CN109262028A - A kind of fluted drill - Google Patents
A kind of fluted drill Download PDFInfo
- Publication number
- CN109262028A CN109262028A CN201811267739.3A CN201811267739A CN109262028A CN 109262028 A CN109262028 A CN 109262028A CN 201811267739 A CN201811267739 A CN 201811267739A CN 109262028 A CN109262028 A CN 109262028A
- Authority
- CN
- China
- Prior art keywords
- sword
- column
- cutting
- chip pocket
- cutting edge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- B23B2251/20—Number of cutting edges
- B23B2251/202—Three cutting edges
Abstract
The invention discloses a kind of fluted drills, including cutting portion and shank, cutting portion includes apex point and spiral cutting sword, spiral cutting sword includes the first cutting edge and the second cutting edge, first cutting edge includes the first column sword and the first sword valve, second cutting edge includes the 4th column sword, third column sword and the second sword valve between the 4th column sword and third column sword, the first chip pocket is formed between first column sword and the 4th column sword, the second chip pocket is formed between first sword valve and third column sword, in the central axis perpendicular to cutting portion and any plane that intersects with spiral cutting sword, central axis and the intersection point of the plane are O, the intersection point of first column sword and the first chip pocket is A, the intersection point of 4th column sword and the first chip pocket is D, the intersection point of third column sword and the second chip pocket is C, A, D, C is equal with the distance between O, if angle AOC is β, Meet: 150 ° of 180 ° of < β <.The hole that the present invention has the advantages that autobalance, processes is agonic.
Description
Technical field
The present invention relates to metal cutting tool more particularly to a kind of fluted drills.
Background technique
Well known fluted drill uses symmetric design, and theoretically, radial cutting force is balance.However, in actual production
In, due to various reasons, such as vibration of the fabrication error of fluted drill, the inhomogeneities of workpiece material, lathe etc., in fluted drill
There can be a random attached cutting power F ' in boring procedure and the hole drilled out occur so as to cause fluted drill force unbalance
The problems such as diameter is bigger than normal, and hole wall is coarse.
In order to enhance the stability of drilling, often using Double-margin, even multiple-cutting-edge band fluted drill.In patent document
A kind of four land fluted drills are disclosed in 88205377.9, it has four land guiding；In patent document CN102389991A
In, disclose Double-margin twist drill, it may have four lands, only land distributing position difference；In patent document
In CN205764069U, a kind of high-precision Double-margin twist drill is disclosed, its main feature is that the width of the Article 2 land is not small
In the width of first land；A kind of interior cooling hard for deep hole machining is disclosed in patent document CN205129020U
Alloy bit, the drill bit are even provided with N cylinder on sword valve and lead rib for being oriented to.Currently, all multiple-cutting-edge band fluted drills are deposited
In a common problem, theoretically, this 4 guiding swords are that diameter is identical, i.e., 4 points are concyclic, however in fluted drill manufacturing process
Inevitably there are deviations, 4 lands are simultaneously non-critical concyclic, also, two it is leading to sword as main cutting edge, always with hole wall holding
Contact；And be oriented to sword after two and be then constantly in contact, be detached from hole wall, so that vibrating aggravation in process, process
Hole more rib types are presented.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, provide a kind of energy autobalance, anti-vibration
With stability is good, the agonic fluted drill in aperture that processes.
In order to solve the above technical problems, the invention adopts the following technical scheme:
A kind of fluted drill, including cutting portion and shank, the cutting portion include apex point and spiral cutting sword, the cutting portion
With central axis, the spiral cutting sword includes the first cutting edge and the second cutting edge, and first cutting edge includes the first column
Sword, the second column sword and the first sword valve between the first column sword and the second column sword, second cutting edge include third column sword
With the second sword valve, form the first chip pocket between the first column sword and the second sword valve, the second column sword and third column sword it
Between form the second chip pocket, in perpendicular to central axis and any plane that intersects with spiral cutting sword, central axis and the plane
Intersection point be O, the intersection point of the first column sword and the first chip pocket is A, and the intersection point of the second column sword and the second chip pocket is B, the
The intersection point of three column swords and the second chip pocket is C, and A, B, C are equal with the distance between O, if angle AOC is β, is met: 150 ° of < β <
180°。
As a further improvement of the above technical scheme, it is preferred that the arc length of the first column sword is B1, the second column sword
Arc length is B2, and the arc length of third column sword is B3, is met: B1 ≠ B2 ≠ B3.
