CN112453930A - Drilling equipment with steering function - Google Patents

Drilling equipment with steering function Download PDF

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Publication number
CN112453930A
CN112453930A CN202011337233.2A CN202011337233A CN112453930A CN 112453930 A CN112453930 A CN 112453930A CN 202011337233 A CN202011337233 A CN 202011337233A CN 112453930 A CN112453930 A CN 112453930A
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CN
China
Prior art keywords
fixedly connected
inboard
drilling
gear
motor
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.)
Pending
Application number
CN202011337233.2A
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Chinese (zh)
Inventor
吴向忠
高明铭
冉晓茹
李军舰
朱坤
彭晓云
谭幸运
朱宏杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hunan Jiuwu Fine Machinery Co ltd
Original Assignee
Hunan Jiuwu Fine Machinery Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hunan Jiuwu Fine Machinery Co ltd filed Critical Hunan Jiuwu Fine Machinery Co ltd
Priority to CN202011337233.2A priority Critical patent/CN112453930A/en
Publication of CN112453930A publication Critical patent/CN112453930A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/22—Feeding members carrying tools or work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/44—Movable or adjustable work or tool supports using particular mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/22—Feeding members carrying tools or work
    • B23Q5/28—Electric drives

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)

Abstract

The invention relates to the technical field of drilling, in particular to drilling equipment with a steering function, which comprises a supporting seat, a clamping plate, a second limiting rod, a first spring, a controller and a drill rod steering mechanism, wherein the clamping plate is connected with the inner side of the supporting seat in a sliding manner, the second limiting rod is fixedly connected with the inner side of the supporting seat, the first spring is arranged on the outer side of the second limiting rod, the drill rod steering mechanism comprises a side plate, a first motor is fixedly connected with the inner side of the top end of the side plate, and a worm is fixedly connected with the tail end of a main shaft of the first motor. The steering method of the drill rod is simple and quick.

Description

Drilling equipment with steering function
Technical Field
The invention relates to the technical field of drilling, in particular to drilling equipment with a steering function.
Background
Drilling generally refers to the operation of machining a hole in a solid material with a drill bit. Common drilling equipment comprises an electric drill, a drilling machine and the like, along with the further development of the machining process, the efficiency of the drilling equipment is greatly improved, and the drilling equipment is widely applied to machining.
However, the existing drilling device still has the following defects in actual use, and the existing drilling equipment mostly does not have a steering function, so that the object is required to be drilled from a plurality of angles by manual handheld rotation, and the application range is further reduced.
Disclosure of Invention
The present invention is directed to a drilling apparatus with steering function to solve the above problems of the related art.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a have and turn to function drilling equipment, includes the supporting seat, the splint of the inboard sliding connection of supporting seat, the first spring, controller and drilling rod steering mechanism that the inboard fixed connection's of supporting seat second gag lever post, second gag lever post outside set up, drilling rod steering mechanism includes the curb plate, the inboard first motor of fixedly connected with in top of curb plate, the terminal fixedly connected with worm of main shaft of first motor, the bottom of worm is rotated with the bottom inboard of curb plate and is connected, the inboard rotation in top of curb plate is connected with the pivot, the outside fixedly connected with worm wheel of pivot, the outside of worm wheel meshes with the outside of worm mutually, the front end fixedly connected with connecting box of pivot, be provided with drilling rod extension mechanism on the connecting box, the downside of supporting seat is provided with and supports steering mechanism.
Preferably, the bottom end inner side of the clamping plate is connected with the outer side of the second limiting rod in a sliding mode, and two ends of the first spring are fixedly connected with the inner side of the supporting seat and one side of the clamping plate respectively.
Preferably, the drill rod extending mechanism comprises a second gear and a second motor, the second gear is rotatably arranged on the inner side of the connecting box, a limiting ring is fixedly connected to the top end of the second gear, and the outer side of the limiting ring is in sliding connection with the inner side of the connecting box.
Preferably, the end of the main shaft of the second motor is fixedly connected with a first gear, the first gear is rotatably arranged on the inner side of the connecting box, and the first gear is meshed with the second gear.
Preferably, the inboard spiral connection of second gear has the lifting screw, the bottom fixedly connected with connecting plate of lifting screw, the connecting plate slides and sets up the inboard at the connecting box, the top of connecting plate is the square setting, the bottom of connecting plate sets up the outside at the connecting box.
Preferably, the inner side of the bottom end of the connecting plate is slidably connected with a connecting rod, the bottom end of the connecting rod is fixedly connected with a connecting motor box, the inner side of the motor box is fixedly connected with a third motor, the tail end of a main shaft of the third motor is fixedly connected with a connecting seat, the connecting seat is arranged on the lower side of the motor box, and the inner side of the connecting seat is detachably and spirally connected with a drill rod.
Preferably, the supporting and steering mechanism comprises a base, the top rear side of the base is fixedly connected with the bottom end of the side plate, a first limiting rod is fixedly connected to the inner side of the base, and a wedge block is slidably connected to the inner side of the base.
Preferably, the number of wedge is 2, the wedge symmetry sets up the inboard at the base, the top of wedge and the bottom one side sliding connection of supporting seat.
Preferably, the inner side of the base is rotatably connected with a first screw, the left end of the first screw is rotatably connected with the inner side of the left end of the base, and the outer side of the first screw is spirally connected with the inner side of the wedge-shaped block.
Preferably, the right end of the first screw is fixedly connected with a rotating wheel, and the rotating wheel is arranged on the outer side of the base.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the direction of the drill rod can be steered through the drill rod steering mechanism, so that drilling in different directions can be realized, when the drill rod is steered, the controller controls the first motor to rotate, the first motor drives the worm to rotate, the worm can drive the worm wheel to rotate in the rotating process, the worm wheel can drive the rotating shaft to rotate, the rotating shaft can drive the connecting box to rotate, and the connecting box can drive the drill rod to change the direction through the connecting rod.
2. According to the invention, the steering mechanism can be supported to realize steering of the drilling direction, so that different drilling requirements can be met, a worker rotates the rotating wheel, the rotating wheel drives the first screw rod to rotate, the first screw rod can drive the wedge block to move leftwards or rightwards in the rotating process of the first screw rod, the arranged first limiting rod plays a role in limiting the movement direction of the wedge block, when the wedge blocks on the two sides move leftwards or rightwards, the supporting seat can be forced to incline leftwards or rightwards, the supporting seat can drive the drilling object to incline leftwards or rightwards, the angle corresponding to the drilling object and the drilling rod is changed, and the steering effect is achieved.
3. According to the invention, the drill rod can be moved back and forth through the drill rod extending mechanism, so that automatic drilling of an object is realized, the second motor rotates, the second motor drives the first gear to rotate, the first gear drives the second gear to rotate, the second gear can drive the lifting screw to move up or down in the rotating process, the lifting screw can drive the connecting plate to move upwards or downwards, the connecting plate can drive the drill rod to move upwards or downwards through the connecting seat, so that drilling of the object is realized, the arranged connecting rod and the second spring can play a role in buffering the connecting seat on one hand, the drill rod can be tightly attached to the front of the drill hole under the action of the second spring on one hand, the drilling is convenient to perform, and the drilling tool has good practicability.
Drawings
FIG. 1 is a schematic view of an integral cutaway mounting arrangement of the present invention;
FIG. 2 is a schematic external view of the support steering mechanism of the present invention;
FIG. 3 is a schematic view of the mounting structure of the worm gear of the present invention;
FIG. 4 is a schematic side view of the drill bit extension mechanism of the present invention;
FIG. 5 is a schematic view of the mounting structure shown at A in FIG. 1 according to the present invention;
FIG. 6 is a schematic view of the installation structure at B in FIG. 1 according to the present invention;
fig. 7 is a schematic view of the installation structure at C in fig. 1 according to the present invention.
In the figure: 1-supporting steering mechanism, 101-wedge block, 102-first screw rod, 103-supporting plate, 104-base, 105-rotating wheel, 106-first limiting rod, 2-supporting base, 3-clamping plate, 4-second limiting rod, 5-first spring, 6-drill rod steering mechanism, 601-side plate, 602-first motor, 603-worm wheel, 604-worm, 605-connecting box, 606-rotating shaft, 7-controller, 8-drill bit extending mechanism, 801-second motor, 802-first gear, 803-second gear, 804-limiting ring, 805-lifting screw rod, 806-connecting plate, 807-connecting rod, 808-second spring, 809-motor box, 810-third motor, 811-connecting seat, 812-drill pipe.
