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Design Tips: General Part Design

Minimum Inside Bend Radii

gpd-min-bend-r

For Bends Perpendicular to the Grain Direction Ratio R/t

  • Soft Material, Copper Annealed, CRS .5 to 1.5
  • Medium Hard, Annealed Spring Steel 1.5 to 2
  • Tempered Material, ¾ hard Stainless >2.5
For Bends Parallel to the Grain Direction

  • Consult Material Supplier’s Guidelines

Material the 10:1 Rule

A ratio of material width to thickness of less than 10:1 presents additional challenges.

  • Material may exhibit dish. Dish is crown across the width of the material.
  • Reduces the number of potential suppliers because it is considered a difficult slit. Increases cost and decreases availability.
  • When this situation cannot be avoided evaluate the cost and suitability of using flat wire.

Part End Designs

gpd-end-designs

Hole Alignment

When two holes must be coaxial consider making one larger, or oblong.

  • This is necessary due to variations in material elongation and machine feed length.
  • As the number of bends between the holes increases so does the potential for variation.
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Design Tips Category

  • Blank Considerations
  • Design
  • Dovetails, Ribs & Gussetts
  • Fourslide
  • General Part Design
  • Material

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Case Studies

Spring Steel Clip Manufacturers

Fourslide, the Best Manufacturing Solution

Ron Johnson November 8, 2016

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Clips Manufacturers

Increasing a Customer’s Assembly Rate

Ron Johnson November 7, 2016

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