APPARATUS FOR POSITIONING A HULL BLOCK

摘要

A block having three dimensional curves thereon is supported on a table by means of vertically extending struts which are adjustable to support the block and the plates forming the block in proper abutting relation of the plates in welding the abutting plates. The table is supported centrally on a universal joint so that the table may swing about either of two intersecting axes and to positively move the table so that any particular portion of the seam of the block is horizontal and this is accomplished by pushing and pulling devices which may be hydraulic cylinders reacting against a base and against the table with one push-pull device spaced from one axis and the other push-pull device spaced from the other axis so that the universal joint supporting the table is not in alignment with the push-pull devices. It is easier to weld a seam when the seam is horizontal and any portion of the hull block can be positioned by means of the push-pull devices to make any portion horizontal or such portion being welded and by proper manipulation of the push-pull devices the portion being welded can always be horizontal for a maximum welding efficiency.