CN103712532A - Shape and position error detection and evaluation method for skin frame truss structure housing - Google Patents
Shape and position error detection and evaluation method for skin frame truss structure housing Download PDFInfo
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- CN103712532A CN103712532A CN201210380539.5A CN201210380539A CN103712532A CN 103712532 A CN103712532 A CN 103712532A CN 201210380539 A CN201210380539 A CN 201210380539A CN 103712532 A CN103712532 A CN 103712532A
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Abstract
The invention belongs to a detection evaluation method, and specifically relates to a shape and position error detection and evaluation method for a skin frame truss structure housing. The method comprises the following steps: step one, adjusting a measuring bench, and using a crown block to install a transition ring on the measuring bench; step two, according to positioning signs of the transition ring and a product, lifting the product on the transition ring for positioning and clamping; step three, using tools such as a dial gauge, a vernier caliper, standard gauge block and the like to measure the radial error values of the product and performing recording; and step four, calculating shape and position tolerance values and performing recording, the shape and position tolerance values being final detection results. The verification results demonstrate that the measuring results obtained by use of the technology is of high credibility, thus the method provided by the invention can be used as a method for measuring shape and position tolerance of a skin frame truss structure housing product. The technology can also be polarized and applied to the detection and evaluation of a part with quite large profile dimension.
Description
Technical field
The invention belongs to detection assessment method, be specifically related to a kind of morpheme error-detecting and assessment method towards covering frame purlin structure housing.
Background technology
Structural strength is high because having for covering frame purlin structure (claiming again semi-monocoque construction), product quality compared with light, be convenient to the features such as Assembling Production and at home and abroad in space flight and aviation shell product, be widely used.In space industry, this structure housing generally has solid of revolution feature, and diameter is larger, is difficult to its morpheme error to be measured.At present the measuring method of product morpheme error mostly is for miniature workpiece (being generally part), there is no so far the detection technique of the special morpheme error for covering frame purlin assembly structure housing.The Geometrical Tolerance Principle of covering frame purlin assembly structure housing is the important performance indexes of space flight and aviation product, it directly affects the coordination docking of each piece housing of product, and morpheme error how to measure accurately and efficiently covering frame purlin assembly structure housing is puzzlement examination and test of products personnel's a difficult problem always.
Along with scientific and technical fast development, the detection technique of product morpheme error presents variation, high-precision feature.Take deviation from circular from as example, and existing roundness measurement method is divided into contact measurement method and contactless measurement.Contact measurement method is mainly that the survey instruments such as application vernier caliper, dial gauge detect, and conventional have two-point method (diameter method), a three point method (V-type method); These two kinds method is simple to operate but precision is lower.Contactless measurement is mainly that some advanced digitized measurement equipment of application realize the measurement of morpheme error, as coordinate measuring apparatus etc.; This measuring method needs special measuring equipment and operating space, and measuring accuracy is better but measurement cost is higher, is not suitable for workshop in-site measurement.Roundness measurement method is divided into again complete cycle continuous mode method and Discrete Sample Measuring Method according to sample mode difference.Wherein complete cycle continuous mode method adopts special-purpose roundness measuring equipment to measure, and is divided into again turntable type (work table rotation) and rotary shaft (roundness measuring equipment revolution).Turntable type stable performance, is applicable to measure miniature workpiece part.Rotary shaft load-bearing capacity is strong, and rotating accuracy is high.
At present, conventional Circularity error evaluation method mainly contains 4 kinds in the world: 1. Least Square Circle (LSC) method: the center of circle that respective points on measured circle profile to the quadratic sum of circumferential distance of take is minimum circle is the center of circle, and the two concentrically ringed semidiameters that institute makes containing measured circle profile are deviation from circular from.2. maximum inscribed circle (MIC) method: be only applicable to inner circle.Take and be interiorly connected to measured circle profile and radius is the center of circle as the maximum inscribed circle center of circle, make to contain measured circle profile two concentrically ringed semidiameters and be deviation from circular from.3. minimum circumscribed circle (MCC) method: be only applicable to cylindrical.Take and contain measured circle profile and radius is the center of circle as the minimum circumscribed circle center of circle, the two concentric circles semidiameters that institute makes containing measured circle profile are deviation from circular from.4. minimum zone circle (MZC) method: the semidiameter that contains measured circle profile of usining is that two concentrically ringed semidiameters of least error evaluation are as deviation from circular from.
The detection and assessment method of right alignment and the detection and assessment method of circularity are basic identical.The depth of parallelism adopts signing method to carry out more, and evaluates according to the definition of the depth of parallelism.The measurement of flatness is measured and evaluation according to the definition of flatness.What deserves to be explained is, along with the progress of detection technique, the detection method of morpheme error is also progressively improving.
Summary of the invention
The object of this invention is to provide a kind of morpheme error-detecting and assessment method towards covering frame purlin structure housing.
