CN218611880U - Printed circuit board reaming milling cutter - Google Patents
Printed circuit board reaming milling cutter Download PDFInfo
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- CN218611880U CN218611880U CN202223068710.7U CN202223068710U CN218611880U CN 218611880 U CN218611880 U CN 218611880U CN 202223068710 U CN202223068710 U CN 202223068710U CN 218611880 U CN218611880 U CN 218611880U
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- cutting
- groove
- cutting part
- milling cutter
- circuit board
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Abstract
The utility model relates to a printed circuit board reaming milling cutter, including stalk portion and the shaping in the cutting part of stalk portion front end, its characterized in that, the front end mid point both sides of cutting part extend twice drilling cutting portion, form spiral chip groove at the rear side of drilling cutting portion on the cutting part, form the side edge that extends to the stalk portion on the chip groove, the edge of a knife orientation of side edge is the same with the direction of spiral of chip groove, is equipped with the helicla flute on the cutting part and cuts apart into a plurality of sword pieces with the side edge on the cutting part. The milling cutter of the utility model is provided with the side edge on the cutting part, the cutter block on the cutting part can simultaneously carry out cutting processing on the hole wall, and the generated scraps can be taken out through the spiral groove and can not be accumulated on the chip groove to influence the cutting effect, thus being convenient for processing the hole with special shape on the multi-chip circuit board at one time without repeated action of multiple feeding, and having high production efficiency; additionally, the utility model discloses a milling cutter can also utilize the sword piece of its side to maintain the edge in circuit board or hole, and is functional strong.
Description
Technical Field
The utility model relates to a milling cutter technical field specifically is a printed circuit board reaming milling cutter.
Background
Printed circuit boards are generally made of glass fiber reinforced epoxy resin and coated with a layer of copper, which is then photo-etched as needed to complete the circuit. The printed circuit board is drilled in a series of locations to connect and insert any discrete or integrated electronic components between the nodes in the circuits formed on both sides of the printed circuit board.
In order to facilitate the realization of the batch processing production of the printed circuit board substrates, a plurality of circuit boards are generally integrally stacked together and then a drilling tool is used for drilling the circuit boards at one time, but the current drilling tool generally cuts by a cutting edge at the end part and removes scraps from a scrap discharge groove at one side, however, the drilling tool is only suitable for common regular round holes, feeding is needed in the processing process of some long holes or other irregular holes, and if the secondary cutting edge on the side surface of a milling cutter is used for reaming, the produced scraps are easy to be accumulated in the scrap discharge groove and are difficult to discharge, so that the cutting effect is influenced; although the problems can be avoided by adopting a layer-by-layer turn-milling machining mode, the repeated feed process is more, and the production efficiency is low.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an it is not enough to overcome above-mentioned condition, aims at providing the technical scheme that can solve above-mentioned problem.
A reaming milling cutter for printed circuit boards comprises a shank and a cutting part formed at the front end of the shank, wherein two drilling cutting parts extend from two sides of the midpoint of the front end of the cutting part, a spiral chip groove is formed in the rear side of the drilling cutting part on the cutting part, a side edge extending to the shank is formed on the chip groove, the edge direction of the side edge is the same as the spiral direction of the chip groove, and a spiral groove is formed in the cutting part to divide the side edge into a plurality of cutter blocks on the cutting part.
Furthermore, the front end of the blade part is provided with a grinding groove at one side of the drilling and cutting part.
Furthermore, the axial section of the spiral groove is in a trapezoidal shape with a wide upper part and a narrow lower part, and fillets are arranged on two sides of the bottom of the spiral groove.
Furthermore, the knife edge of the drilling cutting part protrudes by 3-4 degrees.
Optionally, two ends of the handle are respectively provided with a section of blade.
Compared with the prior art, the utility model discloses the beneficial effect who gains does: the milling cutter of the utility model is provided with the side edge on the cutting part and divides the side edge into a plurality of cutter blocks, when the reaming processing of the circuit board is carried out, the cutter blocks on the cutting part can simultaneously carry out cutting processing on the hole wall, and the generated scraps can be brought out through the spiral groove and can not be accumulated on the chip groove to influence the cutting effect, thereby being convenient for processing the hole with special shape on the multi-chip circuit board at one time without carrying out repeated action of multiple feeding, and having high production efficiency; in addition, the novel milling cutter can also be used for finishing the edge of a circuit board or a hole by utilizing the cutter block on the side surface, and the functionality is strong.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor.
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of the middle spiral groove of the present invention.
Fig. 3 is a schematic structural diagram of the middle drilling cutting portion of the present invention.
