PCD countersink drill with replaceable drill bit

Abstract

The utility model belongs to the field of counter bits, and particularly relates to a PCD counter bit with a replaceable bit, which comprises a counter bit, a chip groove arranged on the outer surface of the counter bit, a blade arranged on one side of the chip groove, a connecting rod arranged at one end of the counter bit, a fixing groove arranged on the outer surface of the connecting rod, and a drill rod arranged on the outer side of the connecting rod. A mounting hole is formed in one end of the drill rod, a fixing screw hole is formed in the outer surface of the drill rod, and a positioning rod is fixed to the inner wall of the mounting hole. The connecting rod and the countersink bit are integrated, so that firmness of connection between the countersink bit and the drill rod is guaranteed conveniently, looseness of the connecting rod and the countersink bit in the connection process is prevented, the countersink bit is detachable from the drill rod through the connecting rod, the mounting hole, the fixing screw hole and the fixing bolt, and the damaged countersink bit can be replaced conveniently.

Description

Technical Field

[0001] The utility model relates to a PCD countersink drill, in particular to a PCD countersink drill with a replaceable drill bit, belonging to the technical field of countersink drills. Background Art

[0002] Countersink, also called countersink, slot drill or chamfer drill, is a drill specially used for machining conical countersunk holes on workpieces. It can process the end face of the hole into plane, cylindrical, conical and other surfaces.

[0003] In the prior art, a countersink drill disclosed in announcement number CN211304916U includes a countersink drill including a cutter head, wherein the cutter head includes a conical cutting portion, a cutting edge and a chip groove are provided on the conical surface of the cutting portion, and also includes a tool handle connected to the tool head, wherein the tool handle is one of a cylindrical handle, a triangular handle, a right-angle handle, and a Morse taper handle.

[0004] When the above technical solution is in use, the cutter head and the tool holder are fixed, and the tool holder fixes the countersink to the machine tool. After the countersink is fixed, the workpiece is processed by the cutting edge of the cutter head, and the debris generated by the processing is discharged. However, since the tool holder and the cutter head are fixed structures, when the cutter head processes the workpiece for a long time, the cutting edge will cause certain wear. After wear, the cutter head and the tool holder cannot be disassembled, and the entire countersink needs to be replaced. In view of this, a PCD countersink with a replaceable drill bit is provided to overcome the above defects. Utility Model Content

[0005] The utility model provides a PCD countersink with a replaceable drill bit to solve the problem that the cutting edge will be worn to a certain extent when the cutter head processes the workpiece for a long time, and after the wear, the cutter head and the tool handle cannot be disassembled and the whole countersink needs to be replaced.

[0006] The utility model achieves the above-mentioned purpose through the following technical scheme: a PCD countersink with replaceable drill bit, comprising a countersink bit, a chip groove is provided on the outer surface of the countersink bit, a cutting edge is provided on one side of the chip groove, a connecting rod is provided at one end of the countersink bit, and a fixing groove is provided on the outer surface of the connecting rod;

[0007] A drill rod is arranged on the outside of the connecting rod, a mounting hole is opened at one end of the drill rod, a fixing screw hole is opened on the outer surface of the drill rod, a fixing bolt is connected to the internal thread of the fixing screw hole, a positioning rod is fixed on the inner wall of the mounting hole, a buffer spring is fixed between the positioning rod and the mounting hole, and a buffer plate is fixed at one end of the buffer spring.

[0008] As a further solution of the utility model: the connecting rod and the countersink bit are an integrated fixed structure, and the countersink bit is detachably connected to the drill rod through the connecting rod and the fixing bolts.

[0009] As a further solution of the utility model: a liquid inlet is provided at the other end of the drill rod, a sealing cover is movably connected inside the liquid inlet, a liquid tank is provided at one end of the liquid inlet, and a liquid hole is provided at one end of the liquid tank.

[0010] As a further solution of the utility model: the liquid inlet forms a communicating structure through the liquid tank and the liquid hole, and the buffer plate forms a telescopic structure through the buffer spring and the mounting hole.

[0011] As a further solution of the utility model: a coolant channel 1 is arranged inside the connecting rod, a sealing gasket is arranged at one end of the coolant channel 1, a connecting plate is arranged on one side of the sealing gasket, a plurality of flow holes are opened on the outer surface of the connecting plate, a telescopic spring is fixed on one side of the connecting plate, and a fixed block is fixed at one end of the telescopic spring.

