CN108917552A - Workpiece surface profile on-position measure system and method - Google Patents
Workpiece surface profile on-position measure system and method Download PDFInfo
- Publication number
- CN108917552A CN108917552A CN201810765399.0A CN201810765399A CN108917552A CN 108917552 A CN108917552 A CN 108917552A CN 201810765399 A CN201810765399 A CN 201810765399A CN 108917552 A CN108917552 A CN 108917552A
- Authority
- CN
- China
- Prior art keywords
- workpiece
- measured
- surface profile
- measured workpiece
- profile
- 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.)
- Granted
Links
Classifications
-
- 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
- G01B5/20—Measuring arrangements characterised by the use of mechanical techniques for measuring contours or curvatures
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
本发明公开了一种工件表面轮廓在位测量系统及方法，其中，系统包括：位移测量模块，包括两个位移传感器,用于测量被测量工件表面轮廓的变化量；固定支撑模块，包括两个测量臂，用于夹持位移传感器，以使位移传感器垂直工件表面沿所述被测量工件轴线方向滑动；数据采集模块，用于获取被测量工件表面轮廓的变化量；数据处理模块，用于根据被测量工件表面轮廓的变化量得到被测量工件的当前轮廓，并实时存储被测量工件的当前轮廓。该系统测量过程简单快捷，测量精度高且价格低廉，安装方便且开放性好。
The invention discloses an in-situ measurement system and method for the surface contour of a workpiece, wherein the system includes: a displacement measurement module including two displacement sensors for measuring the variation of the surface contour of the workpiece to be measured; a fixed support module including two The measuring arm is used to clamp the displacement sensor so that the displacement sensor slides along the axis of the measured workpiece perpendicular to the surface of the workpiece; the data acquisition module is used to obtain the variation of the surface profile of the measured workpiece; the data processing module is used to The variation of the surface profile of the measured workpiece is used to obtain the current profile of the measured workpiece, and the current profile of the measured workpiece is stored in real time. The measurement process of the system is simple and quick, the measurement accuracy is high, the price is low, the installation is convenient and the openness is good.
Description
Technical field
The present invention relates to mechanical measurement technique field, in particular to a kind of workpiece surface profile on-position measure system and side
Method.
Background technique
It is essential for measuring surface profile precision for there is the shaft-like workpiece of surface profile required precision, after machining
's.Currently to workpiece surface profile measurement, there are mainly two types of method, on-position measure and off-line measurements.On-position measure, which refers to, utilizes machine
The included measuring system of bed, workpiece surface profile measurement is carried out when workpiece is without departing from lathe.This measurement method measuring speed
Fastly, dismounting workpiece is not had to when measurement, but measurement accuracy is limited, initial data is not easy to extract, and systemic openness is poor, cannot be with other
Machining state signal (process vibration, power signal etc.) synchro measure.And the workpiece surface profile measurement that lathe is included
System price is expensive, therefore machine tool does not have workpiece surface profile measuring system.Workpiece is mounted on specially by off-line measurement
Synthesis measuring profilometer on carry out surface profile measurement.This measurement method precision is high, but time of measuring is long, and instrument sheet
Body is expensive.For large-sized workpiece, can not generally be measured using surface profiler.Therefore it is low to develop a kind of price
Honest and clean, easy for installation, open good workpiece surface profile on-position measure system, is of great significance for field of machining.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, having and measuring an object of the present invention is to provide a kind of workpiece surface profile on-position measure system
Journey is simple and fast, measurement accuracy height and cheap, easy for installation and open good advantage.
It is another object of the present invention to propose a kind of workpiece surface profile on-position measure method.
In order to achieve the above objectives, one aspect of the present invention embodiment proposes a kind of workpiece surface profile on-position measure system,
Including：Displacement measurement module, institute's displacement measurement module include two displacement sensors, for measuring measured workpiece surface wheel
Wide variable quantity；Fixed supporting module, the fixed supporting module include two measurement arms, are passed for clamping two displacements
Sensor, so that two institute displacement sensors vertical workpiece surfaces are slided along the measured workpiece axis direction；Data acquisition
Module, for obtaining the variable quantity of the measured workpiece surface profile；Data processing module, for according to the measured work
The variable quantity of part surface profile obtains the current outline of the measured workpiece, and measured workpiece described in real-time storage is current
Profile.
