SU1442319A1 - Hammer die for die forging of bent elongated forgings - Google Patents

Abstract

The invention relates to the processing of metals by pressure, in particular to the design of hammer dies. The purpose of the invention is to increase punching productivity and reduce the labor intensity of stamp manufacturing by eliminating the need for a bending creek. The stamp has a forming and continuous streams. The passing threshold of the stretching creek has a wedge located perpendicular to the axis along the wedge side deforming it. The maximum depth of the latter is greater than the depth of the rest of the span. The wedge section smoothly adjoins along the arc of a circle with the rest of the long threshold. When the workpiece is drawn, the workpiece is simultaneously bending. 4 il.

Description

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The invention relates to the field of metal forming and can be used in forging and stamping production when stamping on hammers of forgings of the type of levers.

The purpose of the invention is to increase the stamping capacity and reduce the labor intensity of stamp manufacturing by eliminating the need for a bending creek.

Figure 1 shows the stamp, a general view; Fig. 2 shows the lower half of the punch with stretched and molding creeks, above and above; figure 3 - section aa in figure 2; figure 4 - type B in figure 2.

The molot die for die forging levers with a curved axis contains (Figures 1 and 2) the lower 1 and upper 2 halves. At each of the halves there is a stretching creek 3, located at an angle to the axis of the punch, and a molding creek 4. The stretching creek contains a stretching threshold (figure 4), which consists of two sections: the usual 5 with a horizontal surface and

wedge (inclined) 6. Maximum, - to the depth of the wedge section about

hard threshold in relation to the plane of contact between the halves of the stamp, i.e. to the stamp mirror, it exceeds the depth of section 5 (Fig. 3), and at this deepest point the wedge section 6 is adjacent to section 5 along an arc of a circle of radius g not exceeding the radius of the original billet subjected to stretching and bending.

The stamp works as follows. At the first and every odd blows in section 5, a cylindrical billet is drawn. Before the second and every even impact, the billet is turned 90 ° always in the same direction and shifted to section 6, where the billet of the billet is stretched, because at the moment of deformation of the wedge section of the stretch threshold with inclined surfaces - vyvat more internal. After each

After a single blow, the billet is turned 90 in the opposite direction and placed on the section 5 of the long threshold. Thus, in the case of an odd impact, a stretch occurs, and in the case of an even impact, a stretch with a bend of the workpiece occurs in the horizontal plane. After 6-7 strokes, the outstretched and curved billet is transferred to the forming stream 4.

The interface radius g of sections 5 and 6 (Fig. 3) must not exceed the radius of the initial cylindrical workpiece, since with a larger interface radius, the workpiece is squeezed out of the wedge section 6, i.e. the interface is a brake in the deformation process.

Thus, the proposed die ensures that the stamping performance is improved by combining the processes of stretching and bending of the workpiece, and also reduces the laboriousness of its manufacture by eliminating the need for a bending stream.

Claims (1)

Invention Formula A molotovy die for die forging of curved elongated forgings consisting of two halves whose working surfaces form a forming brook and a stretching brook with a stretching threshold, so as to increase the stamping performance and reduce the labor intensity of stamp manufacturing by eliminating the need in a bending creek, the passing threshold has a wedge deformed section, perpendicular to the axis of the creek, on the side of it, the wedge deformed section, the maximum depth of which is relative to the plane with touching the half of the punch exceeds the depth of the rest of the partial threshold, and the wedge section in its deepest zone smoothly adjoins along the arc of a circle with the rest of the stretching stream. H FI.1 fug.2 F1 / g.Z. FIG.