JP2020066777A - Cleaning equipment and cleaning liquid regeneration method in workpiece hardening treatment equipment - Google Patents

Abstract

To provide a cleaning liquid regeneration device and a cleaning liquid regeneration method each of which, when a plurality of different kinds of hardening oil is individually used for performing hardening treatment on a workpiece, enables the cleaning liquid only to be always appropriately separated from the hardening oil with a single distiller even when the cleaning liquid is mixed with different hardening oil, and a remodeling method of workpiece hardening treatment equipment.SOLUTION: The cleaning liquid regeneration device comprises: an airtight distiller 13 to which a mixed liquid M in which cold oil, out of the cold oil and hot oil having vapor pressures different from each other, is mixed with a cleaning liquid C is introduced; a suction pump 16 which sucks gas from the distiller and reduces an internal pressure of the distiller; a pressure regulating valve 18 which is provided between the suction pump and the distiller, and regulates the internal pressure of the distiller to be lower than the vapor pressure of the cleaning liquid and higher than the vapor pressure of the cold oil in order to gasify only the cleaning liquid according to the vapor pressure of the cold oil in the mixed liquid introduced to the distiller; and a liquefaction part 19 which is provided between the pressure regulating valve and the distiller and liquefies the gasified cleaning liquid.SELECTED DRAWING: Figure 2

Description

  According to the present invention, when a plurality of different types of quenching oils (cooling oils) are individually used for quenching a work, even if the cleaning liquid is mixed with different quenching oils, a single distiller can be used. The present invention relates to a cleaning liquid regenerating apparatus and a regenerating method capable of properly separating only a cleaning liquid from these quenching oils, and a method for modifying work quenching processing equipment.

  Patent Documents 1 to 4 are known regarding a quenching facility in which a heated work is cooled with a cooling oil for quenching treatment, and then the work is washed with a cleaning liquid to wash off the cooling oil.

  The "heat treatment facility" of Patent Document 1 is a heat treatment facility for transporting an object to be treated heated in a heating chamber to a cooling chamber by a transport unit, and the transport unit performs treatment between the heating chamber and the cooling chamber. In providing a delivery chamber for delivering the objects and a greenhouse for keeping the object heated in the heating chamber at a predetermined temperature, the greenhouse is provided on at least one side of the delivery chamber in the moving direction of the transport unit. It is connected to. Patent Document 1 discloses that a transport unit that is moved along a traveling rail transports an object to be processed and performs heat treatment such as quenching.

  The "quenching method and the quenching apparatus" of Patent Document 2 includes a first cooling step of cooling at a first cooling rate from the quenching temperature to a first temperature range in which the core of the work is higher than the Ms point of the core of the work. Then, a second cooling step of cooling at a second cooling rate lower than the first cooling rate in a temperature range lower than the first temperature range, and the surface of the work after the quenching has a martensitic structure, In addition, the effective hardened layer depth of the work is larger than when the work is cooled from the quenching temperature to room temperature at the second cooling rate, and is the same as when the work is cooled from the quenching temperature to the room temperature at the first cooling rate, or The first cooling rate and the second cooling rate are controlled so that the hardness of the core of the work is small and is equivalent to that when the work is cooled from the quenching temperature to room temperature at the second cooling rate. To do It is. Patent Document 2 discloses that two types of oil, hot oil and cold oil, are used in order to change the cooling rate in the quenching process.

  The "multi-purpose atmosphere heat treatment apparatus" of Patent Document 3 lays a transportation path so as to penetrate the processing shop and the heat treatment apparatus, and provides an unmanned transportation vehicle that can travel along this transportation path. It has a holding chamber that can be replaced with an inert gas, and transfers the products to be processed received from the elevator for multi-story warehouse to each processing cell. The structure has a seal door on the facing side, and piping and various devices on the back, ceiling and front. Patent Document 3 discloses that a cell that cleans an object to be treated to which oil and fat is attached with a cleaning liquid is provided.

  In the “vacuum degreasing cleaning device” of Patent Document 4, the vacuum degreasing cleaning device main body has a cleaning chamber that is closed and has opening and closing doors at both ends, and a hollow cleaning liquid tank that surrounds the cleaning chamber. Work can be loaded and unloaded through the open / close door, and shower cleaning, immersion cleaning, high temperature jet cleaning and vacuum drying are performed in the same chamber in the cleaning chamber. Patent Document 4 discloses that the work is shower-washed before the dip cleaning so that the oils and fats attached to the work are not mixed in the dip cleaning tank and do not adversely affect the dip cleaning.

JP, 2015-206084, A JP2012-207239A JP-A-6-174377 JP, 2006-231272, A

  The quenched work is cooled with a cooling oil, and then washed with a cleaning liquid to wash off the cooling oil. When cleaning is performed with the cleaning liquid, a mixed liquid in which the cleaning liquid and the cooling oil are mixed is generated as the dirty liquid.

  Since the cleaning liquid is expensive, only the cleaning liquid is reusably separated and collected from the mixed liquid. There is a difference in vapor pressure and vaporization temperature between the cleaning liquid and the cooling oil, and the cleaning liquid has a higher vapor pressure and a lower vaporization temperature than the cooling oil. By utilizing this difference, only the cleaning liquid can be vaporized without vaporizing the cooling oil, and only the cleaning liquid can be separated and recovered from the mixed liquid in which these are mixed.

  By the way, there are various quenching conditions. Therefore, as shown in Patent Document 2 and the like, the cooling oil for cooling the workpiece also depends on the quenching condition among a plurality of different cooling oils. Any one of them is selected and used. There is a difference in vapor pressure and the like between a plurality of different types of cooling oils. Therefore, the difference in vapor pressure between the cleaning liquid and the cooling oil depends on the type of the cooling oil used.

  A high vapor pressure cooling oil having a small vapor pressure difference with the cleaning liquid (hereinafter referred to as high vapor pressure oil) and a low vapor pressure cooling oil having a larger vapor pressure difference with the cleaning liquid than the high vapor pressure oil (hereinafter, Two types of mixed liquids, which are called low vapor pressure oil), are individually supplied to a distiller whose internal pressure is reduced to a constant pressure, and a single distiller vaporizes the cleaning liquid from each mixed liquid. Consider the case of separation. If the constant pressure set in the distiller is lower than the vapor pressure of the cleaning liquid and is higher than the vapor pressure in accordance with the high vapor pressure oil (see A in FIG. 4), it is possible to use either of the two types of mixed liquids. Even if there is, only the cleaning liquid can be vaporized and separated from the mixed liquid.

  However, in the case of the mixed liquid in which the low vapor pressure oil is mixed, there is a considerable margin between the vapor pressure of the low vapor pressure oil and the constant pressure, and the cleaning liquid remaining without being vaporized cannot be thoroughly vaporized.

  Therefore, in the case of low vapor pressure oil, the cleaning liquid cannot be efficiently separated and recovered, and the cleaning liquid remains in the discarded mixed liquid, resulting in a waste.

