CN2659604Y - Bit for low hardness material - Google Patents
Bit for low hardness material Download PDFInfo
- Publication number
- CN2659604Y CN2659604Y CN 200320129703 CN200320129703U CN2659604Y CN 2659604 Y CN2659604 Y CN 2659604Y CN 200320129703 CN200320129703 CN 200320129703 CN 200320129703 U CN200320129703 U CN 200320129703U CN 2659604 Y CN2659604 Y CN 2659604Y
- Authority
- CN
- China
- Prior art keywords
- drill bit
- drill
- knife face
- slot
- back knife
- 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 drill bit for low hardness materials, which solves the problems of big cutting resistance and inaccuracy centering of a twist drill in the prior art and comprises two main edges and a back knife face. A slot is arranged on the position near the main edges of a drill point, and extends to the exterior margin of the drill bit along the back knife face from the position near the drill point, and the bottom of the slot is lower than the exterior margin of the drill bit. Because the existence of the slot, the chisel edge of the drill point becomes short, and a sharp angle formed by the two main blades becomes small after using the structure. Thus, the utility model has the advantages of small cutting resistance, easy positioning and hard slippage.
Description
Technical field
The utility model relates to a kind of drill bit, particularly a kind of low-durometer material drill bit.
Background technology
Fluted drill is with good, the broad-spectrum advantage of its versatility a large amount of production and use in worldwide.But, because it is longer that fluted drill knife faces after unbearable place is main by two intersect formed chisel edge, and the formed sharp angle of two main swords of drill bit end is big, make that the cutting resistance of fluted drill is big, centering is inaccurate, particularly when boring large diameter hole for the little low-durometer material of some volumes, often occur skidding, also be very easy to drilled thing is split to brill even pierce with electric hand drill.
Summary of the invention
For overcoming above-mentioned shortcoming, the utility model provides a kind of cutting resistance little, the low-durometer material drill bit that centering is accurate.
The utility model low-durometer material drill bit comprises main sword and back knife face, is provided with groove in the position of described closely unbearable main sword, and described groove is stretched to drill bit outer rim edge along the back knife face by nearly unbearable position, and the bottom of described groove is lower than the outer rim of drill bit.
After adopting this structure, because the existence of groove makes the chisel edge of apex point portion shorten, the formed sharp angle of two main swords is little, so cutting resistance is little, is easy to the location, is difficult for skidding.And, make the outer rim of both sides, drill bit end form second and third tip because channel bottom is lower than the outer rim of drill bit; In use, second and third tip can form annular ditch groove earlier on drilled thing, carry out from infiltrating to the drilling between the outer rim again, so be shaped, drilled thing is difficult for splitting.
Description of drawings
Fig. 1 is the schematic elevational view of the utility model low-durometer material with drill bit.
Fig. 2 is a vertical view of the present utility model shown in Figure 1.
The specific embodiment
With reference to Fig. 1, Fig. 2, a kind of low-durometer material drill bit comprises main sword 1 and back knife face 2, is provided with groove 3 in the position of described nearly unbearable main sword 1, described groove 3 is stretched to drill bit outer rim edge along back knife face 2 by nearly unbearable 1 position, and the bottom of described groove 3 is lower than the outer rim of drill bit.Like this, because the existence of groove 3 makes the chisel edge of apex point portion shorten, two main sword 1 formed sharp angles diminish, so cutting resistance is little, are easy to the location, are difficult for skidding.And, make the outer rim of both sides, drill bit end form second tip 41 and the 3 42 tip because groove 3 bottoms are lower than the outer rim of drill bit; In use, second tip 41 and the 3 42 tip can form annular ditch groove earlier on drilled thing, carry out from infiltrating to the drilling between the outer rim again, so be shaped, drilled thing is difficult for splitting.
In order to make cutting resistance little, as the novel further improvement of this usefulness, the sharp angle that described main tooth shape becomes is less than 90 degree.
Claims (2)
1, a kind of low-durometer material drill bit, comprise main sword and back knife face, it is characterized in that: the position at described closely unbearable main sword is provided with groove, and described groove is stretched to drill bit outer rim edge along the back knife face by nearly unbearable position, and the bottom of described groove is lower than the outer rim of drill bit.
2, low-durometer material drill bit as claimed in claim 1.It is characterized in that: the sharp angle that described main tooth shape becomes is less than 90 degree.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 200320129703 CN2659604Y (en) | 2003-12-22 | 2003-12-22 | Bit for low hardness material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 200320129703 CN2659604Y (en) | 2003-12-22 | 2003-12-22 | Bit for low hardness material |
Publications (1)
Publication Number | Publication Date |
---|---|
CN2659604Y true CN2659604Y (en) | 2004-12-01 |
Family
ID=34349999
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 200320129703 Expired - Fee Related CN2659604Y (en) | 2003-12-22 | 2003-12-22 | Bit for low hardness material |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN2659604Y (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104338977A (en) * | 2013-07-30 | 2015-02-11 | 上海名古屋精密工具股份有限公司 | Drill bit for machining holes in fiber composite materials |
CN104985239A (en) * | 2015-06-29 | 2015-10-21 | 唐萍 | Drill bit device |
CN106573316A (en) * | 2014-09-18 | 2017-04-19 | 住友电工硬质合金株式会社 | Drill |
-
2003
- 2003-12-22 CN CN 200320129703 patent/CN2659604Y/en not_active Expired - Fee Related
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104338977A (en) * | 2013-07-30 | 2015-02-11 | 上海名古屋精密工具股份有限公司 | Drill bit for machining holes in fiber composite materials |
CN104338977B (en) * | 2013-07-30 | 2018-11-27 | 上海名古屋精密工具股份有限公司 | For carrying out the drill bit of hole machined to fibrous composite |
CN106573316A (en) * | 2014-09-18 | 2017-04-19 | 住友电工硬质合金株式会社 | Drill |
CN106573316B (en) * | 2014-09-18 | 2018-12-04 | 住友电工硬质合金株式会社 | Drill bit |
CN104985239A (en) * | 2015-06-29 | 2015-10-21 | 唐萍 | Drill bit device |
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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 |