JP2008110412A - Machining liquid supplying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a machining liquid supplying device capable of establishing automatic preparation of a machining liquid as a mixture of a water-soluble oil with water and a change or adjustment of the mix proportion, and of supplying different sorts of machining liquids using a single unit of supplying device. <P>SOLUTION: By operating a first pump 61, a crude liquid is led out of a crude liquid tank 2a for water-soluble machining oil, and is mixed in a mixing part with water fed from a water intake passage 64, and the mixture is stored in a coolant tank 2b. The flow rate of the fed water is sensed by a flow rate sensor 65, and preparation is made automatically into the set mix proportion by putting the first pump 61 in operational control on the basis of the set mix proportion. By operating a second pump 71, a coolant is supplied from a first connection part 53 to the first passage of the main supply passage 5 in dual pipe structure, while a pressure air from an air source 91 is supplied to the second passage by opening a changeover control valve 95. To the second passage, oil from an oil tank 3 is supplied by operating a third pump 81. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cutting fluid or the like for lubrication and cooling, or lubrication of a cutting edge of a cutting tool (processing point for a work material) for performing machining such as cutting, grinding, and lathe machining in a machine tool. The present invention relates to a cutting fluid supply device that supplies a liquid.

  Conventionally, a water-insoluble cutting fluid, such as oil itself, oil mist air, or coolant obtained by diluting a water-soluble cutting fluid with water to a predetermined mixing ratio is supplied and sprayed on the processing point of this type of metal cutting. Things have been done. In the case of oil itself or coolant, the oil or coolant is transported from the storage tank to the vicinity of the above processing point by a pump or the like and blown out from the external nozzle or discharge hole, and in the case of oil mist air Oil and air are mixed in a mist state to form oil mist air, which is sprayed from the external nozzle or the discharge hole to the processing point. These are devices that supply the oil itself, devices that generate and supply oil mist air, or devices that supply coolant. Is provided.

  For example, the one disclosed in Patent Document 1 is known as the one that supplies oil mist air, and the one disclosed in Patent Document 2 is known as the one that supplies coolant.

JP 2002-126974 A JP-A-11-320213

  By the way, in machining of metal such as metal cutting, lubricity is mainly required for rough machining that requires a higher cooling performance than that, but for improving surface roughness during machining. On the other hand, it is necessary to ensure sufficient lubricity, such as finishing that also needs to prevent overcooling, while cooling properties need to be suppressed rather than cooling properties. There are circumstances where the required characteristics differ greatly depending on the processing type, up to the processing characteristics that need to be sufficiently secured. On the other hand, if a machine tool for supplying coolant diluted with water in order to exhibit cooling performance is attached to a machine tool, if the machine tool performs the above rough machining, its processing characteristics It will meet the requirements, but if it is to be finished, it will be incompatible to satisfy its processing characteristics.

  On the other hand, it is also conceivable to change and adjust the mixing ratio of the water-soluble cutting fluid and water constituting the coolant according to the type of processing. However, conventionally, the coolant to be used has been prepared in advance by measuring a predetermined amount of water-soluble cutting fluid and water, and mixing them with each other, and using the prepared coolant in a coolant storage tank. Therefore, if the mixing ratio is changed each time use is required, a dedicated operator for preparation is required, and the burden on the operator increases. May become excessive. Further, the above processing characteristics are, for example, intermediate between the above rough processing and finishing processing, and there are also those in medium rough processing in which lubricity and cooling properties are required to the same extent. If the mixing ratio is changed for each processing type, the labor and burden of the above-mentioned operator tends to increase more and more.

  Alternatively, it is conceivable to replace the supply device itself, for example, from a coolant supply device to an oil mist supply device in accordance with a change in the processing type. However, if the coolant supply device is removed from the machine tool and an oil mist supply device is connected instead, labor and time are required for each conversion work, and the installation environment of the machine tool depends on the storage location. It becomes complicated and the efficient use of the space is restricted.

  The present invention has been made in view of such circumstances, and the object of the present invention is to enable automatic preparation of a cutting fluid obtained by mixing a water-soluble cutting fluid and water, and to automatically adjust the mixing ratio. Another object of the present invention is to provide a cutting fluid supply device that can be changed and adjusted. In addition, it is also an object to enable various cutting fluids to be supplied by a single cutting fluid supply device in accordance with various processing characteristics.

