CN105716562B - The positive clearance detector of bearing - Google Patents
The positive clearance detector of bearing Download PDFInfo
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- CN105716562B CN105716562B CN201410718379.XA CN201410718379A CN105716562B CN 105716562 B CN105716562 B CN 105716562B CN 201410718379 A CN201410718379 A CN 201410718379A CN 105716562 B CN105716562 B CN 105716562B
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- bearing
- pressurized cylinder
- cylinder structure
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Abstract
The invention discloses a kind of positive clearance detectors of bearing,The bearing locating platform of annular is formed on workbench,Handling system can be by bearing in assembly line,It is carried and is put between three stations of bearing locating platform and defective work receiving warehouse,On,Lower bracket is individually fixed in workbench both sides up and down,Longitudinal lifting drive can drive outer ring locating ring to decline bearing outer ring,Upper pressurized cylinder structure is fixedly connected with outer ring locating ring,The piston-rod lower end of upper pressurized cylinder structure is fixedly connected with upper inner ring platen,Upper inner ring platen can compress bearing inner race upper surface,The piston rod upper end of lower pressurized cylinder structure is fixedly connected with lower inner ring platen,Lower inner ring platen can compress bearing inner race lower face,Measuring pen to the continuous value of piston rod upper surface height of upper pressurized cylinder structure and can be messaging in control system,Measurement result of the present invention is accurate,High degree of automation,Improve production and detection efficiency,Reduce cost of labor.
Description
Technical field
The present invention relates to a kind of welding equipment of scattered heat-fusion piece, more particularly to a kind of positive clearance detector of bearing.
Background technology
If bearing is being to use inner ring and the excessive axis that may result in bearing of the end-play of outer ring to exist using process
Significantly sedimentation, causes to vibrate in use much, generates a large amount of noises, and when bearing rotary is low to bearing accuracy, is easy out
Now abrasion and fatigue, bearing capacity can be greatly affected, it is therefore desirable to it is detected in manufacture end-play, it is common at present
End-play detection method be unilateral detection method, such as bearing inner race is fixed, apply on outer ring one it is top-down outside
Power load eliminates the gap between ball and inner ring in bearing, and the distance for then measuring bearing outer ring movement obtains bearing axial play
Gap, this kind of method only eliminate one, inner ring and ball to gap, measurement result can be caused inaccurate.
Invention content
In order to overcome drawbacks described above, the present invention provides a kind of positive clearance detector of bearing, the positive clearance detection of the bearing
Device can accurately detect the end-play of bearing, and measuring speed is fast, high degree of automation.
The present invention in order to solve its technical problem used by technical solution be：A kind of positive clearance detector of bearing, packet
Include workbench, upper bracket, lower bracket, handling system, longitudinal lifting drive, outer ring locating ring, upper inner ring platen, lower inner ring
Platen, upper pressurized cylinder structure, lower pressurized cylinder structure, the first and second solenoid valve, measuring pen and control system, the workbench
The upper bearing locating platform for forming annular, handling system can receive bearing in assembly line, bearing locating platform and defective work
It is carried and is put between three stations of feed bin, upper and lower holder is fixed positioned in workbench both sides up and down respectively, longitudinal to lift
The fixing end of driving device is fixed on upper bracket, and the tache motorice of longitudinal lifting drive can drive outer ring locating ring to decline
And the bearing outer ring on bearing locating platform is compressed, upper pressurized cylinder structure is fixedly connected with outer ring locating ring, upper pressurized cylinder
The piston-rod lower end of structure is fixedly connected with upper inner ring platen, and the first solenoid valve can control gas circuit and be supplied to upper pressurized cylinder structure
The dynamic above piston rod of pressurized cylinder structure of gas drive and upper inner ring platen thereon, which decline, compresses bearing inner race upper surface, lower pressurization gas
Cylinder structure is fixed on lower bracket, and the piston rod upper end of lower pressurized cylinder structure is fixedly connected with lower inner ring platen, the second electromagnetism
Valve can control gas circuit and drive the piston rod of pressurized cylinder structure down and lower inner ring pressure thereon to lower pressurized cylinder structure gas supply
Disk, which rises, compresses bearing inner race lower face, and measuring pen can be to the continuous value of piston rod upper surface height of upper pressurized cylinder structure
And it is messaging in control system, the longitudinal lifting drive of control system control, the first and second solenoid valve and measuring pen action.
