CN106238762A - Pneumatic rotary axle is utilized to drive the chuck controlled - Google Patents
Pneumatic rotary axle is utilized to drive the chuck controlled Download PDFInfo
- Publication number
- CN106238762A CN106238762A CN201610701637.2A CN201610701637A CN106238762A CN 106238762 A CN106238762 A CN 106238762A CN 201610701637 A CN201610701637 A CN 201610701637A CN 106238762 A CN106238762 A CN 106238762A
- Authority
- CN
- China
- Prior art keywords
- hollow mandrel
- air
- revolving body
- air cavity
- rammer
- 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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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/24—Chucks characterised by features relating primarily to remote control of the gripping means
- B23B31/30—Chucks characterised by features relating primarily to remote control of the gripping means using fluid-pressure means in the chuck
Abstract
The present invention relates to the use of Pneumatic rotary axle and drive the chuck controlled, including revolving body, some jaws, air rammer and hollow mandrel, revolving body is rotatably connected at one end of mounting seat, and hollow mandrel is arranged at the middle part of revolving body and one end of hollow mandrel is coaxial docking with the outlet of feed pipe；Air rammer can be socketed on this hollow mandrel slidably along hollow mandrel, and air rammer is connected with revolving body elasticity also by the elastic component of the axial elasticity deformation along hollow mandrel；Revolving body is internally provided with revolution air cavity, mounting seat is provided with and turns round the air inlet that air cavity connects, and the outside of air rammer is provided with stress surface, and revolution air cavity is connected with the side of stress surface by pipeline.The present invention uses three jaws of pneumatic control chuck to synchronize centripetal motion to clamp tubing, it is not necessary to changes chuck and is just suitable for the tubing of plurality of specifications, provides cost performance higher precision rotation axle class solution for domestic user.
Description
Technical field
The present invention relates to frock clamp field, especially utilize Pneumatic rotary axle to drive the chuck controlled for a kind of.
Background technology
Along with the development of Numeric Control Technology, for reaching high quality and high-precision processing effect, special to special workpiece
It is that thin-wall pipes carries out the most accurate clamping, it appears be even more important.The precision rotation of overwhelming majority numerical control machine tool at present
The precise thin-wall tubing clamping form that axle (main shaft) is used is collet or the structure of cylinder external scroll chuck.
The rotary shaft (main shaft) using collet structure must be joined according to the thin-wall pipes external diameter size that it clamps and made phase
Answer the collet in aperture, so change collet according to caliber frequently, not only increase workload, also greatly increases
Production cost, especially when clamping the precise thin-wall tubing of external diameter less (less than 2mm), the chucking power of collet cannot be adjusted
Joint, easy disfiguring workpiece and clamping precision be difficult to ensure that, these constrain numerical control machine tool the most significantly to many specifications tubule
The precise thin-wall tubing in footpath carries out high-accuracy processing.
Use the rotary shaft (main shaft) of cylinder external scroll chuck structure, for preventing the driving trachea of gas pawl when rotated
It is wound around, traditional gas pawl structure is improved, frame for movement is external along the direction parallel with rotary shaft, and by outward
Putting one crank connecting rod sliding block mechanism of air cylinder driven to control the folding of scroll chuck, this mechanism structure is complicated, and volume is big, cost
Height, seldom uses in addition to special processing purposes.
