JP6209343B2 - Quenching treatment equipment, heat treatment equipment and quenching treatment method - Google Patents

Description

  The present invention relates to a quenching processing facility for performing a quenching process on a workpiece such as an automotive part. Furthermore, the present invention relates to a heat treatment facility for performing carburization, carbonitriding, etc., and a quenching method using the quenching facility.

  In general, in the manufacture of workpieces such as automobile parts, a quenching process for rapidly cooling a heated workpiece is known as a method for surface hardening the workpiece. Quenching treatment includes, for example, a method in which a workpiece is immersed in a bath of water or oil, spray quenching by spraying a liquid, gas quenching by gas injection, etc., but a large amount of workpieces that are metal parts In the case of quenching, a technique in which a work is immersed in an oil bath is most preferably used.

  For example, Patent Document 1 discloses a technique in which a workpiece holder that holds a workpiece is moved up and down in a vertical direction with respect to a cooling fluid tank that stores the cooling fluid, and the workpiece is immersed in the cooling fluid. Patent Document 2 discloses a technique for immersing a work through a basket in a quenching tank storing a coolant. Patent Document 3 discloses a technique in which the oil cooling chamber is evacuated and the oil mist is removed while the work is stationary in the upper portion of the cooling tank (oil tank) in the oil cooling chamber.

JP 2012-62512 A JP 2010-53406 A JP-A-4-263008

  In the conventional quenching process such as the technique described in Patent Document 1 described above, the workpiece put into the cooling tank storing the coolant (that is, oil) is compared with the workpiece pulled up from the coolant in the workpiece lifting area. Then, by blowing the gas, a method of blowing off and removing the coolant attached to the workpiece, the workpiece holder, the basket holding the workpiece, or the like is employed. Moreover, in the technique described in the above-mentioned Patent Document 3, the work is stopped at the upper part of the cooling tank to perform oil draining.

Here, when the workpiece is put into the cooling tank from above in the vertical direction, particularly when a depression or the like is formed on the upper surface of the workpiece or when the workpiece has a generally bowl shape or the like opening upward, After being immersed in the liquid, when the work is taken out from the cooling tank, the oil that is the cooling liquid is transported out of the processing equipment while remaining in the depression formed in the work or in the substantially bowl-shaped work. That is, a large amount of oil remaining in the workpiece and in the workpiece is taken out of the processing facility. FIGS. 1A and 1B show an example of a workpiece in which a depression 2 is formed on the upper surface.

  On the other hand, the quenching process using the cooling tank and the cooling liquid is generally performed in a non-oxidizing atmosphere such as an inert gas or a metamorphic gas with a structure in which outside air does not flow into the processing equipment. The atmosphere outside the facility is atmospheric. Therefore, as described above, the oil taken out of the processing equipment while remaining on the work is oxidized in the air atmosphere and cannot be reused as the coolant again, and is discarded as waste oil.

  Therefore, in the techniques described in Patent Documents 1 and 2 above, the oil that remains on the workpiece and is taken out of the processing equipment cannot be reused, and a large amount of oil is used to replenish the coolant in the quenching process. Since it becomes necessary, there is a problem that the cost of the cooling liquid increases. If the work has a depression or the like, or if the work has a substantially bowl shape, a larger amount of oil remains on the work and is taken out of the processing equipment, so the loss is significant.

  Moreover, in the conventional hardening equipment represented by the said patent documents 1-3, although the washing | cleaning process for dropping oil is performed by the washing | cleaning process process with respect to the workpiece | work conveyed outside the equipment after hardening process, When the oil is taken out of the processing facility, a large amount of cleaning liquid is required for the cleaning process, and there is a problem that the replacement frequency of the cleaning liquid increases, the cleaning efficiency decreases, and the cleaning cost increases.

  Accordingly, an object of the present invention is to provide a quenching treatment facility with high utilization efficiency of the coolant by reducing the amount of the coolant adhering to the workpiece taken out of the treatment facility in the quenching process.

In order to solve the above-described problems, according to the present invention, a quenching treatment facility for performing a quenching process by immersing a workpiece after heat treatment in a coolant, and an oil tank chamber provided therein with a cooling tank for storing the coolant A holding body for holding the workpiece, a tilting mechanism for tilting the workpiece in the quenching processing facility, and means for preventing outside air from flowing into the quenching processing facility , wherein the tilting mechanism includes the workpiece Alternatively, a support member that supports the holding body and an elevating mechanism that elevates and lowers the support member are provided, and a plurality of the support members are provided, and the tilt mechanism includes an elevating mechanism that elevates and lowers all or part of the plurality of support members. A quenching treatment facility is provided.

