semi_auto_welding_presentation

1.

Technological Process of SemiAutomatic Welding
Presentation in English

2.

Definition of Semi-Automatic
Welding
• Semi-automatic welding: a welding process
where the wire is fed automatically, but the
movement of the welding torch is controlled
manually.
• Mainly used in MIG/MAG welding.

3.

Equipment Used
• Welding power source
• Wire feeder
• Welding torch
• Shielding gas cylinder
• Ground clamp

4.

Welding Materials
• Carbon steels
• Stainless steels
• Aluminum alloys
• Other non-ferrous metals

5.

Shielding Gases
• Carbon dioxide (CO₂)
• Argon (Ar)
• Mixtures of Ar + CO₂
• Argon + Oxygen (Ar + O₂) mixtures

6.

Welding Process Stages
• Preparation of materials (cleaning, edge
preparation)
• Setting welding parameters (current, voltage,
gas flow)
• Wire feeding and arc ignition
• Welding process with torch movement
• Cooling and inspection of the joint

7.

Advantages
• High welding speed
• Good quality of welded joints
• Possibility of automation and robotization
• Suitable for thin and thick materials

8.

Disadvantages
• Sensitive to wind and drafts (gas protection)
• Higher cost of equipment compared to
manual welding
• Requires skilled operators

9.

Applications
• Automotive industry
• Shipbuilding
• Construction of steel structures
• Pipeline construction
• Repair works

10.

Comparison with Manual Welding
• Higher productivity
• Better quality and fewer defects
• Less manual labor
• More complex equipment

11.

Weld Defects and Prevention
• Porosity – use correct shielding gas
• Lack of fusion – correct torch angle and
parameters
• Burn-through – reduce current or travel speed
• Spatter – optimize voltage and gas flow

12.

Safety Precautions
• Use of personal protective equipment (PPE)
• Ventilation for fumes
• Proper grounding
• Fire safety measures

13.

Recent Developments
• Introduction of pulsed MIG/MAG welding
• Use of advanced shielding gas mixtures
• Integration with robotic systems
• AI-supported quality monitoring

14.

Conclusion
• Semi-automatic welding is a versatile and
widely used process.
• It combines high efficiency with good quality
of welds.
• Future lies in automation, robotics, and AI
monitoring.