CN216371011U - Vertical drilling machine - Google Patents

Vertical drilling machine Download PDF

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Publication number
CN216371011U
CN216371011U CN202123073219.9U CN202123073219U CN216371011U CN 216371011 U CN216371011 U CN 216371011U CN 202123073219 U CN202123073219 U CN 202123073219U CN 216371011 U CN216371011 U CN 216371011U
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China
Prior art keywords
screw rod
fixed
lead screw
drilling machine
back plate
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CN202123073219.9U
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Chinese (zh)
Inventor
夏海鹏
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Wenling Haipeng Automation Equipment Co ltd
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Wenling Haipeng Automation Equipment Co ltd
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Abstract

The utility model provides an upright drilling machine, and belongs to the technical field of tapping and drilling processing equipment. It has solved the poor problem of current drilling machine adaptability. This drilling machine includes workstation and at least one cutter unit spare, this upright drilling machine still includes first lead screw subassembly, second lead screw subassembly and third lead screw subassembly, first lead screw subassembly is fixed on the workstation, it can follow the gliding slider of vertical direction to have on the first lead screw subassembly, the second lead screw subassembly is fixed on slider one, it can follow the gliding slider of vertical direction to have on the second lead screw subassembly second, the third lead screw subassembly is fixed on slider two, the third lead screw subassembly has and can follow the horizontal direction and slide and be provided with slider three, cutter unit spare all fixes on slider three, it is equipped with anchor clamps to lie in cutter unit spare below on the workstation. The drilling machine enables the cutter assembly fixed on the drilling machine to have a large moving range to deal with workpieces of various sizes by overlapping the three groups of screw rod assemblies, and the adaptability is greatly improved.

