Method for machining a workpiece

Patent metadata

Field	Value
Publication number	US-11226608-B2
Application number	US-201816761095-A
Country	US
Kind code	B2
Filing date	Oct 26, 2018
Priority date	Nov 2, 2017
Publication date	Jan 18, 2022
Grant date	Jan 18, 2022

Abstract

A system for machining a workpiece,comprising a hand-held power tool having a drive motor, a tool holder, which can be driven by the drive motor, for a working tool for machining the workpiece, and a guide element with a guide surface for guiding the hand-held power tool on the workpiece,having a marker detection device for detecting coordinate data of at least one workpiece marker of the workpiece, wherein the hand-held power tool has guide means for guiding the working tool along the workpiece according to the coordinate data of the at least one workpiece marker. The marker detection device has an optical and/or mechanical reference which can be positioned on and/or directly next to the at least one workpiece marker. The marker detection device is designed for determining the coordinate data of the at least one workpiece marker relative to an at least two-dimensional coordinates system which is independent from the workpiece markerand the guide means of the hand-held power tool are designed to guide the working tool relative to the at least two-dimensional coordinates system in a working area which is geometrically defined by working area data determined based on the coordinate data of the at least one workpiece marker.

First claim

The invention claimed is:

1. A system for machining a workpiece
comprising a hand-held power tool having a drive motor, a tool holder, which can be driven by the drive motor, for a working tool for machining the workpiece, and a guide element with a guide surface for guiding the hand-held power tool on the workpiece,
having a marker detection device for detecting coordinate data of at least one workpiece marker of the workpiece, wherein the hand-held power tool has guide means for guiding the working tool along the workpiece according to the coordinate data of the at least one workpiece marker, and wherein
the marker detection device has an optical and/or mechanical reference which can be positioned on and/or directly next to the at least one workpiece marker, and wherein
the marker detection device is designed for determining the coordinate data of the at least one workpiece marker relative to an at least two-dimensional coordinates system which is independent from the workpiece marker, and wherein
the guide means of the hand-held power tool are designed to guide the working tool relative to the at least two-dimensional coordinates system in a working area which is geometrically defined by working area data determined based on the coordinate data of the at least one workpiece marker.

2. The system according to claim 1 , wherein, in order to provide the at least two-dimensional coordinates system the system further comprises at least one coordinates sensor which can be placed in a working space in which the workpiece is arranged, and the guide means and/or the marker detection device are designed to determine the position of the at least one coordinates sensor and/or to determine reference information transmitted by the at least one coordinates sensor.

3. The system according to claim 2 , wherein the at least one coordinates sensor has fastening means for fastening to the workpiece and/or a base and/or at least one utility surface for placement on a base and/or the workpiece.

4. The system according to claim 1 , wherein the at least one coordinates sensor is designed to transmit reference information in mutually angular directions and/or in mutually parallel planes, wherein the marker detection device and/or the guide means are configured to detect this reference information.

5. The system according to claim 1 , wherein the guide means of the hand-held power tool and/or the marker detection device comprise an orientation means for orientation relative to the at least two-dimensional coordinates system in a working space in which the workpiece is arranged, wherein the orientation means are designed for detecting geometric contours of the working space and/or for receiving reference information characterising the position of the hand-held power tool and/or the marker detection device and/or the workpiece in the working space.

6. The system according to claim 1 , wherein the marker detection device is designed to detect the coordinate data of the at least one workpiece marker after the reference has been positioned relative to the workpiece marker according to at least one triggering condition.

7. The system according to claim 1 , wherein the triggering condition comprises an operator action of an operator which can be detected by a sensor and/or electrical switch of the marker detection device and/or a time condition, of the reference relative to the at least one workpiece marker for a predetermined time, and/or a distance detection of a distance between the reference and the at least one workpiece marker, wherein an undershooting of a predetermined limit distance between the reference and the workpiece marker is detected during the distance detection.

8. The system according to claim 1 , wherein the marker detection device is designed for tactile and/or optical selection of the at least one workpiece marker.

9. The system according to claim 1 , wherein the marker detection device is a component which is separate or which can be separated from the hand-held power tool or forms a component of the hand-held power tool, wherein the reference in particular is arranged on the guide element.

10. The system according to claim 1 , wherein the hand-held power tool has a wired and/or wireless interface for the marker detection device, via which the marker detection device can transmit the coordinate data of the at least one workpiece marker to the hand-held power tool and/or the hand-held power tool has a holding fixture for holding the marker detection device.

11. The system according to claim 1 , wherein the marker detection device does not have a drive motor for driving a working tool and/or is not or cannot be driven by a motor at least when detecting the workpiece marker.

12. The system according to claim 1 , wherein the marker detection device comprises a pen or is pen-shaped and/or has an optical light source for providing the optical reference.

13. The system according to claim 1 , wherein the guide means comprise an output device for the optical and/or acoustic output of default information relating to or defining the working area for the operator.

14. The system according to claim 1 , wherein the guide means comprise a servo motor arrangement for adjusting a relative position of the tool holder relative to the guide element.

15. The system according to claim 1 , wherein the working area comprises or is formed by a working line along which the working tool is to be guided relative to the workpiece and/or at least one machining surface of the workpiece provided for machining the workpiece.

16. The system according to claim 1 , wherein the guide means (Wand/or the marker detection device is configured to determine the working area data of the working area, on the basis of coordinate data of at least two workpiece markers, which are at a distance from one another, relative to the at least two-dimensional coordinates system.

17. The system according to claim 1 , wherein the guide means and/or the marker detection device have a receiving interface for receiving default data (VO) defining the working area and are designed to determine the working area data of the working area according to the default data.

18. The system according to claim 1 , wherein for the detection of a respective position of the marker detection device and/or the hand-held power tool, the system further comprises a coordinate detection device which can be placed in the working space in which the workpiece is arranged and which forms a structural unit separate from the hand-held power tool or the reference of the marker detection device.

19. The system according to claim 1 , further comprising a tracking means for tracking a movement of the workpiece after the detection of at least one workpiece marker by the marker detection device up to a machining position provided for machining the workpiece by the hand power tool, wherein the tracking means is designed to provide tracking data characterising this movement and/or the machining position, so that the guide means of the hand-held power tool guide the working tool on the basis of the working area data determined on the basis of the coordinate data of the at least one workpiece marker and the tracking data.

20. The system according to claim 19 , wherein the tracking means comprise at least one workpiece position detection device and/or workpiece position reference marker attached to the workpiece after detection of the at least one workpiece marker and at least until reaching the machining position.

21

Assignees

• Festool Gmbh

Inventors

• Rusch Marc
• Kübeler Matthias

Classifications

• G05B2219/39573

  Tool guidance along path · CPC title

• G01B21/00

  Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant · CPC title

• B23Q9/0014

  Portable machines provided with or cooperating with guide means supported directly by the workpiece during action · CPC title

• B23Q17/2414

  for indicating desired positions guiding the positioning of tools or workpieces (B25H1/0092 takes precedence) · CPC title

• G05B19/40938 Primary

  Tool management · CPC title