CN113027332B - Cluster type drilling device and hole processing method - Google Patents
Cluster type drilling device and hole processing method Download PDFInfo
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- CN113027332B CN113027332B CN202110352810.3A CN202110352810A CN113027332B CN 113027332 B CN113027332 B CN 113027332B CN 202110352810 A CN202110352810 A CN 202110352810A CN 113027332 B CN113027332 B CN 113027332B
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- 238000005553 drilling Methods 0.000 title claims abstract description 55
- 238000003672 processing method Methods 0.000 title claims abstract description 9
- 238000003801 milling Methods 0.000 claims abstract description 87
- 230000005540 biological transmission Effects 0.000 claims abstract description 25
- 238000003754 machining Methods 0.000 claims description 15
- 239000002826 coolant Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 9
- 230000017525 heat dissipation Effects 0.000 abstract description 7
- 239000011435 rock Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/08—Roller bits
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/006—Mechanical motion converting means, e.g. reduction gearings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Drilling And Boring (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
The invention discloses a cluster drilling machine, which comprises a variable speed transmission system and a cluster cutter group driven by the variable speed transmission system, wherein the cluster cutter group comprises a central drill for drilling a central hole and milling cutters arranged on the outer circumference of the central drill, and the milling cutters can revolve around the axis of the central drill and simultaneously rotate to mill the inner wall of the central hole. A hole processing method adopts the cluster drill for processing. The invention has the advantages that the large holes can be processed at one time; the motor torque is small when the hole wall is milled; the processing of the spiral groove on the hole wall can be realized; the drill bit has the advantage of good heat dissipation effect.
Description
Technical Field
The invention relates to a drilling device for a soil layer or a rock layer and a hole processing method, in particular to a cluster type drilling device and a hole processing method.
Background
The existing mining drilling technology is that a drill bit rotates around a drilling center and is pushed along the axial direction of a hole, so that circumferential cutting and axial cutting are realized, and the hole is machined. The drill rod is driven by external power, as shown in fig. 1, the drill rod 01 rotates under the action of external power, the drill bit 02 rotates under the drive of the drill rod, and the drill rod 01 drives the drill bit 02 to rotate around the center of a hole to realize drilling and cutting, so that drilling is realized. The other is to use a hole bottom motor 03 in the hole, as shown in fig. 2, the drill rod 01 does not rotate in the hole, a high-pressure medium is arranged in the hole of the drill rod, the high-pressure medium acts on the hole bottom motor 03, the hole bottom motor 03 rotates to drive the drill bit 02 to rotate, and the drilling of the hole is realized; and meanwhile, the drill rod 01 is axially pushed to finish drilling construction. The existing cluster drill is mainly integrated by blades or externally arranged with multiple power, and has great difficulty in deep hole and directional construction. The main disadvantages are: (1) The single drilling capability is small, when a large-diameter drilling hole is processed, the large-diameter drilling hole can be completed only by multiple reaming, and the efficiency is low; (2) the torque required by drilling is large; (3) the drill bit continuously cuts, the heat dissipation effect is poor, and the service life is short; (4) The hole type processing is single, and only a simple cylindrical hole can be processed.
Accordingly, there is a need for a cluster drill and method of use thereof that addresses the above-described problems.
Disclosure of Invention
In view of the above, the present invention aims to overcome the defects in the prior art, and provide a cluster drill and a method for using the same, which can realize (1) one-time processing of a large hole; (2) the motor torque is small when hole wall milling is carried out; (3) the heat dissipation effect of the drill bit is good; (4) holes with spiral grooves on the walls of the holes can be processed.
The cluster drill comprises a variable speed transmission system and a cluster cutter group driven by the variable speed transmission system, wherein the cluster cutter group comprises a central drill for drilling a central hole and milling cutters arranged on the outer circumference of the central drill, and the milling cutters can revolve around the axis of the central drill and simultaneously rotate to mill the inner wall of the central hole.
