Customer Background and Requirements

The customer is a manufacturer specializing in high-quality speaker systems, offering multiple product lines including 8-inch, 12-inch, and 15-inch speakers. Within the assembly line, the screw-tightening process plays a critical role, directly affecting structural durability, mechanical stability, and ultimately the acoustic performance of the finished product.

Previously, screw inspection relied mainly on manual checks performed by operators. Although standard operating procedures were in place, maintaining consistent quality remained challenging—especially as production volumes increased or when multiple speaker models were assembled in parallel. As a result, the customer sought a solution to automate the inspection process, reduce dependence on human labor, and maintain line speed without compromising quality.

Challenges

During daily operations, the customer encountered several key challenges:

• Human error: Visual inspection is prone to oversight, particularly in high-volume production or continuous shift work.
• Lack of real-time traceability: There was no immediate way to confirm that every screw had been properly tightened before the product moved to the next stage.
• Product model variability: Each speaker size (8”, 12”, 15”) requires a different number and arrangement of screws, making manual or semi-automated inspection methods inflexible and inefficient.

These issues led to defective products slipping through the line, increased rework costs, and a negative impact on customer experience.

Solution

To fully address these challenges, the customer deployed an AI-integrated collaborative robot solution from Techman Robot. The solution combines industrial vision and artificial intelligence to perform fully automated screw inspection directly on the assembly line.

An industrial camera was installed above the line, providing a top-down view of the product. Once the screw-tightening process is completed, the cobot triggers the camera to capture an image of the speaker assembly. The captured image is then analyzed by the AI model, which classifies the result and detects missing screws or screws that are not properly tightened.

A key advantage of this solution is the extremely short AI training time. With just a few minutes of training using datasets of OK and NG products, the system can be deployed quickly. When an NG product is detected, an immediate alert is issued to the operator, ensuring that defective units do not proceed to the next production stage.

Achieved

After implementing the solution, the customer observed significant improvements in quality control:

• A substantial reduction in human-related errors, especially in post–screw-tightening inspection
• Real-time automated inspection without impacting production throughput
• Lower costs associated with rework and customer complaints, thanks to immediate defect detection
• Improved process stability and standardization, creating a solid foundation for future production scaling

By combining collaborative robots with AI, the solution ensures consistent product quality while optimizing the inspection process, enabling more efficient and sustainable operations.

As manufacturers increasingly demand higher quality, stability, and scalability, AI- and cobot-based solutions are becoming a practical and effective choice for modern factories.

Temas is the authorized distributor of Techman collaborative robots in Vietnam, with extensive experience in deploying robotic solutions for manufacturing and assembly. If your business is looking for an intelligent, flexible, and easy-to-deploy quality inspection solution, contact us, Temas is ready to partner with you and recommend the most suitable approach for your specific factory challenges.