Stabilizer of drawing die and stabilizer unit of the same

Abstract

An object of the invention is to standardize a stabilizer of a drawing die, to easily manufacture and to achieve a cost reduction. The invention provides a stabilizer of a drawing die that includes a punch, a blank holder outside fitted to the punch and supported by a cushion pin and provided so as to freely move upward and downward, and a die arranged so as to face to the punch and moves upward and downward, and with which a thin plate mounted on the blank holder moved upward by the cushion pin and pinched between the blank holder and the die by moving the die downward is drawn by the punch, wherein a plurality of boxes are arranged around the blank holder between the cushion pin and the blank holder so as to be freely moved upward and downward by the cushion pin, a buffer gas spring is interposed between the boxes and the blank holder so as to form a run-up gap of the blank holder between the boxes and the blank holder, a run-up lever pressing the blank holder so as to make the blank holder run up before the die comes into collision with the thin plate on the blank holder is rotatably provided in the boxes, and a driver driving the run-up lever is arranged at a position facing to the run-up lever of the die, whereby the die comes into collision with the thin plate on the blank holder after the blank holder runs up.

Description

BACKGROUND OF THE INVENTION [0001] The present invention relates to a stabilizer of a drawing die and a stabilizer unit of the same. [0002] A known drawing die is shown in FIG. 5. [0003] The drawing die is constituted by a punch 101 positioned at the center, a blank holder 103 outside fitted to the punch 101, supported by a cushion pin 102 and provided so as to freely move upward and downward, and a die 104 arranged so as to face to the punch 101 and moving upward and downward. Reference numeral 105 denotes an air vent. [0004] A lower die 109 constituted by the punch 101 and the blank holder 103 is fixed to a bolster 106 of a press machine, an upper die 110 constituted by the die 104 is fixed to a ram 107 of the press machine, and the upper die 110 is moved upward and downward by driving the press machine. Further, the blank holder 103 is supported by the cushion pin 102, the cushion pin 102 is moved upward and downward by a cushion apparatus of the press machine, and accordingly, t...

AI Technical Summary

Benefits of technology

"The present invention relates to a stabilizer for a drawing die, which is used in a press machine to prevent impact and noise during the drawing process. The stabilizer includes a punch, a blank holder, and a die. A thin plate is mounted on the blank holder and is pinched between the blank holder and the die when the die moves downward. The thin plate is drawn by the punch when the die moves upward. The stabilizer also includes a plurality of boxes that move upward and downward by a cushion pin, a buffer gas spring, and a run-up lever. The invention aims to make the impact generated during the drawing process as small as possible, improve the quality of the processed product, and increase the service life of the drawing die and the press machine."

Problems solved by technology

Further, a service life of the press die and the press machine is shortened due to the impact process.

Further, at a time of executing the drawing process, a loud noise is generated at a time when the upper die and the lower die come into collision.

Further, when the blank holder finishes the upward movement after the drawing process is executed, a vibration is generated in the work on the blank holder.

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