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公园客运索道上的大链轮(见图1),材料为45钢,节距15.875mm,节圆齿厚8.7~(-0.25)mm、齿数103、节圆直径520.56mm、齿顶硬度HRC40～45。选用圆钢制成的轴套和钢板制成的链轮,焊接并经高温消除应力后,切削加工到成品尺寸,然后齿部淬火。对于这种大链轮齿部淬火,如果有大功率的感应加热设备,或有较完备的火焰加热设施,难度就小多了。但我们都不具备,经过反复设想,终于找到一条适合我们现有条件的途径。我们叫它
Park passenger ropeway on the large sprocket (see Figure 1), the material is 45 steel, pitch 15.875mm, pitch tooth thickness 8.7 ~ (-0.25) mm, the number of teeth 103, pitch diameter 520.56mm, addendum hardness HRC40 ~ 45. Selection of round steel shaft sleeve made of steel and sprockets, welding and high temperature stress relief, cutting to the finished size, and then quenched tooth. For such a large sprocket tooth quenching, if there is a high-power induction heating equipment, or a more complete flame heating facilities, the difficulty is much smaller. However, we do not all have the means to finally find a way that suits our existing conditions through repeated planning. We call it