Description

Vertical drilling machine
Technical Field
The utility model belongs to the technical field of tapping and drilling processing equipment, relates to a drilling machine, and particularly relates to an upright drilling machine.
Background
The drilling machine is comparatively common equipment in the current workshop, and the hole site on the drilling machine mainly used processing work piece, current drilling machine generally all comprise a aircraft nose and the drill bit that can reciprocate, are connected with servo motor on the aircraft nose, and the drill bit is connected with servo motor's output shaft, drives the drill bit through servo motor and rotates and attack the brill to the work piece.
With the gradual use of the existing drilling machine, the existing drilling machine is not convenient for tapping and drilling workpieces with large volumes. The distance between the drill bit and the workbench is limited, and the drill bit generally protrudes out of one part of the lower part of the machine head due to the fact that the drill bit is in a long strip shape, so that the distance between the drill bit and the workbench is very limited, after a workpiece with a large size is placed on the workbench, the drill bit does not have a sufficient stroke space to attack drilling, and after the workpiece with the large size is placed on the workbench, the workpiece with the large size can be abutted against the drill bit, and the machining cannot be carried out at all.
Disclosure of Invention
The utility model aims to solve the problems in the prior art and provides an upright drilling machine. It solves the technical problem that the existing drilling machine has poor adaptability.
The purpose of the utility model can be realized by the following technical scheme:
the utility model provides an upright drill, includes workstation and at least one cutter unit spare, its characterized in that, this upright drill still includes first lead screw subassembly, second lead screw subassembly and third lead screw subassembly, first lead screw subassembly is fixed on the workstation, it can follow the gliding slider of vertical direction to have on the first lead screw subassembly, second lead screw subassembly is fixed on slider one, it can follow the gliding slider of vertical direction to have on the second lead screw subassembly two, third lead screw subassembly is fixed on slider two, third lead screw subassembly has and can follow the horizontal direction and slide and be provided with slider three, cutter unit spare is all fixed on slider three, it is equipped with anchor clamps to lie in cutter unit spare below on the workstation.
The drilling machine enables the cutter assembly fixed on the drilling machine to have a large moving range to cope with workpieces of various sizes through the superposition of three groups of screw rod assemblies, the first screw rod assembly of the drilling machine is fixed with a workbench, the first screw rod assembly is a vertically arranged slide block I and can slide along the vertical direction, the second group of screw rod assembly is fixed on the slide block I, the second screw rod assembly is provided with a slide block II which can slide along the vertical direction, the third screw rod assembly is fixed on the slide block II, the slide block III on the third screw rod assembly can slide along the horizontal direction, the cutter assembly is fixed on the slide block III, the cutter assembly is provided with a telescopic stroke of the slide block I and the slide block II in the vertical direction, drilling of parts of various sizes can be coped with, and the adaptability is greatly improved.
The position of the cutter assembly in the horizontal direction can be adjusted by sliding the third sliding block, and even if some hole positions which are not aligned with the central axis of the clamp are machined, the cutter and the hole positions can be aligned by moving the third sliding block, so that the cutter assembly can meet the drilling requirements of various positions, and the adaptability is further improved.
In foretell upright drill, first lead screw subassembly includes base and lead screw one, the lateral part of base is equipped with bellied boss, be equipped with the stroke groove on the boss, a vertical setting of lead screw is in the stroke inslot, set up on the slider one with boss assorted spout, the boss inlays to be established in the spout and slider one and a lead screw threaded connection.
First lead screw subassembly is used for bearing second lead screw subassembly equivalent to the base, third lead screw subassembly and cutter unit spare, so the base makes the upper and lower slip ability of slider one more stable through the cooperation of boss with the spout, slider one and a fixed rotation through lead screw one of lead screw thread connection drive slider one slide from top to bottom, utilize the principle of lead screw to drive the second lead screw subassembly and the lifting of the part on it, it is very convenient to adjust the position of cutter unit spare to design like this, make cutter unit spare can process the work piece of various sizes, the adaptability further obtains promoting.
In the vertical drilling machine, the width of the boss is increased along with the increase of the height of the protrusion, the width of the sliding groove is increased along with the increase of the depth of the sliding groove, the boss is located in the sliding groove, and two side faces of the boss are respectively in blocking connection with two side groove walls of the sliding groove.
