Coating inner-cooling auger bit

Abstract

The utility model belongs to the field of drill bits, and discloses a coating inner-cooling twist drill bit which comprises a drill bit body, the top of the drill bit body is fixedly connected with a connector, the top of the connector is provided with a fixing head, the top of the fixing head is provided with a connecting pipeline in a penetrating mode, and the top of the connecting pipeline is communicated with a liquid inlet pipe. A liquid inlet channel is formed in the top of the connector in a penetrating mode and communicates with the connecting pipeline, a liquid inlet is formed in the top of the drill bit body, and a cooling pipeline is arranged in the drill bit body and communicates with the liquid inlet. The cooling pipeline is arranged in the drill bit body, and the liquid inlet pipe is connected with the cooling liquid storage box outside the drilling machine, so that cooling liquid is conveyed into the drill bit body, the cooling liquid in the cooling pipeline can effectively absorb heat in the drill bit body, and therefore when the drilling machine works, heat in the drill bit body can be effectively dissipated. And the effect of cooling the interior of the drill bit body is achieved, and the protection effect on the drill bit body is improved.

Description

Technical Field

[0001] The utility model relates to the field of drill bits, in particular to a coated internally cooled twist drill bit. Background Art

[0002] A drill is the primary tool used to drill holes in workpieces. The drill's internal motor drives the drill bit at high speed, cutting and drilling the workpiece surface. Due to the constant high-speed friction between the drill bit and the workpiece surface, the drill bit generates heat. To protect both the drill bit and the workpiece, the contact area between them must be continuously cooled during drilling.

[0003] In the prior art, such as the "A New Self-Cooling Drill Bit" in Chinese Patent Publication No. CN214236431U, a self-cooling drill bit is provided, which is suitable for daily drilling of various stainless steels, and is convenient for discharging iron chips, increasing air circulation, and having a good drilling effect. The utility model is convenient for positioning and chip breaking by providing a half-moon cutting device, is easy to position, is not easy to slip, saves materials, and ensures strength.

[0004] When the above-mentioned drill is actually used, the coolant is mainly sprayed on the contact part between the drill bit and the workpiece through an external spray device. Although this method can use the coolant to cool the contact part, the temperature inside the drill bit is still high. It is difficult for the coolant to absorb the internal heat through the outer surface of the drill bit. After a long period of drilling work, the structural strength inside the drill bit will gradually weaken, resulting in a rapid decrease in the service life of the drill bit.

[0005] Based on this, the utility model designs a coated internally cooled twist drill to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the prior art, the utility model provides a twist drill with internal cooling and a coating.

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A coated internally cooled twist drill bit comprises a drill body, a connector fixedly connected to the top of the drill body, a fixed head provided on the top of the connector, a connecting pipe extending through the top of the fixed head, a liquid inlet pipe connected to the top of the connecting pipe, a liquid inlet channel extending through the top of the connector, the liquid inlet channel communicating with the connecting pipe, a liquid inlet port provided on the top of the drill body, a cooling pipe provided inside the drill body, the cooling pipe communicating with the liquid inlet port;

[0009] Furthermore, the bottom of the cooling pipeline passes through the bottom end of the drill body, and the overall shape of the cooling pipeline is spiral;

[0010] Furthermore, a threaded surface is provided inside the fixing head, and the top of the connecting head is connected to the internal thread of the fixing head;

[0011] Furthermore, the liquid outlet hole surrounds the upper part of the drill bit body;

[0012] Furthermore, the inner wall of the liquid inlet channel is provided with a plurality of evenly distributed liquid separation ports, and the bottom of the connector is provided with a plurality of evenly distributed liquid outlet holes;

[0013] Furthermore, the number of the plurality of liquid separation ports is the same as the number of the plurality of liquid outlet holes, and the plurality of liquid separation ports are respectively connected to the plurality of liquid outlet holes;

