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Self-learning filter lifetime estimation method

A technology of filter and life, which is applied in the field of self-learning filter life estimation, and can solve problems such as filter rupture

Active Publication Date: 2018-10-09
AGIE CHARMILLES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the maximum allowable filter pressure is exceeded, the filter may rupture, or may not deliver enough clean dielectric at its output

Method used

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  • Self-learning filter lifetime estimation method
  • Self-learning filter lifetime estimation method
  • Self-learning filter lifetime estimation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0083] The EDM machine needs to provide a sufficient amount of conditioned dielectric fluid dielectric units to implement the EDM process. The important function of the dielectric unit is the filtration of the dielectric fluid.

[0084] figure 1 A block diagram showing a typical wire EDM machine (wire EDM). The wire EDM machine includes a dielectric unit with a dirty dielectric tank 10 for collecting used dielectric fluid, a clean dielectric tank 1 for collecting conditioned dielectric fluid, and a filter circuit. The pump 3 is used to fill the working tank 8 and maintain the desired dielectric level in the working tank. In this representation, pumps 2 and 4 are used to deliver the dielectric fluid to the upper and lower nozzles at high pressure. In fact (not shown), there may be a high pressure pump controlled by a frequency converter and then a valve for controlling the dielectric fluid delivered to the upper and lower nozzles to flush the machining gap. Use CNC, axis contro...

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Abstract

The present invention provides a method for the determination of lifetime of a filter of an electric discharge machine the electrical discharge machine in consideration of a maximum allowable filter pressure, wherein the time measuring unit counts the machining time ts during which an electric discharge machining process is running, a filter pressure sensor measures the filter pressure p(k), preferably with a predetermined sampling interval, the pressure measurement p(k) and the respective sampling time t(k) are stored, and the sampled measurements p(k) and the respective sampling times t(k) are used to determine the parameters of an exponential function which best fits to the plurality of sampled measurements regression analysis. The determined parameters include the filter lifetime tf, which serves to determine the residual time to the filter replacement tr and / or the calendar deadline of filter expiration.

Description

Technical field [0001] The present invention generally relates to a method for determining the time during which an EDM machine can be operated before replacing a dielectric filter. Background technique [0002] In EDM machines (EDM: Electric Discharge Machining), dielectric fluids are used to cool, insulate, ionize and clean gaps. The EDM process produces small particles of the removed material. These fragments are circulated away from the working tank by the dielectric fluid and are collected in the dielectric unit of the EDM machine. The dielectric unit includes a filter circuit to provide a clean dielectric fluid to the working tank and to the flushing nozzle. Generally, the filter circuit of an EDM machine includes one or more filter elements. The filter has a scale of 1 to 25 microns, usually 3 to 1 microns. The overall filter life is in the range of hundreds of machining hours. As long as time passes, the initial air filter element (not containing debris) retains more ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
CPCG01N15/08G01N2015/084B23H1/10B23H7/20B01D29/606B01D35/143B23H7/02B23H7/36G01N15/0806
Inventor F.贾克斯R.佩雷兹B.拉瓦蔡斯T.S.托斯奥
Owner AGIE CHARMILLES
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