TOOL SHANK SUITABLE FOR CRYOGENIC MINIMUM QUANTITY LUBRICATION

摘要

A tool shank suitable for cryogenic minimum quantity lubrication, belonging to the field of numerically controlled machine tool cooling and lubrication techniques. The tool shank comprises a tool shank main body (1), a peripheral stationary structure, a multi-layer sealing structure, a heat insulation structure, and a bearing support structure; an outer surface of an adapter sleeve (2.3) of the peripheral stationary structure is provided with an inlet for an ultra-low temperature medium (L1) and an inlet for a cutting fluid (L2); a flow passage separation sleeve (4.2) of the heat insulation structure is used for separating an internal flow passage I (1-a) and an internal flow passage II (1-b), so as to ensure that the internal flow passage I (1-a) and the internal flow passage II (1-b) do not interfere with each other before entering a mixing area (6.6), reducing the influence of the ultra-low temperature medium (L1) on the cutting fluid (L2). The tool shank solves the problems of poor cooling performance in the minimum quantity lubrication technique and insufficient lubrication in the low-temperature cooling machining technique, combines the oxygen insulation protection effect of the ultra-low temperature medium, the cooling effect of the ultra-low temperature medium, and the friction reduction and lubrication effect of minimum quantity lubrication, and therefore has a good machining effect in terms of materials which are difficult to machine.