External cooling drill bit

Abstract

The utility model discloses an external cooling drill bit, and belongs to the field of hole machining tools. The handle part is connected with one end of the cutting part; the chip removal groove and the first cooling groove are formed in the cutting part, and the first cooling groove is communicated with the interior of the chip removal groove; the chip breaker groove, the second cooling groove and the cutting edge are all formed in the other end of the cutting part, the chip breaker groove, the chip removal groove and the first cooling groove are all communicated, the second cooling groove, the chip breaker groove and the chip removal groove are all communicated, and the cutting edge is communicated with the chip breaker groove. The utility model has the technical effect that the cooling liquid at the cutting edge can continuously flow conveniently.

Description

Technical Field

[0001] The utility model relates to a hole processing tool, in particular to an external cooling drill bit. Background Art

[0002] An external cooling drill bit is a hole processing tool that uses external cooling, has the advantage of facilitating hole processing, and is widely used in the field of hole processing.

[0003] However, after the related external cooling drill bit drills to a certain depth, due to the blockage of waste chips, it is easy to cause the coolant at the cutting edge to be difficult to flow continuously, resulting in the heat of the cutting edge not being able to be taken away by the coolant, and then causing the temperature of the cutting edge to continue to rise, and even affecting the service life of the related external cooling drill bit. Summary of the Utility Model

[0004] Purpose of the Utility Model: The purpose of the utility model is to provide an external cooling drill bit, which facilitates the continuous flow of the coolant at the cutting edge.

[0005] Technical Solution: An external cooling drill bit includes:

[0006] A cutting part;

[0007] A shank part connected to one end of the cutting part;

[0008] A chip removal groove and a first cooling groove both provided in the cutting part, and the first cooling groove communicates with the chip removal groove;

[0009] A chip breaking groove, a second cooling groove and a cutting edge all provided at the other end of the cutting part, the chip breaking groove communicates with the chip removal groove and the first cooling groove, the second cooling groove communicates with the chip breaking groove and the chip removal groove, and the cutting edge communicates with the chip breaking groove.

[0010] Optionally, it further includes:

[0011] A flank face provided at the other end of the cutting part;

[0012] A third cooling groove provided in the cutting part, and the third cooling groove communicates with the flank face;

[0013] Wherein, one side of the flank face communicates with the cutting edge, and the other side of the flank face communicates with the adjacent chip breaking groove.

[0014] Optionally, the flank face includes a first flank face body and a second flank face body both provided at the other end of the cutting part, the first flank face body communicates with the third cooling groove, the side of the first flank face body away from the second flank face body communicates with the adjacent chip breaking groove, and the side of the second flank face body away from the first flank face body communicates with the cutting edge.

[0015] Optionally, the shape of the third cooling groove is spiral.

[0016] Optionally, the number of the chip removal groove, the first cooling groove, the chip breaking groove, the second cooling groove and the cutting edge is two.

[0017] Optionally, the two chip removal grooves, the two first cooling grooves, the two chip breaking grooves, the two second cooling grooves and the two cutting edges are symmetrically arranged about the cutting part.

[0018] Optionally, the shapes of the chip removal groove and the first cooling groove are both spiral.

[0019] Optionally, the shank is a straight shank, a triangular shank or a hexagonal shank.

[0020] Beneficial effects: The coolant flows through the first cooling groove, the chip breaking groove, the second cooling groove and the chip removal groove in sequence. Due to the existence of the second cooling groove, it is convenient for the coolant to bypass the waste chips located on the chip breaking groove, so that the coolant can circulate in the first cooling groove, the chip breaking groove, the second cooling groove and the chip removal groove. Since the cutting edge is communicated with the chip breaking groove, it is equivalent to making the coolant at the cutting edge continue to flow, so that the heat of the cutting edge is taken away by the coolant, thereby reducing the temperature of the cutting edge and prolonging the service life of the external cooling drill bit of the present application. Description of the Drawings

[0021] Figure 1 It is one of the structural schematic diagrams of an external cooling drill bit of the present utility model;