[0014] Furthermore, the exterior of the fixing head is provided with two symmetrically distributed positioning holes, and the exterior of the connecting head is provided with two symmetrically arranged limiting grooves;

[0015] Furthermore, a plug is slidably connected inside the positioning hole, one end of the plug passes through the positioning hole and is slidably connected to the limiting groove;

[0016] Furthermore, the outside of the plug is sleeved with a No. 1 spring, and the No. 1 spring is arranged outside the fixed head;

[0017] Furthermore, the top of the fixed head is fixedly connected with four evenly distributed telescopic rods, and the outsides of the four telescopic rods are all sleeved with No. 2 springs;

[0018] Beneficial effects

[0019] The utility model provides a cooling pipeline inside the drill bit body and connects the liquid inlet pipe to the coolant storage tank outside the drilling rig, thereby delivering the coolant to the inside of the drill bit body. The coolant in the cooling pipeline can effectively absorb the heat inside the drill bit body, thereby achieving the effect of cooling the inside of the drill bit body when the drilling rig is working, thereby improving the protection effect of the drill bit body.

[0020] At the same time, a portion of the coolant in the liquid inlet channel is diverted to the liquid outlet by setting a liquid diversion port. This portion of coolant will drip around the drill body, so that when the drilling rig is working, the drilling area can be cooled, further improving the cooling effect of the drill bit;

[0021] In addition, by setting a bolt to limit the connecting head and the fixed head laterally, the stability of the connection between the connecting head and the fixed head can be further improved. By setting a telescopic rod and a No. 2 spring between the fixed head and the output end of the drilling rig, a shock-absorbing effect can be exerted on the drill bit body when the drilling rig is working, thereby further improving the protection effect of the drill bit body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0023] Figure 1 This is a three-dimensional diagram of the main structure of a coated internally cooled twist drill bit of the present invention;

[0024] Figure 2 This is a cross-sectional structural diagram of a coated internally cooled twist drill bit of the present invention;

[0025] Figure 3 This is a cross-sectional structural diagram of part of the structure of a coated internally cooled twist drill of the present invention;

[0026] Figure 4 This is a diagram showing the internal structure of a drill body in a coated internally cooled twist drill of the present invention;

[0027] Figure 5 This is a coating inner cooling twist drill bit of the utility model Figure 2 A magnified view of the structure in the middle.

[0028] The numbers in the figure represent:

[0029] 1. Drill bit body; 11. Liquid inlet; 12. Cooling pipe; 2. Connector; 21. Liquid inlet channel; 22. Liquid separation port; 23. Liquid outlet; 24. Limiting groove; 3. Fixed head; 31. Connecting pipe; 32. Positioning hole; 4. Liquid inlet pipe; 5. Plug; 6. Spring No. 1; 7. Telescopic rod; 8. Spring No. 2. DETAILED DESCRIPTION

[0030] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0031] The present invention will be further described below with reference to the embodiments.

[0032] In some embodiments, please refer to the appendix of the specification. Figure 1 - Figure 5A coated internally cooled twist drill comprises a drill body 1, a connecting head 2 is fixedly connected to the top of the drill body 1, a fixed head 3 is provided on the top of the connecting head 2, a connecting pipe 31 is opened through the top of the fixed head 3, the top of the connecting pipe 31 is connected with a liquid inlet pipe 4, a liquid inlet channel 21 is opened through the top of the connecting head 2, the liquid inlet channel 21 is connected to the connecting pipe 31, a liquid inlet port 11 is opened on the top of the drill body 1, a cooling pipe 12 is opened inside the drill body 1, and the cooling pipe 12 is connected to the liquid inlet port 11.