As a further improvement of the above technical scheme, it is preferred that B1 < B2, B3 < B2.
As a further improvement of the above technical scheme, it is preferred that the groove width of first chip pocket holds bits less than second
The groove width of slot.
As a further improvement of the above technical scheme, it is preferred that total arc length of first cutting edge is greater than second and cuts
Cut total arc length of sword.
In order to solve the above technical problems, the present invention uses following another technical solution:
A kind of fluted drill, including cutting portion and shank, the cutting portion include apex point and spiral cutting sword, the cutting portion
With central axis, the spiral cutting sword includes the first cutting edge and the second cutting edge, and first cutting edge includes the first column
Sword and the first sword valve, second cutting edge include the 4th column sword, third column sword and are set between the 4th column sword and third column sword
The second sword valve, form the first chip pocket between the first column sword and the 4th column sword, the first sword valve and third column sword it
Between form the second chip pocket, in perpendicular to central axis and any plane that intersects with spiral cutting sword, central axis and the plane
Intersection point be O, the intersection point of the first column sword and the first chip pocket is A, and the intersection point of the 4th column sword and the first chip pocket is D, the
The intersection point of three column swords and the second chip pocket is C, and A, D, C are equal with the distance between O, if angle AOC is β, is met: 150 ° of < β <
180°。
As a further improvement of the above technical scheme, it is preferred that the arc length of the first column sword is B1, the 4th column sword
Arc length is B4, and the arc length of third column sword is B3, is met: B1 ≠ B4 ≠ B3.
As a further improvement of the above technical scheme, it is preferred that B1 < B4, B3 < B4.
As a further improvement of the above technical scheme, it is preferred that the groove width of first chip pocket holds bits less than second
The groove width of slot.
As a further improvement of the above technical scheme, it is preferred that total arc length of first cutting edge is greater than second and cuts
Cut total arc length of sword.
Compared with the prior art, the advantages of the present invention are as follows:
Fluted drill of the invention, guiding sword (the first column sword, the second column sword and third column sword) have and only three, and
To being equidistant for central axis, in boring procedure, 3 points of A, B, C are easily able to stringent concyclic, ensure that the ruler in processed hole
Very little precision and form accuracy, and since the angle β meets 150 ° of 180 ° of < β <, it is meant that the first sword valve and the second sword valve are about fried dough twist
It is asymmetric for boring central axis, therefore three column swords are also mal-distribution, and two neither point-blank, it is ensured that mutual
It realizes and pre-equilibrates in perpendicular both direction.In this way, in boring procedure, even if still there can be attached cutting power F ', but
F ' can be decomposed, autobalance.Fluted drill energy autobalance of the invention solves easily to vibrate in processing, and stability is poor,
The problems such as aperture processed is bigger than normal, and tool wear is serious, and hole wall is coarse.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment of the present invention 1.
Fig. 2 is K direction view in Fig. 1.
Fig. 3 is the transverse sectional view of cutting portion in the embodiment of the present invention 1.
Fig. 4 is stress diagram during common Twist Drill in the prior art.
Fig. 5 is stress diagram in Double-margin twist drill boring procedure in the prior art.
Fig. 6 be the embodiment of the present invention 1 Twist Drill during stress diagram.
Fig. 7 is the Twist Drill of the embodiment of the present invention 1 in the process by stress diagram when attached cutting power F '.
Fig. 8 is the axial schematic diagram of fluted drill in the embodiment of the present invention 2.
Fig. 9 is the transverse sectional view of cutting portion in the embodiment of the present invention 2.
Each label indicates in figure:
100, cutting portion；101, central axis；200, shank；300, apex point；400, spiral cutting sword；410, the first cutting
Sword；411, the first column sword；412, the first sword valve；413, the second column sword；420, the second cutting edge；421, third column sword；422,
Two sword valves；423, the 4th column sword；510, the first chip pocket；520, the second chip pocket.
Specific embodiment
Below in conjunction with Figure of description and specific embodiment, invention is further described in detail.
