CN220050158U - Large-diameter machine clamp type drill bit - Google Patents
Large-diameter machine clamp type drill bit Download PDFInfo
- Publication number
- CN220050158U CN220050158U CN202321474514.1U CN202321474514U CN220050158U CN 220050158 U CN220050158 U CN 220050158U CN 202321474514 U CN202321474514 U CN 202321474514U CN 220050158 U CN220050158 U CN 220050158U
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- drill
- cutter body
- cutter
- drill bit
- chip removal
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- 238000005553 drilling Methods 0.000 claims abstract description 18
- 230000036346 tooth eruption Effects 0.000 claims abstract description 15
- 230000002093 peripheral effect Effects 0.000 claims description 12
- 230000007704 transition Effects 0.000 claims description 5
- 239000003245 coal Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Drilling Tools (AREA)
Abstract
The utility model discloses a large-diameter mechanical clamping type drill bit which comprises a cutter body, a center drill, a cutter holder and a drill bit connecting rod, wherein a mounting through hole is formed in the core of the cutter body; the cutter body comprises two cutting teeth which are rotationally symmetrical around the center drill; a group of detachable tool holders are arranged on the cutting surface of each cutting tooth, the tool holders are provided with blades, and the blades axially protrude out of the end surfaces of the cutting teeth; the utility model adopts the replaceable drilling blade, has high positioning precision, and is suitable for one-step forming operation of large-diameter holes.
Description
Technical Field
The utility model belongs to the technical field of machining tools, and particularly relates to a large-diameter mechanical clamping type drill bit.
Background
In the process of coal mine drilling or petroleum exploitation, the drill bit is a main tool for breaking rock and hard soil layers, the well hole is formed by breaking the rock by the drill bit, the well hole is formed well or not, the time is long and short, the time is related to the characteristics of the rock of the stratum to be drilled and the performance of the drill bit, and the matching degree between the drill bit and the stratum is also related to the reasonable selection of the drill bit, so that the reasonable selection of the drill bit plays an important role in improving the drilling speed and reducing the comprehensive drilling cost. The existing coal mine drill bit is generally an integrally formed diamond drill bit, the existing coal mine drill bit is provided with two symmetrical wings, the two wings are used as cutting teeth to tunnel a coal mine soil layer, the durability of the drill bit is low, the drill bit must be replaced once the cutting teeth are worn, the accuracy is poor due to the lack of centering parts, particularly, the drill bit is easy to deviate in the drilling process of large-diameter holes, the drilling position can only be readjusted to carry out re-operation, and the flatness of the whole operation surface is also influenced.
Disclosure of Invention
In order to solve the problems and the technical requirements, the utility model provides a large-diameter mechanical clamping drill bit, which adopts a replaceable drilling blade, has high positioning precision and is suitable for one-step forming operation of a large-diameter hole.
The technical scheme of the utility model is as follows: the large-diameter machine clamp type drill bit comprises a cutter body, a center drill, a cutter holder and a drill bit connecting rod, wherein an installation through hole is formed in the core of the cutter body, the tail end of the cutter body is fixedly connected with the drill bit connecting rod, the center drill is embedded into the installation through hole from the front end, the center drill is fixedly connected with the cutter body, and the front end of the center drill protrudes out of the front end face of the cutter body; the cutter body comprises two cutting teeth which are rotationally symmetrical around the center drill; a group of detachable tool holders are arranged on the cutting surface of each cutting tooth, and the tool holders are provided with blades which axially protrude out of the end surfaces of the cutting teeth.
Further, the drilling part of the central drill extends out of the front end face of the cutter body completely, the vertex angle of the central drill is 118 degrees, the central drill comprises two main cutting edges and two chip removal grooves, the chip removal grooves extend from the drill point of the central drill to the peripheral surface, and the inclination angle of the chip removal grooves relative to the axial direction of the central drill is not more than 30 degrees.
Further, two cutter body chip removal grooves are formed in the peripheral surface of the cutter body, the cutter body chip removal grooves are arranged between the two cutting teeth, the inclination direction of each cutter body chip removal groove is consistent with that of the chip removal groove on the central drill, and chip removal grooves of the central drill can be directly discharged into the cutter body chip removal grooves.
Further, the tool holder is arranged on the front tool face of the cutting tooth, two blade grooves are formed in the tool holder, one blade is arranged in each blade groove, the axial positions of the two blades are consistent, and the circumferential positions and the radial positions of the two blades are staggered.
Further, the end edge of the blade protrudes out of the front end face of the blade body, the end edge of the blade is in an obtuse angle shape, the obtuse angle range is 160-165 degrees, and a transition round chamfer is arranged at the tip of the obtuse angle.
