| 摘要 |
TO PROVIDE A PROCESS OF MANUFACTURING A PIPE MEMBER CAPABLE OF IMPROVING ACCURACY OF MATING SURFACE BETWEEN THE PIPE MEMBER AND MEMBERS TO BE CONNECTED, AND IMPROVING RELIABILITY OF CONNECTION STRENGTH.A PROCESS OF MANUFACTURING A PIPE MEMBER (25) COMPRISES STEPS OF: PUNCHING BOTH ENDS OF A FLAT PLATE (25') HAVING A DIMENSION (A) OBTAINED BY UNFOLDING THE PIPE MEMBER (25) IN THE CIRCUMFERENTIAL DIRECTION TO A SHAPE (B') OBTAINED BY UNFOLDING THE CONTACT SURFACE BETWEEN THE PIPE MEMBER (25) AND THE MEMBERS TO BE CONNECTED, FORMING THE FLAT PLATE (25') INTO A CYLINDRICAL BODY, AND WELDING BUTTING PORTIONS OF THE FORMED CYLINDRICAL BODY TO EACH OTHER.(FIG. 6)
|
