Хонинговальные головки

Rounding geometry was introduced in Section 19.2.5. A question of interest is whether centerless grinding is ultimately capable of the highest standards of roundness. In recent years, it has become apparent that achievable standards of roundness are approaching the limits of available measuring machines [Hashimoto et al. 1983]. The question of ultimate roundness is less […]

Up boundaries were colored blue in Figure 19.56. Unstable zones lie above the up line and stable zones beneath. An example shows a stable zone marked with a “+” sign and an unstable zone marked with a “-” sign. Up boundaries were determined by calculating the angle x for each point on the boundary from […]

In order to suppress vibrations in grinding, it is necessary to identify whether it is forced vibration or self-excited vibration. Figure 8.2 provides a possibility for identifying the type of vibration in grinding. If the vibration is detected while the machine idles, it is forced vibration. Vibrations with higher frequency than the grinding wheel rotational […]

10.8.1 Introduction The design of a supply system and the selection of the feed parameters must meet the specific technological demands of the grinding process. Since the cooling of the grinding process primarily depends on cooling lubricant supply to the contact zone, secondary cooling effects play only a minor role, hence the percentage of the […]

11.4.1 Introduction Two essential quality aspects determine the result of a grinding process on the workpiece. On the one hand, the geometrical quality demands have to be fulfilled. These are dimension, shape, and waviness as essential macrogeometrical quantities. The roughness condition is the main microgeo­metrical quantity. However, increasing attention is also paid to the surface […]

The last group of alloys is the stainless steels defined as steels containing more than 10% chromium. These are designed first and foremost to resist oxidation where they are used in the food, medical, petroleum, and chemical industries. In addition, some precipitation-hardened stainless steels are Comparison of G-ratio values grinding conventional and PM tool steels […]

Builders have sought alternative means of providing improved damping. One method is the use of a polymer matrix composite made using crushed concrete, granite, or quartz with trade names such as Granitan S103 [Studer n. d.], Mineralit [Emag 1998], and Micro-Granite [Elb 1997]. The materials have significantly greater damping characteristics than steel or even cast […]

Linear motors demand fast positional monitoring response made possible by using linear encoders based on laser interferometry. The simplest form using a homodyne laser is illustrated in Figure 15.27. A laser beam, L, is split by a neutral beam splitter, N, into two beams. The measuring beam strikes the measuring reflector, MR, which is returned […]

The key to any infeed system is high stiffness and damping, repeatability, and ease of mainte­nance. The units described below (Courtesy Wheel Dressing Division of Saint-Gobain Abrasives) have proven effective over numerous years in the field. There are a variety of designs combining dresser spindle units and infeed systems varying according to the application and […]

16.5.1 Creep Feed Grinding with Vitrified Wheels Containing Alox and Silicon Carbide In general, as depths of cut increase so do grinding forces, while uncut chip thickness and, therefore, roughness and force/grit decrease. However, when the depth of cut becomes extreme, that is, greater than 1 to 3 mm maximum grinding temperatures can actually fall. […]