A precision grinding method for eccentric circle of crankshaft and special eccentric fixture

Abstract

The invention relates to a precision grinding method for the eccentric circle of a crankshaft and a special eccentric tool fixture. The method mainly comprises the following steps that 1, a base of the eccentric tool is connected with a machine tool spindle; 2, an eccentric adjustment sleeve is installed, and an eccentric reference zero position is determined; 3, the crankshaft is installed; 4, the eccentric adjustment sleeve is moved up and down through eccentric adjustment nuts to achieve accurate control over the eccentricity, and eccentric external grinding on one side of the part is performed; 5, the eccentric adjustment nuts are reversely adjusted to move the eccentric adjustment sleeve reversely, it is ensured that the eccentricity is equal to that in step 4, eccentric external grinding on the other side of the part is performed, and finally part machining is completed. Based on a conventional external grinding machine, the eccentricity-adjustable dual-eccentric grinding tool and a part machining process scheme thereof are developed, which are a completely independent design proposed for the first time in China.

Description

technical field [0001] The invention relates to the technical field of machine tool processing, in particular to a precision grinding method for an eccentric circle of a crankshaft and a special eccentric fixture. Background technique [0002] The crank shaft is the core force transmission part of the RV reducer for robots. The machining accuracy of the crank shaft directly affects the transmission accuracy of the RV reducer. The difficulty in manufacturing this part lies in controlling the dimensional accuracy of the double eccentric outer circle, the machining accuracy of The indexing accuracy of eccentric 180° and the position accuracy of eccentric direction and end face spline. At present, there are basically two ways to process the crankshaft: one is the follow-up grinding machine tool, which realizes eccentric circle processing through the interpolation movement of the machine tool itself, but the equipment cost is expensive; the other is on the conventional cylindrica...

AI Technical Summary

Problems solved by technology

At present, there are basically two ways to process the crankshaft: one is the follow-up grinding machine tool, which realizes eccentric circle processing through the interpolation movement of the machine tool itself, but the equipment cost is expensive; the other is on the conventional cylindrical grinding machine, using Eccentric tooling processing, although the equipment cost is low, but in order to ensure high-precision eccentricity requirements, the requirements for eccentric tooling are very high

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