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Device for the automatic regulation of the push rods of a stamping press

  • US 4,483,173 A
  • Filed: 03/22/1982
  • Issued: 11/20/1984
  • Est. Priority Date: 04/01/1981
  • Status: Expired due to Fees
First Claim
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1. A blanking press comprising a table to which is clamped a die, a blank holder located on the table, a main slide moving vertically with respect to the table and to which is clamped a punch, a blank holder slide, at least one blank holder jack for moving the blank holder slide vertically with respect to the table, and push rods fixed by one of their ends to the blank holder and by their other ends to the blank holder slide, said push rods serving to transmit the clamping force of the blank holder slide to the blank holder, hydraulic jacks mounted on the blank holder slide and including jack rods which constitute the push rods, each of said jacks being provided with an automatic locking and unlocking device operable to automatically lock the jack rod in a fixed position when the end of the jack rod abuts the blank holder, and means at said one of the rods for high-speed locking to the blank holder.

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