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제목	Dandrea Boring Technical Data

분류	설계데이타 > 설계규격데이타	작성일	2008.01.22

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Dandrea Boring Technical Data

Technical Data	Suggested Cutting Conditions for Roughing Operations
	With Double-Bit Boring Bars

Material	Boringbar Dimensions	Working Conditions	Cutting Speed Vc= m/min.			Feed f= mm/rev (Twin Cutters)
			Diameter			Insert Radius
			D<38	D=38~120	D>120	R=0.2	R=0.4	R=0.8
Carbon Steel HB ≤ 200	L /d = 2.5	Good	120-180	140-200	160-250	-	0.2 - 0.4	0.3 - 0.5
	L /d = 4	Nomal	100-160	120-180	140-200	-	0.2 - 0.4	0.3 - 0.5
	L /d = 6.3	Difficult	70-100	70-100	70-100	0.15 - 0.3	0.2 - 0.4	-
Carbon Steel HB > 200	L /d = 2.5	Good	100-160	120-180	140-200	-	0.2 - 0.4	0.3 - 0.5
	L /d = 4	Nomal	80-140	100-160	120-180	-	0.2 - 0.4	0.3 - 0.5
	L /d = 6.3	Difficult	60-90	70-100	70-100	0.15 - 0.3	0.2 - 0.4	-
Stainless Steel AISI 304 - 316	L /d = 2.5	Good	80-110	90-120	100-140	-	0.2 - 0.4	0.3 - 0.5
	L /d = 4	Nomal	70-100	80-110	90-120	-	0.2 - 0.4	0.3 - 0.5
	L /d = 6.3	Difficult	60-90	60-90	60-90	0.15 - 0.3	0.2 - 0.4	-
Cast iron	L /d = 2.5	Good	90-120	100-140	120-160	-	0.2 - 0.4	0.3 - 0.5
	L /d = 4	Nomal	70-100	90-120	100-140	-	0.2 - 0.4	0.3 - 0.5
	L /d = 6.3	Difficult	60-90	60-90	60-90	0.15 - 0.3	0.2 - 0.4	-
Aluminum	L /d = 2.5	Good	160-250	200-300	250-350	-	0.3 - 0.5	0.4 - 0.6
	L /d = 4	Nomal	140-200	160-250	200-300	-	0.3 - 0.5	0.4 - 0.6
	L /d = 6.3	Difficult	100-150	100-150	100-150	0.2 - 0.4	0.3 - 0.5	-

Twin cutters at the same cutting diameter

Cutting Depth ap = mm	Working Range Ø = mm	Max. Cutting Depth
Cutting Depth ap = mm	Working Range Ø = mm	Steel	Cast iron, Aluminium
	18-28	1.5-2	2-2.5
	28-50	2-3	2.5-3.5
	50-68	3-4	3.5-5
	68-200	4-5	5-7
	200-500	5-6	6-8

Twin cutters at different cutting diameters

※ATTENTION: For boring operations at different diameters, reduce to a half the feed indicated on the above table.

Technical Data	Suggested Cutting Conditions for Boring Operations
	With Testarossa And Micrometric Boring Bars

Material	Boringbar Dimensions	Working Conditions	Cutting Speed Vc= m/min.	Feed f= mm/rev			Insert Quality	Cutting Depth
				Insert Radius
				R=0.0	R=0.2	R=0.4
Carbon Steel HB ≤ 200	L /d = 2.5	Good	200-300	-	0.05 - 0.08	0.07 - 0.1	DC100	0.1-0.25 mm
	L /d = 4	Nomal	160-250	-	0.05 - 0.08	0.07 - 0.1	DC100
	L /d = 6.3	Difficult	70-100	0.05 - 0.08	0.05 - 0.08	-	DP300
Carbon Steel HB > 200	L /d = 2.5	Good	160-250	-	0.05 - 0.08	0.07 - 0.1	DC100
	L /d = 4	Nomal	150-200	-	0.05 - 0.08	0.07 - 0.1	DC100
	L /d = 6.3	Difficult	70-100	0.05 - 0.08	0.05 - 0.08	-	DC010
Stainless Steel AISI 304 - 316	L /d = 2.5	Good	120-160	-	0.05 - 0.08	0.07 - 0.1	DP300
	L /d = 4	Nomal	100-140	-	0.05 - 0.08	0.07 - 0.1	DP300
	L /d = 6.3	Difficult	70-100	0.05 - 0.08	0.05 - 0.08	-	DP300
Cast iron	L /d = 2.5	Good	120-160	-	0.05 - 0.08	0.07 - 0.1	DC100
	L /d = 4	Nomal	100-140	-	0.05 - 0.08	0.07 - 0.1	DC100
	L /d = 6.3	Difficult	70-100	0.05 - 0.08	0.05 - 0.08	-	DK100
Aluminum	L /d = 2.5	Good	300-400	-	0.05 - 0.08	0.07 - 0.1	DK100
	L /d = 4	Nomal	250-350	-	0.05 - 0.08	0.07 - 0.1	DK100
	L /d = 6.3	Difficult	100-150	0.05 - 0.08	0.05 - 0.08	-	DK100
steel HCR > 50	L /d = 2.5	Good	80-100	-	0.04-0.06	0.05-0.07	D20CBN
steel HCR > 50	L /d = 4	Nomal	80-100	-	0.04-0.06	0.05-0.07	D20CBN

CALCULATION FORMULAS FOR BORING
Vc	cutting speed	(m/min.)	Vc = π X D X n/1000 n = Vc X 1000 / π X D Vf = n X f
D	diameter of workpiece	(mm)
n	spindle revolution	(mm/rev)
Vf	feed rate	(mm/min.)
f	feed	(mm/rev)
π	3.14	-

자료출처 : DAEKYUNG MACHINERY CO.,LTD
Dandrea-Technical

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