SU1214280A1 - Apparatus for centrifugal forming of hollow articles - Google Patents

Description

The invention relates to the processing of metals by pressure, in particular to devices for the centrifugal molding of hollow sheet metal parts.

The purpose of the invention is to increase the productivity by simultaneously forming at least two parts and increasing the height of the parts by increasing the deformation forces.

FIG. I shows the device, a longitudinal section (to the right of the axis of symmetry, the initial position of the device is shown, to the left - the final position); in fig. 2 shows section A-A in FIG. one.

The device comprises a reservoir 1 with a conical inner surface, filled with a working fluid medium. 2, for example, metal small balls (shotguns), and associated with a cylindrical drum 3, on the inner surface of which four matrixes 4 and clamps 5 for fixing the workpieces having a horizontal axis of symmetry are radially arranged in the grooves. Tank I is mounted on a vertical shaft 6 connected to the drive 7 and contains radial blades 8 for moving the working medium 2 to the part molding area due to centrifugal forces during the rotation of the drum. From above, the device is closed with a bolt 9. The numeral 10 indicates the shape of the workpiece, the numeral 1 - the finished part

The device works as follows.

The tank 1 is filled with working medium 2, for example metal steel balls, evenly in all the compartments between the working vanes 9. Four workpieces 10 are placed on the working surfaces of the dies 4 vertically and fixed by clamps 5. Turning on the drive 8 causes the device to turn on. The speed of rotation of the fluid 2 must satisfy the condition

60 1 Pb, R

li DlS

P

rpm

where D is the diameter of the inner surface of the drum along the line blanks,

Pb is the force required to form the part; R is the drum radius along the line of blanks;

m is the mass of the working medium acting on the workpiece. Working medium 2 due to centrifugal forces moves along the conical surface of tank 1 into the stamping zone and acts on the workpieces 10 in the radial direction, creating the required fluid pressure on the flanges and walls of the molded parts 1 During the drawing process, the radius of the working medium increases, resulting in increased pressure on the walls of the workpiece 10 due to an increase in centrifugal forces while maintaining pressure on the flange of the workpiece 1 o "

The proposed device provides an increase in productivity due to the simultaneous forming of at least two parts and an increase in the height of the parts due to an increase in centrifugal forces acting on the workpiece.

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fPue. 2

Claims (2)

1. DEVICE FOR CENTRIFUGAL CENTRIFUGAL FORMING OF HOLLOW PARTS, comprising a reservoir with a working medium rigidly mounted on a vertical shaft connected to a rotation drive, characterized in that, in order to increase productivity by simultaneously molding at least two parts and increasing the height of the parts beyond by increasing the deformation forces, the tank is made with a conical inner surface, and the device is equipped with at least two working blades rigidly fixed inside the mouth of the tank in the radial direction and of a tight fixed to the open end of the reservoir drum with radial recesses disposed therein and removable dies and clamps, having a horizontal axis of symmetry. 2. The device according to p. ^ Characterized in that metal fraction is used as the working medium. FshZ ί