  On the other hand, if the constant pressure is set lower than the vapor pressure of the high vapor pressure oil so as to exceed the vapor pressure of the low vapor pressure oil (see B in FIG. 4), the low vapor pressure In the case of oil, only the cleaning liquid can be efficiently separated.However, in the case of a mixed liquid containing high vapor pressure oil, the high vapor pressure oil is vaporized together with the cleaning liquid, and is collected by being mixed with the vaporized cleaning liquid. As a result, the cleaning liquid becomes a mixture of impurities (cooling oil).

  If impurities are mixed in, the cleaning power will be reduced, so that the cleaning liquid must be replaced in a short period of time, and the replacement frequency of the cleaning liquid is increased, resulting in an increase in running cost.

  As a compromise, it is conceivable to set a constant pressure to an intermediate value of the vapor pressure of both low vapor pressure oil and high vapor pressure oil (see C in Fig. 4), but the cleaning liquid is separated from the high vapor pressure oil. In this case, neither the problem that the cleaning liquid is wasted and wasted, or the problem that impurities are mixed into the cleaning liquid when separating from the low vapor pressure oil cannot be solved clearly and fundamentally.

  Furthermore, it is possible to install multiple distillers and individually adjust them to the vapor pressures of different cooling oils, but this will increase the equipment cost and increase the required installation space. There was a problem.

  Even when the cleaning liquid is vaporized and separated using the vaporization temperature, the vaporization temperature is different for a plurality of different types of cooling oils, so the constant temperature set in the distiller is set at a high vaporization temperature. The situation was the same when I adjusted it to a low cooling oil.

  The present invention has been devised in view of the above-mentioned conventional problems, and in the case where a plurality of different types of quenching oils (cooling oils) are individually used to quench a workpiece, quenching with different cleaning liquids is performed. Even if mixed with oil, a single distiller always provides a cleaning liquid regeneration device and regeneration method that can properly separate only the cleaning liquid from these quenching oils, and a work quenching equipment modification method. The purpose is to provide.

  The cleaning liquid regenerating apparatus according to the present invention is a cleaning liquid regenerating apparatus for reusably separating a cleaning liquid from a mixed liquid in which quenching oil obtained by quenching a work is mixed with the cleaning liquid for cleaning the work. An airtight distiller into which the mixed liquid in which any one of the quenching oils obtained by quenching a work is mixed with the cleaning liquid is introduced from among a plurality of different quenching oils having different vapor pressures. A suction pump for sucking gas from the distiller to reduce the internal pressure of the distiller, and the mixed liquid introduced into the distiller between the suction pump and the distiller. According to the vapor pressure of the quenching oil inside, in order to vaporize only the cleaning liquid, the internal pressure of the distiller is adjusted to a pressure lower than the vapor pressure of the cleaning liquid and higher than the vapor pressure of the quenching oil. Key to do A valve provided between the 該調 pressure valve and the evaporator, characterized by comprising a liquefaction unit for liquefying vaporized the cleaning liquid.

  The pressure regulating valve regulates the internal pressure of the distiller to a pressure value slightly higher than the vapor pressure of the quenching oil in the mixed liquid.

  The work piece is provided with a detector that detects the type of the quenching oil that has been subjected to quenching processing and outputs a detection signal, and the pressure regulating valve, in accordance with the detection signal input from the detector, of the distiller. It is characterized in that it is actuated to regulate the internal pressure.

  The cleaning liquid regenerating method according to the present invention is a cleaning liquid regenerating method for reusably separating the cleaning liquid from a mixed liquid in which quenching oil obtained by quenching a work is mixed with the cleaning liquid for cleaning the work. Then, among a plurality of different types of the quenching oils having different vapor pressures, from the mixed solution in which any one of the quenching oils obtained by quenching a work is mixed with the cleaning solution, Low, above the vapor pressure of the quenching oil, vaporize only the cleaning liquid, and then liquefy the vaporized cleaning liquid, the procedure described above wherein different quenching oils are mixed with the cleaning liquid. It is characterized in that the mixed solution is individually executed in a batch process.

  The cleaning liquid regenerating apparatus according to the present invention is a cleaning liquid regenerating apparatus for reusably separating a cleaning liquid from a mixed liquid in which quenching oil obtained by quenching a work is mixed with the cleaning liquid for cleaning the work. An airtight distiller into which the mixed liquid in which any one of the quenching oils obtained by quenching a work is mixed with the cleaning liquid is introduced from among a plurality of different quenching oils having different vaporization temperatures. And a suction pump for sucking gas from the distiller, and provided on the distiller, and vaporizes only the cleaning liquid according to the vaporization temperature of the quenching oil in the mixed liquid introduced into the distiller. In order to make the internal temperature of the distiller higher than the vaporization temperature of the cleaning liquid, below the vaporization temperature of the quenching oil temperature control means for adjusting, the distiller and the suction pump Provided between, characterized in that a liquefied portion to liquefy the vaporized above washing solution.

  The cleaning liquid regenerating method according to the present invention is a cleaning liquid regenerating method for reusably separating the cleaning liquid from a mixed liquid in which quenching oil obtained by quenching a work is mixed with the cleaning liquid for cleaning the work. Then, among a plurality of different types of the quenching oils having different vaporization temperatures, any one of the quenching oils obtained by quenching a work is mixed with the cleaning liquid, and the temperature of the cleaning liquid is higher than the vaporization temperature of the cleaning liquid. The procedure of vaporizing only the cleaning liquid at a temperature higher than the vaporization temperature of the quenching oil and then liquefying the gas of the vaporized cleaning liquid is performed by mixing the quenching oil of different kinds with the cleaning liquid. Further, it is characterized in that each of the above-mentioned mixed solutions is executed in a batch process.

  A method for modifying a work quenching treatment facility according to the present invention is characterized in that the above-mentioned cleaning liquid regenerating apparatus is provided in an existing work quenching treatment facility, and the treatment facility is modified.

  In the cleaning liquid regenerating apparatus and regenerating method and the work quenching treatment equipment remodeling method according to the present invention, a plurality of different types of quenching oils (cooling oils) are individually used for quenching a work. In this case, even if the cleaning liquids are mixed with different quenching oils, it is always possible to adequately separate only the cleaning liquids from these quenching oils in a single distiller.

1 is a schematic plan view showing an example of a work quenching treatment facility to which a cleaning liquid regenerating apparatus and a regenerating method according to the present invention can be applied. 1 is a configuration diagram showing a preferred embodiment of a cleaning liquid regenerating apparatus and a regenerating method according to the present invention. It is a Cox diagram which shows an example of the correlation of vapor pressure and vapor pressure of cleaning liquid and quenching oil. It is explanatory drawing for demonstrating the subject which this invention tends to solve.

  A preferred embodiment of a cleaning liquid regenerating apparatus and a regenerating method according to the present invention will be described below in detail with reference to the accompanying drawings. First, the cleaning liquid regenerator according to the present embodiment will be described.

  FIG. 1 shows the overall configuration of the work quenching treatment facility 1. The work W to be quenched is carried into the quenching equipment 1 by the carry-in conveyor 2, and is transferred from one end side of the transport rail 3 to the transport unit 4 traveling on the transport rail 3. The work W transferred to the transport unit 4 is transported along the transport rail 3, and is carried into the heating unit 5 from one of the plurality of heating chambers 5 arranged on both sides of the transport rail 3 by the heat treatment. To be done.

