Inner-cooling chamfering drill with self-cleaning function

Abstract

The utility model belongs to the technical field of chamfering drills, particularly relates to an inner-cooling chamfering drill with a self-cleaning function, and aims to solve the problem that a drill bit cannot well realize uniform chamfering under the condition that the surface of a steel part blank is uneven when the conventional inner-cooling chamfering drill is used, and adopts the following scheme that the inner-cooling chamfering drill comprises a movable drill handle, a chamfering drill bit is connected to one side of the movable drill handle, an adjusting mechanism used for adjusting the chamfering drill is arranged at the other end of the movable drill handle, and a heat dissipation mechanism used for cooling the chamfering drill is arranged on the outer surface of the movable drill handle. The adjusting mechanism comprises a fixed drill handle. Under the cooperation of the limiting block, the movable drillstock can do telescopic motion on the fixed drillstock, when the chamfering drill bit machines an uneven workpiece, the movable drillstock can move to drive the limiting ring to push the buffer spring to be compressed, the buffer spring can push the chamfering drill bit tightly under pressure, and therefore the chamfering drill bit is prevented from being damaged. And the contact effect of the chamfering drill bit and the workpiece is ensured.

Description

Technical Field

[0001] This utility model relates to an internal cooling chamfering drill, specifically an internal cooling chamfering drill with self-cleaning function, belonging to the field of chamfering drill technology. Background Technology

[0002] An internally cooled chamfering drill is a machining tool that combines an internal cooling system with chamfering cutting functionality. It's a drill bit with cooling channels near the cutting edge, used to chamfer the hole opening while drilling. The internal cooling system effectively reduces cutting temperature, tool wear, and improves machining efficiency and workpiece quality by delivering coolant (such as cutting fluid or oil) to the cutting area during the cutting process. Simultaneously, the chamfering cutting function makes the hole edge smoother, facilitating subsequent assembly and machining.

[0003] In the prior art, such as the chamfering drill disclosed in CN218192739U, a chamfering drill shank and a chamfering drill bit are included. The chamfering drill bit has a flat structure, and a fixing slot is provided at the top of the chamfering drill shank, within which the chamfering drill bit is disposed. Both sides of the chamfering drill bit are provided with cutting edges, one cutting edge extending smoothly from the top to a bottom end, and the other cutting edge extending smoothly from the top to the other bottom end. Its flat drill bit structure makes it easy to manufacture, and the width of the cutting edges of the chamfering drill shank increases sequentially from top to bottom. Increasing the rake angle of the cutting edges reduces cutting resistance and burr generation, while decreasing the clearance angle increases support during chamfering, thus increasing the stability of the chamfering drill.

[0004] In the above technical solution, the drill bit has a flat structure, which is easy to manufacture. Moreover, the width of the cutting edge of the chamfering drill shank increases from top to bottom. By increasing the rake angle of the cutting edge, the cutting resistance can be reduced and the generation of burrs can be reduced. However, when in use, due to the uneven surface of the steel blank, the drill bit cannot achieve a uniform chamfer. In view of this, an internal cooling chamfering drill with self-cleaning function is provided to overcome the above defects. Utility Model Content

[0005] This invention addresses the problem that, during use, the uneven surface of the steel blank prevents the drill bit from achieving a uniform chamfer, by providing an internally cooled chamfering drill with a self-cleaning function.

[0006] The present invention achieves the above objectives through the following technical solution: an internal cooling chamfering drill with self-cleaning function, comprising a movable drill shank, a chamfering drill bit connected to one side of the movable drill shank, an adjustment mechanism for adjusting the chamfering drill at the other end of the movable drill shank, and a heat dissipation mechanism for cooling the chamfering drill on the outer surface of the movable drill shank.

[0007] The adjusting mechanism includes a fixed drill shank, which is telescopically connected to the other end of a movable drill shank. A limit block is fixed inside the fixed drill shank, and a limit groove opened on the movable drill shank is slidably connected to one side of the limit block. A limit ring is slidably connected inside the fixed drill shank, and a buffer spring is abutted against the side wall of the limit ring.

[0008] As a further improvement of this utility model, two chip removal grooves are formed on the outer surface of the chamfered drill bit.

[0009] As a further embodiment of this utility model: the heat dissipation mechanism includes a connector, which is sleeved on the outer surface of the movable drill shank, and the outer wall of the connector is connected to a water inlet pipe.

[0010] As a further improvement of this utility model, the connector has two fixed bearings that are sleeved on the movable drill shank.

[0011] As a further improvement of this utility model: the movable drill shank has a flow cavity that communicates with the connecting member inside, and a connecting rod that communicates with the flow cavity is fixed on one side of the movable drill shank.

[0012] As a further improvement of this utility model: the outer surface of the connecting rod is provided with a connecting hole, and the outer wall of the chamfered drill bit and the side near each chip removal groove is provided with a water spray nozzle that communicates with the connecting hole.

