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[CN 201910142136.9] drawing die, double-acting press and drawing die switching method
[CN 201910142136.9] Title of drawing die, double-acting press and drawing die switching method: drawing die, double-acting press and drawing die switching method application number: CN 201910142136.9 applicant: Chery Automobile Co., Ltd. Application Date: 2019-2-26 Patent Type: Invention Application The present invention discloses a drawing die, which relates to the field of mechanical processing. The drawing die includes a punch, a flange ring, a female die and a pressing component, by setting a pressing component at the overlapping part between the blank holder ring and the punch, the pressing component is pressed before the punch contacts the blank, and the pressure of the pressing component is transmitted to the pressing surface of the female die through the blank holder ring. During the entire punch forming process, the pressing component always maintains a pressed state and can provide a blank holder force, thereby controlling the uniform feeding of the blank and avoiding wrinkling defects. At the same time, because the pressing component is arranged at the overlapping part between the blank holder ring and the punch, when the punch and the female die are closed, the spacing distance between the punch and the blank holder ring is reduced, triggering the pressing of the pressing component to provide the blank holder force. When the punch and the female die are separated, the spacing distance between the punch and the blank holder ring is increased, the pressing component is loosened, the blank holder force is removed, and no debugging is required, thus improving the production efficiency.
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