Inner cooling type twist drill with high chip removal capacity

Abstract

The utility model relates to the technical field of twist drills, and discloses an inner-cooled twist drill with high chip removal capacity, which solves the problem that the existing inner-cooled twist drill is poor in chip removal capacity, and comprises a mounting head and a drill rod, and a first cutting edge, a second cutting edge and a third cutting edge are arranged at one end, far away from the mounting head, of the drill rod. A first chip groove, a second chip groove and a third chip groove are formed among the first cutting edge, the second cutting edge and the third cutting edge, and extend to one end close to the mounting head along the outer side edge of the drill rod; a first inner cooling flow channel, a second inner cooling flow channel and a third inner cooling flow channel are formed in the first cutting edge, the second cutting edge and the third cutting edge correspondingly and extend to the end close to the mounting head along the interior of the drill rod; by means of the inner cooling type twist drill, the chip removal capacity can be improved, and meanwhile the installation sealing performance can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of twist drills, and particularly relates to an internal cooling twist drill with high chip removal capacity. Background Art

[0002] A twist drill is a tool for drilling circular holes in a workpiece by rotating and cutting relative to its fixed axis. It is named after its spiral-shaped chip flute, which resembles a twist of hemp. Most of the currently used internal cooling twist drills usually have a two-edge design, and there are only two internal cooling channels inside. This design results in a small feed rate and is not suitable for cutting workpieces made of harder materials. There are only two chip removal grooves on its surface, which further causes poor chip removal ability. In addition, the existing internal cooling twist drill body usually does not have auxiliary sealing components, and there will be chip coolant leakage during use, resulting in poor use effect. Therefore, this application proposes an internal cooling twist drill with high chip removal capacity. Summary of the Utility Model

[0003] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides an internal cooling twist drill with high chip removal capacity, effectively solving the problem of poor chip removal capacity of the existing internal cooling twist drill.

[0004] To achieve the above object, the utility model provides the following technical solution: An internal cooling twist drill with high chip removal capacity, including a mounting head and a drill rod. The drill rod is fixedly connected to one end of the mounting head. A first cutting edge, a second cutting edge, and a third cutting edge are provided at the end of the drill rod away from the mounting head. A first chip removal groove, a second chip removal groove, and a third chip removal groove are formed between the first cutting edge, the second cutting edge, and the third cutting edge. The first chip removal groove, the second chip removal groove, and the third chip removal groove extend along the outer side of the drill rod to the end close to the mounting head. First internal cooling channels, second internal cooling channels, and third internal cooling channels are respectively formed inside the first cutting edge, the second cutting edge, and the third cutting edge. The first internal cooling channel, the second internal cooling channel, and the third internal cooling channel extend along the inside of the drill rod to the end close to the mounting head.

[0005] Preferably, the first chip removal groove, the second chip removal groove, and the third chip removal groove are all spiral structures, and the first internal cooling channel, the second internal cooling channel, and the third internal cooling channel are all spiral structures.

[0006] Preferably, the angle between the first cutting edge, the second cutting edge, and the third cutting edge is 120 degrees.

[0007] Preferably, the mounting head is composed of a connecting head and a buffer connecting section. The buffer connecting section is fixedly connected between the connecting head and the drill rod, and the bottom end of the buffer connecting section is an arc structure.

[0008] Preferably, a plurality of liquid inlet holes communicating with the first internal cooling channel, the second internal cooling channel and the third internal cooling channel are provided at the top end of the connector, and a flat groove is provided on the side of the connector.

[0009] Preferably, a first annular groove is provided on the side of the top end of the connector, and a first O-ring seal is provided inside the first annular groove.