In order to achieve the above object, in the first invention, a diluent obtained by mixing a water-soluble cutting fluid stock solution and water in a predetermined mixing ratio is supplied from the diluent tank to the nozzle body as a cutting fluid. The following specific items are provided for the cutting fluid supply apparatus configured as described above. That is, a stock solution tank for storing a stock solution of water-soluble cutting fluid, a dilution solution tank for storing a dilution solution prepared by mixing water with the stock solution and adjusted to a predetermined mixing ratio, and an operation of this pump. To detect the stock solution from the stock solution tank to the diluting solution tank, a feed channel that joins the pressure water to the feed channel and mixes the water with the stock solution, and detects the flow rate of water from the feed channel. And a control means for controlling the operation of the pump so that the mixing ratio of the stock solution and water becomes a set mixing ratio based on a detection value from the incoming water flow sensor. 1)
In the case of this invention, since the operation control of the pump is performed by the control means in accordance with the detection value from the incoming water flow sensor, the stock solution of the water-soluble cutting fluid led out to the outlet passage by the pump, the water from the inlet passage, Are mixed so as to have a set mixing ratio. As a result, the operator can save the extra work that has been done in the past, such as weighing and mixing each required amount, and automatically prepare the diluted solution. It is possible to continuously obtain a diluted solution. Further, when the set mixing ratio is changed to a different mixing ratio, control for automatic preparation by the control means is executed based on the changed mixing ratio, and the diluted liquid of the set mixing ratio after change is easily obtained. Moreover, automatic preparation is possible. As a result, it is possible to easily and surely supply a diluting liquid whose mixing ratio is changed according to the processing type.

  In the second aspect of the invention, a cutting fluid configured to supply a diluent obtained by mixing a water-soluble cutting fluid stock solution and water at a predetermined mixing ratio as a cutting fluid from the diluent tank to the nozzle body. The following specific items were provided for the supply device. That is, a stock solution tank for storing a stock solution of water-soluble cutting fluid, a dilution solution tank for storing a dilution solution prepared by mixing water with the stock solution and adjusted to a predetermined mixing ratio, and an operation of this pump. To detect the stock solution from the stock solution tank to the diluting solution tank, a feed channel that joins the pressure water to the feed channel and mixes the water with the stock solution, and detects the flow rate of water from the feed channel. Incoming flow meter to be displayed on the display unit, a setting unit that accepts and stores a setting value that is input and set to be a set mixing ratio as the operation control amount of the pump, and a setting that is stored and set by this setting unit Control means for preparing the diluent by controlling the operation of the pump based on the operation control amount (Claim 2).

  In the case of this invention, it is actually set as an initial setting operation after the cutting fluid supply device is installed and connected to the upstream end of the water intake channel so as to be supplied from, for example, a water pipe, and before the regular operation is started. Then, based on the detected incoming water flow value displayed on the display section at that time, the pump operation control amount is input to the setting section so that the desired mixing ratio is achieved. The operation is performed in advance. In the subsequent regular operation, the incoming water flow rate into the incoming water channel maintains the same constant value as that at the time of the initial setting, so that the pump is controlled by the control means based on the operation control amount input and set by the setting unit. When the operation is controlled, a water-soluble cutting fluid stock solution having a supply flow rate corresponding to the operation control amount is led to the lead-out path, and mixed with the water that has entered from the water-fill path, thereby mixing at a predetermined set mixing ratio. The diluted diluent is prepared and stored in the diluent tank. In the case of the second invention, the above-mentioned effect of labor saving obtained by the first invention can be obtained by extremely simple control as compared with the case of the first invention, and a dilution liquid having a set mixing ratio can be obtained. The automatic preparation of can also be realized reliably.

  Further, the first passage for supplying the diluent and the second passage for supplying the pressure air from the air source are extended independently from each other with respect to the internal passage of the nozzle body in the first or second invention. Can also be connected (claim 3). By doing so, it becomes possible to supply pressure air together with the diluent to the nozzle body, while easily switching between supplying the pressure air and blowing air only by stopping the dilution liquid supply. It becomes possible.

  And a water-insoluble cutting oil tank for storing the water-insoluble cutting oil, and a third passage for supplying the water-insoluble cutting oil derived from the water-insoluble cutting oil tank. It is also possible to extend the connection to the passage (claim 4). By doing so, it is easy to select and switch between supplying a diluted solution of water-soluble cutting fluid with emphasis on cooling or supplying non-water-soluble cutting fluid with emphasis on lubricity. This makes it possible to supply the optimum cutting fluid according to the type of machining. In this case, the third passage can also be used as the second passage. In this case, the water-insoluble cutting fluid is allowed to flow through the air supply passage and can be conveyed to the nozzle body by the air flow, and one passage can be omitted.

  As described above, according to the cutting fluid supply device of any one of claims 1 to 3, the operation of the pump is controlled by the control means according to the detected value from the incoming water flow rate sensor. Therefore, the diluting liquid can be automatically prepared by mixing the stock solution of the water-soluble cutting fluid led out to the lead-out path by the pump and the water from the water inlet so as to have a set mixing ratio. As a result, it is possible to save labor for a separate operation that has been conventionally performed by an operator to measure and mix the required amount, and to continue the dilute liquid that has been reliably mixed at a predetermined mixing ratio. You will be able to get In addition, by simply changing the set mixing ratio, it is possible to easily and surely prepare the diluted solution based on the changed set mixing ratio, and supply the diluted solution with the changed mixing ratio according to the processing type. Can be carried out easily and reliably.