Fig. 4 is a schematic structural diagram of embodiment 1 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, a reaming milling cutter for printed circuit boards includes a shank 1 and a blade 2 formed at the front end of the shank 1, two drilling cutting portions 21 are extended from two sides of the center point of the front end of the blade 2, a spiral chip groove 22 is formed at the rear side of the drilling cutting portion 21 on the blade 2, a side edge extending to the shank 1 is formed on the chip groove 22, the edge of the side edge faces in the same spiral direction as the chip groove 22, and a spiral groove 23 is formed on the blade 2 to divide the side edge into a plurality of cutter blocks 24 on the blade 2. The milling cutter of the utility model is provided with the side edge on the cutting part 2 and divides the side edge into a plurality of cutter blocks 24, when the hole expanding processing of the circuit board is carried out, the cutter blocks 24 on the cutting part 2 can simultaneously carry out cutting processing on the hole wall, and the generated scraps can be taken out through the spiral groove 23 and can not be accumulated on the chip groove 22 to influence the cutting effect, so that the hole with special shape can be processed on the multi-chip circuit board at one time without repeated operation of multiple feeding, and the production efficiency is high; in addition, the novel milling cutter can also be used for finishing the edge of a circuit board or a hole by utilizing the cutter block 24 on the side surface, and the functionality is strong.
Further, the front end of the blade 2 is provided with a dressing groove 25 on the side of the drilling and cutting portion 21. As shown in fig. 1, the thinning groove 25 is formed in two planes inclined from the front end surface of the blade portion 2, and the edge of the drill cutting portion 21 is easily ground and kept sharp by a tool such as a file by the thinning groove 25.
Furthermore, a groove for clamping the milling cutter is arranged on the handle part 1. The shape and structure of the groove are designed and selected for the purpose of facilitating the clamping of the tool bit, such as a strip-shaped groove, an annular groove, a circular groove and the like.
Further, the axial section of the spiral groove 23 is in a trapezoidal shape with a wide top and a narrow bottom, and both sides of the bottom of the spiral groove 23 are provided with round corners. The spiral groove 23 is in a trapezoidal shape, so that scraps can fall into the spiral groove 23, the phenomenon that the scraps are accumulated in the scrap discharge groove 22 to cause blockage is avoided, and the cutting effect is ensured.
Further, as shown in fig. 3, the edge of the drilling cutting portion 21 protrudes by 3 to 4 degrees, so that an acute angle is formed at the edge of the cutting portion, which is beneficial to improving the cutting capability of the edge to the workpiece and prolonging the service life of the milling cutter.
[ example 1 ] A method for producing a polycarbonate
As shown in fig. 4, in an embodiment of the present invention, a blade 2 is provided at each end of a shank 1. Wherein, the blade parts 2 at the two ends can be designed into diameters of different specifications, thereby being applicable to different processing requirements and improving the applicability of products.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (5)
1. The reaming milling cutter for the printed circuit board comprises a handle part and a blade part formed at the front end of the handle part, and is characterized in that two drilling and cutting parts extend from two sides of the midpoint of the front end of the blade part, a spiral chip groove is formed in the rear side of the drilling and cutting parts on the blade part, a side edge extending to the handle part is formed on the chip groove, the edge of the side edge faces in the same spiral direction as the chip groove, and a spiral groove is formed in the blade part to divide the side edge into a plurality of cutter blocks on the blade part.
2. A pcb reaming cutter according to claim 1, wherein the front end of the blade portion is provided with a dressing groove at one side of the drilling and cutting portion.
3. The reaming milling cutter for printed circuit boards as claimed in claim 1, wherein the axial cross section of the spiral groove is in a trapezoidal shape with a wide top and a narrow bottom, and the bottom of the spiral groove is rounded at both sides.
4. A pcb reaming cutter according to claim 1, wherein the cutting edge of the drilling cutting portion protrudes 3-4 °.
5. A PCB reaming cutter according to any one of claims 1 to 4, wherein the shank is provided at each end with a blade portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223068710.7U CN218611880U (en) | 2022-11-19 | 2022-11-19 | Printed circuit board reaming milling cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223068710.7U CN218611880U (en) | 2022-11-19 | 2022-11-19 | Printed circuit board reaming milling cutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218611880U true CN218611880U (en) | 2023-03-14 |
Family
ID=85448846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223068710.7U Active CN218611880U (en) | 2022-11-19 | 2022-11-19 | Printed circuit board reaming milling cutter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218611880U (en) |
-
2022
- 2022-11-19 CN CN202223068710.7U patent/CN218611880U/en active Active
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