High Strength Steel Stamping Design Manual - Auto/Steel Partnership

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Section 3 – Die Process Planning Guidelines for High Strength Steels LWR. PAD POST Sketch #3 – Form Die-Draw Action (Lower Pad) Page 34 LWR. PAD WORK TRAVEL AIR, NITROGEN OR HYDRAULIC CYLINDERS (NOT TO SCALE) Contoured parts with compression flanges will require a lower pressure pad to control buckling in areas of metal compression. Part contours in the plan view or elevation can cause metal compression during the forming process. Buckling due to metal compression increases with higher strength steels. This process is sometimes referred to as a “draw-action” form die. Post radii should be small, but flange radii may need to be slightly larger for higher strength grades when using this process. An oversized radius will increase sidewall curl.
WORK TRAVEL UPR. PAD Section 3 – Die Process Planning Guidelines for High Strength Steels LWR. PAD UPR. PAD POST Page 35 LWR. PAD Sketch #4 – Form Die-Draw Action (Upper and Lower Pads) WORK TRAVEL LWR. PAD AIR, NITROGEN OR HYDRAULIC CYLINDERS (NOT TO SCALE) For high strength steel parts with more complex geometry, a die process using upper and lower pads may be required. A lower pad delayed return system must be employed with this two-pad process in order to avoid upstroke deformation of the part. This can be done with hydraulic cylinders, nitrogen cylinders (Delayed Return and Control or DRAC type) or a mechanical pad lock-down device. Post radii should be small to reduce spring back on walls. Flange radii may need to be slightly larger.
Page 1 and 2: AK Steel Corporation Bethlehem Stee
Page 3 and 4: Table of Contents Introduction . .
Page 5 and 6: Executive Summary The importance of
Page 7 and 8: Section 1 - Material Characteristic
Page 15 and 16: Manufacturing Process Product Desig
Page 17 and 18: Section 2 - Product Design Guidelin
Page 19 and 20: DOOR OUTER PANEL 100% 90% Section 2
Page 27 and 28: Section 3 - Die Process Planning Gu
Page 31: Sketch #2 - Form Die (Upper Pad) Se
Page 35 and 36: LOCK STEP Section 3 - Die Process P
Page 41 and 42: Section 4 - Die Design and Construc
Page 43 and 44: 1 2 STIFFENING DART Section 4 - Die
Page 45 and 46: Section 5 - Die Tryout Guidelines f
Page 49 and 50: Section 6 - Glossary and Case Studi
Page 67: Section 6 - Glossary and Case Studi

High Strength Steel Stamping Design Manual - Auto/Steel Partnership

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