CALCULATORTurning with positive fit
The workpiece is stamped to produce a positive fit.
First of all, the workpiece is stamped in the stamping station. This positive fit now makes it possible to reliably clamp the workpiece with just a fraction of the previously necessary clamping force. Positive-fit clamping means that only minimum allowances need to be made for the clamping edge. In addition, the stopper tooth provides an absolutely precise reference point for re-inserting workpieces in the chuck with a high degree of repeat accuracy.
The force-fit turning you have known up to now …
Processing round workpieces in conventional force-fit procedures needs high clamping forces to achieve acceptable machining results.
Expensive collet chucks have to be used to achieve these high clamping forces. In addition, up to now materials were clamped with a material allowance of up to 25 mm. This often resulted in an unwanted deformation that then had to be corrected or eliminated in an elaborate procedure.
In addition, higher material allowances result in higher unit costs and in some cases make processing irrational. The high clamping forces expose the gripper jaws in particular to high wear.
Positive fit turning with InoGrip® by HWR …
InoGrip® uses the physical principle of the positive fit. Defined stamping produced by a holding and a stopper tooth makes the clamping jaw and the workpiece into one unit. The stopper tooth also provides an absolutely precise reference point.
Stamping is carried out separately in a stamping station with special stamping jaws and takes approx. 3-4 seconds. Work can continue on the lathe during the stamping process.
EXAMPLES
Far higher power transmission with low clamping pressures
The advantages are quite apparent: the positive fit makes power transmission far more effective. As a result, the workpiece is held with clearly reduced clamping force with far less deformation. Expensive clamping solutions such as special clamping jaws or pendulum jaws are no longer needed.
Costs are cut in many areas
Material wastage is minimised and unit costs are reduced to a minimum by optimising subsequent machining.
Thanks to the positive fit, it is now possible to remove the part while machining is in progress and then reposition it again precisely after measuring or heat treatment, for example. It is thus now also possible to change from the lathe to the milling machine without any problems.
Thanks to InoGrip® ...
- workpiece deformation is reduced
- higher true running precision is achieved
- subsequent steps can be omitted
- operation of the overall system is more stable
- vibrations in the part are reduced
- higher cutting speeds are achieved
- only one set of clamping jaws is needed for scrubbing and finishing
InoGrip® is a completely new clamping jaw that fixes the workpiece in the collet chuck with a holding tooth.
To this end, a defined stamping is applied to the workpiece, resulting in a positive fit between workpiece and clamping jaw with an extremely small clamping depth. This positive fit now makes it possible to clamp the piece with a fraction of the previously necessary clamping force. The workpiece goes through only minimum deformation, resulting in the highest levels of true running accuracy.
In addition, a guide tooth provides an absolutely precise reference point so that the workpiece can be inserted time and again with repetition accuracy of up to 0.005 mm.
Stamping can be carried out directly in the collect chuck or in a separate stamping station. Stamping is possible in all materials with strength values of up to 1,400 N/mm2.
The InoGrip® clamping system
InoGrip® is an extremely flexible, universal clamping system for machining round turned parts. The main element is the inogrip® clamping jaw. The clamping system consists of clamping cylinders, a manual collet chuck and a compact stamping station.
InoGrip® can be used for machining practically every workpiece in the first clamping phase, including thick-walled, solid and thin-walled deformation-sensitive parts for both scrubbing and finishing.
Possible uses
The existing system can be used with the InoGrip® clamping jaw for all deformation-sensitive turned parts.
If the clamping pressure cannot be reduced far enough, a manual collet chuck can be placed in the existing power chuck for quick and effective machining of deformation sensitive parts.
In view of the fact that InoGrip® manages with far less and more advantages clamping pressures than conventional clamping solutions, conventional cylinders with InoGrip® are not always necessary. They can be replaced by smaller cylinders. The compact stamping station is the ideal addition to every configuration.
