I   Main technical specification

1,Raw material request

Material of strip:stainless steel strip , Austenitic (300 Grades) & Duplex

Strip OD:       φ900mm-φ1500mm

Strip ID:        φ508mm

Width:          39--80mm

Thickness:      1.0—2.0mm

Strip weight:     Max 1.5Mt (1500kg)

2,Pipe size:

Diameter:      φ12.5~φ25.4mm

Wall thickness: 1.0~2.0mm

3,Layout:

Form:      Separated type

Disposal:    Feeding from side (the location of control desk will be decided by customer)

II Technology process

Uncoiling->Leveling & Feeding->Forming unit-> Welding ->Outside seam polishing->Sizing unit ->Flying saw-> Run-out table

III Equipment List

IV Main structure

1,Double head Uncoiler

Configuration:             Hand rocker expanding drum, double drums;

Suitable inner Diameter:   φ508mm 

Outer Diameter of coil:    ≤φ1200mm

Width of metal strip:      39~80mm

Weight of coil:           ≤ 1.5 ton(1500kg)

Brake type:             Air drive, two phase brake

Conversion form:         Manhandled turning 180°

2,Forming and sizing unit I

2.1 Feeding device

Guiding stand-roller: a pair of guiding stand-roller after leveling roller, adjust by manual;

Leveling roller: using 7 sets of flat-roller to let strip introduce into machine smoothly; Leveling roller is non-power, base roller is fixed while upper roller is adjusting by bolt

2.2 Forming frame

(35# Precision cast steel with high    mechanical strength)

The principle of this machine is forming by base level-roller, and the rollers are double radius.

Forming request:

Round pipe:

OD:  φ12..5~φ25.4mm

Thickness: 1.0—2.0mm

2.3 Specification of forming frame:

 2.4 Requirement of forming frame

1) Set up one set (two frames) of vertical roll frames to avoid scratching on the surface of pipe billet

    2) There are over loading protectors at the top of upper roller shaft. It can protect flat roller and gearing device while over loading. No need to change new blotter.

    3) The structure of level mill frame is gantry type:

(open molding): 5(Five) racks

(closed molding):3(Three) racks

    4) The structure of vertical mill frame is slot type:

Double mill frame oriented, manual adjustment to opening and closing and centering

Equipped with vertical mill frame to adjust institution

5) Exchange mill frame type:Side pull type

6) Rack lubrication: vertical mill frame use grease lubrication in the end , equipped with oil nipple  

3  Drive system

The main forming and sizing unite I are linkage drived by same motor, each system’s motor drive the horizontal rollers by reducer gearbox , gear case(spiral bevel gear), transmission shaft; vertical roll without motor. Spiral bevel gear material is 20CrMnTi.

Main forming motor: 11KW

Gearbox lubrication: Thin oil steep and lubricate, there is a oil level showing outside of gearbox.

This mill’s spiral bevel gear is low noise, wear-resisting, high load function.

4,Welding system

1. 1.       Brand: Panasonic ,YC-400XT
2. 2.       Power:400
3. 3.    With water cooling system

5,Outside seam polishing

5.1 Two sets, each set including one polishing head

5.2  Beancurd sheets to polishing the pipe welding seem

5.3  Whole sealing spraying plastics shell

5.4  Main parts using corrosion-resistant material

5.5 With cooling system to cool the pipe seam.

Sizing

5.1 Sizing request:

Round pipe:

OD:  φ12.5~φ25.4mm

Thickness: 1.0—2.0mm

    5.2 Specification of sizing frame:

5.3  Requirement of sizing frame:

1)    Exchange rollers:Side pull type

2)    Adjustment of upper roller:Independent adjustment

3)    The structure of vertical mill frame is slot type, double vertical rollers oriented, manual adjustment to opening and closing and centering, Equipped with vertical mill frame to adjust institution

4)    Rack lubrication: Vertical mill frame use grease lubrication in the end, equipped with oil nipple.

6,Computer fly saw

Type:PC to fix cold fly saw without burr

Purpose:Confirm steel tube fixed length and off-position, and quickly start to cut off the equipment and operating line in the same speed.

  Keep the equipment cut up and operating line in the same speed, and cut up the steel tube.

Reset quickly;

Control method: The microcomputer control motor drive fly saw car through the reducer drive gear rack

Incise type:                 Metalsaw cutting

The maximum running speed:10m/min

Saw cutting pipe diameter and Thickness:   

Round pipe:

OD:  φ12.5~φ25.4mm

Thickness: 1.0—2.0mm

Cutting precision:            ±2mm

Cut lengths:                 3~12m

Blade spec.:                 φ275×32×1.8

Saw rotate speed:            80m/min

Saw cutting motor:            2.2KW

Pneumatic system:            0.4~0.7Mpa

7,Back mill frame rack

Rack type:  Adopt structural steel welded type

Elevation:   The same as bottom diameter of pipe roll

Roller form, material:  Supporting roller is vertical roller whose material is 45#hard chromium plating. It has long service life and won’t scratch the steel tube.

Turning direction:        The same as pipe heading.

8 ,Rollers

1,  Grade:   Cr12

2,  Hardness:58HB--65HB