On-line virtual detection and evaluation method for the forming quality of ultra-thin-wall easily deformable cylindrical parts

A quality evaluation and molding quality technology, applied in the field of elastic, can solve the problems that have not yet entered the engineering application, cannot accurately obtain the quality status after processing, and achieve the effects of saving production costs, improving efficiency, and improving accuracy

Active Publication Date: 2020-08-04
CENT SOUTH UNIV
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Problems solved by technology

For thin-walled parts that are easily deformed, complex curved surfaces, and large-sized workpieces, the quality status after processing cannot be accurately obtained
The existing technology has not yet entered the actual engineering application for the online evaluation of the forming quality of easily deformable flexible cylindrical parts

Method used

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  • On-line virtual detection and evaluation method for the forming quality of ultra-thin-wall easily deformable cylindrical parts
  • On-line virtual detection and evaluation method for the forming quality of ultra-thin-wall easily deformable cylindrical parts
  • On-line virtual detection and evaluation method for the forming quality of ultra-thin-wall easily deformable cylindrical parts

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Embodiment Construction

[0029] Such as figure 1 As shown, according to the surface model of the easily deformable cylindrical part reconstructed according to the online detection data, combined with the relationship between the material, the cylindrical part and the elastic deformation, the virtual uniform pressure is applied inside the cylindrical part to make it overcome its own gravity and other elasticity Deformation, to achieve the real state in actual use, obtain the quality evaluation model of the test piece, and compare it with the ideal processing state model to complete the quality evaluation. The main steps of a typical quality evaluation method are as follows:

[0030]Step 1: Reconstruction model based on online detection data. Using non-contact measuring devices, adopt step-by-step or spiral data measurement methods to obtain the contour information of the workpiece processing status; through data analysis, elimination and processing, obtain the real displacement data of the cross-secti...

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Abstract

The invention discloses a method for forming quality online virtual detection and evaluation of an ultra-thin-wall easily-deformed cylindrical element. According to an easily-deformed cylindrical element curve surface model reconstructed through online detection data and the relation among a material, the cylindrical element and elastic deformation, uniform distribution pressurizing is virtualized in the cylindrical element, so that the cylindrical element overcomes gravity and other elastic deformation, a real condition during practical use is achieved, a to-be-detected element quality evaluation model is obtained and compared with an ideal machining state model, and quality evaluation is completed. The method for forming quality (geometrical precision) evaluation of the ultra-thin-wall easily-deformed cylindrical element on the basis of a finite element is innovatively disclosed, the machining state of the ultra-thin-wall cylindrical element is provided, and the real-time state of the forming quality (geometrical precision) of the cylindrical element is also provided. The quality evaluation method is high in efficiency and precision, has the advantages of being more accurate and quicker to use, and can be widely used for quality (geometrical precision) evaluation of other easily-deformed, ultra-thin-wall and high-precision workpieces.

Description

technical field [0001] The invention belongs to the quality (form and position accuracy) evaluation method of deformable ultra-thin-wall cylindrical parts after processing, and specifically relates to reconstructing the easily deformable cylindrical part model according to online detection data, and according to the relationship between materials, cylindrical parts and elastic deformation , through the finite element method, pressurize the virtual inside of the cylindrical part to make it reach the critical state of elastic deformation. According to the corresponding definition of shape and position accuracy, a quality evaluation model is obtained, and compared with the ideal model, the quality evaluation is completed. The method for evaluating the processing quality (form and position accuracy) of cylindrical parts is especially suitable for ultra-thin-walled cylindrical parts with smooth changes in cylindrical section curves. Background technique [0002] When the ultra-th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F119/14
CPCG06F30/17G06F30/367
Inventor 谭建平文学黄涛李新和刘溯奇曾乐王帅喻哲钦
Owner CENT SOUTH UNIV
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