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Ultra-thin board CP cold welding technology
**Summary:**
The Variable Polarity MIG/MAG welding process, also known as the CP (Cold Pulse) welding technique, is specifically designed for welding thin sheets ranging from 0.2mm to 2mm. It can be used on various materials such as steel, stainless steel, aluminum, coated metals, and dissimilar metals, supporting both manual and automated welding. This advanced method significantly increases welding speed while minimizing thermal impact on the base metal, resulting in high-quality welds with less distortion.
**Keywords:** variable polarity MIG/MAG, waveform control, sheet welding
**Foreword:**
With the rapid development of modern industry, the use of thin plates has become widespread across many sectors. Manufacturers are increasingly looking for reliable welding power sources that can efficiently handle thin plate welding, improve productivity, and ensure consistent quality. Thin plate welding requires strict control over heat input, which places high demands on the welding equipment. The welding process must remain stable, producing clean and aesthetically pleasing welds, while reducing the thermal deformation of the base material. In 2002, CLOOS Germany introduced the world's first polarized MIG/MAG welder, the GLC353QUINTO CP, which effectively solved the challenges of thin plate welding.
**1. Variable Polarity MIG/MAG Welding Technology**
In traditional DC MIG/MAG welding, the arc stability and penetration are good, but when welding thin plates, there is a risk of burn-through or undercut. In DC negative polarity, the arc tends to climb along the wire, leading to unstable droplet transfer and shallow penetration, often resulting in poor fusion or uneven bead formation.
Variable polarity pulsed MIG/MAG welding alternates between positive and negative polarity, allowing better control over the welding process. When the wire is in positive polarity, it helps melt the wire and control droplet transfer. When in negative polarity, the arc creeps along the wire, reducing the heat input into the molten pool and decreasing penetration depth. This makes it ideal for thin plate welding.
The GLC353QUINTO CP uses a unique current waveform to precisely control heat input by adjusting the negative base parameters, ensuring optimal welding results. Increasing the negative base time improves deposition rate, speeds up the welding process, and reduces heat input. The special waveform ensures good gap filling and excellent weld appearance, making it suitable for a wide range of materials.
**Advantages of CP Cold Welding Process:**
1. High welding speed – boosts production efficiency
2. Strong gap-filling capability – ensures quality even with large tolerances
3. Low heat input – ideal for heat-sensitive materials and reduces distortion
4. Minimal spatter – no need for re-cleaning
5. Larger diameter wires – improves feeding stability and lowers costs
**2. CP Welding Machine**
The GLC353QUINTO CP is a versatile digital inverter welding machine with advanced control technology. It supports multiple processes including MIG/MAG, pulsed MIG/MAG, MIG brazing, TANDEM double wire welding, manual arc welding, and CP cold welding. Key features include:
- Large high-definition LCD display
- Storage for 20,000 welding parameters
- Online and offline parameter editing
- Integrated expert system for unified control
- Adjustable parameters for full user customization
- Unique U/I and I/I pulse control methods
- Wide wire diameter range (0.6–2.4 mm)
- Excellent performance with aluminum and coated plates
- Network connectivity and automation support
Standard configuration includes the GLC 353 QUINTO CP power supply, CK118 wire feeder, connection cables, water-cooled torch, and grounding cable.
**3. CP Cold Welding Process Application**
Since its introduction in 2002, the CP cold welding process has gained widespread recognition. It is now applied to almost all types of metal materials.
a) **Steel Plates**
High-strength steel plates are widely used in automotive and industrial applications. CP welding reduces heat input and droplet frequency, improving welding speed and quality.
b) **Stainless Steel**
CP welding minimizes thermal deformation and surface discoloration, making it ideal for industries like food machinery and shipbuilding.
c) **Plated Sheets**
CP welding preserves the protective coating during the process, preventing damage and ensuring long-term corrosion resistance.
d) **Aluminum Alloys**
CP welding offers precise heat control and effective oxide removal, making it ideal for aluminum applications.
In conclusion, the CP cold welding process is an advanced MIG/MAG technique that alternates the polarity of the welding wire, greatly reducing heat input and minimizing thermal deformation. It is particularly well-suited for thin plate welding, offering faster speeds, better quality, and reduced distortion.