Каталог Widia инструментальная оснастка - страница 1042

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Spindle Connections

The Importance of a Strong Connection

Many component materials are switching to lighter, high-strength materials,Our response to this traditionally weak point has been the proven KM™system,
like titanium, to increase fuel efficiency. To save time and money, machinists areand now we are introducing the next generation KM4X™. The combination of the
challenged to maximize metal removal rates at low cutting speeds and considerablyKM4X’s high clamping force and interference level lead to a robust connection
higher cutting forces. Machine tool builders must also provide greater stiffness andand extremely high stiffness and bending load capacity for unmatched
damping in their spindles to minimize undesirable vibrations that deteriorate tool lifeperformance in titanium machining.

and part quality. Though these advances contribute to greater productivity, the weakest point is often the spindle connection itself, which needs high torque and must overcome high-bending applications.

Current Spindle Connections

To fulfill the increasing demand for high productivity, an important element toThe advent of face contact represented a major step over the standard 7/24 taper.
consider is the tool/spindle connection. This interface must be able to withstandCombining face contact with a 7/24 solid taper provides higher accuracy. However,
high loads and maintain rigidity throughout the machining process. In most cases,this also presents some disadvantages. Loss of stiffness at higher speeds or high
the connection determines how much material can be removed on a givenside loads are some of the major flaws apparent in this system. Most of these tools
operation until high tool deflection or chatter result.are solid, and the spindles have relatively low clamping force.
High-performance machining is accomplished using high feeds and depths of cut.This results in limited connection stiffness, as radial interference needs to be
Because of advances in cutting tools, there is a need for spindle connections thatminimal. The required tolerances to achieve consistent face contact are thus
utilize available power.very tight, leading to high manufacturing costs.

Several different types of spindle connections were developed and/or optimized over the last few decades. Due to its strong cost/benefit position, the 7/24 ISO taper became one of the most popular systems on the market. It has been successfully used in many applications, but its accuracy and high-speed limitations prevent it

from becoming a more advanced and productive system.

Choosing What’s Right

With more materials that are tougher to machine and require considerably higher The KM spindle connections greatly outperform the conventional 7/24 steep cutting forces from the machine tool, choosing the spindle interface wisely to taper and its face taper contact derivatives HSK and PSC systems. KM4X maximize cutting edge performance is key to success. is the best large, heavy-duty spindle connection for rigidity because it has superb balance between bending and torsion capabilities from the machine tool.

Various spindle connections commercially available today: 7/24 ISO taper, KM (ISO TS), HSK, and PSC.