Industrial aluminium profile is mostly according to user's existing demand to develop, some industry development ability is strong, such as rail vehicle manufacturing, automobile manufacturing, etc., but some small industry lack self development ability, or not realize industrial aluminum instead of active materials are available, and this requires enterprises to help users to develop alternative industrial aluminium profile, to do this, Will need to go out to make detailed research material, from all walks of life to find a suitable for aluminum material to replace, through the development, can enlarge the market of industrial aluminum demand, especially in big industrial development, increase the market demand can reduce construction of large and super large extrusion line after the completion of the situation facing the fierce competition. Improve the overall production technology of industrial aluminum profiles. Most industrial aluminum type of material, performance, size tolerance and so on all has the strict request, although industrial aluminum profits than architectural aluminum is high, but its production is also relatively large, difficult technical requirements are higher, especially complex wide flat thin wall of large industrial aluminum production technology, with the foreign and the larger gap.

1. Selection of raw materials

The industrial aluminum profile is an industrial frame profile which is heated by the aluminum bar and extruded by the mold, and the aluminum bar is formed by the aluminum ingot after melting and casting, which is called the industrial aluminum profile raw material; The raw materials will directly affect the performance of industrial aluminum profile products.

The production of aluminum bar needs high technical requirements and industry standards to ensure the product performance of industrial aluminum profiles; Aluminum rod casting production should pay attention to the following points:

① : the content of active impurities;

② : alloy composition;

(3) : melt overheating temperature;

(4) : diversion mode;

⑤ : melt relative crystallization surface movement;

⑥ : cooling speed;

⑦ : casting 6063 aluminum bar speed;

2. Aluminum rod heating:

The heating treatment of aluminum bar should ensure the control of temperature, extrusion outlet temperature, online quenching temperature and so on.

3. Mold design:

The industrial aluminum profile is the final product of the aluminum bar after heating through the mold extrusion molding, and the mold is designed according to the demand with high precision specifications of the appliance, used to extrude the required specifications and section of the profile products; The design and maintenance of the mold should pay attention to the following points:

(1) : the structure involved in the mold should meet the production needs, but also meet the physical and mechanical common sense, to ensure that the production of products can achieve the performance of the use.

(2) : The material selection and hardness of the mold should be appropriate to avoid deformation, scratches and other hard injuries in the extrusion process, which will affect the quality of the final product.

(3) : To often clean up the mold inspection, there are problems to be repaired in time, to avoid scratches, burrs and other hard injuries in the production process of profile extrusion, seriously affect the quality of industrial aluminum profile products.

4. Industrial aluminum extrusion

At present, 6063-T5 industrial aluminum extrusion machine standard used in 1300 tons - 1600 tons, the above standard can meet the normal production of 6063-T5 series of industrial aluminum.

Industrial aluminum extrusion process attention factors:

(1) Temperature control: for extrusion production, extrusion temperature is the most basic and the most critical process factor. Extrusion temperature has great influence on product quality, production efficiency, die life and energy consumption.

(2) extrusion speed: the extrusion speed must be carefully controlled during the extrusion process. Extrusion speed has an important effect on deformation thermal effect, deformation uniformity, recrystallization and solution process, mechanical properties and surface quality of products.

③ On-machine quenching: 6063-T5 quenching is to keep the Mg2Si solvently dissolved in the matrix metal at high temperature out of the die hole after rapid cooling to room temperature. The cooling rate is always proportional to the content of strengthening phase. 6063 alloy can be strengthened at a minimum cooling rate of 38℃/ min, so it is suitable for air cooling quenching. The cooling strength can be changed by changing the rotation of the fan and fan, so that the temperature of the product can be reduced to below 60℃ before tension straightening.

5. Straightening correction of industrial aluminum profiles

Industrial aluminum extrusion molding will have a certain deviation, after forming to use the straightening machine straightening correction, the industrial aluminum extrusion molding correction to the required tolerance range, straightening correction must be used to complete the straightening machine, to ensure its accuracy.

6. Artificial aging

Extrusion produced aluminum profile, without aging before the hardness is low, can not be used as a finished product, therefore, generally speaking, must be aging to improve the strength.

Production process control:

(1) : ingot temperature control: the temperature of the ingot should be measured before extrusion, and the production can be carried out after meeting the technological requirements.