Summary of the invention
Present invention aim at solving above-mentioned technical problem and provide a kind of pneumatic type scroll chuck, use modularity to set
Meter, is integrated in one high-accuracy pneumatic scroll chuck with electric rotating machine, and by the built-in sealing of control gas circuit of scroll chuck, should
Compact structure is light, provides a kind of novel precision rotation axle complex optimum solution for processing precise light-wall pipe part,
Concrete technical scheme is as follows:
Utilize Pneumatic rotary axle to drive the chuck controlled, be connected to be internally provided with the mounting seat of feed pipe, if including revolving body
Dry jaw, air rammer and hollow mandrel, described revolving body is rotatably connected at one end of described mounting seat, described hollow
Mandrel is arranged at the outlet of the middle part of described revolving body and one end of hollow mandrel and described feed pipe and is coaxial docking；Described gas
Dynamic piston can be socketed on this hollow mandrel slidably along hollow mandrel, and air rammer is also by can be along the axle of hollow mandrel
It is connected with described revolving body elasticity to elastically-deformable elastic component；Described revolving body is internally provided with revolution air cavity, described installation
Being provided with the air inlet connected with described revolution air cavity on seat, the outside of described air rammer is provided with stress surface, described revolution
Air cavity is connected with the side of described stress surface by pipeline, thus makees via described air inlet and revolution air cavity at gases at high pressure
When the stress surface of described air rammer, air rammer overcomes described elastic component elastic force along the axial shifting of described hollow mandrel
Dynamic；Described some jaws are arranged on the port of export week side of described hollow mandrel radially movablely, and described air rammer with
Described jaw is in transmission connection, described air rammer under the effect of gases at high pressure or elastic component reciprocal along described hollow mandrel
Time mobile, air rammer drives the centripetal motion of described jaw or centrifugal motion.
The described Pneumatic rotary axle that utilizes drives the chuck controlled, and it designs further and is, described air rammer passes through
Jaw clamps is connected with described jaw, and the exterior circumferential of described air rammer is symmetrically arranged with some connecting rods, the end of this connecting rod
Being tiltedly installed with drive block, drive block has relative two drive surface that is first drive surface, the second drive surface；Described jaw presss from both sides
Tool can be arranged on the outside of revolving body centripetal or centrifugal motion, and described jaw clamps is towards the one of described hollow mandrel
Side is provided with the driving chamber that some and described guide pad is corresponding, described driving intracavity have with described first drive surface, second
Two passive faces being obliquely installed that drive surface is corresponding, and the outside in described driving chamber is provided with notch；Described connecting rod is sliding
Move in described notch thus described drive block slides on described driving intracavity, and described first drive surface, the second drive surface
Face passive with said two offsets respectively.
The described Pneumatic rotary axle that utilizes drives the chuck controlled, and it designs further and is, described revolving body is described
The outer radial of hollow mandrel is provided with some and described jaw gathering sill one to one, and described jaw clamps is slidably connected to
Described gathering sill.
The described Pneumatic rotary axle that utilizes drives the chuck controlled, and it designs further and is, described gathering sill two twenty percent
Being provided with needle roller unit between one group, and two gathering sills with group, described needle roller unit is rotatably provided with some along institute
Stating the needle roller of gathering sill directional spreding, the middle part of described jaw clamps contacts with described needle roller.
The described Pneumatic rotary axle that utilizes drives the chuck controlled, and it designs further and is, described needle roller unit also wraps
Including the needle roller bracket being arranged between two gathering sills with group, described some needle rollers are arranged in described needle roller rotationally
In bracket.
Described utilize Pneumatic rotary axle to drive the chuck controlled, its further design be, described one group of gathering sill with
And the needle roller unit between reorganization gathering sill forms a guiding mechanism, the lateral symmetry of any one jaw clamps is provided with two
Individual guiding mechanism.
The described Pneumatic rotary axle that utilizes drives the chuck controlled, and it designs further and is, arranges in described revolving body
Having the driving air cavity being positioned at outside described air rammer, the external stability of described air rammer is provided with to be positioned at and drives air cavity
Force block, correspondingly, this force block can slide in described driving air cavity with air rammer；Described revolution air cavity by pipeline with
Driving air cavity connects, and described force block is described stress surface towards the side of driving air cavity air inlet.
The described Pneumatic rotary axle that utilizes drives the chuck controlled, and it designs further and is, described jaw has three, and
And it is uniformly distributed in the port of export week side of described hollow mandrel.
Described utilize Pneumatic rotary axle to drive the chuck controlled, its further design be, described revolving body includes point
It is not socketed in air cavity portion, connecting portion and the homework department on feed pipe end, hollow mandrel, air rammer；Described air cavity portion turns
Moving and be arranged on described connection seat end, the outer rim in this air cavity portion is provided with cannelure, and this cannelure and the port being connected seat coordinate
Form described revolution air cavity；Rotating part is provided with embedded groove in the middle part of the side in jaw direction, and described connecting portion is embedded in described
In embedded groove, described homework department is fixing with the another side of described connecting portion to be connected；Described connecting portion, the top of homework department are arranged
Having the pipeline connected with described revolution air cavity, the bottom of described homework department is provided with the driving air cavity with described pipeline connection.
