In the high-end manufacturing field, the mirror brushed effect on the metal surface has become a quality benchmark - from the dazzling luster of watch cases to the delicate texture of luxury luggage, all rely on the precision machining capabilities of professional equipment. To achieve a truly "flawless mirror", it is necessary to break through the three major technical bottlenecks of traditional wire drawing processes: surface roughness (Ra value) control, material adaptability, and efficiency ceiling.
Nano scale sand belt and pressure synergistic technology
The traditional wire drawing process is limited by the mesh size of the sand belt (usually up to # 3000 mesh) and pressure fluctuations, making it difficult to stably control the Ra value below 0.1 μ m. The new generation of equipment adopts composite coated sand belts, which are combined with nano diamond particles and resin to achieve a grit of over 10000. Combined with a gas-liquid mixing pressure system (accuracy ± 0.5N), the Ra value of materials such as stainless steel and titanium alloy can be reduced to 0.05 μ m, comparable to the mirror surface effect of manual polishing. According to actual tests conducted by a luxury watch company in Switzerland, after adopting this technology, the time required for the case drawing process has been reduced from 45 minutes to 8 minutes, and the texture uniformity has been improved by 90%.
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Multi axis linkage and dynamic compensation system
Mirror drawing requires overcoming the processing difficulties of complex structures such as curved surfaces and edges. Professional equipment achieves a 0.001 ° angle fine-tuning capability through the linkage design of a 7-axis robotic arm and a high-precision turntable. For example, in the processing of chrome plated decorative strips for automobiles, the system can adjust the contact area and pressure of the sanding belt in real time according to the curvature of the curved surface, avoiding over grinding of the edges or flat faults. At the same time, equipped with real-time laser monitoring and PID dynamic compensation algorithm, even when facing dissimilar metal splicing parts with a hardness difference of HRC 10 (such as titanium+steel), the Ra value fluctuation can still be maintained within ± 0.02 μ m.
Innovation of zero pollution mirror technology
Traditional mirror processing relies on chemical polishing and manual finishing, which can easily generate wastewater and exhaust gas. New equipment integrates dry electrostatic adsorption+low-temperature plasma cleaning technology:
Adopting a non cutting fluid drawing process, the metal dust recovery rate exceeds 99%;
After processing, the surface is subjected to plasma bombardment, and the thickness of the oxide layer is controlled within 3nm, without the need for secondary electrolytic polishing;
Energy consumption is reduced by 40% compared to traditional processes, and carbon emissions from single piece processing are reduced by 65%.
After a high-end kitchenware brand adopted this equipment, its titanium alloy pot drawing yield rate jumped from 78% to 99.5%, and the surface antibacterial performance improved by 50%, with a 30% increase in product premium space.