  The work W that has undergone the heating process is carried into the quenching chamber 6 from the heating chamber 5 and subjected to the quenching process. The quenching process is performed by immersing the work W in the quenching oil D in the quenching chamber 6.

  Regarding the workpiece quenching treatment facility 1, the heating chamber 5 and the quenching chamber 6 are integrally arranged next to each other as shown by a phantom line in the drawing, and the workpiece W can be stored without using the transport unit 4. The heat treatment and the quenching treatment are continuously performed. A plurality of different types of quenching oil are prepared according to the quenching conditions for the work W.

  The quenching chamber 6 is provided as a dedicated quenching chamber for each of these different types of quenching oils. When three types of quenching oils are used, the three quenching chambers have four types of quenching oils. If oil is used, four quenching chambers are provided. In the present embodiment, in order to simplify the description, hot oil having a low vapor pressure and cold oil having a high vapor pressure are exemplified as a plurality of different types of quenching oils. Corresponding to these two types of quenching oils, The quenching equipment 1 is provided with two quenching chambers 6.

  Generally, these different types of quenching oils have different vapor pressures Vc and Vh, respectively, as shown in the Cox diagram of FIG. Further, the vapor pressures Vc and Vh of the plurality of different types of quenching oils are both lower than the vapor pressure Vw of the cleaning liquid C. Then, each work W that has undergone the heat treatment is subjected to the quenching treatment in either the hot oil quenching chamber 6 or the cold oil quenching chamber 6. Hereinafter, when simply referred to as "quenching oil", it is meant to include both hot oil and cold oil.

  The work W that has undergone the quenching process is transferred from the quenching chamber 6 to the transport unit 4 again, transported along the transport rails 3, processed in the tempering chamber 5a, and then loaded into the cleaning chamber 7. . In the cleaning chamber 7, a cleaning process for cleaning the quenching oil from the work W with the cleaning liquid C is performed. Since the cleaning process is performed regardless of the type of quenching oil, one cleaning chamber 7 is provided.

  The workpiece W that has undergone the cleaning process is transferred from the cleaning chamber 7 to the transfer unit 4 again, and is transferred from the transfer unit 4 to the transfer conveyor 8 on the other end side of the transfer rail 3 and is transferred to the transfer conveyor 8. It is carried out from the quenching treatment facility 1.

  In the cleaning chamber 7 where the quenching oil has been washed away with the cleaning fluid C, a mixed solution M in which the quenching oil and the cleaning fluid C are mixed is produced. As shown in FIGS. 1 and 2, the cleaning chamber 7 is provided with a cleaning liquid recovery facility 9 for reusably separating and recovering only the cleaning liquid C from the mixed liquid M.

  A shower 10 for spraying the cleaning liquid C toward the loaded work W is provided on the ceiling of the cleaning chamber 7. In the lower part of the cleaning chamber 7, a mixed liquid M in which the cleaning liquid C sprayed from the shower 10 and the quenching oil washed off the work W with the cleaning liquid C are mixed is collected.

  The shower 10 is connected to a cleaning liquid pipe 11 for supplying the cleaning liquid C thereto, and a lower part of the cleaning chamber 7 is connected to a mixed liquid pipe 12 for discharging the mixed liquid M from the cleaning chamber 7. A storage tank 29 for temporarily storing the mixed liquid M is provided in the mixed liquid pipe 12. The cleaning chamber 7 and the cleaning liquid recovery equipment 9 are connected to each other by the cleaning liquid pipe 11 and the mixed liquid pipe 12.

  The cleaning liquid recovery equipment 9 is provided so as to surround an airtight distiller 13 into which the mixed liquid M is introduced from the mixed liquid pipe 12 and a substantially lower part of the distiller 13 in order to stabilize the temperature inside the distiller 13. Of the heat storage tank 14 and the distiller 13 via the suction pipe 15, and a suction pump 16 for sucking gas from the distiller 13 to reduce the internal pressure of the distiller 13, and a suction pump 16. An exhaust pipe 17 that is connected and discharges exhaust gas from the suction pump 16, and is interposed between the suction pump 16 and the distiller 13 and is provided in the suction pipe 15 to adjust the internal pressure of the distiller 13. Of which the opening degree can be adjusted, a liquefier 19 as a liquefaction unit which is located between the pressure regulation valve 18 and the distiller 13 and which is provided in the suction pipe 15, and is collected in the liquefier 19. Cleaning liquid connected via the piping 20 for 21, a replenishment pipe 23 having a replenishment valve 22 for replenishing the washing liquid C to the washing liquid tank 21, and a waste oil pipe 25 having an oil discharge valve 24, which is connected to the lower portion of the distiller 13 via a waste oil pipe 25. It comprises a waste oil tank 26 for temporarily storing the waste oil D discharged from the bottom of the container 13, and a drain pipe 28 having a drain cock 27 for discharging the waste oil D from the waste oil tank 26.

  The cleaning liquid tank 21 is connected to the cleaning liquid pipe 11 having an opening / closing valve 36 in order to supply the cleaning liquid C to the shower 10 in the cleaning chamber 7. The cleaning liquid C is sent to the shower 10 by pressurizing the upper space in the cleaning liquid tank 21. The cleaning chamber 7 may have a negative pressure and the cleaning liquid C may be sucked therein. In the mixed solution pipe 12 for introducing the mixed solution M from the cleaning chamber 7 to the still 13, the flow rate of the mixed solution M from the cleaning chamber 7 to the storage tank 29 and the introduction of the mixed solution M from the storage tank 29 to the still 13. On / off valves 30 and 31 are provided between the cleaning chamber 7 and the storage tank 29 and between the storage tank 29 and the distiller 13 in order to control the flow rate.

  Since the distiller 13 is kept at a negative pressure by the suction pump 16, the liquid mixture M stored in the storage tank 29 is sucked into the distiller 13 by opening the opening / closing valve 31.

  Further, the cleaning liquid recovery facility 9 is provided with a control system 32 for controlling the operation of the pressure regulating valve 18 to regulate the internal pressure of the distiller 13. The control system 32 is provided in the distiller 13, is connected to the pressure gauge 33 that detects and outputs the internal pressure of the distiller 13, the pressure gauge 33 and the pressure regulating valve 18, and is input from the pressure gauge 33. The controller 34 determines the opening degree of the pressure regulating valve 18 and outputs it to the pressure regulating valve 18 so that the internal pressure of 13 becomes the set pressure.

  Further, in the present embodiment, the work W is controlled by the controller 34 in order to automatically control the opening degree of the pressure regulating valve 18, that is, the internal pressure of the distiller 13 in accordance with the vapor pressures of a plurality of different types of quenching oils. A sensor 35 is provided as a detector for detecting and outputting which of a plurality of different types of quenching oil that has been quenched.

  For example, the work W is provided with a tag that displays the type of quenching oil for quenching the work W, and the sensor 35 reads the tag and the type of quenching oil for each work W. It is designed to detect The sensor 35 is connected to the controller 34, and the type of quenching oil detected by the sensor 35 is input to the controller 34.

