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Method for controlling speed regulation of isothermal extrusion of industrial aluminum profiles for transportation

A technology of isothermal extrusion and transportation, applied in metal extrusion control equipment, metal extrusion, manufacturing tools, etc., can solve the problem of large extrusion deformation, difficult temperature gradient of aluminum rod, mesh distortion in simulation process, etc. problems, to achieve the effect of uniform performance indicators, reduced labor intensity of workers, and reduced extrusion defect rate

Inactive Publication Date: 2011-05-11
GUANGDONG XINGFA ALUMINUM
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AI Technical Summary

Problems solved by technology

In actual production, the ingot gradient heating or cooling method is generally used to achieve isothermal extrusion, but the temperature gradient of the aluminum rod required for isothermal extrusion is difficult to accurately determine through theoretical analysis, and this method requires a high degree of automation of the production line, which is difficult The expected effect is achieved; the isothermal extrusion is achieved by obtaining the isothermal extrusion speed-temperature curve through the thermal-mechanical coupling simulation of the extrusion parameters. Due to the large amount of deformation during the extrusion process, the mesh distortion during the simulation process is serious, the calculation amount is large, and the efficiency is low. Low, and often due to the lack of a large number of factory data support, the obtained isothermal extrusion curve model lacks engineering background, which limits its application in engineering

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  • Method for controlling speed regulation of isothermal extrusion of industrial aluminum profiles for transportation
  • Method for controlling speed regulation of isothermal extrusion of industrial aluminum profiles for transportation
  • Method for controlling speed regulation of isothermal extrusion of industrial aluminum profiles for transportation

Examples

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Effect test

Embodiment 1

[0027] Example 1: Isothermal extrusion of high weldability 6xxx series aluminum alloy profiles for refrigerated containers

[0028] The aluminum alloy grade is AA6061, the mold model is B1136, the overall dimensions are 340mm (width)×65mm (height)×(2.2~3.2)mm (wall thickness), and the extrusion deformation ratio is 32, such as figure 2 .

[0029] The extrusion process parameters are as follows: the temperature of the extrusion barrel is set to 420°C, the heating temperature of the aluminum rod is set to 480°C, the mold heating temperature is 460°C, and the target temperature of the extrusion outlet of the aluminum profile is 520°C.

[0030] The length of the AA6061 aluminum alloy cast rod is 1000mm, and the stroke of the extrusion rod is 900mm, which is equally divided into 600 grids, which is equivalent to 600 stroke nodes, and the interval between each stroke node is 1.5mm.

[0031]The initial (maximum) extrusion speed of AA6061-B1136 aluminum profiles for refrigerated con...

Embodiment 2

[0041] Example 2: Isothermal Extrusion of High-performance 5xxx Series Aluminum Alloy Plate Profiles with Ribs for High-speed Ships

[0042] The aluminum alloy grade is 5A30, the mold model is B2819, the overall dimensions are 280mm (width) × 55mm (height) × 4.5mm (wall thickness), and the extrusion deformation ratio is 36 ( Figure 5 ).

[0043] The extrusion process parameters are as follows: the temperature of the extrusion barrel is set to 420°C, the heating temperature of the aluminum rod is set to 450°C, the mold heating temperature is 440°C, and the target temperature of the extrusion outlet of the aluminum profile is 500°C.

[0044] The length of the 5A30 aluminum alloy casting rod is 800mm, and the stroke of the extruded rod is 700mm, which is equally divided into 350 grids and 350 stroke nodes, and the interval between each stroke node is 2mm.

[0045] The initial (maximum) extrusion speed of 5A30-B2819 aluminum profiles for high-speed ships is 2.05mm / s, which comes...

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Abstract

The invention discloses a method for controlling the speed regulation of the isothermal extrusion of industrial aluminum profiles for transportation, wherein a control system host machine, an isothermal extrusion PLC (Programmable Logic Controller) and an industrial aluminum profile outlet temperature thermodetector are used. The isothermal extrusion curves of the industrial aluminum profiles and profile outlet temperature control information are saved in the control system host machine. The method comprises the steps of: continuously monitoring and acquiring extruded profile outlet temperature by the thermodetector, importing temperature data into the isothermal extrusion PLC, issuing an extrusion speed regulation instruction by the isothermal extrusion PLC and a control system according to the detected temperature, transmitting the extrusion speed regulation instruction to an extruder PLC through the isothermal extrusion PLC, and regulating the increment / decrement of the extrusion speed of an extruder; and meanwhile, feeding back the real-time extrusion speed of the extruder to the isothermal extrusion PLC by the extruder PLC, and carrying out the processes in cycle. The method disclosed by the invention obviously improves the automation degree and production and manufacture efficiency of the extrusion production procedure of the industrial aluminum profiles and solves the technical problems of huge quality fluctuation and low production efficiency caused by controlling on the basis of manual experience for a long time.

Description

technical field [0001] The invention relates to a key technology of an extrusion process of large-scale aluminum alloy profiles for industrial use, in particular to a speed-regulating isothermal extrusion control method for industrial aluminum profiles for transportation, and belongs to the technical field of non-ferrous metal pressure processing. Background technique [0002] With the advancement of aluminum extrusion technology and the rapid development of the national economy, the application of aluminum profiles in transportation, aerospace, industrial machinery, electronic equipment and other fields has increased year by year, especially in my country's transportation industry towards lightweight, high-speed and environmental protection In the direction of globalization, transportation tools such as subways, high-speed trains, light rails, and double-decker buses gradually adopt aluminum profiles. The length of aluminum profiles for transportation is often up to 10-30m. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C31/00
Inventor 梁奕清吴锡坤
Owner GUANGDONG XINGFA ALUMINUM
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