to bend iron
錈 centers on bending metal, specifically iron, into a desired shape.
錈 combines 金 (metal) with 卷, which likely contributes the sound and the idea of bending or curling, together suggesting the bending of metal.
The left side 金 is metal, and the right side 卷 looks like something rolled or curled. Picture a blacksmith bending a hot iron bar into a curled shape.
For ケン, imagine a blacksmith named Ken bending iron: Ken -> ケン, and he bends the metal with his hammer.