PCB cutting knife

Abstract

When the PCB cutting knife is used, a blade with the cutting acute angle ranging from 25 degrees to 35 degrees is installed on cutting teeth, when a PCB is cut, the blade can be easily inserted into the PCB to form a cutting opening, and along with continuous rotation of the PCB cutting knife, a first cutting part and a second cutting part penetrate into the PCB along the cutting opening, so that the PCB is cut, and the PCB is cut. Due to the fact that the angle of the cutting angle is 30-45 degrees, the first cutting part and the second cutting part can gradually cut into the PCB along the cutting opening, and the cutting force of the first cutting part and the cutting force of the second cutting part are evenly distributed on the surfaces of the two sides of the cutting opening. The first cutting part and the second cutting part penetrate through the thickness of the PCB and cut off the PCB at the position, and the blade made of the diamond has high hardness and abrasion resistance.

Description

Technical Field

[0001] This utility model relates to the field of PCB board cutting blade technology, and in particular to a PCB board cutting blade. Background Technology

[0002] With the development and progress of science and technology, electronic products are becoming increasingly miniaturized, which puts forward higher requirements for the development of the PCB industry. Enterprises usually produce large-scale PCBs and then cut them into smaller pieces. During the production process, the number of PCBs processed is large, and the cutting needs to be done quickly. It is difficult to achieve this goal by relying solely on manual labor, so specialized equipment is needed to automatically and accurately cut PCBs.

[0003] Currently, there are two main methods for cutting and separating PCB boards: one is the V-cut processing method, such as Chinese invention patent application CN115915606A, which discloses a V-cut processing method for printed circuit boards. This method generally involves first cutting a V-shaped groove on one side of the PCB board, removing it, and then cutting a V-shaped groove on the other side. Finally, it requires manual or equipment to break it apart. This processing method has many steps, low production efficiency, and the final product has an uneven cut surface with many burrs. The other method is the die stamping cutting method, such as Chinese invention patent application CN116638590A, which discloses a circuit board blanking and cutting stamping die. This cutting method can complete the cutting in one stamping process, and the cut surface is relatively flat. However, this cutting method generates a lot of waste material, resulting in very high losses and thus high PCB board costs. Utility Model Content

[0004] Therefore, it is necessary to provide a PCB board cutting tool to solve the technical problems mentioned in the background art.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0006] A PCB board cutting tool, comprising:

[0007] The base portion is circular, and a plurality of cutting teeth are spaced apart on the circumferential side of the base portion. The plurality of cutting teeth are inclined in a clockwise or counterclockwise direction. Each cutting tooth includes a first cutting portion and a second cutting portion located on the front and rear sides of the cutting tooth. The ends of the first cutting portion and the second cutting portion away from the base portion intersect at a connecting line. The connecting line is located on the central plane of the base portion. The first cutting portion and the second cutting portion are symmetrically arranged with the central plane as the symmetrical plane. A cutting angle is formed between the first cutting portion and the central plane, and between the second cutting portion and the central plane. The cutting angle is greater than 30° and less than 45°.

[0008] The blade is connected to the top surface of the cutting tooth on one side of its inclined direction. The top of the blade on the side away from the cutting tooth is provided with a cutting acute angle, the size of which is 25°-35°.

[0009] In one embodiment, the PCB board cutting blade further includes a reinforcing portion located at the middle of the upper and lower surfaces of the base portion, the reinforcing portion being integrally formed with the base portion, and the thickness of the base portion being 1.2 to 1.5 times the thickness of the reinforcing portion.

[0010] In one embodiment, a transition slope is provided between the outer edge of the reinforcing portion and the base portion.

[0011] In one embodiment, the cutting tooth has a blade mounting groove on its top surface along one side of its inclined direction, and the blade is fixed in the blade mounting groove.

[0012] In one embodiment, a discharge groove is provided between adjacent cutting teeth, and the discharge groove is in communication with the blade.

[0013] In one embodiment, the discharge trough includes: a first trough wall and a second trough wall connected to each other, the first trough wall being disposed on the surface of the cutting tooth along its inclined direction and located below the blade, and the second trough wall being disposed on the surface of the adjacent cutting tooth away from the inclined direction.