Detailed Description
Example 1:
referring to fig. 1-7, the present invention provides a technical solution:
a drilling device with a steering function comprises a supporting seat 2, a clamping plate 3, a second limiting rod 4, a first spring 5, a controller 7 and a drill rod steering mechanism 6, wherein the clamping plate 3 is connected with the inner side of the supporting seat 2 in a sliding mode, the second limiting rod 4 is fixedly connected with the inner side of the second limiting rod 4, the first spring 5 is arranged on the outer side of the second limiting rod 4, the drill rod steering mechanism 6 comprises a side plate 601, a first motor 602 is fixedly connected with the inner side of the top end of the side plate 601, a worm 604 is fixedly connected with the tail end of a main shaft of the first motor 602, the bottom end of the worm 604 is rotatably connected with the inner side of the bottom end of the side plate 601, a rotating shaft 606 is rotatably connected with the inner side of the top end of the side plate 601, a worm wheel 603 is fixedly connected with the outer side of the worm wheel 603, the outer side, have fine practicality, during the turn to, the first motor 602 of controller 7 control rotates, first motor 602 drives worm 604 and rotates, worm 604 can drive worm wheel 603 at the pivoted in-process and rotate, worm wheel 603 can drive pivot 606 and rotate, the rotation of pivot 606 can drive the rotation of connecting box 605, the rotation of connecting box 605 can drive drilling rod 812 through connecting rod 606 and carry out ascending transition of side, the steering method of this kind of drilling rod, it is simple swift, and has fine practicality, be provided with drilling rod extension mechanism 8 on the connecting box 605, the downside of supporting seat 2 is provided with support steering mechanism 1.
The inner side of the bottom end of the clamping plate 3 is connected with the outer side of the second limiting rod 4 in a sliding manner, two ends of a first spring 5 are respectively fixedly connected with the inner side of the supporting seat 2 and one side of the clamping plate 3, the drill rod extending mechanism 8 comprises a second gear 803 and a second motor 801, the second gear 803 is rotationally arranged on the inner side of the connecting box 605, the top end of the second gear 803 is fixedly connected with a limiting ring 804, the outer side of the limiting ring 804 is connected with the inner side of the connecting box 605 in a sliding manner, the tail end of a main shaft of the second motor 801 is fixedly connected with a first gear 802, the first gear 802 is rotationally arranged on the inner side of the connecting box 605, the first gear 802 is meshed with the second gear 803, the inner side of the second gear 803 is spirally connected with a lifting screw 805, the bottom end of the lifting screw 805 is fixedly connected with a connecting plate 806, the connecting plate 806 is slidably arranged on the inner side of the connecting box 605, the inner side of the bottom end of the connecting plate 806 is slidably connected with a connecting rod 807, the bottom end of the connecting rod 807 is fixedly connected with a connecting motor box 809, the inner side of the motor box 809 is fixedly connected with a third motor 810, the tail end of a main shaft of the third motor 810 is fixedly connected with a connecting seat 811, the connecting seat 811 is arranged at the lower side of the motor box 809, the inner side of the connecting seat 811 is detachably and spirally connected with a drill rod 812, when the drill rod 812 needs to be extended, the controller 7 controls the second motor 801 to rotate, the second motor 801 drives the first gear 802 to rotate, the first gear 802 drives the second gear 803 to rotate, the second gear 803 drives the lifting screw 805 to move up or down in the rotating process, the lifting screw 805 drives the connecting plate 806 to move up or down, the connecting plate 806 drives the drill rod 812 to move up or down through the connecting seat 811, thereby drilling an object, the connecting rod 807 and the second spring 808 are arranged to play a role of buffering the connecting seat 811, on one hand, the drill rod 812 can be kept to be tightly attached to the front of a drilled hole under the action of the second spring 808, the drilling is convenient to be carried out, and the supporting and steering mechanism 1 has good practicability, the rear side of the top end of the base 104 is fixedly connected with the bottom end of the side plate 601, the inner side of the base 104 is fixedly connected with the first limiting rod 106, the inner side of the base 104 is slidably connected with the wedge blocks 101, the number of the wedge blocks 101 is 2, the wedge blocks 101 are symmetrically arranged on the inner side of the base 104, the top end of the wedge block 101 is slidably connected with one side of the bottom end of the supporting seat 2, the inner side of the base 104 is rotatably connected with the first screw rod 102, the left end of the first screw rod 102 is rotatably connected with the inner side of the left end of the base 104, the outer, the right end of the first screw 102 is fixedly connected with a rotating wheel 105, and the rotating wheel 105 is arranged on the outer side of the base 104.
The working process is as follows: when the drilling rod 812 needs to be elongated, the controller 7 controls the second motor 801 to rotate, the second motor 801 drives the first gear 802 to rotate, the first gear 802 drives the second gear 803 to rotate, the second gear 803 drives the lifting screw 805 to move up or down in the rotating process, the lifting screw 805 drives the connecting plate 806 to move up or down, and the connecting plate 806 drives the drilling rod 812 to move up or down through the connecting seat 811, thereby realize the drilling to the object, the connecting rod 807 and the second spring 808 that set up can play the effect of buffering connecting seat 811 on the one hand, and a face makes drilling rod 812 can keep hugging closely with the place ahead of drilling under the effect of second spring 808, and the going on of being convenient for drill has fine practicality.
The drill rod steering mechanism can realize steering of the drill rod 812 in the direction through the drill rod steering mechanism 6, so that drilling in different directions is realized, and the drill rod steering mechanism has good practicability.
Example 2: in this embodiment, the same places as those in embodiment 1 are not described again, but the invention can also realize the steering of the drilling direction by the supporting steering mechanism 1, so as to meet different drilling requirements, when working, a worker can firstly place a drilling object in the middle of the clamping plates 3 at the two sides of the supporting seat 2, the clamping plates 3 can fix the drilling object under the action of the first spring 5, when the drilling object is steered, the worker rotates the rotating wheel 105, the rotating wheel 105 drives the first screw 102 to rotate, during the rotation of the first screw 102, the first screw 102 can drive the wedge block 101 to move leftwards or rightwards, the arranged first limiting rod 106 can limit the moving direction of the wedge block 101, when the wedge blocks at the two sides move leftwards or rightwards, the supporting seat 2 can be forced to tilt leftwards or rightwards, the supporting seat 2 can drive the drilling object to tilt leftwards or rightwards, thereby changing the angle of the borehole relative to the drill pipe 812 and acting as a steering action.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the technical features described above may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.

