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In order to improve the design efficiency of different types of rollers globoidal cam deceleration mechanism and standardize the design system, a parametric design method based on NX secondary development is proposed, and the design system is developed. According to the theory of space geometry and the principle of conjugate surface, the working profile equations of five typical types of rollers, including cylindrical roller, conical roller, ball-cone roller, drum roller and ball roller, and globoidal cam are deduced. The key design parameters are extracted, and the human-machine interaction design menus and dialogs are developed by using the NX secondary development tool. Combined with NX Open C/C++ API and Visual Studio compilation environment, the parametric design system of different types of rollers globoidal cam deceleration mechanism is developed. And according to the assembly constraint relationship between the components in the mechanism, the automatic assembly function is developed. The application shows that the whole system developed can meet the user's personalized design requirements, help to realize the normalization and standardization of the design process of different types of rollers globoidal cam deceleration mechanism, achieve the rapid design and modification, and shorten the design cycle.

In order to design the globoidal cam deceleration mechanism with good performance and improve the transmission performance, the working surface equation and conjugate contact equation are deduced based on the space conjugate contact principle. The constant parameters of globoid cam are preprocessed by using Creo software, and the parametric design of globoid cam deceleration mechanism is completed. According to the finite element method, the first six modes of the reducer mechanism are analyzed. The orthogonal experiment method is used to design the experimental scheme. The influence of pressure angle, rotary pitch radius, roller radius and roller width on the sensitivity of the constraint mode of the reducer mechanism is quantitatively analyzed by statistical theory and variance analysis. The results show that the variances of pitch radius and roller radius of turntable are 0.021 and 0.043 respectively, both of which are less than 0.05 and sensitive to the constraint mode of globoidal cam, followed by the pressure angle and the roller width. The results provide a basis for the study of vibration and noise of globoidal cam mechanism design.

Highlights • A method is considered for computing oscillatory Bessel transforms. • The relation between the multiple integral and simple integral is used. • The order is discussed in two cases. • Numerical experiences show the efficiency of the proposed method. Abstract Based on the relation between the multiple integral and simple integral, we propose an asymptotic rule for computing the oscillatory Bessel transforms from position to momentum space. We begin our analysis by evaluating the generalized moments. Next, we introduce the schemes of the rule in detail. In order to demonstrate the efficiency of the rule, some numerical examples based on theoretical results are presented. [ABSTRACT FROM AUTHOR]

In this paper numerical evaluation of infinite Bessel transforms with high frequency is considered. We first derive an asymptotic formula by using the integration by parts. Next we use an interpolation formula to evaluate the infinite Bessel transforms by choosing the suitable basis and nodes. The corresponding error results are proved, and numerical examples are shown to illustrate the efficiency and accuracy of the presented formulae. [ABSTRACT FROM AUTHOR]