CN2185647Y - Multi-sharp-toothed deep hole drill - Google Patents
Multi-sharp-toothed deep hole drill Download PDFInfo
- Publication number
- CN2185647Y CN2185647Y CN 93235521 CN93235521U CN2185647Y CN 2185647 Y CN2185647 Y CN 2185647Y CN 93235521 CN93235521 CN 93235521 CN 93235521 U CN93235521 U CN 93235521U CN 2185647 Y CN2185647 Y CN 2185647Y
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- CN
- China
- Prior art keywords
- tooth
- angle
- centre
- drill bit
- external tooth
- 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.)
- Expired - Fee Related
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- Drilling Tools (AREA)
Abstract
The utility model relates to a multi-sharp-toothed deep hole drill. N middle horizontal teeth are arranged between a center tooth and an external tooth in radial direction. The other side of the center tooth and the external tooth are provided with N+1 middle pointed teeth (N equals 0, 1, 2, 3, 4, 5 and 6) in diametric direction. The side angle of an edge among the center tooth, the middle horizontal teeth and the external tooth is milled with an end surface tool side clearance (alpha<t>). The included angle (half point angle phi 2) between the edge of one side of the middle pointed teeth and the axial lead of multi-sharp-toothed deep hole drill is smaller than the included angle (half point angle phi 1) between the edge of the center tooth, the middle horizontal teeth and the external tooth and the axial lead of the multi-sharp-toothed deep hole drill. The column surface of the multi-sharp-toothed deep hole drill body is provided with a transfusion groove, and is provided with a damping block and two guide blocks. The utility model has the advantages of long service life, good lubricating and cooling performance, high drilling precision, etc.
Description
The utility model belongs to the cutter that is used for drilling machine, relates in particular to the drill bit of being with lubricated or cooling device.
The present side set bta deep hole drilling head that uses, have the homonymy of a centre tooth, centre tooth to have both sides between centre tooth in an external tooth, the drill bit radius and the external tooth radially to interlace more than or equal to an integer flat tooth in centre of 1 at place, drill end portion disalignment, the drill bit axial line is divided the flat tooth in centre of both sides and the sharp angle of external tooth and centre tooth equally.Be lower than the drill bit cutting edge of the flat tooth in center of side in addition on the cutting edge of centre tooth and external tooth is axial, and angle, end face rear flank has all been ground at the basil place of the middle flat tooth of side in addition.During with this drill bit drilling, cooling-lubricant mainly flows into cutting edge and drill bit chip removal mouth place by the circumference of bit body and the gap of borehole wall, pushes away bits, makes it cooling and lubricating.This drill bit chip removal and cooling and lubricating weak effect, and resultant radial force can not guarantee to point to guide pad, external tooth is stressed excessive, and positioning accuracy is poor at the bottom of the hole, and cutter is collapsed in vibration easily, and middle flat tooth slightly weares and teares or has the fritter tipping will cause immediately that whole cutter tooth collapses cutter.This drilling life of bit is short, low, the chip removal weak effect of boring accuracy.
The purpose of this utility model is to overcome the shortcoming of above-mentioned drill bit, provide that smooth and easy, the lubricated cooling performance of a kind of chip removal is good, long service life, drilling efficiency height, guiding are reliable, drilling steadily, the high multituberculate deep hole drill of boring accuracy.
For achieving the above object, the solution that the utility model adopts is: the place is provided with a centre tooth in the drill end disalignment, its circumferencial direction is provided with two guide pads, be provided with external tooth in centre tooth homonymy outer end, flat tooth in the middle of radially being provided with n between the centre tooth of drill bit radius and the external tooth is provided with n+1 centre pointed tooth (n=0,1,2,3,4,5,6) in that the centre tooth of drill bit radius is corresponding with the diametric side in addition of external tooth.Cutting edge side angle place mill between centre tooth, middle flat tooth and external tooth has end face rear flank angle (α
t).Angle (the half sharp angle φ of middle pointed tooth one side edge mouth and drill bit axial line
2) less than angle (the half sharp angle φ of centre tooth, middle flat tooth, external tooth cutting edge and drill bit axial line
1), on the cylindrical side of bit body, have the transfusion groove and be provided with damping block.
