High-strength aluminum alloy seamless tube extrusion process method and device

A process method, aluminum alloy technology, applied in the direction of metal extrusion, metal extrusion control equipment, metal processing equipment, etc., can solve the problems of easy scratches, low yield of extruded seamless pipes, and extrusion temperature affecting the surface of pipes Quality and production efficiency and other issues, to achieve the effect of convenient direct processing and avoid material overflow

Pending Publication Date: 2022-03-22
福建祥鑫新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the extrusion of hollow ingots has defects such as extrusion eccentricity and easy scratches on the inner surface, which lead to serious defects such as low yield of extruded seamless pipes and poor dimensions.
At the same time, the extrusion temperature directly affects the surface quality and production efficiency of the pipe. If the temperature is too low, it may cause stuffiness and low production efficiency. When the temperature is high, the surface of the pipe is prone to cracks or peeling.
[0003] Therefore, how to improve the production technology of aluminum alloy seamless pipe, so that it can ensure the eccentricity of the pipe and the quality of the inner and outer surfaces, improve the yield, and reduce the production cost. Production

Method used

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  • High-strength aluminum alloy seamless tube extrusion process method and device
  • High-strength aluminum alloy seamless tube extrusion process method and device
  • High-strength aluminum alloy seamless tube extrusion process method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Such as figure 1 As shown, a high-strength aluminum alloy seamless pipe extrusion process, the specific steps are as follows:

[0048] Step 1. Billet heating: place the high-strength aluminum alloy billet in the induction heating furnace, heat the billet gradiently, heat the middle part of the ingot to the design temperature, the design temperature is 440 ° C, and heat the head of the ingot to the design temperature The temperature is 15°C higher, and the tail of the ingot is heated to 15°C lower than the design temperature. After heating, heat preservation treatment is carried out to make the temperature of the inside and outside of the billet consistent;

[0049] Step 2. Mold heating: Preheat the extrusion barrel of the extruder to 20°C lower than the design temperature of the ingot; place the mold in a mold heating furnace and heat it to 440°C, and then heat the extrusion needle and extrusion shaft to 420°C;

[0050] Step 3, mold loading and feeding: place the mold...

Embodiment 2

[0054] Such as figure 1 As shown, a high-strength aluminum alloy seamless pipe extrusion process, the specific steps are as follows:

[0055] Step 1. Billet heating: place the high-strength aluminum alloy billet in the induction heating furnace, heat the billet gradiently, heat the middle part of the ingot to the design temperature, the design temperature is 450 ° C, and heat the head of the ingot to the design temperature The temperature is 15°C higher, and the tail of the ingot is heated to 15°C lower than the design temperature. After heating, heat preservation treatment is carried out to make the temperature of the inside and outside of the billet consistent;

[0056] Step 2. Mold heating: Preheat the extrusion barrel of the extruder to 150°C lower than the design temperature of the ingot; place the mold in a mold heating furnace and heat it to 480°C, and then heat the extrusion needle and extrusion shaft to 450°C;

[0057] Step 3, mold loading and feeding: place the mol...

Embodiment 3

[0062] Embodiment 3 is a further improvement to Embodiment 1.

[0063] Such as figure 2 , 3 , 4, 5, 6, 7, 8, 9, 10 and 11, a device for a high-strength aluminum alloy seamless pipe extrusion process, the device is a pressing machine in step 1, including an extrusion seat 1, A second horizontal groove 29 is opened in the extrusion seat 1, and a second spiral electromagnetic heater 30 for heating is installed in the second horizontal groove 29, and an extrusion cylinder 5 is fixedly installed in the extrusion seat 1 in the second horizontal groove 29. , the inner wall of the second spiral electromagnetic heater 30 is in contact with the outer wall of the second transverse groove 29, the ingot is placed in the extrusion cylinder 5, and the heated extrusion cylinder 5 is beneficial to keep the ingot at the set temperature;

[0064] The extrusion seat 1 is fixed with a straight plate 32 on the side wall of the extrusion end of the extrusion barrel 5, and the top of the straight ...

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Abstract

The invention discloses a high-strength aluminum alloy seamless tube extrusion process method and device, and relates to the technical field of aluminum alloy tubes, the high-strength aluminum alloy seamless tube extrusion process method specifically comprises the following steps: bar billet heating: placing a high-strength aluminum alloy bar billet in an induction heating furnace, and carrying out gradient heating on the bar billet, the middle of the cast ingot is heated to the designed temperature of 440-450 DEG C, the head of the cast ingot is heated to 15 DEG C higher than the designed temperature, the tail of the cast ingot is heated to 15 DEG C lower than the designed temperature, heat preservation treatment is conducted after heating, and the internal temperature and the external temperature of a bar blank are consistent; the clearance between the casting rod and the extrusion cylinder is 1-3mm, and the clearance between the inner diameter of the casting rod and the extrusion needle is 1-2mm, so that the wall thickness deviation of the high-strength aluminum alloy seamless tube can reach +/-3%, meanwhile, the extrusion shaft and the extrusion needle can be conveniently heated, additional heating treatment is not needed, and enterprise production is facilitated.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy pipes, in particular to a high-strength aluminum alloy seamless pipe extrusion process method and device. Background technique [0002] At present, in the production of medium and high-strength aluminum alloy seamless pipes, the method of hollow ingot extrusion is usually used, especially for high-strength aluminum alloys, because of its large deformation resistance, hollow ingot extrusion must be used, and the ingot must be controlled The length of the needle prevents the needle from being squeezed and stuffy or broken. However, the extrusion of hollow ingots has the defects of eccentric extrusion and easy scratching of the inner surface, which leads to serious defects such as low yield of extruded seamless pipes and poor dimensions. At the same time, the extrusion temperature directly affects the surface quality and production efficiency of the pipe. If the temperature is too low, it may...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C23/00B21C23/20B21C29/04B21C31/00B21C35/02B21C35/04
CPCB21C23/002B21C23/205B21C29/04B21C35/04B21C35/02B21C31/00
Inventor 池海涛黄祯荣冯永平刘馥兵张建雷
Owner 福建祥鑫新材料科技有限公司
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