Eleanor remembered her grandfather’s mantra: “Any fool can bend metal. An artist pulls it.” She took a deep breath and signed the lease on a new 400-tonne hydraulic transfer press—a gleaming beast from Germany that cost more than her house.
They rebuilt the process from scratch. They introduced a multi-stage drawing cycle: first a shallow pre-draw, then an intermediate redraw, then a final ironing stage to thin and smooth the walls. They replaced standard mineral oil with a high-viscosity chlorinated extreme-pressure lubricant. They even adjusted the blank holder force dynamically using sensors—too little, and the metal wrinkled; too much, and it ruptured. deep drawn stamping uk
On the 43rd night, at 2:17 AM, the press cycled. The blank was fed, the punch descended, and the metal flowed. The press opened. A single, flawless battery housing emerged—mirror-smooth inside, uniform wall thickness of 1.8mm, with integrated mounting bosses formed in the same stroke. No welds. No leaks. Just strength. They introduced a multi-stage drawing cycle: first a