(1) The center hole is drilled firstly by the center drill, then the hole wall of the center hole is cut by the milling cutter, the center hole can be reamed, the center hole and the reaming are carried out simultaneously, and the one-time processing of the large hole can be completed. (2) When the axial feeding speed of the center drill and the milling cutter is low, a cylindrical hole can be machined; when the axial feeding speed of the center drill and the milling cutter is higher, a special-shaped hole with a threaded groove on the hole wall can be processed, and the special-shaped hole can improve the traditional rock anchoring effect. (3) According to the invention, the rotating speed of the milling cutter can be increased through the variable speed transmission system, so that the output speed of the motor during drilling is reduced, and the torque is reduced. (4) When a central hole is machined, the rotating speed of the drilling tool is low, and the generated heat is less; when the hole wall is cut, the milling cutter is intermittent cutting (intermittent cutting means that when the hole wall is cut, the milling cutter always keeps only part of the cutter head to be contacted with the hole wall and cuts the hole wall), the heat dissipation effect of the milling cutter is good, and the service life of the milling cutter can be prolonged.
Further, the variable speed drive system comprises a sun gear, a planet gear and a planet carrier; the sun gear is a fixed wheel, and the center drill is in transmission connection with the planet carrier and is driven to rotate by the planet carrier; the milling cutter is arranged on the planet carrier, the planet carrier drives the milling cutter to revolve around the axis of the center drill, and the planet wheel drives the planet wheel to rotate. The milling cutter is driven by the planet wheel, and the milling cutter can revolve around the axis of the central drill while rotating. Under the condition that the rotating speed of the milling cutter is unchanged, the output speed of the motor during drilling can be reduced, and the torque can be reduced.
Further, the planet wheel is provided with a first power output shaft, the first power output shaft is arranged on the planet carrier in a rotating fit mode, and the milling cutter is arranged on the first power output shaft in a transmission fit mode.
Furthermore, the speed increasing wheel is matched between the milling cutter and the planet wheel in a transmission way, and the rotating speed of the milling cutter can be further increased according to the requirement under the condition that the input rotating speed of the motor is unchanged.
Further, the top end of the center drill is higher than the top end of the milling cutter, the machining radius of the center drill is partially overlapped with that of the milling cutter, and distribution and installation of the center drill and the milling cutter are easy.
Further, the side edges of the milling cutter protrude out of the side edges of the planet carrier, i.e. the variable speed transmission system is located in the machining area of the milling cutter, so as to prevent the planet carrier from abutting against the machined hole wall when rotating.
Further, a space for accommodating the sun gear and the planet gears is formed inside the planet carrier.
Further, the planet carrier comprises a planet wheel seat and a connecting end cover, a supporting piece is arranged on the end face of one side of the planet wheel seat, which faces the connecting end cover, and the supporting piece is connected with the periphery of the connecting end cover along the axial direction.
Further, the sun gear is provided with a cooling medium channel for cooling the central drilling medium to pass through along the axial direction, so that the temperature of the central drilling can be reduced during working.
A processing method of a hole, using the cluster drill, comprises the following processing steps:
(1) Connecting the cluster drill to the drilling equipment;
(2) The center of the stator is input with a pressure medium to enable the rotor to rotate, the rotor drives the sun wheel and the planet wheel to rotate, and the planet wheel revolves around the sun wheel while rotating;
(3) The drilling equipment is axially pushed, the center drill firstly contacts the processing material and starts to drill a center hole on the processing material;
(4) As the drilling equipment advances, the milling cutter contacts the machining substance and begins milling the hole wall;
(5) The drilling equipment continues to advance, the center drill completes the drilling of the center hole, and the milling cutter completes the milling of the hole wall.
Aiming at the problems existing in the existing drilling, the cluster type drilling machine provided by the invention realizes the rotation of the milling cutter and simultaneously completes the revolution around the center of the hole. Under the action of axial thrust of drilling equipment, milling type drilling of a hole wall is realized, and the milling type drilling device has the characteristics of one-time processing of large-aperture, high efficiency, long service life of a cutter and processing of a special-shaped spiral hole, and can be widely applied to underground coal mines and rock pile foundation engineering construction.
