CN106271648B - A kind of drilling-tapping machine - Google Patents
A kind of drilling-tapping machine Download PDFInfo
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- CN106271648B CN106271648B CN201610862644.0A CN201610862644A CN106271648B CN 106271648 B CN106271648 B CN 106271648B CN 201610862644 A CN201610862644 A CN 201610862644A CN 106271648 B CN106271648 B CN 106271648B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P23/00—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
- B23P23/02—Machine tools for performing different machining operations
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Abstract
The present invention relates to machining apparatus technical field more particularly to a kind of drilling-tapping machines.A kind of drilling-tapping machine of the invention, including for the drilling-tapping head for Workpiece boring, tapping, it further include the adsorbent equipment for drilling-tapping head to be fixed on to workpiece, adsorbent equipment acts on the direction of the adsorption capacity of workpiece and the direction of feed of drilling-tapping head is not parallel.A kind of drilling-tapping machine of the invention can be not necessarily to travelling workpiece using workpiece as positioning datum, when work, be not necessarily to clamping, calibration of workpieces, save working hour；Small, low cost can be used for that the axial hole with machined surface out of plumb can be processed for volume is big, weight is big, is not easy to mobile Workpiece boring, tapping；It can be used for processing the hole of large aperture.
Description
Technical field
The present invention relates to machining apparatus technical field more particularly to a kind of drilling-tapping machines.
Background technique
Drilling, tooth machining unit are process equipments common in machining apparatus technical field, and common drilling, tooth machining unit are general
Including drilling-tapping head, pedestal, grain-clamping table, when work, be mostly need travelling workpiece and by workpiece positioning, be clamped in clamping
Platform, then drilling-tapping head is moved along direction of feed, and such drilling, that tooth machining unit is only used for processing volume is small, light-weight etc.
The large-scale workpiece of workpiece easy to remove, big, the mobile inconvenience of some weight then can not use common drilling, tapping to machine.Mesh
Before there is a kind of floor boring (as shown in Fig. 4) to can be used for processing large-scale workpiece, workpiece is placed in revolving platform 102, revolving platform
102 can about the z axis rotation transformation station and along sliding rail 101 X-axis slide, processing head 105 can be slided along Y-axis, it is such to fall
Ground boring can be used for processing large-scale workpiece, but its figure is huge, and cost is high.Since such floor boring is to be with revolving platform 102
Basis of reference needs first calibration of workpieces position and needs to position workpiece and be clamped in revolving platform when in use, wastes work
When.
In addition, there are also a kind of magnetic drill (as shown in Fig. 5) for existing market comprising one for adsorbing the axial direction of workpiece
Magnetic suction disc 103, the direction of feed for processing head 105 is parallel with the direction of adsorption capacity that axial magnetic sucker 103 generates, processing
When workpiece, axial magnetic sucker 103 is adsorbed in workpiece surface to be processed, and such magnetic drill is primarily present following problems: 1, this
Sliding as shown in Figure 8 easily occurs when being drilled using large torque for class magnetic drill, therefore can not process the hole of large aperture；2,
Such magnetic drill is only used for the processing axial direction hole vertical with face to be processed.
The content of present invention
The purpose of the present invention is to solve the shortcomings of the prior art providing a kind of drilling-tapping machine, can be used for be not easy to move
Dynamic workpiece drilled, tapping, and structure is simple, and production cost is low.
To achieve the above object, a kind of drilling-tapping machine of the invention, including for being attacked for the drilling of Workpiece boring, tapping
Dental engine handpiece, further includes the adsorbent equipment for drilling-tapping head to be fixed on to workpiece, and adsorbent equipment acts on the absorption of workpiece
The direction of power and the direction of feed of drilling-tapping head are not parallel.
Preferably, the adsorbent equipment is electromagnetic absorption device, defines the face that electromagnetic absorption device is adsorbed on workpiece and is
Adsorption plane, defining the face that workpiece is processed by the drilling-tapping head is machined surface, and machined surface is adjacent on workpiece with adsorption plane
Two faces.
Preferably, the adsorbent equipment act on the adsorption capacity of workpiece direction and drilling-tapping head direction of feed it
Between angle be 70 ° ~ 110 °.
