1. Functions and Structural Design
CNC tool holder is a key component connecting the spindle and cutting tool in CNC machine tools, and undertakes the three core functions of power transmission, tool positioning and vibration suppression. Its structure usually includes the following modules:
Taper interface: adopts HSK, BT or CAT standards, and achieves high-precision coaxiality (radial runout ≤3μm) through taper matching;
Clamping system: according to processing requirements, heat shrink type (maximum speed 45,000rpm), hydraulic type (shock reduction rate 40%-60%) or spring chuck (tool change time <3 seconds) can be selected;
Cooling channel: integrated internal cooling design, supports high-pressure coolant to reach the cutting edge directly, and improves tool life by more than 30%.
2. Typical Application Scenarios
Aerospace Manufacturing
In the processing of titanium alloy structural parts, heat shrink tool holders are used to ensure the dynamic balance accuracy during high-speed milling (12,000-18,000rpm).
Automotive mold processing
In the finishing of hardened steel (HRC55-62), hydraulic tool holders use oil pressure to evenly clamp the force, suppress vibration, and achieve Ra0.4μm mirror effect.
Medical device production
Micro spring chuck tool holders are suitable for 0.1-3mm micro tools to meet the micron-level processing requirements of bone screws, joint prostheses, etc.
3. Selection and Maintenance Recommendations
Parameters Heat shrink chuck Hydraulic chuck Spring chuck
Applicable speed 15,000-45,000 8,000-25,000 5,000-15,000
Clamping accuracy ≤3μm ≤5μm ≤8μm
Maintenance cycle 500 hours 300 hours 200 hours
Operation specification:
Use isopropyl alcohol to clean the conical surface before each tool installation
Regularly check the wear of the rivet thread (recommended torque value: HSK63/120Nm)
Avoid overheating of the chuck due to over-specification cutting parameters (temperature rise should be <50℃)
4. Technological Development Trends
The 2023 industry report shows that the market growth rate of smart chucks (integrated vibration/temperature sensors) will reach 22%, and the cutting status can be monitored in real time through the Internet of Things. The research and development of ceramic-based composite tool handles has reduced the weight by 40%, and it is expected to be put into large-scale application in 2025 processing process.
Post time: Mar-26-2025
