| 摘要 |
PURPOSE: To reliably avoid cracks of cup tappets by connecting a round member of pressure plate to a carbonized cup cylindrical member with a friction welding method. CONSTITUTION: A member of pressure plate 11 is designed as a flat round in the weld area, the outer diameter D of the round plate 11 is bigger than the outer diameter d of a cup cylindrical member 12. And, the cup cylindrical member 12 is carbonized before welding. The projective part 30 of the pressure plate 11, that is radially projective, is bonded and welded by a friction weld method. After the welding, the projection 30 and the outer welding bun 29 are removed by cutting. As the friction welding method is used after carbonization, a unique friction heat can be obtained and a reliable welding connection without cracks is obtained. |
