FIELD: plastic working of metals, namely radial forging of housings of cylinders of plunger pumps, barrels of artillery guns, pipelines for chemical industry branches.
SUBSTANCE: method comprises steps of preliminarily applying onto inner surface of initial tubular blank technological lubricant and radial forging of blank for forming duct in it. Forging is realized on stationary short forging mandrel with cone working surface and simultaneously duct surface is ironed by means of additional mandrel with cylindrical calibration band for receiving final size, shape and roughness of its surface. Additional ironing mandrel is secured to forging mandrel at side of its cone surface. Liquid technological lubricant is positively fed through radial passages of forging die uniformly arranged along perimeter of cone surface and hydraulically communicated with lengthwise duct.
EFFECT: simplified process of making enhanced quality articles.
9 cl, 3 dwg, 1 ex
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