CN107639273B - Drill bit structure - Google Patents
Drill bit structure Download PDFInfo
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- CN107639273B CN107639273B CN201611236942.5A CN201611236942A CN107639273B CN 107639273 B CN107639273 B CN 107639273B CN 201611236942 A CN201611236942 A CN 201611236942A CN 107639273 B CN107639273 B CN 107639273B
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Abstract
A kind of drill bit structure, include: a handle segment and an edge section are set to one end of handle segment, an apex point portion is arranged in the front end of edge section, two side of apex point portion, two cutting knife faces to retreading to being formed with, each cutting knife faces include an apex face and secondary knife face, the common extended auxiliary knife face in the part knife spine side of at least secondary knife face of the cutting edge of the apex face of a cutting knife faces and another cutting knife faces extends to the wall surface of a chip removal flute, and has an angle between auxiliary knife face and horizontal plane.This drill bit structure can disperse lower brill resistance by the structure of four knife faces and the inclined design of auxiliary knife face and reduce the abrasion of knife face, and can increase the service life of main shaft.
Description
Technical field
The present invention is related a kind of drill bit structure (drill structure), and is suitable for print in particular to one kind
The drill bit structure of printed circuit board (printed circuit board, PCB).
Background technique
For the high competition environment in response to market for the high-quality of printed circuit board, high demand and fast supply,
The precision of the microbit (micro drill) that industry uses printed circuit board drilling procedure for processing, intensity with into
To rate, even wall quality, wait the requirement of processing conditions also higher and higher.Moreover, industry would generally be to stacked in practice
Made of multi-disc printed circuit board carry out identical drilling processing processing procedure together, with promoted processing efficiency and reduce manufacturing cost,
Therefore the length of the bit used is longer, it is also necessary to have enough intensity and chip removal ability.
Therefore develop a kind of drilling excellent performance and the good drill bit structure of chip removal performance, to be adapted to high speed, efficiently and automatic
The needs for changing drilling, are very necessary.
Summary of the invention
To solve the above-mentioned problems, the object of the invention first is that propose a kind of drill bit structure, by four knife faces structure and
The inclined design of auxiliary knife face can reduce apex point portion thickness, and help to disperse lower brill resistance and reduce the abrasion of knife face, and can
Increase the service life of the main shaft in drill lip portion.
In order to achieve the above object, one embodiment of the invention drill bit structure includes: a handle segment；And one edge section set
It is placed in one end of handle segment, an apex point portion is arranged in the front end of edge section, and apex point portion two sides form one towards handle segment direction is oblique
The one second of first cutting knife faces and one second cutting knife faces, one first outer periphery of the first cutting knife faces and the second cutting knife faces
Outer periphery, which extends respectively along the outer peripheral surface of edge section toward handle segment direction, curls up and is formed one first chip discharge ditch and one the
Two chip discharge ditches, the first cutting knife faces include one first apex face and a first time knife face, the first apex face and first time knife
Face with one first seamed edge in succession, the first apex face have one first cutting edge, first time knife face have one first knife spine side, second
Cutting knife faces include that one second apex face and second of knife face, the second apex face and second of knife face are connect with one second seamed edge
Even, second of knife face has one second knife spine side, wherein the neighbouring brill of the first cutting edge of the first apex face and second of knife face
The common extended one first auxiliary knife face in part the second knife spine side of tip extends to the wall surface of the first chip discharge ditch.
In an embodiment, the first auxiliary knife face is toward the lateral direction inclination far from the apex point portion and is in trench profile, or
The first auxiliary knife face is toward the direction inclination for being biased to a point of a knife dead point and is in trench profile.
In an embodiment, which has one second cutting edge, second cutting edge and the first time knife face
The common extended one second auxiliary knife face in the neighbouring part in the apex point portion the first knife spine side extend to the second chip discharge ditch
Wall surface.
In an embodiment, the second auxiliary knife face is toward the lateral direction inclination far from the apex point portion and is in trench profile, or
The second auxiliary knife face is toward the direction inclination for being biased to a point of a knife dead point and is in trench profile.
