Tension Leveler Skin Pass 2Hi 4Hi Rolling Mill Line For Steel Coil Stainless Steel Coil

Tension Leveler Skin Pass 2Hi 4Hi Rolling Mill Line for Steel Coil Stainless Steel Coil

Introduction

• 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.
• 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.

Advantages of Tension Leveler:

1. Good flat sheet shape can be obtained by stretch bending and multi rolls straightening, the wave edges, wave shapes, and slight camber bends on the sheet surface can be completely eliminated, greatly improving the flatness of thin plate.
2. Beneficial for improving the anisotropy of sheet material. The yield limit of deep drawn low-carbon steel sheets often shows anisotropy in both longitudinal and transverse directions. Therefore, during deep drawing processing of thin plates, uneven thickness of each part due to different extensions can cause skirt like lace defects in the punched part, resulting in increase in waste rate. After straightening by stretch bending, this situation will be greatly improved.

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:0.2～2.0×1000 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:20t

Finished product:

• Coil inner diameter:Φ508mm,max coil weight:15t
• Max rolling force:6000 KN
• Skin pass tension: 120 KN
• Skin pass speed:≤500 m/min
• Uncoiling/Recoiling speed:≤500 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:21×10×5 m(length, width and height)
• Only the skin pass mill is high, other units below 2.5m height

Composition: