| 摘要 |
PROBLEM TO BE SOLVED: To prevent a heat losing crack, to reduce a number of heatings and to improve forging efficiency by interposing a heated temp. insulating member between a member to be forged and a lower anvil and forging while suppressing heat loss of the member to be forged. SOLUTION: A heat insulating member 4 is placed on the rotary table (lower anvil) 2 of a forging device 1, a member to be forged (product) 5 is placed on the temp. insulating member 4. While rotating the rotary table (lower anvil) 2, the member to be forged (product) 5 is pressed by an upper anvil 3 to be forged. The temp, insulating member 4 is a disk having the size smaller than the rotary table (lower anvil) 2 and larger than the member to be forged (product) 5. The heat insulating member 4 does not require a crack prevention treatment, has a large heat capacity and is desirably a Ni base stainless steel. The member to be forged (product) 5, for example in the case of SUS630, is desirably heated to 1100-1200 deg.C and the heat insulating member 4, for example, in the case of a Ni base stainless steel, is desirably heated to 700-1000 deg.C.
|
