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Engineering Design

Design for Manufacturing (DFM): Bridging Design and Production

A beautiful CAD model is a liability if it cannot be manufactured efficiently. Edelweis integrates Design for Manufacturing (DFM) at the earliest stages of the geometric phase. We transform theoretical designs into "Shop-Floor Ready" assets, ensuring every part is optimized for its specific production process—reducing cycle times and eliminating costly post-processing.

1. Process-Specific Optimization

Our geometry is driven by the physics and constraints of the chosen manufacturing method:

CNC Machining
  • Tool Access: Ensuring features can be reached by standard tool lengths.
  • Fillet Optimization: Matching corner radii to standard end-mill diameters.
  • Setup Minimization: Designing for the fewest possible orientations (3-axis vs 5-axis).
Injection Molding & Casting
  • Uniform Wall Thickness: Prevents sink marks and internal stresses.
  • Draft Analysis: Ensuring proper angles (0.5° to 3.0°) for seamless ejection.
  • Gating Prediction: Positioning gates to hide defects using flow simulation.
Sheet Metal & Fabrication
  • Bend Allowance: Using K-Factor calculations for accurate flat patterns.
  • Standard Tooling: Aligning hole sizes with standard punch and die libraries.

2. DFM Technical Audits

Audit Category Optimization Focus Economic Impact
Material Yield Minimizing "nesting" waste. Lower Material Costs.
Tolerance Sensitivity Loosening non-critical dimensions. Faster Cycle Times.
Feature Complexity Eliminating deep pockets/thin walls. Reduced Scrap Rates.
Standardization Replacing custom with COTS hardware. Lower Inventory Overhead.

3. Integrated Tooling & Fixturing

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    Jig & Fixture Design: We develop custom work-holding solutions alongside part geometry for repeatable factory accuracy.
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    Poka-Yoke (Error Proofing): Incorporating physical "keys" to ensure parts can only be assembled in the correct orientation.

4. Direct-to-CAM Readiness

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    Clean Topology: Eliminating "sliver" faces or microscopic edges that cause toolpath errors.
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    MBD-Enhanced: Embedded GD&T allows automated CAM systems to select machining strategies based on required tolerances.

Technical Directives

Directive Protocol
Tooling Clearance A minimum 5° clearance cone must be maintained for all deep-pocket operations.
Standard Hardware 90% of fasteners must be selected from the Standardized Library to streamline procurement.
Surface Finish Spec Surface roughness (Ra) must be specified based on functional need, not aesthetic default.
Next Step: Learn how we simplify the factory floor's workload in Design for Assembly (DFA).