CN102837040A - Molded flat drill - Google Patents
Molded flat drill Download PDFInfo
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- CN102837040A CN102837040A CN 201110171578 CN201110171578A CN102837040A CN 102837040 A CN102837040 A CN 102837040A CN 201110171578 CN201110171578 CN 201110171578 CN 201110171578 A CN201110171578 A CN 201110171578A CN 102837040 A CN102837040 A CN 102837040A
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- drill bit
- drill
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- flat
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Abstract
The invention relates to a molded flat drill. The molded flat drill is characterized in that the molded flat drill is in an integrated molding structure and comprises a cylindrical handle part (1), wherein a flat drill bit is connected with the front end of the handle part; a transition arc (2) is arranged at a connection part between the handle part and the drill bit; the drill bit is in a two-stage type structure; the width of a first-stage drill bit (3) arranged at the front end of the drill bit is smaller than that of a second-stage drill bit (4) arranged at the back of the first-stage drill bit; an edge point (5) is arranged at the top end of the first-stage drill bit; an edge point angle of the edge point (5) is 90 degrees; the first-stage drill bit is transited to the second-stage drill bit through a chamfer; cutting edges (6) are arranged at the edges of the edge point and the first-stage drill bit; and a chamfer edge (7) is arranged at the transition part between the first-stage drill bit and the second-stage drill bit. With the adoption of the molded flat drill, a molded hole with a bottom surface cone and a hole chamfer can be molded once, so that the working efficiency is improved greatly; in addition, as the molded hole is molded once, the coaxiality and the overall precision of all parts are also improved greatly; and as the flat drill bit is adopted by the molded flat drill, a chip discharge groove of the molded flat drill is large, and the cutting edges are sharp, the surface smoothness of the processed hole is improved.
Description
Technical field
The present invention relates to a kind of aperture knife tool, particularly a kind of chit drill.
Background technology
In the prior art, when processing has the moulding hole of labyrinth, generally need use many, like the moulding hole of processing belt bottom surface awl and aperture chamfering cutter; Generally need to use Twist Drill earlier, re-use the tack milling cutter bottom surface, hole is scabbled, use conical milling cutter to process the base cone that portals then; Use rose reamer processing aperture chamfering at last, so, processing a moulding hole needs four cutter; Waste time and energy, and, need tool setting again behind the replacing cutter; Certainly exist error in the tool setting process, to such an extent as to the each several part coaxiality deviation is big, moulding hole precision is lower.
Summary of the invention
In order to overcome above-mentioned defective, the object of the present invention is to provide a kind of moulding chit drill, but the moulding hole of one-shot forming band bottom surface awl and aperture chamfering.
In order to solve the problems of the technologies described above, the technical scheme that the present invention adopts is:
A kind of moulding chit drill, its structure that is formed in one comprises a columniform shank; Said shank forward end is connected with a flat drill bit, and said shank and drill bit junction are provided with transition arc, and said drill bit is a secondary formula structure; Wherein, the one-level drill bit width that is arranged at front end is less than the secondary drill bit that is arranged at thereafter, and said one-level drill end is provided with an apex point; The blade tip angle of said apex point is 90 °; Through the chamfering transition, blade tip and one-level drill margin place are provided with cutting edge between the I and II drill bit, and I and II drill bit transition Chamfer Edge place is provided with chamfering blades.
Beneficial effect of the present invention is: but the moulding hole of one-shot forming band bottom surface awl and aperture chamfering, operating efficiency promotes greatly, and simultaneously, because the moulding hole is one-shot forming, each several part axiality and overall precision also promote greatly; In addition, this moulding chit drill adopts flat drill bit, and its chip area space is big, and cutting edge is sharp, has improved the surface flatness of machining hole.
Description of drawings
Fig. 1 is the structure chart of moulding chit drill of the present invention.
The specific embodiment
As shown in Figure 1:
The moulding chit drill of present embodiment, the structure that is formed in one comprises a columniform shank 1; Said shank forward end is connected with a flat drill bit, and said shank and drill bit junction are provided with transition arc 2, and said drill bit is a secondary formula structure; Wherein, one-level drill bit 3 width that are arranged at front end are less than the secondary drill bit 4 that is arranged at thereafter, and said one-level drill end is provided with a blade tip 5; The blade tip angle of said blade tip 5 is 90 °; Through the chamfering transition, blade tip and one-level drill margin are provided with cutting edge 6 between the I and II drill bit, and I and II drill bit transition position is provided with chamfering blades 7.But the moulding hole of this moulding chit drill one-shot forming band bottom surface awl and aperture chamfering, operating efficiency promotes greatly, and simultaneously, because the moulding hole is one-shot forming, each several part axiality and overall precision also promote greatly; In addition, this moulding chit drill adopts flat drill bit, and its chip area space is big, and cutting edge is sharp, has improved the surface flatness of machining hole.
Claims (1)
1. a moulding chit drill is characterized in that, its structure that is formed in one; Comprise a columniform shank (1), said shank forward end is connected with a flat drill bit, and said shank and drill bit junction are provided with transition arc (2); Said drill bit is a secondary formula structure, and wherein, one-level drill bit (3) width that is arranged at front end is less than the secondary drill bit (4) that is arranged at thereafter; Said one-level drill end is provided with a blade tip (5), and the blade tip angle of said blade tip (5) is 90 °, passes through the chamfering transition between the I and II drill bit; Blade tip and one-level drill margin are provided with cutting edge (6), and I and II drill bit transition position is provided with chamfering blades (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110171578 CN102837040A (en) | 2011-06-24 | 2011-06-24 | Molded flat drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110171578 CN102837040A (en) | 2011-06-24 | 2011-06-24 | Molded flat drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102837040A true CN102837040A (en) | 2012-12-26 |
Family
ID=47364911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110171578 Pending CN102837040A (en) | 2011-06-24 | 2011-06-24 | Molded flat drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102837040A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103658768A (en) * | 2013-12-17 | 2014-03-26 | 无锡雨田精密工具有限公司 | Forming flat drill |
| CN104190998A (en) * | 2014-07-30 | 2014-12-10 | 常州创伟工具制造有限公司 | Flat drill |
| CN105014125A (en) * | 2015-08-07 | 2015-11-04 | 杭州航天电子技术有限公司 | Two-side-edge slotting flat drill suitable for positive and reverse rotation machining |
| CN106216727A (en) * | 2016-07-29 | 2016-12-14 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of multi-stage stairs throttle orifice method for turning |
-
2011
- 2011-06-24 CN CN 201110171578 patent/CN102837040A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103658768A (en) * | 2013-12-17 | 2014-03-26 | 无锡雨田精密工具有限公司 | Forming flat drill |
| CN104190998A (en) * | 2014-07-30 | 2014-12-10 | 常州创伟工具制造有限公司 | Flat drill |
| CN105014125A (en) * | 2015-08-07 | 2015-11-04 | 杭州航天电子技术有限公司 | Two-side-edge slotting flat drill suitable for positive and reverse rotation machining |
| CN106216727A (en) * | 2016-07-29 | 2016-12-14 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of multi-stage stairs throttle orifice method for turning |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121226 |