초록 ▼

A vacuum sealing means for a high production electron beam welding machine incorporating a rotary indexing table carrying parts to be welded from a loading position to a welding position under a stationery electron beam gun and then to an unloading station. Sealable pockets on the rotating index tab

A vacuum sealing means for a high production electron beam welding machine incorporating a rotary indexing table carrying parts to be welded from a loading position to a welding position under a stationery electron beam gun and then to an unloading station. Sealable pockets on the rotating index table carrying the parts to be welded are carried through a sealed off low volume space into a first pre-pumping station where air in the pocket is brought to a pressure intermediate between the atmospheric pressure and the pressure required during the welding of the parts. After pre-pumping, the pockets are indexed to a second pumped area where the pocket is evacuated to the pressure suitable for welding. The table is then indexed through an area at the pre-pumping pressure and then through another sealed off space at atmospheric pressure to the ejection station. The first and the last sealed off spaces at atmospheric pressure are means for preventing a large volume intake of air from the atmosphere surrounding the machine into the pumping system.

대표청구항 ▼

An electron beam welding machine for the continuous welding of parts in series comprising a circular table, a seal plate disposed above said circular table, sealable pockets arranged equi-distant from each other adjacent the outer edge of the said table, means within said pockets for supporting work

An electron beam welding machine for the continuous welding of parts in series comprising a circular table, a seal plate disposed above said circular table, sealable pockets arranged equi-distant from each other adjacent the outer edge of the said table, means within said pockets for supporting workpieces to be welded by an electron beam, means for rotating the said table in a step wise fashion against a sealing arrangement comprising “N”number of continuous flexible seals mounted upon the said seal plate one surrounding the next so as to form “N”number of sealed spaces between the table and the seal plate, additional continuous resilient seals surrounding areas adjacent to each end of the outermost of the aforementioned sealed spaces, means for positioning one of said pockets so that it communicates with the innermost of the aforementioned sealed spaces which is maintained at a desired welding pressure while the fOllowing N-1 pockets are positioned so that they communicate each with a separate space which is maintained at a pressure intermediate to the atmospheric pressure and the welding pressure, means for generating, focusing and deflecting a beam of electrons, and means for indexing each of said pockets in sequence into a position under the said electron beam means for a pre-set interval of time.