The described Pneumatic rotary axle that utilizes drives the chuck controlled, and it designs further and is, described elastic component is spring,
This spring housing be connected to the outside of described hollow mandrel and its two ends respectively with inwall and the inner side of air rammer of revolving body
End connects.
The beneficial effects of the present invention is:
1) this precision rotation axle is as Digit Control Machine Tool and the core component of precision movement platform industry, uses pneumatic control chuck
Three jaws synchronize centripetal motion and clamp tubing, it is not necessary to change chuck and be just suitable for the tubing of plurality of specifications, for domestic user
Cost performance higher precision rotation axle class solution is provided.
2) scroll chuck using pneumatic mode to control, compared to traditional alligator clamp hair style structure, has chucking power big
Little adjustable, the tubing guidance quality of clamping and good etc. the advantage of proper alignment, be particularly well-suited to the clamping of the little tubing in elongated footpath.
3) relative to the rotary shaft of collet structure, the contact area of this design clamping workpiece portion is big, and workpiece is difficult to
Deform, and clamping process will not produce as constantly contacting generation abrasion deformation between collet and chuck handle,
Service life is long.
4) Pneumatic clamping that scroll chuck uses, the control mode of spring reset, control the built-in Seal Design of gas circuit, this sets
Meter not only solves the problem being wound around trachea in scroll chuck rotary course, and compact conformation, easy to maintenance.
5) use " labyrinth " formula waterproofing design, improve sealing property, it is to avoid the water smoke in the course of processing enters into three-jaw card
In dish and DD motor, client can be met special tubes is carried out the wet demand cut.
6) use modular combination design, rotating part and piece-holder part are separately designed and assembling, finally by this
Two parts are sealedly connected, and both are the separate interchange sexual function possessing again parts, install and the side of maintenance
Just, under ensureing performance condition, rationally reducing manufacture and maintenance cost, cost performance is high.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is revolving body, jaw clamps and clamping jaw structure schematic diagram.
Fig. 3 is air rammer structural representation.
Fig. 4 is jaw clamps structural representation.
Fig. 5 is rotary structure schematic diagram.
Detailed description of the invention
Below in conjunction with Figure of description and embodiment, the present invention is further described:
As it can be seen, this utilizes Pneumatic rotary axle to drive the chuck controlled to be connected to be internally provided with the mounting seat 5 of feed pipe 6,
Including revolving body 1, some jaws 2, air rammer 3 and hollow mandrel 4, revolving body 1 is rotatably connected at the one of mounting seat
End, hollow mandrel 4 is arranged at the outlet of the middle part of revolving body and one end of hollow mandrel and feed pipe 6 and is coaxial docking；Pneumatic
Piston 3 can be socketed on this hollow mandrel slidably along hollow mandrel 4, and air rammer 3 is also by can be along hollow mandrel 4
The elastic component of axial elasticity deformation is connected with revolving body 1 elasticity；Revolving body 1 is internally provided with revolution air cavity 11, and mounting seat sets
Being equipped with and turn round the air inlet 51 that air cavity 11 connects, the outside of air rammer 3 is provided with stress surface, and revolution air cavity 11 passes through pipeline
Connect with the side of stress surface, thus act on air rammer 3 at gases at high pressure via air inlet 51 and revolution air cavity 11
During stress surface, air rammer 3 overcomes elastic component elastic force moving axially along hollow mandrel 4；Some jaws 2 set radially movablely
Put the port of export week side at hollow mandrel 4, and air rammer 3 be in transmission connection with jaw 2, air rammer 3 gases at high pressure,
Under the effect of elastic component 9 along hollow mandrel 4 move back and forth time, air rammer 3 drives the centripetal motion of jaw 2 or centrifugal motion.