Further, according to the present invention, there is provided a quenching treatment facility for performing a quenching process by immersing the heat-treated work in a coolant, an oil tank chamber having a cooling tank for storing the coolant therein, and the work There is provided a quenching processing facility comprising a tilting mechanism for tilting in the quenching processing facility and means for preventing outside air from flowing into the quenching processing facility, and the tilting mechanism includes a rotating mechanism for rotating the workpiece. The

The tilt mechanism may tilt the holding body and the workpiece integrally.

  An oil draining chamber adjacent to the oil tank chamber may be provided. The tilt mechanism may be provided in the oil tank chamber or the oil drain chamber.

  You may provide the collection | recovery mechanism which collect | recovers the cooling fluid which falls when the said workpiece | work is inclined. The oil drain chamber may include a recovery mechanism for recovering the coolant and a reflux mechanism for returning the coolant recovered by the recovery mechanism to the cooling tank. The oil tank chamber or the oil drain chamber may be provided with an injection mechanism for blowing a non-oxidizing gas to the workpiece.

  Moreover, according to this invention from another viewpoint, the heat processing equipment provided with the heat processing furnace which performs a carburizing process to a workpiece | work, and the hardening processing equipment of the said description is provided.

  According to another aspect of the present invention, there is provided a quenching treatment method in which the quenching treatment facility performs the quenching treatment, and the workpiece is cooled in a non-oxidizing atmosphere in which outside air does not flow into the quenching treatment facility. A quenching treatment method is provided in which the workpiece is immersed in a cooling liquid stored in a bath and quenched, and the workpiece is taken out of the cooling bath, and then the workpiece is tilted in the quenching treatment facility by the tilt mechanism.

  ADVANTAGE OF THE INVENTION According to this invention, the quenching processing equipment with high utilization efficiency of a cooling fluid is provided by reducing the quantity taken out of the processing equipment of the cooling fluid adhering to the workpiece | work in quenching processing.

It is a schematic perspective view which shows an example of the workpiece | work in which the hollow is formed in the upper surface. It is a schematic longitudinal cross-sectional view of the heat processing equipment which concerns on the 1st Embodiment of this invention. It is the schematic sectional drawing which looked at the oil tank room from the side. It is explanatory drawing about the heat processing of the workpiece | work in an oil tank chamber. It is the schematic sectional drawing which looked at the hardening processing equipment which concerns on the 2nd Embodiment of this invention from the side. It is a general | schematic enlarged view of a mount frame, (a) has shown the state which is not inclined, (b) has shown the state inclined. It is explanatory drawing about the structure of the oil drain chamber which concerns on the 3rd Embodiment of this invention. It is a schematic sectional drawing of a rotation mechanism. It is explanatory drawing about the structure of the oil drain chamber which concerns on the modification of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present specification and drawings, components having substantially the same functional configuration are denoted by the same reference numerals, and redundant description is omitted. In the following, since the heat treatment furnace 3 provided in the heat treatment equipment 1 is a conventional continuous carburizing equipment that has been conventionally known, its structure is only briefly described and is a characteristic part of the present invention. The quenching equipment will be described in detail.

(First embodiment)
FIG. 2 is a schematic longitudinal sectional view of the heat treatment equipment 1 according to the first embodiment of the present invention, and specifically shows the structure of a continuous carburizing and quenching equipment. As shown in FIG. 2, the heat treatment facility 1 includes, for example, a heat treatment furnace 3 that processes the workpiece W in a high temperature state while conveying the workpiece W such as an automobile part in the conveyance direction D along the X direction (substantially horizontal direction), A quenching treatment equipment 4 for performing oil cooling (oil quenching treatment) of the workpiece W is provided. The heat treatment furnace 3 is a treatment furnace that performs gas carburization including, for example, preheat treatment, carburization treatment, diffusion treatment, and temperature lowering treatment.

