Plate Jigs

This module generates curved jigs which, when placed on the workshop floor, provide the necessary curved space surface, to which the curved shell plates will fit. The jigs are calculated so that they will be vertically located on the floor, and so that the panel will be as horizontal as possible or placed according to the definition of the assembly plane via input.

Overview

Each jig row is named by adding a minus sign and a letter to the name of the panel, starting with A at the aft or bottom side of the panel. Each jig is named by adding a digit to the jig row name, starting with 1 at the bottom or stem side of the panel.

Each jig is calculated according to the Side view of plate jig image. One is placed under each seam or butt apart from the first and last. The breadths of the jigs are given in the figure. The height of a jig is defined by the assembly plane and the contour of the panel, unless the height B or C or both are more than 1500 mm. In those cases the jig is cut off as sketched in the rightmost jig, where the vertical edges are 700 mm.

Side view of plate jig

In each jig there is a circular cutout for the seam or the butt. The default radius is 75 mm and the central point lies on the seam or the butt. However, the radius may be changed by means of the IP CUTOUTRADIUS. Vertically below the seam or the butt there is a triangular mark for correct placing of the shell plates.

Circular cutout for seam

The jigs are stored with their local origins of coordinates oriented as in the figure.

The calculated jigs are stored on SB_PLDB. For fabrication of the jigs this program prints a list of the jig heights, see example in Listing of Manufacturing Curved Plates.

For the jig placing on the workshop floor the module prints the necessary coordinates and distances. It also produces a drafting for this purpose, see example in Manufacturing Curved Plates Drawings.

For the shell plate placing another list is produced. This information is also stored in the attribute 206 (JIG) in the plate object.

The transformation vector giving the orientation of the assembly plane in the xyz-system will be stored in the attribute 207 in the plate object.