Time:2023-09-15 Preview:
Tool balance is not just about measuring the amount of imbalance and adding or removing weight. The selection of cutting tools is crucial. Short and lightweight tools are easier to balance to good accuracy, while large and heavy tools are much more difficult and tend to produce significant vibrations. You can also save time and reduce costs by selecting tool handles that have been pre balanced or pre processed to the minimum imbalance.
Furthermore, you can reduce the amount that needs to be balanced through routine maintenance and careful handling. Any surface damage to the handle will affect balance and concentricity. Why? The impact of tool handle defects is amplified when the rotational speed climbs up. If your instrument detects a negligible force at 1000 revolutions per minute, the force increases by 100 times at 10000 revolutions per minute and by 400 times at 20000 revolutions per minute.
Excellent concentricity is even more important under high-speed spindles, as if the tool does not rotate on the centerline of the spindle, it becomes the primary factor for additional imbalance. However, the impact of imbalanced tool handles is also evident at lower speeds. Small imbalances can cause high forces to damage the spindle bearings of your machining center, and continuous large radial forces can lead to early bearing failure and expensive machine tool maintenance costs.
Also, remember that any adjustment (installation or removal of tool components, tightening of nuts, or any minor twisting or welding) requires a certain degree of balance. Even if the balance of the interference tool is only a few grams × A few millimeters, this imbalance is converted into an increase in vibration, causing accelerated tool wear, deterioration of surface smoothness, and a decrease in the accuracy of the part's shape and position (such as loss of roundness or straightness during boring).
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