CN201071374Y - Taper type centring drill - Google Patents
Taper type centring drill Download PDFInfo
- Publication number
- CN201071374Y CN201071374Y CNU2007200232555U CN200720023255U CN201071374Y CN 201071374 Y CN201071374 Y CN 201071374Y CN U2007200232555 U CNU2007200232555 U CN U2007200232555U CN 200720023255 U CN200720023255 U CN 200720023255U CN 201071374 Y CN201071374 Y CN 201071374Y
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- CN
- China
- Prior art keywords
- cone
- blade
- shaped body
- hole
- pilot bit
- 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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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The utility model provides a cone-shaped pilot drill bit, which comprises a cylinder. A conical body is arranged on the upper part of the cylinder; blades are evenly arranged on the conical body in the range of 360 degrees; the blades gradually lean to the longitudinal centerline of the conical body from bottom to top; a cambered groove is arranged between every two blades on the lateral surface of the conical body; the cambered groove is provided with an inclined through-hole. The utility model has the advantages that: the structures such as the tapered distribution of the blades ensures good centering of the drill bit; the hole is bored after centering, thus avoiding destroying a fire wall adjacent to an iron notch, preventing shatter and nick, remarkably prolonging the time for discharging molten iron in a single heat, increasing the molten iron output in the single heat, accelerating hole boring and reducing the single restoring intensity of the iron notch after discharging the molten iron.
Description
Technical field
The utility model relates to the taphole drilling machine drill bit that is used on the field of metallurgy iron-smelting blast furnace, is a kind of tapered pilot bit.
Background technology
Iron-smelting blast furnace needs to punch out molten iron on the furnace wall when tapping a blast furnace.The equipment that is used to punch is called taphole drilling machine.By disclosed structure as can be known: the drill bit that uses on the taphole drilling machine has more multiple structure; But its deficiency is comparatively obvious: which kind of structure no matter, its blade is straight type, make blade with respect to being parastate with pedestal (or claiming the bore bit body), each blade forms a big plane, with the drill bit plane work of rapping feeding mode is adopted on the iron notch plane, the drill bit of this structure easily destroys the iron mouth place on body of heater surface, the fragmentation and the cut on body of heater surface are increased, and the time that causes tapping a blast furnace shortens, and directly influences turnout, and repair time is long, and labour intensity is big etc.
Summary of the invention
The utility model for achieving the above object, a kind of tapered pilot bit is provided, it can be accurately in the centering back boring of iron mouth place, furnace wall, make near the furnace wall of iron mouth and fragmentation or cut do not occur, improve the antiscour time of iron mouth place stemming under the same terms, prolong single heat and put the molten iron time, increase single heat molten iron output, reduce and to put behind the molten iron single of iron notch and repair intensity.
The utility model for achieving the above object, be achieved through the following technical solutions: a kind of tapered pilot bit, comprise right cylinder, right cylinder top is cone-shaped body, uniform blade in 360 ° of scopes of cone-shaped body, blade tilts to the cone-shaped body longitudinal cenlerline from bottom to top gradually, offers deep-slotted chip breaker between per two blades on the cone-shaped body side, offers oblique through hole on the deep-slotted chip breaker.Uniform first blade, second blade and the 3rd blade in 360 ° of scopes of cone-shaped body, every blade are all and slanted angle α 1 is set between the cone-shaped body longitudinal cenlerline.Every blade all and the angle α 1 that tilts between the cone-shaped body longitudinal cenlerline be 21 °-89 °.Every blade top all folds the cross break point to cone-shaped body top center position, and first cross break point, the second cross break point and the 3rd cross break point are the vertex of drill bit.First fin is set on first blade, second fin is set on second blade, the 3rd fin is set on the 3rd blade, every fin both sides are provided with the inclined-plane respectively, and the bottom on inclined-plane is higher than the cone-shaped body surface.Offer the first oblique through hole, the second oblique through hole and the 3rd oblique through hole on the cone-shaped body side, tiltedly be provided with angle α 2 between through hole medullary ray and the cone-shaped body medullary ray.Offer open holes on the right cylinder, the open holes upper end is provided with boss, offers through hole on the boss, and through hole communicates with oblique through hole respectively.Every blade all and the angle α 1 that tilts between the cone-shaped body longitudinal cenlerline be 25 °-40 °.Tiltedly the angle α 2 between through hole medullary ray and the cone-shaped body medullary ray is 25 °-75 °.
The utility model has the advantages that: because structures such as the tapered distributions of blade, drill bit is felt relieved, the boring of centering back, do not destroy near the furnace wall of iron mouth, fragmentation or cut do not occur, prolonged single heat significantly and put the molten iron time, increased single heat molten iron output, and increased the speed of boring, reduced and put behind the molten iron single of iron notch and repair intensity.
