| 摘要 |
The present invention provides technology for suppressing a decrease in the accuracy of a spark discharge gap of a spark plug. A method for manufacturing a spark plug provided with a center electrode that extends in an axis direction, a main metal fitting that is provided at the outer periphery of the center electrode, and a ground electrode that is rod-shaped and has a base end joined to the main metal fitting and a leading end bent to the axis side, the method being provided with a bending step for bending a not-yet-bent ground electrode that is the ground electrode not yet bent by pressing the not-yet-bent ground electrode against a predetermined curved surface of a bend spacer, wherein the bend spacer is configured to be divisible into two or more members including a first member including a mounting part for mounting the bend spacer to a fixing jig, and a second member including the predetermined curved surface that is in contact with the not-yet-bent ground electrode. |