The beneficial effects of the invention are as follows: (1) The processing of the large holes can be realized with small torque, and the processing of the large holes can be completed at one time; (2) the milling cutter intermittently cuts, so that the heat dissipation effect is good and the service life is long; (3) The machining of the spiral groove of the hole wall can be finished by adopting a single milling cutter, so that the traditional rock anchoring effect is improved. (4) Because the milling cutter has small diameter, high-rotation-speed cutting can be realized.
Drawings
The invention is further described below with reference to the accompanying drawings and examples:
FIG. 1 is a schematic diagram of an out-of-bore power driven drill pipe in accordance with the background of the invention;
FIG. 2 is a schematic diagram of a motor driven drill bit utilizing a hole bottom in a hole in accordance with the background of the invention;
FIG. 3 is a schematic view of a cluster type drill;
FIG. 4 is a cross-sectional view of a cluster drilling tool of the present invention;
FIG. 5 is a schematic view of the power unit of the cluster tool of the present invention;
FIG. 6 is a semi-sectional view of a sun gear in the cluster tool of the present invention;
FIG. 7 is a schematic illustration of a variable speed drive system in a cluster tool of the present invention;
FIG. 8 is a schematic view of a shaped hole formed by the cluster tool of the present invention.
In the figure, 1 is a power device, 1-1 is a stator, 1-11 is a first latch, 1-2 is a rotor, 1-3 is a bracket connecting piece,
2 is a variable-speed transmission system,
2-1 is a planet carrier, 2-11 is a star wheel support, 2-12 is a connecting end cover, 2-121 is a guide boss, 2-122 is a cooling channel sealing groove, 2-123 is an assembly hole, 2-13 is a supporting piece,
2-2 is sun gear, 2-21 is input shaft, 2-22 is guiding counter bore, 2-24 is second latch, 2-26 is cooling medium channel,
2-3 of planetary gears, 2-31 of first power output shafts, 2-4 of speed-increasing gears, 2-5 of driving wheels,
3 is a center drill, and 4 is a milling cutter.
Detailed Description
The invention will be further described with reference to the accompanying drawings 3 to 8 and examples, it being noted that the terms "first", "second", etc. are used for descriptive purposes only and not to indicate or imply that the apparatus or element being referred to must be in a particular orientation, be constructed or operated in a particular manner for purposes of describing the invention and simplifying the description, and therefore should not be construed as limiting, indicating or implying any relative importance to the invention.
The cluster drill in the embodiment comprises a power device 1, a variable speed transmission system 2 and a cluster cutter set driven by the variable speed transmission system 2. The power device 1 consists of a stator 1-1 and a rotor 1-2 sleeved outside the stator 1-1 and coaxial with the stator 1-1, wherein the rotor 1-2 is in running fit with the stator 1-1. As shown in fig. 5, the left end of the stator 1-1 is provided with a pressure medium inlet, and the side wall of the stator 1-1 is provided with a pressure medium outlet; the inner wall of the rotor 1-2 is provided with a pressure medium spiral channel communicated with a pressure medium outlet. The cluster tool group comprises a central drill 3 for drilling a central hole and a milling cutter 4 arranged on the outer circumference of the central drill 3, wherein the milling cutter 4 can revolve around the axis of the central drill 3 and simultaneously rotate for milling the inner wall of the central hole. When in use, the milling cutter 4 is used for intermittent cutting, so that the heat dissipation effect is good and the service life is long.
In this embodiment, the variable speed transmission system 2 includes a sun gear 2-2, a planet gear 2-3, and a planet carrier 2-1; the sun gear 2-2 is a fixed gear, and the center drill 3 is in transmission connection with the planet carrier 2-1 and is driven to rotate by the planet carrier 2-1. The milling cutter 4 is arranged on the planet carrier 2-1, and is driven by the planet carrier 2-1 to revolve around the axis of the center drill 3 and is simultaneously driven by the planet wheels 2-3 to rotate. The rotor 1-2 is connected to the planet carrier 2-1 by means of a carrier connection 1-3. The milling cutter 4 revolves around the axis of the center drill 3 while rotating, and the output speed of the motor during drilling can be reduced to reduce torque under the condition that the rotation speed of the milling cutter 4 is unchanged.
