Product handbook - Grooving and groove-turning
Transcription
Product handbook - Grooving and groove-turning
Product handbook Grooving and groove-turning _Walter Cut Grooving and groove-turning experts CONTENTS Grooving and groove-turning Walter Cut grooving/groove-turning range 2 Tiger·tec® grades 4 Walter Cut tools Walter Cut tools for grooving and groove-turning 8 System overview 10 Toolholders 20 Toolholders for snap-ring grooves Inserts 13 GX inserts for grooving 14 GX inserts for groove-turning 21 Inserts for snap-ring grooves Technical information 22 24 26 29 34 35 36 37 Grade application chart Cutting data User guide Grooving fault analysis Groove-turning fault analysis Wear analysis Hardness comparison table Calculation Formulas Walter Cut: Tiger·tec® grades for grooving and groove-turning Completely innovative coatings and geometries achieve peak performance when grooving and parting off. With this innovative development, it is possible for the first time to apply an aluminum oxide coating in a PVD process to carbide indexable inserts. Tiger·tec® for Walter Cut This PVD Tiger offers a previously unknown degree of toughness and wear resistance – which is particularly important in grooving operations. In addition to this patented PVD Tiger·tec® coating and the proven CVD Tiger·tec® coating, there is a complete Tiger·tec® grade package available for the Walter Cut grooving system. 2 The application The INSERT GRADES –– For grooving, groove-turning and parting off –– From unfavorable to stable conditions –– The Walter Tiger·tec® grades cover the complete range of grooving WSP 43 – Tiger·tec® PVD Al2O3 –– Maximum toughness and process reliability for difficult to machine materials, steel and stainless steel –– The cutting material for unfavorable conditions, e.g. heavily interrupted cuts, very unstable clamping, unstable machines and low cutting speeds Your advantages –– High productivity due to a reliable machining process –– High temperature resistance in conjunction with high toughness –– High cutting edge stability due to low coating temperature and at the same time offering high wear resistance –– Smooth surface to reduce built-up cutting edges Wear resistance WSM 33 – Tiger·tec® PVD Al2O3 –– Maximum resistance to wear and temperature for difficult to machine materials, steel and stainless steel –– The universal cutting material covers the majority of all applications WPP 23 – Tiger·tec® CVD –– Maximum hot hardness and wear resistance for steel –– For use in stable conditions in conjunction with high cutting speeds WAK 20 – Tiger·tec® CVD –– The benchmark cutting tool material in cast iron machining –– The universal grade for the majority of applications WSM / WSP PVD Al203 Current PVD grades Toughness Walter Cut – Grooving and groove-turning 3 Walter Cut G1011: One for all Reduced tool head height Optimal screw position Locking screw can be accessed from above and below New insert seat design Walter Cut monoblock toolholder G1011: The tool The application –– Walter Cut monoblock tools for grooving, groove-turning and parting off –– Locking screw can be accessed from above and below –– Reduced head height – eases chip evacuation –– For 2-cutting edge GX24 grooving insert –– Insert widths 0.118, 0.157, 0.197, 0.236 inch –– Cutting depths 0.472, 0.827 inch –– Shank sizes 0.750 x 0.750 inch, 1.000 x 1.000 inch –– First choice for all OD grooving operations –– Parting off of diameters up to 1.654 in –– Grooving and groove-turning operations up to a depth of 0.827 in –– For use on lathes of all types 4 The benefits to you at a glance 0.472 in Simple handling in inverted use 0.827 in Optimum stability due to two cutting depths f