JP2000167317A - Filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make usable a filter of a material including metal which is vulnerable to a repeated distortion load by jetting a gas or the like from an ejecting means arranged at position higher than the level of a raw cutting oil, from the outside of a filter drum toward the filter of a prescribed gage. SOLUTION: A shaft body 11 is installed between right and left side plates 2a, 2b constituting a storage tank, and a filter drum 10 is supported rotatably by a pair of right and left bearings 35. An opening part 15 is formed on the right side surface of the drum 10, and a filtered, purified cutting oil is introduced into a clean tank through the opening part 13 of the right side plate 2b. Moreover, scraping-up members are fixed to a chain 8. Gas including compressed air and the purified butting oil are ejected from the nozzle 31 of an ejection pipe 30 to clean the peripheral surface of the drum 10. The peripheral surface of the drum 10 is formed by a punching 16, a net body 17 is placed on the punching metal 16, and a stainless steel filter 18 is laid on the net body 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filtering device, and more particularly to a method for separating a cutting oil containing a chip used in a metal cutting process into a chip and a cutting oil to obtain a purified cutting oil. The present invention relates to a filter device that enables repeated use.

[0002]

2. Description of the Related Art Conventionally, after use of metal cutting by various machine tools, the cutting oil to be filtered containing chips is separated into chips and cutting oil to be reusable. Many filtration devices for obtaining cutting oil (hereinafter referred to as purified cutting oil) have been proposed.

In such a filtration device, a filter having a predetermined mesh corresponding to the filtration accuracy is replaceably provided on the outer peripheral surface of the rotationally driven filtration drum, and the purified cutting oil which is filtered inside the filtration drum is temporarily removed. The present applicant has put into practical use many filtration devices configured to introduce the cleaning oil to the outside through the opening on the side surface of the filtration drum.

[0004] These filtration devices are of a so-called natural flow type based on an operation principle of obtaining and recovering a filtrate passed through a filtration filter without positively applying pressure to a filtrate to be treated. is there.

The operation principle of the conventional filtration device shown in FIG. 4 will be described. In this drawing, the cutting oil to be filtered mixed with a solid matter including cutting chips is supplied so as to have a liquid level 104. A plurality of lifting members 109 are fixed to the chain 108 driven in the direction of the arrow.
08 is driven to rotate around the injection pipe 130 also serving as a rotation axis so as to mesh with a chain sprocket fixed to the filtration drum 110, and is driven to rotate in the direction of the arrow. The filter drum 110 is provided with an opening communicating with the side opening 113 of the apparatus main body, and the purified cutting oil filtered by the filter 118 provided on the outer peripheral surface of the filter drum 110 flows out in the direction of the arrow. By that
While filtering, solid substances G such as cutting chips settled on the bottom surface are carried out obliquely upward by the lifting member 109.
Further, the filtering filter 118 is washed from the inside to the outside of the filtering drum 110 by the cleaning oil that is vigorously injected from the injection pipe 130, and the clogging is removed by the filtering. That is, clogging of the filtration filter 118 is performed in a space above the liquid level 104.

[0006] With the above-mentioned structure, the filter naturally moves out of the opening along with the filtration in the liquid, so that the filtration filter 118 moves from the regular position P1 to the center position P3. Will do. In addition, when removing the clogging of the filtration filter 118, the filter moves from the position P1, which is the regular position, to the position P2 facing outward due to the force of the jetting liquid. As described above, the filtration drum 1
The filtration filter 118 fixed to the outer peripheral surface of the
Shrinkage and expansion are repeated for each rotation. For this reason, nets having meshes of various counts that are tough against repeated deformation loads and formed from monomers of chemical fibers of nylon or polyester are used as filtration filters.

