CN106949872A - A kind of size detecting method of use limit range envelope component shaping profile - Google Patents
A kind of size detecting method of use limit range envelope component shaping profile Download PDFInfo
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- CN106949872A CN106949872A CN201710153441.9A CN201710153441A CN106949872A CN 106949872 A CN106949872 A CN 106949872A CN 201710153441 A CN201710153441 A CN 201710153441A CN 106949872 A CN106949872 A CN 106949872A
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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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/20—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring contours or curvatures, e.g. determining profile
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- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The invention discloses a kind of size detecting method of use limit range envelope component shaping profile, workpiece positioning and clamping to be checked is carried out profile scan detection by the detection method, obtains contour curve；Demarcation measurement is carried out to the contour curve that scanning is obtained, it is determined that the measurement size of final workpiece to be checked；Determinating area is obtained using envelope method, and the global shape of component shaping profile to be checked detected using formed features Ditermination of cam profile；The qualified formed features Ditermination of cam profile of shape is placed into determinating area, if formed features Ditermination of cam profile can be included in determinating area completely, component shaping feature eligibility is examined, conversely, unqualified.It can be reduced with some random errors during short circular arc Complex Parts Product checking by the detection method of the present invention, it is ensured that the detection quality of product, be effectively improved detection efficiency.
Description
Technical field
The present invention relates to field of measuring technique, more particularly to a kind of size of use limit range envelope component shaping profile
Detection method.
Background technology
In recent years, with the fast development of nuclear power technology, the demand of the component such as nuclear fuel assembly screen work also constantly rises,
Dimension precision requirement yet with these components is high, and cause that high-accuracy stepping punching mould punching production comes out is corresponding
Precision components size detection turn into difficult point.
Comprising the short circular arc of multistage, (the corresponding central angle of the short circular arc in part is less than particularly in the shaped profile of complex assemblies
30 °), measuring method conventional at present, the extension tangent line 1 of the convex circular arc both sides as shown in by Fig. 1 and to sunken arcs
The extension tangent line 2 of both sides, the convex circular arc to be measured 3 of measurement acquisition and the radius to recessed circular arc to be measured 4.
It should be noted that when choosing short circular arc calculating arc radius using contourgraph computer software, first having to definition and sitting
The longer straight line portion in two ends defines reference axis on parameter, the contour curve that selection scanning is obtained, and ajusts scanning profile curve.So
The tangent line of short circular arc both sides on contourgraph computer software selection scanning profile curve is recycled afterwards, and tangent line extension is intersected at one
Point, this two straight line formation, one section of region, when selecting short circular arc portion, in the region that this two straight lines and circular arc are constituted, to the greatest extent
Measure possible big selection arc profile to calculate arc radius, selection largest contours can be repeated several times, obtain average value
Reduce random error.
The radius of short circular arc can be obtained by such method measurement on band formed features, but for overall wheel
For wide size, because short circular arc is more on formed features, and in the technical requirements that strip product drawing is provided, overall dimensions
As tolerance is with the tolerance range of arc radius, even if so that the error for causing short arc radius qualified but tiny causes circle
There is deviation heart position, and the accumulated error of the short circular arc home position of multistage causes overall dimensions measurement error bigger than normal.
The relative dimensions such as m1 as shown in Figure 2, m2, m3, m4, m5, m6 are relevant with short circular arc home position, and these chis
The very little grade of tolerance is again in same scope, and the measurement error of short circular arc can add up to be delivered in the dimension chain, therefore is difficult to protect
Demonstrate,prove the accuracy of relative dimensions in the dimension chain measured.Therefore be punched out for high-accuracy progressive die blanking die come ap1000
The detection of nuclear fuel assembly screen work band shaped profile needs rational detection method to judge the qualification of product size.
The content of the invention
Because ap1000 nuclear fuel assembly screen work bands formed features are complicated, in order to adapt to progressive die to ap1000 nuclear fuels
The qualification detection of component screen work band shaped profile, meets Production requirement, and the present invention proposes a kind of using limit interval bag
The size detecting method of network component shaping profile, the inspection of the shaped profile of especially suitable AP1000 nuclear fuel assemblies screen work band
Survey.It can ensure to improve the precision in detection process in the method either detected, or detection operating process, reduce accidental
The influence of error and systematic error.
