Capacitor Discharge Welders

Heron CD projection welders

Main features
Designed for high-precision projection welding, Heron’s Capacitor Discharge (CD) Projection Welders provide reliable welding quality for dissimilar and hard-to-join metals. Heron’s CD Welders operate with small heat affected zone and minimal water cooling, providing significant environmental and cost advantages.
 
Heron’s CD projection welders double as high-performance stud welders and projection nut welder, leveraging precise energy control to handle threaded fastener applications with minimal heat impact. Compatible with advanced stud welding gun systems, our solutions deliver fast, accurate, and reliable fastening for demanding industrial applications. Built with durable stud welding equipment, these machines ensure consistent weld quality, high productivity, and minimal material distortion.
Advantages of the process
  • Low demand on power grid
  • Shortest welding time
  • High precision
  • No need for water cooling
  • High repeatability
projection welder

Machine types

CD Welding Machines from 3KJ to 150KJ
Heron’s standard selection of capacitor discharge resistance welding solutions ranges from 3KJ to 150KJ.
Join metals with Heron’s medium voltage capacitor discharge welding technology for efficient, safe and high-quality welding!
3/4.5/6KJ
L series
10/15/20KJ
25/30/35/40KJ
H series
80-150KJ
Custom
L Series Capacitor Discharge Welder-3KJ/4.5KJ/6KJ
Choose based on your industry application, from a range between 3KJ to 6KJ power supply.

L series

Features

Our L series capacitor discharge projection welder is primarily designed for small screw nut projection welding and can also serve as a high-precision projection nut welder for attaching threaded nuts to metal workpieces. It has unique advantages in hot-stamped steel and galvanized steel nut welding.

Benefits
With features like short welding time, small heat affected zone, lower energy consumption, slow electrode loss, you can save significant manufacturing costs.
Inquiry

Standard Configurations

Operation

Foot Pedal Start

Control

Heron HRC-211

Components

Heron Round Cylinder

Airtac Pneumatic Components

EACO capacitors

Add-Ons

▢ PLC and Touch Screen

▢ Quality Monitor

▢ Safety Fences

▢ Single or Double-handed Start

▢ Optional Configurations Available on Request

H Series Capacitor Discharge Welder-10KJ/15KJ/20KJ
Choose based on your industry application, from a range between 10KJ to 20KJ power supply.
 

H series

Features

Our H series capacitor discharge projection welder has a roller ram cylinder and sturdy frame for reliable projection welding. It also doubles as a capable nut welder for automotive manufacturing, where welded nuts are required for body parts to secure doors, hoods, and trunks later in assembly, making it ideal for critical body components such as door beams, bumpers, A- and B-pillars, and roof covers.

Benefits
This series of capacitor discharge welders can be coupled with a real-time quality control system, which supports the transmission of welding parameters to an external computer – making it a versatile and efficient solution for your welding needs.
Inquiry

Standard Configurations

Operation

Double-Handed Start

Control

Heron HRC-211

Components

Heron Roller Ram Cylinder

FESTO Pneumatic Components 

IFM Flow Switch

Mitsubishi PLC and 7-inch Kunlun Touchscreen

Add-Ons

▢ Siemens PLC & Touch Screen 

▢ Quality Monitor

▢ Safety Fences

▢ Light Curtain

▢ Other Configurations Available on Request

 

H Series Capacitor Discharge Welder-25KJ/30KJ/35KJ/40KJ
Choose based on your industry application, from a range between 25KJ to 40KJ power supply.

H series

Features

Our H series capacitor discharge projection welder offers a top-notch solution with excellent rigidity, compact design and minimal space occupation. This versatile machine is perfect for multi-point projection welding, ring projection welding, and compatible with large size parts. Whether it’s  car door frames, car seat slides, water heater inlet and outlet pipes, dishwasher liners and more, this welder suits a wide range of demanding applications.

Benefits
This series of capacitor discharge welders is designed to fully comply with European CE and North American CUL standards. Guaranteed clean, reliable welds, with a charging time of just one second.
Inquiry

Standard Configurations

Operation

Double-Handed Start

Control

Heron HRC-211

Components

Heron Roller Ram Cylinder

FESTO Pneumatic Components 

IFM Flow Switch

Mitsubishi PLC and 7-inch Kunlun Touchscreen

Add-Ons

▢ Siemens PLC & Touch Screen 

▢ Quality Monitor

▢ Safety Fences

▢ Light Curtain

▢ Other Configurations Available on Request

 

Current curve determines the welding quality

Capacitor discharge curve
  • Can satisfy the demand for continuous increase of welding current
  • Continuous increase of the molten pool after the projection melting due to the decrease of contact resistance
  • Overcoming the shortcomings of the traditional AC and MFDC constant current output curve
  • The medium-voltage capacitor discharge projection welding is the best projection welding process in the field of resistance welding
Medium-voltage capacitor discharge welding energy concentration, heat-affected zone is small
  • The thread will not be deformed due to the heat of the welding process
  • The output energy is stable and reliable
  • Energy savings and overall consumption reduction

Applications

Industry applications
  • Automotive and general industry
Application material
  • Hot-stamped high-boron steels
  • Press hardened steels
  • Coated components
  • Weld nuts, bolts, and studs with a stud welding gun and reliable stud welding equipment.
  • Advanced high strength steels (R 0.2 < 1,600 MPa)
  • Steel types with high carbon content (greater than 0.2 %)
  • Workpieces with a wide range of different cross-sections and surfaces

Welding result

  • The heat affected zone of the nut after welding is small, and the thread is not deformed.
  • The galvanized layer of the thread and plate can be completely left intact.
  • The galvanized layer is not destroyed and no filament is required.
  • The molten core has a penetration depth greater than 0.2MM.

Video

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