Spindle unit of machine tool

Abstract

A spindle device and a tool holder of a machine tool stably ejecting spray coolant from the tip of a tool (19) in a tool holder (18) and suppressing a waste of the spray coolant, wherein the tool holder (18) is fixed to the tip part of a spindle (2) mechanically detachably through clamp means (KR), an extension passage (104) is formed in the state that an in-holder spray coolant passage (103) formed in the center part of the tool holder (18) is extended rearward, and the in-spindle spray coolant passage (102) formed in the center part of the spindle (2) is formed to communicate with the in-holder spray coolant passage (103) through the extension passage (104).

Description

technical field [0001] The invention relates to a machine tool spindle device capable of spraying mist cutting fluid from the top of a cutting tool. Background technique [0002] When cutting with a machine tool, in order to cool and lubricate the workpiece or cutting tool, or remove chips, a large amount of cutting fluid must be supplied to the processing department, but this has caused many problems: the cutting fluid will pollute the environment and bring harm to human health. Adverse effects, waste oil treatment of cutting fluid requires a lot of cost, excessive cooling of the workpiece will shorten the life of the cutting tool, and excessive cutting fluid will cause sliding wear when the cutting tool is used for fine cutting. The cutting fluid adheres to the chips, so when the chips are processed or reused, the cutting oil attached to the chips must be separated. [0003] In order to solve these problems, in recent years, a machine tool that makes a very small amount o...

AI Technical Summary

Problems solved by technology

[0002] When cutting with a machine tool, in order to cool and lubricate the workpiece or cutting tool, or remove chips, a large amount of cutting fluid must be supplied to the processing department, but this has caused many problems: the cutting fluid will pollute the environment and bring harm to human health. Adverse effects, waste oil treatment of cutting fluid requires a lot of cost, excessive cooling of the workpiece will shorten the life of the cutting tool, and excessive cutting fluid will cause sliding wear when the cutting tool is used for fine cutting. The cutting fluid adheres to the chips, so when the chips are processed or reused, the cutting oil attached to the chips must be separated

[0009] However, with the above-mentioned existing machine tool, the mist cutting fluid flowing into the pocket b of the tool holder 18 will flow out into the atmosphere through the gap between the components, resulting in a waste of cutting fluid

[0010] In addition, since the diameter of the cavity b of the tool holder 18 is larger than the diameter of the front and rear passages, the mist cutting fluid flowing into the cavity b will liquefy, and the liquefaction of the cutting fluid will prevent the cutting fluid from being stably supplied to the The processing part of the workpiece causes the tip of the cutting tool to start and stop the reaction of spraying mist cutting fluid insensitively

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