Thread is an indispensable process for screw-type workpiece processing, and the material of screw-type workpiece is generally hard, which often causes tool wear and tear, and tool chipping needs to be re-clamped and re-calibrated. The quality of the tool on the tool affects the accuracy of turning threads. If the problem of tool setting during the machining process cannot be well solved, the thread cutting operation of the machining center cannot be applied well.

Processing principle of thread cutting

The thread cutting process of the CNC machining center is carried out by sending a pulse signal into the CNC system through the encoder installed on the main shaft, and sending an instruction to control the servo motor to control the movement of the tool through the ball screw. Problems existing in thread cutting tool setting

Under normal circumstances, when the thread cutter is clamped for the first time, the rotation of the thread cutter tip and the workpiece will be unequal. Long, it will cause vibration during processing, and the vibration of the tool directly affects the roughness and smoothness of the thread surface.

For threaded parts with high machining accuracy or trapezoidal threading process, two thread cutters are required for rough machining and fine machining respectively. If the offset between the two cutters is large, the pitch diameter of the thread will become larger and the production will be scrapped.

Specific solutions

Keep the same height between the thread tool tip and the workpiece rotation center

After the tool is sharpened, the tool is set on the axis of the workpiece to keep the tool tip angle installed correctly. If you use a CNC machine to clamp the tool, generally you only need to hold the tool holder against the side of the tool holder.

Trial cutting method

In the actual tool setting process, the trial cutting method is used, and a reference point is set for the rough machining and finishing thread cutter tool setting, and it is very convenient to adjust the tool compensation.

Note that the location of the re-installation coincides

In thread processing, if the tool is worn or chipped, it is necessary to re-sharpen the tool and then set the tool. If the workpiece is not removed for repair, it is only necessary to overlap the position where the thread cutter is installed and the position before removal, which is equivalent to the same Machining the tool.

The thread cutting and tool setting of the machining center is very important, and the selection of the thread cutter and rebar material must be perfect, only in this way can a qualified threaded workpiece be processed.

However, the premise of these is accurate tool setting. Many manufacturers believe that tool setting is difficult because there is no complete tool setting method. Errors will inevitably occur only based on the operating experience of the master who operates the machine, so accuracy cannot be guaranteed. The purpose of the tool setting is to establish the workpiece coordinate system. To put it simply, tool setting is to establish the position of the workpiece on the worktable of the machining center, that is, the coordinate position of the tool point on the coordinate system of the machining center. For the machining center, the tool setting point must be selected first before processing. The tool setting point refers to the starting point of the movement of the tool relative to the workpiece when the machining center is working. The tool setting point can be set on the fixture or equipment, or on the workpiece.

Conclusion

For more information about cnc engraving near me,cnc mill turn,precision cnc machine shop, we are glad to answer for you.