The pointed tooth increment is 12～18 ° near the angle (δ) of axial line one side edge mouth and drill bit axle center vertical line in the middle of the utility model, the angle, rear flank of the cutting edge side angle end face between centre tooth, middle flat tooth, the external tooth is 5～13 °, angle (the half sharp angle φ of centre tooth, middle flat tooth, external tooth cutting edge and drill bit axial line
1) be 72～75 °, angle (the half sharp angle φ of middle pointed tooth one side edge mouth and drill bit axial line
2) greater than 65 ° and less than 72 °.The cross section of transfusion groove is arc or triangle or rectangle on the utility model bit body face of cylinder.
The utility model is compared with side set bta deep hole drilling head, have drilling steadily, guiding is reliable, chip removal is smooth and easy, cooling is good, long service life, borehole accuracy advantages of higher.
Fig. 1 is the front view of an embodiment of the utility model.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is that the A of Fig. 2 is to view.
Below in conjunction with drawings and Examples the utility model is further described.
In Fig. 1,2, the place is processed with a centre tooth 3 in disalignment, drill bit end, there is an external tooth 5 the homonymy outer end of centre tooth 3, be that central angle that 1, one guide pad of two guide pads 1 and external tooth 5 be installed on 90 ° the direction is that 270 °, another guide pad 1 are 180 ° with the central angle of external tooth 5 at heart angle, circumference garden, drill bit end.Between the centre tooth 3 of drill bit radius and external tooth 5, radially be processed with a flat tooth 4 in centre, at corresponding staggered two the middle pointed tooths 2 that are processed with external tooth 5 diametric sides in addition of centre tooth 3 of drill bit radius, middle pointed tooth 2 increments are 16 ° near the cutting edge of axial line one side and the angle (δ) of drill bit axle center vertical line.Present embodiment external tooth 5 is near angle, the rear flank (α of middle flat tooth 4 cutting edge side angle end faces
T1) be 6 °, middle flat tooth 4 angle, rear flank (α near external tooth 5 cutting edge side angle end faces
T2) be 9 °, middle flat tooth 4 angle, rear flank (α near centre tooth 3 cutting edge side angle end faces
T3) be the rear flank angle (αs of 7 °, centre tooth 3 near middle flat tooth 4 cutting edge side angle end faces
T4) be 12 °.Angle (the half sharp angle φ of present embodiment centre tooth 3, middle flat tooth 4, external tooth 5 cutting edge drill bit axial lines
1) be 72 °, angle (the half sharp angle φ of middle pointed tooth 2 one side edge mouths and drill bit axial line
2) be 68 °.Being processed with two sliver transvers sections on the face of cylinder of bit body symmetrically is the transfusion groove of rectangle, can strengthen chip removal and cooling and lubricating effect.
In Fig. 2,3, a damping block 6 is housed on the face of cylinder of bit body, damping block 6 is used to reduce drill vibration, improves the stationarity of drilling, makes the corresponding raising of borehole accuracy of the present utility model, and has prolonged service life.
Also can design the multituberculate deep hole drill of other structure according to above-mentioned principle.The coupling of middle pointed tooth 2 and middle flat tooth 4 quantity is according to the width of the size of bit diameter and carbide cutter tool piece and definite.When the flat tooth 4 in 0 centre is set between centre tooth 3 and external tooth 5, at the pointed tooth 2 in the middle of side is provided with 1 in addition of centre tooth 3 and external tooth 5; When the flat tooth 4 in 1 centre is set between centre tooth 3 and external tooth 5, at the pointed tooths 2 in the middle of side is provided with 2 in addition of centre tooth 3 and external tooth 5; When the flat tooth 4 in 2 centres is set between centre tooth 3 and external tooth 5, at the pointed tooths 2 in the middle of side is provided with 3 in addition of centre tooth 3 and external tooth 5; When the flat tooth 4 in 3 centres is set between centre tooth 3 and external tooth 5, at the pointed tooths 2 in the middle of side is provided with 4 in addition of centre tooth 3 and external tooth 5.The rest may be inferred, according to the size of bit diameter, can design the multituberculate deep hole drill of concrete structure.