h Simple chip evacuation due to reduced tool head height [h] Greatest clamping force due to optimum screw position. Driver grooving operations 4140 Tool: Insert: Insert grade: Machine: Cutting data vc 750 SFM f 0.010 – 0.012 inch s 0.236 inch T 0.315 inch Number of cuts: 4 G1011.2020R-6T12GX24 GX24-4E600 N050-UF4 WPP 23 Index MS32 multi-spindle, 5 hp Comparison of number of components +160% Competition Walter 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000 Walter Cut – Grooving and groove-turning [pieces] 5 Walter Cut Modular: The quick-change artist Highest stability due to optimum interface Flexibility due to different tool shanks Support face for absorbing cutting forces Walter Cut Modular tool NCBE The tool The application –– Modular tooling system for grooving, groove-turning and parting off –– For insert widths of 0.024–0.382 inch –– Over 800 variants possible –– Greatest stability –– Three different grooving systems can be used in the same base holder –– Tools for internal and external machining –– –– –– –– 6 For radial and axial grooving For internal and external grooving For machining snap-ring grooves For use on lathes of all types The benefits to you at a glance Square shank and Walter Capto™ tools available GX FX LX GX axial The best grooving system for every machining operation Pre-groove clamping nut 4140 Tool: Insert: Insert grade: Machine: Cutting data vc 425 SFM f 0.006 – 0.002 inch s 0.118 inch T 0.197 inch Number of cuts: 2 NCAE 25–C400 R–GX16–2 GX16–2E300 N030–GD3 WPP 23 Index MS32 multi-spindle, 5 hp Comparison of number of components +40% Competition Walter 100 200 300 400 500 600 700 800 Walter Cut – Grooving and groove-turning [pieces] 7 System overview Walter Cut grooving and groove-turning tools Grooving / groove-turning E HOIC 1st C G 1011 Shank size Page 10 s 0.625 x 0.625 1.000 x 1.000 1.250 x 1.000 Page 12 s Tmax 0.077–0.098 0.276 0.118–0.178 0.276 0.077–0.098 0.276 0.118–0.178 0.276 0.118 0.472/0.827 0.079–0.098 0.472 0.156 0.472/0.827 0.118–0.178 0.472 0.197 0.472/0.827 0.157–0.197 0.472 0.236 0.472/0.827 0.118 0.472/0.827 0.079–0.098 0.472/0.827 0.156 0.472/0.827 0.118–0.178 0.472/0.827 0.197 0.472/0.827 0.157–0.197 0.472/0.827 0.236 0.472/0.827 s Tmax 0.118–0.178 0.472/0.827 0.118-0.138 0.827 0.157–0.197 0.472/0.827 0.157-0.197 0.827 0.236 s = cutting width Tmax = max. grooving depth 8 XLCFN Page 11 Tmax 0.500 x 0.500 0.750 x 0.750 NCAE / NCBE 0.472/0.827 0.236 0.827 Snap-ring grooves E HOIC 1st C NCCE NCAE Page 20 Page 11 s Tmax s Tmax 0.024–0.067 0.079 0.077–0.098 0.276 0.118–0.178 0.276 0.024–0.067 0.079 0.077–0.098 0.276 0.118–0.178 0.276 0.079–0.098 0.472 0.118–0.178 0.472 0.157–0.197 0.472 0.079–0.098 0.472 0.118–0.178 0.472 0.157–0.197 0.472 0.118–0.178 0.472 0.024–0.089 0.024–0.089 0.024–0.089 0.118 0.118 0.118 0.157–0.197 0.472 0.236 0.472 Walter Cut – Grooving and groove-turning 9 Walter Cut Tools for grooving and groove-turning G1011 s in 0.118 0.156 0.197 0.236 Tmax in h = h1 in b in 0.472 0.750 0.750 G1011.12 R/L–3T12GX24 0.472 1.000 1.000 G1011.16 R/L–3T12GX24 0.827 0.750 0.750 G1011.12 R/L–3T21GX24 0.827 1.000 1.000 G1011.16 R/L–3T21GX24 0.472 0.750 0.750 G1011.12 R/L–4T12GX24 0.472 1.000 1.000 G1011.16 R/L–4T12GX24 0.827 0.750 0.750 G1011.12 R/L–4T21GX24 0.827 1.000 1.000 G1011.16 R/L–4T21GX24 0.472 0.750 0.750 G1011.12 R/L–5T12GX24 0.472 1.000 1.000 G1011.16 R/L–5T12GX24 0.827 0.750 0.750 G1011.12 R/L–5T21GX24 G1011.16 R/L–5T21GX24 0.827 1.000 1.000 0.472 0.750 0.750 G1011.12 R/L–6T12GX24 0.472 1.000 1.000 G1011.16 R/L–6T12GX24 0.827 0.750 0.750 G1011.12 R/L–6T21GX24 0.827 1.000 1.000 G1011.16 R/L–6T21GX24 For inserts see page 13/14. 