Preferably, the direction of feed of the drilling-tapping head is parallel to the stationary plane of adsorbent equipment and workpiece.
It preferably, further include pedestal, drilling-tapping head is slideably positioned in pedestal, the adsorbent equipment along its direction of feed
Including rear pedestal and magnechuck, rear pedestal is opposite with pedestal to slide setting, and magnechuck is set to rear pedestal.
Preferably, the pedestal is provided with handpiece support portion and vertical portion, and drilling-tapping head is along handpiece support portion
Extending direction sliding setting, adsorbent equipment is opposite with vertical portion to slide setting.
It preferably, further include the lifting device for driving pedestal to go up and down relative to rear pedestal, rear pedestal and pedestal are in Z-direction
Opposite sliding setting, lifting device are set to pedestal.
Preferably, the handpiece support portion and vertical portion are arranged in a mutually vertical manner.
Preferably, the handpiece support portion and vertical portion are rotatably connected.
Preferably, the pedestal is provided with the T-slot extended along Z-direction, which further includes sliding setting
In the fastening block and holding screw of T-slot, one end of holding screw passes through rear pedestal and is threadedly coupled with fastening block, tight by locking
Determine screw and pedestal is fixed on rear pedestal.
Preferably, further include feed drive unit, feed drive unit include feed servo motor, feed screw and with
The nut of feed screw cooperation, drilling-tapping head are connect with nut, and feed servo motor drives feed screw rotation；Further include
Be slidably connected component, and the component that is slidably connected includes that sliding rail and the sliding block with sliding rail cooperation, drilling-tapping head are connected by sliding
Connected components are connect with pedestal.
Preferably, the drilling-tapping head includes the spindle motor of spindle box and driving spindle rotation, spindle motor peace
Loaded on spindle box, spindle box is slideably positioned in pedestal and connect with nut.
It preferably, further include scale and pointer for showing relative position between adsorbent equipment and pedestal, scale setting
In pedestal, pointer is set to adsorbent equipment.
It preferably, further include lifting lug for lifting whole bench drill hole tooth machining unit, lifting lug is set to pedestal.
Preferably, the pedestal is L-shaped, and pedestal is provided with handpiece support portion and vertical portion, and the sliding of drilling-tapping head is set
It is placed in handpiece support portion, adsorbent equipment is slideably positioned in vertical portion.
The magnechuck extends downward with positioning surface close to the side of vertical portion, and positioning surface is perpendicular to adsorbent equipment
With the stationary plane of workpiece.
It preferably, further include positioning device, positioning device includes extending arm and positioning pin, and positioning pin is set to extending arm
The other end of one end, extending arm is slideably positioned in adsorbent equipment.
Preferably, extending arm is provided with horizontal ruler.
Beneficial effects of the present invention: a kind of drilling-tapping machine of the invention can be worked using workpiece as positioning datum
When, it is not necessarily to travelling workpiece, is not necessarily to clamping, calibration of workpieces, saves working hour；The mobile drilling-tapping machine makes to adsorb to target position
Device is connect with workpiece, and adsorbent equipment has the function of tightening, clamping, and the position between pedestal and workpiece is made to keep relatively solid
It is fixed, drilling, tapping operation can be started；A kind of drilling-tapping machine of the invention, small, low cost, can be used for for volume it is big,
Weight is big, is not easy to mobile Workpiece boring, tapping, and the axial hole with machined surface out of plumb can be processed；It can be used for processing macropore
The hole of diameter carries out tapping operation especially suitable for the hole to large aperture.
Detailed description of the invention
Fig. 1 is the schematic perspective view of the embodiment of the present invention one.
Fig. 2 is another schematic perspective view of the embodiment of the present invention one.
Fig. 3 is the structural schematic diagram of T-slot, fastening block and holding screw.
Fig. 4 is the forward sight structural schematic diagram of existing floor boring.
Fig. 5 is that existing magnetic drill is in the structural schematic diagram for processing slim plate state.
Fig. 6 is that drilling-tapping machine of the invention is in the structural schematic diagram for processing slim plate state.