As a further improvement on the present invention, it is additionally provided with rotating driving device and lower rotating driving device, upper rotation is driven
Dynamic device can drive the piston rod of pressurized cylinder structure to rotate, and lower rotating driving device can drive lower pressurized cylinder structure
Piston rod rotation, the upper rotating driving device of control system control and the action of lower rotating driving device.
As a further improvement on the present invention, upper and lower rotating driving device is motor, and motor passes through belt gear
Upper and lower pressurized cylinder structurally live stopper rod is driven.
As a further improvement on the present invention, the upper bracket is equipped with a guiding axis bearing sleeve, longitudinal lifting drive
Tache motorice be fixed with lifting guiding axis, the lifting guiding axis sliding be inserted in guiding axis bearing sleeve, lifting guiding axis lower end with
Upper pressurized cylinder structure is fixedly connected, and outer ring locating ring is fixed on the cylinder body lower end of pressurized cylinder structure.
As a further improvement on the present invention, be additionally provided with an automatic alignment device, including be fixed on lower bracket casing,
Can rotate be inserted in casing to positive axis, be sheathed on the elastomer and capable of rotating on positive axis be inserted in positive axis upper end
Interior ejector pin, the ejector pin upper end tight against lower pressurized cylinder structure piston-rod lower end face, under being more than in upper end outer diameter to positive axis
The T-shaped structure of outer diameter is held, elastomer both ends are respectively tight against the step surface of the T-shaped structure and lower end madial wall.
As a further improvement on the present invention, the ejector pin upper surface is spherical arc.
As a further improvement on the present invention, the handling system includes fork material driving device, cross sliding driving device and material
Fork, the cross sliding driving device are fixed on workbench, and cross sliding driving device can drive fork material driving device in the horizontal plane
Linear motion, fork material driving device can drive material fork in the horizontal plane along the direction vertical with fork material driving device moving direction
Linear motion, the assembly line are connected with workbench upper bearing (metal) locating platform horizontal alignment.
As a further improvement on the present invention, be additionally provided with defective work material collecting device, including rewinding holder, rewinding cylinder,
Defective work pallet, discharge cylinder and defective work feed bin, the rewinding holder are fixed below workbench, the cylinder of rewinding cylinder
Body is fixed on rewinding holder, and piston rod and the defective work pallet lower end of rewinding cylinder are connected, defective work pallet upper end energy
It is enough to be connected with workbench upper bearing (metal) locating platform horizontal alignment, the inclination that one end is higher than the other end is formed on defective work feed bin
Slideway, which be able to be aligned with defective work push-plate upper surface is connected, and discharge cylinder is fixed on rewinding holder
On, the piston rod of discharge cylinder can release the bearing on defective work push-plate into defective work feed bin inclined ramp.
The beneficial effects of the invention are as follows：The present invention is right respectively by upper and lower inner ring platen by after bearing outer ring stationary positioned
Bearing inner race upper/lower terminal applies the gap that pressure eliminates inner ring and ball and the upper and lower step surface of bearing outer ring respectively, then divides
Other measurement gap numerical value, which is finally averaged, to be calculated, and measurement result is accurate, avoids measurement error, it is ensured that bearing uses steady
Fixed, low noise, long lifespan, which measures and automatic distinguishing processing defective work, high degree of automation are full
The foot production requirement of bearing high speed detection, improves production and detection efficiency, reduces cost of labor.
Description of the drawings
Fig. 1 is the front view of the present invention；
Fig. 2 is the left view of the present invention；
Fig. 3 is sectional view along A-A in Fig. 2.
