Self-centering end face compressed centering structure

Abstract

A self-centering end face compressed centering structure comprises an ejection oil cylinder, a connecting flange, a screw, a limiting flange, a plurality of claws, steel balls, compression springs, a tapered mandrel, a gland, a fastening screw and a nut. The tapered mandrel is fixed on the connecting flange which is connected with the limiting flange, a plurality of uniformly arranged claws are arranged in a space formed by the tapered mandrel and the limiting flange, the claws are positioned in an axial tapered groove in an outer tapered face of the tapered mandrel, travel gaps are reserved among the outer sides of the claws and the limiting flanges, the steel balls and the compression springs arranged on the claws guarantee fitting of the claws and the tapered mandrel, the gland connected onto the tapered mandrel protects the claws in a free station from falling off, and the claws in the free station are in contact with an end face of the gland. When in use, stepped excircles and end faces of the claws are in contact with an inner hole of a workpiece at the same time and synchronously move under an action of pushing of a piston shaft of the ejection oil cylinder so as to realize a self-centering function for clamping and supporting the workpiece, and at this time, the claws radially center and axially compress the workpiece.

Description

technical field [0001] The invention relates to a self-centering end surface pressing type tip structure, which belongs to a mechanical transmission device and is mainly used for clamping and tightening the inner holes of sleeve parts and self-centering adjustment. Background technique [0002] In the self-centering positioning of the inner hole of a large-diameter part, the self-centering chuck will limit the axial and radial directions of the workpiece after locking, and the fixture cannot be adjusted relative to the workpiece. Another method can be to use an expansion mandrel, but for Mandrel costs are high for long workpieces. Contents of the invention [0003] For the inner hole self-centering clamping of long cylindrical parts, the invention provides a self-centering end surface pressing top structure with simple structure, reliable clamping and convenient operation, through the radial and axial synchronous movement of the jaws Compression to achieve self-centering ...

AI Technical Summary

Problems solved by technology

[0002] In the self-centering positioning of the inner hole of a large-diameter part, the axial and radial directions of the workpiece are all limited after the self-centering chuck is locked, and the fixture cannot be adjusted relative to the workpiece. Another method can be to use an expansion mandrel, but for Mandrel costs are high for long workpieces

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