The boss is the structure of falling the trapezium, and its width is increased gradually to keeping away from base one side by being close to base one side, has on the slider one with boss complex spout, the both sides face of the boss of structure like this can form with the both sides cell wall of spout and keep out, the boss closely cooperates with slider one together for slider one is better at slip in-process stability, and the area of contact of boss and slider one is great moreover, makes better unloading of the bearing ability of slider one on the base, and joint strength is high.
In the vertical drilling machine, the top of the base is provided with a handle capable of driving the screw rod to rotate.
The height of the cutter is manually adjusted by rotating the handle, so that the design is equivalent to adjusting the initial height of the cutter assembly, the cutter assembly is adaptive to workpieces with large volumes, and the adaptability is good.
In the vertical drilling machine, the second lead screw assembly comprises a second back plate and a second lead screw, the second back plate is fixed on the first slide block, the second lead screw is vertically arranged and axially fixed on the second back plate, the second slide block is in threaded connection with the second lead screw, linear guide rails I parallel to the lead screw are arranged on the second back plate and located on two sides of the lead screw, moving blocks I capable of sliding along the linear guide rails are arranged on the linear guide rails I, two ends of the second slide block are respectively fixed with the two moving blocks I, and the third lead screw assembly is fixed on the second slide block.
The second screw rod assembly controls the second sliding block to move up and down through the second screw rod, two groups of linear guide rails I are arranged on two sides of the second screw rod, the third screw rod assembly is fixed on the second sliding block, and two sides of the second sliding block are fixed with the first moving blocks on the linear guide rails I.
In the vertical drilling machine, the first servo motor is fixed on the second back plate, the second screw rod is fixed with an output shaft of the servo motor, and the second screw rod is driven to rotate by the servo motor.
The second screw rod assembly drives the second screw rod assembly to rotate through the servo motor, the second screw rod assembly mainly acts as a cutter assembly capable of moving up and down during machining, the motor is used for driving the second screw rod assembly to rotate so as to enable the second sliding block assembly to rotate, and only the positive rotation and the negative rotation of the servo motor need to be controlled, so that the operation is very convenient.
In the vertical drilling machine, the third screw rod assembly comprises a third back plate and a third screw rod, the third back plate is fixed with a second sliding block, the third screw rod is horizontally arranged and axially fixed on the third back plate, two sides of the third screw rod are respectively provided with a second linear guide rail, the second linear guide rail is respectively provided with a second moving block capable of sliding along the second linear guide rail, the third sliding block is in threaded connection with the third screw rod, the third sliding block is fixedly provided with a first back plate, two ends of the first back plate are respectively fixed with the two second moving blocks, the middle of the first back plate is fixed with the third sliding block, and the cutter assembly is fixed on the first back plate.
The third lead screw subassembly is mainly used for adjusting the position of cutter at the horizontal direction, and this design also carries out position control through lead screw three, is provided with linear guide two in the both sides of lead screw three, and the effect of design is the same basically with the effect of linear guide two on the second lead screw subassembly like this, makes the range of processing of cutter wider on the basis of the motion stability who guarantees the cutter, and adaptability further promotes.
In the vertical drilling machine, the back plate III is fixedly provided with the servo motor II, and one end of the screw rod III is fixed with an output shaft of the servo motor II and can be driven to rotate through the servo motor II.
The third screw rod assembly is driven by the servo motor II to enable the cutter assembly to horizontally move, and the cutter assembly is simple in design and operation and very convenient to use.
In the vertical drilling machine, the cutter assembly is provided with two groups of drill bits and chamfering heads, and the drill bits and the chamfering heads are driven to rotate by the motor.
The cutter assembly of this design has two kinds to be drill bit and chamfer head respectively, and drill bit and chamfer head all adopt motor drive pivoted, and this drilling machine can move the chamfer head to the hole site department of drilling to carry out the chamfer through the removal of third lead screw subassembly after drilling, and once processing accomplishes twice process, has improved machining efficiency greatly. And the adaptability is further improved whether the workpiece facing the single drilling hole is good or the workpiece facing the single chamfering hole can be separately machined.
In the vertical drilling machine, the clamp is a three-jaw chuck or an internal expansion clamp.
Compared with the prior art, the product has the advantages that:
1. this drilling machine uses through the stack of three lead screw subassemblies to make the cutter unit who fixes on it can have great home range and deal with the work piece of various sizes, and cutter unit has slider one and two superimposed flexible strokes of slider in vertical direction, can deal with the drilling of the part of various sizes, has the third lead screw subassembly again in the horizontal direction and can drive the processing of its translation adaptation various positions, and adaptability obtains promotion by a wide margin.