In an embodiment, first knife spine while and when second knife spine be in single-arc shaped or double arcs, and first cutting
Side and second cutting edge are linear, and the both ends of first outer periphery are respectively with first cutting edge far from the apex point portion
One end and the one end far from the apex point portion on the first knife spine side connect, the both ends of second outer periphery second are cut with this respectively
One end far from the apex point portion of one end and the second knife spine side far from the apex point portion of chamfered edge connects.
In an embodiment, first cutting edge and second cutting edge are linear, which is in single-arc shaped
Or double arcs, the both ends of first outer periphery one end with first cutting edge far from the apex point portion and first knife spine respectively
Side far from the apex point portion one end connect, the second knife spine side include a straight line and an arc-shaped side, and with the arc-shaped side with
First cutting edge in succession, the both ends of second outer periphery one end with second cutting edge far from the apex point portion and should respectively
The one end far from the apex point portion on the second knife spine side connects, which is shorter than first outer periphery.
In an embodiment, first cutting edge is linear, which is in single-arc shaped or double arcs, this first
The both ends of outer periphery respectively one end with first cutting edge far from the apex point portion and the first knife spine side far from the apex point
The one end in portion connects, which is in triangle, have second of knife face of second seamed edge and this in succession, it is one the tetragonous
Side is connected with the first time knife face and the both ends of one first exterior rim one end with second seamed edge far from the apex point portion respectively
And the 4th seamed edge far from the apex point portion one end connect, second of knife face include the second knife spine side, second periphery
Side, one second exterior rim and with a sequence of second seamed edge of second apex face, and second outer periphery is shorter than first periphery
Side.
In an embodiment, the second apex face also has one second cutting edge, the neighbour of the second cutting edge and first time knife face
The common extended one second auxiliary knife face in part the first knife spine side in nearly apex point portion extends to the wall surface of the second chip discharge ditch.
Wherein, the first auxiliary knife face and the second auxiliary knife face can tilt toward the lateral direction far from apex point portion and be in trench profile,
Or first auxiliary knife face and the second auxiliary knife face can be toward the direction inclination for being biased to point of a knife dead point and be in trench profile.
In an embodiment, the first knife spine while and when the second knife spine be in single-arc shaped or double arcs, and the first cutting edge and
Two cutting edges are linear.
In an embodiment, the first cutting edge and the second cutting edge are linear, and the first knife spine side is in single-arc shaped or double arcs
Shape, the second knife spine side include a straight line and an arc-shaped side, and in succession with arc-shaped side and the first cutting edge.
In an embodiment, the first cutting edge is linear, and the first knife spine side is in single-arc shaped or double arcs, the second apex face
Slightly be in triangle, have the second seamed edge with second of knife face in succession, one the 4th seamed edge is connected and one first with first time knife face
The both ends of exterior rim are connect with one end of the one end in the separate apex point portion of the second seamed edge and the separate apex point portion of the 4th seamed edge respectively,
Second knife face include the second knife spine side, the second outer periphery, the second exterior rim and with a sequence of second seamed edge of the second apex face.
In an embodiment, the first apex face and second of knife face are intersected in apex point portion as a third seamed edge, the second operator
Face and first time knife face are one the 4th seamed edge in the intersection of apex point portion, a point of a knife dead point of edge section be the first seamed edge, the second seamed edge,
The intersection point of third seamed edge and the 4th seamed edge.
In an embodiment, the first apex face and the second apex face are symmetrical arranged centered on point of a knife dead point, first time knife
Face and second of knife face are symmetrical arranged centered on point of a knife dead point.
In an embodiment, the first outer periphery of the first cutting knife faces is curled up along the outer peripheral surface of edge section to form a spiral
Side edge, and first outer periphery of part on the neighbouring first knife spine side of first time knife face forms one side gap ditch along spiral side edge.
Drill bit structure of the invention, drill excellent performance and chip removal performance it is good, adapt in high speed, efficiently with automation drill
Needs, apex point portion thickness can be reduced by the structure of four knife faces and the inclined design of auxiliary knife face, and help to disperse lower brill
Resistance and the abrasion for reducing knife face, and the service life of the main shaft in drill lip portion can be increased.
