SU588053A1 - Open die set for volumetric stamping - Google Patents

Description

one

The invention relates to dies for hot-die forging and can be used to produce stamped forgings with a burr on the stamping equipment, in particular on crank presses.

A die for stamping forgings with burr is known, containing upper and lower parts with working engravings, a hollow groove and magazine 1.

The known stamp does not provide a reliable ejection of forgings with small punching slopes, the necessary increase of which leads to an increased consumption of metal for the forging.

In addition, in the presence of pushers, the die structure is weakened.

In the proposed stamp, in order to reduce the consumption of metal for forging by reducing stamping gradients and improving the conditions of ejection of the forging from an engraving, one of the parts of the stamp is equipped with L-shaped hooks for oblo fixed in it, the other ends of which are placed in another part of the stamp in These radial grooves adjacent to the store.

For forming axially symmetric and round forgings, the clamps are fixed on the matrix one by one in two diametrically opposite places.

For stamping axisymmetric and round forgings, the clamps can be attached to the punch one at a time in two diametrically opposite locations.

For stamping elongated forgings, the grips can be fixed either on the die along one, for example, the long side of the forging, or on the die along one, for example, the long, side of the forging.

FIG. 1 shows the proposed die for die forging round in-strip forgings with a burr, cross section; in fig. 2 is a section A-A in FIG. one; in fig. 3 — die for die forging of elongated forgings with burr, cross section; in fig. 4 is a section BB in FIG. 3

The stamp contains the working tool-punch 1 and the matrix 2, in which the grooves of the cavity 3 are made, adjacent to the store 4 of the interlocking groove. At the nostrils, clamps 5 are placed for turning around 6 of the forging 7. Depending on the configuration of the forging, one or several cavities 3 and, respectively, one or several grips can be made in the die. The grips are rigidly fixed on the Iuanone, if the jamming of the forging occurs in the engraving of the matrix, or on the matrix, if the jamming of the forging occurs in the engraving of the punch. In the punch of FIG. 1 and 2 punch for stamping round forged forgings made two diametrically located cavities 3 and in them are two grippers attached to the matrix. In this stamp it is possible to make one cavity and install one grip.

Perhaps, as shown in FIG. 3 and 4 in the stamp for stamping elongated forgings, making several (two or more) hollows located along one (long) side of the forging and abutting them, to the store groove groove.

Grips can be attached to the punch (see. Fig. 3) or on the matrix (see. Fig. 1).

Each grip is L-shaped and placed in the cavity so that its end with appendix 8 is directed towards the part of the engraving from which the forging is most difficult to extract, for example towards the deeper part of the engraving in the stamp.

The stamp works as follows.

After receiving the workpiece (by cutting metal or preforming), the latter is placed in the matrix 2. Under the influence of the punch, the workpiece is deformed, as a result of which a peak is obtained with a burr. During the return stroke of the crank press, i.e., at the first moment of raising the ram, the forging is removed from that part of the stamp engraving in which the forging is held least firmly by friction force, for example, from the less deep part of the engraving. With a further rise of the punch, the process 8 of the grip either prevents the rise of the burr and forgings together with the punch, if the grips are fixed on the die, or raises the breaks and the forging, removed it from the die, if the grips are fixed on the punch. Ultimately, this leads to the extraction of forgings from both the die and the punch. The forging is then removed from the die zone to the container.

In the described stamp design, an extrusion system of a known construction can be additionally applied, but with less pushing force.

Facilitating the extrusion of the forging allows forging in the open die of forgings with reduced forging gradients, which reduces metal consumption and breaks the die design in the event of failure to use the extrusion system of a known construction.

Claims (1)

1. Technological reference for forging and die forging, ed. M. V. Storozheva, M., 1959, p. 456, FIG. 64. S -B FIG. four