An internal threading tool

Abstract

This utility model belongs to the field of metal cutting tool technology, specifically an internal thread cutting tool, including a tool shank. One end of the tool shank, near the tail end, has an annular retraction groove. A conical cutting head is fixedly connected to one end of the tool shank, away from the annular retraction groove. The surface of the conical cutting head has a spiral chip removal groove, and a spiral cutting edge is fixedly attached to the surface of the conical cutting head. The tool shank provides a connection base for the conical cutting head, ensuring stable operation. The conical cutting head distributes the cutting force from the front end to the rear end, reducing pressure at the front end and providing a buffer for the operation of the conical cutting head. The spiral chip removal groove provides a spiral direction for chip removal, transitioning from the front to the rear end of the conical cutting head to avoid chip accumulation. The spiral cutting edge and spiral design make the chip removal process smooth, improving chip removal efficiency and accelerating chip removal time. The annular retraction groove provides retraction space.

Description

Technical Field

[0001] This utility model belongs to the field of metal cutting tool technology, specifically an internal threading tool. Background Technology

[0002] Internal threading tools are the core tools for machining internal threads in mechanical manufacturing, and their applications cover multiple fields such as general machinery, automotive industry, aerospace, petrochemicals, and electronic equipment.

[0003] The cutting edge of the traditional straight groove internal thread cutting part is an instantaneous full tooth cut, the cutting force is concentrated, and it is easy to generate impact vibration, which leads to tool edge breakage and short tool life. Therefore, an internal thread cutting tool is proposed to address the above problems. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, this utility model proposes an internal thread cutting tool.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: The internal thread cutting tool of this utility model includes a tool shank, one end of which is provided with an annular retraction groove near the end of the tool edge, and a conical cutting head is fixedly connected to one end of the tool shank and the other end away from the annular retraction groove. The surface of the conical cutting head is provided with a spiral chip removal groove, and a spiral cutting edge is fixedly connected to the surface of the conical cutting head.

[0006] Preferably, the conical cutter head has an internal cooling hole at its center, and a rectangular handle is fixedly connected to one end of the cutter bar and the end furthest from the conical cutter head.

[0007] Preferably, the spiral cutting blade adopts a variable spiral angle design.

[0008] Preferably, the surface of the conical cutter head is coated with a titanium-aluminum-nitrogen coating, the surface of the spiral cutting edge is coated with a titanium-aluminum-nitrogen coating, and the interior of the annular retraction groove is coated with a molybdenum disulfide coating.

[0009] Preferably, the inner wall of the internal cooling hole is coated with an anti-corrosion coating.

[0010] The beneficial effects of this utility model are:

[0011] 1. This utility model provides an internal thread cutting tool, which provides space for tool retraction by setting an annular retraction groove, and uses a conical cutting head in conjunction with a spiral cutting edge to fit the spiral trajectory of the thread, resulting in smooth cutting, improved thread machining accuracy and surface quality, and extended tool life.

[0012] 2. This utility model provides an internal thread cutting tool. By setting an anti-corrosion coating on the inner wall of the internal cooling hole, it prevents long-term placement of high-pressure coolant from corroding the internal cooling hole, which would affect the use of the tapered cutting head and increase the service life of the tapered cutting tool. By setting a spiral chip removal groove, it efficiently removes chips and prevents chip accumulation. Attached Figure Description

[0013] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0014] Figure 1 This is a perspective view of the present invention;

[0015] Figure 2 This is a side view of the present invention;

[0016] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle.

[0017] Legend:

[0018] 1. Tool holder; 2. Tapered tool head; 3. Spiral chip removal groove; 4. Spiral cutting edge; 5. Internal cooling hole; 6. Rectangular tool holder; 7. Annular relief groove. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0020] Specific implementation examples are given below.

