The utility model discloses a lathe for
machining a large long hole, and relates to the technical field of
machining equipment. A
headstock is mounted at the head of the lathe
bed, a
tailstock is mounted at the
tail of the lathe
bed, a slide
carriage box is mounted in the middle of the lathe
bed, a first transition piece is mounted between the bottom of the
headstock and the lathe bed, a second transition piece is mounted between the bottom of the
tailstock and the lathe bed, a workpiece clamp is mounted on the top of the slide
carriage box, and a workpiece is clamped in the workpiece clamp. One end of the cutter is connected with the
tailstock, and the other end of the cutter is connected with the four-jaw chuck of the
headstock after penetrating through the workpiece. The
machining mode of workpiece rotation of a traditional lathe is changed, and a brand new machining mode that a workpiece is fixed and a cutter rotates is adopted. The vibration and
centrifugal force influence caused by rotation of the workpiece is reduced, so that the cutter can more efficiently
cut and process a large long hole, and the efficient
processing requirement of a large batch of sleeve type aluminum product workpieces with specific specifications can be fully met.