CN217775670U

CN217775670U - Double-edge-angle drilling tool for PCB

Info

Publication number: CN217775670U
Application number: CN202221010030.7U
Authority: CN
Inventors: 陈振; 王美其; 李冬果
Original assignee: Shenzhen Yixin Technology Co ltd
Current assignee: Shenzhen Yixin Technology Co ltd
Priority date: 2022-04-28
Filing date: 2022-04-28
Publication date: 2022-11-11
Anticipated expiration: 2032-04-28

Abstract

The utility model provides a PCB is with two cutting edge angle drilling tool, it includes drill handle and drill edge, the front end of drill edge is equipped with the drill tip, the middle part of one side of drill tip is equipped with interconnect's first back knife face and second back knife face, be equipped with two chip grooves on the drill edge, first back knife face, second back knife face are bellied curved surface, form first cutting edge and second cutting edge between the outside of first back knife face and the chip groove, form first cutting edge, second cutting edge between first back knife face and the drill edge end plane at first cutting edge, second cutting edge place respectively, first cutting edge is 120-165, the second cutting edge is 80-120. Adopt the technical scheme of the utility model, increased the second frontal angle of specific angle, lengthened PCB boring tool cutting edge length, attenuate the cutting thickness of second cutting edge simultaneously, reduced export axial force, effectively restrained defects such as export tear, burr.

Description

Double-edge-angle drilling tool for PCB

Technical Field

The utility model relates to a drilling tool especially relates to a PCB is with two cutting edge of a knife or a sword angle drilling tool.

Background

Burrs are the terms of metal casting, milling and electroplating, and generally, scraps and microscopic metal particles on the surface of a metal part appear, and are called burrs. The more burrs are, the lower the quality standard is, so when an enterprise produces products, the method can be used for reducing the burrs as much as possible. The CCL copper-clad plate used by the PCB has copper foils on the surface and in the plate, and when the axial force of the cutter outlet is larger, the convex deformation of the copper foils is caused, and the longitudinal layering length is increased, so that the defects of tearing, burrs and the like of the outlet are caused. The main harm of the burrs of the printed circuit board is to reduce the quality of the product, make the product not very beautiful, weaken the outgoing strength of signals, reduce the transmission distance, easily cause signal interference, reduce the mechanical strength of the product, and easily fall off to cause other problems.

SUMMERY OF THE UTILITY MODEL

To the technical problem, the utility model discloses a PCB is with two cutting edge of a knife or a sword angle drilling tools has solved current PCB panel export burr, the continuous problem of glass fiber cutting.

To this end, the technical scheme of the utility model is that:

the utility model provides a PCB is with two cutting edge angle drilling tool, its includes drill handle and drill edge, the front end of drill edge is equipped with the drill edge, the middle part of one side of drill edge is equipped with the first back knife face and the second back knife face of interconnect, be equipped with two chip grooves on the drill edge, first back knife face, second back knife face are bellied curved surface, form first cutting edge and second cutting edge between the outside of first back knife face and the chip groove, form first cutting edge, second cutting edge between the first back knife face at first cutting edge place, the first back knife face at second cutting edge place and the drill edge end plane respectively, first cutting edge is 120-165, the second cutting edge is 80-120;

the drill bit is provided with two chip grooves which are of a symmetrical distribution structure, a confluence parallel structure or a structure with one long chip and one short chip.

By adopting the technical scheme, the double-cutting-edge angle structure with a specific angle is adopted, the cutting edge length of the drilling tool is increased, the cutting thickness of the second cutting edge is reduced, the axial force of an outlet is reduced, the longitudinal layering length of the convex deformation of the plate is reduced, and the defects of tearing of the outlet, burrs and the like are effectively overcome. Wherein, the second edge is too little, can lead to drill point axial length overlength, can influence the bottom plate entering volume at the PCB trade drilling in-process, when drill point axial length is greater than the bottom plate entering volume, can lead to the panel aperture little, and then leads to panel to scrap, consequently when setting up second edge angle, and the PCB board is generally not thick, so after considering bottom plate thickness, adopt the second edge is 80-120 can improve the quality of drilling to reduce the disability rate simultaneously.

Furthermore, the two chip grooves are of a confluence parallel structure. The chip groove is positioned at the other side of the drill tip.

As a further improvement of the utility model, the knife face of the drill point is a double-edge symmetrical knife face or a single-edge triangular knife face.

As a further improvement of the utility model, the angle of the first back knife face is 10 degrees to 15 degrees, and the angle of the second back knife face is 25 degrees to 35 degrees.

As a further improvement of the present invention, the first flank angle is 12 °, and the second flank angle is 30 °.

As a further improvement of the utility model, the helix angle of the chip groove is a single helix angle or a variable helix angle, the angle of the single helix angle is 24-45 degrees, and the angle of the variable helix angle is 38-51 degrees.

As a further improvement of the present invention, the helical angle of the chip groove is a variable helical angle, and the chip groove adopts a helical angle of 42 ° in collocation and a helical angle of 51 ° in turn.

As a further improvement of the utility model, the first frontal angle is 130-165 degrees, and the second frontal angle is 80 degrees.

