Product Parameters
Items Model | Unit | HFDB-200 |
| Rated capacity | KVA | 240 |
| Power supply | V/Ø/Hz | 380V±10% / 3 phases / 50Hz |
| Rated duty cycle | % | 20% |
| Primary current Max. | A | 150 |
| Primary cable | mm2 | 3*50+2*16 |
| Short-circuit current Max. | KA | 58 |
| Secondary voltage | V | 9.6 |
| Air pressure cylinder | Ø*L | Ø160*120/Ø200*120 |
| Working pressure Max. (0.5/10.5MPa) | KN | 10/15 |
| Cooling water demand | / | 0.2～0.3MPa,40 micron filtration, Resistivity of 5 kΩ. cm |
| Cooling water consumption | L/Min | 35 |
| Throat depth | mm | 425 |
| Distance between copper plates | mm | 248 |
| Working environment | | Temperature: 1～45℃ humidity: 35～90％ |
Product Introduction
The HFDB-200 MFDC spot welder is a medium-frequency inverter
resistance welding machine designed for metal sheets, automotive
components, hardware parts, electrical connectors, and non-ferrous
metal parts. With medium-frequency DC output, the machine provides
more stable welding current and faster current response than
conventional AC spot welding equipment, making it suitable for
applications that require consistent weld strength and stable batch
production.
The machine can be used for spot welding, projection welding, nut
and bolt projection welding, and multi-point projection welding. It
is suitable for common steel, iron, stainless steel, copper,
silver, nickel, and selected alloy materials. In automotive
manufacturing, it can be applied to high-strength steel, hot-formed
steel, galvanized sheets, and fastener projection welding.
Haifei can provide machine selection, fixture design, electrode
matching, sample welding, and automation integration based on the
customer’s workpiece drawing, material thickness, weld point
position, strength requirement, and production target.
Key Selling Points Of MFDC Spot Welder
Stable MFDC Output
The HFDB-200 uses medium-frequency DC welding output to reduce
current fluctuation often found in traditional AC welding. Stable
current output helps improve weld consistency, especially for
high-strength steel, hot-formed steel, galvanized sheets, and
projection welded parts that require controlled heat input.
Suitable for Both Spot Welding and Projection Welding
The machine can be used not only for standard sheet metal spot
welding, but also for nut projection welding, bolt projection
welding, multi-point projection welding, and selected non-ferrous
metal welding applications. For welding tasks that require
localized heat concentration, MFDC resistance welding helps control
heat distribution and reduce weak welds, spatter, and uneven weld
points.
Suitable for High-Strength Steel, Hot-Formed Steel, and Galvanized
Sheets
High-strength steel, hot-formed steel, and galvanized sheets are
commonly used in automotive manufacturing and require better
current response, pressure control, and electrode matching. The
HFDB-200 can be used for spot welding and projection welding of
these materials, helping customers achieve more stable weld
quality.
Custom Fixture and Electrode Design
Different workpieces have different weld point positions, product
shapes, loading methods, and positioning requirements. Standard
fixtures are not always suitable for every application. Haifei can
design dedicated positioning fixtures, electrode structures,
clamping methods, and error-proofing mechanisms based on customer
drawings.
Automation Integration Available
The HFDB-200 can be used as a stand-alone machine or integrated
into semi-automatic and fully automatic welding systems according
to production requirements. It can work with automatic feeding
systems, nut feeders, workpiece positioning systems, robotic
loading and unloading, inspection units, and production line
control systems.
Product Applications
Automotive Component Manufacturing
The HFDB-200 is suitable for high-strength steel, hot-formed steel,
galvanized sheets, brackets, stamped parts, reinforcement plates,
and nut or bolt projection welding in automotive component
production. Automotive parts usually require stable weld strength,
accurate weld position, and consistent batch quality, so the
equipment must provide stable current output and repeatable welding
control.
Nut and Bolt Projection Welding
The machine can be used for projection welding of nuts, bolts,
pins, and fasteners onto sheet metal parts. Projection welding
quality is affected by projection height, nut position, fixture
accuracy, electrode pressure, and welding current. With dedicated
fixtures and electrode structures, the HFDB-200 helps improve
consistency and reduce problems such as weak welds, misalignment,
and incomplete fusion.