  According to the cutting fluid supply device according to any one of claims 2 to 3, the above-described effect of labor saving of separate work that has been conventionally performed by the operator can be obtained by extremely simple control. In addition, it becomes possible to reliably perform the automatic preparation of the diluent based on the arbitrarily set mixing ratio.

  In particular, according to the third aspect, it is possible to supply pressure air together with the diluent to the nozzle body, but it is also possible to easily switch from supplying the pressure air and blowing air only by stopping the supply of the diluent. Will be able to.

  Further, according to claim 4, it is easy to select to supply the water-soluble cutting fluid diluted solution with an emphasis on cooling performance or to supply the water-insoluble cutting fluid with an emphasis on lubricity. The cutting fluid can be optimally supplied according to the type of machining. In this case, according to the fifth aspect, the water-insoluble cutting fluid can be poured into the passage for supplying air and can be conveyed to the nozzle body by the flow of air, and one passage can be omitted. become.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<First Embodiment>
FIG. 1 is a block diagram showing an example of a cutting fluid supply apparatus according to the first embodiment of the present invention. This cutting fluid supply apparatus includes a water-soluble cutting fluid diluted by mixing a water-soluble cutting fluid and water (hereinafter referred to as “coolant”), and a water-insoluble cutting fluid for lubrication (hereinafter simply referred to as “coolant”). One or a combination of cutting fluid selected from “oil” and carrier air is supplied to the tip discharge port of the nozzle body 4 installed in the vicinity of the processing point. In addition, the supply control, the automatic coolant preparation control, and the mixing ratio change control are performed by the control device 1 as a control means. The nozzle body 4 is attached to a machine tool that performs cutting and the like, and the cutting fluid supply device of the present embodiment is also attached to the machine tool.

  In the figure, reference numeral 2a is a stock tank for storing a stock solution of a water-soluble cutting fluid, and 2b is a coolant tank (a diluting liquid tank) for storing a coolant (diluted solution) that is automatically prepared by mixing water with the stock solution. 3 is an oil tank (water-insoluble cutting oil tank) for storing oil which is a water-insoluble cutting fluid, 4 is a nozzle body having a tip discharge port, and 5 is a main body for supplying cutting fluid to the nozzle body 4. It is a supply channel. And the cutting fluid supply apparatus of this embodiment mixes water with the water-soluble cutting fluid stock solution in the stock solution tank 2a to prepare a coolant having a predetermined mixing ratio, and stores the coolant in the coolant tank 2b. A coolant supply path 7 for supplying the coolant in the coolant tank 2 b to the main supply path 5, an oil supply path 8 for supplying the oil in the oil tank 3 to the main supply path 5, and pressure air from the air source 91. Is provided with an air supply path 9 for supplying the air as carrier air to the main supply path 5.

  The nozzle body 4 includes a nozzle portion attached to the tip of an external supply pipe and disposed toward the cutting tool, a tool holder that supports a cutting tool (for example, a cutting tool), and the like. It is comprised by the tool holder etc. which were provided with the discharge outlet opened toward a cutting tool. Then, the supplied cutting fluid or the like is applied to the cutting point, which is a contact point between the cutting edge of the cutting tool and the work material, by spraying from the tip discharge port constituted by the opening of the nozzle part or the discharge port. To do. As the nozzle body 4 in the figure, a tool holder having a cutting bit 41 attached to the tip is illustrated, and the cutting fluid supplied to the internal passage 42 is supplied from the discharge port 43 (see FIG. 4) to the cutting bit. It blows out toward 41.

