12 precision processes from steel billet to finished product for necklaces

1. Precision stamping

0.8mm thick 316L steel plate is cut by a 200 ton punch press, with a blank error of ≤ 0.01mm, and a production capacity of 5000 pieces per hour.   

2. Laser micro carving

20W fiber laser engraving text/patterns, adjustable depth of 0.1-0.3mm, customized for a couple, can engrave 20 Chinese characters on the inside of the necklace.   

3. PVD vacuum coating color

The thickness of the rose gold and gun black coating is 1.5 μ m, and the wear resistance is 8 times that of water electroplating. It does not fade after more than 72 hours of salt spray testing.   

4. Magnetic fluid polishing

Nano level polishing results in a surface roughness of ≤ Ra0.1 μ m, achieving a mirror like effect with a texture comparable to that of thousand yuan silver jewelry.   

5. Intelligent quality inspection

The AI vision system detects 0.02mm scratches and automatically sorts defective products, increasing the yield rate to 99.6%.   

Innovative technology: The "temperature sensitive color changing coating" developed by Shenzhen Hengdaxin creates a gradient color for necklaces under the influence of body temperature, with TikTok's best-selling product selling over 100000 pieces per month.