Claims (10)

1. The utility model provides a have and turn to function drilling equipment, includes supporting seat (2), splint (3) of the inboard sliding connection of supporting seat (2), second gag lever post (4) of the inboard fixed connection of supporting seat (2), first spring (5), controller (7) and drilling rod steering mechanism (6) that second gag lever post (4) outside set up, its characterized in that: drilling rod steering mechanism (6) include curb plate (601), the inboard fixedly connected with first motor (602) in top of curb plate (601), the terminal fixedly connected with worm (604) of main shaft of first motor (602), the bottom of worm (604) is connected with the inboard rotation in bottom of curb plate (601), the inboard rotation in top of curb plate (601) is connected with pivot (606), the outside fixedly connected with worm wheel (603) of pivot (606), the outside of worm wheel (603) meshes with the outside of worm (604) mutually, the front end fixedly connected with connecting box (605) of pivot (606), be provided with drilling rod extension mechanism (8) on connecting box (605), the downside of supporting seat (2) is provided with support steering mechanism (1).
2. A drilling apparatus with steering function according to claim 1, characterized in that: the bottom of splint (3) inboard and the outside sliding connection of second gag lever post (4), the both ends of first spring (5) respectively with the inboard of supporting seat (2) and one side fixed connection of splint (3).
3. A drilling apparatus with steering function according to claim 1, characterized in that: the drill rod extending mechanism (8) comprises a second gear (803) and a second motor (801), the second gear (803) is rotatably arranged on the inner side of the connecting box (605), the top end of the second gear (803) is fixedly connected with a limiting ring (804), and the outer side of the limiting ring (804) is in sliding connection with the inner side of the connecting box (605).
4. A drilling apparatus with steering function according to claim 3, characterized in that: the tail end of a main shaft of the second motor (801) is fixedly connected with a first gear (802), the first gear (802) is rotatably arranged on the inner side of the connecting box (605), and the first gear (802) is meshed with a second gear (803).
5. The drilling apparatus with steering function according to claim 4, wherein: the inner side of the second gear (803) is spirally connected with a lifting screw (805), the bottom end of the lifting screw (805) is fixedly connected with a connecting plate (806), the connecting plate (806) is arranged on the inner side of the connecting box (605) in a sliding mode, the top end of the connecting plate (806) is arranged in a square mode, and the bottom end of the connecting plate (806) is arranged on the outer side of the connecting box (605).
6. The drilling apparatus with steering function according to claim 5, wherein: the utility model discloses a drilling machine, including connecting plate (806), motor case (809), inboard sliding connection in bottom of connecting plate (806) has connecting rod (807), the bottom fixedly connected with of connecting rod (807) connects motor case (809), the inboard fixedly connected with third motor (810) of motor case (809), the terminal fixedly connected with connecting seat (811) of main shaft of third motor (810), states connecting seat (811) and sets up the downside at motor case (809), the inboard detachable spiral connection of connecting seat (811) has drilling rod (812).
7. A drilling apparatus with steering function according to claim 1, characterized in that: support steering mechanism (1) and include base (104), the top rear side of base (104) and the bottom fixed connection of curb plate (601), the inboard fixedly connected with first gag lever post (106) of base (104), the inboard sliding connection of base (104) has wedge (101).
8. A drilling apparatus with steering function according to claim 7, characterized in that: the quantity of wedge piece (101) is 2, wedge piece (101) symmetry sets up the inboard at base (104), the top of wedge piece (101) and the bottom one side sliding connection of supporting seat (2).
9. A drilling apparatus with steering function according to claim 7, characterized in that: the inner side of the base (104) is rotatably connected with a first screw (102), the left end of the first screw (102) is rotatably connected with the inner side of the left end of the base (104), and the outer side of the first screw (102) is spirally connected with the inner side of the wedge block (101).
10. A drilling apparatus with steering function according to claim 9, characterized in that: the right end of the first screw rod (102) is fixedly connected with a rotating wheel (105), and the rotating wheel (105) is arranged on the outer side of the base (104).
CN202011337233.2A 2020-11-25 2020-11-25 Drilling equipment with steering function Pending CN112453930A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011337233.2A CN112453930A (en) 2020-11-25 2020-11-25 Drilling equipment with steering function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011337233.2A CN112453930A (en) 2020-11-25 2020-11-25 Drilling equipment with steering function

