Procesos de formado de hojas metálicas

Sheet-Metal Forming Processes

Corte Mecánico

Shearing

Schematic illustration of shearing with a punch and die, indicating some of the process variables.

TLUTSF 7.0 Punzonado y doblado

Characteristic features of (b) a punched hole and (c) the slug. Note that the scales of the two figures are different.

Shearing Operations

Figure 16.4 (a) Punching (piercing) and blanking. (b) Examples of various shearing operations on sheet metal.

Troquelado y doblado Fabricación de un serrucho

Shaving and Shear Angles

Figure 16.9 Schematic illustrations of the shaving of a sheared edge. (a) Shaving a sheared edge. (b) Shearing and shaving, combined in one stroke.

Figure 16.10 Examples of the use of shear angles on punches and dies.

Fine Blanking

(a) (b)

Figure 16.5 (a) Comparison of sheared edges produced by conventional (left) and by fine-blanking (right) techniques. (b) Schematic illustration of one setup for fine blanking. Source: Feintool U.S. Operations.

Navajas

Compound and Progressive Die

Figure 16.11 Schematic illustrations: (a) before and (b) after blanking a common washer in a compound die. Note the separate movements of the die (for blanking) and the punch (for punching the hole in the washer). (c) Schematic illustration of making a washer in a progressive die. (d) Forming of the top piece of an aerosol spray can in a progressive die. Note that the part is attached to the strip until the last operation is completed.

(a) (b) (c)

(d)