| 摘要 |
A thread-rolling machine includes a vertical rotating shaft journalled on a machine base, and a thread-rolling unit. The thread-rolling unit includes a plurality of angularly equidistant rotatable rolling plates fixed on the rotating shaft, and a plurality of angularly equidistant fixed rolling plates fixed on the machine base and disposed around the rotatable rolling plates. During rotation of the rotating shaft, nail-shaped blanks are fed simultaneously onto the thread-rolling unit. Each of the blanks is rolled between a respective one of the rotatable rolling plates and a respective one of the fixed rolling plates, thereby forming a bolt.
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