CN108592756A - It measures and cubing and method of the arc structure central plane apart from size - Google Patents
It measures and cubing and method of the arc structure central plane apart from size Download PDFInfo
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- CN108592756A CN108592756A CN201810425078.6A CN201810425078A CN108592756A CN 108592756 A CN108592756 A CN 108592756A CN 201810425078 A CN201810425078 A CN 201810425078A CN 108592756 A CN108592756 A CN 108592756A
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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
- G01B5/14—Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures
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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
- G01B5/003—Measuring of motor parts
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The present invention relates to a kind of measurements and cubing and method of the arc structure central plane apart from size, including detection platform, square chest, locating shaft, vernier height gauge, supplying cell, the detection components for including the first detector and the second detector and the first indicator light and the second indicator light that correspond respectively to the first detector and the second detector in upper and lower parallel laying are installed on the vernier height gauge；The anode of supplying cell is connected by positive wire with vernier height gauge, and cathode is connected by conducting wire with the first indicator light and the second indicator light, and the first beacon lamp and the second indicator light are connected by conducting wire with the first detector and the second detector respectively.The simple and direct science of cubing global design, it is easy to operate, arc structure central plane position efficiently and accurately is measured, precision height is measured size, can be widely applied to various measurements and detection demand of the arc structure central plane apart from size.
Description
Technical field
The present invention relates to cubing fields, are a kind of measure and inspection of the arc structure central plane apart from size specifically
Tool, while the invention further relates to the measurement methods of the cubing.
Background technology
Inlet and outlet door rocking arm processing component is the critical component in diesel engine, and the working surface of rocking arm end is generally made
At arc surface, the highest position of arc surface is contacted with valve stem tail end, can shadow if the highest spot size of arc surface is inaccurate
Rocker Ratio is rung, valve end face contact position is caused to deviate, valve main shaft direction moves unbalance stress, causes valve stem and conduit
Eccentric wear influences engine emission.
By taking certain inlet valve rocker processes component as an example, it is desirable that the arc structure center where the highest position of arc surface is flat
The vertical range size L of face and rocker shaft hole is 34.5 ± 0.1mm, and product is as shown in Figure 1.This is with rocker arm shaft apart from size L
The distance between central plane of the axis hole center line and arc structure is measured on the basis of hole to be detected.Existing detection side
Method is：Rocking arm is fixed on by locating shaft on square chest, square chest is rotated 90 after putting down rocking arm water detection using vernier height gauge
Whether degree is 34.5 ± 0.1 scribing line according to drawing requirement size, is estimated in circular arc using height gauge measurement and positioning axis height
Then heart position judges the whether qualified apart from size of required measurement.This measurement method is judged using ocular estimate in circular arc
The heart cannot measure accurately apart from size value, and measured value error is big, it cannot be guaranteed that accuracy of gauge.
Based on above-mentioned background, a kind of effective and accurate measurement and cubing of the arc structure central plane apart from size are provided,
It has very important significance.
Invention content
The present invention is intended to provide a kind of cubing that can accurately measure with arc structure central plane apart from size, carries simultaneously
For the measurement method of the cubing；The detection tool structure is ingenious in design, and the position of its measurement arc structure central plane is accurate, behaviour
Make convenient reliable, can efficiently and accurately measure the size at a distance from arc structure central plane using the cubing, measure number
It is high to be worth accuracy.
The present invention is used to measure and cubing and method of the arc structure central plane apart from size, and design principle is to be based on
Theorem of diameter perpendicular to a chord is popular to be expressed as：Divide string equally perpendicular to the diameter of string and divide equally this string to two arcs.Mathematical expression is joined
Fig. 2 is examined, according to theorem of diameter perpendicular to a chord, DC is diameter, and AB is string, AE=BE, and AB, CD meet at E, then AB ⊥ DC are in E.
Based on the above theory, the present invention devises a measurement with arc structure central plane apart from size checking device.
