• Title/Summary/Keyword: 스틸 휠

Search Result 9, Processing Time 0.048 seconds

Optimal Design of the Steel Wheel's Disc Hole Using Approximation Function (근사함수를 이용한 스틸휠의 디스크 홀의 최적화)

  • 임오강;유완석;김우현;조재승
    • Journal of the Computational Structural Engineering Institute of Korea
    • /
    • v.16 no.1
    • /
    • pp.105-111
    • /
    • 2003
  • Wheel for passenger car support the car weight with tires, and they transmit rolling and braking power into the ground. Whittling away at wheel weight is more effective to boost fuel economy than lighting vehicle body structure. A shape of hole in disk is optimized for minimizing the weight of steel wheel. Pro/ENGINEER program is used for formulating the design model, and ANSYS package is selected for analyzing the design model. It has difficulties to interface these commercial software directly. For Combining both programs, response surface methodology is applied to construct approximation functions for maximum stresses and maximum displacements are obtained by full factorial design of five levels. This steel wheel is modeled in 14-inch diameter of rim, and wide parameter of hole in disk is only selected as design variable for reducing the weight of steel whee. PLBA(Pshenichny-Lim-Belegundu-Arora) algorithm, which used the second-order information in the direction finding problem and uses the active set strategy, is used for solving optimization problems.

A Study on the Steering Wheel Vibration affected by the Fastening Torque of the Wheel Mounting Hub Bolts of Steel Wheels (스틸휠의 체결력에 따른 조향휠 진동에 관한 연구)

  • 안세진;정의봉;유완석;김명규
    • Transactions of the Korean Society of Automotive Engineers
    • /
    • v.11 no.4
    • /
    • pp.189-195
    • /
    • 2003
  • The steel wheels are widely used in the passenger cars because of their low cost of production although the aluminum wheels have many advantages in their performance and appearance. It is known that the steering wheel vibration with steel wheels is generated more often than one with aluminum wheels. Both the constant velocity driving test and the m up test are carried out in this study to analyze the causes and path of the steering wheel vibration generated from the steel wheels. And this study shows that the steering wheel vibration is affected by the fastening torque of the wheel mounting bolts between the steel wheel and the suspension disk.

A Study for Improvement of Cornering Fatigue Test by Eliminating a Fretting Effect on Steel Wheel to enhance Durability and Reliability (스틸 휠 굽힘 모멘트 내구시험의 내구신뢰성 개선에 대한 연구 - 스틸 휠 접촉면의 프랫팅 제거 -)

  • Chung, Soo-Sik;Jung, Won-Wook;Yoo, Yeon-Sang;Kang, Woo-Jong;Kim, Dae-Sung;Kwon, Il-Ki
    • Proceedings of the KSME Conference
    • /
    • 2008.11a
    • /
    • pp.1326-1330
    • /
    • 2008
  • The failure mode of steel road wheels in a vehicle is cracks from ventilation hole through to contact plane on steel wheel's disc plate. But a number of cracks of Cornering Fatigue Limit Test is on contact plane near to wheel nut mounting area, even though it's satisfied with specified cycles. So this paper searches out causes to improve durability and reliability of C.F.T by uni-axial bending moment test. The verified cause is a "fretting" on contact area of steel wheel. In result, this paper suggests a solution to prevent a fretting by inserting a damping shim, 0.7mm between steel wheel contact areas. Therefore this paper makes it possible to move crack position of C.F.T in steel wheel from contact plane to vehicle's failure mode.

  • PDF

A Study on the Deflection of Roller Axis of an Improved Mecanum Wheel Using the Castigliano Theorem (카스틸리아노 정리를 이용한 개선된 메카넘 휠의 롤러 축의 처짐에 대한 연구)

  • Hwang, Hui-Geon;Chung, Won-Jee;Kim, Dae-Young
    • Journal of the Korean Society of Manufacturing Process Engineers
    • /
    • v.19 no.6
    • /
    • pp.61-66
    • /
    • 2020
  • For simple and repetitive transport tasks in limited spaces such as in factories, it is more efficient to use mobile robots instead of human workers. For this reason, the reliance on mobile robots is increasing due to the increased implementation of smart factories. Currently, the structural design of the Mecanum wheel is required to ensure the stability of the moving robot since it is used for the transport of not only small products but also large products. In this paper, to improve the stability and durability of the Mecanum wheel, ways to improve the structure of the Mecanum wheel are presented. Then, using the Castigliano theorem, the structural stability is reviewed through the deflection on existing and improved structures.

Analysis of Damaged Instance and Forming Fault for Disc Part in Automotive Steel Wheel (자동차용 스틸휠 디스크부품의 성형불량 및 파손사례분석)

  • Lee, Sung-Hee;Kim, M.Y.;Kim, T.G.;Yun, H.Y.;Kang, S.W.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
    • /
    • 2006.05a
    • /
    • pp.234-238
    • /
    • 2006
  • In this research, an analysis of damaged instance and forming fault for disc part in automotive steel wheel was performed. Rolled steel material, which had been used in the manufacturing of the damaged disc part, was prepared for tensile test, quantitative analysis of chemical component and acquirement of scanning electron microscope images. Although the results of mechanical properties and chemical component ratio for the material satisfied the suggested specification, some material inherent problem was found in the scanning electron microscope images. Finally, in an analysis of chemical component for the damaged disc part used in road condition, mismatching of chemical component ratio between the suggested specification and test result was found.