[0013] As a further improvement of this utility model: a fixing bolt is installed on the outer surface of the chamfered drill bit, and the end of the fixing bolt is inserted into a limiting hole opened on the connecting rod.

[0014] The beneficial effects of this utility model are: with the cooperation of the limiting block, the movable drill shank can extend and retract on the fixed drill shank. When the chamfering drill bit processes an uneven workpiece, the movable drill shank can move, driving the limiting ring to push the buffer spring to compress. The buffer spring, under pressure, will push the chamfering drill bit tight, ensuring the contact effect between the chamfering drill bit and the workpiece.

[0015] An external delivery pump delivers coolant through pipes to the inside of the connector, then into the flow chamber. Through the connecting hole in the connecting rod, the coolant can enter the heat dissipation chamber inside the chamfered drill bit, and then be sprayed out through the spray nozzle on the chamfered drill bit. While cooling the chamfered drill bit, it can also flush out the waste chips in the chip removal groove. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2This is a three-dimensional structural diagram of the movable drill shank of this utility model;

[0018] Figure 3 This is a cross-sectional structural diagram of the connector of this utility model;

[0019] Figure 4 This is a cross-sectional structural diagram of the fixed drill shank of this utility model.

[0020] In the diagram: 1. Movable drill shank; 2. Chamfered drill bit; 3. Fixed drill shank; 31. Limiting block; 32. Limiting groove; 33. Buffer spring; 34. Limiting ring; 4. Connecting piece; 41. Water inlet pipe; 42. Fixed bearing; 43. Flow chamber; 44. Connecting rod; 45. Connecting hole; 46. Water nozzle; 5. Chip removal groove; 6. Fixing bolt; 7. Limiting hole. Detailed Implementation

[0021] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0022] like Figures 1 to 4 As shown, an internal cooling chamfering drill with self-cleaning function includes a movable drill shank 1, a chamfering drill bit 2 connected to one side of the movable drill shank 1, an adjustment mechanism for adjusting the chamfering drill bit at the other end of the movable drill shank 1, and a heat dissipation mechanism for cooling the chamfering drill bit on the outer surface of the movable drill shank 1.

[0023] The adjusting mechanism includes a fixed drill shank 3, which is telescopically connected to the other end of the movable drill shank 1. A limit block 31 is fixed inside the fixed drill shank 3, and a limit groove 32 on the movable drill shank 1 is slidably connected to one side of the limit block 31. A limit ring 34 is slidably connected inside the fixed drill shank 3, and a buffer spring 33 is abutted against the side wall of the limit ring 34. Two chip removal grooves 5 are formed on the outer surface of the chamfering drill bit 2. The fixed drill shank 3 on the movable drill shank 1 is connected to the output end of the machine tool, enabling the machine tool to drive the fixed drill shank 3 to rotate, thereby driving the chamfering drill bit. 2. Rotate to chamfer the workpiece, and facilitate the discharge of waste generated during processing through the chip removal groove 5 opened on the chamfering drill bit 2. Through the limiting slide groove 32 set on the movable drill shank 1, with the cooperation of the limiting block 31, the movable drill shank 1 can extend and retract on the fixed drill shank 3. When the chamfering drill bit 2 processes the uneven workpiece, the movable drill shank 1 can move, driving the limiting ring 34 to push the buffer spring 33 to compress, and the buffer spring 33 will be pressed to tighten the chamfering drill bit 2 to ensure the contact effect between the chamfering drill bit 2 and the workpiece. Example 2

[0024] In addition to all the technical features in Embodiment 1, this embodiment also includes: a heat dissipation mechanism comprising a connector 4, which is sleeved on the outer surface of the movable drill shank 1; a water inlet pipe 41 is connected to the outer wall of the connector 4; two fixed bearings 42 sleeved on the movable drill shank 1 are fixed inside the connector 4; a flow cavity 43 communicating with the connector 4 is opened inside the movable drill shank 1; a connecting rod 44 communicating with the flow cavity 43 is fixed on one side of the movable drill shank 1; a connecting hole 45 is opened on the outer surface of the connecting rod 44; a water spray nozzle 46 communicating with the connecting hole 45 is opened on the outer wall of the chamfered drill bit 2 near the chip removal groove 5; a fixing bolt 6 is installed on the outer surface of the chamfered drill bit 2; and a limiting hole 7 opened on the connecting rod 44 is inserted into the end of the fixing bolt 6. The water inlet pipe 41 on component 4 is connected to an external delivery pipe. The external delivery pump delivers coolant through the pipe to the inside of component 4, and then into the flow chamber 43. Through the connection hole 45 in the connecting rod 44, the coolant can enter the heat dissipation chamber inside the chamfered drill bit 2, and then be sprayed out through the spray nozzle 46 on the chamfered drill bit 2. While dissipating heat from the chamfered drill bit 2, it can also flush out the waste chips in the chip removal groove 5, improving practicality. The fixed bearing 42 ensures that the connecting component 4 will not rotate when the movable drill shank 1 rotates, ensuring the normal delivery of coolant. By unscrewing the fixing bolt 6 on the chamfered drill bit 2, the fixing bolt 6 is separated from the limiting hole 7 on the connecting rod 44, releasing the fixation of the chamfered drill bit 2, so that the chamfered drill bit 2 can be replaced separately.