In this embodiment, the planetary gear 2-3 is provided with a first power output shaft 2-31, the first power output shaft 2-31 is rotatably matched with the planetary gear carrier 2-1, and the milling cutter 4 is in transmission matching with the first power output shaft 2-31.
In this embodiment, a speed increasing wheel 2-4 is further in transmission fit between the milling cutter 4 and the planetary wheel 2-3, and the rotation speed of the milling cutter 4 can be further increased according to the requirement under the condition that the input rotation speed of the motor is unchanged. If one speed increasing wheel 2-4 is arranged, the speed increasing wheel 2-4 can be arranged on the planet carrier 2-1 in a rotating fit way through a second power output shaft, and the milling cutter 4 is driven through the second power output shaft. The speed increasing wheel 2-4 can be directly meshed with the planet wheel 2-3 for transmission; the driving wheel 2-5 can also be arranged on the first power output shaft 2-31, so that the driving wheel 2-5 is meshed with the speed increasing wheel 2-4 for driving. If the speed increasing wheels 2-4 are provided with a plurality of speed increasing wheels and are arranged on the planet carrier 2-1 in a rotating fit manner through a plurality of power output shafts, the finally output power output shafts drive the milling cutter 4.
In this embodiment, the top end of the center drill 3 is higher than the top end of the milling cutter 4, and the machining radius of the center drill 3 partially overlaps with the machining radius of the milling cutter 4, so that the distribution and installation of the center drill 3 and the milling cutter 4 are easy. Preferably, the milling cutter 4 has a diameter greater than the diameter of the centre drill 3.
In this embodiment, the side edge of the milling cutter 4 protrudes from the side edge of the planet carrier 2-1, that is, the variable speed transmission system 2 is located in the machining area of the milling cutter 4, so as to prevent the planet carrier 2-1 from abutting against the machined hole wall when rotating.
In this embodiment, a space for accommodating the sun gear 2-2 and the planet gears 2-3 is provided inside the planet carrier 2-1.
In this embodiment, the planet carrier 2-1 includes a planet wheel 2-3 seat 2-11 and a connection end cover 2-12, a support member 2-13 is disposed on an end surface of one side of the planet wheel 2-3 seat 2-11 facing the connection end cover 2-12, and the support member 2-13 is abutted to a peripheral side of the connection end cover 2-12 along an axial direction. The planet wheel 2-3 seat 2-11 and the supporting piece 2-13 are of an integrated structure, and bolts penetrate through the connecting end cover 2-12 to be connected with the supporting piece 2-13 in a threaded mode.
The sun gear 2-2 and the planet gear 2-3 are both positioned between the planet gear 2-3 seat 2-11 and the connecting end cover 2-12. The middle part of the connecting end cover 2-12 is integrally provided with a first guide boss 2-121, and the first guide boss 2-121 is positioned on the inner side end surface of the connecting end cover 2-12 (the inner side end surface of the connecting end cover 2-12 refers to the end surface facing the row constellation side). The circumference side of the first guide boss 2-121 is provided with a first cooling channel seal groove 2-122, the center of the outer end face of the connecting end cover 2-12 is provided with an assembly hole 2-123, and the center drill 3 is arranged in the assembly hole 2-123.
The sun gear 2-2 is in transmission fit with the input shaft 2-21, and preferably, the sun gear 2-2 is positioned at the first end of the input shaft 2-21 and is integrally arranged with the input shaft 2-21; the second end of the input shaft 2-21 is provided with a latch and a second guide boss 2-121 in sequence. A coaxial guiding counter bore 2-22 is arranged on one end face of the sun gear 2-2, which faces the connecting end cover 2-12, and the guiding counter bore 2-22 is in rotary fit with the first guiding boss 2-121. As shown in fig. 4, 5 and 6, the second end of the input shaft 2-21 passes through the planet wheel 2-3 seat 2-11, and after the second guide boss 2-121 is inserted into the stator 1-1, the second latch 2-24 is engaged with the first latch 1-11 at the end of the stator 1-1.
In this embodiment, the sun gear 2-2 is provided with cooling medium passages 2-26 in the axial direction for cooling the medium of the core drill 3. The assembly holes 2-123 on the connecting end cover 2-12 penetrate through the first guide boss 2-121, and when in use, the assembly holes 2-123 are communicated with the cooling medium channels 2-26, so that the cooling medium reduces the temperature of the center drill 3 during working.
