How to process threads on a common lathe?

Attention should be paid to the problem of incorrect pitch diameter of ordinary lathe

1. often measure the pitch diameter?

2. Use the dial correctly?

2

Pay attention to the problem of inaccurate pitch.

1. Turn a shallow spiral on the workpiece first, and measure whether the screw spacing is correct?

2. Adjust the axial series momentum of the spindle and screw and the gap between the opening and closing nuts?

3. Hang a heavy object on the handle of the opening and closing nut to prevent it from being lifted halfway?

three

Attention should be paid to the problem of incorrect tooth profile of ordinary lathe

1. Sharpen and measure the turning tool angle correctly?

2. When loading the knife, use the template to align the knife?

3. Reasonable selection of cutting parameters and timely sharpening of turning tools.

four

Attention should be paid to the problem of large surface roughness of ordinary lathe

1. When cutting with high-speed steel turning tool, the cutting speed should be reduced and cutting fluid should be added.

2. Increase the cross-sectional area of the arbor and reduce the protruding length (because the arbor is not rigid enough, it is easy to vibrate when cutting)?

3. Reduce the longitudinal rake angle of the turning tool and adjust the clearance of the screw nut of the middle slide plate (if the longitudinal rake angle of the turning tool is too large, the screw nut of the middle slide plate will be easily punctured)?

4. When cutting the thread at high speed, the cutting thickness of the last pass is generally greater than 0. 1mm, and the chips are discharged in the direction perpendicular to the axis (when cutting the thread at high speed, the cutting thickness is too small or the chips are discharged in the oblique direction, which is easy to make the thread flank hairy)?

5. Reasonable selection of cutting parameters of common lathe?