CN108213484A - A kind of numerical control processing apparatus - Google Patents
A kind of numerical control processing apparatus Download PDFInfo
- Publication number
- CN108213484A CN108213484A CN201810117745.4A CN201810117745A CN108213484A CN 108213484 A CN108213484 A CN 108213484A CN 201810117745 A CN201810117745 A CN 201810117745A CN 108213484 A CN108213484 A CN 108213484A
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- Prior art keywords
- space
- hydraulic
- numerical control
- plate
- hole
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B39/00—General-purpose boring or drilling machines or devices; Sets of boring and/or drilling machines
- B23B39/006—Portal drilling machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B47/00—Constructional features of components specially designed for boring or drilling machines; Accessories therefor
- B23B47/26—Liftable or lowerable drill heads or headstocks; Balancing arrangements therefor
Abstract
The invention discloses a kind of numerical control processing apparatus, including firm banking and numerical control housing, the numerical control housing is internally provided with a working space, the center position of the working space lower end wall is provided with a workbench, the lower face of the horizontal slide is provided with the T shape sliding grooves of a horizontal direction, a T shape link blocks are provided in the sliding groove, the lower end of the T shapes link block passes through T shapes sliding groove and is fixedly connected with hydraulic lift, and the lower end of the elevating lever passes through sealing rubber ring and is fixedly connected with a drilling equipment.In present invention work, by on the basis of central shaft, the error that can reduce in process is positioned by distance and angle, the accuracy of position degree is improved, and when being processed on annular surface, it is only necessary to rotate, not needing to twin shaft cooperation can complete to process, time and cost are saved, the effect being sealed using the gasket seal on the outside of hydraulic plate, and also guide pad and guide rail cooperation prevent rotating freely for hydraulic plate.
Description
Technical field
The present invention relates to digital control processing field, specially a kind of numerical control processing apparatus.
Background technology
At present, digital control processing is common processing method in mechanical processing, but this technique that drills also generally is using
Artificial fixes workpiece by workbench, then completes to drill by controlling the height of electric drill head manually, efficiency pole
Low, accuracy is very poor, and labor intensity is big, in the market there is also some digital control hole drilling equipment, but is all multiaxis screw control
System, accuracy is relatively low, and the punch position that efficiency needs also than relatively low, and at present in a large amount of workpiece process is in annulus
It is upper equally distributed, often make a hole will X-axis, Y-axis move together, error is big, and wastes time.
Invention content
The purpose of the present invention is to provide a kind of numerical control processing apparatus, to solve the problems mentioned in the above background technology.
To achieve the above object, the present invention provides following technical solution：A kind of numerical control processing apparatus, including firm banking and
Numerical control housing, the numerical control housing are fixed on the upper end of firm banking, a PLC are inlaid on the left of the numerical control housing forward end face
Control panel, the PLC control panels are used to control the start and stop of electric elements inside the device, and the numerical control housing is internally provided with
One working space is provided with a push-and-pull protective door, the centre bit of the working space lower end wall on the working space front bulkhead
The place of putting is provided with a workbench, and the center position of the working space upper end wall is provided with a revolution space, and the rotation is empty
Between lower end wall center position be provided with one in through-hole, the middle through-hole connection revolution space and working space, the rotation
The center position of space upper end wall is fixedly connected with a servo motor, the servo motor by the motor mandrel of its lower end with
Bearing plate is sequentially connected, and the center position of the bearing plate lower face is fixedly connected with a rotary shaft, under the rotary shaft
End is fixedly connected across middle through-hole and with horizontal slide, and the center of the horizontal slide lower face is provided with a horizontal direction
T shape sliding grooves, a bearing groove is provided on the front bulkhead of the T shapes sliding groove, is set in the aft bulkhead of the T shapes sliding groove
Dynamic space, the center position of power space front bulkhead are provided with a bearing hole, and the bearing hole connects sliding groove
With power space, an electric rotating machine is fixed on the aft bulkhead in the power space, a screw, institute are provided in the sliding groove
The front end for stating screw is located in bearing groove, and the rear end of the screw passes through bearing hole and is sequentially connected with electric rotating machine, the cunning
