CN108917563A - A kind of portable piston pair axiality detection device - Google Patents
A kind of portable piston pair axiality detection device Download PDFInfo
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- CN108917563A CN108917563A CN201810971372.7A CN201810971372A CN108917563A CN 108917563 A CN108917563 A CN 108917563A CN 201810971372 A CN201810971372 A CN 201810971372A CN 108917563 A CN108917563 A CN 108917563A
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- 238000001514 detection method Methods 0.000 title claims abstract description 42
- 238000009827 uniform distribution Methods 0.000 claims abstract description 30
- 238000006073 displacement reaction Methods 0.000 claims abstract description 11
- 230000006698 induction Effects 0.000 claims abstract description 4
- 230000037081 physical activity Effects 0.000 claims abstract description 3
- 230000008054 signal transmission Effects 0.000 claims description 4
- 230000003044 adaptive effect Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000004044 response Effects 0.000 claims description 3
- 238000013500 data storage Methods 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000009471 action Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 241000222712 Kinetoplastida Species 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B5/25—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
- G01B5/252—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes for measuring eccentricity, i.e. lateral shift between two parallel axes
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The invention discloses a kind of portable piston pair axiality detection devices, including bracket, buoyancy body, buoyancy body Self-centering device, connecting shaft, sensor；Setting connecting shaft is connected in the piston other side；The connecting shaft other end is connected and fixed with bracket；Buoyancy body activity is located in bracket, and buoyancy body one end end face is equipped with cross recess, and floating body axis passes through cross recess geometric center, is equipped with sensor respectively in four slots of circumference uniform distribution；Buoyancy body passes through buoyancy body Self-centering device for buoyancy body axis location to position inner hole of cylinder the center point；Connecting shaft connects one locating shaft of setting close to floating side, and connecting shaft, locating shaft and the piston coaxial heart are arranged, and the cross recess geometric center position of buoyancy body is inserted into locating shaft free end, and four sensor contacts or induction and opposite can generate displacement；The registration in buoyancy body axle center and locating shaft axle center, i.e. the axis registration in the buoyancy body present position inner hole of cylinder center of circle and the piston are obtained by four sensors.
Description
Technical field
The invention belongs to concentricity detection device technical fields, and in particular to a kind of portable piston pair concentricity detection dress
It sets.
Background technique
Piston pair is one of the matching pair that machinery industry is most widely used.Such as it is hydraulic cylinder piston and inner hole of cylinder, mixed
Solidifying soil pumping system piston and conveying inner hole of cylinder etc..Concentricity between piston and inner hole of cylinder is that piston pair is mostly important
Geometric accuracy index.In the piston pair course of work, it if concentricity is easily overproof, will cause piston that eccentric wear occurs, occur larger
Noise and vibration, reduce piston pair service life.In order to improve piston pair product quality, not only need in process of production into
The detection of row concentricity carries out concentricity in after-sale service and detects no less important.Therefore, how to realize in piston pair after-sale service
It easily detects concentricity, carry out mechanical fault diagnosis, become a technical problem.Regrettably, it is suitable for currently, there is no
The portable piston pair axiality detection device and method of after-sale service.
Summary of the invention
Purpose：In order to overcome the deficiencies in the prior art, the present invention provides a kind of portable piston pair concentricity inspection
Device is surveyed, after-sale service quality and work can be improved in the convenient quickly and accurately detection piston pair concentricity of service field after sale
Fill in secondary service performance.