[0007]

On the other hand, many recent machine tools, such as a machining center, perform all types of machining with a single machining apparatus. For this reason, the form of the chips discharged after the cutting process also fluctuates greatly, and the cutting oil to be filtered mixed with the chips grown in the form of curls or bird's nests is often filtered. If the cutting oil to be filtered including the chips grown in such a manner is filtered through a net made of nylon or polyester-based chemical fibers as described above, the cutting oil may be broken in a short period of time due to rubbing, abrasion, cutting by sharp chips, etc. Will occur.

Therefore, in order to cope with this, the filter 118 is replaced with a metallic mesh such as a stainless steel mesh having excellent tensile strength and abrasion resistance, or an aramid resin fiber or carbon fiber based filter having higher strength. It is possible to do. However, the only disadvantage of such a metal mesh or a carbon-based filtration filter is that the breakage due to the above-mentioned repetitive deformation load occurs early.

[0009] For this reason, there has been a situation in which a mesh made of nylon or polyester-based chemical fiber, which is resistant to repeated loads as described above, must be used as a filtration filter. In other words, the emphasis has been placed on the elimination of clogging of the filter, and the filter has been treated as a complete consumable so that the filter is replaced regularly before it is damaged.

Therefore, the filtering device of the present invention has been made in view of the above-mentioned circumstances, and a filter containing metal, which is excellent in tensile strength and abrasion resistance but is weak against repeated deformation load, is used as a filtering filter. It is an object of the present invention to provide a filtration device that can greatly extend the service life of a filtration filter regardless of the state of the cutting oil to be filtered by making it usable. That is, an object of the present invention is to provide a filtration device capable of reducing the cost required for maintenance by extending the replacement cycle of the filtration filter.

[0011]

According to the present invention, in order to solve the above-mentioned problems and achieve the object, according to the present invention, a filtered cutting oil mixed with a solid matter including cutting chips is filtered to produce a purified cutting oil. In order to obtain, the solid matter is transferred to the downstream side by a device body for storing the filtered cutting oil introduced from the charging section and the filtered purified cutting oil, and a plurality of lifting members fixed to an endless body. A filter which is rotatably provided with an opening portion opened on at least a side surface and a filter for filtering the cutting oil to be filtered is provided on an outer peripheral surface thereof; A filter device comprising: a drum; and an injection unit configured to wash the filter by injecting gas or the cleaning oil into the filter, wherein the injection device is disposed at a position higher than a liquid level of the cutting oil to be filtered. Previous The injection means, is characterized by injecting the filtration filter of a predetermined count including metal from the outside of the filtration drum.

Further, an outer peripheral surface of the filter drum is formed by a perforated plate member having a predetermined rigidity and having an infinite number of holes formed therein,
An intermediate member that forms a space of a predetermined width in the radial direction of the filtration drum is laid on the perforated plate member, and the filtration filter is laid on the intermediate member, whereby the hole and the filtration filter are in close contact with each other. It is characterized by prevention.

[0013] The intermediate member is a net member formed by knitting a wire into a net at a predetermined pitch.

[0014] The spraying means is characterized in that the spraying means is arranged to spray from a predetermined angle substantially along a tangential direction of the outer peripheral surface of the filter drum.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view in which a part of a filter device 1 according to one embodiment is cut away so that the internal structure can be seen. FIG. 2 is a cross-sectional view taken along line XX of FIG. 1 and illustrates the configuration of the filtration drum and the injection pipe.

Referring to FIGS. 1 and 2, a storage tank 2, which also serves as a mounting base for the overall components of the filtration device 1, has installation legs for horizontally adjusting and installing the floor on a factory floor. It is fixed to the four corners and installed as shown. Dirty liquid, which is the cutting oil to be filtered before filtration, is temporarily stored in the storage tank 2 with a slight change so as to have a liquid level 4 indicated by a dashed line.

In the storage tank 2, an input section 3 for introducing a cutting oil to be filtered containing cutting chips and grinding powder used in cutting or the like in a machining apparatus (not shown) is provided on the upstream side. As shown, an inclined surface portion 5 extending obliquely upward is formed on the downstream side, and a chip discharge port 6 is formed at the uppermost portion between the left and right side plates 2a and 2b, so that the chip discharge port 6 Chip recovery box 7 moved downward
It is configured so that chips G fall into the inside.

