CN201371262Y - Iron notch opening drill - Google Patents
Iron notch opening drill Download PDFInfo
- Publication number
- CN201371262Y CN201371262Y CN200920063703U CN200920063703U CN201371262Y CN 201371262 Y CN201371262 Y CN 201371262Y CN 200920063703 U CN200920063703 U CN 200920063703U CN 200920063703 U CN200920063703 U CN 200920063703U CN 201371262 Y CN201371262 Y CN 201371262Y
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- CN
- China
- Prior art keywords
- blade
- drill
- notch opening
- air inlet
- fixed block
- 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 relates to an iron notch opening drill used in blast furnace ironmaking, comprising a body and a blade. A central air inlet hole is arranged in the front end of the body, and the outer part is uniformly divided into two or three blade fixing blocks. An axial chip space is arranged among the fixing blocks, and a vent communicated with the central air inlet hole is arranged in the chip space. The utility model is characterized in that the outer side surface of each blade fixing block is a conical surface the external diameter of which is reduced gradually from the rear end to the front end, and the dovetail-shaped bottom part of the blade is in interference fit and connection with a dovetail groove on the outer side surface of each blade fixing block. The front end part of the drill is conical. The drill has the advantages of small rotation resistance, fast notch opening speed, short notch opening time and high work efficiency, and meanwhile the drill deformation can be prevented. The blade and the blade fixing blocks are firmly assembled by the dovetail grooves and are not easy to be fallen off, and the use life is long.
Description
Technical field
The utility model relates to a kind of drilling tool parts, the tapping outlet drill bit that uses in particularly a kind of blast furnace ironmaking.
Background technology
In the blast furnace ironmaking, when coming out of the stove, molten iron need implement drilling to blast furnace taphole with opening machinery, beat tapping outlet, wherein the fixing dignity of the blade of the tapping outlet drill bit that generally uses at present is the plane, blade is welded on the cutter hub, the drill bit rotational resistance is big, and opening speed is slow, the time is long, and blade easily comes off, deformed damaged.
Summary of the invention
The purpose of this utility model is in order to overcome the above-mentioned weak point of prior art, and the tapping outlet drill bit of a kind of high efficiency, long service life is provided.
The purpose of this utility model is achieved in that the tapping outlet drill bit comprises body, blade, there are center fresh air inlet, outside evenly to be separated into 2-3 blade fixed block in the body leading section, have axial chip area between every adjacent two blade fixed blocks, the air vent that is communicated with the center fresh air inlet is arranged in each chip area, the lateral surface that it is characterized in that the blade fixed block is the taper surface that external diameter reduces gradually from the rear end forward end, and the swallow-tail form bottom of blade is connected with the dovetail groove interference fit on the blade fixed block lateral surface.
The utility model is owing to adopt above architecture advances, and the tapered shape of chisel edge portion is when drill bit pierces tapping hole, form a cylindric gap between tapping hole internal diameter and outside diameter, reduced rotational resistance, opening speed is fast, the time short, high efficiency can prevent the drill bit distortion simultaneously.Be the dovetail groove assembling between blade and the blade fixed block, when drill bit at high temperature during tapping outlet, the reason of being heated simultaneously owing to blade and blade fixed block, blade not only can not come off because of high temperature, can make on the contrary that blade is more fastening on the blade fixed block not to come off because of expanded by heating, thus the service life of having improved drill bit.
Description of drawings
Fig. 1 is the structural representation of existing tapping outlet drill bit;
Fig. 2 is the utility model structural representation;
Fig. 3 is the left view of Fig. 2.
The specific embodiment
Now illustrated embodiment is made detailed description to the utility model in conjunction with the accompanying drawings.
As Fig. 2, shown in Figure 3, the tapping outlet drill bit comprises body 6, blade 1, there are center fresh air inlet 5, outside to be separated into two blade fixed blocks 2 of symmetry in body 6 leading sections, have axial chip area 3 between the blade fixed block, the air vent 4 that is communicated with center fresh air inlet 5 is arranged in each chip area, in body 6 rearward end internal thread that is connected with drilling rod is arranged.The lateral surface of blade fixed block 2 is the taper surface that external diameter reduces gradually from the rear end forward end, be pressed into bottom the swallow-tail form of blade 1 in the dovetail groove on blade fixed block 2 lateral surfaces of heating, blade 1 forms fastening interference fit at normal temperatures with blade fixed block 2 and is connected, and blade 1 upper surface is the cutting inclined-plane.
Claims (2)
1, a kind of tapping outlet drill bit, comprise body (6), blade (1), there are center fresh air inlet (5), outside evenly to be separated into 2-3 blade fixed block (2) in body (6) leading section, have axial chip area (3) between every adjacent two blade fixed blocks, the air vent (4) that is communicated with center fresh air inlet (5) is arranged in each chip area, the lateral surface that it is characterized in that blade fixed block (2) is the taper surface that external diameter reduces gradually from the rear end forward end, and the swallow-tail form bottom of blade (1) is connected with the dovetail groove interference fit on blade fixed block (2) lateral surface.
2, tapping outlet drill bit as claimed in claim 1 is characterized in that blade (1) upper surface is the cutting inclined-plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920063703U CN201371262Y (en) | 2009-03-13 | 2009-03-13 | Iron notch opening drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920063703U CN201371262Y (en) | 2009-03-13 | 2009-03-13 | Iron notch opening drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201371262Y true CN201371262Y (en) | 2009-12-30 |
Family
ID=41497344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920063703U Expired - Fee Related CN201371262Y (en) | 2009-03-13 | 2009-03-13 | Iron notch opening drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201371262Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102935603A (en) * | 2012-11-19 | 2013-02-20 | 奇瑞汽车股份有限公司 | Blowing device for processing center knife handle and processing center |
| CN105018674A (en) * | 2015-07-28 | 2015-11-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Drill bit for electric furnace tapping hole |
| CN107932399A (en) * | 2017-12-15 | 2018-04-20 | 苏州沸迩灵精密制造有限公司 | A kind of long-life cutter for receiver |
-
2009
- 2009-03-13 CN CN200920063703U patent/CN201371262Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102935603A (en) * | 2012-11-19 | 2013-02-20 | 奇瑞汽车股份有限公司 | Blowing device for processing center knife handle and processing center |
| CN105018674A (en) * | 2015-07-28 | 2015-11-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Drill bit for electric furnace tapping hole |
| CN107932399A (en) * | 2017-12-15 | 2018-04-20 | 苏州沸迩灵精密制造有限公司 | A kind of long-life cutter for receiver |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091230 Termination date: 20130313 |