A large high-strength steel member threaded hole tapping tool

Abstract

This utility model discloses a tapping fixture for threaded holes in large high-strength steel components, comprising: a rod-shaped component with a square column at one end for connecting a tapping machine, and a cylinder and a hexagonal head at the end of the cylinder at the other end; a cylindrical component including a cylindrical part and a cylindrical part welded together; the cylindrical part having a square inner hole for mounting a tap; the cylindrical part having a semi-closed hexagonal hole matching the hexagonal head and a through hole with clearance fit to the cylinder; wherein, the hexagonal head and the semi-closed hexagonal hole, and the cylinder and the through hole, are all large clearance fits, realizing circumferential limiting and axial floating connection between the rod-shaped component and the cylindrical component. The two parts of this utility model fixture are flexibly connected, transmitting unidirectional torque, improving the perpendicularity of the threaded hole, solving the problems of poor perpendicularity and high risk of tap breakage in the machining of threaded holes in large components, significantly improving machining efficiency and reducing costs.

Description

Technical Field

[0001] This utility model relates to the field of mechanical parts processing technology, specifically to a tapping tool for threaded holes in large high-strength steel components. Background Technology

[0002] For tapping threaded holes in large, high-strength steel components, large gantry milling machines are generally used for thread milling. However, this method involves large investments and high processing costs. Furthermore, it is difficult to perform secondary processing if the tool breaks during the process, requiring manual rework and resulting in repeated processing. On the other hand, when using pneumatic or electric tapping machines, leveling the structural components with complex shapes is more difficult. Moreover, the electric tapping machine is rigidly connected to the tap, and the leveling of the electric tapping machine directly affects the perpendicularity of the threaded hole, making it difficult to guarantee the perpendicularity of the threaded hole. Utility Model Content

[0003] The purpose of this utility model is to provide a tapping tool for threaded holes in large high-strength steel components, which aims to overcome the defects of the prior art and solve the problems of difficult leveling of structural components and difficulty in ensuring the perpendicularity of threaded holes.

[0004] To address this, this utility model proposes a tapping fixture for threaded holes in large high-strength steel components, comprising: a rod-shaped component with a square column at one end for connecting a tapping machine, and a cylinder and a hexagonal head at the end of the cylinder at the other end; a cylindrical component comprising a cylindrical part and a cylindrical part welded together; the cylindrical part having a square inner hole for installing a tap; the cylindrical part having a semi-closed hexagonal hole matching the hexagonal head and a through hole with clearance fit to the cylinder; wherein, the hexagonal head and the semi-closed hexagonal hole, and the cylinder and the through hole, are all large clearance fits, realizing circumferential limiting and axial floating connection between the rod-shaped component and the cylindrical component, and the outer diameter of the hexagonal head is larger than the outer diameter of the cylinder to achieve axial anti-detachment.

[0005] As a preferred technical solution of this application, the axial single-sided gap between the hexagonal head and the semi-closed hexagonal hole is 1.5mm–2mm.

[0006] As a preferred technical solution of this application, the radial single-sided gap between the hexagonal head and the semi-closed hexagonal hole is 2mm–3mm.

[0007] As a preferred technical solution of this application, the radial single-sided gap between the cylinder and the through hole is controlled at 1.5mm-2mm.

[0008] As a preferred technical solution of this application, the column portion is provided with a radial threaded hole that connects to the square inner hole.

[0009] As a preferred technical solution of this application, the radial threaded hole is used to install a locking screw to radially fix the tap.

[0010] The tapping fixture for large, high-strength steel structural member threads provided by this utility model has the following beneficial effects:

[0011] 1) Through the axial floating connection design of rod-shaped structure and cylindrical structure, the leveling error between large components and tapping machine is automatically compensated, ensuring that the tap is always fed vertically along the pre-milled guide thread and avoiding thread skewing;

[0012] 2) The floating structure can absorb tangential forces and avoid stress concentration caused by rigid connection of the tap; together with the guiding effect of the guide thread, it reduces the lateral load of the tap and reduces the probability of breakage when tapping high-strength steel.