  In the furnace body 10 of the heat treatment furnace 3, as a plurality of treatment chambers, a preheating chamber 11 that performs preheat treatment (heating treatment) of the workpiece W, a carburization chamber 12 that performs carburization treatment and diffusion treatment (carburization diffusion chamber), diffusion A descending greenhouse 13 for performing a temperature lowering process after the processing is provided in order from the upstream side in the transport direction D. On the entrance side of the furnace body 10, there is provided a carry-in entrance 21 having an openable / closable door 22 for carrying the work W into the furnace body 10 (preheating chamber 11) from the outside of the quenching treatment equipment 1. On the outlet side, a loading / unloading port 25 having an openable / closable door 26 for unloading the workpiece W from the furnace body 10 (falling greenhouse 13) and loading it into the oil tank chamber 50 is provided.

  Inside the furnace body 10, partition walls 31 and 32 are provided between the preheating chamber 11 and the carburizing chamber 12 and between the carburizing chamber 12 and the descending chamber 13, respectively. That is, the inside of the furnace body 10 includes three processing chambers by the two partition walls 31 and 32. Each partition wall 31 and 32 has a passage opening through which the work passes in the X direction, and each passage opening is provided with a partition door 37 and 38 that can be opened and closed. That is, the atmosphere of each processing chamber of the preheating chamber 11, the carburizing chamber 12, and the descending greenhouse 13 can be partitioned by the partition doors 37 and 38.

  The workpiece W in the present embodiment does not necessarily indicate one steel material part or the like, but the work W may be a unit such as a tray or basket containing a plurality of steel material parts.

  Further, as shown in FIG. 2, the heat treatment furnace 3 is provided with a roller conveyor 40 as a transport mechanism for transporting the workpiece W. The roller conveyor 40 has a configuration in which a plurality of rollers are arranged side by side in the X direction in the lower part of the furnace body 10, and transports the work W placed on the upper surface of each roller. Further, the preheating chamber 11, the carburizing chamber 12, and the descending greenhouse 13 are provided with a stirring mechanism 42 such as a fan for stirring the atmosphere inside each, and a heater (not shown) for adjusting the internal temperature.

  Although not shown, the heat treatment furnace 3 is supplied with an enriched gas, a modified gas, air, and nitrogen from the outside to each processing chamber (preheating chamber 11, carburizing chamber 12, and descending chamber 13) according to the processing to be performed. A supply path is provided, and an exhaust path for exhausting the supplied gas is also provided.

A quenching treatment facility 4 is provided on the downstream side of the heat treatment furnace 3, and an oil tank chamber 50 is disposed in the quenching treatment facility 4. The oil tank chamber 50 is a facility that cools and quenches the workpiece W that has been heat-treated in the heat treatment furnace 3, and is configured to cool the workpiece W by immersing the workpiece W in a coolant A that is, for example, oil. The cooled workpiece | work W is carried out from the opening-and-closing type exit port 51 provided in the downstream of the oil tank chamber 50, and is moved to the equipment which performs post-processes, such as washing | cleaning, for example. Below, the structure of the oil tank chamber 50 is demonstrated with reference to FIG.

  FIG. 3 is a schematic cross-sectional view of the oil tank chamber 50 provided in the quenching treatment facility 4 according to the first embodiment of the present invention as viewed from the side. As shown in FIG. 3, a cooling tank 52 in which the coolant A is stored is provided below the oil tank chamber 50. In addition, a holding body 55 that holds the work W is provided above the cooling tank 52 inside the oil tank chamber 50, and the work W carried into the oil tank chamber 50 is held by the holding body 55. The interior of the oil tank chamber 50 is brought into a non-oxidizing atmosphere by supplying a gas such as an inert gas or a modified gas from a gas supply path (not shown) during the quenching process. Examples of the holding body 55 include a frame on which the workpiece W is placed, a basket for storing the workpiece W, and the like.

  The holding body 55 is suspended from the ceiling 50 a of the oil tank chamber 50 via a plurality of support members 58. In the present embodiment, it is assumed that there are two support members 58, and the holding body 55 will be described as a configuration in which both left and right ends in the figure are suspended by support members 58a and 58b, respectively.

  Further, the support members 58a and 58b are respectively attached with an elevating mechanism 60 (shown as a left elevating mechanism 60a and a right elevating mechanism 60b in the figure), and the support members 58a and 58b elevate in the vertical direction independently of each other. It is configured to be freely controlled. In other words, the support member 58 and the lifting mechanism 60 constitute a tilt mechanism that tilts the workpiece W as described below. Examples of the lifting mechanism 60 include a chain mechanism such as a cylinder, a motor, a gear, or a zip chain lifter (registered trademark: Enomoto Chain Co., Ltd.) that is operated by pneumatic pressure, hydraulic pressure, or electricity.