Specific implementation mode
Embodiment：A kind of positive clearance detector of bearing, including it is workbench 1, upper bracket 2, lower bracket 3, handling system, vertical
To lifting drive 4, outer ring locating ring 5, upper inner ring platen 6, lower inner ring platen 7, upper pressurized cylinder structure 8, lower pressurization gas
Cylinder structure 9, the first and second solenoid valve 10,11, measuring pen 12 and control system form the bearing positioning of annular on the workbench 1
Platform 13, handling system can be by bearings between three assembly line, bearing locating platform 13 and defective work receiving warehouse stations
It is carried and is put, upper and lower holder 3 is fixed positioned in about 1 both sides of workbench respectively, and longitudinal lifting drive 4 is consolidated
Fixed end is fixed on upper bracket 2, and the tache motorice of longitudinal lifting drive 4 can drive outer ring locating ring 5 to decline simultaneously compression axis
The bearing outer ring 14 on locating platform 13 is held, upper pressurized cylinder structure 8 is fixedly connected with outer ring locating ring 5, upper pressurized cylinder knot
The piston-rod lower end of structure 8 is fixedly connected with upper inner ring platen 6, and the first solenoid valve 10 can control gas circuit to upper pressurized cylinder structure
8 gas supply drive the above piston rod of pressurized cylinder structure 8 and upper inner ring platen 6 thereon to decline and compress 15 upper surface of bearing inner race,
Lower pressurized cylinder structure 9 is fixed on lower bracket 3, and the piston rod upper end of lower pressurized cylinder structure 9 is fixed with lower inner ring platen 7 to be connected
Connect, second solenoid valve 10 can control gas circuit to the piston rod of the lower pressurized cylinder structure of lower pressurized cylinder structure 9 gas supply driving 9 and
Lower inner ring platen 7 thereon, which rises, compresses 15 lower face of bearing inner race, and measuring pen 12 can be to the piston of upper pressurized cylinder structure 8
Height continuous value in bar upper surface is simultaneously messaging in control system, longitudinal the 4, first and second electricity of lifting drive of control system control
Magnet valve 10,11 and measuring pen 12 act.
Work flow is as follows：
1. work starts, bearing to be detected is transported to from assembly line on bearing locating platform 13 and examines by handling system
It surveys, then handling system exits detection station waiting；
2. the outer ring that longitudinal lifting drive 4 drives the decline of outer ring locating ring 5 to treat detection bearing is positioned and is pressed
Tightly, 6 lower face of inner ring platen and 5 lower face position consistency of outer ring locating ring are gone up at this time；
3. the first solenoid valve 10 is connected, under the piston rod of the upper pressurized cylinder structure of upper pressurized cylinder structure 8 gas supply driving 8
Drop, and then inner ring platen 6 is made to apply thrust to the inner ring of bearing, so that bearing outer ring 14, bearing inner race 15 and steel ball 16 is close to,
Clearance in elimination；
4. measuring pen 12 reads the piston rod upper surface height number of upper pressurized cylinder structure 8, and is stored in control system
In case calculating；
5. the first solenoid valve 10 disconnects, the piston rod release of upper pressurized cylinder structure 8, upper inner ring platen 6 returns to and axis
14 corresponding initial position of bearing outer-ring, second solenoid valve 10 are connected, to the upper pressurized cylinder knot of lower pressurized cylinder structure 9 gas supply driving
It is pushed up on the piston rod of structure 8, thrust is applied to 15 lower end of bearing inner race by lower inner ring platen 7, makes bearing outer ring 14, bearing inner race
15 and steel ball 16 be close to, eliminate lower clearance；
6. measuring pen 12 reads again the piston rod upper surface height number of pressurized cylinder structure 8, and is stored in control
System is in case calculate；
7. value when control system to pressurizeing above and below subtracts each other to obtain a difference, as positive clearance value presets the value with equipment
Value range compares, and judges whether this workpiece is qualified；
Certified products are made to flow into next procedure 8. handling system acts again, defective work is carried to unqualified station.
The device structure is simple, applies pressure by air pressure, by the way that pressure calculates acquisition accurately positive clearance twice above and below
Value, and certified products and defective work are automatically processed, product is detected and handled automatically, realizes intelligence, high speed, accurate detection,
It saves manually, improves detection efficiency.
It is additionally provided with rotating driving device 17 and lower rotating driving device 18, upper rotating driving device 17, which can drive, to be added
It calms the anger the piston rod rotation of cylinder structure 8, lower rotating driving device 18 can drive the piston rod of lower pressurized cylinder structure 9 to rotate,
The upper rotating driving device 17 of control system control and the action of lower rotating driving device 18, are divided by upper and lower rotating driving device 18
Do not drive the piston rod of upper and lower pressurized cylinder structure 9 that upper and lower inner ring platen 7 is driven to rotate, while 12 continuous value of measuring pen is simultaneously
Average computation can obtain exact numerical, reduce detection error, it is ensured that testing result is accurate.