Claims (2)
1, a kind of multituberculate deep hole drill, the place is provided with a centre tooth [3] in drill end portion disalignment, on its circumferencial direction, be provided with two guide pads [1], be provided with external tooth [5] in centre tooth [3] homonymy outer end, flat tooth [4] in the middle of radially being provided with n between the centre tooth [3] of drill bit radius and the external tooth [5], it is characterized in that: at centre tooth [3] and the diametric corresponding n+1 of being provided with of side middle pointed tooth [2] (n=0 in addition of external tooth [5] of drill bit radius, 1,2,3,4,5,6), in centre tooth [3], cutting edge side angle place mill between middle flat tooth [4] and the external tooth [5] has end face rear flank angle (α
t), angle (the half sharp angle Φ of middle pointed tooth [2] one side edge mouths and drill bit axial line
2) less than angle (the half sharp angle Φ of centre tooth [3], middle flat tooth [4], external tooth [5] cutting edge and drill bit axial line
1), on the face of cylinder of bit body, have the transfusion groove and be provided with damping block [6].
2, according to the described multituberculate deep hole drill of claim 1, it is characterized in that: middle pointed tooth ［ 2 ］ increment is 12～18 ° near the angle (δ) of axial line one side edge mouth and drill bit axle center vertical line; Cutting edge side angle place's end between said centre tooth ［ 3 ］, middle flat tooth ［ 4 ］ and the external tooth ［ 5 ］ and the angle, rear flank be 5～13 °; Angle (the half sharp angle φ of said centre tooth ［ 3 ］, middle flat tooth ［ 4 ］, external tooth ［ 5 ］ cutting edge and drill bit axial line
1) be 72～75 °, angle (the half sharp angle φ of middle pointed tooth ［ 2 ］ one side edge mouths and drill bit axial line
2) greater than 65 ° and less than 72 °; The cross section of said transfusion groove is arc or triangle or rectangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93235521 CN2185647Y (en) | 1993-12-31 | 1993-12-31 | Multi-sharp-toothed deep hole drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93235521 CN2185647Y (en) | 1993-12-31 | 1993-12-31 | Multi-sharp-toothed deep hole drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2185647Y true CN2185647Y (en) | 1994-12-21 |
Family
ID=33810926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93235521 Expired - Fee Related CN2185647Y (en) | 1993-12-31 | 1993-12-31 | Multi-sharp-toothed deep hole drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2185647Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1078844C (en) * | 1995-06-08 | 2002-02-06 | 国家宇航公司 | Method for production of plate with structural and acoustical characteristics and plate thereof |
| CN104070207A (en) * | 2014-06-20 | 2014-10-01 | 乐山斯堪纳机械制造有限公司 | Drill bit and method for processing deep hole of shaft type product |
-
1993
- 1993-12-31 CN CN 93235521 patent/CN2185647Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1078844C (en) * | 1995-06-08 | 2002-02-06 | 国家宇航公司 | Method for production of plate with structural and acoustical characteristics and plate thereof |
| CN104070207A (en) * | 2014-06-20 | 2014-10-01 | 乐山斯堪纳机械制造有限公司 | Drill bit and method for processing deep hole of shaft type product |
| CN104070207B (en) * | 2014-06-20 | 2016-05-11 | 乐山斯堪纳机械制造有限公司 | A kind of axis products deep hole processing drill bit and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |