The present invention relates to a manufacturing method of a nipple pipe water hammer shock absorption machine, and more particularly, once the washer forming step to form a washer in the pipe; Wrinkle part forming step of forming the folds between the washer and the front end of the pipe; Wherein wrinkles additional pipe diameter formal process for the pipe diameter of the formed pipe so that the shape of the garden by the hydraulic hose presses of tolerance; jidoe made in the washer forming process that was laid so that the distal end portion of the pipe protruding from the fixed mold fixed then, the by instantaneous pressure through the movable mold to the leading end of the pipe has a large diameter washer than the diameter of the pipe to the predetermined distance the outer peripheral surface of the spaced pipe from the pipe end protruding molding, the folds-forming process in the upper and lower mold then placed so as to project the pipe washer is formed in the fixed mold composed of more than a fixed mold, by moving the movable mold to the leading end of the extruded pipe, by the moment presses the front end of the pipe that is wrinkled portion is formed between the pipe end and the washer characterized It relates to a water hammer shock absorption machine pipe nipple manufacturing method.
Thus, the present invention is water hammer shock absorbing formed integrally with a wrinkled copper pipe tip to be entered into Excel pipe without a separate connecting member appointed pipes there is no confidentiality is sure to leak, and the production time is fast product defects the less there is a remarkable effect.