Fig. 7 is another structural schematic diagram of existing magnetic drill.
Fig. 8 is the structural schematic diagram that existing magnetic drill slides.
Fig. 9 is the schematic perspective view of the embodiment of the present invention two.
Appended drawing reference includes:
0-workpiece
1-drilling-tapping head
11-12-spindle motors of spindle box
2-adsorbent equipments
21-rear 22-magnechucks of pedestal
23-positioning surfaces
3-pedestals
31-32-handpiece support of T-slot portions, 33-vertical portion
41-extending arm 42-positioning pin, 43-horizontal rulers
5-lifting devices
61-62-holding screws of fastening block
71-feed servo 72-feed screws of motor
81-82-sliding blocks of sliding rail
91-scale 92-pointer, 93-lifting lugs
101-sliding 102-revolving platform of rail, 103-axial magnetic suckers
104-cushion block 105-processing heads.
Specific embodiment
The present invention is described in detail below in conjunction with attached drawing.
Embodiment one.
As shown in Figure 1 and Figure 2, a kind of drilling-tapping machine of the invention, including for being attacked for the drilling of Workpiece boring, tapping
Dental engine handpiece 1, further includes the adsorbent equipment 2 for drilling-tapping head 1 to be fixed on to workpiece, and adsorbent equipment 2 acts on workpiece
The direction of adsorption capacity and the direction of feed of drilling-tapping head 1 are not parallel.
A kind of drilling-tapping machine of the invention can be not necessarily to travelling workpiece, nothing using workpiece as positioning datum, when work
Clamping, calibration of workpieces are needed, working hour is saved；The mobile drilling-tapping machine connect adsorbent equipment 2 with workpiece, inhales to target position
Adsorption device 2 has the function of tightening, clamping, and position between pedestal 3 and workpiece is made to keep relatively fixed, can start drilling,
Tapping operation；A kind of drilling-tapping machine of the invention, small, low cost can be used for for volume is big, weight is big, is not easy to move
The axial hole with machined surface out of plumb can be processed in dynamic Workpiece boring, tapping.
The direction of the adsorption capacity of workpiece and the feeding side of drilling-tapping head 1 are acted on due to adsorbent equipment 2 of the invention
To not parallel, but it is in a certain angle, so that the deflecting force that torque generates is cancelled when carrying out operation using large torque, from
And the structure of drilling-tapping machine of the invention itself can avoid that there is a phenomenon where slidings as shown in Figure 8 to occur, and then make
When carrying out operation with large torque, good stability can be kept, can be used for processing the hole of large aperture, especially suitable for large aperture
Hole carry out tapping.
Preferably, the adsorbent equipment 2 acts on the direction of the adsorption capacity of workpiece and the feeding of drilling-tapping head 1
Angle between direction is 70 ° ~ 110 °, specifically, the angle can be 80 °, 90 ° or 100 °.
Preferably, the adsorbent equipment 2 is electromagnetic absorption device, the face that electromagnetic absorption device is adsorbed on workpiece is defined
For adsorption plane, defining the face that workpiece is processed by the drilling-tapping head 1 is machined surface, and machined surface is phase on workpiece with adsorption plane
Two adjacent faces.
The machined surface and adsorption plane of a kind of drilling-tapping machine of the invention avoid adsorbent equipment 2 not in approximately the same plane
It is rotated relative to workpiece, improves stability when a kind of drilling-tapping machine of the invention works.
Preferably, the direction of feed of the drilling-tapping head 1 is parallel to the stationary plane of adsorbent equipment 2 Yu workpiece.Absorption
The stationary plane of device 2 and workpiece, i.e., workpiece is adsorbed the adsorption plane of the absorption of device 2 in processing operation process；The drilling-tapping
The direction of feed of machine is not limited by face to be processed, and direction of feed can be in appoint with face to be processed in the range of being parallel to stationary plane
Meaning angle, can also drill to the workpiece surface of out-of-flatness, tapping.
