# US 10,245,718 B2 · Protection apparatus for a machine tool, at least for protecting a workpiece surface against overheating > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,245,718 B2 - Document ID: US10245718B2 - Status: Granted - Kind: B2 - Application number: 14/957,218 - Filed: 2015-12-02 - Published: 2016-06-02 - Granted: 2019-04-02 - Earliest claimed: 2014-12-02 - Assignees: Robert Bosch GmbH - Applicants: Robert Bosch GmbH - Inventors: Rainer Glauning - Web page: https://patentgrep.com/patent/US10245718B2 ## CPC - B25F 5/008: {Cooling means} - B23Q 11/0046: {by sucking} - B23Q 17/0985: {by measuring temperature} - B25F: COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR {(machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass B23P23/00 and subgroups)} - B23Q: DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING (tools of the kind used in lathes or boring machines B23B27/00); MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT ## Abstract A protection apparatus for a machine tool, at least for protecting a workpiece surface against overheating, includes at least one sensor unit and at least one evaluation unit. The sensor unit has at least one sensor element. The sensor element detects at least one characteristic variable of a fluid flow provided for transporting material removed from a workpiece. The evaluation enables identification of at least one temperature of a workpiece surface of the workpiece to be machined via the machine tool based at least in part upon the at least one characteristic variable detected via the sensor unit. ## Claims ### Claim 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. ### Claim 2 (depends on 1) 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. ### Claim 3 (depends on 1) 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. ### Claim 4 (depends on 1) 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. ### Claim 5 (depends on 1) The protection apparatus according to claim 1, further comprising at least one communication unit configured to communicate with at least one external unit. ### Claim 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. ### Claim 7 (depends on 6) 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. ### Claim 8 (depends on 7) 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. ### Claim 9 (depends on 6) 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. ### Claim 10 (depends on 6) 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. ### Claim 11 (depends on 6) 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. ### Claim 12 (depends on 6) 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. ### Claim 13 (depends on 6) 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.