| 摘要 |
FIELD: metallurgy. ^ SUBSTANCE: method includes tubes drawing bevel draw die on fixed cylindrical mandrel. High accuracy of pipes dimensions, excluding action after drawing of out-contact plasto-elastic deformation, is provided ensured by graduation of outer diametre of pipe is implemented by drawing, diametre of finishing part which is accepted as equal to Ddraw=D(1+0.035log), where D - nominal external diametre of finished pipe, - elongation ratio by section of pipe, graduation of pipe inner diametre is implemented by straight plug, diametre of which is accepted equal to DmanÇè=d(1+0,025log), where d - nominal inner diametre of finished pipe, herewith elongation ratio by section of pipe is 1.25ëñëñ1.48, and elongation ratio by wall of pipe s is 0.90ëñsëñ0.94. ^ EFFECT: invention provided for dimensional accuracy increasing of section of thin-walled precision pipes at its manufacturing in preference for envelopes fuel elements of nuclear reactors from corrosionproof steels. |
