Çelik Makina Sanayi ve Ticaret AÅž, a Turkish steel producer has awarded Siemens Metals Technologies an order to modernize its bar rolling mill in Bursa. The rolling mill will be equipped with a new reversing sliding roughing stand and a new intermediate train.

The existing finishing mill will also be brought up to the state of the art. The new equipment will enable ÇemtaÅŸ to further improve its product quality, especially in respect of mechanical properties, metallurgical structure and the surface quality of the rolled bars. The plant will have a new automation system, including process models and mechatronic packages.

This will give the bar rolling mill an end-to-end automation solution, which will increase productivity and reduce downtimes for maintenance. The modernized rolling mill is scheduled to come into operation at the beginning of 2015.

ÇemtaÅŸ is the second largest producer of alloyed bar steels in Turkey, and supplies the European automotive industry. It exports around 70% of its products. The company has its own steel production and rolling capacities at the Bursa location.

It produces structural, case hardened, heat treatable and spring steels, as well as micro alloyed grades, stainless steel, free cutting and boron steels. After completion of modernization, the rolling mill will produce bars with diameters ranging from 15 to 80 millimeters, and can be converted to handle diameters up to 120 millimeters if required.

It will also be able to produce flat bars with thicknesses ranging from 5.5 to Siemens AG Wittelsbacherplatz 2, 80333 Munich, Germany Communications and Government Affairs Head: Stephan Heimbach Industry Sector Metals Technologies Business Unit Turmstr. 44, 4031 Linz, Austria 62 millimeters and widths from 46 to 140 millimeters.

For the bar rolling mill, Siemens will supply a reversing sliding roughing stand which will be able to roll billets up to a size of 200 millimeters. This will allow a higher reduction ratio, resulting in better mechanical properties and an optimized metallurgical structure.

During the reversing roll pass sequence, between two subsequent passes, the stand will hydraulically slide along the cross direction with respect to the rolling axis, so to present the appropriate groove for each subsequent pass, while at the same time maintaining a fixed rolling axis. The sliding movement is fully controlled by the automation. The rolling stock will be rotated by bar guidance equipment and special manipulators at the entry and exit ends of the stand. The roll gap will be adjusted electrically.