Drill bit for numerical control drilling machine

Abstract

The drill bit for the numerical control drilling machine comprises a drill bit body and an installation cylinder, a limiting ring is fixedly installed on the outer side of the installation cylinder, a ferrule is installed on the outer side of the installation cylinder, a sliding groove is formed in the ferrule, the sliding groove is connected with the limiting ring in a sliding mode, a plurality of round holes are formed in the limiting ring, and balls are rotatably installed in the round holes. A rolling groove is formed in the position, located on one side of the sliding groove, in the ferrule and matched with the ball, an air cavity is formed in the ferrule, an air inlet pipe is arranged on one side of the ferrule and communicated with the air cavity, and a plurality of air nozzles are arranged at the bottom of the ferrule and communicated with the air cavity. Through cooperation of the limiting ring, the sleeve ring, the sliding groove, the round hole, the balls, the rolling groove, the air cavity, the air inlet pipe and the air nozzle, metal dust generated during drill bit machining is blown away, the metal dust is prevented from remaining in a drill hole, meanwhile, the drill bit body is cooled, and then the working efficiency of drill bit machining is improved.

Description

Technical Field

[0001] The utility model relates to a drill bit, in particular to a drill bit for a numerical control drilling machine. Background Art

[0002] Typically, drill bit rotation is the primary motion, with axial movement as the feed motion. Drills are commonly used on drilling machines, which have a simple structure and can drill through holes, blind holes, and, with the addition of specialized tools, perform processes such as reaming, countersinking, reaming, and tapping. A characteristic of drilling machines is that the workpiece remains stationary while the tool rotates. During machining, the workpiece remains stationary, while the tool moves to align the tool center with the hole center, while the tool rotates (the primary motion).

[0003] The Chinese utility model patent with announcement number CN 213105578 U and announcement date 2021.05.04 discloses a drill bit for a drilling machine that is easy to replace. By installing a baffle at the upper end of the drill bit body with a screw, the pull rod is pulled to pass the lower end of the drill bit body from top to bottom inside the circular tube, so that the lower end of the baffle contacts the upper end of the circular ring piece, and then the connecting block is placed in the circular tube and the pull rod is released. The spring can drive the slide to insert the insertion strip into the socket of the connecting block. The insertion of the insertion strip into the socket can fix the connecting block in the circular ring. The connecting block contacts the baffle and inserts the insertion block into the slot. The drill bit body can be fixed by inserting the insertion block into the slot, and the drill bit body can be installed on the drilling machine through the connecting block.

[0004] However, the above-mentioned drill bit for drilling machines has certain shortcomings. When the drill bit is drilling a workpiece, it will not only generate waste chips but also metal dust. If it cannot be cleaned in time, a large amount of metal dust will remain in the drill hole, resulting in increased friction at the contact point between the drill bit and the workpiece, affecting the service life of the drill bit and the processing efficiency. In addition, the drill bit will cause the drill bit temperature to rise during drilling. If it cannot be cooled down in time, it will affect the strength and processing speed of the drill bit, and then affect the work efficiency. The above-mentioned drill bit for drilling machines does not have dust removal and cooling functions. Summary of the Invention

[0005] The technical problem to be solved by the utility model is how to remove metal dust at the drill bit and cool the drill bit when the drill bit is drilling a workpiece.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: a drill bit for a CNC drilling machine, comprising a drill bit body and a mounting cylinder connected to one end of the drill bit body and rotating with the drill bit body, a limit ring is fixedly installed on the outside of the mounting cylinder, a ferrule is installed on the outside of the mounting cylinder, a slide groove is provided inside the ferrule, the slide groove is slidably connected to the limit ring, a plurality of circular holes are provided inside the limit ring, a ball is rotatably installed inside the circular hole, a rolling groove is provided inside the ferrule and on one side of the slide groove, the rolling groove cooperates with the ball, an air cavity is provided inside the ferrule, an air inlet pipe is provided on one side of the ferrule, the air inlet pipe is connected to the air cavity, a plurality of air nozzles are provided at the bottom of the ferrule, the air nozzles are connected to the air cavity.

