Axial floating positioning mandrel clamp

Abstract

The invention discloses an axial floating positioning mandrel clamp. The axial floating positioning mandrel clamp is composed of a round sleeve, a mandrel, a base, an expansion sleeve, a ring sleeve, a gasket and a nut, wherein the ring sleeve arranged outside the large diameter end of the mandrel in a sleeving mode is locked through a bolt, the small diameter end of the mandrel is provided with an outer thread matched with the nut, and a section of the expansion sleeve matched with a conical shaft is arranged at the middle section of the mandrel and is of an axial spiral expansion structure composed of the ring sleeve, the gasket and the nut. A matched linkage structure composed of an outer protruding tooth and a groove is arranged on the combination surface of the ring sleeve and the base. Counter bores are evenly distributed in the end surface, facing a tooth part of a bevel gear of a workpiece, of the base, piles supported by springs axially are arranged in the counter bores, and the outwards extending piles are sealed by covering plates to form elastic telescopic structures. By means of the axial floating positioning mandrel clamp, the degree of freedom of rotation of the workpiece in the radial direction and axial direction and around the axis of the mandrel is limited, the workpiece is positioned accurately and reliability, and the fine machining accuracy is improved. In addition, the inner expansion structure is not provided with external objects, and efficient grinding machining on an outer ledge of the workpiece is facilitated.

Description

technical field [0001] The invention relates to a mandrel type fixture, in particular to an axially floating positioning mandrel fixture used for finishing the outer shoulder of a bevel gear. Background technique [0002] Bevel gears in automotive differentials and gearboxes are used to transmit torque, and such heavy-duty transmission parts must have sufficient strength to meet the use requirements. In order to improve the structural strength of the bevel gear, on the one hand, it is made of high-strength alloy steel, and on the other hand, it is produced by precision forging forming technology, and then the manufacturing quality is improved through tooth finishing and outer shoulder finishing. The bevel gear belongs to a kind of angular transmission parts, the structure is very special, and it is difficult to clamp the outer shoulder after finishing machining. In the prior art, the tooth mold fixture is paired with the workpiece bevel gear for positioning. This kind of fi...

AI Technical Summary

Problems solved by technology

Because the tooth surface is a curved surface, the forming process is difficult, and there is a certain amount of manufacturing error. When the two are matched, there must be a clamping error, and the bevel gear of the same workpiece is matched with different tooth positions, and there will be errors of different values, which is commonly known in this industry. "Gear change error", this uncertain error cannot be predicted, so the machining quality of the workpiece bevel gear is difficult to control

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