关键词: 座椅横梁；在线检测；通止规；PLC

Abstract: The automotive seat crossbeam as a key structural component connecting the vehicle body offline manual inspection. This paper details the system's basic structure and workflow, and validates its effectiveness through practical application. The results show that the solution achieves 100% online inspection, high inspection efficiency, a low false rejection rate, and significant economic benefits, while effectively ensuring product quality. It provides a solution with both engineering practicality and theoretical reference value for the online dimensional inspection of critical holes in automotive components, enriching the technical approaches for in-process inspection in automated production lines. and the seat, the positional dimensional accuracy of the mounting holes on the automotive seat crossbeam assembly directly affects seat assembly performance, necessitating 100% full inspection. To address the issues of low efficiency, inspection lag, and high cost associated with manual inspection, and considering the technical requirements of automated manufacturing and in-process inspection, this paper proposes a mechanical pin-type online full inspection solution suitable for automated welding production lines. Based on the go/no-go gauge principle and integrated with programmable logic controller (PLC) control technology, the proposed solution synchronizes the inspection process with the production cycle, thereby overcoming the limitations of traditional

Key words: seat crossbeam; online inspection; go/no-go gauge; PLC