METHOD OF PRODUCING AIRCRAFT RETICULAR AIRFRAME FLOOR BEAM FROM POLYMER COMPOSITE MATERIALS Russian patent published in 2011 - IPC B29C53/56 B64C1/00 

FIELD: process engineering.

SUBSTANCE: invention relates to plastic forming, coiling and jointing, and may be used in aircraft and aerospace engineering. In compliance with proposed method, rubber-like protector with spiral, lengthwise and crosswise grooves is, first, fitted on mandrel. Then, shaping elements are applied onto article workpiece to be thermally treated. Now core is withdrawn from collapsible rubber-like protector. Note here that prepreg unidirectional tapes are wound in protector grooves on the mandrel. The latter is made up of two hollow tubes clamped as-strained by long stud and having flanges arranged on their ends furnished with reverse studs and closed-section protector from rubber-like elastic material.

EFFECT: ease of manufacture, higher precision of article production, improved strength characteristics.

5 dwg