Drill point type milling cutter for processing PCB (Printed Circuit Board)

Abstract

The utility model relates to the technical field of milling cutters, and discloses a drill point type milling cutter for processing a PCB (Printed Circuit Board), which comprises a milling cutter, a sleeve is fixedly connected to the bottom of the inner wall of the milling cutter, a spring telescopic rod is fixedly connected to the top of the inner wall of the sleeve, a drill bit is fixedly connected to the bottom of the spring telescopic rod, and a positioning groove is formed in the top of the drill bit. The bottom of the sleeve is fixedly connected with a positioning ring, the positioning ring is clamped with the positioning groove, a positioning mechanism is arranged on the inner side of the milling cutter, and the positioning mechanism is used for fixing the device. The spring telescopic rod pushes the drill bit to stretch out of the milling cutter, the drill bit firstly makes contact with a PCB pre-drilling hole, the positioning groove is contracted along with pressing of the milling cutter to be fixed with the positioning ring, drilling explosion can be prevented, drilling is stable, the screw rod is rotated by pressing the rotating disc, a reserved hole is driven to move, and the hollow block is moved when the hollow block is staggered with a milling cutter hole. The milling cutter and equipment can be fixed to improve the firmness.

Description

Technical Field

[0001] The utility model relates to the technical field of milling cutters, in particular to a drill-tip milling cutter for processing PCB boards. Background Art

[0002] PCB board refers to printed circuit board, also known as printed circuit board, which is the support body of important electronic components and electronic devices, and is also the carrier of electrical connection of electronic components. In order to facilitate the processing of PCB board, a drill-tip milling cutter for processing PCB board is needed.

[0003] After searching, the Chinese patent announcement number is: CN206276962U, which discloses a drill-tip type milling cutter for processing aluminum substrates, comprising a cutter body (1) with a milling cutter head (2), the surface of the milling cutter head (2) is formed with a spiral groove (3), the front end of the milling cutter head (2) is formed with a drill point angle, the drill point angle is 129-131 degrees, the circumferential tooth rake angle of the milling cutter is 10-14 degrees, the circumferential tooth rake angle has a blade with a length of 22% of the outer diameter of the milling cutter head (2), and the blade has a back angle of 28-32 degrees. The utility model provides a drill-tip milling cutter for processing aluminum substrates, which has a high-strength cutting edge, is not easy to wear, has a long tool life, and has a low surface roughness of the processed aluminum substrate. However, in actual use, the device cannot be pre-drilled on the PCB board, and the fishtail structure milling cutter is used, resulting in an increased cutting margin. When drilling, the PCB board is easily drilled out, making it unusable, thereby reducing the reliability of the device. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a drill-tip milling cutter for processing PCB boards, aiming to improve the problem in the prior art that the milling cutter is prone to drilling the board when pre-drilling holes cannot be set.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solution: a drill-tip milling cutter for processing PCB boards, comprising a milling cutter, a sleeve fixedly connected to the bottom of the inner wall of the milling cutter, a spring telescopic rod fixedly connected to the top of the inner wall of the sleeve, a drill bit fixedly connected to the bottom of the spring telescopic rod, a positioning groove provided on the top of the drill bit, a positioning ring fixedly connected to the bottom of the sleeve, the positioning ring engaged with the positioning groove, a positioning mechanism provided on the inner side of the milling cutter, and the positioning mechanism used to fix the device.

[0006] Through the above technical solution: with the help of the elastic potential energy of the spring telescopic rod, the drill bit can be pushed out of the outside of the milling cutter. During milling, the drill bit first contacts the pre-drilled hole of the PCB board to improve stability. As the milling cutter applies pressure, the spring telescopic rod contracts, and the positioning groove and the positioning ring are fixed, thereby enhancing the sealing and firmness. Stable drilling can be achieved without pre-drilling, preventing the PCB board from being drilled out, thereby improving the reliability of the device.

[0007] As a further description of the above technical solution:

[0008] The positioning mechanism includes a thread groove, which is opened on the inner top of the milling cutter. The inner thread of the thread groove is connected to a screw rod. The top of the screw rod is rotatably connected to a rotating disk. The bottom of the screw rod is rotatably connected to a hollow block. A reserved hole is opened on the inner top of the milling cutter, and the hollow block is slidably connected to the reserved hole.

