Method for operating a machine tool, and machine tool
In a method for operating a machine tool, a machine-specific flow resistance and a respective tool-specific flow resistance are ascertained for various tools. Tool-specific regulator parameters for regulating a pump of a coolant lubricant device are computed on the basis of the machine-specific flow resistance and the tool-specific flow resistance of the tool chucked in a tool spindle. Subsequently, the machine tool is operated using the tool-specific regulator parameters. In this way, a rapid and exact feed of coolant lubricant to the machining point of the respective chucked tool is enabled in a simple and flexible manner.
1. A method for operating a machine tool, the method comprising the following steps:
providing a machine tool comprising at least one tool spindle and a coolant lubricant device having a pump for supplying the at least one tool spindle with a coolant lubricant;
chucking a tool in the at least one tool spindle;
computing tool-specific regulator parameters for regulating the pump based on a machine-specific flow resistance for the coolant lubricant and a tool-specific flow resistance for the coolant lubricant; and
operating the machine tool using the tool-specific regulator parameters, wherein the machine-specific flow resistance is ascertained by operating the machine tool without the tool.
2. The method as claimed in claim 1 , wherein the machine-specific flow resistance is ascertained from a pump speed, a pump characteristic curve, and a coolant lubricant pressure.
3. The method as claimed in claim 1 , wherein the machine-specific flow resistance is stored in a control device.
4. The method as claimed in claim 1 , wherein the tool-specific flow resistance is ascertained by operating the machine tool using the tool chucked in the at least one tool spindle.
5. The method as claimed in claim 1 , wherein the tool-specific flow resistance is ascertained from an overall flow resistance and the machine-specific flow resistance.
6. The method as claimed in claim 1 , wherein the tool-specific flow resistance is ascertained from a pump speed, a pump characteristic curve, a coolant lubricant pressure, and the machine-specific flow resistance.
7. The method as claimed in claim 1 , wherein the tool-specific flow resistance is stored in conjunction with an identification in a control device.
8. The method as claimed in claim 7 , wherein the tool-specific flow resistance is stored in conjunction with at least one of a tool identification and a tool type identification in the control device.
9. The method as claimed in claim 1 , wherein at least one of the machine-specific flow resistance and the tool-specific flow resistance is ascertained in dependence on a number of active tool spindles.
10. The method as claimed in claim 1 , wherein the tool-specific flow resistance is ascertained using basic regulator parameters for regulating the pump.
11. The method as claimed in claim 1 , wherein a coolant lubricant pressure is measured.
12. The method as claimed in claim 1 , wherein computation of tool-specific regulator parameters is repeated after a tool change.
13. The method as claimed in claim 1 , wherein during operation of the machine tool, a coolant lubricant pressure is regulated by the pump.
14. The method as claimed in claim 1 , wherein during operation of the machine tool, the pump is regulated and after reaching a target range, the pump is controlled.
15. A machine tool, comprising:
at least one tool spindle;
a coolant lubricant device having a pump for supplying the at least one tool spindle with a coolant lubricant; and
a control device configured such that tool-specific regulator parameters for regulating the pump are computed based on a machine-specific flow resistance for the coolant lubricant and a tool-specific flow resistance for the coolant lubricant, wherein the machine-specific flow resistance is ascertained by operating the machine tool without the tool, the machine-specific flow resistance is stored in the control device, the tool-specific flow resistance is ascertained by operating the machine tool using the tool chucked in the at least one tool spindle, and the tool-specific flow resistance is stored in conjunction with an identification in a control device.
16. A manufacturing facility comprising:
multiple machine tools and a central control device, each of the machine tools comprising at least one tool spindle, a coolant lubricant device and a control device, the coolant lubricant device having a pump for supplying the at least one tool spindle with a coolant lubricant, the control device being configured such that tool-specific regulator parameters for regulating the pump are computed based on a machine-specific flow resistance for the coolant lubricant and a tool-specific flow resistant for the coolant lubricant, wherein the machine-specific flow resistance is ascertained by operating the machine tool without the tool and the machine-specific flow resistance is stored in the control device, the tool-specific flow resistance is ascertained by operating the machine tool using the tool chucked in the at least one tool spindle, and the tool-specific flow resistance is stored in conjunction with an identification in a control device.
17. A method for operating a machine tool, the method comprising the following steps:
providing a machine tool comprising at least one tool spindle and a coolant lubricant device having a pump for supplying the at least one tool spindle with a coolant lubricant;
chucking a tool in the at least one tool spindle;
computing tool-specific regulator parameters for regulating the pump based on a machine-specific flow resistance for the coolant lubricant and a tool-specific flow resistance for the coolant lubricant; and
operating the machine tool using the tool-specific regulator parameters, wherein the tool-specific flow resistance is ascertained by operating the machine tool using the tool chucked in the at least one tool spindle.