Forming cutter with variable core thickness

Abstract

According to the variable-core-thickness forming tool, the first drill body, the second drill body and the third drill body are arranged in a sectional mode, the core thicknesses of the first drill body, the second drill body and the third drill body are sequentially increased, the rigidity of a drill bit is improved, vibration and bending in the machining process are reduced, chip removal is facilitated, and chip blockage and premature abrasion are avoided; due to the four-edge-strip design, the machining efficiency is improved, the load of a single edge strip is reduced, first cutting edges are arranged at the connecting positions of the first edge strips and the end of the first drill body, each first cutting edge comprises a first edge face and a second edge face, the first edge faces and the second edge faces are connected to form 130 degrees, the second edge faces and the first edge strips are connected to form 90 degrees, and therefore the drill bit is more stable, and the service life of the drill bit is prolonged. The cutting stability and the machining efficiency are improved, good roughness and straightness can be guaranteed, and high hole precision is obtained.

Description

Technical Field

[0001] The present invention relates to the field of precision machining technology, and more specifically, to a variable core thickness forming tool. Background Art

[0002] Cemented carbide cutting tool materials have high hardness, high wear resistance, sufficient strength and toughness, as well as good high temperature heat resistance, chemical stability and thermal conductivity, and are used to manufacture cutting tools, knives, cobalt tools and wear-resistant parts.

[0003] The tool closest to the present application in the prior art is the one with announcement number: CN218396086U, which discloses a deep hole drill with variable core thickness, comprising a deep hole drill body, the deep hole drill body comprising a shank and a blade, the shank and the blade being connected to each other, the blade comprising a back, a main cutting portion, and a chip groove, the rear end of the back extending spirally along the central axis of the deep hole drill body to the shank, the front end of the back extending spirally along the central axis of the deep hole drill body to the main cutting portion, the chip groove extending spirally along the central axis of the deep hole drill body and being arranged between adjacent backs, the chip groove comprising a front chip groove and a rear chip groove, the front chip groove and the rear chip groove being integrally formed.

[0004] The existing variable core thickness deep hole drill only uses the core thickness of the front chip groove to be greater than the rear chip groove to ensure less waste cutting. The cutting efficiency is still low, and it is easy to shake during cutting, which poses a risk of tool breakage.

[0005] In view of this, the present invention proposes a segmented, high-cutting-efficiency, and variable-core-thickness forming tool. Summary of the invention

[0006] The purpose of the present invention is to provide a segmented, high-cutting-efficiency, variable-core-thickness forming tool.

[0007] A variable core thickness forming tool comprises a shank 1, a first drill body 2, a second drill body 3, and a third drill body 4. The first drill body 2, the second drill body 3, and the third drill body 4 are arranged on the side of the shank 1 in sequence. The feature is that the core thicknesses of the first drill body 2, the second drill body 3, and the third drill body 4 increase in sequence. Four first cutting edges 5 are arranged at intervals on the side of the first drill body 2. A first cutting edge 6 is arranged at the connection between the first cutting edge 5 and the end of the first drill body 2. The first cutting edge 6 comprises a first cutting edge face 61 and a second cutting edge face 62. The first cutting edge face 61 and the second cutting edge face 62 are connected to form a 130° angle, and the second cutting edge face 62 is connected to the first cutting edge face 5 to form a 90° angle, so that it is more stable.

[0008] In some embodiments, a first step 7 is formed at the connection between the first drill body 2 and the second drill body 3, and the angle of the first step 7 is 90°.

[0009] In some embodiments, a second step 8 is formed at the connection between the second drill body 3 and the third drill body 4, and the angle of the second step 8 is 45° upward.

[0010] In some embodiments, a first anti-interference surface 63 is further provided between each first edge band 5 and the second edge surface 62 to prevent collision during processing.

[0011] In some embodiments, the angle between the first edge 5 and the first drill body 2 is 15°.

[0012] Furthermore, the width of the first edge band 5 is 0.2 mm.

[0013] In some embodiments, four second edge bands 9 are spaced apart on the side of the second drill body 3 , and second cutting edges 12 are disposed at the ends of the first edge band 5 and the first step 7 .

[0014] Furthermore, the width of the second edge band 9 is 0.25 mm.

