Machine tool with a rotatable supported part

DETAILED DESCRIPTION In view of the above, it is an object of the present invention to increase the operating reliability and machining quality of the known machine tool with a physically simple design.
In the case of the machine tool mentioned at the outset, this object is achieved, according to the invention, by the fact that the outlet is connected to a fluid sensor which detects the emerging fluid and reports the leak.
The object underlying the invention is completely achieved in this fashion.
Specifically, the inventor has recognized that operating reliability can be impaired not only by flooding with leaking fluid, but also by the fact that the leaking fluid does not arrive at its intended location, where its "absence" can also lead to damage.
For example, a major leak in the rotary leadthrough can lead to failure of internal cooling of the tools or delivery of rinsing fluid, so that the tool heats up impermissibly and/or chips and dust particles can no longer be removed from the tool or workpiece.
The use of the fluid sensor in conjunction with the rotary leadthrough now ensures protection of the workpiece and tool by the fact that the reported leak leads to an interruption in machining.
For this purpose, the fluid sensor can, for example, be connected to the sequence controller of the machine tool, although it is also possible simply for a visible or audible alarm to be triggered, which then prompts operating personnel to interrupt the working process.
The new machine tool thus makes possible a simple process monitoring system which not only increases the operating reliability of the new machine tool, but moreover also ensures better machining quality than was possible with the related art.
In an embodiment, it is preferred if the fluid sensor reports the emergence of fluid only above a specific leakage rate.
The advantage here is that slight leaks during activation of, for, example, the internal cooling system are not reported, but instead only a serious leak leads to a report.
In other words, a leak which often occurs upon activation of the internal cooling system at the rotary leadthrough, which then seals itself, is not reported, and neither is a slight leak which leads to only a dripwise loss of fluid