Detailed description of the invention
Fig. 1 show the structural schematic diagram of one embodiment of the invention drill bit structure.
Fig. 2 show the end face top view of a first embodiment drill bit structure of the invention.
Fig. 3 show the partial side elevation view of first embodiment of the invention drill bit structure.
Fig. 4 show the end face top view of a second embodiment drill bit structure of the invention.
Fig. 5 show the partial side elevation view of second embodiment of the invention drill bit structure.
Fig. 6 show the end face top view of a 3rd embodiment drill bit structure of the invention.
Fig. 7 show the end face top view of a fourth embodiment drill bit structure of the invention.
Fig. 8 show the end face top view of one the 5th embodiment drill bit structure of the invention.
Fig. 9 show the end face top view of a sixth embodiment drill bit structure of the invention.
Main element label declaration:
10 drill bit structures
12 handle segments
14 edge sections
16 apex point portions
18 first cutting knife faces
20,20 ', 20 " second cutting knife faces
22 first outer peripheries
24,24 ' second outer periphery
26 spiral side edges
28 first chip discharge ditches
30 second chip discharge ditches
32 first apex faces
321 first cutting edges
322 first seamed edges
34 first time knife faces
341 first knife spine sides
36,36 " second apex face
361 second cutting edges
362,362 " second seamed edge
363 " first exterior rims
38,38 ', 38 " second of knife face
381,381 ', 381 " second knife spine side
383 " second exterior rims
382 ' straight lines
383 ' arc-shaped sides
40 first auxiliary knife faces
42 second auxiliary knife faces
44 third seamed edges
46,46 " the 4th seamed edge
48 point of a knife dead points
50 trench profiles
52 side gap ditches
1 bit tip angle of θ
2 inclination angle θ
3 angle of θ
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, this hair of Detailed description of the invention is now compareed
Bright specific embodiment:
Fig. 1 show the structural schematic diagram of one embodiment of the invention drill bit structure, and Fig. 2, which show the present invention one first, to be implemented
The end face top view of example drill bit structure, as shown in Figures 1 and 2, a drill bit structure 10 includes a handle segment 12 and an edge section 14,
Edge section 14 is set to 12 one end of handle segment, and the front end of edge section 14 is arranged an apex point portion 16, and 16 two sides of apex point portion are towards handle
12 direction of section is oblique to be formed with one first cutting knife faces 18 and one second cutting knife faces 20, in an embodiment, the first cutting
One bit tip angle θ 1 of knife face 18 and 20 construction of the second cutting knife faces, bit tip angle θ 1 is between 100 degree to 170 degree.First cuts
One first outer periphery 22 in sharpener face 18 and one second outer periphery 24 of the second cutting knife faces 20 are respectively along the outer of edge section 14
Circumferential surface extends to curl up toward 12 direction of handle segment
One first chip discharge ditch 28 and one second chip discharge ditch 30.
First cutting knife faces 18 include one first apex face 32 and a first time knife face 34, and the first apex face 32 has one the
One cutting edge 321, and the first apex face 32 with one first seamed edge 322 with first time knife face 34 in succession, first time knife face 34 has
One first knife spine side 341, and the both ends of the first outer periphery 22 of the first cutting knife faces 18 are remote with the first cutting edge 321 respectively
The one end in the separate apex point portion 16 of one end and the first knife spine side 341 from apex point portion 16 connects；The second cutting knife faces 20 include again
One second apex face 36 and second of knife face 38, the second apex face 36 have one second cutting edge 361, and the second apex face 36
In succession with one second seamed edge 362 and second of knife face 38, second of knife face 38 has one second knife spine side 381, and second cuts
The both ends of second outer periphery 24 of knife face 20 i.e. respectively with the one end in the separate apex point portion 16 of the second cutting edge 361 and the second knife spine
The one end in the separate apex point portion 16 on side 381 connects；Wherein part the second knife spine side in the first cutting edge 321 and neighbouring apex point portion 16
381 common extended one first auxiliary knife faces 40 extend to the wall surface of the first chip discharge ditch 28, accordingly, the second cutting edge 361 and
The common extended one second auxiliary knife face 42 in part the first knife spine side 341 in neighbouring apex point portion 16 extends to the second chip discharge ditch 30
Wall surface.