[0015] In some embodiments, a chip removal groove 10 is spirally provided on the side between the first drill body 2 , the second drill body 3 , the third drill body 4 and the shank 1 .

[0016] Furthermore, an inner cooling hole 11 is provided near the end of the shank 1 of the chip removal groove 10, and the inner cooling hole 11 is used for cooling the tool.

[0017] Beneficial effects of the present invention: The present invention proposes a variable core thickness forming tool, which is arranged in sections, a first drill body 2, a second drill body 3, and a third drill body 4, and the core thicknesses of the first drill body 2, the second drill body 3, and the third drill body 4 are successively increased, thereby improving the rigidity of the drill bit, reducing vibration and bending during the processing, facilitating chip removal, and avoiding chip blockage and premature wear. Four first blade bands 5 are arranged at intervals on the side of the first drill body 2. The four-blade design improves processing efficiency and reduces the load on a single blade band. A first cutting edge 6 is provided at the connection between the first blade band 5 and the end of the first drill body 2. The first cutting edge 6 includes a first blade face 61 and a second blade face 62. The first blade face 61 is connected to the second blade face 62 to form a 130° angle, and the second blade face 62 is connected to the first blade face 5 to form a 90° angle, making it more stable, improving cutting stability and processing efficiency, and ensuring good roughness and straightness to obtain higher hole accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A side view of a variable core thickness forming tool of the present application.

[0019] Figure 2 This is a three-dimensional diagram of a variable core thickness forming tool of the present application.

[0020] Main component symbols

[0021] Shank 1, first drill body 2, second drill body 3, third drill body 4, first edge band 5, first cutting edge 6, first edge face 61, second edge face 62, first anti-interference surface 63, first step 7, second step 8, second edge band 9, chip groove 10, internal cooling hole 11, second cutting edge 12.

[0022] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0023] The following examples are described to assist the understanding of the present application, and the examples are not and should not be interpreted in any way as limiting the scope of protection of the present application.

[0024] In the following description, those skilled in the art will recognize that throughout this discussion, components may be described as separate functional units (which may include sub-units), but those skilled in the art will recognize that various components or portions thereof may be divided into separate components or may be integrated together (including within a single system or component).

[0025] At the same time, the connections between components or systems are not intended to be limited to direct connections, rather, the data between these components may be modified, reformatted, or otherwise changed by intermediate components. In addition, additional or fewer connections may be used. It should also be noted that the terms "coupled," "connected," or "input" should be understood to include direct connections, indirect connections through one or more intermediate devices, and wireless connections. Embodiment 1:

[0026] like Figure 1 As shown, it is a side view of a variable core thickness forming tool of the present application; Figure 2 Shown is a three-dimensional diagram of a variable core thickness forming tool of the present application.

[0027] A variable core thickness forming tool comprises a shank 1, a first drill body 2, a second drill body 3, and a third drill body 4. The first drill body 2, the second drill body 3, and the third drill body 4 are arranged on the side of the shank 1 in sequence. The feature is that the core thicknesses of the first drill body 2, the second drill body 3, and the third drill body 4 increase in sequence. Four first cutting edges 5 are arranged at intervals on the side of the first drill body 2. A first cutting edge 6 is arranged at the connection between the first cutting edge 5 and the end of the first drill body 2. The first cutting edge 6 comprises a first cutting edge face 61 and a second cutting edge face 62. The first cutting edge face 61 and the second cutting edge face 62 are connected to form a 130° angle, and the second cutting edge face 62 is connected to the first cutting edge face 5 to form a 90° angle, so that it is more stable.

[0028] A first step 7 is formed at the connection between the first drill body 2 and the second drill body 3, and the angle of the first step 7 is 90°.

[0029] A second step 8 is formed at the connection between the second drill body 3 and the third drill body 4. The second step 8 has an upward angle of 45°.

[0030] A first anti-interference surface 63 is also provided between each first edge band 5 and the second edge surface 62 to prevent collision during processing.

[0031] The angle between the first edge 5 and the first drill body 2 is 15°.

[0032] The first land 5 has a width of 0.2 mm.

[0033] Four second edge bands 9 are spaced apart on the side of the second drill body 3 , and second cutting edges 12 are disposed at the ends of the first edge band 5 and the first step 7 .

