Sheet Metal Stamping Deep Drawn Fabrication
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Sheet Metal Stamping Deep Drawn Fabrication

The total drawing load consists of the ideal forming load and an additional component to
 
 compensate for friction in the contacting areas of the flange region and bending forces 
 
as well as unbending forces at the die radius. The forming load is transferred from the punch
 
 radius through the drawn part wall into the deformation region (sheet metal flange).
 
 In the drawn part wall, which is in contact with the punch, 
 
the hoop strain is zero whereby the plane strain condition is reached. In reality, 
 
mostly the strain condition is only approximately plane. 
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The total drawing load consists of the ideal forming load and an additional component to compensate for friction in the contacting areas of the flange region and bending forces as well as unbending forces at the die radius. The forming load is transferred from the punch radius through the drawn part wall into the deformation region (sheet metal flange). In the drawn part wall, which is in contact with the punch, the hoop strain is zero whereby the plane strain condition is reached. In reality, mostly the strain condition is only approximately plane. Due to tensile forces acting in the part wall, wall thinning is prominent and results in an uneven part wall thickness, such that the part wall thickness is lowest at the point where the part wall loses contact with the punch, i.e., at the punch radius.

Over 10 years experience in metal stamping and deep drawing, equipped with 50t to 315t punching machine and 100t to 1000t  presses to work with a processing accuracy up to 0.01 mm.To ensure our stamped components are as consistent as possible, we perform very strictly QC inspection.Our ISO 9001 registered quality system assure you defect-free stamping parts with the tight tolerances you need at high volume production rates.

sheet metal stamping deep drawn fabrication


Workpiece materials and power requirements

Softer materials are much easier to deform and therefore require less force to draw. The following is a table demonstrating the draw force to percent reduction of commonly used materials.


Drawing force required for various materials and reductions

Material

Percent reduction

39%

43%

47%

50%

Aluminium

88

101

113

126

Brass

117

134

151

168

Cold-rolled steel

127

145

163

181

Stainless steel

166

190

214

238



BENEFITS

Deep drawn stampings are often stronger and more cost effective than components manufactured using alternative manufacturing processes.

Complex component designs can be achieved through deep drawn stamping on progression and transfer tooling, often negating the need for secondary operations.







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