[0033] In an embodiment of the present utility model, the connecting head 2 is used to fix the drill body 1 in the fixed head 3. The top of the fixed head 3 is connected to the output end of the drilling rig. The drilling rig drives the drill body 1 to rotate through the fixed head 3. The liquid inlet pipe 4 is connected to the coolant storage tank of the drilling rig for transporting coolant. After the coolant enters the liquid inlet pipe 4, it enters the connecting pipe 31, and then enters the liquid inlet channel 21 and the liquid inlet 11, and finally enters the cooling pipe 12. The cooling pipe 12 is arranged inside the drill body 1, and its length is adapted to the drill body 1, and can cover most of the inside of the drill body 1. After the coolant enters the cooling pipe 12, it can absorb the heat inside the drill body 1 to a certain extent, thereby achieving the effect of cooling the inside of the drill body 1.

[0034] In an embodiment of the present utility model, a cooling pipe 12 is opened inside the drill body 1, and the liquid inlet pipe 4 is connected to the coolant storage tank outside the drilling rig, so that the coolant is transported to the interior of the drill body 1. The coolant in the cooling pipe 12 can effectively absorb the heat inside the drill body 1, thereby achieving the effect of cooling the inside of the drill body 1 when the drilling rig is working, thereby improving the protection effect of the drill body 1.

[0035] In some embodiments, as Figure 1 - Figure 4 As shown, as a preferred embodiment of the present invention, the bottom of the cooling pipeline 12 passes through the bottom end of the drill body 1, and the overall shape of the cooling pipeline 12 is spiral.

[0036] A threaded surface is provided inside the fixing head 3 , and the top of the connecting head 2 is connected to the internal thread of the fixing head 3 .

[0037] The inner wall of the liquid inlet channel 21 is provided with a plurality of evenly distributed liquid separation ports 22 , and the bottom of the connector 2 is provided with a plurality of evenly distributed liquid outlet holes 23 .

[0038] The number of the plurality of liquid separation ports 22 is the same as the number of the plurality of liquid outlet holes 23 , and the plurality of liquid separation ports 22 are respectively connected to the plurality of liquid outlet holes 23 .

[0039] The liquid outlet hole 23 surrounds the upper portion of the drill body 1 .

[0040] In the embodiment of the present invention, the spiral cooling pipe 12 can absorb the heat inside the drill body 1 more evenly, and can increase the time for the coolant to flow through the cooling pipe 12, effectively avoiding the situation where a part of the coolant is discharged from the drill body 1 without absorbing heat. The coolant in the cooling pipe 12 is eventually discharged from the bottom of the drill body 1, and can also cool the drilling part. The liquid diversion port 22 can divert the coolant in the liquid inlet channel 21 to the liquid outlet hole 23, and a part of the coolant is discharged from the liquid outlet hole 23 and drips around the drill body 1. When the drilling rig is working, the drilling part around the drill body 1 can be cooled by the flowing coolant.

[0041] In an embodiment of the present invention, a portion of the coolant in the liquid inlet channel 21 is diverted to the liquid outlet 23 by providing a liquid diversion port 22, and this portion of the coolant will drip around the drill body 1. In this way, when the drilling rig is working, the drilling area can be cooled, further improving the cooling effect of the drill bit.

[0042] In some embodiments, as Figure 1 、 Figure 2 and Figure 5 As shown, as a preferred embodiment of the present invention, two symmetrically distributed positioning holes 32 are formed on the outside of the fixing head 3, and two symmetrically arranged limiting grooves 24 are formed on the outside of the connecting head 2.

[0043] A plug 5 is slidably connected to the interior of the positioning hole 32 . One end of the plug 5 passes through the positioning hole 32 and is slidably connected to the limiting groove 24 .

[0044] The outside of the plug 5 is sleeved with a No. 1 spring 6 , which is arranged outside the fixing head 3 .

[0045] Four evenly distributed telescopic rods 7 are fixedly connected to the top of the fixed head 3, and the outsides of the four telescopic rods 7 are all sleeved with No. 2 springs 8.

