Reusable drilling tool capable of improving bolting precision

Abstract

The utility model provides a reusable drilling tool capable of improving bolting precision, which belongs to the technical field of drilling tools and comprises a drilling template, a drilling area is arranged on the drilling template, a plurality of drilling holes arranged at intervals are arranged on the drilling area, and wear-resistant drilling sleeves are sleeved in the drilling holes. According to the utility model, the influence of welding shrinkage and a special-shaped arch curved surface can be eliminated, a high-precision reusable mold tool is designed, the mold tool is used for drilling stiffening bolt holes, high-precision manufacturing of hole sites and the one-time penetration rate of field mounting hole groups are ensured, meanwhile, the drill bushing is arranged in a drill hole in a sleeving manner, and the drill bushing can be replaced according to the abrasion condition, so that the production efficiency is improved. And the hole forming template does not need to be replaced, so that the service life of the hole forming template can be prolonged, and the damage and replacement cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of drilling tooling technology, and in particular to a reusable drilling tooling for improving bolting accuracy. Background Technology

[0002] In the construction of steel box arch bridges or other steel structure bridges, the accurate drilling of stiffening bolt holes is a crucial step, as it directly affects the connection strength between structural components and the overall safety of the bridge. Many existing drilling tools directly use steel plates for drilling, but these templates are prone to damage during the drilling process. If even one hole is damaged, the entire template needs to be replaced, resulting in a short service life and high costs. Therefore, a high-precision drilling tool with a long service life is needed. Utility Model Content

[0003] The purpose of this invention is to provide a reusable drilling tool that improves bolting accuracy and solves the technical problems of short service life and high replacement cost of existing drilling tools.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A reusable drilling tool for improving bolting accuracy includes a hole-making template with a drilling area and a number of spaced-apart holes, with wear-resistant drill sleeves fitted inside the holes.

[0006] Furthermore, the hole-making template has slots on all four sides, with the slots located in the middle of the side.

[0007] Furthermore, the drill bushing includes a cylinder wall and a top edge, the internal drill bushing holes of the cylinder wall and the top edge are the same size, the cylinder wall and the top edge are integrally formed, and the outer diameter of the top edge is larger than the outer diameter of the cylinder wall.

[0008] Furthermore, the outer diameter of the cylinder wall is smaller than the diameter of the borehole by 3-5 mm, while the outer diameter of the top edge is larger than the diameter of the borehole. The cylinder wall is fitted onto the inner wall of the borehole, and the top edge is attached to the borehole wall.

[0009] Furthermore, a recessed replacement pry groove is provided at the connection between the cylinder wall and the top edge, and the replacement pry groove is a circular groove.

[0010] Furthermore, the upper end of the drill sleeve hole is set as a wide opening, the wide opening is set as an inclined circle, the radius of the bottom end is the same as the radius of the drill sleeve hole, and the upper radius of the wide opening is larger than the radius of the drill sleeve hole.

[0011] This utility model, by adopting the above-mentioned technical solution, has the following beneficial effects:

[0012] This invention eliminates the effects of welding shrinkage and irregular arched surfaces, and designs a high-precision, reusable mold tooling for drilling stiffening bolt holes. This ensures high-precision manufacturing of the hole positions and a high first-pass rate for on-site installation of hole groups. At the same time, a drill sleeve is set inside the drill hole, and the drill sleeve can be replaced according to the wear condition, without the need to replace the hole-making template. This can improve the service life of the hole-making template and reduce the cost of replacement due to damage. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the hole-making template structure of this utility model;

[0014] Figure 2 This is a cross-sectional view of the drill bushing of this utility model.

[0015] In the attached diagram, 1-hole template, 2-drilling area, 3-drill hole, 4-groove, 5-drill sleeve, 6-drill sleeve hole, 7-cylinder wall, 8-top edge, 9-upper wide opening, 10-replacement reserved prying groove. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided with reference to the accompanying drawings and preferred embodiments. However, it should be noted that many details listed in the specification are merely to provide the reader with a thorough understanding of one or more aspects of this utility model, and these aspects can be achieved even without these specific details.

[0017] like Figure 1-2 As shown, a reusable drilling tool for improving bolting accuracy includes a hole-making template 1, a drilling area 2 on the hole-making template 1, a plurality of drill holes 3 spaced apart on the drilling area 2, and a wear-resistant drill sleeve 5 fitted inside the drill holes 3.