A T shape link blocks are provided in dynamic slot, by its internal screw thread borehole jack on screw, the T shapes connect the T shapes link block
The lower end for connecing block passes through T shapes sliding groove and is fixedly connected with hydraulic lift, and the hydraulic lift includes hydraulic pressure shell,
The hydraulic pressure enclosure is provided with a hydraulic space, and the hydraulic space is internally provided with a hydraulic plate, the hydraulic space
The upper and lower ends of front bulkhead are respectively arranged with the end difference of connecting tube and lower connecting tube, the upper connecting tube and lower connecting tube
The upper and lower ends of two-way pump are connected, the two-way pump is fixedly connected on the front end face of hydraulic pressure shell by the spill block of rear side
On, the inside of the upper connecting tube and lower connecting tube is respectively arranged with connecting hole and lower connecting hole, the upper connecting hole connection
The hydraulic space of two-way pump and the hydraulic space of hydraulic plate upper end, the lower connecting hole connection two-way pump and hydraulic plate lower end, institute
It states and a solenoid valve is both provided in connecting hole and lower connecting hole, the lower end of the hydraulic space is provided with a sealing lift span,
Equipped with a sealing rubber ring in the sealing lift span, the upper end of the hydraulic plate cylindroid is provided with a seal groove, described close
A gasket seal is set in sealing groove, guide groove, the guide groove are symmetrically arranged with before and after the lower end of the hydraulic plate cylindroid
It is interior equipped with guide pad, be provided with leading for vertical direction at position corresponding with guide pad on the wall of the hydraulic space rear and front end
Rail, an elevating lever is fixedly connected at the center of the hydraulic plate lower face, and the lower end of the elevating lever passes through sealing rubber ring
And it is fixedly connected with a drilling equipment.
Preferably, the diameter of the hydraulic space upper and lower ends is both less than the diameter of hydraulic plate.
Preferably, the drilling equipment includes fixed shell, the fixed shell is internally provided with a transmission space, institute
The center position for stating transmission space lower end wall is provided with a rotation hole, the rotation hole connection transmission space and free surrounding space,
The center position of the transmission space upper end wall is fixed with a high-speed electric expreess locomotive, and the high-speed electric expreess locomotive lower end is sequentially connected with a biography
Moving axis, the lower end of the transmission shaft are fixedly connected with a fixation swivel plate, and the fixed swivel plate upper end is provided with an annular
Limiting plate, the annular stop plate are fixedly connected with the cylindrical inner wall of transmission space, the center of the fixed swivel plate lower face
Connecting rod is fixedly connected at position, the lower end of the connecting rod passes through rotation hole and is fixedly connected with a drill holder.
Compared with prior art, the beneficial effects of the invention are as follows：In present invention work, push-and-pull protective door is opened, by workpiece
It is fixed that for required bore position, programming processing can be completed by PLC control panels on the table, during work, drilling equipment
Positioned at the surface of workpiece centre, according to the distance of required bore position distance center point, electric rotating machine work passes through screw
Rotation drives T shapes link block forward or moves backward, wherein, T shape sliding grooves limit the rotation of T shape link blocks, further according to
The angle of required drilling, servo motor work drive bearing plate to rotate by motor mandrel, required so as to be located at drilling equipment
The surface of bore position, by that on the basis of central shaft, can be reduced in process to position by distance and angle
Error improves the accuracy of position degree, and when being processed on annular surface, it is only necessary to rotate, not need to twin shaft cooperation
Processing is completed, saves time and cost, during drilling, solenoid valve is opened, and two-way pump extracts the liquid of hydraulic plate lower end and by liquid
It is input in the hydraulic space of hydraulic plate upper end, so as to which drilling equipment be controlled to move down, utilizes the gasket on the outside of hydraulic plate
The effect that piece is sealed, and hydraulic plate is enabled to be moved in the case that non-rotary so that hydraulic plate plate by
The effect of smaller frictional force reduces its loss, and guide pad and guide rail cooperation prevent rotating freely for hydraulic plate, together
When, drilling bit high-speed rotary is driven by high-speed electric expreess locomotive, transmission shaft plays the role of support and drives rotation, so as to complete drilling
Auxiliary support is played the role of in work, annular stop plate and the cooperation of fixed swivel plate, prevents stress is excessive from being made to high-speed electric expreess locomotive
Into damage.
