SU1209357A1 - Apparatus for shaping blanks - Google Patents

Description

The invention relates to the processing of metals by the pressure of two hard punches under conditions of high hydrostatic pressures and can be used in the engineering, tool and other sectors of the national economy.

The aim of the invention is to expand the technological capabilities of the process by increasing the range of products obtained.

Figure 1 shows the stamp, a General view, figure 2 - node installation of the matrix,

The stamp comprises a container 1, a drive plunger 2 and a supporting plunger 3 with seals 4, a mold matrix 5 dividing the container cavity into compression chambers 6 and 7. The compression chambers are interconnected by channels 8. The deforming punches 9 and 10 are fixed respectively in the plungers 2 and 3.

The stamp works as follows

A deforming punch 10 is installed and fixed in the socket of the plunger 3. A shaping matrix 5 is installed in the conical boring of the container and the working fluid is poured. The deform Fork billet 1 1 is installed in the die 5, the working fluid is poured into the chamber 6, then the plunger 2 is installed with the upper punch 9 fixed on it.

When a load is applied to the plunger 2, the force through the punch 9 is transferred to the workpiece 11. At the same time, the movement of the plunger 2 squeezes the fluid in the chamber biv connected to it by channels 8, chamber 7, the presence of pressure in chambers 6 and 7 gives rise to an axial force face areas of chambers 6 and 7 on the value of pressure of liquid and directed to the side of smaller face area.

wasp

 (Sj-Sg) q kgf.

where r

 - axial force}

 - area of the chamber szh, ty 7, m Sg - area of the chamber of compression 6,

q - fluid pressure PMa. Equal pressures in chambers 6 n 7 cause the container to move

50

50

about 5

0

fi

1 together with the matrix installed upward due to the difference in the areas of chambers 6 and 7, resulting in an increase in the volume of chamber 12. Moving the matrix 5 relative to the punch 9 upwards provides a gradual pushing of the workpiece 11 by the punch 9 along the matrix 5 into the increasing chamber 12, where the workpiece is deformed by the punch 10.

Thus, the workpiece 11 in the process of deformation has a hard direction when moving the matrix, which increases the axial stability of the workpiece and provides the possibility of deforming the workpieces with the ratio h / d 1. The specific deformation pressure decreases due to the gradual deformation of a small volume of the workpiece.

Simultaneous clearance of the internal cavity facilitates the process of filling the volume of the chamber 12 with a deformable workpiece, in which the clearance of the outer contour of the workpiece takes place. The process of deformation of the workpiece 12 by rigid punches 9 and 10 is accompanied by an increase in fluid pressure in the cavity of the container 1, which acts on the punches 9 and 10 and on the workpiece 11, improving the plastic flow conditions of the workpiece material and reducing the friction between the walls of the die and the workpiece as a result of a lubricating film.

At the end of the molding process, a receiving cup (not specified) is placed on the upper end of the container 1. By applying axial force, container 1 is returned to its original position. At the same time, the liquid from chamber 6 is forced out into chamber 7, by pressing out the plunger 2 with the pugson 9 attached to it from the cavity of the container. At the same time, the matrix 5 with the workpiece 11 placed in it is pressed in the plunger 10 and remains in the chamber.

The design of the proposed stamp allows simultaneous processing of the inner and outer contour in blanks of hard-to-deform materials.

    H1ch l l

Fy

12

Editor A. Shandor

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 PIP Patent, Uzhgorod, st. Project, 4

FIG. 2

Claims (1)

DEVICE FOR DEFORMING PREPARATIONS, containing a container with drive and support plungers placed therein, forming a closed cavity, a matrix fixed to the container with an outer surface in the form of a truncated cone, dividing the container cavity into a working and auxiliary chamber under high pressure liquid, connected by channels, made on the outer surface of the matrix, characterized in that, in order to expand the technological capabilities of the process, it is equipped with two punches, coaxially fixed in the plungers, in this case, the matrix is made with a stepped inner surface, and the diameters of the steps of the inner surface of the matrix are equal to the diameters of the punches. >