Anti-lock device for eccentric body mandrel of mechanical press

Abstract

An anti-lock device of an eccentric body mandrel of a mechanical press comprises a rotating mandrel, a first bearing bush and a second bearing bush, wherein the rotating mandrel is fixedly connected with the eccentric body in an eccentric body inner hole through a wedge-shaped key, the rotating mandrel synchronously rotates along with the eccentric body, the wedge-shaped key is fixed through a shaft retainer ring, one end of the rotating mandrel is provided with a pillow block, the first bearing bush is fixed into an upper cross beam hole through a fastening screw, one end of the rotating mandrel is arranged in the first bearing bush, the first bearing bush is provided with a first flange, the inner side of the pillow block and the outer end face of the first flange form a first sliding friction pair, the second bearing bush is fixed into a mandrel sleeve hole through a fastening screw, and a mandrel sleeve is fixed into an upper cross beam hole through a hexagon bolt with a hole and an iron wire. By the adoption of the anti-lock device of the eccentric body mandrel of the mechanical press, the service life of the bearing bushes is prolonged, the motion speed, precision and production efficiency of the mechanical press are improved, product quality is guaranteed, the problem that the eccentric body mandrel of the mechanical press generates shifting under action of axial load, and stability of a machine tool and personal safety of operators are guaranteed.

Description

Technical field: [0001] The invention relates to an anti-lock device for an eccentric body core shaft of a mechanical press. Background technique: [0002] Currently, existing mechanical presses such as figure 1 As shown, both ends of the fixed mandrel 2 of the eccentric body 4 are fixed on the upper beam 5 by bolts, the bearing bush 3 rotates around the mandrel with the eccentric body, and the fixed mandrel and the bearing bush form a sliding friction pair to move relative to each other. When the bearing pad rotates at high speed and the pressure of the forging part increases, the frictional force will generate heat. As the temperature of the bearing pad rises and heats up, it will expand, which will reduce the gap between the fixed mandrel and the bearing pad, which may cause accelerated wear and tear of the bearing pad, which will easily lead to fixation. The mandrel and the bearing bush are sintered and locked, so that the fixed mandrel rotates with the eccentric body, ...

AI Technical Summary

Problems solved by technology

[0004] In order to make up for the deficiencies in the prior art, the present invention provides an anti-lock device for the mandrel of the eccentric body of the mechanical press, prolongs the service life of the bearing bush, improves the movement speed, precision and production efficiency of the mechanical press, and ensures the quality of the product. It solves the problem that the mandrel shaft of the eccentric body of the mechanical press is moved by the axial load, ensures the stability of the machine tool and the personal safety of the operator, and solves the problems existing in the prior art

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