Shirsh
Automotive ComponentsHeavy Machinery & Industrial EquipmentHVAC & Thermal Systems

Parametric CAD & 3D Modeling

Precision parametric CAD services — from concept modeling and legacy drawing conversion to simulation-ready geometry preparation.

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Parametric CAD & 3D Modeling
Overview

What this solution covers

Our CAD practice is the geometric backbone of every simulation engagement. We deliver production-quality SolidWorks models with full parametric design intent, preparing geometry that feeds directly into FEA and CFD workflows without manual rework.
The problem

Pain points we address

Legacy products exist only as 2D drawings or physical samples with no digital CAD model

CAD models from design teams contain features that cause meshing failures in FEA/CFD

No parametric design intent — geometry changes require manual rebuild rather than parameter updates

Multi-CAD environments create translation errors when importing STEP/IGES files

Our answer

What we solve

Full parametric 3D modeling from 2D drawings, sketches, or reverse-engineered scan data

Geometry cleanup and defeaturing for simulation-ready mesh generation

Mid-surface extraction from solid bodies for shell-element FEA modeling

Design table-driven configurations for parametric variant generation

Methodology

Our approach, step by step

1
Requirements review: understand downstream use case (manufacturing drawing, FEA prep, CFD domain, or visualization)
2
Modeling strategy: define feature tree structure, datum planes, and design intent for parametric flexibility
3
Modeling execution: build fully constrained SolidWorks parts and assemblies following best-practice feature sequencing
4
Simulation preparation: defeature, extract mid-surfaces, create named selections, and export in target format (Parasolid, STEP, native .sldprt)
5
Quality check: verify model integrity with SolidWorks Geometry Analysis and confirm mesh compatibility with target solver
What you get

Deliverables

  • Native SolidWorks part (.sldprt) and assembly (.sldasm) files with full parametric history
  • GD&T-compliant 2D manufacturing drawings (.slddrw) where required
  • Defeatured and mid-surfaced geometry ready for FEA import
  • Fluid volume extraction for CFD domain definition
  • Design table spreadsheet for parametric configuration management
Impact

Expected outcomes

Simulation-ready geometry delivered in hours rather than days of manual cleanup

Parametric models enabling rapid design variant exploration without rebuild

Digital archival of legacy products as fully associative 3D CAD with manufacturing drawings

Consistent CAD quality standard across multi-engineer project teams

Why us

Why Shirsh

CAD quality determines simulation quality. Our modelers are trained not just in SolidWorks operations, but in the downstream requirements of FEA meshing and CFD domain extraction. Every model we deliver is built with simulation intent — clean topology, named selections, and appropriate defeaturing — eliminating the geometry cleanup bottleneck that plagues most analysis projects.

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Related insights

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A practitioner's decision framework for determining when embedded CAD simulation reaches its limits and a dedicated FEA platform becomes essential.

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