The left and right side plates 2a constituting the storage tank 2
A shaft body 11 is provided between the shafts 2b, and the filter drum 10 is rotatably supported by a pair of left and right bearings 35, 35, and is a kind of lip rubber seal having a V-shaped cross section as shown. V-seals 36 and 33 for making a liquid-tight state by slidably contacting the side surface portion of the filtration drum
Are provided so as to slidably support the filtration drum 10 in a liquid-tight state.

Further, an opening 15 is formed on the right side surface of the filtration drum 10, and the clean tank 2 is opened through an opening 13 of the right side plate 2b communicating with the opening 15.
It is configured such that the purified cutting oil after filtration can flow into c.

A chain 8 driven by a motor with a gear head (not shown) in the direction of the arrow shown in the figure has a plurality of lifting members 9 fixed as shown in FIG. The filter drum is configured to rotate in the direction of the arrow so as to mesh with the chain sprocket 12 fixed to the edge of the outer peripheral surface of the filter 10.

The injection pipe 30 cleans the filtration filter by injecting a gas containing compressed air or purified cutting oil from a plurality of nozzles 31 as shown in the drawing into a filtration filter described later. I am trying to do it.

The mounting angle of the injection pipe 30 is such that the filter can be efficiently cleaned by spraying in a substantially tangential direction of the filter drum 10 as shown in FIG. As a result, the external force generated can be directed to the rotation center side of the filtration drum. As a result, the filtration filter 19 fixed to the outer peripheral surface of the filtration drum 110 like a conventional filtration drum contracts and expands every rotation. Will not be repeated. For this reason, the vibration of the filtration filter does not occur.

Therefore, the filter 18 can be replaced with a metal mesh such as a stainless steel mesh having excellent tensile strength and abrasion resistance.

FIG. 3A is an external perspective view showing a part of the filtration drum 10 in a cutaway manner, and FIG.
FIG. 3A is a sectional view taken along line XX of FIG.

In FIG. 3, the components already described are denoted by the same reference numerals, and the description thereof is omitted. The perforated plate member is formed with an infinite number of holes having a predetermined strength and forming an outer peripheral surface. The outer peripheral surface of the filtration drum 10 is formed of a so-called punching metal 16 having a plate member in which holes 16a having a diameter of Φ5 mm to Φ8 mm are formed at a predetermined pitch. On the punching metal 16 is a net 17 which is an intermediate member for forming a space of a predetermined width in the radial direction of the filtration drum, and is formed by weaving a stainless steel wire of φ0.6 mm. Further, a filter filter 18 made of stainless steel, Kevlar or carbon fiber having a predetermined count of, for example, 60 to 300 mesh, is laid on the mesh body 17 so that the holes 16 a and the filter 18 are formed. It is designed to prevent adhesion.

The filtration filter 18 is wound on the outer peripheral surface of the filtration drum as shown in the figure, and the joint is stopped by metal fittings (not shown). The band 19 is tightened up, and then the metal fittings 20 fixed to the band are connected and fixed, so that the mounting is completed as shown in the figure, and the opposite work is performed at the time of replacement.

In the above configuration, when the filtration device is started, the purified cutting oil filtered by the filtration filter 18 flows out in the direction of the arrow in FIG. 2 to perform filtration. On the other hand, as shown in FIG. 1, solid matter G such as cutting chips settled on the bottom surface is carried obliquely upward by the raising member 9. Further, the filter filter 18 is made of gas or purified cutting oil which is vigorously injected from the injection pipe 30 by a pump (not shown).
Is washed to remove clogs after filtration.
That is, in the space above the liquid level 4, the filtration filter 1
The clogging of No. 8 is removed, and the removed chips are continuously operated so as to be returned to the dirty liquid.

