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公开(公告)号：US3722068A
公开(公告)日：1973-03-27
申请号：US3722068D
申请日：1971-02-22
Applicant: NORTHROP CORP
Inventor： MANCHESTER W , MORRIS C , HILL J
CPC classification number: B21D25/02 , Y10S29/045 , Y10S72/70 , Y10T29/4981
Abstract: A method of forming titanium sheets and the like in which a sandwich structure consisting of a titanium sheet is placed in an envelope constructed of mild hot rolled steel, forming the sandwich structure utilizing a stretch forming operation, bracing the sandwich structure insuring that it will retain its shape during a stress-relieving operation, performing the stress relieving operation and removing the shaped titanium sheet from the envelope.
Abstract translation: 一种形成钛片等的方法，其中将由钛片组成的夹层结构放置在由温和热轧钢构成的外壳中，利用拉伸成形操作形成夹层结构，支撑夹层结构，确保其保持 其在应力消除操作期间的形状，执行应力消除操作并且从外壳去除成形钛片。
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公开(公告)号：US3823303A
公开(公告)日：1974-07-09
申请号：US28442272
申请日：1972-08-28
Applicant: NORTHROP CORP
Inventor： MANCHESTER W , HUGILL D
Abstract: A method of forming sheet metal, especially titanium, utilizing resistance heating of the sheet metal part, and forming the part by use of relatively simple ceramic dies. The forming method includes closely controlled cooling of the formed part between the forming dies before removal from the dies to eliminate undesirable warping due to uncontrolled cooling.
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