SYRIUS LASER REPAIR 150 QCW laser welding machine

Properties

Short description

The SYRIUS LASER REPAIR 150 QCW laser welding machine is specially designed for the tool manufacturing and repair industries , primarily used for precision tool repair. It enables line and spot welding by taking advantage of the advantages of laser welding. It effectively handles welding defects on small parts, so it can also perform repair work. This technical advantage fills the shortcomings of traditional TIG (argon shielding gas) welding and TIG spot welding, which cannot achieve the precision requirements of fine welded surfaces.

Laser welding can not only be used to repair tools, but also to modify the design size of tools, shortening the product development time. During the operation, the machine operator can adjust the output power, frequency and pulse width and other parameters through the touch panel. The welding head can also be moved forward or backward to achieve high welding efficiency. Different waveforms can be set according to the welding materials to make the welding parameters meet the welding requirements, produce flat and clean welds and points, thus optimizing the welding.

The equipment is especially suitable for precision manufacturing, shaping and repairing of plastic injection molds, compression molds, extrusion molds, glass molds, plastic blow molds and rubber molds. In addition, it can also be used for welding all kinds of small and precision metal parts (gold, platinum, titanium, silver, copper-nickel, aluminum, magnesium, stainless steel, etc.) with or without filler metal.

Features of laser repair welding:

• The diameter of the welding spot is only 0.2-3 mm, so high accuracy can be achieved.
• The laser wavelength is 1064 nm.
• The small heat zone ensures that the workpiece is not deformed and the seam does not foam.
• It compensates for the shortcomings of traditional argon arc welding and pressing in repairing fine surfaces.
• Typically a workpiece free of minor oxidation effects and color changes.
• Welding operations can be performed in narrow spaces or recesses, it does not cause damage to the surrounding walls, and there should be no wind burns at the edge of the weld.
• The edge does not burn when repairing delicate parts.
• Joystick control, movable workpiece.
• Using a microscope, even the tiniest parts can be clearly seen.
• Matching of different welding wires, casting materials, polishing and texturing can also be implemented
• It is characterized by excellent cost-effectiveness in case of modification or improvement of both raw materials and labor.

The machine uses a QCW laser.

• Optics: Focuses the laser light onto the workpiece.
• Other components: high voltage electrodes, insulating base plate, positioning bracket, adjustable membrane frame and laser holder.

The machine can be operated using the keys on the control panel or the joystick.

An LC oscillator is used to excite the pulsed laser. The control circuit is controlled by a single-chip microprocessor, which can be used to adjust the power output energy and repetition rate. The system also has multiple interlocked protection to ensure emergency shutdown of the power under abnormal conditions.

Optical system

Two off-focus modes are available: positive off-focus (when the focal point is above the workpiece) and negative off-focus (when the focal point is below the workpiece).

According to the theory of geometric optics, if the positive off-focus distance is equal to the negative off-focus distance, the power densities on the workpiece plane will approach each other.

However, the shape of the melting zone is different. Under the condition of negative off-focus, a large penetration depth can be achieved, which is related to the formation of the melting zone. Experiments show that when the material is heated by laser for 50~200us, it begins to melt, forming a liquid phase metal, and its vapors expel the melt from the melting zone at an extremely high speed.

Under negative off-focus conditions, the power density inside the material is even higher than at the surface, which is apt to cause stronger melting and evaporation, which transmits optical energy deeper into the material.

Therefore, in actual applications, when a large penetration depth is required, negative off-focus should be used. When welding thin materials, positive off-focus is required.

Microscope

The equipment adopts a binocular stereomicroscope, which has a clear and depth-sensing vision. A coated protective glass is placed in front of the objective lens to avoid contamination caused by metal splashes during processing. For transportation and storage, the eyepiece can be removed by loosening the fixing screws.

Laser expansion and focusing system

The machine adopts a design where both the laser and microscope beam paths share the same objective lens. The focus set is determined by the welding process and can be adjusted by scaling with an out-of-focus handle.

Welding point marking

The objective lens has a calibratable crosshair whose intersection overlaps with the laser power point.

Advantages:

• Precise, targeted repair
• Only the surface to be repaired is affected, intact parts are not damaged
• Widely applicable, the laser is mostly mobile

Disadvantages:

• not economical for machining large surfaces

Areas of application for tool repair with laser welding:

• Wherever expensive metal parts need to be replaced
• Injection mold repair work (surface damage, cracks, broken pieces, reshaping blunt edges)
• Closing planes, burr removal, ejector welding, extension
• Cutting tools-Turbines / gears

ACCESSORIES

The entire system consists of four parts:

control cabinet

power supply

laser (with built-in cooling system) and optical system.

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