| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of manufacturing a roof of a rail road vehicle, capable of dramatically improving the manufacturing efficiency as compared with a conventional manner.SOLUTION: In a first plastic process, at least a first flat plate material FP1 of first and second flat plate materials FP1, FP2 which are welded on a first welding process is subjected to plastic processing. Upon the first welding process, neither first flat plate material FP1 nor second flat plate material FP2 is subjected to plastic processing and, therefore, the first welding process is not affected by a strain of the plastic processing. As the result thereof, the first and second flat plate materials FP1, FP2 with no strain are used in the first welding process and, therefore, the flat plate materials FP1, FP2 can be simply and precisely welded with each other. As compared with a conventional manner, the manufacturing efficiency can be dramatically improved. |
