Types of knife handles and knife clamps

　　Tool holder and tool clampWhat types are there? How to choose a tool holder and tool clamp? Tool holders and clamps are divided into Japanese standard BT holders, German standard SK holders, HSK holders; international social standards IV or IT holders; and American national standard CAT tool holders. According to the taper of the spindle taper hole, it is divided into 7 to 24 taper universal handles and 1 to 10 taper HSK vacuum handles. Currently, based on the clamping type, it is divided into hydraulic or tool holders, stress-locked tool holders, and heat-shrink tool holders. The tool holder and clamp are an important bridge between the machine tool spindle and the tool. The value of the tool holder and clamp is insignificant compared to the value system of the complete set, but it is an important information bridge connecting the machine tool spindle and the tool, which has a very important impact on the quality management of processed products.

The application of modern large high-speed processing equipment in production is becoming increasingly widespread. How to choose a handle to improve the spindle speed and enhance the high precision of forming surface processing is particularly important. Technicians need to consider various characteristics of the handle, especially the clamping force, radial runout error precision, and dynamic balance quality under high-speed conditions, which helps reduce the vibration of the tool itself. Hydraulic tool holders are a widely used technical application for tool holders. The clamping method of this tool holder is different from traditional tool holder systems. Tightening only requires one pressure bolt, and when the bolt is tightened, it pushes the piston sealing block into a hydraulic oil pressure in the handle, and the pressure is evenly transmitted to the steel expansion sleeve from the circumference, causing the expansion wall to clamp the tool.

This clamping system can control the radial runout error and repeat positioning accuracy within 3μm. Due to the high-pressure oil pressure in the memory of the tool holder, when the tool is clamped, the oil chamber structure and the presence of high-pressure oil greatly enhance the damping of the enterprise structure design, which can effectively prevent the vibration of the tool and the machine tool spindle. According to actual application conditions, using this clamping system can not only improve processing accuracy and quality but also extend the tool's lifespan during the cutting process.

In addition to being maintenance-free and dirt-resistant, the handle is easy to use and safely clamps the tool. The stress-lock type tool holder and clamp use a multi-faceted tool tightening method, and the structure is very simple, but the design system function is also quite high for the clamping device. The tool clamping hole uses a precision axisymmetric special polygonal calculation design, and this tool is successfully loaded into the hole through a special loading device, forcing the clamping hole to round within the elastic deformation range.

The stress-lock clamping system is widely used in extended rods, allowing for more flexible completion of complex processing tasks, especially for applications that require frequent tool changes. There are two main applications: suitable for light processing applications and suitable for medium and heavy processing applications. This type of tool holder uses an expansion technology similar to hydraulic tool holders to clamp the tool, but the difference is that the expansion tension is obtained mechanically rather than through hydraulic media. The advantage of this method is that it allows the user's tool holder system to achieve anti-vibration effects and high radial runout error precision, generally less than 5μm.

The heating handle tool uses the principle of thermal expansion and contraction, with heat coming from induction heating technology. The thermal expansion handle heating device has an induction coil that can precisely heat the area of the tool inserted into the handle. After the tool is inserted, the handle needs to cool for a period of time, which can be accelerated by a cooling sleeve. When the handle cools, it tightly grips the handle through the contraction force. By clamping the tool with thermal expansion and contraction, the clamping force is large and can withstand high torque.