Description of the drawings
Fig. 1 is a kind of left view structural representation of the whole complete section of numerical control processing apparatus of the present invention；
Fig. 2 is a kind of forward sight structure diagram of numerical control processing apparatus entirety of the present invention；
Fig. 3 is the forward sight structure diagram of horizontal slide complete section in a kind of numerical control processing apparatus of the present invention；
Fig. 4 is the left view structural representation of hydraulic lift complete section in a kind of numerical control processing apparatus of the present invention；
Fig. 5 is the left view structural representation of drilling equipment complete section in a kind of numerical control processing apparatus of the present invention.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig.1-Fig. 5, a kind of embodiment provided by the invention：A kind of numerical control processing apparatus, including 1 He of firm banking
Numerical control housing 2, the numerical control housing 2 are fixed on the upper end of firm banking 1, are inlaid on the left of 2 front end face of numerical control housing
One PLC control panels 3, the PLC control panels 3 are used to control the start and stop of electric elements inside the device, the numerical control housing 2 it is interior
Portion is provided with a working space 4, is provided with a push-and-pull protective door 5 on 4 front bulkhead of working space, under the working space 4
The center position of end wall is provided with a workbench 6, and the center position of 4 upper end wall of working space is provided with rotation sky
Between 7, through-hole 8 during the center position of 7 lower end wall of revolution space is provided with one, the middle through-hole 8 connects 7 He of revolution space
Working space 4, the center position of 7 upper end wall of revolution space are fixedly connected with a servo motor 9, the servo motor 9
It is sequentially connected by the motor mandrel 10 and bearing plate 11 of its lower end, the center position of 11 lower face of bearing plate, which is fixed, to be connected
A rotary shaft 12 is connected to, the lower end of the rotary shaft 12 passes through middle through-hole 8 and is fixedly connected with horizontal slide 13, described horizontal sliding
The center of 13 lower face of road is provided with the T shapes sliding groove 14 of a horizontal direction, is set on the front bulkhead of the T shapes sliding groove 14
A bearing groove 15 is equipped with, dynamic space 16,16 front bulkhead of power space are set in the aft bulkhead of the T shapes sliding groove 14
Center position be provided with a bearing hole 17, the bearing hole 17 connects sliding groove 14 and power space 16, and the power is empty
Between 16 aft bulkhead on be fixed with an electric rotating machine 18, a screw 19 is provided in the sliding groove 14, before the screw 19
End is located in bearing groove 15, and the rear end of the screw 19 passes through bearing hole 17 and is sequentially connected with electric rotating machine 18, the slip
A T shapes link block 20 is provided in slot 14, the T shapes link block 20 is sleeved on by its internal threaded hole 21 on screw 19,
The lower end of the T shapes link block 20 passes through T shapes sliding groove 14 and is fixedly connected with hydraulic lift 22, the hydraulic lifting dress
It puts 22 and includes hydraulic pressure shell 23, the hydraulic pressure shell 23 is internally provided with a hydraulic space 24, is set inside the hydraulic space 24
A hydraulic plate 25 is equipped with, the upper and lower ends of 24 front bulkhead of hydraulic space are respectively arranged with connecting tube 26 and lower connecting tube
27, the end of the upper connecting tube 26 and lower connecting tube 27 connects the upper and lower ends of two-way pump 28 respectively, and the two-way pump 28 is logical
The spill block 29 for crossing rear side is fixedly connected on the front end face of hydraulic pressure shell 23, the upper connecting tube 26 and lower connecting tube 27
Inside is respectively arranged with connecting hole 30 and lower connecting hole 31, and the upper connecting hole 30 connects 25 upper end of two-way pump 28 and hydraulic plate
Hydraulic space 24, the lower connecting hole 31 connects the hydraulic space 24 of 25 lower end of two-way pump 28 and hydraulic plate, the upper connection
A solenoid valve 32 is both provided in hole 30 and lower connecting hole 31, the lower end of the hydraulic space 24 is provided with a sealing lift span
33, the sealing lift span 33 is interior equipped with a sealing rubber ring 34, and the upper end of 25 cylindroid of hydraulic plate is provided with a sealing
Slot 35 is set with a gasket seal 36 in the seal groove 35, is symmetrically arranged with before and after the lower end of 25 cylindroid of hydraulic plate
Guide groove 37, it is corresponding with guide pad 38 on the 25 rear and front end wall of hydraulic space equipped with guide pad 38 in the guide groove 37
Position at be provided with the guide rail 39 of vertical direction, be fixedly connected with an elevating lever at the center of 25 lower face of hydraulic plate
40, the lower end of the elevating lever 40 passes through sealing rubber ring 34 and is fixedly connected with a drilling equipment 41.
