JP2003038910A - Coolant cleaning apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the accumulation of chips or abrasive grains on the bottom of a coolant tank and to achieve also the control of floating chips. SOLUTION: In a columnar circular coolant tank 14 constituting a coolant cleaning apparatus and for causing eddy flow 27 in a coolant containing the chips or the abrasive grains flowing out from industrial equipments including a machine tool for cutting or grinding, or the like, the coolant containing sludge of the chips, the abrasive grains, or the like, is made to flow-in toward the center of the eddy flow caused in the coolant in the circular coolant tank 14 from the upper part of the coolant stored in the circular tank 14 when the coolant flows-in to the circular coolant tank 14.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing chips or abrasives flowing out of a machine tool for cutting or grinding (hereinafter also referred to as a "working machine"). The present invention relates to a coolant cleaning apparatus that cleans a coolant by separating chips or abrasive grains from a contained coolant. 2. Description of the Related Art In the industry, in order to improve the recyclability, when processing chips flowing out of a processing mother machine or coolant containing abrasive grains, chips are formed at the bottom of a coolant tank. Alternatively, there is a demand for a coolant cleaning apparatus that does not store abrasive particles. Therefore, for the purpose of providing a coolant cleaning device that does not accumulate chips or abrasive grains at the bottom of the coolant tank, for example, Japanese Utility Model Application No. 2001-2677 by the present applicant is disclosed. FIG. 3 shows a coolant cleaning apparatus disclosed in Japanese Patent Application No. 2001-2677 filed by the present applicant. FIG. 3 is a chip processing apparatus for processing a coolant containing magnetic chips or abrasive grains in the coolant, such as a coolant flowing out of a machine tool such as a grinder;
It is an explanatory view showing the front of a coolant cleaning device constituted by a cylindrical coolant tank for generating a vortex in the coolant stored in the coolant tank, an abrasive particle collecting device, a coolant pump, and the like. [0003] When the coolant containing abrasive grains or chips of a magnetic substance, which has flowed out of the processing mother machine, flows into the magnetic separator 11, the magnetic drum of the magnetic separator 11 cuts the magnetic substance in the coolant. The debris is adsorbed and separated, and the coolant is treated. The coolant after the treatment is discharged from the magnetic separator 11 into the circular coolant tank 14 along the inner wall of the circular coolant tank 14 from the tangential direction of the circular coolant tank 14. Inflow. The magnetic chips in the coolant collected by the magnetic separator 11 are discharged into the receiving box 21. The coolant in the circular coolant tank 14 generates a left-handed vortex 27 in the northern hemisphere due to the suction force of the coolant by the coolant pump 12 from a coolant outlet 29 provided at the center of the bottom surface 33 of the circular coolant tank 14. This vortex 27 is generated from the magnetic separator 11, and is generated from the magnetic separator 11 in the tangential direction of the circular coolant tank 14.
Of the coolant flowing along the inner wall of the coolant pump 1 and the coolant pump 1 installed on the outer wall of the circular coolant tank 14.
A part of the coolant discharged from the nozzle 2 is amplified by the coolant ejected from the coolant discharge nozzle 25 into the circular coolant tank 14. [0005] The minute residual chips and abrasive grains in the coolant that could not be collected by the magnetic separator 11 gradually settle while rotating with the coolant due to the vortex 27 in the circular coolant tank 14. , Gather at the center of the bottom surface 33 of the circular coolant tank 14. Fine residual chips and abrasives in the coolant gathered at the center of the bottom surface 33 of the circular coolant tank 14 are discharged by the coolant pump 12 from the coolant outlet 29 provided at the center of the bottom surface 33 of the circular coolant tank 14. The abrasive is collected through the pipe 30 together with the coolant, and contains the filter or the like.
1 and reprocessed, and this is repeated to clean the coolant. Round coolant tank 1
An air entrainment preventing plate 28 for preventing air from being entrained by the swirl 27 is provided in the coolant outlet 29 in the 4. The flow rate of the coolant ejected from the coolant discharge nozzle 25 into the circular coolant tank 14 is adjusted. By adjusting with the valve 26, the strength of the vortex 27 can be adjusted. Circular coolant tank 14
Is provided with a coolant tank 13 having a coolant pump 13 for pressure-feeding the purified clean coolant in the circular coolant tank 14 to the processing mother machine. Is communicated by a notch 31 having an underflow structure. [0006] The first aspect of the present invention.
