The effect of hot dip galvanized production line inlet tension? 1) the tension of uncoiling and the tension of uncoiling are mainly to prevent the elastic rolling hard coiling from loosening when uncoiling, and the horizontal deviation occurs on the shaft of the uncoiling machine, forming a...Send InquiryChat Now
The effect of hot dip galvanized production line inlet tension?
1) the tension of uncoiling and the tension of uncoiling are mainly to prevent the elastic rolling hard coiling from loosening when uncoiling, and the horizontal deviation occurs on the shaft of the uncoiling machine, forming a trumpet shape, which affects the steel belt entering the production line along the Central Line.
2) the cleaning period of tension, the general need larger tension, because of the cleaning section there are a lot of squeeze roller, scrubbing of silver, regardless of is the main movement or from sports, they have certain force on steel strip, unless its axis and the line the center line of the vertical or horizontal windage is larger, can cause with the power of the steel strip production line direction inconsistent phenomenon, there will be a lateral force component, the steel strip along the surface of the roller to the lateral sliding, serious when being part of the casing scratches and accident cause broken belt.To avoid this kind of accident, in addition to the strict detection of the dry silver, the water level of the scrubbing roller, the vertical degree, is appropriate to increase the tension.
3) sleeve tension.The tension of horizontal sleeve is too small, which will not only lead to the deviation of steel belt, but also cause serious sagging of steel belt. When the swing arm of the sleeve opens and closes, the steel belt will be scratched or even broken.Generally, the steel belt enters the furnace area after the horizontal sleeve, and the tension of the sleeve will affect the stability of the furnace area.
4) the effect of furnace area tension.The tension control of furnace area is the key and difficult point of galvanized wire, which is because the steel belt in the furnace must be heated above the recrystallization temperature range, and when the production line fails, the temperature of steel belt will be higher when the speed drops or stops.The tensile strength and plasticity of steel strips at 700-800c are extremely low.If the tension is high, even if the instantaneous tension caused by the tension fluctuation is too high, the steel belt will be broken causing parking.The effect of tension will also narrow the width of the steel belt. When the steel belt tension is fixed at 800 degrees centigrade, different steel belts have corresponding narrowing phenomenon.Under the same tension, the value of narrow width of steel belt in the inner zone increases with the increase of furnace temperature.Therefore, the tension in the furnace must be as small as possible to ensure the normal operation of the steel belt.But under normal circumstances, all can lead to narrow the width of the steel with a certain value, shall, must rely on choosing raw materials appropriate to increase the width of the rolling hard roll to make up for, furnace tension will affect the shape, tension after hours, the strip under the gravity of the sag, and the edge is not prolapse more obvious, in the high temperature of the bottom of the wave shape is aggravating, brings to the steel strip through the air knife difficult, also increased the difficulty of the straightening later.If the tension is properly increased, a small amount of plastic deformation can be produced at the central part of the steel belt at the temperature to offset the wave shape at the edge.