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专利名称：Method of assembling tube arrays发明人：J. B. Spitzmesser,R. J. Cameron,F. D.
Doty,Brian L. Miller
申请号：US07/356116申请日：190524公开号：US0410A公开日：19900130
摘要：A method of assembling a plurality of microtubes rigidly into position so as tofacilitate their rapid interference pressing into metallic header tubestrips is disclosedthat is particularly well suited for the Microtube-Strip (MTS) gas-gas counterflow heatexchanger design. The technique, utilizing fusible alloys, non-sacrificial fixtures, and a highspeed, gas powered machine gun tube insertion device, permits tube alignment, insertion,and welding rates to exceed 1,500,000 pieces per day per production line at greatlyreduced costs. The following sequence of operations is followed: the tubes are finishedto the required length; the tubes are inserted into adjacent, parallel, precision, non-sacrificial spacer forms, similar in size and pattern to the header tubestrips but withprecision, slip-fit, countersunk holes; the spacer forms are slid apart to near oppositeends of the tubes; caps are placed over the ends of the tubes to secure the tube ends;the tube-spacer-cap fixture assembly is placed in a suitable mold; molten, fusible alloy ispoured, or optionally it is vacuum-injected, into the heated mold; the mold is cooledbelow the solidus temperature; the encapsulated assembly is removed; the securing capsand spacer forms are slid off, exposing the tube ends; the assembly is loaded into asuitable fixture on a press and the header tubestrips are pressed onto opposite ends of
the tubes; the fusible alloy is melted and cleaned from the assembly.
申请人：DOTY SCIENTIFIC INC.
代理机构：Brumbaugh, Graves, Donohue & Raymond
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