CN215919176U

CN215919176U - Novel single-edge double-groove micro drill bit

Info

Publication number: CN215919176U
Application number: CN202122422534.1U
Authority: CN
Inventors: 王崇; 王馨; 王俊锋
Original assignee: Nanyang Dingtai High Tech Co ltd
Current assignee: Nanyang Dingtai High Tech Co ltd
Priority date: 2021-10-09
Filing date: 2021-10-09
Publication date: 2022-03-01
Anticipated expiration: 2031-10-09

Abstract

The utility model relates to a novel single-edge double-groove micro drill bit which comprises a needle handle and a needle blade, wherein a drill bit is arranged at the end part of the needle blade, a main cutting edge and an auxiliary cutting edge are arranged on the drill bit, a main chip removal groove and an auxiliary chip removal groove are arranged on the drill bit, the main chip removal groove and the auxiliary chip removal groove are both spiral, the center of a drill tip of the drill bit is triangular, the auxiliary chip removal groove and the main chip removal groove converge at a position 0.60mm to 1.50mm away from the center of the drill tip, and the auxiliary chip removal groove and the main chip removal groove run to the tail of the main chip removal groove or the position 1.00mm before the tail of the main chip removal groove. This application has the single-edged drill bit of main cutting edge, vice cutting edge and sets up corresponding main chip groove, vice chip groove through the setting for this single-edged double flute microbit's drill point intensity is far greater than the intensity of double-edged double flute drill point, and chip removal ability is far greater than single-edged single flute drill point simultaneously, avoids appearing consent, chip removal failure, broken needle when the many folded sheets of high rotational speed drilling processing, high thick plate.

Description

Novel single-edge double-groove micro drill bit

Technical Field

The utility model relates to a PCB micro-drilling processing technology, in particular to a novel single-edge double-groove micro-drill.

Background

Along with the development of high integration and precision words of electronic products, a Printed Circuit Board (PCB) gradually develops towards the directions of small aperture, narrow line spacing, high density and multiple layers, along with the increasing thickness of the printed circuit board and the decreasing diameter of a copper-coated hole, the length-diameter ratio of a PCB micro-drill bit is continuously increased, the inner length-diameter ratio of the PCB micro-drill industry is more than 22 times, namely, the PCB micro-drill bit is regarded as a length-diameter ratio drill point, the existing PCB micro-drill bit adopts single-groove chip removal, and along with the increasing thickness of a board and the increasing length-diameter ratio of the drill point, the problems of hole plugging, dust blocking, needle breakage and the like easily occur in the single-groove chip removal.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a novel single-blade double-groove micro drill bit, which is used for solving the problems that the existing PCB micro drill bit is easy to plug holes and block dust when a single groove discharges chips.

In order to solve the problems, the utility model provides a novel single-edge double-groove micro drill bit which comprises a needle handle and a needle blade, wherein a drill bit is arranged at the end part of the needle blade, a main cutting blade and an auxiliary cutting blade are arranged on the drill bit, a main chip discharge groove corresponding to the main cutting blade and an auxiliary chip discharge groove corresponding to the auxiliary cutting blade are arranged on the drill bit, the main chip discharge groove and the auxiliary chip discharge groove are both in a spiral shape and have the same angle, the center of a drill point of the drill bit is in a triangular shape, the auxiliary chip discharge groove is converged with the main chip discharge groove at a position 0.60mm to 1.50mm away from the center of the drill point, and the auxiliary chip discharge groove and the main chip discharge groove are parallel to the tail of the main chip discharge groove or a position 1.00mm before the tail of the main chip discharge groove.

The novel single-edge double-groove micro drill provided by the utility model also has the following technical characteristics:

furthermore, the auxiliary chip grooves are converged into the main chip grooves at a spiral angle, the convergence angle is 60-75 degrees, and the length of the convergence angle is 0.15-0.50 mm.

Further, the spiral angle of the main chip grooves is 40-52 degrees.

