JPH02103288A - Method and device for reclamation of cutting oil - Google Patents

Abstract

PURPOSE: To remove foreign matters and bacteria from cutting oil and easily, economically provide recycled cutting oil by roughly filtering cutting oil sucked up from a reservoir of a machine tool, then microfiltering.

CONSTITUTION: Cutting oil is sucked up from a reservoir of a machine tool with a pump, filtered to remove large foreign matters to obtain roughly filtered cutting oil. This cutting oil is sucked up with a pump and passed through a second filter to remove most bacteria to obtain microfiltered cutting oil, which is returned to the reservoir of the machine tool. The recycling equipment is relatively less expensive and portable, and easily combined with a wide range of machine tools for recycling cutting oil.

COPYRIGHT: (C)1990,JPO

Description

[Detailed description of the invention] Machine tools such as milling machines, lathes, chucking machines, drilling machines, automatic spindle machines, and grinding machines usually include
Liquid coolants or cutting oils (including grinding oils) are used to cool the workpiece to be machined. Cutting oil is usually supplied towards the point of contact with the workpiece.

Usually, the cutting oil supply device of a machine tool is equipped with a pump that supplies cutting oil from a sump, that is, a cutting oil reservoir.
The pump pressurizes a sump conduit system that distributes the cutting oil to the desired location, and the discharged cutting oil is returned to the sump.

Mechanical power＋＋Due to machining work, chips of various sizes (
tJ]) and abrasive grains are generated, and various foreign substances are mixed into the cutting oil. These foreign objects are recirculated through the cutting oil supply system, thus contaminating the cutting oil with continuous use. Additionally, since cutting fluids are usually a mixture of water and oil, which acts as a breeding ground for bacteria, cutting fluids are also contaminated by these bacteria and, therefore,
It needs to be replaced periodically.

If foreign matter such as chips or abrasive grains gets mixed into the cutting oil,
In addition to simply having a negative impact on machining accuracy, the growth of bacteria in cutting oil is a growing health concern for machine tool workers who are constantly exposed to cutting oil.

Currently, when the cutting oil of a machine tool becomes contaminated due to the contamination of foreign matter and/or the generation of bacteria, the entire cutting oil is discarded and replaced with new cutting oil, but it is extremely difficult to replace the cutting oil with new cutting oil. It's expensive. Additionally, large, stationary cutting oil treatment equipment is used that processes and regenerates cutting oil. Such a cutting oil treatment device is always expensive, so for economical reasons only a large amount of cutting oil can be used manually. This requires complex piping equipment and cutting oil conveyance equipment. Therefore, small-scale machining companies that do not have access to stationary cutting oil disposal equipment must periodically dispose of the cutting oil and replace it with new cutting oil. There must be.

It is therefore an object of the present invention to provide a relatively inexpensive and portable
Another object of the present invention is to provide a cutting oil treatment device that can be easily combined with a wide range of machine tools to regenerate cutting oil.

Another object of the present invention is to provide a porta-pull type cutting oil treatment device using a plurality of pumps and filters, which pumps suck cutting oil from a cutting oil reservoir of a machine tool and continuously pumps the cutting oil into a plurality of filters. It is an object of the present invention to provide a cutting oil treatment device configured to pass cutting oil through a filter, remove foreign matter and bacteria from the cutting oil, and return the oil to a cutting oil supply device of a machine tool.

Another object of the present invention is to provide easy-to-maintain parts and two
An economical cutting oil reclamation system using two pumps, the first pump sucking up dirty cutting oil from the reservoir of the machine tool and passing it through a coarse filter. 4 in the reservoir attached to the frame.
Then, a second pump sucks up the coarsely filtered cutting oil from a reservoir attached to the frame, filters it through a fine filter, and then sends this twice-filtered cutting oil to the cutting oil supply device of the machine tool. An object of the present invention is to provide a recycling treatment device for cutting oil configured to return cutting oil.

Still another object of the present invention is a cutting oil treatment device comprising two electric pumps and a filter unit connected in series with each other, the storage reservoir receiving the cutting oil discharged from one of the pumps. An object of the present invention is to provide a cutting fluid treatment device having a float-operated switch configured to control a pump and a filtration cycle.

