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COMPOUND DIES AND CUT AND CARRY OR PUSH BACK OPERATIONS The term compound die usually refers to a one-station die, designed around a common vertical centerline, in which two or more operations are completed during a single press stroke. Usually, only cutting operations are done, such as combined blanking and piercing. A common characteristic of compound-die design is the inverted construction, with the blanking die on the upper die shoe and the blanking punch on the lower die shoe. The pierced slugs fall out through the lower die shoe. The part or finished blank is retained in the female die, which is mounted on the upper shoe. Cut-and-carry operations are very useful for producing parts with high flatness requirements. The cutting station in cut-and-carry dies is normally an upside-down compound die. The part is cut and then pushed back into the carrier strip rather than ejected. The feature of pushing the part back into the carrier strip or scrap skeleton provides a positive means to get the part out of the die without an auxiliary unloading means required with a conventional compound die. Cut-and-carry operations are useful stations in progressive dies. Download the Copyrighted PDF document 270 KB
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