SYSTEM AND METHOD FOR AUTOMATED OBJECT MEASUREMENT

• US 20160033251A1
• Filed: 07/23/2015
• Published: 02/04/2016
• Est. Priority Date: 07/29/2014
• Status: Abandoned Application

• Current Assignee: Plethora Corporation
• Original Assignee: Plethora Corporation
• Inventors: Pinkston, Nicholas J., Stults, Jonathan
• Application Number:
  US14/807,050
• Publication Number:
  US 20160033251A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01B 21/00 Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
• CPC Class Codes: G01B 5/008 using coordinate measuring machines
• CPC Class Codes: G05B 19/4097 characterised by using design data to control NC machines, e.g. CAD/CAM G05B19/4093 takes precedence
• CPC Class Codes: G05B 19/41875 characterised by quality surveillance of production
• CPC Class Codes: G05B 2219/35218 From cad data derive fixture configuration and assembly program
• CPC Class Codes: G05B 2219/37205 Compare measured, vision data with computer model, cad data
• CPC Class Codes: G05B 2219/49123 Simulation of clamping workpiece, modeling fixture and workpiece
• CPC Class Codes: Y02P 90/02 Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Abstract

A method for automated part probing using a physical machine defining a physical working volume, the method including: generating a virtual model based on a virtual part design received from a user account, the virtual model comprising a virtual part model, based on the virtual part design, virtually fixed to a virtual fixture plate arranged within a virtual working volume representative of the physical working volume; generating a probing routine based on the virtual model; sending the probing routine to the machine; receiving probe outputs from the machine; and validating the virtual model based on the probe outputs.

Claims

1. A method for automated part probing of a fixture plate with a machining system, the method comprising:

generating a virtual fixture assembly comprising a first and second virtual part model fixed to a virtual fixture plate, wherein the first and second virtual part model are associated with a first and second user account, respectively;

generating fixturing instructions to fix a first and second physical part precursor to a physical fixture plate to form a physical fixture assembly corresponding to the virtual fixture assembly, wherein the first and second physical part precursors correspond to the first and second virtual part precursors, respectively, and the physical fixture plate corresponds to the virtual fixture plate;

generating probing instructions for the physical fixture assembly based on the virtual fixture assembly and a predetermined work coordinate system;

generating expected probe outputs based on the virtual fixture assembly;

controlling the machining system to execute the probing instructions on the physical fixture assembly;

receiving actual probe outputs from the machining system for the physical fixture assembly; and

validating the physical fixture assembly based on the actual probe outputs and the expected probe outputs.

2. The method of claim 1, wherein:

the physical fixture plate defines a first and second discrete fixturing position, and the virtual fixture plate comprises a first and second virtual discrete fixturing position corresponding to the first and second discrete fixturing positions, respectively;

generating the virtual model comprises arranging the first virtual part model at the first virtual discrete fixturing position and arranging the second virtual part model at the second virtual discrete fixturing position; and

the fixturing instructions comprise instructions to fix the first part precursor to the first discrete fixturing position and to fix the second part precursor to the second discrete fixturing position.

3. The method of claim 2, further comprising controlling a fixturing system to execute the fixturing instructions.

4. The method of claim 1, wherein validating the physical fixture assembly comprises:

in response to the actual probe outputs substantially matching the expected probe outputs, controlling the machining system to execute a machining procedure; and

in response to the actual probe outputs differing from the expected probe outputs by a threshold difference;

maintaining the predetermined work coordinate system;

identifying a misaligned physical component of the physical fixture assembly based on the actual probe outputs;

generating secondary fixturing instructions to orient the misaligned physical component according to the virtual fixturing assembly; and

controlling the machining system to execute the probing instructions.

5. A method for automated part probing using a physical machine defining a physical working volume, the method comprising:

generating a virtual model based on a virtual part design received from a user account, the virtual model comprising a virtual part model, based on the virtual part design, virtually fixed to a virtual fixture plate arranged within a virtual working volume representative of the physical working volume;

generating a probing routine based on the virtual model;

sending the probing routine to the machine;

receiving probe outputs from the machine; and

validating the virtual model based on the probe outputs.

6. The method of claim 5, wherein the virtual fixture plate is representative of a physical fixture plate, wherein the physical fixture plate defines a discrete fixturing position at a first position;

wherein the virtual fixture plate comprises a virtual representation of the discrete fixturing position arranged at a first virtual position corresponding to the first position, wherein generating the virtual model comprises virtually arranging the virtual part model at the virtual discrete fixturing position.

7. The method of claim 6, further comprising:

generating fixturing instructions to fix a physical part precursor corresponding to the virtual part model to the discrete fixturing position; and

sending the fixturing instructions to a fixturing system.

8. The method of claim 7, further comprising executing the probing routine at the machine in response to determination that the physical fixture plate is arranged within the physical working volume.

9. The method of claim 7, wherein:

the physical fixture plate further defines a second discrete fixturing position at a second position discrete from the first position;

the virtual fixture plate further comprises a second virtual discrete fixturing position arranged at a second virtual position corresponding to the second position;

the virtual model further comprises a second virtual part model, based on second virtual part design received from a second user account different from the first user account, arranged at the second virtual discrete fixturing position; and

the fixturing instructions further comprise instructions to fix a second part precursor, corresponding to the second virtual part model, to the second discrete fixturing position.

10. The method of claim 6, wherein the physical working volume comprises a physical base plate configured to receive and retain the physical fixture plate at a discrete fixture plate position, wherein the virtual model comprises a virtual base plate comprising a virtual representation of the discrete fixture plate position, wherein generating the virtual model comprises virtually arranging the virtual fixture plate at the virtual discrete fixture plate position.

11. The method of claim 5, wherein generating the probing routine comprises generating the probing routine based on the virtual model and a predetermined work coordinate system.

12. The method of claim 11, further comprising:

determining a difference between the virtual model and physical analogs of the virtual model based on the probe outputs; and

in response to determining the difference, maintaining the predetermined work coordinate system and generating orientation instructions to orient the physical analogs according to the virtual model.

13. The method of claim 5, wherein validating the virtual model based on the probe outputs comprises:

confirming that a physical position of each physical part precursor within the physical working volume substantially matches a virtual position of the respective virtual part model within the virtual working volume, based on the probe output and an expected output, wherein the expected output is determined based on the virtual model.

14. The method of claim 13, wherein the virtual fixture plate is representative of a physical fixture plate, wherein validating the virtual model based on the probe outputs further comprises:

confirming that a physical position of the physical fixture plate within the physical working volume substantially matches a virtual position of the virtual fixture plate within the virtual working volume, based on the probe output and the expected output.

15. The method of claim 13, wherein the virtual model is validated as the probe outputs are received.

16. The method of claim 13, further comprising:

in response to the probe output substantially matching the expected output, controlling the machine to execute a machining procedure.

17. The method of claim 16, further comprising, in response to the probe output differing from the expected output beyond a threshold difference:

identifying a misaligned component based on the difference between the probe output and the expected output; and

determining an orientation of the misaligned component within the physical working volume using an orientation determination mechanism.

18. The method of claim 17, further comprising generating positioning instructions to orient the component based on the virtual model.

19. The method of claim 17, further comprising:

modifying the virtual model to reflect the orientation of the misaligned component.

20. The method of claim 17, wherein the orientation determination mechanism comprises a vision system.