Accurate measurement method for horizontal punctuations on surface of fixed-wing aviation product

Abstract

A method for accurately measuring horizontal points on the surface of a fixed-wing aviation product comprises the steps that firstly, a measuring system is designed, the measuring system comprises a measuring sub-quantity main system and measuring sub-quantity systems, the measuring sub-quantity main system is composed of a plurality of measuring sub-quantity systems, and the measuring sub-quantity systems with the corresponding number are arranged according to the number of specific horizontal measuring points of the fixed-wing aviation product; the method comprises the following steps: sequentially assembling a probe quantum system which comprises a limiting shaft, a sleeve positioner, a high-precision gauge block and a high-precision gauge block handle, and then when the lower angle of the airfoil horizontal mark point is measured, firstly sleeving the limiting shaft into the sleeve positioner, then installing the high-precision gauge block on the limiting shaft, and tightening the limiting shaft and the high-precision gauge block; according to the method, the high-precision gauge block is inserted between the gauge quantum system and the airfoil, the measured value of the high-precision gauge block and the measured value of the millesimal piece are accumulated to obtain the measured value of the actually-measured horizontal marking point, then the measured value is substituted into a dihedral calculation formula, the dihedral of the airfoil of the product of the sortie can be accurately calculated, and the measurement precision and the measurement efficiency are effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of aircraft mark measurement, and in particular to a method for accurately measuring horizontal marks on the surface of a fixed-wing aviation product. Background Art

[0002] The wing surface of fixed-wing aviation products is mainly used to generate lift for aircraft during flight. The downward angle formed during its manufacturing and assembly process directly affects the flight attitude of the aircraft. During the manufacturing and installation of the wing surface, punctuation indicators are often used to measure the distance between the horizontal punctuation points on the wing surface and the horizontal reference plane to reflect the downward angle of the wing surface. However, since the punctuation indicators are installed in a reference scale and the minimum accuracy of the scale is 0.5mm, when the pointer is between two scales, there is a human estimate when reading the punctuation indicator value. For the above reasons, the punctuation indicator has low accuracy and the punctuation references are inconsistent. The measured results cannot reflect the actual downward angle of the wing surface, and the downward angle measurement value is easily distorted. Summary of the invention

[0003] The technical problem solved by the present invention is to provide a method for accurately measuring horizontal marks on the surface of fixed-wing aviation products to solve the problems in the above-mentioned background technology.

[0004] The technical problem solved by the present invention is achieved by adopting the following technical solutions: A method for accurately measuring horizontal points on the surface of a fixed-wing aviation product, the specific steps are as follows: 1) Design the measurement system The measurement system includes a main measuring system and a sub-measuring system. The main measuring system is composed of multiple sub-measuring systems. The corresponding number of sub-measuring systems is set according to the specific number of horizontal measurement points of fixed-wing aviation products. 2) Measuring horizontal points on the surface of fixed-wing aviation products ①, assemble the measuring sub-quantum system, the measuring sub-quantum system includes a limit shaft, a sleeve positioner, a high-precision gauge block, and a high-precision gauge block handle, the limit shaft is arranged in the sleeve positioner, the limit shaft is connected to the high-precision gauge block through a thread, and the high-precision gauge block handle is arranged on the high-precision gauge block; ②. Measuring horizontal points I. When measuring the angle below the horizontal mark of the wing surface, first insert the limit shaft into the sleeve locator, then install the high-precision gauge block on the limit shaft, and tighten the limit shaft and the high-precision gauge block; II. Insert the thousandth piece between the measuring quantum system and the wing surface respectively; III. The measured values ​​of the high-precision gauge block and the micrometer piece are accumulated to obtain the measured value y of the measured horizontal mark point, y=t+t1; Among them, t is the measured value of the high-precision gauge block, and t1 is the measured value of the thousandth piece; IV. Record the measured value y of each horizontal punctuation mark respectively, and then substitute the measured value y into the given downwash angle calculation formula in the design to accurately calculate the downwash angle of the wing surface of the product in this flight.