[0018] In this embodiment of the invention, the hole-making template 1 has slots 4 on all four sides, with the slots 4 positioned in the middle of the sides. The hole-making template 1 is made of steel plate with a material of 0.235-16 μm, and the number of templates used is determined by the production department according to actual production needs. The slots 4 are used to fix the connection between the block hole-making templates 1, and then, on the outermost side, a fixed fixing block is welded for stability, ensuring that the position does not shift and that the drilling accuracy is higher.

[0019] In this embodiment of the invention, the drill bushing 5 includes a cylindrical wall 7 and a top edge 8. The internal drill bushing holes of the cylindrical wall 7 and the top edge 8 are of the same size, and the cylindrical wall 7 and the top edge 8 are integrally formed. The outer diameter of the top edge 8 is larger than the outer diameter of the cylindrical wall 7. The drill bushing 5 is wear-resistant and can be reused multiple times. The drill bushing 5 is machined to the required dimensions using 245 / 45# round steel. Sharp edges are blunted, with a chamfer of 0.5*45 degrees, and it undergoes quenching treatment before use.

[0020] In this embodiment of the invention, the outer diameter of the cylinder wall 7 is smaller than the diameter of the drill hole 3 by 3-5 mm, while the outer diameter of the top edge 8 is larger than the diameter of the drill hole 3. The cylinder wall 7 is fitted onto the inner wall of the drill hole 3, and the top edge 8 is attached to the hole wall of the drill hole 3. The drill sleeve hole 6 of the drill sleeve 5 is a φ26 hole, and the outer diameter of the drill sleeve hole 6 is 36 mm. This sleeve is inserted into the drill hole 3 of the hole-making template 1, and a bolt hole with a diameter of 26 mm is drilled through the drill sleeve hole 6 using a drill bit.

[0021] In this embodiment of the invention, a recessed replacement pry groove 10 is provided at the connection between the cylinder wall 7 and the top edge 8. The replacement pry groove 10 is a circular groove. The replacement pry groove 10 facilitates the insertion of a pry bar during later replacement, making replacement convenient.

[0022] In this embodiment of the invention, the upper end of the drill bushing hole 6 is configured as an upper wide opening 9, which is an inclined circle with the same radius at the bottom as the drill bushing hole 6. The upper radius of the upper wide opening 9 is larger than the radius of the drill bushing hole 6. The upper wide opening 9 is designed to reduce wear and extend service life.

[0023] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A reusable drilling tool for improving bolting accuracy, characterized in that: It includes a hole-making template (1), a drilling area (2) is provided on the hole-making template (1), a number of drill holes (3) are provided on the drilling area (2) at intervals, and a wear-resistant drill sleeve (5) is provided inside the drill hole (3).

2. The reusable drilling tool for improving bolting accuracy according to claim 1, characterized in that: The hole-making template (1) has slots (4) on all four sides, and the slots (4) are located in the middle of the side.

3. The reusable drilling tool for improving bolting accuracy according to claim 1, characterized in that: The drill bushing (5) includes a cylindrical wall (7) and a top edge (8). The internal drill bushing holes of the cylindrical wall (7) and the top edge (8) are the same size. The cylindrical wall (7) and the top edge (8) are integrally formed. The outer diameter of the top edge (8) is larger than the outer diameter of the cylindrical wall (7).

4. A reusable drilling tool for improving bolting accuracy according to claim 3, characterized in that: The outer diameter of the cylinder wall (7) is smaller than the diameter of the borehole (3) by 3-5 mm, and the outer diameter of the top edge (8) is larger than the diameter of the borehole (3). The cylinder wall (7) is fitted on the inner side wall of the borehole (3), and the top edge (8) is attached to the borehole wall of the borehole (3).

5. A reusable drilling tool for improving bolting accuracy according to claim 4, characterized in that: A recessed replacement pry groove (10) is provided at the connection between the cylinder wall (7) and the top edge (8). The replacement pry groove (10) is a circular groove.

6. A reusable drilling tool for improving bolting accuracy according to claim 4, characterized in that: The upper end of the drill bushing hole (6) is set as an upper wide opening (9), the upper wide opening (9) is set as an inclined circle, the radius of the bottom end is the same as the radius of the drill bushing hole (6), and the upper radius of the upper wide opening (9) is larger than the radius of the drill bushing hole (6).

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