Automated change of chuck jaws around the clock

SCHUNK has expanded the application range of its SCHUNK PRONTO retrofittable jaw quick-change system: As an alternative to rapid manual jaw change, the system can now also be operated autonomously. For this purpose, the required clamping inserts can be stored, for instance, on SCHUNK VERO-S base plates from where they can be loaded into the lathe chuck automatically by a robot. The locking and unlocking take place with a special Allen key that is also operated by the robot.

The SCHUNK PRONTO quick-change system can be used manually or automatically.

The SCHUNK PRONTO quick-change system can be used manually or automatically.

SCHUNK PRONTO can be retrofitted on all fine serrated lathe chucks and quick-change chucks in the sizes 200, 250, and 315, regardless of the manufacturer, and shortens set-up  time by up to 95%. The system consists of special supporting jaws that can be combined with different quick-change inserts. These inserts allow expansion of the clamping diameter by up to 55 mm for soft jaws and by up to 45 mm for claw jaws, without having to move the base jaw.

Compatible with all lathe chucks, regardless of the manufacturer

SCHUNK PRONTO supporting jaws are available in two versions: one with fine serration (1/16’’ x 90° or 1.5 mm x 60°) for set-up time optimization of conventional lathe chucks; the other with straight or helical serration for fully automated jaw change in combination with modern quick-change chucks. The system is suitable for clamping both unfinished and finished parts. Different supporting jaw variants are available for small, medium, and large clamping areas, depending on the particular application. As top jaws the innovative family- owned company offers hard claw inserts for different diameters and clamping ranges as well as three soft interchangeable inserts for finished part machining. Once they have been bored out, the latter can be reused again and again on the system. All interchangeable inserts are compatible with all supporting jaws. The clamping depth is variable with the workpiece bolt. In the version with straight and helical serrated base jaws, bar clamping is also possible.

In fully automated operation the clamping inserts can be stored, for instance, on SCHUNK VERO-S base plates from where they can be loaded into the lathe chuck automatically by a robot.

In fully automated operation the clamping inserts can be stored, for instance, on SCHUNK VERO-S base plates from where they can be loaded into the lathe chuck automatically by a robot.

All that is necessary for fast jaw change is to loosen the interchangeable insert with an Allen key, remove the insert, and replace it with another one. This can take place manually or automatically by robot. The repeat accuracy is an outstanding 0.02 mm. The risk of incorrect positioning via the serration is eliminated. In locked state, six-sided form-fit clamping ensures maximum process stability and enables high force and torque transfer. With the Excel-based SCHUNK PRONTO configurator, which is available at no cost, selecting and positioning the supporting jaw and interchangeable inserts is child’s play. After entering the chuck type and the workpiece diameter, the tool automatically determines the necessary interchangeable inserts and the correct position of the supporting jaws.

Source Schunk

More information

Visit the official Schunk website.