[0009] Through the above technical solution: pressing the rotating disk causes the screw to rotate along the thread groove, and the movement of the screw drives the displacement of the reserved hole. When the reserved hole intersects with the hole on the top of the milling cutter, the movable hollow block can fix the milling cutter to the required equipment, thereby improving the firmness of the device when fixed, thereby improving the reliability of the device.

[0010] As a further description of the above technical solution:

[0011] The front and rear sides of the top of the inner wall of the milling cutter are both provided with mounting grooves, and the inner side of the mounting groove is fixedly connected with a rubber ring.

[0012] Through the above technical solution, the firmness of the device fixation can be improved by the friction force of the rubber ring.

[0013] As a further description of the above technical solution:

[0014] The left and right sides of the bottom of the rotating disk are fixedly connected with sliding rods, and the bottom of the sliding rods is slidably connected to the milling cutter.

[0015] Through the above technical solution: through the stability of the sliding rod during movement.

[0016] As a further description of the above technical solution:

[0017] Grooves are provided on the left and right sides of the middle portion of the outer wall of the milling cutter, and a handle is fixedly connected to the inner side of the groove.

[0018] Through the above technical solution: the device can be fixed by the handle.

[0019] As a further description of the above technical solution:

[0020] Positioning blocks are fixedly connected to the left and right sides of the top of the outer wall of the milling cutter, and positioning holes are opened on the outer sides of the positioning blocks.

[0021] Through the above technical solution, the firmness of the device fixation can be improved by the positioning holes on the positioning block.

[0022] As a further description of the above technical solution:

[0023] A first discharge groove is provided on the outer side of the milling cutter, and a second discharge groove is provided on the outer side of the drill bit.

[0024] Through the above technical solution, the milling cutter can be easily discharged and cooled through the discharge groove one and the discharge groove two.

[0025] As a further description of the above technical solution:

[0026] The front and rear sides of the top of the outer wall of the milling cutter are both provided with fixing grooves, and the outer side of the fixing groove is provided with a clamping groove.

[0027] Through the above technical solution: the milling cutter can be fixed through the fixing groove and the clamping groove.

[0028] The utility model has the following beneficial effects:

[0029] 1. In the present invention, the elastic potential energy of the spring telescopic rod can push the drill bit out of the outside of the milling cutter. When the milling cutter is processing, the drill bit first contacts the pre-drilled hole of the PCB board, which improves stability. As the milling cutter applies pressure, the spring telescopic rod contracts, and the positioning groove and the positioning ring are fixed, which enhances sealing and firmness. Stable drilling can be achieved without pre-drilling, preventing the PCB board from being drilled out, thereby improving the reliability of the device.

[0030] 2. In the utility model, by pressing the rotating disk, the screw is rotated according to the thread groove, and the movement of the screw drives the displacement of the reserved hole. When the reserved hole intersects with the hole on the top of the milling cutter, the hollow block is moved to fix the milling cutter to the required equipment, thereby improving the firmness of the device when it is fixed, thereby improving the reliability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a three-dimensional diagram of a drill-tip milling cutter for processing PCB boards proposed in the present invention;

[0032] Figure 2 This is a front view of a drill-tip milling cutter for processing PCB boards proposed in the present invention;

[0033] Figure 3 This is a top view of a drill-tip milling cutter for processing PCB boards proposed in the present invention;

[0034] Figure 4 This is an exploded view of the local structure of a drill-tip milling cutter for processing PCB boards proposed in the utility model;

[0035] Figure 5 This is a disassembled diagram of the positioning mechanism of a drill-tip milling cutter for processing PCB boards proposed in the utility model.

[0036] Legend:

[0037] 1. Milling cutter; 2. Positioning mechanism; 201. Rotating disk; 202. Screw; 203. Hollow block; 204. Reserved hole; 205. Threaded groove; 3. Sleeve; 4. Spring telescopic rod; 5. Drill bit; 6. Positioning ring; 7. Positioning groove; 8. Discharge groove 1; 9. Discharge groove 2; 10. Groove; 11. Handle; 12. Fixing groove; 13. Card slot; 14. Positioning block; 15. Positioning hole; 16. Mounting groove; 17. Rubber ring; 18. Slide rod. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] Reference Figure 1 、 Figure 3 and Figure 4 The utility model provides an embodiment: a drill-tip milling cutter for processing PCB boards, comprising a milling cutter 1, a sleeve 3 fixedly connected to the bottom of the inner wall of the milling cutter 1, a spring telescopic rod 4 fixedly connected to the top of the inner wall of the sleeve 3, a drill bit 5 fixedly connected to the bottom of the spring telescopic rod 4, a positioning groove 7 is formed on the top of the drill bit 5, a positioning ring 6 is fixedly connected to the bottom of the sleeve 3, and the positioning ring 6 is engaged with the positioning groove 7. A positioning mechanism 2 is provided on the inner side of the milling cutter 1, and the positioning mechanism 2 is used to fix the device;

