Virkets formförändring och dess betydelse vid postning
The purpose of this thesis was to create a saw pattern program for the sawmill industry. I have chosen to focus on the module that describes the shrinking on the wood. There are several theories about how the wood deforms by shrinking. Several hypotheses were simulated in the program and after testing them I decided to use only one of them (hypothesis C).
The program is written in Visual Basic .NET and I choused that program language because it
is easy to do changes in the layout. Another great advantage in Visual .Net is that you can mix different languages in the same program. For example you can use one language for
calculating a motion and another one for the design.
With the program you can simulate the shrinking of a plank when it?s drying. The result is a picture of the plank with its new width and thickness.
The program has one disadvantage, which occurs when a plank is placed in the middle of the
log, the forces in the plank are then different and the hypothesis doesn?t work for those cases.
The final part of the work was to make a sketch of how a saw pattern model should look like with the shrinking module.