Eight key points of die tapping machine

Die tapping machine is a kind of mechanical processing equipment that processes internal threads, screws or thread fasteners on the inner side of the holes of various through holes or blind holes with different specifications, such as machine shell, equipment end face, nuts, flanges, etc. Die internal tapping machine is also called tapping machine, thread die internal tapping machine, thread tapping machine, automatic die internal tapping machine, etc. Tapping points of die tapping machine:

1. The position of the workpiece clamp shall be correct, and the centerline of the threaded hole shall be placed at the horizontal or vertical position as far as possible, so that it is easy to judge whether the tap axis is perpendicular to the plane of the workpiece when tapping.

2. During tapping, the tap and screw hole shall be coaxial.

3. The orifice of the threaded bottom hole on the workpiece shall be chamfered, and both ends of the through-hole thread shall be chamfered.

4. When tapping a screw hole that cannot be tapped, always exit the tap to remove chips from the hole.

5. At the beginning of tapping, place the tap as straight as possible, then apply pressure to the tap and turn the winch. When cutting 1-2 turns, carefully check and correct the position of the tap. Generally, when cutting 3-4 turns of threads, the tap position should be correct. In the future, it is only necessary to turn the winch instead of applying pressure to the tap, otherwise the thread profile will be damaged.

6. When tapping with the die internal tapping machine, turn the cutter 1/2-1 circle, and then turn it back about 1/2 circle, so that the chips can be easily discharged after being broken, and the phenomenon that the cutting edge is jammed by the tap due to chip sticking can be reduced.

7. When the next tap is used during tapping, screw it into the tapped out thread and thread by hand first, and then turn it with the wrench when it cannot be screwed in again. When exiting after final taper tapping, it is also necessary to avoid fast rotation of the winch, and it is better to screw it out by hand to ensure that the quality of the tapped thread is not affected.

8. Cutting speed during machine tapping, generally 6-15 m/min for steel; 5-10m/min for quenched and tempered steel or harder steel; 2-7m/min for stainless steel; 8-10 m/min for cast iron. For the same material, the higher value shall be taken for smaller tap diameter, and the lower value shall be taken for larger tap diameter.