  The main supply path 5 is provided with at least two independent passages of a first passage 51 and a second passage 52 as shown in FIG. 2A, for example. FIG. 5A shows a case where the inner tube 510 and the outer tube 520 are arranged so as to have a double tube structure. The first passage 51 is configured by the inner space of the inner tube 510, and the outer tube 520 The second passage 52 is configured by an annular space between the inner pipe 510 and the inner pipe 510. The coolant from the coolant supply passage 7 is passed through the first passage 51, and the air from the air supply passage 9 or oil from the oil supply passage 8 in addition to this is passed through the second passage 52. Yes. The first passage 51 and the second passage 52 are connected to the nozzle body 4 so that their downstream ends are both in communication with the internal passage 42 of the nozzle body 4, and a first connection portion 53 is provided at the upstream end position. Will be. A second connection portion 54 is interposed in the main supply path 5 at a position downstream of the first connection portion 53 and on the nozzle body 4 side. As shown in FIG. 3 (a), the downstream end 70 of the coolant supply path 7 and the downstream end 90 of the air supply path 9 are individually connected to the first connection portion 53. As shown in FIG. 2B, the downstream end 70 of the coolant supply path 7 is connected to the inner pipe 510, and the downstream end 90 of the air supply path 9 is connected to the outer pipe 520. As a result, the coolant is supplied to the first passage 51 in the inner pipe 510 and the air is supplied to the second passage 52 in the outer pipe 50. Further, as shown in FIG. 3 (a), the downstream end 80 of the oil supply path 8 is connected to the second connecting portion 54 so as to join in the middle, and the oil supply as shown in FIG. 3 (c). The downstream end 80 of the passage 8 is connected to the second passage 52 so that oil can be supplied to the second passage 52. In FIG. 3, symbols A, B, and C surrounded by circles correspond to those shown in FIG.

  The coolant preparation means 6 includes a first pump 61, a lead-out path 62 whose upstream end is connected to the bottom of the stock solution tank 2a and whose downstream end is connected to the top of the coolant tank 2b, and a mixing section in the middle of the lead-out path 62. And a water inlet 64 connected so as to merge into 63. Then, the water-soluble cutting fluid stock solution is led out from the stock solution tank 2a by the operation of the first pump 61 and is supplied to the mixing unit 63, while the switching control valve 65 is opened and switched so that the water flows through the water inlet 64. The coolant prepared by mixing the water-soluble cutting fluid stock solution and water in the mixing unit 63 is introduced into the coolant tank 2b and stored therein. The inlet 64 has an upstream end connected to, for example, a water pipe so that tap water is supplied at a predetermined water supply pressure. When the switching control valve 65 is opened and switched, water is supplied by the water supply pressure. Is forced to flow into the water-soluble cutting fluid stock solution passing through the mixing portion 63 so that both are mixed.

  A flow rate sensor 66 is interposed in the water inlet path 64, and the flow rate sensor 66 detects the incoming water flow rate that enters the water inlet path 64 and is mixed with the water-soluble cutting fluid so as to be output to the control device 1. It has become. The first pump 61 and the second pump 71 and the third pump 81, which will be described later, are both constituted by air-driven pumps, and the driving air supplies the air from the air source 91 to the first to third. It is supplied and driven by switching control of the switching control valves 92-93. And by the automatic preparation control mentioned later by the said control apparatus 1, a water-soluble cutting fluid undiluted | stock solution and water are mixed by a predetermined | prescribed mixing ratio, and automatic preparation and storage of a coolant are performed.

  The stock tank 2a is provided with a low water level flow switch 21, and the coolant tank 2b is provided with a low water level flow switch 22 and a high water level flow switch 23, respectively. Detection signals from these flow switches 21 to 23 are output to the control device 1, and the control device receives various detection notifications and confirmations as described later in response to the output of the detection signals. It has become.

  The coolant supply path 7 is connected so that the upstream end communicates with the bottom of the coolant tank 2 b and the downstream end 70 communicates with the inside of the first passage 51 at the first connection portion 53 of the main supply path 5. The coolant in the coolant tank 2 b is supplied to the first passage 51 of the main supply passage 5 via the check valve 72 by the operation of the two pump 71.

  The oil supply path 8 is connected so that the upstream end communicates with the bottom of the oil tank 3 and the downstream end communicates with the second passage 52 at the second connection portion 54 of the main supply path 5. The oil in the oil tank 3 is supplied to the second passage 52 of the main supply passage 5 through the check valve 82 by the operation of the three pump 81.

  Further, the air supply path 9 has an upstream end connected to the air source 91 and a downstream end connected so as to communicate with the second passage 52 at the first connection portion 53 of the main supply path 5. Pressure air is supplied to the second passage 52 through the check valve 96 and the flow rate adjusting valve 97 by the opening switching operation of the switching control valve 95. An air flow rate sensor 98 is interposed in the air supply path 9 to detect the air flow rate and output it to the control device 1.

  Next, the control contents by the control device 1 will be described. The control device 1 receives various operation commands from an operation panel (not shown), and performs automatic coolant preparation control, coolant supply control, oil supply control, Air supply control is executed.