  When the controller 34 treats the mixed solution M containing any one of a plurality of different types of quenching oils in the distiller 13, the internal pressure of the distiller 13 determines the vapor pressure of the quenching oil contained in the mixed solution M. The suction action of the suction pump 16 acting on the suction pipe 15 is adjusted by the opening degree of the pressure regulating valve 18 so that the vapor pressure slightly exceeds.

  The mixed liquid M is introduced into the distiller 13 from the mixed liquid pipe 12. When the work W hardened with cold oil is washed in the washing chamber 7, the mixed solution M containing only cold oil is introduced, and when the work W hardened with hot oil is washed in the washing chamber 7, Only one kind of quenching oil is mixed in the distiller 13 so that the hot oil and the cold oil do not mix such that the mixed solution M containing only The mixed solution M is introduced in a batch process.

  In other words, in the cleaning chamber 7, cleaning is performed for each type of quenching oil, and the mixed liquid M at that time is introduced into the distiller 13 in one batch.

  The distiller 13 receives the mixed solution M introduced from the mixed solution pipe 12 in order to vaporize the mixed solution M, specifically, only the cleaning solution C to promote the separation from the quenching oil. A tray 13a is provided. The tray 13a is formed with a large planar outer dimension so that the mixed liquid M received on the tray 13a flows down while spreading over a considerable residence time, and is arranged so as to be inclined so as to form a slope. To be done. In the figure, an example in which the trays 13a are provided in three stages is shown.

  In the tray 13, the mixed liquid M from the mixed liquid pipe 12 is slowly flowed down due to the slope. The mixed solution M flows down to the upper end side of the slope, and while the cleaning solution C is vaporized from the mixed solution M while flowing down the slope and reaches the lower end side of the slope, it flows down from the lower end side to the bottom of the distiller 13. It has become. Therefore, the cleaning liquid C is mainly vaporized during the retention period on the tray 13a. As described in the background art, it is desirable to efficiently vaporize the cleaning liquid C during this retention period, and the cleaning liquid C that could not be vaporized will flow down from the tray 13a.

  The mixed liquid M flowing down to the bottom of the distiller 13 and collected is the waste oil D, and the closed oil discharge valve 24 is opened, so that the mixed liquid M is collected in the waste oil tank 26 through the waste oil pipe 25 and is collected in the waste oil tank 26. The collected waste oil D is discharged from the cleaning liquid recovery equipment 9 when the closed drain cock 27 is opened.

  The temperature of the mixed liquid M introduced into the distiller 13 differs between hot oil and cold oil. On the other hand, the internal temperature of the distiller 13 is stably maintained approximately constant by the heat storage tank 14. The heat storage tank 14 is a tank filled with the heat transfer oil F, and a heater 14 a for heating the heat transfer oil F is provided inside the heat storage tank 14 to adjust the temperature inside the distiller 13 by indirect heating. To do.

  Although not shown, a flow path for heat transfer oil is provided on the lower surface of the tray 13a, and the heat transfer oil heated by the heater 14a is circulated and supplied by a pump. By doing so, the vaporization of the cleaning liquid C is promoted.

  Further, the heat storage tank 14 is provided with a thermometer 14b for measuring the internal temperature thereof, and in order to make the internal temperature of the distiller 13 approximately constant, the heater 14a is provided in accordance with the temperature detected by the thermometer 14b. Driven or stopped.

  The suction pump 16 sucks gas from the inside of the distiller 13 to reduce the internal pressure, and thereby the cleaning liquid C from the mixed liquid M inside the distiller 13 is vaporized. Further, the suction pump 16 also sucks the vaporized cleaning liquid C from the distiller 13, and the vaporized portion of the suctioned cleaning liquid C is supplied to the liquefier 19 via the suction pipe 15.

  The liquefier 19 is provided with a cooler 19a that lowers the internal temperature of the liquefier 19 in order to liquefy the cleaning liquid C that is vaporized and separated from the quenching oil. The cleaning liquid C that has been liquefied from the vaporized state by cooling is collected at the bottom of the liquefier 19, and sent from the bottom of the liquefier 19 to the cleaning liquid tank 21 via the recovery pipe 20 to be recovered. When replenishment is required, the replenishment valve 22 that has been closed is opened to replenish the cleaning liquid tank 21 with new cleaning liquid C from the replenishment pipe 23.

  The pressure regulating valve 18 is provided between the liquefier 19 and the suction pump 16, and basically keeps the internal pressure of the distiller 13 constant by adjusting the opening degree thereof, and vaporizes only the cleaning liquid C. For the purpose, the internal pressure of the distiller 13 due to the depressurizing action of the suction pump 16 is switched to a first pressure or a second pressure which will be described later and is constantly adjusted.

  A controller 34 is connected to the pressure regulating valve 18, and according to the internal pressure of the distiller 13 detected by the pressure gauge 33 and input to the controller 34, the internal pressure of the distiller 13 is maintained at a substantially constant pressure. Then, the opening is controlled.

  In addition, the pressure regulating valve 18 receives the opening control signal corresponding to the type of quenching oil detected by the sensor 35 from the controller 34, so that the internal pressure of the distiller 13 corresponds to the cold oil. It is operated to switch and hold the first pressure or a second pressure corresponding to hot oil.

  When the opening of the pressure regulating valve 18 is small, the depressurizing action is weakened and the internal pressure of the distiller 13 is maintained relatively high. The internal pressure of is low.

  Then, the pressure regulating valve 18 is adjusted in its opening degree so that the depressurizing action is weakened when the mixed liquid M in which cold oil having a high vapor pressure is mixed is introduced into the distiller 13, and thereby the depressurizing action is weakened. When the internal pressure is adjusted to a first pressure slightly higher than the vapor pressure Vc of cold oil and the mixed liquid M in which hot oil having a low vapor pressure is mixed is introduced into the distiller 13, the depressurizing action becomes strong. The degree of opening is adjusted so that the internal pressure of the distiller 13 is adjusted to a second pressure that is slightly lower than the vapor pressure Vh of the hot oil, which is lower than that in the case of cold oil.

  That is, the controller 34 connected to the pressure gauge 33 and the sensor 35 responds to the vapor pressures Vc and Vh of each quenching oil for each type of quenching oil contained in the mixed liquid M introduced into the distiller 13. Thus, the pressure regulating valve 18 is controlled by batch processing so that the internal pressure of the still 13 is maintained at the first pressure or the second pressure.

  In the case of cold oil or hot oil, by adjusting the first pressure or the second pressure slightly higher than the vapor pressure Vc, Vh of each quenching oil, only the cleaning liquid C is vaporized quickly and surely. .

  Here, "slightly higher" means that the cleaning liquid C surely approaches the vaporization condition of the quenching oil that vaporizes, and specifically, it is about 0. It means that it exceeds about 5 kPa to 3.0 kPa.

  Next, a method of collecting the cleaning liquid according to this embodiment will be described. The process of separating and recovering only the cleaning liquid C from the mixed liquid M in which the quenching oil and the cleaning liquid C are mixed is performed for each work W that can be washed with different types of quenching oil. Batch processing is performed as one batch.