It measures and cubing of the arc structure central plane apart from size, including detection platform 8, square chest 7, locating shaft 6, height
Tested part 5 is fixed on square chest 7 by vernier caliper, the locating shaft 6 for fixed tested Rocker arm 5 by the locating shaft 6
On；The vernier height gauge includes main scale 1, auxiliary scale 12 and micromatic setting 15；It is characterized in that, further includes supplying cell
2 and the detection components that are installed in the auxiliary scale 12 of the vernier height gauge；
The detection components include and corresponding respectively to the in the first detector 3 and the second detector 4 of upper and lower parallel laying
The first indicator light 9 and the second indicator light 10 of one detector 3 and the second detector 4；
The anode of the supplying cell 2 is connected by positive wire 13 with the vernier height gauge, and the supplying cell 2 is born
Pole is connected by conducting wire with first indicator light, 9 and second indicator light 10, and first beacon lamp, 9 and second indicator light 10 divides
It is not connected with first detector, 3 and second detector 4 by conducting wire；By above-mentioned connection, in supplying cell, height vernier
Slide calliper rule, detection platform, square chest, locating shaft, tested rocking arm, two detectors, two formation instructions between indicator light, supplying cell
Circuit, for providing detection operation instruction.
It is equipped on the vernier height gauge on the inside of insulated leg a f, the insulated leg f and vernier height gauge
Auxiliary scale 12 connects fixation, first detector, 3 and second detector 4, and corresponds respectively to the inspection of the first detector 3 and second
The first indicator light 9 and the second indicator light 10 of gauge head 4 are mounted on the insulated leg f；It is provided in the middle part of the insulated leg f
Notch, the notch of the insulated leg f to the installing frame that the first detector 3 and the second detector 4 are formed between its outside；It is described
First detector 3 is identical with the structure of the second detector 4, includes the bolt d through the installing frame, is respectively arranged in described
Inside and outside installing frame and the inner screw nut e and outboard nut c that are rotatably connected on the bolt d, and with the outer ends the bolt d
The outer ends connecting shaft b, the connecting shaft b of threaded connection carry steel ball a；
The supplying cell 2 is mounted on 12 side of auxiliary scale of the vernier height gauge by battery bracket 14；
The inner screw nut of conducting wire one end and first detector 3 between first detector 3 and first indicator light 9
E is connected, and the other end is connected on first indicator light 9；Leading between second detector 4 and second indicator light 10
Line one end is connected with the inner screw nut e of second detector 4, and the other end is connected on second indicator light 10；
First detector 3 is identical with the size of the steel ball a of the second detector 4, and two steel ball a's to detection platform 8 is vertical
Distance is adjusted by the auxiliary scale 12 of vernier height gauge, and the line of centres of two steel ball a and the verticality of detection platform pass through spiral shell
Bolt d and inner screw nut e, outboard nut c adjustment.
Measurement and method of the arc structure central plane apart from size, are characterized in that, steps are as follows：
S1:Tested Rocker arm 5 is fixed on locating shaft 6, by locating shaft 6 tightly on square chest 7；
S2：Tested Rocker arm 5 water detection is put down using common height vernier caliper, square chest 7 is rotated by 90 °, at this time in arc structure
Heart plane is parallel with detection platform 8；
S3：The first detector 3 and the second detector 4 on vernier height gauge are adjusted, first detector 3 and second is made to examine
The line of centres of two steel ball a on gauge head 4 is perpendicular to detection platform 8；
S4：Mobile vernier height gauge simultaneously adjusts position of the auxiliary scale 12 on main scale 1, makes the first detector 3 and the second detector 4
Two steel ball a close to and contact locating shaft 6 simultaneously, when the first indicator light 9 and the second indicator light 10 are lighted simultaneously, read high
The height dimension for spending vernier caliper is the first height dimension numerical value A；
S5：Mobile vernier height gauge simultaneously adjusts position of the auxiliary scale 12 on main scale 1, makes the first detector 3 and the second detector 4
Two steel ball a it is close and contact be tested Rocker arm 5 head arc surface, suitable height is adjusted by micromatic setting 15, when first
When indicator light 9 and the second indicator light 10 are lighted simultaneously, the height dimension for reading vernier height gauge is the second height dimension numerical value
B；
S6：Second height dimension numerical value and the first height dimension numerical value are subtracted each other, i.e. B-A to get tested rocking arm rocker shaft hole
With size at a distance from arc structure central plane, that is, actual size to be measured.
The position of two steel ball a of first detector, 3 and second detector 4 is grown by adjusting the stretching of bolt d
Degree, after so that the front end sphere-contact of two steel ball a is turned ruler to right angle, then the method that fastens outboard nut c, two steel balls of guarantee
The line of centres turns the line of the contact point of ruler perpendicular to inspection perpendicular to detection platform 8, that is, the front end of two steel balls and right angle
Survey platform 8.
The present invention be for measure with cubing of the arc structure central plane apart from size, structure design is by height
Detection components are installed on degree vernier caliper, to accurately measure arc structure central plane position, to realize accurate survey
Amount size at a distance from arc structure central plane, the simple and direct science of cubing global design is not only easy to operate, but also measures circular arc
Structure centre plane position efficiently and accurately measures size precision height, can be widely applied in various measurements and arc structure
The detection demand of heart plan range size.
Description of the drawings
Fig. 1：Rocker structure schematic diagram.
Fig. 2：Theorem of diameter perpendicular to a chord schematic diagram.
Fig. 3：The structural schematic diagram of cubing of the present invention.
Fig. 4：The structural schematic diagram of the present invention its detection components on vernier height gauge.
Fig. 5：The rearview of Fig. 4.
Fig. 6：Circuit theory schematic diagram.
Fig. 7：Detector sectional view.
In the figure 1, main scale, 2, supplying cell, the 3, first detector, the 4, second detector, 5, tested rocking arm, 6, positioning
Axis, 7, square chest, 8, detection platform, the 9, first indicator light, the 10, second indicator light, 11, fixture, 12, auxiliary scale, 13, positive wire,
14, battery bracket, 15, micromatic setting, a, steel ball, b, connecting shaft, c, outboard nut, d, bolt, e, inner screw nut, f, insulation branch
Seat.
Specific implementation mode
Below in conjunction with attached drawing, the principle and composition of the application are described in further detail, it should be understood that embodiment
Only the application structure is explained further, it must not be as the limitation to the application protection domain.
Embodiment 1
Measure with cubing of the arc structure central plane apart from size, including be positioned in detection platform 8 square chest 7, be fixed on
Locating shaft 6 on the square chest 7 and the tested Rocker arm 5 being installed on the locating shaft 6；It further include a height vernier calliper
Ruler, supplying cell 2, and the detection components that are installed in the vernier height gauge auxiliary scale 12；The detection components are including being in
The first detector 3 and the second detector 4 of upper and lower parallel laying, and correspond respectively to the first detector 3 and the second detector 4
The first indicator light 9 and the second indicator light 10；The anode of the supplying cell 2 passes through positive wire 13 and the height vernier calliper
Ruler is connected, and the cathode of the supplying cell 2 is connected by conducting wire with first indicator light, 9 and second indicator light 10, and described the
One beacon lamp 9 and the second indicator light 10 are connected by conducting wire with first detector, 3 and second detector 4 respectively；By upper
State connection, supplying cell, vernier height gauge, detection platform, square chest, locating shaft, tested rocking arm, two detectors, two
Instruction circuit is formed between indicator light, supplying cell, for providing detection operation instruction.It is equipped on the vernier height gauge
On the inside of one insulated leg f, the insulated leg f fixation, 3 He of the first detector are connect with the auxiliary scale 12 of vernier height gauge
Second detector 4 and the first indicator light 9 and the second indicator light 10 for corresponding respectively to the first detector 3 and the second detector 4
It is mounted on the insulated leg f；It is provided with notch in the middle part of the insulated leg f, the notch of the insulated leg f to its outside
Between form the installing frame of the first detector 3 and the second detector 4；The structure phase of first detector, 3 and second detector 4
Together, include bolt d through the installing frame, be respectively arranged in inside and outside the installing frame and be rotatably connected in the bolt
Outside inner screw nut e on d and outboard nut c, and the connecting shaft b, the connecting shaft b that are threadedly coupled with the outer ends the bolt d
End carries steel ball a；The supplying cell 2 is mounted on 12 side of auxiliary scale of the vernier height gauge by battery bracket 14；Institute
The conducting wire one end stated between the first detector 3 and first indicator light 9 is connected with the inner screw nut e of first detector 3,
The other end is connected on first indicator light 9；Conducting wire one end between second detector 4 and second indicator light 10
It is connected with the inner screw nut e of second detector 4, the other end is connected on second indicator light 10；First detection
First 3 is identical with the size of the steel ball a of the second detector 4, and the vertical range of two steel ball a to detection platform 8 passes through height vernier
The auxiliary scales 12 of slide calliper rule adjusts, and the line of centres of two steel ball a and the verticality of detection platform pass through bolt d and inner screw nut e, outer
Side nut c is adjusted.
The cubing of the present embodiment, specific manufacturing process include：
Material requested and part：a：9 steel balls of φ 2；b：Connecting shaft；c：Outside M5 nuts；d：M5 bolts；e：Inside M5 nuts；
f：Insulated leg, material are bakelite plate 60mm × 40mm；5 sections of the conducting wire of suitable length.
（One）, select 29 steel ball a of φ, then make 2 connecting shaft b, one end of the connecting shaft is processed into SR4 circular arcs, with 9 steel balls of φ
For a using sealing glue connection, the connecting shaft other end is processed into M5 wire holes, and connection M5 bolts add M5 nuts tight.
（Two）, utilize bakelite plate（Insulating materials）, be fabricated to insulated leg f, inside hollows out to form notch, notch to its
The installing frame of the first detector 3 and the second detector 4 is formed between outside；It is in parallelly to bore two up and down i.e. on the installing frame
The above-mentioned connection axle bolt connected is screwed in screw hole by M5 screw holes, tight using M5 nut handles in inside, then by insulated leg f
It is fixedly connected in vernier height gauge auxiliary scale.
（Three）, circuit connection：According to circuit diagram as shown in fig. 6, taking two section leads, respectively by one end of every section lead
It is connect with an inner screw nut e of insulated leg f, the other end connects corresponding light bulb, and two section leads is then taken to be separately connected two
A light bulb is to supplying cell negative pole end；A section lead one end is taken to be connect with height gauge auxiliary scale again, the other end and supplying cell anode
End connection.
（Four）, two steel balls status requirement：By two steel balls by adjusting M5 bolt d, make its sphere-contact to right angle
After turning ruler, then the method that fastens outboard nut c, ensure that the line for the contact point that two steel balls and right angle turn ruler is flat perpendicular to detection
Platform.
To realize the accurate measurement to being tested rocking arm arc structure central plane, circuit instruction is used in the present embodiment
Circuit, circuit diagram as shown in fig. 6, the positive electrode current of supplying cell is transmitted to detection platform by vernier height gauge, according to
It is secondary by square chest, locating shaft, tested rocking arm, two detectors, two indicator lights, then the cathode that passes through supplying cell.Such as first
Detector 3 is contacted with tested rocking arm arc surface, and instruction circuit is connected, then the first indicator light 9 is lighted；Such as the second detector 4 and quilt
The contact of rocking arm arc surface is surveyed, then the second indicator light 10 is lighted.When two indicator lights are lighted simultaneously, illustrate the first detector and the
Two detectors touch 2 points of A, B at tested rocking arm arc surface.
