| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve remarkably an anti-bending characteristic without accompanying any trouble in processing work at a structure in which one end part of a pipe material is brazed to a supporting member such as a flange plate and the like.SOLUTION: A fitting part 16 fitted into a fitting hole 15 of a flange plate 12 in an EGR upper pipe 11 is separated into a fixed part 16a fixed to the flange plate 12 with solder 18 and a non-fixed part 16b with a clearance 19 being opened outside an outer circumferential surface. An annular concave part 20 is formed at an end part near the non-fixed part 16b in the fixed part 16a, and the annular concave part 20 is an accumulation part for solder 18. When a bending force acts against the EGR upper pipe 11, a stress is at first concentrated at a joint part of the fixed part 16a in the non-fixed part 16b and then the EGR upper pipe 11 abuts against an opening edge 15a of the fitting hole 15, thereby the stress concentrated location is moved. The stress concentrated location can be dispersed, resulting in that an anti-bending characteristic can be remarkably improved.</p> |
