Tube Mills

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Strip Entry Section

Comprises equipment at start of any Strip Processing Line like Tube Mills, Roll Forming Lines, Cut to length Lines, Slitting Lines, Press Feed Lines, Annealing & Pickling Lines etc.

Typically this section includes Coil Storage Ramps, Coil Cars, Single / Double Mandrel Uncoilers, Coil Opener, Feeder Levellers cum Pinch Rolls, Strip Joiners, Strip Accumulators in a very wide range of designs best suited to the requirement of main processing lines. Our entry section facilitate continuous operations of very narrow & wide, thin & thick coils at high speeds using optimum manpower with minimum skill set.

COIL CAR

Located at the entry of the line. This unit has an important function of quickly loading the Coils over the Uncoiler Mandrel. Depending upon the size of the line, Coil Cars can be of various capacities. They can be fully automatic or push button controlled. In case of Tube Mills with high speeds, coil cars with pusher & ramps can be offered with coil cars loaded with multiple coils.

Coil Size Range mm (OD x Width x ID) Coil Weight (Ton) No of Coils
2000x278x508 5 Single
2000x400x508 7Single
2000x528x508 / 610 10 Single
2000x688x508 / 610 15 Single
1800x1520x508 / 610 25 Single
2000x1600 / 528 / 278x508 / 610 30 Single / Three / Six
2200x2000x762 40 Single
2000x688 / 528x508 / 610 60 Four / Six

UNCOILER AND COIL OPENERS

Uncoilers are very robust equipment to continuously pay off strip material at very high speeds. They are Single/Double expanding mandrel types depending upon the size of coils. These equipment are designed to feed coils up to max. 500 M/min suiting the accumulator fill speeds maintaining a tension using sophisticated braking system. The equipment can be fully automatic or push button controlled depending upon line specifications. Usually swivel type double mandrel uncoilers are recommended for coil weights up to 10 MT. coil openers are designed to open the coil from both top and bottom. They comprise of driven Snubber rolls and peeler blades. Uncoilers use various type of coil supports to avoid top layers falling off.

Coil Size Range(mm)OD X Width X ID Coil Weight. (Ton) Type of Uncoiler Mandrel Expansion Mandrel Drive
2000x100x508 2.0 Double Swivel Hydraulic / Manual Un Driven
2000x200x508 3.6Double Swivel Hydraulic / Manual Un Driven
2000x278x508 5.0 Single / Double Swivel Hydraulic Driven with opener
2000x400x508 7.0 Single / Double Swivel Hydraulic Driven with opener
2000x528x508 / 610 10.0 Single / Double Swivel Hydraulic Driven with opener
2000x688x508 / 610 15.0 Single Hydraulic Driven with opener
1800x1520x508 / 610 25.0 Two opposite Mandrels Hydraulic Driven with opener
2000x1600x508 / 610 30.0 Two opposite Mandrels Hydraulic Driven with opener
2200x2000x762 40.0 Two opposite Mandrels Hydraulic Driven with opener

LEVELLERS

For efficient strip joining the strip ends must be flattened to remove the coil set. Levellers can be with threading drive for coil ends flattening, continuously driven with variable speed or idler type for continuous operation generally required for heavier thicknesses. The equipment features driven pinch rolls & driven 5 or 8 rolls for tube mill applications. For lower thicknesses top pinch / leveller rolls are hydraulically lifted for smooth coil entry. For heavier thicknesses the bottom rolls are lowered.

