The SMART Anti-Vibration Tool Holder Series Best Suited for Deep Hole Boring (Part 1) - BIG DAISHOWA
Optimal SMART Anti-Vibration Tool Holder Series for Deep Hole Boring (Part 1)
During deep hole machining, chatter vibration is likely to occur when the tool's length-to-diameter ratio (overhang) exceeds 4~5 times. When chatter occurs, the following effective anti-vibration countermeasures can be adopted.
Shorten Tool Overhang or Select a Tool with Larger Diameter
Select an Insert with a Smaller Nose Radius
Select Raw Material with High Elastic Modulus (e.g., Carbide)
Select a Tool Holder with Internal Anti-Vibration Mechanism
Methods ① and ② are common approaches to suppress vibration by increasing tool rigidity or reducing cutting resistance. However, suppressing vibration becomes very difficult when the tool's length-to-diameter ratio exceeds 4~5 times.
Method ③: While very effective as an anti-vibration measure, it involves expensive costs due to large diameters and long lengths.
Method ④: Equipped with an internal anti-vibration mechanism, it can reduce vibration transmitted from the cutting edge. It effectively suppresses machining vibration even when the length-to-diameter ratio exceeds 4~5 times. Furthermore, it can significantly reduce costs. Given these advantages, BIG DAISHOWA developed the SMART Anti-Vibration Tool Holder with a built-in anti-vibration mechanism. The current series is comprehensive and can address various machining needs.
Anti-Vibration Effect of SMART Anti-Vibration Tool Holder
The SMART Anti-Vibration Tool Holder has a built-in anti-vibration mechanism consisting of a "High-Density Damper" and a "Movable Elastic Body". Even if slight vibration is transmitted from the cutting edge, the inertia principle of the built-in damper acts immediately, creating a phase difference in mutual motion to suppress the vibration. The resulting effect is the elimination of energy generated by vibration, instantly creating damping vibration.
Figure 1 shows a comparison of attenuation waveforms with and without the anti-vibration mechanism. The holder with the anti-vibration mechanism suppresses vibration the instant it occurs.
Figure 2 presents an FFT analysis based on the waveform in Figure 1, seeking its compliance. A lower value indicates less susceptibility to vibration.
Machining Performance Comparison
Without Anti-Vibration Mechanism: During actual machining, the cutting speed had to be reduced to 10~30 m/min to avoid chatter. The finished surface appeared white and cloudy.
With SMART Anti-Vibration Tool Holder: Even when the cutting speed was increased tenfold to 100~300 m/min, machining vibration was suppressed, and surface finish was improved.
Therefore, after finish machining using the SMART Anti-Vibration Tool Holder, the surface becomes glossy. Additionally, labor costs, machining costs, etc., are significantly reduced.
- Enables high-speed machining (10x speed increase possible)
- Produces glossy, high-quality surface finish
- Significantly reduces overall machining costs
- Effective even with high length-to-diameter ratios (>4-5xD)