Device for the automatic regulation of the push rods of a stamping press
First Claim
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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Accused Products
Abstract
Process and device for the automatic regulation of the push rods of a press by means of a self-locking rod jack. The device comprises a table, a matrix, a blank holder, a main slide, a punch and a blank holder slide. Each of the push rods comprises a jack rod mounted on the blank holder slide. The jack is equipped with an automatically lockable and unlockable device for regulating the length by sensing. At their lower end, in each case the rods have means for the high-speed locking to the blank holder.
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Citations
5 Claims
- 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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5. A process for regulating the blank holder push rods of a press including 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, 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, said process comprising the steps of:
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mounting the die and blank holder on the table, lowering the blank holder slide to abut against the stamping press slide, automatically unlocking the rods of the jacks and lowering the rods until they abut against the blank holder, automatically controlling the locking of the rods on the basis of a signal detecting an increase in the hydraulic pressure of the jacks, and locking the ends of the rods on the blank holder.
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Specification