2. This drilling machine can carry out the chamfer through the removal of third lead screw subassembly with the chamfer head removal to the hole site department of drilling after the drilling is ended, once processes and accomplishes twice process, has improved machining efficiency greatly, and no matter also good or can process alone in the face of the work piece of independent drilling in addition, adaptability obtains further promotion.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a schematic view of a first lead screw assembly of the present invention;
FIG. 4 is a schematic view of a portion of the structure of the present invention;
FIG. 5 is a detail view of a first slider of the present invention;
FIG. 6 is a schematic view of a portion of the second lead screw assembly of the present invention;
fig. 7 is a partial structural schematic view of a third lead screw assembly of the present invention.
In the figure, 1, a workbench; 2. a cutter assembly; 21. a drill bit; 22. chamfering the head; 3. a first lead screw assembly; 31. a first sliding block; 311. a chute; 32. a base; 321. a boss; 322. a stroke slot; 33. a first screw rod; 34. a handle; 4. a second lead screw assembly; 41. a second sliding block; 42. a second backboard; 43. a second screw rod; 44. a first linear guide rail; 441. moving a first block; 45. a first servo motor; 5. a third lead screw assembly; 51. a third sliding block; 52. a back plate III; 53. a third screw rod; 54. a second linear guide rail; 55. a first backboard; 56. a servo motor II; 6. and (4) clamping.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1-7, the vertical drilling machine includes a worktable 1 and two cutter assemblies 2, the two cutter assemblies 2 are a drill 21 and a tapping head, the drill 21 is connected to a motor capable of driving the drill to rotate, and the tapping head is also connected to a motor capable of driving the tapping head to rotate. This upright drill still includes first lead screw subassembly 3, second lead screw subassembly 4 and third lead screw subassembly 5, first lead screw subassembly 3 is fixed on workstation 1, it can follow the gliding slider of vertical direction 31 to have on the first lead screw subassembly 3, second lead screw subassembly 4 is fixed on slider 31, it can follow the gliding slider of vertical direction two 41 to have on the second lead screw subassembly 4, third lead screw subassembly 5 is fixed on slider two 41, third lead screw subassembly 5 has and can follow the horizontal direction and slide and be provided with slider three 51, cutter unit 2 all fixes on slider three 51, it is equipped with anchor clamps 6 to lie in cutter unit 2 below on workstation 1. The drilling machine enables the cutter assembly 2 fixed on the drilling machine to have a large moving range to deal with workpieces of various sizes through the superposition of three groups of screw rod assemblies, the first screw rod assembly 3 of the drilling machine is fixed with the workbench 1, the first screw rod assembly 3 is vertically provided with the first sliding block 31 which can also slide along the vertical direction, the second group of screw rod assemblies are fixed on the first sliding block 31, the second screw rod assembly 4 is provided with the second sliding block 41 which can also slide along the vertical direction, the second sliding block 41 is fixed on the third screw rod assembly 5, the third sliding block 51 on the third screw rod assembly 5 can slide along the horizontal direction, the cutter assembly 2 is fixed on the third sliding block 51, and therefore the cutter assembly 2 has the superposed telescopic stroke of the first sliding block 31 and the second sliding block 41 in the vertical direction, the drilling machine can deal with the drilling of parts of various sizes, and the adaptability is greatly improved. The position of the cutter assembly 2 in the horizontal direction can be adjusted through the sliding of the third sliding block 51, even if some hole positions which are not aligned with the central axis of the clamp 6 are machined, the cutter and the hole positions can be aligned through the movement of the third sliding block 51, the cutter assembly 2 can meet the drilling requirements of various positions through the design, and the adaptability is further improved. Drill bit 21 and chamfer head 22 all adopt motor drive pivoted, and this drilling machine can remove chamfer head 22 to the hole site department of drilling to carry out the chamfer through the removal of third lead screw subassembly 5 after the drilling, and once processing accomplishes twice process, has improved machining efficiency greatly. And the adaptability is further improved whether the workpiece facing the single drilling hole is good or the workpiece facing the single chamfering hole can be separately machined.
The first screw rod assembly 3 comprises a base 32 and a first screw rod 33, a convex boss 321 is arranged on the side portion of the base 32, a stroke groove 322 is formed in the boss 321, the first screw rod 33 is vertically arranged in the stroke groove 322, a sliding groove 311 matched with the boss 321 is formed in the first sliding block 31, the boss 321 is embedded in the sliding groove 311, and a matching portion in threaded connection with the first screw rod 33 is formed in the first sliding block 31. The width of the boss 321 increases with the increase of the height of the protrusion, the width of the sliding slot 311 increases with the increase of the depth of the sliding slot 311, the boss 321 is located in the sliding slot 311, and two side surfaces of the boss 321 are respectively in blocking contact with two side slot walls of the sliding slot 311. The top of the base 32 is provided with a handle 34 which can drive the screw rod to rotate. The first screw rod