Above description is connected, in first embodiment, the first cutting edge 321 and the second cutting edge 361 are linear, and first
Knife spine 381 is in single-arc shaped or double arcs at 341 and the second knife spine, and the first apex face 32 and second of knife face 38 are in apex point portion
It is one the 4th seamed edge 46 that 16 intersections be a third seamed edge 44, the second apex face 36 and first time knife face 34 to be intersected in apex point portion 16,
And a point of a knife dead point 48 of edge section 14 is i.e. by the first seamed edge 322,362 third seamed edge 44 of the second seamed edge and 46 intersection of the 4th seamed edge
It forming, and in the first embodiment, the first apex face and 32 second apex faces 36 are symmetrical arranged centered on point of a knife dead point 48, the
Knife face 34 and second of knife face 38 are with point of a knife dead point for 48 center symmetric settings.
The partial side elevation view that Fig. 3 show first embodiment of the invention drill bit structure is please referred to again, as shown in figure institute 3, the
One cutting knife faces and the 18 one the second cutting knife faces 20 are tilted from apex point portion 16 (being shown in Fig. 1) toward two sides, and tiltangleθ 2 is between 5 degree
To between 30 degree；The first auxiliary knife face 40 and the second auxiliary knife face 42 toward the lateral direction inclination far from apex point portion 16 and are in respectively ditch again
Shape profile 50, only discloses the first auxiliary knife face 40 shown in Fig. 3, the second auxiliary knife face 42 is to be symmetrically disposed on centered on point of a knife dead point 48
The other side has angle theta 3 between the first auxiliary knife face 40 and the second auxiliary knife face 42 and a horizontal plane, angle theta 3 is between 90 degree to 180
Between degree, defining this first auxiliary knife face 40 and the second auxiliary knife face 42 has a reverse caster angle.
Fig. 4 show the end face top view of a second embodiment drill bit structure of the invention, is identical with the first embodiment ground,
First apex face 32 and the second apex face 36 are symmetrical arranged centered on point of a knife dead point 48, first time knife face 34 and second of knife face
38 are symmetrical arranged centered on point of a knife dead point 48, and the first cutting edge 321 and the second cutting edge 361 are linear, the first knife spine
At 341 and the second knife spine, 381 be in single-arc shaped or double arcs；And it is different from the first embodiment ground, in a second embodiment, such as scheme
Shown in 4 and Fig. 5, the first auxiliary knife face 40 and the second auxiliary knife face 42 toward the interior direction inclination for being biased to point of a knife dead point 48 and are in respectively ditch
Shape profile 50, only discloses the first auxiliary knife face 40 shown in Fig. 5, the second auxiliary knife face 42 is to be symmetrically disposed on centered on point of a knife dead point 48
The other side has angle theta 3 between the first auxiliary knife face 40 and the second auxiliary knife face 42 and a horizontal plane, angle theta 3 is between 0 degree to 90 degree
Between, defining this first auxiliary knife face 40 and the second auxiliary knife face 42 has a positive bevel angle.
