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Indexed by:期刊论文

Date of Publication:2012-01-01

Journal:Advanced Science Letters

Included Journals:Scopus

Volume:8

Page Number:702-707

ISSN No.:19366612

Abstract:This paper presents a conjugate model and a method for determining the cutter (grinding wheel) geometry to ensure sufficient precision for grinding a screw rotor (workpiece). With the conjugate model, the cutter geometry parameters can be determined from the tooth profile of the workpiece, vice versa. The cutting parameters include the distance (feeding parameter) and position angle between the centerlines of the cutter and the workpiece. To consider the effect of cutter wear on the grinding precision, the tooth profile in the transverse plane is measured at the end of a rough, or semi-finish cut for each tooth profile; the cutter geometry is obtained from the conjugate model; machining error of the tooth profile and allowance for finish are then determined. In the subsequent grinding, the processing parameters are determined from the rotor error evaluation and compensation approach, which compensates the amount of cutter wear that is resulted in the previous cut. If the amount of the adjustment to the center distance and angle exceeds the threshold, optimal parameters with minimal amount of grinding wheel dressing are pursued to prolong the cutter life. The proposed methodology is programmed into a computer program written in MATLAB. Numerical results obtained from the program show the validity and feasibility of the proposed method. ? 2012 American Scientific Publishers. All rights reserved.