Valuably or illustratively, wherein, the diameter of 24 upper and lower ends of hydraulic space is both less than the straight of hydraulic plate 25
Diameter, main function be, hydraulic plate 25 when being moved up and down under the action of hydraulic pressure, avoid hydraulic plate 25 block connecting hole 30 or
Lower connecting hole 31 ensures 22 normal operation of hydraulic lift.
Valuably or illustratively, wherein, the drilling equipment 41 includes fixed shell 411, inside the fixed shell
It is provided with a transmission space 412, the center position of 412 lower end wall of transmission space is provided with a rotation hole 413, described turn
Dynamic hole 413 connects transmission space 412 and free surrounding space, and it is high that the center position of 412 upper end wall of transmission space is fixed with one
Speed motor 414,414 lower end of high-speed electric expreess locomotive are sequentially connected with a transmission shaft 415, and the lower end of the transmission shaft 415, which is fixed, to be connected
A fixation swivel plate 416 is connected to, fixed 416 upper end of swivel plate is provided with an annular stop plate 417, the annular stop
Plate 417 is fixedly connected with the cylindrical inner wall of transmission space 412, and the center position of fixed 416 lower face of swivel plate is fixed
Connecting rod 418 is connected with, the lower end of the connecting rod 418 passes through rotation hole 413 and is fixedly connected with a drill holder 419,
Its main function is to drive drilling bit high-speed rotary by high-speed electric expreess locomotive 414, so as to complete boring work, transmission shaft 415 plays branch
Auxiliary support is played the role of in support and the effect for driving rotation, annular stop plate 417 and the cooperation of fixed swivel plate 416, prevents
Stress is excessive to destruction caused by high-speed electric expreess locomotive 414.
Specifically used mode：In present invention work, push-and-pull protective door 5 is opened, workpiece is fixed on workbench 6, for
Programming processing can be completed by PLC control panels in required bore position, and during work, drilling equipment 41 is being located at workpiece centre just
Top, according to the distance of required bore position distance center point, electric rotating machine 18 works, and T shapes are driven by the rotation of screw 19
Link block 20 forward or moves backward, wherein, T shapes sliding groove 14 limits the rotation of T shapes link block 20, further according to required brill
The angle in hole, servo motor 9 work, and bearing plate 11 are driven to rotate by motor mandrel 10, so as to which drilling equipment 41 be made to be located at institute
The surface of bore position is needed, by that on the basis of central shaft, can reduce in process to position by distance and angle
Error, improve the accuracy of position degree, and when being processed on annular surface, it is only necessary to rotate, not needing to twin shaft cooperation can
To complete processing, time and cost are saved, during drilling, solenoid valve 32 is opened, and two-way pump 28 extracts the liquid of 25 lower end of hydraulic plate
And be input to liquid in the hydraulic space 24 of 25 upper end of hydraulic plate, so as to which drilling equipment 41 be controlled to move down, utilize hydraulic pressure
The effect that the gasket seal 36 in 25 outside of plate is sealed, and hydraulic plate 25 is enabled to be moved in the case that non-rotary,
So that 25 plate of hydraulic plate is acted on by smaller frictional force, its loss is reduced, and guide pad 38 and guide rail 39 coordinate
Rotating freely for hydraulic plate 25 is prevented, meanwhile, drilling bit high-speed rotary is driven by high-speed electric expreess locomotive 414, transmission shaft 415 plays branch
Support and the effect for driving rotation, so as to complete the work of drilling, annular stop plate 417 and the cooperation of fixed swivel plate 416 are played
The effect of Auxiliary support prevents stress excessive and high-speed electric expreess locomotive 414 is damaged.
