| 摘要 |
PROBLEM TO BE SOLVED: To form a complex-shaped mainplate having various cross-sectional heights, using an inexpensive plastic working which easily stabilizes the quality, without using expensive cutting operation or a method of pressing in other parts such as pins or tubes. SOLUTION: As a method of plastically working the mainplate, a half- blanking technique is used to do away with dredging work while securing the overall thickness of the mainplate, resulting the height of a certain member, and replacing a positioning pin, and a forging press technique is used to machine the entrance parts of mortises while machining the sliding parts of a minute wheel, providing pressurization including measures for preventing warping, and pressing the surfaces of general holes, and a burring technique is used to form a fitting height for standing a direct screw and to replace the positioning pin.
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