[0013] 3) The rod-shaped square column is plugged into the tapping machine interface, and the cylindrical radial screw quickly locks the tap, shortening auxiliary time; the tooling is designed to be detachable, adaptable to taps and tapping machines of different specifications;

[0014] 4) The cylindrical structure adopts a split welding process (the cylinder and column are assembled first and then welded), which reduces the difficulty of machining complex internal cavities; the clearance fit between the hexagonal head and the semi-closed hole has both torque transmission and anti-drop functions, eliminating the need for additional positioning components, and the structure is simple and durable.

[0015] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0017] Figure 1 This is a schematic diagram of the structure of the tapping tool for threaded holes in large high-strength steel components according to this utility model;

[0018] Figure 2 This is a schematic diagram of the cylindrical component in the threaded hole tapping tool for large high-strength steel components of this utility model.

[0019] Figure 3 This is a schematic diagram of the rod-shaped component in the threaded hole tapping tool for large high-strength steel components of this utility model.

[0020] Explanation of reference numerals in the attached drawings: 10, rod-shaped component; 20, cylindrical component; 1, square inner hole; 2, radial threaded hole; 3, semi-closed hexagonal hole; 4, through hole; 5, hexagonal head; 6, square prism; 7, cylinder. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] like Figures 1-3 As shown, the large high-strength steel component threading tooling of this utility model mainly includes two parts: a rod-shaped component 10 and a cylindrical component 20. The rod-shaped component 10 is connected to the lower end of the tapping machine, and the tap is fixed to the lower end of the cylindrical component 20. At the same time, the rod-shaped component 10 and the cylindrical component 20 are connected together by a large intermittent fit. The two are circumferentially limited and axially floating, and their central axes maintain a small amplitude of floating.

[0023] Specifically, the main structure of the rod-shaped component 10 is a cylinder 7, one end of which is a hexagonal head 5, and the other end of which is a square post 6. The square post 6 is used to connect and cooperate with the square interface at the lower end of the tapping machine, so that the rod-shaped component 10 can be detachably installed at the lower end of the tapping machine.

[0024] The cylindrical component 20 includes a cylindrical part and a cylindrical part welded together. The cylindrical part has a square inner hole 1 for installing a tap, and a radial threaded hole 2 is provided on the side wall of the cylindrical part. The radial threaded hole 2 communicates with the square inner hole 1. When the operator installs the tap in the square inner hole 1, the tap is radially fixed by installing a locking screw in the radial threaded hole 2 to prevent the tap from falling off.

[0025] The cylindrical part of the cylindrical component 20 has a semi-closed hexagonal hole 3 that matches the shape of the hexagonal head 5, and a through hole 4 that mates with the cylinder 7. The semi-closed hexagonal hole 3 and the through hole 4 are connected. The hexagonal head 5 is essentially a hexagonal prism boss, and the circumcircle of the hexagonal prism boss is larger than the outer diameter of the cylinder 7, so that the cylindrical component 20 and the rod-shaped component 10 are axially limited, achieving the effect of preventing detachment.

[0026] In addition, the hexagonal head 5 and the semi-closed hexagonal hole 3 are fitted with a large clearance; the cylinder 7 and the through hole 4 are also fitted with a large clearance, so that the rod-shaped component 10 and the cylindrical component 20 are circumferentially limited and axially floating, and torque can be transmitted between them, but they are not axially fixed and their coaxiality is not limited.

[0027] Before the cylindrical component 20 and the rod-shaped component 10 are assembled, the cylindrical part and the cylindrical part of the cylindrical component 20 are two independent parts. During assembly, the cylinder 7 is first inserted into the through hole 4, and the hexagonal head 5 is inserted into the semi-closed hexagonal hole 3 to connect the cylindrical part of the cylindrical component 20 and the rod-shaped component 10. Then, the cylindrical part and the cylindrical part of the cylindrical component 20 are welded together to form an integrated structure, thus completing the assembly of the cylindrical component 20 and the rod-shaped component 10.