Fig. 6 show the end face top view of a 3rd embodiment drill bit structure of the invention, as shown in fig. 6, the first bite
Face 18 and the second cutting knife faces 20 ' have different shape, and the first cutting knife faces 18 include one first apex face 32 and one first
Secondary knife face 34, the second cutting knife faces 20 ' include one second apex face 36 and second of knife face 38 ', wherein the first apex face 32
The first cutting edge 321 and the second cutting edge 361 of the second apex face 36 be of a straight line type, and the first knife spine of first time knife face 34
Side 341 be in single-arc shaped or double arcs, the both ends of the first outer periphery 22 respectively with the separate apex point portion 16 of the first cutting edge 321 one
One end connection in the separate apex point portion 16 on end and the first knife spine side 341, the second knife spine side 381 ' of second of knife face 38 ' includes one
Straight line 382 ' and an arc-shaped side 383 ', and connect with arc-shaped side 383 ' with the first cutting edge 321, the two of the second outer periphery 24 '
Hold one end with the one end in the separate apex point portion 16 of the second cutting edge 361 and the separate apex point portion 16 on the second knife spine side 381 ' respectively
Connection, in this embodiment, since the first knife spine is when 341 are different from the second knife spine 381 ', so that the second outer periphery 24 ' is shorter than
First outer periphery 22, and the area of the second cutting knife faces 20 ' is slightly less than the area of the first cutting knife faces 18.First cutting edge again
321 and second the common extended one first auxiliary knife face 40 of arc-shaped side 383 ' on knife spine side 381 ' extend to the first chip discharge ditch 28
Wall surface, accordingly, the common extended one second auxiliary knife in part the first knife spine side 341 in the second cutting edge 361 and neighbouring apex point portion 16
Face 42 extends to the wall surface of the second chip discharge ditch 30.In 3rd embodiment, the first auxiliary knife face 40 and the second auxiliary knife face 42 divide
Not toward the lateral direction inclination far from apex point portion 16 and be in trench profile 50 (being shown in Fig. 3), that is, the first auxiliary knife face 40 and second
Auxiliary knife face 42 has reverse caster angle as shown in Figure 3.
Fig. 7 show the end face top view of a fourth embodiment drill bit structure of the invention, identically as 3rd embodiment,
Slightly in single-arc shaped or double arcs the first knife spine while 341 and slightly be of a straight line type the second knife spine while 381 ' so that the second outer periphery
24 ' are shorter than the first outer periphery 22, and the area of the second cutting knife faces 20 ' is slightly less than the area of the first cutting knife faces 18；And with
Differently, in the fourth embodiment, the first auxiliary knife face 40 and the second auxiliary knife face 42 are respectively toward deviation point of a knife dead point 48 for three embodiments
Interior direction inclination and be in trench profile 50 (being shown in Fig. 5), that is, the first auxiliary knife face 40 and the second auxiliary knife face 42 have such as Fig. 5
Shown in positive bevel angle.
In above-mentioned first, second, third and fourth embodiment, the first apex face 32 and the second apex face 36 are symmetrical with knife
Sharp dead point 48, and it is respectively provided with the first/second cutting edge of a straight line, and the auxiliary knife face of first/second is by first/second cutting edge
And its adjacent part the second/the first knife spine side is common extended and is formed, in above-described embodiment, auxiliary knife face is two, only not
It is limited to this, auxiliary knife face also can be only by a wherein cutting edge and its adjacent knife spine side is extended forms.
Fig. 8 show the end face top view of one the 5th embodiment drill bit structure of the invention, as shown in figure 8,16 liang of apex point portion
Side is formed with one first cutting knife faces 18 and one second cutting knife faces 20 ", the first cutting knife faces 18 packet towards handle segment direction is oblique
Containing one first apex face 32 and a first time knife face 34, wherein the first cutting edge 321 is linear, the first knife spine side 341 is in single
Arc or double arcs, the both ends of the first outer periphery 22 one end and first with the separate apex point portion 16 of the first cutting edge 321 respectively
The one end in the separate apex point portion 16 on knife spine side 341 connects.
Please continue to refer to shown in Fig. 8, the second cutting knife faces 20 " include one second apex face 36 " and second of knife face
38 ", the second apex face 36 " does not have the design of cutting edge and is slightly in triangle, and the second apex face 36 " has the second seamed edge
362 ", the 4th seamed edge and the first exterior rim, the second seamed edge with 362 " with second of knife face 38 " in succession, the 4th seamed edge 46 " and
One time knife face 34 is connected, one end of the separate point of a knife dead point 48 of the second seamed edge 362 " and the separate point of a knife dead point of the 4th seamed edge 46 "
48 one end is connected with one first exterior rim 363 "；Second of knife face 38 " and the second apex face 36 " are in succession in the second seamed edge
362 ", second of knife face 38 " also has the second knife spine side 381 ", the second exterior rim 383 " and the second outer periphery 24, the second knife spine
Side 381 " is in single-arc shaped or double arcs, the second exterior rim 383 ", the first exterior rim 363 " of the second apex face 36 " and the second seamed edge
The both ends of 362 " intersections, the second outer periphery 24 " are connect with one end of the second exterior rim 383 " and the second knife spine side 381 " respectively,
Second outer periphery 24 " is shorter than the first outer periphery 22.
