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Book Chapter

Fine-Edge Blanking

By T.C. Lee, C.Y. Tang, L.C. Chan

Book: Metalworking: Sheet Forming

Series: ASM Handbook

Volume: 14B

Publisher: ASM International

Published: 01 January 2006

DOI: 10.31399/asm.hb.v14b.a0005110

EISBN: 978-1-62708-186-3

... Abstract Fine-blanking is a hybrid metal forming process that combines the technologies of stamping and cold extrusion. This article describes the three principal design features of the fine blanking process: the vee-ring, clearance between punch and die, and counterforce imposed by the ejector...

Abstract

Fine-blanking is a hybrid metal forming process that combines the technologies of stamping and cold extrusion. This article describes the three principal design features of the fine blanking process: the vee-ring, clearance between punch and die, and counterforce imposed by the ejector. It discusses the advantages and disadvantages of edge blanking and materials. The article reviews the classification of fine-blanking dies such as the moving-punch system and the fixed-punch system, and provides information on the mechanical and hydraulic fine-blanking presses.

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Main differences between conventional blanking and the fine-blanking proces...

in Fine-Edge Blanking > Metalworking: Sheet Forming

Published: 01 January 2006

Fig. 4 Main differences between conventional blanking and the fine-blanking process More

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Lubricant pockets developed in fine blanking by use of appropriately shaped...

in Selection of Materials for Shearing, Blanking, and Piercing Tools > Metalworking: Sheet Forming

Published: 01 January 2006

Fig. 12 Lubricant pockets developed in fine blanking by use of appropriately shaped tools More

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A complete fine-blanking process. (a) Strip stock is fed into position when...

in Fine-Edge Blanking > Metalworking: Sheet Forming

Published: 01 January 2006

Fig. 3 A complete fine-blanking process. (a) Strip stock is fed into position when the tool is open. (b) Pressure is applied, closing the tool and embedding the vee-ring (also called stinger plate) into the stock. This prevents the material from flowing away from the punch, thus aiding More

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Three main characteristics of fine blanking

in Fine-Edge Blanking > Metalworking: Sheet Forming

Published: 01 January 2006

Fig. 5 Three main characteristics of fine blanking More

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Flow diagram to determine the feasibility of a fine-blanking process. Sourc...

in Fine-Edge Blanking > Metalworking: Sheet Forming

Published: 01 January 2006

Fig. 9 Flow diagram to determine the feasibility of a fine-blanking process. Source: Ref 1 , Ref 2 , Ref 3 More

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Edge quality comparison. Top: Fine-blanking: Full shear, 50 RMS; less than ...

in Fine-Edge Blanking > Metalworking: Sheet Forming

Published: 01 January 2006

Fig. 11 Edge quality comparison. Top: Fine-blanking: Full shear, 50 RMS; less than 1° tape. Bottom: Conventional stamping: up to 80% die break; taper as great as 30° More

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Complex shapes achieved by the fine-blanking process

in Fine-Edge Blanking > Metalworking: Sheet Forming

Published: 01 January 2006

Fig. 12 Complex shapes achieved by the fine-blanking process More

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A sample two-dimensional part made by fine-blanking

in Fine-Edge Blanking > Metalworking: Sheet Forming

Published: 01 January 2006

Fig. 14 A sample two-dimensional part made by fine-blanking More

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Examples of coated fine-blanking tooling

in Fine-Edge Blanking > Metalworking: Sheet Forming

Published: 01 January 2006

Fig. 21 Examples of coated fine-blanking tooling More

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Mechanical fine-blanking press

in Fine-Edge Blanking > Metalworking: Sheet Forming

Published: 01 January 2006

Fig. 23 Mechanical fine-blanking press More

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Mechanical fine-blanking press

in Fine-Edge Blanking > Metalworking: Sheet Forming

Published: 01 January 2006

Fig. 24 Mechanical fine-blanking press More

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Ram stroke during fine-blanking in a mechanical press

in Fine-Edge Blanking > Metalworking: Sheet Forming

Published: 01 January 2006

Fig. 25 Ram stroke during fine-blanking in a mechanical press More

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Hydraulic fine-blanking press. (a) Schematic (b) photo of modern hydraulic ...

in Fine-Edge Blanking > Metalworking: Sheet Forming

Published: 01 January 2006

Fig. 26 Hydraulic fine-blanking press. (a) Schematic (b) photo of modern hydraulic fine-blanking press More

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Fine-blanked parts (a) assembled as the main components of an automatic car...

in Fine-Edge Blanking > Metalworking: Sheet Forming

Published: 01 January 2006

Fig. 1 Fine-blanked parts (a) assembled as the main components of an automatic car window. (b) Other fine-blanked parts More

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Die roll and burr in fine-blanked parts. R , corner radius; α, corner angl...

in Fine-Edge Blanking > Metalworking: Sheet Forming

Published: 01 January 2006

Fig. 15 Die roll and burr in fine-blanked parts. R , corner radius; α, corner angle; a , die roll width; b , die roll height; c , burr height; d , burr width; S , material thickness. Source: Ref 3 More

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Fine-blanked central gears of car seat adjuster

in Fine-Edge Blanking > Metalworking: Sheet Forming

Published: 01 January 2006

Fig. 28 Fine-blanked central gears of car seat adjuster More

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Fine-blanked disk brake for motorcycles

in Fine-Edge Blanking > Metalworking: Sheet Forming

Published: 01 January 2006

Fig. 29 Fine-blanked disk brake for motorcycles More

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Fine-blanked components for computer hard drives

in Fine-Edge Blanking > Metalworking: Sheet Forming

Published: 01 January 2006

Fig. 30 Fine-blanked components for computer hard drives More

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Typical tooling setup for fine-edge blanking of a simple shape

in Blanking and Piercing > Metalworking: Sheet Forming

Published: 01 January 2006

Fig. 25 Typical tooling setup for fine-edge blanking of a simple shape More

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