| 摘要 |
1,146,214. Welding by fusion. COMMISSARIAT A L'ENERGIE ATOMIQUE. 5 April, 1967 [15 April, 1966], No. 15577/67. Heading B3R. [Also in Division H1] Two parts e.g. 1, 10 to be welded by electron bombardment are machined to provide each with two contact surfaces 35, 36, the parts are then assembled so that a vacuum seal 2 is clamped between one pair of contact surfaces 36, a leak tight enclosure 6 is established around the other contact surfaces 35 and an electron gun 7 caused to travel along the line of the second surfaces 35 to weld the parts together on these surfaces, the vacuum seal 2 remaining imprisoned after welding is completed. The electron gun is supported on an arm 8 which carries high and low voltage supplies, coolant and optical connections for weld viewing, the arm 8 passing through a seal 47 and bearings 46 in a casing 42. A further seal 44 connects the casing 42 to the part 1 and a plug 4 completes the enclosure 6 which is evacuated through a connection 5. Rotary motion of the gun is derived from a motor 13 or hand wheel while longitudinal movement may also be effected by a hand wheel (not shown). The vacuum seal may be held in a channel in one of the parts to be welded, in a chamfered corner between the parts or in two channels in a further member disposed outside the two parts to be joined (Figs. 3-10, not shown). The electron gun (Fig. 2, not shown) includes in addition to the cathode (14, 17) and anode (20) arrangement a focussing coil (21) coolant passages (12, 22) and a mirror (23) for viewing of the weld region. |
