Metal Industries Research & Development Centre

Wan-Chi Chang

Sheng-Chi Tsai

Chih-Peng Hsu

Can-Xun Chang

Ping-Hsun Tsai

A spiral bevel gear forging apparatus for forging a blank includes a first mold core having a mold cavity for receiving the blank, a first punch rod inserted movably into the first mold core and having a positioning end extending into the mold cavity for releasable engagement with a bottom of the blank, at least one push mechanism, and a drive mechanism. When the drive mechanism is operated to move from a non-ejecting to an ejecting position, the push mechanism is actuated to drive the first mold core to rotate about the first punch rod, and the first punch rod is actuated to move relative to the first mold core such that the positioning end thereof is moved out of the mold cavity for ejecting the blank out of the first mold core.

Spiral bevel gear forging apparatus

An extrusion die device includes a first die having a shaping hole. An inner periphery of the shaping hole has a plurality of twisted guiding portions. A second die includes a plurality of guiding holes. A bridge is formed between two adjacent guiding holes. A plurality of tongues extends from a surface of each bridge and each includes an input end face contiguous to the bridge and an output end face whose projection on the surface of the bridge has an angular shift relative to the input end face. A side of the second die is coupled to an input side of the first die. The tongues are received in the shaping hole. Material is squeezed through a passage between each tongue and the inner periphery of the shaping hole and rotates according to the twisting direction of the tongues, forming a hollow object with an integrally formed helical rib.

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Kaohsiung, Taiwan

Wan-Chi Chang