News 2007
OCT / 29 / .2007
Patent confirmed
The Federal German patent Court in Munich confirmed the continued existence of a patent held by Dr. Klaus Nordmann on 15/10/07 on appeal after rejecting a claim by a competitor. The patent concerns a "procedure for monitoring workpiece size and improving machining process accuracy in machine tools" (the patent text is available as a PDF file). The patent details a method of micrometrically precise manufacture of workpieces in machine tools with the aid of acoustic detection of contact between workpiece or workpiece machining point and tool. Thermal expansion and spring-back between tool and workpiece are detected using this process and compensated for so that without additional metrology equipment workpieces can be produced with previously unachievable accuracy.
OCT / 05 / .2007
New workpiece length probe "WLT"
New workpiece length probe "WLT", a rugged probe for the longitudinal measurement of workpieces primarily in multi-spindle machine tools developed by Nordmann in cooperation with a major automobile industry supplier. Compared to its BDA Pilz predecessor the new probe lacks any grooves in which swarf might accumulate. The new probe cannot be bent or broken off when removing swarf from the workspace of the new probe. If subjected to great force, as in a collision with an overlong workpiece, the probe itself isn't damaged: The fastening screws of its guide rail break instead under the head at a predetermined breaking point. This guide rail also permits precision adjustment of the exact position of the WLT relative to the workpiece.
Workpiece length probe WLT
OCT / 01 / 2007
Lecture at the TU Dresden
IAt the Fachkolloquium "Innovative machine tools" Dr. Klaus Nordmann and Ralph Goebel gave a lecture on "Tool monitoring - accompanying the process and post-process supplementing one another sensibly".
The lecture was given on 28/09/07 at the TU Dresden. The subject of the lecture was that it isn't only the tool monitoring accompanying a process that´s sensible and beneficial but that there may well be situations in which monitoring before or after machining is a better idea. In the Nordmann Tool Monitors both procedures can be sensibly combined. Nordmann can supply the necessary probes and sensors for the purpose (download the lecture as a Powerpoint file).
Other lectures from the Kennametal, Mapal, CeramTec, Emuge, Karl Klink, Platit, Komet and TDM Systems companies and the TUs Dresden and Chemnitz dealt with machine tool engineering matters.
FEB / 02 / 2007
New "LSM" sensor for process monitoring by air sound
There are situations in which despite an already comprehensive range of acoustic emission sensors metrology value recording near the tool/s SEH, SEA Mini, SEA Spring, SEA Wireless, BSA) is problematical or e.g. installation of acoustic sensors rotating with the workpiece or tool (RSA, RSA 2 or RSA Ring) is too expensive.
In such cases contactless acoustic emission metrology may be successful. A new acouctic emission sensor (LSM) measuring in the ultrasound range has been designed for rugged use close to machining for this reason. Flying swarf cannot damage the ceramic membrane of the LSM.
Its fields of use include e.g. machining without cooling lubricants or with minimal lubrication, monitoring individual drill tips in multi-bit drill heads, aircut bridging and dressing grinding discs with rotary dressing tools.
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