Хонинговальные головки

In 1938, in the first edition of Grinding Wheels and Their Uses, Heywood wrote: “Internal grinding machines are being improved so rapidly that a machine only a few years old is practically certain to make the internal grinding operation cost more than it would with a later model.” The most striking fact about this statement […]

The control wheel is usually a rubber bond wheel. The rubber bond allows the regulating wheel to fulfill three important functions. These are to provide sufficient friction for speed control, to provide sufficient flexibility for error averaging, and to provide a surface that can be easily machined to provide accurate positioning. The rubber bond satisfies […]

Costs per part were evaluated for each grinding wheel using redress life from the trials. Cost comparisons were made based on conditions yielding best results from previous trials. Figure 19.28 shows typical redress life results. The end of the redress life is indicated when the process no longer yields roughness, roundness, or any other quality […]

19.12.6.1 Static Compliance Static compliance of the machine system is simply the inverse of static stiffness. Static compliance depends primarily on the elasticity of the wheels, bearings, slideways, and machine structure. System behavior, including the effect of static compliance, is similar to the results given by the simulations in Section 19.11. For this case H […]

To evaluate the machining process, the development of process forces was analyzed for a path — controlled feed speed. Figure 20.14 illustrates that a grinding operation without ultrasonic assistance Material removal rate of peripheral plunge grinding Grinding tool: D46…151 St50 C90 Cooling lubricant: Solution 4%, p = 5 bar Cutting velocity: vca = 3.1 m/s […]

8.6.1 Modeling of Dynamic Grinding Processes A mathematical model of dynamic grinding process can be established taking the factors shown in Figure 8.6 into account. The characteristic parameters in grinding dynamics, which are not generally necessary to consider in cutting dynamics, are the contact stiffness of the grinding wheel and the grinding damping. A comprehensive […]

Grinding fluids are commercially available with different property profiles to meet the requirements of specific machining tasks. DIN 51 385 divides grinding fluids into • Water-immiscible • Water-miscible • Water composite fluids The more general fields of application of cooling lubricants are cutting and partial forming processes [DIN 51 385]. Water-immiscible cooling lubricants are generally […]

In abrasive processes, the major application for acceleration sensors is related to balancing systems for grinding wheels. Especially large grinding wheels without a metal core may have a significant unbalance at the circumference. With the aid of acceleration sensors, the vibrations generated by this unbalance are monitored during the rotation of the grinding wheel at […]

Hard turning can remove stock much faster and with lower forces than regular grinding processes but it cannot hold quite the tolerances and finishes of grinding. However, when combined in a single machine with a single chucking the two processes can enhance each other. The photographs in Figure 12.4 show an operation to process two […]

The material-removal rates in grinding of ceramics vary widely depending on the application (Figure 14.5). With recent advances toward understanding of the mechanics of grinding ceramics, it is possible to achieve material-removal rates comparable to that in metal grinding. However, current practice achieves only about a tenth of these material-removal rates. FIGURE 14.6 Surface contact. […]