The workpiece surface profile on-position measure system of the embodiment of the present invention clamps two displacement sensings by two measurement arms
Device is simultaneously slided perpendicular to workpiece surface along the measured workpiece axis direction, and is taken turns by collected measured workpiece surface
Wide variable quantity obtains the current outline of measured workpiece, and real-time storage, has measurement process simple and fast, and measurement accuracy is high
And cheap, easy for installation and open good advantage.
In addition, workpiece surface profile on-position measure system according to the above embodiment of the present invention can also have following add
Technical characteristic：
Further, in one embodiment of the invention, the measurement part of described two displacement sensors is according to
The variation of measured workpiece surface profile and stretch, to obtain the variable quantity of the measured workpiece surface profile.
Further, in one embodiment of the invention, described two measurement arms include：Pedestal is used for magnetic absorption
In lathe, and stretches and fix in any direction.
Further, in one embodiment of the invention, the workpiece surface profile on-position measure system, is also wrapped
It includes：Power supply module, for powering.
Further, in one embodiment of the invention, it to be tested with described when described two displacement sensors are installed
Workpiece surface perpendicular contact is measured, with the variation of the measured workpiece surface profile, the measurement of described two displacement sensors
Part can stretch, to guarantee that measurement part can be with the measured workpiece intimate surface contact.
Further, in one embodiment of the invention, the data processing module is also used to calculate described be measured
The cylindricity of the circularity of workpiece interface and the measured workpiece, and display and save the section circularity and it is described be measured
The cylindricity of workpiece.
Further, in one embodiment of the invention, the data processing module is calculating the measured workpiece
When the circularity in section, the position of institute's displacement sensors is fixed on the position in a certain section of the measured workpiece, and workpiece revolves
It circles.
Further, in one embodiment of the invention, the data processing module is calculating the measured workpiece
When the cylindricity of surface profile and the measured workpiece, institute's displacement sensors are along the measured workpiece axis direction from institute
It states measured workpiece one end and is moved to the other end, while the measured workpiece rotates.
Further, in one embodiment of the invention, described two displacement sensors are mounted on hangs down with axis of workpiece
In straight same plane, and the angle between two displacement sensors is 90 degree.
Further, in one embodiment of the invention, the distance between the measurement part of described two displacement sensors
By survey workpiece circumference a quarter.
In order to achieve the above objectives, another aspect of the present invention embodiment proposes a kind of workpiece surface profile on-position measure side
Method.
The workpiece surface profile on-position measure method of the embodiment of the present invention, including：Two displacement sensor vertical workpiece tables
Face is slided along the measured workpiece axis direction, while rotating measured workpiece, to measure the measured workpiece surface wheel
Wide variable quantity；The current outline of the measured workpiece is obtained according to the variable quantity of the measured workpiece surface profile, and
The current outline of measured workpiece described in real-time storage.
The workpiece surface profile on-position measure method of the embodiment of the present invention clamps two displacement sensings by two measurement arms
Device is simultaneously slided perpendicular to workpiece surface along the measured workpiece axis direction, and by collected measured workpiece surface profile
Variable quantity obtain the current outline and real-time storage of measured workpiece, have measurement process simple and fast, measurement accuracy it is high and
It is cheap, easy for installation and open good advantage.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention will become from the following description of the accompanying drawings of embodiments
Obviously and it is readily appreciated that, wherein：
Fig. 1 is the structural schematic diagram according to the workpiece surface profile on-position measure system of one embodiment of the invention；
Fig. 2 is the flow chart according to the workpiece surface profile on-position measure method of the embodiment of the present invention.
Description of symbols：
Lathe 1；Axis 2；Power supply module 3；Fixed supporting module 4；Measure arm 41；Measure arm 42；Displacement measurement module 5；Position
Displacement sensor 51；Displacement sensor 52；Data acquisition module 6；Data processing module 7；Head frame 11；Lathe bed 12；Supporting plate 13；Guide rail
14；Tailstock 15.
