0.15-0.45 × 1250 (mm) longitudinal cutting unit

Attachment 1 Technical Description and Parameters

1、 Overview

This unit is used to longitudinally cut cold-rolled galvanized steel strips and other metal strips according to a certain width specification, and then re roll the thick cut finished strip material into a coil under a certain tension. This unit has the characteristics of multiple cutting strips, high cutting accuracy, and high degree of automation.

2、 Technical parameters

1. Material: Cold rolled galvanized steel strip

2. Material thickness: 0.15mm~0.45mm

3. Belt width: 600mm to 1250mm

4. Inner diameter of raw material roll: Φ 500mm, Φ 600mm

5. Maximum outer diameter of raw material roll: Φ 1500mm

6. Maximum weight of raw material roll: 8T

7. Number of cuts:

When the thickness of the strip is δ=0.18-0.2mm, ≤ 40 strips

When the thickness of the strip is δ=0.23-0.25mm, ≤ 40 strips

When the thickness of the strip is δ=0.43-0.45mm, ≤ 40 strips

8. Cutting burrs:

When the thickness of the material is δ=0.15-0.45mm, ≤ 0.03mm

9. Maximum longitudinal cutting speed: 120m/min

10. Width tolerance of the cut strip: When the width is ≤ 60mm, it is ≤± 0.05mm

11. Narrowest cutting width: 15mm

12. Sickle bend: 1.5mm/m

13. Finished roll inner diameter: Φ 200mm

14. Maximum weight of finished roll: 4T

15. Maximum outer diameter of finished roll: Φ 800mm

16. Unit air source pressure: 0.5MPa (to be provided by the user)

17. Rated pressure of hydraulic control system: 10MPa

18. Unit installed capacity:~90kw

19. Unit space dimensions: length~19m x width~7m x height~2.0m

20. Unit operation direction: from right to left when the operator faces the unit

3、 Overview of Unit Equipment

1. Loading trolley

(1) It has the function of lifting and horizontal movement, which can easily guide the inner hole of the coil into the expansion and contraction tube of the unwinding machine;

(2) Horizontal movement is driven by hydraulic motors, while lifting is driven by hydraulic cylinders;

(3) Travel distance: 700mm;

(4) Carrying capacity: 8 tons.

2. Auxiliary support

(1) Auxiliary support is used to support the unwinding machine drum under load, improving the force on the drum spindle;

(2) The support adopts a connecting rod type and is driven by a hydraulic cylinder.

3. Uncoiler machine

(1) Type: Cantilever hydraulic expansion and contraction type, with center drive and pressure roller, the drum expansion and contraction is driven by oil cylinder;

(2) The uncoiler is equipped with a pneumatic butterfly brake device for emergency parking;

(3) Roll specifications: The nominal size of the basic roll is Φ 508mm × 1350mm, with a range of expansion and contraction from Φ 480mm to Φ 520mm. Additionally, a Φ 600mm nylon diameter increasing tile is included;

(4) Spindle: Material 40Cr, quenched and tempered treatment;

(5) Drive motor: R series reducer directly connected to 15Kw/4P AC variable frequency motor;

(6) There is a pressure roller device, and the lifting is driven by an oil cylinder. The pressure roller has no power.

4. Material roller

(1) To prevent scratches and abrasions of the material at the entrance loop pit;

(2) The feeding roller adopts a lightweight roller body wrapped in polyurethane rubber.

5. Loop 1

(1) The loop is used to match the speed difference between the unwinding machine and the disc cutter;

(2) Dimensions of the loop pit: length 3000mm, depth 2500mm, width 1600mm;

(3) The swing of the material plate is driven by a hydraulic cylinder;

(4) The surface of the sheet is equipped with scratch resistant non-metallic plates.

6. Disc cutter

(1) The guiding device utilizes vertical rollers or guide plates on both sides to guide the material smoothly into the disc cutter. The vertical rollers or guide plates on both sides are manually adjusted;

(2) By exchanging the combined spacer, the width requirements of the cut product can be flexibly changed;

(3) Cutter shaft lifting and movable memorial archway movement are both driven by motor and manual, and equipped with limit switch. When moving quickly, electric mode can be used, and manual mode can be used for fine adjustment;

(4) The fine adjustment of the upper blade shaft can be accurately observed by installing a dial gauge to measure the cutting amount. The blade shaft is designed with a keyway with a width of 20mm, and the blade pad is locked with dual mechanical nuts;

(5) Blade shaft specification parameters:

Blade shaft size: Φ 140 × 1400mm

Disc cutter: inner diameter of Φ 140mm, outer diameter of Φ 260mm, thickness of 5mm;

(6) Power unit: The R series reducer is directly connected to a 22Kw/4P AC variable frequency motor, and the power is transmitted to the upper and lower cutter shafts through a gear distribution box and universal joint;

(7) Disc cutter with sharpening core shaft: Φ 140 × 500mm.

