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Professore Ordinario presso: Dipartimento di Ingegneria "Enzo Ferrari"

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2008 - Designing Synchronous Belt Transmissions With Variable Velocity Ratio [Articolo su rivista]
Innocenti, Carlo; Paganelli, D.

The paper presents a new procedure to design a two-pulley synchronous belt transmission connecting, with no belt tensioner, two parallel-axis shafts with a variable velocity ratio. The procedure takes into account the limited number of choices for pitch and length of off-the-shelf synchronous belts, which translates into the need of fine-adjusting either the center distance or the law of motion. Differently from other approaches reported in the technical literature, the suggested method is based on the numerical solution of a set of functional equations. A numerical example shows application of the proposed method to a case study.

2008 - Optimal Choice of the Shaft Angle for Involute Gear Hobbing [Articolo su rivista]
Innocenti, Carlo

With reference to the machining of an involute spur or helical gear by the hobbing process, the paper suggests a new criterion for selecting the position of the hob axis relative to the gear axis. By adhering to the proposed criterion, the hob axis is set at the minimum distance from the gear axis, thus maximizing the depth of the tooth spaces of the gear. The new criterion is operatively implemented by solving a univariate equation, which stems from a new, synthetic analysis of the meshing of crossed-axis involute gears. A numerical example shows application of the suggested procedure to a case study and compares the optimal hob setting to the customary one.

2008 - The Kinematics of Conical Involute Gear Hobbing [Articolo su rivista]
Innocenti, Carlo

The paper is aimed at finding all relative rigid-body positions of two conical involute gears that mesh together with no backlash. The results are then specialized to determine two key setting parameters for a hobbing machine that has to cut a conical involute gear. A numerical example shows application of the presented results to a case study.

2006 - Position Analysis of the RRP-3(SS) Multi-Loop Spatial Structure [Articolo su rivista]
Innocenti, Carlo; P., Wenger

The paper presents the position analysis of a spatial structure composed of two platforms mutually connected by one RRP and three SS serial kinematic chains, where R, P, and S stand for revolute, prismatic, and spherical kinematic pair respectively. A set of three compatibility equations is laid down that, following algebraic elimination, results in a 28th-order univariate algebraic equation, which in turn provides the addressed problem with 28 solutions in the complex domain.Among the applications of the results presented in this paper is the solution to the forward kinematics of the Tricept, a well-known in-parallel-actuated spatial manipulator.Numerical examples show adoption of the proposed method in dealing with two case studies.