[0012] As a further solution of the utility model: two cooling liquid channels are arranged on both sides of the fixed block, one side of the cooling liquid channel is arranged with an infusion channel, and one end of the infusion channel is arranged with a cooling hole.

[0013] As a further solution of the utility model: the connecting plate forms a telescopic structure with the fixed block through the telescopic spring, and the coolant channel 1 forms a connecting structure with the coolant channel 2 through the flow hole.

[0014] The beneficial effects of the utility model are:

[0015] 1. The connecting rod and the countersink bit are integrated to ensure the firmness of the connection between the countersink bit and the drill rod, and prevent the connecting rod and the countersink bit from loosening during the connection process. The countersink bit can be disassembled from the drill rod through the connecting rod, mounting hole, fixing screw hole, fixing bolt, and the drill rod, which is convenient for replacing the damaged countersink bit;

[0016] 2. The liquid inlet, liquid tank, liquid hole and coolant channel 1 are connected, so that when the connecting rod moves toward the inside of the mounting hole, the positioning rod pushes the connecting plate, the connecting plate is separated from the sealing gasket, and the coolant in the coolant channel 1 flows into the coolant channel 2 through the flow hole on the connecting plate. The buffer plate and the buffer spring play a buffering role when the connecting rod moves, preventing the positioning rod inside the connecting rod from being damaged under violent movement of the connecting rod;

[0017] 3. The connecting plate and the fixed block are extended and retracted by the telescopic spring, so that the flow hole is sealed and circulated through the expansion and contraction of the connecting plate to transport the coolant, so that the coolant in the coolant channel flows to the cooling hole through the flow hole, cools the countersink bit, slows down the speed of damage to the countersink bit, and extends the service life of the countersink bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the connection structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the drill rod of the utility model;

[0021] Figure 4 This is a schematic diagram of the internal structure of the connecting rod of the utility model;

[0022] Figure 5 It is a cross-sectional view of the rear drill bit of the utility model.

[0023] In the figure: 1. countersink bit; 2. blade; 3. infusion channel; 4. cooling hole; 5. buffer spring; 6. connecting rod; 7. fixing groove; 8. drill rod; 9. mounting hole; 10. fixing screw hole; 11. fixing bolt; 12. buffer plate; 13. positioning rod; 14. liquid hole; 15. liquid tank; 16. liquid inlet; 17. sealing cover; 18. coolant channel 1; 19. fixing block; 20. telescopic spring; 21. connecting plate; 22. circulation hole; 23. sealing gasket; 24. coolant channel 2. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Embodiment 1

[0025] like Figures 1 to 5 As shown, a PCD countersink with replaceable drill bits comprises a countersink bit 1, a chip groove is provided on the outer surface of the countersink bit 1, and chips generated by machining a workpiece can be discharged through the chip groove, and a blade 2 is provided on one side of the chip groove, and a connecting rod 6 is provided at one end of the countersink bit 1, and a fixing groove 7 is provided on the outer surface of the connecting rod 6, and the connecting rod 6 can be installed in a mounting hole 9 through the fixing groove 7, and then the connecting rod 6 and the drill rod 8 are fixed through the fixing screw hole 10, and in a fixed state, one end of the fixing screw hole 10 slides in the fixing groove 7, so that the connecting rod 6 moves a certain distance inside the mounting hole 9, so that the positioning rod 13 can push the connecting plate 21 inside the countersink bit 1;

[0026] A drill rod 8 is arranged on the outside of the connecting rod 6, and a mounting hole 9 is opened at one end of the drill rod 8. A fixing screw hole 10 is opened on the outer surface of the drill rod 8. The internal thread of the fixing screw hole 10 is connected with a fixing bolt 11. The countersinking bit 1 is disassembled and assembled through the connecting rod 6, the mounting hole 9, the fixing screw hole 10 and the fixing bolt 11. A positioning rod 13 is fixed to the inner wall of the mounting hole 9. The positioning rod 13 is not only convenient for positioning and installing the countersinking bit 1, but also convenient for inputting the coolant in the liquid tank 15 into the coolant channel 18 through the positioning rod 13 and the liquid hole 14. A buffer spring 5 is fixed between the positioning rod 13 and the mounting hole 9, and a buffer plate 12 is fixed at one end of the buffer spring 5. The buffer spring 5 and the buffer spring 5 can reduce the impact force generated when the connecting rod 6 moves in the mounting hole 9. Embodiment 2

