機(jī)械數(shù)控外文翻譯---普通車床的主軸箱-數(shù)控設(shè)計(jì)(編輯修改稿)
2025-02-24 06:10 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 urns. The step pulley and pinion gear are connected with the bull gear by a sliding pin called the bullgear lockpir. At the back of the headstock are two gears mounted on the same shaft. They are spaced to line up or mesh with the bull gear (F) and pinion gear (E). These are called back gears. To engage the back gear, the pin in the bull gear is pulled out (when the pin is out, the pulley and pinion gear will turn, but the spindle will not turn). Pull the back gear handle forward to mesh the back gears with bull gear F and pinion gear E. Do this by turning the step pulley by handnever while the power is on. When engaged, power is delivered directly to the bull gear (F) and spindle by the back gears. At the left end of the headstock assembly is a feed reverse lever. It is used for reversing, the direction or movement of the lead screw. This lever can be moved to three positions. When it is in the upper position with the automatic feed engaged, the carriage will move toward the headstock (to the left) and the crossfeed will move in. When in the center position, the gears are out of mesh and the lead screw will not move. When in the lower position with the automatic feed engaged, the carriage will move toward the tailstock (to the right) and the crossfeed will move out. Vbelt drive. A Vshaped groove is cut around the circumference of each pulley, and a V belt fits accurately into this groove. The V belt does not touch the bottom of the pulley. This type of drive ha
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