Patent ID: 6525290
Filing Date: 2003-02-25
Classification: B23K,F15B,Y10T

Abstract:
A manufacturing process for an accumulator, the process comprising:assembling a buffer member into a cylindrical shell so as to partition a interior of the shell into a gas chamber and a hydraulic chamber; and closing the shell; wherein the shell comprises shell portions divided in the direction of an axis of the shell; forming a circular circumferential portion projecting outward over the entire circumference of each joining portion of the shell portions; forming a circular protrusion projecting in a joining direction at the circular circumferential portion of at least one of the shell portions; contacting the circular protrusions with each other, alternatively the circular protrusion is brought into contact with the circular circumferential portion of another shell portion; clamping and pressing the circumferential portions by a pair of electrodes; and energizing the electrodes so as to join the joining portions by electric resistance welding.