我厂自行设计制造的履带销半自动中频淬火机床(见图1),自1973年投产以来,已生产履带销40余万件。生产实践表明,该机结构简单、性能可靠、调整、操作方便、生产效率较高,适合大批量流水线生产。 Our factory designed and manufactured semi-automatic medium-frequency quenching machine for track pin (see Figure 1). Since it was put into operation in 1973, it has produced more than 400,000 crawler pins. Production practice shows that the machine is simple in structure, reliable in performance, easy to adjust, easy to operate, and high in production efficiency. It is suitable for large-scale assembly line production.