CN108673193B - Drilling device and drilling method special for mechanical manufacturing - Google Patents
Drilling device and drilling method special for mechanical manufacturing Download PDFInfo
- Publication number
- CN108673193B CN108673193B CN201810806644.8A CN201810806644A CN108673193B CN 108673193 B CN108673193 B CN 108673193B CN 201810806644 A CN201810806644 A CN 201810806644A CN 108673193 B CN108673193 B CN 108673193B
- Authority
- CN
- China
- Prior art keywords
- gear
- plate
- upright post
- drill bit
- pressing plate
- 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.)
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- 238000005553 drilling Methods 0.000 title claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000003825 pressing Methods 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012479 in-house spinning solution Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
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
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
-
- 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
- B23Q1/01—Frames, beds, pillars or like members; Arrangement of ways
-
- 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
- B23Q1/01—Frames, beds, pillars or like members; Arrangement of ways
- B23Q1/015—Frames, beds, pillars
-
- 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
-
- 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
- B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
- B23Q15/20—Automatic control or regulation of feed movement, cutting velocity or position of tool or work before or after the tool acts upon the workpiece
- B23Q15/22—Control or regulation of position of tool or workpiece
- B23Q15/24—Control or regulation of position of tool or workpiece of linear position
Abstract
The invention discloses a special drilling device and a drilling method for machine manufacturing, wherein the special drilling device comprises a base, a second rotating shaft and an operating platform, a left upright post and a right upright post are respectively arranged on two sides above the base, grooves are formed in the left upright post and the right upright post, a transverse plate is arranged at the top of the left upright post and the right upright post, a fixing plate is fixed at the left end of the transverse plate, a rack is arranged on the front side of the fixing plate, a first gear is connected with the front side of the rack in a meshed manner, a motor is arranged above the transverse plate, a screw rod is arranged on the inner wall of the third gear, a sleeve rod is arranged on the outer side of the screw rod, a pressing plate is connected to the bottom of the sleeve rod, and the base is arranged at the bottom of the operating platform. This special drilling equipment of machine-building is provided with the loop bar, and the bottom of loop bar bonds there is the gasket to loop bar and lead screw threaded connection, when the lead screw rotates, can make loop bar and gasket move down together to make the gasket press down fixedly to spare part.
Description
Technical Field
The invention relates to the technical field of mechanical manufacturing, in particular to a drilling device and a drilling method special for mechanical manufacturing.
Background
The mechanical manufacturing refers to the industrial sector engaged in the production of various power mechanical devices, along with the development of scientific technology, more and more mechanical devices are in industrial production, some parts of the mechanical devices need to be drilled during processing, and the types of drilling devices in the market are many, but there are some disadvantages, such as difficulty in fixing the parts during drilling, inconvenience in adjusting the height of a drill bit, and incapability of drilling parts with different heights, thus reducing the use efficiency of the drilling devices, so we propose a drilling device special for mechanical manufacturing, so as to solve the problems set forth in the foregoing.
Disclosure of Invention
The invention aims to provide a drilling device and a drilling method special for machine manufacturing, which are used for solving the problems that the prior drilling device in the market is not easy to fix parts during drilling and is inconvenient to adjust the height of a drill bit, so that parts with different heights cannot be drilled, and the use efficiency of the drilling device is reduced.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a special drilling equipment of machinery manufacture, includes base, second pivot and operation panel, left stand and right stand are installed respectively to the top both sides of base, and the inside of left stand and right stand all is provided with the recess, the top of left stand and right stand is provided with the diaphragm, and the left end of diaphragm is fixed with the fixed plate, the front side of fixed plate is provided with the rack, and the front side meshing of rack is connected with first gear, the inner wall of first gear is fixed with first pivot, and installs the handle in the left end of first pivot, the bottom of fixed plate is provided with the stopper, the motor is installed to the top of diaphragm, the second pivot runs through the diaphragm and is connected with the motor, and the drill bit is installed to the bottom of second pivot, the outer wall of second pivot is fixed with the second gear, and the left and right sides of second gear all mesh is connected with the third gear, the lead screw is installed to the inner wall of third gear, and the outside of lead screw is provided with the loop bar, the bottom of loop bar is connected with the clamp plate, the left side of loop bar is connected with the bottom of base through with the left side of stand.
