SPINDLE DEVICE

• Main Authors: INAGAKI YOSHIFUMI, NAKAMURA SHINYA, KATSUNO YOSHIAKI
• Format: Patent
• Language: English; Japanese
• Published: 04.01.2022
• Subjects: BEARINGS; BLASTING; BORING; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOTDIRECTED TO A PARTICULAR RESULT; DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g.ARRANGEMENTS FOR COPYING OR CONTROLLING; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; LUBRICATING; MACHINE TOOLS; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OFPARTICULAR DETAILS OR COMPONENTS; MECHANICAL ENGINEERING; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; THERMAL INSULATION IN GENERAL; TRANSPORTING; TURNING; WEAPONS

To provide a long-life spindle device and machine tool that can stably supply lubricant from a lubricant supply device to rolling bearings even during operation while maintaining handleability during both of bearing assembly and initial break-in operation.SOLUTION: A lubricant supplied from a lubricant supply device (3) is a wax-based lubricant (W) that contains lubricating oil and wax, and that is reversibly changeable, across a liquefaction point being a predetermined temperature within a temperature range of 25 to 60°C inclusive, into between a liquid state with a lubricant temperature exceeding the liquefaction point and a semi-solidified state with the lubricant temperature below the liquefaction point. A grease (G) comprising a base oil component having affinity with the wax-based lubricant (W) and permeable property is enclosed in a bearing space of a rolling bearing.SELECTED DRAWING: Figure 2 【課題】軸受組込時や初期慣らし運転時のいずれにおいても取扱性を維持しつつ、運転時においても潤滑剤供給装置から転がり軸受への潤滑剤の安定供給を図ることができる長寿命のスピンドル装置及び工作機械を提供する。【解決手段】潤滑剤供給装置（３）から供給される潤滑剤は、潤滑油と、ワックスとを含み、２５〜６０℃の温度範囲内の所定の温度である液状化点を境として、液状化点を越えたときの液状状態と、液状化点以下での半固化状態との間を、可逆変化可能なワックス系潤滑剤（Ｗ）であり、転がり軸受の軸受空間には、ワックス系潤滑剤（Ｗ）と親和性及び浸潤性を有する基油成分を含んで構成されるグリース（Ｇ）が封入されている。【選択図】図２