Wyniki wyszukiwania - Biblioteka Nauki

1

Analiza śladu styku w globoidalnej przekładni ślimakowej z obrotowymi zębami

100%

Jagiełowicz P. E.

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2017

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tom nr 12

15--17

PL

W artykule przedstawiono analizę śladu styku w funkcji obrotu kół globoidalnej przekładni ślimakowej z obrotowymi zębami. W celu określenia śladu styku w systemie CAD została wykorzystana bezpośrednia bryłowa metoda analizy geometrii. W przekładni zastosowano ślimak globoidalny, a klasyczną ślimacznicę zastąpiono kołem z obrotowymi zębami w kształcie ściętych stożków. W omówionej metodzie wykorzystano systemy CAD – AutoCAD oraz Inventor.

EN

The tooth contact analysis in the wheel rotation function of the globoidal worm gear with rotary teeth was presented. To determine the contact in CAD system, the direct solid method of geometry analysis was used. In the gear the globoidal worm gear was used, and the classical worm wheel was replaced by the wheel with rotary teeth in the shape of the frustum of cone. In this presented method the CAD – AutoCAD and Inventor systems were used.

2

Globoidalna przekładnia ślimakowa z obrotowymi zębami z samoczynnym kasowaniem luzu

63%

Sobolak M. , Jagiełowicz P. E.

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2014

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tom nr 6

9802--9806

PL

W przedstawionym artykule pokazano globoidalną przekładnię ślimakową z obrotowymi zębami. W przekładni zastosowano ślimak globoidalny a klasyczna ślimacznica została zastąpiona kołem z obrotowymi zębami o kształcie ściętych stożków. Stożkowy kształt zębów wynika z potrzeby minimalizacji poślizgu między zębami a powierzchnią ślimaka. Zęby wykonane są jako obrotowe. Obrót zęba wraz z odpowiednim kątem powierzchni stożkowej pozwala na minimalizację poślizgów. Zęby mają możliwość osiowego przesuwu. Zęby dociskane są do powierzchni ślimaka za pomocą osiowych sprężyn co pozwala na kasowanie luzu.

EN

The globoidal worm-gear, with rotary teeth was presented. In the gear the globoidal worm gear was used, and the classical worm wheel was replaced by the wheel with rotary teeth in the shape of the frustum of cone. The frustum of cone shape is needed because of minimization of the slippage between the teeth and the surface of the worm gear. The gear teeth have the helical shape. Rotation of the teeth, having appropriate angle of the conical surface, helps to minimize the slippage. In addition, the teeth are able to displace axially. In use the teeth are pressed against the worm surface by the push springs. It allows to eliminate the backlash and improve the gear operation.

3

The methods of globoid surface modeling in CAD

63%

Sobolak M. , Jagiełowicz P. E.

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2016

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tom Vol. 81, nr 2

76--84

EN

Purpose: Modeling of globoid worm surface is a difficult issue of modeling of complex surfaces in CAD. Worm gears are a challenge for designers because of the construction and the functions that have to be met, as well. There are very few specialized applications to generate this type of gears. The software intended to model of the worm gear wheel only is not accessible, so basing on general intending CAD systems is a necessity. Modeling of globoid worm surface can cause the problem. The examples of globoid helical surfaces modeling in CAD are accessible on the Internet, but often they are not correct in terms of geometry and they do not reflect the actual geometry. These surfaces are modeled on the helix with uniform pitch but diameter variable only. The worm gear development, including these atypical ones, requires looking for new solutions in their modeling. Design/methodology/approach: The three methods of the globoid surface modeling, using CAD systems - AutoCAD and CATIA were presented. The modeling was carried out on the example of the warm lateral surface of the globoidal worm gears. In the first presented method the external program, that generates the script commands for AutoCAD system and lets generate the points of the globoid helix, was used. In the following two methods to model helixes, the possibilities of CATIA were used: creating the graph of two-dimension functions and comprising them into tree-dimension function and kinematic simulation, as well. In the globoid helix the pitch variation is included. Findings: The described methodologies are universal and allow to generate the globoid lateral-surface of worm on the basis of wormwheel constructional assumption and taken tooth profile. The advantages of CAD systems and their usefulness in the globoid worm gear designing are highlighted in the article. Research limitations/implications: The main problem concerned the method No. 3 that uses a kinematic simulation of CATIA. The number of simulation “frame” is the limitation. Practical implications: The proper modeling of worm gear geometry in CAD allows to analyse the geometric cooperation, strength (by the finite element method), or to make a prototype for the preliminary tests with using of the rapid prototyping techniques. Originality/value: All three presented methods are innovative and allow to provide a correctly modeled globoid surface as a basis to create a complete model of the globoid worm.

4

Design of polymer gears for auxiliary power transmission systems of automotive vehicles

51%

Budzik G. , Sobolak M. , Jagiełowicz P. E.

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tom Vol. 17, No. 4

73-77

EN

he polymer gears owing to their advantages are used in auxiliary power transmission systems of automotive . For example, the gears occur in transmissions of drives of car wipers or drives of car windows. The polymers are mainly used owing to lower production cost than in steel gears. The better silent-running and corrosion z are their other advantages in comparison with steel gears. Unfortunately, the polymer gears are not devoid of disadvantages. The main disadvantages are the lower efficiency and the lower capacity and what follows — the bigger dimensions. The conservative attitude of design of polymer gears is still noticeable. As a rule, such gears e steel gears, but the polymer gears are designed with bigger module. The most probably owing costs and lack of proper design recommendations, for design of polymer gears is used geometry of classic steel gears, because the procedure of analytical strength calculations for classic gears is well-know. The gears made from polymers are built in the mould matrices. In constructions of many mechanisms, the gears can be replaced in case of consumption or damage, so the construction of such gears that can be produced in the machine shop equipped with gear generating e for standard gears, was justified. Nowadays, the constructions of mechanisms used in automotive vehicles are often not even dismountable, but the whole mechanism is changed. It is worth changing the attitude to design of such transmissions. The method of gears production gives many opportunities. The production of gears with ited geometry, also such geometry that is impossible to obtain using traditional methods of machining, is possible in the mould matrices.