Do you know, that… ?

In pulling the profiles of the boundary surface or (It refers to solids and surfaces) often we define the ends of the appropriate type of alignment. This is particularly important in the design of molded parts or castings, where they required inclination to facilitate removal of the workpiece from the mold.

There are many ways determine the angles of the initial, However, I would like to draw attention to one important detail. If we have two sketches, having contacts at the same time and the angles they are defined within the sketch, This may occur during the draw “conflict”. Just the angle resulting from a sketch is different than the angle set in operation.

It manifests itself longitudinal deformation (striations), which will be the greater, the larger the angle of operation. If this angle was zero, such effect would not be seen. Also, if the profiles there was a fairly large gap, adverse effect would be smaller and would not have it at all. The following example relates to a solid modeling.

In the case of surface, where as we know it is not thick, easier to eliminate this distortion. But this does not mean, that they will not be. In the case of the same sketch as above, But pulling the same outer contours – distortion accumulates in the top of. This is because, that has an angle sketch 25° while the program forces the inclination 3°, what excludes. In effect, radial distortion created diverging from the top.

The program should indicate the message is disturbed contact, However, according to my observations, the message does not always appear.

Another example is the drawn boundary surface, where in addition to one of the curves is a guide curve (direction 2). In the properties of operations defined to contact the wall at the end and the beginning of the curve while using the, which is half of the ellipse. Auxiliary surfaces are inclined at an angle 2° (which detects program), a partial ellipse is cut in half. That is, the split does not have any angle – this applies to both ends of the. This angle only increases, However, at the beginning it is not, which again is a conflict.

A common situation is also preparing inaccurate model. ie. we define contact, and the program in the field of displays for any such fractions. 0,004712°. This model also needs to be improved, because even if you manage to confirm the operation, the smoothness of the border will not be perfect.