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Error Partition Representation Method

A kind of error area and error technology, which is applied in the direction of instruments, complex mathematical operations, manufacturing computing systems, etc., can solve the problems of not being able to clearly characterize the regional distribution characteristics, and achieve an easy-to-use effect

Active Publication Date: 2018-01-16
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing error characterization method cannot clearly characterize the regional distribution characteristics, and invent a method to divide the region according to the error distribution law, and then use the corresponding index to measure, so as to clearly characterize the regional characteristics of the error The error partition representation method of

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with accompanying drawing and example parts.

[0036] An error partition characterization method, the specific steps are:

[0037] First, obtain the actual surface of the current processing object by measurement and compare it with the theoretical surface, then discretize it into basic units and obtain the errors of all basic units;

[0038] Secondly, on the theoretical surface, the theoretical surface is divided into qualified areas and out-of-tolerance areas according to the errors of all basic units;

[0039] Third, according to the error law, the out-of-tolerance area is further subdivided into multiple error areas, and finally each error area is characterized; the basic unit is a point unit and a triangular grid unit in a form that can discretize the error Or quadrilateral grid unit; the qualified area is: the error of all basic units in the area is within the given tolerance range; the out-of-to...

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Abstract

The invention discloses an error area characterization method. First, an actual surface of a current processing object is obtained through measurement and compared with a theoretical surface, the actual surface is dispersed into basic units, and the error of all the basic units is obtained. Then, division is carried out according to the error rules of all the basic units. Finally, each error area is characterized. Compared with the original error characterization method, the error area characterization method can be used to characterize error more clearly, and provides a more detailed basis for quality control and error traceability in the manufacturing process.

Description

technical field [0001] The invention relates to an error characterization method, specifically a method for clearly characterizing the regional characteristics of errors by dividing regions according to the error distribution law in product manufacturing, and then using corresponding indicators to measure. Background technique [0002] In product manufacturing, factors such as process level, equipment performance, and workpiece material will cause errors in the workpiece. At present, geometric tolerances such as roundness, cylindricity, and contour can be used to describe the shape accuracy of workpieces. However, they are indicators based on the overall workpiece and can only be used to check whether the product is qualified and cannot express local errors. For complex surface workpieces, such as aircraft skins, the actual surface may contain various error areas including local errors, gradient errors, and uniform errors, and the geometric tolerance cannot express the regio...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/06G06Q50/04G06F17/18
CPCY02P90/30
Inventor 郝小忠李迎光邓天池
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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