METHOD FOR MAKING WHEELS OF TRANSPORT VEHICLES Russian patent published in 2000 - IPC

Abstract RU 2153946 C2

FIELD: plastic metal working, namely manufacture of wide assortment of wheels for transport vehicles such as motor vehicles, aircrafts and runners of caterpiller-track transport vehicles. SUBSTANCE: method comprises steps of making wheel blank with central portion and preliminarily formed rim; drawing rim by expansion for making its profile similar to that of ready wheel; finish working of wheel. Expansion of rim part or the whole rim is performed at outer or inner side of blank with any microstructure according to temperature-speed modes corresponding to that structure. In order to provide such mode blank is made with rim whose shape and size correspond to its structure. Rim may be in the form of protrusion, mainly for blanks with large-grain, for example cast structure and with thickness more than that of rim of ready wheel by value sufficient for converting structure of most part of rim by drawing and/or heat treatment to recrystallized and/or polygonized structure or it may be in the form of flange or similar protrusion with thickness equal or almost equal to thickness of ready wheel, mainly for blanks with small-grain structure, or it may be in the form intermediate between flange and protrusion for rim with mixed structure of material (partially recrystallized, polygonized and cast structure) and with thickness in range between above mentioned values. Diametrical sizes of surfaces turned to mandrel differ from diameter of working portion of mandrel for rim with large-grain structure by value providing sliding of blank along mandrel on portions before expanded one. Expansion is realized at least by one pass. EFFECT: enlarged manufacturing possibilities, enhanced efficiency and quality. 19 cl, 12 dwg, 8 ex

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RU 2 153 946 C2

Authors

Utjashev F.Z.

Kajbyshev O.A.

Trifonov V.G.

Dates

2000-08-10Published

1998-06-24Filed