Blind rivet positioning structure of BT type knife handle

Abstract

The utility model discloses a BT type knife handle pop-rivet positioning structure, which relates to the technical field of numerical control milling machines and comprises a taper shank and a pop-rivet structure, a pop-rivet hole is arranged on one side of the taper shank, a taper hole is arranged on the side surface of the taper shank and at one end of the pop-rivet hole, and the pop-rivet structure consists of a pop-rivet front end, a pop-rivet middle part, a pop-rivet taper part and a pop-rivet tail end. The tail end of the blind rivet front end is fixedly connected with the blind rivet middle part, the tail end of the blind rivet middle part is fixedly connected with the blind rivet conical part, and the blind rivet positioning structure of the BT type knife handle has the advantages that the blind rivet hole, the conical hole and the blind rivet conical part are matched with one another, so that the tool connection rigidity is improved, the vibration during high-speed cutting is reduced, the connection precision is improved, and the machining quality is ensured; the service life of the tool is prolonged, connection looseness caused by abrasion is reduced, the structure is simple, and machining and implementation are easy.

Description

Technical Field

[0001] This utility model relates to the field of CNC milling machine technology, specifically to a BT-type tool holder pull pin positioning structure. Background Technology

[0002] The BT interface is an internationally recognized standard for spindle taper shanks, achieving rapid tool positioning and high-precision torque transmission through a 7:24 taper fit. However, existing BT interface technology has the following shortcomings:

[0003] 1. Insufficient connection rigidity can easily cause vibration during high-speed cutting, affecting machining accuracy;

[0004] 2. The fit between the rivet hole and the tapered shank requires high precision and is difficult to machine;

[0005] 3. After prolonged use, the rivet holes are prone to wear, which can cause the tool connections to loosen.

[0006] Based on the above-mentioned shortcomings, a BT-type tool holder pull stud positioning structure is proposed. Utility Model Content

[0007] To address the shortcomings of existing technologies, this utility model provides a BT-type tool holder pull pin positioning structure, which solves the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a BT-type tool holder pull pin positioning structure, comprising a tapered shank and a pull pin structure. A pull pin hole is provided on one side of the tapered shank, and a tapered hole is provided on the side of the tapered shank at one end of the pull pin hole. The pull pin structure consists of a pull pin front end, a pull pin middle part, a pull pin cone part, and a pull pin end. The pull pin front end is fixedly connected to the pull pin middle part, the pull pin middle part is fixedly connected to the pull pin cone part, and the pull pin cone part is fixedly connected to the pull pin end. The pull pin structure is inserted into the pull pin hole, and the outer side of the pull pin cone part mates with the inner cavity of the cone hole. The tapered shank is BT-type 7:24.

[0009] Preferably, the length of the conical hole is 13cm.

[0010] Preferably, the taper of the conical hole is 1:15, and the taper of the rivet cone is consistent with the taper of the conical hole.

[0011] Preferably, the angle between the tapered hole and the tapered surface of the pull stud is α = 3°49'6".

[0012] Preferably, the length of the tapered portion of the pull stud is 11 cm.

[0013] This utility model provides a BT-type tool holder pull stud positioning structure, which has the following beneficial effects:

[0014] This BT-type tool holder pull stud positioning structure improves the rigidity of the tool connection, reduces vibration during high-speed cutting, enhances connection accuracy, ensures machining quality, extends tool life, reduces connection loosening due to wear, and has a simple structure that is easy to manufacture and implement. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the pull stud structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the tapered handle structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the overall connection structure of this utility model.

[0019] In the diagram: 1. Tapered shank; 2. Pull rivet hole; 3. Tapered hole; 4. Pull rivet front end; 5. Pull rivet middle; 6. Pull rivet tapered part; 7. Pull rivet end; 8. Pull rivet structure. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Please see Figures 1 to 4 This utility model provides a technical solution: a BT-type tool holder pull pin positioning structure, including a tapered shank 1 and a pull pin structure 8. A pull pin hole 2 is provided on one side of the tapered shank 1, and a tapered hole 3 is provided on the side of the tapered shank 1 at one end of the pull pin hole 2. The pull pin structure 8 is composed of a pull pin front end 4, a pull pin middle part 5, a pull pin cone part 6, and a pull pin end 7. The pull pin middle part 5 is fixedly connected to the end of the pull pin front end 4, the pull pin cone part 6 is fixedly connected to the end of the pull pin middle part 5, and the pull pin end 7 is fixedly connected to the end of the pull pin cone part 6. The pull pin structure 8 is inserted into the pull pin hole 2, and the outer side of the pull pin cone part 6 cooperates with the inner cavity of the tapered hole 3. The tapered shank 1 is BT-type 7:24.

[0022] The length of the conical hole 3 is 13cm.

[0023] The taper of the conical hole 3 is 1:15, and the taper of the rivet cone 6 is the same as the taper of the conical hole 3.

[0024] The conical surface fitting angle of conical hole 3 is α = 3°49'6".

[0025] The length of the taper part 6 of the pull stud is 11cm.

[0026] In summary, when using this BT-type tool holder pull stud positioning structure, one end 7 of the pull stud structure 8 is inserted into the pull stud hole 2, and the taper hole 3 engages with the taper part 6 of the pull stud. Since the taper of the taper part 6 and the taper of the taper hole 3 are the same (1:15), a tight fit is ensured. Because the taper angle between the taper part 6 and the taper hole 3 is α=3°49'6", the taper positioning improves the repeatability accuracy compared to cylindrical positioning. When the pull stud hole 2 and the taper hole 3 are opened on the taper shank 1, a high-precision grinding process is used to ensure the accuracy of the taper and the surface finish.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A BT type shank pull pin positioning structure, characterized in that: Including taper handle (1) and pull pin structure (8), one side of the taper handle (1) is provided with a pull pin hole (2), the side of the taper handle (1) and one end of the pull pin hole (2) are provided with a taper hole (3), the pull pin structure (8) is composed of a pull pin front end (4), a pull pin middle part (5), a pull pin taper part (6) and a pull pin tail end (7), the tail end of the pull pin front end (4) is fixedly connected with the pull pin middle part (5), the tail end of the pull pin middle part (5) is fixedly connected with the pull pin taper part (6), the tail end of the pull pin taper part (6) is fixedly connected with the pull pin tail end (7), the pull pin structure (8) is inserted into the pull pin hole (2), the outer side of the pull pin taper part (6) is matched with the inner cavity of the taper hole (3), the taper handle (1) is BT type 7:

24.

2. The BT-type shank pull stud positioning structure according to claim 1, characterized in that: The length of the taper hole (3) is 13 cm.

3. The BT shank pull stud positioning structure of claim 1, wherein: The taper of the taper hole (3) is 1:15, and the taper of the pull pin taper part (6) is consistent with the taper of the taper hole (3).

4. The BT-type shank pull stud positioning structure according to claim 1, wherein: The taper surface cooperation angle of the taper hole (3) and the pull pin taper part (6) is α=3°49'6".

5. The BT-type shank pull stud positioning structure according to claim 1, wherein: The length of the pull pin taper part (6) is 11 cm.

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