JP3505710B2 - Coolant cleaning device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cutting chips from a coolant containing chips or abrasives flowing out of a machine tool for cutting and grinding. Alternatively, the present invention relates to a coolant cleaning apparatus for cleaning a coolant by separating abrasive grains. 2. Description of the Related Art In the industry, in order to improve the recyclability, when processing a coolant containing chips or abrasive grains flowing out of a machine tool or the like, the coolant is cut to the bottom of a coolant tank. There is a demand for a coolant cleaning apparatus that does not accumulate debris or abrasive grains. FIG. 3 shows a case where a magnetic material chip or the like is contained in the coolant flowing out of a machine tool or the like, and a chip processing device and a circular coolant tank that generates a vortex in the coolant in the circular coolant tank. It is explanatory drawing which shows the front of the coolant cleaning apparatus which performs the processing of the conventional coolant containing the shavings etc. of a magnetic body, FIG. 4 shows the magnetic substance in the coolant which flows out from a machine tool etc. Of a conventional coolant containing magnetic chips, etc., which is composed of a chip processing device that contains chips, etc., of a circular shape, a circular coolant tank that generates a vortex in the coolant in a circular coolant tank, etc. It is explanatory drawing which shows the plane of the coolant cleaning apparatus which performs a process. When the coolant containing magnetic chips and the like flowing out of a machine tool or the like flows into the magnetic separator 11, the magnetic chips in the coolant are adsorbed by the magnetic drum of the magnetic separator 11. The separated coolant is processed, and the processed coolant flows out of the magnetic separator 11 and flows into the circular coolant tank 14 from the tangential direction of the circular coolant tank 14 along the inner wall of the circular coolant tank 14. 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 flows out of the magnetic separator 11 and flows from the tangential direction of the circular coolant tank 14 along the inner wall of the circular coolant tank 14, and the coolant installed in the center of the circular coolant tank 14. A part of the coolant discharged from the pump 12 is
Circular coolant tank 1 from coolant discharge nozzle 25
A vortex 27 is generated by the coolant jetted into the inside 4. Fine residual chips and the like in the coolant that could not be collected by the magnetic separator 11 continue to settle while rotating with the coolant due to the vortex 27,
It is accumulated on the bottom of the central part of the circular coolant tank 14. By the coolant pump 12 installed on the upper surface of the central portion of the circular coolant tank 14, fine chips in the coolant accumulated on the lower surface of the central portion of the circular coolant tank 14 are sucked together with the coolant and sent again to the magnetic separator 11 by pressure. It is reprocessed, and this is repeated to clean the coolant. The strength of the vortex 27 can be adjusted by adjusting the flow rate of the coolant ejected from the coolant discharge nozzle 25 into the circular coolant tank 14. A part of the outer wall of the circular coolant tank 14 is provided with a clean tank 22 having a coolant pump 13 for pumping the purified coolant in the circular coolant tank 14 to a machine tool or the like. The clean tank 22 is communicated with a notch 31 having an underflow structure. [0004] When the coolant discharged from a machine tool such as a grinding machine contains abrasives in addition to magnetic chips, a vortex 27 in the circular coolant tank 14 is provided. Centrally collected by coolant,
The coolant pump 12 removes the abrasive chips or residual chips of the magnetic material, etc.
After being sent to the particle collecting device and treating the abrasive grains, the coolant is again sent into the magnetic separator 11 to reprocess the remaining chips of the magnetic material, and the circulation is repeated to clean the coolant. [0005] The present invention relates to claim 1 of the present invention
It is an object of the present invention to provide a coolant cleaning apparatus employing a novel method for eliminating chips and the like that accumulate at the bottom of a coolant tank, unlike the above-described method. [0006] According to a first aspect of the present invention, there is provided a coolant cleaning apparatus for removing coolant containing chips and the like remaining in a circular coolant tank with a hole diameter of an outlet at a central portion of a bottom plate of the circular coolant tank. Was provided in the pump chamber
The pumping flow rate of the coolant pump for coolant circulation is 6
Φ100-150m in case of 0-120L / min
m, the pumping flow rate is also 120 to 240 L / min.
