MANUFACTURING METHOD OF PISTON OF VEHICLE DISC BRAKE, SPINNING PROCESSOR OF PISTON OF VEHICLE DISC BRAKE AND PISTON OF VEHICLE DISC BRAKE

• Main Authors: HIGAKI KOJI, NAOI TAKASHI, USUDA SEIJI, MOTOYAMA HIROKAZU, HIRATA MASASHI
• Format: Patent
• Language: English; Japanese
• Published: 08.08.2019
• Subjects: BLASTING; BRAKES; CLUTCHES; COUPLINGS FOR TRANSMITTING ROTATION; CYLINDERS; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS,WHEELS, RINGS, BARRELS, BALLS; MECHANICAL ENGINEERING; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORMING OPERATIONS; PISTONS; PUNCHING METAL; SEALINGS; THERMAL INSULATION IN GENERAL; TRANSPORTING; WEAPONS

To provide a manufacturing method of a piston of a vehicle disc brake for forming a corner between an opening end-part side external peripheral end part and an opening end part into a desired R-shape by applying spinning processing by using a prescribed pressing roller without preparatorily forming a base material having a straight shape.SOLUTION: An annular groove 54 is formed by rotating a bottomed cylindrical base material 15. An opening end-part side external peripheral end part 20, an opening end part 19 and a corner 21 are formed by pressing, from the opening end part 19 and an external peripheral face 18, a groove forming roller 3 having a protrusive groove forming part 32 from the external peripheral face 18 of the base material 15, a corner forming roller 4 having an external peripheral end-part forming part 42 contacting with the opening end-part side external peripheral end part 20 of the base material 15, an opening end-part forming part 41 contacting with the opening end part 19 of the base material 15, and an R-shaped corner forming part 47 for forming the corner 21 between the opening end-part side external peripheral end part 20 and the opening end part 19.SELECTED DRAWING: Figure 1 【課題】ストレート形状の基材を予備成形することなく、所定の押圧ローラによってスピニング加工することで、開口端部側外周端部と開口端部との間の角部を所望のＲ状に成形する車両用ディスクブレーキのピストンの製造方法を提供する。【解決手段】有底円筒状の基材１５を回転させ、凸状の溝成形部３２を備えた溝成形ローラ３を、基材１５の外周面１８から押圧することで、環状溝５４を成形し、基材１５の開口端部側外周端部２０に接する外周端部成形部４２と、基材１５の開口端部１９に接する開口端部成形部４１と、開口端部側外周端部２０と開口端部１９との間の角部２１を成形するＲ状の角部成形部４７とを備えた角部成形ローラ４を、開口端部１９および外周面１８から押圧することで、開口端部側外周端部２０および開口端部１９および角部２１を成形する。【選択図】図１