CN107486578A - Cold fluted drill in one kind - Google Patents
Cold fluted drill in one kind Download PDFInfo
- Publication number
- CN107486578A CN107486578A CN201710581666.4A CN201710581666A CN107486578A CN 107486578 A CN107486578 A CN 107486578A CN 201710581666 A CN201710581666 A CN 201710581666A CN 107486578 A CN107486578 A CN 107486578A
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- China
- Prior art keywords
- sword
- guiding gutter
- face guiding
- valve
- side face
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- 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
- B23B51/00—Tools for drilling machines
- B23B51/06—Drills with lubricating or cooling equipment
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
Abstract
The invention discloses cold fluted drill in one kind, including shank and cutting portion, the cutting portion includes chip pocket, spiral cutting sword and apex point, the spiral cutting sword includes post sword and sword valve, the interior cold fluted drill also includes the interior cold hole through the shank and cutting portion, the apex point is provided with end face guiding gutter, the end face guiding gutter communicates with interior cold hole on the apex point, the sword valve is provided with least two side face guiding gutters, the side face guiding gutter arises from the post sword, and extend past the post sword and sword valve and terminate in the chip pocket, the axial diversion groove for connecting the end face guiding gutter and side face guiding gutter is additionally provided with the sword valve.The interior cold fluted drill of the present invention have the advantages that good cooling results, abrasion less, hole wall crudy is high and service life length.
Description
Technical field
The present invention relates to field metal cutting process field, more particularly to cold fluted drill in one kind.
Background technology
Drilling belongs to closed processing relative to other processing modes such as turning, milling, and is Continuous maching, therefore meeting
A large amount of cutting heats are produced, and cutting heat is difficult to export, and is rubbed simultaneously as hard alloy twist drill post sword exists with hole wall, hair
It is hot serious, cohesive material such as aluminium alloy, stainless steel and difficult-to-machine material such as titanium alloy, high temperature alloy etc. are especially processed, because
This, drilling cutters often use inner cold technology, and cutting fluid directly is delivered into apex point cutting tip, Ran Houtong by interior cold hole 8
Cross outside chip pocket tap, take away cutting heat；However, as shown in Figure 1, on the one hand, fried dough twist drill string sword 6 and hole wall are equal in magnitude,
It is in close contact, coolant is difficult to enter post sword 6 and sword valve region by chip pocket 3；On the other hand, hard alloy twist drill due to
Material fragility is too big, and to ensure not tipping, primary relief value is smaller, and apex point is also small with bottom hole gap, therefore coolant is more difficult
Enter post sword and sword valve region from apex point, most of coolant can only be by the tap of chip pocket 3 outside, cooling effect is limited；By
In above-mentioned reason, hard alloy twist drill in process, generally has that post sword serious wear, hole wall quality be low, the cutter longevity
The problems such as life reduces.
The content of the invention
The technical problem to be solved in the present invention is overcome the deficiencies in the prior art, there is provided a kind of good cooling results, abrasion less,
The interior cold fluted drill of hole wall crudy height and service life length.
In order to solve the above technical problems, the present invention uses following technical scheme：
Cold fluted drill in one kind, including shank and cutting portion, the cutting portion include chip pocket, spiral cutting sword and apex point, institute
Stating spiral cutting sword includes post sword and sword valve, and the interior cold fluted drill also includes the interior cold hole through the shank and cutting portion,
The apex point is provided with end face guiding gutter, and the end face guiding gutter communicates with interior cold hole on the apex point, is set on the sword valve
There are at least two side face guiding gutters, the side face guiding gutter arises from the post sword, and extends past the post sword and sword valve and stop
In the axial diversion groove that the connection end face guiding gutter and side face guiding gutter are additionally provided with the chip pocket, the sword valve.
Further improvement as above-mentioned technical proposal：
The cutting portion includes two groups of spiral cutting swords, and the sword valve of two groups of spiral cutting swords is respectively the first sword valve and the second sword
N bar side face guiding gutters are equipped with valve, the first sword valve and the second sword valve, wherein, N >=2, described in the N bars on the first sword valve
The starting point of side face guiding gutter and the distance on the apex point top are respectively L1、L2、……Ln, side face described in the N bars on the second sword valve
The starting point of guiding gutter and the distance on the apex point top are respectively C1、C2、……Cn, the side face guiding gutter（10）Width be
K, L1、L2、……LnAny one of numerical value and C1、C2、……CnAny one of numerical value be not mutually equal, and C1＞ L1+K。
The bearing of trend of side face guiding gutter described in N bars on the first sword valve is consistent and the extension of the side face guiding gutter
The direction of feed of direction and the interior cold fluted drill is into obtuse angle, the extension of side face guiding gutter described in the N bars on the second sword valve
Direction is consistent and the direction of feed of the bearing of trend of the side face guiding gutter and the interior cold fluted drill is into obtuse angle.
