In the field of manufacturing bicycle related accessories, ensuring dimensional accuracy and improving surface quality is like a delicate craftsmanship, related to the riding experience and product competitiveness.
Precision molds are the cornerstone of dimensional accuracy. From frame tube molds to tiny speed gear molds, they are all carved using high-precision CNC machining technology. In the design stage, advanced CAD/CAM software is used to simulate the accessory molding process, accurately optimize the mold cavity size, and reserve a reasonable material shrinkage margin to ensure that the size of the accessory blank "born" from the mold is almost perfect. During production, the mold is placed in a precisely temperature-controlled injection molding machine, die-casting machine or stamping equipment. The stable temperature environment prevents dimensional deviation caused by thermal expansion and contraction of the material; the key parts of the mold are regularly inspected using a three-coordinate measuring instrument, and even micron-level wear can be detected in time and corrected immediately to ensure the consistency of the size of each batch of accessories.
Processing technology is a sharp blade for carving details. In the mechanical processing stage, the turning and milling parameters are carefully adjusted for aluminum alloy or steel accessories. High-speed cutting combined with micro-lubrication not only ensures smooth machining surfaces, but also strictly controls dimensional tolerances; the tool path is intelligently planned to avoid dimensional cumulative errors caused by frequent reversing. For example, in the processing of hubs, the concentricity of the shaft core and the shell is strictly locked within a very small range. When carbon fiber accessories are formed, the autoclave process follows strict temperature and pressure curves to evenly compact every inch of fiber, so that the size of the molded parts accurately matches the design blueprint, and the dimensional stability after curing is extremely high.
Surface quality control is also strict. The pretreatment of metal accessories uses multiple fine grinding processes, from coarse sand to fine sand, step by step, to smooth out the processing marks, and then chemical polishing or electrolytic polishing to remove burrs and oxide skin at the microscopic level, so that the surface is bright and discerning; the subsequent electroplating and coating processes strictly abide by the specifications, and the thickness of the electroplating layer is evenly monitored to prevent blistering and peeling. Strict degreasing and phosphating before coating ensure strong adhesion of the paint layer and lasting color. The surface of carbon fiber accessories is treated with a special release agent and fine grinding to avoid demoulding defects, and then a UV-proof and wear-resistant transparent coating is applied to preserve the unique texture of carbon fiber while giving it a smooth texture.
Full-process quality inspection is like a loyal guard. From the random inspection of raw materials entering the factory to the first piece inspection, patrol inspection and final inspection of finished products on the production line, the dimensional measurement tools are checked layer by layer from calipers to high-precision image measuring instruments; the surface quality is visually inspected by professionals for gloss and flatness, supplemented by quantitative inspections of gloss meters and roughness meters. Any defects cannot escape the eyes of the law. Only in this way can high-quality bicycle related accessories come out of the production line and gallop in the two-wheel world.
