초록 ▼

A multistage gear-rolling apparatus of the present invention comprises a roller squeezing apparatus including a roughing roller die and a finishing roller die disposed coaxially and connected in series in an axial direction of said roughing roller die. The roughing roller die is used for carrying ou

A multistage gear-rolling apparatus of the present invention comprises a roller squeezing apparatus including a roughing roller die and a finishing roller die disposed coaxially and connected in series in an axial direction of said roughing roller die. The roughing roller die is used for carrying out a hot rough-rolling step. The finishing roller die is used for a warm finish-rolling step. Thus, immediately after the hot rough-rolling step, the warm finish-rolling step can be carried out without a reset of workpiece.

대표청구항 ▼

[ What is claimed is:] [1.] A multistage gear-rolling apparatus comprising:a workpiece holding portion for holding a workpiece to be transformed into a rough-rolled gear;a motor for rotating said workpiece holding portion with said workpiece;a clutch disposed between said motor and said workpiece ho

[ What is claimed is:] [1.] A multistage gear-rolling apparatus comprising:a workpiece holding portion for holding a workpiece to be transformed into a rough-rolled gear;a motor for rotating said workpiece holding portion with said workpiece;a clutch disposed between said motor and said workpiece holding portion, said clutch capable of varying a transmitting ratio between said motor and said workpiece holding portion;a first roller squeezing apparatus capable of squeezing said workpiece and withdrawing from said workpiece, said roller squeezing apparatus including at least a first roughing roller die and a first finishing roller die disposed coaxially and connected in series in an axial direction of said roughing roller die, said roughing roller die having a plurality of forming teeth arranged in a circumferential direction for a rough-rolling step, said finishing roller die having a plurality of forming teeth arranged in a circumferential direction for a finish-rolling step;a second roller squeezing apparatus facing said first roller squeezing apparatus, said second roller squeezing apparatus capable of squeezing said workpiece and withdrawing from said workpiece, and second roller squeezing apparatus having at least a second roughing roller die and a second finishing roller die disposed coaxially and connected in series in an axial direction of said second roughing roller die, said second roller squeezing apparatus being movable independent of said first roller squeezing apparatus;means for adjusting a phase of said forming teeth of said first roughing roller die and a phase of said forming teeth of said first finishing roller die to each other in a circumferential direction; andengagement controlling means for controlling said engagement between said forming teeth of said first finishing roller die and the teeth of said rough-rolled gear in a circumferential direction, said engagement controlling means maintaining a circumferential phase-relationship between said teeth of said rough-rolled gear formed by said first and second roughing roller dies and said forming teeth of said first and second roughing roller dies, said engagement controlling means rotates said first roughing roller die, said first finishing roller die, said second roughing roller die, said second finishing roller die and said workpiece held on said workpiece holding portion, squeezes said first and second roller squeezing apparatuses to said rough-rolled gear with said phase-relationship immediately after said rough-rolling step, and said forming teeth of said first and second finishing roller dies are smoothly engaged with said teeth of said rough-rolled gear;wherein said first roller squeezing apparatus and said second roller squeezing apparatus are driven synchronously in a radial direction with respect to one another.