| 摘要 |
FIELD: process engineering. ^ SUBSTANCE: proposed method comprises multi-pass reduction of billets in rolls with gages. Higher efficiency of rolling results from that initial forming is performed in box-type gage asymmetric relative to vertical axis and recesses on one side of passes. Then canting for 90 and rolling in open trapezoidal gage symmetric about vertical axis are performed. Said gage is formed by passes of box-type gages of smaller and larger width. Then canting is made for 90 and rolling in two open flat-trapezoid-like split-edges gages that form profile lengthwise grooves. Lateral edges of the first split gage are made to radius with crest angle of 50-60 and crest height making 0.8 of finished profile groove height. Then canting for 90 and rolling in the second trapezoidal gage, a leader gage, symmetric about vertical axis are performed, while final forming of profile is performed in finishing open flat-trapezoid gage. ^ EFFECT: improved quality of finished products. ^ 1 dwg, 1 ex |