  The automatic coolant preparation control is performed as follows. That is, in response to the setting signal for the set mixing ratio and the output of the execution command for the automatic coolant preparation from the operation panel, the first pump 61 is operated to extract the water-soluble cutting fluid stock solution from the stock solution tank 2a. Is supplied to the mixing unit 63, while the switching control valve 65 is opened to feed water from the water pipe into the mixing unit 63. At that time, the operation amount of the first pump 61 is adjusted and controlled to adjust the discharge supply amount of the water-soluble cutting fluid stock solution so that the set mixing ratio is set based on the detection value of the incoming water flow detected by the incoming water flow sensor 66. To do. Here, the adjustment control of the operation amount (discharge amount) of the first pump 61 is performed by setting the number of shots per unit time because the first pump 61 is configured to be air driven and the discharge amount per shot is determined. The switching control of the first switching control valve 92 is executed so as to correspond to the required discharge amount. The adjustment control of the operation amounts (discharge amounts) of the other pumps 71 and 81 is the same. The discharge amount per shot can be changed by adjusting the stroke of each pump 61, 71, 81. As described above, the coolant mixed and diluted at the set mixing ratio is automatically prepared, and the coolant after mixing and preparation is stored in the coolant tank 2b.

  In the automatic preparation control in this embodiment, the operation control is continued for the operation amount of the first pump 61 throughout the automatic preparation control period based on the detected water flow rate. Regarding the incoming flow rate based on the water pressure, if the connection conditions and installation conditions are the same, there will be no significant flow rate fluctuations. If the operation control amount is constant and stable within a predetermined range, the operation control amount up to that time may be fixed and the incoming water flow rate detection may be omitted.

  Further, in the coolant tank 2b, the accumulated discharge amount from the first pump 61 and the incoming water flow rate detection by the flow rate sensor 66 in the time when the storage amount from the low water level side flow switch 22 to the high water level side flow switch 23 is stored. By calculating the integrated value of the values, it is checked whether or not a coolant having a predetermined mixing ratio is prepared. Also, when a detection signal of the lower limit water level from the low water level flow switch 21 in the stock solution tank 2a is received, a guidance notification that prompts replenishment of the water-soluble cutting fluid stock solution is performed by turning on / flashing a warning lamp or performing voice guidance. This is performed for the user by means of omitted guide means. Upon receiving this guidance notification, the user removes the cap 24 and replenishes the stock solution tank 2a with the water-soluble cutting fluid stock solution.

  Furthermore, when the current cutting process by the cutting tool 41 is completed and the mixing ratio of the coolant is to be changed when changing the processing type to the next stage of cutting process, the set mixing ratio changed to the above operation panel Can be input. In this case, the control amount for the operation amount (discharging amount of the stock solution) of the first pump 61 is changed based on the changed set mixture ratio by the automatic preparation control. In the tank 2a, a new coolant is newly stored based on the changed set mixture ratio.

  Hereinafter, the supply control of the cutting fluid supplied to the nozzle body 4 will be described for each case. First, when supplying coolant and air (case 1), the coolant and air input and set in the operation panel or the like are described. On the basis of the supply command and the supply amount command to control the operation of the second pump 71 to discharge the coolant of a predetermined supply flow rate from the coolant tank 2b to the coolant supply path 7, and this coolant is supplied to the first connection portion 53. Is supplied to the first passage 51 from the air source 91, and the fourth switching control valve 95 is controlled to be opened and discharged at a predetermined supply flow rate from the air source 91 to the air supply path 9. Supply to the second passage 52. At this time, a flow rate adjustment value is set in advance in the flow rate adjustment valve 97, and air having a predetermined supply flow rate is supplied through the flow rate adjustment valve 97. Then, by executing a monitoring process that repeats a comparison determination between the flow rate adjustment value and the air amount detection value output from the air flow rate sensor 97, the air flow rate detection value is changed from the preset flow rate adjustment value to a predetermined value. If it falls off, warning notification is given to the user by guidance means that performs lighting / flashing of a warning lamp or voice guidance, as in the case of guidance notification prompting replenishment of the water-soluble cutting fluid stock solution. It has become. As described above, the coolant is supplied into the internal passage 42 of the nozzle body 4 through the first passage 51 and the pressure air through the second passage 52, and the coolant flowing into the internal passage 42 is discharged into the discharge port 43 by the pressure air. Will be blown out like a mist. Such supply control of the case 1 is preferably applied when roughing processing that particularly requires cooling properties as well as lubricity is performed by the cutting tool 41.

  Next, in the case of supplying oil in addition to the coolant and air of the case 1 (case 2), in addition to the supply control of the case 1, the third pump 81 is operated and controlled in the same manner as described above. A predetermined discharge amount of oil is discharged from the tank 3 to the oil supply passage 8, and this oil is supplied from the second connection portion 54 into the second passage 52. Thus, in addition to the air supplied from the first connection portion 53, oil is also supplied to the second passage 52 from the second connection portion 54, and the oil rides on the air flow to the internal passage 42 of the nozzle body 47. The oil is transported and supplied, and the oil is blown out from the discharge port 43 together with the coolant from the first passage 51. Such supply control of the case 2 is preferably applied to medium rough machining that requires the same level of lubricity and cooling performance.