10 Designation Type GX 24–2E3 . . GX 24–3E4 . . GX 24–3E5 . . GX 24–4E6 . . NCAE s in 0.077–0.098 0.118–0.178 0.079–0.098 0.118–0.178 0.157–0.197 0.236 0.118 0.157–0.197 0.236 0.315 Tmax in h = h1 in b in 0.276 0.500 0.500 NCAE 12–0808 R/L–GX 09–1 0.276 0.625 0.625 NCAE 16–1010 R/L–GX 09–1 0.276 0.500 0.500 NCAE 12–0808 R/L–GX 09–2 0.276 0.625 0.625 NCAE 16–1010 R/L–GX 09–2 0.472 0.750 0.750 NCAE 20–1212 R/L–GX 16–1 Designation 0.472 1.000 1.000 NCAE 25–1616 R/L–GX 16–1 0.472 0.750 0.750 NCAE 20–1212 R/L–GX 16–2 0.472 1.000 1.000 NCAE 25–1616 R/L–GX 16–2 0.472 1.250 1.250 NCAE 32–8585 R/L–GX 16–2 0.472 0.750 0.750 NCAE 20–1212 R/L–GX 16–3 0.472 1.000 1.000 NCAE 25–1616 R/L–GX 16–3 0.472 1.250 1.250 NCAE 32–8585 R/L–GX 16–3 0.472 1.000 1.000 NCAE 25–1616 R/L–GX 16–4 0.472 1.250 1.250 NCAE 32–8585 R/L–GX 16–4 0.827 0.750 0.750 NCBE 20–1212 R/L–GX 24–2–21 0.827 1.000 1.000 NCBE 25–1616 R/L–GX 24–2–21 0.827 1.000 1.000 NCBE 25–1616 R/L–GX 24–3–21 0.827 1.250 1.000 NCBE 32–8585 R/L–GX 24–3–21 0.827 1.000 1.000 NCBE 25–1616 R/L–GX 24–4–21 0.827 1.250 1.000 NCBE 32–8585 R/L–GX 24–4–21 0.827 1.000 1.000 NCBE 25–1616 R/L–GX 24–5–21 Type GX 09–1 … GX 09–2 … GX 16–1 … GX 16–2 … GX 16–3 … GX 16–4 … GX 24–2 … GX 24–3 … GX 24–4 … GX 24–5 … For inserts see page 13/14 (snap-ring grooves p. 21). These tools are also available in Walter Capto™ version. See the Walter general catalog. Walter Cut – Grooving and groove-turning 11 Walter Cut Tools for grooving and groove-turning XLCFN s h4 h3 s mm Tmax mm h3 =h4 mm Designation 0.118–0.138 0.827 1.260 XLCFN 3203–gx24–2S 0.157–0.197 0.827 1.260 XLCFN 3204–gx24–3S GX 24–3 . . . 0.236 0.827 1.260 XLCFN 3206–gx24–4S GX 24–4 . . . For inserts see page 13/14. 12 Type GX 24–2 . . . GX inserts for grooving Geometry selection Cutting edge Sharp Stable ISO P Steel ICE HO 1st C UF4 (see p. 15) CE4 GD3 (see p. 18) (see p. 19) Feed Low Stable Cutting edge Sharp ISO M Stainless steel High UD6 ICE HO 1st C (see p. 17) GD3 UF4 (see p. 19) (see p. 15) Feed Low Cutting edge E HOIC 1st C UA4 Stable Sharp ISO K Cast iron High (see p. 16) UF4 CE4 (see p. 18) (see p. 15) Feed Low Walter Cut – Grooving and groove-turning High 13 GX inserts for groove-turning Geometry selection Cutting edge Sharp Stable ISO P Steel ICE HO 1st C UF4 (see p. 15) UD6 (see p. 17) Feed Low Stable Cutting edge UD6 ICE HO 1st C Sharp ISO M Stainless steel High (see p. 17) UF4 (see p. 15) Feed Low Cutting edge Sharp Stable ISO K Cast iron ICE HO 1st C UA4 UF4 (see p. 16) (see p. 15) Feed Low 14 High High UF4 - the universal one The right cutting edge for –– All grooving operations –– Good chip control –– medium feed rates –– Low cutting forces 32° 11° Optimum indexable insert for: Cutting edge design 6° good moderate poor machining conditions GX–UF4 coated grades 0.008 0.098 0.098 0.008 0.098 GX16–2E300 N030–UF4 0.630 0.118 0.012 0.118 GX16–3E400 N040–UF4 0.630 0.157 0.016 0.138 GX16–3E500 N040–UF4 0.630 0.197 0.016 0.138 GX16–4E600 N050–UF4 0.630 0.236 0.020 0.157 GX24–2E300 N030–UF4 0.945 0.118 0.012 0.098 GX24–3E400 N040–UF4 0.945 0.157 0.016 0.118 GX24–3E500 N040–UF4 0.945 0.197 0.016 0.118 GX24–4E600 N050–UF4 0.945 0.236 0.020 0.138 WSP 43 0.079 0.630 WSM 33 0.630 GX16–1E250 N020–UF4 WPP 23 GX16–1E200 N020–UF4 WSP 43 ap max in WSM 33 r in S WSP 43 s in K WSM 33 ap max l in Designation M WPP 23 P a a a a a a a a a a b b b b b b b b b b c c c c c c c c c c a a a a a a a a a a c c c c c c c c c c b b b b b b b b b b b b b b b b b b b b c c c c c c c c c c l = overall length For cutting speed recommendations see page 24. Insert width 0.236 0.197 0.157 0.118 0.098 0.079 0.002 0.004 0.006 0.008 0.010 0.012 0.014 0.016 0.018 Walter Cut – Grooving and groove-turning Feed 15 UA4 – the stable one