1. Installation of CNC lathe workpiece

 1. Do not insert any tools into the taper hole of the main shaft and the taper hole of the tailstock sleeve before they are wiped clean.

 2. When machining precision shaft parts between the tops, the concentricity between the tailstock and the main shaft must be found out with a test object, and it can also be measured with a test rod.

 3. Use a chuck to clamp the workpiece. When the ratio of the length to the diameter of the cantilever exceeds five times, the other end should be supported by the top.

 2. CNC lathe process and operation

 1. When rough turning the outer circle, the tool tip of the turning tool should be slightly higher than the center of the shaft.

 2. When rough turning the outer circle of the hard workpiece, the tool tip should be slightly lower than the center of the shaft to avoid bending the turning tool and the phenomenon of anti-tooling.

 3. When finishing the outer circle, the tool tip should be the same height as the center line or slightly higher, but it is not allowed to be lower than the center line.

 4. For the parts positioned with the center hole, the top hole must be wiped clean when clamping, and grease or lubricating oil must be applied when the dead top is used.

 5. When drilling a solid hole, the end face must be finely turned, and the pilot hole should be drilled with a center drill first; when drilling a deep hole, a short drill must be used to top drill or a pilot hole should be bored.

 6. When drilling castings and forgings with blank holes, rough boring should be done first.

 7. When fine boring, do not stop before the tool position pushes out the workpiece.