Description

highly versatile cold forming process, the fundamentals of thread rolling can be done on any type of ductile metal to harden, strengthen, or change the material’s physical properties in other ways.

Tread rolling makes use of hardened steel cylindrical dies to shape materials; the dies, imprinted with the thread profile, penetrate the work metal at ultra-high pressures in order to displace and mold it into a mirror-image thread. Unlike traditional cutting and grinding methods, no metal is lost or cut away during the thread rolling process; it is simply reshaped.

The Benefits of Thread Rolling

The fastest, most economical method for producing highly accurate threads, thread rolling allows for higher repeatability, stronger threads, and better finish quality and mechanical properties than grinding, cutting, or chasing.

Rolling stock has a smaller diameter than full-sized cutting stock, so no material is left over after the process, limiting waste and shortening cleanup times. Plus, because high quantities can be produced per roll, tooling costs per thread are much lower than those of other manufacturing methods; rolled surface feeds per minute are up to 10 times faster than cutting, resulting in reduced labor requirements as well as lower costs. Not only does this benefit manufacturers’ bottom lines, it also allows for faster lead times for clients.

Thread rolling improves metal tensile strength by 30% or more compared to traditional cutting methods, and, due to the hardening phenomenon the material undergoes during the rolling process, increases fatigue strength by 50-75%. The geometry of the roller dies allows for a highly accurate thread form, and the intense pressure applied allows for a much smoother surface than those of cut threads. An inherently fast process, thread rolling is generally the fastest segment in your production cycle.

Simple yet highly efficient, thread rolling is ideal for industries requiring high-tensile, safety-critical components such as the aerospace sector; many fields, in fact, mandate the use of thread rolling to ensure optimal part performance and longevity.

Below are some key considerations to keep in mind before beginning any thread rolling project.

Material Selection

When determining the best material for a specific application, a few key factors should be kept in mind; working with the correct material will ensure the overall success of the rolling process.

The softer the material, the easier it is to roll threads; harder materials, on the other hand, result in a shorter die life. The faster the machining speeds and feeds, the lower the quality of the finish.

FETTE© Repair Center

We offer a thread rolling repair service. The thread rolls will be assessed by our service centre, and we will provide a report and quotation on the repair required and the process before proceeding with the repair.