Embodiment 1
As shown in Figure 1 to Figure 3, the fluted drill of the present embodiment, including cutting portion 100 and shank 200, cutting portion 100 include
Apex point 300 and spiral cutting sword 400, cutting portion 100 have central axis 101, and spiral cutting sword 400 includes the first cutting edge 410
With the second cutting edge 420, the first cutting edge 410 includes the first column sword 411, the second column sword 413 and is set to the first column sword 411 and the
The first sword valve 412 between two column swords 413, the second cutting edge 420 include third column sword 421 and the second sword valve 422, the first column sword
411 and second form the first chip pocket 510 between sword valve 422, form second between the second column sword 413 and third column sword 421 and hold
Consider slot 520 to be worth doing, in perpendicular to central axis 101 and any plane that intersect with spiral cutting sword 400, central axis 101 and the plane
Intersection point be O, the intersection point of the first column sword 411 and the first chip pocket 510 is A, the friendship of the second column sword 413 and the second chip pocket 520
Putting is B, and the intersection point of third column sword 421 and the second chip pocket 520 is C, and A, B, C are equal with the distance between O, if angle AOC is β,
Meet: 150 ° of 180 ° of < β <.
Fluted drill guiding sword (the first column sword 411, the second column sword 413 and third column sword 421) has and only three, and
To being equidistant for central axis 101, in boring procedure, 3 points of A, B, C are easily able to stringent concyclic, ensure that processed hole
Dimensional accuracy and form accuracy, and since the angle β meets 150 ° of 180 ° of < β <, it is meant that the first sword valve 412 and the second sword valve 422
It is asymmetric about fluted drill central axis 101, therefore three column swords are also mal-distribution, two neither point-blank,
It can guarantee to realize in two mutually perpendicular directions and pre-equilibrate.In this way, in boring procedure, even if still can exist additional
Cutting force F ', but F ' can be decomposed, autobalance.Fluted drill energy autobalance of the invention solves easily to shake in processing
It is dynamic, the problems such as stability is poor, and the aperture processed is bigger than normal, and tool wear is serious, and hole wall is coarse.
In the present embodiment, the arc length of the first column sword 411 is B1, and the arc length of the second column sword 413 is B2, third column sword 421
Arc length is B3, and the arc length reaction of each column sword is the size for generating frictional force when cutting with hole wall.Due to the first column sword 411 and
Three column swords 421 are main cutting functions, therefore the arc length B3 of the arc length B1 of the first column sword 411 and third column sword 421 will
Less than the arc length B2 of the second column sword 413, and the arc length of three column swords be all it is unequal, just can guarantee that each column sword produces in this way
Raw power is in different size, finally can be realized balance.
In the present embodiment, the groove width of the groove width of the first chip pocket 510 less than the second chip pocket 520.First cutting edge 410
Total arc length is greater than total arc length of the second cutting edge 420, further ensures the first cutting edge 410 and the second cutting edge 420 not
Symmetrical design.
It is illustrated in figure 4 stress diagram during common Twist Drill in the prior art, wherein the part a is fried dough twist
The force diagram of each column sword is bored, the part b is each column sword stress exploded view.Theoretically, known fluted drill β=180 °, sword valve and column sword
It is all symmetrical, Fa and Fc is equal in magnitude, contrary namely fluted drill stress balance in the Y-axis direction.But due to fried dough twist
The problems such as there are the vibrations of various errors, workpiece material uniformity and process equipment during making is drilled, in actual borehole mistake
Meeting fluted drill will receive attached cutting power F ' in journey, and after F ' effect, in Y direction, Fa and Fc meeting adjust automatically are balanced
The component of F '.But in the X-axis direction, component F ' the * cos α of F ' can not be balanced, and lead to fluted drill force unbalance, also, attached
It is random for adding the direction cutting force F ', therefore during actual borehole, fluted drill will appear random swing, cause hole wall it is coarse,
Diameter becomes larger, circularity, roughness are overproof, the short problem of cutter life.
It is illustrated in figure 5 stress diagram in Double-margin twist drill boring procedure in the prior art, the part c is that fluted drill is each
The force diagram of column sword, the part d is each column sword stress exploded view.Due to being influenced by fabrication error, 4 column swords can not be concyclic, is adding
It is practical by 3 power, Fa, Fb, Fc during work.Also due to β=180 °, Fa, Fc, can not in the X-axis direction without component
Fb*cos α is balanced, i.e. Double-margin twist drill is innately uneven, has biggish swing to be inclined to.In actual borehole, cut additional
It cuts under power F ' effect, although the component of a part of Fb can be balanced in X-direction, because attached cutting power is much smaller than cutting
Power is unable to complete equipilibrium and falls, therefore also results in the problems such as fluted drill is swung.
