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A production process of thin-walled and large-section hollow profiles for automotive battery pack frames

A technology for automotive batteries and hollow profiles, applied in the coating process of metal materials, etc., can solve the problems of difficult control of formability and dimensional accuracy, and achieve the effect of stabilizing mass production and optimizing mold structure

Active Publication Date: 2019-08-20
CHINA ZHONGWANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, in order to solve the problem that the formability and dimensional accuracy of thin-walled and large-section hollow profiles for automotive battery pack frames are difficult to control, the present invention provides a production process for thin-walled and large-section hollow profiles for automotive battery pack frames

Method used

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  • A production process of thin-walled and large-section hollow profiles for automotive battery pack frames
  • A production process of thin-walled and large-section hollow profiles for automotive battery pack frames

Examples

Experimental program
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Embodiment 1

[0031] A production process for a thin-walled large-section hollow profile for an automobile battery pack frame, comprising the following steps:

[0032] A. Ingredients: aluminum alloy ingots are made according to the following mass percentages:

[0033] element Si Fe Cu mn Mg Cr Zn Ti Al content 0.35 0.05 0.05 0.02 0.45 0.1 0.02 0.05 margin

[0034] Single impurity ≤ 0.05%, total impurity ≤ 0.15%;

[0035] B. Melting: put the prepared aluminum alloy raw materials in a melting furnace to melt into liquid aluminum alloy, and melt and cast the liquid aluminum alloy into aluminum alloy ingot;

[0036] C. Homogenization treatment: homogenize the aluminum alloy ingot after melting and casting;

[0037] D. Extrusion molding: Place the homogenized aluminum alloy ingot in a 20MN non-standard extruder die for uniform extrusion to obtain an aluminum alloy profile whose size and shape tolerance meet the standard requirements, wherein the alum...

Embodiment 2

[0043] The difference between embodiment 2 and embodiment 1 is that in step A, the aluminum alloy ingot is proportioned according to the following mass percentages:

[0044] element Si Fe Cu mn Mg Cr Zn Ti Al content 0.40 0.10 0.05 0.07 0.50 0.1 0.07 0.04 margin

[0045] Single impurity ≤ 0.05%, total impurity ≤ 0.15%;

Embodiment 3

[0047] The difference between Example 3 and Example 2 is that in Step D, the heating temperature of the mold is 530°C, the heating temperature of the extrusion cylinder is 460°C, the extrusion speed of the extruder is 9.0m / min, and the temperature of the head of the aluminum alloy ingot is 500°C. °C, the middle temperature is 480 °C, and the tail temperature is 460 °C.

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Abstract

The invention belongs to the technical field of aluminum alloy technologies and relates to a production process for a thin-wall large-section hollow profile for an automobile battery package framework. As for the formula, an aluminum alloy ingot comprises 0.35-0.40% of Si, 0.05-0.10% of Fe, less than or equal to 0.05% of Cu, 0.02-0.07% of Mn, 0.45-0.5% of Mg, less than or equal to 0.10% of Cr, 0.02-0.07% of Zn, less than or equal to 0.05% of Ti, less than or equal to 0.05% of a single impurity, less than or equal to 0.15% of impurities in total, and the balance Al. By selecting reasonable extrusion machines and the reasonable length of cast rods, optimizing the mold structure, adopting a reasonable mold repairing method, adjusting the cast rods, an extrusion barrel and the mold temperature, modifying the shaping and oxidation treatment modes and the like, the performance, dimension and surface of the profile for the battery package framework meet the standard requirements.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy technology, and relates to a production process of a thin-walled and large-section hollow profile for an automobile battery pack frame. Background technique [0002] With the advancement of modern science and technology and the sustained and high-speed development of the economy, especially the increasing development of the manufacturing industry and the advancement of modern processing technology, aluminum alloys have good corrosion resistance, light weight, weldability, etc., and people's interest in aluminum The deeper understanding and understanding of alloys makes the application of aluminum alloy profiles more extensive. In some structural parts, replacing steel with aluminum alloy has become a trend and necessity. And with the development of modern manufacturing and the increasing progress of science and technology. There will be more and more large section profiles. [0003] Extr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C23/02B21C37/00C22C21/08C22F1/047C23C22/66
Inventor 王义斌董晶飞黎晓王睿李延军刘丽瑜张健何强张歧宸
Owner CHINA ZHONGWANG
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