Air rammer 3 is connected with jaw 2, if the exterior circumferential of air rammer 3 is symmetrically arranged with involvement by jaw clamps 7
Bar, the sloped-end of this connecting rod is provided with drive block 31, and drive block 31 has relative two drive surface that is first drive surface
311, the second drive surface 312；Jaw clamps 7 can be arranged on the outside of revolving body 1, and jaw folder centripetal or centrifugal motion
Tool 7 is provided with some driving chambeies 71 corresponding with guide pad towards the side of hollow mandrel 4, has and first in driving chamber 71
Two passive faces 711 being obliquely installed that drive surface the 311, second drive surface 312 is corresponding, and drive the outside in chamber 71 to arrange
There is notch；Rod slide is in notch thus drive block 31 slides in driving chamber 71, and the first drive surface 311, second drives
Dynamic face 312 offsets with two passive faces 711 respectively.Specifically, jaw 2 has three, and is uniformly distributed in going out of hollow mandrel 4
Mouth end week side.Elastic component is spring 9, this spring housing be connected to the outside of hollow mandrel 4 and its two ends respectively with in revolving body 1
The medial extremity of wall and air rammer 3 connects.
Air rammer overcomes the resistance of elastic component to move towards mounting seat direction under the effect of gases at high pressure, now jaw folder
Have and driven centripetal motion by air rammer, thus workpiece is clamped in the centripetal motion of jaw；When gases at high pressure are removed, air rammer exists
Return under the elastic force effect of elastic component, now jaw centrifugal motion unclamps workpiece.
Revolving body 1 is provided with some and jaw 2 gathering sill 12 one to one, jaw in the outer radial of hollow mandrel 4
Fixture 7 is slidably connected to gathering sill 12.
It is provided with needle roller unit 8, needle roller unit between 12 liang of twenty percents of gathering sill one group, and two gathering sills 12 with group
8 are rotatably provided with some needle rollers 81 along gathering sill 12 directional spreding, and the middle part of jaw clamps 7 contacts with needle roller.
Needle roller unit 8 also includes the needle roller bracket 82 being arranged between two gathering sills 12 with group, and some needle rollers can turn
It is arranged in needle roller bracket dynamicly.
Needle roller unit 8 between one group of gathering sill 12 and reorganization gathering sill 12 forms a guiding mechanism, any one
The lateral symmetry of jaw clamps 7 is provided with two guiding mechanisms.
Being provided with the driving air cavity 16 being positioned at outside air rammer 3 in revolving body 1, the external stability of air rammer 3 is arranged
Having and be positioned at the force block 32 driving air cavity, correspondingly, this force block can slide in driving air cavity with air rammer 3；Revolution
Air cavity 11 is connected with driving air cavity by pipeline, and force block is stress surface towards the side of driving air cavity air inlet.
Revolving body 1 includes the air cavity portion 13 being socketed in respectively on feed pipe end, hollow mandrel 4, air rammer 3, connects
Portion 14 and homework department 15；Air cavity portion rotates and is arranged on connection seat end, and the outer rim in this air cavity portion is provided with cannelure, this annular
Groove cooperatively forms revolution air cavity 11 with the port being connected seat；Rotating part is provided with embedded groove in the middle part of the side in jaw 2 direction,
Connecting portion is embedded in embedded groove, and homework department is fixing with the another side of connecting portion to be connected；Connecting portion, the top of homework department are provided with
The pipeline connected with revolution air cavity 11, the bottom of homework department is provided with the driving air cavity 16 with pipeline connection.
The beneficial effects of the present invention is:
1) this precision rotation axle is as Digit Control Machine Tool and the core component of precision movement platform industry, uses pneumatic control chuck
Three jaws synchronize centripetal motion and clamp tubing, it is not necessary to change chuck and be just suitable for the tubing of plurality of specifications, for domestic user
Cost performance higher precision rotation axle class solution is provided.
2) scroll chuck using pneumatic mode to control, compared to traditional alligator clamp hair style structure, has chucking power big
Little adjustable, the tubing guidance quality of clamping and good etc. the advantage of proper alignment, be particularly well-suited to the clamping of the little tubing in elongated footpath.