As described above, a mesh containing metal, which is excellent in tensile strength and abrasion resistance but weak against repeated deformation load, can be used as a filtration filter. Regardless of the state, the service life of the filtration filter can be greatly extended.

It should be noted that the present invention is not limited to the configuration described above, and various configurations are possible. For example, a dedicated motor may be provided for driving the filtration drum. In the case where the filter is clogged and the chip is easily pierced into the outer periphery of the drum and has a relatively high specific gravity and is likely to settle, the chip is likely to settle in FIG.
It is preferable to dispose the injection pipe 30 at the position shown by the broken line.

In addition, a door-shaped nozzle is preferable for cleaning with a small amount of cleaning liquid, and a slit-shaped injection nozzle is preferable for obtaining a sufficient amount of cleaning liquid.

Further, the metal filter 18 is preferably made of stainless steel having excellent corrosion resistance, but is not limited thereto. The above-described synthetic fiber may be used, and a plate member having a great number of fine holes may be used. Needless to say. Further, the intermediate member forming a space having a predetermined width in the radial direction of the filtration drum is preferable because the above-described net 17 formed by knitting a thicker monomer can be easily laid, but other members such as a fish net may be used. Further, it goes without saying that a configuration may be adopted in which expanded metal having a coarse mesh is fixed on the reinforcing member instead of the punching metal forming the outer peripheral surface of the filtration drum.

[0033]

As described above, according to the present invention,
Although the tensile strength and abrasion resistance are excellent, the mesh containing metal, which is vulnerable to repeated deformation load, can be used as a filtration filter, thereby extending the service life of the filtration filter regardless of the condition of the cutting oil to be filtered. It is possible to provide a filtering device that can be greatly extended. In other words, by extending the replacement cycle of the filtration filter,
It is possible to provide a filtering device capable of reducing the cost required for maintenance.

[0034]

[Brief description of the drawings]

FIG. 1 is a front view of a filtration device according to an embodiment.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 (a) is an external perspective view showing a part of a filtration drum cut away. (B) is a sectional view taken along line XX of (a).

FIG. 4 is a diagram illustrating the operation of a conventional filtration device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Filtration apparatus 2 Storage tank 3 Injection port 4 Liquid level 5 Inclined surface part 6 Outlet 7 Dolly 8 Chain 9 Raising member 10 Filtration drum 16 Punching metal (perforated plate member) 17 Netting (intermediate member) 18 Filtration filter G Solid Things (chips)

Claims (4)

[Claims] 1. In order to obtain a purified cutting oil by filtering a filtered cutting oil mixed with a solid matter including a swarf, the filtered cutting oil introduced from an inlet and the filtered purified cutting oil are used. An apparatus main body for storing, a plurality of hoisting members fixed to an endless body, a plurality of hoisting members for transferring the solid matter to a downstream side and dropping the solid matter from an upper outlet of the apparatus main body; A filter drum provided on the outer peripheral surface of the filter and filtering the filter by rotating the filter drum having an opening portion opened at least on a side face thereof, and an injection unit for cleaning the filter by injecting gas or the cleaning oil into the filter. A filtering device that includes a metal filter made of a predetermined number, including metal, by the jetting means disposed at a position higher than the liquid level of the cutting oil to be filtered. Filtration apparatus, comprising spraying the outside of the arm. 2. An outer peripheral surface of the filter drum is formed by a perforated plate member having a predetermined rigidity and having a number of holes formed therein, and a space having a predetermined width in a radial direction of the filter drum is formed on the perforated plate member. The intermediate member to be formed is laid, and the filter is laid on the intermediate member to prevent the hole and the filter from sticking to each other.
3. The filtration device according to item 1. 3. The intermediate member according to claim 2, wherein the intermediate member is a net member obtained by knitting a wire into a net at a predetermined pitch.
3. The filtration device according to item 1. 4. The filter according to claim 1, wherein the jetting means is arranged to jet from a predetermined angle substantially along a tangential direction of an outer peripheral surface of the filter drum. Filtration equipment.