Aluminium frame to create a popular lightweight bicycle

     Most importantly, the aluminum frame plays an important role in the entire bicycle. A lightweight, strong and flexible frame is the standard for measuring whether a bicycle is accepted by the market. Industrial aluminum plays a vital role in the frame. The role of. Recently, the editor came to the domestic industrial park of an international brand of bicycles and visited the aluminum bicycles manufactured by industrial aluminum tubes to understand the important position of aluminum in bicycle countries from another perspective .


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      Entering the factory, through the introduction of the engineer, the editor learned that an aluminum bicycle needs to go through multiple steps from aluminum alloy pipes to finished cars, which can basically be divided into pipe cutting---->saponification---- >Piping---->Annealing---->Dura Film---->Bend Pipe---->Punching---->Milling Arc---->Pickling---->Welding ---->T4/T6 heat treatment---->calibration---->spraying---->assembly.



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       In the aluminum alloy frame processing workshop, aluminum pipes can be seen everywhere in the door, and these aluminum pipes have been cut to size. The sound of the machine colliding with the aluminum material is very noisy, and the workers in the processing area are still dealing with the work at hand professionally.



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       Immediately after the aluminum tube undergoes a saponification reaction , the saponification is mainly to form a solid lubricating layer on the surface of the aluminum alloy, improve the fluidity of the material, and reduce the friction with the mold during the subsequent processing.



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       The assembly line forms various types of aluminum tubes according to the requirements of the vehicle model, including bending, partial flattening to form special-shaped tubes, etc., are all carried out in this area (there are also the pipe-drawing (double-drawing, double-drawing, double-drawing, etc.) that most manufacturers often emphasize during product promotion. Three draws) are also carried out here).


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       What is displayed in the window is the complete picture of the different parts of the different models of the tube after processing, and it is also the best way to display the working standards, and the management is convenient and the display effect is straightforward.



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The gauges for each part of the frame are placed on the shelf, and the workshop management is clear at a glance whether the product meets the standard.



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Then, the aluminum tube undergoes preliminary processing, namely, the punching of the head tube.



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Another process is to bend the aluminum pipe into different shapes, and one end needs to be milled into a suitable shape before it can be smoothly combined with other parts to form a frame.



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Then enter the next process-welding. The welding process imitates the Ford model, each welder is simple to operate, it may be just a connection to the wire seat. Decompose the welding of a frame into N multi-step small operations. As long as everyone completes their own responsibility according to the standard, they can finally ensure that the product meets the standard. The standards for workers can also be greatly reduced, and it is only necessary to set up senior welders in key positions to ensure the production rate and efficiency.



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Combination of frame head tube and top tube. The welding method also chooses various methods such as argon welding or small welding because of the different positions.



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For delta welding on the rear of the frame, the amount of the welding rod held by the welder’s left hand is calculated each time, and the welder must strictly follow the amount of material used. This not only involves cost issues, but also affects the effect of the finished product. The future development trend of aluminum alloy frames is still further lightweight, and in terms of processing, it is necessary to further realize automatic processing and welding.



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Frames that have completed preliminary welding line up to wait for heat treatment, first for T4 and then for T6.



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After the heat treatment, pickling should be carried out to remove the surface dirt and correction before entering the spraying line. The calibration process includes the comparison of details and parameters such as cap pull, hook claw, and center degree.



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The next process is spraying. An aluminum alloy frame in the spraying workshop must go through at least 4 sprays and 5 bakes before it can enter the next process. Special models will also increase the number of spraying and baking paints. After painting, there will be another layer on the surface. Golden oil, shiny or matte depends on it. 



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The aluminum tube frame is processed to the final step-labeling. At the end of the labeling line is another quality inspection room, which is responsible for product inspection and repair functions.



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The aluminum alloy frame factory not only produces and processes frames, but also assembles them into bicycles. For this reason, we have also seen a fairly complete bicycle processing line.



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When the frame that flows down from the painting line comes to the assembly area, the worker will put on the upper and lower pipes and put on the brake line and the shift line, and then the assembly line will be pushed forward step by step to install the chainring, rear derailleur, handlebar group, and wheel. Group, a car is basically formed. In the wheel assembly line parallel to the assembly line, manual assistance machines complete the steps of installing spokes, adjusting rings, and installing flywheels. Prepare instructions and some small accessories in the packing box, and a complete vehicle is basically completed.



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Finally, it is packed into storage, and then transported to the warehouses of branches across the country to join the bicycle army of our country and the world.



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