Assembly Parts

The assembly parts are the parts that would result if only the assembly seams (see above) had been available in the panel. Their names are formed in the following way:

<assembly_part_name> ::= <panel_name>-<assembly_name>

Example:

An assembly part with assembly name U2B derived from panel AB123-4 will get the name AB123-4-U2B.

Assembly parts will be stored in the plate data bank together with normal piece parts.

A symmetric panel may contain the model information for two sets of assembly parts, one on port and one on starboard side. Both these assembly parts will be generated provided their names are available in the Assembly Name file.

The following types of information will be available in an assembly part:

1. The outer geometry of the assembly part with information about excess and bevelling, including continuously varying bevel angles.

   Excess defined according to EXC_TYPE_3 (cf. above) will be removed from the assembly parts.

   Bevel information is taken away from edges with remaining excess (that means, where modification of the edge geometry are supposed to take place in later assembly stages).

   An assembly part is welded together from several piece parts which may have different thicknesses. Thus the bevel type may change along an edge, for example, when passing into a piece part with thicker plate. The bevel type is normally associated with a gap. Thus the gap might change along an edge, creating small "steps" in the geometry of the edge. However, these are not acceptable when cutting the edges (with bevels) in the panel line. Therefore, PPANPARTS in a situation as described above replaces all gaps with the smallest gap along the current edge, see the figure below which shows a very much magnified view of an edge in the transition from one thickness (and bevel type) to another.

   

   Figure 1:2. Figure showing a very much magnified view of an edge in the transition from one thickness (and bevel type) to another.

2. Information about holes and marking traces are derived in a similar way as for ordinary piece part cutting.

3. Those stiffeners on the assembly part which have the assembly common with the assembly part (supposed to be the parallel stiffeners mounted in station 4 of the panel line) will result in both a marking trace and a trace for sand blasting. The latter will be restricted to within a certain distance from the edges to prevent the blasting tool to be damaged. This is made with the IP MARKGAP in the program sf834d.

4. The inner (piece part) seams of the assembly parts are available as geometry (in order to be able to lock the height sensor when passing them).

5. Information about the piece parts is available as attribute information in the assembly part (extension, thickness).