Embodiment 2
It measures with method of the arc structure central plane apart from size, the measurement inspection based on arc structure central plane apart from size
Tool realizes following operating procedure：
S1：In detection platform 8, first tested Rocker arm 5 centre bore is placed on locating shaft 6, passes through square chest 7 and the fixture of upper part
11 by locating shaft 6 tightening position；
S2：Tested Rocker arm 5 water detection is put down using common height vernier caliper, is later rotated by 90 ° square chest 7, at this time arc structure
Central plane it is parallel with detection platform 8；
S3：The first detector 3 and the second detector 4 on vernier height gauge are adjusted, first detector 3 and second is made to examine
The line of centres of two steel ball a on gauge head 4 is perpendicular to detection platform 8；The two of first detector, 3 and second detector 4
The position of a steel ball a be by adjusting the extension elongation of bolt d, after so that the front end sphere-contact of two steel ball a is turned ruler to right angle,
The method for fastening outboard nut c again, ensures the line of centres of two steel balls perpendicular to detection platform 8, in other words two steel balls
Front end and right angle turn the line of the contact point of ruler perpendicular to detection platform 8；
S4：Mobile vernier height gauge simultaneously adjusts position of the auxiliary scale 12 on main scale 1 by micromatic setting 15, makes first inspection
Two steel ball a of gauge head 3 and the second detector 4 close to simultaneously locating shaft 6 is contacted simultaneously, when the first indicator light 9 and the second indicator light
10 when lighting simultaneously, and the height dimension for reading vernier height gauge is the first height dimension numerical value A；
S5：Mobile vernier height gauge simultaneously adjusts position of the auxiliary scale 12 on main scale 1 by micromatic setting 15, makes the first detector
3 and second detector 4 two steel ball a it is close and contact and be tested Rocker arm 5 head arc surface, it is suitable to be adjusted by micromatic setting
Highly, when the first indicator light 9 and the second indicator light 10 are lighted simultaneously, the height dimension for reading vernier height gauge is second high
Spend dimensional values B；
S6：Second height dimension numerical value and the first height dimension numerical value are subtracted each other, i.e. B-A to get tested rocking arm rocker shaft hole
With size at a distance from arc structure central plane, that is, actual size to be detected.
The measurement of above-described embodiment and cubing and its measurement method of the arc structure central plane apart from size, can be accurate
Arc structure central plane position is measured, to realize accurate measurement size at a distance from arc structure central plane；
The simple and direct science of cubing global design, it is swift and convenient to operate, and measure arc structure central plane using the principle of theorem of diameter perpendicular to a chord
Position efficiently and accurately measures size precision height.Detection process is not required to artificial experience judgement, substantially increases the accurate of data
Property, while also improving detection efficiency.
Claims (7)
1. measuring and cubing of the arc structure central plane apart from size, including detection platform（8）, square chest（7）, locating shaft（6）、
Vernier height gauge, the locating shaft（6）For fixed tested rocking arm（5）, and pass through the locating shaft（6）By tested rocking arm
（5）It is fixed on square chest（7）On；The vernier height gauge includes main scale（1）, auxiliary scale（12）And micromatic setting（15）；Its feature
It is, further includes supplying cell（2）With the auxiliary scale for being installed on the vernier height gauge（12）On detection components；
The detection components include the first detector in upper and lower parallel laying（3）With the second detector（4）, and correspond to respectively
In the first detector（3）With the second detector（4）The first indicator light（9）With the second indicator light（10）；
The supplying cell（2）Anode pass through positive wire（13）It is connected with the vernier height gauge, the supplying cell
（2）Cathode pass through conducting wire and first indicator light（9）With the second indicator light（10）It is connected, first beacon lamp（9）With
Second indicator light（10）Pass through conducting wire and first detector respectively（3）With the second detector（4）It is connected.
2. measurement as described in claim 1 and cubing of the arc structure central plane apart from size, are characterized in that,
One insulated leg is installed on the vernier height gauge（f）, the insulated leg（f）Inside and vernier height gauge
Auxiliary scale（12）Connecing fixation, first detector（3）With the second detector（4）, and correspond respectively to the first detector（3）
With the second detector（4）The first indicator light（9）With the second indicator light（10）It is mounted on the insulated leg（f）On；It is described
Insulated leg（f）Middle part is provided with notch, the insulated leg（f）Notch to its outside between form the first detector（3）With
Second detector（4）Installing frame；First detector（3）With the second detector（4）Structure it is identical, including through institute
State the bolt of installing frame（d）, it is respectively arranged in inside and outside the installing frame and is rotatably connected in the bolt（d）On inside spiral shell
It is female（e）And outboard nut（c）, and with the bolt（d）The connecting shaft that outer end is threadedly coupled（b）, the connecting shaft（b）Outer end
With steel ball（a）.
3. measurement as claimed in claim 2 and cubing of the arc structure central plane apart from size, are characterized in that,
The supplying cell（2）Pass through battery bracket（14）Mounted on the auxiliary scale of the vernier height gauge（12）Side.
