Due to the harsh working environment of the ship, the hull shell is subject to chemical corrosion of seawater, electrochemical corrosion and corrosion of marine organisms and microorganisms; the hull is subjected to large wind and wave impacts and alternating loads; the shape of the ship is complicated by processing methods, etc. Steel for hull structure is strictly required. First of all, good toughness is the most critical requirement. In addition, high strength, good corrosion resistance, weldability, forming properties and surface quality are required.
Shipbuilding Steels Our hot rolled shipbuilding steel is produced in accordance with the relevant Classification Society, examples of which include Lloyds Register and Det Norske Veritas.
Our steel products include steel shipbuilding plate, fabricated steel sections and floor plate for decking. We can also supply bulb flats for plate stiffening, structural steel angles and inverted angles.
Our plates are supplied under the ASTM/ASME specification (ASTM A131 / ASME SA 131) which is the standard specification for Structural Steel for Ships. We offer higher strength shipbuilding steels as standard .High strength steels offer significant cost advantages by reducing the weight of the structure in comparison to the steel used.
The plates are suitable for use in the construction of container ships and large cargo freighters as well as commercial shipping lines such as luxury cruise ships and ferries. Supply options include heavy plates, surface treated plates and pre-fabricated sections. In most cases, the steel can also be supplied as hot rolled coils or cut into lengths (sheets).
These high yield materials are commonly used in the construction of hulls and superstructures for large shipping vessels. The grades are exclusively for shipbuilding use as set out in the standard.
Ship Building Steel Plate,Shipbuilding Steel Plate,Marine Steel Plate,Shipbuilding Plate Shandong Guanzhou Iron and Steel Group Co., Ltd. , https://www.guanzhousteel.com
Address: Shangji Industrial Park, Xuchang, Henan, China Mobile: 0086 13271263010 Specification
GW42D
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Bending Capacity
II Rebar
≤ø40mm
III Rebar
≤ø36mm
Working Dish Size
ø360mm
Spindle Speed
High 10rpm
Low 7rpm
Motor Power
3kw(3 Phase)
Voltage
380v
Weight
340kg
Dimension
910*730*810
Motor Optional
220v/415v/440v
50HZ/60HZ 
GW42D Automatic Bar Bending Machine
I. Advantages and Features:
The GW42D Automatic Bar Bending Machine is a high-performance equipment designed for construction sites. It has been carefully engineered to ensure durability, efficiency, and ease of use. Key advantages include an integrated enclosed housing that ensures even load distribution and prevents deformation. The machine features high-quality carbon steel components, including the gear shaft and main spindle, which are heat-treated to meet strict quality standards. The main spindle is supported by high-capacity ball bearings, ensuring smooth operation and long service life. The working disc and square bar are made from premium carbon steel, while the pile head and tip are made from alloy steel with high hardness treatment, ensuring reliable performance over time. The brake motor, adjustable square bar, and bolt-type positioning disc allow for accurate angle adjustments and self-return functionality. Additionally, the machine requires minimal maintenance due to its oil-filled design, reducing the need for frequent refueling. The manual/automatic switching function with a brake motor enhances user convenience.
II. Main Technical Parameters:
Model: GW42D
Bending Diameter: Φ6 - Φ40 mm (for plain round bars ≤450 MPa), Φ6 - Φ36 mm (for deformed bars)
Working Disc Diameter: 360 mm
Motor Power: 3 kW (3-phase)
Spindle Speed: High speed 10 rpm, Low speed 7 rpm
Weight: 340 kg
Overall Dimensions: 910 x 730 x 810 mm
Optional Motor: 220V / 415V / 440V, 50Hz / 60Hz
III. Pre-Operation Preparation:
3.1. Inspection
(1) Check if the outer packaging is damaged and if any parts are damaged and may affect normal operation.
(2) Ensure all nuts, bolts, and screws are securely fastened.
3.2. Installation
(1) Choose a flat and stable ground, keep the machine level.
(2) Leave enough space for raw material storage and transportation.
(3) Ensure the power supply voltage is within the standard range (+10%) and has proper grounding.
(4) After moving the machine to the work site, connect the power and perform initial debugging.
(5) Plug the foot switch into the electric door socket.
3.3. Lubrication
Open the fuel cap on the table top and add CKC68 gear oil to two-thirds of the oil window (or about 10 kg).