[0025] Working Principle: Before using the self-cleaning internal cooling chamfering drill, connect the chamfering drill to the output shaft of the machine tool. Connect the fixed drill shank 3 on the movable drill shank 1 to the output end of the machine tool, so that the machine tool can drive the fixed drill shank 3 to rotate, thereby driving the chamfering drill bit 2 to rotate and perform chamfering on the workpiece. The chip removal groove 5 on the chamfering drill bit 2 facilitates the discharge of waste generated during processing. Through the limiting slide groove 32 on the movable drill shank 1, with the cooperation of the limiting block 31, the movable drill shank 1 can extend and retract on the fixed drill shank 3. When the chamfering drill bit 2 processes an uneven workpiece, the movable drill shank 1 can move, driving the limiting ring 34 to push the buffer spring 33 to compress. The buffer spring 33, under pressure, will push the chamfering drill bit 2 tightly, ensuring that the chamfering drill bit 2 and the workpiece are properly aligned. In terms of contact effect, the water inlet pipe 41 on the connector 4 is connected to the external delivery pipe. The external delivery pump delivers coolant to the inside of the connector 4 through the pipe, and then into the flow chamber 43. Through the connection hole 45 in the connecting rod 44, the coolant can enter the heat dissipation chamber inside the chamfered drill bit 2, and then be sprayed out through the spray nozzle 46 on the chamfered drill bit 2. While dissipating heat from the chamfered drill bit 2, it can also flush out the waste chips in the chip removal groove 5, improving practicality. The fixed bearing 42 ensures that the connector 4 will not rotate when the movable drill shank 1 rotates, ensuring the normal delivery of coolant. By unscrewing the fixing bolt 6 on the chamfered drill bit 2, the fixing bolt 6 is separated from the limiting hole 7 on the connecting rod 44, releasing the fixation of the chamfered drill bit 2. This allows the chamfered drill bit 2 to be replaced separately, improving practicality.

[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An internal cooling chamfering drill with self-cleaning function, comprising a movable drill shank (1), characterized in that: One side of the movable drill shank (1) is connected to a chamfered drill bit (2), and the other end of the movable drill shank (1) is provided with an adjustment mechanism for adjusting the chamfered drill bit. The outer surface of the movable drill shank (1) is provided with a heat dissipation mechanism for cooling the chamfered drill bit. The adjustment mechanism includes a fixed drill shank (3), which is telescopically connected to the other end of the movable drill shank (1). A limit block (31) is fixed inside the fixed drill shank (3). A limit groove (32) opened on the movable drill shank (1) is slidably connected to one side of the limit block (31). A limit ring (34) is slidably connected inside the fixed drill shank (3). A buffer spring (33) is abutted against the side wall of the limit ring (34).

2. The internal cooling chamfering drill with self-cleaning function according to claim 1, characterized in that: The outer surface of the chamfered drill bit (2) has two chip removal grooves (5).

3. The internal cooling chamfering drill with self-cleaning function according to claim 2, characterized in that: The heat dissipation mechanism includes a connector (4), which is sleeved on the outer surface of the movable drill shank (1), and the outer wall of the connector (4) is connected to a water inlet pipe (41).

4. The internal cooling chamfering drill with self-cleaning function according to claim 3, characterized in that: The connector (4) has two fixed bearings (42) that are sleeved on the movable drill shank (1).

5. The internal cooling chamfering drill with self-cleaning function according to claim 4, characterized in that: The movable drill shank (1) has a flow cavity (43) that communicates with the connector (4) inside, and a connecting rod (44) that communicates with the flow cavity (43) is fixed on one side of the movable drill shank (1).

6. The internal cooling chamfering drill with self-cleaning function according to claim 5, characterized in that: The outer surface of the connecting rod (44) is provided with a connecting hole (45), and the outer wall of the chamfered drill bit (2) and the side near each chip removal groove (5) is provided with a water spray nozzle (46) that communicates with the connecting hole (45).

7. The internal cooling chamfering drill with self-cleaning function according to claim 6, characterized in that: The outer surface of the chamfered drill bit (2) is fitted with a fixing bolt (6), and the end of the fixing bolt (6) is connected to a limiting hole (7) opened on the connecting rod (44).

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