In putting the invention into practice, the first and second centrifugal pumps are supported by a frame fitted with wheels or casters, and the frame also supports a storage reservoir. The first pump is provided with a suction conduit for sucking cutting oil from the reservoir of the cutting oil supply device of the machine tool, and the first pump discharges the cutting oil into a coarse filter arranged in the reservoir. be done.

The suction conduit of the second pump communicates with the storage reservoir and its discharge ``1'' communicates with the fine filter;
Rough 2! The filtered cutting oil is sucked up and passed through a fine filter to produce purified and filtered cutting oil, which is then returned to the reservoir of the machine tool via a discharge conduit.

Each) is controlled by an electric switch connected to a float for detecting the level of cutting oil provided in the reservoir, which electric switch prevents the reservoir from overflowing or emptying. to control pump operation. Preferably, activated carbon is used in the fine filter to ensure that not only microscopic particles but also bacteria are constantly removed from the cutting fluid. Also,
Preferably, means are provided in the fine filter receiver for supporting the filter element at a distance from both ends of the receiver, so that the filter element can be easily replaced.

Does the fine filter also have a flow control on the upstream side of the filter element? ff11 means are provided which control the direction of flow of the cutting oil to provide optimum filtration and to avoid channeling when filtering through the filter element.

The parts used in the cutting oil treatment device of the present invention can be manufactured at low cost or are commonly commercially available parts, so the device can be manufactured at low cost. regeneration processing can be performed, and therefore,
Even a small-scale machining company can employ 114 people.

The above objects and advantages of the present invention will become apparent from the following detailed description of embodiments of the invention, taken in conjunction with the accompanying drawings.

The cutting oil treatment device of the present invention has a frame generally designated by the number 10, and the lower region of the frame 10 is formed by a rectangular hese 12 made of welded section steel. The frame 10 includes a cabinet I.14, in which a pump and a fine filter (filter with fine eyes) are arranged, as will be described later. Furthermore, a rectangular parallelepiped storage tank 16 with an open top is attached to the frame 10 adjacent to the cabinets 1 to 14. A cover 18 is hinged to the cabinet 14 to provide access into the cabinet 1-14.

A control panel 20 is mounted on the sloping front wall of the cabinet 14. The control panel 20 is provided with electrical switches 22, 24, a time meter 26, and an electrical connector 28, to which a power source for the electric motor is connected. Gasta 30 is attached to the frame IO so that it can be moved easily.

As shown in FIGS. 5 and 6, inside the cabinet 14 is a conventional electric centrifugal pump 32 (for example, a
A Pump model 2P390 electric centrifugal pump is provided, the pump 32 being mounted on a heath 34 identified in the bottom of the cabinet 14. The pump 32 has an inlet 36 to which a suction conduit 38 is attached. As shown in FIGS. 3 and 5, this suction conduit 3) exits through an opening in the rear wall 40 of the cabinet 1-14.

The outlet of the pump 32 communicates with an upright conduit 42, an elbow 44, and a flexible conduit 46, which exits through an opening in a plate 48 attached to the side wall of the cabinet. The storage server 16 extends into the storage server 16 as described below.

Another pump 52 is the same as the electric centrifugal pump 32 and has an inlet 54 connected to the suction conduit 56 . As shown in FIGS. 4 and 5, the suction conduit 56 is
It communicates with the lower area of the reservoir 16 through a side wall 50 of the cabinet.

The outlet of pump 52 is attached to the lower portion 60 (FIG. 7) of the fine filter, generally designated 62. An outlet boat 64 is provided in the area above the fine filter 62.
A flexible discharge conduit 66 is attached to the outlet boat 64. This discharge conduit 66 is
It extends through an opening in the rear wall 40 of the cabinet 14 and is adapted to communicate with a machine tool reservoir, as described below.

As shown in FIGS. 4 and 5, the storage reservoir 16 is
Chamber 68 with normally closed drain opening 72,74
．． It is equipped with 70. Both Chan Haro 8.70 have a pair of weir plates 76.76' arranged parallel to each other with an interval between them.
It is separated by. The vertical heights of these weir plates 76, 76' are lower than the height of the reservoir 16 in the vertical direction. Further, a floating shielding plate 78 is arranged between the two weir plates 76 and 76'. This floating shield plate 78 is
It extends vertically upward from the tops of both bulge plates 76, 76' and terminates at a position that does not reach the bottom of the lift 16. Therefore, the cutting oil in the chamber 68 is removed from the weir plate 76.
, pass through the levitation board 78, and reach the weir board 76.
' can flow into Chanhuff 0.

