SU1209359A1 - Die for swaging blanks - Google Patents

Description

The invention relates to the processing of metals by pressure, in particular to the design of dies for a bulk, preferably hot, set.

The aim of the invention is to improve the quality of the forgings obtained and to facilitate their removal from the die.

Figure 1 shows the stamp in the open position, a General view in section; figure 2 is the same, in the closed position, a general view in section, in fig.Z - section AA in figure 2; figure 4 - section bb in figure 2.

The stamp for precipitation of the blanks contains the upper 1 and lower 2 tools which are rigidly attached respectively to the movable plate 3 and the lower fixed section 4 of the press. On the lower tool 2, the rods 5 are pivotally mounted with the possibility of vertical movement. The rods 5 are mounted on the tool 2 by means of an axis 6 and are spring-loaded in the direction of the upper tool by springs 7.

Each of the rods 5 is made with a main bevel 8 on its surface p facing the tool 2. At the opposite end, an additional bevel 9 is made on the opposite side of each of the rods 9. The gap between the upper tool and the rod in the area of the additional bevel on the side of its end is determined by the dependence

t,

R .

where b (- the length of the upper part of the rod to the axis 6 of the hinge; 2 the length of the lower part of the rod

to axis 6 of the hinge; B is the gap between the lower tool and the rod in the zone of the main bevel from the side of its end.

In the upper tool 1, the rods 5 are filled with holes.

12093592

The upper and lower tools 1 and 2 and the rods 5 when entering them into the holes of the upper tool form a stream of the stamp. The free entry of 5 rods into the holes of the upper tool is provided by the condition

 t

The stamp works as follows. Before starting work, the movable plate 3 is in the upper position. In this case, the rods 5 are also in the upper position. The blank 10 is installed on the tool 2 between the rods 5, fixing it relative to the latter. During the course of the upper plate 3 with the upper tool 1, the rods 5 go into the screw

tool 1 and form a stream stamp. After this, the workpiece sediments with the restriction of the radial flow of the metal at the locations of the rods 5. In the process of precipitation, the frictional forces that occur at the places of contact of the deformable workpiece with the rods move the rods down at a speed two times lower than the speed of movement

tool. The rods in this case move relative to the lower tool by an amount equal to half the vertical deformation of the workpiece. The upper tool holds the rods in a vertical position.

During the reverse upward movement of the plate with the upper tool 1, the rods 5 emerge from the orifice of the upper tool and, due to hinging with the tool 2, rotate about axis 6, freeing the workpiece 10, which is then freely removed from the die.

The number and shape of the rods is selected depending on the shape of the forging.

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Phage.Z

Editor A. Vorovich

Compiled by V. Beschekov

Tehred O. Vashchishin Corrector I. Erdeyi

361/16

Circulation 656 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch PPP Patent, Uzhgorod, st. Project, 4

Claims (2)

1. A STAMP FOR DRAINING OF THE BILLETS, containing the upper and lower forming tools, as well as the limiters of the radial flow of the metal of the workpiece in the form of rods with main bevels, pivotally mounted on one of the tools, characterized in that, in order to improve the quality of the obtained forgings and facilitate their removal of the stamp, the rods are mounted on the lower tool and facing it with the main bevels, at the other end of each rod there are additional bevels on the side opposite to the main bevels, and the gap is m forward upper tool and the rod in an additional bevel location area from its end defined by the relationship and wherein - the gap between the upper tool and the rod in the zone location of additional taper from its end, mm; B - the gap between the lower tool and the rod in the area of the main bevel from the side of its end, mm; K. - the length of the upper part of the rod to the axis of the hinge, mm; 6 ₂ - the length of the lower part of the rod to the axis of the hinge, mm; the lower tool is made in a one-sided bevel on the side of the upper tool in the zone of interaction with the surface of the rod, with each rod in the eons of the main bevel and the mentioned bevel of the lower tool being located relative to the latter with equal gaps. 2. Stamp pop.1, characterized in that each of the rods is spring-loaded towards the upper tool. > t