The right cutting edge for –– Cast iron machining –– Middle to high machining parameters –– Greatest process reliability in cast iron machining 0° Optimum indexable insert for: Cutting edge design 6° good moderate poor machining conditions GX–UA4 coated grades 0.630 0.079 0.008 0.098 GX16–1E250 N020–UA4 0.630 0.098 0.008 0.098 GX16–2E300 N030–UA4 0.630 0.118 0.012 0.118 GX16–3E400 N040–UA4 0.630 0.157 0.016 0.138 GX16–3E500 N040–UA4 0.630 0.197 0.016 0.138 GX16–4E600 N050–UA4 0.630 0.236 0.020 0.157 GX24–2E300 N030–UA4 0.945 0.118 0.012 0.098 GX24–3E400 N040–UA4 0.945 0.157 0.016 0.118 GX24–3E500 N040–UA4 0.945 0.197 0.016 0.118 GX24–4E600 N050–UA4 0.945 0.236 0.020 0.138 a a a a a a a a a a b b b b b b b b b b l = overall length For cutting speed recommendations see page 24. Insert width 0.236 0.197 0.157 0.118 0.098 0.079 0.002 16 0.004 0.006 0.008 0.010 0.012 0.014 0.016 0.018 Feed WPP 23 WAK 30 GX16–1E200 N020–UA4 K WAK 20 ap max in WSP 43 r in WSM 33 s in M WSP 43 l in Designation WSM 33 ap max WPP 23 P UD6 – the universal one for Stainless Steel The right cutting edge for –– Grooving and groove-turning –– Medium feed range –– Soft cutting, thus low cutting forces 20° 15° Optimum indexable insert for: Cutting edge design 6° good moderate poor machining conditions GX–UD6 coated grades GX16–1E200 N020–UD6 0.630 0.079 0.008 0.098 GX16–1E250 N020–UD6 0.630 0.098 0.008 0.098 GX16–2E300 N030–UD6 0.630 0.118 0.012 0.118 GX16–3E400 N040–UD6 0.630 0.157 0.016 0.138 GX16–3E500 N040–UD6 0.630 0.197 0.016 0.138 GX16–4E600 N050–UD6 0.630 0.236 0.020 0.157 GX24–2E300 N030–UD6 0.945 0.118 0.012 0.098 GX24–3E400 N040–UD6 0.945 0.157 0.016 0.118 GX24–3E500 N040–UD6 0.945 0.197 0.016 0.118 GX24–4E600 N050–UD6 0.945 0.236 0.020 0.138 b b b b b b b b b b a a a a a a a a a a l = overall length For cutting speed recommendations see page 24. Insert width 0.236 0.197 0.157 0.118 0.098 0.079 0.002 0.004 0.006 0.008 0.010 0.012 0.014 0.016 0.018 Walter Cut – Grooving and groove-turning Feed 17 WSP 43 b b b b b a b b b b S WAM 20 b b b b b a b b b b K WPP 23 WXM 33 ap max in WAM 20 r in M WSP 43 s in WPP 23 ap max l in Designation WXM 33 P CE4 – the universal one The right cutting edge for –– Grooving and parting off operations –– Moderate to high feeds –– Excellent chip formation 12° 20° Optimum indexable insert for: Cutting edge design 6° good moderate poor machining conditions GX–CE4 coated grades 0.008 GX24–2E300 N020–CE4 0.945 0.118 0.008 GX24–3E400 N030–CE4 0.945 0.157 0.012 GX24–3E500 N030–CE4 0.945 0.197 0.012 GX24–4E600 N030–CE4 0.945 0.236 0.012 a a a a b b b b b b c c c c c c a a a a a a c c c c c c WSP 43 0.008 0.118 S WSM 33 0.98 0.654 K WPP 23 0.654 GX16–2E300 N020–CE4 WSP 43 GX16–1E250 N020–CE4 WSM 33 r in WSP 43 s in WSM 33 l in Designation M WPP 23 P b b b b b b b b b b c c c c c c l = overall length For cutting speed recommendations see page 24. Insert width 0.236 0.197 0.157 0.118 0.098 0.079 0.002 18 0.004 0.006 0.008 0.010 0.012 0.014 0.016 0.018 Feed GD3 – the soft cutting one The right cutting edge for –– Very soft cutting action –– Light to moderate feeds –– General parting off and grooving operations 9° Optimum indexable insert for: Cutting edge design 6° good moderate poor machining conditions GX–GD3 coated grades 0.008 GX16–2E300 N030–GD3 0.630 0.118 0.012 GX16–3E400 N040–GD3 0.630 0.157 0.016 GX16–3E500 N040–GD3 0.630 0.197 0.016 GX16–4E600 N050–GD3 0.630 0.236 0.020 GX24–2E300 N030–GD3 0.945 0.118 0.012 GX24–3E400 N040–GD3 0.945 0.157 0.016 GX24–3E500 N040–GD3 0.945 0.197 0.016 GX24–4E600 N050–GD3 0.945 0.236 0.020 WSP 43 0.008 0.098 WSM 33 0.079 0.630 WPP 23 0.630 GX16–1E250 N020–GD3 WSP 43 GX16–1E200 N020–GD3 WSM 33 r in