[논문]워엄기어 감속기의 출력피니언 최적설계와 해석

조성현; 김현경; 김동선; 진진; 류성기

doi:10.14775/ksmpe.2020.19.01.108

워엄기어 감속기의 출력피니언 최적설계와 해석
Optimization and Analysis of Output Pinion Design for Worm Gear Reducer 원문보기

Pinions are generally heavy and integrated with a shaft. Thus, fabricating a pinion is a material- and machining-intensive task characterized by low productivity. Contact of the output pinion with a sliding surface or a cloud contact causes loss of power because of friction. Consequently, the output pinion undergoes considerable wear and tear at its ends, which adversely affects the overall transmission efficiency of decelerators. To improve transmission efficiency and extend gear life, an optimum output pinion design is required. To this end, in this study, an output pinion for worm gear decelerators was designed and optimized by means of product verification through prototyping and performance evaluation to improve gear life and productivity. The optimized design was validated and subjected to structural analysis.

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문제 정의

To improve transmission efficiency and extend gear life, an optimum output pinion design is required. Therefore, this study aims to develop an output pinion for worm gear decelerators that is optimized by product verification through prototyping and performance evaluation to improve gear life and productivity.
This study aimed to optimize and analyze the design of a 5-ton output pinion for use in special-purpose industrial machinery to increase transmission efficiency and gear life. To achieve the final objectives, geometry design and simulations, respectively, were performed in this study.

제안 방법

A three-dimensional model of an output pinion was designed using CATIA V5 (Dassault Systemès, France), a CAD/CAM software package, based on the result of output pinion and tooth profile modification (Fig. 1).
Many researchers have focused on worm gears and worm wheels. However, given that pinion gears play an important role in a gearbox, this study focused on the optimization of intermediate 5-ton class pinions. A three-dimensional model of an output pinion was designed using CATIA V5 (Dassault Systemès, France), a CAD/CAM software package, based on the result of output pinion and tooth profile modification (Fig.
Profile refers to the shape of the involute curve from the tooth root to the tooth tip, and lead refers to the lateral shape of the gear tooth on the pitch circle. In the measurement, the center of rotation of the gear was employed as a measurement standard by using a toothed measuring machine, and both the right and left tooth surfaces were measured for 1, 4, 7 and 10th. In KS B 1405, spur gears are classified into nine grades according to the purpose of use.
The structural analysis, which involved identification of the optimum tooth profile modification by using ANSYS, confirmed improvements to the efficiency and structural safety of the output pinion. However, as mentioned above, in case of the output pinion of a worm gear reducer, abrasion and breakage occur mostly at the tip.
To achieve the final objectives, geometry design and simulations, respectively, were performed in this study. The theoretical design of the 5-ton class pinion gear was optimized to verify the resulting performance improvement. The accuracy of the prototype was measured while optimizing the tooth surface load distribution by modifying the profile and lead tooth surface by using Romax Designer.
This study aimed to optimize and analyze the design of a 5-ton output pinion for use in special-purpose industrial machinery to increase transmission efficiency and gear life. To achieve the final objectives, geometry design and simulations, respectively, were performed in this study. The theoretical design of the 5-ton class pinion gear was optimized to verify the resulting performance improvement.
To examine the structural stability of the output pinion, structural analysis was performed using ANSYS (ANSYS, INC., PA, US), a structural analysis program. In the pinion analysis, two pins of the same pinion were brought into contact, and a rotational force was applied to investigate their deformation, stress, and strain rate.

대상 데이터

A high-strength gear steel SCM420H was selected as the pinion material.
7. The gear test equipment (Model: UMM850, manufacturer: ZEISS, gear measurement: GEAR PRO involute). The dimensions of the gear were as follows: m (module) = 10 mm, z (number of teeth) = 10, D (pitch circle diameter) = 100 mm, and b (width) = 10.

이론/모형

The theoretical design of the 5-ton class pinion gear was optimized to verify the resulting performance improvement. The accuracy of the prototype was measured while optimizing the tooth surface load distribution by modifying the profile and lead tooth surface by using Romax Designer. The following conclusions were obtained.

성능/효과

1. The average profile error of the test gears was 44.375 μm, mean lead error was 17.875 μm, average pitch error was 15 μm, and mean runout error was 3.5 μm.
2. As a result of the structural analysis, the maximum deformation, maximum strain, and maximum stress were found to be 2.9766 e-4 m, 3.3554 e-3 m/m, and 4.3029 e8 Pa, respectively.
3. As a result of structural analysis, the maximum deformation was 2.9766 e-4 m, maximum strain 3.3554 e-3 m/m, and maximum stress 4.3029 e8Pa.

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연합인증

워엄기어 감속기의 출력피니언 최적설계와 해석
Optimization and Analysis of Output Pinion Design for Worm Gear Reducer 원문보기

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워엄기어 감속기의 출력피니언 최적설계와 해석 Optimization and Analysis of Output Pinion Design for Worm Gear Reducer 원문보기

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워엄기어 감속기의 출력피니언 최적설계와 해석
Optimization and Analysis of Output Pinion Design for Worm Gear Reducer 원문보기

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