A new type of heavy-duty clamping device with single-drive four-finger synchronous clamping

Abstract

The invention discloses a novel heavy-load clamping device achieving single-drive four-finger synchronous clamping. The device comprises a power hydraulic cylinder body, a clamp shell body and outer connection rod mechanisms. The power hydraulic cylinder body is installed on the clamp shell body, a push rod of the power hydraulic cylinder body is of a structure composed of inner side arms and outer side arms, the upper side face and the lower side face of the exterior of the push rod are both fixedly connected with one outer side arm, and the upper side face and the lower side face of the interior of the push rod are both fixedly connected with one inner side arm; the two outer side walls of the push rod are symmetrically connected with the outer connection rod mechanisms respectively, the two inner side arms of the push rods are symmetrically connected with inner connection rod mechanisms respectively, and the outer connection rod mechanisms and the inner connection rod mechanisms are identical in structure. The clamping device is a key part in heavy-load operation equipment, enables a single hydraulic cylinder to drive four fingers to synchronously clamp a workpiece, the clamping stability coefficient of the heavy-load clamping device is increased, the critical load of a jaw is increased, clamping performance is improved, and the clamping device can be used for clamping the workpiece and matched with a forging machine to finish various forging technologies such as cogging, heading, drawing and finishing.

Description

technical field [0001] The invention relates to a clamping device, in particular to a new type of heavy-duty clamping device with single drive and four-finger synchronous clamping. It is one of the key parts of heavy-duty operation equipment and is mainly used for clamping workpieces. Cooperate with the forging press to complete various forging processes such as blank opening, thick pier, elongation, and finishing. Background technique [0002] With the rapid development of my country's economy, the demand for large-scale forgings in industry is increasing day by day, so it is necessary to develop large-scale heavy-duty forging manipulators with independent intellectual property rights. The forging manipulator, as a supporting facility of the forging press, is an important equipment for the forging workshop to realize forging automation and mechanization. The clamping device is one of the key parts of the forging manipulator to realize the workpiece clamping function. When...

AI Technical Summary

Problems solved by technology

When the output force F of the hydraulic cylinder remains unchanged, when G increases, the gravity moment of the clamped forging increases, the upper and lower jaws will rotate around the pin shaft respectively, the workpiece will fall at an angle around the center line, and the workpiece acts on the jaws. The torque of the jaws decreases and slides in the jaws, friction is generated between the contact surfaces, and the balance is reached again. At this time, the force of the upper and lower jaws acting on the workpiece and the gravity of the workpiece converge at one point, but the resulting deflection angle will make the workpiece Centrifugal force is generated during rotation, resulting in unstable clamping

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