Mannesmann Aktiengesellschaft

Hannes Goldberg

Manfred Bellmann

The method of gaplessly separating and identifying successive rolling lots of ingots or blooms in a production process for making tubes or the like wherein the stock is introduced into a furnace for heating and in a production line subsequently rolled, which comprises radio-actively marking the first or the last ingot of a given rolling lot of ingots at its subsequently lost end prior to being introduced into the furnace. A further step includes interposing a radio-active radiation responsive signal device in said production line before rolling. Apparatus for carrying out said method includes a device for imparting radioactivity to an ingot in advance of a rotary hearth furnace. Radiation counter-tubes are located in advance of a taper mill and a continuous rolling mill respectively. Further counter-tubes are arranged in advance of a stretch reducing or sizing mill. A non-radioactive marking device is arranged in registry with the rolled stock and operatively coupled with said further counter-tubes and located downstream of the sizing mill.

Growing community of inventors

Mulheim, Germany

Hannes Goldberg