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Method for improving monitoring threshold and signal synchronization accuracy of numerical control(NC) processing

A signal synchronization and accuracy technology, applied in the direction of program control, computer control, general control system, etc., can solve the problems of error accumulation, inability to realize accurate synchronization of signal and monitoring threshold, and easy fluctuation of signal acquisition frequency, so as to eliminate the influence , Improve monitoring accuracy and improve effectiveness

Active Publication Date: 2018-09-04
SOUTHWEST JIAOTONG UNIV +1
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Problems solved by technology

However, in this synchronization method, the signal acquisition frequency is prone to fluctuations, resulting in error accumulation after long-term monitoring, and the accurate synchronization of the signal and the monitoring threshold cannot be achieved.

Method used

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  • Method for improving monitoring threshold and signal synchronization accuracy of numerical control(NC) processing
  • Method for improving monitoring threshold and signal synchronization accuracy of numerical control(NC) processing
  • Method for improving monitoring threshold and signal synchronization accuracy of numerical control(NC) processing

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Embodiment Construction

[0041] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. The inventive method comprises:

[0042] Step 1: When the machine tool is teaching and processing, calculate the number of collected data and the threshold number of each NC program segment through the information collected in real time.

[0043] Calculate the theoretical processing time of the NC segment according to the collected position coordinates of the beginning and end points of the NC program segment, and then calculate the theoretically collected data number of the NC program segment according to the data collection frequency, and then determine the threshold number of the NC program segment that needs to be calculated . details as follows:

[0044] (1) The calculation process of the number of collected data during teaching processing

[0045] Machining T of an NC block c for:

[0046]

[0047] In the formula: T c is ...

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Abstract

The invention discloses a method for improving monitoring threshold and signal synchronization accuracy of NC processing. During demonstrative processing of a machine tool, information collected in real time is used to calculate the number of collection data as well as the number of thresholds in each NC program segment; when the machine tool is in a monitoring mode, a synchronization error is calculated in real time after each NC program segment; a synchronization error calculation result is analyzed to determine an advanced, lagged or normal state of the monitoring threshold; and if the monitoring threshold is advanced or lagged, an error elimination method is used to eliminate the synchronization error. Thus, the monitoring threshold and signal synchronization validity are improved greatly, and the monitoring accuracy is improved.

Description

technical field [0001] The invention relates to the technical field of numerical control machining process monitoring, in particular to a method for improving the synchronization accuracy of a threshold value and a signal in the process of real-time machining monitoring. Background technique [0002] In the process of CNC machining monitoring, in order to monitor the signal, it is necessary to set a normal threshold range for the real-time collected signal, and then read and compare the threshold and signal in turn to judge the processing status. At present, most of the research on CNC machining monitoring is carried out in the direction of signal processing. According to previous research, during the signal acquisition process, the frequency of acquisition will fluctuate, which will affect the synchronization accuracy of the monitoring threshold and signal. make an impact. [0003] The synchronization between the threshold and the signal refers to comparing the signal coll...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/406
CPCG05B19/406G05B2219/45103
Inventor 丁国富江磊韩雷丁国华付玉龙付建林
Owner SOUTHWEST JIAOTONG UNIV
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