FIELD: machine building.
SUBSTANCE: work piece is broached in cold condition with upper and lower deforming tools. Broaching is carried out in two stages. One of deforming tools initially performs progressive motion to the moment of rapid increase of deforming force and makes a bridge. Ratio of bridge thickness to diameter of the deforming tool is 1/3…1/4. Further, the same deforming tool performs progressive motion simultaneously with its rotation or with rotation of the second deforming tool. Deforming tools of various diameter are used for fabrication of parts with stepped internal surface.
EFFECT: reduced metal consumption for fabrication of bush.
4 dwg, 1 ex
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