The upper and lower rotating driving device 18 is motor, and motor is by belt gear to upper and lower pressurized cylinder knot
9 piston rod of structure is driven.
The upper bracket 2 is equipped with a guiding axis bearing sleeve 19, and the tache motorice of longitudinal lifting drive 4 is fixed with lifting and leads
To axis 20, the lifting guiding axis 20 sliding is inserted in guiding axis bearing sleeve 19, lifting 20 lower end of guiding axis and upper pressurized cylinder knot
Structure 8 is fixedly connected, and outer ring locating ring 5 is fixed on the cylinder body lower end of pressurized cylinder structure 8, ensures outer delineation by guiding mechanism
Position ring 5 and upper 6 straight line of inner ring platen decline, and avoid the occurrence of position deviation.
Be additionally provided with an automatic alignment device, including be fixed on lower bracket 3 casing 21, can rotate and be inserted in casing 21
It is interior to positive axis 22, be sheathed on on positive axis 22 elastomer 23 and the ejector pin being inserted in in 22 upper end of positive axis can be rotated
24,24 upper end of the ejector pin is more than lower end to positive axis 22 tight against the piston-rod lower end face of lower pressurized cylinder structure 9 in upper end outer diameter
The T-shaped structure of outer diameter, 23 both ends of elastomer are automatic right respectively tight against 21 lower inner side wall of the step surface of the T-shaped structure and casing
Equipment elastic can push against the piston-rod lower end face of lower pressurized cylinder structure 9, make upper surface and the test desk of lower inner ring platen 7
Concordantly, bearing not will produce and block when carrying, and in upper pressurization, realize returning quickly soon after lower pressurizing piston bar is shunk back
Position.
24 upper surface of the ejector pin is spherical arc.
The handling system includes fork material driving device 25, cross sliding driving device 26 and material fork 27, the traversing driving dress
It sets 26 to be fixed on workbench 1, cross sliding driving device 26 can drive fork material driving device to move along a straight line in the horizontal plane, fork material
Driving device 25 can drive material fork 27 to move along a straight line in the horizontal plane along the direction vertical with fork material driving device moving direction,
The assembly line is connected with 1 upper bearing (metal) locating platform of workbench, 13 horizontal alignment, and fork material driving device 25 is advanced, and material fork 27 will wait for
It surveys bearing to fork, then cross sliding driving device 26 is traversing, will measure on workpiece handling to bearing locating platform 13, the structure
Simply, easy to operation, naturally it is also possible to bearing to be carried using manipulator gripping mode, this is special according to this for those skilled in the art
The equivalent constructions that profit is readily conceivable that.
It is additionally provided with defective work material collecting device, including rewinding holder 28, rewinding cylinder 29, defective work pallet 30, discharge
Cylinder 31 and defective work feed bin 32, the rewinding holder 28 are fixed on 1 lower section of workbench, and the cylinder body of rewinding cylinder 29 is fixed on
On rewinding holder 28, piston rod and 30 lower end of defective work pallet of rewinding cylinder 29 are connected, 30 upper end energy of defective work pallet
It is enough to be connected with 1 upper bearing (metal) locating platform of workbench, 13 horizontal alignment, it is formed with one end on defective work feed bin 32 and is higher than the other end
Inclined ramp, which be able to be aligned with defective work push-plate upper surface is connected, and discharge cylinder 31 is fixed on
On rewinding holder 28, the piston rod of discharge cylinder 31 can release the bearing on defective work push-plate to defective work feed bin 32
In inclined ramp, when it is defective work to detect workpiece, control system controls handling system by workpiece handling to defective work
On pallet 30, then rewinding cylinder 29, which is ventilated, drops to workpiece by defective work pallet 30 inclination of defective work feed bin 32
Slideway upper end position, then discharge cylinder 31, which is pushed forward, is pushed out to defective work in the slideway of defective work feed bin 32, unqualified
Product are slided along slideway carries out rewinding, simple in structure, can fast automatic rewinding.
