System and Method for Detecting a Geometry of a Workpiece

• US 20090048699A1
• Filed: 12/06/2006
• Published: 02/19/2009
• Est. Priority Date: 01/11/2006
• Status: Abandoned Application

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Jahn, Dirk
• Application Number:
  US12/087,719
• Publication Number:
  US 20090048699A1
• Time in Patent Office: Days
• US Class Current: 700/98
• CPC Class Codes: G01B 11/24 for measuring contours or curvatures
• CPC Class Codes: G05B 2219/37556 Camera detects fictive contour of workpiece, by reflection
• CPC Class Codes: G05B 2219/37572 Camera, tv, vision
• CPC Class Codes: G05B 2219/50071 Store actual surface in memory before machining, compare with reference surface

Abstract

There is described a system and method for detecting a geometry of a workpiece for the purposes of processing the workpiece. In order to simplify optimization of a manufacturing strategy for processing a workpiece, the system has at least one camera for producing at least one image of the workpiece before a processing step, a memory area for desired geometry values the workpiece should have after the processing step, determination means for determining workpiece geometry values the workpiece has before the processing step on the basis of the at least one image, and calculating means for calculating differential geometry values describing a difference between the workpiece geometry values and the desired geometry values.

Claims

1-19. -19. (canceled)

20. A system for determining geometric changes in a workpiece produced by a machining step, comprising:

a camera for producing at least one image of the workpiece before the machining step;

a memory region for setpoint geometry values the workpiece should have after the machining step;

a determining information for determining workpiece geometry values the workpiece has before the machining step, based on the at least one image; and

a calculation for differential geometry values, which describe a difference between the workpiece geometry values and the setpoint geometry values.

21. The system as claimed in claim 20, wherein for the calculation at least one allowance is provided, which is to be removed in the machining step to achieve the setpoint geometry values of the workpiece.

22. The system as claimed in claim 20, further comprising an adaptation for adapting a machining program provided to control the machining of the workpiece as a function of the differential geometry values.

23. The system as claimed in claim 20, wherein the memory region stores a setpoint geometry model corresponding to the setpoint geometry values, which describes the workpiece after the machining step.

24. The system as claimed in claim 23, wherein the setpoint geometry model is created via the system.

25. The system as claimed in one of claim 23, wherein the determining information is provided to determine the workpiece geometry values in the form of a workpiece geometry model.

26. The system as claimed in claim 25, wherein the differential geometry values are calculated based on the setpoint geometry model and the workpiece geometry model.

27. The system as claimed in claim 20, wherein the workpiece geometry values are determined by extracting edges of the workpiece from the image.

28. The system as claimed in claim 20, wherein a selection is provided to select a tool of a machine tool suitable for the machining step based on the differential geometry values.

29. A machine tool for machining a workpiece, comprising:

a system for determining geometric changes in a workpiece produced by a machining step, having

a camera for producing at least one image of the workpiece before the machining step,

a memory region for setpoint geometry values the workpiece should have after the machining step,

a determining information for determining workpiece geometry values the workpiece has before the machining step, based on the at least one image, and

a calculation for differential geometry values, which describe a difference between the workpiece geometry values and the setpoint geometry values.

30. A method for determining geometric changes in a workpiece, which can be produced by a machining step, comprising:

producing at least one image of the workpiece before the machining step using at least one camera;

determining workpiece geometry values the workpiece has before the machining step, based on the at least one image; and

calculating differential geometry values, which describe a difference between the workpiece geometry values and setpoint geometry values the workpiece should have after the machining step.

31. The method as claimed in claim 30, wherein the differential geometry values are calculated in the form of at least one allowance, which is to be removed from the workpiece in the machining step to achieve the setpoint geometry values.

32. The method as claimed in claim 30, wherein a machining program provided to control the machining of the workpiece is adapted as a function of the differential geometry values.

33. The method as claimed in claim 30, wherein a setpoint geometry model corresponding to the setpoint geometry values, which describes the workpiece after the machining step, is stored in a memory region.

34. The method as claimed in claim 33, further comprising creating the setpoint geometry model.

35. The method as claimed in claim 33, wherein the workpiece geometry values are determined based upon the form of a workpiece geometry model.

36. The method as claimed in claim 35, wherein the differential geometry values are calculated based on the setpoint geometry model and the workpiece geometry model.

37. The method as claimed in one of claim 30, wherein the workpiece geometry values are determined by extracting edges of the workpiece from the image.

38. The method as claimed in one of claim 30, wherein a tool of a machine tool for the machining step is selected based upon the differential geometry values.