In the honeycomb panel production process, the upstream processes of smelting, casting, milling, homogenization, hot rolling, cold rolling and other processes are basically the same as the production process of ordinary plates, except that the purification of the melt should be more refined. During hot rolling and cold rolling, more attention should be paid to the surface quality of the strip. Each step of the downstream process is crucial, and some are unique, such as pre-aging treatment (T4P) and passivation treatment, dry and wet lubricant application, etc. Required include: precision cutting line, air cushion furnace heat treatment production line, batch controlled atmosphere or vacuum heat treatment furnace or induction heating automatic heat treatment production line, surface treatment production line, lubricant coating line, stretch bending or pure stretch straightening line, etc., which are different from ordinary Aluminum alloy plates and strips. Honeycomb panel strip.
The process flow can be a continuous production line located at different elevations, or it can be divided into upper and lower layers, or it can be divided into two or three independent production lines, such as uncoiling, live storage, heat treatment (solid solution treatment, water quenching, Air quenching, annealing treatment can also be carried out), pre-aging treatment and coiling into one line; uncoiling, surface treatment (water washing, alkali washing, acid, water washing, conversion film treatment), tension bending and straightening, dry and wet lubricant application, exit side Looper storage and coiling are another production line; uncoiling, cross-cutting, palletizing, and packaging are another production line.
The heat treatment furnace must be of air cushion type and can be used for annealing or solution treatment. The maximum temperature should be able to reach 600°C, and the temperature should be precisely controlled. The so-called pre-aging treatment of T4 state, the state code is T4P, means that the strip temperature cannot drop to room temperature during quenching, and must be coiled in a warm state, that is, coiled under temperature control. T4P material is quite stable and soft. Has good formability. The honeycomb panel and strip production line is relatively long. To build a continuous flow production line, it must be a large enterprise with a production capacity of ≥120,000 tons/year.
