The HFTR-20000 is a capacitor discharge nut projection welding machine for joining weld nuts, weld bolts and ring projections to stamped sheet-metal parts. It is intended for high-strength, hot-formed and galvanized steel applications where nut position, thread condition and verified torque or push-out strength must remain controlled.
Send us your workpiece drawing, nut specification, sheet material and required joint-strength standard for an initial welding assessment.
Core Selling Points & Advantages
High Energy Efficiency
No water cooling required, saving over 50% energy compared to traditional welders.
Long-life Capacitor
Film capacitors offer 4-5 times the lifespan of standard ones, lasting up to 20 million cycles.
Precision Control
Microcomputer control keeps welding time between 0.3-2ms and discharge time under 20ms.
Superior Conductivity
Equipped with genuine 22mm thick copper straps to ensure stable high-current transmission.
Stable Welding
Excellent welding effect; no re-tapping required after nut projection welding, boosting yield rates.
Powerful Instantaneous Current
Max short-circuit current of 150KA easily handles complex metal joining.
HFTR-20000 Technical Specifications
| Parameter | HFTR-20000 |
| Machine type | Capacitor discharge nut projection welding machine |
| Capacitor capacity | 40,000 µF |
| Input capacity / power supply | 30 kVA / 380 V / 50 Hz |
| Rated duty cycle | 50% |
| Maximum primary current | 80 A |
| Recommended primary cable | 3 × 16 + 2 × 6 mm² |
| Maximum short-circuit current | 76 kA |
| Secondary voltage | 17–19 V |
| Pneumatic cylinder | Ø320 × 150 mm |
| Maximum working force | 40 kN |
| Operating temperature | 1–45°C |
| Operating relative humidity | 35–90% |
| Loading method | Manual or fixture-assisted |
| Electrode and fixture | Designed according to the workpiece |
Application Fields
Automotive Body Components
Nut projection welding for high-strength and hot-formed steel.
Sheet Metal Fabrication
High-efficiency spot welding for various industrial enclosures.
Kitchenware
Precision welding for high-end stainless steel utensils.
Home Appliances
Structural assembly for refrigerators, air conditioners, and more.
Electromechanical Motors
Welding for precision motor components and lead wires.
Hardware Products
Versatile joining for diverse metal tools and hardware.
Nut Projection Welding
Why Partner With Us & Company Profile
As a specialized Capacitor Welding Machine Manufacturer, we provide a full-cycle service: from Initial Consultation and Sample Testing to Custom Design, Inspection, Installation, and Lifecycle Maintenance.
Our commitment to quality is backed by international certifications and a track record of serving global industry leaders.
Certifications
Our Partners
FAQ
01.What is the HFTR-20000 mainly used for?
02.Can it weld M6, M8, M10 or M12 nuts?
03.Can the machine weld galvanized steel?
04.What is the difference between capacitor discharge and MFDC nut welding?
05.Can it weld several projections at the same time?
Wuxi Haifei Intelligent Equipment Co., Limited is one of the leading manufacturers and suppliers of nut projection welding machine in China. With abundant experience, we warmly welcome you to buy advanced nut projection welding machine for sale here from our factory. Quality products and reasonable price are available.
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