[0010] Preferably, a second annular groove is provided on the side of the top end of the buffer connection section, and a second O-ring seal is provided inside the second annular groove.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] (1) During operation, by providing the first cutting edge, the second cutting edge and the third cutting edge, the feed rate can be increased, which is more suitable for cutting workpieces made of harder materials. By providing the first chip removal groove, the second chip removal groove, the third chip removal groove, the first internal cooling channel, the second internal cooling channel and the third internal cooling channel, the chip removal ability can be improved, and the use effect can be enhanced.

[0013] (2) By providing the flat groove, the installation stability can be improved. By providing the first annular groove, the first O-ring seal, the second annular groove and the second O-ring seal, the connection tightness can be improved, avoiding the leakage of cutting fluid. By providing the buffer connection section with an arc-shaped bottom structure, the metal chips can be dispersed and discharged, avoiding the impact of metal chips on the drill bit connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model.

[0015] In the drawings:

[0016] Figure 1 is a schematic structural diagram of an internal cooling type twist drill with high chip removal ability of the present utility model;

[0017] Figure 2 is a partial structural schematic diagram of an internal cooling type twist drill with high chip removal ability of the present utility model;

[0018] Figure 3 is for the present utility model Figure 2 partial enlarged view;

[0019] Figure 4 is a schematic structural diagram of the installation head of the present utility model;

[0020] In the figure: 1. Mounting head; 2. Drill pipe; 3. First cutting edge; 4. Second cutting edge; 5. Third cutting edge; 6. First chip removal groove; 7. Second chip removal groove; 8. Third chip removal groove; 9. First internal cooling channel; 10. Second internal cooling channel; 11. Third internal cooling channel; 12. Connector; 13. Buffer connection section; 14. Liquid inlet hole; 15. Flat groove; 16. First annular groove; 17. First O-ring; 18. Second annular groove; 19. Second O-ring. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] As shown by Figures 1 to 3 A high-chip-removal-capacity internal-cooling twist drill of the present invention includes a mounting head 1 and a drill pipe 2. The drill pipe 2 is fixedly connected to one end of the mounting head 1. A first cutting edge 3, a second cutting edge 4, and a third cutting edge 5 are provided at one end of the drill pipe 2 away from the mounting head 1. A first chip removal groove 6, a second chip removal groove 7, and a third chip removal groove 8 are formed between the first cutting edge 3, the second cutting edge 4, and the third cutting edge 5. The first chip removal groove 6, the second chip removal groove 7, and the third chip removal groove 8 extend along the outer side of the drill pipe 2 to one end close to the mounting head 1. First internal cooling channels 9, 10, and 11 are respectively opened inside the first cutting edge 3, the second cutting edge 4, and the third cutting edge 5. The first internal cooling channels 9, 10, and 11 extend along the inside of the drill pipe 2 to one end close to the mounting head 1. The first chip removal groove 6, the second chip removal groove 7, and the third chip removal groove 8 are all spiral structures. The first internal cooling channels 9, 10, and 11 are all spiral structures. The included angle between the first cutting edge 3, the second cutting edge 4, and the third cutting edge 5 is 120 degrees;

[0023] Through the design of the first cutting edge 3, the second cutting edge 4, and the third cutting edge 5, the cutting feed amount can be increased, the drill can be adapted to cut workpieces with harder materials, and the adaptability can be improved. Through the design of the first chip removal groove 6, the second chip removal groove 7, and the third chip removal groove 8 and the design of the first internal cooling channels 9, 10, and 11, the cooling effect can be improved, and at the same time, the chip removal capacity can be improved;

[0024] As shown by Figures 1 to 4It is given that the mounting head 1 is composed of a connector 12 and a buffer connector 13, the buffer connector 13 is fixedly connected between the connector 12 and the drill pipe 2, the bottom end of the buffer connector 13 is an arc-shaped structure, the top of the connector 12 is provided with a plurality of liquid inlet holes 14 connected with the first inner cold runner 9, the second inner cold runner 10 and the third inner cold runner 11, the side of the connector 12 is provided with a flat groove 15, the side of the top of the connector 12 is provided with an annular groove 16, the inside of the annular groove 16 is provided with an O-ring 17, the side of the top of the buffer connector 13 is provided with an annular groove 2 18, the inside of the annular groove 2 18 is provided with an O-ring 2 19;

[0025] The buffer connection section 13 can guide the strip-shaped metal scraps so that the strip-shaped metal scraps are dispersed and discharged, thereby preventing the strip-shaped metal scraps from impacting the equipment mounting seat. The flat groove 15 can improve the stability of the connection, and the O-ring 17 and the O-ring 2 19 can improve the sealing of the connection to avoid leakage of the cutting fluid.