S WSP 43 s in K WSM 33 l in Designation M WPP 23 P a a a a a a a a a a b b b b b b b b b b c c c c c c c c c c a a a a a a a a a a c c c c c c c c c c b b b b b b b b b b b b b b b b b b b b c c c c c c c c c c l = overall length For cutting speed recommendations see page 24. Insert width 0.236 0.197 0.157 0.118 0.098 0.079 0.002 0.004 0.006 0.008 0.010 0.012 0.014 0.016 0.018 Walter Cut – Grooving and groove-turning Feed 19 Tools for snap-ring grooves NCCE s in 0.024–0.067 0.024–0.098 Tmax in h = h1 in b in 0.079 0.500 0.500 NCCE 12–0808 R/L–GX 09–1 0.079 0.625 0.625 NCCE 16–1010 R/L–GX 09–1 0.118 0.750 0.750 NCCE 20–1212 R/L–GX 16–2 Designation 0.118 1.000 1.000 NCCE 25–1616 R/L–GX 16–2 0.118 1.250 1.000 NCCE 32–8585 R/L–GX 16–2 For inserts see page 21. These tools are also available in Walter Capto™ version. See the Walter general catalog. 20 Type GX 09–1 . . . R/L GX 16–2 . . . R/L Inserts for snap-ring grooves The right cutting edge for –– Best surface quality –– All common snap-ring types –– Minimal burr formation 10° Optimum indexable insert for: Cutting edge design 6° good poor GX16 r in Tmax in GX 09–1S0.60 R/L 0.354 0.024 — 0.030 GX 09–1S0.80 R/L 0.354 0.031 — 0.037 GX 09–1S0.90 R/L 0.354 0.035 — 0.041 GX 09–1S1.00 R/L 0.354 0.039 — 0.045 GX 09–1S1.20 R/L 0.354 0.047 — 0.053 GX 09–1S1.40 R/L 0.354 0.055 — 0.060 GX 09–1S1.70 R/L 0.354 0.067 — 0.072 Designation l in s in GX 09–1S1.95 N 0.354 0.077 0.004 — GX 09–1S2.25 N 0.354 0.089 0.004 — GX 09–2S2.75 N 0.354 0.108 0.004 — GX 09–2S3.25 N 0.354 0.118 0.004 — WTA 33 HC a a a a a a a a a a a l = overall length For cutting speed recommendations see page 24. HC r in Tmax in GX 16–2S0.60 R/L 0.630 0.024 — 0.030 GX 16–2S0.80 R/L 0.630 0.031 — 0.037 GX 16–2S0.90 R/L 0.630 0.035 — 0.041 GX 16–2S1.00 R/L 0.630 0.039 — 0.045 Designation l in s in GX 16–2S1.20 R/L 0.630 0.047 — 0.053 GX 16–2S1.40 R/L 0.630 0.055 — 0.060 GX 16–2S1.70 R/L 0.630 0.067 — 0.072 GX 16–2S1.95 R/L 0.630 0.077 — 0.081 GX 16–2S2.25 R/L 0.630 0.089 — 0.093 GX 16–2S2.75 N 0.630 0.108 0.004 GX 16–2S3.25 N 0.630 0.128 0.004 — — GX 16–3S4.25 N 0.630 0.167 0.008 — GX 16–4S5.25 N 0.630 0.207 0.008 — WTA 33 GX09 moderate machining conditions a a a a a a a a a a a a a Insert width 0.197–0.236 0.157–0.196 0.118–0.157 0.079–0.118 0.024–0.078 0.002 0.004 0.006 0.008 0.010 0.012 0.014 0.018 Walter Cut – Grooving and groove-turning Feed 21 Grade application chart Grades of cutting material for grooving and groove-turning WPP 23 HC – P 20 • HC – S 30 WSM 33 •• HC – M 30 HC – P 35 •• WAM 20 WXM 33 WAK 20 WAK 30 WTA 33 HC – P 45 •• HC – M 45 •• HC – M 20 •• •• HC – M 35 • •• HC – K 20 HC – H 10 •• HC – K 30 HC – P 40 HC – P 10 • •• • HC – K 10 HC = Coated carbide 22 • HC – S 20 HC – P 40 •• •• HC – S 45 WSP 43 H Hard materials Non-ferrous metals •• HC – K 30 S Heat resistant alloys N Cast iron Standard designation K Stainless steel Walter grade designation M Steel Workpiece material group P Primary application Additional application • Application area 01 10 05 20 15 30 25 40 35 45 Coating process Coating composition CVD TiCN + Al2O3 (+TiN) PVD TiAlN + Al2O3 (ZrCN) PVD TiAlN + Al2O3 (ZrCN) CVD TiCN + Al2O3 + HfN PVD Multilayer TiAlN / TiN +ZrCN CVD TiCN + Al2O3 (+TiN) CVD TiCN + Al2O3 (+TiN) CVD TiCN + Al2O3 Walter Cut – Grooving and groove-turning 23 Workpiece material Unalloyed steel¹ P Low-alloyed steel¹ High-alloyed steel and high-alloyed Tool steel¹ Stainless steel¹ M Stainless steel¹ Grey cast iron K Cast iron with spheroidal graphite Malleable cast iron approx. 0.15% C annealed 125 1 approx. 0.45% C annealed 190 2 approx. 0.45% C tempered 250 3 approx. 0.75% C annealed 270 4 approx. 