The Relationship between Components of the Cutting Power and the Instantaneous Cutting Capacity when Creep-Feed Grinding the Titanium Alloy with Continuous Dressing of Abrasive Tools

The article describes the patterns ruling the changes of the cutting force components when creep-feed grinding workpieces of varying lengths made of VT8 titanium alloy. It is shown that the use of continuous dressing can help to stabilize the grinding process, and reduce the cutting force components Pz and Py 2 to 3 times. At the incision and exit stages, the cutting force components as well as the nominal instantaneous cutting capacity are described by incomplete polynomials of the second degree with a high validity coefficient. When grinding with a diamond roller with continuous dressing of the abrasive tool, the change patterns of the instantaneous cutting capacity and the cutting force components Pz and Py are the same not only at the incision and exit stages, but also at the stage of constant length of arc (or transition stage). The numerical values of the pair correlation coefficient of the cutting forces Pz, Py, and the nominal instantaneous cutting capacity q indicate a high coupling force between them. The functional relationship between the parameters is approximated by a direct proportional relation. Using the proportionality coefficient, the calculated values of the nominal instantaneous cutting capacity qb are translated into model values of the cutting force components. A specialized software system that can model solid body parameters is developed to automate the calculations and modelling of creep-feed grinding. The system visualizes creep-feed grinding through step-by-step animation, calculates reliability factors and models cutting force components of the process.

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