7. Waste edge winding machine

(1) Located on both sides of the production line, it is used for centralized winding of edge materials after strip cutting;

(2) The waste edge winding machine ensures that all waste edges can be collected when the unwinding machine reaches its maximum raw material roll;

(3) The magnetic powder clutch can be used to adjust the winding tension according to different materials;

(4) Drive power: AC motor: 3Kw/4p (2 units).

8. Loop 2

(1) The loop is used to match the speed of the rolling cutter and the rewinder, and to buffer the length difference of various strip materials after cutting.

(2) Dimensions of the loop pit: length 3000mm, depth 6000mm, width 1800mm

(3) The swing of the material plate is driven by a hydraulic cylinder.

(4) The surface of the sheet is equipped with scratch resistant non-metallic plates.

9. Tension platform

The tension machine consists of two sets of fixed feeders, anti bounce rollers, tension pressure plates, reversing rollers, and material receiving plates;

(1) The front-end two feeders separate the strip material entering the tension table in advance to avoid overlap;

(2) The material pressing device prevents the material from jumping out of the separation plate during operation;

(3) The tensioning device consists of a set of hydraulic pressure plate tensioning devices, and the pressure can be accurately adjusted through a separate pressure regulating valve. The hydraulic cylinder specification is Φ 80 × 200mm (2 units);

(4) The tension table reversing roller is a polyurethane coated rubber roller with a diameter of Φ 300mm;

(5) Due to the large number of slitting strips, the width of the tension table channel is designed to be 1500mm.

10. Coiling machine

(1) The coiler separates the longitudinally cut strip material and harvests the strip coil;

(2) The coiler consists of a driving power, a toothed chain pair, a drum, a rotating oil cylinder, a distributor, and a base;

(3) The Φ 200mm drum is driven by a hydraulic cylinder for radial expansion and contraction, without a clamping mechanism, and can carry a maximum tonnage of 4 tons;

(4) The maximum outer diameter of the reel is Φ 800mm, and the length of the reel is about 1500mm;

(5) The hydraulic rotary arm type tape separator can automatically rise with the increase of the material roll;

(6) Spindle: Material 40Cr, quenched and tempered treatment;

(7) Drive power: R series reducer directly connected to 37Kw/4P AC variable frequency motor.

11. Unloading trolley

(1) The unloading trolley can be lifted and horizontally moved to send out the material roll;

(2) The movement of the car is driven by a hydraulic motor, and the lifting is driven by a hydraulic cylinder;

(3) Travel distance: 700mm;

(4) Load capacity: Max4 tons.

12. Pneumatic control system

(1) The gas source shall be provided by the user and the pressure shall not be less than 0.5Mpa;

(2) Gas consumption: 0.2 cubic meters per hour

13. Hydraulic control system

(1) The hydraulic system includes one pump station and one valve station;

(2) Rated working pressure of hydraulic system: 10Mpa;

(3) Control voltage of solenoid valve and electrical components: DC 24V;

(4) The hydraulic system uses transmission medium: N46 anti-wear hydraulic oil;

(5) Cooling method: forced air cooling;

(6) Hydraulic pump motor power: 11Kw/4P.

14. Electrical control system

(1) This unit adopts a variable frequency speed regulation system to drive the unwinding motor, shearing motor, and winding motor;

(2) The speed adjustment of each major single machine in the production line is completed on the main control panel. The adjustment is given by various potentiometers, and the emergency stop button can be pressed at any time to stop the entire line in case of any abnormalities during operation.

(3) The electrical control system consists of a control cabinet, a main operation console, and two handheld operation boxes (used to control the winding machine and the loading and unloading trolley).

(4) Unit uses power supply

Voltage: 380V three-phase five wire system, PE grounding wire, N neutral wire

Frequency: 50Hz ± 1%

Total power of equipment:~90Kw

(5) Equipment usage environment:

Environmental temperature: 5 ℃~40 ℃

Relative humidity: ≤ 85%

Altitude: ≤ 1000m