Blanking and punching blanking and punching are blank separation process.
Blanking and punching process are exactly the same, just different purposes.
Blanking, isolated part is finished, the rest of the surrounding is waste;
Punching hole is to obtain, by punching sheet metal is finished, the separated part is waste.
Blanking and punching are collectively known as blanking.
Blanking punch and the die has a sharp edge, there are equivalent to the thickness between the punch and die - 5%
10% of the gap, in order to assure neat incision and less burr.
Bend is to make the workpiece for different shapes of corners.
Bending die on the workpiece bending part work must have the appropriate radius r, to avoid the workpiece bending crack, as shown in figure 3 -
Deep drawing, deep drawing is made cup will be flat blank or box shaped parts machining process.
Deep drawing die of the punch and die edge should be rounded to avoid artifacts is cracking.
Between the punch and die to periods of is a little bigger than the thickness of the sheet metal (
General for the thickness of 1.
In order to reduce friction.
In order to prevent fold, billet edges need clamp (
Pressure boundary circle)
Actual deep drawing process of the product will produce cracking defects, please see the sheet metal stamping die has been used to the deformation of sheet metal separation or work method.
For most of the time sheet without heating, so also called cold stamping, also referred to as 'cold blunt or stamping.
The board that commonly used for low carbon steel, stainless steel, aluminum, copper and its alloy, etc. , are they high plasticity, low deformation resistance, suitable for cold stamping processing.
Sheet metal stamping is easy to realize mechanization and automation, high production efficiency.
Stamping parts size precision, good compatibility;
Smooth surface, without mechanical processing;
Widely used in automotive, electrical appliances, instrumentation and aerospace and other manufacturing.
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