  Below, the heat processing of the workpiece | work W in the oil tank chamber 50 of the structure shown in FIG. 3 is demonstrated with reference to Fig.4 (a)-(e). FIGS. 4A to 4E are explanatory diagrams of the work W quenching process in the oil tank chamber 50. FIG. First, as shown in FIG. 4A, the workpiece W that has been heat-treated in the heat treatment furnace 3 is carried into the oil tank chamber 50 and held by the holding body 55. At this time, the holding body 55 is located above the liquid level of the cooling tank 52 inside the oil tank chamber 50, and cooling is not yet started. Here, after loading the workpiece W, the loading / unloading port 25 (see FIG. 1) between the oil tank chamber 50 and the heat treatment furnace 3 and the loading / unloading port 51 are closed, and the outside air does not flow in or the pressure inside the facility is higher than the outside air. Thus, the internal space of the oil tank chamber 50 is in an atmosphere cut off from the outside air. For example, by supplying a denatured gas or an inert gas, a non-oxidizing gas atmosphere such as a reducing atmosphere or an inert atmosphere is provided.

  Next, as shown in FIG. 4B, the lifting mechanisms 60a and 60b are controlled with the work W held by the holding body 55, and the left and right ends of the holding body 55 are moved via the support members 58a and 58b. Lower by the same distance (with the same stroke). The distance to be lowered at this time is such a distance that the workpiece W held by the holding body 55 is sufficiently immersed in the coolant A stored in the cooling tank 52. In this way, as shown in FIG. 4C, the workpiece W is immersed in the coolant A in the cooling tank 52, and the workpiece W is immersed for a predetermined time, thereby quenching (specifically, rapid cooling). ) Is performed.

  Subsequently, after the quenching process is completed, the holding body 55 is pulled up from the cooling tank 52 by controlling the elevating mechanisms 60a and 60b as shown in FIG. When pulling up the holding body 55, the left and right ends of the holding body 55 are raised by the same distance (with the same stroke) as in the case of lowering. At this time, the workpiece W held by the holding body 55 is immediately after being immersed in the cooling bath 52 and subjected to heat treatment, and is in a state where the coolant A is adhered. In particular, when a recess is formed on the upper surface of the workpiece W as shown in FIG. 1, the coolant A is pulled up with the coolant A remaining in the recess.

  Next, each of the elevating mechanisms 60a and 60b is independently controlled, and as shown in FIG. 4E, one of the left and right ends of the holding body 55 is raised through the support members 58a and 58b, and the other is moved. By lowering, the holding body 55 is inclined by a predetermined angle. Accordingly, the workpiece W is also tilted in conjunction with the holding body 55, and the workpiece W is drained. In particular, the coolant A remaining in the recess formed in the workpiece W efficiently falls below the oil tank chamber 50. In the present embodiment, it is described that one of the left and right end portions of the holding body 55 is raised and the other is lowered to tilt the holding body 55, but the tilting method is limited to this. It is not a thing. For example, a method of raising or lowering only one of the left and right end portions of the holding body 55 may be employed.

  As shown in FIG. 4 (e), the work W is drained by inclining the holding body 55, and the coolant A falls from the work W. In the oil tank chamber 50, since the holding body 55 is positioned vertically above the cooling tank 52, the cooling liquid A dropped from the work W returns to the cooling tank 52, and the cooling liquid A used for the heat treatment is efficient. To be recovered.

  And the workpiece | work W in which the quenching process was completed is carried out of the oil tank chamber 50 in order to wash | clean and remove the cooling fluid A adhering to the workpiece | work W at the next washing | cleaning process. The cleaning process is performed, for example, by spraying the cleaning liquid onto the workpiece W in the cleaning chamber.

  In the oil tank chamber 50 configured as described above with reference to FIG. 3, the coolant A is collected by a process as shown in FIG. 4, and is taken out of the oil tank chamber 50 while remaining attached to the workpiece W. The amount of the coolant A that is lost can be reduced, and the coolant A can be recovered and reused, so that the utilization efficiency of the coolant A can be increased. Further, since the amount of the additional coolant A necessary for the heat treatment is reduced, the cost can be reduced.

