Method for the automatic determination of the geometrical dimensions of a tool in a gear cutting machine

Patent metadata

Field	Value
Publication number	US-10722994-B2
Application number	US-201815861912-A
Country	US
Kind code	B2
Filing date	Jan 4, 2018
Priority date	Jan 5, 2017
Publication date	Jul 28, 2020
Grant date	Jul 28, 2020

Abstract

The application relates to a method for the automatic determination of the geometrical dimensions of a tool having a machining region in worm thread form, in particular of a grinding worm, in a gear cutting machine, wherein at least one parameter of the tool is automatically detected and/or determined by means of at least one sensor.

First claim

The invention claimed is:

1. A method for automatic determination of geometrical dimensions of a tool having a machining region in worm thread form in a gear cutting machine, comprising:
automatically detecting and/or determining at least one parameter of the tool which the gear cutting machine requires for a subsequent workpiece machining, via at least one sensor,
wherein a pitch, a module, a diameter, a worm width, a worm thread lead, and/or a V position of the tool, including of a grinding worm is/are determined automatically via a calculators processing of the detected and/or determined parameters.

2. The method in accordance with claim 1 , wherein a position of the tool within the gear cutting machine and main geometrical dimensions including tool length, tool diameter, and/or a number of starts of the tool, and/or a lead direction of the tool are determined.

3. The method in accordance with claim 2 , wherein a calibration process is carried out to determine a location of the sensor with respect to the tool, including the grinding worm, and/or with respect to the positioning of the tool within the gear cutting machine.

4. The method in accordance with claim 1 , wherein an alignment of the tool to a predefined reference point, including an alignment of an A axis to 0°, is carried out for determining a number of starts, and subsequently the sensor detects a plurality of revolutions, including three revolutions, of the tool, including of the grinding worm, about a B axis.

5. The method in accordance with claim 1 , wherein at least one respective measurement is carried out for determining a lead direction via the sensor above and below a center axis of the tool, including of the grinding worm.

6. The method in accordance with claim 1 , wherein the tool is rotated and a lead direction is determined by a mutual shift of the sensor and/or of the tool in a V direction.

7. The method in accordance with claim 1 , wherein the method includes meshing the tool, including the grinding worm, based on the determined parameter, including traveling the tool along a longitudinal direction or V axis direction or V direction of said grinding worm, with a position of teeth along the V axis direction being determined by means of the sensor.

8. The method in accordance with claim 1 , wherein the sensor is configured as one or more of an inductive sensor, a capacitive sensor, and/or an ultrasound sensor, with the sensor being an analog and/or a digital sensor.

9. The method in accordance with claim 1 , wherein a determination of different parameters takes place via the sensor; the method further comprising automatically meshing asymmetrical profiles based on the determination of the different parameters.

10. A gear cutting machine for carrying out the method in accordance with claim 8 , wherein a sensor for scanning a grinding worm is provided at the gear cutting machine.

11. A gear cutting machine for carrying out the method in accordance with claim 1 , wherein the tool having the machining region in worm thread form includes a grinding worm.

12. A method, comprising:
automatically determining geometrical dimensions of a tool having a machining region in worm thread form, including a grinding worm in a gear cutting machine, including detecting and/or determining at least one parameter of the tool automatically via a controller having instructions stored therein, the instructions determining the parameter based on at least one sensor,
the controller adjusting an actuator of the gear cutting machine based on the determined/detected parameter according to further instructions,
and subsequently machining a workpiece using the tool,
wherein a pitch, a module, a diameter, a worm width, a worm thread lead, and/or a V position of the tool, including of the grinding worm is/are determined automatically via a calculatory processing of the detected and/or determined parameters.

13. A method for automatic determination of geometrical dimensions of a tool having a machining region in worm thread form in a gear cutting machine, comprising:
detecting and/or determining at least one parameter of the tool automatically via at least one sensor;
wherein a pitch, a module, a diameter, a worm width, a worm thread lead, and/or a V position of the tool, including of a grinding worm is/are determined automatically via a calculatory processing of the detected and/or determined parameters;
wherein at least one respective measurement is carried out for determining a lead direction via the sensor above and below a center axis of the tool, including of the grinding worm.

Assignees

• Liebherr Verzahntech Gmbh

Inventors

• Stach Stefan
• Buchenberg Andreas
• Schoellhorn Martin
• Schollenburch Uli

Classifications

• B23F23/006 Primary

  Equipment for synchronising movement of cutting tool and workpiece, the cutting tool and workpiece not being mechanically coupled · CPC title

• B23Q17/2457

  of tools · CPC title

• B23Q17/22

  for indicating or measuring existing or desired position of tool or work {(B23Q16/005 takes precedence)} · CPC title

• B23F23/12

  Other devices, e.g. tool holders; Checking devices for controlling workpieces in machines for manufacturing gear teeth · CPC title

• B23Q17/0914 Primary

  Arrangements for measuring or adjusting cutting-tool geometry machine tools · CPC title