등속조인트 축력 정밀 측정 시험기법 개발

이득원(Deuk-Won Lee),이철희(Chul-Hee Lee),윤혁채(Hyuk-Chae Yun),조원오(Won-Oh Cho),김교헌(Gyo-Heon Kim),박정률(Jeong-Ryul Park) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11

Generated axial force (GAF) due to internal friction of driveshaft joint is one of the causes generating the shudder of vehicle. It also causes vibration problem on steering wheels of vehicles during idling. In this study, automated test machine is developed to precisely measure the GAF caused by internal friction in constant velocity joints. As the developed machine can control the temperature of joint, loading torque, angle of rotation and joint angles, actual vehicle driving condition can be applied. In order to validate the developed constant velocity joint tester, GAF is compared by using different types of grease in tripod joints. Also GAF is measured for both on new and used constant velocity joints to be compared and analyzed. The test result shows the repeatability and consistency of the test machine in terms of the different test conditions. By using the constant velocity joint tester, friction performance of the joint can be evaluated by proposing the best constant velocity joints as well as greases generating lowest GAF.

CVJ 절각력 저감을 위한 설계인자 민감도 분석 및 최적화 연구

김기헌(Kihun Kim),문수영(Sooyoung Moon),이재원(Jaewon Lee) 한국자동차공학회 2019 한국자동차공학회 학술대회 및 전시회 Vol.2019 No.11

Due to the high performance of the constant velocity joint, various problems may arise in terms of the function and strength of the constant velocity joint. Due to the miniaturization, strength degradation may occur. High keratosis of the joints can lead to problems of functional problem strength degradation. In this study, we discuss the articulation (functional) problems of constant velocity joints that can be caused by high keratinization. We have applied a design concept called angle offset to implement a high-angle joint. The angle offset can compensate for the strength by ensuring sufficient groove depth even under high angled conditions. However, there is a disadvantage in that machining is difficult and it is not easy to match the exact dimensions. As a result, a high friction force between the initial ball and the groove is generated, thereby causing a high bending resistance. High friction forces reduce the efficiency of the joint and can be a source of durability problems. In this study, the design factors affecting the bending resistance are derived and the sensitivity is analyzed to derive the factors that can minimize the bending resistance. The optimization technique uses DOE and the strength analysis will also confirm the strength robustness of the model.

Tripod Constant Velocity Joint(TJ)의 축력에 관한 다물체 동역학 해석

배병철(Byoungchul Bae),박정률(Jeonglyul Park) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-

등속조인트 기술과 현대위아(주)의 글로벌 시장현황 및 전략

배일현(Bae, Il-Hyun),김기찬(Kim, Ki-Chan) 韓國商品學會 2011 商品學硏究 Vol.29 No.6

현대위아(주)는 등속조인트시장에서 국내 최고의 기술과 최대 생산능력을 보유한 기업이다. 또한, 세계시장에서도 선두권에 위치하고 있는 글로벌기업이다. 자동차 시장과 기업 환경의 변화로 그 수요와 기술적 요구가 한층 높아진 등속조인트는 영국, 미국, 일본 같은 선진 기술국의 높은 기술적 장벽 때문에 접근하기 쉽지 않은 특성을 가지고 있다. 그러나 현대위아(주)는 뛰어난 공작기계 생산 능력과 품질을 중시하는 기업문화에 바탕을 둔 기술혁신 노력을 꾸준히 해왔다. 그러한 결과로 등속조인트시장을 선도하는 기술을 보유하게 되었는데, 본 연구에서는 등속조인트의 기술현황과 더불어 현대위아(주)의 성장잠재력을 등속조인트를 중심으로 살펴보고자 한다. Hyundai Wia Corporation was founded in 1976, and it was a member of the Hyundai Motor Group in 2001. Up to now, Hyundai Wia Corporation is the one of the most biggest automotive parts manufacturer in Korea and produces automotive parts, other machines, airplane parts with accumulated technology, weapons, and various advanced products of satellite image. Since 2000, the company attains the biggest market share in Korea. Especially, as a No 1 Constant Velocity Joint manufacturer, leading the market in the world. The company achieved 4.2 billion US dollars in 2010. Hyundai has a VISION that becoming a advanced top 20 domestic company in Korea by the year 2020. So, Hyundai Wia Corppration endeavor to discovering new business areas that will push their sales engines into the next step.

Cross Groove형 등속조인트의 섭동 저항(PR)에 관한 다물체 동역학 해석

유창범(Changbeom Yu) 한국자동차공학회 2013 한국자동차공학회 학술대회 및 전시회 Vol.2013 No.11

Constant velocity joints in automobiles have been used as important parts that transmit torque from a transmission to wheel. They are classified as plunge type and fixed type joints. The plunge type joints have two important phenomena called the GAF(Generated Axial Force) and the PR(Plunging Resistance) derived from axial force to cause NVH(Noise Vibration Harshness) problems of an automobile. Especially the PR is known as the basic cause of an idle booming phenomenon which generates automobile body vibrations and noise in a stopped automatic transmission vehicle with “D”(Drive) mode, which make worse the riding comfort of an automobile. Therefore many manufacturers producing constant velocity joints have researched the way to reduce the PR of their products. In this paper, the dynamic model including the kinematic, contact and friction model is used to simulate the PR of Cross Groove Joint(CGJ). The multi-body dynamic analysis of CGJ is conducted by using MSC.ADAMS. Consequently the developed dynamic model of CGJ is able to predict properly the PR and will be used to study design parameters.

