Sample testing of watch crown laser welding is conducted to ensure the weld quality meets specific standards. Stainless steel is the primary material used in the welding process. The weld is required to be firm, with no cracks, deformations, or discolorations.

To achieve high-quality welds, a laser welding machine such as the WF300 and a workbench like the W-PCTL2020 can be used. An FSI-type optical fiber with a core diameter of 0.4mm, along with a collimating and focusing head such as the CF3612080AV, is utilized. The size of the crown and the position of the crown stem inside the faucet require precise laser focus. It is crucial that the crown and stem do not block the laser during the welding process.

Sample testing ensures that the crown stem is welded to the crown accurately and meets the stringent quality standards of the watch industry. With the right equipment and techniques, laser welding can produce high-quality, durable welds suitable for watch crowns.