Unlock instant, AI-driven research and patent intelligence for your innovation.

Mitigate metal level overshoot or undershoot during flow rate demand transitions

A metal liquid level and flow rate technology, which is applied in the field of reducing the overshoot or undershoot of the metal liquid level when the flow rate demand changes, can solve the problems affecting the casting process and process control, etc.

Active Publication Date: 2020-04-28
NOVELIS INC
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such overshoot or undershoot may negatively affect process control, halt the casting (for example, due to detected liquid levels falling outside approved parameters) or otherwise negatively affect the casting process

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Mitigate metal level overshoot or undershoot during flow rate demand transitions
  • Mitigate metal level overshoot or undershoot during flow rate demand transitions
  • Mitigate metal level overshoot or undershoot during flow rate demand transitions

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0079] Example 1A (which may combine features of any of the other examples herein) is a method of conveying molten metal in a casting process, the method comprising: providing a mold apparatus comprising: a mold; a conduit, configured to deliver the molten metal to the mold, the conduit being controllably closed by a control pin; a positioner coupled to the control pin; a level sensor configured to sense the mold the liquid level of the molten metal in; and a controller coupled with the positioner and the liquid level sensor; providing an input to the controller in the form of a metal level setpoint, the molten metal The bit settings are changeable over time according to a casting recipe having at least a first stage having a first projected flow rate, a transition point, and a second stage, the first projected flow rate being the same as the first projected flow rate, and a second stage. The second predicted flow rates for the two phases are different, and wherein the transit...

example 2

[0080] Example 2A is the method of claim 1A (or any of the preceding or subsequent examples), wherein based on the first predicted flow rate for the first stage and the second predicted flow rate for the second stage The difference between predicted flow rates determining the alternative pin position value further comprises determining, by the controller, the first predicted flow rate for the first stage and the second predicted flow rate for the second stage and by modifying the first change pin position at or near the end of the first stage between the first predicted flow rate in the first stage and the desired flow rate in the second stage The alternative pin position value is determined based on the percentage difference determined between the second predicted flow rates.

example 3

[0081] Example 3A is the method of claim 1A (or any of the preceding or subsequent examples), wherein the first predicted flow rate of the first stage is greater than the second predicted flow rate of the second stage and wherein providing the alternative pin position value from the controller to the positioner for the first varying pin position at the transition point mitigates overshoot.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Automated methods and systems dynamically control the delivery rate of molten metal to a mold during a casting process. Such automated methods and systems may include: automatically controlling a flow control device, such as a control pin, during a first casting stage to regulate molten metal flow or flow rate; moving the flow control device with an alternate flow control device position determined based on a difference between a first predicted flow rate of the first stage and a second predicted flow rate of the second stage; and during the second stage Automatic control of the flow control device is resumed based on the sensed metal level and the metal level setpoint. Additionally or alternatively, overshoot and / or undershoot may be mitigated by translating the mold or changing the casting speed.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of U.S. Provisional Application No. 62 / 586,270, filed November 15, 2017, and U.S. Provisional Application No. 62 / 687,379, filed June 20, 2018, which are incorporated by reference in their entirety incorporated into this article. technical field [0003] The present application relates to an automated method and system for dynamically controlling the rate at which molten metal is delivered to a mold during a casting process. Background technique [0004] Control of the flow of metal into the mold is an important factor when producing ingots as in the aluminum casting process. For example, in extreme cases, excess metal flow could allow the mold to overflow or otherwise exceed proper boundaries and damage other equipment, while insufficient flow could allow the metal to cool and solidify before reaching the mold boundaries and cause the ingot to have poor Desirable shape or other ne...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/18B22D11/20
CPCB22D11/201B22D11/103B22D11/181B22D11/18
Inventor A.D.辛登J.R.B.麦卡伦R.B.沃斯塔夫
Owner NOVELIS INC