Broaching Tool Enables Single-Operation Serration on a Lathe

PMTS 2019: With Schwanog’s broaching tool, manufacturers of serrated turned parts can use a conventional lathe with C axis and eliminate the cleaning process.

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With Schwanog’s broaching tool, manufacturers of serrated turned parts can use a conventional lathe with C axis and eliminate the cleaning process that must usually come between turning and broaching. The broaching tool carries a quarter circle geometry with six teeth. Only the first tooth carries a complete (finish depth) profile, while the remaining five teeth are considered roughing teeth.

Broaching of serration is a two-step process. During the first step, the spindle does not move, and the broach feeds three times until the first tooth is completely established. During the second step, the spindle starts indexing and the five successive teeth are continuously broached until the finished depth is reached.

According to the company, the system saves on costs thanks to reductions in setup and part cycle times.