CN204265783U - Drill bit of taphole drilling machine of blast furnace - Google Patents
Drill bit of taphole drilling machine of blast furnace Download PDFInfo
- Publication number
- CN204265783U CN204265783U CN201420788343.4U CN201420788343U CN204265783U CN 204265783 U CN204265783 U CN 204265783U CN 201420788343 U CN201420788343 U CN 201420788343U CN 204265783 U CN204265783 U CN 204265783U
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- angle
- throat
- cutter head
- cutter
- drill bit
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Abstract
The utility model proposes a kind of drill bit of taphole drilling machine of blast furnace, comprise spiral cutter head, drill body and angle of throat, drill body comprises drilling rod connecting thread, relief groove, main ventilating pit, cutter head connecting thread, multiple cutter groove is equidistantly provided with around drill body upper end, junk slot is provided with between two cutter grooves, be provided with the side ventilating pit communicated with main ventilating pit in junk slot, cutter groove is downward-sloping from the inside to the outside forms angle with medullary ray; Circular knife crown end is coniform, and spiral cutter head engages with drill body via cutter head connecting thread; Angle of throat is welded in cutter groove, and cutting edge is higher than cutter groove, and angle of throat shape is that large outside, inner side is little; By this, in use, improve drill bit to the concentrated impact force in centre, stemming duct, and coordinating of the angle of inclination of angle of throat and junk slot and ventilating pit, be conducive to improving stock-removing efficiency, reduce the resistance that angle of throat operates.
Description
[technical field]
The utility model relates to a kind of drill bit, is especially for use in the drill bit that blast furnace iron notch taphole drilling machine drilling rod uses.
[background technology]
In China, blast furnace iron notch taphole drilling machine and the use of drill bit drilling rod matched are progressive and perfect gradually along with the development of Iron and Steel Production, due to operation under the high temperature conditions, drill bit very easily weares and teares and corrode, and therefore the consumption of opening machine bit and drilling rod is very huge.The simultaneously opening ability of drill bit, material is good and bad, whether design is rationally all related to tapping outlet speed, quality and drilling tool usage quantity.High-quality drill bit reasonable in design not only makes the process of tapping outlet simple and easy to do, reduce the labour intensity of workman, save drilling tool, and can smooth opening iron mouth on time, for safeguarding iron mouth pore passage, going out clean slag iron, ensureing that smooth operation of furnace longevity all has very important significance.
Drill bit loss failure reason common at present has: 1. wear and tear, unreasonable relevant with drill bit design, drill bit aperture efficiency is low, iron mouth of not opening for a long time, whole drilling tool temperature distortion under hot environment, or in iron mouth pore passage, skidding is stagnated until angle of throat wear out failure after being obstructed in certain position; 2. scaling loss, with misoperation and opening time long relevant; 3. drill bit alloy cloth tooth is unreasonable, and under the washing away of high temperature sludge cone drums mud, frame of the bit top erosion is serious, and alloy angle of throat drops; 4. drill bit chip removal weak effect, high temperature body refuse constantly brushes erosion drill bit in opening process, makes it abrade; 5., there is falling tooth phenomenon in other blade not prison welding in cutter groove in drilling process.
When drill bit causes loss too fast based on certain reason above-mentioned, following result will be produced: 1. iron mouth of not opening for a long time, opening ability, the opening later stage opens with regard to being difficult to brill as run into sintering iron-clad, can only by burning oxygen or using the operating method that bore bit discloses out by force instead, and these two kinds of operating method can cause comparatively havoc to iron mouth pore passage and mud drum, also blast furnace casting direct motion certainly will can be affected; 2. in an opening process, more bit change number of times is more, and opening time is long causes drilling rod temperature distortion in iron mouth pore passage, cause scrapping of drilling rod, so not only increase the labour intensity of stokehold workman, reduce the safety coefficient of stokehold work, tap a blast furnace blast furnace every day opening for several times, and it is also a comparatively considerable financial loss that the drilling tool statistics of consumption is got up.
[utility model content]
For solving the problem, the utility model provides a kind of drill bit of taphole drilling machine of blast furnace, comprise spiral cutter head, drill body and angle of throat, drill body comprises drilling rod hole, drilling rod connecting thread, relief groove, main ventilating pit, cutter head connecting thread, drilling rod connecting thread is arranged on around drilling rod hole, relief groove connects with drilling rod hole, 3 ~ 6 cutter grooves are equidistantly provided with around drill body upper end, junk slot is provided with between every two cutter grooves, the side ventilating pit communicated with main ventilating pit is provided with in junk slot, side number of air hole is consistent with cutter groove quantity, cutter groove is downward-sloping from the inside to the outside forms angle with medullary ray, frame of the bit is that two sections of stageds are cylindrical, and lower part diameter is less, and upper part diameter is comparatively large, and upper and lower two portions joining place is level and smooth radian.Circular knife crown end is coniform and protrudes from drill body, engages with drill body via cutter head connecting thread; Angle of throat is welded in cutter groove, and the cutting edge of angle of throat is higher than cutter groove, and angle of throat shape is that large outside, inner side is little.
Further, spiral cutter head and angle of throat are Wimet.
Further, spiral cutter head is the auger bit that spiral is screwed into band drift angle.
Further, circular knife crown angular region is 120 degree ~ 90 degree.
Further, cutter groove and centerlines are 89 degree ~ 60 degree.
The beneficial effects of the utility model are: because spiral cutter head is the auger bit with drift angle, therefore in opening process, spiral cutter head pierces stemming at first, improve the concentrated impact force to centre, stemming duct, and the material of spiral cutter head is special angle of throat material, the high temperature in iron mouth pore passage more can be stood than the ordinary steel material of drill body; Meanwhile, utilize the angle of throat being arranged on cutter groove around to carry out shear action, angle of throat, in from bottom to up to the angle that medullary ray is drawn close, is more conducive to improving stock-removing efficiency.Spiral cutter head has been provided with junk slot, matches with below junk slot and ventilating pit, is conducive to cutting fragment to be discharged, and reduces angle of throat resistance.
[accompanying drawing explanation]
Fig. 1 is sectional view of the present utility model.
Fig. 2 is front view of the present utility model.
Fig. 3 is vertical view of the present utility model.
Fig. 4 is the utility model other direction view.
[embodiment]
The utility model mainly discloses a kind of drill bit of taphole drilling machine of blast furnace, wherein to carry out the method for opening to blast furnace iron notch known by those skilled in the technology concerned, therefore with explanation hereinafter, no longer does complete description to drill bit using method.Meanwhile, with hereinafter contrasted graphic, mainly express the signal relevant with the utility model feature, also do not need the complete drafting of foundation physical size, formerly illustrate.
Please refer to Fig. 1-4, for the utility model provides a kind of drill bit of taphole drilling machine of blast furnace, comprise spiral cutter head 1, drill body 2 and angle of throat 3, drill body 2 comprises drilling rod hole 20, drilling rod connecting thread 21, relief groove 22, main ventilating pit 23, cutter head connecting thread 24, drilling rod connecting thread 21 is arranged on around drilling rod hole 20, drilling rod hole 20 connects with relief groove 22, and drilling rod connecting thread 21 is that internal thread is in order to connect with drilling rod (not shown).3 ~ 6 cutter grooves 25 are equidistantly provided with around drill body 2 upper end, junk slot 26 is provided with between two cutter grooves 25, the side ventilating pit 27 communicated with main ventilating pit 23 is provided with in junk slot 26, side ventilating pit 27 quantity is consistent with cutter groove 25 quantity, and cutter groove 25 is downward-sloping from the inside to the outside forms 89 degree ~ 60 degree angle theta with medullary ray; Spiral cutter head 1 top is coniform and protrudes from drill body 2, and for spiral is screwed into the auger bit of band drift angle, spiral cutter head 1 drift angle scope is 120 degree ~ 90 degree, engages with drill body 2 via cutter head connecting thread 24; Angle of throat 3 is welded in cutter groove 25, and the cutting edge of angle of throat 3 is higher than cutter groove 25, and angle of throat 3 shape is that large outside, inner side is little, and spiral cutter head 1 and angle of throat 3 adopt Wimet.
Under one enforcement state, cutter groove 25 is 70 degree with the angle theta of medullary ray, the quantity of cutter groove 25 and side ventilating pit 27 is 3, drill body 2 is two sections of stageds, lower part is diameter is the cylindrical of 46mm, upper part and lower part joining place are diameter is the cylindrical of 55mm, and two portions joining place is level and smooth radian.The angle theta of upper part and medullary ray is 70 °, junk slot 26 is had between two cutter grooves 25, the shape of up big and down small arc-shaped concave made by junk slot 26, the width of junk slot 26 the widest part is 29mm, the degree of depth that the mid point of junk slot 26 the widest part is inside is 12mm, side ventilating pit 27 is located on junk slot 26, and the diameter of side ventilating pit 27 is 8mm.Spiral cutter head 1 drift angle scope is 120 °, and top diameter is 20mm, and lower diameter is 14mm.The shape of angle of throat 3 is up big and down small pentagon, and angle of throat tangent plane base, top length is 10.3mm, and angle of throat tangent plane base, bottom length is 8mm, and top angle of throat tangent plane and angle of throat tangent plane base, bottom are 8mm to summit length, and side edge length is 5mm.
The utility model due to spiral cutter head be the auger bit with drift angle, therefore in opening process, spiral cutter head pierces stemming at first, improve the concentrated impact force to centre, stemming duct, and the material of spiral cutter head is special angle of throat material, the high temperature in iron mouth pore passage more can be stood than the ordinary steel material of drill body; Meanwhile, utilize the angle of throat being arranged on cutter groove around to carry out shear action, angle of throat, in from bottom to up to the angle that medullary ray is drawn close, is more conducive to improving stock-removing efficiency.Spiral cutter head has been provided with junk slot, matches with below junk slot and ventilating pit, is conducive to cutting fragment to be discharged, and reduces angle of throat resistance.
The foregoing is only the utility model preferably embodiment, and be not used to limit interest field of the present utility model; Simultaneously above description, for correlative technology field, special personage should understand and implement, and therefore other equivalences completed under not departing from the spirit that the utility model discloses change or modification, all should comprise in the claims.
Claims (5)
1. a drill bit of taphole drilling machine of blast furnace, comprise spiral cutter head, drill body and angle of throat, it is characterized in that: described drill body comprises drilling rod hole, drilling rod connecting thread, relief groove, main ventilating pit, cutter head connecting thread, described drilling rod connecting thread is arranged on around described drilling rod hole, described relief groove connects with described drilling rod hole, 3 ~ 6 cutter grooves are equidistantly provided with around described drill body upper end, junk slot is provided with between every two described cutter grooves, the side ventilating pit communicated with described main ventilating pit is provided with in described junk slot, described side number of air hole is consistent with described cutter groove quantity, described cutter groove is downward-sloping from the inside to the outside forms angle with medullary ray,
Described circular knife crown end is coniform and protrudes from described drill body, engages with described drill body via described cutter head connecting thread;
Described angle of throat is welded in described cutter groove, and the cutting edge of described angle of throat is higher than described cutter groove, and described angle of throat shape is that large outside, inner side is little.
2. drill bit of taphole drilling machine of blast furnace according to claim 1, is characterized in that: described spiral cutter head and described angle of throat are Wimet.
3. drill bit of taphole drilling machine of blast furnace according to claim 1, is characterized in that: described spiral cutter head is the auger bit that spiral is screwed into band drift angle.
4. drill bit of taphole drilling machine of blast furnace according to claim 3, is characterized in that: described circular knife crown angular region is 120 degree ~ 90 degree.
5. drill bit of taphole drilling machine of blast furnace according to claim 1, is characterized in that: the described angle of described cutter groove and medullary ray is 89 degree ~ 60 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420788343.4U CN204265783U (en) | 2014-12-11 | 2014-12-11 | Drill bit of taphole drilling machine of blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420788343.4U CN204265783U (en) | 2014-12-11 | 2014-12-11 | Drill bit of taphole drilling machine of blast furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204265783U true CN204265783U (en) | 2015-04-15 |
Family
ID=52800661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420788343.4U Expired - Fee Related CN204265783U (en) | 2014-12-11 | 2014-12-11 | Drill bit of taphole drilling machine of blast furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204265783U (en) |
-
2014
- 2014-12-11 CN CN201420788343.4U patent/CN204265783U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150415 Termination date: 20201211 |