[0022] Figure 2 is Figure 1 the partial view of A in

[0023] Figure 3 It is the second structural schematic diagram of an external cooling drill bit of the present utility model;

[0024] Figure 4 is Figure 3 the partial view of B in

[0025] Figure 5 It is the third structural schematic diagram of an external cooling drill bit of the present utility model;

[0026] In the figure: 1. Cutting part; 11. First cooling groove; 12. Second cooling groove; 13. Third cooling groove; 14. Chip removal groove; 15. Chip breaking groove; 16. Cutting edge; 17. Rear flank; 171. First rear flank body; 172. Second rear flank body; 2. Shank. Detailed Embodiment

[0027] To make the technical solutions of the present utility model clearer, the following further describes the present utility model in detail with reference to the accompanying drawings and specific embodiments.

[0028] Example 1

[0029] Combined with Figures 1-5 , this embodiment provides an externally cooled drill bit, including: a cutting part 1; a shank part 2 connected to one end of the cutting part 1; a chip removal groove 14 and a first cooling groove 11 both provided in the cutting part 1, and the first cooling groove 11 communicates with the chip removal groove 14; a chip breaking groove 15, a second cooling groove 12 and a cutting edge 16 are all provided at the other end of the cutting part 1, the chip breaking groove 15 communicates with the chip removal groove 14 and the first cooling groove 11, the second cooling groove 12 communicates with the chip breaking groove 15 and the chip removal groove 14, and the cutting edge 16 communicates with the chip breaking groove 15.

[0030] Specifically, the flow process of the coolant of the externally cooled drill bit of the present application is as follows: The coolant flows through the first cooling groove 11, the chip breaking groove 15, the second cooling groove 12 and the chip removal groove 14 in sequence. Due to the existence of the second cooling groove 12, it is convenient for the coolant to bypass the waste chips located on the chip breaking groove 15, so that the coolant can circulate in the first cooling groove 11, the chip breaking groove 15, the second cooling groove 12 and the chip removal groove 14. Since the cutting edge 16 communicates with the chip breaking groove 15, it is equivalent to making the coolant at the cutting edge 16 continue to flow, so that the heat of the cutting edge 16 is taken away by the coolant, thereby reducing the temperature of the cutting edge 16 and prolonging the service life of the externally cooled drill bit of the present application;

[0031] Among them, the cutting part 1 is used to carry the shank part 2, the chip removal groove 14, the first cooling groove 11, the chip breaking groove 15, the second cooling groove 12 and the cutting edge 16, etc.; the shank part 2 is used to cooperate with related drilling equipment; the chip removal groove 14 is used for chip removal; the first cooling groove 11 is used to receive the coolant from related coolant supply equipment and transmit the coolant to the chip breaking groove 15; the chip breaking groove 15 is used to control the size of the waste chips, and the size of the chip breaking groove 15 can be changed according to requirements to increase or decrease the size of the waste chips; the second cooling groove 12 is used to receive the coolant from the chip breaking groove 15 and transmit the coolant to the chip removal groove 14. Since the cutting edge 16 communicates with the chip breaking groove 15, it is convenient for the coolant to take away the heat of the cutting edge 16; the cutting edge 16 is used for cutting.

[0032] Furthermore, as Figure 2 and 5 , it further includes: a flank face 17 provided at the other end of the cutting part 1; a third cooling groove 13 provided in the cutting part 1, and the third cooling groove 13 communicates with the flank face 17; among them, one side of the flank face 17 communicates with the cutting edge 16, and the other side of the flank face 17 communicates with the adjacent chip breaking groove 15.

[0033] Specifically, the third cooling groove 13 is used to receive the coolant from the relevant coolant supply device and transfer the coolant to the flank face 17, and the flank face 17 transfers the coolant to the cutting edge 16, further facilitating the removal of the heat of the cutting edge 16.