[0014] In one embodiment, both the first and second groove walls are concave arc-shaped surfaces, and the curvature of the second groove wall is relatively gentler than that of the first groove wall.

[0015] In one embodiment, the PCB board cutting blade further includes: a cutting blade fixing hole and a cutting blade mounting hole penetrating the base portion and the reinforcing portion, wherein the cutting blade fixing hole is located at the center of the base portion, and the cutting blade mounting holes are multiple and evenly distributed on the outer side of the cutting blade fixing hole.

[0016] The beneficial effects of this utility model are as follows: By setting the cutting angle of the first and second cutting parts in the cutting teeth to 30°-45°, and installing a blade with a cutting acute angle of 25°-35° on the cutting teeth, when cutting the PCB board, the blade can easily insert into the PCB board to form an opening. As the PCB board cutting blade continues to rotate, the first and second cutting parts penetrate into the PCB board along the cutting opening. Since the cutting angle is set to 30°-45°, the first and second cutting parts can gradually cut into the PCB board along the cutting opening, so that the cutting force of the first and second cutting parts is evenly distributed on both sides of the cutting opening until the first and second cutting parts penetrate the thickness of the PCB board and cut the PCB board at that position. Moreover, the diamond blade has high hardness and wear resistance. The high hardness of the diamond material can ensure that the blade can cut effectively without dulling when cutting the PCB board, reducing the generation of rough surfaces on the PCB board, thereby reducing the damage and burr generation of the PCB board edges. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a PCB board cutting blade according to one embodiment;

[0019] Figure 2 for Figure 1 An enlarged structural diagram at point A;

[0020] Figure 3 This is a top view of a PCB board cutting blade according to one embodiment;

[0021] Figure 4 for Figure 3 A magnified structural diagram at point B;

[0022] Figure 5 This is a schematic diagram of the connection state between the blade and the cutting teeth in one embodiment.

[0023] In the attached diagram, 10 is the base; 20 is the cutting tooth; 21 is the first cutting part; 22 is the second cutting part; 23 is the cutting angle; 24 is the unloading groove; 241 is the first groove wall; 242 is the second groove wall; 25 is the blade mounting groove; 26 is the cutting blade mounting hole; 27 is the cutting blade fixing hole; 28 is the connecting line; 30 is the blade; 40 is the reinforcing part; 41 is the transition slope; and α is the cutting acute angle. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other. The technical solutions of the present invention will be further described below with reference to the accompanying drawings of the embodiments. The present invention is not limited to the specific embodiments described below.

[0025] It should be understood that the same or similar reference numerals in the accompanying drawings of the embodiments correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "front," "rear," "left," "right," "top," and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0026] In one embodiment, such as Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, a PCB board cutting blade includes a base portion 10 and a blade 30. The base portion 10 is circular, and a plurality of cutting teeth 20 are spaced apart on the circumferential side of the base portion 10. The plurality of cutting teeth 20 are inclined in a clockwise or counterclockwise direction. Each cutting tooth 20 includes a first cutting portion 21 and a second cutting portion 22 located on the front and rear sides of the cutting tooth 20. The ends of the first cutting portion 21 and the second cutting portion 22 away from the base portion 10 intersect at a connecting line 28. The connecting line 28 is located on the base portion. On the central plane of 10, the first cutting part 21 and the second cutting part 22 are symmetrically arranged with the central plane as the center plane. A cutting angle 23 is formed between the first cutting part 21 and the central plane, and between the second cutting part 22 and the central plane. The cutting angle 23 is greater than 30° and less than 45°. The blade 30 is connected to the top surface of the cutting tooth 20 along its inclined direction. The top of the side of the blade 30 away from the cutting tooth 20 is provided with a cutting acute angle α. The size of the cutting acute angle α is 25°-35°.