A hole processing method, using the cluster drill, includes the steps of:
(1) Connecting the cluster drill to the drilling equipment, in particular, connecting the stator with the drill rod;
(2) High-pressure medium is input into the pressure medium spiral channel from the pressure medium inlet of the stator, so that the rotor rotates. The stator and the sun gear are coaxially fixed, namely the sun gear is a fixed wheel, and the rotor drives the planet carrier to rotate. When in use, the planet wheel revolves around the sun wheel while rotating;
(3) The drilling equipment is axially pushed, the center drill firstly contacts the processing material (such as rock stratum) and starts to drill a center hole on the processing material; and the center drill is cooled by a cooling medium in the cooling channel.
(4) As the drilling equipment advances, the milling cutter contacts the machining substance and begins milling the hole wall; at the moment, only part of the milling cutter is in contact with the hole wall and cuts, namely the milling cutter is in intermittent cutting, so that the heat dissipation effect of the milling cutter during working is guaranteed.
(5) The drilling equipment continues to advance, the center drill completes the drilling of the center hole, and the milling cutter completes the milling of the hole wall.
During processing, drilling parameters are calculated as follows:
1. known parameters include:
ratio of sun gear to planetary gear: i.e 23 ；
Transfer ratio of planet: i.e 34 ；
Planetary carrier rotational speed: n is n 21 ；
Milling cutter rotational speed: n is n 24 ＝n 21 *i 23* i 34 ；
Axial feed speed of the planet carrier: f, performing the following steps;
by the known drilling parameters, the relation of the parameters in the drilling process is as follows:
2. the calculated drilling parameters of the milling cutter:
the maximum cutting speed V (namely, the cutting speed of the hole wall) in drilling is the combination of the rotation speed of the milling connecting end cover and the revolution speed around the center of the sun gear: v=n 21 *2π*H+n 24 *2π*r；
Where H is the distance between the center drill axis and the milling cutter axis and r is the radius of the milling cutter.
Milling cutter circumferential feed speedDegree (feed angular velocity): 2 pi n 21 ；
Milling cutter axial feed speed (axial feed speed of carrier): f (unit: mm/min); thirdly, calculating drilling parameters of the center drill:
center borehole revolution (speed carrier rotation): n is n 21 ；
Axial feed speed of the planet carrier (i.e. axial feed speed of the milling cutter): f, performing the following steps;
center drill hole diameter (center drill diameter).
When the axial feeding speed of the connecting end cover is lower during hole rotation, a cylindrical hole can be machined; when the axial feeding speed of the connecting end cover is higher, a special-shaped hole with a threaded groove on the hole wall can be processed. Thus, the first and second substrates are bonded together,
the scheme also provides a processing method of the special-shaped hole (the hole wall is provided with a thread groove), which comprises the following steps:
(1) Connecting a cluster drill to the drilling equipment and drilling a base hole (the diameter of the base hole is D);
(2) The single-blade disc is replaced (the single-blade disc refers to a milling cutter which is only provided with a planet wheel drive, and a connecting end cover of a central drill is not provided), and the radius R' =R-H of the single-blade disc (H is the distance between the axis of the central drill and the axis of the milling cutter, and R is the maximum outer diameter of the special-shaped hole).
(3) Adjusted to the rotation speed n of the planet carrier 21 Mode proportional to the axial feed speed f of the planet carrier: f=n 21 *H；
(4) Setting the number of corresponding milling cutters according to the number of the spiral grooves;
(5) Finishing the processing of the spiral holes with the same rotation direction;
(6) When the cluster drilling machine retreats, the reverse spiral groove can be machined, so that the machining of the special-shaped hole is completed.