If Fig. 6 is stress diagram during Twist Drill of the invention, wherein the part e is each column sword of fluted drill
Force diagram, the part f is each column sword stress exploded view.Due to 150 ° of 180 ° of < β <, the first sword valve 412 and the second sword valve 422 be not right
Claim, therefore not on the same line, Fb, Fc can generate component to cutting force Fa, Fc in X, Y-axis at this time, be finally reached Fa,
Fb, Fc three pre-equilibrate.Hereafter, stress diagram (increases additional cut during being illustrated in figure 7 Twist Drill of the invention
Cut power F '), the part h is the force diagram of each column sword of fluted drill, and the part j is each column sword stress exploded view.It is no matter attached in boring procedure
Add how cutting force F ' size and Orientation changes, Fa ', Fb ', Fc ' can be adjusted therewith, eliminate the influence of F ', automatic to guarantee to bore
Fluted drill stress balance during hole improves borehole accuracy to reduce swing, extends cutter life.In specific implementation, pass through
It adjusts each column sword arc length (or width) B1, B2 and B3 value and realizes that Fa, Fb, Fc three pre-equilibrate.
Embodiment 2
As shown in Figure 8 and Figure 9, the fluted drill of the present embodiment, it is substantially the same manner as Example 1, it the difference is that only:
In the present embodiment, the first cutting edge 410 includes the first column sword 411 and the first sword valve 412, the second cutting edge 420 packet
Include the 4th column sword 423, third column sword 421 and the second sword valve 422 between the 4th column sword 423 and third column sword 421, first
The first chip pocket 510 is formed between column sword 411 and the 4th column sword 423, and is formed between the first sword valve 412 and third column sword 421
The intersection point of two chip pockets 520, the 4th column sword 423 and the first chip pocket 510 is D.That is the 4th column sword 423 of the present embodiment
It is equal with the second column sword 413 of embodiment 1, is equivalent to and moves the second column sword 413 on second cutting edge 420, and still protect
The total arc length for demonstrate,proving the first cutting edge 410 is greater than total arc length of the second cutting edge 420.Its principle is substantially the same manner as Example 1, herein
It repeats no more.
Although the present invention has been disclosed as a preferred embodiment, however, it is not intended to limit the invention.It is any to be familiar with ability
The technical staff in domain, without deviating from the scope of the technical scheme of the present invention, all using the technology contents pair of the disclosure above
Technical solution of the present invention makes many possible changes and modifications or equivalent example modified to equivalent change.Therefore, all
Without departing from the content of technical solution of the present invention, according to the present invention technical spirit any simple modification made to the above embodiment,
Equivalent variations and modification, all shall fall within the protection scope of the technical scheme of the invention.
Claims (10)
1. a kind of fluted drill, including cutting portion (100) and shank (200), the cutting portion (100) include apex point (300) and spiral shell
It revolves cutting edge (400), the cutting portion (100) has central axis (101), it is characterised in that: spiral cutting sword (400) packet
The first cutting edge (410) and the second cutting edge (420) are included, first cutting edge (410) includes the first column sword (411), second
Column sword (413) and the first sword valve (412) being set between the first column sword (411) and the second column sword (413), second cutting edge
It (420) include third column sword (421) and the second sword valve (422), shape between the first column sword (411) and the second sword valve (422)
At the first chip pocket (510), the second chip pocket (520) are formed between the second column sword (413) and third column sword (421),
Perpendicular in central axis (101) and any plane that intersects with spiral cutting sword (400), the friendship of central axis (101) and the plane
Point is O, and the intersection point of the first column sword (411) and the first chip pocket (510) is A, the second column sword (413) and the second chip pocket
(520) intersection point is B, and the intersection point of third column sword (421) and the second chip pocket (520) is C, the distance between A, B, C and O phase
Deng, if angle AOC is β, satisfaction: 150 ° of 180 ° of < β <.
2. fluted drill according to claim 1, it is characterised in that: the arc length of the first column sword (411) is B1, the second column
The arc length of sword (413) is B2, and the arc length of third column sword (421) is B3, is met: B1 ≠ B2 ≠ B3.