The technology measurement scheme that the present invention is used is as follows：
A kind of size detecting method of use limit range envelope component shaping profile, it is characterised in that the detection side
Method is comprised the following steps：
Step 1: by workpiece positioning and clamping to be checked；
Workpiece clamping to be checked on special fixture, the special fixture for having clamped workpiece to be checked is then arranged on measurement work
Make on the clamping and fixing device on platform；
Step 2: carrying out profile scan detection to workpiece to be checked, contour curve is obtained；
Using survey tool, at least three levels before, during and after the detected part progress of workpiece to be checked are scanned, and each
The original position and final position of the feature contour of level need to be consistent, and ensure the scanning profile length of a curve of acquisition
Unanimously；
Step 3: demarcation measurement is carried out to the contour curve that scanning is obtained, it is determined that the measurement size of final workpiece to be checked；
Demarcation measurement is carried out to the contour curve of many levels described in step 2, its average value is taken as final to be checked
The measurement size of workpiece；
Step 4: obtaining determinating area using envelope method；
By the technical requirements and the margin of tolerance given on workpiece drawing to be checked, tested want is drawn using maximum envelope principle
The maximum limes superiors contour curve of element, minimum limit inferior contour curve and nominal contour curve, the maximum limes superiors profile are bent
Line and the minimum limit inferior contour curve are parallel to each other, and form determinating area therebetween, and the nominal contour curve is located at
The centre position of the determinating area；
Step 5: being detected to the global shape of component shaping profile to be checked；
The formed features Ditermination of cam profile of workpiece to be checked is obtained by the measurement size of workpiece to be checked in step 3, such as institute
State formed features Ditermination of cam profile consistent with the shape of the nominal contour curve, then next step detection is carried out, if shape is not
Unanimously, then examined workpiece is unqualified；
Step 6: being detected to the overall dimensions of component shaping profile to be checked, work to be checked is judged using envelope method
Whether part is qualified；
The formed features Ditermination of cam profile consistent with the nominal contour curve of shape in step 5 is placed into
In the determinating area, if the formed features Ditermination of cam profile can be included in the determinating area completely, say
The formed features of bright examined workpiece meet drawing technical requirements, examine component shaping feature eligibility, conversely, unqualified.
Further, in the step 4, in order to ensure the maximum limes superiors on the basis of technical requirements are met
The determinating area area of contour curve and the minimum limit inferior contour curve composition is maximum, the maximum limes superiors contour curve
The middle least limit offset dimensions to recessed short circular arc portion selection arc radius, the convex maximum pole of circular arc portion selection
Limit offset dimensions.
Further, in the step 4, in order to ensure the maximum limes superiors on the basis of technical requirements are met
The determinating area area of contour curve and the minimum limit inferior contour curve composition is maximum, the minimum limit inferior contour curve
The middle greatest limit offset dimensions to recessed short circular arc portion selection arc radius, the convex minimum pole of circular arc portion selection
Limit offset dimensions.
Further, the measurement workbench is the measurement workbench of contourgraph, and the contourgraph has measurement probe, institute
State measurement probe motion direction consistent parallel with the length direction of the component shaping feature to be checked.
Further, if the formed features of the workpiece to be checked are not parallel or vertical distribution is on the workpiece to be checked,
Clamping and fixing device on the contourgraph test desk is rotated respective angles, when making measurement the direction of motion of the probe with into
The length direction of shape feature is consistent.
Further, the workpiece to be checked is AP1000 nuclear fuel assembly screen work bands.
Beneficial effects of the present invention：
It can be reduced with some random errors during short circular arc Complex Parts Product checking by this method, reduce error
Accumulative influence, it is ensured that the detection quality of product, is effectively improved detection efficiency.
Brief description of the drawings
Fig. 1 is the general measure method schematic diagram of short circular arc on complicated formed features；
Fig. 2 is the general measure method schematic diagram of other linear dimensions on complicated formed features；
Fig. 3 is the envelope method detects schematic diagram of complicated formed features global shape size；
Fig. 4 is the complicated maximum limes superiors profile technique of painting schematic diagram of formed features envelope method；
Fig. 5 is the complicated minimum limit inferior profile technique of painting schematic diagram of formed features envelope method.
Wherein：The extension tangent line of the convex circular arc both sides of 1-；Extension tangent line from 2- to sunken arcs both sides；3- is convex
Circular arc to be measured；4- is to recessed circular arc to be measured；5- maximum limes superiors contour curves；6- nominal contour curves；7- minimum limit inferiors
Contour curve；8- formed features Ditermination of cam profile.
Embodiment
Below in conjunction with the accompanying drawings technical scheme is further illustrated with specific formed features example.
This invention describes a kind of size detecting method of use limit range envelope component shaping profile, the detection method
Inspection available for the size detection of the Complex Parts formed features with the short circular arc of multistage, such as AP1000 nuclear fuel assemblies screen work band
Survey, the detection is from contourgraph as survey tool, and detecting step is as follows：
First, by workpiece positioning and clamping to be checked；
Workpiece clamping to be checked on special fixture, the special fixture for having clamped workpiece to be checked is then arranged on contourgraph
Measurement workbench on clamping and fixing device on.
When workpiece to be checked is ap1000 screen work band, when screen work band is placed on the measurement workbench of contourgraph, lattice
Frame band length direction side will be consistent parallel with the direction of motion that contourgraph measures probe.Because screen work bar takes complexity
Many formed features be to be distributed along the length direction of screen work band, therefore detection formed features when to ensure measurement probe fortune
Dynamic direction is consistent parallel with the length direction of screen work band formed features.Because the formed features of screen work band are not all parallel
Or vertical distribution takes in screen work bar, also there are the formed features in 45 degree of directions, when detecting these features, then need contourgraph
Clamping and fixing device on test desk rotates 45 degree or 135 degree (clockwise or counterclockwise) so that contourgraph is surveyed during detection
Probe is measured with formed features into 45 degree or 135 degree of angles, the length of the direction of motion of probe just with formed features when so measuring
Direction is consistent, is easy to detection.
2nd, profile scan detection is carried out to workpiece to be checked, obtains contour curve；
Fixed on clamping and fixing device on the measurement workbench of contourgraph after workpiece to be checked and special fixture, according to treating
The size requirement of workpiece product is examined, the suitable measurement probe of selection carries out profile to measured component shaping feature to be checked and swept
Detection is retouched, and obtains contour curve.
When obtaining contour curve to component shaping mark scanning to be measured using contourgraph, before, during and after being carried out to detected part
At least three levels are scanned, and the original position and final position of the feature contour of each level need to be consistent, and as far as possible
Ensure that the scanning profile length of a curve obtained is consistent.Manipulating contourgraph makes measurement probe slip over measured workpiece under pressed status
Surface obtain formed features contour curve.
3rd, demarcation measurement is carried out to the contour curve that scanning is obtained, it is determined that the measurement size of final workpiece to be checked；
Demarcation measurement is carried out to the contour curve of many levels in step 2, its average value is taken as final workpiece to be checked
Measure size.
4th, determinating area is obtained using envelope method；
The envelope rule used is the technical requirements and the margin of tolerance by being given on workpiece drawing to be checked, using maximum
Envelope principle is drawn on the maximum limes superiors contour curve 5, minimum limit inferior contour curve 7 and drawing technical requirements of element to be measured
Nominal contour curve 6.
Then maximum limes superiors contour curve 5 and minimum limit inferior contour curve 7, Yi Jigong are imported into contourgraph software
Claim contour curve 6, as shown in Figure 3.It is parallel to each other between maximum limes superiors contour curve 5 and minimum limit inferior contour curve 7, two
Determinating area is formed between person, nominal contour curve 6 is formed features theoretical curve, and it is located at the centre position of determinating area.
5th, the global shape of component shaping profile to be checked is detected；
By the measurement size of workpiece to be checked in step 3 obtain workpiece to be checked formed features Ditermination of cam profile 8 (see
Fig. 3), the shape such as formed features Ditermination of cam profile 8 and nominal contour curve 6 is basically identical, then carries out next step detection, if
Shape is inconsistent, then it is underproof that explanation, which examines workpiece,.
6th, the overall dimensions of component shaping profile to be checked are detected, judges whether workpiece to be checked closes using envelope method
Lattice.
The formed features Ditermination of cam profile 8 consistent with nominal contour curve 6 of shape in step 5 is placed into maximum
In the determinating area that limit contour curve 5, minimum limit inferior contour curve 7 are formed, if the energy of formed features Ditermination of cam profile 8
It is enough to be included in completely in this determinating area, then illustrate that the formed features for examining workpiece meet drawing technical requirements, examine workpiece
Formed features are qualified, conversely, unqualified.