Preferably, the inside of left stand is hollow form structure, and left stand and right stand and diaphragm's connected mode are swing joint.
Preferably, the fixing plate and the transverse plate are welded, and the right end of the transverse plate is T-shaped.
Preferably, two third gears are arranged, 2 third gears are welded with the screw rod, and the screw rod is in bearing connection with the transverse plate.
Preferably, the loop bar is connected with the screw bar in a threaded manner, and the loop bar forms a lifting structure with the left upright post and the right upright post through the pull rod.
Preferably, the connection mode of the pressing plate and the sleeve rod is bonding, the lowest point of the pressing plate is slightly lower than the lowest point of the drill bit, and the pressing plate is made of elastic rubber.
Compared with the prior art, the invention has the beneficial effects that: the drilling device special for the mechanical manufacture comprises a drilling device,
(1) The sleeve rod is arranged, the gasket is adhered to the bottom of the sleeve rod, the sleeve rod is in threaded connection with the screw rod, and when the screw rod rotates, the sleeve rod and the gasket move downwards together, so that the gasket presses and fixes parts;
(2) The front side of the fixed plate is provided with a rack, the rack is meshed with the first gear, and when the first gear rotates along with the first rotating shaft, the fixed plate can be made to go up and down, so that the height of the transverse plate at the top of the fixed plate is adjusted, the height of the drill bit is adjusted, and the drill bit is applicable to machining of more parts;
(3) The right end of the cross plate and the pull rod form a sliding structure through the groove and the right upright post, so that the cross plate and the loop bar can move more stably, and the stability of the device is further ensured.
Drawings
FIG. 1 is a schematic diagram of a front view structure of the present invention;
FIG. 2 is a schematic view of the inner structure of the left column of the present invention;
FIG. 3 is a schematic view of the connection structure of the cross plate and the right column.
In the figure: 1. a base; 2. a left upright post; 3. a right column; 4. a groove; 5. a cross plate; 6. a fixing plate; 7. a rack; 8. a first gear; 9. a first rotating shaft; 10. a handle; 11. a limiting block; 12. a motor; 13. a second rotating shaft; 14. a drill bit; 15. a second gear; 16. a third gear; 17. a screw rod; 18. a loop bar; 19. a pressing plate; 20. a pull rod; 21. an operating table.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-3, the present invention provides a technical solution: the special drilling device for machine manufacturing comprises a base 1, a left upright post 2, a right upright post 3, a groove 4, a transverse plate 5, a fixed plate 6, a rack 7, a first gear 8, a first rotating shaft 9, a handle 10, a limiting block 11, a motor 12, a second rotating shaft 13, a drill bit 14, a second gear 15, a third gear 16, a screw rod 17, a sleeve rod 18, a pressing plate 19, a pull rod 20 and an operating table 21, wherein the left upright post 2 and the right upright post 3 are respectively arranged on two sides above the base 1, the grooves 4 are respectively arranged in the left upright post 2 and the right upright post 3, the left upright post 2 is of a hollow structure, the left upright post 2 is movably connected with the right upright post 3 and the transverse plate 5, the height of the transverse plate 5 is conveniently adjusted, the transverse plate 5 is arranged at the top of the left upright post 2 and the right upright post 3, the fixed plate 6 is fixedly arranged at the left end of the transverse plate 5, the connection mode of the fixed plate 6 and the transverse plate 5 is welding, the right end of the transverse plate 5 is T-shaped, the connection stability between the fixed plate 6 and the transverse plate 5 is ensured, simultaneously, when the transverse plate 5 moves, the transverse plate 5 can move more stably, the stability of the device is further ensured, the front side of the fixed plate 6 is provided with a rack 7, the front side of the rack 7 is in meshed connection with a first gear 8, the inner wall of the first gear 8 is fixedly provided with a first rotating shaft 9, the left end of the first rotating shaft 9 is provided with a handle 10, the bottom of the fixed plate 6 is provided with a limiting block 11, a motor 12 is arranged above the transverse plate 5, a second rotating shaft 13 penetrates through the transverse plate 5 to be connected with the motor 12, a drill bit 14 is arranged at the bottom of the second rotating shaft 13, the outer wall of the second rotating shaft 13 is fixedly provided with a second gear 15, the left side and the right side of the second gear 15 are in meshed connection with a third gear 16, the third gears 16 are arranged in two, the 2 third gears 16 are in welded connection with the screw rod 17, and the screw rod 17 is in bearing connection with the transverse plate 5, so that the third gears 16 are more firmly connected with the screw rod 17, and the screw rod 17 can be prevented from falling.