As shown in Figure 1, further including pedestal 3, drilling-tapping head 1 is slideably positioned in pedestal 3, the suction along its direction of feed
Adsorption device 2 includes rear pedestal 21 and magnechuck 22, and opposite sliding is arranged rear pedestal 21 with pedestal 3, and magnechuck 22 is set to
Pedestal 21 afterwards.Magnechuck 22 can tightly be adsorbed in workpiece after being powered, and realize the clamping of workpiece, pedestal 21 and pedestal 3 after adjustment
Relative position can adjust the relative altitude of drilling-tapping head 1 with workpiece；After 22 demagnetization of magnechuck, it can be moved up from workpiece
It is dynamic, to realize the fixation and displacement of drilling-tapping machine.
As shown in Figure 1, the pedestal 3 is provided with handpiece support portion 32 and vertical portion 33, drilling-tapping head 1 is along head
The extending direction of support portion 32 slides setting, and the opposite sliding of adsorbent equipment 2 and vertical portion 33 is arranged.A kind of drilling of the invention is attacked
Tooth machine can be used for processing slim plate, and can be using adsorption plane as positioning datum.
Preferably, the pedestal 3 of the present embodiment is L-shaped, the adsorbent equipment 2 of the present embodiment acts on the adsorption capacity of workpiece
Direction and the direction of feed of drilling-tapping head 1 are mutually perpendicular to.
Specifically, the handpiece support portion 32 and vertical portion 33 are arranged in a mutually vertical manner.A kind of drilling-tapping of the present embodiment
Machine in position fixing process, need to only adjust drilling-tapping especially suitable for processing face to be processed and the orthogonal workpiece of adsorption plane
The axial angle in the plane for being parallel to adsorption plane with face to be processed of the main shaft of head 1, improves efficiency.
Specifically, the magnechuck 22 extends downward with positioning surface 23, positioning surface close to the side of vertical portion 33
23 perpendicular to adsorbent equipment 2 and workpiece stationary plane.Specific settable a positioning block, positioning surface 23 are set to locating piece, fixed
Position block, which is detachably located at, only need to be bonded positioning surface 23 or be parallel in position fixing process in magnechuck 22 or rear pedestal 21
Face to be processed is that can guarantee that the axial verticality with face to be processed of the main shaft of drilling-tapping head 1 meets processing request, further
Improve efficiency.Simultaneously as positioning surface 23 can be tightly attached to face to be processed in process, drilling-tapping head can avoid
Beat occurs in the plane for being parallel to adsorption plane for 1 main shaft, further improves stability.
As shown in figure 5, existing magnetic drill is when processing slim plate, contact of the axial magnetic sucker with workpiece to be processed
Area is small, and adsorption capacity is small, and when the centripetal force for processing head is excessive, the absorption between axial magnetic sucker and face to be processed is unstable
It is fixed, so that centripetal force is restricted, seriously affect the raising of machining accuracy and efficiency.And a kind of drilling-tapping machine of the invention, it inhales
Adsorption device 2 acts on the direction of the adsorption capacity of workpiece and the direction of feed of drilling-tapping head 1 is mutually perpendicular to, and processes slim plate
When, sheet material base increase a cushion block 104 can start operation, due to adsorbent equipment 2 of the invention do not act on it is to be processed
Face, therefore the size of adsorption capacity is not influenced by the thickness in face to be processed.
In addition, a kind of drilling-tapping machine of the invention is compact-sized, occupy little space.
As shown in Fig. 2, further including the lifting device 5 for driving pedestal 3 to go up and down relative to rear pedestal 21, rear pedestal 21 and pedestal
3 slide setting relatively in Z-direction, and lifting device 5 is set to pedestal 3.Lifting device 5 includes driving motor and feed screw nut's group
Part.Lifting device 5 is used for the relative position after adjusted between pedestal 21 and pedestal 3, thus in Z-direction adjustment drilling, tapping
Position.
As shown in figure 3, the pedestal 3 is provided with the T-slot 31 extended along Z-direction, which further includes sliding
The dynamic fastening block 61 and holding screw 62 for being set to T-slot 31, one end of holding screw 62 pass through rear pedestal 21 and fastening block 61
It is threadedly coupled, pedestal 3 is fixed on by rear pedestal 21 by locking holding screw 62, it is steady when improving the drilling-tapping machine operation
It is qualitative.