[0040] Specifically, the strong elastic potential energy of the spring telescopic rod 4 can effectively push the drill bit 5 to smoothly extend out of the outside of the milling cutter 1. When the milling cutter 1 is processing, the drill bit 5 will first contact the PCB board, so that the drill bit 5 can pre-drill a hole in the plate, greatly improving the stability during drilling. Subsequently, as the milling cutter 1 applies pressure to the plate, the compression spring telescopic rod 4 will shrink accordingly, so that the positioning groove 7 on the drill bit 5 and the positioning ring 6 are tightly fixed, further improving the sealing and firmness between the drill bit 5 and the milling cutter 1. In this way, even without pre-drilling a hole in the plate in advance, stable drilling can still be performed, effectively preventing the PCB board from being drilled out and becoming unusable, thereby significantly improving the reliability of the device.

[0041] Reference Figure 1 、 Figure 2 and Figure 5 The positioning mechanism 2 includes a thread groove 205, which is provided at the inner top of the milling cutter 1. The inner thread of the thread groove 205 is connected to a screw rod 202, the top of the screw rod 202 is rotatably connected to the rotating disk 201, and the bottom of the screw rod 202 is rotatably connected to the hollow block 203. A reserved hole 204 is provided at the inner top of the milling cutter 1, and the hollow block 203 is slidably connected to the reserved hole 204.

[0042] Specifically, by pressing the rotating disk 201, the screw 202 is connected to the threaded groove 205 through the threaded connection along the rotating disk 201. As the screw 202 moves, the reserved hole 204 can be driven to move. As the reserved hole 204 and the top hole of the milling cutter 1 intersect and intertwine during movement, the milling cutter 1 can be fixed to the required fixed equipment by moving the hollow block 203 to enhance the firmness of the device during fixation, thereby improving the convenience of the device.

[0043] Reference Figure 1 、 Figure 2 and Figure 5 The front and rear sides of the top of the inner wall of the milling cutter 1 are both provided with mounting grooves 16, and a rubber ring 17 is fixedly connected to the inner side of the mounting groove 16; the left and right sides of the bottom of the rotating disk 201 are both fixedly connected to the sliding rod 18, and the bottom of the sliding rod 18 is slidably connected to the milling cutter 1; the left and right sides of the middle part of the outer wall of the milling cutter 1 are both provided with grooves 10, and the inner side of the groove 10 is fixedly connected to the handle 11;

[0044] Specifically, through the mounting groove 16 and the rubber ring 17 fixed on the inside, the friction force can be increased to improve the fixing effect when fixed by the positioning mechanism 2. Through the sliding of the slide rod 18 and the milling cutter 1, the stability of the rotating disk 201 during movement can be improved. Through the handle 11 in the groove 10, the milling cutter 1 can be held for easy replacement and disassembly.

[0045] Reference Figure 1 、 Figure 2 and Figure 4 The left and right sides of the top of the outer wall of the milling cutter 1 are fixedly connected with positioning blocks 14, and the outer side of the positioning block 14 is provided with a positioning hole 15; the outer side of the milling cutter 1 is provided with a discharge groove 8, and the outer side of the drill bit 5 is provided with a discharge groove 2 9; the front and rear sides of the top of the outer wall of the milling cutter 1 are provided with a fixing groove 12, and the outer side of the fixing groove 12 is provided with a clamping groove 13;

[0046] Specifically, by installing a threaded part in the positioning hole 15 in the positioning block 14, the firmness of the device during fixation can be improved. Through the discharge groove 1 8 and the discharge groove 2 9, the waste material can be discharged when the milling cutter 1 is working and heat dissipation can be facilitated to a certain extent. Through the fixing groove 12 and the card groove 13 thereon, the equipment can be conveniently clamped on the milling cutter 1.