[0027] In addition to all the technical features of the first embodiment, this embodiment also includes:

[0028] The connecting rod 6 and the countersink bit 1 are an integrated fixed structure, and the countersink bit 1 is detachably connected to the drill rod 8 through the connecting rod 6 and the fixing bolt 11. The connecting rod 6 and the countersink bit 1 are integrated, which is convenient for ensuring the firmness of the connection between the countersink bit 1 and the drill rod 8 and preventing the connecting rod 6 and the countersink bit 1 from loosening during the connection process. The countersink bit 1 is detachable from the drill rod 8 through the connecting rod 6, the mounting hole 9, the fixing screw hole 10, and the fixing bolt 11, which is convenient for replacing the damaged countersink bit 1.

[0029] A liquid inlet 16 is provided at the other end of the drill rod 8, and a sealing cover 17 is movably connected inside the liquid inlet 16. A liquid tank 15 is provided at one end of the liquid inlet 16, and a liquid hole 14 is provided at one end of the liquid tank 15. The coolant can be input into the liquid tank 15 through the liquid inlet 16, and then input into the liquid hole 14 and the coolant channel 18 through the liquid tank 15, so as to facilitate the coolant to be transported to the countersink drill bit 1 to cool the countersink drill bit 1. The sealing cover 17 seals the liquid inlet 16 after the coolant is input to prevent the coolant from spilling out from the liquid inlet 16 and causing waste.

[0030] The liquid inlet 16 forms a connecting structure with the liquid groove 15 and the liquid hole 14, and the buffer plate 12 forms a telescopic structure with the mounting hole 9 through the buffer spring 5. The liquid inlet 16, the liquid groove 15, the liquid hole 14, and the coolant channel 18 are connected, so that when the connecting rod 6 moves toward the inside of the mounting hole 9, the positioning rod 13 pushes the connecting plate 21, and the connecting plate 21 is separated from the sealing gasket 23, so that the coolant in the coolant channel 18 flows into the coolant channel 2 24 through the flow hole 22 on the connecting plate 21. The buffer plate 12 and the buffer spring 5 play a buffering role when the connecting rod 6 moves, preventing the positioning rod 13 inside the connecting rod 6 from being damaged due to violent movement.

[0031] A coolant channel 18 is provided inside the connecting rod 6, and a sealing gasket 23 is bonded to one end of the coolant channel 18. A connecting plate 21 is provided on one side of the sealing gasket 23. A plurality of flow holes 22 are opened on the surface of the connecting plate 21. A telescopic spring 20 is fixed to one side of the connecting plate 21, and a fixing block 19 is fixed to one end of the telescopic spring 20. When the countersink is not in use, the connecting plate 21 and the flow holes 22 are squeezed by the elastic action of the telescopic spring 20 through the sealing gasket 23, and the sealing gasket 23 is tightly fitted to form a sealing structure between the connecting plate 21 and the sealing gasket 23 to prevent the coolant from flowing out when the PCD countersink is not in use.

[0032] Coolant channels 24 are provided on both sides of the fixed block 19, an infusion channel 3 is provided on one side of the coolant channel 24, a cooling hole 4 is provided at one end of the infusion channel 3, and the coolant channel 24, the infusion channel 3, and the cooling hole 4 are interconnected, so that the coolant flows out of the cooling hole 4 to cool the blade 2 of the countersink drill, thereby extending the service life of the countersink drill bit 1.

[0033] The connecting plate 21 forms a telescopic structure with the fixed block 19 through the telescopic spring 20, and the coolant channel 1 18 forms a connecting structure with the coolant channel 2 24 through the flow hole 22. The telescopic spring 20 allows the connecting plate 21 and the fixed block 19 to be telescoped, so that the flow hole 22 is sealed and circulated through the telescopic connection plate 21 to transport the coolant, so that the coolant in the coolant channel 1 18 flows to the cooling hole 4 through the flow hole 22, so as to cool the countersink bit 1, slow down the damage rate of the countersink bit 1, and extend the service life of the countersink bit 1.

