Product Specification

Automatic Multi-Head Resistance Spot Welding Machine for Steel Grating Production

A PLC-controlled multi-head press spot welding machine purpose-built for steel grating manufacturing. Unlike generic wire mesh welders, this equipment is engineered for the specific demands of grating production — heavy-duty bearing bars, precise cross-bar alignment, and consistent weld penetration required for industrial walkway grating, trench covers, drainage grating, and heavy-duty platform grating. With 40-200KVA power range, multi-head simultaneous welding, and automatic pneumatic pressure control, it delivers the productivity and weld consistency that grating manufacturers demand.

PLC controlled multi-head press spot welding machine for steel grating and industrial grating production.

Watch It Working

Key Advantages for Grating Manufacturers

1. Multi-Head Simultaneous Welding for Higher Throughput
Multiple welding heads operate simultaneously, welding all cross-bar intersections in one cycle. This parallel welding design dramatically increases production output compared to single-point welding methods. For a standard grating panel with 30+ cross bars, the multi-head configuration reduces welding time by over 70%, enabling high-volume batch production for industrial grating orders.

2. Press-Type Welding with Stable Electrode Force
The press-type welding mechanism applies uniform downward pressure across all welding points, ensuring each bearing bar-to-cross-bar joint receives consistent electrode force. This is critical for steel grating where load-bearing strength depends on every weld point being solid. The automatic pneumatic pressure control eliminates human variability and reduces weld splash.

3. PLC Intelligent Control System
The touch-screen PLC controller manages welding sequence timing, electrode pressure parameters, and production cycle automation. Operators can store multiple grating specifications as preset programs, enabling quick changeover between different grating types (walkway, drainage, heavy-duty) without manual recalibration. The intuitive interface reduces operator training time to 1-2 days.

PLC touch-screen control system for automatic steel grating multi-head welding machine.

4. 40-200KVA Flexible Power Configuration
Available in multiple power ratings to match different grating specifications. The 200KVA configuration handles heavy-duty grating with thick bearing bars (up to 6mm) for mining and petrochemical applications, while lower power settings optimize energy efficiency for standard walkway and drainage grating production.

Technical Specifications

Steel Grating Applications

This multi-head welding machine is specifically designed for manufacturing the following steel grating products:

Industrial Walkway Grating
Produce grating panels for factory platforms, industrial stairs, maintenance walkways, mezzanine floors, and catwalks. Consistent weld strength ensures load-bearing safety and long service life in industrial environments.

Drainage Grating & Trench Covers
Manufacture trench covers, drain gratings, and channel covers for municipal infrastructure, wastewater treatment plants, and commercial facilities. The press-welded joints provide reliable structural integrity for vehicular and pedestrian traffic loads.

Heavy-Duty Industrial Grating
Produce high-load grating for mining operations, petrochemical plants, offshore platforms, and power generation facilities. The 200KVA configuration handles thick bearing bars required for extreme-duty applications with high safety factors.

Why Choose Xinwei Welding

Factory & Quality Control

• 100% welding current calibration on all welding heads
• Pneumatic electrode pressure verification and uniformity testing
• PLC control system functional testing with production simulation
• Full production trial run producing actual grating panels
• Weld strength testing on sample grating joints
• Pre-shipment inspection with detailed documentation

After-Sales Service & Support

Frequently Asked Questions

Q: What types of steel grating can this machine produce?
A: This multi-head welding machine produces industrial walkway grating, drainage grating and trench covers, heavy-duty platform grating for mining and petrochemical applications, stair treads, and custom grating panels. It handles bearing bar and cross-bar combinations with consistent weld quality across all joint intersections.

Q: How does multi-head welding improve production efficiency?
A: Instead of welding each cross-bar intersection one at a time, multiple welding heads fire simultaneously — welding all cross-bar joints on a bearing bar in one cycle. For a standard 1m x 6m grating panel with 30 cross bars, multi-head welding reduces total welding time by over 70% compared to sequential welding, dramatically increasing daily output.

Q: Can the machine switch between different grating specifications quickly?
A: Yes. The PLC system stores multiple preset programs for different grating specifications (bearing bar spacing, cross-bar pitch, bar thickness). Operators can switch between programs via the touch screen without manual recalibration. Typical changeover time between different grating types is under 30 minutes.

Q: What is the delivery and installation timeline?
A: Standard delivery is 25-45 working days. On-site installation and commissioning takes 5-7 working days including grating specification programming, production trial runs, and operator training. Remote pre-commissioning support is available to accelerate the on-site process.

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