The present invention is achieved in that a kind of morpheme error-detecting and assessment method towards covering frame purlin structure housing, comprises the steps:
Step 1: adjust test desk, according to different product diameters, select the measurement transition rings of different sizes, and utilize a day handlebar transition rings to be arranged on test desk,
Step 2: the witness marker by transition rings and product, product is hung and in transition rings, locates and clamp,
Step 3: utilize the radial error value of the instrument measurement products such as clock gauge, vernier caliper, standard gauge block (for circularity and right alignment, for the depth of parallelism between face and face, should adopt dial gauge to measure end face axial error amount, for flatness, should adopt clearance gauge to measure end face axial error amount) and keep a record
Step 4: calculate form and position tolerance value and keep a record, this form and position tolerance value is exactly final detection result.
A kind of morpheme error-detecting and assessment method towards covering frame purlin structure housing as above wherein, also comprise the steps after step 4
Step 5: repeat step 3～step 4,
Step 6: choose maximum form and position tolerance that duplicate detection draws as final testing result, and keep a record.
A kind of morpheme error-detecting and assessment method towards covering frame purlin structure housing as above, wherein, in described step 3, covering frame purlin structure housing product for different-diameter, during measurement, sampling number should be different, and diameter of the housing is less, and product rigidity is relatively better, measure sampling number and can set lesser, for the housing below 2250mm diameter, adopt 8 circumferential uniform samplings to be enough to meet testing requirement; For housing more than 3350mm diameter, adopt 36 circumferential uniform samplings; Product for diameter between 2250mm～3350mm, can suitably increase to measure and count.
A kind of morpheme error-detecting and assessment method towards covering frame purlin structure housing as above, wherein,
Form and position tolerance measuring method technological parameter is as shown in the table
The depth of parallelism of flatness, face and face all adopts maximal value and minimum difference method to evaluate.
A kind of morpheme error-detecting and assessment method towards covering frame purlin structure housing as above, wherein, described step 5 comprises for different form and position tolerance measuring accuracy requirements, measurement number of times is different, for the form and position tolerance of general precision, measures, and carries out one-shot measurement, and the product of having relatively high expectations for form and position tolerance accuracy of measurement, take multiple measurements the peaked method of getting, each sampling point position of measuring should be avoided repetition as far as possible, and measurement number of times is generally got 3～5 times and is advisable.
The significant beneficial effect of the present invention is: utilize laser tracker to verify carry out the result of form and position tolerance measurement by the art of this patent.The result demonstration, this commercial measurement result has stronger confidence level, can be used as the measuring method of space flight covering frame purlin structure housing product form and position tolerance.This technology also can promote the use of the detection and assessment of the morpheme error of the part that physical dimension is larger.
Section covering frame purlin infrastructure product right alignment form and position tolerance measurement result checking of certain model
| Measuring method | The 1st time | The 2nd time | The 3rd time | The 4th | The 5th |
| The art of this patent | 0.64 | 0.63 | 0.64 | 0.62 | 0.63 |
| Laser tracker method | 0.658 | 0.645 | 0.657 | 0.642 | 0.651 |
| Two kinds of method measurement result differences | 0.018 | 0.015 | 0.017 | 0.022 | 0.021 |
Embodiment
Morpheme error-detecting and an assessment method towards covering frame purlin structure housing, comprise the steps:
Step 1: adjust test desk, according to different product diameters, select the measurement transition rings of different sizes, and utilize a day handlebar transition rings to be arranged on test desk.
For the covering frame purlin structure housing product of different-diameter, during measurement, sampling number should be different.Diameter of the housing is less, and product rigidity is relatively better, measures sampling number and can set lesser.For the housing below 2250mm diameter, adopt 8 circumferential uniform samplings to be enough to meet testing requirement; For housing more than 3350mm diameter, adopt 36 circumferential uniform samplings; Product for diameter between 2250mm～3350mm, can suitably increase to measure and count.
Step 2: the witness marker by transition rings and product, hangs product to locate in transition rings and clamp.
Step 3: utilize the radial error value of the instrument measurement products such as clock gauge, vernier caliper, standard gauge block (for circularity and right alignment, for the depth of parallelism between face and face, should adopt dial gauge to measure end face axial error amount, for flatness, should adopt clearance gauge to measure end face axial error amount) and keep a record.
This patent form and position tolerance measuring method technological parameter is as shown in the table
Attention: the depth of parallelism of flatness, face and face all adopts maximal value and minimum difference method to evaluate
Step 4: in record value input computer form and position tolerance software for calculation, calculate form and position tolerance value and keep a record.
Described form and position tolerance software for calculation utilizes data with existing to carry out data fitting exactly, thereby obtains the software for calculation of result, as long as those skilled in the art understands the matching mathematical formulaes such as least square method, just can write easily the such program in place.