Galvanized Sheet and Stainless Steel Welding
The HFDB-200 can be used for spot welding or projection welding of
galvanized sheets, stainless steel sheets, and low-carbon steel
sheets. For galvanized sheets, attention should be paid to the
effect of zinc coating on electrode wear and welding spatter. For
stainless steel, heat input should be controlled to reduce
overheating, deformation, and unstable weld appearance.
Electrical Connectors and Non-Ferrous Metal Parts
The machine can also be used for welding copper, silver, nickel,
and selected alloy materials, including electrical connectors,
terminals, conductive plates, and contact parts. Because copper and
silver have high electrical and thermal conductivity, sample
welding is recommended to confirm welding current, pressure,
electrode material, and joint strength.
Hardware Stamped Parts and Industrial Metal Components
The HFDB-200 is suitable for spot welding and projection welding of
hardware stamped parts, metal brackets, mounting plates, connecting
pieces, reinforcement parts, and other industrial metal components.
For multiple models, multiple weld points, or irregular workpieces,
custom fixtures can improve positioning accuracy and production
efficiency.
Why Choose HAIFEI Machine ?
Experience in MFDC Spot and Projection Welding Equipment
Haifei has long-term experience in MFDC spot welding machines and
customized automation solutions. Its product range includes MFDC
spot welding machines, polymer diffusion welding machines,
ultrasonic metal welding machines, capacitor discharge spot and
projection welders, MFDC seam welding machines, industry-specific
automated welding machines, and related welding equipment.
Process Evaluation Based on Real Workpieces
Haifei does not only provide standard machines. The team can
evaluate the welding process based on customer drawings, samples,
materials, thickness, weld point quantity, strength requirements,
and production targets. This helps reduce the risk of incorrect
machine selection, unsuitable fixtures, and long commissioning
time.
Sample Welding Support
For high-strength steel, hot-formed steel, galvanized sheets,
non-ferrous metals, nut projection welding, and multi-point
projection welding projects, sample welding is recommended before
finalizing the machine solution. Through sample welding, Haifei can
check weld appearance, weld strength, electrode matching, pressure
settings, and process stability.
Custom Fixtures, Electrodes, and Automation
Different workpieces require different weld point positions and
clamping methods. This is especially true for automotive parts and
irregular stamped components, where positioning accuracy and
error-proofing are important. Haifei can provide custom fixtures,
electrode structures, welding programs, feeding mechanisms, loading
and unloading systems, and automation integration.
From Stand-Alone Machines to Automated Production Lines
The HFDB-200 can be used as an independent MFDC spot welding
machine or integrated into an automated welding cell. For
high-volume production projects, it can be combined with robots,
automatic feeding systems, nut feeders, inspection devices, and
data recording functions to form a complete automated welding
solution.
Installation, Commissioning, and After-Sales Support
Haifei can provide installation guidance, commissioning support,
operator training, welding parameter optimization, electrode
maintenance advice, and long-term technical support. For production
issues such as weak welds, spatter, unstable weld points, or nut
detachment, Haifei can help analyze the problem based on the actual
workpiece and welding process.
FAQ
Q1:What products is the HFDB-200 mainly used for?
A:The HFDB-200 is suitable for automotive components, hardware
stamped parts, galvanized sheets, stainless steel sheets,
high-strength steel, hot-formed steel, nut and bolt projection
welding, electrical connectors, and selected non-ferrous metal
parts.
Q2. Can the HFDB-200 be used for nut projection welding?
A:Yes. The HFDB-200 can be used for projection welding of nuts,
bolts, pins, and other fasteners. The final welding result depends
on nut size, projection height, sheet thickness, fixture
positioning, electrode pressure, and welding current.
Q3. What are the advantages of an MFDC spot welding machine
compared with an AC spot welder?
A:An MFDC spot welding machine provides more stable current output,
faster response, and better heat input control. It is more suitable
for high-strength steel, galvanized sheets, projection welding
parts, and batch production that requires consistent weld quality.
Q4. Can the HFDB-200 weld copper, silver, and nickel materials?
A:It can be used for selected copper, silver, nickel, and alloy
welding applications. Because these materials have high electrical
and thermal conductivity, sample welding is recommended to confirm
welding current, pressure, electrode material, and joint strength.
Q6. Can the HFDB-200 be integrated into an automatic production
line?
A:Yes. The machine can be combined with automatic feeding systems,
nut feeders, robotic loading and unloading, positioning fixtures,
inspection units, and production line control systems to form a
semi-automatic or fully automatic welding solution.
