| 摘要 |
Method for manufacturing a jack or hydraulic, pneumatic and/or oleopneumatic cylinder including a tubular cylindrical body at whose ends a bottom and a head are fastened Inside, a piston slides integral with a rod. In order to irremovably fasten the head and the bottom to the tubular body of the jack without threading and/or welding procedures, it includes at the end of the tubular body a controlled plastic deformation extended to the whole thickness of the tubular body itself, apt to locally deform the ends thereof by generating on each of them at least a circumferential ring radially projecting inwards so as to insert in at least a specific groove arranged on the bottom and on the head inserted in the tube itself, respectively, so as to lock them in sito. The plastic deformation guarantees the mechanical seal of the coupling between tube and bottom and tube and head. |
