水溶性加工液の導電性を用いた研削液膜厚センサーの開発

抄録

If it is able to predict an amount of grinding fluid around a grinding point, it made possible to avoid both a grinding burn and a grinding crack in a hard grinding condition. Thinking about a heat balance of near the grinding point, deference of a induced heat generated by tangential grinding force and a removal heat by grinding fluid nad grinding chip penetrates into a workpiece surface, and generates a temperature rise up caused such as a microstructural change and also a thermal crack. Because of the tangential grinding force is measured by a load cell easily, then if the amount of the grinding coolant can be assumed, the balance of heating and also cooling can be predicted. So, a grinding fluid sensor is developed. This sensor consists from six Cu electrodes which are mounted at equal intervals in the acrylic resin block, which is mounted workpiece external slot. And it is supplied by a DC power source with a constant current mode. The electrodes are arrange to radially, and when open end electrodes contact the grinding fluid which has a electrical conductivity, currents flow from plus electrodes into minus electrodes. Because the current generate voltage, then the voltage is recorded by recorder. Analyzing of grinding fluid thickness will be a post process, the thickness of the grinding fluid distribution in one turn can be obtained. The thickness of the grinding point becomes small amount, it made clear that the grinding burn and/or grinding crack might be induced.