Unlike the method described above, the coolant in the circular coolant tank containing residual chips or abrasive grains,
A new method that improves the filtration accuracy due to eddy currents and eliminates floating debris that floats on the coolant stored in the circular coolant tank, especially at the center of the eddy current, to generate eddy currents in the coolant An object of the present invention is to provide an employed coolant cleaning device. [0007] The coolant cleaning apparatus according to the first aspect of the present invention constitutes a coolant cleaning apparatus, and is discharged from general industrial machines including a machine tool for performing cutting or grinding. In order to generate a vortex in a coolant containing sludge such as chips or abrasives, in a cylindrical circular coolant tank, a coolant containing sludge such as chips or abrasives,
When flowing into the circular coolant tank, the coolant flows from the upper portion of the coolant stored in the circular coolant tank toward the center of the vortex generated in the coolant in the circular coolant tank. . DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A coolant cleaning apparatus according to the present embodiment performs processing of chips or abrasives in a coolant containing chips or abrasives flowing out of a processing mother machine. This is a coolant cleaning device. Note that the coolant cleaning apparatus according to the present embodiment does not accumulate chips or abrasives at the bottom of the coolant tank when processing the coolant containing chips or abrasives flowing out of the processing mother machine. At the same time, there is a demand for eliminating floating debris on the coolant stored in the coolant tank. Hereinafter, typical embodiments of the present invention will be described with reference to the drawings. However, the dimensions, shapes, materials, relative positions, and the like of the components described in this embodiment are not intended to limit the scope of the present invention only to them unless otherwise specified. It is only an illustrative example. A coolant cleaning apparatus according to this embodiment in the case where magnetic material chips or abrasive grains are contained in the coolant flowing out of the processing mother machine will be described with reference to FIGS. 1 and 2. [0010] The coolant cleaning apparatus according to this embodiment in the case where the coolant that has flowed out of the processing mother machine contains chips or abrasive grains of a magnetic material, is provided with a magnetic separator 11.
A coolant pump 12 for circulating coolant, and a coolant pump 13 for pumping processed coolant to a processing mother machine. The coolant pump 13 has a cylindrical coolant tank 14 having two coolant pumps, an abrasive grain collecting device 32, and the like. Have been. [0011] The coolant containing magnetic chips or abrasives, etc., which has flowed out of the processing mother machine, first flows into the magnetic separator 11, where the processing of the magnetic chips in the coolant is performed. The magnetic separator 11 is configured such that a rotating cylinder 15 having a fixed magnet built in a non-magnetic rotating cylinder is rotated by an electric motor 16, and a flow path in which a predetermined gap is formed between the rotating cylinder 15 and a semi-cylindrical bottom plate 17. 18, a coolant containing magnetic chips or abrasive grains is allowed to pass through, and sludge of the magnetic material in the coolant is turned into a rotating cylinder 15.
By adsorbing and separating on the outer periphery of The coolant containing the residual chips or abrasives flowing out of the magnetic separator 11 is generated in the coolant in the circular coolant tank 14 from above the coolant stored in the circular coolant tank 14 as described later. The vortex 27 flows toward the center. The magnetic sludge adsorbed on the outer periphery of the rotary cylinder 15 is pressed by the squeezing roller 19 to be dehydrated, scraped off by the scraping plate 20, and discharged into the receiving box 21. A coolant pump 12 for circulating coolant is installed on the outer wall of the circular coolant tank 14. Similarly, a clean tank 22 installed on the outer wall of the circular coolant tank 14 is used for processing the cleaned coolant into a mother machine. Is provided with a coolant pump 13 for pressure feeding. The coolant pump 12 for circulating the coolant installed on the outer wall of the circular coolant tank 14 is connected by a pipe 30 to a coolant outlet 29 provided at the center of the bottom surface 33 of the circular coolant tank 14. Pump the coolant in the center of the inner bottom surface 33. The coolant in the circular coolant tank 14 is generated by the coolant pump 12 pumping the coolant in the center of the inner bottom surface 33 of the circular coolant tank 14, and is drawn from the center of the bottom surface 33 of the circular coolant tank 14 to the outside of the circular coolant tank 14. The suction force generates a left-handed vortex 27 (Coriolis force) in the northern hemisphere from the coolant outlet 29 in the center of the bottom surface 33 of the circular coolant tank 14 to the upper surface of the liquid surface of the circular coolant tank 14 (Coriolis force). The above-mentioned circular coolant tank 14 which could not be collected due to