[0034] The second land 9 has a width of 0.25 mm.

[0035] Chip removal grooves 10 are spirally arranged on the sides between the first drill body 2 , the second drill body 3 , the third drill body 4 and the shank 1 .

[0036] Furthermore, an inner cooling hole 11 is provided near the end of the shank 1 of the chip removal groove 10, and the inner cooling hole 11 is used for cooling the tool.

[0037] Beneficial effects of the present invention: The present invention proposes a variable core thickness forming tool, which is arranged in sections, a first drill body 2, a second drill body 3, and a third drill body 4, and the core thicknesses of the first drill body 2, the second drill body 3, and the third drill body 4 are successively increased, thereby improving the rigidity of the drill bit, reducing vibration and bending during the processing, facilitating chip removal, and avoiding chip blockage and premature wear. Four first blade bands 5 are arranged at intervals on the side of the first drill body 2. The four-blade design improves processing efficiency and reduces the load on a single blade band. A first cutting edge 6 is provided at the connection between the first blade band 5 and the end of the first drill body 2. The first cutting edge 6 includes a first blade face 61 and a second blade face 62. The first blade face 61 is connected to the second blade face 62 to form a 130° angle, and the second blade face 62 is connected to the first blade face 5 to form a 90° angle, making it more stable, improving cutting stability and processing efficiency, and ensuring good roughness and straightness to obtain higher hole accuracy.

[0038] Although the present application has disclosed multiple aspects and embodiments, other aspects and embodiments will be obvious to those skilled in the art, and several modifications and improvements may be made without departing from the concept of the present application, all of which belong to the protection scope of the present application. The multiple aspects and embodiments disclosed in the present application are only for illustration and are not intended to limit the present application. The actual protection scope of the present application shall be subject to the claims.

Claims

1. A variable core thickness forming tool, comprising a handle (1), a first drill body (2), a second drill body (3), and a third drill body (4), wherein the first drill body (2), the second drill body (3), and the third drill body (4) are sequentially arranged on the side of the handle (1), characterized in that: The core thicknesses of the first drill body (2), the second drill body (3) and the third drill body (4) increase in sequence. Four first edge bands (5) are arranged at intervals on the side of the first drill body (2). A first cutting edge (6) is arranged at the connection between the first edge band (5) and the end of the first drill body (2). The first cutting edge (6) comprises a first edge face (61) and a second edge face (62). The first edge face (61) and the second edge face (62) are connected to form an angle of 130 degrees, and the second edge face (62) and the first edge band (5) are connected to form a angle of 90 degrees.

2. The variable core thickness forming tool according to claim 1, characterized in that: A first step (7) is formed at the connection between the first drill body (2) and the second drill body (3), and the angle of the first step (7) is 90°.

3. The variable core thickness forming tool according to claim 1, characterized in that: A second step (8) is formed at the connection between the second drill body (3) and the third drill body (4), and the second step (8) has an upward angle of 45°.

4. The variable core thickness forming tool according to claim 1, characterized in that: A first anti-interference surface (63) is also provided between each first edge band (5) and the second edge surface (62) to prevent collision during processing.

5. The variable core thickness forming tool according to claim 1, characterized in that: The angle between the first edge band (5) and the first drill body (2) is 15°.

6. The variable core thickness forming tool according to claim 1, characterized in that: The first edge band (5) has a width of 0.2 mm.

7. The variable core thickness forming tool according to claim 1, characterized in that: Four second edge bands (9) are arranged at intervals on the side of the second drill body (3), and a second cutting edge 12 is arranged at the end of the first edge band (5) and the first step (7).

8. The variable core thickness forming tool according to claim 1, characterized in that: The second edge band (9) has a width of 0.25 mm.

9. The variable core thickness forming tool according to claim 1, characterized in that: Chip removal grooves (10) are spirally provided on the sides between the first drill body (2), the second drill body (3), the third drill body (4) and the shank (1).

10. The variable core thickness forming tool according to claim 1, characterized in that: An inner cooling hole (11) is provided at the end of the chip removal groove (10) close to the shank (1), and the inner cooling hole (11) is used to cool the tool.

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