Your challenge with a post-WWII POD is to make Danish companies a major producer of weapons sought all over the world, similar to Belgium or Germany.
Small arms, aircraft, tanks, doesn't matter what.
I can't really see it happen with such a late POD. Denmarks problem was that it had quite limited heavy industry. While we had a thriving arms industry it was never a powerhouse, mostly it was landmines, artillary and rifles.
But a suggestion could be no Marshall help, and the allies start the Morgenthau Plan, but give it up in the fifties with the growing strength of the Russians and DDR. So the allies decide to rebuild the German army, but with the German industry in ruin, they look to the neighbouring countries. Here because of lack of Marshall help most of the states are still rebuilding and they look to Denmark, which has suffered the least in the war and which has heavily militarised thanks to the fear of new invasions*. With the oney from the export to Germany are reinvested in continued weapon research.
*Denmark did something like in OTL, but because of the Marshall Help, Denmark dropped many of its heavy industries, because it could get cheaper products from USA. So weaponry was often imported rather than home produced.