フローティングホルダー
旋盤でのリーマ加工用
精密穴加工では、下穴の位置と工具軸中心の位置を合わせることがリーマの適切な加工に必要となります。旋盤でリーマを使用する場合、ツールホルダーと加工する穴との間の軸方向誤差を補正することがしばしば必要となります。この誤差は、マシンでのツール位置ずれの修正あるいはフローティングホルダーの使用によって修正することができます。マシンの熱膨張やタレットの回転する際の位置のばらつきにより常に位置ずれが変化する場合はフローティングホルダーは特に有効です。マパールのフローティングホルダーは、高速・高送り切削加工で最適な結果が得られます。
Floating holders
Floating holders from MAPAL compensate for the axial and angular offset between the tool axis and the bore to be machined. In this way radial run-out and alignment errors are compensated, optimal surface finishes reliably achieved at high cutting speeds and increased tool life.
Self-adjusting floating holders
Self-adjusting floating holders optimise the effectiveness on lathes and multiple spindle machines. All the advantages of the floating holder technology can be exploited.The self-adjusting floating holders make it possible to manually adjust tool adapters that are not central in relation to the rotating spindle and slide guides that do not run parallel to the spindle axis.
The radial play on the floating holder is further minimised. Radial run-out and alignment errors are compensated without vibration, long cutting times and tool lives are ensured. The integrated coolant supply guarantees an optimal supply of cooling lubricant to the reamer cutting edges. The spindle error can be adjusted directly via an easily accessible eccentric screw.
Floating holders for multi-bladed reamers
Floating holders have a significant weakness when used in conjunction with multi-bladed, high-performance reamers. Due to the function and the construction of the floating holder, when the tool initiates the cut at the beginning of the bore, a very low cutting speed must be selected initially. After the machining of the first few millimetres it is then possible to increase the cutting speed, depending on the material and conditions on the machine.
The mechanism inside the floating holders for multi-bladed reamers is designed especially for machining using multi-bladed reamers so that the compensation direction, the floating path and the necessary force for deflection are optimal for a specific range of diameters and tools used in the holder. This exact matching is particularly important on starting the cut. As a result high cutting speeds are possible even at the start of the reaming operation.