Technical solution：In order to solve the above technical problems, the technical solution adopted by the present invention is：
A kind of portable piston pair axiality detection device, piston cylinder to be measured include piston, cylinder barrel, piston rod；Piston cooperation peace
In cylinder barrel, piston side connection setting piston rod；It is characterized in that：The detection device includes bracket, buoyancy body, floating
Body Self-centering device, connecting shaft, sensor；
Setting connecting shaft is connected in the piston other side；The connecting shaft and the piston coaxial heart are arranged, the connecting shaft other end with
Bracket is connected and fixed；The axle center of connecting shaft and the center line of bracket are coaxially disposed；
Buoyancy body activity is located in the bracket, and described buoyancy body one end end face is equipped with cross recess, and floating body axis passes through cross
Slot geometric center, sensor is equipped in four slots of circumference uniform distribution respectively, and four sensors are symmetrical centered on buoyancy body axle center
Setting；
The buoyancy body is round to position inner hole of cylinder by the axis location of the buoyancy body by buoyancy body Self-centering device
At the heart；Cross recess geometric center in the i.e. described buoyancy body is overlapped with the inner hole of cylinder center of circle；
The connecting shaft connects one locating shaft of setting close to floating side, and locating shaft and the piston coaxial heart are arranged, and locating shaft is free
The cross recess geometric center position of end insertion buoyancy body, sets according to the response demand of sensor and four sensor contacts or induction
It sets, and opposite can generate displacement between buoyancy body and locating shaft, obtain buoyancy body axle center and locating shaft axis by four sensors
The axis registration of the registration of the heart, i.e. the buoyancy body present position inner hole of cylinder center of circle and the piston.
When the present position inner hole of cylinder center of circle is overlapped with the axis of the piston, then locating shaft and institute in the connecting shaft
The cross recess geometric center stated in buoyancy body is overlapped, and four sensor feedback signals of circumference uniform distribution are identical；When locating position
When setting the inner hole of cylinder center of circle and not being overlapped with the axis of the piston, cross recess geometric center and locating shaft in the buoyancy body are not
It is overlapped, buoyancy body generates displacement under the action of buoyancy body Self-centering device, and four sensors is driven to generate relative to locating shaft
Displacement, the sensor feedback signal of four of circumference uniform distribution are different.
Preferably, the portable piston pair axiality detection device, it is characterised in that：The bracket is also set
It is equipped with for the bracket mounting base with the connection axis connection, the connecting pin of connecting shaft is provided with round boss structure, bracket peace
Dress seat is provided with the round notch matched with round boss structure；Bracket and connecting shaft pass through round notch, circle
Shape boss structure is coupled fixation, and realizes coaxial positioning.
Preferably, the portable piston pair axiality detection device, it is characterised in that：The carriage center
Position is additionally provided with spring, and buoyancy body axial direction side is connect with the spring, the spring be placed in the bracket with it is described
Between buoyancy body, elastic force axially along is provided to the buoyancy body.
Preferably, the portable piston pair axiality detection device, it is characterised in that：The buoyancy body is certainly
Centring means includes three slideways of three supporting legs and bracket circumference uniform distribution；The section of the bracket installation floating body portion is circle
Ring structure, buoyancy body are movably arranged in bracket, using carriage center axis as the center of circle, three slideways of the bracket circumference uniform distribution,
Slideway is arranged along holder radius direction, and the sliding rail between buoyancy body outer peripheral surface and inner wall of cylinder is travelled to and fro between as three supporting legs
Road, by the movements of three supporting legs by the axis location of the buoyancy body to position inner hole of cylinder the center point.
Further, it is equipped with spring and banking pin in the slideway, by spring force by the supporting leg along slideway
The buoyancy body is slided to, the banking pin prevents spring by the branch for limiting the supporting leg along the sliding scale of slideway
Leg pops up the bracket.
Further, the buoyancy body periphery is set as part pyramid like configuration, described supporting leg one end be set as with outside buoyancy body
The internal conical surface matched in week, supporting leg and the buoyancy body outer conical surface cooperate, and realize three supporting legs of circumference uniform distribution while stretching
Contracting, and stroke is identical, realizes adaptive centering.
Further, described supporting leg one end is equipped with arc surface, in order to smoothly contact with the inner hole of cylinder wall.
Preferably, the portable piston pair axiality detection device, it is characterised in that：The sensor is
Pressure sensor, inductance sensor, laser displacement sensor.
