关键词: 高精度枪；螺栓连接；目标扭矩；扭矩控制；转角控制；再拧紧扭矩

Abstract: Bolt connection is the most common connection process in the assembly of white body door covers, and the reliability of bolt strength is one of the important guarantees for automotive safety. This article introduces the bolt connection assembly of metric ISO bolts suitable for automobiles and their components, as well as the installation tightening method used within the Volkswagen Group. It focuses on the technical requirements for bolt tightening in an advanced vehicle manufacturing plant, commonly used tightening tools, and differentiated tightening methods for various types of bolts. It also emphasizes the tightening detection technical specifications for bolts and nuts, the storage system storage method for tightening data, and the specific requirements for data storage. Ensure the accuracy of tightening results and the reliability of data, as well as possible quality traceability in the future. Familiarity with the system and mastery of the vehicle bolt tightening control scheme, as well as the optimization of tightening process quality by on-site quality personnel, play an important guiding role.

Key words: High-precision tightening gun; Bolt connection; Target torque; Torque control; Corner control; Reconfirm tighten torque