[0046] In the embodiment of the present utility model, before connecting the connecting head 2 with the fixing head 3, the staff should first pull out the two bolts 5 a certain distance outward to separate the two bolts 5 from the inner wall of the fixing head 3. After the connecting head 2 and the fixing head 3 are threadedly connected and tightened, the positions of the two limit grooves 24 should correspond to the positions of the two positioning holes 32. At this time, by loosening the bolt 5, the No. 1 spring 6 resets the bolt 5 and inserts it into the limit groove 24. The lateral limitation of the bolt 5 can further improve the stability of the connection between the connecting head 2 and the fixing head 3. When the fixed head 3 is connected to the output end of the drilling rig, the telescopic rod 7 will abut against one side of the inner wall of the output end. When the drilling rig is working, the telescopic rod 7 cooperates with the No. 2 spring 8 to achieve shock absorption of the drill body 1, further improving the protection effect of the drill body 1.

[0047] In the embodiment of the present utility model, by setting a bolt 5 to laterally limit the connecting head 2 and the fixed head 3, the stability of the connection between the connecting head 2 and the fixed head 3 can be further improved, and by setting a telescopic rod 7 and a No. 2 spring 8 between the fixed head 3 and the output end of the drilling rig, a shock-absorbing effect can be achieved on the drill bit body 1 when the drilling rig is working, further improving the protection effect of the drill bit body 1.

[0048] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A coated internally cooled twist drill, comprising a drill body (1), characterized in that: The top of the drill bit body (1) is fixedly connected to a connector (2), the top of the connector (2) is provided with a fixed head (3), the top of the fixed head (3) is provided with a connecting pipe (31) running through it, the top of the connecting pipe (31) is connected to a liquid inlet pipe (4), the top of the connector (2) is provided with a liquid inlet channel (21), the liquid inlet channel (21) is connected to the connecting pipe (31), the top of the drill bit body (1) is provided with a liquid inlet (11), the interior of the drill bit body (1) is provided with a cooling pipe (12), and the cooling pipe (12) is connected to the liquid inlet (11).

2. The coated internally cooled twist drill according to claim 1, characterized in that: The bottom of the cooling pipeline (12) passes through the bottom end of the drill body (1), and the overall shape of the cooling pipeline (12) is spiral.

3. The coated internally cooled twist drill according to claim 2, characterized in that: The interior of the fixing head (3) is provided with a threaded surface, and the top of the connecting head (2) is connected to the internal thread of the fixing head (3).

4. The coated internally cooled twist drill according to claim 3, characterized in that: The inner wall of the liquid inlet channel (21) is provided with a plurality of evenly distributed liquid separation ports (22), and the bottom of the connector (2) is provided with a plurality of evenly distributed liquid outlet holes (23).

5. The coated internally cooled twist drill according to claim 4, characterized in that: The number of the plurality of liquid separation ports (22) is the same as the number of the plurality of liquid outlet holes (23), and the plurality of liquid separation ports (22) are respectively connected to the plurality of liquid outlet holes (23).

6. The coated internally cooled twist drill according to claim 5, characterized in that: The liquid outlet hole (23) surrounds the upper part of the drill bit body (1).

7. The coated internally cooled twist drill according to claim 1, characterized in that: Two symmetrically distributed positioning holes (32) are formed through the exterior of the fixing head (3), and two symmetrically arranged limiting grooves (24) are formed on the exterior of the connecting head (2).

8. The coated internally cooled twist drill according to claim 7, characterized in that: A plug (5) is slidably connected inside the positioning hole (32), and one end of the plug (5) passes through the positioning hole (32) and is slidably connected to the limiting groove (24).

9. The coated internally cooled twist drill according to claim 8, characterized in that: The outside of the plug (5) is sleeved with a No. 1 spring (6), and the No. 1 spring (6) is arranged outside the fixed head (3).

10. The coated internally cooled twist drill according to claim 9, characterized in that: Four evenly distributed telescopic rods (7) are fixedly connected to the top of the fixed head (3), and the exteriors of the four telescopic rods (7) are sleeved with No. 2 springs (8).

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