Threaded hole tapping device on special-shaped surface

Abstract

The utility model discloses a tapping device for a threaded hole on a special-shaped surface, which comprises a guide sleeve arranged at the end part of a machine tool spindle, a movable rotating body is arranged in the guide sleeve, a drill chuck is arranged at the end part of the rotating body, a replaceable screw tap is arranged on the drill chuck, and the screw tap is arranged on the guide sleeve. And the rotating body can horizontally move and rotate along the guide sleeve in the guide sleeve. According to the special-shaped surface tapping device, the end of a machine tool is improved, the horizontal progress and the rotating strength of the rotating body can be adjusted according to requirements, the drill chuck can be arranged at the end of the rotating body for accurate tapping according to different special-shaped surfaces, the special-shaped surface tapping device is simple and convenient to apply and high in operability, and the special-shaped surfaces can be tapped as long as the machine tool can drill holes. The device can be used for tapping, the axis quality of the threaded hole can be guaranteed, and the threaded hole machining quality problems such as thread breakage are effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, and in particular to a tapping device for threaded holes on irregular surfaces. Background Technology

[0002] Threaded holes are the most common geometric feature in part drawings. Depending on the operating conditions, some threaded holes are perpendicular to planes, some are perpendicular to irregular surfaces, and some have a certain angle with irregular surfaces.

[0003] Conventional threaded hole machining involves first drilling a pilot hole on a machining center, and then tapping it with the machining center, or drilling the pilot hole on the machining center and then tapping with a radial drill or tapping machine. However, for some irregularly shaped parts, such as parts with threaded holes perpendicular to the irregular surface, drilling and tapping can be completed in one operation if a five-axis machine tool is available. However, for general machining plants, five-axis CNC machine tools are expensive, and using high-precision equipment just for tapping is not a good choice. In addition, the head of a five-axis CNC machine tool is relatively large, which cannot be fully extended when machining certain internal threaded holes. Therefore, it is necessary to consider a fixture that can be used with general-purpose equipment to solve this problem.

[0004] When machining the threaded hole using ordinary equipment, the pilot hole can be drilled using a three-axis or four-axis machine tool with an angle head attachment. However, tapping can only be done manually by a fitter, and the tapping quality is directly related to the fitter's skill level. Even so, it is difficult to ensure that the threaded hole is perpendicular to the irregular surface, resulting in issues such as damaged threads. The part qualification rate is very low, the scrap rate is very high, which increases the part processing cost and seriously affects the part output rate. It is also possible to use a drill jig for tapping and then have the fitter machine the threaded hole. However, how to fix the drill jig is a troublesome problem because the part shape is a conical or irregular surface, and the design, positioning, and fixing of the drill jig are very difficult. Utility Model Content

[0005] To address the aforementioned defects or deficiencies, the purpose of this utility model is to provide a threading device for irregularly shaped surfaces, thereby solving the problem of tapping threaded holes on irregularly shaped surfaces, ensuring that the threaded holes are processed according to the drawing requirements, and ensuring that thread quality problems such as damaged threads and misalignment with the threaded bottom hole are not generated during the threading process.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A threading device for threaded holes on irregular surfaces includes: a guide sleeve installed at the end of a machine tool spindle, a movable rotating body disposed inside the guide sleeve, a drill chuck installed at the end of the rotating body, a replaceable tap installed on the drill chuck, and the rotating body being able to move and rotate horizontally along the guide sleeve within the guide sleeve.

[0008] The rotating body is provided with a rotating hole, and a rotating shank for tapping threaded holes is provided inside the rotating hole.

[0009] The rotating body has a wedge-shaped structure at the mounting end of the guide sleeve.

[0010] The guide sleeve is clamped and installed on the angle head of the machine tool.

[0011] The inner diameter of the guide sleeve is larger than the outer diameter of the rotating body, and they have a smooth, small-gap fit.

[0012] The length of the guide sleeve is less than the length of the rotating body.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This invention provides a tapping device for threaded holes on irregular surfaces. By improving the end of the machine tool, it is designed to adjust the horizontal progress and rotation intensity of the rotating body as needed. Depending on the irregular surface, the drill chuck can be positioned at the end of the rotating body for precise tapping. Through actual field processing and multiple experimental verifications, this invention's irregular surface tapping device is simple, convenient, and highly operable. As long as the machine tool can drill, this device can be used for tapping, ensuring the quality of the threaded hole axis and effectively avoiding thread quality problems such as damaged threads. Simultaneously, this device compensates for the limitation of ordinary machine tools in processing irregular threaded holes, expanding the machine tool's process capabilities and ensuring the consistency and reliability of threaded hole processing quality in machine tool parts. Furthermore, this invention can also be applied to tapping threaded holes in confined spaces. Simply adjusting the clamping length of the guide sleeve, or customizing the guide sleeve length according to the actual working conditions, can achieve tapping of threaded holes in complex and narrow spaces. Using this tapping fixture further ensures the quality of parts processing, reduces economic losses in the parts processing process, improves machine tool process capabilities, and enhances parts processing quality and work efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the threaded hole tapping device on the irregular surface of this utility model;

[0016] Figure 2 This is a schematic diagram of the rotating body structure of this utility model.

