CN103557777A - Measuring method of flatness of honeycomb cores of combined frame structures - Google Patents
Measuring method of flatness of honeycomb cores of combined frame structures Download PDFInfo
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- CN103557777A CN103557777A CN201310485345.6A CN201310485345A CN103557777A CN 103557777 A CN103557777 A CN 103557777A CN 201310485345 A CN201310485345 A CN 201310485345A CN 103557777 A CN103557777 A CN 103557777A
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Abstract
The invention belongs to the field of measuring technique, and relates to a measuring method of flatness of honeycomb cores of combined frame structures. A high-accuracy knife straight edge and a set of measuring blocks with a third or higher accuracy class are used, a height difference computational method is combined, and therefore measurement of the flatness of the honeycomb cores is completed. The measuring method has the advantages that the problem that a gradienter or a reflector cannot be used for measuring the flatness of the honeycomb cores because thicknesses of foil sheets are too small, measured values are obtained by using the knife straight edge and the measuring blocks in a combined measuring method, and the measuring method fills gaps in detection methods of the flatness of the honeycomb cores.
Description
Technical field
The invention belongs to field of measuring technique, be specifically related to a kind of measuring method of composite frame structure honeycomb core flatness.
Background technology
The typical structure of composite frame structure honeycomb core as shown in Figure 1, need to be measured the flatness of an independent honeycomb core, also will measure the honeycomb core flatness after combination simultaneously; And at present honeycomb core size morpheme class testing requirement is only related in existing detection standard requirement and the detection method of thickness, core lattice size, core lattice pitch, for the testing requirement of honeycomb core flatness and method all without correlation method.Thickness due to honeycomb core paillon foil only has below 0.1mm conventionally simultaneously, and has both sides framed structure higher than honeycomb core plane, and common method measuring flatness cannot be realized.
Summary of the invention
The object of the present invention is to provide a kind of detection method that is applicable to composite frame structure honeycomb core flatness, solve the problem of honeycomb core method measuring flatness disappearance, improve the parameter evaluation index of group frame honeycomb core structures, meet performance evaluation demand.
Concrete technical scheme is:
For group frame honeycomb core structures, utilize the gauge block of high-precision edge of a knife chi and complete third-class or above accuracy class to detect.The scope of application is determined by edge of a knife chi size, generally within the scope of 400mm * 400mm.
First the honeycomb core framework that is positioned at middle part in Selection and Constitute framework is benchmark honeycomb core plane, records the flatness of benchmark honeycomb core.
Concrete measuring sequence is according to equally distributed principle, determine the measurement point position in honeycomb core plane, at benchmark honeycomb core measured section two ends, place measure-alike gauge block (as 5mm afterwards, guarantee that the thickness of gauge block workplace is greater than the height of two body side frames), edge of a knife chi is placed on gauge block, guarantee that the stable rear gauge block by other sizes tries plug at section gauge point place to the gap between edge of a knife chi and honeycomb core, size when gauge block has just been filled in and two ends gauge block size poor, be the deviation of measurement point to two-end-point line, measure behind each position of complete honeycomb core plane, in all deviates, the difference of maximal value and minimum value is the flatness numerical value of tested honeycomb core,
Honeycomb core flatness in each group frame all thus method record, obtain the flatness of partial cells core.
In the detection method measuring process of integral planar degree, can be in each group frame the mid point of honeycomb core plane as measurement point, carry out the measurement of integral planar degree, maximal value in all deviations and the difference of minimum value are the basic plane number of degrees value of entire combination framework honeycomb core, be added with self flatness numerical value of maximal value and minimum value mid point place plane more afterwards, obtain the integral planar number of degrees value of group frame honeycomb core.
The invention has the beneficial effects as follows overcome honeycomb core flatness due to foil thickness cross thin cannot usage level instrument or the problem measured of catoptron, by the method for using edge of a knife chi and gauge block to carry out multiple measurement, obtain tested numerical value, filled up the blank of honeycomb core flatness detection method.
Accompanying drawing explanation
Fig. 1 is the typical structure schematic diagram of composite frame structure honeycomb core;
Fig. 2 is honeycomb core flatness detection method schematic diagram;
Wherein: 1 is edge of a knife chi; 2 is benchmark gauge block one; 3 is examination plug gauge block; 4 is reference measurement piece two; 5 is group frame; 6 is honeycomb core;
In Fig. 2, the gauge block at two ends is same size, and edge of a knife chi is placed in top, the gauge block of middle gauge block for attempting filling in, and the difference of this gauge block and two ends gauge block size is the deviate of this point; Measure in honeycomb core plane behind each position, in all deviates, the difference of maximal value and minimum value is the flatness numerical value of tested honeycomb core.