The utility model has the following beneficial effects: according to the single-blade double-groove micro drill bit, the single-blade drill bit with the main cutting edge and the auxiliary cutting edge is arranged, and the corresponding main chip removal groove and the auxiliary chip removal groove are arranged, so that the strength of the drill bit of the single-blade double-groove micro drill bit is far greater than that of a double-blade double-groove drill bit, and meanwhile, the chip removal capacity is far greater than that of the single-blade single-groove drill bit, and hole plugging, poor chip removal and needle breakage are avoided when multiple stacked plates and high and thick plates are drilled and processed at a high rotating speed; the single-blade structure is adopted, and the center of the drill point is triangular, so that the positioning is accurate and the hole position precision is high in the drilling process.

Drawings

FIG. 1 is a schematic structural diagram of a novel single-edge double-flute microbit according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

fig. 3 is a view of the novel single-edge double-flute micro drill of fig. 1 in the direction of the drill tip.

Detailed Description

The utility model will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the embodiment of the novel single-edge double-flute microbit shown in fig. 1 to 3, the novel single-edge double-flute microbit comprises a needle handle 10 and a needle blade 20, wherein a drill is arranged at the end of the needle blade 20, a main cutting blade 21 and an auxiliary cutting blade 23 are arranged on the drill, a main chip flute 22 corresponding to the main cutting blade 21 and an auxiliary chip flute 24 corresponding to the auxiliary cutting blade 23 are arranged on the drill, the main chip flute 22 and the auxiliary chip flute 24 are both helical and have the same angle, the center of a drill tip 201 of the drill is triangular, the auxiliary chip flute 24 is converged with the main chip flute 22 at a position 0.60mm to 1.50mm from the center of the drill tip 201, and the auxiliary chip flute 24 and the main chip flute 22 run parallel to the tail of the main chip flute 22 or the position 1.00mm before the tail of the main chip flute 22. According to the single-blade double-groove micro drill bit, the single-blade drill bit with the main cutting edge and the auxiliary cutting edge is arranged, and the corresponding main chip removal groove and the auxiliary chip removal groove are arranged, so that the strength of the drill bit of the single-blade double-groove micro drill bit is far greater than that of a double-blade double-groove drill bit, and meanwhile, the chip removal capacity is far greater than that of the single-blade single-groove drill bit, and hole plugging, poor chip removal and needle breakage are avoided when multiple stacked plates and high and thick plates are drilled and processed at a high rotating speed; the hole drilling machine has the advantages that the single-edge structure is adopted, the center of the drill point is triangular, the positioning is accurate in the drilling process, the hole position precision is high, and the CPK value of the hole position after drilling cannot be influenced due to the increase of the hole limit.

In an embodiment of the present application, preferably, the secondary chip groove 24 merges into the primary chip groove 22 at a spiral angle, the merging angle α is 60 ° to 75 °, the merging angle length L is 0.15mm to 0.50mm, and the combination of the merging angle and the merging angle length can effectively improve the chip discharging space at the rear end of the drill body, effectively improve the chip discharging capability of the drill bit, and ensure the rigidity of the drill bit.

In one embodiment of the present application, the angle (helical angle) of the main chip-discharging groove 22 is preferably 40 ° to 52 °, which effectively extends the axial core of the drill bit to the tail end of the drill bit (drill blade) in a cylindrical shape, so that the drill bit has a good chip-discharging capability.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a novel single-edge double flute microbit, includes needle handle, needle sword, the tip of needle sword is equipped with the drill bit, be equipped with main cutting edge, vice cutting edge on the drill bit, its characterized in that, be equipped with on the drill bit with the main chip groove that main cutting edge corresponds and with the vice chip groove that vice cutting edge corresponds, main chip groove vice chip groove all is the heliciform, the drill point center of drill bit is triangle-shaped, vice chip groove 0.60mm to 1.50mm department with main chip groove converges apart from drill point center, vice chip groove with main chip groove is parallel extremely main chip groove is closed the tail or 1.00mm department before the main chip groove is closed the tail.

2. The novel single-edge double-flute microbit as claimed in claim 1, characterized in that: the auxiliary chip grooves are converged into the main chip grooves at a spiral angle, the convergence angle is 60-75 degrees, and the length of the convergence angle is 0.15-0.50 mm.

3. The novel single-edge double-flute microbit as claimed in claim 1, characterized in that: the spiral angle of the main chip groove is 40-52 degrees.