[0007] A mounting plate is fixedly installed at one end of the drill body, and the mounting plate cooperates with the inner wall of the mounting cylinder. A mounting block is installed inside the mounting cylinder, and two mounting block fixing pins are fixedly installed on the bottom of the mounting block. Two mounting plate fixing holes are provided inside the top of the mounting plate, and the mounting block fixing pins cooperate with the corresponding mounting plate fixing holes. Fixed threaded holes are provided inside the corresponding sides of the mounting cylinder and the mounting block, and fixing bolts are installed on the internal threads of the fixed threaded holes.

[0008] A positioning plate is installed on the outside of the mounting block, and mounting tube positioning pins are fixedly installed on both sides of the top of the mounting tube. Two positioning plate positioning holes are provided inside the positioning plate, and the mounting tube positioning pins cooperate with the corresponding positioning plate positioning holes.

[0009] The interior of the installation cylinder is provided with a hole that matches the installation plate and the installation block.

[0010] A hole matching with the drill bit body is provided inside the mounting cylinder.

[0011] The inside of the ferrule is provided with a hole which matches with the mounting cylinder.

[0012] The utility model provides a drill bit for a CNC drilling machine. The drill bit is configured to work with a limit ring, a ferrule, a slide groove, a circular hole, a ball bearing, a rolling groove, an air cavity, an air intake pipe, and an air nozzle. When the drill bit is processing a workpiece on the drilling machine, air is introduced from the air intake pipe into the air cavity via an external air compressor. The air in the air cavity is then ejected through a plurality of air nozzles, thereby blowing away metal dust generated during the drilling process and preventing metal dust from remaining in the drill hole. Furthermore, the air blowing to the drill bit through the air nozzles not only removes dust but also cools the drill body, thereby improving the efficiency of the drilling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 This is a schematic cross-sectional view of the utility model;

[0015] Figure 3 for Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0016] In the figure: 1-drill bit body, 2-mounting cylinder, 3-limiting ring, 4-ring, 5-slide groove, 6-round hole, 7-ball, 8-rolling groove, 9-air cavity, 10-inlet pipe, 11-air nozzle, 12-mounting plate, 13-mounting block, 14-fixing pin, 15-fixing hole, 16-positioning plate, 17-positioning pin, 18-positioning hole, 19-fixing threaded hole, 20-fixing bolt. DETAILED DESCRIPTION

[0017] The following is a detailed description of a drill bit for a numerically controlled drilling machine according to the present invention with reference to the accompanying drawings.

[0018] The utility model is a drill bit for a numerically controlled drilling machine, see Figures 1 to 3 , including a drill body 1 and a mounting tube 2, the bottom of the mounting tube 2 is provided with a hole that matches the drill body 1, the outside of the mounting tube 2 is fixedly installed with a limit ring 3, the outside of the mounting tube 2 is rotatably installed with a ferrule 4, the inside of the ferrule 4 is provided with a hole that matches the mounting tube 2, the inside of the ferrule 4 is provided with a slide groove 5, the slide groove 5 is slidably connected with the limit ring 3, the inside of the limit ring 3 is provided with a plurality of circular holes 6, the inside of the circular hole 6 is rotatably installed with a ball 7, the inside of the ferrule 4 and on one side of the slide groove 5 is provided with a rolling groove 8, the rolling groove 8 matches the ball 7 An air cavity 9 is provided inside the ferrule 4, and an air inlet pipe 10 is provided on one side of the ferrule 4, wherein one end of the air inlet pipe 10 is fixedly connected to the output end of the air compressor provided on one side of the CNC drilling machine, and the air inlet pipe 10 is communicated with the air cavity 9. A plurality of air nozzles 11 are provided at the bottom of the ferrule 4, and the air nozzles 11 are communicated with the air cavity 9. The main function of the limit ring 3, the slide groove 5, the circular hole 6, the ball 7 and the rolling groove 8 is to make the mounting cylinder 2 rotate in the ferrule 4. When the mounting cylinder 2 and the drill body 1 are rotating for drilling processing, the position of the ferrule 4 is fixed.

