JP2002079341A5

JP2002079341A5 -

Info

Publication number: JP2002079341A5
Application number: JP2000273315A
Authority: JP
Filing date: 2000-09-08
Publication date: 2004-11-04
Anticipated expiration: 2020-09-08

Description

【００１５】
上記鍛造装置２１でピアス材Ｗ３から歯車Ｗ４を形成する場合、予めエア供給装置７１から供給されるエアはエア導入孔５６を通ってエア案内部５４に向かって放出され、更にエア案内部５４に沿って鍛造金型４３の成形部４４側に放出される。そして潤滑ホース８１から放出される潤滑剤は、図４に示す如く、エア導入孔５６を通って放出されるエアと衝突して鍛造金型４３の内周側に位置する成形部４４、特に歯型４５付近に拡散して付着する。この状態で、図３左半部に示す如く、ピアス材Ｗ３を型彫空間４６に投入し、ピアス材Ｗ３の内周を内マンドレル５２の外周に嵌合すると同時にピアス材Ｗ３の下端を外マンドレル５３の上端に載置する。続いて上型３１を下降させ、上型３１の押圧面３４でピアス材Ｗ３を下方へ押圧して、図３右半部に示す如く、径方向に拡径した大径の鍔部１７と、鍛造金型４３の歯型４５に沿って前方押出しにより歯形部１５を成形して所望する歯車Ｗ４を形成する。そしてその後、上型３１が上方へ退避するとともにノックアウトリング４９が上方へ移動し歯車Ｗ４が鍛造金型４３から取り出され、歯車Ｗ４の鍛造成形が完了する。[0015]
When the gear W4 is formed from the piercing material W3 by the forging device 21, the air supplied in advance from the air supply device 71 is discharged toward the air guiding portion 54 through the air introducing hole 56, and further to the air guiding portion 54. It is discharged to the forming portion 44 side of the forging die 43 along. The lubricant released from the lubricating hose 81 collides with the air released through the air introduction hole 56 and as shown in FIG. Diffuse and adhere to the vicinity of the mold 45. In this state, as shown in the left half of FIG. 3, the piercing material W3 is put into the engraving space 46, and the inner periphery of the piercing material W3 is fitted to the outer periphery of the inner mandrel 52, and at the same time the lower end of the piercing material W3 is the outer mandrel Place it on the top of 53. Following the upper die 31 is lowered by, presses the piercing member W3 downwardly by the pressing surface 34 of the upper die 31, as shown in FIG. 3 the right half portion, the flange portion 17 of large diameter which is enlarged in the radial direction, The tooth profile 15 is formed by forward extrusion along the die 45 of the forging die 43 to form the desired gear W4. Thereafter, the upper die 31 retracts upward, the knockout ring 49 moves upward, the gear W4 is taken out from the forging die 43, and forging of the gear W4 is completed.