The metal jewelry laser welding machines developed and manufactured by our company adopt ceramic focusing cavities, which are corrosion-resistant, high-temperature resistant, and offer high photoelectric conversion efficiency. The focusing cavity and xenon lamp have a service life of over 8 million cycles. The output of protective gas ensures aesthetically pleasing welds without oxidation or discoloration. The machine is capable of 24/7 continuous operation with stable overall performance.

Laser welding’s advantage of localized, small-area heating makes it widely applicable in industries such as jewelry, batteries, and mobile phone components.

Laser welding is characterized by high welding strength, fast speed, and low scrap rates, making it widely used in modern manufacturing. In jewelry production, it offers distinct advantages over traditional welding technologies:

1.Fast Speed, High Strength, Minimal Deformation, No Post-Welding Straightening or CleaningThe primary reason jewelry manufacturers adopt laser welding is its fast speed and minimal deformation, eliminating the need for post-welding straightening and cleaning. While laser welding is faster than traditional flame welding, operators typically hold workpieces by hand or use fixtures, welding one piece at a time. Most jewelry laser welding workspaces are compact, limiting batch processing capacity and slightly increasing welding time. However, the time saved on cleaning fully compensates for this. Laser welding can be performed under inert gas protection, leaving no fire stains on products—eliminating the need for flux during welding and acid pickling afterward. Overall, laser welding delivers higher production efficiency.

  2.Suitable for Precision Workpieces, Ensuring Consistent Quality

The laser beam can be focused into a tiny spot for precise positioning, making it ideal for mass automated production. It not only significantly improves efficiency but also minimizes the heat-affected zone and ensures contamination-free welds, greatly enhancing welding quality and reducing scrap rates. For example, 14K alloy jewelry (58% Au, 2% Ag) welded by flame welding may experience Ag annealing, reducing the overall hardness from Hv=145 by approximately half—resulting in dents if dropped from waist height. In contrast, low-power, high-speed laser welding concentrates heat, preventing workpiece annealing and preserving structural strength.

3.High Assembly Precision, Enabling Innovative Jewelry Production Processes The introduction of laser welding in the jewelry industry has transformed traditional design thinking. It enables the creation of special-structured jewelry styles that were previously difficult to achieve or failed to meet quality requirements with traditional welding. Laser welding operates in a narrow area, facilitating the welding of different alloy materials without intermixing—allowing abrupt color or structural transitions between components. Its narrow working zone distinguishes it from traditional welding in terms of wettability, joint integrity, and grain size in the heat-affected zone.

4.Excellent Consistency and Stability

Laser welding typically achieves direct welding by locally melting workpieces without the need for filler metals or flux

5.Simplifies Workpiece Repair

It can repair metal near gemstones, eliminate holes in castings, and weld areas as close as 0.2mm to complex, heat-sensitive components (e.g., hinges, hooks, clasps, and settings).

6.Environmentally Friendly

No solder, flux, or chemical cleaning agents are required during laser welding, eliminating waste disposal issues.

7.Saves Metal Materials

Traditional welding requires a minimum metal thickness of 0.2mm, while laser welding reduces this to 0.1mm—reducing jewelry weight by 35%~40%, which is particularly important for electroformed products. Laser welding saves precious metals and solder, and eliminates the need for different solder types in multiple welding passes.

8.Key Machine Features

Jewelry laser welding machines commonly used in the industry have low power, ensuring high safety. They feature a compact, portable design, allowing operators to work comfortably while seated.
Typical jewelry laser welding machines can weld most metals and alloys quickly, reliably, and accurately, though efficiency largely depends on the target material’s properties. Continuous assembly or casting repair can be completed with one or more laser pulses under visual control, with each pulse lasting 1~20ms. Stereomicroscopes and crosshair alignment enable precise positioning of welding areas, allowing fine adjustments of workpiece position within the field of view. Welding is usually performed in atmospheric conditions; injecting air or inert gas into the working area can provide cooling, and inert gas further improves alloy welding quality.

9.Influence of Alloy Materials on Laser Welding Performance
Different alloy materials yield varying laser welding results. Under the same machine parameters and pulse heat input, differences in the proportion of thermal energy absorbed (vs. reflected) by the alloy surface lead to varying melting effects per pulse. Key influencing factors include heat capacity (from room temperature to melting point), melting point, latent heat of fusion, and thermal conductivity. Variations in these properties across materials significantly affect the energy required for effective welding—sufficient surface heat absorption is essential for successful welding.