N >=3, L1、L2、……LnFor arithmetic progression, C1、C2、……CnFor arithmetic progression.
K≤（L2-L1）/ 2, K≤（C2-C1）/2.
The fried dough twist drill lip footpath is D, and it 2 is 2 α that drift angle, which is, and is met：L1＞ 0.5D/Tan α, C1＞ 0.5D/Tan α.
Compared with prior art, the advantage of the invention is that：
The interior cold fluted drill of the present invention, end face guiding gutter communicates in apex point with interior cold hole, after can guiding coolant by apex point
Knife face enters sword valve region, cooling column sword and sword valve, improves cooling effect, and side face guiding gutter arises from post sword, will be originally continuous
Post sword interrupt, i.e., at side face guiding gutter there is breach in post sword, the presence of the breach allow chip pocket coolant very
Sword valve region, cooling column sword and sword valve are smoothly flowed into, simultaneously as the presence of the breach, in a disguised form reduces fried dough twist drill string sword
Length, be also beneficial to reduce the friction of post sword and hole wall；Axial diversion groove connecting end surface guiding gutter and side face guiding gutter, especially
It is insertion side face guiding gutter, ensures the flow and pressure of coolant in side face guiding gutter.The present invention sets three kinds of guiding gutters simultaneously,
It can guarantee that coolant smoothly flow to each region of cutting portion, substantially increase the interior cold effect of drill bit, while do not influence bit cutting
The intensity and machining accuracy in portion, and the friction of post sword and hole wall can be reduced, cutting heat is reduced, improves hole wall crudy, is extended
The service life of interior cold fluted drill.
Brief description of the drawings
Fig. 1 is the end view of interior cold fluted drill of the prior art.
Fig. 2 is the structural representation of cold fluted drill in the present invention.
Fig. 3 is the end view of cold fluted drill in the present invention.
Fig. 4 is the enlarged drawing at A in Fig. 2.
Fig. 5 is that end face coolant of the present invention flows to schematic diagram.
Fig. 6 is that coolant flows to schematic diagram on B-B sections in Fig. 4.
Fig. 7 is that the coolant of cold fluted drill flows to schematic diagram in the present invention.
Each label represents in figure：
1st, shank；2nd, cutting portion；3rd, chip pocket；4th, spiral cutting sword；5th, apex point；6th, post sword；7th, sword valve；71st, the first sword valve；
72nd, the second sword valve；8th, interior cold hole；9th, end face guiding gutter；10th, side face guiding gutter；11st, axial diversion groove.
Embodiment
The present invention is described in further details below with reference to Figure of description and specific embodiment.
Fig. 2 to Fig. 7 shows a kind of embodiment of cold fluted drill in the present invention, the interior cold fluted drill, including shank 1 and cuts
Portion 2 is cut, cutting portion 2 includes chip pocket 3, spiral cutting sword 4 and apex point 5, and spiral cutting sword 4 includes post sword 6 and sword valve 7, interior cold
Fluted drill is also included through the interior cold hole 8 of shank 1 and cutting portion 2, and apex point 5 is provided with end face guiding gutter 9, end face guiding gutter 9 and
Interior cold hole 8 communicates on apex point 5, and sword valve 7 is provided with least two side face guiding gutters 10, and side face guiding gutter 10 arises from post sword 6, and
Extend past post sword 6 and sword valve 7 and terminate in chip pocket 3, connection end face guiding gutter 9 and side face guiding gutter 10 are additionally provided with sword valve 7
Axial diversion groove 11, end face guiding gutter 9 communicates in apex point 5 with interior cold hole 8, as shown in figure 5, not only increasing apex point 5 and hole
The gap at bottom is easy to coolant to reach apex point 5, and coolant can be guided swimmingly to enter sword valve by knife face after apex point 5
7 regions, cooling column sword 6 and sword valve 7, improve cooling effect, side face guiding gutter 10 arises from post sword 6, as shown in fig. 6, will connect originally
Continuous post sword 6 interrupts, i.e., post sword 6 has breach at side face guiding gutter 10, and the presence of the breach causes the coolant of chip pocket 3
Can be with the much smoother region of inflow sword valve 7, cooling column sword 6 and sword valve 7, simultaneously as the presence of the breach, in a disguised form reduces fiber crops
The length of flower drill string sword 6, the friction of post sword 6 and hole wall when being also beneficial to reduce processing；The connecting end surface water conservancy diversion of axial diversion groove 11
Groove 9 and side face guiding gutter 10, side face guiding gutter 10 is especially penetrated, ensure the flow and pressure of coolant in side face guiding gutter 10
Power.The present invention sets three kinds of guiding gutters simultaneously, as shown in fig. 7, can guarantee that coolant smoothly flow to 2 each region of cutting portion, significantly
The interior cold effect of drill bit is improved, while does not influence the intensity and machining accuracy in bit cutting portion 2, and post sword 6 and hole can be reduced
The friction of wall, cutting heat is reduced, improve hole wall crudy, the service life of cold fluted drill in extension.
