Browsing by Subject "gears"

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  • Analytic description of teeth profile of gears with rollers ab and justification of precessional gear parameters selection a 
    BOSTAN, Ion; DULGHERU, Valeriu; BOSTAN, Viorel (Technical Sciences Academy of Romania, 2020)
    The engineering complex study of the triad “gear-technology-transmission” has permitted to elaborate a new type of mechanical transmission – planetary precessional transmissions with multicouple gear. In this paper, the ...
  • Analytical description of precessional nonstandard tooth profile 
    BOSTAN, I.; DULGHERU, V. (Transilvania University Press, Brasov, Romania, 2016)
    The engineering complex study of the triad “gear-technology transmission” has permitted to elaborate a new type of mechanical transmission – planetary precessional transmissions with multicouple gear. In this paper, the ...
  • Aspecte privind elaborarea teoriei angrenajului precesional multiplu şi a tehnologiei moderne de fabricare 
    BOSTAN, Ion; DULGHERU, Valeriu (Asociaţia Generală a Inginerilor din România, AGIR, 2004)
    Studiul ingineresc complex al triadei angrenaj-tehnologie-transmisie a permis elaborarea unui tip nou de transmisie mecanica – transmisia precesională cu angrenaj multiplu, care din punct de vedere tehnologic, poate fi ...
  • Axial adjustment method for precessional transmissions 
    BOSTAN, I.; MAZURU, S.; TOCA, A.; CASIAN, M. (Editura Universităţii Ştefan cel Mare din Suceava, 2017)
    Axial adjustment method for precessional transmissions includes the compensation error calculation and the determination compensator groups, achieved in the form of base and auxiliary rings. The compensator has on the base ...
  • Characteristics of materials and thermal treatments applied to gearwheels obtained by plastic deformation 
    BOSTAN, I.; DULGHERU, V.; TRIFAN, N. (IOP Publishing, 2016)
    A variety of materials are used in the manufacture of gearwheels. These materials satisfy various working conditions for gears. Such gears are made of metallic materials - ferrous, non-ferrous and from plastic materials. ...
  • Constructive methods to ensure the accuracy of technological-quality indicators gears 
    MAZURU, Sergiu; METELSKI, Vitali (ModTech Publishing House, 2012)
    One of the problems of modern engineering is to increase the reliability of critical machine parts, which is largely determined by their performance characteristics and quality of the surface layer. Due to the increasing ...
  • Contributions to the generation of precessional gear teeth by plastic deformation 
    TRIFAN, Nicolae; CIOBANU, Radu; HRISTEA, Alexandru Mihai; TUDOR, Bogdan Alexandru; DUMITRU, Daniel (University Politehnica, Timisoara, 2021)
    Gears are machine parts that occupy an essential place in the operation of various mechanical constructions. The execution of the gears at a high quality level and at a low cost, puts in front of the specialist multiple ...
  • Design optimization of the satellite in precessional transmission 
    LEALIN, Stanislav (EDP Sciences, 2018)
    One of the important tasks in the design of gears and gearboxes based on them is to increase the load capacity, durability and noise reduction with moderate requirements for manufacturing precision by providing elastic ...
  • Development of Planetary Precessional Transmission with Multicouple Gear 
    BOSTAN, Ion; DULGHERU, Valeriu (Springer Nature Switzerland, 2013)
    Some problems of mechanical transmissions can be solved with special effects by developing new types of transmissions based on planetary precessional transmissions with multiple gear, that were developed by the authors. ...
  • Dispozitiv pentru controlul roţilor conice 
    BOSTAN, Ion; DULGHERU, Valeriu (Agenţia de Stat pentru Proprietatea Intelectuală (AGEPI), 1996-10-31)
    Invenţia se referă la construcţia de maşini şi poate fi utilizată, în special în domeniul controlului roţilor dinţate conice. Scopul invenţiei constă în lărgirea posibilităţilor funcţionale prin asigurarea posibilităţii ...