Description of drawings
Embodiment
1 is right cylinder among the figure, and right cylinder 1 top is cone-shaped body, uniform 3 blades in 360 ° of scopes of cone-shaped body, and every blade tilts to the cone-shaped body longitudinal cenlerline from bottom to top gradually, is offering deep-slotted chip breaker between per two blades on the cone-shaped body side.First deep-slotted chip breaker 9, second deep-slotted chip breaker 3 and the 3rd deep-slotted chip breaker 11.Be convenient to fast slag tap smoothly.Offer oblique through hole on the deep-slotted chip breaker.Cone-shaped body described in the utility model is uniform first blade 7, second blade 6 and the 3rd blade 5 in 360 ° of scopes, every blade all and slanted angle α 1 is set between the cone-shaped body longitudinal cenlerline, the angle of this angle α 1 is 21 °-89 °, preferred 25 °-40 °.Accurately can all fold the cross break point to cone-shaped body top center position on every blade top in order further to finish positioned centrally, the first cross break point 14, the second cross break point 16 and the 3rd cross break point 15 are the vertex of drill bit.In order to increase penetration rate, make boring more stable, first fin 17 can be set on first blade 7, second fin 19 is set on second blade 6, the 3rd fin 18 is set on the 3rd blade 5, and every fin both sides are provided with the inclined-plane respectively, and the bottom on inclined-plane is higher than the cone-shaped body surface.Offer first oblique through hole 8, second oblique through hole 4 and the 3rd oblique through hole 10 on the cone-shaped body described in the utility model side, tiltedly be provided with angle α 2 between through hole medullary ray and the cone-shaped body medullary ray, this angle α 2 is 25 °-75 ° and is advisable.Being convenient to better chip with drilling removes.Offer open holes 20 on the right cylinder 1 described in the utility model, open holes 20 upper ends are provided with boss 21, offer through hole 13 on the boss 21, and through hole 13 communicates with oblique through hole respectively, are convenient to further remove sooner chip.Fin both sides on the blade described in the utility model are provided with the structure on inclined-plane respectively, with the 3rd blade 5 among Fig. 2 is the example explanation: fin 18 both sides on the 3rd blade 5 are provided with first inclined-plane 22 and second inclined-plane 23 respectively, the ramp structure that the bottom on first inclined-plane 22 is higher than the fin both sides on cone-shaped body surface 24, the second blades 6 and first blade 7 is identical with the 3rd blade 5 structures.When the utility model uses, be installed on the drilling rod parts of taphole drilling machine, drill bit directly is centered in the iron notch place of furnace wall, close the direct feeding boring of rapping, use the rapping feeding after entering certain depth, improve tapping outlet speed again.12 is arc chambeies among the figure, the 2nd, and boss.
Claims (9)
1. tapered pilot bit, comprise right cylinder (1), it is characterized in that: right cylinder (1) top is cone-shaped body, uniform blade in 360 ° of scopes of cone-shaped body, blade tilts to the cone-shaped body longitudinal cenlerline from bottom to top gradually, offer deep-slotted chip breaker between per two blades on the cone-shaped body side, offer oblique through hole on the deep-slotted chip breaker.
2. a kind of tapered pilot bit according to claim 1, it is characterized in that: uniform first blade (7), second blade (6) and the 3rd blade (5) in 360 ° of scopes of cone-shaped body, every blade are all and slanted angle (α 1) is set between the cone-shaped body longitudinal cenlerline.
3. a kind of tapered pilot bit according to claim 2 is characterized in that: every blade all and the angle that tilts between the cone-shaped body longitudinal cenlerline (α 1) be 21 °-89 °.
4. a kind of tapered pilot bit according to claim 1 and 2, it is characterized in that: every blade top all folds the cross break point to cone-shaped body top center position, and first cross break point (14), second cross break point (16) and the 3rd cross break point (15) are the vertex of drill bit.
5. a kind of tapered pilot bit according to claim 2, it is characterized in that: first fin (17) is set on first blade (7), second fin (19) is set on second blade (6), the 3rd fin (18) is set on the 3rd blade (5), every the fin both sides are provided with the inclined-plane respectively, and the bottom on inclined-plane is higher than the cone-shaped body surface.
6. a kind of tapered pilot bit according to claim 1, it is characterized in that: offer the first oblique through hole (8), the second oblique through hole (4) and the 3rd oblique through hole (10) on the cone-shaped body side, tiltedly be provided with angle (α 2) between through hole medullary ray and the cone-shaped body medullary ray.
7. according to claim 1,2,3,5 or 6 each described a kind of tapered pilot bit, it is characterized in that: offer open holes (20) on the right cylinder (1), open holes (20) upper end is provided with boss (21), offers through hole (13) on the boss (21), and through hole (13) communicates with oblique through hole respectively.
8. a kind of tapered pilot bit according to claim 2 is characterized in that: every blade all and the angle that tilts between the cone-shaped body longitudinal cenlerline (α 1) be 25 °-40 °.
9. a kind of tapered pilot bit according to claim 6 is characterized in that: tiltedly the angle (α 2) between through hole medullary ray and the cone-shaped body medullary ray is 25 °-75 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200232555U CN201071374Y (en) | 2007-06-15 | 2007-06-15 | Taper type centring drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200232555U CN201071374Y (en) | 2007-06-15 | 2007-06-15 | Taper type centring drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201071374Y true CN201071374Y (en) | 2008-06-11 |
Family
ID=39549935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200232555U Expired - Fee Related CN201071374Y (en) | 2007-06-15 | 2007-06-15 | Taper type centring drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201071374Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2007
- 2007-06-15 CN CNU2007200232555U patent/CN201071374Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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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: 20080611 Termination date: 20120615 |