CN103998167B - Drill bit and use the manufacture method of machining thing of this drill bit - Google Patents
Drill bit and use the manufacture method of machining thing of this drill bit Download PDFInfo
- Publication number
- CN103998167B CN103998167B CN201280063710.8A CN201280063710A CN103998167B CN 103998167 B CN103998167 B CN 103998167B CN 201280063710 A CN201280063710 A CN 201280063710A CN 103998167 B CN103998167 B CN 103998167B
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- groove
- drill bit
- rear end
- cutting portion
- ramp
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
- B23B41/14—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor for very small holes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/02—Twist drills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/40—Flutes, i.e. chip conveying grooves
- B23B2251/406—Flutes, i.e. chip conveying grooves of special form not otherwise provided for
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
Abstract
Drill bit involved by embodiments of the present invention possesses columned cutting portion, and this cutting portion has: be positioned at the first blade and second blade of leading section separated from each other；Respectively with the first blade and the second blade continuously and towards the first groove of rearward end spiral extension and the second groove, cutting portion has isolated area, locally on-ramp and terminal area, at isolated area, first groove and the second groove are arranged separated from each other, and along with close to each other towards rearward end under side-looking line of vision；Locally the rear end portion side of on-ramp and isolated area is continuous, in on-ramp, local, a part for the first groove collaborate with a part for the second groove and the first groove and the second groove parallel；Terminal area is continuous with the rear end portion side of on-ramp, local, and only exists the side in the rear end of the first groove and the rear end of the second groove in terminal area.The present invention also provides for a kind of using this drill bit to the method manufacturing machining thing.
Description
Technical field
The present invention relates to a kind of drill bit and use the manufacture method of machining thing of this drill bit.
Background technology
Technical scheme as described below is had: in main body disclosed in Japanese Unexamined Patent Publication 2007-307642 publication
Front end possess in the drill bits of two blades and be connected with each blade two torsion grooves, two are reversed grooves
Collaborate in the position having retreated ormal weight from the front end of main body and become a groove.
But, as the above-mentioned drill bit making groove collaborate has the chip generated from each blade easily to collaborate at two grooves
Position blocking tendency.It is additionally, since because the chip of blocking causes collaborating position heating, thus
May make to be cut the inner wall deformation (surface roughness deterioration) that material is rotten, process hole.It addition,
When chip is jammed in the position, interflow of groove, the course of processing puts on the stress (cutting of this position
Moment of torsion) increase, drill bit may be caused to lose.In addition, in the position, interflow of groove, due to groove
Mutually influence and make groove shape change, therefore changed by the chip flow of each groove, can energy loss
The inwall in evil processing hole.
Therefore, a kind of hole machined having excellence concurrently and the drill bit of the excellent resistance to property lost and use are sought
The manufacture method of the machining thing of this drill bit.
Summary of the invention
One of problem of the present invention is, it is provided that a kind of hole machined having excellence concurrently and excellent folding
The drill bit of damage property and use the manufacture method of machining thing of this drill bit.
Drill bit involved by embodiments of the present invention possesses columned cutting portion, and this cutting portion has
Have: be positioned at the first blade and second blade of leading section separated from each other；Respectively with described first blade
And described second blade is continuously and towards the first groove of rearward end spiral extension and the second groove, described in cut
The portion of cutting has isolated area, locally on-ramp and terminal area, at described isolated area, and described
One groove is arranged separated from each other with described second groove, and along with towards described rear end under side-looking line of vision
Portion and close to each other；On-ramp, described local is continuous with the described rear end portion side of described isolated area,
In on-ramp, described local, the part interflow of a part for described first groove and described second groove and
Described first groove is parallel with described second groove；Described terminal area is described with on-ramp, described local
Rear end portion side is continuous, and only exists the rear end and described the of described first groove in described terminal area
A side in the rear end of two grooves.
The manufacture method of the machining thing involved by embodiments of the present invention includes: make above-mentioned reality
Execute the operation that the drill bit involved by mode rotates around rotary shaft；Make described the of the described drill bit being rotating
One blade and described second blade and the operation being cut material；Material and institute it is cut described in making
State the operation that drill bit separates.
Drill bit involved according to the embodiment of the present invention, has: a part for the first groove and second
The part interflow of groove and the first groove and the parallel on-ramp, local of the second groove；With on-ramp, local
Rear end portion side continuously and only exist end of a side in the rear end of the first groove and the rear end of the second groove
End regions.So, in on-ramp, local, two grooves have the part at interflow and keep each flute profile
The part of shape, is collaborated by local therefore, it is possible to the chip of flowing in each groove utilized and broadens
Groove width cooperation ground end side backward is discharged.It addition, the cutting portion easily concentrated in bending stress
In rear end portion side i.e. terminal area, owing to the groove of only one side extends, therefore, it is possible to by thick for the core of drill bit true
Protect relatively big and suppress flexure, bending.As a result of which it is, hole machined and the excellence of excellence can be had concurrently
The resistance to property lost.