V. Debugging Procedure:
4.1. After completing the above steps, connect the power supply. Perform pre-commissioning when the power indicator light turns on.
(1) Turn on the OPEN CIRCUIT, MOTOR FORWARD AND REVERSE BUTTON, and the power will be connected.
(2) Click the START button; the motor should rotate forward. If not, switch the OPEN CIRCUIT, MOTOR FORWARD AND REVERSE BUTTON to the other side to change the direction.
(3) Switch the MANUAL/AUTO BUTTON to AUTO, insert the angle positioning pin into the holes on the working disc. Step on the foot pedal, and the motor will start, causing the working disc to turn. When the angle positioning pin reaches the reverse position switch, the motor will reverse. If it does not, check the circuit and ensure the pin touches the switch.
(4) The ANGLE TRANSFORMATION SWITCH allows for different bending angles. For example, set the angle positioning pin to 90°, bend the steel, then switch the ANGLE TRANSFORMATION SWITCH and bend to 135°.
(5) Switch the MANUAL/AUTO BUTTON to MANUAL, press the START/FORWARD or MANUAL REVERSE button, and the machine will operate continuously. If you just click the button, the machine will cycle on and off.
2. Load Testing
(1) Select the appropriate center pile head, pile head, and sleeve based on the steel size. Place the positioning pile head, keep-off pile head, and striker plate according to the bending direction.
(2) The bending radius depends on the steel's diameter and tensile strength.
(3) Place the steel on the working disc, adjust the striker plate to press against the steel, and adjust the square bar to touch the center pile head. For safety, place a keep-off pile head beside the square bar.
(4) At least two people should assist when bending long steel bars.
(5) No one should be in the working radius area or on the non-pile head side of the machine.
(6) Press the START/FORWARD button to begin bending. (For automatic machines, always insert the angle positioning pin to avoid continuous operation and potential accidents.)
(7) Stop the machine immediately in case of malfunction and restart after resolving the issue.
(8) Do not bend bent or irregular steel bars to prevent accidents.
VI. Maintenance:
1. Change the lubricating oil three months after using the new machine. Replace it annually thereafter. Oil changes are best done while the engine is warm.
How to Change Oil:
Loosen the drain plug under the reducer, drain the old oil, restart the engine to remove residual oil, tighten the plug, and fill with new gear oil.
2. Choose the right pile head and sleeve based on the steel's strength and diameter. Avoid using small positioning pile heads for large-diameter steel.
3. Clean the working disc at the end of each shift and apply lubricating grease. Do not oil or grease the machine while it is running.
4. Do not replace the center pile head, keep-off pile head, or striker plate.
5. Apply anti-corrosive grease to the working disc and store the machine in a dry place for long-term storage.
Quick Wear Parts List:
Item
Model
Quantity
Installation Site
Deep Groove Ball Bearing
6206
2
Input Axis
Deep Groove Ball Bearing
6307
2
Intermediate Shaft
Deep Groove Ball Bearing
6215
1
Upper of Spindle Axis
Oil Seal
30×52×10
2
Input Axis Cover
V-belt
A#1422
3
Belt Pulley
Accessories Included:
GW42D
No.
Item
Quantity
1
Axis Sleeve 1
1pc
2
Axis Sleeve 2
1pc
3
Axis Sleeve 3
1pc
4
Axis Sleeve 4
1pc
5
Central Axis Φ18 ×Φ40
1pc
6
Central Axis Φ25 ×Φ40
1pc
7
Central Axis Φ35 ×Φ40
1pc
8
Central Axis Φ43 ×Φ40
4pcs
9
Blocking Plate
1set
10
Allen Wrench 6/8/10/12
Each 1pc
11
Foot Pedal
1pc
12
Instruction Book
1set
Steel Rebar Bender, Automatic Bar Bending Machine (GW42D)
Model NO.: GW42D
Dimension: 910*730*850mm
Size After Packing: 1100*950*1000mm
Application: Machinery & Hardware
Type for Fold-Bending Machine: Automatic Bar Bending Machine
Trademark: YYTF
Transport Package: Wooden Case and Iron Frame
Specification: SGS, ISO
Origin: Xuchang, China
HS Code: 8462299000
Steel Rebar Bender, Automatic Bar Bending Machine (GW42D)