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Fuzzy servo control system and method for material identification of insulating ceramic coating-metal EDM

A technology of insulating ceramics and servo control, applied in metal processing equipment, electric processing equipment, circuits, etc., can solve the problems of effective adjustment of insulating ceramic-metal material discharge gap, poor aperture consistency, and low processing efficiency, so as to improve processing efficiency and processing quality, improving the gap discharge state, and ensuring the effect of processing stability

Active Publication Date: 2020-09-15
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the existing electric discharge machining servo control system takes metal as the processing object, the servo control strategy based on metal cannot effectively adjust the discharge gap between insulating ceramics and metal materials according to the current processing material type, and has poor processing stability and poor processing efficiency. In order to solve the problems of low efficiency, poor uniformity of aperture, and large micro-cracks in the interface layer, a fuzzy servo control system and method for identification of insulating ceramic coating-metal EDM materials are provided to realize Identify the material type, and adjust the floating comparison threshold of insulating ceramic coating or metal online according to the material type, realize effective adjustment of ceramic coating and metal discharge gap, and improve the efficiency and quality of EDM of insulating ceramic coating-metal material

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  • Fuzzy servo control system and method for material identification of insulating ceramic coating-metal EDM
  • Fuzzy servo control system and method for material identification of insulating ceramic coating-metal EDM
  • Fuzzy servo control system and method for material identification of insulating ceramic coating-metal EDM

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specific Embodiment approach 1

[0033] Specific implementation mode 1: This implementation mode provides a fuzzy servo control system for the identification of insulating ceramic coating-metal EDM materials, such as figure 1 As shown, the system includes an average voltage detection module, a pulse power supply parameter self-adjustment module, a PMAC controller, a metal floating comparison threshold adjustment module, a ceramic floating comparison threshold adjustment module, a metal fuzzy controller, a ceramic fuzzy controller, and material type identification Device, seven-threshold comparison based on pulse width detection and breakdown delay joint identification discharge state detection device and execution module, wherein:

[0034] The average voltage detection module is used to realize the real-time detection of the average voltage of the discharge gap;

[0035] The pulse power supply parameter self-adjustment module is used to identify the sign M according to the material type c Realize the convers...

specific Embodiment approach 2

[0059] Specific implementation mode 2: This implementation mode provides a fuzzy servo control method for identifying insulating ceramic coating-metal EDM materials, and the method includes the following steps:

[0060] Step 1. The discharge state detection method based on the seven-threshold comparison of pulse width detection and the joint identification of breakdown delay is used to identify the gap discharge state during the processing of insulating ceramic-metal materials.

[0061] In this step, the voltage and current change information of the discharge gap is collected through the gap voltage sampling circuit and the gap current sampling circuit, and through the main control module of the pulse power supply based on CPLD or FPGA, it is judged whether there is a breakdown delay in the current discharge state, based on the discharge gap Medium voltage and current change information, through the joint logic operation of breakdown delay and threshold value comparison, identi...

specific Embodiment approach 3

[0111] Specific implementation mode three: as Figure 5 As shown, the specific implementation steps of the fuzzy servo control program based on the material type provided by this embodiment are as follows:

[0112] During processing, the control system initializes variables such as the servo reference voltage and the initial material type flag to ensure the stable operation of the system. After the main variables are initialized, the current gap discharge state is detected, and the time of each discharge state is counted. When the statistical period is reached, the relative rate of spark discharge between ceramics and metals within the statistical period is calculated, the current material type is distinguished according to the material judgment basis, and the optimal processing parameters are self-adjusted. The ceramic fuzzy controller and the metal fuzzy controller are respectively based on the ceramic open-circuit rate in the statistical period and low resistance spark dis...

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Abstract

The invention discloses a fuzzy servo control system and method for material identification of insulating ceramic coating-metal electric spark machining. The fuzzy servo control system involves an average voltage detection module, a pulse power supply parameter self-adjusting module, a PMAC controller, a metal floating comparison threshold value adjusting module, a ceramic floating comparison threshold value adjusting module, a metal fuzzy controller, a ceramic fuzzy controller, a material type identifier, a seven-threshold comparison and breakdown delay combined discharge state identificationdetection device based on pulse width detection and an execution module. According to the system and the method, a material type can be identified in the processing process, and a floating comparisonthreshold value of an insulating ceramic coating or metal can be adjusted on line according to the material type, so that the effective adjustment of discharge gaps of the ceramic coating and the metal is realized, and the electric spark machining efficiency and quality of the insulating ceramic coating-metal material are improved.

Description

technical field [0001] The invention belongs to the technical field of electric discharge machining, and relates to a fuzzy servo control system and method for identifying insulating ceramic coating-metal electric discharge machining materials. Background technique [0002] Insulating ceramic coating-metal material has excellent thermal shock resistance, and this material has been widely used in the aerospace field. Since the surface layer of the ceramic coating-metal multilayer structure material is a brittle insulating ceramic coating, the bottom layer is a high-temperature high-temperature alloy or titanium alloy with high hardness and high melting point, and the thermal physical and mechanical properties of the ceramic coating and metal are significantly different. It is difficult to achieve high-efficiency and high-quality processing by mechanical processing methods. How to realize the processing of ceramic coating-metal multilayer structure materials has become a hot a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23H1/02B23H9/00
CPCB23H1/02B23H9/00
Inventor 郭永丰王力杜云龙张国伟张延勇刘洋冯业瑞
Owner HARBIN INST OF TECH
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