Compared with the prior art, the beneficial effects of the utility model are that:

adopt the technical scheme of the utility model, on the basis of current PCB boring tool list frontal angle, the second frontal angle has been increased, PCB boring tool cutting edge length has been lengthened, the thickness of cutting of second cutting edge has been attenuate simultaneously, the export axial force has been reduced, reduce the protruding vertical layering length that warp of panel, effectively restrained the export and torn, defects such as burr, the second cutting edge has been equivalent to the effect of essence cutting and essence repair, the glass fiber who pushes out in the hole can be amputated, the quality of drilling export is improved, the defective rate is reduced.

Drawings

Fig. 1 is a schematic structural view of a dual-edge drilling tool for a PCB according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of a drill blade according to an embodiment of the present invention.

The reference numerals include:

1-drill handle, 2-drill blade;

20-chip flute, 21-drill tip, 22-first flank face, 23-second flank face, 24-first cutting edge, 25-second cutting edge.

Detailed Description

Preferred embodiments of the present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 and 2, a double-edge drilling tool for PCB, it includes drill handle 1, drill edge 2, the end of drill edge 2 is provided with drill tip 21, be provided with two chip grooves 20 on the drill edge 2, drill tip 21 is equipped with interconnect's first back tool face 22 and second back tool face 23, first back tool face 22 and second back tool face 23 are located the both sides of drill tip 21 head central line respectively, be equipped with two chip grooves 20 on the drill edge, first back tool face 22, second back tool face 23 are bellied curved surface, form first cutting edge 24 and second cutting edge 25 between the outside of first back tool face 22 and the chip groove 20, form first edge angle between first back tool face 22 and the drill edge end plane that first cutting edge 24 belonged to, form the second edge angle between first back tool face 22 and the drill edge end plane that second cutting edge 25 belonged to. Wherein, the end plane is the radial plane of the drill edge 2, that is, the drill edge 2 stands up, and the horizontal plane is the end plane. The first acute angle is 120-165 degrees, and the second acute angle is 80-120 degrees; that is, the drill tip 21 has a double-edge structure, the first cutting edge 24 is located at the first edge, and the second cutting edge 25 is located at the second edge. The length of the cutting edge can be increased by adopting a double-edge-angle structure, the cutting force of the drilling tool is increased, the second edge angle is reduced, the cutting thickness of the outer edge can be reduced by adopting 80-120 degrees, the cutting axial force is reduced, the entering amount of the drilling hole entering the PCB is considered, and the reject ratio is reduced while the outlet quality of the drilling hole is improved.

The drill point knife face can be selected from a double-edge symmetrical knife face or a single-edge triangular knife face which is commonly used in the industry, and the double-edge symmetrical knife face is adopted in the embodiment.

The two chip flutes 20 are in a symmetrical distribution structure or a converging parallel structure or a long-short structure, and the converging parallel structure is adopted in the embodiment.

Preferably, the double-edge angle structure has a large first edge angle and a small second edge angle, the first edge angle is 130 degrees, and the second edge angle is 80 degrees.

Preferably, the helical angle of the chip discharge groove 20 is set to be variable helix, and 42 degrees and 51 degrees are matched, so that the rigidity of a front-end product is ensured, and the chip discharge performance of the rear end is considered.

Preferably, the first flank angle is 12 degrees, the second flank angle is 30 degrees, and the first flank angle is matched with the helical angle to ensure the thickness of the cutting edge.

The above-mentioned embodiments are preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, and the scope of the present invention includes but is not limited to the above-mentioned embodiments, and all equivalent variations made according to the shape and structure of the present invention are within the protection scope of the present invention.

Claims

1. The utility model provides a PCB is with two cutting edge angle drilling tool which characterized in that: the drill bit comprises a drill handle and a drill edge, wherein a drill tip is arranged at the front end of the drill edge, a first rear cutter face and a second rear cutter face which are connected with each other are arranged in the middle of the drill tip, two chip grooves are formed in the drill edge, the first rear cutter face and the second rear cutter face are both raised curved surfaces, a first cutting edge and a second cutting edge are formed between the outer side of the first rear cutter face and the chip grooves, a first sharp angle and a second sharp angle are respectively formed between the first rear cutter face where the first cutting edge is located and the first rear cutter face where the second cutting edge is located and a drill edge end plane, the first sharp angle is 120-165 degrees, and the second sharp angle is 80-120 degrees;

the two chip grooves are in a symmetrical distribution structure, a confluence parallel structure or a structure with one long chip and one short chip.

2. The dual-corner drilling tool for PCB of claim 1, wherein: the cutter face of the drill point is a double-edge symmetrical cutter face or a single-edge triangular cutter face.

3. The dual-corner drilling tool for PCB of claim 1, wherein: the first relief surface angle is 10-15 degrees, and the second relief surface angle is 25-35 degrees.

4. The dual-corner drilling tool for a PCB of claim 3, wherein: the first flank angle is 12 °, and the second flank angle is 30 °.

5. The dual-corner drilling tool for PCB of claim 3, wherein: the helical angle of the chip groove is a single helical angle or a variable helical angle, the angle of the single helical angle is 24-45 degrees, and the angle of the variable helical angle is 38-51 degrees.

6. The dual-corner drilling tool for PCB of claim 5, wherein: the helix angle of the chip groove is a variable helix angle, and the chip groove adopts a helix angle of 42 degrees and a helix angle of 51 degrees.

7. The dual-angle drilling tool for the PCB according to any one of claims 1 to 6, wherein: the first sharp angle is 130-165 degrees, and the second sharp angle is 80 degrees.