  When oil and air are supplied (case 3), the operation of the second pump 71 is stopped, the supply of oil by the operation control of the third pump 81, and the opening switching control of the fourth switching control valve 95. The air is supplied by As a result, air and oil flow into the second passage 52 in the state where the coolant supply is stopped in the first passage 51 of the main supply passage 5, and the oil flows from the discharge port 43 through the internal passage 42 of the nozzle body 4. Will be blown out. The supply control of the case 3 is preferably applied to finishing processing that requires particularly good lubricity although cooling performance is not so required. The pressure air in the second passage 52 in each of the above cases mainly serves as carrier air for conveyance, supply, and blowing.

  Furthermore, in the case of supplying only air for air blow to remove chips at the cutting point or to clean the surface of the cutting point (case 4), the second pump 71 and the third pump Both pumps 81 are deactivated, and only the air supply by the open switching control of the fourth switching control valve 95 is executed. Thereby, the air supplied through the 2nd channel | path 52 and the internal channel | path 42 blows off from the discharge outlet 43, and can blow now.

  Although it is not divided into cases, it is of course possible to control the supply of only the coolant or only the oil.

  According to the above cutting fluid supply apparatus, the following special effects can be obtained. First, conventionally, an operator measures each of the water-soluble cutting fluid and water, mixes the measured ones with each other, separately prepares a coolant having a predetermined mixing ratio, and stores the prepared coolant in a tank of the coolant supply device. On the other hand, according to the cutting fluid supply apparatus of the present invention, the coolant having the set mixing ratio is automatically prepared in a state where the constant mixing ratio is maintained by the coolant preparation means 6 and the control device 1. In addition, the mixture ratio of the coolant can be changed and adjusted by automatic processing by changing the setting mixture ratio. As a result, the operator's work and the necessity of the operator can be omitted.

  Next, a single cutting fluid supply device can arbitrarily select and supply a cutting fluid or the like consisting of coolant, oil, or air alone or in combination according to the type of processing. As a result, a separate supply device is not required for each type of cutting fluid, and a single unit can be applied to various types of processing. For this reason, the installation space of the machine tool to which the cutting fluid supply device is attached can be made compact and can be used efficiently.

<Second Embodiment>
FIG. 4 is a front view showing a second embodiment of the present invention. This 2nd Embodiment shows the specific structural example which actualized the cutting fluid supply apparatus of 1st Embodiment more. Also, the control device 1a of the second embodiment differs from the control device 1 of the first embodiment that executes automatic coolant preparation based on fully automatic processing, and sets the set value set by the initial setting processing as a fixed value. It is configured to perform subsequent automatic preparation. This point is mainly different from the first embodiment. In other points, the second embodiment has the same configuration as the first embodiment. Hereinafter, the same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, unless otherwise specified, and the detailed description thereof is omitted. In FIG. 4, the check valves 72, 82, and 96 in the first embodiment are not shown in FIG. 4. However, in the second embodiment, these check valves are the same as in the first embodiment. It has a valve.

  In the water inlet 64 of the second embodiment, instead of the water inlet flow sensor 66 of the first embodiment, a water inlet flow meter 66a provided with a display unit 661 using, for example, a liquid crystal display is interposed. The total 66a can display the detected incoming flow rate value detected by the incoming flow meter 66a on the display unit 661. As such an incoming water flow meter 66a, a display function may be provided in addition to the incoming water flow sensor 66 of the first embodiment.

  And the control apparatus 1a is equipped with the operation panel in the front surface of the housing. The operation panel includes a power switch 10, a selection switch 11 for selecting automatic operation or manual operation, an operation switch 11 for switching operation ON / OFF, and automatic coolant preparation at a set mixture ratio. The mixing ratio setting unit 13 for setting the operation control amount of the first pump 61, the discharge amount setting unit 14 for setting the coolant supply amount from the coolant tank 2b to the coolant supply path 7, and the air flow rate supplied through the air supply path 9 An air flow rate monitoring unit 15 for monitoring is provided. In addition, although illustration is abbreviate | omitted, the setting part which sets the oil supply amount with respect to the oil supply path 8 from the oil tank 3 besides these, and each case from case 1 to case 4 demonstrated in 1st Embodiment An operation command switch, an operation switch related to coolant preparation, and the like are provided.

  Hereinafter, the contents of control by the control device 1a will be described together with the setting operations on the operation panel. First, when the power is turned on by pressing the power switch 10, not only the control device 1a but also all circuits that need to be energized can be energized. Then, selection of automatic operation or manual operation is performed by the selection switch 11, and the operation switch 12 is turned ON.

