Alignment Method for Positioning and Alignment of Inner Splines of Slender Camshaft

Abstract

The invention discloses a locating aligning method for inserting an internal spline into a slender cam shaft. The method comprises the steps: 1) preparing a spline housing and a spline hoop; 2) sleeving a to-be-processed cam shaft workpiece by the spline hoop, wherein the spline hoop and the to-be-processed cam shaft workpiece are fixed together; 3) processing a locating blind hole and a locating threaded hole in the spline hoop; 4) sleeving the large end of an inner hole of the spline housing into the end portion of the to-be-processed cam shaft workpiece and connecting the spline housing to the spline hoop by virtue of a locating pin and a threaded pin; 6) clamping the assembled spline housing, spline hoop and to-be-processed cam shaft workpiece on a gear slotting machine, and taking down the spline housing after a slotting cutter aligns the internal spline tooth; and 7) inserting the spline to the end surface of the to-be-processed cam shaft workpiece. According to the method disclosed by the invention, the angle of the internal spline of the slender cam shaft is precisely controlled, the debugging error in final assembly is reduced, the time is shortened and the difficulty is reduced, and the timing adjusting precision of a cam shaft assembly is improved, and the method is suitable for slender cam shaft workpieces of various similar structures.

Description

technical field [0001] The invention belongs to the field of machining technology, and in particular relates to a method for positioning and aligning splines inserted into an elongated camshaft. Background technique [0002] The camshaft is the key moving part of a diesel engine. The camshaft on a certain large-scale equipment that the applicant is developing has a length of 833mm, a maximum outer diameter of Ф41mm, and a length-to-diameter ratio of ≥20, which is a typical slender shaft product. The internal spline processing of the camshaft is the last process. The bottom of the internal spline is a blind hole, and the outer end is an optical shaft without any screw holes and pin holes. Ensure the angle relationship between the center of the keyway in the spline and the Ф4 positioning pin hole at the other end, and the error is controlled within ±30'. [0003] In order to make the internal spline of the camshaft meet the above requirements, according to the previous proce...

AI Technical Summary

Problems solved by technology

After the trial insertion of the spline, the three-coordinate detection has reached 1 º~1.5 º, and the angle requirements of the design drawings cannot be guaranteed at all.

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