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Joint and automotive seat frame

A joint body and component technology, applied in the direction of seat frame, vehicle seat, thin plate connection, etc., can solve the problem that it is difficult to obtain product strength

Active Publication Date: 2020-06-30
NHK SPRING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aluminum-based materials are suitable for lightweight, but if aluminum-based materials are used, it is difficult to obtain sufficient product strength

Method used

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  • Joint and automotive seat frame
  • Joint and automotive seat frame
  • Joint and automotive seat frame

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0028] First, an automobile seat frame according to an embodiment of the present invention will be described in detail with reference to the drawings. figure 1 It is a front view of an automobile seat frame according to an embodiment of the present invention. figure 2 for figure 1 rear view of car seat frame. image 3 for along figure 2 A partially enlarged cross-sectional view of line A-A.

[0029] An automobile seat frame 1 includes: a rear panel 2 formed of aluminum or an aluminum alloy; a frame tube 3 formed of iron or an iron-based alloy; and fastening pins 4 for fastening the rear panel 2 and the frame tube 3 . In the automobile seat frame 1 , the frame pipe 3 is fixed to the rear panel 2 by joining the fastening pin 4 and the frame pipe 3 in a state where the fastening pin 4 penetrates the rear panel 2 .

[0030] Figure 4 It is a rear view showing the structure of the rear panel of the automobile seat frame according to the embodiment of the present invention. ...

Embodiment 1

[0064] An aluminum panel (corresponding to the rear panel 2) formed of an aluminum alloy (A5182) with a through-hole (corresponding to the through-hole 20) and further cationic-coated on the surface is used, the plate thickness is 1.6mm, and the tensile strength Frame pipes with a strength of about 1470MPa and a Vickers hardness of HV478 (STAM (electric resistance welded carbon steel pipe for automotive structures): corresponding to frame pipe 3), and those formed of plates with a thickness of 0.8mm and a Vickers hardness of HV92 fastening pin (corresponding to fastening pin 4A), to carry out resistance spot welding with a current value of 5.0kA, an energization time of 100 milliseconds and a welding pressure of the fastening pin to the frame tube of 0.5kN, thus manufacturing such as Figure 9 The joint body shown was used as a test piece. In addition, the diameter of the protruding portion of the fastening pin is smaller than the diameter of the through-hole of the aluminum p...

Embodiment 2

[0066] In the test piece of Example 2, the wall thickness of the frame tube was set to be 1.0 mm, the tensile strength was about 980 MPa, the Vickers hardness was HV352, and the current value at the time of joining was set to 4.0 kA. In addition, it was the same as that of Example 1. same. In Example 2, the difference in hardness before joining was 260.

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Abstract

A joint according to the present invention comprises: a thin plate in which a plurality of through holes are formed along the outer periphery thereof; a first member having a base part a portion of which contacts the thin plate, and projecting parts that project to the surface of the base part on the side contacting the thin plate, and are inserted into the through holes; and a second member disposed on the opposite side from the base part with the thin plate interposed therebetween, the second member comprising a material of the same system as the first member, the thin plate comprising a material having a lower specific gravity than the material constituting the first member and the second member, a part of each of the second member, and the end part of the projecting parts on the opposite side from the side continuing to the base part, being melt-solidified and joined, and the hardness difference after joining being 90% or less of the hardness difference before joining, in a range within 30% of a direction intersecting with the joining interface, when the joining interface between the second member and the projecting parts is defined as the center.

Description

technical field [0001] The present invention relates to a joint body and an automobile seat frame. Background technique [0002] In recent years, technologies for replacing iron-based materials with aluminum-based materials have been studied for the purpose of reducing the weight of various parts for automobiles. Aluminum-based materials are suitable for light weight, but if all aluminum-based materials are used, it is difficult to obtain sufficient product strength. Therefore, a proposal to replace part of the iron-based material with an aluminum-based material has been studied. When substituting an iron-based material with an aluminum-based material, it is necessary to join the iron-based material and the aluminum-based material. [0003] Various techniques have been proposed for suppressing the generation of intermetallic compounds that cause a decrease in joint strength when joining an iron-based material and an aluminum-based material by welding (see, for example, Pat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60N2/68B23K11/11B23K11/20F16B11/00
CPCB23K11/11B23K11/20B60N2/682B60N2/686B23K2101/006B23K2103/20F16B5/0096F16B5/123
Inventor 山内雄一郎依田悠佐藤拓也后藤克司安藤公一佐藤文音
Owner NHK SPRING CO LTD