SU829300A1 - Die for hot isotermic forming - Google Patents

Description

(54) STAMP FOR HOT ISOTHERMAL STAMPING

The invention relates to the processing of metals by pressure and can be used in the preparation of metal stamped products, for example, thin-walled parts from titanium alloys, by means of hot isothermal stamping.

A stamp for hot isothermal punching is known, containing movable and stationary parts, in each of which a heat-insulating casing is fixed with a window for loading workpieces in one of them, as well as a heater of working zone 1

The disadvantage of this stamp is the low quality of products, especially with thin sections, due to the fact that the stamped products are cooled in air after being removed from the stamp.

The purpose of the invention is to improve the quality of the forged products by reducing the cooling rate after

stamping.

This goal is achieved by the fact that a stamp for hot isothermal stamping, containing movable and fixed parts, each of which has a heat insulating casing with a window made in one of them

for loading the blanks, as well as the heater of the working area, is provided with a rotary ring with sockets for placing the stamped products mounted in the annular cavity made inside one of the above-mentioned cases of the annular cavity. in the inner part of the case there is a window with a working area, and on the other hand by means of a window made in the outer part of the case with atmosphere.

The drawing shows schematically

5 Stamp for hot isothermal stamping, cut.

The stamp consists of the upper 1 and lower 2 plates, on which with the help

0 stamp holders 3 and 4 are attached to the die inserts 5 and 6. The stamp is provided with a heat insulating cable, which is made in the form of two casings, the lower Fixed 7 and the upper

5 of the movable 8. In the fixed casing 7 there is a working window for loading and unloading blanks (not shown in the drawing) and an annular cavity covering the lower part of the working area

0 A, connected to one side with

the working area B, the Vis window of the other side - with the atmosphere by the window G. In the cavity A of the casing 7 a rotating ring 9 is mounted with sockets for stamped products 10.

The die is heated and the required temperature is maintained by a heater 11, for example, an indicator.

The stamp works as follows.

In the initial position, the heated billet is placed in the die and deformed as the press ram moves down. After the slider returns to its original position, the stamped product is pulled out of the die and through the window B connecting the working cavity B to the annular cavity A is placed in the slot of the ring 9. After that, the ring is rotated to a certain predetermined angle so that the next jack of the slewing ring 9 is set. The cycle is repeated.

The rotation of the ring can be carried out both from an individual drive and from a press ram as it goes down or up.

The removal of the stamped product from the socket of the ring 9 is performed through the window D connecting the annular cavity A with the atmosphere.

Due to the fact that the stamped product is being placed into the slot without being removed from the installation, and subsequent cooling occurs when the corresponding turns of the ring 9 in the annular cavity A, in which the temperature decreases gradually, the product is cooled after stamping at a predetermined speed and does not exceed the cooling rates that exist during heat treatment, which significantly improves the quality of the pressed products, the homogeneity of the metal structure of the products and eliminates the possibility of their distortion from heat stresses arising from a sharp temperature difference between the heated product and the environment.

Claims (1)

1. Figlin S.Z. and other. Isothermal deformation of metals. M., Mechanical Engineering, 1978, p. 29-32, fig. 10 and 11. // ten 7 /