1. Welding technology
(1) How do you check for welding defects?
We check welding defects through a combination of visual inspection, dimensional inspection, and non-destructive testing methods such as X-ray, ultrasonic testing, or phased array testing, depending on the product requirements. For critical components, metallographic examination, mechanical testing, leak testing, and burst testing can also be carried out to further verify weld quality and internal integrity.
(2) What is the maximum thickness in friction stir welding?
The maximum weldable thickness in friction stir welding depends on the material type, joint design, equipment configuration, and process parameters. Based on AEE’s current technical capability and application experience, the welding depth can reach up to 100 mm for aluminum and 35 mm for copper. The actual achievable thickness for a specific part should be confirmed through technical evaluation and welding trials according to product requirements.
(3) How effective is friction stir welding?
Friction Stir Welding (FSW) is a solid-state joining process that requires no filler material, no shielding gas, and generates virtually no welding fumes. Supported by high-precision tool systems and rigid clamping solutions, FSW delivers stable weld quality and excellent process consistency.
(4) Why is Friction Stir Welding ideal for automated production?
FSW is well suited for automated production due to its high efficiency, stable welding performance, and strong integration capability. It can be easily integrated with automatic loading and unloading, online inspection, and robotic systems, making it ideal for efficient and reliable automated manufacturing.
(5) Why Choose Friction Stir Welding (FSW)?
FSW is a preferred joining solution for components that require high strength, excellent sealing, and reliable pressure resistance. For parts where conventional welding processes cannot fully meet performance requirements, FSW provides a cleaner, stronger, and more stable alternative. With its ability to deliver leakproof parts, excellent weld consistency, environmental benefits, and long-term cost savings, FSW is an ideal choice for advanced lightweight and modern manufacturing.
(6) What materials are suitable for Friction Stir Welding (FSW)?
FSW is suitable for a range of non-ferrous metals, especially aluminum alloys, copper alloys, magnesium alloys, and titanium alloys. The actual applicability depends on factors such as material grade, thickness, joint design, and welding requirements.
(7) How to fill the exit hole of the FSW welded material?
The treatment of keyhole defects shall be determined according to product structure and specific quality requirements.
Common solutions include adopting keyhole bosses or run-off plates, applying retractable stirring tools, and performing manual repair welding for filling and smoothing where applicable.
The final approach shall be selected based on joint configuration, sealing performance and relevant acceptance criteria.
2. FSW tools
(1) What is the function of the pin tool in friction stir welding?
The pin tool is one of the core components in the FSW process. Under high-speed rotation, it contributes to heat generation, disrupts the oxide layer along the faying surface, promotes the mechanical stirring and mixing of plasticized material, and guides the material to flow in a defined pattern. As a result, it directly affects weld quality, joint performance, and process stability.
(2) Can we use same tool to weld copper and aluminum?
In general, using the same tool for both copper and aluminum is not recommended. Copper and aluminum have very different thermal conductivity, softness, strength, and wear characteristics, so the optimal tool material, pin design, shoulder design, and process parameters are usually different. For stable welding quality and longer tool life, dedicated tools should be selected for different materials.
(3) What is the lifetime of the pin tool?
The service life of the pin tool varies with the welding material, thickness, joint configuration, welding parameters and production conditions. With proper tool design and optimized process parameters, stable and reliable tool life can be achieved. We can provide tool life evaluation and application-based recommendations according to specific project requirements.
(4) Is there a standard pin or shoulder design for all FSW applications?
Standards such as ISO 25239 and AWS D17.3 do not define one universal pin or shoulder design suitable for all applications. In practice, FSW tool design must be selected and optimized according to the product structure, welding depth, material type, and specific process requirements. In other words, the geometry, dimensions, and material of the pin and shoulder are application-specific and should be designed based on the actual welding task.
3. Process or control of FSW machine
(1) How to manage the force with the FSW head during FSW operations?
The axial force during FSW operations is managed through a combination of internal monitoring and external sensing systems. Our FSW head is equipped with monitoring and feedback functions such as constant displacement and constant torque control, while external pressure sensors are used to monitor the welding load, helping ensure process stability and consistent weld quality.