[0027] Specifically, in use, the base portion 10 is mounted on the cutting device. When the cutting teeth 20 are tilted clockwise, the base portion 10 is driven to rotate clockwise to drive the cutting teeth 20 and the blade 30 to cut the PCB board. Since the blade 30 is located on the top of the cutting teeth on one side in the clockwise direction, and is... Figure 5It is known that the blade 30 has a cutting acute angle α on the top side away from the cutting tooth 20. Therefore, during cutting, the cutting acute angle α of the blade 30 first contacts the PCB board and easily inserts into the PCB board to form a cutting opening. Since the blade 30 is made of diamond, it has high hardness and wear resistance, which ensures that when inserted into the PCB board, the blade 30 can effectively form a cutting opening on the PCB board without wear and dulling. As the cutting blade continues to rotate, the first cutting part 21 and the second cutting part 22 penetrate into the PCB board along the cutting opening. Since the angle of the cutting angle 23 is set to 30°-45°, the first cutting part 21 and the second cutting part 22 can gradually cut into the PCB board along the cutting opening, so that the cutting force of the first cutting part 21 and the second cutting part 22 is evenly distributed on both sides of the cutting opening until the first cutting part 21 and the second cutting part 22 penetrate the thickness of the PCB board and cut the PCB board at that position.

[0028] In this embodiment, through the above-mentioned settings, on the one hand, the blade 30 is made of diamond, which is low in cost, and the cutting acute angle α of the blade 30 is easy to insert into the PCB board to form a cutting opening, avoiding the situation where the first cutting part 21 and the second cutting part 22 are directly inserted into the PCB board at a large angle, resulting in large friction; on the other hand, since the blade 30 first forms a cutting opening on the PCB board, the first cutting part 21 and the second cutting part 22 can be set with a large cutting angle, and the first cutting part 21 and the second cutting part 22 are symmetrically arranged so that the cutting force of the cutter is evenly distributed on both sides of the cutting opening of the PCB board, thereby enabling continuous and stable cutting of the PCB board, reducing the wear of the first cutting part 21 and the second cutting part 22 and the occurrence of burrs on the PCB board cutting surface, resulting in a smooth cutting surface, and enabling cutting and separating of boards in one cutting operation, thus achieving high production efficiency.

[0029] Preferably, in addition to reducing burrs generated during PCB cutting, the depths of the first cutting section 21 and the second cutting section 22 can be set according to production needs. By setting different depths, various cutting requirements can be met. For example, when cutting thick PCBs, the depth can be set to be larger, while when cutting thin PCBs, the depth can be set to be smaller.

[0030] In one embodiment, such as Figure 1As shown, the PCB board cutting blade further includes a reinforcing part 40, which is located in the middle of the upper and lower surfaces of the base part 10. The reinforcing part 40 is integrally formed with the base part 10, and the thickness of the base part 10 is 1.2 to 1.5 times the thickness of the reinforcing part 40. Specifically, the reinforcing part 40 protrudes from the base part 10, which can reduce the thickness of the base part 10 and thus the thickness of the cutting teeth. When cutting the PCB board, it can reduce the cutting resistance and the waste of PCB board material. On the other hand, by setting the reinforcing part 40, the reinforcing part 40 can be regarded as a support between the base part 10 and the cutting device, which can enhance the overall strength of the cutting blade and reduce the risk of blade damage.

[0031] In one embodiment, such as Figure 1 As shown, a transition slope 41 is provided between the outer edge of the reinforcing part 40 and the base part 10. Specifically, the transition slope 41 enables a smooth transition between the reinforcing part 40 and the base part 10, preventing waste generated during PCB board cutting from accumulating at the junction of the reinforcing part 40 and the base part 10.

[0032] In one embodiment, such as Figure 2 The cutting tooth 20 shown has a blade mounting groove 25 on its top surface along one side of its inclined direction, and the blade 30 is welded to the cutting tooth 20 through the blade mounting groove 25.