It is obvious to a person skilled in the art that the present invention is not limited to the details of above-mentioned exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requirement rather than above description limit, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims
Variation is included within the present invention.Any reference numeral in claim should not be considered as to the involved claim of limitation.
Claims (3)
1. a kind of numerical control processing apparatus, including firm banking and numerical control housing, it is characterised in that：The numerical control housing is fixed on
Determine the upper end of pedestal, a PLC control panels are inlaid on the left of the numerical control housing forward end face, the PLC control panels are used to control
The start and stop of electric elements, the numerical control housing are internally provided with a working space, the working space front end inside the device
A push-and-pull protective door is provided on wall, the center position of the working space lower end wall is provided with a workbench, the work
The center position of space upper end wall is provided with a revolution space, and the center position of the revolution space lower end wall is provided with one
Middle through-hole, the middle through-hole connection revolution space and working space, the center position of the revolution space upper end wall, which is fixed, to be connected
A servo motor is connected to, the servo motor is sequentially connected by the motor mandrel of its lower end with bearing plate, under the bearing plate
The center position of end face is fixedly connected with a rotary shaft, and the lower end of the rotary shaft passes through middle through-hole and fixed with horizontal slide
Connection, the center of the horizontal slide lower face are provided with the T shape sliding grooves of a horizontal direction, the T shapes sliding groove
A bearing groove is provided on front bulkhead, dynamic space, power space front end are set in the aft bulkhead of the T shapes sliding groove
The center position of wall is provided with a bearing hole, the bearing hole connection sliding groove and power space, behind the power space
An electric rotating machine is fixed on end wall, a screw is provided in the sliding groove, the front end of the screw is located in bearing groove, institute
The rear end for stating screw passes through bearing hole and is sequentially connected with electric rotating machine, and a T shape link blocks are provided in the sliding groove, described
By screw thread borehole jack inside it on screw, the lower end of the T shapes link block passes through T shapes sliding groove and consolidates T shapes link block
Surely hydraulic lift is connected with, the hydraulic lift includes hydraulic pressure shell, and the hydraulic pressure enclosure is provided with a liquid
Space is pressed, the hydraulic space is internally provided with a hydraulic plate, and the upper and lower ends of the hydraulic space front bulkhead are respectively arranged with
The end of upper connecting tube and lower connecting tube, the upper connecting tube and lower connecting tube connects the upper and lower ends of two-way pump respectively, described
Two-way pump is fixedly connected on by the spill block of rear side on the front end face of hydraulic pressure shell, the upper connecting tube and lower connecting tube
Inside is respectively arranged with the hydraulic pressure sky of connecting hole and lower connecting hole, the upper connecting hole connection two-way pump and hydraulic plate upper end
Between, the lower connecting hole connects two-way pump and the hydraulic space of hydraulic plate lower end, is all set in the upper connecting hole and lower connecting hole
A solenoid valve is equipped with, the lower end of the hydraulic space is provided with a sealing lift span, is sealed in the sealing lift span equipped with one
Rubber ring, the upper end of the hydraulic plate cylindroid is provided with a seal groove, a gasket seal is set in the seal groove, described
Guide groove is symmetrically arranged with before and after the lower end of hydraulic plate cylindroid, equipped with guide pad in the guide groove, before the hydraulic space
It is provided with the guide rail of vertical direction in end walls at position corresponding with guide pad afterwards, consolidates at the center of the hydraulic plate lower face
Surely an elevating lever is connected with, the lower end of the elevating lever passes through sealing rubber ring and is fixedly connected with a drilling equipment.