Preferably, which further includes feed drive unit, feed drive unit include feed servo motor 71,
Feed screw 72 and the nut cooperated with feed screw 72, drilling-tapping head 1 are connect with nut, and feed servo motor 71 drives
Dynamic feed screw 72 rotates；It further include the component that is slidably connected, the component that is slidably connected includes sliding rail 81 and cooperates with sliding rail 81
Sliding block 82, drilling-tapping head 1 are connect by being slidably connected component with pedestal 3.
When feed servo motor 71 drives screw turns, drilling-tapping head 1 is slided along direction of feed.Specifically, institute
Stating drilling-tapping head 1 includes spindle box 11 and the spindle motor 12 that driving spindle rotates, and spindle motor 12 is installed on spindle box
11 are rotated with driving spindle, and drill bit is installed on main shaft, and spindle box 11 is slideably positioned in pedestal 3 and connect with nut, feed screw
The axial movement of driving nut, drives spindle box 11 to move together when nut is mobile when 72 rotation.
To reduce resistance when sliding, spindle box 11 is connect by being slidably connected component with pedestal 3.
Specifically, the drilling-tapping machine further includes the scale 91 for showing relative position between adsorbent equipment 2 and pedestal 3
With pointer 92, scale 91 is set to pedestal 3, and pointer 92 is set to adsorbent equipment 2.
The drilling-tapping machine is moved for the ease of hanging, further includes the lifting lug 93 for lifting whole bench drill hole tooth machining unit, lifting lug 93
It is set to pedestal 3.
In order to improve machining accuracy, the drilling, tooth machining unit further include positioning device, and positioning device includes extending arm 41 and determines
Position pin 42, positioning pin 42 are set to one end of extending arm 41, and the other end of extending arm 41 is slideably positioned in adsorbent equipment 2.Specifically
, extending arm 41 is provided with horizontal ruler 43.When operation, the mobile drilling-tapping machine adjusts extending arm 41 to target length, makes
Positioning pin 42 is connected to the datum end face of workpiece, so that drilling-tapping head 1 be made to be drilled, be attacked using datum end face as reference
Tooth operation.
Embodiment two.
This implementation and embodiment one the difference is that, as shown in figure 9, the handpiece support portion 32 and vertical portion 33 can turn
Dynamic connection, specifically, handpiece support portion 32 and vertical portion 33 pivot axis connection by one, so that handpiece support portion 32 can be around
The pivotal axis is rotated relative to vertical portion 33, to realize between the direction of feed and face to be processed that adjust drilling-tapping head 1
Angle.
Brill can be adjusted in the drilling-tapping machine of the present embodiment, the angle adjusted between handpiece support portion 32 and vertical portion 33
Angle between the direction of feed and face to be processed of hole tapping head 1, to process axial in a certain angle with face to be processed
Hole.
Remaining feature of the present embodiment can refer to the explanation of embodiment one, and details are not described herein.
The present invention known in summary is having above-described good characteristic, is able to enable it in use, is promoted previous
The efficiency that does not have in technology and there is practicability, become the product of a great practical value.
The above is only a preferred embodiment of the present invention, for those of ordinary skill in the art, according to the present invention
Thought, there will be changes in the specific implementation manner and application range, and the content of the present specification should not be construed as to the present invention
Limitation.
Claims (7)
1. a kind of drilling-tapping machine, including for the drilling-tapping head (1) for Workpiece boring, tapping, it is characterised in that: also wrap
The adsorbent equipment (2) for drilling-tapping head (1) to be fixed on to workpiece is included, adsorbent equipment (2) acts on the adsorption capacity of workpiece
Direction and drilling-tapping head (1) direction of feed it is not parallel；
The adsorbent equipment (2) is electromagnetic absorption device, and defining the face that electromagnetic absorption device is adsorbed on workpiece is adsorption plane, fixed
The face that volunteer's part is processed by the drilling-tapping head (1) is that machined surface, machined surface and adsorption plane are two adjacent on workpiece
Face；
Drilling-tapping machine further includes pedestal (3), and drilling-tapping head (1) is slideably positioned in pedestal (3) along its direction of feed, described
Adsorbent equipment (2) includes rear pedestal (21) and magnechuck (22), and rear pedestal (21) and pedestal (3) opposite sliding are arranged, electromagnetism
Sucker (22) is set to rear pedestal (21)；
The magnechuck (22) extends downward with positioning surface (23) close to the side of vertical portion (33), and positioning surface (23) hangs down
Directly in the stationary plane of adsorbent equipment (2) and workpiece.
