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With the continuous development of the automotive industry and the increasing demand of consumers for driving and riding experiences, the functional positioning of automotive seats is not only to meet basic seating and decorative needs but also to ensure the comfort and safety of passengers during driving. Therefore, the tightening quality in the bolt assembly process of automotive seats is particularly emphasized to ensure that the seats remain in a stable position during emergency braking or collisions, thereby enhancing driving safety.

1. Automated Screw Feeding and Tightening System

The space for tightening positions in the automotive seat frame is often narrow and subject to interference, which increases the difficulty of bolt tightening operations. This is especially true in compact car models, where assembly difficulty is further increased.

Solution: A stepwise screw feeder combined with a vacuum screw picking method is used. The screw feeder can be equipped with a length detection module to prevent screw mixing and avoid tightening failures. The screw picking module can select the corresponding avoidance distance based on the interference situation, ensuring a smooth screw feeding stroke. Compared to magnetic picking, vacuum adsorption is more stable and efficient, ensuring the success rate of screw alignment, alignment speed, and hole-finding capability, while monitoring the screw's position.

For tightening positions without interference, a blow-and-tighten module can be used. This method has a simple action logic and can effectively increase the screw feeding and tightening cycle.

Additionally, for tightening scenarios involving seat rails, nut tightening is required. A stepwise screw feeder can automatically convey nuts, combined with a vacuum picking method, to achieve automated nut assembly.

2. High-Precision Tightening Tools

Seat bolt tightening, as an A-level assembly task with the highest safety requirements, demands extremely strict precision and quality. Any tightening abnormalities can lead to serious safety hazards.

Solution: High-precision sensor-based tightening tools are used, which precisely control torque to enhance tightening quality. These tools offer multiple strategies and can monitor the entire tightening process through upper and lower limit settings for torque, angle, or time, promptly detecting issues such as floating high and stripped threads. They also feature data recording and storage capabilities, facilitating the tracking of each screw's tightening state and providing robust data support for assembly quality control.

3. Flexible Feeding System

In the assembly process of automotive seats, the automatic feeding of components such as pins and rails is also crucial. However, traditional sheet metal methods can lead to material wear, difficulty in changing material types, and large space occupation, affecting the optimization of the layout.

Solution: A flexible vibratory feeder is used for feeding, employing a high-molecular material tray. The gentle vibration prevents material jams and damage, and it can accommodate various shapes, materials, and sizes of components, flexibly adapting to the feeding needs of different products and production lines.

Additionally, for long-sized rail materials, the flexible vibratory feeder can not only handle the length of the rails but also use vision recognition to correctly orient and distinguish the front and back sides of the rails, ensuring accurate feeding.