  In addition, as described above, in the subsequent stage of the quenching process, the workpiece W is cleaned using the cleaning solution after the heat treatment. However, as the amount of the cooling liquid A adhering to or remaining on the workpiece W increases, Since the cleaning time increases, the amount of the cooling liquid A adhering to and remaining on the workpiece W can be reduced, so that the amount of the cleaning liquid used in the cleaning process can be reduced and the cleaning time can be shortened to increase the cleaning efficiency. It becomes possible.

  As mentioned above, although the example of the 1st Embodiment of this invention was demonstrated, this invention is not limited to the form of illustration. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the idea described in the claims, and these naturally belong to the technical scope of the present invention. It is understood. Therefore, another embodiment of the present invention will be described below with reference to the drawings.

(Second Embodiment)
In the oil tank chamber 50 according to the first embodiment, the holding body 55 is inclined inside the oil tank chamber 50, and support members 58a and 58b and elevating mechanisms 60a and 60b are installed as mechanisms for inclining. However, the present invention is not limited to this. Therefore, in the second embodiment, a configuration in which an oil draining chamber 70 adjacent to the oil tank chamber 50 is provided will be described with reference to FIG. In the present embodiment, components having the same functional configuration as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  FIG. 5 is a schematic cross-sectional view of the heat treatment facility 1 according to the second embodiment of the present invention as seen from the side. As shown in FIG. 5, the heat treatment equipment 1 according to the present embodiment is provided with a heat treatment furnace 3 that performs heat treatment of the workpiece W in order from the upstream side, an oil tank chamber 50, and an oil draining chamber 70. The heat treatment furnace 3 and the oil tank chamber 50 are adjacent to each other, and the oil tank chamber 50 and the oil drain chamber 70 are adjacent to each other. That is, the quenching treatment facility 4 is configured by the oil tank chamber 50 and the oil drain chamber 70. The interior of the oil drain chamber 70 is configured such that outside air does not flow in during the quenching process, as in the oil tank chamber 50, and is, for example, in a modified gas atmosphere or an inert gas atmosphere.

  In the oil drain chamber 70, a pedestal 72 is installed as a holding body for holding the workpiece W, and the pedestal 72 is provided with an elevating mechanism 73. The elevating mechanism 73 is installed at one end of the gantry 72, and the gantry 72 can be inclined at a predetermined angle by operating the elevating mechanism 73. 6A and 6B are schematic enlarged views of the gantry 72, in which FIG. 6A shows a state where the pedestal 72 is not inclined, and FIG. The elevating mechanism 73 is the same as the elevating mechanisms 60a and 60b in the first embodiment, for example, a cylinder, a motor, a gear, or a zip chain lifter (registered trademark: Enomoto Co., Ltd.) that operates pneumatically, hydraulically, or electrically. A chain mechanism such as chain) is preferred. Further, in the present embodiment, the case where one lifting mechanism 73 is provided is illustrated, but at least one lifting mechanism 73 may be provided, and a plurality of lifting mechanisms 73 may be provided.

  As shown in FIG. 5, the oil drain chamber 70 is provided with a recovery mechanism 75 for recovering the coolant A below the gantry 72. In other words, when the gantry 72 is tilted while the work W after the heat treatment is held on the gantry 72, the cooling liquid A adhering to and remaining on the work W falls and is collected in the collecting mechanism 75. The recovery mechanism 75 is provided with a reflux mechanism 78 that sends the recovered coolant A to the cooling tank 52 in the adjacent oil tank chamber 50, and the coolant A recovered by the recovery mechanism 75 is appropriately cooled by the cooling tank 52. To reflux. In addition, the workpiece W after the quenching process is appropriately carried out of the quenching processing facility 4 by opening and closing a carry-out port 56 provided on the side surface of the oil draining chamber 70.

  According to the heat treatment facility 1 having the configuration according to the second embodiment described with reference to FIGS. 5 and 6, the work W after the quenching process is placed on the gantry 72 of the oil draining chamber 70, and the gantry 72 is By inclining, the coolant A adhering to and remaining on the workpiece W can be dropped and recovered in the recovery mechanism 75. The recovered coolant A is returned to the cooling tank 52 by the reflux mechanism 78 and used again for cooling the workpiece W. The oil drain chamber 70 is an atmosphere that is shielded from the outside air at least during the quenching process, like the oil tank chamber 50, and the recovered coolant A is not exposed to the air atmosphere, so that the cooling efficiency and the like are deteriorated. It can be reused without letting it happen. Accordingly, it is possible to reduce the amount of the cooling liquid A that is taken out of the processing apparatus while adhering to and remaining on the workpiece W, and the amount of the cooling liquid A that can be reused is increased compared to the conventional case. The utilization efficiency can be increased. Further, it is possible to reduce the amount of the cleaning liquid used in the subsequent cleaning and shorten the cleaning time, and it is possible to increase the cleaning efficiency.