2. a kind of drilling-tapping machine according to claim 1, it is characterised in that: the feeding of the drilling-tapping head (1)
It is oriented parallel to the stationary plane of adsorbent equipment (2) and workpiece.
3. a kind of drilling-tapping machine according to claim 1, it is characterised in that: the pedestal (3) is provided with handpiece support
Portion (32) and vertical portion (33), drilling-tapping head (1) slide setting, absorption dress along the extending direction of handpiece support portion (32)
(2) and vertical portion (33) opposite sliding is set to be arranged.
4. a kind of drilling-tapping machine according to claim 3, it is characterised in that: the handpiece support portion (32) and vertical portion
(33) it is arranged in a mutually vertical manner.
5. a kind of drilling-tapping machine according to claim 3, it is characterised in that: the handpiece support portion (32) and vertical portion
(33) it is rotatably connected.
6. a kind of drilling-tapping machine according to claim 1, it is characterised in that: further include driving pedestal (3) relative to rear
The lifting device (5) of pedestal (21) lifting, rear pedestal (21) and pedestal (3) slide setting, lifting device Z-direction is opposite
(5) pedestal (3) are set to.
7. a kind of drilling-tapping machine according to claim 1, it is characterised in that: further include positioning device, positioning device packet
Extending arm (41) and positioning pin (42) are included, positioning pin (42) is set to one end of extending arm (41), the other end of extending arm (41)
It is slideably positioned in adsorbent equipment (2), extending arm (41) is provided with horizontal ruler (43).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610862644.0A CN106271648B (en) | 2016-09-29 | 2016-09-29 | A kind of drilling-tapping machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610862644.0A CN106271648B (en) | 2016-09-29 | 2016-09-29 | A kind of drilling-tapping machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106271648A CN106271648A (en) | 2017-01-04 |
| CN106271648B true CN106271648B (en) | 2018-12-11 |
Family
ID=57715776
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610862644.0A Active CN106271648B (en) | 2016-09-29 | 2016-09-29 | A kind of drilling-tapping machine |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108655738A (en) * | 2018-06-22 | 2018-10-16 | 嘉善优耐特滑动轴承厂 | A kind of automatic drilling tooth machining unit |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2046412U (en) * | 1989-04-25 | 1989-10-25 | 史安 | Micro magnetic universal drill |
| JP4381542B2 (en) * | 2000-02-17 | 2009-12-09 | コマツ工機株式会社 | Crankshaft complex processing equipment |
| CN201693214U (en) * | 2010-06-24 | 2011-01-05 | 金志明 | Novel magnetic drill |
| CN201997759U (en) * | 2011-03-15 | 2011-10-05 | 中冶天工（天津）装备制造有限公司 | Universal posture adjusting device for magnetic drill |
| CN202037351U (en) * | 2011-04-06 | 2011-11-16 | 中国铁道科学研究院基础设施检测研究所 | Manual damage hole manufacture device for steel rail |
| CN203171261U (en) * | 2013-01-28 | 2013-09-04 | 深圳市仕兴鸿精密机械设备有限公司 | Drilling tapping machine |
| CN103433750B (en) * | 2013-08-23 | 2015-09-30 | 广东恒鑫智能装备股份有限公司 | A kind of generator casing drilling-tapping all-in-one |
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2016
- 2016-09-29 CN CN201610862644.0A patent/CN106271648B/en active Active
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Effective date of registration: 20190806 Address after: 523000 Dongguan Houjie Town Houjie Community Houjie Village West Ring Road Dongguan Houjie Steel Machinery Factory Patentee after: Wang Xiaogang Address before: 404199 Chongqing District of Wanzhou City, this branch No. 10 3 unit 5-2 Patentee before: Tan Ping |
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