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Bolt for projection welding and method of welding the same

A welding method, technology for projection welding, applied in the direction of welding medium, welding equipment, welding equipment, etc.

Active Publication Date: 2008-10-01
青山好高
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is difficult to require a sufficient melting depth for the thinned part

Method used

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  • Bolt for projection welding and method of welding the same
  • Bolt for projection welding and method of welding the same
  • Bolt for projection welding and method of welding the same

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0105] The dimensions and shapes of bolts for projection welding will be described below.

[0106] The shape of bolts for projection welding made of iron is as follows: Figure 1A shown. This bolt 1 is formed by a shaft portion 2, a circular diameter-expanding portion 3, a circular protrusion 4 for welding, and a plastic deformation portion 7, wherein an external thread is formed on the shaft portion 2, and the expansion portion The diameter portion 3 is integrally formed with the shaft portion 2, and the diameter of the enlarged diameter portion 3 is larger than the diameter of the shaft portion 2, and the protrusion 4 for welding is arranged on the enlarged diameter portion opposite to the shaft portion 2. In the center of the part, the plastic deformation part 7 is formed by connecting the outer peripheral part of the enlarged diameter part 3 and the base part 5 of the welding protrusion 4 by using the inclined surface 6 which becomes lower on the outer peripheral part sid...

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Abstract

A bolt for projection welding, and method of welding the same, adapted to form a portion of large fusion depth in narrow region and ensure junction to a steel sheet part in other portions, thereby realizing high weld strength and stable state of junction. Bolt (1) is composed of shaft part (2), enlarged diameter part (3) and fusion bonding projection (4), the fusion bonding projection (4) consisting of initial fusion part (4A) provided at its end face with taper (15) and, continuous therefrom, main fusion part (4B). Welding current for fusion of the fusion bonding projection (4) only is passed through the fusion bonding projection (4). There is made such an arrangement that upon pressurization of the fusion bonding projection (4) against steel sheet part (9) and subsequent current passage, the region of the fusion bonding projection (4) is fusion bonded to the steel sheet part (9) and simultaneously end face (6) of the enlarged diameter part positioned on the outer circumferential side of the fusion bonding projection (4) joins surface (9A) of the steel sheet part (9). As a result, good welding with appropriate state of fusion can be realized.

Description

technical field [0001] The present invention relates to a bolt for projection welding and its welding method. The bolt for projection welding is composed of a shaft part, an enlarged diameter part integrally formed with the shaft part, and a welding part arranged in the center of the enlarged diameter part. formed by protrusions. Background technique [0002] The projection welding bolt disclosed in the following patent document 1 is Figure 5A the shape shown. This projection welding bolt 20 is an iron bolt, and is constituted by a shaft portion 21, a circular diameter-expanding portion 22, and a circular protrusion 23 for welding, wherein an external thread is formed on the shaft portion 21, and the The enlarged diameter portion 22 is integrally formed with the shaft portion 21, and the diameter of the enlarged diameter portion 22 is larger than the diameter of the shaft portion 21, and the welding protrusion 23 is disposed on the opposite side of the shaft portion 21. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K11/14
CPCB23K11/0053B23K35/0288B23K11/14F16B37/061F16B35/00F16B37/06
Inventor 青山好高青山省司
Owner 青山好高