SU979009A1 - Die for forming articles such as panels - Google Patents

Description

The invention relates to the processing of metals by pressure and can be used to stamp products like panels on hydraulic presses.

A stamp is known for stamping panel-type products consisting of an upper half and a lower half with an engraving made therein, containing grooves for the main and additional contour edges of the product ij.

The use of an additional contour rib placed parallel to the main stiffener of the product in the stamp allows creating a two-sided scheme of metal flowing into the die groove under the main stiffener of the product, but necessitates an additional mechanical operation to remove the additional contour rib.

Of the known stamps, the closest to the invention in its technical essence is a stamp consisting of an upper half and a lower half with an engraving made therein, containing a groove for the contour edge of the product and a burr groove 2.

The disadvantage of this stamp is the low quality of the products.

due to the fact that in the process of precipitation of the original billet in the grooves of the stamp under the contour edge of the product, a one-sided pattern is observed. metal leakage from the central zones of the workpiece.

This leads to the marriage of the product according to the macrostructure or even the formation of a shot under the contour rib.

The aim of the invention is to improve the quality when stamping products such as panels with contour ribs.

15

The goal is achieved by the fact that in the stamp consisting of the upper half and the lower half with an engraving made in it containing a part of the contour edge of the product and

20, the burr groove, on the stamp engraving between the groove for the contour rib and the burr groove, along the entire contour, there is a cavity for the additional fabric of the product with a width of 1.5-3 times the height of the main fabric of the product.

Figure 1 presents the scheme of the stamp; FIG. 2 is a punch scheme with 30 preforms.

The stamp consists of two halves of the top 1 and bottom 2. In the lower half of the stamp, a groove 3 is made for the contour edge of the product and the aeuset groove 4.

The stamp works as follows

The original preform b is laid in the lower half of the 2 punch (see Fig. 2), after which the preform is deformed by the action of the upper half of the punch until the upper and lower halves of the punch are fully closed.

The presence of a cavity under the additional fabric 5 of the product provides a double-sided scheme of metal flowing in. The groove 3 under the contour edge of the product. Moreover, the width of the cavity for the additional web 5 is chosen so that during the whole process of stamping the distance from the (groove 3 line to the line of the metal flow section 7 is not less than half of the 3-width of the groove 3. Thus, during the whole deformation process The set of metal in the groove 3 under the contour edge of the product is carried out simultaneously from the side of the burr groove 4 and from the central areas of the product and is proportional to the cyTviMe lengths of the current lines 8 and 9.

In this case, the fibers of the macrostructural product correspond to the geometry of the instrument, which ensures high mechanical properties of the part being manufactured.

After punching, the forging is removed from the die and the deburring is cut along with an additional web along the outer contour edge of the product.

Claims (2)

1. Authors certificate of the USSR 682314, cl. At 21 J 13/02, 1979. 2. Stamp for hot metal deformation. Ed. Tyklina M. Higher School, 1977, p. 34-39 (prototype).