0.75% C tempered 300 5 annealed 180 6 tempered 275 7 tempered 300 8 tempered 350 9 annealed 200 10 hardened 325 11 annealed ferritic/martensitic 200 12 martensitic, tempered 240 13 austenitic2, retained 180 14 pearlitic/ferritic 180 15 pearlitic (martensitic) 260 16 ferritic 160 17 pearlitic 250 18 ferritic 130 19 pearlitic 230 20 Fe based Heat resistant alloys S Titanium alloys 1 and cast steel 2 and austenitic / ferritic Ni or Co based annealed 200 31 hardened 280 32 annealed 250 33 hardened 350 34 cast 320 Alpha + Beta alloys, hardened 3 Rm: tensile strength in MPa = N/mm2 4 The machining group categories can be found in the Walter general catalog. 24 Machining group4 Material group Classification of the main material groups and code letters Brinell hardness HB Cutting data for Walter Cut – grooving and groove-turning – for coated carbide grades 1050 35 3 37 Cutting speed vc [ft/min] WPP 23 WSM 33 WSP 43 WTA 33 WAM 20 WXM 33 WAK 20 660 WAK 30 590 620 590 180 590 590 560 590 560 520 560 490 460 160 520 520 520 490 460 430 150 430 520 490 490 460 430 120 330 490 490 590 520 490 180 520 520 520 490 430 390 140 460 490 620 490 360 330 150 430 460 490 490 330 330 130 300 330 430 430 390 360 180 330 590 520 360 300 260 140 430 460 460 180 590 560 590 590 260 100 360 260 430 360 430 150 520 390 920 490 660 150 980 520 120 920 850 660 240 980 920 520 190 850 790 590 80 490 390 60 430 330 490 300 300 130 130 230 230 200 200 200 200 110 110 Walter Cut – Grooving and groove-turning 25 User Guide – grooving/groove-turning Basic principles General The use of groove-turning tools allows machining steps to be grouped together, saving on the number of tools used. These tools are used in particular for machining between shoulders or when tool positions are limited. A form-fit connection between the insert and insert seat enables both radial and axial forces to be absorbed. This allows grooving and longitudinal turning operations when special chip forming geometries are used. 26 Machining process strategy Grooving We always distinguish between two production strategies: grooving and groove-turning. For grooving, the feed moves in only one direction. Longitudinal turning with a small stock removal (ca. 0.004 – 0.012 inch) takes place only as a finishing pass. Groove-turning Groove-turning is a combination of grooving and longitudinal turning movements. Grooving or groove-turning? Groove-turning The choice of machining process strategy depends on the shape and size of the groove to be produced. As a rule of thumb, the following criteria can be used to make a decision: Groove-turning: The groove width is 1.5 times greater than the groove depth Grooving Grooving: The groove depth is 1.5 times greater than the groove width Walter Cut – Grooving and groove-turning 27 User Guide – grooving User tips For grooving, only one cutting edge is used. Here it is necessary to adhere to certain machining sequences to achieve an optimum result. Producing a small groove with chamfer Grooving with 0.004 inch allowance on diameter Turn the chamfer and finish 1st groove wall Turn the chamfer and finish 2nd groove wall Producing a wide groove by grooving 3 2 3 1 23 12 1 Rough grooving web width = s – 2 x r 5 4 5 45 Rough grooving 4 Finishing ap max = r s = edge width / r = corner radius / ap max = max. cut depth 28 User Guide – grooving Fault analysis Poor surface ‡‡ Align coolant to the cutting edge ‡‡ Select geometry offering greater chip formation ‡‡ Increase the cutting speed ‡‡ Use a smaller corner radius ‡‡ Use a more positive geometry Damage caused by chips ‡‡ Use a geometry offering greater chip formation ‡‡ Lower the cutting speed Poor chip formation ‡‡ Lower the cutting speed ‡‡ Improve coolant ‡‡ Use a geometry with greater chip forming capability Walter Cut – Grooving and groove-turning 29 User Guide – Groove-turning Basic principles Tool must be aligned 90° to the axis of rotation. 