Tolerance Analysis for Non-rotational Parts. Team: Dr. X. Han, S. Yao, C. Fei Advisor: Professor Y. Rong Sponsor: NSF & Delphi Corp. Tolerance Analysis in Production Planning. Tolerance analysis - Part of setup planning - Locating error coupled with process error
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Team: Dr. X. Han, S. Yao, C. Fei
Advisor: Professor Y. Rong
Sponsor: NSF & Delphi Corp.
- Part of setup planning
- Locating error coupled with process error
- Intra- and inter- setups
- Process verification and
- Integration in CAD/CAM
In this project, the first step is studied.
= loc + tool + o + ran
N,N’ = N, A + A,N’
N, A = ran
A,N’ = ori + ran
In order to identify the factors that influence the machining errors, two steps are needed:
Tolerance within one setup:
Tolerance stackup in multi-setup:
Among the machine errors in one setup, the locating error (loc)can be calculated:
Machining feature GD&T of OP10: 101 Surface A
Theoretical fixture CS: Actual fixture CS
with given locator
The worse case caused by locator errors: 0.654
Overall machining error
Total = locating + mt + process +tool = 0.654 + 0.013 + 0.254 + 0 = 0.921 mm
mt,process and tool are given parameters.
Datum frames:X-Y-Z, XX-YY-ZZ, A-B-C, M-S-A-R
A comprehensive tolerance analysis framework is established for machining system planning and verification.
Tolerance stackup analysis has been studies for non-rotational part.
Three tolerance decomposition models are developed for intra- and inter-setup analysis.
Acknowledgement: Dr. Y. Zhang and Dr. W. Hu contributed to the earlier work of the project.