  First, initial setting is performed by a user operation. This is performed before the cutting fluid supply device is first attached to and installed in the machine tool and the subsequent regular operation in the installation environment is started. This initial setting is caused by a difference in the water supply pressure from a water pipe or the like connected to the water inlet 64 due to a difference in the installation environment of the cutting fluid supply device, a difference in installation conditions, and the like. This is done in consideration of the difference in the incoming water flow rate to the water. First, after the selection switch 11 is switched to “manual operation”, the operation switch for preparing the coolant is turned ON. As a result, the first pump 61 is operated at a predetermined or arbitrary discharge amount, and the switching control valve 65 is controlled to be opened and fed into the mixing unit 63 from the water inlet 64. Since the incoming water flow rate detection value at this time is displayed on the display unit 661 of the incoming water flow meter 66a, on the basis of the detected incoming water flow rate value displayed on the display unit 661, in order to realize the current set mixture ratio of the coolant The required operation control amount of the first pump 61 is input and set to the mixing ratio setting unit 13. At this time, if the incoming water flow rate changes due to the change in the operation amount of the first pump 61, the input set value of the operation control amount may be finely adjusted so as to match the set mixing ratio. As a result, the input operation control amount of the first pump 61 is stored in the control device 1a by the mixture ratio setting unit 13 as a fixed value for control for preparing a coolant having a desired set mixture ratio.

  In short, if water is supplied from a water pipe, it should be constant regardless of the area, etc., but the incoming water flow rate may vary depending on the installation location due to differences in the installation environment of the cutting fluid supply device. Therefore, if the operation control amount of the first pump 61 is input and set (initial setting) based on the actual water flow rate in the installation environment by the initial setting operation, the input at the initial setting is used in the subsequent normal operation. The flow rate of water does not fluctuate in a stable manner. Therefore, even when the operation control amount of the first pump 61 is automatically adjusted as a fixed value, the coolant having the set mixing ratio is stably prepared. It is.

  In the subsequent automatic coolant preparation by normal operation, after the power switch is turned ON, when the automatic switch is selected with the selection switch 11 and the operation switch 12 is turned ON, the initial setting is stored. The operation of the first pump 61 is controlled based on the operation control amount, and the water-soluble cutting fluid stock solution is supplied from the stock solution tank 2a to the mixing unit 63 at a constant flow rate corresponding to the operation control amount. Thereby, the automatic preparation of the coolant in the normal operation can be realized by extremely simple control as compared with the case of the first embodiment.

  The air flow rate monitoring unit 15 is provided with an air flow rate display unit, and the detected air flow rate value output from the air flow rate sensor 98 is displayed on the air flow rate display unit. Then, the comparison determination between the detected air flow value and the air flow value preset in the flow rate adjustment valve 98 is continuously executed, and the detected air flow value deviates from the preset value of the flow rate adjustment valve 98 by a predetermined amount or more. If this is detected, the warning notification is executed in the same manner as described in the first embodiment.

<Other embodiments>
In addition, this invention is not limited to the said embodiment, Various other embodiments are included. That is, in the said embodiment, although the air drive type is used as the 1st-3rd pumps 61, 71, 81, it is not restricted to this, The thing of various drive types of an electric drive type or a hydraulic drive type is used. Used. In the above embodiment, tap water is used as the water to be mixed with the water-soluble cutting fluid. However, the present invention is not limited to this, and water is supplied from a storage tank based on the water head pressure. Water may be used, or water supplied by pumping may be used.

  As the main supply path 5 between the first connection portion 53 and the nozzle body 4, in the above-described embodiment, an example in which the first passage 51 and the second passage 52 are formed in a double pipe structure is shown. For example, as shown in FIG. 2B, two pipes or tubes 511 and 521 may be used.

  In the above embodiment, the main supply path 5 is constituted by two mutually independent paths (first path 51 and second path 52), and the path for supplying oil (third path) is also used as the second path 52. Although an example has been shown, the main supply path may be configured by three independent paths corresponding to the coolant, oil, and air, respectively. In this case, three pipes or tubes may be simply bundled in correspondence with each passage. For example, as shown in FIG. 2 (c), a small diameter 2 is provided inside a large diameter outer tube 522. The inner pipes 512 and 550 are arranged, the first passage 51 through which the coolant flows is formed by the inner space of the inner pipe 512, the third passage 55 through which the oil flows is formed by the inner space of the inner pipe 550, and the second passage through which air flows. 52 may be configured by spaces between the outer peripheral surfaces of the inner pipes 512 and 550 and the inner peripheral surface of the outer pipe 522, respectively.

  Further, as shown in FIG. 2 (d), a pipe body 550 constituting the third passage 55 for supplying the oil or a pipe 512 constituting the first passage 51 for supplying the coolant is, for example, a nozzle body constituted by an external nozzle. 4 may be inserted into the internal passage 42a. In this case, the oil or coolant discharged from the tip opening of the pipe 550 or 512 is blown out from the discharge port 43a by the pressure air from the outer peripheral side.

