Figure 1 Four different tool holders form the basic components of Mapal's HSK assembly technology program
Mapal, based in Aalen, one of the first manufacturers, has developed a complete HSK mounting technology program for lathes and milling machines with rotating devices. This technology has considered the future HSK-T standard and can achieve the necessary high clamping force. The four different tool holders shown in Fig. 1 are the basic components of this new clamping technique. These components can be mounted on the tool holder with which the machine tool is to be used. Although these four components are different in appearance, they all have a large axial channel. With this type of tool holder and tool, on the one hand, the path of the cooling lubricant can be optimized. On the other hand, additional functional elements can also be introduced. For example, this makes it possible to mount a powered tool on a rotating device with a manual clamp, which has a great clamping force. Sometimes this clamping force is even twice the required clamping force specified in the HSK-T standard (as shown in Figure 2). The machining of the highest precision and the machining starting from the smallest diameter hole all require the complete elimination of the protruding device tolerances. In order to introduce this type of machining, Mapal offers a system that can ensure the precise position of the rotary cutting. An additional option is provided to integrate this system with tool safety protection. When the HSK tool holder is not clamped, the tool does not slip from the tool holder into the machine. Reduce accident risk. The tool is protected. Details of HSK Clamping Process The new Mapal Cutter is described in detail as follows: Front Clamp Mounting Flange A sturdy clamp provides a strong connection and great rigidity. The clamping force is a constant and much higher than the standard. Tool change is assisted by a mounting bracket that can rotate more than 65 degrees around the axis. The mounting structure of this mounting bracket is designed to be very short. High rigidity and strong connection of the raised jig mounting flange are achieved through a firm clamp. The clamping force of this clamp reaches and exceeds twice the value specified in the standard. Tool change is accomplished with the help of a wrench that rotates more than 50 degrees around the axis. Its shape is slim and slender. Automatic Fixture Mounting Flange This fixture, which has a hydraulic pressure of less than 50 bar, can also achieve a clamping force that is twice the standard value. A small hydraulic cylinder was refitted to the rear of the HSK. The tool change can be easily accomplished by pressing a button. Its structural design is very compact. This tool holder introduced by the axial fixture mounting flange is parallel to the shaft. The tool change is achieved by a sleeve nut rotating from the rear to the shaft. The clamping force is much higher than the standard value, but the torque is very small. Because the tool holder with axial fixture has only axial fixture movement. So it's wear is very small, and the situation is quite high.
The clamping force of some new fixtures in Figure 2 is twice that specified in the HSK-T standard