[0019] A mounting plate 12 is fixedly mounted on one end of the drill body 1 of the present invention. The mounting plate 12 cooperates with the mounting tube 2. A mounting block 13 is mounted inside the mounting tube 2. The mounting tube 2 has holes formed inside to cooperate with the mounting plate 12 and the mounting block 13. Two fixing pins 14 are fixedly mounted on the bottom of the mounting block 13. Two fixing holes 15 are formed inside the top of the mounting plate 12. The fixing pins 14 cooperate with the fixing holes 15. A positioning plate 16 is fixedly mounted on the outside of the mounting block 13. Positioning pins 17 are fixedly mounted on both sides of the top of the mounting tube 2. Two positioning holes 18 are formed inside the positioning plate 16. The positioning pins 17 cooperate with the positioning holes 18. Threaded fixing holes 19 are formed inside both sides of the mounting tube 2 and the mounting block 13. Fixing bolts 20 are threadedly mounted inside the threaded fixing holes 19. The main functions of the mounting plate 12, mounting block 13, fixing pin 14, fixing hole 15, fixing threaded hole 19 and fixing bolt 20 of the utility model are to facilitate the installation and disassembly of the drill body 1, so as to facilitate the replacement of the drill body 1 according to different processing requirements. The main function of the mounting block 13 is to fix and limit the mounting plate 12 through the fixing pin 14 and the fixing hole 15, and secondly to be used for connecting with the working end of the CNC drilling machine.

[0020] To use the drill, the drill bit must be installed. First, insert the drill body 1 from the top of the mounting tube 2, passing it through the interior of the mounting tube 2. Then, insert the mounting block 13 into the mounting tube 2. The two fixing pins 14 are inserted into the fixing holes 15 to limit the mounting plate 12. Then, screw the fixing bolts 20 into the fixing threaded holes 19 to secure the mounting block 13 and mounting plate 12, completing the installation. Once installed, connect the mounting block 13 to the working end of the CNC drilling machine and begin use. To drill a workpiece, the CNC drilling machine output drives the mounting tube 2 and the drill body 1 to rotate. As the mounting tube 2 rotates, the ferrule 4 engages with the ball 7 through the rolling groove 8, and the ferrule 4 does not rotate with it. During the process, the air compressor is turned on to direct air into the air cavity 9 through the air inlet pipe 10. The air in the air cavity 9 is blown out through the air nozzle 11, removing dust from the drilling area and simultaneously cooling the drill body 1.

Claims

1. A drill bit for a CNC drilling machine, comprising a drill bit body and a mounting tube connected to one end of the drill bit body and rotating together with the drill bit body, characterized in that A limit ring is fixedly installed on the outside of the mounting cylinder, and a ferrule is installed on the outside of the mounting cylinder. A slide groove is provided inside the ferrule, and the slide groove is slidably connected to the limit ring. A plurality of circular holes are provided inside the limit ring, and balls are rotatably installed inside the circular holes. A rolling groove is provided inside the ferrule and on one side of the slide groove, and the rolling groove cooperates with the ball. An air cavity is provided inside the ferrule, and an air inlet pipe is provided on one side of the ferrule, and the air inlet pipe is connected to the air cavity. A plurality of air nozzles are provided at the bottom of the ferrule, and the air nozzles are connected to the air cavity.

2. A drill bit for a CNC drilling machine according to claim 1, characterized in that A mounting plate is fixedly installed at one end of the drill body, and the mounting plate cooperates with the inner wall of the mounting cylinder. A mounting block is installed inside the mounting cylinder, and two mounting block fixing pins are fixedly installed on the bottom of the mounting block. Two mounting plate fixing holes are provided inside the top of the mounting plate, and the mounting block fixing pins cooperate with the corresponding mounting plate fixing holes. Fixed threaded holes are provided inside the corresponding sides of the mounting cylinder and the mounting block, and fixing bolts are installed on the internal threads of the fixed threaded holes.

3. A drill bit for a CNC drilling machine according to claim 2, characterized in that A positioning plate is installed on the outside of the mounting block, and mounting tube positioning pins are fixedly installed on both sides of the top of the mounting tube. Two positioning plate positioning holes are provided inside the positioning plate, and the mounting tube positioning pins cooperate with the corresponding positioning plate positioning holes.

4. A drill bit for a CNC drilling machine according to claim 2, characterized in that The interior of the installation cylinder is provided with a hole that matches the installation plate and the installation block.

5. A drill bit for a CNC drilling machine according to claim 1, characterized in that A hole matching with the drill bit body is provided inside the mounting cylinder.

6. A drill bit for a CNC drilling machine according to claim 2, characterized in that The inside of the ferrule is provided with a hole which matches with the mounting cylinder.

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