Device and method for implementing zero theoretical locating errors of key slot dimensions in shaft

Abstract

The invention discloses a device and method for implementing zero theoretical locating errors of key slot dimensions in a shaft. The device comprises a base, a gear transmission mechanism and a shaft locating mechanism, wherein the gear transmission mechanism and the shaft locating mechanism are arranged on the base; the shaft locating mechanism comprises two slope locating pieces, a bottom surface locating piece and a hold-down mechanism; the two slope locating pieces symmetrically and inclinedly form a V slot; the bottom surface locating piece is positioned right below the V slot; the hold-down mechanism is positioned above the V slot; and the two slope locating pieces are connected with the gear transmission mechanism and are driven by the gear transmission mechanism to synchronously overturn. The V slot, which is formed by the two symmetrical slope locating pieces capable of synchronously overturning, the two sides and bottom surface of the fixed bottom surface locating piece locating shaft, and the top surface of the hold-down mechanism locating shaft are utilized to clamp the shaft to be processed. The method and device can simultaneously ensure the ideal precisions of zero dimension error in the key slot depth direction and zero position error of degree of symmetry in the key slot width direction.

Description

technical field [0001] The invention relates to the technology in the field of keyway machining and positioning on a shaft, in particular to a device and method for realizing zero theoretical positioning error of the keyway size and position on a shaft. Background technique [0002] like figure 1 As shown, it is the cross-sectional machining dimension of the keyway 71 on the shaft 70, the width is b, the depth of the keyway 71 is determined by H, and the symmetry accuracy of the keyway 71 must be ensured. At present, there are three common positioning schemes for processing this type of keyway 71, which are respectively V-shaped block positioning, mandrel positioning (if the shaft to be processed is a hollow shaft) and fixed bearing surface positioning. like figure 2 As shown, when the V-shaped block is used for positioning and processing, the high-precision symmetry of the keyway 71 can be guaranteed, so that the position error of the keyway 71 is zero, but due to the di...

AI Technical Summary

Problems solved by technology

Therefore, there are certain size or position errors in the above three positioning methods, which cannot achieve the ideal accuracy of zero size errors and position errors, and cannot meet high-precision processing requirements in some occasions.

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