  • Generation of precessional gear teeth by plastic deformation 
    TRIFAN, N.; CIOBANU, R.; CIOBANU, O. (IOP Publishing, 2021)
    The correct choice of the dimensions of the workpiece product is one of the main problems, the solution of which depends on the reduction of the consumption of materials and energy, as well as the quality of the wheels ...
  • Generation of precessional gearing with convex-concave contact 
    VACULENCO, Maxim; SCATICAILOV, Serghei; MAZURU, Sergiu; BOSTAN, Viorel; BOSTAN, Ion (Romanian Inventors Forum, 2020)
    The development of the robotics and mechanical systems with compactness restrictions impose to the gear ever more stringent requirements regarding the mass and gauges, the quality of the gear material, the technological ...
  • The imaginary generating rack-bar determination to the curved spur gears rolling processing 
    BOJAN, Şt.; SUCALĂ, F.; BÂRLEANU, C.; TĂTARU, O. (Editura U.T.M., 2003)
    Rolling tooth processing system, which is the most used procedure, is based on the principle that the surfaces in meshing are reciprocal winding surfaces In a gearing meshing, besides the two active surfaces there are also ...
  • Nonstandard teeth profile description and justification of precessional gear parameters selection 
    BOSTAN, I.; DULGHERU, V. (IOP Publishing, 2019)
    Teeth profiles have an important role in the efficient transformation of motion in the precessional transmissions. Multiple precessional gear theory, previously developed, did not take into consideration the influence of ...
  • Power losses estimation in precessional gear 
    BOSTAN, Ion; DULGHERU, Valeriu; BODNARIUC, Ion (ICTCM – CITAf - OID.ICM, 2007)
    The planetary precessional transmissions represent a new principled type of the mechanical transmission. The specific of the relative sphere-spatial movement of the precessional gearing elements makes the sliding friction ...
  • Precessional planetary transmission 
    BOSTAN, Ion; DULGHERU, Valeriu; VACULENCO, Maxim; BODNARIUC, Ion; CIOBANU, Radu; CIOBANU, Oleg; MALCOCI, Iulian; SLOBODEANIUC, Stanislav (Romanian Inventors Forum, 2023)
    The technical result of the invention consists in the following: compensation of the execution errors of the transmission parts, which influence the position of the contact point in the gear (eccentricity of the inclined ...
  • Prelucrea angrenajelor precesionale cu discuri din materiale dure 
    MAZURU, Alexandru (Universitatea Tehnică a Moldovei, 2021)
    To provide the increased resistance and efficiency of mechanical transfers, it is necessary to change technology of final processing of cogwheels. For grinding it is offered to use disks from cubic nitride of a pine forest ...
  • The processing accuracy of the gear 
    MAZURU, Sergiu; CASIAN, Maxim; SCATICAILOV, Serghei (EDP Sciences, 2017)
    The paper presents analysis of processing quality of gears. A special attention was drawn to detecting and removing burns, the existence of which greatly reduced operating properties of gears. The study emphases the influence ...
  • Sistem de angrenare, procedeu de fabricaţie și dispozitiv de realizare 
    DULGHERU, Valeriu; BOSTAN, Ion; CIOBANU, Radu; CIOBANU, Oleg (Universitatea Tehnica din Cluj-Napoca, 2021)
    Procedeele de fabricație prin proces aditiv se realizează în modul următor. Prin procedeul de fabricație aditivă în mod tradițional cu un cap de aditivare sau mai multe succesiv se realizează roata dințată prefabricat din ...
  • Sistem tehnologic de generare a danturilor roţilor angrenajelor precesionale prin deformare plastică cu sculă precesională 
    TRIFAN, N. (Editura U.T.M., 2011)
    O tehnologie din ce în ce mai răspândită devine deformarea plastică la rece a roţilor dinţate, asigurându-se, astfel o serie de avantaje faţă de procedeele clasice: consum redus de materiale şi energie, strat superficial ...

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