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Math Data Validation and Auto-Correction at GM using NX Check-Mate. Ubaid U Rehman General Motors. Abstract. This presentation will discuss: The usage of Check-Mate profiles for checking CAD data for conformance to GM Math Data Quality (GM MDQ) and Drafting Standards, and
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Ubaid U Rehman
This presentation will discuss:
The usage of Check-Mate profiles for checking CAD data for conformance to GM Math Data Quality (GM MDQ) and Drafting Standards, and
If non-conformances occur, then auto-correct the non-conformances using GM Standards
Check-Mate as globally agreed upon CAD validation tool
Successfully implemented Check-Mate at all GM Global Sites
Enforced 53 Check-Mate Checkers as part of GM workflow
Check-Mate used as CAD Data Assessment Tool
More than 200,000 NX parts assessed weekly using check-mate batch mode
Significant improvement in Math data quality
GM wastes time and money every year due to rework of improper data quality of it’s math files
A large percentage of these problems are caused by non-conformances to GM Math Data Quality (GM MDQ) and Drafting Standards
GM is using NX Check-Mate checkers and profiles to check CAD data quality for their adherence to GM standards
Checkers compare the math model to standards and report details that are out of standards
After error detection, issues are fixed manually
Manual corrections still cost time and, hence, money
Custom Inquire Tool is used
For searching different object types
To get object information
To move objects to different layers
Currently considering combining validation and error corrections in one tool
Check-Mate or separate auto-correction tool?
Eliminate running multiple tools (Inquire and Preparation Tool)
Maintain and enhance one tool only
But with auto-corrections, there is always a big question:
What is safe to auto correct?
Design-critical geometry that can affect the design intent of the original model
Auto-correcting draft on ribs
Solid Body Physical Properties
Auto midsurface generation
Product and Manufacturing related
GM’s strategy for auto-corrections:
For low risk errors
Check-Mate checkers will be allowed to fix problems automatically, with intervention from a designer
For high risk errors
Manual corrections to make sure changes won't affect design intent