CN214221093U - Rock drilling cross opening bore bit - Google Patents
Rock drilling cross opening bore bit Download PDFInfo
- Publication number
- CN214221093U CN214221093U CN202022583793.8U CN202022583793U CN214221093U CN 214221093 U CN214221093 U CN 214221093U CN 202022583793 U CN202022583793 U CN 202022583793U CN 214221093 U CN214221093 U CN 214221093U
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- bore bit
- cross
- bit
- rock drilling
- hard alloy
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Abstract
The utility model relates to a cross opening bore bit of rock drilling, this bore bit is including the carbide piece and the borer body that link together. The head of the drill body is provided with a cross arc-shaped open slot, and the hard alloy block which is in a semi-circular head strip shape is embedded in the open slot. The utility model discloses simple structure, with low costs, easily processing can prevent effectively that bore bit carbide from droing too early, improves the life of bore bit.
Description
Technical Field
The utility model relates to a rock drilling bore bit field of making especially relates to a cross opening bore bit of drilling.
Background
The drill bit is mainly applied to mining of mine engineering, petroleum exploitation, national defense engineering and other industries needing rock drilling and tunneling, is a main part of mine rock drilling equipment, and is also a part easy to damage and consume. The part is mainly responsible for breaking rock while drilling, and the head in contact with the rock is usually made of cemented carbide into a button or insert. In addition, the iron opening of domestic and foreign metallurgical blast furnaces is also mostly drilled by drill bits for iron placing operation, and most common rock drilling drill bits are in a straight shape and a cross shape of an insert type.
Because the cross-shaped drill bit has more hard alloy sheets welded than the straight drill bit, the drilling speed can be effectively improved during drilling, and the drill bit has the advantages of high drilling efficiency, long service life, low power consumption, low cost and the like. However, the grooving surfaces of the existing cross-shaped drill bit are all through cross grooves, compressed air is mostly used as a power source in the drilling process, the drill bit vibrates frequently due to uneven hardness of a drilled object, four independent bulges can be formed on the head of the drill bit after the drill bit is processed into the through cross grooves, and the root parts of the bulges are easy to cause fatigue stress cracking and fatigue stress breaking under the working environment of frequent vibration. In addition, after the slotting surface of the cross-shaped drill bit is processed into a through cross groove, four pieces of approximately cuboid hard alloy are brazed in the cross groove at present, and only two side surfaces of each piece of hard alloy are brazed with the slotting surface of the drill bit. Under the working condition of long-time vibration, the shearing force generated along the slotting direction is completely borne by the welding surface, and the hard alloy is easy to fall off.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a cross opening bore bit of rock drilling that improves performance and life-span is provided.
In order to solve the problem, the utility model relates to a cross opening bore bit of drilling, its characterized in that: the drill bit comprises a hard alloy block and a drill body which are connected together; the head of the drill body is provided with a cross arc-shaped open slot, and the hard alloy block which is in a semi-circular head strip shape is embedded in the open slot.
The hard alloy block and the brazing body are welded together through brazing.
The hard alloy block is 5mm in thickness, 2.5mm in arc radius, 11mm in height and 25mm in length.
The width of open slot is 7mm, the degree of depth is 8~12mm, the arc radius is 3.5mm, length is 25 mm.
Compared with the prior art, the utility model has the following advantage:
1. the utility model discloses the head of well borer body is equipped with cross arc open slot for borer body opening position adopts the cambered surface contact with the carbide contact surface, thereby has increased borer body opening position to the parcel face of carbide, and then can prevent effectively that the bore bit carbide from droing too early, improves the life of bore bit.
2. It is right to the utility model discloses carry out the chisel hole experiment, can discover that the cross opening borer body that has the arc wall has better parcel effect to the carbide piece, can effectively prevent bore bit carbide piece obscission to effectively prevent the appearance of bore bit borer groove central stress concentration phenomenon.
[ experiment 1 ] choose respectively 20 qualified with the material of quality the utility model discloses cross opening bore bit of drilling and traditional cross bore bit all adopt the same model bore bit to carry out with material type hillock chisel hole experiment, experimental time 1 month. Wherein the utility model discloses alloy groove width 7mm, degree of depth 12mm, bore bit of bore bit tail footpath 22 mm's bore bit. After the experiment, 5 hard alloy pieces drop phenomenon appear in traditional bore bit, the utility model discloses cross bore bit only appears 1 hard alloy piece drop phenomenon.
[ experiment 2 ] choose respectively 20 qualified with the material of quality the utility model discloses cross opening bore bit of drilling and traditional cross bore bit all adopt the same model bore bit to carry out with material type hillock chisel hole experiment, experimental time 2 months. Wherein the utility model discloses alloy groove width 7mm, degree of depth 12mm, bore bit of bore bit tail footpath 22 mm's bore bit. The experiment is ended, and 2 examples bore bit borer groove central part fracture phenomena appear in traditional bore bit, the utility model discloses cross bore bit does not appear borer groove central part fracture phenomenon.
3. The utility model discloses simple structure, with low costs, easily processing.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a cross-sectional view of the present invention.
Fig. 3 is a front view of the present invention.
Fig. 4 is a top view of the present invention.
In the figure: 1-hard alloy block, 2-brazing body.
Detailed Description
As shown in fig. 1-4, the rock drilling cross-shaped opening drill bit comprises a hard alloy block 1 and a drill body 2 which are connected together. The head of the drill body 2 is provided with a cross arc-shaped open slot, and a hard alloy block 1 in a semi-circular head strip shape is embedded in the open slot.
Wherein: the hard alloy block 1 and the brazing body 2 are welded together by brazing.
The hard alloy block 1 has a thickness of 5mm, an arc radius of 2.5mm, a height of 11mm and a length of 25 mm.
The width of the open slot is 7mm, the depth is 8-12 mm, the arc radius is 3.5mm, and the length is 25 mm.
The tail diameter of the drill bit is consistent with that of a traditional cross-shaped drill bit, and is R32mm or T32.
The utility model discloses the same with traditional cross bore bit using-way during the use, connect through the drill rod, need not change the connected mode of drill rod and drill bit, can operate.
Claims (4)
1. The utility model provides a cross opening bore bit of rock drilling which characterized in that: the drill bit comprises a hard alloy block (1) and a drill body (2) which are connected together; the head of the drill body (2) is provided with a cross arc-shaped open slot, and the hard alloy block (1) in a semi-circular head strip shape is embedded in the open slot.
2. A rock drilling cross-type opening bit as defined in claim 1 wherein: the hard alloy block (1) and the brazing body (2) are welded together through brazing.
3. A rock drilling cross-type opening bit as defined in claim 1 wherein: the hard alloy block (1) is 5mm thick, 2.5mm in arc radius, 11mm in height and 25mm in length.
4. A rock drilling cross-type opening bit as defined in claim 1 wherein: the width of open slot is 7mm, the degree of depth is 8~12mm, the arc radius is 3.5mm, length is 25 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022583793.8U CN214221093U (en) | 2020-11-10 | 2020-11-10 | Rock drilling cross opening bore bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022583793.8U CN214221093U (en) | 2020-11-10 | 2020-11-10 | Rock drilling cross opening bore bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214221093U true CN214221093U (en) | 2021-09-17 |
Family
ID=77696824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022583793.8U Active CN214221093U (en) | 2020-11-10 | 2020-11-10 | Rock drilling cross opening bore bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214221093U (en) |
-
2020
- 2020-11-10 CN CN202022583793.8U patent/CN214221093U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |