SHAPING OF CONVEXO-CONVEX SHELL THIN-SHEET PARTS BY STRETCH-WRAP FORMING,申请号RU20140102822-传众专利搜索

SHAPING OF CONVEXO-CONVEX SHELL THIN-SHEET PARTS BY STRETCH-WRAP FORMING

申请公布号：RU2573859(C2)

申请号：RU20140102822

申请日期：2014.01.28

申请公布日期：2016.01.27

申请人：

FEDERAL'NOE GOSUDARSTVENNOE BJUDZHETNOE OBRAZOVATEL'NOE UCHREZHDENIE VYSSHEGO PROFESSIONAL'NOGO OBRAZOVANIJA "SAMARSKIJ GOSUDARSTVENNYJ AEHROKOSMICHESKIJ UNIVERSITET IMENI AKADEMIKA S.P. KOROLEVA (NATSIONAL'NYJ ISSLEDOVATEL'SKIJ UNIVERSITET)" (SGAU)

发明人：MIKHEEV VLADIMIR ALEKSANDROVICH;SAVIN DMITRIJ VALER'EVICH;SUDUDIN SERGEJ VIKTOROVICH

分类号：B21D11/20

主分类号：B21D11/20

摘要：FIELD: process engineering.SUBSTANCE: invention relates to metal forming and can be used for production of shells for aircraft at stretch-wrap NC machines. Claimed process includes two stretch-wrap steps that follow. Rectangular blank is stretched-wrapped after its wrapping to the complete coverage of stretch-wrap male die angle equal to 90 degrees. Then, the shell part is stretched-wrapped at its new position from the unbending angle by stretching of formed blank side sections free from the clamps. Between said steps shell surface is unloaded and unbent by the surface development through a definite angle to get the surface isometric shape relative to stretch-wrap surface shape. After second step, the shell part is subjected to reverse wrapping through said complete angle of 90 degrees owing to initial isometric shape of appropriate male die surface.EFFECT: reduced irregular stretching in both directions of the sheet.14 dwg