[0047] Working principle: Before using the device, you first need to rely on the elastic potential energy of the spring telescopic rod 4. This elastic potential energy can forcefully push the drill bit 5 out of the outside of the milling cutter 1. When the milling cutter 1 starts processing, the drill bit 5 will be the first to contact the PCB board because it is in a leading position. The operation of pre-drilling a hole in the plate by the drill bit 5 can greatly improve the stability during drilling. As the milling cutter 1 applies pressure to the plate, the compressed spring telescopic rod 4 will shrink, so that the positioning groove 7 and the positioning ring 6 on the drill bit 5 can be firmly fixed. This design can enhance the sealing and firmness between the drill bit 5 and the milling cutter 1. Even without pre-drilling holes in the plate in advance, stable drilling operations can be performed, effectively preventing the PCB board from being drilled out and unusable.

[0048] In addition, by pressing the rotating disk 201, the screw 202 can be caused to rotate along the rotating disk 201 by virtue of the threaded connection with the thread groove 205. As the screw 202 moves, the reserved hole 204 can be driven to move accordingly. When the reserved hole 204 intersects or intersects with the hole on the top of the milling cutter 1 during movement, the milling cutter 1 can be firmly fixed to the required fixed equipment by moving the hollow block 203. This fixing method can greatly improve the firmness of the device when fixed, ensuring that the milling cutter 1 can work stably during the processing, without shaking or offsetting, thereby ensuring the processing accuracy and quality and improving work efficiency. At the same time, this design also makes the device safer and more reliable during use, reducing the occurrence of accidents that may be caused by equipment instability. Whether in large-scale production and processing or in small-scale fine processing, this fixing method can play an important role and provide strong support for processing work.

[0049] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A drill tip milling cutter for processing PCB boards, comprising a milling cutter (1), characterized in that: The bottom of the inner wall of the milling cutter (1) is fixedly connected to a sleeve (3), the top of the inner wall of the sleeve (3) is fixedly connected to a spring telescopic rod (4), the bottom of the spring telescopic rod (4) is fixedly connected to a drill bit (5), a positioning groove (7) is provided on the top of the drill bit (5), the bottom of the sleeve (3) is fixedly connected to a positioning ring (6), the positioning ring (6) is engaged with the positioning groove (7), and a positioning mechanism (2) is provided on the inner side of the milling cutter (1), and the positioning mechanism (2) is used to fix the device.

2. The drill tip milling cutter for processing PCB boards according to claim 1, characterized in that: The positioning mechanism (2) comprises a thread groove (205), the thread groove (205) is provided at the inner top of the milling cutter (1), the inner thread of the thread groove (205) is connected to a screw rod (202), the top of the screw rod (202) is rotatably connected to a rotating disk (201), the bottom of the screw rod (202) is rotatably connected to a hollow block (203), a reserved hole (204) is provided at the inner top of the milling cutter (1), and the hollow block (203) is slidably connected to the reserved hole (204).

3. The drill tip milling cutter for processing PCB boards according to claim 2, characterized in that: Mounting grooves (16) are provided on the front and rear sides of the top of the inner wall of the milling cutter (1), and a rubber ring (17) is fixedly connected to the inner side of the mounting groove (16).

4. The drill-tip milling cutter for processing PCB boards according to claim 2, characterized in that: Slide rods (18) are fixedly connected to the left and right sides of the bottom of the rotating disk (201), and the bottom of the slide rod (18) is slidably connected to the milling cutter (1).

5. The drill tip milling cutter for processing PCB boards according to claim 1, characterized in that: Grooves (10) are provided on both the left and right sides of the middle portion of the outer wall of the milling cutter (1), and a handle (11) is fixedly connected to the inner side of the groove (10).

6. The drill-tip milling cutter for processing PCB boards according to claim 1, characterized in that: Positioning blocks (14) are fixedly connected to the left and right sides of the top of the outer wall of the milling cutter (1), and positioning holes (15) are provided on the outer sides of the positioning blocks (14).

7. The drill-tip milling cutter for processing PCB boards according to claim 1, characterized in that: A first discharge groove (8) is provided on the outer side of the milling cutter (1), and a second discharge groove (9) is provided on the outer side of the drill bit (5).

8. The drill-tip milling cutter for processing PCB boards according to claim 1, characterized in that: The front and rear sides of the top of the outer wall of the milling cutter (1) are both provided with fixing grooves (12), and a clamping groove (13) is provided on the outer side of the fixing groove (12).

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