  In the present embodiment, the structure in which the gantry 72, the lifting mechanism 73, and the recovery mechanism 75 are provided in the oil drain chamber 70 has been described. However, the present invention is not limited to this, and such a structure is not limited to the oil tank chamber 50. It is also possible to apply to.

(Third embodiment)
In the second embodiment, the gantry 72 is provided in the oil draining chamber 70, and the gantry 72 is inclined to collect the coolant A adhering to and remaining on the workpiece W. However, the method of recovering the coolant A is not limited to this. FIG. 7 is an explanatory view (side cross-sectional view) of the configuration of the oil draining chamber 70 provided in the quenching processing facility according to the third embodiment of the present invention. In addition, the same code | symbol is attached | subjected about the component which has the function structure similar to the oil draining chamber in the said 2nd Embodiment, and the description is abbreviate | omitted.

  As shown in FIG. 7, a rotation mechanism 80 having a horizontal rotation shaft capable of rotating the workpiece W placed thereon is installed on the upper surface of the gantry 72 in the oil drain chamber 70. The rotating mechanism 80 includes a substantially cylindrical holding body 81 on which the work W is placed, and a rotational power source 82 that also serves as a support member that drives the holding body 81 to rotate. For example, a chain is attached to the peripheral surface (side surface) of the holding body 81, and examples of the rotational power source 82 include a sprocket and a motor. FIG. 8 is a schematic sectional view (front sectional view) of the rotating mechanism 80. As shown in FIG. 8, one or a plurality of rotational power sources 82 are installed and arranged so as to contact the side surface of the holding body 81.

  In the rotation mechanism 80 shown in FIGS. 7 and 8, the workpiece W is placed on the holding body 81, and the holding body 81 is rotated by the operation of the rotational power source 82. It is configured to rotate. That is, the rotation mechanism 80 is installed as an inclination mechanism for inclining the workpiece W. Specifically, the holding body 81 rotates by rotating the sprocket with a motor and transmitting the rotation to the holding body 81 via a chain.

In the present embodiment, the work W on which the cooling liquid A adheres and remains is placed on the holding body 81 and rotated, so that the cooling liquid A scatters from the work W, falls in the oil drain chamber 70, and is recovered. 75 is recovered. According to such a method, in particular, when a recess is formed on the upper surface of the workpiece W and the coolant A is accumulated in the recess, the coolant A can be efficiently scattered and collected. Thereafter, the workpiece W is carried out of the quenching processing facility 4 from the carry-out port 56 of the oil removing chamber 70.

In the present embodiment, the rotation mechanism 80 is described as being provided in the oil drain chamber 70, but the present invention is not limited to this, and such a configuration is applied to the oil tank chamber 50. It is also possible.

  Furthermore, as a method for recovering the coolant A in the oil drain chamber 70, an inert gas or the like may be sprayed on the work W as a non-oxidizing gas. Therefore, hereinafter, a configuration in which an inert gas is blown onto the workpiece W in the oil drain chamber 70 will be described. FIG. 9 is an explanatory view of a configuration of an oil draining chamber 70 provided with an injection mechanism 90 described below. In addition, in FIG. 9, the same code | symbol is attached | subjected about the component which has the same function structure as the oil draining chamber of FIGS. 5-8 used for description of the said 2nd or 3rd embodiment, Description is omitted.

  As shown in FIG. 9, a plurality of injection mechanisms 90 are installed in the oil drain chamber 70 along the ceiling surface and the inner surface so as to surround the workpiece W placed on the gantry 72. The injection mechanism 90 is provided with a nozzle 91, and the injection direction of the nozzle 91 faces the workpiece W. Further, a supply pipe 92 for supplying an inert gas to the injection mechanism 90 is provided, and the inert gas supplied from a supply source (not shown) is injected toward the workpiece W by each injection mechanism 90. Yes.

  In the oil drain chamber 70 having the structure provided with the injection mechanism 90 shown in FIG. 9, the inert gas is injected from the injection mechanism 90 onto the surface of the work W on which the coolant A has adhered and remained, and the The remaining coolant A can be blown off in the oil drain chamber 70 and scattered. Thereby, the coolant A adhering to and remaining on the surface of the workpiece W can be efficiently removed and recovered by the recovery mechanism 75.

