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ÖÐͼ·ÖÀàºÅ£ºTH16£»TH114 ÎÄÏ×±êÖ¾Â룺A doi£º10.3969/j.issn.1006-0316.2022.10.002

ÎÄÕ±àºÅ£º1006-0316 (2022) 10-0008-07

Working Principle and Error Analysis of CNC Lathe for Polygonal Shaft Parts Based on Electronic Transmission Ratio

NI Mingwei£¬LUO Hongbo

( School of Mechanical Engineering, Sichuan University, Chengdu 610065, China )

Abstract£ºPolygonal shaft parts have the characteristics of keyless connection and are widely used in many transmission scenarios, but the traditional machining methods have the disadvantages of low accuracy and low efficiency. In recent years, a method of turning polygon axes with two axes turning in the same direction has been proposed. This paper aims to reduce the flatness error of turning polygon axes on CNC lathes. Based on the molding principle of polygon axis, the geometric model of the tool tip trajectory was established and the trajectory equation of the tool tip was analyzed. The simulation trajectory of the polygon axis section with different number of edges was obtained by substituting the trajectory equation of the tool tip into MATLAB. After geometric analysis of the simulation trajectory, the expression of the section straightness error is obtained, that is, the machining error can be obtained by adjusting the machining parameters in the actual machining. According to the above methods, the machining parameters required by different edge shapes to meet the flatness error (not more than 0.025 μm) of the project were finally obtained.

Key words£ºelectronic transmission ratio£»polygon axis£»error analysis£»the MATLAB simulation

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