SU774688A1 - Die for producing parts with bent ends - Google Patents

Description

one

The invention relates to the processing of metals by pressure, in particular to tooling for sheet metal forming.

A known stamp for rolling seams contains a die mounted on the lower plate 5 and a punch and a wedge fixed on the upper plate and interacting with the die 1.

However, it is not guaranteed on the well-known stamp that parts are obtained due to 10 sagging of the metal in the initial gap between the die and the supporting part of the plate.

The closest solution to the invention is a stamp for manufacturing bent-out parts, containing a support plate mounted on the bottom plate with a movement in the direction of the axis of the punch, a die interacting with it and a die mounted on the top plate 2 .

However, on a known stamp, parts with a loop at one end and with a straight 25 edge at the other cannot be obtained.

In order to make it possible to obtain parts with a loop at one end and a straight edge on the other stamp, it is provided with a flexible insert-30.

Cams mounted on the bottom plate and on the punch on the opposite side of the axis of the matrix slider, and on the side surface of the matrix slider, protrusions are introduced into the cavities made on the base plate.

Figure 1 presents the stamp, a general view; figure 2 is a view along arrow A in figure 1.

The stamp contains the top 1 and bottom 2 plates, the punch-clamp 3, on which the inserts for bending 4 and for seaming 5 are mounted, the clip 6 with the bending insert 7, the support plate 8 rigidly connected to the tiles 9, the slider-matrix 10 with inserts 11 mounted in guides 12, on tiles 9, as well as a wedge 13. A spring 14 is mounted in the support plate 8 fixed on the slider-matrix 10. The protrusions entering into each other are made on the lateral surface of the slider-matrix 10 and on the support plate 8 15 and valleys 16. The base plate 8 has pushers 17 in contact with the ejector press devices are assigned to them, and guide columns 18. The guide bushes 19 are installed in the ppite.

The stamp works as follows.

The blank is laid on the protrusions 15 of the plate 8 and the slider-matrix 10 and is fixed by stops (not shown). When the press crawl runs down, the poaxon presser 3 presses the workpiece to the base plate 8, the shape of the bottom of the part and the limb the straight edge through inserts 4 and 7. At the same time, slide die 10, moving the tiles 9 under the action of the wedge 13 in the direction of the die clamp 3, rolls on the second end of the workpiece loop. The presence of a shaped gap between the punch-clamp 3 and the slider-matrix 10 does not allow the workpiece to bend down.

When the press ram moves upward, the slider matrix under the action of the spring 14 returns to its original position, and the base plate 8 rises under the action of the pushers 17, making it easier to remove the part 20.

Claims (2)

1. Misterin V.T. Sheet stamping. Atlas of diagrams, M., Mashinostroenie 1975, p., 100, fig.251. 2. USSR author's certificate number 475190, cl. B 21 D 22/02, 1974.