  In addition, it is preferable to use together the structure provided with the injection mechanism 90 demonstrated above with the apparatus structure which concerns on the 1st-3rd embodiment of this invention. That is, by using this configuration in combination with the configurations according to the first to third embodiments, it becomes possible to more efficiently perform the removal and recovery of the cooling liquid A adhering to and remaining on the workpiece W. .

  The present invention relates to a quenching processing facility for performing a quenching process on a workpiece such as an automotive part. Furthermore, the present invention can be applied to heat treatment equipment and quenching treatment methods for performing carburization, carbonitriding, and the like using the quenching equipment.

DESCRIPTION OF SYMBOLS 1 ... Heat treatment equipment 3 ... Heat treatment furnace 4 ... Quenching treatment equipment 10 ... Furnace body 11 ... Preheating room 12 ... Carburizing room 13 ... Alighting chamber 21 ... Carrying in port 25 ... Carrying in / out port 31, 32 ... Partition walls 35, 36 ... Passage 37 38 ... Partition door 40 ... Roller conveyor 50 ... Oil tank chamber 52 ... Cooling tank 55 ... Holding body 56 ... Carrying out port 58 (58a, 58b) ... Support member 60 (60a, 60b) ... Lifting mechanism 70 ... Oil drain chamber 71 ... Heat treatment furnace 72 ... Still 73 ... Elevating mechanism 75 ... Recovery mechanism 78 ... Reflux mechanism 80 ... Rotating mechanism 81 ... Holding body 82 ... Rotary power source 90 ... Injecting mechanism 91 ... Nozzle 92 ... Supply pipe D ... Conveying direction A ... Coolant W …work

Claims (11)

It is a quenching treatment facility that performs a quenching treatment by immersing the workpiece after the heat treatment in a coolant,
An oil tank chamber equipped with a cooling tank for storing the coolant, and
A holding body for holding the workpiece;
An inclination mechanism for inclining the workpiece in the quenching treatment facility;
Means for preventing outside air from flowing into the quenching treatment facility ,
The tilt mechanism includes a support member that supports the workpiece or the holding body, and a lifting mechanism that lifts and lowers the support member.
A plurality of the support members are provided,
The said inclination mechanism is a quenching processing equipment provided with the raising / lowering mechanism which raises / lowers all or one part of several support members . It is a quenching treatment facility that performs a quenching treatment by immersing the workpiece after the heat treatment in a coolant,
An oil tank chamber equipped with a cooling tank for storing the coolant, and
An inclination mechanism for inclining the workpiece in the quenching treatment facility;
Means for preventing outside air from flowing into the quenching treatment facility;
With
The tilting mechanism is a quenching processing facility provided with a rotating mechanism that rotates the workpiece. The quenching processing facility according to claim 1, wherein the tilt mechanism tilts the holding body and the workpiece integrally. The quenching processing facility according to claim 1, wherein the tilt mechanism includes a rotation mechanism that rotates the workpiece. The quenching treatment facility according to claim 1, wherein an oil draining chamber adjacent to the oil tank chamber is provided. The quenching processing facility according to claim 5, wherein the tilt mechanism is provided in the oil tank chamber or the oil drain chamber. The quenching processing equipment according to claim 5 or 6, comprising a recovery mechanism for recovering a coolant that drops when the workpiece is tilted. The oil drain chamber is a recovery mechanism for recovering the coolant,
A quenching treatment facility according to any one of claims 5 to 7, further comprising: a reflux mechanism that recirculates the coolant recovered by the recovery mechanism to the cooling tank. The quenching treatment facility according to any one of claims 5 to 8, wherein the oil tank chamber or the oil drain chamber is provided with an injection mechanism for blowing a non-oxidizing gas to the workpiece. A heat treatment furnace for carburizing the workpiece;
The heat processing equipment provided with the hardening processing equipment in any one of Claims 1-9. A quenching treatment method for quenching by the quenching treatment facility according to claim 1,
In a non-oxidizing atmosphere that does not allow outside air to flow into the quenching treatment facility,
The workpiece is immersed in the coolant stored in the cooling bath and quenched.
After removing the workpiece from the cooling tank,
A quenching method, wherein the workpiece is tilted in the quenching processing facility by the tilt mechanism.

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