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Some common sense about thermal expansion tool holders, tool holder and tool holder manufacturers will help you solve your doubts
Release time:
2025-03-23
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Tool holder and tool holder manufacturers believe that in recent years, high-speed machining technology has been widely promoted and applied in the fields of parts processing and mold manufacturing. At the same time, high-speed processing machine tools have put forward higher requirements for corresponding tool clamping technology and equipment (such as tool holders, etc.), and the requirements for dynamic balance are also very high.
Tool holder and tool holder manufacturers believe that in recent years, high-speed machining technology has been widely promoted and applied in the fields of parts processing and mold manufacturing. At the same time, high-speed processing machine tools have put forward higher requirements for corresponding tool clamping technology and equipment (such as tool holders, etc.), and the requirements for dynamic balance are also very high. Not only the spindle assembly requires precision dynamic balancing (G0.4 or above), but the cutting tools and clamping mechanism also require precision dynamic balancing. However, the keys and keyways 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 gap-free fit. Generally, it only needs to fit more than 70% of the front section. Therefore, there will be a certain gap in the rear section of the mating surface, causing radial runout of the tool and affecting dynamic balance.
Toolholder and toolholder manufacturers believe that under the conditions of high speed and high eccentricity, the double-sided clamping toolholder (HSK) is more closely integrated with the spindle and has greater rigidity, which has achieved significant results in improving processing efficiency. But when the spindle speed reaches more than 30,000 r/min, the spindle, tool holder and tool should have high concentricity and dynamic balancing capabilities 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 tool system will be activated. As a result, the processing quality is reduced, the tool life is shortened, and the spindle bearings are severely worn or even damaged.
Toolholder and toolholder manufacturers believe that tool clamping technology is always focused on progress. Since it is difficult for double-sided clamping tool systems to achieve new breakthroughs in high-speed and high-precision machining, in order to improve the connection accuracy of tools, tool holders and spindles, HSK tool holders and shrink-fit tool clamping systems replace spring clamping and side fixing systems. come to receive more and more attention.
Tool holder and 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, causing the inner diameter of the tool holder to expand accordingly. At this time, the tool is immediately loaded into the tool holder. When the tool holder cools and shrinks, it can apply uniform pressure to the clamping surface of the tool, thereby generating a high radial clamping force and clamping the tool firmly. Thermal expansion system is therefore a thermally loaded tool clamping method that does not involve any material between the tool and the handle. It can solve important issues such as balance, swing accuracy, and clamping force in high-speed and high-precision machining.
Tool handle and tool holder manufacturers believe that the thermal expansion system uses induction heating. Its characteristics are: through purposeful heating, tool replacement can be completed in a few seconds; through material selection and appropriate process methods, the service life of the clamp is improved; high Strength, huge tension; simple operation, safe and reliable; suitable for clamping carbide steel and high-speed alloy steel; high-strength clamp; combined with accessories, the machine has a wide range of applications; circular runout is less than 0.003 mm.
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