[0021] Please see Figure 1 - Figure 3This utility model provides an internal thread cutting tool, including a tool holder 1. One end of the tool holder 1 is provided with an annular retraction groove 7 near the end of the tool. A conical cutting head 2 is fixedly connected to one end of the tool holder 1 and the other end away from the annular retraction groove 7. The surface of the conical cutting head 2 is provided with a spiral chip removal groove 3, and a spiral cutting edge 4 is fixedly connected to the surface of the conical cutting head 2. By setting the tool holder 1, a connection base is provided for the conical cutting head 2, ensuring stable operation. By setting the conical cutting head 2, the cutting weight is distributed from the front end to the rear end, reducing the pressure at the front end and providing a buffer for the operation of the conical cutting head 2, preventing the conical cutting head 2 from breaking. By setting the spiral chip removal groove 3, a spiral direction is provided for the chip discharge, transitioning from the front end to the rear end of the conical cutting head 2, which can push the chips more smoothly out of the spiral chip removal groove 3 and avoid accumulation. By setting the spiral cutting edge 4, the spiral design makes the chip process smooth, improves chip removal efficiency, and speeds up chip removal time. By setting the annular retraction groove 7, retraction space is provided.

[0022] Specifically, the conical cutter head 2 has an internal cooling hole 5 at its center, and a rectangular handle 6 is fixedly connected to one end of the cutter shank 1 and the end away from the conical cutter head 2. By setting the internal cooling hole 5, high-pressure coolant can be directly introduced into the area of ​​the spiral cutting blade 4 to cool the spiral cutting blade 4, avoid high temperature damage to the spiral cutting blade 4, and increase its service life. By setting the rectangular handle 6, the positioning is accurate, the structure is simple, and it is easy to use.

[0023] Specifically, the spiral cutting blade 4 adopts a variable spiral angle design. By setting the spiral cutting blade 4, the small spiral angle at the front end can reduce the tension at the beginning of cutting, avoiding the spiral cutting blade 4 from breaking due to excessive tension in the early stage of tapping. The large spiral angle at the rear end increases the radial support force, counteracts the expansion trend at the front end, and improves the chip cutting efficiency of the spiral cutting blade 4.

[0024] Specifically, the surface of the conical cutter head 2 is coated with titanium aluminum nitrogen, the surface of the spiral cutting blade 4 is coated with titanium aluminum nitrogen, and the interior of the annular relief groove 7 is coated with molybdenum disulfide. By setting the titanium aluminum nitrogen coating on the surface of the conical cutter head 2, friction with the inner wall of the pre-made hole can be reduced, avoiding wear or scratches on the surface of the conical cutter head 2 due to friction, thus ensuring accuracy. By setting the molybdenum disulfide coating inside the annular relief groove 7, it resists the severe friction and impact during the cutting process, avoids accumulation, and reduces wear.

[0025] Specifically, the inner wall of the internal cooling hole 5 is coated with an anti-corrosion coating. By setting the anti-corrosion coating on the inner wall of the internal cooling hole 5, the corrosion of the internal cooling hole 5 by the long-term placement of high-pressure coolant is prevented, which would affect the use of the tapered cutter head 2 and increase the service life of the tapered cutter head 2.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A female tool comprising a tool shank (1), characterized in that: The blade holder (1) has an annular retraction groove (7) near the blade tail at one end. A conical blade head (2) is fixedly connected to one end of the blade holder (1) and the other end away from the annular retraction groove (7). A spiral chip removal groove (3) is provided on the surface of the conical blade head (2). A spiral cutting blade (4) is fixedly connected to the surface of the conical blade head (2).

2. A female tool according to claim 1, characterized in that: The conical cutter head (2) has an internal cooling hole (5) at its center, and a rectangular handle (6) is fixedly connected to one end of the cutter bar (1) and the end away from the conical cutter head (2).

3. A female tool according to claim 1, characterized in that: The spiral cutting blade (4) adopts a variable spiral angle design.

4. A female tool according to claim 1, characterized in that: The surface of the conical cutter head (2) is coated with titanium aluminum nitrogen, the surface of the spiral cutting blade (4) is coated with titanium aluminum nitrogen, and the interior of the annular retraction groove (7) is coated with molybdenum disulfide.

5. A female tool according to claim 2, characterized in that: The inner wall of the internal cooling hole (5) is coated with an anti-corrosion coating.

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