Fig. 3 is group frame honeycomb core integral planar degree detection method schematic diagram
Wherein: 1 is edge of a knife chi; 2 is benchmark gauge block one; 3 is examination plug gauge block; 4 is reference measurement piece two; 5 is group frame; 6 is honeycomb core;
The gauge block 2 at two ends in Fig. 3,4 is same size, be placed on respectively the position that keeps to the side of both sides honeycomb core, edge of a knife chi 1 is placed in top, the gauge block of middle gauge block 3 for attempting filling in, fill in position at the point midway of this honeycomb core, the difference of this gauge block and two ends gauge block size is the deviate of this honeycomb core mid point; Complete the flatness numerical value that can calculate entire combination framework honeycomb core after the measurement of all honeycomb core mid points.
Fig. 4 is article one diagonal line numerical value schematic diagram
Fig. 5 is second diagonal line numerical value schematic diagram
Fig. 6 is that honeycomb core flatness is calculated schematic diagram
Embodiment
The method that preparation provided by the invention has the differential arc oxidation film layer of photo-catalysis function specifically realizes as follows:
The first step, carries out the measurement of planeness, and the same two gauge blocks of preferred dimension, as benchmark gauge block, select the gauge block of different size to try plug afterwards, the gauge block of examination plug just can by time, record the numerical value that gauge block is filled in this examination.See Fig. 4 Fig. 5.
Second step, data processing, calculates the flatness of fritter honeycomb core.
Calculate that first to take a wherein cornerwise numerical value be benchmark, an other cornerwise numerical value is converted.The numerical value at every diagonal line two ends carry out contourization, two diagonal line carry out respectively contour after, in all data measureds, find out maximal value and deduct minimum value, obtain honeycomb core flatness, see accompanying drawing 6.
F=d
max-d
min, result is 50-(25) um of=75， unit
The 3rd step, the point midway of measurement bulk honeycomb core, record data.Data processing calculates the honeycomb core flatness of entire combination framed structure.Method and the first step, second step are identical.
Claims (1)
1. a measuring method for composite frame structure honeycomb core flatness, is characterized in that, comprises the steps:
(1) the honeycomb core framework that is positioned at middle part in Selection and Constitute framework, as benchmark honeycomb core plane, records the flatness of benchmark honeycomb core;
Measuring method is according to equally distributed principle, determine the measurement point position in honeycomb core plane, at benchmark honeycomb core measured section two ends, place measure-alike gauge block afterwards, guarantee that the thickness of gauge block workplace is greater than the height of two body side frames, edge of a knife chi is placed on gauge block, guarantee that the stable rear gauge block by other sizes tries plug at section gauge point place to the gap between edge of a knife chi and honeycomb core, size when gauge block has just been filled in and two ends gauge block size poor, be the deviation of measurement point to two-end-point line, measure behind each position of complete honeycomb core plane, in all deviates, the difference of maximal value and minimum value is the flatness numerical value of tested honeycomb core,
(2) the honeycomb core flatness in each group frame all according to said method records, and obtains the flatness of partial cells core;
(3) in each group frame the mid point of honeycomb core plane as measurement point, carry out the measurement of integral planar degree, maximal value in all deviations and the difference of minimum value are the basic plane number of degrees value of entire combination framework honeycomb core, be added with self flatness numerical value of maximal value and minimum value mid point place plane more afterwards, obtain the integral planar number of degrees value of group frame honeycomb core.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108645329A (en) * | 2018-06-22 | 2018-10-12 | 佛山石湾鹰牌陶瓷有限公司 | The test method of ceramic tile flatness |
| CN112393665A (en) * | 2020-11-26 | 2021-02-23 | 西安航天计量测试研究所 | Standard gap sample plate |
| CN113828964A (en) * | 2020-06-23 | 2021-12-24 | 西安核设备有限公司 | Deformation prevention process and device for welding square window on double-layer thin-wall D-shaped cross section |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108645329A (en) * | 2018-06-22 | 2018-10-12 | 佛山石湾鹰牌陶瓷有限公司 | The test method of ceramic tile flatness |
| CN113828964A (en) * | 2020-06-23 | 2021-12-24 | 西安核设备有限公司 | Deformation prevention process and device for welding square window on double-layer thin-wall D-shaped cross section |
| CN112393665A (en) * | 2020-11-26 | 2021-02-23 | 西安航天计量测试研究所 | Standard gap sample plate |
| CN112393665B (en) * | 2020-11-26 | 2024-02-06 | 西安航天计量测试研究所 | Standard clearance template |
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Application publication date: 20140205 |