Die repair of aluminum extrusion die is the most commonly used method to solve the poor flatness of aluminum alloy extrusion materials at home and abroad. The advantage of this method is that it has a wide range of applications and can be used for almost all aluminum all-gold extruded profiles. Its disadvantage is that the production needs to be terminated, and it is time-consuming and laborious to try the die on the machine after the aluminum extrusion die is processed, which is also not conducive to energy saving and consumption reduction.

The difference of plate plane clearance is mainly related to the uneven velocity of die. By changing the size or angle of the diversion pit or the length of the working area, the metal flow rate can be effectively adjusted to make the flow rate uniform and eliminate the defect of poor plane gap. This method is generally used in the early production of this aluminum alloy plate. Some aluminum extrusion dies can solve the flatness problem once, and some dies need three or more times to completely solve the flatness problem, which is not only related to the die itself, but also related to the technical level of die repairers.

Firstly, according to the specific out-of-tolerance flatness characteristics of aluminum alloy sheet, the rollers of off-line finishing mill are reasonably configured, and then the rollers are fixed with products with out-of-tolerance flatness. By constantly adjusting the height and position of the roller, the height and position of the roller are fixed after the flatness of the product is qualified, and then the batch of products is completed off-line. Off-line finishing is generally time-consuming and laborious, and it is easy to affect the appearance of products.

The flatness of the plate is convex and concave, and the flatness is out of tolerance. When the product passes through the roller, the middle and edge of the product will be pressed by the roller to correct the plane gap of the product.

Considering that the order volume of this aluminum material is relatively large, if off-line finishing is adopted, the production efficiency will be greatly reduced and a lot of manpower will be wasted. After a certain period of discussion and exploration, combined with the principle of off-line finishing, the concept of on-line finishing is put forward, and it is decided to make a small equipment for on-line finishing. If successful, it will not affect production efficiency and save a lot of manpower. According to the principle of off-line finishing, the sketch of on-line finishing equipment designed for this plate is to add bearing seat and roller on the basis of outlet guide device of primary aluminum extruder. By adjusting the height and position of the roller and changing the pressure on the product, the product is deformed to a certain extent, so that the flatness of the aluminum profile product is controlled within a reasonable range, and the purpose of online finishing of the aluminum profile is achieved.