Minimum Strip Size (mm) Maximum Strip Size (mm) No of Leveller Rolls Type of Drive
30 x 0.5 100 x 3.5 Five Threading
39 x 0.6 250 x 3.5Five Threading
49 x 0.7 278 x 4.0 Five Threading
104 x 1.2 400 x 6.3 Eight Threading
150 x 1.2 528 x 7.1 Eight Threading
278 x 1.6 688 x 8.2 Eight Threading
280 x 3.2 1020 x 10.0 Eight Threading
750 x 1.6 1600 x 7.1 Five Threading / Un Driven
1000 x 4.5 2000 x 20 Eight + Eight Back Up Driven

STRIP JOINERS

Leading & trail end of successive coils must be joined quickly to enable continuity of line. Depending on the strip size & physical properties TIG or MIG welding process Is adopted. The machine is suitable for Carbon Steel, Stainless Steel, Alumunium, Copper and Brass. The machine is combination of UP Cut / Down Cut shear and automatic welding system. The weld bead can be manually removed or through an automatic bead remover, generally employed for heavier thickness on MIG welds. For lighter thickness with TIG welds, Bead Planers can be offered.

Minimum Strip Size (mm) Maximum Strip Size (mm) Shear Type Welding Type
30 x 0.5 250 x 3.0 Pneumatic UP cut TIG
39 x 0.6 250 x 4.0Hydraulic Scissor TIG/MIG
49 x 0.7 305 x 5.0 Hydraulic Scissor TIG/MIG
104 x 1.2 400 x 6.3 Hydraulic Scissor MIG
150 x 1.2 528 x 7.1 Hydraulic Scissor MIG
278 x 1.6 688 x 8.2 Hydraulic Scissor MIG
280 x 3.2 1020 x 10.0 Hydraulic Roller Shear Double MIG
750 x 1.6 1600 x 12.0 Hydraulic Roller Shear Double MIG

Horizontal Accumulator

Tube Mills

Nanoway Tube Mills are designed for high speeds, quick changeovers, precise OD tolerances, high material yields, less manpower & lower power cost for following applications.

  • Commercial grade tubes ( Black & Galvanized for water / gas usages)
  • Precision grade tubes ( Bicycle, Furniture, Automotive, general engg. Usages)
  • API grade tubes (API 5 L up to X 70 grade, PSL 1 & PSL 2)
  • Stainless Steel tubes ( H. F. Welded for decorative, Industrial, Structural usages)
  • Fencing / conduit tubes ( Using pre galvanized strip)
  • Heavy T / D ratio tubes ( Machine structural usages)
  • Low T / D ratio tubes ( Auto motive, Furniture, general engineering usages)

Tube Mill is divided into Forming, Welding, Water Cooling & Sizing Sections. The forming employs W bending for precise formation & Fin Passes to present well prepared edges for strong welds. Drive section employs helical & bevel spiral gear boxes for higher power efficiencies enabling low power cost. The welding section comprise of seam Guide for 12’ O Clock position of strip edges, varieties of Squeeze Rolls in 2, 3, 4 & 5 Rolls configuration depending upon size range. Out side bead Scarfer are double tool type using multi faced throw away tips or rotary type using segmented Tips for flushed inside scarfing. All Mills are having facility for integrating customer supplied inside bead scarfers. Bead Winders for tight winding of out side scarf & Iron Rolls for ironing the scarf portion of the tubes are also provided. The sizing section including 2 Roll driven, 4 Roll driven, Idler & Turks head stand are employed for precisely maintaining the OD tolerance, producing non circular shapes & improving surface finish of tubing. Centralized lubrication system for gear boxes are used as required

STANDARD TUBE MILLS RANGE

Model Tube OD (mm) Tube Thickness (mm)
Max Line Speed (m / min)
Material
Carbon Steel Stainless Steel
NTM - 25 S 9.5 - 25.4 0.5 - 1.6 150
NTM - 38 S 12.7 -38.1 0.6 - 2.5 150
NTM - 50 S 12.7 - 50.8 0.7 - 3.2 150
NTM - 75 S 19.05 - 76.2 0.8 - 3.6 150
NTM - 90 S 21.3 - 88.9 1.6 - 5.4 130
NTM - 125 S 33.4 - 127.0 2.0 - 6.3 120
NTM - 160 S 60.3 - 168.3 2.6 - 7.1 80 --
NTM - 220 S 88.9 - 219.3 3.0 x 8.2 60 --
NTM - 320 S 114.3 - 323.8 3.2 - 10.0 40 --