0.004"/4.0" This is the only way to guarantee that a clearance angle can be generated when the groove is turned in both directions. Poor tool alignment leads to vibration and can cause tool breakage. Deflection Deflection means the movement of the insert support blade caused by a force [FP]. This deflection is required in order to generate an adjacent clearance angle [a] during the longitudinal turning operation. The degree of deflection is influenced by multiple factors: –– Cut depth [ap] –– Feed [f] –– Cutting speed [vc] –– Corner radius [r] –– Workpiece material to be machined –– Cutting depth of the tool [T] –– Width of the insert support blade Diameter compensation The deflection causes different longitudinal ratios on the tool. In order to generate an even diameter during finishing, a diameter compensation must take place at the transition from grooving to the longitudinal turning movement. 1. Rough turn the workpiece 2. Groove to the final diameter 3. Pull back 0.004 inch 4. Turn longitudinally 5.Measure the groove diameter and turned diameter and correct the pullback dimension (0.004 inch) by the difference in diameter. 30 User Guide – Groove-turning User tips Groove-turning In order to ensure a safe machining process, certain tool paths must be adhered to. For instance, a tool must not be stressed by cutting in two directions at the same time. At all times, ensure that the cutting edge is relieved after grooving before you start the longitudinal turning operation. Transitions from longitudinal turning to grooving requires the cutting edge to be relieved in the same way. Machining sequence At the end of the longitudinal turning operation, pull back against the direction of feed and away from the machined diameter at least 0.004 inch. This clearance allows the cutting edge to return to its original position. The next grooving operation can now follow. Before you transition to the longitudinal turning operation at this point, pull back 0.004 inch again. Walter Cut – Grooving and groove-turning 31 User Guide – Groove-turning User tips Cutting a recess 1. Roughing 1. Groove to a depth equal to the longitudinal turning depth of cut 2. Retract 0.004 inch radially 3. Turn longitudinally 4. Retract 0.004 inch radially and axially 2. Finishing 1. Groove at the radius tangency point to finished diameter and retract Avoiding ring formation 2 3 4 1 1. Turn longitudinally to approximately 0.020 – 0.060 inch before the shoulder 2. Retract diagonally from the corner 3. Position the tool above the ring 4. Remove the ring by a radial grooving operation 32 5. Groove 6. Retract 0.004 inch 7. Turn longitudinally to approximately 0.020 inch before the shoulder 8. Retract 0.004 inch radially and axially 2. Finish the 1st wall and generate the radius 3. Retract by the diameter compensation dimension 4. Turn longitudinally to the radius tangent position 5. Retract 0.004 inch radially and axially 6. Finish the 2nd wall and generate the radius Walter Cut – Grooving and groove-turning 33 User Guide – Groove-turning Fault analysis Vibration during longitudinal turning ‡‡ Check tool alignment (see page 30) ‡‡ Deflection of cutting edge too low (see page 30) ‡‡ Use narrower insert (easier to deflect) ‡‡ Use a smaller corner radius ‡‡ Shorten workpiece overhang Step in machined diameter ‡‡ Correct pullback dimension before finishing cut ‡‡ Ensure even stock allowance ‡‡ Check whether the insert seat is damaged ‡‡ Increase the cutting speed ‡‡ Use a more positive geometry