3) relative to the rotary shaft of collet structure, the contact area of this design clamping workpiece portion is big, and workpiece is difficult to
Deform, and clamping process will not produce as constantly contacting generation abrasion deformation between collet and chuck handle,
Service life is long.
4) Pneumatic clamping that scroll chuck uses, the control mode of spring reset, control the built-in Seal Design of gas circuit, this sets
Meter not only solves the problem being wound around trachea in scroll chuck rotary course, and compact conformation, easy to maintenance.
5) use " labyrinth " formula waterproofing design, improve sealing property, it is to avoid the water smoke in the course of processing enters into three-jaw card
In dish and DD motor, client can be met special tubes is carried out the wet demand cut.
6) use modular combination design, rotating part and piece-holder part are separately designed and assembling, finally by this
Two parts are sealedly connected, and both are the separate interchange sexual function possessing again parts, install and the side of maintenance
Just, under ensureing performance condition, rationally reducing manufacture and maintenance cost, cost performance is high.
Claims (10)
1. utilize Pneumatic rotary axle to drive the chuck controlled, be connected to be internally provided with the mounting seat of feed pipe, it is characterised in that
Including revolving body, some jaws, air rammer and hollow mandrel, described revolving body is rotatably connected at described mounting seat
One end, it is same with the outlet of described feed pipe that described hollow mandrel is arranged at the middle part of described revolving body and one end of hollow mandrel
Axle docks；Described air rammer can be socketed on this hollow mandrel slidably along hollow mandrel, and air rammer is also by can
Elastic component along the axial elasticity deformation of hollow mandrel is connected with described revolving body elasticity；Described revolving body is internally provided with revolution
Air cavity, described mounting seat is provided with the air inlet connected with described revolution air cavity, and the outside of described air rammer is provided with and is subject to
Power face, described revolution air cavity is connected with the side of described stress surface by pipeline, thus at gases at high pressure via described air inlet
And revolution air cavity is when acting on the stress surface of described air rammer, air rammer overcomes described elastic component elastic force along described hollow
Moving axially of mandrel；Described some jaws are arranged on the port of export week side of described hollow mandrel, and institute radially movablely
State air rammer to be in transmission connection with described jaw, described air rammer under the effect of gases at high pressure or elastic component along described
When hollow mandrel moves back and forth, air rammer drives the centripetal motion of described jaw or centrifugal motion.
The chuck utilizing Pneumatic rotary axle to drive control the most according to claim 1, it is characterised in that described air rammer
Being connected with described jaw by jaw clamps, the exterior circumferential of described air rammer is symmetrically arranged with some connecting rods, this connecting rod
Sloped-end is provided with drive block, and drive block has relative two drive surface that is first drive surface, the second drive surface；Described folder
Pawl fixture can be arranged on the outside of revolving body centripetal or centrifugal motion, and described jaw clamps is towards described hollow mandrel
Side be provided with the driving chamber that some and described guide pad is corresponding, described driving intracavity have with described first drive surface,
Two passive faces being obliquely installed that second drive surface is corresponding, and the outside in described driving chamber is provided with notch；Described company
Bar slides in described notch thus described drive block slides on described driving intracavity, and described first drive surface, second drives
Face passive with said two respectively, dynamic face offsets.
The chuck utilizing Pneumatic rotary axle to drive control the most according to claim 2, it is characterised in that described revolving body exists
The outer radial of described hollow mandrel is provided with some and described jaw gathering sill one to one, and described jaw clamps slides even
It is connected to described gathering sill.
The chuck utilizing Pneumatic rotary axle to drive control the most according to claim 3, it is characterised in that described gathering sill two
Being provided with needle roller unit between twenty percent one group, and two gathering sills with group, described needle roller unit is rotatably provided with some
Along the needle roller of described gathering sill directional spreding, the middle part of described jaw clamps contacts with described needle roller.
The chuck utilizing Pneumatic rotary axle to drive control the most according to claim 4, it is characterised in that described needle roller unit
Also including the needle roller bracket being arranged between two gathering sills with group, described some needle rollers are arranged in described rotationally
In needle roller bracket.
