Protection apparatus for a machine tool, at least for protecting a workpiece surface against overheating

1. A protection apparatus of a machine tool for protecting at least a workpiece surface against overheating, comprising:

at least one sensor unit including at least one sensor element that detects at least one characteristic variable of a fluid flow provided for transporting material removed from a workpiece; and

at least one evaluation unit that enables identifying at least one temperature of a workpiece surface of the workpiece to be machined by the machine tool based at least in part upon the at least one characteristic variable detected via the at least one sensor unit,

wherein the at least one sensor unit further includes at least one further sensor element that detects at least one characteristic volumetric flow rate variable of the fluid flow.

2. The protection apparatus according to claim 1 , wherein the at least one sensor element detects at least one of a temperature of the fluid flow and a change in temperature of the fluid flow.

3. The protection apparatus according to claim 1 , further comprising:

a control unit that actively influences at least one motor control system with reference to the at least one characteristic variable detected via the at least one sensor unit;

wherein the control unit is configured to operate in at least one of an open-loop and a closed loop fashion.

4. The protection apparatus according to claim 1 , further comprising at least one output unit configured to output at least one item of information based at least in part upon the at least one characteristic variable detected via the at least one sensor unit.

5. The protection apparatus according to claim 1 , further comprising at least one communication unit configured to communicate with at least one external unit.

6. A machine tool system, comprising:

a machine tool that includes

at least one protection apparatus that has:

at least one sensor unit with at least one sensor element that detects at least one characteristic variable of a fluid flow provided for transporting material removed from a workpiece; and

at least one evaluation unit that enables identifying at least one temperature of a workpiece surface of the workpiece to be machined by the machine tool based at least in part upon the at least one characteristic variable detected via the at least one sensor unit; and

at least one suction removal apparatus configured to provide the fluid flow,

wherein the at least one sensor element is positioned in the fluid flow.

7. The machine tool system according to claim 6 , wherein the protection apparatus further has at least one operator control unit configured to selectively activate and deactivate the protection apparatus.

8. The machine tool system according to claim 7 , wherein the operator control unit has at least one selector function that enables a selection of a type of workpiece, and that is configured to match the protection apparatus to at least different workpiece materials of workpieces that are to be machined.

9. The machine tool system according to claim 6 , wherein the at least one sensor element detects at least one of a temperature of the fluid flow and a change in temperature of the fluid flow.

10. The machine tool system according to claim 6 , wherein the at least one sensor unit further includes at least one further sensor element that detects at least one characteristic volumetric flow rate variable of the fluid flow.

11. The machine tool system according to claim 6 , wherein the at least one protection apparatus further comprises:

a control unit configured to actively influence at least one motor control system with reference to the at least one characteristic variable detected via the at least one sensor unit, the control unit configured to operate in at least one of an open-loop and a closed loop fashion.

12. The machine tool system according to claim 6 , wherein the at least one protection apparatus further comprises:

at least one output unit configured to output at least one item of information based at least in part upon the at least one characteristic variable detected via the at least one sensor unit.

13. The machine tool system according to claim 6 , wherein the at least one protection apparatus further comprises:

at least one communication unit configured to communicate with at least one external unit.