Maximum limes superiors contour curve 5 is as shown in figure 4, because the principle of envelope method is in tolerance technology in envelope method
Maximum containing is interval to obtain for scope, i.e., the judgement of maximum limes superiors contour curve 5 and the minimum composition of limit inferior contour curve 7
Region area is maximum, therefore when being measured using envelope method, to recessed in the maximum limes superiors contour curve 5 of complicated formed features
Short circular arc portion selects the least limit offset dimensions of arc radius, and convex circular arc portion selects greatest limit deviation ruler
Very little, the size technique of painting principle of other straight length portions is identical, ensures to contain intervening areas under the premise of size technologies requirement is met
Maximization.Therefore in Fig. 4 in maximum limes superiors contour curve 5 to the recessed corresponding circular arc of circular arc s1, s3, s6 and s8 selection partly
Footpath least limit deviation (minimum value) is drawn；Convex circular arc s2, s4, s5 and s7 is selected to arc radius greatest limit deviation
(maximum) draws.
Minimum limit inferior contour curve 7 on the basis of technical requirements are met as shown in figure 5, in order to ensure most in envelope method
The determinating area area of big limes superiors contour curve 5 and the minimum composition of limit inferior contour curve 7 is maximum, is measured using envelope method
When, the maximum pole of arc radius is selected in the minimum limit inferior contour curve 7 of complicated formed features to recessed short circular arc portion
Offset dimensions are limited, and convex circular arc portion selects least limit offset dimensions, the size technique of painting of other straight length portions is former
Reason is identical, and such way can ensure to contain intervening areas maximum under the premise of size technologies requirement is met.Therefore in Fig. 5 most
It is (maximum to the corresponding arc radius greatest limit deviation of recessed circular arc r1, r3, r6 and r8 selection in small limit inferior contour curve 7
Value) draw；Convex circular arc r2, r4, r5 and r7 selects corresponding arc radius least limit deviation (minimum value) to draw.
Although the principle of the present invention is described in detail above in conjunction with the preferred embodiments of the present invention, this area skill
Art personnel are it should be understood that above-described embodiment is only the explanation of the exemplary implementation to the present invention, not to present invention bag
Restriction containing scope.Details in embodiment is simultaneously not meant to limit the scope of the invention, in the spirit without departing substantially from the present invention and
In the case of scope, any equivalent transformation based on technical solution of the present invention, simple replacement etc. are obvious to be changed, and is all fallen within
Within the scope of the present invention.
Claims (6)
1. a kind of size detecting method of use limit range envelope component shaping profile, it is characterised in that characterized in that, institute
Detection method is stated to comprise the following steps：
Step 1: by workpiece positioning and clamping to be checked；
Workpiece clamping to be checked on special fixture, the special fixture for having clamped workpiece to be checked is then arranged on measurement workbench
On clamping and fixing device on；
Step 2: carrying out profile scan detection to workpiece to be checked, contour curve is obtained；
Using survey tool, at least three levels before, during and after the detected part progress of workpiece to be checked are scanned, and each level
Feature contour original position and final position need be consistent, and ensure obtain scanning profile length of a curve one
Cause；
Step 3: demarcation measurement is carried out to the contour curve that scanning is obtained, it is determined that the measurement size of final workpiece to be checked；
Demarcation measurement is carried out to the contour curve of many levels described in step 2, its average value is taken as final workpiece to be checked
Measurement size；
Step 4: obtaining determinating area using envelope method；
By the technical requirements and the margin of tolerance given on workpiece drawing to be checked, element to be measured is drawn using maximum envelope principle
Maximum limes superiors contour curve (5), minimum limit inferior contour curve (7) and nominal contour curve (6), the maximum limes superiors wheel
Wide curve (5) and the minimum limit inferior contour curve (7) are parallel to each other, and form determinating area, the nominal wheel therebetween
Wide curve (6) is located at the centre position of the determinating area；
Step 5: being detected to the global shape of component shaping profile to be checked；
The formed features Ditermination of cam profile (8) of workpiece to be checked is obtained by the measurement size of workpiece to be checked in step 3, such as institute
State formed features Ditermination of cam profile (8) consistent with the shape of the nominal contour curve (6), then carry out next step detection, if
Shape is inconsistent, then examined workpiece is unqualified；
Step 6: being detected to the overall dimensions of component shaping profile to be checked, judge that workpiece to be checked is using envelope method
It is no qualified；
The formed features Ditermination of cam profile (8) consistent with the nominal contour curve (6) of shape in step 5 is placed
Into the determinating area, if the formed features Ditermination of cam profile (8) can be included in the determinating area completely,
Then illustrate that the formed features for examining workpiece meet drawing technical requirements, examine component shaping feature eligibility, conversely, unqualified.