Further, the tool holder is connected with the tool body through a fastening screw, and the fastening screw penetrates through the cutting tooth from the back surface of the cutting tooth to fix the tool holder.
Further, a clamping plane is arranged on the peripheral surface of the cutter body, two screw holes are axially formed in the clamping plane, the screw holes penetrate through the core part and the peripheral surface of the cutter body, and the screws penetrate through the screw holes to fix the center drill.
The utility model has the beneficial effects that: 1) The drill bit is provided with the center drill, the drilling part of the center drill protrudes out of the end face of the cutter body, the centering function is realized during drilling, the drilling process is not easy to deviate, the positioning effect is good, and the center drill and the end face blade are matched with the drilling mode, so that the processing of a large hole is facilitated; 2) The chip removing groove of the cutter body is used for receiving the chip removing groove of the central drill, and chips of the central drill can be directly discharged into the chip removing groove of the cutter body during drilling, so that the chip removing is smooth, and the performance is stable; 3) The center drill and the tool holder are designed in a detachable way, so that when the blade or the drill point part is damaged, the center drill and the tool holder can be replaced in time, and the service life of the cutter body is prolonged; when the holes with different depths are processed, the drilling requirements can be met only by replacing drill bit connecting rods with different lengths, and the application range of the drill bit is wider.
Drawings
FIG. 1 is a perspective view of a first embodiment of a drill bit of the present utility model;
FIG. 2 is a second perspective view of the drill bit of the present utility model;
FIG. 3 is a schematic diagram of the end face of a drill bit of the present utility model;
FIG. 4 is an end face configuration view of the core drill;
FIG. 5 is an axial block diagram of a drill bit of the present utility model;
FIG. 6 is a cross-sectional view taken at A-A of FIG. 5;
marked in the figure as: the tool comprises a tool body 1, cutting teeth 11, a mounting through hole 12, a tool body chip groove 13, a clamping plane 14, a screw hole 141, a tool holder 2, a tool insert groove 21, a transition round chamfer 211, a tool insert 22, a fastening screw 23, a center drill 3, a main cutting edge 31, a chip groove 32 and a drill connecting rod 4.
Detailed Description
The utility model is further described below with reference to the drawings and examples.
The large-diameter machine clamp type drill bit comprises a cutter body 1, a center drill 3, a cutter holder 2 and a drill bit connecting rod 4, wherein a mounting through hole 12 is formed in the core of the cutter body 1, the tail end of the cutter body 1 is fixedly connected with the drill bit connecting rod 4, the center drill 3 is embedded into the mounting through hole 12 from the front end, the center drill 3 is fixedly connected with the cutter body 1, and the front end of the center drill 3 protrudes out of the front end face of the cutter body 1; specifically, a clamping plane 14 is arranged on the peripheral surface of the cutter body 1, two screw holes 141 are axially formed in the clamping plane 14, the screw holes 141 penetrate through the core part and the peripheral surface of the cutter body 1, and screws penetrate through the screw holes 141 to fix the center drill 3.
The drilling part of the central drill 3 extends out of the front end face of the cutter body 1 completely, the vertex angle of the central drill 3 is 118 degrees, the central drill 3 comprises two main cutting edges 31 and two chip discharging grooves 32, the chip discharging grooves 32 extend from the drill point of the central drill 3 to the peripheral face, and the inclination angle of the chip discharging grooves 32 relative to the axial direction of the central drill 3 is not more than 30 degrees.
The cutter body 1 comprises two cutting teeth 11, and the two cutting teeth 11 are rotationally symmetrical around the center drill 3; a group of detachable tool holders 2 are arranged on the cutting surface of each cutting tooth 11, the tool holders 2 are provided with blades 22, and the blades 22 axially protrude from the end surfaces of the cutting teeth 11; specifically, the tool holder 2 is mounted on the rake face of the cutting tooth 11, and two insert grooves 21 are provided on the tool holder 2, one insert 22 is mounted in each insert groove 21, and the axial positions of the two inserts 22 are identical, but the circumferential and radial positions are offset from each other. The holder 2 and the tool body 1 are connected by a fastening screw 23, and the fastening screw 23 passes through the cutting tooth 11 from the back surface of the cutting tooth 11 to fix the holder 2.
Two cutter body chip grooves 13 are formed in the peripheral surface of the cutter body 1, the cutter body chip grooves 13 and the two cutting teeth 11 are arranged at intervals, the inclination direction of the cutter body chip grooves 13 is consistent with that of the chip grooves 32 on the center drill 3, and chips in the chip grooves 32 of the center drill 3 can be directly discharged into the cutter body chip grooves 13.