The present invention also provides a kind of portable piston pair concentricity detection systems, it is characterised in that：Including above-mentioned portable
Formula piston pair axiality detection device, further includes controller, and the controller carries out signal for acquiring the sensor signal
Conversion, concentricity calculate, concentricity is analyzed, data storage.
Further, the portable piston pair concentricity detection system, it is characterised in that：The controller with it is described
Wireless signal transmission is realized by ZIGBEE, bluetooth between sensor.
Beneficial effect：Portable piston pair axiality detection device provided by the invention, has that structure is simple, it is real to be easy to
It is existing, at low cost, applied widely, easy to adjust, the advantages that detection operation is flexible.Compared with existing axiality detection device, this
The principle, structure type of axiality detection device are all different in invention.It can be convenient quickly and accurately in service field after sale
Piston pair concentricity is detected, after-sale service quality and piston pair service performance are improved.
Detailed description of the invention
Fig. 1 is the structure chart of inventive piston pair axiality detection device；
Fig. 2 is the face A-A cross-sectional view in Fig. 1；
In figure：1. controller, 2. brackets, 3. supporting legs, 4. buoyancy bodies, 5. springs, 6. connecting shafts, 61 locating shafts, 7. sensors, 8.
Piston cylinder, 81. pistons, 82. cylinder barrels, 83. piston rods.
Specific embodiment
The present invention will be further explained combined with specific embodiments below.
As shown in Figure 1, being a kind of portable piston pair axiality detection device, for detecting the coaxial of piston cylinder 8 to be measured
Degree, i.e. concentricity between piston and inner hole of cylinder；Detection device includes controller 1, bracket 2, supporting leg 3, buoyancy body 4, spring
5, connecting shaft 6, locating shaft 61, sensor 7；
Piston cylinder 8 includes piston 81, cylinder barrel 82, piston rod 83；Piston 81 is fitted in cylinder barrel 82, the connection of 81 side of piston
Piston rod 83 is set, connects setting connecting shaft 6 in 81 other side of piston,
The connecting shaft 6 and the concentric setting of the piston 81,6 other end of connecting shaft are fixedly connected with bracket 2, connecting shaft 6
The coaxial arrangement of the center line of axle center and bracket, buoyancy body 4 are movably arranged in bracket, and the buoyancy body 4 is made by oneself by buoyancy body
Center device is by the axis location of the buoyancy body 4 to position inner hole of cylinder the center point；Cross recess in the i.e. described buoyancy body 4
Geometric center is overlapped with the 82 inner hole center of circle of cylinder barrel；
4 one end end face of buoyancy body be equipped with cross recess, 4 axis of buoyancy body pass through cross recess geometric center, the four of circumference uniform distribution
Sensor 7 is equipped in a slot respectively, four sensors are symmetrical arranged centered on 4 axle center of buoyancy body；
A locating shaft 61 is arranged close to the concentric connection in 4 side of buoyancy body in the connecting shaft 6, locating shaft 61 with piston 81 is concentric sets
It sets；Locating shaft 61 is inserted into the cross recess geometric center position of buoyancy body 4, is connect according to the response demand of sensor and four sensors
Touching or induction setting, and opposite displacement can be generated between buoyancy body and locating shaft；4 axle center of buoyancy body is obtained by four sensors
With the registration in 61 axle center of locating shaft, i.e. the axis registration in the buoyancy body present position inner hole of cylinder center of circle and the piston.
Working principle of the present invention is as follows：
When the cylinder barrel 82 inner hole center of circle in present position is overlapped with the axis of the piston 81, then in the connecting shaft locating shaft 61 with
Cross recess geometric center in the buoyancy body 4 is overlapped, and 7 feedback signal of sensor of four of circumference uniform distribution is identical；Work as institute
The place 82 inner hole center of circle of position cylinder barrel is with the axis of the piston 81 when not being overlapped, cross recess geometric center in the buoyancy body and
Locating shaft is not overlapped, and buoyancy body 4 generates displacement under the action of buoyancy body Self-centering device, drives four sensors relative to fixed
Position axis 61 generates displacement, and 7 feedback signal of sensor of four of circumference uniform distribution is different.
In the present embodiment, the buoyancy body Self-centering device by circumference uniform distribution on bracket 2 three slideways and three supporting legs 3
To realize；
The section that the bracket 2 is used to install 4 part of buoyancy body is cirque structure, and bracket 2 is sheathed in cylinder barrel 82, buoyancy body
4 are movably arranged in bracket, and the outer diameter of bracket 2 is not more than the internal diameter of cylinder barrel 82；Using 2 central axis of bracket as the center of circle, the bracket 2
Three slideways of circumference uniform distribution, slideway is arranged along holder radius direction, travels to and fro between 4 periphery of buoyancy body and cylinder barrel as three supporting legs 3
Sliding rail between 82 inner walls,
Spring 5 is additionally provided on the bracket 2, the buoyancy body 4 is connect with the spring 5, and the spring 5 is placed in the bracket
Between 2 and the buoyancy body 4, elastic force axially along is provided to the buoyancy body 4.
Be equipped with spring and banking pin in each slideway, the supporting leg 3 popped up along slideway by spring force described in
Bracket 2 slides to the buoyancy body 4, and the banking pin limits the supporting leg 3 along the sliding scale of slideway, prevents spring described
Supporting leg 3 pops up the bracket 2；
Described 4 one end of buoyancy body is equipped with outer conical surface, is connect with circumference uniform distribution three supporting legs 3 by cone match, realizes
Circumference uniform distribution three 3 simultaneous retractables of supporting leg when the buoyancy body 4 is axially moved along itself, and stroke is identical；It is described floating
Kinetoplast 4 is connect with the spring 5, it is ensured that outer conical surface in the buoyancy body 4 can always with three branch of circumference uniform distribution
3 internal conical surface of leg is cooperatively connected；The 4 other end end face of buoyancy body is equipped with cross recess, and 4 axis of buoyancy body passes through cross
Slot geometric center is equipped with the sensor 7 in four slots of circumference uniform distribution respectively.
Further preferably the bracket 2 is additionally provided with the bracket mounting base for connecting with the connecting shaft 6, connection
The connecting pin of axis 6 is provided with round boss structure, and bracket mounting base is provided with the round card slot matched with round boss structure
Structure；Bracket is coupled fixation by round notch, round boss structure with connecting shaft, and realizes coaxial positioning.
It is coaxial including above-mentioned portable piston pair the present invention also provides a kind of portable piston pair concentricity detection system
Detection device is spent, further includes controller 1, the controller 1 carries out signal conversion, coaxial for acquiring 7 signal of sensor
Degree calculates, concentricity is analyzed, data store etc.；Pass through the hands such as ZIGBEE, bluetooth between the controller 1 and the sensor 7
Duan Shixian wireless signal transmission.The bracket 2 is used to support entire detection device；2 circumference uniform distribution of bracket, three slideways, just
It is moved in the supporting leg 3 along slideway；Spring and banking pin are equipped in each slideway, by spring force by 3 edge of supporting leg
Slideway pop up the bracket 2, the banking pin limits the supporting leg 3 along slideway sliding scale, prevents spring by the branch
Leg 3 pops up the bracket 2；The bracket 2 is that the spring 5 provides support force；The bracket 2 is connected with the connecting shaft 6.Institute
Supporting leg 3 is stated to be placed in 2 circumference uniform distribution of bracket, three slideways, under the action of the spring can be free to slide along slideway, and
The bracket 2 will not be marked under banking pin effect；Described 3 one end of supporting leg be equipped with arc surface, in order to 82 inner hole of cylinder barrel
Wall smoothly contacts, circumference uniform distribution three 3 arc surface of supporting leg grindings simultaneously, it is ensured that precision consistency；The supporting leg 3 is another
One end is equipped with internal conical surface, in order to cooperate with 4 outer conical surface of buoyancy body, realizes that circumference uniform distribution three supporting legs 3 are same
When it is flexible, realize adaptive centering, circumference uniform distribution three 3 internal conical surfaces of supporting leg grindings simultaneously, it is ensured that precision is consistent
