ROFIN-SINAR Diode pumped Nd:YAG Laser

ROFIN-SINAR Diode pumped Nd:YAG Laser 5/2000 - RSL - 1

Diode-pumped Nd:YAG laser DY Series ROFIN DY x55-022 (550 W - 2200 W) ROFIN DY 027-044 (2700 W - 4400 W) 5/2000 - RSL - 2

Diode-pumped Nd:YAG laser ROFIN DY 022 Advantages: high beam quality high efficiency virtually maintenance free (typ. diode lifetime > 10,000 h) 5/2000 - RSL - 3

The principle of a Nd:YAG laser Lamp pumped Diode pumped 7 3 4 1 7 4 1 4 5 6 8 2 9 1. Active Medium (Nd:YAG crystal) 2. Output mirror 3. Rear mirror 4. Excitation (Pump lamps) 5. Pump light 6. Cooling water 7. Reflector 8. Stimulated emission 9. Laserbeam 1. Nd:YAG crystal 2. Laser beam 3. Outcoupling mirror 4. Diode arrays 5. Collimating optic 6. Rear mirror 7. Cooling 8. Electrical supply 5/2000 - RSL - 4

Diode-pumped Nd:YAG laser ROFIN DY 022 5/2000 - RSL - 5

Diode pumped Nd:YAG laser ROFIN DY 044 5/2000 - RSL - 6

ROFIN DY Series Model DY x55 DY 011 DY 016 DY 022 DY 033 DY 044 Max. Output Power 550 W 1100 W 1650 W 2200 W 3300 W 4400 W Number of Cavities 1 2 3 4 6 8 Beam Quality 12 mm x mrad Effective power (at nominal power) PC Control 10 kw 19 kw 27 kw 37 kw 64 kw 73 kw Touch Screen PC, Windows NT 5/2000 - RSL - 7

Technological disadvantages of lamp pumped CW Nd:YAG lasers Consequences of the low efficiency < 3 % * : High investment cost for laser and chiller Cost intensive power supply installation because of high connected loads for laser and chiller High running cost because of high energy consumption Consequences of high lamp wearing: Short maintenance intervals (300-1000 h) Unpredictable down times because of statistical lamp failures Cost intensive redundant laser system concepts for high production availabilities High running cost because of high lamp consumption * Highest process efficiency, reliability and flexibility for cutting and welding is so far industrially approved (CO 2 lasers) with laser focal spot sizes of 0,15-0,3 mm ata focal length between 100 and 200 mm. Related beam qualities in the range of 10 mm x mrad can be realised with lamp pumped Nd:YAG lasers only with electrical efficiencies of less than 2%. 5/2000 - RSL - 8

Some main differences between CW Nd-YAG laser lamp and diode pumped Description Nominal power W Beam Quality mm*mrad Fiber Optic Diameter µm Mains Power kw (without chiller) Lamp lifetime (hours) Guaranted diode lifetime (hours) Lamp pumping Diode pumping Lamp pumping Diode pumping 350 500 700 550 1.000 1.000 1.100 12 25 12 12 25 12 12 300 600 300 300 600 300 300 20 23 40 11 45 60 16 500-1.000 -- 500-1.000 -- 10.000 -- 10.000 5/2000 - RSL - 9

Savings* of diode pumped versus lamp pumped Nd:YAG-lasers Laser Savings* diode pumped lamp pumped at 0,14 DM/kWh at 0,21 DM/kWh at 0,21 DM/kWh*** Power** [W] BQ [mmxmrad] Power** [W] BQ [mmxmrad] [DM] [DM] [DM] 500 12 700 12 > 110.000 > 160.000 > 130.000 1000 12 1000 12 > 105.000 > 160.000 > 130.000 1500 12 2000 25 > 155.000 > 240.000 > 200.000 2000 12 3000 25 > 290.000 > 415.000 > 360.000 2500 12 3000 25 > 130.000 > 250.000 > 200.000 3000 12 4000 25 > 265.000 > 430.000 > 365.000 4000 12 5000 25 > 260.000 > 465.000 > 390.000 * in terms of investment and running costs for an operation time of 20.000 h respectively 4 years in 3 shift operation at 50% on time of the laser ** power at the work-piece, controlled for a lamp life time of 2.000 h respectively a diode life time of 20.000 h diode pumped Nd:YAG laser ROFIN DY 0XX with a beam quality (BQ) of 12 mmxmrad (0,3 mm focal diameter at 200 mm focal length) are saving related to the application 20-30 % beam power in comparison to lamp pumped lasers for similar cutting and welding speeds *** related to investment and running costs for an operation time of 10.000 h respectively 2 years in 3 -shift operation at 100 % on time of the laser 5/2000 - RSL - 10