[0017] In the figure, 1—taper; 2—drill chuck; 3—rotating shank; 4—rotating body; 5—guide sleeve; 41—rotating hole; 42—wedge structure. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0019] For machining threaded holes on irregularly shaped surfaces of parts, threads in good working conditions can be directly drilled and tapped using a machine tool. However, for machining plants with limited space or lacking the capability for five-axis machine tools, the pilot hole is typically machined using an angle head connected to the spindle of a standard 3-axis or 4-axis machine tool. Conventional angle heads do not have tapping capabilities. Figure 1 As shown, this utility model provides a threading device for a threaded hole on an irregular surface, comprising: a guide sleeve 5 installed at the end of a machine tool spindle, a movable rotating body 4 disposed inside the guide sleeve 5, a drill chuck 2 installed at the end of the rotating body 4, a replaceable tap 1 installed on the drill chuck 2, and the rotating body 4 being able to move and rotate horizontally along the guide sleeve 5 within the guide sleeve 5.

[0020] It achieves threading by clamping the tap in a drill chuck and moving it axially, while simultaneously allowing for rotary feed. Similar to the principle of using a drill chuck in radial drills or pliers, if the drill chuck is applied to a universal head, drilling irregular surfaces is easily solved. However, tapping irregular surfaces requires not only that the machine tool feed along the hole axis, but also that the speed and feed rate be synchronized in certain specific ratios for proper tapping; otherwise, the threads may be damaged or missing. Therefore, tapping irregular surfaces necessitates that the universal head can clamp the drill chuck, and secondly, that the tap can feed along the axis of the threaded hole on the irregular surface. This invention utilizes a rotating body 4 that can move horizontally and rotate within a guide sleeve 5, driving the drill chuck 2 to process the threaded hole.

[0021] Specifically, such as Figure 2 As shown, the rotating body 4 is provided with a rotating hole 41, and a rotating shank 3 for tapping threaded holes is provided inside the rotating hole 41. The rotating body 4 has a wedge-shaped structure 42 at the mounting end of the guide sleeve 5. By manually applying an axial force and rotating the rotating shank 3, threaded holes on irregular surfaces can be tapped.

[0022] In this invention, the guide sleeve 5 is clamped and installed on the angle head of the machine tool. The inner diameter of the guide sleeve 5 is larger than the outer diameter of the rotating body 4, and they have a smooth, small-clearance fit. The length of the guide sleeve 5 is less than the length of the rotating body 4.

[0023] The working process of this utility model is as follows:

[0024] The guide sleeve 5 is held by the angle head, and then the straight shank of the rotating body 4 is inserted into the guide sleeve 5. The straight shank of the rotating body 4 can rotate and move freely inside the guide sleeve 5. After the machine tool holder is adjusted to the correct angle, the rotating shank 3 is rotated by hand, and the rotating body 4 moves along the guide sleeve 5 inside the guide sleeve 5. The drill chuck 2 is manually rotated for tapping. The clamping distance of the exposed part of the guide sleeve 5 can be adjusted arbitrarily according to the actual space size to ensure that the tapping is carried out normally.

[0025] This invention solves the tapping problem of threaded holes on irregular surfaces (conical surfaces, inclined surfaces, curved surfaces), ensuring that the threaded holes are machined according to the drawing requirements and preventing thread quality problems such as broken threads and misalignment with the threaded bottom hole during the tapping process; it can even machine threaded holes with any angle to any surface according to the drawing requirements. It solves the bottleneck problem of thread tapping after machining the threaded bottom hole on ordinary three-axis and four-axis machine tools, ensuring that the quality of the threaded hole meets the drawing requirements, improving the machining quality of parts, and reducing the scrap rate of parts.

[0026] It will be apparent to those skilled in the art that the above specific examples are merely preferred embodiments of this utility model. Therefore, any improvements or modifications that those skilled in the art may make to certain parts of this utility model still embody the principles of this utility model and achieve its purpose, and all fall within the scope of protection of this utility model.

Claims

1. A tapping device for threaded holes on irregular surfaces, characterized in that, include: A guide sleeve (5) is installed at the end of the machine tool spindle. A movable rotating body (4) is provided inside the guide sleeve (5). A drill chuck (2) is installed at the end of the rotating body (4). A replaceable tap (1) is installed on the drill chuck (2). The rotating body (4) can move and rotate horizontally along the guide sleeve (5) inside the guide sleeve (5).

2. The thread tapping device for irregularly shaped surfaces according to claim 1, characterized in that, The rotating body (4) is provided with a rotating hole (41), and a rotating shank (3) for tapping the threaded hole is provided in the rotating hole (41).

3. The tapping device for threaded holes on irregular surfaces according to claim 1 or 2, characterized in that, The rotating body (4) has a wedge-shaped structure (42) at the mounting end of the guide sleeve (5).

4. The thread tapping device for irregularly shaped surfaces according to claim 1, characterized in that, The guide sleeve (5) is clamped and installed on the angle head of the machine tool.

5. The thread tapping device for irregularly shaped surfaces according to claim 1, characterized in that, The inner diameter of the guide sleeve (5) is larger than the outer diameter of the rotating body (4), and they are in smooth, small-gap contact.

6. The tapping device for threaded holes on irregular surfaces according to claim 1 or 5, characterized in that, The length of the guide sleeve (5) is less than the length of the rotating body (4).

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