Property.Described 4 one end of buoyancy body is equipped with outer conical surface, is connect with circumference uniform distribution three supporting legs 3 by cone match, realizes institute
Circumference uniform distribution three 3 simultaneous retractables of supporting leg when buoyancy body 4 is axially moved along itself are stated, and stroke is identical；The floating
Body 4 is connect with the spring 5, it is ensured that outer conical surface in the buoyancy body 4 can always with circumference uniform distribution three supporting legs 3
Internal conical surface is cooperatively connected；The 4 other end end face of buoyancy body is equipped with cross recess, and 4 axis of buoyancy body passes through cross recess
Geometric center is equipped with the sensor 7 in four slots of circumference uniform distribution respectively.The spring 5 is placed in the bracket 2 and floats with described
Between kinetoplast 4,6 one end of connecting shaft described in elastic force axially along is provided to the buoyancy body 4 and the piston 81 is connected, and
Other end of external cylindrical surface is positioned to coaxial with the piston 81.
Further, the sensor 7 can for pressure sensor, inductance sensor, laser displacement sensor etc., and with institute
It states and realizes wireless signal transmission by means such as ZIGBEE, bluetooths between controller 1.
The course of work of the invention is as follows：
Before detection, the connecting shaft 6 is connected on the piston 81, and position to 81 coaxial state of piston.?
In detection process, by the hydraulic system on the engineering goods where the piston cylinder 8, by the piston 81 driving to the cylinder
The axial several positions of cylinder 82.In each position, heart action is made by oneself by the buoyancy body Self-centering device of portable detector, it will
Cross recess geometric center and institute of 4 axis location of buoyancy body to the 82 inner hole the center point of cylinder barrel, i.e., in the described buoyancy body 4
State the coincidence of the 82 inner hole center of circle of cylinder barrel.If piston 81 described in the position is overlapped with 82 center of circle of cylinder barrel, the connecting shaft leading portion
Cylindrical surface is overlapped with the cross recess geometric center in the buoyancy body 4, the 7 feedback signal phase of sensor of four of circumference uniform distribution
Together, otherwise 7 feedback signal of sensor is different.7 feedback signal of sensor radios to the controller 1 and completes to be somebody's turn to do
Position detection.The rest may be inferred, and after the axial all position signal acquisitions of the cylinder barrel 82 to be done, the controller 1 is carried out coaxially
Degree calculates.
The above is only a preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of piston pair axiality detection device, piston cylinder to be measured includes piston, cylinder barrel, piston rod；Piston is fitted to
In cylinder barrel, piston side connection setting piston rod；It is characterized in that：The detection device include bracket, buoyancy body, buoyancy body from
Centring means, connecting shaft, sensor；
Setting connecting shaft is connected in the piston other side；The connecting shaft and the piston coaxial heart are arranged, the connecting shaft other end with
Bracket is connected and fixed；
Buoyancy body activity is located in the bracket, and described buoyancy body one end end face is equipped with cross recess, and floating body axis passes through cross
Slot geometric center, sensor is equipped in four slots of circumference uniform distribution respectively, and four sensors are symmetrical centered on buoyancy body axle center
Setting；
The buoyancy body is round to position inner hole of cylinder by the axis location of the buoyancy body by buoyancy body Self-centering device
At the heart；Cross recess geometric center in the i.e. described buoyancy body is overlapped with the inner hole of cylinder center of circle；
The connecting shaft connects one locating shaft of setting close to floating side, and locating shaft and the piston coaxial heart are arranged, and locating shaft is free
The cross recess geometric center position of end insertion buoyancy body, sets according to the response demand of sensor and four sensor contacts or induction
It sets, and opposite can generate displacement between buoyancy body and locating shaft；
The registration in buoyancy body axle center and locating shaft axle center, i.e. buoyancy body present position inner hole of cylinder are obtained by four sensors
The axis registration in the center of circle and the piston.
