High-performance deep grinding, with increased wheel peripheral speed and increased feedrate, is a special case requiring a cooling lubricant supply system adapted in terms of pressure and volume flow capability [Rowe and Jin 2001]. Application limits for high-performance grinding result from wheel safety requirements, that is, the maximum admissible peripheral speeds for grinding wheels. These […]
Рубрика: Handbook of Machining with Grinding Wheels
Selection of Metal Removal Process
One of the most fundamental decisions for the process engineer is to decide which is the most suitable metal removal process. For example, EDM is a relatively slow method for cutting complex forms but Dresser Spindle Blade station 2 Blade station 1 Demountable base plate FIGURE 16.28 Parts ganged up in […]
Heat Convection by Coolant and Chips
In deep grinding, the long contact length allows substantial convective cooling from the grinding coolant. Also, in high-rate grinding with low specific energy, the heat taken away by the grinding chips reduces maximum temperature very substantially [Rowe and Jin 2001]. One of the advantages of high-rate grinding is that specific energy is reduced. Allowance can […]
MACHINE TOOL SELECTION. Introduction
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
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 […]
Materials, Grinding Wheels, and Grinding Variables
19.10.9.1 AISI 52100 Steel Five grinding wheels were employed for easy-to-grind bearing steel AISI 52100. The wheels are listed in Table 19.4. The medium-speed wheels were larger than the high-speed wheels as indicated in Table 19.3. A two-level experimental arrangement for eight factors based on an L1628 array was used to determine the best conditions […]
Dynamic Compliances
The effect of the frequency response function for machine system compliances can be demonstrated using a second-order single degree of freedom system defined by
REGENERATIVE SELF-EXCITED VIBRATIONS
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 […]
TYPES OF GRINDING FLUIDS
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 […]
Acceleration Sensors
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 […]