ESTIMATION OF CUTTING TEMPERATURE DURING TURNING
Abstract
Abstract : Cutting temperature plays a very important role in metal cutting. The extent of the tool wear, degree of plastic deformation of the cutting edge and composition changes in the work piece material are influenced by cutting temperature. Of the several methods available for measuring cutting temperature, the tool-work thermocouple technique is the most widely used. Apart from the problem of a reliable calibration, frequent short-circuiting by the chip complicates measurement of thermo e.m.f in this method. This problem becomes more acute when multi-coated inserts with sculptured rake face geometry are used. The above mentioned problems associated with the tool-work thermocouple prompted an attempt to develop a new technique to predict cutting temperature during turning. In this method two standard k-type thermocouples were planted at the interface between the tool insert and the tool holder symmetrically . The bottom of the insert and the two sides were insulated for thermal isolation of the insert from the tool holder. The temperatures at these nodal points as measured by the thermocouples were correlated to cutting temperature using finite volume technique. An estimate of the effective heat transfer coefficient of the environment prevailing during cutting operation which is essential for developing this model was determined experimentally by a systematic procedure described in this paper.
Event details
- Event
- XVI IMEKO World Congress
- Place
- Vienna, AUSTRIA
- Time
- 25 September 2000 - 28 September 2000