Chatter is visible down to displacements of 10 pin. Achieving displacements below this, even with the most sophisticated hydrostatic wheel bearings, is becoming increasingly more of a challenge as wheel speeds increase. For regular hydrodynamic or ball-bearing-based spindles, some form of dynamic balancer mounted to the machine is essential. Automatic balancers are mounted on the […]
Рубрика: Handbook of Machining with Grinding Wheels
Damped Wheel Designs and Wheel Compliance
It is interesting to note that most scientific studies on “damped” wheel designs are based on suppressing self-excited chatter. Furthermore, they all use hub materials that not only have good damping characteristics, but are also considerably more compliant and lightweight than “standard” hub materials such as steel. As the following examples illustrate, it is not […]
Structure of CVD Diamond
CVD diamond forms as a fine crystalline columnar structure. There is a certain amount of preferred crystallographic orientation exhibited; more so than, for example, PCD, but far less than in single crystal diamond. Wear characteristics are therefore much less sensitive to orientation in a tool. Again, the CVD diamond is not used as an abrasive […]
Summary of Variables Affecting Wheel Performance
The number of variables for a given wheel specification that can make a significant impact on performance is quite limited. The plating thickness is held within a narrow band. The homogeneity of the plating is controlled by the plating rate and anode design. Care should be taken to avoid nodule formation especially around tight radii. […]
TRAVERSE DRESSING OF CONVENTIONAL VITRIFIED WHEELS WITH STATIONARY TOOLS
7.2.1 Nomenclature The terminology for the various parameters involved in dressing is as follows: ad = dressing depth of cut (or dress infeed amount) per pass bd = effective contact width of the dressing tool ns = grinding wheel rpm fd = axial tool traverse across grinding wheel surface, feed/rev Ud = dressing overlap ratio […]
. Truer Design for Touch Dressing
Attention must also be paid to the diamond truer design. As CBN is so much harder than conventional abrasive, the truer will wear much more per dress. This makes profiling truers with precisely lapped geometries uneconomic for most applications. Certainly for all flat form dressing applications, a truer with a consumable diamond layer is required. […]