The remaining chips or abrasives in the coolant that flowed in from the upper part of the coolant stored in the coolant toward the center of the vortex 27 in the circular coolant tank 14 include a coolant containing the remaining chips or abrasives. Flow toward the center of the swirl 27, the sediment is gradually connected to the center of the left-handed swirl 27, and can be easily and efficiently collected at the center of the bottom surface 33 of the circular coolant tank 14. This could be confirmed from several experiments by the present inventors. Due to the vortex 27 generated in the circular coolant tank 14, residual chips or abrasive particles in the coolant which cannot be collected by the magnetic separator 11 and are collected at the center of the bottom surface 33 of the circular coolant tank 14. For example, the coolant pump 12 for circulating the coolant provided on the outer wall of the circular coolant tank 14 pipes the coolant from the coolant outlet 29 provided at the center of the bottom surface 33 of the circular coolant tank 14 together with the coolant in the coolant tank 14. It is sucked through 30 and sent again into the magnetic separator 11 via the abrasive grain collecting device 32, and this circulation is repeated. The floating debris 34, which normally floats on the upper surface of the coolant at the center of the vortex 27 and is difficult to settle, is removed from the upper part of the coolant stored in the circular coolant tank 14 by a circular coolant tank. It is provided at the center of the bottom surface 33 of the circular coolant tank 14 without rising due to the coolant containing residual chips or abrasive grains flowing out from the magnetic separator 11 flowing toward the center of the vortex 27 in the 14. Coolant outlet 2
It was also confirmed by the present inventor that it was possible to discharge from No. 9. Further, depending on the size of the vortex 27 generated in the circular coolant tank 14, air is drawn into the coolant pump 12 from above the coolant in the circular coolant tank 14, whereby the coolant of the coolant pump 12 This may cause a problem such as a decrease in the discharge amount. Therefore, the circular coolant tank 1
Coolant outlet 29 provided at the center of the bottom surface 33 of the nozzle 4
A distance from the coolant outlet 29 is provided on the upper surface of the coolant pump, and the coolant outlet 29 is opposed to the coolant outlet 29 so as to cover the coolant outlet 29 with a plate to prevent entrainment of air into the coolant pump 12. The air entrainment prevention plate 28 is provided. Coolant pump 12 for coolant circulation
A part of the coolant is discharged by the coolant jetted into the circular coolant tank 14 through the coolant discharge nozzle 25 provided in the tangential direction of the circular coolant tank 14 by the T-shaped connecting pipe 24 provided in the middle of the discharge pipe 23 , The vortex 27 is amplified, and the effect of the vortex 27 increases. Note that the flow rate of the coolant ejected from the coolant discharge nozzle 25 can be adjusted by the adjustment valve 26. A coolant pump 13 is provided on a part of the outer wall of the circular coolant tank 14 for feeding the coolant on the outer peripheral surface of the circular coolant tank 14 having the highest cleanliness in the circular coolant tank 14 to the machining base machine. The cleaned tank 22 is used for the circular coolant tank 14.
And a notch 31 of an underflow structure. In the present embodiment, the chips contained in the coolant flowing out of the processing mother machine are magnetic materials, and the chips of the magnetic material are contained in the coolant flowing out of the processing mother machine like a grinding machine. In addition, the case where abrasive grains and the like are contained is described, but by replacing the magnetic separator 11 in the present embodiment with a filter device (not shown) or the like,
It is possible to cope with the case where the chips discharged together with the coolant from the processing mother machine are non-magnetic materials. In addition, as described above, the present invention is not limited to the embodiment described above and shown in the drawings, but can be appropriately modified without departing from the gist. According to the coolant cleaning apparatus according to the first aspect, as compared with the conventional coolant cleaning apparatus, not only do not collect chips or abrasive grains at the bottom of the coolant tank, but also floating debris. A novel coolant cleaning device capable of suppressing the above can be provided. In addition to the above effects, the following effects can be considered: the frequency of cleaning the coolant tank, the prevention of deterioration of the coolant, the reduction of running costs, and the like. By extending the length, the performance of the processing mother machine can be maintained and the overall operation cost can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view showing the front of a coolant cleaning device of the present invention. FIG. 2 is an explanatory view showing a plane of the coolant cleaning device of the present invention. FIG. 3 is an explanatory view showing the front of a coolant cleaning apparatus according to Japanese Patent Application No. 2001-2677 filed by the present applicant. [Description of Signs] 11: Magnetic separator 12: Coolant pump (for coolant circulation) 13: Coolant pump 14: Circular coolant tank (for clean coolant pressure feeding) 15: Rotating cylinder 16 ..Electric motor 17 ... Bottom plate 18 ... Flow path 19 ... Squeeze roller 20 ... Scraping plate 21 ... Receiving box 22 ... Clean tank 23 ... Discharge piping 24 ... T-shaped Connection pipe 25 ... Coolant discharge nozzle 26 ... Adjustment valve 27 ... Swirl 28 ... Air entrapment prevention plate 29 ... Coolant outlet 30 ... Piping 31 ... Cut hole 32 ...・ Abrasive collection device 33 ・ ・ ・ Bottom surface 34 ・ ・ ・ Floating debris

Claims (1)

Claims 1. Contain a sludge such as chips or abrasives flowing out of a general industrial machine including a machine tool for performing cutting or grinding, which constitutes a coolant cleaning apparatus. When a coolant containing sludge such as chips or abrasive grains flows into the circular coolant tank, a liquid is stored in the circular coolant tank in a cylindrical coolant tank for generating a vortex in the coolant. A coolant purifying device, wherein the coolant is caused to flow from an upper portion of the coolant thus formed toward a center of a vortex generated in the coolant in the circular coolant tank.