Cam profile optimization for the delivery system of an offset press

Abstract

In this paper, a relatively new strategy known as unified optimization is applied to the cam profile optimization for the delivery system of an offset press by integrating the procedure of single objective optimization with ADAMS software. The proposed approach mainly consists of two parts that includes a single objective optimization procedure and a multibody dynamic model of cam–follower mechanism. For the procedure of single objective optimization, the design process starts from defining the follower acceleration profile by using a modified trapezoidal curve, then genetic algorithm is adopted to determine the evaluating indexes for the kinematic behavior of cam–follower mechanism in multiobjective optimization. Subsequently, sequential quadratic programming, which deals well with equality and inequality constrains, is selected as single objective optimized algorithm in this part. On the other hand, the dynamic simulation developed by ADAMS software is carried out to investigate the dynamic characteristics of cam–follower mechanism. Finally, an optimization cycle, also known as iterative process, is proposed to implement the procedure of single objective optimization and dynamic simulation alternately to improve the kinematic and dynamic characteristics of cam–follower mechanism fully. The cam profile optimization method presented in this paper provides a new tool for cam designers to avoid the undesirable impact and follower jump.

Extraction Methods and Implementation Technologies of Fuel Injection Pump Cam Profile Characteristics

“…So long as the phase information of the optimal lift, where the top dead center is located, is calculated, the actual phase information of the top dead center can be calculated. So, in a certain angle range of the optimal lift data with a fixed rotation step, the lift value at the theoretical angle after each angle rotation is approached by Lagrange interpolation polynomial, and an objective function is established [29]. e objective function consists of the sum of the squares of the lift errors at the theoretical phase of the top dead center and some points near its two sides.…”

Design and optimization of the transition curve in the novel profiled chamber metering pump

“…In the following analysis, the denotations as follows are used for the simplicity of expressions It is clear from the above analysis that the normal force (and therefore the friction force) between the slides and the inner chamber surface is greatly dependent on the shape of the transition curves through the relations between the forces and q(), 0 ð Þ, and 00 ð Þ shown in equation (13). Take the TC-P(n ¼ 7) transition curve for example, the curves of " F NÀthrÀI and " F NÀthrÀIII are shown in Figure 7(a); " F NÀÀI = 2 " F r þ " F eÀ À Á and "…”

“…In the field of cam curve study, dynamic analysis is an essential content for optimization of the cam curve. [10][11][12][13] A fundamental method to do this is using motion parameters, velocity (V), acceleration (A), and jerk (J) of follower as controlling conditions to construct objective cam curves, and as a result, one or more dynamic performance indexes that affect vibration, impact, contact stress, frictional resistance, wear, and kinetic loss can be limited at a lower level. The method is called the V-A-J method, V-A-J analysis, or motion analysis in this paper.…”

Theoretical study on the influence of structural parameter errors on the end trajectory accuracy of cam manipulators

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