2. a kind of numerical control processing apparatus according to claim 1, it is characterised in that：The hydraulic space upper and lower ends it is straight
Diameter is both less than the diameter of hydraulic plate.
3. a kind of numerical control processing apparatus according to claim 1, it is characterised in that：The drilling equipment includes set casing
Body, the fixed shell are internally provided with a transmission space, and the center position of the transmission space lower end wall is provided with one turn
Dynamic hole, the rotation hole connection transmission space and free surrounding space, the center position of the transmission space upper end wall are fixed with one
High-speed electric expreess locomotive, the high-speed electric expreess locomotive lower end are sequentially connected with a transmission shaft, and the lower end of the transmission shaft is fixedly connected with a fixation
Swivel plate, the cylindricality for being provided with an annular stop plate, the annular stop plate and transmission space of the fixed swivel plate upper end
Inner wall is fixedly connected, and the center position of the fixed swivel plate lower face is fixedly connected with connecting rod, under the connecting rod
End is across rotation hole and is fixedly connected with a drill holder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810117745.4A CN108213484B (en) | 2018-02-06 | 2018-02-06 | A kind of numerical control processing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810117745.4A CN108213484B (en) | 2018-02-06 | 2018-02-06 | A kind of numerical control processing apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108213484A true CN108213484A (en) | 2018-06-29 |
| CN108213484B CN108213484B (en) | 2018-11-27 |
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ID=62670939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810117745.4A Active CN108213484B (en) | 2018-02-06 | 2018-02-06 | A kind of numerical control processing apparatus |
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| Country | Link |
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| CN (1) | CN108213484B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6231279B1 (en) * | 1998-05-29 | 2001-05-15 | Pluritec Italia S.P.A. | Drilling machine with at least two machining heads for machining printed circuit boards |
| CN103008720A (en) * | 2011-09-26 | 2013-04-03 | 溧阳市华生机械制造有限公司 | Automatic circular mould perforating machine |
| CN104014841A (en) * | 2014-06-21 | 2014-09-03 | 孙正玉 | Gantry type self-driving porous drill |
| CN106694951A (en) * | 2017-01-05 | 2017-05-24 | 杨娇仔 | Precision drilling equipment for hardware |
| CN107335840A (en) * | 2017-06-08 | 2017-11-10 | 孟玉 | A kind of hardware drilling equipment |
| CN107498078A (en) * | 2017-09-18 | 2017-12-22 | 镇江市高等专科学校 | A kind of component of machine drilling equipment for preventing skew |
-
2018
- 2018-02-06 CN CN201810117745.4A patent/CN108213484B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6231279B1 (en) * | 1998-05-29 | 2001-05-15 | Pluritec Italia S.P.A. | Drilling machine with at least two machining heads for machining printed circuit boards |
| CN103008720A (en) * | 2011-09-26 | 2013-04-03 | 溧阳市华生机械制造有限公司 | Automatic circular mould perforating machine |
| CN104014841A (en) * | 2014-06-21 | 2014-09-03 | 孙正玉 | Gantry type self-driving porous drill |
| CN106694951A (en) * | 2017-01-05 | 2017-05-24 | 杨娇仔 | Precision drilling equipment for hardware |
| CN107335840A (en) * | 2017-06-08 | 2017-11-10 | 孟玉 | A kind of hardware drilling equipment |
| CN107498078A (en) * | 2017-09-18 | 2017-12-22 | 镇江市高等专科学校 | A kind of component of machine drilling equipment for preventing skew |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108213484B (en) | 2018-11-27 |
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Effective date of registration: 20181016 Address after: 312300 Zhu Sheng, Zhu Xiang Village, Yonghe Town, Shangyu District, Shaoxing, Zhejiang Applicant after: Shaoxing Shangyu rotary dragon Tools Co., Ltd. Address before: 245500 12, five East Hall Industrial Park, Bi Yang Town, Yixian County, Huangshan City, Anhui. Applicant before: Chai Lingfei |
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