Cutting Fluid Tank

Abstract

A cutting fluid tank includes: a fluid ejection apparatus configured to eject fluid toward cutting fluid containing chips and to be capable of varying at least one of a direction and a position of ejection with time in an interior of a tank body configured to store the cutting fluid containing the chips flowed from a work portion of a machine tool. The fluid ejection apparatus includes an ejection head having an ejection port rotatable about an axis of rotation. The ejection port is at a twisted position with respect to the axis of rotation, and the ejection head is rotated by a reaction force of the fluid ejected from the ejection port. Part of the cutting fluid stored in the cutting fluid tank is used as the fluid to be ejected from the ejection port.

Description

technical field [0001] The present invention relates to a cutting fluid tank used in machine tools such as machining centers and lathes. Background technique [0002] In a machine tool that performs cutting, such as a machining center or a lathe, a cutting fluid is generally used for the purpose of lubricating and cooling a tool, and discharging chips. [0003] The cutting fluid sprayed toward the machining chamber of the machine tool by the cutting fluid supply pump is discharged out of the machining chamber together with chips removed from the workpiece. The discharged cutting fluid flows into and temporarily stores in the main body of the cutting fluid tank after the chips mixed in the cutting fluid are separated and removed by a chip conveyor or a filter, and is then supplied again to the machining chamber by the cutting fluid supply pump. [0004] However, the chips mixed with the cutting fluid cannot be separated and removed 100% by the chip conveyor or the filter, an...

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Problems solved by technology

However, the amount of cutting fluid flowing in the tank body fluctuates depending on the amount of cutting fluid required for machining the workpiece, so the flow rate is not constant, and the flow rate may slow down or stop.

[0010] Furthermore, in addition to securing the maximum capacity for the installation space, there are many cases where equipment such as chip conveyors are arranged, and thus the structure and shape of the tank main body of the cutting fluid tank are subject to various restrictions.

As a result, there is a problem that the inside of the box body is formed with intricate narrow spots, and the cutting fluid containing chips stays in these spots, causing the chips to accumulate at the bottom.

[0020] However, the cutting fluid tank described in Patent Document 1 is limited to the case where the internal structure of the tank main body is simple, and cannot be applied to the case where, for example, a chip conveyor and the like are provided and intricate parts are formed.

[0021] In addition, in the case of the mechanism that forms the eddy flow of the cutting fluid in the tank main body as in the cutting fluid tanks described in Patent Documents 2 and 3, when a chip conveyor or the like is installed in the tank main body, the flow is hindered by it, and the cutting fluid is cut. Fluid flow becomes constant, so chip accumulation may occur

[0022] Furthermore, when a propeller is used as in the cutting fluid tanks described in Patent Documents 4 and 5, the effect is limited to a fixed range within the tank main body, and there is a problem that it is impossible to effectively prevent chips from accumulating in a wide range in the tank main body.

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