Aluminum alloy machine tool/engraving machine tool holder

Aluminum alloy machine tool / precision engraving machine tool holder is an important component connecting the machine tool spindle and tool
Material properties:
advantage:
Light weight: The density of aluminum alloy is about 2.7g/cm³, which is much lower than steel, which makes the tool handle significantly lighter. During the high-speed operation of the machine tool, a lighter tool holder can reduce the impact of inertial force on the machine tool spindle, reduce the load on the machine tool, improve processing efficiency and accuracy, and also facilitate installation and replacement by the operator.
Good rigidity and strength: Although the absolute strength of aluminum alloy is lower than that of high-strength alloy steel, through reasonable structural design and optimized manufacturing process, aluminum alloy tool holders can have sufficient rigidity and strength to withstand machine tool processing. The cutting force and vibration during the process ensure the stable clamping of the tool and normal cutting.
Good corrosion resistance: Aluminum alloys easily form a dense oxide film in the air. This oxide film can prevent the internal aluminum alloy from being further oxidized, giving it good corrosion resistance. In the machine tool processing environment, it can resist the erosion of cutting fluids, lubricants and other chemical substances, extending the service life of the tool holder.
shortcoming:
Relatively low hardness: Compared with some carbide or high-speed steel tool handles, the hardness of aluminum alloy is lower. During long-term use, the clamping part of the tool handle may be worn, affecting the clamping accuracy of the tool. and stability. Therefore, the tool holder needs to be inspected and maintained regularly, and replaced when necessary.
Poor high temperature performance: In high temperature environments, the strength and rigidity of aluminum alloys will decrease. In some cases where a large amount of heat is generated during high-speed cutting or machining, the aluminum alloy tool holder may not be able to maintain good performance and corresponding cooling measures need to be taken.
Structure type:
Side-fixed tool holder: suitable for clamping flat tool shanks such as quick drills, U drills, milling cutters, rough boring tools, etc. It has a simple structure and strong clamping force. The tool is placed into the tool handle, the flattened surface is aligned with the locking screw, and then the locking screw is tightened with a hexagonal wrench to fix the tool. However, the versatility is not good, and each type of tool handle can only be equipped with tools with the same handle diameter.
Spring chuck tool holder: mainly used for clamping straight-shank tools such as drill bits, milling cutters, taps, etc. The circlip has a certain amount of elastic deformation, usually the clamping range is between 0.5 - 32mm. This kind of tool handle is highly versatile and can be produced by all major tool manufacturers.
Hydraulic tool holder: It is a more advanced type of tool holder. Tightening only requires a pressurized bolt. When hydraulic oil pressure is generated in the bolt, the pressure is evenly transmitted to the steel expansion sleeve, and the expansion wall then compresses the tool. Its advantage is that the tool has high radial runout error accuracy and repeated positioning accuracy, which can be controlled below 3 μm; it can effectively prevent the vibration of the tool and machine tool, improve processing accuracy and quality; it has maintenance-free and anti-fouling functions, and the tool disassembly is simple convenient.
Powerful chuck tool holder: used for clamping straight-shank cutters and tools such as milling cutters and reamers. The clamping force is relatively large and the clamping accuracy is good. Tools with different shank diameters can be clamped by replacing different collets. However, during the machining process, the front end of the powerful tool holder has a larger diameter and is prone to interference.
Accuracy and stability:
In terms of accuracy: The manufacturing accuracy of aluminum alloy tool holders has an important impact on the processing accuracy. The high-precision aluminum alloy tool holder can ensure the accurate installation and positioning of the tool in the tool holder, reduce the radial runout and axial movement of the tool, thereby improving processing accuracy. For example, the radial runout accuracy of some aluminum alloy tool holders used in precision engraving machines can be controlled within a few microns.
In terms of stability: Aluminum alloy tool holders need to have good stability to ensure that the tool will not loosen or shift during the high-speed operation and cutting process of the machine tool. This requires that the tool holder has a reasonable structural design, sufficient clamping force, and a reliable connection with the machine tool spindle. At the same time, the dynamic balance performance of the tool holder is also very important. Good dynamic balance can reduce the vibration generated by the tool holder during high-speed rotation and improve the stability and surface quality of processing.

Machine tool processing: In various types of machine tool processing, aluminum alloy tool holders are widely used in the processing of aluminum alloy, copper, plastic and other materials. Since the cutting forces of these materials are relatively small, the performance of aluminum alloy tool holders can meet the processing requirements. For example, aluminum alloy tool holders can perform well in milling, drilling, tapping and other processing of aluminum alloy parts.
Precision engraving machine processing: Precision engraving machines have high requirements for processing accuracy and surface quality. The high precision, high stability and lightweight characteristics of aluminum alloy tool holders make it an ideal choice for precision engraving machines. Aluminum alloy tool holders are widely used in precision processing fields such as mobile phone casings, electronic components, and molds.