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Sheet Metal Forming Processes
Manufacturing Processes
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Outline Introduction Shearing Blanking Bending Deep Drawing
Stamping Dies Progressive Dies Transfer Dies Spinning
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Sheet Metal Working Products: automotive fenders washers stamped parts
channels
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Examples of Stamped Parts
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Examples of Stamped Parts
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Examples of Stamped Parts
This part was made from several stamped parts plus a nut, which were stamped again to seal them together
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Examples of Stamped Parts
This part was made from a sheet that was stamped, bent, and welded into a tube, plus a separate stamped end piece
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Examples of Stamped Parts
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Shearing A sheet-metal cutting operation along a straight line between two cutting edges
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Shearing of Metal Between Cutting Edges
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Shearing of Metal Between Cutting Edges
1/3 of material is cut and 2/3 of material fractures
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Blanking Involves cutting the sheet metal along a closed outline
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Piercing and Blanking Shearing operations in which the shear blades are closed, curved lines along the edges of the punch and die In blanking, the piece punched out is the workpiece; in piercing, the remaining strip is the workpiece
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Punch and Die
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Bending
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Bending
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Bending Springback
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Deep Drawing A sheet metal forming operation used to make hollow-shaped parts
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Deep Drawing
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Redrawing Additional drawing steps (redrawing) may be required if the shape change of the material is too severe
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Example of a Drawn Part
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Example of a Deep Drawing Press
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Stamping Die
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Stamping Die
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Progressive Die Performs multiple operations at different stations with every press stroke
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Progressive Die
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Example of Progressively Stamped Parts
This sheet has been stamped by a progressive die, showing the series of operations from right to left
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Progressive Die
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Progressive Die
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Progressive Die
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Progressive Die
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Progressive Die
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Progressive Die
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Examples of Stamping Machines
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Progressive Die in Stamping Press
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Progressive Die
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Material Coils
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Material Feed
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Material Feed
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Transfer Line
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Transfer Line
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Transfer Line
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Transfer Line
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Transfer Press
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Transfer Press
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Transfer Die
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Spinning Uses a spinning mandrel and a roller to form sheet metal into a radially symmetrical part
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Courtesy Koch Metal Spinning
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Tube Spinning Uses a spinning mandrel and a roller to reduce the wall thickness and increase the length of a tube
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Summary Blanking, bending, and deep drawing are capable of producing an immense variety of thin metal parts Progressive dies can produce parts at high production rates by performing multiple operations simultaneously
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