[0005] In the present invention, the position of the sleeve locator is exactly the same as the X and Z coordinate values of the horizontal punctuation marks of the fixed-wing aviation product, and the positions of the horizontal punctuation marks are made and marked on the theoretical outer surface of the wing surface. To ensure that the measured value of the measurement system is consistent with the downwash angle measured by the fixed-wing aviation product through horizontal measurement, each sub-measurement quantum system sets the sleeve locator at an equal distance of H along the Y coordinate with the marked point as the reference. The upper surface of the sleeve locator is the reference point for the locator installation, and the installation coordinate point of the sleeve locator is the horizontal reference point (X, Y - H, Z).

[0006] In the present invention, the sleeve locator and the limit shaft are in a high-precision hole-shaft clearance fit to ensure that the measurement point does not shift and to ensure the accuracy of the measurement point.

[0007] In the present invention, the thousandth slice is controlled at the highest precision of 0.01 mm.

[0008] Beneficial effects: Without relying on a laser tracker for data analysis, the present invention can directly measure the true value of the downwash angle of the wing surface during the wing surface assembly and manufacturing process. The measurement result is consistent with the data during the overall machine horizontal measurement, effectively improving the measurement accuracy and measurement efficiency. Brief Description of the Drawings

[0009] Figure 1 It is a schematic diagram of the horizontal punctuation marks in the preferred embodiment of the present invention.

[0010] Figure 2 It is a schematic diagram of the installation of the sub-measurement quantum system in the preferred embodiment of the present invention.

[0011] Figure 3 It is a schematic diagram of the structure of the sub-measurement quantum system in the preferred embodiment of the present invention. Detailed Embodiment

[0012] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below with reference to specific drawings.

[0013] A precise measurement method for the horizontal punctuation marks on the surface of a fixed-wing aviation product, the specific steps are as follows: 1) Design the measurement system The measurement system includes a main sub-measurement system and sub-measurement quantum systems. The main sub-measurement system is composed of multiple sub-measurement quantum systems. According to the specific number of horizontal measurement points of the fixed-wing aviation product, several sub-measurement quantum systems 1 are set, and the number of sub-measurement quantum systems 1 is the same as the number of horizontal measurement points of the fixed-wing aviation product; 2) Measuring the horizontal punctuation marks on the surface of fixed-wing aviation products Taking three measurement points a, b, and c as examples for illustration, as Figures 1 to 3 shown, along the direction perpendicular to the horizontal plane at the horizontal punctuation marks on the wing surface 2, a measurement main system is set according to the specific positions of the horizontal punctuation marks. The measurement subsystem 1 includes a limit shaft 1-1, a sleeve locator 1-2, a high-precision gauge block 1-3, and a high-precision gauge block handle 1-4; The position of the sleeve locator 1-2 is exactly the same as the X and Z coordinate values of the horizontal punctuation marks of the fixed-wing aviation product, and the positions of the horizontal punctuation marks are marked on the theoretical outer surface of the wing surface 2. To ensure that the measured values of the measurement system are consistent with the dihedral angle measured by the fixed-wing aviation product through horizontal measurement, each measurement subsystem offsets the sleeve locator 1-2 as a whole at equal intervals along the Y coordinate by H with the marked points. The upper surface of the sleeve locator 1-2 is the positioning benchmark point for installation, and the installation coordinate point of the sleeve locator 1-2 is the horizontal reference point (X, Y-H, Z); When the traditional horizontal punctuation marks on the surface of fixed-wing aviation products are used, taking the geodetic coordinate system as the reference, the horizontal punctuation marks of the product are reflected by measuring the numbers of the horizontal punctuation marks of the product relative to the reference coordinates; in this embodiment, by integrating the coordinate system of the fixed-wing aviation product, the accurate numbers of the horizontal punctuation marks of the fixed-wing aviation product are directly measured during the manufacturing process of the fixed-wing aviation product. H is the offset distance and is the unified reference point for the horizontal punctuation marks; To ensure the accuracy of the measurement system, the sleeve locator 1-2 and the limit shaft 1-1 are in a high-precision hole-shaft clearance fit to ensure that the measurement points do not shift and to ensure the accuracy of the measurement points; The limit shaft 1-1 is arranged inside the sleeve locator 1-2. The limit shaft 1-1 is connected to the high-precision gauge block 1-3 through a thread, and the high-precision gauge block handle 1-4 is arranged on the high-precision gauge block 1-3; During measurement, a thousandth slice 3 is placed between the wing surface 2 and the high-precision gauge block 1-3; Installation of the measurement subsystem 1: Install the sleeve locator 1-2 on the product manufacturing jig and assembly jig according to the coordinate points, then sleeve the installation limit shaft 1-1 into the sleeve locator 1-2 to limit the installation position of the high-precision gauge block 1-3. The high-precision gauge block 1-3 is placed on the upper surface of the sleeve locator 1-2, and the high-precision gauge block 1-3 and the limit shaft 1-1 are tightened through a thread to make the high-precision gauge block 1-3 fit with the upper surface of the sleeve locator 1-2; The specific use is as follows: I. When measuring the lower corner of the horizontal punctuation marks on the wing surface 2, first sleeve the limit shaft 1-1 into the sleeve locator 1-2, then install the high-precision gauge block 1-3 on the limit shaft 1-1, and tighten the limit shaft 1-1 and the high-precision gauge block 1-3; II. Insert the thousandth shims 3 between the measurement sub-quantum system 1 and the wing surface 2 respectively, and control the thousandth shims 3 with the highest precision of 0.01 mm; III. Accumulate the measured values of the high-precision gauge blocks 1-3 and the thousandth shims 3, and the sum is the measured value y of the actual horizontal punctuation point, y = t + t1; Wherein, t is the measured value of the high-precision gauge blocks 1-3, and t1 is the measured value of the thousandth shims 3; Record the measured values y of each horizontal punctuation point respectively, and then substitute the measured value y into the downward sweep angle calculation formula given by the design, and the downward sweep angle of the wing surface of the product in this flight can be accurately calculated.