② : online quenching process: solution quenching is the basic premise of aging, there is no sense without solution quenching aging. Therefore, the online quenching process (air quenching, air-fog quenching, water quenching, etc.) should be selected according to the ingot brand, profile wall thickness, extrusion speed and quenching equipment condition at the discharge port of the extruder to ensure that the quenching cooling speed meets the quenching sensitivity requirements of the alloy.

(3) : aging furnace temperature setting and control: usually, aging furnace temperature and aging furnace surface temperature there is a certain error, set the table temperature according to the actual temperature of the furnace to set, and pay close attention to the aging furnace temperature fluctuations.

(4) : aging insulation: to carry out aging in strict accordance with the requirements of the process, the insulation time should be appropriate to prevent the aging or over-aging and lead to insufficient hardness.

Billet framing and furnace loading:

(1) : extrusion frame can not be too dense, there should be an interval between the material and the material, especially the unventilated small material and thick material interval should be more large, pipe material and small material, plate material together in a frame, pipe material is put below so that it is conducive to aging circulation air supply.

(2) : before loading the furnace to separate the 6063 special alloy and ordinary 6063 alloy loading aging, because of production reasons really with the furnace aging, to use the special alloy process to aging.

7. Sandblasting + oxidation process

After industrial aluminum extrusion, surface will have significant stretch lines, and the surface pores, relatively rough, must through sandblasting processing, use of silicon carbide in the process of sand blasting impact will cause the aluminum surface structure change, accompanied by crystal slip occurred plastic deformation process, lead to the increase of dislocation density within the subgrain, material surface more smooth.

Industrial aluminum profile surface treatment through the following steps:

(1) : surface sandblasting treatment;

② : surface pretreatment;

(3) : industrial aluminum degreasing process;

(4) : industrial aluminum profile etching process;

⑤ : industrial aluminum profile alkaline corrosion process;

⑥ : neutralization process;

⑦ : industrial aluminum profile oxidation process;

⑧ : industrial aluminum sealing process;

At present, many industrial aluminum profiles on the market in order to reduce the cost, reduce the industrial aluminum surface oxidation process, directly using silver white oxidation treatment, the surface is bright silver, coating between 5μ-6μ is far less than the industry standard (industry standard coating 10μ-12μ).

Packaging 8.

Because the quality requirements of industrial aluminum profile products are very high and the overall appearance is very exquisite, the packaging requirements are very strict in the later stage. The overall packaging process is divided into the following categories:

(1) : profile surface film, avoid scratches.

② : pearl cotton package;

(3) : wrap the outer layer with a layer of kraft paper to avoid rubbing hard objects;

9. Aging frame operation requirements for industrial aluminum profiles

1. When hoisting material into the furnace, the aluminum profile end and air guide shall be controlled within 80 ~ 100mm.

2. Heat insulation curtain wall aluminum profiles, hot window profiles, must be aging in a aging furnace, the temperature in the furnace is contained in 180℃±3℃ scale, after reaching the temperature insulation for 3 hours out of the oven, out of the oven immediately open the fan blowing for 20 minutes cooling, quality inspector inspection hardness;

3. Heat insulation profiles and ordinary profiles are not allowed to be mixed in the counter frame.

4. Thermal insulation curtain wall aluminum profiles, isolation window profiles, must be divided and installed in the rival frame.

5. For small materials with wall thickness ≥2mm, 80mm air ducts must be left at both ends of each frame.

6. If the aging heat insulation profile does not like the furnace, about 1 ~ 2 frames of mediocre profiles (wall thickness in the following 2.0mm) with the furnace aging, aging bottom according to the heat insulation profile singing experiment.

7. Ordinary curtain wall profiles, ordinary door and window profiles, home-made profiles, must be aging in a aging furnace, the temperature in the furnace is within 195℃±5℃ range, reach the temperature after heat preservation 3 hours out of the oven, after the oven immediately turn on the fan for 20 minutes to cool, the quality inspector test hardness.

8. Flat die materials with wall thickness ≥4mm are not allowed to be stacked (only one die per layer is allowed).

9. When the temperature in the furnace reaches the required temperature for singing, the aging worker shall measure the practical temperature in the furnace with a glass tube thermometer every 30 minutes and make original records.

10. Ordinary curtain wall aluminum profiles, ordinary door and window profiles, building profiles, must be separately installed in the counterbalance frame.