Equipment Essence: The "Welding Hub" for Metal Mesh Forming
The welded wire mesh machine, also known as metal mesh welding and forming equipment, is specialized machinery that welds metal wires (such as steel bars, steel wires, aluminum alloy wires, etc.) into meshes at preset intervals and specifications through resistance welding, arc welding, and other processes. Its core function is to achieve precise welding at the intersection points of wires. The finished mesh has a stable structure, uniform strength, and high production efficiency. The processing range covers wire diameters from 2 to 16mm, and the mesh size can be flexibly adjusted between 50 and 500mm. It is core equipment for producing metal mesh products in fields such as construction, transportation, and agriculture.
Core Technical Principle: Four Systems Working Together to Achieve Precise Welding
The working process of the welded wire mesh machine follows a closed loop of "wire feeding – positioning – welding – forming," relying on the coordinated operation of the mechanical, electrical, welding, and control systems. Using the mainstream resistance welding machine as an example, the technical principle is as follows:
Wire feeding and positioning system: Composed of an active wire feeding roller and a guiding mechanism, driven by a servo motor to rotate the roller and precisely convey the wire rods and wires to the welding station at preset intervals. The CNC model is equipped with a high-precision encoder, which achieves synchronous positioning of longitudinal (warp) and transverse (weft) wires. The positioning error is controlled within ±0.5mm, ensuring mesh size consistency.
Welding execution system: With the electrode assembly as the core, divided into upper and lower rows of electrodes. When the wire is in position, the electrodes are pressed and clamped under cylinder drive, while a high-frequency current passes through. The current at the contact point generates resistance heat, causing the area to melt instantly to form a molten core. Afterward, power is cut off and the weld is cooled to complete the joint.
Transmission and conveying system: Composed of chains, gears, and conveying mesh belts, continuously delivering welded mesh sheets. Equipped with a mesh cutting device, it can automatically cut to preset lengths, realizing integrated "welding–cutting" production. The transmission speed, adjustable by a frequency converter, can reach up to 1.5m/min to meet different mesh thickness requirements.
Application Scenarios and Industry Value: Basic Equipment Across Multiple Fields
The application of welded wire mesh machines has expanded from construction to transportation and automotive industries. Technological upgrades directly promote efficiency gains and product improvements in downstream sectors.
Construction engineering: Producing welded mesh for floor slabs and bridge pavements replaces manual binding, increasing efficiency fourfold and reducing steel bar loss from 3% to less than 0.5%, fully meeting GB/T 1499.3-2010 standards.
Transportation infrastructure: Manufacturing highway guardrail nets and railway isolation nets. The impact resistance of robot-welded mesh has increased by 20%, meeting the Asia-Pacific region's 6.8% annual infrastructure investment growth demand.
Automobile manufacturing: Producing aluminum alloy welded mesh for lightweight vehicle bodies. Its application ratio in vehicle structures rose from 12% in 2020 to 18% in 2022, driving demand for dedicated pulse welding machines.
Irreplaceable Industry Value
Efficiency innovation: Fully automatic welded wire mesh machines are 8–10 times more efficient than manual welding, with a single machine producing over 300 m² daily.
Quality assurance: Intelligent control enables precise matching of welding parameters. The compliance rate of weld tensile strength is ≥99%, compared to 85% for manual welding.
Cost optimization: Modular design reduces production line switching time by 70%. IoT-based maintenance lowers failure rates by 40%, cutting overall operating costs by 25%.
Operation, Maintenance, and Fault Handling: Ensuring Stable Equipment Operation
Standardized Operation and Maintenance Procedures
Pre-startup inspection: Confirm that the power supply voltage is stable (380V±5%). Check the water and lubricating oil levels of the cooling system, clean the oxide layer on the electrode surface, and calibrate the concentricity of the wire-feeding mechanism and welding electrode.
Parameter settings: Adjust the welding current (approximately 800–1000A for a 6 mm diameter wire), welding time (0.2–0.5 s), and electrode pressure (5–8 MPa) according to the wire diameter. A test weld verification is required before the first production run.
Daily maintenance: Clean welding slag and dust inside the equipment every day. Check electrode wear weekly (replace if wear exceeds 2 mm). Add lubricating oil to the transmission chain monthly. Calibrate the accuracy of the visual inspection system quarterly.
Typical Fault Diagnosis and Solutions
Faults in welded wire mesh machines are mostly concentrated in the welding, transmission, and control systems. Common problems and solutions include:
| Fault Phenomenon | Core Cause | Professional Solution |
|---|---|---|
| Weak solder joints / loose welds | Unstable current, insufficient pressure, or too short welding time | Check power supply stability, adjust electrode pressure to the standard range, and extend welding time by 0.1–0.2 s |
| Severely deformed weld points | Welding time too long, current too high, or insufficient electrode cooling | Reduce welding current by 10–15%, shorten welding time, and clear cooling system blockages to improve heat dissipation |
| Equipment overheating and shutdown | Continuous overload operation or cooling fan failure | Allow a 30-minute rest after shutdown, check the cooling system, replace faulty fans, and reasonably plan working hours |
| Rapid electrode wear | Excessive material hardness or improper parameter settings | Replace with tungsten alloy electrodes suitable for high-hardness materials, reduce welding current peak value, and optimize pulse frequency |
| Control system malfunction | Electrical component damage, circuit aging, or software failure | Replace damaged relays/contactors, renew aged wiring, and update the control system firmware |
