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Tool holder manufacturers believe that in recent years, high-speed machining technology has been widely promoted and applied in the field of parts processing and mold manufacturing. At the same time, high-speed machining machine tools put forward higher requirements for the corresponding tool clamping technology and equipment (such as tool handles, etc.), and the requirements for dynamic balance are also very high. Not only the spindle assembly requires precision dynamic balance (G0.4 or above), the tool and clamping mechanism also need precision dynamic balance. However, the key and keyway that transmit torque can easily destroy the dynamic balance. However, the standard 7/24 taper shank is longer and it is difficult to achieve a full-length clearance-free fit. Generally, it only needs to be in contact with more than 70% of the front section. Therefore, there will be a certain gap in the rear section of the mating surface, which will cause the radial runout of the tool and affect the dynamic balance.

Tool holder manufacturers believe that under the conditions of high speed and high eccentricity, the double-sided clamping handle (HSK) is more closely combined with the spindle, and has greater rigidity, which has achieved remarkable results in improving processing efficiency. However, when the spindle speed reaches 30000 r/min or more, the spindle, tool holder and tool should have high concentricity and dynamic balance when rotating. Otherwise, the higher the speed, the greater the centrifugal force. When the critical state of the system is reached, the tool holder and the tool system will be activated. As a result, the processing quality is reduced, the tool life is shortened, and the spindle bearing is severely worn or even damaged.

Tool holder manufacturers believe that tool clamping technology has always focused on progress. Because the double-sided clamping tool system is difficult to make a new breakthrough in high-speed and high-precision machining, in order to improve the connection accuracy of the tool, the tool holder and the spindle, the HSK tool holder and the hot-loaded tool clamping system instead of the spring clamping and side fixing system More and more attention has been paid.

Tool holder manufacturers believe that thermal expansion systems usually use thermal induction coils to heat the clamping part of the tool holder in a short period of time, so that the inner diameter of the tool holder expands accordingly. At this point, the tool immediately into the handle, the handle cooling contraction, can give the tool clamping surface with uniform pressure, resulting in a higher radial clamping force, the tool clamping firm. Therefore, the thermal expansion system is a heat-loaded tool clamping method that does not involve any substance between the tool and the handle. It can solve the important problems such as balance, swing accuracy and clamping force in high-speed and high-finish machining.

The tool holder manufacturer believes that the thermal expansion system adopts induction heating, which is characterized by: through purposeful heating, tool replacement can be completed in a few seconds; Through the selection of materials and appropriate process methods, the service life of the fixture is improved. High strength, huge tension; Simple operation, safe and reliable; Suitable for clamping hard alloy steel and high-speed alloy steel; High-strength clamp; Combined with accessories, the machine has a wide range of applications; circumferential runout less than 0.003mm.