For the purpose of industrial aluminum profile, it is basically used in industrial manufacturing, industrial equipment and so on.

Most industrial aluminum profiles do not have universal molds, and they are all customized according to customers. There are many post-processing technologies for industrial aluminum profiles.

First of all, the stretch bending of aluminum profile requires a certain technical process, because it is necessary to use aluminum profile stretch bending equipment to produce the required stretch bending effect. Industrial aluminum profile has a certain hardness after aging, and all cold stretch bending may lead to the deformation of the profile.

Therefore, stretch bending dies are also needed. With the development demand, many customers now need products to pursue perfection, so the equipment and technology must also cooperate with customers to have better development.

The surface treatment of industrial aluminum profiles needs special treatment, because many industrial aluminum profiles need short-piece oxidation after post-processing, because short-piece oxidation can achieve better post-treatment effect, but the investment cost is higher than that of long-piece oxidation, but compared with customers who pursue product quality, our aluminum profile manufacturers should also improve their cooperation.

This paper introduces the causes and solutions of false joints of aluminum alloy profiles.

In the production process of aluminum alloy profiles, there are often some problems such as false surface joints, surface scratches, mechanical lines, black lines on the surface, uneven surface feel, serious welds, etc. After surface treatment, aluminum alloy profiles appear black belts or serious color differences, which makes the products scrapped, causing irreparable losses.

Cause

The welding force is low because the extrusion force is too low, which is caused by both die factors and process factors. Extrusion temperature and extrusion speed of aluminum alloy profile The high temperature of aluminum bar is beneficial to the diffusion and bonding of metals, but it also leads to the aggravation of the phenomenon of metal bonding to the mold. At the same time, the high temperature leads to the accelerated growth and growth speed of metal grains, which will make the weld structure coarse.

When the extrusion speed is too high, the metal deformation work increases and the metal temperature rises greatly. In addition, if the extrusion temperature is too high, the extrusion force will be reduced, thus reducing the welding force. In fact, when graphite products is used as the discharging chute, the side contacting with graphite is also prone to black belt after oxidation.

The failure of hot extrusion die for aluminum alloy profiles is mainly caused by fracture, wear, erosion and corrosion, overheating and thermal fatigue cracks. The lubrication condition of the die has a great influence on the life of the die. In the extrusion process of aluminum and aluminum alloy materials, it is also necessary to use lubricants to reduce the friction between metal and extrusion cylinder wall, piercing needle and die surface, and to reduce the adhesion between them and the wear of dies.

In the past, due to technical factors such as the research and development of new materials, improper use of lubricants often led to surface pollution of products, and lubricants may flow into the center of products, forming a more obvious "squeezing tail".

Therefore, in the extrusion of aluminum and aluminum alloy bars and profiles, "lubrication-free extrusion" has been adopted for many years. In the extrusion of pipes and hollow aluminum alloy profiles, only the die surface and the surface of piercing needle are lubricated.

solution

In recent years, in order to extrude large and complicated hard aluminum alloy profiles on an extruder with limited extrusion force, as well as to improve the extrusion speed and obtain extruded materials with uniform microstructure and properties, countries all over the world have conducted extensive research on the lubrication extrusion method, and due to the breakthrough in the research of die structure and lubricant, the lubrication extrusion method has made great progress, and JONYE high-temperature lubricant came into being.

Especially, in view of the welding quality problems of aluminum profile during high-temperature extrusion, such as scratches on the working belt of the die, JONYE high-temperature lubricant is sprayed, which can prevent the surface of the working belt from rusting at room temperature, protect the surface of the working belt from decarburization and oxidation during a long preheating period, maintain the original hardness of the surface of the working belt, and avoid soft spots and soft belts. When aluminum profile is extruded, it can increase the lubrication with the die and reduce the friction with the die. Avoid mold block and collapse, make product production smoother, reduce welding quality problems, reduce ripple generation, improve product smoothness, prevent adhesion, avoid mold sticking and aluminum sticking, reduce mold repair times and prolong mold service time.

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