Publications (1)

Publication Number Publication Date
CN112453930A true CN112453930A (en) 2021-03-09

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Application Number Title Priority Date Filing Date
CN202011337233.2A Pending CN112453930A (en) 2020-11-25 2020-11-25 Drilling equipment with steering function

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN209380283U (en) * 2018-11-30 2019-09-13 山东山诚机械科技股份有限公司 A kind of adjustable multi spindle drilling machine of bore angle
US10610989B1 (en) * 2018-12-19 2020-04-07 Top-One Machinery Co., Ltd. Rim drilling and milling machine
CN210435419U (en) * 2019-05-29 2020-05-01 招远市远银银业有限公司 Multi-angle drilling device for silverware machining
CN210948479U (en) * 2019-10-18 2020-07-07 中矿资源集团股份有限公司 Drilling device for mine survey construction
CN211489709U (en) * 2019-11-22 2020-09-15 浙江海洋大学 Punching positioning device with protection function
CN211516737U (en) * 2019-12-21 2020-09-18 福建嘉喜不锈钢制品有限公司 Drilling equipment is used in production of stainless steel kitchen utensils and appliances
CN211842622U (en) * 2020-03-15 2020-11-03 聊城职业技术学院 Dustless drilling equipment for architectural decoration

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN209380283U (en) * 2018-11-30 2019-09-13 山东山诚机械科技股份有限公司 A kind of adjustable multi spindle drilling machine of bore angle
US10610989B1 (en) * 2018-12-19 2020-04-07 Top-One Machinery Co., Ltd. Rim drilling and milling machine
CN210435419U (en) * 2019-05-29 2020-05-01 招远市远银银业有限公司 Multi-angle drilling device for silverware machining
CN210948479U (en) * 2019-10-18 2020-07-07 中矿资源集团股份有限公司 Drilling device for mine survey construction
CN211489709U (en) * 2019-11-22 2020-09-15 浙江海洋大学 Punching positioning device with protection function
CN211516737U (en) * 2019-12-21 2020-09-18 福建嘉喜不锈钢制品有限公司 Drilling equipment is used in production of stainless steel kitchen utensils and appliances
CN211842622U (en) * 2020-03-15 2020-11-03 聊城职业技术学院 Dustless drilling equipment for architectural decoration

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Application publication date: 20210309