Argument about multitasking in milling field

Argument about multitasking in milling field

When the word "multitasking" is applied to machine tools, the term generally refers to a machine that is capable of both turning and milling. That definition is fine as far as it goes. However, turning and milling are two fairly similar operations. They both use a cutting edge to make a chip, and they both occur at roughly the same stage in a production process. If the argument for multitasking has to do with reducing both the delay and the potential for error that come from transporting parts between different machines, then that argument gains strength if the multitasking machine can combine operations that are even further removed from one another in the production process.
For example, what about combining milling and grinding
Grinding, of course, is typically thought of as a finishing operation. Milling is more about removing a stock envelope. In many plants, these two operations are performed in different locations. In an even larger number of plants, they are performed by different employees who have different skills. Combining the two operations would not seem to be an obvious choice.
However, certain profile grinding machines have developed in the direction of this type of multitasking, even when combining operations was not necessarily the goal. The MFP-TC grinding machine pictured, from Magerle (represented in the United States by United Grinding Technologies, Miamisburg, Ohio), provides an example. To support an increasing role for creep-feed grinding (a higher-metal-removal rate process than grinding just for finish), this machine features a powerful spindle and stiff hydrostatic ways. Further, because wheel types such as conventional abrasive, plated CBN and vitrified CBN all excel in different applications, the machine has been equipped with the capability to store different wheels and automatically switch between them.
This latter feature relies on proven technology. Specifically, it relies on a toolchange arm like that of a machining center, along with toolholders (or wheelholders in this case) that use the HSK interface of a machining center's toolholders. Taken together, this machine's tool changing, spindle power and rigidity produce the equivalent of a highly capable machining center. Precise heavy milling can be performed on this machine, and milling and drilling tools can be stored in the tool magazine alongside the grinding wheels.

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