Correction method of flatness of aluminum alloy extruded plate

1 Use effective mold modification to improve the flatness of the product

Mold repair is the most commonly used solution for poor flatness of extrusion materials at home and abroad, the advantage of this method is a wide range of applications, basically all extrusion materials can use this treatment method, its disadvantage is that production needs to be terminated, and the mold is processed after the mold is processed and then put on the machine to try the mold again, which is time-consuming, labor-intensive, and not conducive to energy conservation and consumption reduction. The poor plane clearance of the plate is mainly related to the uneven flow rate of the mold, by changing the size or angle of the diversion pit, or changing the length of the working belt to effectively adjust the metal flow rate, so that the flow rate is uniform and the defect of poor plane clearance is eliminated. This type of plate generally adopts this method in the early stage of production, some molds can solve the flatness problem once the mold can be repaired, and some molds need three or more times to completely solve the flatness problem, which is not only related to the mold itself, but also has a great relationship with the technical level of the mold repair workers.

2 Use offline finishing to correct the flatness of the product

First, according to the characteristics of the specific flatness of the plate, the roller plate of the offline finishing machine is reasonably configured, and then a flatness product is used to fix the roller, by constantly adjusting the height and position of the roller, after the flatness of the product is qualified, the height and position of the roller plate are fixed, and then the batch of products is finished offline. Offline finishing is generally more time-consuming and labor-intensive, and it is also easy to have a certain impact on the appearance of the product. An example diagram of the offline finishing of the plate. The flatness of the plate is convex and concave, and the flatness is excessive, using the roller as shown in the figure, the middle and edge of the product will be under a certain pressure on the roller plate in the process of passing through the roller, so as to correct the plane gap of the product.

3 Use online finishing to correct the flatness of the product

Considering that the number of orders is relatively large, if offline finishing is adopted, it will greatly reduce production efficiency and waste a lot of manpower, through a certain period of discussion and exploration and combined with the principle of offline finishing, the concept of online finishing is proposed, and it is decided to make a small equipment for online finishing, if successful, it will not affect the production efficiency and save a lot of manpower. It is a simplified drawing of the online finishing equipment designed for the plate, which is based on the principle of offline finishing, on the basis of the original extruder outlet guide device, the bearing seat and roller plate are added, and the height and position of the roller plate are adjusted to change the size of the pressure on the product to make the product deform a certain amount, so that the flatness of the product can be controlled within a reasonable range, so as to achieve the purpose of online finishing.