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Correction method for flatness of aluminum alloy extruded sheet | Alloy Wiki
Home » Aluminum Guide » Correction method for flatness of aluminum alloy extruded sheet
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Correction method for flatness of aluminum alloy extruded sheet

Posted by: Alloy 2021-07-15 Comments Off on Correction method for flatness of aluminum alloy extruded sheet
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By consulting related books and consulting related technical experts in the aluminum processing industry, the factors affecting the flatness problem were summarized, and based on this, a solution to the flatness problem was formulated.

use effective mold repair to improve the flatness of the product

Die repairing is the most commonly used solution for poor flatness of extruded materials at home and abroad. The advantage of this method is that it has a wide range of applications. Basically all extruded materials can be treated with this method. The disadvantage is that the production needs to be terminated. After the mold is processed, it is time-consuming and labor-intensive to test the mold again on the machine, and it is also not conducive to energy saving 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, the metal flow rate can be effectively adjusted to make the flow rate uniform and eliminate the poor plane clearance. Defects. This kind of plate generally adopts this method in the early stage of production. Some molds can solve the flatness problem at one time, and some molds require three or more times to completely solve the flatness problem. This is not only related to the mold itself, but also The skill level of the mold repair workers also has a lot to do with.

use offline finishing to correct the flatness of the product

First, according to the characteristics of the specific flatness of the sheet, the roller of the off-line finishing machine is reasonably configured, and then a product with a flatness is used for the fixed roll, and the height and position of the roller are continuously adjusted to wait for the product. After the flatness is qualified, fix the height and position of the roll sheet, and then perform offline finishing on the batch of products. Offline finishing is generally more time-consuming and laborious, and it is also easy to affect the appearance of the product to a certain extent. Figure 3 is an example diagram of the off-line finishing of the board. The flatness of the plate is convex and concave, and the flatness is out of tolerance. The rollers as shown in the figure are used. When the products pass through the rollers, the middle and edges of the products will be pressed by the rollers. Play the role of correcting the plane gap of the product.

uses online finishing to correct the flatness of the product

Considering that the order quantity is relatively large, if offline finishing is adopted, it will greatly reduce production efficiency and waste a lot of manpower. After a certain period of discussion and exploration combined with the principle of offline finishing, the concept of online finishing is proposed. And decided to make a small online finishing equipment. If it succeeds, it will not affect production efficiency but also save a lot of manpower. Figure 4 is a simplified diagram of the online finishing equipment designed for the plate. It is based on the principle of offline finishing. Bearing seats and rollers are added on the basis of the original extruder outlet guide device. By adjusting the height and height of the rollers The position to change the pressure on the product causes a certain amount of deformation of the product, so that the flatness of the product is controlled within a reasonable range, so as to achieve the purpose of online finishing.

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