A study on stress and vibration analysis of a steel and hybrid flexspline for harmonic drive

Jeon, Han Su; Oh, Se Hoon

doi:10.1016/s0263-8223(00)00060-x

Cited by 39 publications

(22 citation statements)

References 2 publications

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“…HDs offer several advantages with respect to conventional spur gear transmissions, including better mass-to-torque ratio and smaller overall dimensions than a spur gear equivalent. Since HDs have a flexible component and several teeth engaging simultaneously during the transmission, there is damping factor that is four to five times better than the spur gear counterparts (Jeon & Oh, 1999). The flexible teeth gearing results in theoretically zero backlash.…”

Section: Harmonic Drive Part Consolidationmentioning

confidence: 99%

Part Consolidation for Additive Manufacturing Demonstrated in the Design of a 3D-Printed Harmonic Drive

Cardona

2015

IUJUR

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The goal of this project is to establish a novel design approach for the additive manufacturing of mechanical transmission systems. Our focus is the design and 3D printing of a harmonic drive. Harmonic drives use the elastic dynamics of metals to create an elliptical rotation, which is what conceives the reduction of speed of the outer piece. Additive manufacturing is used to achieve more complex and precise mechanical structures. Components of less complexity will be 3D printed with polymer and commercial parts will be purchased. There is a need for the creation of new plastics manufacturing processes that define and simplify the decision methods involved in the production. With this project, we will establish the process we consider best for plastic additive manufacturing. The decision of which parts are 3D printed or machined affects the harmonic drive’s cost and lead-time; therefore, several alternatives are systematically analyzed. The final bill of materials contains the list of commercial parts and 3D printed parts. When assembled, a functioning harmonic drive is produced. The final harmonic drive is experimentally tested to determine the life of its components when subjected to working loads. The methods used in this research include the part consolidation for the optimization of the system, transcription of 3D models to STL files that can be printed, polymer additive manufacturing and traditional quality control techniques to improve the design. Material models utilized in this project are commercial aluminum parts, 3D printer and plastic, and a low-voltage power motor. The complete set of results will give torque and speed reduction ratios that will be compared to those previously obtained by electronic simulations. This locates us a step ahead in the creation of an optimal process for additive manufacturing.

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Section: Harmonic Drive Part Consolidationmentioning

confidence: 99%

Part Consolidation for Additive Manufacturing Demonstrated in the Design of a 3D-Printed Harmonic Drive

Cardona

2015

IUJUR

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“…In a sliding-vane rotary pump (or a balanced vane-type pump) having a number of vanes which are free to slide into or out of slots in the pump rotor, two discharge cavities placed diametrically opposite each other keep the rotor in hydraulic balance, relieving the bearings of heavy loads [6,7]. Inspired by this, we conceived a new gear pump with flexible ring gear by combining the characteristics of harmonic gear drive [10,11] with the working principle of gear pump. Figure 1 presents a sketch of the new gear pump, the main components include pump body (1), end cover, pinion (2), flexible ring gear (4), sealing block (5), roller (3) and side plate (6).…”

Section: Features Of Gear Pump With Flexible Ring Gearmentioning

confidence: 99%

Which Will Win in the Gear Pump Technology

Zhu

Pan

Zou

et al. 2013

Transactions of the Canadian Society for Mechanical Engineering

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There exist three major problems in current gear pumps. They are unbalanced radial force, big excessive flow pulsation and short working life. In order to solve the problems above, a new type of gear pump with flexible ring gear is introduced. Pumping action is achieved through meshing between a flexible ring gear and a rigid external gear. Thus radial pressure forces are hydraulically balanced and the volumetric displacement is doubled for the new pump.

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“…More recent papers include numerical analysis of the optimization of both -the parameters of a toothed rim as well as the shape of the body of a flexspline, mainly with the use of the FEM method (Folęga, 2015;Kikuchi et al, 2003;Kleiber and Zacharski, 1983) and the boundary element method (Folęga, 2009;Li, 2016). Only a few articles (Jeon and Oh, 1999;Pacana, 2018;Pacana and Markowska, 2016;Tjahjowidodo et al, 2013) present conduction and results of stationary research on an actual harmonic drive related to calculation of stress in elements of the drive and its durability. The vast majority of papers present issues concerning typical harmonic drives with a short flexspline of an annular type.…”

Section: Introductionmentioning

confidence: 99%

The impact of the structural form on the stress distribution in a flexspline of a hermetic harmonic driver

Pacana

2020

Journal of Theoretical and Applied Mechanics

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This paper presents a comparative analysis with different models of the flexspline for a harmonic hermetic drive. The flexspline is a thin-walled construction, deforming during work, so its design is a very complicated process. The paper contains a strength analysis for some selected models of this gear. Calculations were performed using the finite element method (FEM) in ADINA. The work presents stress diagrams in longitudinal intersections for susceptible wheels of different shapes for direct comparison. Suggested changes in construction of the flexspline will increase durability of a welded hermetic gear.

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A study on stress and vibration analysis of a steel and hybrid flexspline for harmonic drive

Cited by 39 publications

References 2 publications

Part Consolidation for Additive Manufacturing Demonstrated in the Design of a 3D-Printed Harmonic Drive

Part Consolidation for Additive Manufacturing Demonstrated in the Design of a 3D-Printed Harmonic Drive

Which Will Win in the Gear Pump Technology

The impact of the structural form on the stress distribution in a flexspline of a hermetic harmonic driver

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