[0034] Working principle: Before using the PCD countersink drill, first connect the connecting rod 6 at one end of the countersink drill bit 1 through the positioning rod 13 and the coolant channel 18, so that the connecting rod 6 is installed in the mounting hole 9 of the drill rod 8, and the countersink drill bit 1 is rotated to make the fixing groove 7 on the connecting rod 6 correspond to the fixing screw hole 10, and then fixed by the fixing bolt 11. This structure facilitates the replacement of the countersink drill bit 1 with a damaged blade 2. A liquid inlet 16 is provided at the tail end of the drill rod 8, and the coolant is input into the liquid tank 15 through the liquid inlet 16. After the coolant in the liquid tank 15 is sufficient, the sealing cover 17 is installed on the liquid inlet 16 to seal it to prevent the coolant in the liquid tank 15 from spilling and overflowing. After the coolant is injected, the coolant is input into the coolant channel 18 inside the connecting rod 6 through the liquid hole 14. When using the countersink drill, When the workpiece is being processed, the countersink drill bit 1 is pressed against the surface of the workpiece, so that the connecting rod 6 moves slightly toward the inside of the mounting hole 9 through the fixing groove 7, the buffer spring 5 and the buffer plate 12. At the same time, the positioning rod 13 pushes the connecting plate 21 at one end of the coolant channel 18 to move, and the telescopic spring 20 contracts on the fixing block 19, driving the connecting plate 21 to separate from the sealing gasket 23, so that the coolant in the coolant channel 18 flows through the circulation hole 22 to the inside of the coolant channel 2 24, and then the coolant is input into the cooling hole 4 through the infusion channel 3 on one side of the coolant channel 2 24, so that the countersink drill cools the blade 2 through the cooling hole 4 during operation, so as to prevent the blade 2 from being worn when the countersink drill generates a lot of heat due to long-term high-speed operation, thereby improving the service life of the countersink drill bit 1.

[0035] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0036] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A PCD countersink with a replaceable drill bit, comprising a countersink bit (1), characterized in that: The countersink bit (1) has a chip removal groove on its outer surface, a blade (2) is provided on one side of the chip removal groove, a connecting rod (6) is provided at one end of the countersink bit (1), and a fixing groove (7) is provided on the outer surface of the connecting rod (6); A drill rod (8) is arranged on the outside of the connecting rod (6), a mounting hole (9) is provided at one end of the drill rod (8), a fixing screw hole (10) is provided on the outer surface of the drill rod (8), a fixing bolt (11) is connected to the inner thread of the fixing screw hole (10), a positioning rod (13) is fixed to the inner wall of the mounting hole (9), a buffer spring (5) is fixed between the positioning rod (13) and the mounting hole (9), and a buffer plate (12) is fixed to one end of the buffer spring (5).

2. The PCD countersink with replaceable drill bit according to claim 1, characterized in that: The connecting rod (6) and the countersink bit (1) are an integral fixed structure, and the countersink bit (1) is detachably connected to the drill rod (8) via the connecting rod (6) and the fixing bolt (11).

3. The PCD countersink with replaceable drill bit according to claim 1, characterized in that: The other end of the drill rod (8) is provided with a liquid inlet (16), the interior of the liquid inlet (16) is movably connected to a sealing cover (17), one end of the liquid inlet (16) is provided with a liquid tank (15), and one end of the liquid tank (15) is provided with a liquid hole (14).

4. The PCD countersink with replaceable drill bit according to claim 3, characterized in that: The liquid inlet (16) forms a communication structure with the liquid groove (15) and the liquid hole (14), and the buffer plate (12) forms a telescopic structure with the mounting hole (9) through the buffer spring (5).

5. The PCD countersink with replaceable drill bit according to claim 1, characterized in that: A coolant channel (18) is provided inside the connecting rod (6), a sealing gasket (23) is provided at one end of the coolant channel (18), a connecting plate (21) is provided on one side of the sealing gasket (23), a plurality of flow holes (22) are provided on the outer surface of the connecting plate (21), a telescopic spring (20) is fixed on one side of the connecting plate (21), and a fixing block (19) is fixed on one end of the telescopic spring (20).

6. The PCD countersink with replaceable drill bit according to claim 5, characterized in that: Cooling liquid channel 2 (24) is provided on both sides of the fixing block (19), a liquid infusion channel (3) is provided on one side of the cooling liquid channel 2 (24), and a cooling hole (4) is provided at one end of the liquid infusion channel (3).

7. The PCD countersink with replaceable drill bit according to claim 6, characterized in that: The connecting plate (21) forms a telescopic structure with the fixed block (19) through the telescopic spring (20), and the coolant channel 1 (18) forms a communication structure with the coolant channel 2 (24) through the flow hole (22).

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