CAPP Computer Aided Process Planning Selection of machine

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CAPP Computer Aided Process Planning

CAPP Computer Aided Process Planning

• Selection of machine tools. 공작기계 선정시 영향을 주는 속성 1. 원자재 :

• Selection of machine tools. 공작기계 선정시 영향을 주는 속성 1. 원자재 : 형상, 치수, 공차 등 2. 공작기계 : 공정능력, 크기, 작업 종류, 공구 능력 등 3. 생산정보 : 생산량, 주문 빈도. 공작기계 선정 (생산비용, lead time, 품질) Xi, Xo, Xs : unit cost of input, output, scrap Yi, Yo, Ys : units of input, output, scrap Ki, Ks : technology coefficients of input and scrap f(Yi) : unit processing cost of input SC : fraction of scrap generated

기계종류 표준편차 가공비용 가공시간 준비시간 Turret Lathe Engine Lathe Auto. Screw machine 0. 007

기계종류 표준편차 가공비용 가공시간 준비시간 Turret Lathe Engine Lathe Auto. Screw machine 0. 007 0. 001 0. 0005 7. 00 10. 00 15. 00 1. 00 0. 90 0. 70 15 30 60 Sol) Turret Lathe fraction of scrap SC : 정규분포 상한 : ZU = (t. U - μ)/σ = (1. 003 – 1. 0015)/0. 007 = 0. 21 41. 683% 하한 : ZL = (t. L - μ)/σ = (0. 997 – 1. 0015)/0. 007 = 0. 64 26. 109% SC = 0. 67792 Yo = 500 Ks = SC/(1 -SC) = 0. 67792/(1 -0. 67792) = 2. 1048 Ki = 1 + Ks = 3. 1048 Ys = Ks*Yo = 2. 1048*500 = 1052. 4 Yi = Ki*Yo = 3. 1048*500 = 1552. 4 Lead time = S + t*Yi = 15 + 1. 00*1552. 4 = 1567. 4 min Xo = Ki*Xi – Ks*Xs + Ki*f(Yi)=3. 1048*10. 00 – 2. 1048*2. 00 + 3. 1048*7. 00 = 48. 572

기계종류 단위 비용 scrap Lead time Turret Lathe Engine Lathe Auto. Screw machine 48.

기계종류 단위 비용 scrap Lead time Turret Lathe Engine Lathe Auto. Screw machine 48. 57 21. 28 25. 03 1052 33 1 1567. 4 510. 06 410. 70 • Selection of tools, work-holding devices, and inspection equipment : 부품의 형상, 치수, 정밀도 등을 고려 • Determining machining conditions and manufacturing times : 저비용, 고생산성. 의사결정 변수 : 절삭속도, 이송속도, 절삭깊이 1. 최소 생산시간 기준 2. 최소 비용 기준

작업요소 시간 선행작업 A B C D E F G H I 40 30

작업요소 시간 선행작업 A B C D E F G H I 40 30 50 40 6 25 15 20 18 A A B B C C D, E F, G 작업장 후보 선택 누적시간 유휴시간 1 A A 40 20 2 B, C C 50 10 3 B, F, G E, F, G B F 30 55 30 5 4 D, E, G D G 40 55 20 5 5 E, I E H 18 24 44 42 36 16

가공 동영상 선반 http: //blog. naver. com/cbk 0347? Redirect =Log&log. No=30046531283&jumping. Vid =8229 B

가공 동영상 선반 http: //blog. naver. com/cbk 0347? Redirect =Log&log. No=30046531283&jumping. Vid =8229 B 1 F 0 C 6 B 8142 ECF 38 EF 2 E 4 AA 292 A 65410 밀링 http: //brand. pandora. tv/my. mechapia/38 245636/? cate. Code=all&list. Order=prg_id &list. Type=Thumb&P=6&search. Text= http: //www. hwacheon. co. kr/src/intro/da ta_search. php#

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