CN2194778Y - Three cutting twist drill - Google Patents
Three cutting twist drill Download PDFInfo
- Publication number
- CN2194778Y CN2194778Y CN 94218209 CN94218209U CN2194778Y CN 2194778 Y CN2194778 Y CN 2194778Y CN 94218209 CN94218209 CN 94218209 CN 94218209 U CN94218209 U CN 94218209U CN 2194778 Y CN2194778 Y CN 2194778Y
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- CN
- China
- Prior art keywords
- core
- cutting
- utility
- model
- blade
- 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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Abstract
The utility model provides a three-blade twist drill, which is composed of a shank part and a work part. The cutting part contains three main blades, three core blades and a drill tip which is on the intersection point of the three core blades. The front angle of the core blade is 0 DEG, and the ratio of the core diameter and the outer diameter is 0.35. The core blade of the utility model adopts zero front angle cutting to make the drill bit center accurately and do not generate orsional vibration in use. The utility model has the advantages of high rigidity, small axial force, less deformation of drill bit, straight and round processing hole, high surface smoothness and high cutting speed, and accordingly, the deficiency of a two-blade twist drill is effectively overcome.
Description
The utility model relates to a kind of metal cutting tool, the aperture knife tool in particularly a kind of metal cutting tool.
Existing aperture knife tool mostly is two sword fluted drills, it is made up of shank and operate portions, operate portions is made up of cutting portion and guide part, cutting portion includes two major cutting edges and a chisel edge, guide part includes two guiding seamed edges and two chip areas, and the ratio of its core diameter and external diameter is 0.125～0.145, because when the cutting beginning, chisel edge is the negative rake cutting, and the drill bit poor rigidity, so can produce twisting vibration, axial force is very big, centering is inaccurate, the drill bit easy deformation, the axially bored line of getting is not straight, and the processed Kong Buyuan that comes out, surface roughness is big, only is suitable for roughing.
In order to overcome above-mentioned deficiency, the purpose of this utility model provides a kind of standard of feeling relieved, does not produce three sword fluted drills of twisting vibration.
The purpose of this utility model realizes by following technical proposals.
The utility model is made up of shank and operate portions, and operate portions is made up of cutting portion and guide part, and guide part contains three guiding seamed edges and three chip areas; Cutting portion includes three major cutting edges, three core swords and an apex point, and apex point is on the intersection point of three core swords, and the anterior angle of core sword is 0 °.
Because the utility model is technically to change two swords into three swords and change chisel edge into the core sword and add an apex point again existing, adopts zero anterior angle cutting, the drill bit that makes is when work, and centering is accurate, does not produce twisting vibration, and axial force is little, and the drill bit distortion is little.Straight and the circle in the hole that processes, the surface smoothness height, cutting speed is fast.
Below will be described in further detail the utility model by specific embodiment.
Fig. 1 is a front view of the present utility model.
Fig. 2 is that the K of Fig. 1 is to view.
As shown in Figure 1 and Figure 2, the utility model is made up of shank 8 and operate portions, operate portions is made up of cutting portion and guide part 7, guide part 7 contains three guiding seamed edges 5 and three chip areas 6, cutting portion includes three major cutting edges 3, three core swords 2 and apex points 1, the intersection of knife face 4 is core sword 2 after adjacent two, article three, the intersection point of core sword 2 is exactly an apex point 1, the anterior angle of core sword 2 is 0 °, it adopts zero anterior angle cutting when the beginning cutting metal, in order to improve drill bit rigidity intensity, the ratio that makes core diameter and external diameter is 0.35.
Claims (2)
1, a kind of three sword fluted drills, it is made up of shank and operate portions, and operate portions is made up of cutting portion and guide part, and cutting portion contains major cutting edge, and guide part contains guiding seamed edge and chip area; It is characterized in that cutting portion contains three major cutting edges (3), three core swords (2) and an apex point (1), apex point (1) is on the intersection point of three core swords (2), and the anterior angle of core sword (2) is 0 °.
2, three sword fluted drills according to claim 1, the ratio that it is characterized in that core diameter and external diameter is 0.35.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94218209 CN2194778Y (en) | 1994-08-05 | 1994-08-05 | Three cutting twist drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94218209 CN2194778Y (en) | 1994-08-05 | 1994-08-05 | Three cutting twist drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2194778Y true CN2194778Y (en) | 1995-04-19 |
Family
ID=33833438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94218209 Expired - Fee Related CN2194778Y (en) | 1994-08-05 | 1994-08-05 | Three cutting twist drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2194778Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007030983A1 (en) * | 2005-09-14 | 2007-03-22 | Jiangsu Tiangong Tools Corp.Ltd. | Drill bit with high performance for chip removal |
| CN101767217B (en) * | 2009-12-25 | 2012-11-14 | 深圳市金洲精工科技股份有限公司 | Micro-bit and processing apparatus using the micro-bit |
| CN104985238A (en) * | 2015-06-29 | 2015-10-21 | 唐萍 | Drill bit |
-
1994
- 1994-08-05 CN CN 94218209 patent/CN2194778Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007030983A1 (en) * | 2005-09-14 | 2007-03-22 | Jiangsu Tiangong Tools Corp.Ltd. | Drill bit with high performance for chip removal |
| CN101767217B (en) * | 2009-12-25 | 2012-11-14 | 深圳市金洲精工科技股份有限公司 | Micro-bit and processing apparatus using the micro-bit |
| CN104985238A (en) * | 2015-06-29 | 2015-10-21 | 唐萍 | Drill bit |
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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 |