component 3 is equivalent to a base and used for bearing the second screw rod component 4, the third screw rod component 5 and the cutter component 2, the base 32 enables the first slider 31 to slide up and down more stably through the matching of the boss 321 and the sliding groove 311, the first slider 31 and the first screw rod 33 are fixedly connected through threads of the first screw rod 33 and drive the first slider 31 to slide up and down, the second screw rod component 4 and lifting of parts on the second screw rod component 4 are driven by utilizing the principle of the screw rod, the position of the cutter component 2 is conveniently adjusted through the design, the cutter component 2 can process workpieces of various sizes, and the adaptability is further improved. The boss 321 is an inverted trapezoidal structure, the width of the boss is gradually increased from one side close to the base 32 to one side far away from the base 32, the sliding groove 311 matched with the boss 321 is formed in the first sliding block 31, two side faces of the boss 321 in the structure can resist against two side groove walls of the sliding groove 311, the boss 321 is tightly matched with the first sliding block 31 together, the stability of the first sliding block 31 in the sliding process is good, the contact area of the boss 321 and the first sliding block 31 is large, the bearing of the first sliding block 31 can be better detached on the base 32, and the connection strength is high. The first screw rod component 3 of the design manually adjusts the height of the cutter by rotating the handle 34, so that the design is equivalent to adjusting the initial height of the cutter component 2, the cutter component 2 is adaptive to workpieces with larger volumes, and the adaptability is better.
The second lead screw component 4 comprises a second back plate 42 and a second lead screw 43, the second back plate 42 is fixed on the first sliding block 31, the second lead screw 43 is vertically arranged and axially fixed on the second back plate 42, the second sliding block 41 is in threaded connection with the second lead screw 43, linear guide rails 44 parallel to the lead screw are arranged on the second back plate 42 and located on two sides of the lead screw, a first moving block 441 capable of sliding along the linear guide rails is arranged on the linear guide rails 44, two ends of the second sliding block 41 are respectively fixed with the first moving block 441, and the third lead screw component 5 is fixed on the second sliding block 41 and can slide along with the second sliding block 41. The first servo motor 45 is fixed on the second back plate 42, the second screw rod 43 is fixed with an output shaft of the servo motor, and the second screw rod 43 is driven to rotate by the servo motor. The second screw rod component 4 controls the second sliding block 41 to move up and down through the second screw rod 43, two groups of linear guide rails 44 are arranged on two sides of the second screw rod 43, the third screw rod component 5 is fixed on the second sliding block 41, and the design ensures that the second sliding block 41 drives the third screw rod component 5 to move up and down, and meanwhile, the moving space of the cutter component 2 fixed on the third screw rod component 5 in the vertical direction is larger, and the adaptability is further improved. The second screw rod component 4 drives the second screw rod 43 to rotate through the servo motor, the second screw rod component 4 mainly has the effects that the cutter component 2 can move up and down during processing, the second screw rod 43 is driven by the motor to rotate so as to enable the second slide block 41 to rotate, and only the positive rotation and the negative rotation of the servo motor need to be controlled, so that the operation is very convenient.
The third screw rod assembly 5 comprises a back plate third 52 and a screw rod third 53, two ends of the back plate third 52 are respectively fixed with a first moving block 441, the middle of the back plate third 52 is fixed with a second sliding block 41, the screw rod third 53 is horizontally arranged and axially fixed on the back plate third 52, two sides of the screw rod third 53 are respectively provided with a second linear guide rail 54, the second linear guide rails 54 are respectively provided with a second moving block 541 capable of sliding along the second linear guide rail 54, the third sliding block 51 is in threaded connection with the screw rod third 53, a back plate first 55 is fixed on the third sliding block 51, two ends of the back plate first 55 are respectively fixed with the two second moving blocks 541, the middle of the back plate first 55 is fixed with the third sliding block 51, and the cutter assembly 2 is respectively fixed on the back plate first 55. A second servo motor 56 is fixed on the third back plate 52, and one end of the third screw 53 is fixed with an output shaft of the second servo motor 56 and can be driven to rotate by the second servo motor 56. The third screw rod assembly 5 is mainly used for adjusting the position of the cutter in the horizontal direction, the position is adjusted through the third screw rod 53, the two sides of the third screw rod 53 are provided with the second linear guide rails 54, the designed effect is basically the same as that of the second linear guide rails 54 on the second screw rod assembly 4, the machining range of the cutter is wider on the basis of ensuring the motion stability of the cutter, and the adaptability is further improved. The third screw rod component 5 is driven by the second servo motor 56 to enable the cutter component 2 to horizontally move, and the design and the operation are simple, and the use is very convenient.
The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Claims (10)

