Isothermal extrusion method capable of controlling speed by sections

A technology of isothermal extrusion and subsection control, which is applied in the field of warm extrusion and can solve problems such as engineering and control operation difficulties that are not considered

Active Publication Date: 2015-04-08
CHINA NAT HEAVY MACHINERY RES INSTCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the isothermal method of extrusion speed control proposed at present does not take into account the actual operation of the project, and the actual control operation is very difficult. Therefore, an easy-to-operate speed control isothermal extrusion method is very necessary

Method used

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  • Isothermal extrusion method capable of controlling speed by sections
  • Isothermal extrusion method capable of controlling speed by sections

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The isothermal extrusion method of speed segmental control is realized by a double closed-loop control system of speed and temperature. It uses a PLC logic controller as the hardware core. The PLC logic controller is connected to the hydraulic system of the extrusion machine, and the PLC The program is programmed into the logic controller; at the same time, a displacement / speed sensor and a non-contact reflective multi-wavelength infrared thermometer are set on the extruder. Both the displacement / speed sensor and the thermometer are connected to the PLC controller, and the displacement / speed sensor It is used to detect the movement of the extruder, and the thermometer is used to detect the temperature change of the extruded die mouth.

[0019] Such as figure 1 As shown, the specific implementation steps of this isothermal extrusion method with segmental speed control are as follows:

[0020] Step 1, the segmental curve of the moving speed of the extrusion rod during th...

Embodiment 2

[0025] The following is an example of an aluminum alloy product produced by a long-stroke forward aluminum extrusion machine.

[0026] Such as figure 1 As shown, the specific implementation steps of the isothermal extrusion method of this speed segmental control are as follows:

[0027] Step 1, simulate the segmental curve of the extrusion rod speed in the extrusion process; from the numerical simulation of the extrusion stroke and the extrusion rod moving speed, the extrusion rod moving speed increases along the extrusion stroke and decreases stepwise. Pressure velocity segment curve.

[0028] Such as figure 2 As shown, the segmentation curve of the moving speed of the whole extrusion rod is stepped, and presents a trend that the moving speed of the extrusion rod decreases with the increase of the extrusion stroke.

[0029] Specifically, the moving speed curve of the extrusion rod is divided into 6 sections within the extrusion stroke of 0-850mm, which are 10mm / s within 0...

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Abstract

The invention relates to the technical field of metallurgy, provides an isothermal extrusion method in an aluminum extruder extruding process, and particularly relates to an isothermal extrusion method capable of controlling the speed by sections. According to the isothermal extrusion method, a PLC (Programmable Logic Controller) is taken as a hardware core; the PLC and a hydraulic system of an extruder are conducted; and a program is programmed into the PLC. The isothermal extrusion method capable of controlling the speed by sections is characterized by being implemented by four steps of inputting the PLC according to a simulated extrusion rod movement speed subsection curve and an extrusion rod movement speed subsection curve, detecting in real time and adjusting in real time. According to the isothermal extrusion method capable of controlling the speeds by sections disclosed by the invention, along the increasing of an extruding route, a manner of gradually reducing the movement speed of an extrusion rod by sections is adopted and an extruded mould is detected; and the method is suitable for actual operation of engineering and can realize an isothermal extrusion process of aluminum and aluminum alloys.

Description

technical field [0001] The invention relates to the technical field of metallurgy, and relates to an isothermal extrusion method in the extrusion process of an aluminum extrusion machine, in particular to an isothermal extrusion method with segmental speed control. Background technique [0002] At present, the isothermal extrusion method of the aluminum extrusion machine usually has two implementation methods, one is the method of controlling the temperature of the extrusion cylinder, and the other is the method of controlling the extrusion speed curve. However, in the method of controlling the temperature of the extrusion cylinder, because the temperature control itself has a large hysteresis, it is difficult to achieve isothermal control. The extrusion speed curve control method is to control the extrusion speed, which is relatively easy to realize. However, the isothermal method of extrusion speed control proposed at present does not take into account the actual operatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C31/00B21C23/00
Inventor 张君高红章侯永超辛宏斌周少凡黄胜
Owner CHINA NAT HEAVY MACHINERY RES INSTCO
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