  Further, the processing of one batch means that after the cleaning of the work W is started from the time when the cleaning of the work W is started in the cleaning chamber 7, all the mixed liquid M is discharged from the cleaning chamber 7 and the storage tank 29 Is also empty, the introduction of the mixed liquid M from the storage tank 29 to the distiller 13 is interrupted, and further, the cleaning liquid C using the tray 13a in the distiller 13 has been separated from the quenching oil by vaporization and all vaporized. The cleaning liquid C is liquefied by the liquefier 19 and is a period until the cleaning liquid C is completely collected in the cleaning liquid tank 21.

  That is, the vaporization / recovery process of the cleaning liquid C is performed in a state where different quenching oils do not exist in the series of devices from the cleaning chamber 7 to the cleaning liquid recovery facility 9. Further, when a plurality of works W that have been subjected to the quenching treatment with the same quenching oil are successively washed in the washing chamber 7, the cleaning liquid C is added every time one workpiece W is washed in the washing chamber 7. It is not necessary to carry out the vaporization / recovery process, and the mixed solution M generated by the continuous cleaning process of the same quenching oil is stored in the storage tank 29, and this is treated as one batch to be vaporized / collected. Is also good.

  When cleaning the workpiece W that has been quenched and carried into the cleaning chamber 7 from the transport unit 4 in the cleaning chamber 7, the workpiece W is quenched by any one of a plurality of different types of quenching oils. Whether it is cold oil or hot oil is detected by reading the tag of the work W by the sensor 35, and is input to the controller 34.

  When the suction pump 16 is activated, the controller 34 causes the pressure regulating valve 18 to control the first pressure (vapor pressure) in which the internal pressure of the distiller 13 corresponds to the type of quenching oil, for example, the vapor pressure Vc of cold oil. The pressure is slightly higher than Vc), and the opening is adjusted to be kept constant. Hereinafter, the case of cold oil will be described as an example.

  In the cleaning chamber 7, cleaning of cold oil attached to the work W is started. During the period from the start of cleaning to the end of cleaning, a mixed solution M in which cold oil and the cleaning solution C are continuously mixed is generated, and the mixed solution M is collected and accumulated in the lower part of the cleaning chamber 7.

  As described above, when the cold oil obtained by quenching the work W is mixed with the cleaning liquid C for cleaning the work W so that only the cleaning liquid C is reusable, the mixed liquid M in the cleaning chamber 7 is separated. The flow rate of the liquid flowing through the mixed liquid pipe 12 is controlled by the opening / closing valves 30 and 31, and is temporarily stored in the storage tank 29, and is sequentially supplied to the distiller 13 via the storage tank 29.

  The internal pressure of the distiller 13, which is maintained at a substantially constant temperature by the heat storage tank 14, is continuously detected by the pressure gauge 3, and the controller 34 regulates the pressure under the depressurizing action of the suction pump 16 sucking the gas. The opening degree of the valve 18 is controlled and adjusted and maintained at the first pressure slightly higher than the vapor pressure Vc of the cold oil.

  Under this first pressure, only the cleaning liquid C is vaporized and the cleaning liquid C is separated from the cold oil from the mixed liquid M introduced into the tray 13a and flowing down the slope while spreading, without vaporization of the cold oil. The cleaning liquid C separated and vaporized from the cold oil is circulated in the suction pipe 15 by the suction action of the suction pump 16 and reaches the liquefier 19. The cleaning liquid C is liquefied by the liquefier 19 and collected in the cleaning liquid tank 21.

  In the liquefaction / recovery of the cleaning liquid C, after the cleaning of the workpiece W is completed, the entire amount of the mixed liquid M accumulated in the bottom of the cleaning chamber 7 is entirely processed in the distiller 13 via the storage tank 29 and further vaporized. The cleaning liquid C is completely liquefied by the liquefier 19 and is collected in the cleaning liquid tank 21.

  After the separation and recovery of the cleaning liquid C from the mixed liquid M containing the cold oil obtained by quenching the work W are completed, the next time the workpiece W quenched by hot oil is carried into the cleaning chamber 7 Similarly to the above, the detection signal of the type of quenching oil from the sensor 35 is input to the controller 34, and the controller 34 keeps the internal pressure of the distiller 13 constant at a second pressure slightly higher than the vapor pressure Vh of the hot oil. The opening degree of the pressure regulating valve 18 is adjusted so as to be held at.

  When processing hot oil different from cold oil, the mixed solution M containing cold oil is empty between the cleaning chamber 7 and the distiller 13, and the hot oil and the cleaning solution C are mixed together. Only the liquid M is distributed.

  When the mixed solution M containing the hot oil is introduced into the distiller 13, the vaporization of the hot oil occurs from the mixed solution M introduced into the tray 13a under the second pressure slightly higher than the vapor pressure Vh of the hot oil. However, only the cleaning liquid C is vaporized and separated from the hot oil, and the vaporized cleaning liquid C is recovered in the cleaning liquid tank 21 in the same manner as in the case of cold oil.

  In both cases of hot oil and cold oil, only the cleaning liquid C is collected in the cleaning liquid tank 21, and this cleaning liquid C is reused in the subsequent cleaning process.

  In the cleaning liquid regenerating apparatus and the regenerating method according to the present embodiment, when reducing the internal pressure of the distiller 13 by the suction pump 16, the internal pressure of the distiller 13 is batch processed by the pressure regulating valve 18. According to the vapor pressures Vc and Vh of the cold oil or the hot oil mixed in the mixed liquid M introduced into the distiller 13 at, the first and second pressures slightly higher than the vapor pressures are adjusted and maintained. As a result, the cleaning liquid C can be vaporized at a pressure as low as possible, which is lower than the vapor pressure Vw of the cleaning liquid C. Therefore, no matter which quenching oil is used, only the cleaning liquid C can be vaporized quickly and reliably and separated from the quenching oil. The cleaning liquid C can always be appropriately collected and reused in the distiller 13 of FIG.

  Since only the cleaning liquid C is separated and collected, the deterioration of the cleaning power of the cleaning liquid C can be suppressed, the usage period of the cleaning liquid C that is repeatedly reused can be extended, and the cost and maintenance time for replacing the cleaning liquid C can be reduced. be able to.

  Further, since the cleaning liquid C can be vaporized by controlling the opening degree of the pressure regulating valve 18, it is possible to reliably separate only the cleaning liquid C from the mixed liquid. Since the cleaning liquid C can be reliably separated in this way, it is possible to prevent the unseparated cleaning liquid C from being discharged from the waste oil pipe 25 of the distiller 13 and prevent the expensive cleaning liquid C from being wastefully discarded.

  Since the internal pressure of the distiller 13 detected by the pressure gauge 33 is input to the controller 34 and the controller 34 controls the opening of the pressure regulating valve 18, only the cleaning liquid C can be surely vaporized.

  The type of quenching oil detected by the sensor 35 is input to the controller 34, and the controller 34 controls the opening degree of the pressure regulating valve 18 in accordance with the vapor pressures of the quenching oils of different types. Therefore, the single distiller 13 can accurately separate only the cleaning liquid C from the quenching oil having different vapor pressures.

  In the above embodiment, the sensor 35 is used to automatically control the opening of the pressure regulating valve 18, but instead of this, the opening of the pressure regulating valve 18 is manually adjusted according to the type of quenching oil. You may change it.