Specific embodiment
The embodiment of the present invention is described below in detail, the example of embodiment is shown in the accompanying drawings, wherein identical from beginning to end
Or similar label indicates same or similar element or element with the same or similar functions.It is retouched below with reference to attached drawing
The embodiment stated is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
The workpiece surface profile on-position measure system and method proposed according to embodiments of the present invention is described with reference to the accompanying drawings,
The workpiece surface profile on-position measure system proposed according to embodiments of the present invention is described with reference to the accompanying drawings first.
Fig. 1 is the structural schematic diagram according to the workpiece surface profile on-position measure system of the embodiment of the present invention.
As shown in Figure 1, the workpiece surface profile on-position measure system includes：Fixed supporting module 4, displacement measurement module 5,
Power supply module 3, data acquisition module 6 and data processing module 7.
In one embodiment of the invention, in conjunction with Fig. 1, head frame 11, guide rail 14, tailstock 15 are mounted on lathe 1.Supporting plate
13 are mounted on guide rail 14, and can move back and forth on guide rail 14.Axis 2 is mounted on lathe by head frame 11 and tailstock 15,
And it can be rotated under the action of head frame 11.
Wherein, displacement measurement module 5 includes displacement sensor 51, displacement sensor 52；Power supply module 3 and displacement sensor
51, displacement sensor 52 is connected, and is displacement sensing 51, the power supply of displacement sensor 52.
Further, fixed supporting module 4 includes measurement arm 41, measurement arm 42.Wherein, measurement arm 41 is for clamping displacement
Sensor 51, measurement arm 41 has magnetic absorption pedestal, can be adsorbed on supporting plate 13, and moves back and forth with supporting plate 13.Measurement
Arm 41 can be stretched and be fixed in any direction.Measurement arm 42 has magnetic inhale for clamping displacement sensor 52, measurement arm 42
Attached pedestal can be adsorbed on supporting plate 13, and be moved back and forth with supporting plate 13.Measurement arm 42 can stretch in any direction and consolidate
It is fixed.
In one embodiment of the invention, displacement sensor 51, displacement sensor 52 are mounted on vertical with 2 line of axis same
In one plane, and the angle between displacement sensor 51, displacement sensor 52 is 90 degree.
Further, displacement sensor 51, displacement sensor 52 measurement part between distance by 2 circumference of survey axis four
/ mono-.
In one embodiment of the invention, displacement sensor 51, displacement sensor 52 measurement part be can elasticity
Flexible.Displacement sensor 51, displacement sensor 52 install when will with 2 surface perpendicular contact of axis, with the change of 2 surface profile of axis
Change, displacement sensor 51, the measurement portion branch of displacement sensor 52 are flexible, to guarantee that measurement part can closely connect with 2 surface of axis
Touching.Displacement sensor 51, displacement sensor 52 can be slided with 2 surface of vertical axis.
It should be understood that data acquisition module 6 is connected with the signal output end of displacement sensor 51, displacement sensor 52,
For acquiring the output signal of displacement sensor 51, displacement sensor 52.
Data processing module 7 is connected with the output end of data acquisition module 6, and acquisition module 6 acquires for receiving data
Signal, and 2 surface profile of axis is calculated using the signal received.Data processing module 7 can be received with real-time storage and display
Signal and 2 surface profile of axis that is calculated.
Data processing module 7 can also calculate the circularity in a certain section of axis 2 and the cylindricity of axis 2, and display and save
The circularity in a certain section of the axis 2 of calculating and the cylindricity of axis 2.
Data processing module 7 is when calculating the circularity in a certain section of axis 2, displacement sensor 51, institute's rheme when acquiring signal
The position of displacement sensor 52 is fixed on the position in a certain section of axis 2, while axis 2 rotates a circle.
Data processing module 7 when calculating the cylindricity of 2 surface profile of axis and axis 2, displacement sensor 51 when acquiring signal,
Institute's displacement sensors 52 are moved to the other end from 2 one end of axis along 2 axis direction of axis, while axis 2 rotates.
