Angular precision positioning device for crank of crankshaft

Abstract

The invention relates to an angular precision positioning device for a crank of a crankshaft, which comprises a left fixture, a right fixture, a left clamping mechanism, a right clamping mechanism, a left arc block, a right arc block, gaskets, side gaskets, an angular precision positioning device body and an axial positioning plate. The left arc block and the right arc block are fixed to support arc centers of the left fixture and the right fixture by fasteners, the gaskets which are used for adjusting distances from centers of the corresponding arc blocks to the rotation center of a spindle of a tailstock are respectively placed between the left arc block and the left fixture and between the right arc block and the right fixture, the side gaskets are placed on side surfaces of the left arc block and the right arc block, and are used for correcting the axis of the spindle of the crankshaft so that the axis of the spindle of the crankshaft is coincident with the rotation center, the left clamping mechanism and the right clamping mechanism which are used for clamping the crankshaft to be processed are respectively mounted on the left fixture and the right fixture, and the angular precision positioning device body and the axial positioning plate are mounted on the left fixture. The angular precision positioning device has the advantages that the angular precision positioning device is simple in structure, simple and convenient in operation, fast and time-saving in indexing, high in production efficiency, low in processing and manufacturing costs and wide in indexing, and is safe and reliable, and the fixtures are high in rigidity.

Description

technical field [0001] The invention relates to a simple and fast angular precise positioning device for crankshaft crankshaft machining, especially a precise angular positioning device for manual operation and precise indexing when grinding the connecting pin journals of a multi-pin crankshaft . Background technique [0002] As we all know, the crankshaft is composed of the main journal and the connecting rod journal. The connecting rod journal is usually distributed eccentrically at a certain angle. Every time the connecting rod journal is processed, its center must be turned to the rotation center of the main shaft. A crank mechanism is installed on each gear connecting rod journal. Swing back and forth to transmit power. Therefore, the more the number of connecting rod journals on a crankshaft, the greater the power it transmits. For example, the number of connecting rod journals of a crankshaft of a six-cylinder internal combustion engine refers to six, usually distri...

AI Technical Summary

Problems solved by technology

[0004] It can be seen from the above that the entire clamp body manufactured according to the above structure has many structural layers, overhanging overhang, poor rigidity, large amount of processed parts, and the processing of the dovetail or rectangular guide rail for adjusting the eccentricity is troublesome. Scrape the surface of the guide rail, but also purchase purchased bearings, high cost and other disadvantages

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