The unidirectional spiral groove (namely, the spiral groove with only left or right rotation) is processed, and if the stator is in threaded fit connection with the drill rod, the forward and reverse rotation drill rod and the device can be configured, so that the processing of the unidirectional spiral groove is completed.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (8)
1. A cluster drill, comprising: the device comprises a power device, a variable speed transmission system and a cluster cutter group driven by the variable speed transmission system, wherein the cluster cutter group comprises a central drill for drilling a central hole and milling cutters arranged on the outer circumference of the central drill, and the milling cutters can revolve around the axis of the central drill and simultaneously rotate to mill the inner wall of the central hole; the variable speed transmission system comprises a sun gear, a planet gear and a planet carrier; the sun gear is a fixed wheel, and the center drill is in transmission connection with the planet carrier and is driven to rotate by the planet carrier; the milling cutter is arranged on the planet carrier, the planet carrier drives the milling cutter to revolve around the axis of the center drill, and the planet wheel drives the planet wheel to rotate; the planetary gear is provided with a first power output shaft, the first power output shaft is arranged on the planetary carrier in a rotating fit manner, and the milling cutter is arranged on the first power output shaft in a transmission fit manner; the power device comprises a stator, a rotor sleeved outside the stator and coaxial with the stator, and a bracket connecting piece, wherein the rotor is in running fit with the stator, and the rotor is connected with the planet carrier through the bracket connecting piece.
2. The cluster drill of claim 1, wherein: and a speed increasing wheel is also in transmission fit between the milling cutter and the planet wheel.
3. The method of using a cluster drilling tool of claim 2, wherein: the drill bit of the center drill protrudes out of the machining surface of the milling cutter, and the machining radius of the center drill is partially overlapped with the machining radius of the milling cutter.
4. The method of using a cluster drilling tool of claim 1, wherein: the side edges of the milling cutter protrude from the side edges of the planet carrier.
5. The cluster drill of claim 1, wherein: the planet carrier is internally provided with a space for accommodating the sun gear and the planet gears.
6. The cluster drill of claim 5, wherein: the planet carrier comprises a planet wheel seat and a connecting end cover, wherein a supporting piece is arranged on the end face of one side of the planet wheel seat, which faces the connecting end cover, and the supporting piece is connected with the periphery of the connecting end cover along the axial direction.
7. The cluster drill of claim 1, wherein: the sun gear is axially provided with a cooling medium channel for cooling the medium passing through the center drill.
8. A hole processing method is characterized in that: use of a cluster drill according to any one of claims 1 to 7, the processing steps comprising:
(1) Connecting the cluster drill to the drilling equipment, wherein the stator is connected with the drill rod;
(2) The central drill rotates, and the milling cutter revolves around the sun gear while rotating;
(3) While the cluster drill moves axially, the center drill first contacts the machining substance and begins to drill a center hole in the machining substance;
(4) As the drilling equipment advances, the milling cutter contacts the machining substance and begins milling the hole wall;
(5) The drilling equipment continues to advance, the center drill completes the drilling of the center hole, and the milling cutter completes the milling of the hole wall.
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| CN202110352810.3A CN113027332B (en) | 2021-03-31 | 2021-03-31 | Cluster type drilling device and hole processing method |
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| CN202110352810.3A CN113027332B (en) | 2021-03-31 | 2021-03-31 | Cluster type drilling device and hole processing method |
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| CN115354966B (en) * | 2022-10-24 | 2023-03-24 | 江苏翼电科技有限公司 | Modular rotary drilling machine drill bit |
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| US6488103B1 (en) * | 2001-01-03 | 2002-12-03 | Gas Research Institute | Drilling tool and method of using same |
| CN201250609Y (en) * | 2008-09-22 | 2009-06-03 | 贾可良 | Negative-pressure cyclic rotating and impacting combined drill bit with built-in power |
| CN105735898A (en) * | 2016-03-25 | 2016-07-06 | 柳超 | Three-speed bit for drilling deep wells |
| CN205713986U (en) * | 2016-06-07 | 2016-11-23 | 鹤壁中泰矿业有限公司 | A kind of down-hole geological drilling Counterboring apparatus |
| CN111502669A (en) * | 2020-04-30 | 2020-08-07 | 河南发恩德矿业有限公司 | Reamer for reverse well construction |
| CN215672013U (en) * | 2021-03-31 | 2022-01-28 | 中煤科工集团重庆研究院有限公司 | Bundling type drilling device |
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| CN113027332A (en) | 2021-06-25 |
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