1. The basic shape of the neutral roll of the vertical edge rolling machine.
1）Flat roller.
2) conical roll.
3) Hole-type roll with flat or convex groove bottom surface.
4) hole-type roll with oblique groove bottom surface.
2. Rolling the special roll type method in adjusting the width.
(1) scallop-shaped roll widening.
(2) roll widening with staggered roll rings.
(3) with a central projection block roll widening.
(4) roll widening tapered roll widening with variable ring type projection block.
(5) large convexity roll widening.
(6) tapered roll widening.
3. Short hammer head widening presses are divided into.
1) start-stop type widening press.
2) continuous type widening press.
3) Swinging type widening press.
Features.
1)Start-stop terms presses: the workpiece remains stationary during work, positioning is precise, and clamping rolls prevent slabs and bending.
2)Continuous clause press: compression of the workpiece is synchronized with the advance of the work, short operating cycle, high efficiency and high surface quality of the working company part.
3)Swinging terms press: the above two advantages are combined.
4. Long hammerhead presses usually require one stroke for slab widening.
5. Destabilizing situations that tend to occur during the widening of the rolled parts.
Slab tipping, slab warpage.
Slab tipping prevention methods
(1) the use of hole-shaped rolls or tapered rolls with bottom cavity to prevent de-separation.
(2) Use tilting rolls to prevent the slab from rising.
Slab warpage prevention methods.
1) center support, two-end support and three-point support.
2）Take measures to prevent downward bending.
3）Two vertical rolls are placed at an angle.
6. Methods to reduce the amount of adjusting width cut.
(1)Use convex slab method.
(2) lubrication rolling method.
(3) back pushing slab rolling method.
(4) convex section rolling method.
(5) Rolling method using variable hole size.
(6) slab end preforming method.
7. Rolling process instantaneous speed changes in the influence of factors.
(1) the impact of rolling specifications on speed.
(2) the impact of roll changes on speed.
Factors influencing the instantaneous speed variation in the continuous casting process.
1) The effect of the change in the height of the liquid level of the intermediate ladle on the pulling speed.
2) the effect of changes in the water outlet through-flow cross-section on the pulling speed.
3) the effect of steel temperature changes on the pulling speed.
4) the handling of the billet during the transition process.
Post time: Sep-27-2022