| 摘要 |
This invention provides a method for joining a material that is free from troubles such as overhang of protrusions which causes restriction on design, and loosening and falling, can realize joining of materials widely ranging from thin plates to thick plates and, at the same time, can avoid the occurrence of quality defects such as cracking or deformation and can realize joining with excellent recycling efficiency while maintaining good workability and working environment. The method comprises superimposing a second material (2) on a first material (1) having a previously formed joining hole (3) so as to cover the joining hole (3), pressing, against the second material (2), a joining tool (8) disposed so as to correspond to the joining hole (3) while rotating the joining tool (8), locally softening the second material (2) in a solid phase state by taking advantage of frictional heat, intruding the second material (2) into the joining hole (3) in the first material (1), forming a geometric engagement part (a crest part (5') and an anchor part (6')) of the second material (2) intruded into the joining hole (3) with the first material (1) side, then withdrawing the joining tool (8), and hardening the engagement part to join the first material (1) to the second material (2). |
