Sort of like that... LOL.
I make my own templates of several designs from hardboard. Easy. My originals were copies of our shop's templates. But I was taught to make my own as part of my apprenticeship. (Years ago...)
Arched cabinet door templates (De-Mystified)
Step #1:
First off is to figure out your math.
A normal raised panel door is 1/2" larger than the opening, all the way around. So a door width is the opening width plus 1". The door height is opening height plus 1". So in this example, it is going to be 17.5" wide and 34" high. (An inset door in a skeleton frame is 3/16" to 1/4" less wide and high than the opening, depending on the wood.)
- How wide is your stiles? We'll say 2.25"
- How deep is the groove that the door will fit into? We'll say 3/8"
- You need 1/8" extra for expansion for most woods.
- Your rail length is going to be : <rail length> = <door width> - 2( <stile width> ) + 2( <tooling depth> ) + <expansion factor> = 17.5 - 2(2.25) + 0.75 + 0.125=13.625"... But you are going to be working with templates that have to "attach" with screws so add another 1/2" to each side (1" total), to attach... (The top rail gets trimmed to length after the rail profile is cut.) So 14.625"
-- Decide on your design... Say with a 3" standoff on each side. This makes the radius as <arch radius> = <rail width> - 2( <standoff> ) - <arch adjustment factor> = 14.624 - 2(3) - 1 = 9.625... NOTE: The arch radius is arbitrary. Sometimes the design looks better if the twice the radius is "larger" than the width. That adjustment makes the rail less wide at the ends, which if not, it sometimes looks "bulky" or "too much" to some customers. The rail width at the top of the arch is equal to your bottom rail width. On the otherside of that, where the design is continued beyond a single door, it again adjusted to visually...
Step #2:
- Cut a sheet of paper to that width, 14.125". Fold it in half.
- Draw it out (half).
- Cut it out. Unfold the paper.
- Transfer it to a template blank 14.125" wide. Mark where the center was.
- Cut that out with a band saw (or other methods).
- Sand it smooth.
--- That is your arched rail template.
Step #3:
- Transfer the design again to a 13.125" template blank. Mark where the center was. This one does not have to be 1" larger in width, as on the panels, the screws are 1/4" in so will be inside (hidden in) the grooves.
- Add your groove depth to the 1/2 the expansion standoff, which is 3/8" + 1/16" = 7/16"...
- Measure along the outside of the arch curve another 7/16" and draw your new arch on that fresh template blank.
- Cut out with a band saw (or other method).
- Sand the contour smooth...
--- This is you arched panel template.
You get the idea. They are not that hard to make. Soon you'll have you own collection of different designs. Two other popular is to have the arch across from the inside of the rail to rail (full radius) or... Half the radius in one door, continuing the other half of the radius into the next door... Antoehr variation is instead of having a straight standoff before the arch, that is has a smaller opposing radius from the ends of the arch to each stile.
EDIT--
Using that same technique, you can create templates for any shaped panel (an amoeba shaped blob for example) and for it corresponding it's rails and stiles...