(2) How can I assure the quality of my FSW weld?
To ensure weld quality, AEE selects suitable FSW tools and welding parameters according to the material, structure, and joint configuration of the product before welding. Stable clamping solutions are also applied to support the welding process. After welding, relevant inspections and tests are carried out to verify weld quality and ensure the final product meets application requirements.
4. FSW Machine
(1) Is your FSW equipment able to weld 3D curvature structures ?
Yes. We have the capability to deliver FSW solutions for 3D double-curvature structures, and we have successfully completed similar projects in the domestic market.
(2) Can FSW machine be adapted for complex 3D weld paths?
Yes. FSW has been widely applied to both 2D and 3D welding paths. For complex 3D weld path applications, the feasibility and machine configuration should be evaluated based on the part geometry, weld path shape, and required welding depth.
(3) What is the lifetime of the FSW spindle?
Under normal operating conditions, its typical service life is generally 3 to 5 years. The lifetime of an FSW spindle depends on actual operating conditions, application intensity, and maintenance practice. With proper use and standard maintenance, the spindle is designed to deliver long-term and stable performance.
(4) Can we make the milling operation without making dissasembly of the spindle?
Yes, it is technically possible. However, this approach usually involves higher operating difficulty and cost. For better performance and process reliability, milling is generally recommended to be equipped with a dedicated milling tool or corresponding configuration. AEE can provide proven and complete solutions based on specific milling operation requirements.
(5) Can the same spindle support both welding and machining operations?
No. Due to the working principle of friction stir welding, the FSW spindle is typically designed with a tilt angle, while a machining spindle generally operates without tilt. Because of this fundamental difference in spindle configuration and process requirements, one spindle system cannot normally support both welding and machining operations at the same time.
(6) What is your intelligent toolholder？
Intelligent toolholder, is a tool holder that integrates sensing, data acquisition, and communication functions into a conventional holder. In addition to clamping the tool and transmitting torque, it can monitor machining or welding conditions in real time and provide functions such as abnormality alarm, parameter optimization, and process traceability.
(7) What is the intelligent toolholder’s benefit?
An intelligent toolholder can monitor and collect key welding parameters in real time, such as force, torque, temperature, and resistance. It is mainly used in laboratory environments, process development, and welding trials, where detailed data acquisition and process analysis are required.
5. Application
(1) What are the main applications of FSW in rail industry?
In the rail industry, the main applications of FSW are large aluminium structural panels for rolling stock, especially roof panels, side wall panels, floor panels, and other carriage body or underframe structures. FSW has already been commercially applied to aluminium roof, side wall, and floor panels for suburban and high-speed train applications, where low distortion, good weld quality, and improved structural performance are important.
(2) What are the main applications of FSW in automotive industry?
In the automotive industry, FSW is widely used for lightweight aluminum components and high-reliability structural parts. Typical applications include motor housings, electrical control housings, battery trays, conductive busbars, wheels, accumulator, and thermal management or heat dissipation housings. FSW is especially suitable for applications that require high weld quality, low distortion, good sealing performance, and stable automated production.
(3) What are the main applications of FSW in electronic and micro-mechanical assemblies industry?
FSW is widely used in the 3C electronics industry for products such as mobile phone housings, smart wearable device enclosures, tablet housings, and other lightweight precision structural components.
6. Others
(1) What kind of after-sales service do you offer?
We provide comprehensive quality assurance and after-sales service for our equipment. The complete machine is covered by a 12-month warranty from the date of acceptance and handover. During the warranty period, if any problem with the equipment or its accessories is caused by manufacturing quality, we will provide repair or replacement free of charge.
If any quality issue is reported during operation, we will respond promptly during working hours and arrange technical support as quickly as possible. When on-site service is required, our professional service team will be dispatched as soon as possible and will continue support until the issue is resolved.
After the warranty period, we will continue to provide necessary technical support, on-site maintenance assistance, and spare parts supply, while ensuring long-term availability of high-quality spare and wearing parts at reasonable prices.