Surface World May 2018 Surface World May 2018 - Page 70

Upon arrival of the components at the line entrance, the control system automatically determines if the components must be cleaned, shot blasted, levelled, with which colour they must be painted, or if they must only undergo a partial process. For every finished component all process parameters are reported back to the production control system allowing for complete and precise documentation. The acquisition of the shipyard in Turku in 2014 was a strategically important milestone for the Meyer family. It coincided with substantial investments in state-of-the-art equipment for the production of cruise ships. These included a preservation line with levelling stations for bulb flat steel, straight flat steel profiles and steel plates, all designed and built by Rösler. A key factor in the customer’s decision to go with the Rösler concept was the high productivity and reliability of the preservation line Rösler had supplied to ND Coatings, the strategic partner of the Meyer Werft shipyard in Papenburg for corrosion protection, insulation and surface treatment. This is one of the most modern and eco-friendly preservation lines in the world! The 225 meter (740 feet) long shot blast and levelling preservation line was completely custom engineered to the needs of Meyer Turku and consists of an inter-linked component transport system, pre-heaters, two independent shot blast machines, suitable levelling systems for beams and plates and a paint station with dryer. All system components are linked with each other and integrated into the production control system of the shipyard. 68 The steel profiles, which are stored outdoors, are covered with rust or scale from the roll forming process. Depending on the season, they may also be covered with snow and ice. Seven components are combined into a single batch on the transport system and are passed through the cleaning station/ pre-heater for de-icing – if required - at a speed of 3 m (10 feet) per minute. In a subsequent stage the components undergo a blast cleaning process in a roller conveyor shot blasting machine, type RRB 16/5. Four Gamma 400 G turbines with a drive power of 15 kW each ensure optimum blasting results. They are mounted on the roof and bottom of the blast chamber made from manganese steel. Easy to replace, overlapping manganese steel liners provide additional protection against premature wear. After travelling through a blast media brush and blow-off station the profiles are aligned in single file for passing through the subsequent levelling system at a speed of 30 m (100 feet) per minute. Faulty profiles are immediately discharged from the system. The profiles within spec. are combined into batches in the subsequent batching station with batch widths of up to 3,200 mm (126”). The steel plates, stored in a roof-covered outdoor area, can be up to 100 mm (4”) thick, 3,300 mm (130”) wide and 24,000 mm (945”) long. They are picked up by a magnetic portal crane and placed in a centred position on the load station of the roller conveyor, the so-called main transport line. A sensor monitors the entire loading process. In the first stage the steel plates are passed through a blow-off station for the removal of water and other debris followed by a pre-heating step. From there they enter the RRB 35/6-HD roller conveyor shot blast machine at an average speed of 5 m (16 feet) \Z[]KH\XX[H\\]Z\Y]ZY  BY\ܛX[H\[\\H][[[XH ][[[Y]H\و XX Z[[Z\HHX\]B[X[]]HXZ[[[KH\[X\XX]YHX[[\HY[ \[Y]ݙ\\[X\H\XBX[[\HY[]\ˈY\H[[ݘ[ق\YX[\YYXH[H\[[ٙ][ۈH\ۙ[[\H][[œ\˂[܈H[[[و\Y]\وٚ[\۝HXZ[[ܝ[H܈Z[[HY[و]Y[]\]]X]X[K\ۈ\B[\Y]وٚ[\\[[K\H]\\H\YYB\[\][ۜ][\Z][Hٚ[\HKZX]Y[[\[BXۙ\H\\˂HZ[\]H[وH[HZ\œXH][ X\Y X\ۙ[Z[\\[\X\H]]X]X[B[[[HZ^Y\\]Z\Y HZ[\˜\YY]^H[HXݙH[[H\ۙ[ˈZ[[Z\Bݙ\^KH^H[\H۝YBH\ۙ[Xۚ][ۈ[\X[Y[YX\\[\[KH[\Y܂[[[X[[\ۙ][ۙY[Xݙ\Y[H\[[[[HXݙ\H[XX[وN HوBX]\X[ HY\\\YۙY[\H\[[][H\[وHZ[ ]\\]Z\Y]\\\[X\[][ۈޞ\˜]H[HوHX[[H\\H]\[ٚ[\\BYY]\[\[Y][ۜ܂ۜX[HX[YX\[\][ۜ\œ\ܚXYHHX[ۈ۝\[K