Above description is connected, in this 5th embodiment, as shown in figure 8, the second apex face 36 " does not have setting for cutting edge
Meter, and the area of the second apex face 36 " is much smaller than the area of the first apex face 32, and the first auxiliary knife face 40 is by the first cutting edge
321 and part the second knife spine side 381 " in neighbouring apex point portion 16 extend to the wall surface of the first chip discharge ditch 28, and the first auxiliary knife
Face 40 is toward the lateral direction inclination far from apex point portion 16 and is in trench profile 50 (being shown in Fig. 3), that is, the first auxiliary knife face has such as
Reverse caster angle shown in Fig. 3.
Fig. 9 show the end face top view of a sixth embodiment drill bit structure of the invention, identically as the 5th embodiment,
Second apex face 36 " of the second cutting knife faces 20 " does not have cutting edge and is slightly in triangle, and the first auxiliary knife face 40 is cut by first
Part the second knife spine side 381 " in chamfered edge 321 and neighbouring apex point portion 16 extends to 28 wall surfaces of the first chip discharge ditch, and with the
Differently, in the sixth embodiment, the first auxiliary knife face 40 is toward the interior direction inclination for being biased to point of a knife dead point 48 and is in for five embodiments
Trench profile (is shown in Fig. 5), that is, the first auxiliary knife face 40 has positive bevel angle as shown in Figure 5.
Above-mentioned first into sixth embodiment, the knife face structure that all there is four sides type to design for edge section front end, and have
At least one auxiliary knife face extends to chip discharge ditch by cutting edge and local knife spine side；Again no matter auxiliary knife face be with positive bevel angle or
Reverse caster angle, the width W of auxiliary knife face account for the 20% to 80% of the outer diameter of edge section, preferably to account for the 60% of outer diameter.It please join again
It reads shown in Fig. 1 to Fig. 5, the part exterior rim of first time knife face 34 and second of knife face 38 forms one respectively along spiral side edge 25
Side gap ditch 52, when gap ditch 52 is respectively adjacent to the first knife spine 341 and the second knife spine side 381, side gap ditch 52 be shorter than the first chip row
Ditch 28 and the second chip discharge ditch 30 out.
Further, edge section 14 can sequentially be divided into a leading portion, a middle section and one from apex point portion 16 toward 12 direction of handle segment
Back segment, as shown in Figure 1, the first chip discharge ditch 28 and the second chip discharge ditch 30 are separated in leading portion in symmetrical, gradually in middle section
It is close, and be overlapped in hindfoot portion；Again in an embodiment, the length of the first chip discharge ditch 28 can also be different from the second chip
The length of discharge gutter 30 when so that two ditches overlapping onto a position, wherein a ditch does not continue to extend, and only retains a ditch and extends to sword
14 end of section.
Wherein, the material of handle segment 12 is stainless steel material, and the material of edge section 14 is tungsten carbide material, in an embodiment
In, handle segment 12 and edge section 14 are bonded together using welding or adhesive agent；It, can be in handle segment 12 again in another embodiment
An end face one inner hole (not shown) is set, and one end of edge section 14 has one to plug end (not shown), inner hole it is interior
Diameter, which is less than or equal to, plugs the outer diameter at end, will plug end and squeezes into and is embedded in inner hole, uses in conjunction with handle segment 12 and edge section 14.
Or the handle segment 12 and edge section 14 of drill bit structure 10 also can be integrally formed with the Tungsten Bar that is carbonized.
