IT1072714B - Marking the position of flaws in hot billets - with marking powder ejected by pneumatic gun (NL 12.9.77)
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Marking the position of flaws in hot billets - with marking powder ejected by pneumatic gun (NL 12.9.77)
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Publication number
IT1072714B
IT1072714BIT6767277AIT6767277AIT1072714BIT 1072714 BIT1072714 BIT 1072714BIT 6767277 AIT6767277 AIT 6767277AIT 6767277 AIT6767277 AIT 6767277AIT 1072714 BIT1072714 BIT 1072714B
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Application filed by Hoogovens Ijmuiden BvfiledCriticalHoogovens Ijmuiden Bv
Priority to IT6767277ApriorityCriticalpatent/IT1072714B/en
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Publication of IT1072714BpublicationCriticalpatent/IT1072714B/en
Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves
(AREA)
Abstract
The roller conveyor delivers the hot billets to shearing blades. An ultra-sonic flaw detector emits a signal when an internal flaw is detected in the billet. This signal actuates a marking device by supplying compressed air to a cylinder. The movement of the piston rod opens a powder container so that a small amount of powder is ejected through a V-shaped slot in the marking head. The coloured heat-resisting powder marks the position of the flaw with a letter V. The operator operates a shear blade so that the defective portion of the billet is cropped off.
IT6767277A1977-03-281977-03-28Marking the position of flaws in hot billets - with marking powder ejected by pneumatic gun (NL 12.9.77)
IT1072714B
(en)