SU612822A1 - Screw press - Google Patents

Description

If the screw 3 is in the upper position and held through pin 5 by the force of fluid pressure in the rod end of the cylinders 10, the slider 2 by its gravity acts on the upper bearing 12, providing a gap between the fifth pin and the bolster 6. Rod cavities of the cylinders 10 they can be controlled from hydraulic equipment (not shown) or directly connected to a pump accumulator (not shown). The piston cavities of the cylinders 10, which are controlled from the hydraulic equipment, during movement of the screw 3 upwards and its height in the upper position are connected to the slider.

To accelerate the screw 3 down, the porn cavities of the cylinders 10 are connected to the hydraulic accumulator, and the rod cavities, if controlled, with a drain.

The resultant force of the hydraulic cylinders 10 through their rods and brackets 11 in addition to the strength of the slider 2, screws 3 with a flywheel 7 accelerates screw 3, the slider 2n parts associated with them, making the acceleration downward. Fluid from the rod cavities of the cylinders 10 is squeezed out.

The screw 3, rotated in the nut 4, causes it to turn, ensuring the constancy of the ratio of the angular speed of the flywheel 7 of the screw and the angular velocity of the flywheel of the nut 9 by means of gears 8.

Screw 3 simultaneously simultaneously accelerated, with slider 2 down.

Before starting the deformation of the billet, the hydraulic cylinders 10 can be turned off and their piston cavities are connected to the hydraulic tank through check valves (not shown), having performed the press operation mode - "molotovy." By hydrocylindra 10 can remain switched on and during the whole course of deformation of the workpiece, doing additional work of deforming the workpiece due to the hydrostatic force of the cylinders 10, carried out the press operation mode - "press hammer press."

At the end of the slide stroke, all the kinetic energy acquired by the mobile parts of the press is transferred to the work of plastic deformation of the workpiece and the accompanying work of friction and elastic deformation. At this moment, the gap between point 5

and the fender 6 is selected, and the brackets 11 are mixed relative to the slider 2.

The torques arising in the screw pair (3, 4) are equal for the nut and the screw and are directed towards each other. Upon completion of the deformation of the workpiece, the piston points of the cylinders 10 are connected to the drain lines, and the resultant pressure force of the fluid in the rod end of the cylinders 10 through

their rods, brackets 11, lower thrust bearing 13 and p tu 5 raise the screw 3 to the upper initial position. The slider 2 with its force of gravity acts on the upper thrust bearing 12, providing a gap between

fifth 5 and attendant 6.

The resulting pressure force of the fluid in the rod end of the cylinders 10 also performs the functions of the braking force holding the screw 3 and the slide in the upper position.

In comparison with the known technical solution, the proposed design of a screw press allows to provide a guaranteed gap in the movable joint of the slide with a screw and to increase the reliability of the operation of the press.

Claims (1)

Invention Formula A screw press containing a slider mounted in the bed guides, a screw mechanism made in the form of a screw and a nut, double-acting hydraulic cylinders mounted in the bed stands and associated rods with slider arms, characterized in that, in order to increase press reliability by providing a guaranteed clearance in the movable joint of the slider with the screw, it is equipped with bearings and directional slides arranged on the press slider, as well as installed in these slats with possibility of movement in the vertical plane relatively nolzuna fork brackets, interacting through these bearings with screw press. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 472019, cl. In Call 1/23, 1973. //////////////////// FIG. .2