[0028] When the large, high-strength steel components being processed cannot achieve high-precision leveling with the electric tapping machine, the non-rigid connection between the electric tapping machine and the tap can ensure that the tap taps along the guide tap, ensuring the perpendicularity of the thread; at the same time, it reduces the risk of the tap breaking due to tangential force.

[0029] This utility model provides a simple, fast, and effective machining solution, the specific solution of which is as follows:

[0030] 1) First, mount the large component on the processing equipment and level it. Then, while machining the threaded bottom hole on the large processing equipment, use a thread milling cutter to mill a 4-5 thread as a guide thread to ensure the perpendicularity of the guide thread.

[0031] 2) Large components are hoisted to the workbench, leveled, and then the tapping machine is fixed to the component; the rod-shaped part 10 at one end of the tooling is provided with a square post 6, which can be directly and quickly connected and fixed to the lower interface of the tapping machine;

[0032] 3) The cylindrical component 20 at the other end of the tooling is provided with a square inner hole 1 in the axial direction and a radial threaded hole 2 on the side. After the tap is inserted into the square inner hole 1, the tap is fixed by inserting a locking screw into the radial threaded hole 2.

[0033] 4) The rod-shaped component 10 and the cylindrical component 20 are connected through a semi-closed hexagonal hole 3 and a hexagonal head 5. The axial single-sided clearance of the semi-closed hexagonal hole 3 and the hexagonal head is controlled at 1.5mm-2mm, and the radial single-sided clearance is controlled at 2mm-3mm, to ensure that the rod-shaped component 10 and the cylindrical component 20 transmit only rotational force through the hexagonal threaded hole.

[0034] 5) When tapping, align the tap with the bottom hole of the workpiece thread, ensure that the tap follows the guide tap, ensure the perpendicularity of the thread, until the thread depth reaches the requirement.

[0035] This invention utilizes a tapping fixture for threaded holes in large high-strength steel components to solve the problem of difficult machining of threaded holes in large high-strength steel components, improve the machining efficiency and perpendicularity of threaded holes, and reduce the machining cost of threaded holes.

[0036] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A tapping tool for threaded holes in large high-strength steel components, characterized in that, include: The rod-shaped component (10) has a square post (6) at one end for connecting to the tapping machine, and a cylinder (7) and a hexagonal head (5) at the end of the cylinder (7) at the other end. The cylindrical component (20) includes a cylindrical part and a cylindrical part welded together; the cylindrical part is provided with a square inner hole (1) for installing a tap; the cylindrical part is provided with a semi-closed hexagonal hole (3) that matches the hexagonal head (5) and a through hole (4) that is clearance-fitted with the cylinder (7); Among them, the hexagonal head (5) and the semi-closed hexagonal hole (3) and the cylinder (7) and the through hole (4) are all large clearance fits to realize the circumferential limiting and axial floating connection of the rod-shaped component (10) and the cylindrical component (20), and the outer diameter of the hexagonal head (5) is larger than the outer diameter of the cylinder (7) to realize axial anti-fall-off.

2. The large high-strength steel member threaded hole tapping tooling of claim 1, wherein, The axial single-sided gap between the hexagonal head (5) and the semi-closed hexagonal hole (3) is 1.5mm–2mm.

3. The large high-strength steel member threaded hole tapping tooling of claim 2, wherein, The radial single-sided gap between the hexagonal head (5) and the semi-closed hexagonal hole (3) is 2mm–3mm.

4. The tapping fixture for threaded holes in large high-strength steel components according to claim 2, characterized in that, The radial single-sided gap between the cylinder (7) and the through hole (4) is controlled at 1.5mm-2mm.

5. The tapping fixture for threaded holes in large high-strength steel components according to claim 1, characterized in that, The column portion is provided with a radial threaded hole (2) that connects to the square inner hole (1).

6. The large high-strength steel member threaded hole tapping tooling of claim 5, wherein, The radial threaded hole (2) is used to install a locking screw to radially fix the tap.

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