4. measurement as claimed in claim 3 and cubing of the arc structure central plane apart from size, are characterized in that,
First detector（3）With first indicator light（9）Between conducting wire one end and first detector（3）It is interior
Side nut（e）It is connected, the other end is connected to first indicator light（9）On, second detector（4）With second instruction
Lamp（10）Between conducting wire one end and second detector（4）Inner screw nut（e）It is connected, the other end is connected to described second
Indicator light（10）On.
5. measurement as claimed in claim 4 and cubing of the arc structure central plane apart from size, are characterized in that,
First detector（3）With the second detector（4）Steel ball（a）Size it is identical, two steel balls（a）To detection platform
（8）The vertical range auxiliary scale that passes through vernier height gauge（12）Adjustment, two steel balls（a）The line of centres and detection platform
（8）Verticality pass through bolt（d）With inner screw nut e, outboard nut c adjustment.
6. measuring and method of the arc structure central plane apart from size, which is characterized in that steps are as follows：
S1:By tested rocking arm（5）It is fixed on locating shaft（6）On, by locating shaft（6）Tightly in square chest（7）On；
S2：By tested rocking arm（5）Water detection is flat, by square chest（7）It is rotated by 90 °, at this time the central plane and detection platform of arc structure
（8）It is parallel；
S3：Adjust the first detector on vernier height gauge（3）With the second detector（4）, make first detector（3）With
Second detector（4）On two steel balls（a）The line of centres perpendicular to detection platform（8）；
S4：Mobile vernier height gauge simultaneously adjusts auxiliary scale（12）In main scale（1）On position, make the first detector（3）With second
Detector（4）Two steel balls（a）It is close simultaneously to contact locating shaft simultaneously（6）, when the first indicator light（9）With the second indicator light（10）
When lighting simultaneously, the height dimension for reading vernier height gauge is the first height dimension numerical value（A）；
S5：Mobile vernier height gauge simultaneously adjusts auxiliary scale（12）In main scale（1）On position, make the first detector（3）With second
Detector（4）Two steel balls（a）Close and contact is tested rocking arm（5）Head arc surface adjusts suitable height, when the first finger
Show lamp（9）With the second indicator light（10）When lighting simultaneously, the height dimension for reading vernier height gauge is the second height dimension number
Value（B）；
S6：Second height dimension numerical value and the first height dimension numerical value are subtracted each other, i.e.,（B）（A）To get the rocking arm of tested rocking arm
Axis hole size at a distance from arc structure central plane, that is, actual size to be measured.
7. as claimed in claim 6 measure and method of the arc structure central plane apart from size, which is characterized in that
First detector（3）With the second detector（4）Two steel balls（a）Position be by adjusting bolt（d）Stretch
Go out length, after so that its sphere-contact is turned ruler to right angle, then fastens outboard nut（c）Method, ensure two steel balls（a）Center
Line is perpendicular to detection platform（8）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810425078.6A CN108592756A (en) | 2018-05-07 | 2018-05-07 | It measures and cubing and method of the arc structure central plane apart from size |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810425078.6A CN108592756A (en) | 2018-05-07 | 2018-05-07 | It measures and cubing and method of the arc structure central plane apart from size |
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| CN108592756A true CN108592756A (en) | 2018-09-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113008114A (en) * | 2021-01-25 | 2021-06-22 | 湖南省水利投地方电力有限公司 | Hydro-generator stator circle measuring frame |
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| CN203489800U (en) * | 2013-10-11 | 2014-03-19 | 金陵科技学院 | Circle center distance measuring scale for plotting |
| CN206146359U (en) * | 2016-11-10 | 2017-05-03 | 江苏三能动力总成有限公司 | A examine utensil that is used for on final assembly line detecting engine crankshaft and camshaft centre -to -centre spacing |
| CN208520308U (en) * | 2018-05-07 | 2019-02-19 | 山东华源莱动内燃机有限公司 | Measurement and cubing of the arc structure central plane apart from size |
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| CN113008114B (en) * | 2021-01-25 | 2022-06-21 | 湖南省水利投地方电力有限公司 | Hydro-generator stator circle measuring frame |
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