Y-axis driving device of heavy horizontal turn-milling center

The invention discloses a Y-axis driving device of a heavy horizontal turn-milling center. The device comprises a stand column, a milling mechanism and a Y-axis speed reducing mechanism; wherein the stand column is provided with a longitudinal rail; the milling mechanism comprises a sliding plate matched with the longitudinal rail, a speed reducing mechanism and a milling head which are arranged on the sliding plate, and a hydraulic locking mechanism which is arranged on the sliding plate and acts on the longitudinal rail, and the speed reducing mechanism is connected with the milling head; and the Y-axis speed reducing mechanism is arranged on the stand column, connected with the milling mechanism and used for driving the milling mechanism to move up and down. The stability of the millinghead during operation can be improved, and the machining precision is effectively improved. 本发明公开了一种重型卧式车铣中心Y轴驱动装置；该装置包括立柱、铣削机构和Y轴减速机构；其中，立柱设有纵向轨道；铣削机构包括与纵向轨道配合的滑板、设在滑板上的减速机构和铣削头，以及设在滑板上并作用于纵向轨道上的液压锁紧机构，所述减速机构和铣削头连接；Y轴减速机构设在