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Systems and methods for controlling a vacuum arc remelting furnace based on power input

A vacuum arc remelting and vacuum arc technology, applied in electric furnace heating, furnace control devices, furnaces, etc., can solve the problems of difficult speed control of punch parts and inaccurate control of arc gap.

Active Publication Date: 2021-09-21
A FINKI & SONS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, during a VAR process where the resulting ingot is expected to have a large diameter (e.g., greater than 750 mm), since more and more metal needs to be melted for the same change in arc gap as the electrode diameter increases, the punch speed Control can be difficult and / or controlling the speed can lead to inaccurate control of the arc gap

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  • Systems and methods for controlling a vacuum arc remelting furnace based on power input
  • Systems and methods for controlling a vacuum arc remelting furnace based on power input
  • Systems and methods for controlling a vacuum arc remelting furnace based on power input

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Embodiment Construction

[0016] With reference to the accompanying drawings, and specific reference to figure 1 , figure 1 An exemplary vacuum arc remelting (VAR) furnace 10 is schematically shown. The VAR furnace 10 may be configured to remelt metal by melting an electrode 12 composed of the metal within a melting chamber 14 of the VAR furnace 10 . Within melting chamber 14 , electrode 12 may be positioned within crucible 16 . In some examples, crucible 16 may be formed of copper, as copper may provide desirable thermal properties and / or electrical conductivity; however, crucible 16 is of course not limited to being formed of copper, but may be formed of copper that provides desirable thermal properties and / or electrical conductivity for the VAR process. Conductive any material formed.

[0017] In some examples, crucible 16 may be cooled by, for example, cooling system 20 . Cooling system 20 may, for example, include a coolant source 22 that delivers coolant fluid into crucible 16 through one or ...

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Abstract

A control system for a vacuum arc remelting (VAR) process of metal includes a direct current (DC) power supply, a punch driver, a voltage trickle short sensor, and a controller including a processor. The trickle short sensor may be configured to measure the trickle short frequency of the arc over a period of time. The controller is configured to determine a real-time arc gap length between the electrode tip and the weld pool based on a correlation between the trickle short circuit frequency and the arc gap length. The controller is also configured to control power input to the electrode from the DC power source based on the real-time arc gap length by determining an input power level to the electrode configured to produce a desired arc gap length at the input power level by the DC power source.

Description

technical field [0001] The present disclosure relates generally to vacuum arc remelting and, more particularly, to control systems for use in vacuum arc remelting processes. Background technique [0002] The vacuum arc remelting (VAR) process is commonly used as a secondary melting process to produce metal ingots. By employing the VAR process on metal ingots, the resulting ingots produced in the VAR process may have improved chemical and / or mechanical uniformity, which is highly desirable for metals used in demanding industrial applications. Additionally, the use of a VAR process may allow for better control over the microstructural characteristics of the ingot metal since the metal solidification time may be shortened during the VAR process. Exemplary metals that are commonly remelted by the VAR process may include, but are not limited to, nickel, titanium, steel, and any alloys derived from these or other metals. [0003] The VAR process may use a VAR furnace that uses d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B9/20
CPCF27D11/10C22B9/20F27B3/085F27D19/00F27D2019/0037F27D7/06F27D9/00F27D2007/066F27D2009/0018F27D2009/0067F27D2019/0034Y02P10/25F27B2014/045F27B2014/068C22B9/22H05B7/07H05B7/109H05B7/156H05B7/20
Inventor 阿尔吉达斯·恩德斯
Owner A FINKI & SONS