METAL PLATE, LAMINATED PLATE COMPONENT AND PRODUCTION METHOD OF PLATE TYPE HEAT EXCHANGER

摘要

PROBLEM TO BE SOLVED: To provide a production method capable of performing press work suppressing the degree of thickness reduction at the top of a protrusion and the bottom of a recess of a metal plate having an uneven shape to be low and to produce the metal plate having a high work height ratio h/W.SOLUTION: In a production method of a metal plate alternately having a plurality of protrusions and recesses by press-forming an original plate in a plurality of press-forming steps, press-forming is performed so as to satisfy the relations of N