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User Report Mey & Andres - Roundness results improved

InoTop®-Hybrid clamping jaws from HWR avoid polygon formation in turning applications

In turning applications of deformation-sensitive workpieces Mey & Andres GmbH go for the new hybrid clamping jaw InoTop®. The toll manufacturer from Oyten was one of the first companies to test the innovative clamping system from HWR.

Mey & Andres GmbH are one of the biggest toll manufacturers in the Bremen region. Since 1984 the mid-sized company is specialised in the complex CNC-processing and jig manufacturing. In order to guarantee constantly high precision and quality in production there have been increasing investments in the previous years in the quality management and measuring technology. Like many other companies in the machining sector Mey & Andres have realised that in turning applications - especially in case of deformation-sensitive workpieces and materials - polygon formation can often occur. These out of roundnesses are usually caused by the clamping forces which have their impact on the workpiece when being clamped and centred. The InoTop® system which was developed by HWR Spanntechnik GmbH provides relief here.
No pressure from outside

The functional principle of the new InoTop® hybrid clamping jaw is based on an innovative clamping technology with a rigid counter bearing. The highlight: Through the special construction of the InoTop® clamping jaw the workpiece is centred from outside and compared to standard clamping systems it gets clamped from inside - thus polygon formation is avoided. The InoTop® hybrid clamping jaw is ideal for raw material clamping and can be adapted for any standard chuck. Retrofitting is easy and economical. Turning results can be achieved which before could only be achived by the utilisation of expensive special clapming solutions.
Result improved

Mey & Anders have tested the InoTop® hybrid clamping system on a Mazak Quickturn. Test object was an Aluminium workpiece with a 400 mm tube length. Clamping depth was 7 mm, the tightening torque of the moving jaw was 30 Nm. With a speed of 300 rpm both in roughing and finishing a first success became apparent. The result of the roundness measurement confirms: The production tolerance after machining was ony 0,08 mm at the clamping end and 0,03 mm on the outfeed side. Matthias Ahrend who is responsible for production planning and control at Mey & Andres is satisfied: „For only having used InoTop® for a short while we have already achieved some remarkable results and significantly reduced the rejection rate."