The chuck utilizing Pneumatic rotary axle to drive control the most according to claim 4, it is characterised in that described one group of guiding
Needle roller unit between groove and reorganization gathering sill forms a guiding mechanism, and the lateral symmetry of any one jaw clamps is arranged
There are two guiding mechanisms.
The chuck utilizing Pneumatic rotary axle to drive control the most according to claim 1, it is characterised in that in described revolving body
Being provided with the driving air cavity being positioned at outside described air rammer, the external stability of described air rammer is provided with and is positioned at driving air cavity
Interior force block, correspondingly, this force block can slide in described driving air cavity with air rammer；Described revolution air cavity is by pipe
Road connects with driving air cavity, and described force block is described stress surface towards the side of driving air cavity air inlet.
The chuck utilizing Pneumatic rotary axle to drive control the most according to claim 7, it is characterised in that described revolving body bag
Include air cavity portion, connecting portion and the homework department being socketed in respectively on feed pipe end, hollow mandrel, air rammer；Described air cavity
Portion rotates and is arranged on described connection seat end, and the outer rim in this air cavity portion is provided with cannelure, this cannelure and the port being connected seat
Cooperatively form described revolution air cavity；Rotating part is provided with embedded groove in the middle part of the side in jaw direction, and described connecting portion is embedded in
In described embedded groove, described homework department is fixing with the another side of described connecting portion to be connected；Described connecting portion, the top of homework department
Being provided with the pipeline connected with described revolution air cavity, the bottom of described homework department is provided with the driving gas with described pipeline connection
Chamber.
The chuck utilizing Pneumatic rotary axle to drive control the most according to claim 1, it is characterised in that described jaw has three
Individual, and it is uniformly distributed in the port of export week side of described hollow mandrel.
The chuck utilizing Pneumatic rotary axle to drive control the most according to claim 1, it is characterised in that described elastic component
For spring, this spring housing be connected to the outside of described hollow mandrel and its two ends respectively with inwall and the air rammer of revolving body
Medial extremity connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610701637.2A CN106238762B (en) | 2016-08-22 | 2016-08-22 | Utilize the chuck of Pneumatic rotary axle drive control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610701637.2A CN106238762B (en) | 2016-08-22 | 2016-08-22 | Utilize the chuck of Pneumatic rotary axle drive control |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106238762A true CN106238762A (en) | 2016-12-21 |
| CN106238762B CN106238762B (en) | 2018-04-03 |
Family
ID=57595069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610701637.2A Active CN106238762B (en) | 2016-08-22 | 2016-08-22 | Utilize the chuck of Pneumatic rotary axle drive control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106238762B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106891145A (en) * | 2017-02-28 | 2017-06-27 | 珠海格力智能装备有限公司 | Cartridge device and the insulating tube with it install equipment |
| CN106891139A (en) * | 2017-02-28 | 2017-06-27 | 珠海格力智能装备有限公司 | Expansion mechanism and the insulating tube with it install equipment |
| CN107322026A (en) * | 2017-08-17 | 2017-11-07 | 无锡蠡湖增压技术股份有限公司 | Fixture assembly system |
| CN108489447A (en) * | 2018-01-08 | 2018-09-04 | 成都飞机工业（集团）有限责任公司 | Detect the pneumatic device of coaxiality of inner hole |
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| CN206153603U (en) * | 2016-08-22 | 2017-05-10 | 昆山允可精密工业技术有限公司 | Utilize chuck of pneumatic rotation axis driving control |
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| US20100284756A1 (en) * | 2009-05-11 | 2010-11-11 | Tung Fu-Hsiang | Tool clamping device of tool seat |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106891145A (en) * | 2017-02-28 | 2017-06-27 | 珠海格力智能装备有限公司 | Cartridge device and the insulating tube with it install equipment |
| CN106891139A (en) * | 2017-02-28 | 2017-06-27 | 珠海格力智能装备有限公司 | Expansion mechanism and the insulating tube with it install equipment |
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| CN108489447A (en) * | 2018-01-08 | 2018-09-04 | 成都飞机工业（集团）有限责任公司 | Detect the pneumatic device of coaxiality of inner hole |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106238762B (en) | 2018-04-03 |
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