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A Tolerance Optimization Method for Fully Welded Components

An optimization method and all-welding technology, applied in design optimization/simulation, constraint-based CAD, geometric CAD, etc., can solve problems such as no public reports, application objects, and implementation methods are greatly different, so as to achieve tolerance optimization, The effect of improving efficiency

Active Publication Date: 2022-02-11
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The Chinese patent "An Optimal Design Method for Assembly Tolerance" discloses an optimal design method for assembly tolerances, aiming at the minimum processing cost, and establishing an objective function for assembly tolerance optimization, so as to meet the assembly function requirements of the product, but its The scope of application and method are quite different from this patent
The Chinese patent "A Method for Assembly Tolerance Optimization Design Based on Genetic Algorithm" involves an assembly tolerance optimization design method, but its application objects and implementation methods are quite different from this patent
Therefore, there is no public report of literature related to the device for removing the core of the voltage stabilizer electric heating element involved in this patent at home and abroad.

Method used

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  • A Tolerance Optimization Method for Fully Welded Components
  • A Tolerance Optimization Method for Fully Welded Components

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 As shown, the steps are as follows:

[0034] Step A, sort out the design input required for tolerance analysis, specifically including: the component size of the component, design tolerance and other information; the statistical error of the assembly process and fixtures; the statistical results of welding deformation in welding steps obtained from experience ; And focus on statistics of error sources, control methods and control difficulties of each tolerance.

[0035] Step B, determine the tolerance optimization goal, specifically include: the technical indicators expected to be achieved in the current tolerance optimization, such as the qualified rate of finished product quality requirements through tolerance optimization analysis, and the dimensional requirements to be met in the subsequent process.

[0036] Step C, establishing a three-dimensional tolerance analysis model of the fully welded assembly, specifically includes: establishing a three-dime...

Embodiment 2

[0045] On the basis of Embodiment 1, the technical characteristics and advantages of this method are described in more detail through an example of tolerance optimization of a large complex structural part.

[0046] A large complex structural part is welded and connected by various components. The quality of the finished product is closely related to the deflection of the joint components. If the deflection is too large, it will directly affect the subsequent processing. Therefore, it is necessary to calculate the cumulative error of the welding deformation of each working step Predict and optimize the tolerance to ensure that the final deflection meets the processing requirements of the subsequent design process.

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Abstract

The invention discloses a tolerance optimization method of an all-welded assembly, relates to the prediction of the cumulative error of welding deformation of multiple assemblies and the optimization of the tolerance, and solves the problem of the optimization requirement of the tolerance design of the all-welded assembly. The invention includes collecting the original design information of all-welded components, summarizing various tolerance information; establishing a three-dimensional tolerance analysis model, performing simulation analysis on virtual assembly, and predicting the deviation of the total deflection of all-welded components; contribution factors and sensitivities based on each deviation Factors and welding deformation control difficulty factors establish weighted calculation values, and continue to iterate according to the simulation analysis results until the tolerance optimization scheme that meets the optimization goal is obtained and output. The invention can effectively predict the cumulative error of welding deformation, realize tolerance optimization, and improve the efficiency of secondary design of tolerance.

Description

technical field [0001] The invention relates to a method for predicting cumulative errors of welding deformation of multiple components and a tolerance optimization method, in particular to a tolerance optimization method for all welded components. Background technique [0002] In the nuclear industry, shipbuilding industry, energy industry and other fields, many large key components are composed of a large number of multi-type and complex components, and all components are connected by welding, in which the overall prediction of the influence of welding deformation and reasonable optimization of tolerances It is an important factor affecting product quality. Especially some key components in the nuclear industry are represented, which are composed of a large number of components welded and assembled through multiple processes. The manufacturing process is complex, with many welding steps and high precision control requirements. Taking a large complex structural part as a r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/17G06F30/20G06F111/04
CPCG06F30/17G06F30/20G06F2111/04
Inventor 徐少峰何静杨彪刘桂良张义林张家豪姚力夫
Owner NUCLEAR POWER INSTITUTE OF CHINA