볼 타입 등속조인트 케이지 강도의 역학적 영향인자 분석

송명의(Myeong-eui Song),임영훈(Young-hun Lim),안성백(Sung-beak An),이인상(In-sang Lee),김정윤(Jung-yun Kim) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11

Constant velocity joint is used for transmitting torque to wheel. Ball joint is popular to outboard type because it allows wheel to bend freely according to steering. Nowadays, the strength requirements of CVJ are being more complicated because of robustness against high engine power and the demand for flexible turning capability in small area. One of the CVJ strength evaluations is quasi-static torsion limitation test, which measures the fracture torque with maximum joint angle on ball joint. Cage web of ball joint determines most fracture strength of CVJ on the test. The study is performed in order to find the reason of cage web weakness with coupled dynamic analysis method. The study shows that firstly, contact force between ball and inner race track at large joint angle makes it between inner race and cage web amplified especially in from 120 to 150 revolution range. Secondly, the kinetic result of cage web’ contact posture for maximum joint angle shows that the phase from 145 to 215 has weak shear strength potential by contact pressure. Finally, the change of track which has bisymmetry shape joint along to shaft direction from joint center shows that the stress of web can be minimized and the strength is very sensitive to track shape

Tripod형 등속조인트의 축력에 미치는 설계변수 영향 분석

유창범(Changbeom Yu),오병기(Byungki Oh),박정률(Jeonglyul Park) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11

Low vibration constant velocity joint has been developed for improvement of riding comfort. “Low vibration” means to reduce GAF(Generated Axial Force) at constant velocity joint. There are many problems for developing constant velocity joint to reduce GAF through tests of physical model. In this paper, dynamic analyses of tripod constant velocity joint using virtual model were performed by changing value of design variables which have possibility of affecting GAF. And GAF effect and interaction of design variables were studied by developed calculation method of GAF performance index. From the result of dynamic analyses suitable value and range of the design variables were suggested to reduce GAF.

자동차 등속 조인트 샤프트 길이에 따른 내구성 해석을 통한 융합연구

최계광,조재웅 한국융합학회 2018 한국융합학회논문지 Vol.9 No.8

자동차의 구동방식은 전륜구동, 후륜구동, 4륜구동의 방식이 있다. 구동방식에서 운전자가 원하는 방향으로 전환하는 것과 바퀴에 동력을 전달하여 구동하는 두 가지의 역할을 수행하는데 있어 가장 중요한 부품이 등속 조인트이다. 도로상에서 주행 시에는 노면의 상태에 따라서 동력을 전달하는 부품들에 충격이 가해질 수 있다. 본 연구에서는 각각 샤프트의 길이가 다른 3개의 등속 조인트 각 모델들은 CATIA로 모델링하였고 ANSYS를 이용하여 구조 및 피로해석을 수행하였다. 본 연구 결과로는 Model 2가 다른 모델 대비 뛰어난 내구성을 가짐을 알 수 있었다. 이러한 결과를 이용하여 충격에 대한 내구성을 가지는 등속 조인트 설계를 할 때에 유용한 자료가 될 것이라고 사료되며, 등속 조인트의 디자인을 융합기술에 접목하여 미적 감각을 나타낼 수 있다. The driving methods of car are front wheel drive, rear wheel drive and four wheel drive. At driving methods, constant velocity joint is the most important part at carrying out two functions for converting to the direction which the driver wants and transferring the power to wheels. At driving on the road, the impact can be applied to the parts transmitting power according to the state of road surface. In this study, each models of three constant velocity joints whose shaft length are different respectively were modelled with CATIA and the structural and fatigue analyses were carried out by using ANSYS. This study result is thought to be the useful material at designing the constant velocity joint with the durability against impact. And it is possible to be grafted onto the convergence technique at the design of constant velocity joint and show the esthetic sense.

Tirpod Constant Velocity Joint(TJ)의 PR에 관한 다물체 동역학 해석

유창범(Changbum Yu),배병철(Byoungchul Bae),박정률(Jeonglyul Park) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11

Constant velocity joints in automobiles have been used as important parts that transmit touque from a transmission to wheel. They are classified as plunge type and fixed type joints. The plunge type joints have two important phenomena called the GAF(Generated Axial Force) and the PR(Plunging Resistence) to cause NVH(Noise Vribration Harshness) problems of an automobile. Especially the PR is known as the basic cause of an idle booming phenomenon which generates automobile body vibrations and noise in a stopped automatic transmission vehicle with “D”(Drive) mode, which make worse the riding comfort of an automobile. Therefore many manufacturers producing constant velocity joints have researched the way to reduce the PR of their products. In this paper, the dynmaic model of TJ (the typical plunge type joint) including the kinematic, contact and friction model is used to simulate the PR. The multi-body dynamic analysis of TJ is conducted by using MSC.ADAMS and the result of the analysis is compared with the experimental results to verify the dynamic model of TJ. Cosequently the developed dynamic model of TJ is able to predict properly the PR and used to study design parameters.

플런징 타입 등속조인트의 축력 예측 모델링 및 주요 인자 분석

김동완(D. W. Kim),주종남(C. N. Chu),송준(Jun Song),조광희(G. H. Jo),이인상(I. S. Lee),신기범(K. B. Shin) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11

In this research, GAF(Generated Axial Force) estimation model of plunging type constant velocity joint(CVJ) was derived and that was verified by GAF measurement system. Using the verified GAF estimation model, sensitivity of CVJ design parameters were analyzed. The purposes of this research are making highly accurate GAF estimation model including the detailed friction characteristics at contact point and improving vehicle shudder problem, which is caused by GAF, through this estimation model.