Claims (8)
1. a kind of positive clearance detector of bearing, it is characterised in that：Including workbench (1), upper bracket (2), lower bracket (3), remove
Fortune system, longitudinal lifting drive (4), outer ring locating ring (5), upper inner ring platen (6), lower inner ring platen (7), upper pressurization gas
Cylinder structure (8), lower pressurized cylinder structure (9), the first and second solenoid valve (10,11), measuring pen (12) and control system, the work
Make to be formed the bearing locating platform (13) of annular on platform, handling system can be by bearing in assembly line, bearing locating platform and not
It is carried and is put between three stations of certified products receiving warehouse, upper and lower holder is fixed positioned in workbench both sides up and down respectively,
The fixing end of longitudinal lifting drive is fixed on upper bracket, and the tache motorice of longitudinal lifting drive can drive outer delineation
Position ring declines and compresses the bearing outer ring (14) on bearing locating platform, and upper pressurized cylinder structure is fixed with outer ring locating ring to be connected
It connects, the piston-rod lower end of upper pressurized cylinder structure is fixedly connected with upper inner ring platen, and the first solenoid valve can control gas circuit to upper
Pressurized cylinder structure gas supply drives the above piston rod of pressurized cylinder structure and upper inner ring platen thereon to decline and compresses bearing inner race
(15) upper surface, lower pressurized cylinder structure are fixed on lower bracket, the piston rod upper end of lower pressurized cylinder structure and lower inner ring pressure
Disk is fixedly connected, and second solenoid valve can control piston of the gas circuit to the lower pressurized cylinder structure of lower pressurized cylinder structure gas supply driving
Bar and lower inner ring platen thereon, which rise, compresses bearing inner race lower face, and measuring pen can be to the piston rod of upper pressurized cylinder structure
Height continuous value in upper surface is simultaneously messaging in control system, the longitudinal lifting drive of control system control, the first and second solenoid valve
It is acted with measuring pen.
2. the positive clearance detector of bearing according to claim 1, it is characterised in that：It is additionally provided with rotating driving device
(17) and lower rotating driving device (18), upper rotating driving device can drive the piston rod of pressurized cylinder structure to rotate, under
Rotating driving device can drive the piston rod of lower pressurized cylinder structure to rotate, and the upper rotating driving device of control system control is under
Rotating driving device acts.
3. the positive clearance detector of bearing according to claim 2, it is characterised in that：Rotating driving device is above and below
Motor, motor are driven upper and lower pressurized cylinder structurally live stopper rod by belt gear.
4. the positive clearance detector of bearing according to claim 1, it is characterised in that：The upper bracket is equipped with one and is oriented to
The tache motorice of bearing holder (housing, cover) (19), longitudinal lifting drive is fixed with lifting guiding axis (20), and lifting guiding axis sliding plugs
In in guiding axis bearing sleeve, lifting guiding axis lower end is fixedly connected with upper pressurized cylinder structure, and outer ring locating ring is fixed on pressurization
The cylinder body lower end of air cylinder structure.
5. the positive clearance detector of bearing according to claim 1, it is characterised in that：It is additionally provided with an automatic alignment device,
Including be fixed on lower bracket casing (21), can rotate be inserted in casing to positive axis (22), be sheathed on on positive axis
Elastomer (23) and the ejector pin (24) being inserted in in positive axis upper end can be rotated, the ejector pin upper end is tight against lower pressurized cylinder
The piston-rod lower end face of structure is more than positive axis in upper end outer diameter the T-shaped structure of lower end outer diameter, and elastomer both ends are respectively tight against this
The step surface and lower end madial wall of T-shaped structure.
6. the positive clearance detector of bearing according to claim 5, it is characterised in that：The ejector pin upper surface is globular arc
Face.
7. the positive clearance detector of bearing according to claim 1, it is characterised in that：The handling system includes that fork material drives
Dynamic device (25), cross sliding driving device (26) and material fork (27), the cross sliding driving device are fixed on workbench, traversing driving
Device can drive fork material driving device to move along a straight line in the horizontal plane, and fork material driving device can drive material fork in the horizontal plane
It moves along a straight line along the direction vertical with fork material driving device moving direction, the assembly line and workbench upper bearing (metal) locating platform water
Flat alignment linking.
