Mechanical fastening device capable of adjusting center height

Abstract

The invention provides a mechanical fastening device capable of adjusting the center height. The mechanical fastening device comprises a rigid assembly and a center height adjusting assembly. The rigid assembly comprises a rigid rod, a nut, a gasket and a clamp spring. The center height adjusting assembly comprises a fixed seat and a moving platform. One end of the rigid rod is provided with an outwards-expanding conic segment. The nut, the gasket and the clamp spring are mounted on the rigid rod. When the nut moves outwards, the gasket is pushed, the clamp spring and the conic segment of therigid rod are extruded to generate expanding force, and an inner hole of a to-be-fastened part is expanded. The fixed seat and the moving platform cooperate through a bevel guide rail pair, transmission is achieved through a spiral pair, and translation and up-and-down height adjustment of the moving platform are achieved. The right rod is fixed to the moving platform. According to the mechanicalfastening device, parts can be clamped, rigidity of the process system can be guaranteed, and machined products can completely conform to process technical indexes.

Description

technical field [0001] The invention relates to the technical field of workpiece clamping in machining, in particular to a mechanical fastening device with adjustable center height. Background technique [0002] In the current prior art of mechanical processing, the clamping method of the product is usually clamped by using a three-jaw chuck, a machine vise, a pressing plate, and the like. However, when encountering some products with irregular shapes, because such products not only have low dimensional consistency on the outer surface, but also have a large length, if it is necessary to process the precision groove at the middle boss in the length direction, due to poor rigidity , A slight force will cause shaking, and the traditional general-purpose fixture cannot be clamped, and it is impossible to strengthen the rigidity of the middle boss, so the precision groove of the middle part is often unable to be processed due to the poor rigidity of the process system. Therefor...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem that the existing technology processes products with irregular shapes, the two ends of the workpiece are clamped by pressing plates, and the middle boss is not rigid enough due to the lack of process system rigidity, and the traditional general-purpose clamps cannot be clamped and cannot be processed normally. The present invention proposes a The mechanical fastening device that adjusts the center height can not only clamp parts but also ensure the rigidity of the process system, so that the finished product fully meets the process technical indicators

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