The workpiece surface profile on-position measure system of the embodiment of the present invention clamps displacement sensor and vertical by measurement arm
It is slided in workpiece surface along the measured workpiece axis direction, and by the variable quantity of collected measured workpiece surface profile
The current outline and real-time storage of measured workpiece are obtained, has measurement process simple and fast, measurement accuracy is high and cheap,
Easy for installation and open good advantage.
The workpiece surface profile on-position measure method proposed according to embodiments of the present invention is described referring next to attached drawing.
Fig. 2 is the flow chart of the workpiece surface profile on-position measure method of one embodiment of the invention.
As shown in Fig. 2, the workpiece surface profile on-position measure method includes the following steps：
In step s101, displacement sensor vertical workpiece surface is slided along the measured workpiece axis direction, simultaneously
Measured workpiece is rotated, to measure the variable quantity of the measured workpiece surface profile.
In step s 102, the current outline of measured workpiece is obtained according to the variable quantity of measured workpiece surface profile,
And the current outline of real-time storage measured workpiece.
It should be noted that the aforementioned explanation to workpiece surface profile on-position measure system embodiment is also applied for this
The workpiece surface profile on-position measure method of embodiment, details are not described herein again.
The workpiece surface profile on-position measure method of the embodiment of the present invention clamps displacement sensor and vertical by measurement arm
It is arbitrarily slided in workpiece surface, and working as measured workpiece is obtained by the variable quantity of collected measured workpiece surface profile
Front profile, and real-time storage have measurement process simple and fast, and measurement accuracy is high and cheap, easy for installation and open
Good advantage.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the system of indication or suggestion meaning or element must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810765399.0A CN108917552B (en) | 2018-07-12 | 2018-07-12 | On-site measurement system and method for workpiece surface profile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810765399.0A CN108917552B (en) | 2018-07-12 | 2018-07-12 | On-site measurement system and method for workpiece surface profile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108917552A true CN108917552A (en) | 2018-11-30 |
| CN108917552B CN108917552B (en) | 2024-10-01 |
Family
ID=64411413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810765399.0A Active CN108917552B (en) | 2018-07-12 | 2018-07-12 | On-site measurement system and method for workpiece surface profile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108917552B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110823165A (en) * | 2019-11-19 | 2020-02-21 | 文登恒润锻造有限公司 | Platform, method and device for measuring straightness of forged crankshaft blank and electronic equipment |
| KR20200142893A (en) * | 2019-06-14 | 2020-12-23 | (주)대호테크 | A measurement device and method of an forming device |
| US20220349916A1 (en) * | 2021-05-03 | 2022-11-03 | Optipro Systems, LLC | Nanoscale imaging systems and methods thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4653196A (en) * | 1984-11-15 | 1987-03-31 | Elgema Gmbh | Device for measuring the profile shape of cylindrical workpiece surfaces |
| CN1892176A (en) * | 2005-07-05 | 2007-01-10 | 北京航空航天大学 | Measuring device for inner-rim large-flange spherical radius of taper roll bearing and measuring method |
| CN101354239A (en) * | 2007-07-23 | 2009-01-28 | 鸿富锦精密工业（深圳）有限公司 | Measuring device and measuring method using the measuring device |
| CN102890475A (en) * | 2012-09-21 | 2013-01-23 | 江苏高精机电装备有限公司 | Method for measuring and compensating surface profile error of large rotary body part in real time |
| US20140331511A1 (en) * | 2012-01-04 | 2014-11-13 | Tokyo Seimitsu Co., Ltd. | Contour and surface texture measuring instrument and contour and surface texture measuring method |
| CN104613922A (en) * | 2015-02-26 | 2015-05-13 | 中国科学技术大学 | Object outline measurement system and method |
| CN108253906A (en) * | 2018-03-20 | 2018-07-06 | 齐鲁工业大学 | A kind of axle housing circularity cylindricity detection device axis of workpiece location error compensation method |