Accompanying drawing explanation
Fig. 1 is the figure of the drill bit involved by the first embodiment representing the present invention, and (a) is unitary side
View, (b) is the front end figure that end side is observed in the past.
Fig. 2 is the partial enlarged drawing of the drill bit shown in Fig. 1, and (a) is to represent the leading section in cutting portion
The side view of side, (b) is the side view in the most whole region representing cutting portion.
Fig. 3 is the figure representing the drill bit shown in Fig. 1, is to represent to cut off along each line of Fig. 2 (b)
The sectional view of the state after cutting portion, (a) is line A-A sectional view, and (b) is line B-B sectional view.
Fig. 4 is the figure representing the drill bit shown in Fig. 1, is to represent to cut off along each line of Fig. 2 (b)
The sectional view of the state of cutting portion, (a) is line C-C sectional view, and (b) is line D-D sectional view, (c)
It it is E-E line sectional view.
Fig. 5 is represent cutting portion in the drill bit involved by second embodiment of the present invention the most whole
The side view in individual region, is comparable to the figure of Fig. 2 (b).
Fig. 6 is represent cutting portion in the drill bit involved by third embodiment of the present invention the most whole
The side view in individual region, is comparable to the figure of Fig. 2 (b).
Fig. 7 is the line B-B sectional view of the drill bit shown in Fig. 6.
Fig. 8 is the most whole of the cutting portion in the drill bit involved by the 4th embodiment representing the present invention
The side view in individual region, is comparable to the figure of Fig. 2 (b).
Fig. 9 (a)～(c) are the manufactures representing the machining thing involved by embodiments of the present invention
The synoptic diagram of method.
Figure 10 is that the summary of the variation representing the drill bit groove portion involved by embodiments of the present invention is said
Bright figure.
Detailed description of the invention
<drill bit>
(the first embodiment)
Hereinafter, with reference to Fig. 1～Fig. 4, the first embodiment involved by the drill bit of the present invention is carried out in detail
Describe in detail bright.
As shown in Fig. 1 (a), the drill bit 1 of present embodiment substantially possesses by the rotation of work mechanism
Main shaft etc. hold main part (base end part) 20, main part 20 end side arrange cutting portion
10.Main part 20 is the shape of the rotary shaft according to work mechanism and the position designed.Cutting portion 10
The position being and be cut material.It should be noted that the arrow a in Fig. 1 (a) represents brill
The direction of rotation of 1.
Cutting portion 10 is the position in the machining be cut material with Main Function.Specifically
If explanation, as shown in Fig. 1 (b) and Fig. 2 (a), the cutting portion 10 of present embodiment is in front end
Portion 10a has two blades 11 (the first blade 11a and the second blade 11b) being separated from each other setting.
That is, the drill bit 1 of present embodiment is two-point bit.
It addition, the cutting portion 10 of present embodiment and two blades 11 are accordingly outside cutting portion 10
There is in week 10c two grooves 12 (the first groove 12a and the arranging rearward end 10b from leading section 10a
Two groove 12b).It should be noted that the periphery 10c of cutting portion 10 be at Fig. 1 (b), Fig. 3 and
The position being illustrated by the broken lines in Fig. 4.
It addition, in the present embodiment, the shape of cutting portion 10 is cylindrical.That is, in this enforcement
In the section vertical with its central shaft O of the cutting portion 10 of mode, current end 10a's is a diameter of
During a diameter of T2 at the position beyond T1, leading section 10a, T1 and T2 has the pass of T1=T2
System.It addition, in the section vertical with central shaft O of the cutting portion 10 of present embodiment, it is straight
Footpath is constant from leading section 10a to rearward end 10b.Before the central shaft O of cutting portion 10 is through
End 10a and the axle of rearward end 10b, refer at the shape observing cutting portion 10 from 10a side, leading section
Under state, become the axle of rotary shaft when making cutting portion 10 rotate.It should be noted that in this enforcement
In mode, the central shaft O of cutting portion 10 is positioned at the position identical with the rotary shaft of drill bit 1 described later.
So, the rotary shaft of drill bit 1 described later uses identical for the central shaft O accompanying drawing mark with cutting portion 10
Remember and illustrate.
Two blades 11 that cutting portion 10 has, as shown in Fig. 1 (b) and Fig. 2 (a), are formed at and cut
Cut the leading section 10a in portion 10.In the present embodiment, the first blade 11a and the second blade 11b with
180 ° rotationally symmetrical it is configured on the basis of the central shaft O (axis) of cutting portion 10.That is,
One blade 11a and the second blade 11b is toward each other in central shaft O Double Symmetry.In other words, when from
When cutting portion 10 is observed in 10a side, leading section, the first blade 11a and the second blade 11b is with cutting portion
On the basis of the central shaft O of 10 point-symmetrically.By the first blade 11a arranged as described above and
Second blade 11b, it is possible to increase to the straight stability being cut when material is processed.
It addition, in the present embodiment, as shown in Fig. 1 (b) and Fig. 2 (a), at cutting portion 10
10a side, the most forward end be provided with chisel edge 11c (11c1,11c2).Chisel edge 11c and the first blade
11a and the second blade 11b has the effect of slicing material in the lump.
The main purpose of two grooves 12 is the chip discharge that will be generated by two blades 11.Specifically
Saying, as shown in Fig. 1 (b) and Fig. 2 (a), the first groove 12a and the second groove 12b is respectively with first
Blade 11a and the second blade 11b is continuous, and from the leading section 10a end 10b backward of cutting portion 10
(main part 20 side) extends in the shape of a spiral.In the present embodiment, the groove width of the first groove 12a with
The groove width of the second groove 12b is identical.It addition, in the present embodiment, the degree of depth of the first groove 12a and
It is constant other than around that the degree of depth of two groove 12b at least removes terminal area Z described later.In machining
Time, the first blade 11a the chip formed basically by with first blade 11a continuous print the first groove
12a and backward end 10b side discharge, the second blade 11b the chip formed is basically by with the
Two blade 11b continuous print the second groove 12b and backward end 10b side discharge.
It addition, as shown in Fig. 1 (b), formed by with the first blade 11a continuous print chisel edge 11c1
Chip and by the chip formed with the second blade 11b continuous print chisel edge 11c2 via with each chisel edge 11c
After two be correspondingly arranged in knife face 14 (knife face 14b after major first flank 14a and second) second
Rear knife face 14b and discharged by the first groove 12a and the second groove 12b end 10b side backward.Need
Bright, rear knife face 14 has the effect avoiding and being cut material to reduce cutting resistance.
It addition, the district being formed without groove 12 as shown in Fig. 2 (a), in the periphery 10c of cutting portion 10
Territory exists, bit diameter (external diameter) as land 16 (the first land 16a and the second land 16b)
It is maintained the size before forming groove 12.That is, under the section view line of vision vertical with central shaft O, land
The position of the 16 periphery 10c being comparable to cutting portion 10, in arc-shaped.First land 16a and
One groove 12a is arranged in correspondence with, and the second land 16b and the second groove 12b is arranged in correspondence with.
And, in the present embodiment, as shown in Fig. 2 (b), cutting portion 10 is from leading section 10a
Side has isolated area X, locally on-ramp Y and terminal area Z successively towards rearward end 10b side.
It should be noted that each side view of D1～D4 in Fig. 2 (b) be represent relative to paper from
On observe the drill bit Fig. 1 (b) successively from the direction shown in each arrow of D1, D2, D3 and D4
The figure of 1.Each arrow of D1～D4 represents contrary with the direction of rotation of the drill bit 1 shown in arrow a
Every the direction of 90 ° on direction.This point is the most identical.
Isolated area X is shown in the first groove 12a and second groove 12b such as Fig. 2 (b) and Fig. 3 (a)
Separated from each other arrange and as shown in Fig. 2 (b) under side-looking line of vision along with the phase towards rearward end 10b
The most close region.It should be noted that side-looking line of vision represents from the cutting portion 10 being equivalent to side
10c side, periphery observe cutting portion 10 state.
It addition, in the present embodiment, as shown in Fig. 3 (a), cutting portion 10 and central shaft
In the section that O is vertical, the first groove 12a and the second groove 12b that are positioned at isolated area X are mutually different
Shape, in contrast, be positioned at the first groove 12a and of 10a side, end more forward than isolated area X
Two groove 12b are same shape.
It addition, in the present embodiment, in isolated area X, the torsion angle of the first groove 12a is than
The torsion angle of two groove 12b is little.Such as, if the torsion angle of the first groove 12a is set to 15～35 °,
The torsion angle of the second groove 12b is set to 40～60 °.So, by the torsion by the first groove 12a
Corner is set to smaller, it can be ensured that the rigidity of isolated area X.
It should be noted that in the present embodiment, in isolated area X, the torsion of the second groove 12b
Corner is constant.It addition, in the region of 10a side, end more forward than isolated area X, the first groove
The torsion angle of 12a and the torsion angle of the second groove 12b do not limit especially, such as, be preferably set to
Identical.
As shown in Fig. 2 (b) and Fig. 4 (a), locally after on-ramp Y and isolated area X
10b side, end continuously, the part interflow and first of a part of the first groove 12a and the second groove 12b
Groove 12a and the second region parallel for groove 12b.It should be noted that Fig. 3 (b) is to represent independent zones
The figure of the borderline region between territory X and local on-ramp Y.
In the present embodiment, in the Y of on-ramp, local, one end 12a1 of the first groove 12a and
In one end 12a1 in other end 12a2 and one end 12b1 and other end 12b2 of the second groove 12b
One end 12b1 collaborates.I.e., in the present embodiment, in the Y of on-ramp, local, the first groove 12a
With the second interflow, groove 12b local.Here, local interflow refer to two structure positions not exclusively collaborate,
The state of local integration in the range of the principal character purpose each having can each served as.Change
Yan Zhi, although interflow, local refers to be positioned at the height of the wall maintenance regulation of groove between the two but passes through
The state that inside each other and the chip discharged can be exchanged visits.
It addition, in the present embodiment, the locally degree of depth and of the first groove 12a in the Y of on-ramp
The degree of depth of two groove 12b is identical.It should be noted that the degree of depth of groove 12 refers to from cutting portion 10
Week 10c is to the distance of the bottom of groove 12.Thereby, it is possible to by the inscribed circle 15 shown in Fig. 4 (a)
Diameter W guarantees relatively big and suppresses flexure, bending.It should be noted that in the shape of two grooves 12
In the case of shape is mutually different, it is not limited to same depth, as long as the degree of depth for being substantially the same is
Can.
It should be noted that inscribed circle 15 refers to can be formed in the section vertical with central shaft O
Maximum circle.It addition, the core that the diameter W of inscribed circle 15 is equivalent to drill bit 1 is thick, this drill bit 1
Core thickness become the index of rigidity of metering drill bit 1.
It addition, in the present embodiment, the locally groove width and of the first groove 12a in the Y of on-ramp
The groove width of two groove 12b is identical.That is, as shown in Fig. 4 (a), central shaft O and the first groove will be linked
The straight line F of local merging part 12c of a part of 12a and a part of the second groove 12b extends
To periphery 10c some 12d to first groove 12a other end 12a2 the distance along periphery 10c,
Identical with the distance along periphery 10c of the other end 12b2 of a 12d to second groove 12b.Thus,
The central authorities of groove are collaborated, therefore, it is possible to suppression chip is easily concentrated owing to local merging part 12c is positioned at local
The groove of Yu Yifang and produce the situation of chip blocking, by chip is scattered in two grooves 12 in appropriateness
State under discharge, it is possible to increase chip discharge.It should be noted that the reality carried out by inventor
The result tested is, it is judged that the groove width of the first groove 12a and the groove width of the second groove 12b are preferably respectively set as
40～the scope of 60%.
It addition, in the present embodiment, as shown in Fig. 4 (a), cut in the Y of on-ramp, local
In the section vertical with central shaft O in portion 10, between local merging part 12c and central shaft O
When distance is L1, distance between central shaft O and the periphery 10c of cutting portion 10 is L2, L1 and
L2 has the relation of (1/3) L2≤L1≤L2.It addition, in the present embodiment, cut open above-mentioned
In face, the diameter W of distance L1 and inscribed circle 15 has the relation of L1 ＜ W.According to said structure,
The wall being positioned at above-mentioned groove between the two is able to maintain that the height of regulation.
It addition, in the present embodiment, as shown in Fig. 2 (b), in the Y of on-ramp, local, the
One groove 12a and the second groove 12b compares the position being positioned against 10a side, leading section.
As shown in Fig. 2 (b) and Fig. 4 (b), after terminal area Z and on-ramp, local Y
10b side, end is continuously and after only existing the rear end 12a3 and the second groove 12b of the first groove 12a
The region of the side in end 12b3.In the present embodiment, in the Z of terminal area, only existed
The rear end 12a3 of the first groove 12a.
It addition, in the present embodiment, when from 10a side, leading section perspective cutting portion 10, the first groove
The rear end 12b3 of the rear end 12a3 and the second groove 12b of 12a is with the central shaft O of cutting portion 10 as base
Standard is point-symmetrically.
And, Fig. 4 (c) illustrates the position of the rear end 12a3 being equivalent to the first groove 12a, is groove 12
Sectional view under the state terminated.In this case, inscribed circle 15 and land 16 outer Monday each other
Cause.
According to the drill bit 1 having involved by the present embodiment of above such structure, at interflow, local
In the Y of region, owing to two grooves 12 have the part at interflow and keep the part of each groove shape, therefore
The end 10b side backward, chip cooperation ground flowed at each groove 12 can be discharged.It addition,
In the rearward end 10b side i.e. terminal area Z of the cutting portion 10 easily concentrated in bending stress, due to
The groove of only one side extends, therefore, it is possible to by the core thickness of drill bit 1, i.e. inscribed circle shown in Fig. 3 and Fig. 4
The diameter W of 15 guarantees relatively big and suppresses flexure, bending.As a result of which it is, involved by present embodiment
And drill bit 1 can have the hole machined of excellence and the excellent resistance to property lost concurrently.
