WK—4型挖掘机是我国露天矿广泛使用的重要采掘设备之一,它的同类型有 D—4,W—4,ЭКГ—4,W—3,СЭ—3等型号挖掘机。其推压齿轮和牙条的齿数与模数都是相同的。不少应用这些设备的露天矿反映推压齿轮的使用寿命短,消耗量较大。一般的损坏现象是齿易磨尖和掉牙。使用寿命在三个月左右,有的甚至用不到一星期就掉了牙。严重地影响了矿山生产。为了更好地为矿山服务,不 WK-4 excavator is one of the most important mining equipment widely used in surface mine in our country. Its type is D-4, W-4, ЭКГ-4, W-3, СЭ-3 and other excavators. The number of teeth and the modulus of pushing the gear and the teeth are the same. Many open-pit mines that use these devices reflect the short service life of push gears and consume a large amount of fuel. The general phenomenon of damage is tooth easy to sharpen and tooth loss. Life in about three months, and some even lost teeth in less than a week. Seriously affected the mine production. In order to better serve the mine, no