Inside the chamber 68 of the storage reservoir 16 is a coarse filter, that is, a filter.・80 is installed. This basket 80 has a rectangular shape with an open top.
It has a bottom comprised of a screen 82 with holes approximately 1716 inches square. Further, this pass get 80 is supported on four legs 84,
and a pair of lifting handles 86 extending upwardly from the upper end of the basket to permit removal from the reservoir 16. A conduit positioning bracket 88 is attached to one handle 86 for positioning the flexible conduit 46. The bracket 88 has an opening through which the outer end of the flexible conduit 46 can pass and is positioned such that the outlet end of the flexible conduit 46 faces the screen 82 within the basket 80. Can be done.

A pair of floats 90, 92 are provided within the chamber 70 of the reservoir 16 to enable detection of the level of cutting oil within the chamber 70. Each float 9
0.92 has a post 94 slidably attached to a bracket 96 identified on the side wall 50 of the cabinet, thereby allowing the float 90.92 and the post 94
can be raised or lowered depending on the cutting oil level. A pair of switch actuating plates 98 spaced apart from each other are attached to each of the columns 94 so that their vertical positions can be adjusted. Further, an electric switch, that is, a microswitch 1 (10) is provided between one pair of switch actuation plates 98. The operation of the pump 32 is controlled.On the other hand, a microswitch 102 is also provided between another pair of switch operation plates 98, and the microswitch 102 is configured to control the operation of the pump 52. A protective cover 104 is provided on the side wall 50 of the cabinet.
A protective cover 104 surrounds the upper portions of struts 94 and brackets 96 to protect the float and switch structure.

The structure of fine filter 62 is best shown in FIGS. 7-10. This fine filter 62 includes a cylindrical receptor 106. The receiver 106 has a circumferential flange 108 at which the upper end of the receiver 106 is sealed by a cover plate 110 and bolts 112. A filter element 114 is arranged between the lower region of the receptacle forming the upstream chamber 116 and the upper region of the receptacle forming the downstream chamber 1.18.

Filter Niremen l-114 is fine filter 62
It is preferable to construct the unit I. in a cylindrical shape so that the flow path passing through it is filled with activated carbon, so that all the cutting oil flowing through the fine filter 62 is filtered by this filter element 114. The filter element 114 includes a perforated circular plate 122 and a perforated circular plate 122.
2 and is held in place by an upper spacer 120 consisting of an upright post 124 that engages the underside of the cover plate 110. A similar perforated circular plate 126 is provided on the lower side or upstream side of the filter element 114, and the perforated circular plate 126
is supported by a post 127 located at the bottom of the receptacle 106 and engages the upstream side of the filter membrane l-114.

As shown in FIG.
A conical flow control baffle 128 is disposed within 16 . The baffle 128 is conically configured and is located adjacent to the cylindrical inner wall of the receptacle 106.
5J edge and a central opening 130 at the top of the baffle. Cutting oil entering the receiver from the inlet boat 60 of the receiver 106 of the fine filter 62 enters the baffle 128 and then passes through the opening 130 of the puffer 128 toward the central region of the perforated circular plate 126. released. The cutting oil passes through the holes 132 (FIG. 10) in the perforated circular plate 126 and passes through the filter element 1.
14 and flows upward through the holes in the perforated circular plate 122 into the L chamber 118 and into the exit boat 6 at H&.
4 into the discharge door pipe 66.

To explain how to use the cutting oil treatment apparatus of the present invention, first, the apparatus is transported using casters 30 to a machine tool glue reservoir 134 (FIG. 3) containing cutting oil to be treated. Reservoir 134 is a typical open-top tank used in many machine tools, and the tanks are typically interconnected by weirs, baffles, or the like.

A pump is provided in the chambers 136 and 138 of the reservoir 134 that receive the cutting oil.
It may also be configured to transfer the cutting oil to the other chamber or to discharge it to a cutting oil distribution device (not shown).

The cutting oil treatment device a of the present invention is installed in the reservoir 134 of a machine tool.
Once located adjacent to the reservoir 134, a suction conduit 38 is placed within one chamber (eg, chamber 13fi) of the reservoir 134.
and the exhaust conduit 66 into the other chamber (eg, chamber 138). For best results, the inlet of the suction conduit 3 and the outlet of the outlet conduit 66 are positioned so that they are maintained in spaced relation to each other.