In the case of １５０, the coolant was discharged from the outlet having a diameter of 150 to 200 mm, and the coolant containing the remaining chips and the like in the circular coolant tank discharged from the outlet was connected by a gutter installed at the lower part of the circular coolant tank. And a pump chamber in which a coolant pump for feeding the chips to the chip removing means again is provided. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A coolant cleaning apparatus according to the present embodiment is a coolant cleaning apparatus for processing a coolant containing chips and the like flowing out of a machine tool or the like. The coolant cleaning device according to the present embodiment is a coolant cleaning device that does not collect chips or the like at the bottom of a coolant tank when processing a coolant containing chips or the like flowing out of a machine tool or the like. Is required. 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 the present embodiment in a case where chips contained in a coolant flowing out of a machine tool or the like are magnetic materials will be described with reference to FIGS. 1 and 2. [0008] In the case where the chips contained in the coolant flowing out of the machine tool or the like are magnetic substances, the coolant purifying apparatus according to the present embodiment comprises a magnetic separator 11, a coolant pump 12 for circulating coolant, and a processing unit. And a circular coolant tank 14 having two coolant pumps, a coolant pump 13 for feeding the coolant to the machine tool. The coolant containing magnetic chips and the like flowing out of the machine tool is first flowed into the magnetic separator 11, where the magnetic chips in the coolant are treated. 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 semicylindrical bottom plate 17. The processing is performed by passing a coolant containing chips of a magnetic substance through 18 and adsorbing and separating sludge of the magnetic substance in the coolant on the outer periphery of the rotary cylinder 15. The processed coolant that has flowed out of the magnetic separator 11 flows into the circular coolant tank 14 from the tangential direction along the inner wall of the circular coolant tank 14. 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 provided in a pump chamber 28 provided on the outer wall of the circular coolant tank 14, and a clean tank 22 is provided in a clean tank 22 provided on the outer wall of the circular coolant tank 14. A coolant pump 13 for pumping the coolant to the machine tool is provided. A pump chamber 28 provided with a coolant pump 12 for circulating a coolant is connected by a gutter 30 to a coolant outlet 29 provided at the lower surface of the pump chamber 28 and at the center of the circular coolant tank 14, and is connected to the pump chamber 28. The provided coolant pump 12 for circulating coolant pumps the coolant in the pump chamber 28. The coolant pump 12 for circulating the coolant is
By pumping the coolant in the coolant 8, the coolant in the circular coolant tank 14 flows from the coolant outlet 29 into the pump chamber 28 via the gutter 30, and from the coolant outlet 29 in the gutter 30 to the pump chamber 28. The coolant in the circular coolant tank 14 becomes a suction force to be sucked out of the circular coolant tank 14 by the coolant flow, and the circular coolant tank 1 flows from the coolant outlet 29 at the center of the bottom plate of the circular coolant tank 14.
4, a left-handed vortex 27 occurs in the northern hemisphere, and the remaining chips in the coolant that could not be collected by the magnetic separator 11 are removed by the left-handed vortex 27 in the circular coolant tank 14. While rotating with the coolant, the sedimentation is continued gradually, and is accumulated on the bottom surface of the central portion of the circular coolant tank 14. Note that the above-mentioned vortex 2
It is considered that there is a great correlation between the size of the coolant outlet 29 and the pumping flow rate of the coolant pump 12 in order to generate the vortex 27. As a result of repeated experiments and studies on the relationship between the size and the pumping flow rate of the coolant pump 12, the results shown in Table 1 were obtained. The vortex 27 generated in the circular coolant tank 14 accumulates on the bottom of the central part of the circular coolant tank 14,
Residual chips in the coolant that could not be collected by the magnetic separator 11 are discharged from the coolant outlet 29 provided on the central bottom surface of the circular coolant tank 14 to the gutter 3.
