Method for automatically identifying and monitoring on-line machined workpieces of numerical control machine tool

A technology for processing workpieces and CNC machine tools, which is applied in the fields of information processing and machinery manufacturing, and can solve problems such as statistical errors and waste

Inactive Publication Date: 2010-05-19
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to solve the problem that the processing progress information of the workpieces in the workshop mainly relies on manual statistics, and statistical errors often occur during mixed proc

Method used

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  • Method for automatically identifying and monitoring on-line machined workpieces of numerical control machine tool
  • Method for automatically identifying and monitoring on-line machined workpieces of numerical control machine tool
  • Method for automatically identifying and monitoring on-line machined workpieces of numerical control machine tool

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Embodiment

[0112] A method for automatic identification and monitoring of workpieces processed online by CNC machine tools. The automatic identification and monitoring hardware based on this method is composed of active power transmitters, serial port A / D conversion modules, and information interaction terminals. The system structure is shown in Figure 5 , the active power transmitter is installed at the input end of the spindle motor inverter of the CNC machine tool, responsible for collecting the input power signal of the machine tool spindle; the serial port A / D acquisition module is responsible for converting the analog signal into a digital signal to obtain the power value information of the workpiece processing, And the conversion result is sent to the information interaction terminal in real time. The power value sampling frequency is 20Hz and the precision is 12 bits. The information interaction terminal is responsible for processing the power information such as template extracti...

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Abstract

The invention discloses a method for automatically identifying and machining and monitoring on-line machined workpieces of a numerical control machine tool, which comprises the steps that: firstly, the possible spindle machining power information when different on-line workpieces are machined is subjected to the processes of the selection of machining feature vectors, the formation of a feature template sequence, time warping, the calculation of matching distance, the clustering of the distance and the like to form a multi-workpiece characteristic template base; when the workpeices are machined, the acquired workpiece real-time machining power information is processed to form a feature vector sequence; the sequence is subjected to processing of the time warping, the calculation of the matching distance and the like with templates in the characteristic template base; and the type of the machined workpieces can be judged and the machining number is accumulated or the machining parameters of the machining process are monitored according to the matching distance and a set threshold value.

Description

technical field [0001] The invention relates to the technical fields of machinery manufacturing and information processing, belongs to information collection and signal processing methods in a manufacturing execution system, and specifically relates to an automatic identification and processing process monitoring method for online processing workpieces on a numerically controlled machine tool. Background technique [0002] Workpiece processing progress information and process monitoring in machining workshops is one of the important information to support workshop production process management and optimal operation. Processing progress information and process monitoring include a lot of content, the most basic of which is the workpiece information being processed, the quantity that has been processed, and whether the processing process is processed according to the technical parameters of the process. [0003] At present, in some workshops with a high degree of automation, b...

Claims

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Application Information

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IPC IPC(8): G05B19/406
Inventor 鄢萍贺晓辉易润忠何彦刘飞
Owner CHONGQING UNIV
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