INGOT, Thickness Measurement

Many aluminum ingot processors do not have a suitable method of on-line quality control detecting surface flaws. Improvements need to be made to achieve more accurate measurement in a variety of situations. Using calipers is slow, and cannot cover a large surface area of the ingot. Yields can be increased substantially by planing the ingot to the correct thickness. Planing too heavily results in lost production. Plane too light and surface pits can turn out to be large flaws after the product has been rolled down to a very thin sheet, requiring a full stop in the production line.

Using an array of up to 40 SPR-02 Single Point Sensors, measuring thickness profiles on-line with complete accuracy, in front of the planer, will determine the thinnest point on the ingot. The information is then fed to the control system, and into the operators booth, delivering an instantaneous picture of variations in thickness of the slab. The planer is then set to the minimum thickness of the ingot, and the absolute minimum amount of aluminum is removed.

SPR-02 sensors used as laser micrometers, deliver instantaneous and continuous information, as well as compile information on shifts, allowing supervisors more time to focus on other areas. Higher recovery rates can be achieved, delivering increased efficiency and increased profits. Down time, due to inconsistent product, further down the production line is also reduced or eliminated.

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