附录附录 1英文原文Basic Machining Ｏ peration ｓ and Cu ｔ ting Tech ｎ o ｌo ｇｙBasic M ａ chini ｎ g O ｐｅ ratio ｎｓ Ｍａ chin ｅ ｔ ools ha ｖ e ｅ vo ｌ ved from ｔ h ｅ ｅ ar ｌ y f ｏ ot—powe ｒ ed lat ｈ es o ｆ t ｈ e E ｇ y ｐ ti ａ ns an ｄ Ｊ oh ｎ Wilkins ｏ n's boring ｍ ill、 The ｙ ａ re des ｉ g ｎ e ｄ to ｐ rov ｉｄ e r ｉ g ｉ d su ｐ p ｏ r ｔ for ｂ ot ｈ th ｅ work piece ａｎｄ the c ｕｔ ting t ｏｏ l and ca ｎ prec ｉ se ｌ y co ｎ t ｒ ol ｔｈ eir ｒ el ａtiv ｅ pos ｉ tion ｓ and the velocity of t ｈ e t ｏ ol wit ｈ ｒ espec ｔ to the work piec ｅ、 Bas ｉ cally, in me ｔａ l ｃ u ｔ ting， a s ｈ arpened w ｅ dge—ｓ ha ｐｅｄ tｏｏ l ｒ em ｏ v ｅ s ａ ra ｔｈ e ｒ na ｒｒ ow str ｉ p of metal ｆ rom t ｈ e su ｒ facｅ ｏ f a du ｃ til ｅ work ｐ iece in t ｈ e ｆ or ｍ of a s ｅ v ｅｒｅ ly deforme ｄ ｃ hip、 Ｔ he chip i ｓ a w ａ s ｔ e pro ｄ uct that is ｃ o ｎ sid ｅ rab ｌ y ｓｈ ort ｅr t ｈ an t ｈｅ ｗ ork ｐ iece ｆｒ om w ｈ ich it c ａ me ｂ ut wi ｔ h ａ ｃ o ｒ respoｎｄｉ ng ｉ ncrea ｓ e in thi ｃ kn ｅ ss o ｆ ｔ he uncut c ｈ ip、 The ｇｅ ome ｔrical shape of wo ｒ k ｐ i ｅ ce ｄ e ｐ e ｎｄｓ on the ｓ hape of the too ｌ ａ n ｄ its pa ｔ h du ｒｉｎｇ the mac ｈ i ｎ ing ope ｒ a ｔ ion、 Mos ｔ machi ｎ in ｇ operations prod ｕ ce pa ｒ ts of differin ｇ geometry、 If a rou ｇ h ｃ ylin ｄ ri ｃａ l wor ｋ pi ｅ ce rev ｏ l ｖ e ｓ about a central axis a ｎ d the tool pene ｔ ra ｔ es benea ｔ h i ｔｓ ｓ urface and travels ｐ arallel to the ｃｅ n ｔer of rot ａｔ ion, ａ surf ａｃ...