2. piston pair axiality detection device according to claim 1, it is characterised in that：The buoyancy body Self-centering device
Three slideways including three supporting legs and bracket circumference uniform distribution；The section of the bracket installation floating body portion is circular ring shape knot
Structure, buoyancy body are movably arranged in bracket, using carriage center axis as the center of circle, three slideways of the bracket circumference uniform distribution, and slideway edge
Holder radius direction arrangement, travels to and fro between the sliding rail between buoyancy body outer peripheral surface and inner wall of cylinder as three supporting legs, passes through
The movement of three supporting legs is by the axis location of the buoyancy body to position inner hole of cylinder the center point.
3. piston pair axiality detection device according to claim 2, it is characterised in that：Spring is equipped in the slideway
With banking pin, the supporting leg is slided to along slideway by the buoyancy body by spring force, the banking pin is described for limiting
Supporting leg along slideway sliding scale.
4. piston pair axiality detection device according to claim 1, it is characterised in that：The bracket, which is additionally provided with, to be used for
With the bracket mounting base of the connection axis connection, the connecting pin of connecting shaft is provided with round boss structure, the setting of bracket mounting base
There is the round notch matched with round boss structure；Bracket and connecting shaft pass through round notch, round boss knot
Structure is coupled fixation, and realizes coaxial positioning.
5. piston pair axiality detection device according to claim 1, it is characterised in that：The carriage center position is also set
Be equipped with spring, buoyancy body axial direction side is connect with the spring, the spring be placed in the bracket and the buoyancy body it
Between, elastic force axially along is provided to the buoyancy body.
6. piston pair axiality detection device according to claim 2, it is characterised in that：The buoyancy body periphery is set as
Part pyramid like configuration, described supporting leg one end are set as the internal conical surface matched with buoyancy body periphery, outside supporting leg and the buoyancy body
Circular conical surface cooperation, realizes three supporting leg simultaneous retractables of circumference uniform distribution, and stroke is identical, realizes adaptive centering.
7. piston pair axiality detection device according to claim 2, it is characterised in that：Described supporting leg one end is equipped with circular arc
Face, in order to smoothly be contacted with the inner hole of cylinder wall.
8. piston pair axiality detection device according to claim 1-7, it is characterised in that：The sensor is
Pressure sensor, inductance sensor, laser displacement sensor.
9. a kind of piston pair concentricity detection system, it is characterised in that：It is same including the described in any item piston pairs of claim 1-8
Axis degree detection device, further includes controller, and the controller carries out signal conversion, coaxial for acquiring the sensor signal
Degree calculates, concentricity is analyzed, data storage.
10. piston pair concentricity detection system according to claim 9, it is characterised in that：The controller and the biography
Wireless signal transmission is realized by ZIGBEE, bluetooth between sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810971372.7A CN108917563B (en) | 2018-08-24 | 2018-08-24 | A kind of portable piston pair axiality detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810971372.7A CN108917563B (en) | 2018-08-24 | 2018-08-24 | A kind of portable piston pair axiality detection device |
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| Publication Number | Publication Date |
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| CN108917563A true CN108917563A (en) | 2018-11-30 |
| CN108917563B CN108917563B (en) | 2019-11-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810971372.7A Active CN108917563B (en) | 2018-08-24 | 2018-08-24 | A kind of portable piston pair axiality detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114714152A (en) * | 2021-12-20 | 2022-07-08 | 河南平高电气股份有限公司 | Barrel inner wall cutting device and alignment method thereof |
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| CN108917563B (en) | 2019-11-01 |
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