PIPE JOINING BODY, TREATMENT TOOL, AND JOINING METHOD

摘要

Provided is a pipe joining body in which a wire rod and a tubular member are joined. The wire rod includes a concave portion formed by plastically deforming a part of an outer periphery of the wire rod. The tubular member includes a deformed portion that is formed so as to enter the concave portion by inserting the wire rod into the tubular member and by pressing a portion of the tubular member covering the concave portion toward the concave portion to plastically deform the portion. A maximum displacement amount of the tubular member when the deformed portion is formed is not larger than a maximum displacement amount of the wire rod by the plastic deformation when the concave portion is formed. The concave portion is formed by bringing a mold having a convex surface into contact with the part of the outer periphery of the wire rod to press.

主权项

1. A pipe joining body in which a wire rod and a tubular member are joined, wherein:
the wire rod includes at least one concave portion formed by plastically deforming a part of an outer periphery of the wire rod; the tubular member includes at least one deformed portion that is formed so as to enter the at least one concave portion by inserting the wire rod into the tubular member and by pressing a portion of the tubular member covering the at least one concave portion from an outer periphery of the tubular member toward the at least one concave portion to plastically deform the portion; a maximum displacement amount of the tubular member when the deformed portion is formed is not larger than a maximum displacement amount of the wire rod by the plastic deformation when the concave portion is formed; the at least one concave portion is formed by bringing a transfer mold having a convex transfer surface into contact with the part of the outer periphery of the wire rod to press; and the at least one deformed portion is formed by bringing a transfer mold having a transfer surface of a same shape as that used for the wire rod, into contact with the outer periphery of the tubular member to press.