Capacitor Discharge Welders: Model Comparison and Selection
HAIFEI capacitor discharge welders are press-type resistance welding machines used mainly for projection welding nuts, bolts, fasteners and formed metal components. The HFTR series covers different capacitance, current and electrode-force ranges, allowing each project to be configured around the workpiece rather than selected from one power rating alone.
The table below provides an initial comparison of the available models. Final selection should also consider the material, coating, projection geometry, number of simultaneous welds, required joint strength and production cycle. Haifei can review drawings and test customer samples before confirming the machine, electrodes and fixture.
These machines are press-type capacitor discharge resistance welders. They are different from portable CD stud welding systems that use a handheld welding gun.
Compare HAIFEI Capacitor Discharge Welder Models
The HFTR series includes six standard power ranges. Capacitance, maximum short-circuit current and available electrode force increase across the series, but the largest machine is not automatically the correct choice.
|
|
Items \ Model |
unit |
HFTR-5000 |
HFTR-10000 |
HFTR-15000 |
HFTR-20000 |
HFTR-30000 |
HFTR-45000 |
|
1 |
Capacitor volume |
uf |
10000 |
20000 |
30000 |
40000 |
60000 |
90000 |
|
2 |
Power supply |
KVA/V/Hz |
10/380/50 |
15/380/50 |
25/380/50 |
30/380/50 |
45/380/50 |
100/380/50 |
|
3 |
Rated duty cycle |
% |
50% |
50% |
50% |
50% |
50% |
50% |
|
4 |
Primary current Max. |
A |
30 |
60 |
60 |
80 |
100 |
120 |
|
5 |
Primary cable |
mm2 |
3*10+2*6 |
3*10+2*6 |
3*16+2*6 |
3*16+2*6 |
3*25+2*6 |
3*35+2*10 |
|
6 |
Short-circuit current Max. |
KA |
18 |
38 |
58 |
76 |
100 |
120 |
|
7 |
Secondary voltage |
V |
10-12 |
12-14 |
12-14 |
17-19 |
17-19 |
22-25 |
|
8 |
Air pressure cylinder |
Ø*L |
Ø160*110 |
Ø160*110 |
Ø200*110 |
Ø320*150 |
Ø320*150 |
Ø320*150 |
|
9 |
Working pressure Max. (0.5/10.5MPa) |
KN |
10 |
10 |
15.7 |
40 |
40 |
40 |
|
10 |
Working environment |
|
temperature: 1～45℃ humidity: 35～90％ |
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Specifications are based on the current standard configuration. Electrical supply, machine dimensions, throat depth, electrode stroke, cooling and control functions should be confirmed in the technical proposal.
Ask HAIFEI to Compare the Models
Key Technology Advantages
Fast Energy Release with Low Heat Input
Capacitor discharge welding releases stored energy in a very short time. This helps reduce heat spread around the weld area and is useful for thin sheets, plated parts, small metal components, and parts that are sensitive to thermal deformation.
01
Stable Welding for Projection and Stud Applications
The machine can concentrate welding energy at projection points, studs, or small contact areas. This makes it suitable for nut welding, stud welding, hardware parts, and electrical components that need strong localized joints.
02
Adjustable Energy for Different Materials
Welding energy can be adjusted according to material type, thickness, projection size, electrode shape, and required joint strength. Proper energy matching helps reduce weak welds, excessive indentation, and surface burn marks.
03
Lower Workpiece
Deformation
Because the welding time is short, heat input is more concentrated. This helps reduce distortion on thin metal sheets or small assembled parts compared with slower heating processes.
04
Suitable for Batch Production with Custom Fixtures
For repeated production, Haifei can design fixtures, electrodes, and control programs according to part drawings, weld point position, and loading method.
05
Typical Applications of Capacitor Discharge Welder
Nut and Stud Projection Welding
Used for welding nuts, studs, pins, and fasteners to sheet metal parts. The process provides concentrated heat at the projection point and helps reduce heat spread on the base material.
01
Battery Tab and Electrical Component Welding
Suitable for selected battery tabs, connector terminals, copper-nickel parts, and electrical components where fast energy release and controlled heat input are required.
02
Thin Sheet Metal Welding
Used for thin carbon steel, stainless steel, galvanized sheet, and selected plated metal parts that are sensitive to deformation or surface marks.
03
Hardware and Small Metal Parts
Suitable for brackets, small plates, clips, contacts, pins, and assembled metal parts requiring fast spot welding or projection welding.
04
Automotive and Appliance Components
Can be used for selected small automotive parts, appliance brackets, terminal parts, and sheet metal assemblies where repeatable weld strength and low deformation are required.
05
Energy Storage Welding Sample
Why Choose HAIFEI Capacitor Discharge Welder?
HAIFEI Capacitor Discharge Welders are designed for nuts, studs, fasteners, thin sheet metal parts, electrical components, and hardware assemblies. The machine releases stored energy in a short welding cycle, helping concentrate heat at the projection point and reduce thermal impact on the surrounding area.
HAIFEI can provide model selection, sample welding, fixture design, electrode matching, and automation integration according to customer drawings and production requirements. For projects involving nut projection welding, stud welding, battery tabs, terminals, or custom metal parts, Haifei helps verify the welding process before final machine delivery.
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FAQ About Capacitor Discharge Welders
Q: Is a capacitor discharge projection welding machine suitable for nut and stud welding?
A: Yes. It is suitable for nut welding, stud welding, pin welding, and fastener welding on sheet metal parts. The final welding result depends on the projection size, sheet thickness, welding pressure, electrode design, and required pull-out strength.
Q: How do I know which capacitor discharge welder model to choose?
A: The model should be selected according to the material, thickness, projection size, weld point quantity, required joint strength, and production cycle. For larger projections or higher strength requirements, a higher energy model may be needed.
Q: Can capacitor discharge welding reduce deformation on thin metal parts?
A: Yes. Because the welding time is very short and heat is concentrated at the weld point, capacitor discharge welding can help reduce heat spread and deformation on thin sheets. Sample testing is still recommended before mass production.
Q: What causes weak welds in capacitor discharge projection welding?
A: Weak welds may be caused by insufficient welding energy, unstable electrode pressure, poor projection shape, dirty workpiece surface, incorrect fixture positioning, or unsuitable electrode contact. These factors should be checked during sample welding.
Q: Can the machine be used for automated production?
A: Yes. The machine can be integrated with automatic feeding, nut or stud feeding, custom fixtures, robotic loading, inspection units, and production line systems. The automation layout should be designed according to the workpiece and output target.
Wuxi Haifei Intelligent Equipment Co., Limited is one of the leading manufacturers and suppliers of Capacitor Discharge Welders in China. With abundant experience, we warmly welcome you to buy advanced Capacitor Discharge Welders for sale here from our factory. Quality products and reasonable price are available.
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