한국산업보건학회지 (Journal of Korean Society of Occupational and Environmental Hygiene)
- 제5권2호
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- Pages.147-159
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- 1995
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- 2384-132X(pISSN)
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- 2289-0564(eISSN)
자동차 조립라인에서 이중-헴머형(Double-hammer type) 임펙트 렌치와 오일-펄스형(Oil-pulse type)임펙트 렌치 에어공구의 국소진동가속도 및 소음수준
Hand-Arm Vibration and Noise Levels of Double-Hammer Type and Oil-Pulse Type Impact Wrenches in Automobile Assembly Lines
- Jeung, Jae-Yeal (Institute of Industrial Medicine, College of Medicine, Dong-A University) ;
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Kim, Jung-Man
(Institute of Industrial Medicine, College of Medicine, Dong-A University)
- 발행 : 1995.11.10
초록
This study was conducted to introduce fundamental data of hand-arm vibration and noise exposure levels with impact wrenches(double-hammer impact wrenches and oil-pulse impact wrenches) used in automobile assembly lines considering the process variables and tool variables. In studing, products per day, required time screwing the bolts or nuts per bolts or nut were considered as process variables, and capacity of bolts or nuts, air consumptions per minute, tool weights, RPM were considered as tool variables. Hand-arm vibration levels of 3 axis in each hand were measured using the instruments compling with ISO/DIS 5349 and noise levels were measured using a noise logging dosimeter. The results were as follows : 1. Required time to screwing the bolt or nut by oil-pulse impact wrenches is shorter than double-hammer impact wrenches but total daily exposure time of oil-pulse impact wrenches was higher than double-hammer impact wrenches because the number of bolts or nuts per cycle was many. 2. Oil-pulse impact wrenches have been used to screwing the large bolt or nut in comparing with double-hammer impact wrenches and required time to screwing the bolts or nuts were shorter than double-hammer impact wrenches because oil-pulse impact wrenches were using high RPM and large air consumption per minute. Noise level of oil-pulse impact wrenches was 8 dB(A) lower than double-hammer impact wrenches. 3. Dominant hand-arm vibration levels of double-hammer impact wrenches in each hand were
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