  Next, modified examples of the cleaning liquid regenerating apparatus and the regenerating method according to the above embodiment will be described. As shown in FIG. 3, the cleaning liquid and various quenching oils have not only a difference in vapor pressure at any given temperature but also a difference in vaporization temperature at any given vapor pressure. It is well known that (vaporization temperature of cleaning liquid C: Tw, vaporization temperature of cold oil: Tc, vaporization temperature of hot oil: Th).

  In the modification, paying attention to the difference in vaporization temperature, the heat storage tank 14 provided in the distiller 13 is used as a temperature adjusting means, and the vaporization temperature of the quenching oil in the mixed liquid M introduced into the distiller 13 is used. In order to vaporize only the cleaning liquid C in a batch process according to the above, the internal temperature of the distiller 13 is higher than the vaporization temperature of the cleaning liquid C and slightly lower than the vaporization temperature of the quenching oil by adjusting the temperature of the heat storage tank 14. You may make it adjust to temperature. In this case, the thermometer 14b is replaced by the pressure gauge 33, and the pressure regulating valve 18 is unnecessary.

  At that time, the internal temperature of the distiller 13 is set to a temperature slightly below the vaporization temperature at which the quenching oil does not vaporize and is set to a temperature as high as possible higher than the vaporization temperature of the cleaning liquid C, so that only the cleaning liquid C can be rapidly activated. It is possible to surely vaporize, and it is possible to obtain the same effect as that of the above-described embodiment.

  Here, "slightly below" means that the cleaning liquid C is surely brought close to the vaporization condition of the quenching oil, so that it is about 5 ° C. higher than the vaporization temperature of the quenching oil. It means that the temperature is below about 15 ° C.

  Even in this modified example, the type of quenching oil may be detected by the sensor 35, and the temperature of the heat storage tank 14 may be automatically set and changed according to the type.

  However, while it takes a while for the internal temperature of the still 13 to change, the internal pressure can be changed instantaneously only by changing the opening degree of the pressure regulating valve 18, and the working time can be shortened.

  The cleaning liquid regenerator according to the above-described embodiment may be provided in an existing work quenching treatment facility and the facility may be modified.

  In this case, for example, if the existing work quenching treatment facility is provided with the cleaning chamber 7, the distiller 13, the liquefier 19, and the suction pump 16, the steam pressure as shown in FIG. In the case of control, at least a pressure adjusting valve 18 for adjusting the internal pressure of the distiller 13 is added, and the internal pressure of the distiller 13 can be adjusted to a desired pressure by adjusting the opening degree of the pressure adjusting valve 18. Can be configured as.

  Further, in the case of vaporization temperature control, at least a temperature adjusting means (heat storage tank 14) for adjusting the internal temperature of the distiller 13 is added, and the internal temperature of the distiller 13 is set to a desired temperature by this temperature adjusting means. It may be configured to be adjustable.

  Even when modifying the existing work quenching processing equipment, it can be modified very easily and easily. Further, by this remodeling method, it is possible to secure the same effects as those of the above embodiment.

1 Work hardening processing equipment 2 Conveyor for carrying in 3 Conveying rail 4 Conveying unit 5 Heating room 5a Tempering room 6 Quenching room 7 Cleaning room 8 Carrying out conveyor 9 Cleaning liquid recovery equipment 10 Shower 11 Cleaning liquid pipe 12 Mixed liquid pipe 13 Distiller 13a tray 14 heat storage tank 14a heater 14b thermometer 15 suction pipe 16 suction pump 17 exhaust pipe 18 pressure regulating valve 19 liquefier 19a cooler 20 recovery pipe 21 cleaning liquid tank 22 replenishment valve 23 replenishment pipe 24 oil discharge valve 25 waste oil pipe 26 Waste Oil Tank 27 Drain Cock 28 Drain Pipe 29 Storage Tank 30, 31 Open / close Valve 32 Control System 33 Pressure Gauge 34 Controller 35 Sensor 36 Open / close Valve C Cleaning Liquid D Waste Oil F Heat Transfer Oil M Mixed Liquid Tc Cold Oil Vaporization Temperature Th Hot Oil Vaporization temperature of Tw Cleaning solution Vapor pressure W workpiece vapor pressure Vw cleaning liquid vapor pressure Vh hot oil temperature Vc cold oil

According to the present invention, when a plurality of different types of quenching oils (cooling oils) are individually used for quenching a work, even if the cleaning liquid is mixed with different quenching oils, a single distiller can be used. The present invention relates to a cleaning equipment in a work quenching treatment equipment capable of properly separating only a cleaning fluid from these quenching oils , a method of regenerating the cleaning fluid of the work quenching treatment equipment, and a method of modifying the work quenching treatment equipment.

The present invention has been devised in view of the above-mentioned conventional problems, and in the case where a plurality of different types of quenching oils (cooling oils) are individually used to quench a workpiece, quenching with different cleaning liquids is performed. Even if mixed with oil, a single distiller can always separate only the cleaning liquid from these quenching oils properly, so that the cleaning equipment in the work quenching equipment and the cleaning fluid in the work quenching equipment can be regenerated. An object of the present invention is to provide a method and a method for modifying a work quenching treatment facility.

The cleaning equipment in the work quenching treatment equipment according to the present invention is a work quenching treatment equipment including a heating chamber, a quenching chamber, and a washing chamber, and the cleaning liquid regenerating device in the cleaning chamber quenches the work. In order to reusably separate the cleaning liquid from the mixed liquid in which the quenching oil was mixed with the cleaning liquid for cleaning the work, the work was quenched among a plurality of different types of the above-mentioned quenching oils having different vapor pressures. An airtight distiller into which the mixed liquid in which any one of the quenching oil is mixed with the cleaning liquid is introduced ; Suction for sucking gas from the distiller to reduce the internal pressure of the distiller pump and; provided between the suction pump and the evaporator, depending on the vapor pressure of the quenching oil in the mixed liquid that is introduced into the distiller, to vaporize only the washing solution, the distillation Of the internal pressure lower than the vapor pressure of the cleaning fluid, pressure regulating valve and for adjusting the pressure above the vapor pressure of the quenching oil; provided between the該調pressure valve and the evaporator, vaporizing A liquefaction unit for liquefying the cleaning liquid thus obtained; and a detector for detecting the type of the quenching oil that has quenched the work and outputting a detection signal, wherein the pressure regulating valve is input from the detector. It is operated to adjust the internal pressure of the still according to the detection signal .

The pressure regulating valve regulates the internal pressure of the distiller to a pressure value that is 0.5 kPa to 3.0 kPa higher than the vapor pressure of the quenching oil in the mixed liquid.

A method of regenerating a cleaning liquid of a work quenching treatment facility according to the present invention is used in the work quenching treatment facility, and a quenching oil quenching a work is mixed with a cleaning liquid for washing the work. What is claimed is: 1. A method of regenerating a cleaning liquid for reusable separation, wherein, among a plurality of different types of the above-mentioned quenching oils having different vapor pressures, any one of the quenching oils obtained by quenching a work is the cleaning liquid. A step of vaporizing only the cleaning liquid from the mixed liquid mixed with the above liquid under a pressure lower than the vapor pressure of the cleaning liquid and higher than the vapor pressure of the quenching oil, and then liquefying the vaporized cleaning liquid. Is performed in a batch process for each of the mixed solutions in which different types of quenching oils are mixed with the cleaning solution.

