| 摘要 |
PURPOSE:To reduce the cost of a metal die by providing a recessed part for padding with L shaped cross section at the part corresponding to the working part of a die, padding a material harder than a base metal as well and machining a reference face and padding part. CONSTITUTION:A casting mold 10 in specific shape is formed by casting and the recessed part 13 for padding is formed in L sectional shape at the part corresponding to the working part 11 of the die, i.e., a peripheral edge part 12 of an outer peripheral edge part 12a, an inner peripheral edge part 12b, etc., of through hole of a punch. A padding part 14 is then formed by arc welding, etc., at the recessed part 13. In this case, the material harder than the base metal of the mold 10 is used for the material composing the padding part 14. After machining the reference face 16 of the mold 10 by using a milling machine 15, etc. Thereafter the padding part 14 upper face 17 is finished by machining. The manufacturing time of the die is shortened with the machining once, thus reducing the die cost.
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