SU733797A1 - Die for drawing and shaping - Google Patents

Description

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The invention relates to the field of metal forming and can be used for deep drawing without thinning wafer thin-walled box-shaped parts with embossed molding.

A die for forming and forming is known, comprising a punch-matrix with an axial vent hole on which a ring-type puller is placed, as well as a drawing matrix, a punch of forming and an ejection unit of the finished product 1.

The disadvantage of this stamp is the impossibility of automatic -. the removal of the finished product from the die zone, since the product is pushed out by the lower ejector installed in the die below its working plane.

The purpose of the invention is to facilitate the removal of the finished product from the die zone.

To achieve the goal, the ejection unit is placed in a radial hole made in a punch-matrix, and is a sleeve in which a spring-loaded slider is placed, moves in a radial direction by a press-remover and carrying a ball that blocks the vent hole of the punch matrix.

FIG. 1 shows the staples in the working position; in fig. 2 - the same

5 at a position corresponding to the start of the removal of the part from the stamp area; in fig. 3 is the same in the original position.

The stamp consists of a stretch matrix 1, made in the form of a glass, where a punch 2 of relief molding and a buffer device consisting of plates 3 and an elastic strip 4 are mounted in the bore of the bottom. Punch 5

15 stretch mounted on a slider of a double-action hydraulic press, on its end working surface has a figured bore A, which is a matrix of embossed molding. A hole B is made on its side surface, into which the sleeve 6 is pressed. In the sleeve is mounted a check valve consisting of the ball 7, a flat spring 8. The ball is connected to the slide 9, on which the tip 10 is fixed. Under the action of the spring 11, the slide 9 interacts with a bevel B of the puller 12, controlled by blocking the vent hole G,

which removes air from the cavity D of the formable article 13,

The operation of the stamp is carried out as follows.

The blank of the item to be stamped 13 is installed in the die 1 and the stripper 12 is pressed against it. When the punch 5 moves down, the drawing is pulled out and the relief molding of its bottom along profile A. In the process of drawing and relief forming, the tip 10 of the polisher 9 contacts the inner surface of the pressing puller 12, whereby the vent hole G remains open and the air from the cavity of the product being forged is freely released outside. At the completion of the stamping, due to the bevel B on the clamper 12, the slider 9 under the influence of the spring 11 moves to the right and the ball 7 blocks the opening G,

Then the press-puller 12 with the cross-beam of the press on which it is attached, moves up to a height h. After that, the raising of the punching matrix 5 begins. In the initial period of movement of the punching matrix 5 upwards due to friction forces between the working surface of the die 1 and the outer surface of the stamped product 13, the latter moves along the punching matrix 5 and as a result, a vacuum is created in the vacated part of cavity D of part 13 (vacuum). .

The further upward movement of the die 5 is combined with the movement of the stamped product. The nx joint movement part is determined by the height hg,

With a further rise of the punch 5, the tip 10 of the slider 9 interacts with the bevel B of the puller 12. as a result of the slider. 9 moves to the left together with the ball 7 and the opening D opens again. The pressure in the cavity D of the product 13 becomes equal to the atmospheric pressure. When the lower end of the pressing-puller 12 contacts the upper end of the stamped product 13, their relative displacement begins.

The stamping cycle is then repeated. By combining the extrusion and relief molding in one operation, as well as the automatic removal of the stamped part by removing it from the punching area using the upward punch-die using clamping as a puller, labor productivity is more than doubled.

Claims (1)

1. Ehler, Kaiser, Cutting, bending and drawing dies, Mashgiz, 1961, p. 298-300, FIG. 248,