Double torsion springs handle car maker's needs

manufacturer William Hughes has invested in the latest CNC technology machines to fully automate its production process.

For many applications, double torsion springs perform better than single and as a result, they are widely used in the automotive industry. So when a manufacturer of seat and car interior parts needed a double torsion spring for the door handles of a popular small car, it approached William Hughes. Application engineers designed the spring to meet the exacting specification of the car manufacturer, while ensuring that the spring would be easy to manufacture using its CNC machinery.

The spring is used inside allthe car to return the handle to its normal position and is designed to make assembly into the car mechanism easy.

Despite the complex shape of the central section of the double torsion spring, very little tooling was required.

By making the spring in two fully automated stages, the difficult central section was easily formed to provide a spring that is compact, cost effective and durable. Springs are protected by anticorrosion paint containing zinc flake.