Technical Specifications
|
Parameter
|
Specification
|
|
Equipment Name
|
Spot Welding Machine
|
|
Model
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DB200H
|
|
Rated Duty Cycle
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20%
|
|
Transformer Capacity
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240 KVA
|
|
Cylinder Bore / Stroke
|
200 mm / 110 mm
|
|
Max. Working Pressure
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15,000 N
|
|
Max. Primary Current
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250 A
|
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Current Adjustment Range
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0% ~ 99%
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|
Transformer Insulation Class
|
Class F
|
|
Max. Secondary Short-Circuit Current
|
58 KA
|
|
Lower Electrode Arm Deflection
|
< 0.1 mm (at max. cylinder pressure)
|
What Does the DB200H Weld?
The DB200H is intended for resistance welding silver or copper contacts to formed copper parts. Typical workpieces include copper contact arms, conductive plates and similar electrical contact components.
During welding, the contact and copper carrier are held between the electrodes. Current passes through the joint under controlled force, generating heat at the contact interface.
The final process depends on:
- Contact material and dimensions
- Copper carrier material and thickness
- Joint shape and projection structure
- Required contact position
- Electrode shape
- Welding force
- Current and welding time
- Required joint strength
The machine should be confirmed using the customer's actual drawings and materials. Similar-looking contact parts may require different electrodes, fixtures and welding programs.
MFDC Welding Process for Silver Contacts
The machine converts three-phase AC input into 1000 Hz medium-frequency inverter DC output. Welding current, electrode force and welding time are set according to the contact and copper carrier.A typical welding sequence includes four stages.
Part Positioning
The copper part is placed in the locating fixture. The silver or copper contact must sit correctly over the required welding position before the electrodes close.
Electrode Pressurization
The upper and lower electrodes clamp the workpiece. Stable alignment is important because contact components are normally small and positional movement can affect the finished assembly.
Programmed Heating
The controller applies the selected preheat, weld and temper sequence. Current rise and fall can be adjusted within the welding program when required by the workpiece.
Hold and Release
Electrode force is maintained for the programmed hold time before the finished part is released. The workpiece is then checked according to the agreed inspection method.
Suitable Applications
Copper Contact Arms
The machine can weld silver or copper contacts onto formed copper contact arms. The fixture is designed around the part profile, mounting holes and required contact position.
Household Electrical Components
The DB200H is intended for contact assemblies used in household and civilian electrical products. The actual application must be verified from the contact material, copper-part thickness and joint-strength requirement.
Low-Voltage Electrical Contacts
Silver contact components for switches, relays, contactors or circuit breakers may be evaluated when their dimensions and production method match the machine's working range.
Problems Checked During Process Development
Contact Position Deviation
A locating fixture is used to control the copper part and contact position. The tolerance must be agreed from the product drawing before fixture design.
Contact Movement During Pressurization
The electrode approach, fixture support and initial force setting should be checked to prevent the contact from moving before welding current is applied.
Surface Indentation
Electrode shape, welding force and heat input affect the surface of the finished component. Appearance requirements should be provided before sample testing.
Insufficient Joint Strength
Low current, unsuitable force, contamination or poor joint contact may produce insufficient strength. The welding program must be developed with representative production materials.
Excessive Heating
Excessive current or welding time can mark or deform the copper carrier. A multi-stage current program can be tested when the workpiece requires a more controlled heating sequence.
Electrode Wear
Electrode wear can change contact pressure and current concentration. Inspection and dressing intervals should be established during continuous production testing.
DB200H or an Automatic Silver Contact Welding Machine?
The DB200H is a dedicated MFDC welding machine. It focuses on welding-current control, electrode force, fixture positioning and flexible program management.
An automatic silver contact welding system can additionally include contact feeding, workpiece feeding, vision inspection, automatic unloading and production-line integration.
| DB200H Silver Contact Spot Welder | Automatic Silver Contact Welding System |
| Operator or fixture-assisted loading | Automatic component feeding |
| Suitable for flexible production and product changeover | Suitable for stable high-volume production |
| Dedicated fixture and electrode | Feeding, positioning and inspection stations |
| Up to 64 welding programs | Automatic recipe and model management |
| Lower system complexity | Higher automation level |
| Automation connection available through I/O | Complete automated production sequence |
For projects requiring automatic feeding and inspection, view the Automatic Silver Contact Welding Machine.
Why Choose Haifei for Contact Welding Projects?
Workpiece Review Before Machine Selection
Haifei reviews the contact material, copper carrier, welding position, required strength and target output before recommending the machine configuration.
01
Welding Trials with Customer Samples
Representative samples can be tested to check the process, fixture structure, electrode design and initial welding-parameter range.
02
Fixture and Electrode Development
The fixture and electrodes are designed around the approved workpiece rather than selected only by contact diameter.
03
Machine Assembly and Commissioning
The machine is assembled and tested at the Haifei factory. Where customer samples are available, trial welding can be included in the commissioning process.
04
Technical Support
Operating guidance, machine documents and remote technical support are available. On-site training can be arranged according to the project and service agreement.
05
FAQ
Q: What does the DB200H silver contact spot welding machine weld?
A: It is designed to weld silver or copper contacts onto copper electrical parts. The material, part thickness and joint structure must be checked before the process is confirmed.
Q: Is the DB200H an automatic silver contact welding machine?
A: The standard DB200H is a dedicated MFDC welding machine. Automatic feeding, vision inspection and unloading are separate automation configurations unless they are included in the technical proposal.
Q: Why does the machine use 1000 Hz MFDC output?
A: The inverter controller allows the welding current and time to be programmed for electrical contact assemblies. The final result also depends on electrode force, joint contact and workpiece material.
Q: Can the DB200H store different welding programs?
A: Yes. It can store up to 64 welding specifications. A different product may also require corresponding fixtures and electrodes.
Q: Can the machine weld contacts for circuit breakers and relays?
A: These parts can be evaluated, but suitability depends on the contact material, copper carrier, joint design, electrode access and required output. Sample testing is recommended.
Q: How should a welded silver contact be inspected?
A: Inspection may include contact position, surface condition, mechanical strength and electrical performance. The test method and acceptance values should be defined before production.
Wuxi Haifei Intelligent Equipment Co., Limited is one of the leading manufacturers and suppliers of silver contact spot welding machine in China. With abundant experience, we warmly welcome you to buy advanced silver contact spot welding machine for sale here from our factory. Quality products and reasonable price are available.
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