It addition, according to the drill bit 1 involved by present embodiment, in the Y of on-ramp, local, first
Groove 12a is positioned at the position than the second 10a side, groove 12b forward end, in the Z of terminal area, only deposits
The first groove 12a's in having the rear end 12b3 of rear end 12a3 and the second groove 12b of the first groove 12a
Rear end 12a3, therefore, is positioned at the 10a side, leading section of cutting portion 10 and chip is passed through at first first
Groove 12a extends to the position than the second groove 12b end 10b side rearward, it is possible to play excellence
Chip discharge.For instance, it is possible to the material being imbued with ductility is i.e. easily become the aluminum of longer chip,
Copper Foil such chip entirety is drawn laterally from the surface being cut material and discharges it.
It should be noted that in the drill bit 1 of present embodiment, such as, the external diameter of blade 11 is not enough
0.6mm, is preferably the Small-diameter drill less than 0.3mm, it is possible to be suitable for use as deep hole machining drill bit.
The especially drill bit 1 of present embodiment, is suitable to be easily subject to the perforate being cut material etc. of hot injury
Processing.It addition, in the drill bit 1 of present embodiment, such as, when the length of axis is (from blade 11
Length terminating to groove 12) be L, diameter (external diameter of blade 11) is when being D, it is possible to suitable
It is the deep hole machining of more than 5 in L/D.
(the second embodiment)
It follows that with reference to Fig. 5, the drill bit involved by second embodiment of the present invention is carried out in detail
Explanation.It should be noted that in Figure 5, sometimes to the constituting portion identical with above-mentioned Fig. 1～Fig. 4
Minute mark notes identical reference and the description thereof will be omitted.It should be noted that for present embodiment
For drill bit, the basic structure of Fig. 1 etc. is identical with the drill bit 1 of the first embodiment, therefore mainly illustrates
With the difference of the drill bit 1 of the first embodiment, and omit the explanation of duplicate contents.
In the present embodiment, different from above-mentioned embodiment, as it is shown in figure 5, at interflow, local
In the Y of region, the first groove 12a is positioned at the position than the second 10a side, groove 12b forward end, and at end
In end regions Z, only exist the rear end 12a3 and the rear end 12b3 of the second groove 12b of the first groove 12a
In the rear end 12b3 of the second groove 12b.Thus, the rear end 12b3 of the second groove 12b extends to than position
The rear end 12a3 more posteriorly end 10b side of the first groove 12a in the 10a side, leading section of cutting portion 10
Position.Owing to arranging with staggering before and after the first groove 12a and the second groove 12b, therefore, by will be by
The chip of two blade 11 generations is similarly discharged from both, it is possible to suppression chip is wound in cutting portion
10。
Other structures are identical with the drill bit 1 involved by the first above-mentioned embodiment, therefore the description thereof will be omitted.
(the 3rd embodiment)
It follows that the drill bit involved by third embodiment of the present invention is carried out with reference to Fig. 6 and Fig. 7
Describe in detail.It should be noted that in Fig. 6 and Fig. 7, sometimes to identical with above-mentioned Fig. 1～Fig. 5
The constituting portion minute mark identical reference of note and the description thereof will be omitted.For present embodiment drill bit and
Speech, owing to the basic structure of Fig. 1 etc. and the drill bit 1 of the first embodiment are identical, therefore main explanation and
The difference of the drill bit 1 of the first embodiment, and omit the explanation of duplicate contents.
In the present embodiment, different from above-mentioned embodiment, as shown in Figure 6, at interflow, local
In the Y of region, the first groove 12a is positioned at the position than the second groove 12b end 10b side rearward, and at end
In end regions Z, only exist the rear end 12a3 and the rear end 12b3 of the second groove 12b of the first groove 12a
In the rear end 12a3 of the first groove 12a.Thus, identically with the second embodiment, the first groove 12a
Rear end 12a3 extend to the rear end of the second groove 12b than the 10a side, leading section being positioned at cutting portion 10
The position of 12b3 more posteriorly end 10b side.Owing to staggering ground before and after the first groove 12a and the second groove 12b
Arrange, therefore, by the chip generated by two blades 11 is similarly discharged from both, it is possible to
Suppression chip is wound in cutting portion 10.
It addition, in the present embodiment, in isolated area X, the torsion angle of the first groove 12a is than
The torsion angle of two groove 12b big (with reference to Fig. 7).Such as, as long as the torsion angle of the first groove 12a is set to
50～70 °, the torsion angle of the second groove 12b is set to 40～60 °.It should be noted that at this
In embodiment, in isolated area X, the torsion angle of the second groove 12b is constant.
Other structures are identical with the drill bit 1 involved by the first above-mentioned embodiment, therefore the description thereof will be omitted.
