CN2433036Y - Fully grinding new-type groove central drill - Google Patents
Fully grinding new-type groove central drill Download PDFInfo
- Publication number
- CN2433036Y CN2433036Y CN 00226646 CN00226646U CN2433036Y CN 2433036 Y CN2433036 Y CN 2433036Y CN 00226646 CN00226646 CN 00226646 CN 00226646 U CN00226646 U CN 00226646U CN 2433036 Y CN2433036 Y CN 2433036Y
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- China
- Prior art keywords
- angle
- utility
- model
- fully grinding
- centre drill
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- Expired - Fee Related
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Abstract
The utility model relates to a full grinding central drill which belongs to the class of cutting tool for drilling holes and is provided with a pitch angle groove. The utility model is characterized in that the utility model is composed of a cutting edge, a holding straight bar, a chip discharging groove and a handle bar. The chip discharging groove is in helical shape, and the pitch angle of the helical groove is selected within 18 DEG to 35 DEG. The cutting angle is a symmetrical double-edge angle. The optimal selection of the pitch angle is 26 DEG to 30 DEG, the selection of a cone angle is 58 DEG to 75 DEG, and the selection of a drilling corner angle is 110 DEG to 130 DEG. The selection of depth of body clearance is 0.04 m to 0.20 m. The utility model has the advantages of good chip discharging performance, fast heat radiation, high smoothness and long service life.
Description
The utility model belongs to the fully grinding centre drill that cutlery class centering is used, particularly about a kind of fully grinding centre drill with lead angle groove.
Existing centre drill is straight trough chip removal or skewed slot chip removal and is the system of milling, and its grooved fineness is poor, influences chip removal and heat radiation, thus when punching frangibility, belong to the rough type cutlery, and existing centre drill is that the single-blade cutting stress is big, frangibility.
The purpose of this utility model is: a kind of fully grinding novel cell centre drill is provided, and its chip removal performance is good, and rapid heat dissipation is highly polished, long service life.
The technical solution of the utility model is: design a kind of fully grinding novel cell centre drill, it is characterized in that: it is made up of cutting edge, working beam, chip area, handle bar, and chip area is spiral-shaped.
The lead angle of described spirality chip area is chosen in 18 °～35 °.
Described centre drill can have cutting edge at handle bar one end, also can cutting edge be arranged at the two ends of handle bar, and the cutting edge of every end is the twolip of symmetry, and the cutting angle is the identical twolip angle of symmetry.
Described lead angle optimal selection is at 26 °～30 °; Cone angle is chosen in 58 °～75 °; Point angle is chosen in 110 °～130 °; The back-off amount is chosen in 0.04～0.20.
Characteristics of the present utility model are: because the centre drill of the utility model design, cut employing spiral flute profile on the groove row, break the notion of general centre drill straight trough shape or skewed slot shape, adopt 26 °～30 ° king bolt lift angles, solve the problem of chip removal and heat radiation, ensure the due mechanical performance of product, and perfect more with the helical curve flute profile outward appearance of grace.And the helicla flute centre drill is a fully grinding, and its chip area and cutting edge, working beam, handle bar are grinding and form, and its fineness is higher than general centre drill far away.Centre drill adopts two cuttings simultaneously of bearing at preceding cutting blade, utilizes helicla flute chip removal simultaneously, equals cutting stress like this and reduce half on cutting edge, so not easily broken long service life.
Below in conjunction with the embodiment accompanying drawing the utility model is described further.
Accompanying drawing 1 is the example structure schematic diagram.
Accompanying drawing 2 is left views of accompanying drawing 1.
Among the figure: 1, cutting edge; 2, working beam; 3, helical flute; 4, lead angle; 5, cone angle; 6, point angle.
As shown in the figure, the two ends of center drillstock bar have cutting edge 1, working beam 2, the helical flute 3 of symmetry to constitute, and the lead angle 4 of helical flute 3 is 26 °, and the cutting edge 1 of each end is the twolip of symmetry, and the cutting angle is the identical twolip angle of symmetry.Cone angle 5 is 66 °; Point angle 6 is 120 °; The back-off amount is 0.06.Centre drill also can be that an end has cutting edge 1, working beam 2, helical flute 3 to constitute.
Claims (4)
1, a kind of fully grinding novel cell centre drill, it is characterized in that: it is made up of cutting edge, working beam, chip area, handle bar, and chip area is spiral-shaped.
2, a kind of fully grinding novel cell centre drill according to claim 1, it is characterized in that: the lead angle of described spirality chip area is chosen in 18 °～35 °.
3, a kind of fully grinding novel cell centre drill according to claim 1, it is characterized in that: described centre drill can have cutting edge at handle bar one end, also can cutting edge be arranged at the two ends of handle bar, the cutting edge of every end is the twolip of symmetry, and the cutting angle is the identical twolip angle of symmetry.
4, a kind of fully grinding novel cell centre drill according to claim 1, it is characterized in that: described lead angle optimal selection is at 26 °～30 °; Cone angle is chosen in 58 °～75 °; Point angle is chosen in 110 °～130 °; The back-off amount is chosen in 0.04～0.20.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00226646 CN2433036Y (en) | 2000-07-28 | 2000-07-28 | Fully grinding new-type groove central drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00226646 CN2433036Y (en) | 2000-07-28 | 2000-07-28 | Fully grinding new-type groove central drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2433036Y true CN2433036Y (en) | 2001-06-06 |
Family
ID=33590448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00226646 Expired - Fee Related CN2433036Y (en) | 2000-07-28 | 2000-07-28 | Fully grinding new-type groove central drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2433036Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100503104C (en) * | 2003-08-13 | 2009-06-24 | 钴碳化钨硬质合金公司 | Drilling tool, drilling tool set comprising same and drilling device |
| CN103537734A (en) * | 2012-07-12 | 2014-01-29 | 李仕清 | Composite blade center bit or composite blade countersink bit |
| CN103706844A (en) * | 2012-10-01 | 2014-04-09 | 李仕清 | Combined-edge center drill or combined-edge countersink |
| CN107127376A (en) * | 2017-05-15 | 2017-09-05 | 海安国洋机械科技有限公司 | A kind of portable small-sized drill bit |
| CN114178598A (en) * | 2021-12-16 | 2022-03-15 | 铣立(上海)切削技术有限公司 | General corrugated milling cutter |
-
2000
- 2000-07-28 CN CN 00226646 patent/CN2433036Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100503104C (en) * | 2003-08-13 | 2009-06-24 | 钴碳化钨硬质合金公司 | Drilling tool, drilling tool set comprising same and drilling device |
| CN103537734A (en) * | 2012-07-12 | 2014-01-29 | 李仕清 | Composite blade center bit or composite blade countersink bit |
| CN103706844A (en) * | 2012-10-01 | 2014-04-09 | 李仕清 | Combined-edge center drill or combined-edge countersink |
| CN107127376A (en) * | 2017-05-15 | 2017-09-05 | 海安国洋机械科技有限公司 | A kind of portable small-sized drill bit |
| CN114178598A (en) * | 2021-12-16 | 2022-03-15 | 铣立(上海)切削技术有限公司 | General corrugated milling cutter |
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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 |