The end edge of the blade 22 protrudes out of the front end face of the blade body 1, the end edge of the blade 22 is in a blunt angle shape, the obtuse angle range is 160-165 degrees, and a transition round chamfer 211 is arranged at the tip of the obtuse angle.
The drilling process of the utility model comprises the following steps: according to the depth of the hole, the corresponding drill connecting rod 4 is selected for clamping, after the central drill 3 is positioned, the drill bit is firstly drilled forwards, chips are discharged into the cutter body chip groove 13 from the chip groove 32 of the central drill, the hole diameter is further enlarged by four blades 22 which are staggered with each other along the circumferential direction and the radial direction on the end face, the end edges of the blades 22 start to drill from the transition round chamfer 211, the obtuse round chamfer can protect the edge part, the cutter is prevented from being broken suddenly under stress, and the chips of the blades 22 are discharged outwards along with the cutter body chip groove 13 along with the deep drilling of the end face.
While the utility model has been described with respect to several preferred embodiments, the scope of the utility model is not limited thereto, and any changes and substitutions that would be apparent to one skilled in the art within the scope of the utility model are intended to be included within the scope of the utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.
Claims (7)
1. A large diameter machine presss from both sides formula drill bit, its characterized in that: the cutter comprises a cutter body, a central drill, a cutter holder and a drill connecting rod, wherein a mounting through hole is formed in the core of the cutter body, the tail end of the cutter body is fixedly connected with the drill connecting rod, the central drill is embedded into the mounting through hole from the front end, the central drill is fixedly connected with the cutter body, and the front end of the central drill protrudes out of the front end face of the cutter body; the cutter body comprises two cutting teeth which are rotationally symmetrical around the center drill; a group of detachable tool holders are arranged on the cutting surface of each cutting tooth, and the tool holders are provided with blades which axially protrude out of the end surfaces of the cutting teeth.
2. The large diameter machine-clamped drill bit of claim 1, wherein: the drilling part of the central drill extends out of the front end face of the cutter body completely, the vertex angle of the central drill is 118 degrees, the central drill comprises two main cutting edges and two chip removal grooves, the chip removal grooves extend from the drill point of the central drill to the peripheral surface, and the inclination angle of the chip removal grooves relative to the axial direction of the central drill is not more than 30 degrees.
3. A large diameter machine-clamped drill bit according to claim 2, wherein: the peripheral surface of the cutter body is provided with two cutter body chip removal grooves, the cutter body chip removal grooves are arranged between the two cutting teeth, the inclination direction of the cutter body chip removal grooves is consistent with that of the chip removal grooves on the central drill, and chip removal grooves of the central drill can be directly discharged into the cutter body chip removal grooves.
4. A large diameter machine-clamped drill bit according to claim 3, wherein: the cutter holder is arranged on the front cutter surface of the cutting tooth, two cutter blade grooves are formed in the cutter holder, one cutter blade is arranged in each cutter blade groove, the axial positions of the two cutter blades are consistent, and the circumferential positions and the radial positions of the two cutter blades are staggered.
5. The large diameter machine-clamped drill bit of claim 4, wherein: the end edge of the blade protrudes out of the front end face of the blade body, the end edge of the blade is in an obtuse angle shape, the obtuse angle range is 160-165 degrees, and a transition round chamfer is arranged at the tip of the obtuse angle.
6. The large diameter machine-clamped drill bit of claim 5, wherein: the tool holder is connected with the tool body through a fastening screw, and the fastening screw penetrates through the cutting tooth from the back surface of the cutting tooth to fix the tool holder.
7. The large diameter machine-clamped drill bit of claim 6, wherein: the cutter body is characterized in that a clamping plane is arranged on the peripheral surface of the cutter body, two screw holes are axially formed in the clamping plane, the screw holes penetrate through the core part and the peripheral surface of the cutter body, and the screws penetrate through the screw holes to fix the center drill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321474514.1U CN220050158U (en) | 2023-06-09 | 2023-06-09 | Large-diameter machine clamp type drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321474514.1U CN220050158U (en) | 2023-06-09 | 2023-06-09 | Large-diameter machine clamp type drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220050158U true CN220050158U (en) | 2023-11-21 |
Family
ID=88764337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321474514.1U Active CN220050158U (en) | 2023-06-09 | 2023-06-09 | Large-diameter machine clamp type drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220050158U (en) |
-
2023
- 2023-06-09 CN CN202321474514.1U patent/CN220050158U/en active Active
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| GR01 | Patent grant |