A pcb micro drill
A technology of micro-drilling and drilling body, which is applied in the direction of drill repairing, drilling tool accessories, drilling/drilling equipment, etc. It can solve the problems of difficult tool breaking performance, hole position accuracy and hole wall quality to achieve the ultimate comprehensive index. , to achieve the effect of improving the centering effect, improving the quality of the hole wall, and avoiding the hole position
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Embodiment 1
[0041] In this example, if Figure 1 ~ Figure 3 As shown, it is a double-edged PCB micro drill.
[0042] Such as figure 1 As shown, the PCB micro-drill proposed in this embodiment includes a drill body 1 and a composite drill tip 2, and the composite drill tip 2 is located at the end of the drill body 1. Specifically, the composite drill tip 2 includes a first drill tip 21 and a second drill tip. Two drill points 22, wherein the second drill point 22 is arranged at one end of the drill body 1, the first drill point 21 starts from the top of the second drill point 22, and along the direction parallel to the central axis of the drill body 1 Extend outward.
[0043] Such as figure 2 As shown, the first drill tip 21 includes a chisel edge 211, an inner main cutting edge 212, a first inner corner relief surface 213 and a second inner corner relief surface 214, wherein the chisel edge 211 is aligned with the central axis of the drill body 1 cross, the inner main cutting edge 21...
Embodiment 2
[0060] Such as Figure 4-15 Shown are six situations of single-edged PCB micro-drills.
[0061] refer to Figure 4 , Figure 5 , is a single-edged PCB micro-drill one, the composite drill point 2 of this PCB micro-drill includes a first drill point 21 and a second drill point 22, and the first drill point 21 includes a chisel edge 211, an inner main cutting edge 212, a first The inner top angle relief surface 213 and the second inner top angle relief surface 214, and the first inner top angle relief surface 213' and the second inner top angle relief surface 214' located on the other side of the chisel edge; The drill tip 22 includes a main cutting edge 221 , a first relief surface 222 and a second relief surface 223 . As for the single-edged PCB micro drill 1 , details will not be described here.
[0062] refer to Figure 6 , Figure 7 , is a single-edged PCB micro-drill two, the composite drill point 2 of this PCB micro-drill includes a first drill point 21 and a second ...
Embodiment 3
[0068] Such as Figures 16-17 As shown, it is a three-edged PCB micro-drill. The composite drill tip 2 of the PCB micro-drill includes a first drill tip 21 and a second drill tip 22. The first drill tip 21 includes a chisel edge 211, an inner main cutting edge 212, a second drill tip An inner corner relief surface 213; the second drill tip 22 includes a main cutting edge 221 and a first relief surface 222, for the three-blade PCB micro drill, details will not be described here.
[0069] For the above-mentioned technical scheme, the double-edged PCB micro-drills proposed in Embodiment 1, the six single-edged PCB micro-drills proposed in Embodiment 2, and the three-bladed PCB micro-drills proposed in Embodiment 3 are all made by placing the drill The tip part is divided into two to form a composite drill tip 2 composed of the first drill tip 21 and the second drill tip 22, which satisfies the requirements of reducing the apex angle and the length of the chisel edge, increasing t...
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