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Assembly quality-oriented product part matching method and device

A technology for parts selection and quality, applied in special data processing applications, complex mathematical operations, design optimization/simulation, etc., can solve problems such as too theoretical and low matching results, reduce matching costs and ensure matching Accuracy, the effect of ensuring the success rate of matching

Active Publication Date: 2020-12-18
HOHAI UNIV CHANGZHOU +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is too theoretical, and the matching result rate is too low

Method used

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  • Assembly quality-oriented product part matching method and device
  • Assembly quality-oriented product part matching method and device
  • Assembly quality-oriented product part matching method and device

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Embodiment 1

[0063] like figure 1 As shown, an embodiment of the present invention provides a method for matching product parts oriented to assembly quality. The matching method specifically includes the following steps:

[0064] Step 1: Establish a comprehensive matching model of the dimensional chain; wherein, the matching model of the embodiment of the present invention is aimed at parts of different importance levels (assembly quality), and its matching modes are different. Specifically, for non-core components, the batch selection mode is adopted; for core components, the selection mode is selection; for general components in between, the mode is mostly the tolerance zone segmentation mode.

[0065] In the embodiment of the present invention, the assembly accuracy and assembly success rate in the product assembly process are evaluated as important matching indicators. Therefore, in order to construct a matching model that takes both assembly accuracy and assembly success rate into acc...

Embodiment 2

[0075] like Image 6 and Figure 7 As shown, the present invention provides a kind of product part matching device, comprises following module:

[0076] The model building block is used to establish the comprehensive selection model of the dimensional chain;

[0077] A function building block, used to construct a quality loss objective function according to the comprehensive matching model;

[0078] The scheme solving module uses the genetic algorithm to solve the quality loss objective function to obtain the matching scheme.

[0079] Specifically, such as Figure 7 As shown, the model building module of the embodiment of the present invention includes a mode matching unit, wherein the model matching unit is used to adopt the following matching modes for parts with different assembly characteristics:

[0080] a) For the core components, the quality loss measurement is carried out by using the look and feel characteristics;

[0081] b) For general components, the mass loss...

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Abstract

The invention provides an assembly quality-oriented product part matching method and device, and belongs to the technical field of product assembly precision control. The matching method comprises thefollowing steps: establishing a dimension chain comprehensive matching model; constructing a mass loss objective function according to the matching model; and solving the mass loss objective functionby using a genetic algorithm to obtain a matching scheme. The matching precision and the matching success rate can be guaranteed, the matching efficiency can be improved, and the matching cost can bereduced.

Description

technical field [0001] The invention relates to the technical field of product assembly precision control, in particular to a method and device for selecting product parts for assembly quality. Background technique [0002] As a complex product, high-end equipment has the characteristics of exploratory, advanced, and complex. Its assembly is usually discrete assembly, which has the characteristics of long operation cycle, mainly manual assembly, and single-piece or small-batch production. Taking the aircraft assembly line as an example, it mainly includes fuselage, wing, tail, engine, landing suspension and chassis. Taking the Airbus A320 as an example, it contains a total of 500,000 to 1.2 million parts, among which the number of rivets is The number exceeds 3,000, and the complexity of the assembly process can be imagined. The existing matching methods are (1) optimizing the assembly tolerance zone to improve assembly accuracy. However, there are huge defects in optimizi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F17/11
CPCG06F30/20G06F17/11Y02P90/30
Inventor 裴凤雀苑明海顾文斌李亚东张晨希
Owner HOHAI UNIV CHANGZHOU