  Furthermore, the controller on the machine tool side to which the cutting fluid supply device is attached and the control devices 1 and 1a of the above-described embodiments are connected to each other so that information such as command signals can be communicated with each other. A command relating to ON / OFF switching of the operation of the cutting fluid supply device and change setting of the coolant, oil or air supply amount is transmitted to the control devices 1 and 1a to control the operation of the cutting fluid device. Also good.

  In addition, in the air supply control in each of the embodiments described above, the air supply flow rate can be changed by changing the flow rate setting of the flow rate adjustment valve 97. The supply can be controlled so as to be changed to an arbitrary flow rate. In this case, for example, a flow rate adjustment valve whose air flow rate is changed by changing the opening degree in response to a control signal from the control devices 1 and 1a is used, or the flow rate adjustment valve 97 is not used. In addition to the control valve 95, one or more flow control valves having various flow characteristics are added, and the switching control valve 95 and the flow control valve are opened individually or in combination depending on the flow value to be changed. It may be activated.

It is a block block diagram which shows 1st Embodiment of this invention. 2A is an enlarged cross-sectional explanatory view of the main supply path along the line AA or BB in FIG. 1, and FIG. 2B is another view of the main supply path corresponding to FIG. FIG. 2 (c) is a cross-sectional explanatory view showing another form of the main supply path different from FIG. 2 (b), and FIG. 2 (d) is a cross-sectional explanatory view showing the nozzle body and each passage. It is sectional explanatory drawing which shows another form about this relationship. 3A is a front view showing the main supply path and the connection portion, FIG. 3B is a partially cutaway enlarged view of the first connection portion, and FIG. 3C is a view of the second connection portion. It is a partially cutaway enlarged view. It is a partially-omission front explanatory drawing which shows 2nd Embodiment of this invention.

Explanation of symbols

1,1a Control device (control means)
2a Stock solution tank 2b Coolant tank (diluent tank)
3 Oil tank (water-insoluble cutting oil tank)
4 Nozzle body 13 Mixing ratio setting section (setting section)
42 Internal passage 51 First passage 52 Second passage 55 Third passage 61 First pump 62 Derivation passage 63 Mixing section 64 Inlet passage 66 Incoming flow sensor 66a Incoming flow meter 91 Air source 661 Incoming flow meter display section

Claims (5)

A cutting fluid supply device configured to supply a diluent obtained by mixing a water-soluble cutting fluid stock solution and water at a predetermined mixing ratio as a cutting fluid from a diluent tank to a nozzle body,
A stock solution tank for storing a stock solution of a water-soluble cutting fluid, a dilution solution tank for storing a dilution solution prepared by mixing water with the stock solution and adjusted to a predetermined mixing ratio, and a pump. A lead-out path for deriving the above-mentioned stock solution from the stock solution tank to the dilution liquid tank, a water-inlet path for joining the water to the stock solution by joining the pressure water to this lead-out path, and a water-inflow for detecting the water flow rate from this water-intake path A flow rate sensor; and a control unit that controls the operation of the pump so that the mixing ratio of the stock solution and water becomes a set mixing ratio based on a detection value from the incoming water flow rate sensor. Cutting fluid supply device. A cutting fluid supply device configured to supply a diluent obtained by mixing a water-soluble cutting fluid stock solution and water at a predetermined mixing ratio as a cutting fluid from a diluent tank to a nozzle body,
A stock solution tank for storing a stock solution of a water-soluble cutting fluid, a dilution solution tank for storing a dilution solution prepared by mixing water with the stock solution and adjusted to a predetermined mixing ratio, and a pump. A deriving path for deriving the stock solution from the undiluted liquid tank to the dilution liquid tank, a water inlet path for combining pressure water into the deriving path to mix water with the stock solution, and detecting the flow rate of water flowing in from the water inlet path. An incoming water flow meter to be displayed on the display unit, a setting unit that receives and stores a setting value that is input and set as a set mixing ratio as the operation control amount of the pump, and an operation control that is stored and set by the setting unit And a control means for preparing a diluent by controlling the operation of the pump based on the amount. The cutting fluid supply device according to claim 1 or 2,
A cutting fluid supply in which a first passage for supplying the diluent and a second passage for supplying pressure air from an air source are independently extended and connected to the internal passage of the nozzle body. apparatus. The cutting fluid supply device according to claim 3,
A water-insoluble cutting fluid tank for storing the water-insoluble cutting fluid and a third passage for supplying the water-insoluble cutting fluid derived from the water-insoluble cutting fluid tank are further provided, and the third passage is the internal passage. A cutting fluid supply device that is extended and connected. The cutting fluid supply device according to claim 4,
The cutting fluid supply device, wherein the third passage is also used as the second passage.

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