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Aluminum alloy and fastener member

A technology for fastening parts and aluminum alloys, applied in the direction of threaded fasteners, connecting components, screws, etc., can solve problems such as lightweight obstacles, and achieve the effect of excellent strength and toughness

Pending Publication Date: 2018-10-23
NHK SPRING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the length of the shaft portion of the steel bolt affects the wall thickness of the part, and the diameter of the steel bolt affects the width of the flange part of the part where the threaded hole is provided. When using steel bolts for parts made of magnesium alloys or magnesium alloys, this becomes an obstacle in the pursuit of weight reduction

Method used

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  • Aluminum alloy and fastener member
  • Aluminum alloy and fastener member
  • Aluminum alloy and fastener member

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0024] figure 1 It is a side elevational view showing the structure of the fastening member according to the first embodiment of the present invention. figure 1 The fastening member 1 shown is a bolt (one outer threaded member) made of an aluminum (Al) alloy. The fastening member 1 includes a shaft portion 2 having a cylindrical shape; a head 3, which is disposed in the axial direction of the shaft portion 2 ( figure 1 One end of the left and right direction; and the neck 4 constitute the boundary between the shaft portion 2 and the head 3. The shaft portion 2 has a threaded portion 22 which is formed with a threaded teeth 21. Further, the shape (hex head type) of the head 3 is simply one example, or other shapes (hexa-angle type, flat head type, flat head type, flat head type, flat top cylindrical head type, etc.).

[0025] The fastening member 1 is made of an aluminum alloy containing silicon (Si), copper (Cu), manganese (Mn), magnesium (Mg) and zinc (Zn), and the margin is fro...

Embodiment approach 2

[0038] figure 2 It is a top plan view showing the structure of the fastening member according to the second embodiment of the present invention. figure 2 The fastening member 5 shown is a nut (one of the internal threaded components) made of the above aluminum alloy. The fastening member 5 is present in a hollow cylindrical shape, and a thread 52 is formed in the inner surface of the aperture 51 formed in the central portion. in addition, figure 2 The shape (hex nut) of the fastening member 5 is only an example, and it is also possible to be implemented as a nut (flange nut, cover nut, long nut, etc.) having other shapes.

[0039] The fastening member 5 is carried out, which is formed using the above aluminum alloy. The fastening member 5 is formed by brushed molding by a rod-shaped member made of the aluminum alloy, a core tubing process and a cold head processing or the like.

[0040] According to the first embodiment of the present invention described above, by using Si contai...

Embodiment approach 3

[0042] image 3 It is a side view showing the structure of the fastening member according to the third embodiment of the present invention. image 3 The fastening member 6 is a rivet made of the above aluminum alloy. The fastening member 6 includes: the shaft portion 7, which is cylindrical; head 8, which is disposed at the height direction of the cylinder constituting the shaft portion 7 ( image 3 One end of the left and right direction; and the neck 9 constitute the boundary between the shaft portion 7 and the head 8. in addition, image 3 The shape (round head type) of the head 8 shown is not only one example, with other shapes (flat head type, etc.).

[0043] The fastening member 6 can be formed by bridging processing and cold heading processing by a rod member made of the above aluminum alloy.

[0044] According to the first embodiment of the present invention described above, by using Si containing 0.7% or more, 0.5% or more of 2.8% or less Mn, 0.6% or more 1.6% Mg and 0.1. % ...

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Abstract

An aluminum alloy according to the present invention includes, by mass ratio, 0.7-1.8% of silicon, 0.5-2.1% of copper, 0.4-1.8% of manganese, 0.6-1.6% of magnesium, and 0.1-0.7% of zinc, the balance being aluminum and unavoidable impurities.

Description

Technical field [0001] The present invention relates to an aluminum alloy, and a fastening member made of the aluminum alloy. Background technique [0002] In the past, as a method for achieving improvement in the fuel consumption of the car, it is committed to light weight of various components. For example, as a material of the engine cylinder, an aluminum alloy is used instead of cast iron, or as a material of the engine cover and the oil bottom shell, the case of using a magnesium alloy in replacing steel, gradually increases. [0003] In the case where the components made of the aluminum alloy or the magnesium alloy are fastened to each other by the conventional steel bolt, the difference between the linear expansion coefficient of the aluminum alloy or the magnesium alloy is large, It is prone to relaxation, and corrosion is also easily due to the contact of the xenograft. Therefore, in order to sufficiently ensure the reliability of the fastening link, the threaded holes o...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22C21/06F16B35/00F16B37/00F16B19/06C22F1/05
CPCC22C21/02C22C21/06F16B19/06F16B35/00F16B37/00C22C21/12C22F1/04C22C21/00C22C21/14C22C21/16C22C21/18C22F1/043C22F1/057
Inventor 金田教良铃木健宫本浩平堀内直树
Owner NHK SPRING CO LTD
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