If the machine tool reservoir is a single chamber reservoir, the inlet and outlet of both conduits 38,66 should be located at opposite ends of the reservoir.

Next, turn on switches 22 and 24, and pump 32
Activate. At this time, since the microswitch 1 (10) is closed by the float 90, the dirty cutting oil in the chamber 136 of the reservoir 134 of the machine tool is sucked up by the pump 32, and this cutting oil is discharged into the filter housing 80. The cutting oil is in the basket 80
Once inside, the cutting oil flows downwardly through the screen 82, where relatively large foreign objects such as chips or cuttings are captured on the upper surface of the screen 82. When the chamber 68 of the reservoir reservoir 16 is filled with cutting oil, the cutting oil passes over the top of the weir plate 76 and reaches the floating shield plate 78.
The liquid then passes under the dam 76' and flows into another chamber 70, over the top of the weir plate 76'.

When a sufficient amount of cutting oil flows into this chamber 70,
The float 92 is in the upper position, ', and the micro switch 102 is in the upper position.
is set to rONJ, and the pump 52 is activated.

When the pump 52 is activated, cutting oil is drawn from the chamber 70 of the storage reservoir 16 through the suction conduit 56 into the pump 52 and from the pump to the fine filter 62.
is discharged upwardly into the upstream chamber 116 of.

The cutting oil then passes through the central opening 130 of the baffle 128 and the filter mesh 14 to the downstream chamber 11.
8 from which it is discharged through a discharge conduit 66 into a chamber 138 of a reservoir 134 of the machine tool.

From the above, the cutting oil sucked by the pump 32 is transferred to the filter basket 80, the weir plate 76, 76', and the floating shield plate 7.
8, thereby minimizing the possibility of foreign matter entering the chamber 70 of the reservoir 16, and this coarsely filtered cutting oil is passed through the pump 5.
2 forcibly passes through the fine filter 114,
As a result, the chamber 13 of the machine tool glue reservoir 134
It will be appreciated that fine foreign particles and bacteria are removed from the cutting fluid before being returned to the cutting fluid. Both pumps 32
．． 52 are float actuated switches 1 (10.
102, both pumps 32.52 are cycled on and off, such that the storage reservoir 16 remains the same or the chamber 70 is completely emptied and the pump 52 is filled with air. It is possible to prevent a situation where the inflow occurs.

According to the invention, the presence of the reservoir zarpa 16 and the use of the float control switch 1 (10.102) allow the cutting oil treatment device to be activated automatically and without the need for monitoring. The cutting oil treatment system of the present invention also recirculates the cutting oil from the machine tool reservoir 134 for a sufficient period of time to provide a clean and substantially bacteria-free cutting oil. When the machine tool cutting oil treatment operation is completed, the side conduit 38.6 is removed from the machine tool reservoir.
6 is removed and the cutting oil treatment device of the present invention is moved to the next machine tool that requires cutting oil treatment.

When the basket 80 becomes full of relatively large chips or particles, the passget 80 can be easily removed from the chamber 68 of the storage reservoir 16 by the handle 86 to empty the chips or particles. When it is necessary to replace the filter element 114, open the cabinet cover 18, remove the cover plate 1-110 of the fine filter 62, remove the upper spacer 120, and remove the old filter element 1j4 from the receiver 106. It can be removed and replaced with a new filter element 114.

As described above, the cutting oil treatment device of the present invention has a relatively simple structure, and the parts used in the construction of the device can be manufactured economically and purchased from ordinary vendors. The device can be manufactured at low cost, and the cutting oil supply device for small machine tools can be serviced economically and efficiently.

It will be apparent to those skilled in the art that various modifications can be made to the embodiments described above without departing from the spirit and scope of the invention.