3. fluted drill according to claim 2, it is characterised in that: B1 < B2, B3 < B2.
4. according to claim 1 to fluted drill described in 3 any one, it is characterised in that: the slot of first chip pocket (510)
The wide groove width less than the second chip pocket (520).
5. according to claim 1 to fluted drill described in 3 any one, it is characterised in that: first cutting edge (410) it is total
Arc length is greater than total arc length of the second cutting edge (420).
6. a kind of fluted drill, it is characterised in that: including cutting portion (100) and shank (200), the cutting portion (100) includes boring
Sharp (300) and spiral cutting sword (400), the cutting portion (100) have central axis (101), it is characterised in that: the spiral is cut
Cutting sword (400) includes the first cutting edge (410) and the second cutting edge (420), and first cutting edge (410) includes the first column sword
(411) include the 4th column sword (423), third column sword (421) and be set to the first sword valve (412), second cutting edge (420)
The second sword valve (422) between 4th column sword (423) and third column sword (421), the first column sword (411) and the 4th column sword
(423) it is formed between the first chip pocket (510), forms second between the first sword valve (412) and third column sword (421) and hold bits
Slot (520), in perpendicular to central axis (101) and any plane that intersects with spiral cutting sword (400), central axis (101) with
The intersection point of the plane is O, and the intersection point of the first column sword (411) and the first chip pocket (510) is A, the 4th column sword (423) and the
The intersection point of one chip pocket (510) is D, and third column sword (421) and the intersection point of the second chip pocket (520) are C, between A, D, C and O
It is equidistant, if angle AOC is β, meets: 150 ° of 180 ° of < β <.
7. fluted drill according to claim 6, it is characterised in that: the arc length of the first column sword (411) is B1, the 4th column
The arc length of sword (423) is B4, and the arc length of third column sword (421) is B3, is met: B1 ≠ B4 ≠ B3.
8. fluted drill according to claim 7, it is characterised in that: B1 < B4, B3 < B4.
9. according to fluted drill described in claim 6 to 8 any one, it is characterised in that: the slot of first chip pocket (510)
The wide groove width less than the second chip pocket (520).
10. according to fluted drill described in claim 6 to 8 any one, it is characterised in that: first cutting edge (410)
Total arc length is greater than total arc length of the second cutting edge (420).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811267739.3A CN109262028A (en) | 2018-10-29 | 2018-10-29 | A kind of fluted drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811267739.3A CN109262028A (en) | 2018-10-29 | 2018-10-29 | A kind of fluted drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109262028A true CN109262028A (en) | 2019-01-25 |
Family
ID=65195448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811267739.3A Withdrawn CN109262028A (en) | 2018-10-29 | 2018-10-29 | A kind of fluted drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109262028A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4913603A (en) * | 1986-11-25 | 1990-04-03 | Sphinzwerke Muller AG | Spiral drill |
| CN102389991A (en) * | 2011-12-06 | 2012-03-28 | 株洲钻石切削刀具股份有限公司 | Double-margin twist drill |
| CN202726134U (en) * | 2012-04-05 | 2013-02-13 | 大连恒瑞精机有限公司 | Four-blade-belt twist drill |
| CN204867565U (en) * | 2015-09-02 | 2015-12-16 | 苏州阿诺精密切削技术股份有限公司 | Low moment of torsion drill tip is strengthened boring from revising |
| CN107427936A (en) * | 2015-03-23 | 2017-12-01 | 本田技研工业株式会社 | Drill bit |
-
2018
- 2018-10-29 CN CN201811267739.3A patent/CN109262028A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4913603A (en) * | 1986-11-25 | 1990-04-03 | Sphinzwerke Muller AG | Spiral drill |
| CN102389991A (en) * | 2011-12-06 | 2012-03-28 | 株洲钻石切削刀具股份有限公司 | Double-margin twist drill |
| CN202726134U (en) * | 2012-04-05 | 2013-02-13 | 大连恒瑞精机有限公司 | Four-blade-belt twist drill |
| CN107427936A (en) * | 2015-03-23 | 2017-12-01 | 本田技研工业株式会社 | Drill bit |
| CN204867565U (en) * | 2015-09-02 | 2015-12-16 | 苏州阿诺精密切削技术股份有限公司 | Low moment of torsion drill tip is strengthened boring from revising |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20190125 |