Positioning and clamping mechanism for machining outer circle of brake

Abstract

The invention discloses a positioning and clamping mechanism for machining the outer circle of a brake, and relates to a positioning and clamping mechanism for outer circle machining. The positioning and clamping mechanism comprises a pedestal, a pull rod, a pressing plate, a spring tensioning sheet and a positioning connection base. The pedestal is connected with a machine tool. The lower end of the positioning connection base is arranged at the upper end of the pedestal in a sleeving mode and is further fixedly connected with the pedestal through a key. The upper end face of the positioning connection base is connected with a workpiece. The pressing plate is located above the positioning connection base, and the spring tensioning sheet is installed between the pressing plate and the positioning connection base. One end of the pull rod is fixed to the pressing plate through a fastener, and the other end of the pull rod sequentially penetrates through an inner hole of the pressing plate, an inner hole of the spring tensioning sheet, an inner hole of the positioning connection base and an inner hole of the pedestal and stretches out of the lower side of the pedestal. The outer circle of the pull rod is in sliding fit with the inner hole in the upper end of the positioning connection base. By means of the positioning and clamping mechanism, the gap between a positioning tool and a brake bottom plate can be removed, the positioning and clamping mechanism has the characteristics of being convenient to mount and dismount, low in maintenance cost, reliable in structure and capable of improving machining accuracy, and application and popularization are made easy.

Description

technical field [0001] The invention relates to a positioning and clamping mechanism for outer circle machining, in particular to a positioning and clamping mechanism for outer circle machining of a brake. Background technique [0002] At present, the outer circle machining and positioning tooling of drum brakes all use a positioning mandrel and the brake base plate of the brake for small clearance positioning; during processing, the workpiece is in contact with the machining tool, and due to the existence of a matching gap, the brake base plate will move toward the gap. The deviation of one side will often cause the braking surface of the machined brake workpiece to be out of tolerance. When the tolerance of the positioning hole of the brake base plate deviates upward, and the wear of the positioning tooling deviates downward, this out of tolerance is particularly obvious. When assembling the brake drum , often resulting in uneven braking clearance on both sides. SUMMARY ...

AI Technical Summary

Problems solved by technology

[0002] At present, the positioning tooling for outer circle processing of drum brakes uses a positioning mandrel and the brake base plate of the brake for small gap positioning; during processing, the workpiece is in contact with the processing tool, and due to the existence of a matching gap, the brake base plate will move towards the gap. One side deviation will often cause the braking surface of the processed brake workpiece to be out of tolerance. When the tolerance of the positioning hole of the brake base plate deviates upwards, and the positioning tooling wears and deviates downwards, this tolerance is particularly obvious. When assembling the brake drum , often leads to uneven brake clearance on both sides

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