(the 4th embodiment)
It follows that the drill bit involved by the 4th embodiment of the present invention is carried out specifically with reference to Fig. 8
Bright.It should be noted that in fig. 8, sometimes to the constituting portion minute mark identical with above-mentioned Fig. 1～Fig. 7
Note identical reference and the description thereof will be omitted.It should be noted that for the drill bit of present embodiment
For, the basic structure of Fig. 1 etc. is identical with the drill bit 1 of the first embodiment, therefore main explanation and the
The difference of the drill bit 1 of one embodiment, and omit the explanation of duplicate contents.
In the present embodiment, different from above-mentioned embodiment, as shown in Figure 8, at interflow, local
In the Y of region, the first groove 12a is positioned at the position than the second groove 12b end 10b side rearward, and at end
In end regions Z, only exist the rear end 12a3 and the rear end 12b3 of the second groove 12b of the first groove 12a
In the rear end 12b3 of the second groove 12b.Thus, identically with the first embodiment, it is positioned at cutting portion
The second groove 12b that the 10a side, leading section of 10 and chip are passed through at first extends to than the first groove 12a rearward
The position of 10b side, end, therefore, it is possible to play excellent chip discharge.For instance, it is possible to will be imbued with
The material of ductility i.e. easily becomes the aluminum of longer chip, Copper Foil such chip entirety from being cut
The surface of material is drawn laterally and discharges it.
Other structures are identical with the drill bit 1 involved by above-mentioned first embodiment, therefore the description thereof will be omitted.
<manufacture method of machining thing>
It follows that use the Fig. 9 manufacturer to the machining thing involved by embodiments of the present invention
Method illustrates.In the present embodiment, with the drill bit 1 involved by the first above-mentioned embodiment it is
Example illustrates.
The manufacture method of the machining thing of present embodiment includes following (i)～the operation of (iv).
I (), as shown in Fig. 9 (a), is cut configuration drill bit 1 above material 100 ready
Operation.
(ii) then, make drill bit 1 centered by rotary shaft O rotate to arrow a direction, make brill
1 moves to arrow b direction, makes the operation being cut material 100 near drill bit 1.
(iii) as shown in Fig. 9 (b), by make drill bit 1 further towards being cut material 100,
Make the first blade 11a and the second blade 11b of the drill bit 1 being rotating and be cut material 100 surface
The contact of desired position, and be cut material 100 and formed the operation of through hole 101.
(iv) as shown in Fig. 9 (c), drill bit 1 is moved to arrow c direction, make drill bit 1 and quilt
The operation that cutting material 100 separates.
By manufacturing the machining thing 110 shown in Fig. 9 (c) through above such each procedure.
Drill bit 1 can play the hole machined of excellence.
It should be noted that for instance, it is possible to be fixed on be provided with drill bit 1 by being cut material 100
On the workbench of work mechanism, make drill bit 1 when rotating near being cut material 100, by
This carries out the operation of (ii).It addition, in the operation of (ii), be cut material 100 and drill bit
1 relatively close to, such as can also make to be cut material 100 near drill bit 1.
In (iii) operation, from the viewpoint of obtaining good machined surface, it is preferably set to drill bit
A part of region of the rearward end 10b side in the cutting portion 10 of 1 is the most through is cut material 100.That is,
By make this part of region as (margin) region, edge of chip discharge and function,
The chip discharge of excellence can be played.
(iv) operation of operation and above-mentioned (ii) in the same manner, is cut material 100 and drill bit 1
Relatively separate, such as, can also make to be cut material 100 and separate from drill bit 1.
It should be noted that when the above-mentioned shown material 100 that is cut is carried out repeatedly machining
Time, such as, when to be cut material 100 to one and form multiple through hole 101, repeat to make
Drill bit 1 keeps the first blade 11a and the second blade 11b that make drill bit 1 under the state rotated and is cut
Cut the operation of the diverse location contact of material 100.
Above, although exemplify several embodiments involved in the present invention, but the present invention does not limit to
In above-mentioned embodiment, without departing from the purport of the present invention, it becomes possible to arbitrarily changed, this is
Self-evident.
Such as, the shape of cutting portion 10 is not limited to the structure of above-mentioned embodiment, but can
Use the normally used shape of those skilled in the art.Such as, cutting portion 10 can also be core thick,
The i.e. diameter W of inscribed circle 15 is taper as leading section 10a becomes greatly towards rearward end 10b.
It addition, cutting portion 10 can also be bit diameter (external diameter) along with from leading section 10a towards rear end
Portion 10b and become big or tilt with diminishing.In addition it is also possible to arrange undercut portions at cutting portion 10.
It addition, in the above-described embodiment, although by the degree of depth and the second groove 12b of the first groove 12a
The degree of depth be set to constant but it also may be instead configured to, first groove 12a in cutting portion 10
The degree of depth and the second groove 12b the degree of depth at least one party change.Specifically, as shown in Figure 10,
At cutting portion 10 from region to isolated area X, the 10a side, leading section, along with towards rear
10b side, end and increase the degree of depth of groove 12, degree of depth 12a4 of the i.e. first groove 12a and the second groove 12b
Degree of depth 12b4, and can arrive local on-ramp Y till.Thereby, it is possible to raising chip
Discharge property and make hole site stable accuracy.It should be noted that in this variation shown in Figure 10,
The structure that degree of depth 12a4 of the first groove 12a and degree of depth 12b4 of the second groove 12b all change is shown.?