[0034] Furthermore, as Figure 2 and 5 , the flank face 17 includes a first flank face body 171 and a second flank face body 172 both arranged at the other end of the cutting part 1. The first flank face body 171 is in communication with the third cooling groove 13. The side of the first flank face body 171 away from the second flank face body 172 is in communication with the adjacent chip breaker groove 15, and the side of the second flank face body 172 away from the first flank face body 171 is in communication with the cutting edge 16.

[0035] Specifically, the third cooling groove 13 is used to receive the coolant from the relevant coolant supply device and transfer the coolant to the first flank face body 171, the second flank face body 172 and the cutting edge 16 in sequence, further facilitating the removal of the heat of the cutting edge 16.

[0036] Furthermore, as Figure 2 , the shape of the third cooling groove 13 is spiral, and the spiral shape facilitates increasing the capacity of the third cooling groove 13.

[0037] Furthermore, as Figure 2 and 5 , the number of the chip evacuation grooves 14, the first cooling grooves 11, the chip breaker grooves 15, the second cooling grooves 12 and the cutting edges 16 is two each. Having two each facilitates ensuring the cutting performance and cooling performance of the external cooling drill bit of the present application.

[0038] Furthermore, as Figure 2 and 5 , the two chip evacuation grooves 14, the two first cooling grooves 11, the two chip breaker grooves 15, the two second cooling grooves 12 and the two cutting edges 16 are all arranged axially symmetrically with respect to the cutting part 1. The axial symmetric arrangement facilitates good cutting symmetry and cooling symmetry of the external cooling drill bit of the present application.

[0039] Furthermore, as Figure 2 , the shapes of the chip evacuation grooves 14 and the first cooling grooves 11 are both spiral, and the spiral shape facilitates increasing the capacities of the chip evacuation grooves 14 and the first cooling grooves 11.

[0040] Furthermore, as Figure 1 and 3 , the shank 2 is a straight shank, a triangular shank or a hexagonal shank.

[0041] The above embodiments only illustrate several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several variations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

Claims

1. An externally cooled drill bit, characterized in that: include: Cutting part; a shank connected to one end of the cutting portion; A chip removal groove and a first cooling groove are both provided in the cutting portion, and the first cooling groove is connected to the chip removal groove; A chip breaker groove, a second cooling groove and a cutting edge are all arranged at the other end of the cutting portion, the chip breaker groove is connected to the chip removal groove and the first cooling groove, the second cooling groove is connected to the chip breaker groove and the chip removal groove, and the cutting edge is connected to the chip breaker groove.

2. The externally cooled drill bit according to claim 1, characterized in that: Also includes: A back angle surface provided at the other end of the cutting portion; A third cooling groove is provided in the cutting portion, wherein the third cooling groove is connected to the back angle surface; Wherein, one side of the rear angle surface is connected to the cutting edge, and the other side of the rear angle surface is connected to the adjacent chip breaker groove.

3. The externally cooled drill bit according to claim 2, characterized in that: The rear angle surface includes a first rear angle surface body and a second rear angle surface body, both of which are arranged at the other end of the cutting portion, the first rear angle surface body is connected to the third cooling groove, the side of the first rear angle surface body away from the second rear angle surface body is connected to the adjacent chip breaker groove, and the side of the second rear angle surface body away from the first rear angle surface body is connected to the cutting edge.

4. The externally cooled drill bit according to claim 2, characterized in that: The third cooling groove is in a spiral shape.

5. An externally cooled drill bit according to any one of claims 1 to 4, characterized in that: The number of the chip removal groove, the first cooling groove, the chip breaker groove, the second cooling groove and the cutting edge are all two.

6. The externally cooled drill bit according to claim 5, characterized in that: The two chip removal grooves, the two first cooling grooves, the two chip breaking grooves, the two second cooling grooves and the two cutting edges are all arranged in an axisymmetric manner with respect to the cutting portion.

7. An externally cooled drill bit according to any one of claims 1 to 4, characterized in that: The chip removal groove and the first cooling groove are both in a spiral shape.

8. An externally cooled drill bit according to any one of claims 1 to 4, characterized in that: The handle is a straight handle, a triangular handle or a hexagonal handle.

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