Making Repads Using Offset Surfaces
PVE-7253, Last Updated Nov 27 2015, By: Cameron Moore, Jordan Winger and Laurence Brundrett
Here is another repad modelling method, this one for more difficult designs where the two methods presented below will not work. The repad can be built onto complex surfaces. Developed by Jordan Winger of Hawk Ridge Systems, shown here with a few minor changes.
The finished product – a branch connection covering a swept feature with more than one radius, welds are not shown.
The start of the development: A flanged and dished head has a straight flange, a knuckle radius and crown radius. Normally when swept 3 different surfaces are created. These 3 surfaces lines are combined to create 1 fit spline.
This is important – once revolved, the fit spline creates a solid head with only one outer and one inner surface. This allows the repad to extend beyond the limit of the crown onto the knuckle and if required onto the shell as well.
A nozzle is extruded onto the head, it is not merged. No hole is cut yet.
A circle radius of the desired repad size provides the profile, and the end of the nozzle provides the path for a sweep. The radius of the profile provides a distance to the limit of the repad, not the true developed width of the repad which is larger due to the curvature.
The top surface of the head is duplicated.
A line at the intersection of the swept shape and the duplicated top surface defines the limits of the repad.
The duplicated top surface is trimmed to the intersection line.
Thicknened…
…inside cut and combined for the finish!