Method for processing shaft with small eccentricity

Abstract

The invention relates to a method for processing a shaft with small eccentricity, which comprises the steps of processing a shaft blank and lathing a centric circle roughly and is characterized in that the process of the technique for processing the shaft with small eccentricity is as follows: an eccentric circle is roughly lathed; a point deviated from the center of the centric circle for a certain distance is taken as the center of the eccentric circle; a threaded hole is marked, drilled and tapped on the left end surface of the shaft; a threaded hole is drilled and tapped at a position deviating from the central line with the same distance on the right end surface of the shaft; a left card plate and a right card plate are respectively fixed on the left end surface and the right end surface of the shaft blank; and pin-hinging holes are drilled at the left card plate and the right card plate respectively. Both ends of a shaft assembly are provided with a special pallet which is fixedon the shaft assembly stably with bolts and pins; the eccentric holes on various pallets are used when the eccentric part is processed; the position of the bolts and the pin-hinging holes on the shaftassembly determines the eccentricity of the shaft assembly; and after the one-off survival of the centric shaft surface and the end surfaces is completed, the pallets are used for assisting to process the survival of the eccentric part; therefore, the technique process is completed. The method has the advantages of simplifying processing procedures, saving raw materials, improving the efficiencyof mass production and ensuring the quality of workpieces.

Description

technical field [0001] The invention belongs to the field of mechanical processing, and particularly relates to a processing method for a shaft with a small eccentric distance. Background technique [0002] Eccentric shaft is one of the important and common parts in various machinery. It is difficult to process and loses a lot. It has always been a key research topic in turning processing, such as automobile crankshafts and crankshafts of various diesel engines. At present, for the shaft with small eccentric distance, due to the close distance between the two pairs of center holes, it is impossible to process the two pairs of center holes at the same time, and the shaft can be processed at one time, resulting in complicated and tedious process and high processing cost. Taking the manufacturing scheme of the three-roll centering eccentric shaft for rolling mills as an example, the maximum diameter of the three-roll centering eccentric shaft is φ164mm, the minimum diameter is ...

AI Technical Summary

Problems solved by technology

Production of small eccentricity shafts according to the above-mentioned traditional process involves complex procedures and cumbersome working steps, which increases unnecessary cutting volume, processing difficulty, labor and machine tool costs, etc., resulting in prolonging the processing cycle and sharply increasing the processing cost and the cost of alloy steel raw materials.

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