Laser Treatment System EM-270M

Laser Treatment System is designed for broaching profile channels (holes) in hard and superhard materials, such as natural and synthetic diamond, ruby, hard allows, aluminum ceramics, etc.

Using this technology profile channels (holes) which meet strict requirements to surface geometry and roughness are processed during one completely automated laser treatment operation, and there is no need to reset a part processed.

The primary application is to broach profile channels (holes) in diamond and diamond-like dice used to produce metalcords, cable wires, and other products made by drawing through the grooved die holes.

The technology covers practically the whole diameter range of industrial diamond dice from 0.1 to 5.0 mm. The accuracy of treatment is 2% of die diameter. The attainable accuracy of treatment in finishing mode is 3 mm.
The system is also suitable for die repair (profile channel boring), products treatment around the inner and outer contours. Laser marking of die frame surfaces can be operated as well. Combined laser and TV channels enable receipt on SVGA “live” videopicture of the object for orientation of the workpiece and further inspection of treatment quality and processed hole diameter.
A solid-state Nd:YAG  laser with Q-switch is used in the system as a laser source. Service life of laser heat is at least 10000 hours. Service life of pump lamp is at least 400 hours.

Laser power supply and cooling unit contains the system for selection and stabilisation of cooling water temperature. This allows to maintain the average power of laser radiation at high stability level. Interlocks of minimal flow of the cooling water and of its max temperature allows to enhance  reliability and service life of the laser.

The Laser Treatment System is controlled by IBM PC. Working program is made both with the use of own graphics editor and AUTOCAD editor. The computer allows to automatically select an optimum travel algorithm and the laser Q-switch control depending on the thickness of the processed material, its shape and contour of laser processing.

Laser

*Type Q-switched, Nd:YAG, Lamp pump *Operating mode TEM00, circular and linear polarisation *Wave Length 1064 nm *Average Power 15 Watt *Pulse Width ~ 85 ns Q-Switch Frequency 1-25 kHz

Positioning System

Field Size 25 х 25 mm Precision 3 µm Speed of linear movement up to 5 mm/s Drive ** 5-coordinate step drive *Power requirements 380/230 V, 50 Hz, 6.5 kW *Overall dimensions 1500 x 900 x1400 mm *Weight 550 kg Note: - features marked * are reference data.

**) Drive:
5-coordinate step drive with feedback on a position controlled through Pentium IBM PC

TV-channel enables receipt on SVGA monitor “live“ videopicture of the object for orientation of the workpiece followed by inspection of the processed hole diameter.

The control system is based on PC and provides the following:

• control to all drives in automatic processing mode and orientation mode;
• storage and automatic selection of  treatment modes according to preset process  parameters;
• editing of profile channel layout within its own program;
• editing of marking layout using AUTOCAD;
  
• editing of scribing layout within its own program;
• inspection of average laser power with display of pictogram on computer screen;
• control to R.F. driver;
• display on computer screen of TV-picture of surface of the workpiece during its orientation;
• display on TV-screen of the on-line information (absolute and relative coordinates of the stage, process steps, prompting of operations sequence, treatment time, error warning, etc.);
• execution of special debugging operations (search for beam focus, its alignment with finder cross-hairs, etc.);
• creation and storage of the library of programs of operations including type of operation (via cutting, scribing), layout pattern and list of process parameters;
• power-units diagnostics.
  

• Ambient temperature: 22°C±5°C
• Relative humidity: not more than 85%
• Power requirements: 3-phase 4-wire with neutral 380/220VAC, (50±2%) Hz, impulse noises protected.
  Maximum voltage deviation from nominal: 10 %. For power supply a separate electric power line must be used. High-voltage and switching equipment like welding devices , electrical ovens, metal-cutting machines, etc. must not be connected to the distribution board of this line.
• Compressed air to be supplied to the system under pressure 0.5...0.6 Mpa (5...6 kgf/cm²). Compressed air consumption is 1.5 m³/h. Compressed air shall be supplied by means of a flexible PVC pipe with outer diameter 10 mm and wall thickness 1.5 mm. The temperature of the air to be supplied to the system shall not deviate from the room temperature more than 5°C.
• The system must be connected to the vacuum with residual pressure (3.4...4)*10⁴ Pa, the connection shall be supplied by means of a flexible PVC pipe with inner diameter 6 mm.
• The system must be connected to exhaust ventilation line with the pressure not less than 10 kPa (or to a vacuum cleaner with power at least 1 kW).
  The system should be connected to exhaust ventilation by means of flexible corrugated tube with inside diameter 34 mm and outside diameter 43mm (supplied).
• Water under pressure 0.1...0.2 Mpa (1...2 kgf/cm²) with flow rate not less than 10 l/min and temperature not more than 18°C with free drain of waste water.
• The inner laser cooling system is filled with distilled water (10 liters).
• Grounding.
• Floor space 10 m².