Pump chamber 28 connected to the pump chamber 28
Coolant pump 1 for circulating coolant provided in 8
By 2, it is sucked together with the coolant in the circular coolant tank 14, sent to the magnetic separator 11 again, and repeats this circulation. A T-shaped connecting pipe 24 is provided in the middle of the discharge pipe 23 of the coolant pump 12, and a part of the coolant is supplied through a coolant discharge nozzle 25 provided in a tangential direction of the circular coolant tank 14.
4 and the coolant that has flowed out of the magnetic separator 11 and flowed tangentially along the inner wall of the circular coolant tank 14 due to the vortex 2
7 is amplified, and the effect of the vortex 27 increases. Further, the flow rate of the coolant ejected from the coolant discharge nozzle 25 can be adjusted by the adjusting valve 26. A part of the outer wall of the circular coolant tank 14 is provided with a clean tank provided with a coolant pump 13 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 machine tool. 22 is provided, and the circular coolant tank 14 and the clean tank 22 communicate with each other through a notch 31 having an underflow structure. The device of the present invention is not limited to the embodiment described above and shown in the drawings as described above, but can be appropriately modified without departing from the scope of the invention. According to the first aspect of the present invention, in the coolant cleaning apparatus in which the chips contained in the coolant flowing out of the machine tool are magnetic substances, the vortex generated naturally in the coolant in the circular coolant tank. By efficiently collecting the chips contained in the coolant on the bottom of the central part of the circular coolant tank, and sucking the remaining chips of the accumulated magnetic material together with the coolant from the bottom of the circular coolant tank by using a coolant pump As compared with the conventional coolant cleaning device, a novel coolant cleaning device that does not accumulate chips at the bottom of the coolant tank can be provided. In addition to the above effects, the frequency of cleaning the coolant tank is reduced,
It is possible to maintain the cleanliness and extend the life of coolant such as industrial machinery that is used repeatedly, and it is possible to maintain the performance of machine tools etc. This can contribute to a reduction in operating costs.

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 conventional coolant cleaning device. FIG. 4 is an explanatory view showing a plane of a conventional coolant cleaning device. [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 ・ ・ ・ Scraper plate 21 ・ ・ ・ Receiving box 22 ・ ・ ・ Clean tank 23 ・ ・ ・ Discharge pipe 24 ・ ・ ・ T-shaped Connection pipe 25 ... Coolant discharge nozzle 26 ... Adjustment valve 27 ... Swirl 28 ... Pump chamber 29 ... Coolant outlet 30 ... Gutter 31 ... Scratch hole

──────────────────────────────────────────────────続 き Continued on front page (56) References Registered utility model 3060849 (JP, U) Registered utility model 3071283 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B23Q 11/00 B23Q 11/10

Claims (1)

(57) [Claims 1] A magnetic separator for removing magnetic chips from a machine tool or the like contained in a coolant, and the coolant stored in a tank A circular coolant tank for generating a vortex, a coolant pump for circulating a coolant for sending a coolant containing chips remaining in the circular coolant tank to the magnetic separator again, and A clean tank provided on the outer wall and connected so that the circular coolant tank and the coolant flow therethrough; a coolant pump for sucking the purified coolant in the clean tank from the clean tank and sending it to a machine tool or the like A coolant purifier provided on the clean tank, wherein a center of a bottom plate of the circular coolant tank is provided. The hole diameter of the outlet for letting out the coolant containing the remaining chips and the like in the circular coolant tank from the part is adjusted by the pumping flow rate of the coolant circulation pump provided in the pump chamber, which is 60 to 120 L. / Min in case of φ100
~ 150mm, also said pumping flow rate is 120 ~ 240
In the case of L / min, an outlet having a diameter of 150 to 200 mm, a pump chamber having a coolant pump for circulating coolant, and a gutter for connecting the outlet and the pump so that coolant can flow therethrough are provided. A coolant cleaning device characterized by the following.