[0026] During operation, by providing a first cutting edge, a second cutting edge and a third cutting edge, the feed rate can be increased, and it is more suitable for cutting workpieces of harder materials. By providing a first chip groove, a second chip groove, a third chip groove, a first internal cooling channel, a second internal cooling channel and a third internal cooling channel, the chip removal capacity can be improved and the use effect can be improved. By providing a flat groove, the stability of the installation can be improved. By providing an annular groove one, an O-ring one, an annular groove two and an O-ring two, the sealing of the connection can be improved to avoid leakage of the cutting fluid. By providing a buffer connection section with an arc-shaped structure at the bottom, the metal chips can be dispersed and exported to avoid metal chips impacting the drill bit connection seat.

Claims

1. An internally cooled twist drill with high chip removal capability, comprising a mounting head (1) and a drill rod (2), characterized in that: The drill rod (2) is fixedly connected to one end of the mounting head (1); a first cutting edge (3), a second cutting edge (4) and a third cutting edge (5) are provided at the end of the drill rod (2) away from the mounting head (1); a first chip groove (6), a second chip groove (7) and a third chip groove (8) are formed between the first cutting edge (3), the second cutting edge (4) and the third cutting edge (5); the first chip groove (6), the second chip groove (7) and the third chip groove (8) extend along the outer side of the drill rod (2) to the end close to the mounting head (1); a first inner cooling channel (9), a second inner cooling channel (10) and a third inner cooling channel (11) are respectively provided inside the first cutting edge (3), the second cutting edge (4) and the third cutting edge (5); the first inner cooling channel (9), the second inner cooling channel (10) and the third inner cooling channel (11) extend along the inside of the drill rod (2) to the end close to the mounting head (1).

2. The internally cooled twist drill with high chip removal capability according to claim 1, characterized in that: The first chip removal groove (6), the second chip removal groove (7) and the third chip removal groove (8) are all spiral structures, and the first internal cooling channel (9), the second internal cooling channel (10) and the third internal cooling channel (11) are all spiral structures.

3. The internally cooled twist drill with high chip removal capability according to claim 1, characterized in that: The angle between the first cutting edge (3), the second cutting edge (4) and the third cutting edge (5) is 120 degrees.

4. The internally cooled twist drill with high chip removal capability according to claim 1, characterized in that: The installation head (1) is composed of a connecting head (12) and a buffer connecting section (13); the buffer connecting section (13) is fixedly connected between the connecting head (12) and the drill rod (2); and the bottom end of the buffer connecting section (13) is an arc-shaped structure.

5. The internally cooled twist drill with high chip removal capability according to claim 4, characterized in that: The top of the connector (12) is provided with a plurality of liquid inlet holes (14) connected with the first inner cooling channel (9), the second inner cooling channel (10) and the third inner cooling channel (11), and the side of the connector (12) is provided with a flat groove (15).

6. The internally cooled twist drill with high chip removal capability according to claim 4, characterized in that: An annular groove (16) is provided on the side edge of the top end of the connector (12), and an O-type sealing ring (17) is provided inside the annular groove (16).

7. The internally cooled twist drill with high chip removal capability according to claim 4, characterized in that: A second annular groove (18) is provided on the side edge of the top end of the buffer connection section (13), and a second O-type sealing ring (19) is provided inside the second annular groove (18).

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