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When making screw threads on a flat die thread rolling machine, a rolled part may get caught on the movable die and be pulled back into the roll die gap. These so-called roll-backs can cause considerable damage to the tools or even destroy the tools, tool holders, part-feed rails, pusher blades or other parts.

The monitoring systems of schwer + kopka for thread rolling machines can be equipped with a roll-back monitoring channel which immediately shuts off the machine when roll-backs occur. A separate monitoring channel checks whether the return stroke of the machine ram shows an increase in signal on the rolling force sensor. If a force pulse is registered here, the monitoring system switches off the machine directly with an emergency stop command to prevent further damage.

Benefits:

• overload protection for tools and machine
• reduces tool costs
• avoids expensive machine repairs
• reduces machine downtime