Tool abrasion state identification method based on multi-feature fusion

A technology of multi-feature fusion and tool wear, which is applied in the direction of manufacturing tools, metal processing machinery parts, measuring/indicating equipment, etc., can solve the problem of inaccurately reflecting the state of tool wear, so as to avoid incomplete reflection of information and rapid attenuation , the effect of improving the recognition efficiency
CN110153801AActive Publication Date: 2019-08-23SOUTHWEST JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
SOUTHWEST JIAOTONG UNIV
Publication Date
2019-08-23

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Abstract

The invention relates to a tool abrasion state identification method based on multi-feature fusion. A plurality of methods are utilized for extracting feature information of vibration acceleration signals and cutting force signals, optimization is conducted on a feature set based on singular value decomposition, and the tool abrasion state identification precision is improved. According to the tool abrasion state identification method, mainly, the cutting force signals and the vibration signals are fused for feature extraction, the feature set is optimized through the singular value decomposition method, then, the feature set is input into a least squares support vector machine tool abrasion state identification model optimized on the basis of the genetic algorithm for identification, andthe tool abrasion state is output. According to the tool abrasion state identification method based on multi-feature fusion, the cutting force signals and the vibration acceleration signals are fusedfor feature extraction to serve as input, and the tool abrasion state identification precision is improved.
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Description

technical field

[0001] The invention relates to a tool wear state identification method based on multi-feature fusion, which belongs to the field of machining tool and detection. Background technique

[0002] Machining and manufacturing is an important part of the manufacturing industry. In the process of batch manufacturing, CNC machine tools are the key equipment in the manufacturing process. The core of the CNC machine tool machining process is to use the tool to remove excess material from the machined workpiece to form a machined surface. Since the tool is directly involved in the machining process, the state of the tool is directly related to the quality of the workpiece and production efficiency, so ensuring the good condition of the tool is the key to ensuring product quality and production efficiency. In the mass production process, about 20% of the downtime is caused by tool bluntness, and the economic cost caused by tool bluntness and replacement accounts for 5% ...

Claims

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