2. the size detecting method of use limit range envelope component shaping profile according to claim 1, its feature exists
In in the step 4, in order to ensure the maximum limes superiors contour curve (5) and institute on the basis of technical requirements are met
The determinating area area for stating minimum limit inferior contour curve (7) composition is maximum, in the maximum limes superiors contour curve (5) downwards
Recessed short circular arc portion selects the least limit offset dimensions of arc radius, convex circular arc portion selection greatest limit deviation
Size.
3. the size detecting method of use limit range envelope component shaping profile according to claim 1, its feature exists
In in the step 4, in order to ensure the maximum limes superiors contour curve (5) and institute on the basis of technical requirements are met
The determinating area area for stating minimum limit inferior contour curve (7) composition is maximum, in the minimum limit inferior contour curve (7) downwards
Recessed short circular arc portion selects the greatest limit offset dimensions of arc radius, convex circular arc portion selection least limit deviation
Size.
4. the size detecting method of use limit range envelope component shaping profile according to claim 1, its feature exists
In the measurement workbench is the measurement workbench of contourgraph, and the contourgraph has measurement probe, the measurement probe motion
Direction is consistent parallel with the length direction of the component shaping feature to be checked.
5. the size detecting method of use limit range envelope component shaping profile according to claim 4, its feature exists
In if the formed features of the workpiece to be checked are not parallel or vertical distribution is on the workpiece to be checked, contourgraph survey
Measure the clamping and fixing device rotation respective angles on platform, the direction of motion of the probe and the length side of formed features when making measurement
To consistent.
6. the size detection side of use limit range envelope component shaping profile according to any one of claim 1 to 5
Method, it is characterised in that the workpiece to be checked is AP1000 nuclear fuel assembly screen work bands.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710153441.9A CN106949872A (en) | 2017-03-15 | 2017-03-15 | A kind of size detecting method of use limit range envelope component shaping profile |
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| CN201710153441.9A CN106949872A (en) | 2017-03-15 | 2017-03-15 | A kind of size detecting method of use limit range envelope component shaping profile |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109781043A (en) * | 2019-02-13 | 2019-05-21 | 广东省计量科学研究院（华南国家计量测试中心） | Heat exchange fin key parameter calculation method and analytical calculation platform |
| CN113532242A (en) * | 2020-09-14 | 2021-10-22 | 无锡透平叶片有限公司 | Design method of profile measuring template of large-torsion blade |
| CN114166136A (en) * | 2021-12-07 | 2022-03-11 | 北京星航机电装备有限公司 | Method and device for acquiring diameter of lip of air inlet |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101762259A (en) * | 2010-01-08 | 2010-06-30 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for detecting sectional profile of transition section of gas turbine combustion chamber |
| CN102944204A (en) * | 2012-11-12 | 2013-02-27 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for detecting cross-section profile by utilizing two-dimensional measuring machine |
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2017
- 2017-03-15 CN CN201710153441.9A patent/CN106949872A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101762259A (en) * | 2010-01-08 | 2010-06-30 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for detecting sectional profile of transition section of gas turbine combustion chamber |
| CN102944204A (en) * | 2012-11-12 | 2013-02-27 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for detecting cross-section profile by utilizing two-dimensional measuring machine |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109781043A (en) * | 2019-02-13 | 2019-05-21 | 广东省计量科学研究院（华南国家计量测试中心） | Heat exchange fin key parameter calculation method and analytical calculation platform |
| CN113532242A (en) * | 2020-09-14 | 2021-10-22 | 无锡透平叶片有限公司 | Design method of profile measuring template of large-torsion blade |
| CN114166136A (en) * | 2021-12-07 | 2022-03-11 | 北京星航机电装备有限公司 | Method and device for acquiring diameter of lip of air inlet |
| CN114166136B (en) * | 2021-12-07 | 2023-12-01 | 北京星航机电装备有限公司 | Method and device for obtaining lip diameter of air inlet channel |
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Application publication date: 20170714 |