The cleaning equipment in the work quenching treatment equipment according to the present invention is a work quenching treatment equipment including a heating chamber, a quenching chamber, and a washing chamber, and the cleaning liquid regenerating device in the cleaning chamber quenches the work. In order to reusably separate the cleaning liquid from the mixed liquid in which the quenching oil was mixed with the cleaning liquid for cleaning the work, the work was quenched among a plurality of different types of the above-mentioned quenching oils having different vaporization temperatures. An airtight distiller into which the mixed liquid in which any one of the quenching oils is mixed with the cleaning liquid is introduced ; a suction pump for sucking gas from the distiller ; provided in the distiller, According to the vaporization temperature of the quenching oil in the mixture introduced into the distiller, the vaporization temperature of the distiller is set higher than the vaporization temperature of the washing liquid in order to vaporize only the washing liquid. A temperature adjusting means for adjusting a temperature below the vaporization temperature of the hardening oil; provided between the evaporator and the suction pump, the liquefied portion and to liquefy the vaporized said cleaning fluid; quenching the workpiece And a detector that outputs a detection signal by detecting the type of the quenching oil that has been processed, the temperature adjusting means, in accordance with the detection signal input from the detector, the internal temperature of the distiller It is characterized in that it is actuated to adjust .

A method of regenerating a cleaning liquid of a work quenching treatment facility according to the present invention is used in the work quenching treatment facility, and a quenching oil quenching a work is mixed with a cleaning liquid for washing the work. What is claimed is: 1. A method of regenerating a cleaning liquid for reusably separating the cleaning liquid, wherein, among a plurality of different types of the quenching oils having different vaporization temperatures, any one of the quenching oils obtained by quenching a work is the cleaning liquid. From the mixed liquid mixed with the above, the cleaning liquid alone is vaporized at a temperature higher than the vaporization temperature of the cleaning liquid and lower than the vaporization temperature of the quenching oil, and then the vaporized gas of the cleaning liquid is liquefied. The procedure described above is performed in a batch process for each of the mixed liquids in which different kinds of quenching oils are mixed with the cleaning liquid. Further, the above-mentioned work quenching treatment facility is used, and the internal pressure or internal temperature of the distiller is changed by cleaning treatment of different types of quenching oil for each batch treatment.

The method for modifying work quenching processing equipment according to the present invention is characterized by modifying the cleaning equipment in the existing work hardening processing equipment to the cleaning equipment in the work hardening processing equipment .

A plurality of different types of quenching oils (cooling oils) are provided in the cleaning equipment in the work quenching treatment equipment and the method for regenerating the cleaning liquid for the work quenching treatment equipment and the method for modifying the work quenching treatment equipment according to the present invention. When individually quenching workpieces, even if the cleaning fluids are mixed with different quenching oils, a single distiller can always properly separate only the cleaning fluids from these quenching oils. it can.

FIG. 1 is a schematic plan view showing an example of a work quenching treatment facility to which a cleaning facility in the work quenching treatment facility and a cleaning liquid regenerating method for the work quenching treatment facility according to the present invention can be applied. It is a block diagram which shows suitable one Embodiment of the washing | cleaning equipment in the work hardening processing equipment and the cleaning liquid reproduction | regeneration method of a work hardening processing equipment which concern on this invention. It is a Cox diagram which shows an example of the correlation of vapor pressure and vapor pressure of cleaning liquid and quenching oil. It is explanatory drawing for demonstrating the subject which this invention tends to solve.

BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment of a cleaning equipment in a work quenching treatment equipment and a method of regenerating a cleaning liquid in a work quenching treatment equipment according to the present invention will be described in detail below with reference to the accompanying drawings. First, a work quenching treatment facility according to the present embodiment and a cleaning liquid regenerator of a cleaning facility provided therein will be described.

In the cleaning equipment in the work quenching treatment equipment and the method for regenerating the cleaning liquid in the work quenching treatment equipment according to the present embodiment, when the internal pressure of the distiller 13 is reduced by the suction pump 16, the pressure adjustment valve 18 is used. The internal pressure of the distiller 13 is slightly changed depending on the vapor pressures Vc and Vh of the cold oil or the hot oil mixed in the mixed liquid M, which are introduced into the distiller 13 by batch processing. By adjusting and maintaining the first pressure or the second pressure higher than the above, vaporization can be performed at a pressure as low as possible than the vapor pressure Vw of the cleaning liquid C. Therefore, in any case of quenching oil, only the cleaning liquid C can be quickly and surely secured. It can be vaporized and separated from the quenching oil, and the single distiller 13 can always properly collect and reuse the cleaning liquid C.

Next, a modified example of the cleaning equipment in the work quenching treatment equipment and the method for regenerating the cleaning liquid of the work quenching treatment equipment according to the above embodiment will be described. As shown in FIG. 3, the cleaning liquid and various quenching oils have not only a difference in vapor pressure at any given temperature but also a difference in vaporization temperature at any given vapor pressure. It is well known that (vaporization temperature of cleaning liquid C: Tw, vaporization temperature of cold oil: Tc, vaporization temperature of hot oil: Th).

The apparatus for regenerating the cleaning liquid of the cleaning equipment in the work quenching treatment equipment according to the above-described embodiment may be equipped with the existing work quenching treatment equipment to modify the equipment.

According to the present invention, when a plurality of different types of quenching oils (cooling oils) are individually used for quenching a work, even if the cleaning liquid is mixed with different quenching oils, a single distiller can be used. always relates to cleaning equipment and reproducing method of the cleaning liquid in the work hardening treatment facility capable of only a properly separated washing liquid from these quenching oil.

The present invention has been devised in view of the above-mentioned conventional problems, and in the case where a plurality of different types of quenching oils (cooling oils) are individually used to quench a workpiece, quenching with different cleaning liquids is performed. It is an object of the present invention to provide a cleaning equipment for a work quenching treatment facility and a method for regenerating the cleaning fluid, which is capable of appropriately separating only the cleaning fluid from these quenching oils with a single distiller even when mixed with oil. To aim.

The cleaning liquid regenerating method according to the present invention is used in the work quenching treatment facility, and the cleaning liquid can be reused from a mixed liquid in which the quenching oil obtained by quenching the work is mixed with the cleaning liquid for cleaning the work. A method of regenerating a cleaning liquid for separating into a plurality of different types of the above quenching oils having different vapor pressures, wherein any one of the quenching oils obtained by quenching a work is mixed with the above washing liquid. From the liquid, the procedure in which only the cleaning liquid is vaporized under a pressure lower than the vapor pressure of the cleaning liquid and higher than the vapor pressure of the quenching oil, and then the vaporized cleaning liquid is liquefied It is characterized in that it is carried out in a batch process for each of the mixed liquids in which the oil is mixed with the cleaning liquid.

The cleaning liquid regenerating method according to the present invention is used in the work quenching treatment facility, and the cleaning liquid can be reused from a mixed liquid in which the quenching oil obtained by quenching the work is mixed with the cleaning liquid for cleaning the work. A method of regenerating a cleaning liquid for separation into a plurality of different types of the above-mentioned quenching oils having different vaporization temperatures, wherein any one of the quenching oils obtained by quenching a work is mixed with the washing liquid. From the liquid, only the cleaning liquid is vaporized at a temperature higher than the vaporization temperature of the cleaning liquid and lower than the vaporization temperature of the quenching oil, and then the vaporized gas of the cleaning liquid is liquefied. The quenching oil is batch-processed for each of the mixed liquids mixed with the cleaning liquid .

In the cleaning equipment and the cleaning liquid regenerating method in the workpiece quenching processing equipment according to the present invention, the cleaning liquid is used when quenching a work by individually using a plurality of different types of quenching oils (cooling oils). However, a single distiller can always properly separate only the cleaning liquid from these quenching oils, even if they are mixed with different quenching oils.

It is a schematic plan view showing an example of the work quenching treatment equipment to which the cleaning equipment and the cleaning liquid regenerating method in the work quenching treatment equipment according to the present invention can be applied. FIG. 1 is a configuration diagram showing a preferred embodiment of a cleaning equipment and a cleaning liquid regenerating method in a work quenching processing equipment according to the present invention. It is a Cox diagram which shows an example of the correlation of vapor pressure and vapor pressure of cleaning liquid and quenching oil. It is explanatory drawing for demonstrating the subject which this invention tends to solve.

BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment of a cleaning equipment and a cleaning liquid regenerating method in a work quenching treatment equipment according to the present invention will be described in detail below with reference to the accompanying drawings. First, a work quenching treatment facility according to the present embodiment and a cleaning liquid regenerator of a cleaning facility provided therein will be described.

In the cleaning equipment and the method of regenerating the cleaning liquid in the work quenching treatment equipment according to the present embodiment, when the internal pressure of the distiller 13 is reduced by the suction pump 16, the distiller 13 of the distiller 13 is controlled by the pressure regulating valve 18. The first or second internal pressure slightly exceeds the vapor pressure Vc, Vh of the cold oil or hot oil mixed in the mixed liquid M, which is introduced into the distiller 13 in a batch process, slightly exceeding the vapor pressure. By adjusting and maintaining the pressure, it is possible to vaporize the cleaning liquid C at a pressure as low as possible, lower than the vapor pressure Vw of the cleaning liquid C. Therefore, no matter what quenching oil is used, only the cleaning liquid C is vaporized quickly and surely. Therefore, the cleaning liquid C can always be properly collected and reused by the single distiller 13 at all times.

Next, a modified example of the cleaning equipment and the method of regenerating the cleaning liquid in the work quenching treatment equipment according to the above-described embodiment will be described. As shown in FIG. 3, the cleaning liquid and various quenching oils have not only a difference in vapor pressure at any given temperature but also a difference in vaporization temperature at any given vapor pressure. It is well known that (vaporization temperature of cleaning liquid C: Tw, vaporization temperature of cold oil: Tc, vaporization temperature of hot oil: Th).

The cleaning equipment in the work quenching treatment equipment according to the above-mentioned embodiment may be equipped with the existing work quenching treatment equipment to modify the equipment.

Claims (7)

A cleaning liquid regenerating device for reusably separating the cleaning liquid from a mixed liquid in which the quenching oil obtained by quenching the workpiece is mixed with the cleaning liquid for cleaning the workpiece,
Among a plurality of different types of quenching oils having different vapor pressures, an airtight distiller into which the mixed solution in which any one of the quenching oils obtained by quenching a work is mixed with the cleaning solution is introduced,
A suction pump for sucking gas from the distiller to reduce the internal pressure of the distiller;
Inside the distiller, which is provided between the suction pump and the distiller, and vaporizes only the cleaning liquid in accordance with the vapor pressure of the quenching oil in the mixed liquid introduced into the distiller. A pressure adjusting valve for adjusting the pressure to a pressure lower than the vapor pressure of the cleaning liquid and higher than the vapor pressure of the quenching oil,
A cleaning liquid regenerating apparatus, comprising: a liquefaction unit that is provided between the pressure regulating valve and the distiller and liquefies the vaporized cleaning liquid.   The cleaning liquid regenerating apparatus according to claim 1, wherein the pressure adjusting valve adjusts an internal pressure of the distiller to a pressure value slightly higher than a vapor pressure of the quenching oil in the mixed liquid. .   The work piece is provided with a detector that detects the type of the quenching oil that has been subjected to quenching processing and outputs a detection signal, and the pressure regulating valve, in accordance with the detection signal input from the detector, of the distiller. The cleaning liquid regenerator according to claim 1 or 2, which is operated to adjust an internal pressure. A method of regenerating a cleaning liquid for reusably separating the cleaning liquid from a mixed liquid in which a quenching oil obtained by quenching a work is mixed with a cleaning liquid for cleaning the workpiece,
Of a plurality of different types of quenching oils having different vapor pressures, any one of the quenching oils obtained by quenching a workpiece is mixed with the cleaning solution, and the mixture has a lower vapor pressure than the cleaning solution. The procedure in which only the cleaning liquid is vaporized under a pressure higher than the vapor pressure of the quenching oil, and then the vaporized cleaning liquid is liquefied is described in the following procedure, in which the different quenching oils are mixed with the cleaning liquid. In addition, a method for regenerating a cleaning liquid, which is characterized in that it is executed in a batch process. A cleaning liquid regenerating device for reusably separating the cleaning liquid from a mixed liquid in which the quenching oil obtained by quenching the workpiece is mixed with the cleaning liquid for cleaning the workpiece,
Of a plurality of different types of quenching oils having different vaporization temperatures, any one of the quenching oils obtained by quenching a work is introduced into the cleaning solution, and the gas-tight distiller into which the mixed solution is introduced,
A suction pump for sucking gas from the distiller,
According to the vaporization temperature of the quenching oil in the mixed liquid introduced into the distiller, the internal temperature of the distiller is set to the vaporization temperature of the washing liquid in order to vaporize only the washing liquid. Temperature control means for controlling the temperature higher than the temperature and lower than the vaporization temperature of the quenching oil,
A cleaning liquid regenerating apparatus, comprising: a liquefaction unit that is provided between the distiller and the suction pump and liquefies the vaporized cleaning liquid. A method of regenerating a cleaning liquid for reusably separating the cleaning liquid from a mixed liquid in which a quenching oil obtained by quenching a work is mixed with a cleaning liquid for cleaning the workpiece,
Among a plurality of different types of the quenching oils having different vaporization temperatures, any one of the quenching oils obtained by quenching a work is mixed with the cleaning liquid, and is higher than the vaporization temperature of the cleaning liquid. The procedure of vaporizing only the cleaning liquid below the vaporization temperature of the quenching oil, and then liquefying the gas of the vaporized cleaning liquid is the mixing of the quenching oil of different types mixed with the cleaning liquid. A method for regenerating a cleaning liquid, which is characterized in that each liquid is executed in a batch process.   A method for modifying work quenching treatment equipment, comprising: modifying the treatment equipment by equipping an existing work quenching treatment equipment with the cleaning liquid regenerator according to claim 1 or 5.

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