| CN208547320U (en) * | 2018-07-12 | 2019-02-26 | 清华大学 | Workpiece surface profile on-position measure system |
-
2018
- 2018-07-12 CN CN201810765399.0A patent/CN108917552B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4653196A (en) * | 1984-11-15 | 1987-03-31 | Elgema Gmbh | Device for measuring the profile shape of cylindrical workpiece surfaces |
| CN1892176A (en) * | 2005-07-05 | 2007-01-10 | 北京航空航天大学 | Measuring device for inner-rim large-flange spherical radius of taper roll bearing and measuring method |
| CN101354239A (en) * | 2007-07-23 | 2009-01-28 | 鸿富锦精密工业（深圳）有限公司 | Measuring device and measuring method using the measuring device |
| US20140331511A1 (en) * | 2012-01-04 | 2014-11-13 | Tokyo Seimitsu Co., Ltd. | Contour and surface texture measuring instrument and contour and surface texture measuring method |
| CN102890475A (en) * | 2012-09-21 | 2013-01-23 | 江苏高精机电装备有限公司 | Method for measuring and compensating surface profile error of large rotary body part in real time |
| CN104613922A (en) * | 2015-02-26 | 2015-05-13 | 中国科学技术大学 | Object outline measurement system and method |
| CN108253906A (en) * | 2018-03-20 | 2018-07-06 | 齐鲁工业大学 | A kind of axle housing circularity cylindricity detection device axis of workpiece location error compensation method |
| CN208547320U (en) * | 2018-07-12 | 2019-02-26 | 清华大学 | Workpiece surface profile on-position measure system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200142893A (en) * | 2019-06-14 | 2020-12-23 | (주)대호테크 | A measurement device and method of an forming device |
| KR102204895B1 (en) * | 2019-06-14 | 2021-01-19 | (주)대호테크 | A measurement device and method of an forming device |
| CN110823165A (en) * | 2019-11-19 | 2020-02-21 | 文登恒润锻造有限公司 | Platform, method and device for measuring straightness of forged crankshaft blank and electronic equipment |
| CN110823165B (en) * | 2019-11-19 | 2022-03-25 | 文登恒润锻造有限公司 | Platform, method and device for measuring straightness of forged crankshaft blank and electronic equipment |
| US20220349916A1 (en) * | 2021-05-03 | 2022-11-03 | Optipro Systems, LLC | Nanoscale imaging systems and methods thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108917552B (en) | 2024-10-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105556253B (en) | Reduce the method and apparatus of the error of slewing | |
| CN207963779U (en) | A kind of laser displacement sensor calibrating installation | |
| CN102937409B (en) | Polar coordinate gear measurement center and zero calibrating method thereof | |
| CN206056522U (en) | A kind of contactless cylinder part inside/outside diameter size and form and position error measurement device | |
| CN202101656U (en) | Double-measuring head structure | |
| CN105698670B (en) | A kind of method for fast measuring of the machine tool guideway mounting plane depth of parallelism | |
| CN109596080B (en) | Shock Absorber Cylinder Inner Hole Accuracy Tester | |
| CN108278979A (en) | A kind of blade situ contact formula three-dimensional measuring apparatus and method | |
| CN112665879B (en) | A target surface deviation measurement and adjustment method and device for a wheel posture measurement system | |
| CN107514968A (en) | The method of surface levelness after test piece milling | |
| CN203672347U (en) | Three-coordinate measuring instrument | |
| CN108844477B (en) | Portable pipeline external diameter measuring device | |
| CN102679927A (en) | Measuring device and use method thereof | |
| CN106052617B (en) | Engine cylinder calipers | |
| CN102121816A (en) | Horizontal roundness and cylindricity automatic-measuring device | |
| CN108917552B (en) | On-site measurement system and method for workpiece surface profile | |
| CN208547320U (en) | Workpiece surface profile on-position measure system | |
| CN205482696U (en) | A morpheme error measuring apparatu for measuring dish cover, axle class, Workpiece | |
| CN102788550A (en) | Comprehensive visualization measuring instrument of multi-sensor shape and position errors | |
| CN206192313U (en) | Three -coordinates measuring's anchor clamps | |
| CN111089546A (en) | Non-contact cylindricity measuring instrument and measuring method | |
| CN204666093U (en) | A kind of non-contact measurement mechanical arm | |
| CN202648637U (en) | Measuring device | |
| CN211346656U (en) | Tool for measuring cylindricity of outer surface of round pipe or round rod | |
| CN208313228U (en) | A kind of portable pipe external diameter measuring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |