PRODUCT REVIEWS
Boldrini dishing press technology .
Trailer and railcar tank manufacturing
Tanks manufactured for road and rail transportation are designed to be the lightest possible to increase the payload . The direct consequence of this is the use of thinner and high-quality plates in carbon steel or stainless steel with high-tensile strength .
The production target is therefore to reduce to the minimum the ovality tolerance of the rolled shell and to ensure that the same roundness is then obtained in the heads spun on the flanging machine . It also aims to decrease manual fitting and ensure the repeatability of components .
An eye on productivity
“ To achieve these production objectives , it is important to invest in a tank manufacturing line which features CNC-controlled , four-roll plate rolls equipped with plate-handling and support systems which are fundamental accessories to increase productivity ,” commented Rino Boldrini of the Faccin Group . Faccin ’ s solution includes :
1 . Lateral supports with multiple joints , guiding the plate towards the central support , holding it up during the initial rolling step and leaving free the main overhead crane for other jobs inside the workshop .
Rino Boldrini of the Faccin Group .
2 . The cross central support prevents the re-closing of rolled ferrules under their own weight in addition to avoiding the plate-overlap during the second end pre-bending . It has two orthogonal controlled axes to bear the weight of poli-cylindrical ( double D ) oval , elliptical and cylindrical ferrules with high-diameter thickness ratios . The interpolation between the two axes to handle elliptical or poli-cylindrical ferrules is managed by the CNC system . The cross central ferrule support is an essential device to produce policylindrical ferrules in an automatic single step process .
3 . Modern feeding tables are designed to automate plate feeding . While on one side the machine is rolling , on the other side the feeding table is automatically placing the next metal sheet in the same position as the previous one , for immediate introduction and transportation , resulting in valuable time savings . This , said Faccin , is a smart solution for high volumes that is designed to ensure operator safety .
4 . CNC dishing press with automated manipulator .
5 . CNC flanging machine .
“ It is also essential to ensure the repeatability of the tank manufacturing line , and this is the reason why the Faccin Group developed CNC software that is designed for results . The success of the CNC is due to the complete redesign of the hydraulic circuit ( including the choice of its components ) and PLC software ready to receive the CNC input . We therefore implemented the use of highquality , market-standard technical solutions for hydraulic components and various designs to ensure that all axes of the machines can be operated simultaneously ,” continued Boldrini .