Use of Numerical Method for Determination of Contact Points Position in Roller Screw Threads

Mikhail Evgenievich Fedosovsky¹, Sergei Andreevich Aleksanin¹ and Roman Vladimirovich Puctozerov²

¹State Institute of Technology Saint-Petersburg Russia, Russian Federation,190013, Saint Petersburg, Moskovsky prospect, 26, Russian. ²Baltic State Technical University «VOENMEH» named after D.F.Ustinov, Russian Federation, 190005, Saint Petersburg, str 1 Krasnoarmeyskaya ,1, Russian.

ABSTRACT: This article proposes a versatile numerical method for determining position of initial contact points between rollers, screw and nut in different types of roller-screws characterized by the contact search by the one side of the thread, the possibility to change the workpiece diameter or interaxle distance according to the basis of construction. finding the real dimensions of the part, as well as its positive or negative allowance demands only one iteration. The features of roller screws, affecting the position of initial contact points in transmission mating threaded surfaces are considered in article. Examples on points of contact position calculations are provided for different types of roller screws. These calculations were accomplished with the help of special software developed on the basis of the method.

KEYWORDS: Planetary roller screws; The numerical algorithm; Points of contact position; CAD system

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