SU1496893A2 - Apparatus for plastic deformation of steel blanks - Google Patents

Abstract

The invention relates to the processing of metals by pressure, in particular to devices for the deformation of metals under high hydrostatic pressure, can be used in various industries, in particular, for the manufacture of cavities of a press-stamping tool. The purpose of the invention is the expansion of technological capabilities in the deformation of steel billets. The device comprises a container with a cavity for the working medium — a high-pressure chamber, a deforming tool, and means for removing the blank from the container in the form of a spring-loaded ejector. A hydraulic cylinder is attached to the lower end of the container, the cavity of which is connected to the cavity of the high-pressure chamber by a channel-nozzle and by-pass valve. A winding of an electromagnet is mounted on the wall of the container, creating a magnetic field in the cavity of the container that acts on the working medium in the form of a magnetic fluid. 1 il.

Description

The invention relates to the processing of materials by pressure, namely, devices for deforming metals under high hydrostatic pressure, used in the engineering, tool and other industries, in particular, for the manufacture of cavities of a press-stamping tool, and is an improvement of the invention by the author. . No. 1388172.

The purpose of the invention is to expand the technological capabilities of the device.

The drawing shows schematically the proposed device, a general view (in the left part - in the initial position, in the right - in the final). ,

The device for plastic deformation contains a container 1 with a guide ring 2 attached to it from above to guide the working plunger-punch 3. A spring-loaded ejector 4, needles, is installed in the high-pressure working chamber. Tovik which passes into the central hole at the bottom of the working chamber. A hydraulic cylinder 5 with a piston 6 placed in it is attached to the lower end of the container. The hydraulic cylinder cavity communicates with the cavity of the high-pressure chamber through the nozzle channel 7 and before. opening valve 8. Billet 9 (in the experiment - from ST.40X) ustanavlivayut 1vayut on the upper end of the jay: kivatel 4.

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The container 1 has a winding of an electromagnet 10. Magnetic fluid is used as the working medium.

The parameters of the device during tests are as follows: a magnetite mixture (12 vol.%) In kerosene, stabilized with oleic acid, was used as magnetic fluid, and the external magnetic field strength reached 60 kA / m.

The device works as follows.

The hydraulic cylinder 5 is filled with working fluid in the required volume. After this device is installed and secured on the desktop of the pressing equipment.

Then the piston 6 and the ejector 4 are transferred to the upper extreme position, and the working fluid through the nozzle 7 and the bypass valve 8 fills the high pressure chamber (the electromagnet 10 is disconnected at this time), the bushing 9 is installed on the upper tor the ejector 4, the press actuating body acts on the working plunger-punch 3, and the latter comes in contact with the processed workpiece through the guide ring,

At this point, an electromagnet 10 is turned on, which creates an external magnetic field in the high-pressure working chamber. The workpiece 9 is moved together with the ejector 4

down, and the plastic deformation process takes place. After its end, the electromagnet 10 is turned off, the executive body of the press returns to its original position, and the press ejector forces the working fluid through the open valve 8 and the nozzle 7 into the working chamber.

When switching to a workpiece, the material of which requires a different degree of viscosity of the working medium, the intensity of the magnetic field is changed accordingly by means of an electromagnet.

Thus, by varying the intensity of the magnetic field in a fairly wide range, you can change the viscosity of the hydrostatic medium and, consequently, the pressure in the working iiKaMepe, which provides an expansion of the technological capabilities of the device.

Claims (1)

Invention Formula A device for plastic demolition of steel billets according to autos, no. 1388172, characterized in that, in order to expand technological capabilities, the container is equipped with an electromagnet winding with the possibility of influencing its magnetic field on the working medium, as the latter used; Magnetic liquid.