MFDC Spot Welding Machine

Product Specification

Technical Parameters

Product Overview

HFDB-100 is a medium-frequency DC resistance welding machine for industrial spot welding and projection welding. It is mainly used when the workpiece requires concentrated heat input, stable current, short welding time, and consistent weld quality.

The machine is suitable for both standard metal sheet welding and more demanding production cases, such as high-strength steel, hot-formed steel, galvanized sheet welding, nut projection welding, and electrical contact welding.

Compared with traditional power-frequency welding machines, MFDC welding equipment can offer better current control, faster response, and more stable welding performance. This helps improve weld consistency, reduce current fluctuation, and support batch production with stricter quality requirements.

Key Selling Points

1.Stable MFDC Welding Current

The HFDB-100 uses medium-frequency inverter DC output to help reduce current fluctuation during welding. Stable current is important for high-strength steel, galvanized sheets, and projection welding applications where weld strength and repeatability are required.

2.Suitable for Spot Welding and Projection Welding

This machine can be used for regular spot welding as well as projection welding. It is suitable for metal sheets, wires, nuts, bolts, copper components, silver contacts, and other parts that require localized resistance welding.

3.Strong Welding Capability for Industrial Parts

With a maximum short-circuit current of 38KA and rated capacity of 2×80KVA, the HFDB-100 can support demanding resistance welding applications. It can be used in automotive manufacturing, electrical component production, and metal parts assembly.

4.Better Control for High-Strength and Coated Materials

High-strength steel, hot-formed steel, and galvanized sheets often require accurate current and pressure control. The MFDC system helps control heat input more steadily, reducing the risk of unstable welding, excessive spatter, and weak joints.

5.Support for Custom Fixtures and Electrodes

Different workpieces require different electrode shapes, positioning fixtures, and welding sequences. Haifei can design fixtures and electrode structures according to part drawings, weld point positions, material thickness, and production requirements.

6.Suitable for Automation Integration

The machine can be used as a stand-alone welding unit or integrated into semi-automatic and fully automatic welding systems. For batch production, it can be connected with feeding systems, positioning fixtures, robots, inspection units, and production line equipment.

Product Applications

1.Automotive Parts Manufacturing

HFDB-100 can be used for spot welding and projection welding of automotive metal parts, including high-strength steel components, hot-formed steel parts, brackets, stamped parts, and nut projection welding applications.

2.Galvanized Sheet and Stainless Steel Welding

The machine can be applied to galvanized sheets, stainless steel sheets, and low-carbon steel plates. Welding parameters should be adjusted according to material thickness, surface coating, electrode condition, and required weld strength.

3.Nut and Multi-Point Projection Welding

For parts that require nut welding or multi-point projection welding, the machine can concentrate heat at the projection points and complete the welding process with stable pressure and current.

4.lectrical and Low-Voltage Component Welding

HFDB-100 can be used for resistance brazing and spot welding in electrical component production, including copper wire, copper plate, silver contact, and composite silver contact welding applications.

5.Wire and Metal Parts Welding

The machine can also be used for wire welding and selected metal parts assembly. The final solution should be confirmed according to wire diameter, material type, contact area, and required pulling strength.

Product Advantages

1.More Stable Welding Output

MFDC welding output helps improve current stability during the welding cycle. This is helpful for parts that are sensitive to current fluctuation, such as coated sheets, high-strength materials, and projection welding parts.

2.Shorter Welding Response Time

Medium-frequency inverter technology allows the welding current to respond more quickly during the welding process. This helps improve heat control and makes the process more suitable for repeatable batch production.

3.Reduced Welding Spatter

When current, pressure, and welding time are matched properly, MFDC welding can help reduce spatter and improve weld appearance. This is especially useful for galvanized sheets, thin plates, and visible metal parts.

4.Lower Transformer Size and Better Energy Use

Compared with traditional AC welding systems, MFDC equipment usually has a more compact transformer structure and better power control. This helps improve equipment layout flexibility and production energy management.

5.Better Fit for Customized Production

Haifei can adjust the equipment configuration according to customer drawings and production conditions. Fixture design, electrode structure, welding pressure, control logic, and automation connection can be planned based on the actual workpiece.

Why Choose Haifei Equipment?

1.Focus on Resistance Welding Equipment

Haifei has long-term experience in resistance welding equipment, including medium-frequency spot welding machines, projection welding machines, seam welding machines, capacitor discharge welding machines, diffusion welding machines, and customized welding automation systems.

2.Process Evaluation Before Machine Design

Before recommending the machine configuration, Haifei can review the customer’s part drawing, material, thickness, weld point layout, production capacity, and quality requirements. This helps make the equipment closer to the actual production process instead of using a general machine layout.

3.Sample Welding Support

For new parts, special materials, or strict quality requirements, sample welding can be arranged before final machine confirmation. The test can help verify weld appearance, joint strength, electrode selection, welding parameters, and fixture suitability.

4.Custom Fixture and Automation Design

Haifei can provide customized fixtures, electrode structures, feeding systems, control programs, and automation integration according to the customer’s production needs. This is useful for nut projection welding, multi-point welding, copper part welding, and automotive part production.

5.Technical Support After Delivery

Haifei can provide installation guidance, machine commissioning support, operator training, welding parameter adjustment, spare parts suggestions, and long-term technical support for production use.

FAQ

Q1:What is the main use of HFDB-100?

A:HFDB-100 is mainly used for resistance spot welding and projection welding of metal sheets, automotive parts, electrical components, nuts, wires, copper parts, and silver contacts.

Q2:Can it weld high-strength steel?

A:Yes. It can be used for high-strength steel and hot-formed steel welding. The final welding parameters should be confirmed according to material grade, thickness, and required weld strength.

Q3:Is it suitable for nut projection welding?

A:Yes. The machine can be used for nut projection welding. For stable results, the fixture, nut position, projection height, welding current, and electrode pressure need to be matched properly.

Q4:Can this machine weld galvanized sheets?

A:Yes. It can weld galvanized sheets, but the zinc coating will affect heat generation and electrode wear. Proper parameter setup and electrode maintenance are important.

Q5:Does the machine need cooling water?

A:Yes. The HFDB-100 requires cooling water, and the listed cooling water consumption is 25L/min. Proper cooling helps protect the transformer, electrodes, and welding circuit during operation.