The lead screw 17 is installed to the inner wall of third gear 16, and the outside of lead screw 17 is provided with loop bar 18, loop bar 18 and the connected mode of lead screw 17 are threaded connection, and loop bar 18 passes through pull rod 20 and constitutes elevation structure with left stand 2 and right stand 3 respectively, when lead screw 17 rotates, can drive loop bar 18 and reciprocate, the stability of loop bar 18 removal has been guaranteed simultaneously, the bottom of loop bar 18 is connected with clamp plate 19, the connected mode of clamp plate 19 and loop bar 18 is the bonding, and the minimum of clamp plate 19 is less than the minimum of drill bit 14, and clamp plate 19 is elastic rubber material, when loop bar 18 descends, can drive clamp plate 19 together decline, thereby make clamp plate 19 press down fixedly to spare part, do not influence the normal use of drill bit 14 simultaneously, the left side of loop bar 18 is connected with left stand 2 through pull rod 20, base 1 is installed to the bottom of operation panel 21.
Working principle: when the special drilling device for machine manufacturing is used, firstly, a worker puts the device at a corresponding position, fixes the base 1, then places parts needing to be drilled on the operation table 21, and then rotates the handle 10 anticlockwise, so that the handle 10 drives the first rotating shaft 9 and the first gear 8 to rotate anticlockwise, the first gear 8 is meshed with the rack 7 on the fixed plate 6, so that when the first gear 8 rotates anticlockwise, the rack 7 can move downwards along with the fixed plate 6, the fixed plate 6 is welded with the transverse plate 5, a drill bit 14 and a pressing plate 19 are arranged below the transverse plate 5, the drill bit 14 and the pressing plate 19 descend along with the transverse plate 5, and the lowest point of the pressing plate 19 is slightly lower than the lowest point of the drill bit 14, so that when the pressing plate 19 descends to a proper position, the worker stops rotating the handle 10.
Then, the motor 12 is started by an external power supply (the motor 12 is a positive and negative motor, the model of the motor 12 is IHSS 57-36-20), the motor 12 can drive the second rotating shaft 13 to rotate, the second rotating shaft 13 drives the drill bit 14 to rotate, the second gear 15 is welded on the outer wall of the second rotating shaft 13, and the left side and the right side of the second gear 15 are both meshed with the third gear 16, so that when the second gear 15 rotates, 2 third gears 16 can rotate, the inner wall of the third gear 16 is welded with a lead screw 17, the lead screw 17 is in threaded connection with a sleeve rod 18, so that when the lead screw 17 rotates, the sleeve rod 18 moves downwards, a pressing plate 19 at the bottom of the sleeve rod 18 also moves downwards, at the moment, a worker rotates the handle 10 anticlockwise again, so that the drill bit 14 rotates and descends while the pressing plate 19 is made of elastic rubber material, the drilling work of the drill bit 14 is not influenced, and parts are pressed tightly, after the drilling, the end, the worker rotates the pressing plate 10 clockwise, the pressing plate 19 and the sleeve rod 18 are further guaranteed to move clockwise, the pressing plate 14 and the sleeve rod 18 are moved upwards, the lifting plate 5 and the lifting plate 5 are not convenient to move along with the lifting device, the lifting device is a well-known in the technical field, the technical description, the lifting device is convenient for the lifting device is a lateral plate, and the lifting device is a device is used in the field and a device, and a device is used in the lifting and a technical field, and is well-known in the field, and a device.
Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.
Claims (2)
1. The utility model provides a special drilling equipment of machinery manufacturing, includes base (1), second pivot (13) and operation panel (21), its characterized in that: left stand (2) and right stand (3) are installed respectively to the top both sides of base (1), and the inside of left stand (2) and right stand (3) all is provided with recess (4), the top of left stand (2) and right stand (3) is provided with diaphragm (5), and the left end of diaphragm (5) is fixed with fixed plate (6), the front side of fixed plate (6) is provided with rack (7), and the front side meshing of rack (7) is connected with first gear (8), the inner wall of first gear (8) is fixed with first pivot (9), and handle (10) are installed to the left end of first pivot (9), the bottom of fixed plate (6) is provided with stopper (11), motor (12) are installed to the top of diaphragm (5), second pivot (13) run through diaphragm (5) and motor (12) and are connected, and drill bit (14) are installed to the bottom of second pivot (13), the outer wall of second pivot (13) is fixed with rack (15), and second gear (16) are connected with first gear (17) and the inner wall (17) of second pivot (16), and screw (17) are all connected with screw rod (17), the bottom of the loop bar (18) is connected with a pressing plate (19), the left side of the loop bar (18) is connected with a left upright post (2) through a pull rod (20), a base (1) is installed at the bottom of an operation table (21), the inside of the left upright post (2) is of a hollow structure, the left upright post (2) is movably connected with a right upright post (3) and a transverse plate (5), the fixed plate (6) is welded with the transverse plate (5), and the right end of the transverse plate (5) is in a T shape;
the number of the third gears (16) is two, the 2 third gears (16) are connected with the screw rod (17) in a welding way, and the screw rod (17) is connected with the transverse plate (5) in a bearing way;
the sleeve rod (18) is in threaded connection with the screw rod (17), and the sleeve rod (18) forms a lifting structure with the left upright post (2) and the right upright post (3) through the pull rod (20);
the pressing plate (19) is connected with the loop bar (18) in an adhesive mode, the lowest point of the pressing plate (19) is slightly lower than the lowest point of the drill bit (14), and the pressing plate (19) is made of elastic rubber.