In the case of Gai, along with predetermined portion Y1 from on-ramp, local Y subtracts towards rearward end 10b side
The degree of depth of sulculus 12, it is possible to the degree of depth of the groove 12 recovered to the 10a of leading section.Thus, by
In recovering the size to the 10a of leading section, therefore by core is thick, i.e. inscribed circle 15 diameter W
The rigidity of drill bit 1 can be kept.Here, the degree of depth of groove 12 preferably makes the degree of depth of the first groove 12a
Degree of depth 12b4 of 12a4 and the second groove 12b changes when remaining identical.
Although it addition, be not provided with gap at cutting portion 10 in the above-described embodiment but it also may
In the leading section 10a of the cutting portion 10 formation gap, position in addition to blade 11.Furthermore, it is also possible to
Gap is extended to from leading section 10a the region of rearward end 10b side.Gap have minimizing drill bit 1 with
The effect of the contact between the inwall in the processing hole being cut material, and can aid in chip discharge
The raising of property.
It addition, in the above-described embodiment, although by the first groove 12a and the groove width of the second groove 12b
It is configured to identical but it also may instead, in the Y of on-ramp, local, makes the first groove 12a
And the groove width of the side being positioned at 10a side, leading section that second in groove 12b is more than the groove width of the opposing party.By
This, bigger chip can be effectively discharged out via the groove 12 of 10a side, leading section.
Claims (19)
1. a drill bit, wherein,
Described drill bit possesses columned cutting portion, and this cutting portion has: be positioned at front end separated from each other
First blade in portion and the second blade；Respectively with described first blade and described second blade continuously and court
First groove of end spiral extension and the second groove backward,
Described cutting portion has isolated area, locally on-ramp and terminal area,
At described isolated area, described first groove is arranged separated from each other with described second groove, and
Along with close to each other towards described rearward end under side-looking line of vision；
On-ramp, described local is continuous, in described local with the described rear end portion side of described isolated area
On-ramp, a part for described first groove is collaborated and described first groove with a part of of described second groove
Parallel with described second groove；
Described terminal area is continuous with the described rear end portion side of on-ramp, described local, and at described end
The side in the rear end of described first groove and the rear end of described second groove is only existed in end regions,
At least one party in described first groove and described second groove with the periphery of described cutting portion as base
The accurate degree of depth is along with the deepest position of the degree of depth from on-ramp, described local is towards described rear end portion side
And diminish.
Drill bit the most according to claim 1, wherein,
At described cutting portion from region to described isolated area, the side, described leading section, described
The degree of depth on the basis of the periphery of described cutting portion of at least one party in the first groove and described second groove
Along with becoming big towards described rear end portion side, the increase of the described degree of depth is until on-ramp, described local is
Only.
Drill bit the most according to claim 1 and 2, wherein,
The degree of depth on the basis of the periphery of described cutting portion of described first groove and described second groove is identical.
Drill bit the most according to claim 1 and 2, wherein,
When having an X-rayed described cutting portion from side, described leading section, the rear end of described first groove and described second
The rear end of groove on the basis of the central shaft of described cutting portion point-symmetrically.
Drill bit the most according to claim 1 and 2, wherein,
When observing described cutting portion from side, described leading section, described first blade and described second blade
On the basis of the central shaft of described cutting portion point-symmetrically.
Drill bit the most according to claim 1 and 2, wherein,
In the section with central axis of described cutting portion, be positioned at from described cutting portion described before
Described first groove at the region of end side extremely described isolated area is same shape with described second groove,
And described first groove being positioned at described isolated area is mutually different shape with described second groove.
Drill bit the most according to claim 1 and 2, wherein,
In on-ramp, described local, described first groove is positioned at than described second groove by described leading section
The position of side,
In described terminal area, only exist rear end and the rear end of described second groove of described first groove
In the rear end of described first groove.
Drill bit the most according to claim 1 and 2, wherein,
In on-ramp, described local, described first groove is positioned at than described second groove by described leading section
The position of side,
In described terminal area, only exist rear end and the rear end of described second groove of described first groove
In the rear end of described second groove.
Drill bit the most according to claim 7, wherein,
In described isolated area, the torsion angle of described first groove is less than the torsion angle of described second groove.
Drill bit the most according to claim 8, wherein,
In described isolated area, the torsion angle of described first groove is less than the torsion angle of described second groove.
11. drill bits according to claim 1 and 2, wherein,
In on-ramp, described local, described first groove is positioned at than described second groove by described rearward end
The position of side,
In described terminal area, only exist rear end and the rear end of described second groove of described first groove
In the rear end of described first groove.
