DRAGON INNOVATION, INC. !

DESIGN  FOR  MANUFACTURING  !

COURSE 8: PART 2 - STAMPING !!!!!!!

SCOTT N. MILLER | CEO | @DRAGONINNOVATE | WWW.DRAGONINNOVATION.COM

•Overview •Process •Part Design •Materials

AGENDA

Stamping Overview

Typical Stamped Parts

• Brackets

• Deep Draw Containers

• Fittings

Stamping Advantages

• Suitable for high volume production • Short cycle times • Cost effective components

• Feature integration • High precision • Can create large components

Stamping Disadvantages

• Tooling is expensive with a long lead-time • Difficult to make changes or prototype • Limited to metals • Limited by ductility of the material • Stamped edge rough finish

Stamping Process

Stamping Process

• Processes: - Stretch - Compress - Form - Bend - Cut - Pierce

• Features: - Lance - Depression - Flange - Hem - Emboss

Punching Example

Stamping Action

https://www.youtube.com/watch?v=2ph3AOxvcR4

Progressive Die Stamping

https://www.youtube.com/watch?v=tISCf9WmRzw

Deep Draw

https://www.youtube.com/watch?v=n0s_UEwC43U

Stamping Part Design

Design Guidelines

• Use parallel edges if possible. • Avoid narrow sections and small holes (weak tool).

– Hole diameter >20% stock thickness. For SS, use 2x. – Notches and tabs: W > 1.5T, L < 5T

• Thickness between 0.1 mm - 16 mm • Use planes, cylinders or cones in bend area. • General rule: Inside bend radius equal to material

thickness. For 6061, use 6x material thickness. • Parts will lengthen during bending due to plastic

deformation. Look up “K” factor for more info.

Edge Distortion

Flanges

• Min width > 2.5T + R

2.5T  +  R

Edge Holes

• Distance between hole and edge > 2T

If  <  2T

Displacement

Cut  Slot,  or  Add  Arch

Bend Relief

• Steel: A366 • Stainless: 304 & 316 • Aluminum: 3003-H14 & 5052-H32

Common Materials

dragon@dragoninnovation.com