[0014] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for accurately measuring horizontal points on the surface of fixed-wing aviation products, characterized in that: The specific steps are as follows: 1) Design the measurement system The measurement system includes a main measuring system and a sub-measuring system. The main measuring system is composed of multiple sub-measuring systems. The corresponding number of sub-measuring systems is set according to the specific number of horizontal measurement points of fixed-wing aviation products. 2) Measuring horizontal points on the surface of fixed-wing aviation products ①, assemble the measuring sub-quantum system, the measuring sub-quantum system includes a limit shaft, a sleeve positioner, a high-precision gauge block, and a high-precision gauge block handle, the limit shaft is arranged in the sleeve positioner, the limit shaft is connected to the high-precision gauge block through a thread, and the high-precision gauge block handle is arranged on the high-precision gauge block; ②. Measuring horizontal points I. When measuring the angle below the horizontal mark of the wing surface, first insert the limit shaft into the sleeve locator, then install the high-precision gauge block on the limit shaft, and tighten the limit shaft and the high-precision gauge block; II. Insert the thousandth piece between the measuring quantum system and the wing surface respectively; III. The measured values ​​of the high-precision gauge block and the micrometer piece are accumulated to obtain the measured value y of the measured horizontal mark point, y=t+t1; Among them, t is the measured value of the high-precision gauge block, and t1 is the measured value of the thousandth piece; IV. Record the measured value y of each horizontal mark respectively, and then substitute the measured value y into the design given downward angle calculation formula to accurately calculate the downward angle of the wing surface of this aircraft product.

2. The method for accurately measuring horizontal points on the surface of a fixed-wing aviation product according to claim 1, characterized in that: The position of the sleeve locator is exactly the same as the X and Z coordinate values ​​of the horizontal mark of the fixed-wing aviation product, and the horizontal mark position is made and marked on the theoretical shape surface of the wing surface. In order to ensure that the measurement value of the measurement system is consistent with the downward angle measured by the horizontal measurement of the fixed-wing aviation product, each measuring sub-system sets the sleeve locator with the marked point position offset H along the Y coordinate as a whole. The upper surface of the sleeve locator is the locator installation reference point, and the installation coordinate point of the sleeve locator is the horizontal reference point (X, YH, Z).

3. The method for accurately measuring horizontal points on the surface of a fixed-wing aviation product according to claim 1, characterized in that: The sleeve locator and the limiting shaft are matched with high-precision hole-shaft clearance.

4. The method for accurately measuring horizontal points on the surface of a fixed-wing aviation product according to claim 1, characterized in that: The millimeter slice is controlled with the highest precision of 0.01mm.

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