Four-wheel friction screw press

Abstract

The invention discloses a four-wheel friction screw press, which comprises a horizontally rotating flywheel, wherein the flywheel is connected with a screw; the two sides of the flywheel are both symmetrically provided with an upper friction wheel and a lower friction wheel, the flywheel is driven by a motor to rotate, and the upper friction wheels and the lower friction wheels rotate in the same direction; the rotating shafts of the upper friction wheels and the lower friction wheels are movably connected with the two ends of a lever by pins; and the lever is driven by an oil hydraulic cylinder to swing around a fulcrum serving as a center of a circle to control the upper friction wheels and the lower friction wheels to alternately press or separate from the wheel rim of the flywheel. During operation, the piston rod of the oil hydraulic cylinder moves toward the central flywheel, the two lower friction wheels synchronously press the lower rim of the flywheel, the flywheel rotates rightward and a sliding block is pressed down; and the piston rod of the oil hydraulic cylinder moves outward, the two upper friction wheels synchronously press the upper rim of the flywheel, the two lower friction wheels separate from the flywheel, the flywheel rotates leftward and the sliding block is lifted. The friction wheels on the two sides press the flywheel with equal forces, so the screw press can eliminate the lateral force applied on the screw and obtain high forcing performance and high production efficiency under the condition of load increase.

Description

technical field [0001] The invention relates to a friction screw press in forging machinery, in particular to a four-wheel friction screw press. Background technique [0002] The traditional friction screw press is a two-wheel drive mechanism in which a friction wheel is arranged on both sides of the flywheel, one is to press down the friction wheel, and the other is to lift the friction wheel. During the forging process, the two friction wheels alternately press and release the flywheel. With such a structure, the screw will be subject to a large lateral force during the rotational movement, especially for the trapezoidal thread transmission with a large pitch, the friction between the thread teeth will be greatly increased, which not only reduces the mechanical efficiency of the transmission, but also causes cost The expensive copper nut wears in one direction, so it not only increases the power loss, shortens the service life of the equipment, but also causes great diffi...

AI Technical Summary

Problems solved by technology

With such a structure, the screw will be subject to a large lateral force during the rotational movement, especially for the trapezoidal thread transmission with a large pitch, the friction between the thread teeth will be greatly increased, which not only reduces the mechanical efficiency of the transmission, but also causes cost The expensive copper nut wears in one direction, so it not only increases the power loss, shortens the service life of the equipment, but also causes great difficulties to improve the forging capacity of the equipment

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