Method and apparatus for generating fault diagnosis information base of numerical control machine tool

Patent metadata

Field	Value
Publication number	US-11188518-B2
Application number	US-201716651476-A
Country	US
Kind code	B2
Filing date	Sep 30, 2017
Priority date	Sep 30, 2017
Publication date	Nov 30, 2021
Grant date	Nov 30, 2021

Abstract

The present invention related to the technical field of industrial automation, in particular to a method and apparatus for generating a fault diagnosis database of a CNC machine tool, intended to conveniently provide comprehensive fault diagnosis information. The method comprises: setting a fault condition of the CNC machine tool; running a simulation model of the CNC machine tool under each set fault condition to generate fault, and recording a fault phenomenon of the fault; backtracking a possible fault generating each fault phenomenon, to establish an association between the fault phenomenon and a possible fault generating the fault phenomenon; generating a fault diagnosis database of the CNC machine tool according to the association established. Due to the fact that what is being run is a simulation model of the CNC machine tool, various fault conditions can be conveniently set. The fault diagnosis database established by the method has the advantage of comprehensive coverage of fault situations and abundant fault diagnosis information. The result of performing fault diagnosis on the basis of such a fault diagnosis database is more accurate.

First claim

The invention claimed is:

1. A method for generating a fault diagnosis database of a CNC (Computer Numerical Control) machine tool, comprising:
setting at least one fault condition of the CNC machine tool;
running a first simulation model of the CNC machine tool under each set fault condition respectively to generate a fault, and recording at least one fault phenomenon of the fault;
for each fault phenomenon recorded, backtracking at least one possible fault generating the fault phenomenon, to establish at least one association between the fault phenomenon and at least one possible fault generating the fault phenomenon including establishing a reverse fault propagation path of the fault phenomenon; and
generating a first fault diagnosis database of the CNC machine tool according to the at least one association established, the generating including,
generating a fault propagation model as the first fault diagnosis database according to the established reverse fault propagation path of the at least one fault phenomenon.

2. The method as claimed in claim 1 , wherein the at least one fault condition satisfies one of the following situations:
the at least one fault condition involves all components of the CNC machine tool, and each of the at least one fault condition only involves one component of the CNC machine tool; and
the at least one fault condition involves all components of the CNC machine tool, and each of a portion of or all of the at least one fault condition involves at least two components of the CNC machine tool.

3. The method as claimed in claim 1 , further comprising:
setting a semantic description of each fault phenomenon and recording same in the first fault diagnosis database, and
setting a semantic description of each fault and recording same in the first fault diagnosis database.

4. The method as claimed in claim 1 , further comprising:
running a second simulation model of the CNC machine tool under each of the at least one set fault condition respectively to generate a second fault diagnosis database; and
using the second fault diagnosis database to correct the first fault diagnosis database.

5. An apparatus for generating a fault diagnosis database of a CNC machine tool, comprising:
at least one memory for storing a machine-readable program; and
at least one processor, for calling the machine-readable program, to perform the following steps:
setting at least one fault condition of the CNC machine tool,
running a first simulation model of the CNC machine tool under each set fault condition respectively to generate a fault, and recording at least one fault phenomenon of the fault,
for each fault phenomenon recorded, backtracking at least one possible fault generating the fault phenomenon, to establish at least one association between the fault phenomenon and at least one possible fault generating the fault phenomenon, and
generating a first fault diagnosis database of the CNC machine tool according to the at least one association established, wherein
when calling the machine-readable program to establish the at least one association between the fault phenomenon and the at least one possible fault generating the fault phenomenon, the at least one processor is configured to establish a reverse fault propagation path of the fault phenomenon, and
when calling the machine-readable program to generate the first fault diagnosis database according to the at least one association established, the at least one processor is configured to generate a fault propagation model as the first fault diagnosis database according to the established reverse fault propagation path of the at least one fault phenomenon.

6. The apparatus as claimed in claim 5 , wherein the at least one fault condition satisfies one of the following situations:
the at least one fault condition involves all components of the CNC machine tool, and each of the at least one fault condition only involves one component of the CNC machine tool; and
the at least one fault condition involves all components of the CNC machine tool, and each of a portion of or all of the at least one fault condition involves at least two components of the CNC machine tool.

7. The apparatus as claimed in claim 5 , wherein when calling the machine-readable program, the at least one processor is further configured to perform:
setting a semantic description of each fault phenomenon and record same in the first fault diagnosis database, and
setting a semantic description of each fault and record same in the first fault diagnosis database.

8. The apparatus as claimed in claim 5 , wherein
when calling the machine-readable program, the at least one processor is further configured to perform:
running a second simulation model of the CNC machine tool under each of the at least one set fault condition respectively to generate a second fault diagnosis database; and
using the second fault diagnosis database to correct the first fault diagnosis database.

9. A machine-readable medium having a machine-readable instruction stored thereon which, when executed by at least one processor, causes the at least one processor to perform:
setting at least one fault condition of a CNC (Computer Numerical Control) machine tool;
running a first simulation model of the CNC machine tool under each set fault condition respectively to generate a fault, and recording at least one fault phenomenon of the fault;
for each fault phenomenon recorded, backtracking at least one possible fault generating the fault phenomenon, to establish at least one association between the fault phenomenon and at least one possible fault generating the fault phenomenon including establishing a reverse fault propagation path of the fault phenomenon; and
generating a first fault diagnosis database of the CNC machine tool according to the at least one association established, the generating including,
generating a fault propagation model as the first fault diagnosis database according to the established reverse fault propagation path of the at least one fault phenomenon.

10. The machine-readable medium as claimed in claim 9 , wherein the at least one fault condition satisfies one of the following situations:
the at least one fault condition involves all components of the CNC machine tool, and each of the at least one fault condition only involves one component of the CNC machine tool; and
the at least one fault condition involves all components of the CNC machine tool, and each of a portion of or all of the at least one fault condition involves at least two components of the CNC machine tool.

11. The machine-readable medium as claimed in claim 9 , having the machine-readable instruction stored thereon which, when executed by the at least one processor, causes the at least one processor to perform:
setting a semantic description of each fault phenomenon and recording same in the first fault diagnosis database, and
setting a semantic description of each fault and recording same in the first fault diagnosis database.

12. The machine-readable medium as claimed in claim 9 , having the machine-readable instruction stored thereon which, when executed by the at least one processor, causes the at least one processor to perform:
running a second simulation model of the CNC machine tool under each of the at least one set fault condition respectively to generate a second fault diagnosis database; and
using the second fault diagnosis database to correct the first fault diagnosis database.

Assignees

• Siemens Ag

Inventors

• Sun Qi
• Fu Yunhua
• Fan Shun Jie
• Roux Armin

Classifications

• G05B23/0259

  characterized by the response to fault detection · CPC title

• G06F16/2365 Primary

  Ensuring data consistency and integrity · CPC title

• G05B19/4069 Primary

  Simulating machining process on screen (G05B19/4068 takes precedence) · CPC title

• G06F16/2379

  Updates performed during online database operations; commit processing · CPC title

• G05B2219/33324

  What to diagnose, whole system, test, simulate · CPC title