SU1258705A1 - Double-action screw press - Google Patents

Description

The invention relates to mechanical engineering, in particular to the construction of screw presses.

The goal of the design is to simplify the design and reduce the metal intensity of the press.

The drawing shows the structural scheme of the proposed press.

The press contains a bed 1, in the guides of which there is an outer slider 2 with a nut 3. In the inner cavity of the slider 2 an internal slider 4 with a nut 5 is mounted. The nuts 3 and 5, having non-braking opposing screw cuts, are connected with each other differential screw b, which is connected via thrust 7 to the driving screw 8, screwed with a nut 9 installed in frame 1. The geometrical parameters of the screw cuts 6 and nuts 3 and 5 satisfy the condition

ke. hu

(one)

h.

P

where hg is the stroke of threading the nut 5 and the corresponding threading of the screw 6;

- stroke screw threading nut 3 and reciprocal threading screw 6; - clamping force on the outside

slider; Pg - strain force on

internal slider. Power cylinders 10 are installed between outer 2 and inner 3 sliders, the housings of which are installed, for example, on the outer slide 2, and the rods 11 are connected to the inner slide. 4, the semi-matrixes 12 and 13 are mounted on the outer slider 2 and the frame 1. The flywheel 14 is fixed on the drive screw 8.

The press operates as follows. In the initial, extreme upper position of the movable parts of the press, the inner slider 4 is closed with the upper end. With the outer slider 2 Stock-11 cylinder 10 is in the upper position, there is no pressure in the cylinder 10.

.G switching on a drive (not shown) iodine parts accelerated displacement

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Random polygons pr-tie, Uzhgorod, st. Project, 4

258705

down at the same translational speed.

With the approach of the outer slide 2 to the lower position before closing.

5 semi-matrix 12 and 13 energy carrier is fed into the upper cavities of the cylinders 10. Under the pressure of the energy carrier, the outer slider 2 communicates the speed opposite to the movement of the moving

 0. parts and it slows down, and the internal slider 4 - speed along the direction of movement of moving parts and it accelerates. When this screw 6 is rotated under the action of

15 opposing axial forces from nuts 3 and 5, having non-braking tapping in opposite directions.

The closure of the semi-matrix 12 and 13 occurs at a reduced speed of the outer slide 2, after which the supply of energy to the upper cavities of the cylinders 10 is stopped.

Further, the inner slider 4 performs the work of deforming. The pressing of the semi-matrix 12 and 13 during the course of deformation is accomplished (exerted by the outer slider 2 by reaction forces that occur in the nut 3 while overcoming resistance to deformation of the forging by the internal slider 4, the clamping force satisfies condition (1).

After the deformation stroke has been completed, the press drive is switched to the return stroke. At the same time, pressure is applied to the lower cavities of the cylinders 10. At the same time, the inner slider 4 initially rises together with screws 6 and 8, and the outer slider 2 remains in its lowest position. From the moment the inner ram 4 touches the outer chin 2, the pressure in the lower cavities of the cylinders 1.0 is released, the rotational movement stops. The vision of the Vipta 6. Further lifting of the moving parts to the initial position occurs simultaneously under the action of the drive of the press, which is turned off in the extreme upper position of the moving parts. The cycle is over.

The economic effect of the invention is obtained by simplifying the design and reducing the metal intensity of the press.

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Claims (1)

DOUBLE-SCREW PRESS, containing an external slider with a nut mounted in the frame guides, an internal slider with a nut located in the cavity of the external slider, a differential screw connected by threaded nuts to the external and internal slide, connected by a thrust bearing to the differential screw, the drive screw with the flywheel, juic with a nut fixed in the bed, as well as a mechanism for reducing the speed of the outer slide with power cylinders and rods, characterized in that, in order to simplify the design and and reducing metal consumption, power cylinders are mounted on one of the sliders, and the rods are connected with another slide. 1258705 A1 f