What is cold shrinking?

Cold shrinking is a metalworking process in which a metal sheet is deformed by applying pressure while cold, causing it to shrink. To achieve cold shrinking, the metal sheet is typically clamped onto a form or stake and then struck with a shrinking hammer. The process causes the metal to stretch in one direction while contracting in the opposite direction, leading to a smaller, more concave shape.

Cold shrinking is often used to repair dents in car bodies or other metal objects, as it can be used to reshape the metal without removing it. It is also used in metalworking to create curved or angled shapes in metal sheets.

The process is often used in conjunction with other metalworking techniques, such as planishing or stretching, to achieve the desired shape and smoothness. It requires skill and experience to perform effectively and is typically carried out by professional metalworkers or auto body repair technicians.