http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Titanium의 切削에서 Saw-toothed Chip의 切削 Energy에 관한 硏究
吳錫炯,徐南燮 全北大學校 1987 論文集 Vol.29 No.-
In metal cutting, various types of chips are produced. W. Rosenhain classified them into flow-type, shear-type, pluck-off-type and tear-type. In the experiment, Nakayama found the chips whose shapes were saw-toothed-like and which were produced periodically. Since then this type of chip has been called saw-toothed chip. When this chips occur, the cut surface is smooth and the required cutting force is small. Nakayama and Ueda insist that saw-toothed chip is formed by the brittle fracture, the vibration, and etc. They studied about the effect of cutting depth, true rake angle on the slip and pitch. But there has not been report on the cutting energy with saw-toothed chip. This report shows how the depth of cut, true rake angle, and cutting speed effect on the cutting energy in machining titanium. The results are as foolows: 1. The specific cutting force decreases with the increase of the pitch. 2. The normal stress and the shear stress on the shear plane decrease with the increase of cutting depth. They are almost independent on the variation of true rake angle. 3. The unit friction energy on the tool face and the unit shear energy on the shear plane decrease with the increase of true rake angle and cutting depth. 4. The saw-toothed chip is formed in the case that the depth of cut is deeper than 0.03mm, and the smaller the true rake angle is, the larger the range, where saw-toothed chip is formed, is.
徐南燮,金種澤 전북대학교 공업기술연구소 1983 工學硏究 Vol.13 No.-
The objects of the study are to oberve the effects of cutting parameters on the cutting force, establish the experimental equation and compare the experimental equation with theoretical one. Merchant and Lee showed their research results theoretically and experimentally on the milling with one tooth cutter. A Quartz multi-component dynamometer (made in Swiss) with a charge amplifier was used to examine the necessary cutting force. The high speed steel plain cutter was and work material was SS41. Results are following: 1) The cutting force was proportional to the feed. depth of cut and velocity exponentially, and the following equation was developed: F_R = 101 f^0.54d^0.73v^-0.93 2) It is supposed that the experimental value was smaller than the theoretical one owing to the size effect and impact. 3) The cutting force ratio(F_y/F_x)was proportional to the cutting speed and inversely p개portional to the speed.