How does DTAS 3D simulate profile accuracy and allow for flexible switching between different standards for profile tolerance?

Accurate Profile Tolerance Simulation in DTAS 3D Starts Here

Define your profile tolerances and set up a robust datum system—the foundation of reliable tolerance analysis.

Profile Tolerance — Boundary Range Defined by the Actual Shape

Key Focus

1.Control Function

A comprehensive geometric control that can simultaneously constrain size, position, orientation, and form.

2.Datum Relationship
May be datum‑related (for position/orientation control) or datum‑independent (for form control only).

3.Application Scope
Applicable to surfaces, curves, or entire parts—including planes, cylinders, cones, free‑form surfaces, and cross‑sectional profiles.

Tolerance Zone Shape Types for Profile Tolerances

The image illustrates a datum scheme with:

•Two‑sided profile zone 

•ASME U‑zone (unilateral)

 •ISO UZ‑zone (unequally disposed)

Procedure in DTAS 3D:

1. Select tolerance standard (e.g., ASME).

2. Define datum systems (A, B, C) and apply a profile tolerance (shown as a U‑circle).

3. Run simulation: green datum‑simulation bodies are auto‑fitted based on datum‑feature tolerances, with the profile following the part surface.

4. Switch standard to ISO: notation updates to UZ automatically.

5. Re‑run simulation: datum bodies adapt while profile remains aligned with the surface.

Conclusion

DTAS 3D accurately models datum‑based profile tolerances per ASME/ISO, ensuring a valid basis for variation analysis.

This case demonstrates that DTAS3D's profile establishment and tolerance simulation are accurate, thus providing a solid foundation for subsequent simulation analysis.

Summary

DTAS 3D provides comprehensive profile tolerance support across ASME, ISO, and GB standards.

•Supports two‑sided and unidirectional/asymmetric profile tolerance zones. 

•Enables visualization of tolerance‑zone shapes in 3D for clear validation.