The principle of heat shrink tool holder is to use the difference in thermal expansion coefficient of the tool holder (special tool steel) and the tool (tungsten carbide or high-speed steel) to powerfully and accurately clamp the tool. The accuracy of the heat shrink tool holder is <3μm, which is no less accurate than the hydraulic tool holder. Heat-shrinkable knife handles generally need to be used with a heat-shrinking machine. The most commonly used heat-shrinking machine is an electromagnetic induction heat-shrinking machine.
Using an electromagnetic induction heat shrink machine to heat the heat-shrinkable tool holder can easily be installed according to the specifications of the stop plate corresponding to the clamping. The main purpose of the stop plate is to determine the heating position of the tool holder according to the clamping diameter.
When heating, the temperature of the area of the tool holder facing the induction coil is MAX high, and heat is conducted up and down the tool holder at the same time. When the tool holder expands (the expansion amount is usually about 3‰-5‰ of the clamping diameter), the tool can be installed. During the installation process, you can Use it together with the tool handle overhang length adjustment device, then cool to complete the tool installation.
It should be noted that although the heat shrink machine will be equipped with a manual heating mode, it is recommended that if you do not have very good control over the temperature, try to use the automatic heating program of the heat shrink machine (after fine-tuning the heating parameters of different tool holder suppliers) Storage), when using manual heating, due to the heat conduction time difference (0.5-1s) between the end surface of the tool holder and the induction position, when the end surface of the tool holder reaches the temperature and expands, the tool holder area of the induction coil is actually overheated, and the temperature frequently exceeding 500° will affect the heat shrinkable knife. The service life of the handle.