SPECIAL TUBE MILLS RANGE (LOW T/D)

Model Tube OD (mm) Tube Thickness (mm)
Max Line Speed (m / min)
T/D Range Remarks
NTM - 25 L 6.3 - 25.4 0.25 - 1.0 150 0.01 - 0.10 Stretch Reducing Mill
NTM - 38 L 9.5 - 38.1 0.25 - 1.0 150 0.01 - 0.10 --
NTM - 50 L 12.7 - 50.8 0.3 - 1.2 150 0.01 - 0.08 --
NTM - 75 L 19.05 - 76.2 0.4 - 1.6 150 0.01 - 0.08 Including Full Hard Material
NTM - 100 L 25.4 - 101.6 0.5 - 2.0 130 0.01 - 0.08 Including Full Hard Material
NTM - 125 L 31.75 - 127.0 0.6 - 2.5 110 0.01 - 0.08 --
NTM - 220 L 88.9 - 219.3 1.2 - 4.5 80 0.01 - 0.08 --

SPECIAL TUBE MILLS RANGE (HIGH T/D)

Model Tube OD (mm) Tube Thickness (mm)
Max Line Speed (m / min)
T/D Range Remarks
NTM 50 H 15.88 - 50.8 2.0 - 7.1 100 0.05 - 0.20 --
NTM 90 H 33.4 - 93.0 2.5 - 10.0 80 0.05 - 0.20 --
NTM 160 H 60.3 - 168.3 3.6 - 14.2 60 0.05 - 0.20 --

FLYING CUT OFF

The flying saw cut off machines are designed to cut continuously produced tubing into predetermined lengths precisely. Depending upon the size range of the tube mill the cut off machine could be a cold saw or an improvised friction saw . Irrespective of the cutting method the flying saws use AC servo system accelerators using slip free timing belts or precise double / single rack and pinions. These accelerators are programmed to operate like a pendulum to facilitate jerk free motion imparting long life to the mechanical moving parts. The machine employs variable home position ensuring tubes being delivered upto the Run Out Table.

COLD SAWS

The flying cold saws use HSS or Carbide tipped blades with user friendly software and HMI providing various options of cutting parameters to the operator. The machine thus comes with a host of cutting parameters with guidelines enabling the operator to choose the correct cutting speed, varying feed rates for smooth and burr free cutting through various sections of the tube cross sectional area.

MODEL TUBE O.D (mm) TUBE Thickness (mm) Max. Line Speed (mm) Cutting Method
NCS - 50 12.7 – 50.8 0.6 – 3.2 150 HSS Blade
NCS - 90 21.3 – 88.9 0.7 – 4.0 130 HSS Blade
NCS - 90 S 21.3 – 88.9 1.2 – 5.4 130 HSS/Carbide Tipped Blade
NCS - 114 33.4 - 114.3 1.2 – 4.0 120 HSS Blade
NCS – 114 S 33.4 – 114.3 1.6 – 6.3 100 HSS/Carbide Tipped Blade

Friction Saws

The flying friction saws are used for larger diameter mills and have been improvised to minimize the burr being produced during friction cutting. This involves improvement in blade design and better control of cutting parameters. Below standard friction saw models are available and thickness suitable for heavy or low t/d ratio mills can be covered in these variants.

MODEL TUBE OD (mm) TUBE Thickness (mm) Max. Line Speed (mm)
NFS 125 33.4 – 127.0 1.6 – 6.3 120
NFS 160 60.3 – 168.3 2.6 – 7.1 80
NFS 220 88.9 – 219.3 3.0 – 8.2 60
NFS 320 114.3 – 323.8 3.2 – 10.0 40

RUN OUT TABLES :

Driven run out tables are also an important section of the mill and are designed to clear the tubes faster than the mill without damaging the bright surface. Facility is provided for dumping good and bad tubes in opposite directions.