Application of carbide cutting tools in High-end Mold Profession

Unlike most of turning, milling and carbide cutting tools, tap the cutting edge of relatively weak, the overall strength is low. Even in relatively free cutting machining workpiece materials such as steel, hard alloy tap cutting edges are prone to collapse blade, cutting tool failure. On low carbon steel during tapping and continuous long chip may clog the tap crumbs slot, limiting the hard alloy tap is applied in some even more easily than steel tapping workpiece materials (such as aluminum and iron). Steel and other iron materials processing and assembling is one of the most common need with the material of screw hole, therefore, the cutting tool manufacturers are spare no effort to develop can prevent tap of cutting edge collapse and edge damage. Compared with cemented carbide and high speed steel is inherently performance advantages, therefore hard alloy tap has become a development focus.

 

Determines the size of the internal thread precision screw assembly of precision and suitability. When machining internal thread, tap usually by drilling or flexible tapping head of asynchronous machine drive, the flexible tapping head can be rotated to drive the tap, and close to the required rate of feed of inner screw thread. The old machine is difficult to accurately when tapping coordinate into the rotary motion, and this kind of collaborative is necessary condition of screw thread processing. Therefore, must use the flexible tapping head to control the error range. Flexible tapping, tapping head screw tap causes radial runout, limits the accuracy of screw thread. These factors lead to low rigidity and uneven load tap.

 

The successful application of tungsten carbide tap depends on carbide tool clamping rigidity and control precision of the feed. For most processing method, the processing conditions for granted. But for tapping, these conditions has just become a reality.

In recent years, machine tool control technology continues to advance, has been able to realize synchronous control of spindle rotation and feeding, and can no longer use flexible tapping head. In addition, the use of hot charging and the hydraulic tool holder can improve the tool clamping rigidity, the radial runout error is greatly reduced when using flexible tapping head. The tool clamping head rotates concentricity within (including 3 m. Although precision sleeve large clamping force and high precision (TGHP) the performance of the chuck, less hot charging type and hydraulic type tool clamp, but also very effective when applied in the tapping process.

 

Not all of the carbide cutting tools can achieve "synchronous" tapping (that is, the "rigid" tapping - when the spindle rotates by screw thread precision feed). Therefore, in order to allow a trace of axial displacement to compensate synchronous tapping machine inherent small error, need for hot charging type, hydraulic type and sleeve TGHP tool chuck was improved.