[0033] In one embodiment, such as Figure 1 , Figure 3 and Figure 4As shown, a discharge groove 24 is provided between adjacent cutting teeth 20. The discharge groove 24 is connected to the blade 30. The discharge groove 24 includes a first groove wall 241 and a second groove wall 242 connected to each other. The first groove wall 241 is disposed on the surface of the cutting tooth 20 along its inclined direction and located below the blade 30. The second groove wall 242 is disposed on the surface of the adjacent cutting tooth 20 away from the inclined direction. Specifically, since both the first groove wall 241 and the second groove wall 242 are concave arc surfaces, and the curvature of the second groove wall 242 is relatively gentle compared to the curvature of the first groove wall 241, the concave arc design of the discharge groove 24 can better guide the debris or waste during the cutting process. Since the curvature of the first groove wall 241 is relatively steep, the debris generated when cutting the PCB board can quickly enter the second groove wall 242 along the steep first groove wall 241. The curvature of the second groove wall 242 is relatively gentle, which allows the debris to be distributed along the arc surface of the second groove wall 242 and smoothly discharged from the discharge groove 24 along the second groove wall 242. This avoids the accumulation of debris between the cutting teeth 20 during the cutting process, reduces the friction and resistance between the cutting tool and the material during cutting, improves the smoothness of cutting, and extends the service life of the PCB board cutting tool.

[0034] In one embodiment, such as Figure 1 As shown, the PCB board cutting blade also includes a cutting blade mounting hole 26 and a cutting blade fixing hole penetrating the base portion 10 and the reinforcing portion 40. The cutting blade fixing hole 27 is located at the center of the base portion 10, and there are multiple cutting blade mounting holes 26 evenly distributed on the outer side of the cutting blade fixing hole 27. Specifically, the base portion 10 can be mounted on the cutting device through the cutting blade mounting hole 26 and the cutting blade fixing hole 27, thereby facilitating the subsequent cutting of the PCB board.

[0035] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A PCB board cutting blade, characterized in that, include: The base part (10) is circular. Multiple cutting teeth (20) are provided at intervals on the circumferential side surface of the base part (10). The multiple cutting teeth (20) are inclined in a clockwise or counterclockwise direction. Each cutting tooth (20) includes a first cutting part (21) and a second cutting part (22) located on the front and rear sides of the cutting tooth (20). The ends of the first cutting part (21) and the second cutting part (22) away from the base part (10) intersect at a connecting line (28). The connecting line (28) is located on the central plane of the base part (10). The first cutting part (21) and the second cutting part (22) are symmetrically arranged with the central plane as the symmetrical face. A cutting angle (23) is formed between the first cutting part (21) and the central plane, and between the second cutting part (22) and the central plane. The cutting angle (23) is greater than 30° and less than 45°. The blade (30) is connected to the top surface of the cutting tooth (20) on one side of its inclined direction. The top of the blade (30) away from the cutting tooth (20) is provided with a cutting acute angle (α), the size of which is 25°-35°.

2. The PCB board cutting blade according to claim 1, characterized in that, Also includes: The reinforcing part (40) is located in the middle of the upper and lower surfaces of the base part (10). The reinforcing part (40) is integrally formed with the base part (10). The thickness of the base part (10) is 1.2 to 1.5 times the thickness of the reinforcing part (40).

3. The PCB board cutting blade according to claim 2, characterized in that, A transition slope (41) is provided between the outer edge of the reinforcing part (40) and the base part (10).

4. The PCB board cutting blade according to claim 1, characterized in that, The cutting tooth (20) has a blade mounting groove (25) on its top surface along one side of its inclined direction, and the blade (30) is fixed in the blade mounting groove (25).

5. The PCB board cutting blade according to claim 4, characterized in that, A discharge groove (24) is provided between adjacent cutting teeth (20), and the discharge groove (24) is connected to the blade (30).

6. The PCB board cutting blade according to claim 5, characterized in that, The discharge trough (24) includes a first trough wall (241) and a second trough wall (242) connected to each other. The first trough wall (241) is disposed on the surface of the cutting tooth (20) along its inclined direction and located below the blade (30). The second trough wall (242) is disposed on the surface of the adjacent cutting tooth (20) away from the inclined direction.

7. The PCB board cutting blade according to claim 6, characterized in that, Both the first groove wall (241) and the second groove wall (242) are concave arc surfaces, and the curvature of the second groove wall (242) is relatively gentle compared to the curvature of the first groove wall (241).

8. The PCB board cutting blade according to claim 2, characterized in that, It also includes a cutting blade fixing hole (27) and a cutting blade mounting hole (26) penetrating the base part (10) and the reinforcing part (40). The cutting blade fixing hole (27) is located at the center of the base part (10), and there are multiple cutting blade mounting holes (26) evenly distributed on the outside of the cutting blade fixing hole (27).

Images