[Brief explanation of drawings]

FIG. 1 is a front view showing a cutting oil treatment device according to the present invention. FIG. 2 is a side view of the cutting oil treatment device shown in FIG. 1, viewed from the right side. FIG. 3 is a perspective view showing a state in which cutting oil in a cutting oil reservoir of a machine tool is being treated using the cutting oil treatment apparatus according to the present invention. FIG. 4 is a side view taken along the rl-TV line in FIG. 1. FIG. 5 is a plan view taken along the line V-V in FIG. 1. 6 is a sectional view taken along the line VT-VT in FIG. 5. FIG. FIG. 7 is a cross-sectional view of the fine filter taken along the line ■-■ in FIG. 5 in its diameter direction. FIG. 8 is a side view showing the upper spacer for positioning the fine filter (jl11). FIG. 9 is a side view showing the lower spacer for positioning the fine filter. , is a plan view seen from the x-x I'1 direction in FIG. 9. ...Storage reservoir, 32.52...Pump, 3
8.56... Suction conduit, 62... Fine filter, 68.70... Chamber of storage reservoir, 80
...Basket, 114...Filter element, 128...Baffle.

Claims (15)

[Claims] (1) A method for recycling cutting oil of a machine tool having a cutting oil circulation device equipped with a reservoir, comprising: (a) pumping up cutting oil from a reservoir of the machine tool to a first filter; (b) sucking up cutting oil; (c) sucking up the first filtered cutting oil with a pump to remove large foreign substances and coarsely filtering the filtered cutting oil with a first filter; and (d) discharging the second filtered cutting oil into a reservoir of the machine tool. Processing method. (2) The method further comprises the step of storing the first filtered cutting oil in a reservoir before pumping the first filtered cutting oil into the second filter. The method described in. 3. The method of claim 1, wherein the second filter removes a majority of bacteria from the second filtered cutting fluid. (4) In a device that recycles cutting oil for machine tools,
a frame; first and second pumps mounted to the frame and having an inlet and an outlet; a first pump connected to the inlet of the first pump for receiving cutting fluid from a machine tool; a conduit, a second conduit connected to an outlet of the first pump, and a reservoir provided in the frame, the second conduit configured to discharge cutting oil to the reservoir. a third conduit connected to the inlet of the second pump and communicating with the reservoir; a fine filter attached to the frame and having an inlet and an outlet; a fourth conduit connecting the fine filter inlet and the second pump outlet; and a fifth conduit connecting the fine filter outlet for returning filtered cutting oil to the machine tool. A recycling processing device for cutting oil for a machine tool, further comprising: (5) A coarse filter is provided in the reservoir, and the second conduit discharges cutting oil to the coarse filter, and the coarse filter discharges cutting oil to the reservoir. 5. The device according to claim 4, characterized in that: (6) A coarse filter attached to the frame,
5. The device of claim 4, further comprising an inlet in communication with the outlet of the second conduit and an outlet in communication with the reservoir. (7) The coarse filter is arranged in the reservoir and has a basket formed by a bottom wall and a side wall, and a screen shape formed in at least one of the bottom wall and the side wall so as to communicate with the reservoir. 6. The apparatus of claim 5, further comprising an opening, the second conduit discharging cutting oil into the basket. (8) the reservoir includes first and second chambers and a weir separating the two chambers, and the basket is disposed within the first chamber;
8. The apparatus of claim 7, wherein the third conduit communicates with the second chamber. (9) The apparatus according to claim 8, wherein a floating shield is disposed between the first chamber and the second chamber. (10) a first float-operated switch, the first float-operated switch being attached to the frame and having a float disposed within the reservoir to control operation of the first motor; and 5. The apparatus of claim 4, further comprising a second float actuated switch mounted to the frame and having a float disposed within the reservoir for controlling the flow rate. (11) The fine filter includes a filter element including a receptor provided with a flow path, a downstream side disposed in the flow path of the receptor and attached to the upstream side, and an upstream chamber and a downstream chamber formed on opposite sides of the receptacle adjacent to the upstream and downstream sides; and filter element positioning disposed within the receptacle to position the filter element within the receptacle. 5. The fine filter according to claim 4, further comprising: an inlet of the fine filter communicating with the upstream chamber and an outlet of the fine filter communicating with the downstream chamber. Device. 12. The device of claim 11, wherein the filter element is made of activated carbon. (13) The filter element positioning means includes a perforated plate and a spacer support fixed to the perforated plate, and the perforated plate engages with a side surface of the filter element. 12. The device according to 11. (14) Flow control means is disposed within the upstream chamber of the receptacle between the inlet of the fine filter and the upstream side of the filter element to direct the flow of cutting oil toward the filter element. 12. The device according to claim 11, characterized in that: 15. The flow control means comprises a conical deflector having a central opening and converging towards the filter element.
The device described in.