In the present invention, apex point portion thickness can be reduced by the inclined design of auxiliary knife face, so that utilizing this drill bit structure
Being drilled, it is smaller to bore resistance at present；The design of four knife faces of knife face structure helps to disperse lower brill resistance and reduces knife face again
Abrasion, and the service life of main shaft can be increased.
The foregoing is merely the schematical specific embodiment of the present invention, the range being not intended to limit the invention.It is any
Those skilled in the art, made equivalent changes and modifications under the premise of not departing from design and the principle of the present invention,
It should belong to the scope of protection of the invention.
Claims (10)
1. a kind of drill bit structure, which is characterized in that the drill bit structure includes:
One handle segment；And
One edge section, is set to one end of the handle segment, and the front end of the edge section is arranged an apex point portion, the apex point portion two sides towards this
Handle segment direction one first cutting knife faces of oblique formation and one second cutting knife faces, one first outer periphery of first cutting knife faces
And one second outer periphery of second cutting knife faces is curled up respectively along the outer peripheral surface of the edge section toward handle segment direction extension
And one first chip discharge ditch and one second chip discharge ditch are formed, which includes one first apex face and one the
In succession with one first seamed edge, which has one first to cut for knife face, first apex face and the first time knife face
Chamfered edge, the first time knife face have one first knife spine side, which includes one second apex face and second of knife
In succession with one second seamed edge, which has one second knife spine side for face, second apex face and second of knife face,
In, first cutting edge of first apex face and the neighbouring part in the apex point portion the second knife spine side of second of knife face are total
The wall surface of the first chip discharge ditch is extended to extended one first auxiliary knife face.
2. drill bit structure as described in claim 1, which is characterized in that outside of the first auxiliary knife face toward the separate apex point portion
It toward the direction inclination for being biased to a point of a knife dead point and is in trench profile to inclination and in trench profile or the first auxiliary knife face.
3. drill bit structure as described in claim 1, which is characterized in that second apex face has one second cutting edge, this
The common extended one second auxiliary knife face in the neighbouring part in the apex point portion the first knife spine side of two cutting edges and the first time knife face prolongs
Extend to the wall surface of the second chip discharge ditch.
4. drill bit structure as claimed in claim 3, which is characterized in that outside of the second auxiliary knife face toward the separate apex point portion
It toward the direction inclination for being biased to a point of a knife dead point and is in trench profile to inclination and in trench profile or the second auxiliary knife face.
5. drill bit structure as claimed in claim 3, which is characterized in that first knife spine while and when second knife spine be in single-arc shaped
Or double arcs, and first cutting edge and second cutting edge are linear, but the both ends of first outer periphery respectively with this
One end far from the apex point portion of one end and the first knife spine side far from the apex point portion of one cutting edge connects, second periphery
While both ends respectively one end with second cutting edge far from the apex point portion and when second knife spine far from the apex point portion
One end connection.
6. drill bit structure as claimed in claim 3, which is characterized in that first cutting edge and second cutting edge are linear
Shape, the first knife spine side are in single-arc shaped or double arcs, and the both ends of first outer periphery respectively should with the separate of first cutting edge
The one end far from the apex point portion on the one end in apex point portion and the first knife spine side connects, the second knife spine side include a straight line and
One arc-shaped side, and in succession with the arc-shaped side and first cutting edge, the both ends of second outer periphery respectively with second cutting edge
Far from the apex point portion one end and the second knife spine side far from the apex point portion one end connect, second outer periphery shorter than should
First outer periphery.
7. drill bit structure as described in claim 1, which is characterized in that first apex face and second of knife face are in the apex point
It is one the 4th seamed edge, the sword that portion's intersection be a third seamed edge, second apex face and the first time knife face to be intersected in the apex point portion
One point of a knife dead point of section is the intersection point of first seamed edge, second seamed edge, the third seamed edge and the 4th seamed edge.
8. drill bit structure as claimed in claim 7, which is characterized in that first apex face and second apex face are with the point of a knife
It is symmetrical arranged centered on dead point, the first time knife face and second of knife face are symmetrical arranged centered on the point of a knife dead point.