For different form and position tolerance measuring accuracy requirements, measure number of times different.Form and position tolerance for general precision is measured, and only need carry out one-shot measurement.And the product of having relatively high expectations for form and position tolerance accuracy of measurement generally should take multiple measurements the peaked method of getting.Each sampling point position of measuring should be avoided repetition as far as possible.Measurement number of times is generally got 3～5 times and is advisable, and number of times is not enough to eliminate stochastic error very little; Number of times is uneconomical practicality too much.
Step 5: when accuracy of detection is had relatively high expectations, repeat 3～4 steps (general measure 3～5 times).
Step 6: choose maximum form and position tolerance that duplicate detection draws as final testing result, and keep a record.
Claims (5)
1. towards morpheme error-detecting and the assessment method of covering frame purlin structure housing, it is characterized in that: comprise the steps:
Step 1: adjust test desk, according to different product diameters, select the measurement transition rings of different sizes, and utilize a day handlebar transition rings to be arranged on test desk,
Step 2: the witness marker by transition rings and product, product is hung and in transition rings, locates and clamp,
Step 3: utilize the radial error value of the instrument measurement products such as clock gauge, vernier caliper, standard gauge block, and keep a record,
Step 4: calculate form and position tolerance value and keep a record, this form and position tolerance value is exactly final detection result.
2. a kind of morpheme error-detecting and assessment method towards covering frame purlin structure housing as claimed in claim 1, is characterized in that: after step 4, also comprise the steps
Step 5: repeat step 3～step 4,
Step 6: choose maximum form and position tolerance that duplicate detection draws as final testing result, and keep a record.
3. a kind of morpheme error-detecting and assessment method towards covering frame purlin structure housing as claimed in claim 2, it is characterized in that: in described step 3, covering frame purlin structure housing product for different-diameter, during measurement, sampling number should be different, diameter of the housing is less, product rigidity is relatively better, measures sampling number and can set lesser, for the housing below 2250mm diameter, adopts 8 circumferential uniform samplings to be enough to meet testing requirement; For housing more than 3350mm diameter, adopt 36 circumferential uniform samplings; Product for diameter between 2250mm～3350mm, can suitably increase to measure and count.
4. a kind of morpheme error-detecting and assessment method towards covering frame purlin structure housing as claimed in claim 3, is characterized in that:
Form and position tolerance measuring method technological parameter is as shown in the table
The depth of parallelism of flatness, face and face all adopts maximal value and minimum difference method to evaluate.
5. a kind of morpheme error-detecting and assessment method towards covering frame purlin structure housing as claimed in claim 4, it is characterized in that: described step 5 comprises for different form and position tolerance measuring accuracy requirements, measurement number of times is different, and measurement number of times is generally got 3～5 times and is advisable.
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| CN201210380539.5A CN103712532A (en) | 2012-10-09 | 2012-10-09 | Shape and position error detection and evaluation method for skin frame truss structure housing |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104476109A (en) * | 2014-09-25 | 2015-04-01 | 北京航星机器制造有限公司 | Skin structure accurate positioning machining method |
| CN107153727A (en) * | 2017-04-26 | 2017-09-12 | 首都航天机械公司 | The Tolerance Allocation method and device of flexible thin-wall construction based on deformation base |
| CN109117602A (en) * | 2018-10-17 | 2019-01-01 | 江西洪都航空工业集团有限责任公司 | Large scale covering digitizing detection method based on laser tracker |
| CN109435274A (en) * | 2018-09-30 | 2019-03-08 | 航天材料及工艺研究所 | A kind of the positioning assemble method and device of part and composite material skeleton stressed-skin construction |
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| EP0523664A2 (en) * | 1991-07-15 | 1993-01-20 | Fuji Electric Co., Ltd. | A cylindrical container's inner surface tester |
| CN201589588U (en) * | 2009-09-18 | 2010-09-22 | 寿震森 | Detection table for detecting shape and position error of mechanical parts |
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2012
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| JPS63300904A (en) * | 1987-05-30 | 1988-12-08 | Koyo Seiko Co Ltd | Accurate measuring method for circumferential surface shape of circular component |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104476109A (en) * | 2014-09-25 | 2015-04-01 | 北京航星机器制造有限公司 | Skin structure accurate positioning machining method |
| CN107153727A (en) * | 2017-04-26 | 2017-09-12 | 首都航天机械公司 | The Tolerance Allocation method and device of flexible thin-wall construction based on deformation base |
| CN109435274A (en) * | 2018-09-30 | 2019-03-08 | 航天材料及工艺研究所 | A kind of the positioning assemble method and device of part and composite material skeleton stressed-skin construction |
| CN109435274B (en) * | 2018-09-30 | 2021-04-13 | 航天材料及工艺研究所 | Positioning and assembling method and device for part and composite material framework skin structure |
| CN109117602A (en) * | 2018-10-17 | 2019-01-01 | 江西洪都航空工业集团有限责任公司 | Large scale covering digitizing detection method based on laser tracker |
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Application publication date: 20140409 |