  • PDF

Approximate Optimization of the Steel Wheel's Disc Hole (스틸휠 디스크 홀의 근사최적화)

  • Kim, Woo-Hyun;Cho, Jae-Seng;Yoo, Wan-Suk;Lim, O-Kaung
    • Proceedings of the KSME Conference
    • /
    • 2003.04a
    • /
    • pp.570-573
    • /
    • 2003
  • Wheels for passenger car support the car weight with tires. and they transmit rolling and braking power into the ground. Whittliing away at wheel weight is more effective to boost fuel economy that lighting vehicle body structure. A shape of hole in disk is optimized for minimizing the weight of steel wheel. Pro/ENGINEER program is used for formulating the design model. and ANSYS package is selected for analyzing the design model. It has difficulties 10 interface these commercial software directly. For combining both programs. response surface methodology is applied to construct approximation functions for maximum stresses and maximum displacements are obtained by full factorial design of five levels. This steel wheel is modeled in 14-inch diameter of rim. and wide parameter of hole in disk is only selected as design variable for reducing the weight of steel wheel. PLBA(Pshenichny·Lim-Belegundu_arora) algorithm. which uses the second-order information in the direction finding problem and uses the active set strategy. is used for solving optimization problems.

  • PDF

Evaluation of Fatigue Life and Structural Analysis for Dish-Type and Spoke-Type Automobile Wheels (승용차용 디쉬 타입과 스포크 타입 휠에 대한 구조 해석과 피로 수명 예측)

  • Kang, Sung-Soo;Lee, Jong-Hwa
    • Transactions of the Korean Society of Mechanical Engineers A
    • /
    • v.35 no.10
    • /
    • pp.1315-1321
    • /
    • 2011
  • Prior to the experimental and production stages of goods, the strengths should be evaluated in the design stage. The introduction of commercial codes at the design stage gives benefits such as cost and time economies in the production and strength evaluation. In this study, structural analysis and fatigue analysis are carried out using ANSYS modeling of the 3D geometry of the wheel. In a comparison of dish-type and spoke-type wheels, it is shown that the deformation and maximum equivalent stress for the dish-type wheels are lower than those for spoke-type wheels. Nevertheless, spoke-type wheels are often used because they are light and have exhibit excellent cooling performance. Furthermore, according to the results of life analysis, aluminum wheels show improved resistance to fatigue compared to steel wheels.

Improvement of Durability and Reliability by Developing a Bi-axial Test Process of Road Wheel (차량 로드 휠의 복합축 평가 프로세스 구축을 통한 내구신뢰성 강건화 및 주행안정성 향상)

  • Chung, Soo Sik;Yoo, Yoen Sang;Kim, Dae Sung
    • Journal of Auto-vehicle Safety Association
    • /
    • v.8 no.1
    • /
    • pp.26-30
    • /
    • 2016
  • The steel road wheel on ventilation holes was cracked in the vehicle durability test. But the component durability test by uni-axial, CFT(Cornering Fatigue Test) and RFT(Radial Fatigue Test) had been satisfied. That is, the uni-axial component test could not forecast the crack of vehicle. Therefore this study developed the bi-axial test mode to reflect a vehicle condition(to reflect both vertical and lateral force simultaneously) based on real load data which was measured in Europe and China and developed CAE simulation too. It reproduced the cracks same as vehicle's and verified by bi-axial test machine in the LBF(Fraunhofer Institute for Structural Durability and System Reliability) durability research center in Germany. Finally this the durability CAE simulation by using HMC(Hyundai Motor Company)'s the bi-axial test mode predicts feasibly the steel wheel's durability performance before vehicle durability test.

Investigation of Friction and Wear Characteristics of Cast Iron Material Under Various Conditions (다양한 조건에 따른 주철 소재의 마찰/마모 특성에 관한 연구)

  • Joo, Ji-Hoon;Kim, Chang-Lae;Nemati, Narguess;Oh, Jeong-Taek;Kim, Dae-Eun
    • Transactions of the Korean Society of Mechanical Engineers A
    • /
    • v.39 no.8
    • /
    • pp.765-772
    • /
    • 2015
  • Cast iron is widely used in fields such as the transport and heavy industries. For parts where contact damage is expected to occur, it is necessary to understand the friction and wear characteristics of cast iron. In this study, we use cast iron plates as the specimens to investigate their friction and wear characteristics. We perform various experiments using a reciprocating type tribotester. We assess the frictional characteristics by analyzing the friction coefficient values that were obtained during the sliding tests. We observe the wear surfaces of cast iron and steel balls using a scanning electron microscope, confocal microscope, and 3d profiler. We investigate the friction and wear characteristics of cast iron by injecting sand and alumina particles having various sizes. Furthermore, we estimate the effect of temperature on the friction and wear characteristics. The results obtained are expected to aid in the understanding of the tribological characteristics of cast iron in industry.