加工中心刀柄結構說明
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- 加工中心刀柄結構說明
Tool Holders/刀夾系統(tǒng)
In the system of spindle + tool holder + cutting tool, the tool holder is the link that has the most effect on overall concentricity and balance. Don’t think of it as commodity hardware. As spindle speed increases, the choice of tool holder has more impact on process effectiveness
在主軸+刀柄+刀具這樣的一個系統(tǒng)中，刀柄是影響同心度和動平衡一個關鍵環(huán)節(jié)，千萬不能將它當成一般的部件來看待。隨著主軸轉速的增加，刀柄的選擇對于加工的影響將顯得越來越重要。
Two Face Contact & HSK holders/兩面接觸HSK刀柄
Centrifugal force from fast spindle speeds can cause the tool holder to retract when the spindle and holder touch only along the taper.
Two-face contact at the spindle interface can solve this problem. HSK is a widely used tool holder design that features two-face contact
對于僅僅是錐度連接的刀夾系統(tǒng)來說，當主軸在高速旋轉的情況下，因為主軸本身錐孔的膨脹，而主軸和刀柄的連接又僅僅是通過錐度面連接，此時刀柄受到拉力的影響會有一個回縮。
兩面接觸的連接方式有助于解決該問題。HSK即是被廣泛使用的一種兩面接觸的刀夾系統(tǒng)。
Two Face Contact Holders/兩面接觸刀柄
Common tool holders leave a gap between the flange and spindle nose. Some tool holder systems close this gap to achieve two-face contact with a conventional taper
Two such systems are shown. Both designs combine special tool holders with a special or modified spindle interface. Both designs leave intact the freedom to use regular tool holders when two-face contact isn’t needed
The design at upper right mates tool holders that have extra material on the flange with a spindle interface that has extra material at the spindle nose
The design at lower right uses a tool holder with a spring-like taper that stays in contact even if the spindle interface opens up. Shims attached to the spindle nose close the gap to the flange
普通的刀柄連接在主軸法蘭面留有一個間隙。有一些的刀柄采取封閉這段間隙的方法來達到兩面接觸的目的；
該種設計如圖所示。這兩種連接都需要有特殊的主軸端面設計，在需不需要兩面接觸會有一定的選擇自由；
如右上圖所示。在刀柄與主軸緊密配合時會因為變形在主軸法蘭連接面之間產生材料的擠壓；
如右下圖所示。使用帶彈性錐面接觸的刀柄。其中的墊片可以封閉主軸法蘭的間隙。
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