Jewelry Laser Welding Machine
It took until 1928 for the first experiment to prove Einstein’s theories. From there, however, it took another 32 years until the first laser beam could actually be generated with a ruby in 1960. The expensive ruby was replaced a short time later by gas, which made the production of laser devices much cheaper. For Phoenix Laser Solutions, this capability is a key competitive advantage for the business. Besides the precision of the process itself, pulsed laser welding lets them work with a wide variety of materials and weld dissimilar materials.
High energy density, small deformation, very narrow heat-affected zone, high depth to width ratio of the weld seam, high welding speed and easy automatic control. Laser welding has a considerable depth of melt and high power density, which can weld refractory materials, such as titanium alloys, etc. Laser welding is a non-contact welding process that does not require pressure, but requires the use of inert gas to prevent oxidation of the molten pool, which is occasionally used for filler metals.
Therefore, the general plate butt assembly gap and spot seam deviation should not be greater than 0.1mm, the wrong side should not be greater than 0.2mm. Negative defocusing, greater depth of melt can be obtained, which is related to the formation process of the melt pool. When the surface temperature of the material rises to the melting point, the reflectivity decreases rapidly, and when the surface is in a melted state, the reflection is stabilized at a certain value. It can moderate the accuracy requirement of the interface of the base material end face. It can increase the depth of melt, improve the weld formation, and obtain high-quality welded joints. The weld channel solidifies relatively quickly and may have porosity and embrittlement defects.
Using negative defocus can increase penetration, while in pulse welding, positive defocus will make the weld surface smoother and more beautiful. This waveform can be adjusted appropriately when welding samples of different types. The slow-down part of the welding waveform has a longer pulse width, which can effectively reduce the occurrence of pores and cracks. The rising phase of the waveform is to provide greater energy to melt the aluminum alloy.
The high-speed laser scanning galvanometer is compact in design, and the temperature drift is specially optimized to improve the long-term stability of 50%. The sealing performance is good, waterproof and dustproof, small size, and high speed. By controlling and changing the direction of the light beam, precise positioning, compactness, robustness, superior power, and super stable performance are ensured to ensure continuous and trouble-free operation for a long time.
Given that tool steels for cores and cavities are typically hardened to about RC , that’s a 20-30% reduction in hardness. With pulsed laser welding, the softening is much lower, about 2 to 4 points RC. The pulsing of the beam (typically about 5-30 pulses per second) allows very fine control of how much energy is being directed to the weld. The laser is directed in high-energy bursts that allow the welder to move at a higher speed without generating more heat than necessary. With pulsed laser welding, a very precise beam is aimed at the filler material as it is laid down. Besides being more accurate to position, the width of the beam is highly controllable, with Alpha’s welding lasers, between 0.2 and 2.0 mm in diameter.