Skin Pass Rolling Tension Leveling Mill Line 4Hi Skin Pass 0.2-1.5 x 1300

Introduction

• Skin Pass Mill:The cold-rolled and annealed strip steel is flattened by rolling to obtain high-quality plate shape and improve its mechanical properties.The skin pass rolling mill can be 2Hi, 4Hi rolling mill, the thickness reduction of sheet metal is a little with less rolling pressure.
• The multi roll straightening machine: In order to meet the subsequent processing requirements, various straightening methods are used in the factory. The multi roll straightening machine is widely used. After passing through this straightening machine, the thin plate does not stretch itself, but only turns the large waves into small waves, making the surface of the plate almost flat. For plates with a thickness less than 0.8mm, the multi-rolls straightener is not so effective.
• Tension Leveler( stretching bending straightening machine) can simultaneously form longitudinal and transverse deformation of thin plates, thereby fully improving the flatness and material properties of thin plates, greatly enhancing the technology of thin plate straightening. Due to the bending stress generated by bending, the tension is greatly reduced. Only 1/3 to 1/5 of the tension required for pure stretch straightening is needed to achieve the same straightening effect. Moreover, the straightening effect is the best.

Work process:

Coil loading → uncoiling → coil head & tail cutting → seam welding → tension S-roller → anti wrinkle roller →4 Hi Skin Pass Mill → anti wrinkle roller → thickness gauge →Tension Leveler→ tension S-roller → oiling → shearing → Recoiling → Coil unloading

Parameters:

• Material: Plain carbon steel
• Yield strength σ S ≤ 350 MPa, tensile strength σ b ≤ 450 MPa
• Material specification:0.2～1.6×1300 mm
• Elongation:0.4～2.0%(dry type)  1.0～5.0%(Wet type)
• The tolerance of the raw cold rolled annealed coil sheets meet the national standard
• Coil sheet material specification:
• Max coil outer diameter:2100 mm,inner diameter:Φ508(Φ610)mm
• Max coil weight:27t
• Finished product:
• Coil inner diameter:Φ508mm,max coil weight:15t
• Max rolling force:6000 KN
• Skin pass tension: 120 KN
• Skin pass speed:≤200 m/min
• Uncoiling/Recoiling speed:≤200 m/min
• Uncoiling/recoiling tension: 30/40 KN
• Recoiler mandrel expansion range:Φ508～Φ485mm(Φ610～Φ590mm)
• The mill passline height:1000 mm
• Feeding direction:Customer decides
• Total installation power:DC 1240kW,AC 75kW
• Mill land area:21×11×5 m(length, width and height)
• Only the skin pass mill is high, other units below 2.5m height

Composition: