| 摘要 |
1. Press for induction-brazing for providing one of the faces of the plane bottom of a metallic piece (6) with a metallic covering (7) and comprising a rigid inductor block formed of an insulating material (2) and mounted on a stand (1) secured on the ground, and containing a heating inductor (3) adapted to be fed by an alternating current and a jack comprising an axially movable rod which is coaxial with the block (2) for assuring the relative movement of this block (2) and the piece (6) carrying the covering (7) and exerting a pressure onto the latter, and at least one mandrel (40) for supporting the piece (6) and comprising in superposition : a metallic base (41) coupled to the stand or to the rod of the jack, a first disc (46) of a refractory, thermally insulating material, and a second metallic disc (47), characterized in that each mandrel (40) further comprises a third disc (49) disposed on the second metallic disc (47) and formed of a material which is known per se, based on expanded graphite having a lamellated structure oriented in parallel to the bottom of the piece (6) and having a high anisotropy of its thermal conductivity in a manner to homogenize the temperature distribution at the interface of its contact with the other face of the bottom of the piece (6), and a marked compressibility in a manner to render uniform the pressures exerted onto the different portions of the interface between the bottom of the piece (6) and the covering (7) the radial dimensions of which are at least slightly smaller than those of the third disc (49). |