In the present embodiment, cutting portion 2 includes two groups of spiral cutting swords 4, and the sword valves 7 of two groups of spiral cutting swords 4 is respectively the
3 side face guiding gutters 10, the first sword valve 71 are equipped with one sword valve 71 and the second sword valve 72, the first sword valve 71 and the second sword valve 72
On the starting point of N bar side faces guiding gutter 10 and the distance on the top of apex point 5 be respectively L1、L2... Ln, the N bars on the second sword valve 72
The starting point of side face guiding gutter 10 and the distance on the top of apex point 5 are respectively C1、C2... Cn, L1、L2、……LnAny one of number
Value is and C1、C2、……CnAny one of numerical value be not mutually equal, and C1＞ L1+ K, ensure the side face on two groups of spiral cutting swords 4
Cold fluted drill is axially offset including the start position of guiding gutter 10, that is, avoids cold fluted drill including the breach on two post swords 6
Axial direction be in same position and the 6 incomplete situation of post sword of interior cold fluted drill occur, the width of side face guiding gutter 10 is K,
Cause post sword 6 imperfect in order to avoid groove width is excessive, K≤（L2-L1）/ 2, K≤（C2-C1）/2.In the present embodiment, K=1mm.
In the present embodiment, the bearing of trends of 3 side face guiding gutters 10 on the first sword valve 71 is consistent and side face guiding gutter 10
Bearing of trend and interior cold fluted drill direction of feed into obtuse angle, the extension side of 3 side face guiding gutters 10 on the second sword valve 72
To the direction of feed of consistent and side face guiding gutter 10 bearing of trend and interior cold fluted drill into obtuse angle, i.e. side face guiding gutter 10 prolongs
The hand of spiral for stretching region with post sword 6 is roughly the same, and in process, the flowing of coolant is more with the rotation of interior cold fluted drill
It is then more smooth.
In order to ensure that the axial direction of cold fluted drill is equidistantly distributed to side face guiding gutter 10 inside, makes the distribution of coolant more
Uniformly, cooling effect, L are ensured1、L2、……LnFor arithmetic progression, C1、C2、……CnFor arithmetic progression, in the present embodiment, this reality
Apply in example, N=3, L1=3.8mm, L2=6.8mm、L3=9.8mm, C1=5.3mm、C2=8.3mm、C3=11.3mm。
Fried dough twist drill lip footpath is D, and it 2 is 2 α that drift angle, which is, and the starting point to avoid the starting point of post sword 6 from being side face guiding gutter 10 is formed
Breach, should meet：L1＞ 0.5D/Tan α, C1＞ 0.5D/Tan α.In the present embodiment, D=10mm, α=70 °.
Although the present invention is disclosed above with preferred embodiment, but is not limited to the present invention.It is any to be familiar with ability
The technical staff in domain, in the case where not departing from technical solution of the present invention scope, all using the technology contents pair of the disclosure above
Technical solution of the present invention makes many possible changes and modifications, or is revised as the equivalent embodiment of equivalent variations.Therefore, it is every
Without departing from the content of technical solution of the present invention, according to the technology of the present invention essence to any simple modification made for any of the above embodiments,
Equivalent variations and modification, it all should fall in the range of technical solution of the present invention protection.
Claims (6)
1. cold fluted drill in one kind, including shank（1）And cutting portion（2）, the cutting portion（2）Including chip pocket（3）, spiral cuts
Cut sword（4）And apex point（5）, the spiral cutting sword（4）Including post sword（6）With sword valve（7）, the interior cold fluted drill is also including passing through
Wear the shank（1）And cutting portion（2）Interior cold hole（8）, it is characterised in that：The apex point（5）It is provided with end face guiding gutter
（9）, the end face guiding gutter（9）With interior cold hole（8）In the apex point（5）On communicate, the sword valve（7）It is provided with least two
Side face guiding gutter（10）, the side face guiding gutter（10）Arise from the post sword（6）, and extend past the post sword（6）With sword valve
（7）And terminate in the chip pocket（3）, the sword valve（7）On be additionally provided with the connection end face guiding gutter（9）With side face guiding gutter
（10）Axial diversion groove（11）.
