V = Cutting speed (m/min)    f = feed (mm/1날)
가공물
재질		 가공경 Straight Reamer Boring Reamer
HSS WC WC
VfVfVf
FC20
FC25
FC25DC
FCD-J		 ~3 10~120.05~0.1015~200.05~0.1030~500.2~0.5
3~10 10~120.10~0.2015~200.10~0.2030~500.2~0.5
10~20 10~120.20~0.2515~200.20~0.2530~500.5~2.0
20~30 10~120.25~0.4015~200.25~0.4030~500.5~2.0
30~50 10~120.40~0.6015~200.40~0.6030~500.5~2.0
FCV35
FCD50
FCD50A
FCD70
FCD70C
FCMP55S		 ~3 8~100.05~0.0812~160.05~0.0824~400.16~0.40
3~10 8~100.08~0.1612~160.08~0.1624~400.16~0.40
10~20 8~100.16~0.2012~160.16~0.2024~400.40~1.60
20~30 8~100.20~0.3212~160.20~0.3224~400.40~1.60
30~50 8~100.32~0.4812~160.32~0.4824~400.40~1.60
AL2B-A
AC3A
AC4B
A4B-F
ADC10		 ~3 15~200.05~0.1020~300.05~0.1050~800.30~0.60
3~10 15~200.10~0.2025~350.10~0.2050~800.30~0.60
10~20 15~200.20~0.3025~350.20~0.3050~800.30~0.60
20~30 15~200.30~0.4525~350.30~0.4550~800.30~0.60
S43C
S44C
S48C
S48CM
S53C
S53CM		 ~3 5~100.05~0.068~120.05~0.0830~400.30~0.60
3~10 8~100.06~0.158~120.08~0.1530~400.30~0.60
10~20 8~100.15~0.258~120.15~0.2530~400.30~0.60
20~30 8~100.25~0.408~120.25~0.4030~400.30~0.60
30~50 8~100.40~0.608~120.40~0.6030~400.30~0.60
SCM420H
SCM318
SCM415
SCM440H
ASM443H
ASCM17H1		 ~3 5~100.05~0.088~120.05~0.0830~400.30~0.60
3~10 5~100.08~0.158~120.08~0.1530~400.30~0.60
10~20 5~100.15~0.258~120.15~0.2530~400.30~0.60
20~30 5~100.25~0.408~120.25~0.4030~400.30~0.60
30~50 5~100.40~0.608~120.40~0.6030~400.30~0.60
가공여유
가공경 가공여유 날수
~5 0.1~0.2mm ø5 ~ ø14mm : 6날
ø14 ~ ø25mm : 6 ~ 8날
5~10 0.2~0.4mm
10~20 0.2~0.4mm
40~ 0.3~0.6mm
BORING REAMER : GIANT(일본)사 고정도, 고FEED, 고절삭용

Reaming 절삭동력 계산

  • Work material : S43C (HB201-285)
  • Type of reamer : Boring reamer
  • $D$ (mm) : Cutting diameter (= 32)
  • $Z$ (EA) : Count of tip (= 4)
  • $L$ (mm) : Cutting length (= 40)
  • $d$ (mm) : Clearance (= 0.3)
  • $V$ (m/min) : Cutting speed (= 35)
  • $f$ (mm/rev) : Feed rate (= 0.4)
R.P.M (rev/min)
$$RPM = \frac{V \times 1000}{\pi \times D} = \frac{35 \times 1000}{\pi \times 32} = 348.151$$
Feed rate $F_1$ (mm/min)
$$F_1 = f \times RPM = 0.4 \times 348.151 = 139.261$$
Cutting Time $T$ (sec)
$$T = \frac{(L + 3.0) \times 60}{F_1} = \frac{(40 + 3.0) \times 60}{139.261} = 18.526$$
Chip량 (Rate of metal removal) $Q$ ($\text{cm}^3\text{/min}$)
$$Q = d \times f \times V = 0.3 \times 0.4 \times 35 = 4.2$$
재질에 따른 절삭계수 ($K_s$)

TURNING의 $K_s$값을 적용합니다.   $K_s = 308$

$$f_z = \frac{f}{Z} = \frac{0.4}{4.0} = 0.1$$
순수절삭동력 $N_o$ (Kw)
$$N_o = \frac{d \times f \times V \times K_s}{60 \times 102} = \frac{0.3 \times 0.4 \times 35 \times 308}{60 \times 102} = 0.211$$
절삭 토크 $M_d$ ($\text{N}\cdot\text{m}$)
$$M_d = \frac{9550 \times N_o}{RPM} = \frac{9550 \times 0.211}{348.151} = 5.797$$
Motor의 선정 = 1.5 kW

계산된 순수절삭동력 $N_o = 0.211\text{ kW}$를 기준으로 한 단계 높은 사양을 채택합니다.

No
(kW)		초과-0.81.32.64.15.99.213.116.519.1
이하0.81.32.64.15.99.213.116.519.126.0
효율(η)1.881.71.41.341.271.21.151.151.151.15
사용 Motor1.52.23.75.57.511.015.019.022.030.0