Straight Seam Tube Mill For Carbon Steel Strip

1.Product overview

1.1 This is a special equipment for the manufacturing of straight seam tube (①25~① 90 mm,δ 1.2~4.0 mm),square tube and irregular tube (δ≤3.0 mm).The whole equipment includes devices from discharge rack to cut-off saw,and the manufacturing speed could be adjusted in certain range of the diameter and wall thickness.

 

1.2 Applicable material:

(1)Hot-rolled or cold-rolled strip steel

(2)Material type:low carbon steel,low alloy steel

(3)Strip thickness:1.2～4.0 mm

(4)Strip width:80～280 mm

(5)Internal diameter of coil:①450～550 mm

(6)External diameter of coil:D800～1500 mm

(7)Coil weight:≤2500 kg

1.3 Size rang of tube

(1)OD:D25～90mm

(2)Wall thickness:1.2～4.0 mm(for square tube and irregular tube,≤3.0 mm) (3)Length:4～8 m

1.4 Products (steel) production process:

Raw materials (strip steel) →discharge →cut of the head and tail and butt weld → storage silo → no power leveling → shape rolling→high-frequency welding→ remove seam outside burr sizing →removal of the burr outside →cooling →sizing→ coarse correction → cut → straight tube

Rolling speed: 20 ~ 60 m/min. (select different speeds with different diameter and wall thickness)

 

1.5 High-frequency equipment Configured: 300KW (solid)

 

1.6 User configuration items: (for reference) (1) Machinery space occupied: 60 m × 5 m

 

(2) Electrical equipment space occupied: 6 m × 4 m

(3) Foundation requirement (see base map provided by supplier)

(4) 2 crane of 10 ton

(5) Power:

(a) Motor of the equipment: 160 KW +22 KW +15 KW×2 = 212KW (b) High-frequency equipment: 300KW (solid)

(6) End-connected shearing machine and welder. (Market purchased)

(7) Blade used in tracking saw (according to the instructions, and the number determined by users)

(8) 1 magnet bar for tube welder (purchase according to tube size)

(9) 1 high pressure pump for cooling tube machine sets with the diameter of 3 inches and the head of 6 m.

(10) 1 cooling pond for tube machine with the volume of 30 cubic meters, tubes, valves, etc. (the type and the number determined by on-site installation).

(11) Circuit of the equipment. Lines must get into the distribution cabinet of plant room before reaching the equipment. Units must be connected to control sets and buttons station (the type and the number determined by on-site installation).

(12) 1 high-frequency unit which could be laid on the ground or loft. (13) 1 air compressor. (Market purchased)

 

2. Description of major equipment

2.1 Discharge rack:

Structure: bilateral 360-degree rotation and manually tensioner. Its role is to turn the volume to meet the alternative feeding of strip and to ensure the smooth entry into the storage silos.

Scope:

Strip width: 80 ~ 280mm

Strip thickness: 1.2 ~ 4.0mm

Internal diameter of coil: Φ450 ~ 550mm

External diameter of coil: Φ800 ~ 1500mm

Coil weight: ≤ 2500kg

 

2.2 Shear welder: (market purchased by users)

Its role is to cut the head and tail of two strips, weld and flatten the seal.

 

2.3 Storage silos:

Its main function is to store enough strip for the main machine before welding to ensure continuous production during the time of conveying strip.

(1) Structure: cage-plate weldment with automatic feeding and discharging devices.

(2) Adjustment: screw for manual adjustment

(3) Storage capacity: 150-300m.

 

2.4 Host of forming, welding and sizing:

2.4.1 Feeding and leveler device:

The body is equipped with a seven-roll passive straightening and a pair of guide rolls, which are mainly for flattening the strip before entering the unit.

2.4.2 Host for forming:

Its main role is to shape the strip and control the weld.

A. Horizontal roll rack:

(a) Quantity: eight

(b) Structure: 45 # steel forgings, double-column gantry, side-out for roll. (c) Diameter of horizontal roll axis: Φ80mm, material 42CrMO.

B. Vertical roll rack:

(a) Quantity: nine

(b) Type: Passive transmission

(c) Diameter of vertical roll axis: Φ45mm, material 45 # steel.

C. Seven sub-power box

(a) Structure:

Spiral bevel gear leaves and cylindrical gear.

(b) Material: cabinet: QT50; spiral bevel gear leaves: 20CrMnTi; cylindrical gears: 40Cr; output and input shaft: 40Cr.

(c) Power transmission: 14 auto universal driveshaft.

D. Tow Installed bases (body):

(1) Host machines of orientation, extrusion welding and planning scar: (a) 1 guide roller for the orientation of the weld.

(b) 1 squeeze roller for the control to achieve desired weld.

(c) Outside the weld planer frame 2 group, for outer tube burr gelling. (2) 1 set of cooling water.

2.4.5 Host machine of sizing:

Mainly for the accurate shaping of steel tube and controlling the size.

(a) 5 horizontal roller rack, 5 vertical racks, 5 sub-power boxes and 12 cardan shafts. (Structure resembles forming the host)

(b) Rough straightening device:

It is mainly for the coarse straightening of fine-molded steel.