with several first connecting beams (2) inside the rectangular frame (1). The left and right ends of the first connecting beams (2) are fixedly connected to the inner walls of the left and right sides of the rectangular frame (1) respectively. Several support pipes (3) are provided above the first connecting beams (2). Several connecting plates (4) are provided on the outer wall of the support pipes (3). One end of the connecting plate (4) is fixedly connected to the outer wall of the support pipe (3), and the other end of the connecting plate (4) is fixedly connected to the upper surface of the first connecting beam (2). A sliding cavity (5) is provided inside the support pipe (3). A connecting column (6) is slidably provided inside the sliding cavity (5). An installation hole (7) is provided at the upper end of the connecting column (6). A support column (8) is slidably provided inside the installation hole (7). The support column (8) and the connecting column (6) are detachably connected. A support plate (9) is provided at the upper end of the support column (8).

2. The jig frame suitable for manufacturing the steel box beam arch rib according to claim 1, characterized in that, A through hole is provided on the side wall of the connecting column (6), which is connected to the inside of the sliding cavity (5). A plug rod (10) is slidably installed in the through hole. A slot (11) is provided on the outer wall of the support column (8). The slot (11) is adapted to one end of the plug rod (10). The end of the plug rod (10) away from the support column (8) extends to the outside of the through hole and is provided with a pull plate (12). A reset spring (13) is sleeved on the outside of the plug rod (10). One end of the reset spring (13) is connected to the outer wall of the connecting column (6), and the other end of the reset spring (13) is connected to the pull plate (12).

3. The jig frame suitable for manufacturing the steel box beam arch rib according to claim 1, characterized in that, The connecting plate (4) is set at an angle, and several connecting plates (4) are arranged in a ring array about the center line of the support pipe (3).

4. The jig frame for manufacturing the steel box beam arch rib according to claim 1, wherein, Several first connecting beams (2) are set at equal intervals along the front and rear directions of the rectangular frame (1).

5. The jig frame for manufacturing the steel box beam arch rib according to claim 1, wherein, Several second connecting beams (14) are provided below the first connecting beam (2). The front and rear ends of the second connecting beams (14) are fixedly connected to the inner walls of the front and rear sides of the rectangular frame (1), respectively. The upper surface of the second connecting beams (14) is in contact with the lower surface of the first connecting beam (2).

6. The jig frame according to claim 5, characterized in that, The second connecting beam (14) is perpendicular to the first connecting beam (2).

7. The jig frame according to claim 6, characterized in that, The support tube (3) is located above the intersection of the first connecting beam (2) and the second connecting beam (14).

8. A tooling jig suitable for fabricating arch ribs of steel box girders according to claim 1, characterized in that, A threaded hole (15) is provided at the lower end of the connecting column (6), and a screw (16) is provided in the threaded hole (15). The upper end of the screw (16) is threadedly connected to the inner wall of the threaded hole (15). The screw (16) extends to the lower part of the support tube (3) and is provided with a turntable (17). The screw (16) is rotatably connected to the lower end of the support tube (3) near the lower end. A guide hole (18) is provided on the front side wall of the support tube (3). The guide hole (18) is connected to the sliding cavity (5). A guide column (19) is slidably provided in the guide hole (18). One end of the guide column (19) is connected to the outer wall of the connecting column (6).

9. The jig frame according to claim 1, wherein, The upper outer wall of the support tube (3) is provided with an external thread, and the upper end of the support tube (3) is provided with a rotating block (20). The inner wall of the rotating block (20) is provided with an internal thread. The inner wall of the rotating block (20) is connected to the upper outer wall of the support tube (3) by a threaded transmission. The lower end of the rotating block (20) is fixedly provided with an adjusting block (21). The adjusting block (21) is provided with an adjusting cavity (22). The adjusting cavity (22) is shaped like a frustum. The upper outer wall of the support tube (3) is provided with a sliding hole. The sliding column (23) is slidably provided in the sliding hole. The end of the sliding column (23) away from the connecting column (6) is provided with a ball (24). The ball (24) contacts the inner wall of the adjusting block (21). The outer wall of the sliding column (23) is fixedly provided with a fixing ring (25). The side of the fixing ring (25) close to the support tube (3) is provided with several spring rods (26). One end of the spring rod (26) is connected to the fixing ring (25), and the other end of the spring rod (26) is connected to the outer wall of the support tube (3).

10. The jig frame according to claim 9, characterized in that, An abutment block (27) is provided at one end of the sliding post (23) near the connecting post (6), and the abutment block (27) is located inside the sliding hole.

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