TECNA WELDING MACHINE MOD. 4608N POWER 20 KVA S MAX 48 CONTROL CARD WEIGHT ADJUSTMENT 122 KG CE MACHINE 

The spot welder is a machine mainly used for assembling sheet metal through spot welding. The TECNA 4608N with a power of 20 kVA is designed for industrial applications requiring high precision and reliability. Below you will find a complete overview of how a spot welder works, its use, the different existing types, the workable materials, the alternatives available, the calculations to optimize its operation, and the reasons why it might be better to buy a used model.

How it works and how to use a spot welder

The spot welder uses the resistance welding process to join two or more overlapping sheets. The machine works by creating an electrical circuit through two electrodes, between which the sheet metal is positioned. A high intensity current pulse is passed through the sheets, generating heat due to electrical resistance, which melts the materials and joins them at a specific point.

Phases of use:

1. Preparation of the sheets: The sheets to be welded are overlapped and positioned between the electrodes of the spot welder.
2. Parameter adjustment: The current, welding time and electrode pressure are adjusted according to the thickness and type of material.
3. Spot welding: The electrodes are closed on the sheets and the current is passed through for a short time, creating a welding spot.
4. Removal of the workpiece: After welding, the electrodes are lifted and the workpiece is removed.

Types of Existing Spot Welders

There are different types of spot welding machines, each with specific characteristics to adapt to different applications:

1. Manual spot welders: Operated manually, they are ideal for precision work or small productions.
2. Pneumatic spot welders: Use compressed air to drive the electrodes, offering greater power and speed.
3. Hydraulic spot welders: Use a hydraulic system to apply high pressure on the electrodes, ideal for thick sheet metal and materials that are more difficult to weld.
4. Automatic spot welders: Fully automated, suitable for mass production, where precision and repeatability are essential.
5. Portable spot welders: Used for interventions on large structures or in difficult to access places, such as in body shops.

Workable Materials

The TECNA 4608N is suitable for welding various metallic materials, including:

• Mild steel
• Stainless steel
• Aluminum (with special techniques)
• Copper (in specific applications)
• Galvanized sheets

The choice of welding parameters is essential to obtain a strong and durable weld, especially when working with different materials.

Reciprocating Machinery

Although the spot welder is specific for spot welding, other welding and assembly technologies exist:

• Wire welder (MIG/MAG): Used for continuous or spot welding on large surfaces.
• TIG welder: Ideal for high precision welding and on thinner or more delicate materials.
• Electrode welder (MMA): Used for welding thick materials and in outdoor environments.
• Riveter: An alternative to welding for sheet metal assembly, especially when it is necessary to avoid heating the material.
• Structural Bonding: Uses special adhesives to join dissimilar materials, often in combination with welding for added strength.

Calculations to Optimize Operation

To obtain optimal welds with a spot welder like the TECNA 4608N , it is important to perform accurate calculations:

• Welding current: It must be high enough to generate the heat necessary for fusion, but not so high as to damage the materials or electrodes. The current is determined based on the thickness and type of material.
• Welding time: The time during which the current is applied is crucial to obtaining a solid weld. Too short a time can lead to a weak weld, while too long can cause excessive heating and warping.
• Electrode pressure: The force with which the electrodes press on the sheet metal affects the quality of the weld spot. It must be high enough to ensure good contact but not so high that it deforms the material.
• Electrode diameter: Affects the size of the welding spot. Smaller electrodes are used for more precise spots, while larger ones distribute the current over a larger area.

Why It Is Worth Buying a Used TECNA 4608N Spot Welding Machine

Purchasing a used spot welder, such as the TECNA 4608N , can offer several advantages:

1. Reduced cost: A used model costs significantly less than a new one, allowing you to save on initial costs.
2. Reliability and robustness: TECNA machines are known for their durability and build quality, so a used model can still offer excellent performance for many years.
3. Immediate availability: Used models are often readily available, eliminating the wait time for the production and delivery of a new machine.
4. Ease of maintenance: Being a well-established brand, spare parts and technical assistance for TECNA models are easily available.
5. Low depreciation: Used machine tools tend to maintain their value better over time than new ones, reducing the risk of loss of value in the event of future resale.

In conclusion, the TECNA 4608N represents a smart choice for those looking for a reliable, high-quality machine at a reduced price. Its ability to perform precise and long-lasting spot welding makes it ideal for industrial and artisanal applications, guaranteeing an excellent quality-price ratio.