Today the rolling of ring billets is one of perspective trends in development of the low-wasted and no-wasted technology. It allows:
· to use metal rationally at the expense of maximum approaching of geometrical dimensions of the produced billet to the finished product;
· to decrease labour expenditures by the subsequent mechanical machining ;
· to increase the service properties of rings.
The plant includes: a heating device for billets, a piercing mill, a three-high screw-rolling mill (forming mill), a cooler.
The ring-rolling plant has the output 10-12 times as high than the output of horizontal-forging machines and it provides the metal economy up to 25%.
The rolling process is mechanized and automated completely.
TECHNICAL DATA
|
Initial billet type hot-rolled rod |
Hot-rolled rod |
|---|---|
|
Initial billet dimensions diameter, mm length, mm |
60 … 120 900 … 1800 |
|
Ring billet dimensions, mm outer diameter inner diameter ring length allowance for outer diameter tolerance for outer diameter allowance for inner diameter tolerance for inner diameter allowance for thickness tolerance for thickness e |
49 … 112 37 … 80 20 … 80 0,8 … 1,1 ±0,5 1,25 ±0,5 0,7 … 1,0 + 0,35 … 0,5 |
|
Plant output, pc/h |
2000…11000 |
The technological process of rolling has been designed by The VNIIMETMASH Stock Holding Company.