Advantages of the high beam quality for cutting and welding applications A B smaller focal diameter higher process efficiency (higher speed or less power requirement) HQ conventional processing head processing head for a laser with high beam quality slim and shorter optic low heat input higher process flexibility HQ C larger working distance HQ working area with difficult accessibility HQ = increase of the process flexibility by high beam quality 5/2000 - RSL - 11

Comparison of welding speeds with ROFIN CW 018 and ROFIN DY 011 ROFIN CW 018* ROFIN DY 011* 12 lamp pumped (25 mm*mrad) Material: mild steel 12 diode pumped (12 mm*mrad) 10 10 welding speed [m/min] 8 6 4 welding speed [m/min] 8 6 4 2 2 0 0 0,5 1 1,5 2 2,5 3 3,5 welding depth [mm] 0 0 0,5 1 1,5 2 2,5 3 welding depth [mm] * Beam power: 1 kw on the workpiece at a focal length of 120 mm 5/2000 - RSL - 12

Aluminium welding byrofin DY022* at focal length between 120 and 200mm (Schweißen von Aluminium mit DY022 bei Brennweiten zwischen 120 und 200mm) 16,0 focal length : 120mm speed / Geschwindigkeit [m/min] 14,0 12,0 10,0 8,0 6,0 4,0 fl 200mm 2,0 0,0-0,5 1,0 1,5 2,0 2,5 3,0 3,5 4,0 4,5 sheet thickness / Materialstärke [mm] * welding in full material penetration / Schweißen in voller Materialstärke Diese Werte basieren auf Versuchen, die mit der bei ROFIN-SINAR installierten Systemtechnik durchgeführt wurden. Bei Verwendung kundenspezifischer Systemtechnik können die Werte abweichen. These values base on trials taken with application units installed at ROFIN-SINAR. Customer results may differ depending on components installed. 5/2000 - RSL - 13

Stainless steel welding by ROFIN DY022* at focal length between 120 and 200 mm (Schweißen von Edelstahl mit DY022 bei Brennweiten zwischen 120 und 200 mm) 12 speed / Geschwindigkeit [m/min] 10 8 6 4 2 focal length: 200mm - 120mm fi 0 0 0,5 1 1,5 2 2,5 3 3,5 4 4,5 welding depth / Einschweißtiefe [mm] * 8 mm thick test coupon, welding in full material penetration allows higher speeds / 8 mm dicke Schweißproben, das Schweißen in vollständiger Materialstärke erlaubt höhere Schweißgeschwindigkeiten Diese Werte basieren auf Versuchen, die mit der bei ROFIN-SINAR installierten Systemtechnik durchgeführt wurden. Bei Verwendung kundenspezifischer Systemtechnik können die Werte abweichen. These values base on trials taken with application units installed at ROFIN-SINAR. Customer results may differ depending on components installed. 5/2000 - RSL - 14

Mild steel welding by ROFIN DY022* at focal length between 120 and 200 mm (Schweißen von Baustahl mit DY022 bei Brennweiten zwischen 120 und 200mm) 12 speed / Geschwindingkeit [m/min] 10 8 6 4 2 focal length: 200mm - 120mm fi ** 4mm St 52 1,3 m/min 0 0 0,5 1 1,5 2 2,5 3 3,5 4 4,5 welding depth / Einschweißtiefe [mm] * 8 mm thick test coupons / 8 mm dicke Schweißmuster ** welding in full material penetration allows higher welding speeds / Das Schweißen in vollständiger Materialstärke erlaubt höhere Schweißgeschwindigkeiten. Diese Werte basieren auf Versuchen, die mit der bei ROFIN-SINAR installierten Systemtechnik durchgeführt wurden. Bei Verwendung kundenspezifischer Systemtechnik können die Werte abweichen. These values base on trials taken with application units installed at ROFIN-SINAR. Customer results may differ depending on components installed. 5/2000 - RSL - 15

Laser Screen 5/2000 - RSL - 16

Edit Pulse 5/2000 - RSL - 17

Fault Screen 5/2000 - RSL - 18

Numeric Entry 5/2000 - RSL - 19

Help Manual 5/2000 - RSL - 20