Damage caused by swarf ‡‡ Use a geometry with greater chip forming capability ‡‡ Lower the cutting speed ‡‡ Optimize coolant Ring formation ‡‡ Check program sequence (see page 32) Poor chip formation ‡‡ Lower the cutting speed ‡‡ Increase the feed ‡‡ Improve coolant ‡‡ Use a geometry with greater chip forming capability 34 User Guide – grooving/groove-turning Wear analysis Flank face wear ‡‡ Use a more wear-resistant grade ‡‡ Reduce the cutting speed ‡‡ Improve coolant Plastic deformation ‡‡ Use a more wear-resistant grade ‡‡ Reduce feed ‡‡ Optimize coolant ‡‡ Reduce the cutting speed Chipping ‡‡ Use tougher grades of carbide ‡‡ Use a more rigid tool ‡‡ Use stronger geometries ‡‡ Use wider inserts if necessary Built-up cutting edge ‡‡ Increase the cutting speed ‡‡ Use a more positive geometry ‡‡ Optimize coolant Crater wear ‡‡ Reduce the cutting speed ‡‡ Use more positive geometry ‡‡ Use a more wear-resistant grade ‡‡ Optimize coolant Notching or oxidation ‡‡ Reduce the cutting speed ‡‡ Reduce feed Walter Cut – Grooving and groove-turning 35 Hardness comparison table Tensile strength, Brinell, Vickers and Rockwell hardness (extract from DIN 50150) Tensile strength [N/mm2] Vickers hardness HV 36 Brinell hardness HB Rockwell hardness HRC HRC Rm HV HB 255 270 285 305 320 335 350 370 385 400 415 430 450 465 480 495 510 530 545 560 575 595 610 625 640 660 675 690 705 720 740 755 770 785 800 80 85 90 95 100 105 110 115 120 125 130 135 140 145 150 155 160 165 170 175 180 185 190 195 200 205 210 215 220 225 230 235 240 245 250 76.0 80.7 85.5 90.2 95.0 99.8 105 109 114 119 124 128 133 138 143 147 152 156 162 166 171 176 181 185 190 195 199 204 209 214 219 223 228 233 238 20.3 21.3 22.2 820 255 242 23.1 835 260 247 24.0 850 265 252 865 270 880 275 Tensile strength [N/mm2] Vickers hardness HV Brinell hardness HB Rockwell hardness HRC HRC Rm HV HB 900 280 266 27.1 915 285 271 27.8 930 290 276 28.5 950 295 280 29.2 29.8 965 300 285 995 310 295 31.0 1,030 320 304 32.2 1,060 330 314 33.3 1,095 340 323 34.4 1,125 350 333 35.5 1,155 360 342 36.6 1,190 370 352 37.7 1,220 380 361 38.8 1,255 390 371 39.8 1,290 400 380 40.8 1,320 410 390 41.8 1,350 420 399 42.7 1,385 430 409 43.6 1,420 440 418 44.5 1,455 450 428 45.3 1,485 460 437 46.1 1,520 470 447 46.9 1,555 480 (456) 47.7 1,595 490 (466) 48.4 1,630 500 (475) 49.1 1,665 510 (485) 49.8 1,700 520 (494) 50.5 1,740 530 (504) 51.1 1,775 540 (513) 51.7 1,810 550 (523) 52.3 1,845 560 (532) 53.0 1,880 570 (542) 53.6 24.8 1,920 580 (551) 54.1 257 25.6 1,955 590 (561) 54.7 261 26.4 1,995 600 (570) 55.2 Turning calculation formulas Tensile strength [N/mm2] Vickers hardness HV Brinell hardness HB Rockwell hardness HRC Rm HV HB HRC 2,030 610 (580) 55.7 2,070 620 (589) 56.3 2,105 630 (599) 56.8 2,145 640 (608) 57.3 2,180 650 (618) Number of revolutions vc x 12 [rpm] Cutting speed 57.8 660 58.3 670 58.8 680 59.2 690 59.7 700 60.1 720 61.0 740 61.8 760 62.5 780 63.3 800 64.0 820 64.7 840 65.3 860 65.9 880 66.4 900 67.0 920 67.5 940 68.0 12 [ft/min] Feed rate [in/min] Engagement time The hardness values converted i.a.w. these tables are approximate only. See DIN 50150. n Dc vc vf f th lm Number of revolutions Drill diameter Cutting speed Feed rate Feed per revolution Engagement time Length of cut rpm in ft/min in/min in min in Tensile strength N/mm2 Rm Vickers hardness HV Diamond pyramid 136° Testing force F ≥ 98 N Brinell hardness HB Calculated from: HB = 0.95 x HV 0.102 x F/D = 30 N/mm F = testing force in N D = sphere diameter in mm HB Rockwell hardness C Diamond cone 120° Overall testing force 1471 ± 9 N HRC 2 HV 2 Walter Cut – Grooving and groove-turning 37
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