2. interior cold fluted drill according to claim 1, it is characterised in that：The cutting portion（2）Including two groups of spiral cuttings
Sword（4）, two groups of spiral cutting swords（4）Sword valve（7）Respectively the first sword valve（71）With the second sword valve（72）, the first sword valve
（71）With the second sword valve（72）On be equipped with N bar side face guiding gutters（10）, wherein, N >=2, the first sword valve（71）On N bars described in
Side face guiding gutter（10）Starting point and the apex point（5）The distance on top is respectively L1、L2、……Ln, the second sword valve（72）On
N bars described in side face guiding gutter（10）Starting point and the apex point（5）The distance on top is respectively C1、C2、……Cn, the week
Face guiding gutter（10）Width be K, L1、L2、……LnAny one of numerical value and C1、C2、……CnAny one of numerical value
It is not mutually equal, and C1＞ L1+K。
3. interior cold fluted drill according to claim 2, it is characterised in that：The first sword valve（71）On N bars described in week
Face guiding gutter（10）Bearing of trend is consistent and the side face guiding gutter（10）Bearing of trend and the interior cold fluted drill enter
To direction into obtuse angle, the second sword valve（72）On N bars described in side face guiding gutter（10）Bearing of trend is consistent and week
Face guiding gutter（10）Bearing of trend and the interior cold fluted drill direction of feed into obtuse angle.
4. interior cold fluted drill according to claim 3, it is characterised in that：N >=3, L1、L2、……LnFor arithmetic progression, C1、
C2、……CnFor arithmetic progression.
5. interior cold fluted drill according to claim 4, it is characterised in that：K≤（L2-L1）/ 2, K≤（C2-C1）/2.
6. cold fluted drill according to any one of claim 2 to 5, it is characterised in that：The fried dough twist drill lip footpath is D,
It 2 is 2 α that drift angle, which is, and is met：L1＞ 0.5D/Tan α, C1＞ 0.5D/Tan α.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710581666.4A CN107486578B (en) | 2017-07-17 | 2017-07-17 | Cold fluted drill in one kind |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710581666.4A CN107486578B (en) | 2017-07-17 | 2017-07-17 | Cold fluted drill in one kind |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107486578A true CN107486578A (en) | 2017-12-19 |
| CN107486578B CN107486578B (en) | 2019-04-12 |
Family
ID=60644500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710581666.4A Active CN107486578B (en) | 2017-07-17 | 2017-07-17 | Cold fluted drill in one kind |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107486578B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021038651A1 (en) * | 2019-08-23 | 2021-03-04 | 西研株式会社 | Deep-hole-boring single-blade drill |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2079544U (en) * | 1990-07-05 | 1991-06-26 | 江西采矿机械厂 | Group twist drill capable of drilling deeply |
| JPH0557517A (en) * | 1991-08-30 | 1993-03-09 | Nachi Fujikoshi Corp | Twist drill |
| JPH09512214A (en) * | 1994-04-27 | 1997-12-09 | ケンナメタル ヘルテル アクチェンゲゼルシャフト ウェルクツォイゲ ウント ハルトシュトッフェ | Drill |
| DE202005020829U1 (en) * | 2005-06-16 | 2006-11-16 | Kästner Präzisionswerkzeuge GmbH | Drill tool in particular twist drill with central coolant and lubricant duct, comprises specifically shaped fluid outlet |
| US20150314378A1 (en) * | 2012-12-20 | 2015-11-05 | Walter Ag | Twist drill |
| CN204975454U (en) * | 2015-09-07 | 2016-01-20 | 亚狮精密刀具(苏州)有限公司 | Steady type corrugate high accuracy drill bit |
-
2017
- 2017-07-17 CN CN201710581666.4A patent/CN107486578B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2079544U (en) * | 1990-07-05 | 1991-06-26 | 江西采矿机械厂 | Group twist drill capable of drilling deeply |
| JPH0557517A (en) * | 1991-08-30 | 1993-03-09 | Nachi Fujikoshi Corp | Twist drill |
| JPH09512214A (en) * | 1994-04-27 | 1997-12-09 | ケンナメタル ヘルテル アクチェンゲゼルシャフト ウェルクツォイゲ ウント ハルトシュトッフェ | Drill |
| DE202005020829U1 (en) * | 2005-06-16 | 2006-11-16 | Kästner Präzisionswerkzeuge GmbH | Drill tool in particular twist drill with central coolant and lubricant duct, comprises specifically shaped fluid outlet |
| US20150314378A1 (en) * | 2012-12-20 | 2015-11-05 | Walter Ag | Twist drill |
| CN204975454U (en) * | 2015-09-07 | 2016-01-20 | 亚狮精密刀具(苏州)有限公司 | Steady type corrugate high accuracy drill bit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021038651A1 (en) * | 2019-08-23 | 2021-03-04 | 西研株式会社 | Deep-hole-boring single-blade drill |
| US11376672B2 (en) | 2019-08-23 | 2022-07-05 | Nishiken Inc. | Single-edge drill for forming a deep hole |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107486578B (en) | 2019-04-12 |
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