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레이저 용접을 이용한 알루미늄 Fuel Filler Neck 개발
박홍석(H.S. Park),이병진(B.J. Lee),정상영(S.Y. Jeong),황현태(H.Tae Hwang),김재철(J.C. Kim),정학순(H.S. Jeong),최흥원(H.W. Choi) 한국생산제조학회 2010 한국공작기계학회 추계학술대회논문집 Vol.2010 No.-
Normally, material of filler neck is made with carbon steel, plastic and stainless so that it causes problems like weight gain and lack of durability. To being solve the problems, I suggest to develop filler neck made with aluminum which is environment-friendly recyclable material. However, according to character of aluminum, it can be caused welding faulty or thermal strain during welding. For solving these problems, aluminum fuel filler neck should be developed by the laser welding which is drawing the best designed value and high qualified welding and speeded welding. It has to consider the applicability via prototype testing. This thesis was achieved mechanism design skill and manufacture skill by performance about fuel filler neck development with laser welding. Based on this performance, it will improve auto’s light weight and recycling and cut down on expenses for the next auto. It is expected to contribute that it makes auto parts manufacturers get a competitive price, high quality, efficiency, productivity.
초생추사료의 외산어분에 대한 국산어분 우모분 및 혈분의 대체효과
박홍석 ( H S Park ),이남형 ( N H Lee ) 한국축산학회 1970 한국축산학회지 Vol.12 No.4
A simple feeding trial was carried out for 8 weeks with 270 male Hamphorn chicks to compare the effect of substitution of domestic fish meal, feather meal and blood meal for Peruvian fish meal. The proportion of foreign fish meal in control group was 12 percent of the total diet and domestic fish meal content in treatments was 4.5, 7.4 and 10.3 percent which was equivalent to 30, 50 and 70 percent of foreign fish meal protein respectively. The results obtained are as follows: 1. In feed consumption, domestic fish meal group was superior to the other groups, but there was no significant difference. 2. There was a considerable difference in total body weight gain for eight weeks. The body weight gain of chicks fed 50, 70 percent of domestic fish meal protein and feather meal group was significantly (P$lt;0.01) higher than 30 percent domestic fish meal, blood meal and control group. 3. It appeared that the feed efficiency of 50 percent domestic fish meal group and feather meal group was better than other groups (P$lt;0.05). 4. Feather meal group required the least amount of feed cost per kilogram weight gain. It was also found that the 50 percent domestic fish meal group was superior to blood meal group.