1. An upright drilling machine comprises a workbench (1) and at least one cutter assembly (2), it is characterized in that the vertical drilling machine also comprises a first screw rod component (3), a second screw rod component (4) and a third screw rod component (5), the first screw rod component (3) is fixed on the workbench (1), a first sliding block (31) capable of sliding along the vertical direction is arranged on the first screw rod component (3), the second screw rod component (4) is fixed on the first sliding block (31), the second screw rod component (4) is provided with a second sliding block (41) capable of sliding along the vertical direction, the third screw rod component (5) is fixed on the second sliding block (41), the third screw rod component (5) is provided with a third sliding block (51) which can slide along the horizontal direction, cutter unit (2) all fix on slider three (51), it is equipped with anchor clamps (6) to lie in cutter unit (2) below on workstation (1).
2. The vertical drilling machine according to claim 1, wherein the first screw rod assembly (3) comprises a base (32) and a first screw rod (33), a raised boss (321) is arranged on the side of the base (32), a stroke groove (322) is arranged on the boss (321), the first screw rod (33) is vertically arranged in the stroke groove (322), a sliding groove (311) matched with the boss (321) is formed in the first sliding block (31), the boss (321) is embedded in the sliding groove (311), and the first sliding block (31) is in threaded connection with the first screw rod (33).
3. The vertical drilling machine according to claim 2, wherein the width of the boss (321) increases with the increase of the height of the protrusion, the width of the sliding slot (311) increases with the increase of the depth of the sliding slot (311), the boss (321) is positioned in the sliding slot (311), and two side surfaces of the boss (321) are respectively abutted with two side slot walls of the sliding slot (311).
4. An upright drill press according to claim 3, characterized in that the top of the base (32) is provided with a handle (34) which can rotate the first screw (33).
5. The vertical drilling machine according to claim 4, wherein the second lead screw assembly (4) comprises a second back plate (42) and a second lead screw (43), the second back plate (42) is fixed on the first slide block (31), the second lead screw (43) is vertically arranged and axially fixed on the second back plate (42), the second slide block (41) is in threaded connection with the second lead screw (43), linear guide rails (44) parallel to the second lead screw (43) are arranged on the second back plate (42) and located on two sides of the second lead screw (43), moving blocks (441) capable of sliding along the linear guide rails are arranged on the linear guide rails (44), two ends of the second slide block (41) are respectively fixed with the two moving blocks (441), and the third lead screw assembly (5) is fixed on the second slide block (41).
6. The vertical drilling machine according to claim 5, wherein a first servo motor (45) is fixed on the second back plate (42), the second screw rod (43) is fixed with an output shaft of the first servo motor (45), and the second screw rod (43) is driven to rotate by the first servo motor (45).
7. Upright drilling machine according to claim 6, wherein said third screw assembly (5) comprises a back plate three (52) and a screw three (53), the back plate III (52) is fixed with the slide block II (41), the screw rod III (53) is horizontally arranged and axially fixed on the back plate III (52), two sides of the third screw rod (53) are respectively provided with a second linear guide rail (54), the second linear guide rails (54) are respectively provided with a second moving block (541) capable of sliding along the second linear guide rails (54), the third sliding block (51) is in threaded connection with the third screw rod (53), a first back plate (55) is fixed on the third sliding block (51), two ends of the first back plate (55) are respectively fixed with two moving blocks (541), the middle part of the first back plate (55) is fixed with the third sliding block (51), and the cutter assemblies (2) are fixed on the first back plate (55).
8. The vertical drilling machine according to claim 7, wherein a second servo motor (56) is fixed on the third back plate (52), and one end of the third screw rod (53) is fixed with an output shaft of the second servo motor (56) and can be driven to rotate by the second servo motor (56).
9. Vertical drilling machine according to any one of claims 1 to 8, characterized in that the tool assembly (2) has two sets, respectively a drill head (21) and a chamfering head (22), the drill head (21) and the chamfering head (22) being driven in rotation by an electric motor.
10. An upright drill press according to claim 9, characterized in that the clamp (6) is a three-jaw chuck or an internal expanding clamp.
CN202123073219.9U 2021-12-08 2021-12-08 Vertical drilling machine Active CN216371011U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202123073219.9U CN216371011U (en) 2021-12-08 2021-12-08 Vertical drilling machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202123073219.9U CN216371011U (en) 2021-12-08 2021-12-08 Vertical drilling machine

Publications (1)

Publication Number Publication Date
CN216371011U true CN216371011U (en) 2022-04-26

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ID=81221765

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202123073219.9U Active CN216371011U (en) 2021-12-08 2021-12-08 Vertical drilling machine

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CN (1) CN216371011U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115415841A (en) * 2022-08-12 2022-12-02 丁茂林 Combined tool set drilling machine and using method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115415841A (en) * 2022-08-12 2022-12-02 丁茂林 Combined tool set drilling machine and using method thereof

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