Kemet Share | Extrusion Industrial Aluminum Operating Procedures and Precautions

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1. Industrial aluminum alloy profile is an alloy material with aluminum as the main component. Aluminum rods are hot-melted and extruded to obtain aluminum materials with different cross-sectional shapes, but the proportion of added alloys is different, and the industrial aluminum profiles produced The mechanical properties and application fields are also different.

1. definition of industrial aluminum

1, industrial aluminum alloy profile, is a kind of aluminum as the main component of the alloy material, aluminum rod through hot melt, extrusion to obtain different cross-sectional shapes of aluminum materials, but the proportion of the added alloy is different, the mechanical properties and application fields of the industrial aluminum profile produced are also different. Generally speaking, industrial aluminum profiles refer to all aluminum profiles except aluminum profiles for building doors and windows, curtain walls, indoor and outdoor decoration and building structures.

2. Extrusion Industrial Aluminum Material Pay Attention to Operating Rules and Precautions

The most important problem in extrusion is the control of metal temperature. From ingot heating to quenching of extruded profile, it is necessary to ensure that soluble phase structure does not precipitate from solid solution or disperse and precipitate small particles. The ingot heating temperature is generally set in the temperature range of Mg2Si precipitation, the heating time has an important influence on the precipitation of Mg2Si, the use of rapid heating can greatly reduce the possible precipitation time. The extrusion temperature is adjusted according to different products and unit pressure during operation. The

(I) is analyzed from the process first:

1. Before opening the aluminum extruder, it is necessary to ensure that there are no sundries and oil stains around the equipment and on the machine.
2. Prepare the raw materials according to the production requirements and pour them into the trough according to the ratio requirements.
3. Check the power supply and confirm that each control cabinet works normally.
Main machine of (II) industrial aluminum profile extrusion machine:
. The transmission and extrusion system is completed by controlling the variable frequency speed regulating motor by the main frequency converter, which is transmitted to the screw step by step through the reduction gearbox distribution box and cross spline. The program and parameter values input in the frequency converter have been set and completed when the equipment leaves the factory and cannot be changed at will.
2. The heating and cooling system is composed of barrel heating and cooling, die head heating and screw core heating and cooling. It is controlled by electric cavity program. The B & R temperature module is equipped with PID temperature control software to replace the traditional temperature control meter. The system can automatically optimize and calculate PID parameters during heating, and automatically assign values after calculation is completed, you can also manually assign values to PID parameters based on your own experience, and the temperature control is accurate to ± °C.

3. The automatic feeding system is controlled by a time relay or a material level gauge to transmit signals. When there is a shortage of materials, the material level gauge transmits signals, and the system starts feeding. When the material is full, the signal of the material level gauge is interrupted and the feeding stops.

4. The feeding system is also realized by the frequency converter controlling the frequency conversion speed regulating cycloidal pin wheel reducer. The proportion is adjusted according to the rotating speed of the main engine screw. The current and torque of the main engine are directly affected by the feeding amount, and the feeding amount is less, and the current and torque of the main engine are reduced. On the contrary, it increases. When the feeding is too much, the actual current exceeds its rated current or torque exceeds its set value, the host will overload alarm shutdown, generally controlled at 50% to 80% of the rated value.

5. The vacuum exhaust system is directly controlled by the button to complete the vacuum pump. When the vacuum is opened, the solenoid valve is opened, and when it is closed, the solenoid valve is closed.

(III) Industrial Aluminum Extruder Operating Rules:

1. Check whether the oil pressure system leaks oil and whether the air pressure is normal.

2. Check whether the transmission belt, cooling bed and storage table are damaged or scratched.

3. Confirm the length of the aluminum profile before stretching, and then predetermine the stretching rate to determine the stretching length, that is, the moving position of the main chuck.

4. Confirm the clamping method according to the shape of the aluminum profile. For large-section hollow profiles, stretch pads can be plugged, but try to ensure sufficient clamping area.

5. When the aluminum profile is cooled to below 50 ℃, the profile can be stretched.

6. When the profile is bent and twisted at the same time, the twisted shall be corrected first and then bent.

7, the first and second test pull, and confirm whether the predetermined stretching rate and clamping method are appropriate. Visually bend, twist, check the plane clearance, flaring, and parallel of the profile. If it is not suitable, adjust the stretching rate appropriately.

8. When the normal stretching rate still cannot eliminate bending, twisting, or the geometric size cannot be qualified, the operator shall be notified to stop squeezing.

9. The profiles on the cooling table cannot rub against each other, collide, overlap and stack to prevent wiping. The working efficiency and service life of

industrial aluminum extruder have a great relationship with the installation sequence of industrial aluminum extruder. The equipment foundation of general industrial aluminum extruder should not only bear the weight of the equipment itself and the weight of raw materials for production, but also bear the dynamic load of the industrial extruder. Therefore, the equipment installation must be carried out according to the corresponding installation procedures.