8. the positive clearance detector of bearing according to claim 7, it is characterised in that：It is additionally provided with defective work rewinding dress
It sets, including rewinding holder (28), rewinding cylinder (29), defective work pallet (30), discharge cylinder (31) and defective work feed bin
(32), the rewinding holder is fixed below workbench, and the cylinder body of rewinding cylinder is fixed on rewinding holder, the work of rewinding cylinder
Stopper rod is connected with defective work pallet lower end, and defective work pallet upper end can be with workbench upper bearing (metal) locating platform horizontal alignment
Linking, is formed with the inclined ramp that one end is higher than the other end on defective work feed bin, the inclined ramp upper end be able to do not conform to
The alignment linking of lattice product push-plate upper surface, discharge cylinder is fixed on rewinding holder, and the piston rod of discharge cylinder can will be unqualified
Bearing on product push-plate is released into defective work feed bin inclined ramp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410718379.XA CN105716562B (en) | 2014-12-01 | 2014-12-01 | The positive clearance detector of bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410718379.XA CN105716562B (en) | 2014-12-01 | 2014-12-01 | The positive clearance detector of bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105716562A CN105716562A (en) | 2016-06-29 |
| CN105716562B true CN105716562B (en) | 2018-07-27 |
Family
ID=56146094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410718379.XA Active CN105716562B (en) | 2014-12-01 | 2014-12-01 | The positive clearance detector of bearing |
Country Status (1)
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| CN (1) | CN105716562B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106092026B (en) * | 2016-08-23 | 2019-01-15 | 宁波中亿自动化装备有限公司 | A kind of wheel hub axial direction clearance detector |
| CN106481676B (en) * | 2016-12-01 | 2018-08-10 | 江苏康斯特智能装备有限公司 | Hub bearing end-play matching machine |
| CN108303011B (en) * | 2018-03-20 | 2023-11-14 | 宁波恒帅股份有限公司 | Automatic detection and correction equipment for motor axial clearance |
| CN108940924B (en) * | 2018-09-11 | 2023-07-04 | 中国计量大学 | Automatic quality detection and sorting method and device for plane thrust bearing retainer finished product |
| CN109211567B (en) * | 2018-10-16 | 2020-06-09 | 东莞理工学院 | Full-automatic bearing detection machine for machine manufacturing system |
| CN110645906A (en) * | 2019-10-12 | 2020-01-03 | 中国兵器装备集团自动化研究所 | Primer depth detection device and system and use method thereof |
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| JP2009063515A (en) * | 2007-09-07 | 2009-03-26 | Nsk Ltd | Bearing-measuring instrument |
| CN201293629Y (en) * | 2008-11-13 | 2009-08-19 | 浙江新昌皮尔轴承有限公司 | Pneumatic axial play detector |
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| CN203572466U (en) * | 2013-10-15 | 2014-04-30 | 浙江四和机械有限公司 | Detection system used for detecting positive play of wheel hub unit |
| CN204240972U (en) * | 2014-12-01 | 2015-04-01 | 昆山康斯特精密机械有限公司 | The positive clearance detector of bearing |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009063515A (en) * | 2007-09-07 | 2009-03-26 | Nsk Ltd | Bearing-measuring instrument |
| CN201293629Y (en) * | 2008-11-13 | 2009-08-19 | 浙江新昌皮尔轴承有限公司 | Pneumatic axial play detector |
| CN202471042U (en) * | 2012-03-26 | 2012-10-03 | 昆山福维斯精密机械有限公司 | Automobile hub bearing axial play measurement instrument |
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| CN105716562A (en) | 2016-06-29 |
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Effective date of registration: 20211223 Address after: 215300 No. 1000, Wulian Road, Yushan Town, Kunshan City, Suzhou City, Jiangsu Province Patentee after: JIANGSU KANGSITE INTELLIGENT EQUIPMENT Co.,Ltd. Address before: 215313 building 3, No. 367, Youbi Road, Zhoushi Town, Kunshan City, Suzhou City, Jiangsu Province Patentee before: KUNSHAN CONSUMMATE EXACTITUDE MACHINE Co.,Ltd. |
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