| 摘要 |
A manufacturing process for a chain tool attached to a bicycle folding tool included the following steps: Material preparing step: a rod with a length is prepared. Manufacturing step: the rod is milled via a milling cutting step to form a chain fixing groove, a detaching portion, an axial groove and a screwing portion, the chain fixing groove having a retaining wall, the retaining wall being milled to form an arc notch, the screwing portion being threaded to form a threaded hole via a drilling and tapping step. Heat treatment step: after the manufacturing process, the rod is heat treated. Sheet metal part assembling step: a sheet metal part is assembled to the chain tool by at least one connecting part; therefore, the chain tool is attachable to the sheet metal part. |
| 主权项 |
1. A manufacturing process for a chain tool in combination with a sheet metal part, comprising following steps:
(a) material preparing step: a rod with a length being prepared; (b) manufacturing step: the manufacturing step comprising a milling cutting step and a drilling and tapping step, the rod being milled via the milling cutting step to form a chain fixing groove, a detaching portion, an axial groove and a screwing portion, the chain fixing groove having a retaining wall defined therein, the retaining wall being milled to form an arc notch, the axial groove being defined in one end of the rod and communicating with the chain fixing groove, the screwing portion being threaded to form a threaded hole via the drilling and tapping step, wherein the axial groove, the arc notch and the threaded hole are defined coaxially; (c) heat treatment step: after the manufacturing step, the rod being heat treated and forming a chain tool; and (d) sheet metal parts assembling step: choosing a sheet metal part, a pressing rod and a controlling member; and then the sheet metal part, the pressing rod and the controlling member being assembled to the chain tool, the pressing rod having a bending end, an operating end and a threaded section which is defined between the bending end and the operating end; the controlling member having a second assembling portion, a plurality of second clamping grooves and a second operating part; the second assembling portion of the controlling member being assembled to the bending end of the pressing rod; the operating end of the pressing rod being inserted into the threaded hole firstly; and then, the threaded section being screwed into the threaded hole; the controlling member being located outside the chain tool, so that a user rotates the pressing rod conveniently, such that the threaded section of the pressing rod is rotated relative to the threaded hole. |
