MACHINING APPARATUS, COMPONENT PRODUCING METHOD, AND SPARK PLUG PRODUCING METHOD

• Main Authors: KIMIAKI SATO, HAJIME KAWANO
• Format: Patent
• Language: Chinese; English
• Published: 14.09.2018
• Subjects: BASIC ELECTRIC ELEMENTS; CORONA DEVICES; ELECTRICITY; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES; MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS,WHEELS, RINGS, BARRELS, BALLS; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; OVERVOLTAGE ARRESTERS USING SPARK GAPS; PERFORMING OPERATIONS; PUNCHING METAL; SPARK GAPS; SPARKING PLUGS; TRANSPORTING

The invention provides a machining apparatus, a component producing method, and a spark plug producing method. The machining apparatus can reduce the deviation of an axial distance from a flange portion to a threaded tooth. The machining apparatus is an apparatus for rolling external threads on an axial portion of a workpiece with the flange portion protruding in a flange shape. A measuring devicethat includes a base having a base reference surface to which a workpiece reference surface is opposed, measures a gap in an axial direction between the base reference surface and the workpiece reference surface by use of a fluid flowing between the base reference surface and the workpiece reference surface in a state where the workpiece reference surface is opposed to the base reference surface.A mold, a distance to which in the axial direction from the base reference surface is known, forms the external threads on the axial portion toward a direction away from the flange portion through rolling. A calculation devic