2. A drilling method based on the special drilling device for machine-building according to claim 1, characterized in that: the specific drilling method comprises the following steps: firstly, a worker puts the device at a corresponding position, fixes the base (1), then puts parts needing to be drilled on the operation table (21), and then rotates the handle (10) anticlockwise, so that the handle (10) drives the first rotating shaft (9) and the first gear (8) to rotate anticlockwise, and the first gear (8) is meshed with the rack (7) on the fixed plate (6), so that when the first gear (8) rotates anticlockwise, the rack (7) and the fixed plate (6) move downwards together, the fixed plate (6) is connected with the transverse plate (5) in a welding way, a drill bit (14) and a pressing plate (19) are arranged below the transverse plate (5), so that the drill bit (14) and the pressing plate (19) can descend together with the transverse plate (5), and the lowest point of the pressing plate (19) is slightly lower than the lowest point of the drill bit (14), and therefore, when the pressing plate (19) descends to a proper position, the worker stops rotating the handle (10);
then, the motor (12) is started by an external power supply, the motor (12) can drive the second rotating shaft (13) to rotate, then the second rotating shaft (13) drives the drill bit (14) to rotate, a second gear (15) is welded on the outer wall of the second rotating shaft (13), and third gears (16) are connected to the left side and the right side of the second gear (15) in a meshed mode, so that when the second gear (15) rotates, 2 third gears (16) can rotate, the inner wall of the third gear (16) is welded with a screw rod (17), the screw rod (17) is in threaded connection with a sleeve rod (18), so that when the screw rod (17) rotates, the sleeve rod (18) moves downwards, a pressing plate (19) at the bottom of the sleeve rod (18) also moves downwards, at the moment, a worker rotates the handle (10) anticlockwise again, the drill bit (14) descends while rotating, and the pressing plate (19) is made of elastic rubber material, therefore, the drilling work of the drill bit (14) cannot be influenced, parts can be pressed tightly, the device is further ensured, after the drilling device is used, the worker (14) normally moves the drill bit (18) and the drill bit (18) in the normal process, and the normal process is moved upwards, and the drill rod (18) is moved downwards, the right end of the transverse plate (5) and the pull rod (20) slide along the groove (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810806644.8A CN108673193B (en) | 2018-07-20 | 2018-07-20 | Drilling device and drilling method special for mechanical manufacturing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810806644.8A CN108673193B (en) | 2018-07-20 | 2018-07-20 | Drilling device and drilling method special for mechanical manufacturing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108673193A CN108673193A (en) | 2018-10-19 |
| CN108673193B true CN108673193B (en) | 2023-12-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810806644.8A Active CN108673193B (en) | 2018-07-20 | 2018-07-20 | Drilling device and drilling method special for mechanical manufacturing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108673193B (en) |
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| CN109519122A (en) * | 2018-12-26 | 2019-03-26 | 国网河南鄢陵县供电公司 | A kind of electric pole cultivation bar device of digging a hole |
| CN109623002B (en) * | 2019-02-14 | 2020-08-07 | 徐州诚凯知识产权服务有限公司 | Iron plate drilling equipment for machine-building |
| CN110666213A (en) * | 2019-10-30 | 2020-01-10 | 苏州赛硕拉不锈钢制品有限公司 | Punching device for processing refined steel |
| CN110947994A (en) * | 2020-01-02 | 2020-04-03 | 徐勇 | Special drilling equipment of machine-building |
| CN112475386A (en) * | 2020-11-23 | 2021-03-12 | 湖州琦利智能装备科技有限公司 | Plate type mechanical accessory machining platform |
| CN115217021A (en) * | 2022-07-22 | 2022-10-21 | 中建交通建设集团有限公司 | Construction method for ramp slotting and support type water mill drilling machine |
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| CN107962249A (en) * | 2017-11-29 | 2018-04-27 | 宁波润佳汽车安全系统有限公司 | A kind of cutter device with uniform squeeze function |
| CN207495651U (en) * | 2017-11-23 | 2018-06-15 | 广州市意点纸制品有限公司 | A kind of perforating press for paper product processing |
| CN108161053A (en) * | 2018-02-22 | 2018-06-15 | 德清宏晨铸造有限公司 | A kind of steel plate drilling equipment |
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| JPH08174281A (en) * | 1994-12-26 | 1996-07-09 | Chuo Giken:Kk | Mechanism for taking out and pressing reinforcement to be used in device for manufacturing large steel structure |
| CN105834471A (en) * | 2016-04-29 | 2016-08-10 | 无锡港盛重型装备有限公司 | Drilling machine for hardware machining |
| CN106393263A (en) * | 2016-10-28 | 2017-02-15 | 无锡龙翔印业有限公司 | Perforating device for presswork stapling |
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| CN108161053A (en) * | 2018-02-22 | 2018-06-15 | 德清宏晨铸造有限公司 | A kind of steel plate drilling equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108673193A (en) | 2018-10-19 |
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