9. drill bit structure as described in claim 1, which is characterized in that first cutting edge is linear, the first knife spine side
In single-arc shaped or double arcs, the both ends of first outer periphery one end with first cutting edge far from the apex point portion and should respectively
The one end in the separate apex point portion on the first knife spine side connects, which is in triangle, has second seamed edge and is somebody's turn to do
Second of knife face in succession, one the 4th seamed edge be connected with the first time knife face and the both ends of one first exterior rim respectively with this second
One end far from the apex point portion of one end and the 4th seamed edge far from the apex point portion of seamed edge connects, which includes
The second knife spine side, second outer periphery, one second exterior rim and with a sequence of second seamed edge of second apex face, and this
Two outer peripheries are shorter than first outer periphery.
10. drill bit structure as described in claim 1, which is characterized in that first outer periphery edge of first cutting knife faces should
The outer peripheral surface of edge section is curled up to form a spiral side edge, and the part on the neighbouring first knife spine side of the first time knife face should
First outer periphery forms one side gap ditch along the spiral side edge.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620780033 | 2016-07-22 | ||
| CN2016207800337 | 2016-07-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107639273A CN107639273A (en) | 2018-01-30 |
| CN107639273B true CN107639273B (en) | 2019-05-14 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611236942.5A Active CN107639273B (en) | 2016-07-22 | 2016-12-28 | Drill bit structure |
| CN201621454168.0U Withdrawn - After Issue CN206343678U (en) | 2016-07-22 | 2016-12-28 | Drill bit structure |
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| CN201621454168.0U Withdrawn - After Issue CN206343678U (en) | 2016-07-22 | 2016-12-28 | Drill bit structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107639273B (en) * | 2016-07-22 | 2019-05-14 | 创国兴业有限公司 | Drill bit structure |
| CN109746489A (en) * | 2017-11-03 | 2019-05-14 | 创国兴业有限公司 | Drill bit structure |
| TWI657882B (en) * | 2018-02-02 | 2019-05-01 | 香港商創國興業有限公司 | Drill structure |
| CN110125461A (en) * | 2018-02-02 | 2019-08-16 | 创国兴业有限公司 | Drill bit structure |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1233347A (en) * | 1983-07-21 | 1988-03-01 | John A. Bunting | Printed circuit board drill and method of manufacture |
| CN2512197Y (en) * | 2001-10-11 | 2002-09-18 | 林芳贤 | Small drill for soldering circuit board |
| US20030082020A1 (en) * | 2001-11-01 | 2003-05-01 | Fan-Hsien Lin | Welded micro-drill |
| JP3801606B2 (en) * | 2004-12-01 | 2006-07-26 | ユニオンツール株式会社 | Drill |
| CN2863328Y (en) * | 2006-01-24 | 2007-01-31 | 颜灿然 | Modified tangent plane structure for three-edge minisize needle |
| CN201079854Y (en) * | 2007-09-28 | 2008-07-02 | 上海惠而顺精密工具有限公司 | Integral hard alloy printing circuit board drill |
| CN201586776U (en) * | 2009-11-23 | 2010-09-22 | 虹智精密股份有限公司 | Processing cutting tool structure of printed circuit board |
| CN204504306U (en) * | 2015-03-13 | 2015-07-29 | 华伟纳精密工具（昆山）有限公司 | Ultra-small diameter PCB slotted eye processing and forming drill point |
| CN204934687U (en) * | 2015-09-08 | 2016-01-06 | 创国兴业有限公司 | Drill bit structure |
| CN107639273B (en) * | 2016-07-22 | 2019-05-14 | 创国兴业有限公司 | Drill bit structure |
-
2016
- 2016-12-28 CN CN201611236942.5A patent/CN107639273B/en active Active
- 2016-12-28 CN CN201621454168.0U patent/CN206343678U/en not_active Withdrawn - After Issue
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| CN206343678U (en) | 2017-07-21 |
| CN107639273A (en) | 2018-01-30 |
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