1. Introduction
The HK-7WF Full Position Oscillating Automatic Welding Carriage is an advanced welding machine designed to enhance efficiency and weld quality across various applications. This manual provides essential information for the safe and effective operation, setup, and maintenance of your HK-7WF welding machine.
2. Key Features and Benefits
- Reduces labor intensity and improves the working environment.
- Increases work efficiency by 1.5 times compared to manual welding.
- Minimizes poor quality welds caused by human factors, significantly reducing the manual defect rate (typically around 20%).
- Achieves an overall efficiency increase of nearly 200% over manual welding.
- High degree of automation ensures stable welding quality.
- Easy to operate, allowing even unskilled workers to quickly master its use.
- Compact, lightweight design with durable cast aluminum housing.
- Convenient power options: 220V AC or mobile battery.
- Magnetic traction ensures close contact with the workpiece.
- Features a magnetic switch for easy workpiece setting and adjustment.
- Equipped with 4-wheel drive for smooth movement and is maintenance-free.
- Heat-resistant silicone wheel for durability.
- Automatic arc switch for simultaneous welding and travel.
- Spring-guided roller arm for precise weld tracking.
The HK-7W-F full position oscillating automatic welding carriage was developed on the basis of a standard fillet carriage to obtain a large weld joint and one-process welding. It combines the simplicity and lightness of the standard fillet carriage, and further improves the welding efficiency.
3. Part Names and Components
Familiarize yourself with the main parts of the HK-7WF welding carriage:

Figure 3.1: Labeled diagram of the HK-7WF welding machine components.
- Cable anchor
- Torch oscillator
- Torch holder
- Handle
- Control socket
- Guide bar
- Torch position adjuster
- Connector of torch holder
- Guide wheel
- Control box
- Clutch handle
4. Technical Specifications
The following table details the main technical parameters of the HK-7WF welding machine:
| Parameter | Value |
|---|---|
| Brand Name | XMSJ |
| Model | HK-7WF |
| Machine Type | Welding Robot / Welding Tractor |
| Origin | Mainland China (Zhejiang) |
| Condition | New |
| Dimensions (Machine) | 323mm x 258mm x 330mm |
| Machine Weight | 9.3kg (including the oscillator) |
| Package Dimensions | 600mm x 385mm x 420mm |
| Package Weight | 15.5kg |
| Input Voltage | 220V AC, 50/60Hz (also 110V/220V listed) |
| Oscillating Motor | DC24V / 4AH capacity lithium battery (optional) |
| Drive Mode | Four wheel drive |
| Welding Speed | 50-700mm/min (Horizontal), 50-600mm/min (Vertical) |
| Torch Adjustment Range (Up/Down) | 50mm |
| Torch Adjustment Range (Forward/Backward) | 50mm |
| Torch Holder Adjustable Angle | ±45° |
| Oscillating Angle | ±10° |
| Left and Right Stay Time | 0-2.5S |
| Offset Distance Setting | 0-±8° |
| Oscillating Speed | 0-99 |
| Oscillating Mode Selection | Various waveforms (e.g., straight, triangular, trapezoidal) |
| Usage | Welding plate |
| Welding Material | Stainless Steel, Carbon Steel, Metal |
| Level | Automatic Machine |
| Applicable Industries | Building Material Shops, Machinery Repair Shops, Manufacturing Plant |
| Video Outgoing-Inspection | Provided |
| Machinery Test Report | Provided |
| Core Components | Motor |
| Key Selling Points | Accurate temperature control |
5. Setup and Installation
Proper setup is crucial for optimal performance and safety. Follow these guidelines for connecting your welding carriage:
5.1 Welding Carriage Connections

Figure 5.1: Detailed wiring diagrams for power (220V AC and Lithium Battery) and gas connections. Note: Due to different welding machines, the plug should be required by the customer.
5.2 Standard and Optional Accessories
The HK-7WF comes with standard accessories and offers optional components for enhanced functionality:

Figure 5.2: Overview of standard and optional accessories, including various guide rail types and their installation.
5.3 Guide Rail Installation
The welding carriage utilizes guide rails for precise movement. Refer to Figure 5.2 for installation diagrams:
- Straight Guide Wheel Installation: For linear welding paths.
- 2D Guide Wheel Installation: For welding on two-dimensional curves.
- 3D Guide Wheel Installation: For complex three-dimensional welding paths.
6. Operation
The HK-7WF welding machine is designed for versatile welding applications. Ensure all connections are secure and the workpiece is properly prepared before operation.
6.1 Applicable Welding Types
The HK-7WF supports a variety of welding configurations:

Figure 6.1: Examples of welding applications for the HK-7WF.
- Flat Fillet Welding: For joining two pieces of metal at a right angle.
- Vertical Fillet Welding: For vertical joints.
- Plane Butt Welding: For joining two pieces in the same plane.
- Horizontal Welding: Welding along a horizontal axis.
- Vertical Welding: Welding along a vertical axis.
- Tank Welding: Suitable for external and internal tank welding with a minimum diameter R ≥ 1500mm.
- Curve Welding on 3D Track: For complex curved surfaces using appropriate guide rails.
6.2 Operational Demonstration
Watch the video below for a demonstration of the HK-7WF welding machine in action, performing various welding tasks.
Video 6.1: Demonstration of the HK-7WF Pipeline Automatic Welding Machine.
7. Maintenance
Regular maintenance ensures the longevity and reliable performance of your HK-7WF welding machine.
- Cleaning: Regularly clean the machine, especially the guide wheels, torch holder, and control box, to prevent dust and debris buildup.
- Cable Inspection: Check all cables and connections for wear, damage, or loose fittings before each use. Replace any damaged components immediately.
- Lubrication: Ensure moving parts, such as the guide wheels and torch oscillator, are adequately lubricated according to manufacturer recommendations (if applicable, refer to specific product documentation for details).
- Storage: Store the machine in a dry, clean environment away from extreme temperatures and corrosive substances.
8. Troubleshooting
This section provides solutions to common issues you might encounter with your HK-7WF welding machine.
| Problem | Possible Cause | Solution |
|---|---|---|
| Machine does not power on | Loose power connection, power supply issue, faulty switch | Check power cable and connections. Ensure power source is active. Verify switch functionality. |
| Irregular welding path | Guide rails not properly installed, debris on rails, worn guide wheels | Re-install guide rails securely. Clean rails. Inspect and replace worn guide wheels. |
| Poor weld quality | Incorrect welding parameters (speed, oscillation), improper torch position, material contamination | Adjust welding speed, oscillation angle, and stay time. Verify torch alignment. Ensure workpiece is clean. |
| Machine stops during operation | Overload, power interruption, internal fault | Check for obstructions or excessive load. Verify stable power supply. If problem persists, contact support. |
If you encounter issues not listed here or if the suggested solutions do not resolve the problem, please contact customer support.
9. Warranty
The HK-7WF Pipeline Automatic Welding Machine comes with a 1-year warranty. This warranty covers manufacturing defects for both the machine and its core components (e.g., motor). Please retain your purchase receipt for warranty claims.
10. Support and Contact Information
For technical assistance, inquiries, or support, please contact us:
- WhatsApp: +86 18973113160
- Email: nikikung3@gmail.com
Our support team is available to help you with any questions or issues regarding your HK-7WF welding machine.