High frequency or high speed PCB sheet forming tool

Abstract

The utility model relates to a high-frequency or high-speed PCB sheet forming tool, comprising a handle part and a blade part, wherein a spiral cutting groove and 4-7 spiral cutting grooves are provided on the outer circle of the blade part, wherein the spiral cutting groove is a right-handed groove and the spiral cutting groove is a left-handed groove, and a cutting edge with a trapezoidal cross-section is formed on the blade part corresponding to two adjacent layers of spiral cutting grooves and the part between two adjacent spiral cutting grooves. The utility model solves the problem of short service life of traditional high-frequency milling cutters, prolongs service life and reduces cost investment under the premise of ensuring cutting quality.

Description

Technical Field

[0001] The utility model relates to a milling cutter, and specifically discloses a high-frequency or high-speed PCB plate forming cutter used in a PCB manufacturing process. Background Art

[0002] When designing the material number of the optical communication module, in order to improve the performance of the communication signal, high-frequency or high-speed PCB materials are often used when designing the circuit board. When manufacturing such PCB materials, more fillers are added between the glass fibers to reduce the impact of noise on signal transmission. Such fillers generally use materials containing silica and aluminum hydroxide. Such materials have high hardness. During normal molding processing, the milling cutter wears quickly, which can easily cause the cutter to break and the surface substrate to fall off during the production process.

[0003] At present, the industry has specially designed high-frequency milling cutters for this type of plate. This type of milling cutter has deep, dense and sharp teeth, strong cutting performance, and can effectively improve the problem of the substrate layer falling off at the edge of the plate. However, due to the small proportion of the residual core in the blade, the milling cutter has low strength, wears quickly and has a short life, and the cost of use is relatively high. Summary of the invention

[0004] The utility model aims to overcome the deficiencies in the prior art and to provide a high-frequency or high-speed plate forming cutter which can extend the service life and reduce the production cost while ensuring the cutting performance.

[0005] According to the technical solution provided by the utility model, the high-frequency or high-speed sheet metal forming tool comprises a shank part and a blade part, and a spiral breaking groove and 4-7 spiral cutting grooves are provided on the outer circle of the blade part, the spiral breaking groove is a right-handed groove, and the spiral cutting groove is a left-handed groove, and a cutting edge with a trapezoidal cross-sectional shape is formed on the blade part and corresponding to the part between two adjacent layers of spiral breaking grooves and two adjacent spiral cutting grooves.

[0006] Preferably, the angle a between the spiral cutting groove and the axis of the blade portion is 85-88°.

[0007] Preferably, the angle b between the spiral cutting groove and the axis of the blade portion is 12-18°.

[0008] Preferably, the cutting edge width W of the cutting edge is 1 / 6 to 1 / 4 of the outer diameter of the cutting edge portion.

[0009] More preferably, the cutting edge width W of the cutting edge is 1 / 5 of the outer diameter of the cutting edge portion.

[0010] Preferably, the height of the cutting edge is 1 / 7 to 1 / 5 of the outer diameter of the blade portion.

[0011] Further preferably, the height of the cutting edge is 1 / 6 of the outer diameter of the blade portion.

[0012] The utility model solves the problem of short service life of traditional high-frequency milling cutters, prolongs service life and reduces cost investment under the premise of ensuring cutting quality. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0014] Figure 2 It is an enlarged view of the blade part in the utility model. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0016] A high frequency or high speed sheet metal forming tool, such as Figure 1-2 As shown, it includes a handle part 1 and a blade part 2, and a spiral cutting groove 21 and 4-7 spiral cutting grooves 22 are opened on the outer circle of the blade part 2. The spiral cutting groove 21 is a right-handed groove, and the spiral cutting groove 22 is a left-handed groove. On the blade part 2 and corresponding to the part between two adjacent layers of spiral cutting grooves 21 and two adjacent spiral cutting grooves 22, a cutting edge 23 with a trapezoidal cross-section is formed. One spiral cutting groove 21 is more conducive to cutting the glass fiber in the PCB board, and has a very good cutting effect. 4-7 spiral cutting grooves 22 are more conducive to the discharge of PCB board cutting debris and reduce the accumulation of debris.

[0017] The angle a between the spiral cutting groove 21 and the axis of the blade portion 2 is 85-88°, which makes the arrangement gap of each cutting edge 23 smaller, making it easier to cut the glass fiber in the PCB board.

[0018] The angle b between the spiral cutting groove 22 and the axis of the blade portion 2 is 12-18°. The small spiral angle of the cutting groove makes it easier and faster to discharge the cut debris out of the PCB board, and can prevent the debris from being rubbed against the edge of the PCB board due to failure to be discharged in time, resulting in adhesion to the cutting edge 23 and being unable to be discharged out of the PCB board.

[0019] The cutting edge width W of the cutting edge 23 is 1 / 6 to 1 / 4 of the outer diameter of the cutting edge portion 2, and the cutting edge width W of the cutting edge 23 is preferably 1 / 5 of the outer diameter of the cutting edge portion 2. A smaller cutting edge width can reduce the cutting edge breakage caused by excessive force during cutting of the cutting edge 23.

[0020] The height of the cutting edge 23 is 1 / 7 to 1 / 5 of the outer diameter of the blade part 2, and the height of the cutting edge 23 is 1 / 6 of the outer diameter of the blade part 2. This increases the proportion of the residual core (the residual core is the remaining part of the blade part 2 after removing the cutting edge 23) in the blade part 2, increases the force strength during the cutting process, reduces the possibility of blade breakage, slows wear and prolongs the service life, and has a relatively low cost of use.

[0021] The high-frequency or high-speed plate forming cutter of the utility model is made of tungsten steel rods.

[0022] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A high-frequency or high-speed PCB sheet forming tool, comprising a handle portion (1) and a blade portion (2), wherein: The outer circle of the blade portion (2) is provided with a spiral breaking groove (21) and 4 to 7 spiral cutting grooves (22), the spiral breaking groove (21) is a right-handed groove, and the spiral cutting groove (22) is a left-handed groove. A cutting edge (23) having a trapezoidal cross-sectional shape is formed on the blade portion (2) and in a portion corresponding to two adjacent layers of spiral breaking grooves (21) and between two adjacent spiral cutting grooves (22).

2. The high-frequency or high-speed PCB sheet forming tool as claimed in claim 1, characterized in that: The included angle a between the spiral cutting groove (21) and the axis of the blade portion (2) is 85-88°.

3. The high-frequency or high-speed PCB sheet forming tool as claimed in claim 1, characterized in that: The degree of the angle b between the spiral cutting groove (22) and the axis of the blade portion (2) is 12-18°.

4. The high-frequency or high-speed PCB sheet forming tool as claimed in claim 1, characterized in that: The cutting edge width W of the cutting edge (23) is 1 / 6 to 1 / 4 of the outer diameter of the cutting edge portion (2).

5. The high-frequency or high-speed PCB sheet forming tool as claimed in claim 4, characterized in that: The cutting edge width W of the cutting edge (23) is 1 / 5 of the outer diameter of the cutting edge portion (2).

6. The high-frequency or high-speed PCB sheet forming tool as claimed in claim 4, characterized in that: The height of the cutting edge (23) is 1 / 7 to 1 / 5 of the outer diameter of the blade portion (2).

7. The high-frequency or high-speed PCB sheet forming tool as claimed in claim 6, characterized in that: The height of the cutting edge (23) is 1 / 6 of the outer diameter of the blade portion (2).

Images