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Dimension chain checking method based on three-dimensional model

A three-dimensional model and dimension chain technology, applied in the field of dimension chain verification, can solve problems such as low efficiency, and achieve the effect of improving efficiency, solving analysis and calculation problems, and quickly generating and optimizing promotion.

Inactive Publication Date: 2013-09-18
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0007] In order to overcome the inefficiency of the existing dimensional chain checking method, the present invention provides a dimensional chain checking method based on a three-dimensional model

Method used

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  • Dimension chain checking method based on three-dimensional model

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Embodiment Construction

[0016] refer to figure 1 The present invention will be described in detail.

[0017] In this example, the dimensional chain of a certain type of shaft is checked, and the detailed features irrelevant to the research are omitted in the model, and the dimensional chain is composed of four pairs of dimensions.

[0018] First select the dimension that needs vector labeling, and select the start point and end point for vector labeling. Then select the closed loop in the dimension chain, select "Check Design Dimensions" and click "Check" to check the size. Compensation rings can also be set for dimensions that do not comply with the dimensional chain rules, and the upper or lower tolerances can be adjusted to make them comply with the dimensional chain rules. Select the specified process folder, and also generate a visual diagram of the dimensional chain to display the calibration results.

[0019] In summary, the 3D dimensional chain check of the whole process includes the follo...

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Abstract

The invention discloses a dimension chain checking method based on three-dimensional model and aims to solve the technical problem that a conventional dimension chain checking method is low in efficiency. The technical scheme is that a vector dimension system based on a fixed datum is established by using a space nature of the three-dimensional model. Vector annotation is performed on a three-dimensional dimension, so that the dimension required to be checked under a three-dimensional environment has a vector characteristic, and further automatic checking of a dimension chain is realized according to the principle that the vector sum is zero; and function modules such as automatic judgment of increase and decrease of rings, tolerance modification real-time update, dimension chain check record queries, check record report generation, inter-process dimension chain visual display and the like are provided, so that a dimension chain analysis calculation problem can be solved conveniently, rapidly and accurately. The dimension chain checking efficiency is improved, and an effect for facilitating rapid generation and optimization of a product process is realized. The method can be completed across platforms, and dimension chain checking can be performed through resume vector annotation systems in different modeling software.

Description

technical field [0001] The invention relates to a dimension chain checking method, in particular to a dimension chain checking method based on a three-dimensional model. Background technique [0002] In the design, manufacture, and assembly of mechanical products, in order to represent the size information of the product, it is necessary to mark a large number of sizes, and the size sets are related to each other according to certain rules to form a size chain. Whether it is in the design and manufacture of mechanical products, or in the analysis of performance and quality parameters, the dimensional chain theory has a wide range of applications. Among them, the check of the dimensional chain is an important means of tolerance analysis in the process design stage, and the quality of the check method directly determines the quality of the process design. For multi-ring complex dimensional chains, manual calculation is cumbersome and error-prone. The purpose of people studyi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 万能何剑瑞胡栋刘蔚昕王聪
Owner NORTHWESTERN POLYTECHNICAL UNIV
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