3 Fundamentals of press design

Sheet metal forming lines
power requirement, increased safety against accidents and reduction of
noise at lower cost.
In the initial layouts of press lines, the large-panel transfer press was
combined with a double-action draw press (cf. Fig. 3.1.8and Fig. 4.4.28a),
meaning that the drawing technique customary on double-acting presses
was retained. The additionally required turnover device and synchronization
of the presses, however, reduced the output to approx.
12 parts per minute. In addition, due to the use of the turnover device
(cf. Sect. 3.1.3), the time required for die changing was considerably
longer. Investment, operation and space costs still substantially exceeded
those of a single-action large-panel transfer press.
Fig. 4.4.27 Large-panel tri-axis transfer press
nominal press force: 38,000kN; slides:3; work stations: 6;
feed pitch: 2,000mm; strokes per minute: 8-18
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