12. drill bits according to claim 1 and 2, wherein,
In on-ramp, described local, described first groove is positioned at than described second groove by described rearward end
The position of side,
In described terminal area, only exist rear end and the rear end of described second groove of described first groove
In the rear end of described second groove.
13. drill bits according to claim 11, wherein,
In described isolated area, the torsion angle of described first groove is more than the torsion angle of described second groove.
14. drill bits according to claim 12, wherein,
In described isolated area, the torsion angle of described first groove is more than the torsion angle of described second groove.
15. drill bits according to claim 1 and 2, wherein,
In described isolated area, the torsion angle of described second groove is constant.
16. drill bits according to claim 1 and 2, wherein,
In on-ramp, described local, described first groove and described second groove it is positioned at described front end
The groove width of one side of side, portion is more than the groove width of the opposing party.
17. drill bits according to claim 1 and 2, wherein,
In the section with the central axis of described cutting portion in on-ramp, described local, work as institute
State the local merging part of a part for the first groove and a part for described second groove and described central shaft it
Between distance be L1, distance between described central shaft and the periphery of described cutting portion is when being L2, institute
State L1 and described L2 and there is the relation of (1/3) L2≤L1≤L2.
18. drill bits according to claim 1 and 2, wherein,
In the section with the central axis of described cutting portion in on-ramp, described local, work as institute
State the local merging part of a part for the first groove and a part for described second groove and described central shaft it
Between a diameter of W that distance is L1, inscribed circle time, described L1 and described W has L1 ＜ W's
Relation.
The manufacture method of 19. 1 kinds of machining things, wherein,
The manufacture method of described machining thing includes:
Make the operation that the drill bit according to any one of claim 1 to 18 rotates around rotary shaft；
Make described first blade of the described drill bit being rotating and described second blade and be cut material
The operation of contact；
The operation that material separates it is cut with described drill bit described in making.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-288077 | 2011-12-28 | ||
| JP2011288077 | 2011-12-28 | ||
| PCT/JP2012/066516 WO2013099326A1 (en) | 2011-12-28 | 2012-06-28 | Drill and method for manufacturing drilled product using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103998167A CN103998167A (en) | 2014-08-20 |
| CN103998167B true CN103998167B (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280063710.8A Active CN103998167B (en) | 2011-12-28 | 2012-06-28 | Drill bit and use the manufacture method of machining thing of this drill bit |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5845288B2 (en) |
| CN (1) | CN103998167B (en) |
| WO (1) | WO2013099326A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105451918B (en) * | 2013-08-26 | 2018-08-14 | 京瓷株式会社 | Drill bit and used the drill bit machined object manufacturing method |
| CN103752911B (en) * | 2013-12-31 | 2017-08-25 | 深圳市金洲精工科技股份有限公司 | A kind of microbit and its processing method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6478711A (en) * | 1987-09-21 | 1989-03-24 | Mitsubishi Metal Corp | Twist drill |
| JP2001322018A (en) * | 2000-05-19 | 2001-11-20 | Toshiba Tungaloy Co Ltd | Drill |
| JP2007307642A (en) * | 2006-05-17 | 2007-11-29 | Sumitomo Electric Hardmetal Corp | Drill |
| WO2010125881A1 (en) * | 2009-04-27 | 2010-11-04 | 京セラ株式会社 | Drill and method of cutting material to be cut using same |
| CN102476209A (en) * | 2010-11-22 | 2012-05-30 | 佑能工具株式会社 | Drilling tool |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM412822U (en) * | 2011-05-10 | 2011-10-01 | Topoint Technology Co Ltd | Improved chip-discharge structure of drill |
-
2012
- 2012-06-28 CN CN201280063710.8A patent/CN103998167B/en active Active
- 2012-06-28 WO PCT/JP2012/066516 patent/WO2013099326A1/en active Application Filing
- 2012-06-28 JP JP2013551495A patent/JP5845288B2/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6478711A (en) * | 1987-09-21 | 1989-03-24 | Mitsubishi Metal Corp | Twist drill |
| JP2001322018A (en) * | 2000-05-19 | 2001-11-20 | Toshiba Tungaloy Co Ltd | Drill |
| JP2007307642A (en) * | 2006-05-17 | 2007-11-29 | Sumitomo Electric Hardmetal Corp | Drill |
| WO2010125881A1 (en) * | 2009-04-27 | 2010-11-04 | 京セラ株式会社 | Drill and method of cutting material to be cut using same |
| CN102476209A (en) * | 2010-11-22 | 2012-05-30 | 佑能工具株式会社 | Drilling tool |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103998167A (en) | 2014-08-20 |
| JP5845288B2 (en) | 2016-01-20 |
| JPWO2013099326A1 (en) | 2015-04-30 |
| WO2013099326A1 (en) | 2013-07-04 |
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