EP2915888A1 - Installation de carburisation et de trempe - Google Patents

Installation de carburisation et de trempe Download PDF

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Publication number
EP2915888A1
EP2915888A1 EP15000648.4A EP15000648A EP2915888A1 EP 2915888 A1 EP2915888 A1 EP 2915888A1 EP 15000648 A EP15000648 A EP 15000648A EP 2915888 A1 EP2915888 A1 EP 2915888A1
Authority
EP
European Patent Office
Prior art keywords
treated
carburizing
turntable
treatment
transfer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP15000648.4A
Other languages
German (de)
English (en)
Other versions
EP2915888B1 (fr
Inventor
Hokuto HATANAKA
Yasuhiro Koyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dowa Thermotech Co Ltd
Original Assignee
Dowa Thermotech Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dowa Thermotech Co Ltd filed Critical Dowa Thermotech Co Ltd
Publication of EP2915888A1 publication Critical patent/EP2915888A1/fr
Application granted granted Critical
Publication of EP2915888B1 publication Critical patent/EP2915888B1/fr
Active legal-status Critical Current
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/773—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or vacuum
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/78—Combined heat-treatments not provided for above
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0006—Details, accessories not peculiar to any of the following furnaces
    • C21D9/0018—Details, accessories not peculiar to any of the following furnaces for charging, discharging or manipulation of charge
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0006—Details, accessories not peculiar to any of the following furnaces
    • C21D9/0025—Supports; Baskets; Containers; Covers
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/20—Carburising
    • C23C8/22—Carburising of ferrous surfaces
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/80—After-treatment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B17/00—Furnaces of a kind not covered by any preceding group
    • F27B17/0016—Chamber type furnaces

Definitions

  • the present invention relates to a carburizing and quenching facility in which a carburizing and quenching treatment of an object to be treated is performed.
  • a carburizing treatment bringing carbon into a surface layer of an object to be treated to be solid-dissolved.
  • a preheat treatment, a quenching treatment, and the like are also performed.
  • a series of treatments to be performed generally when performing the carburizing treatment of an object to be treated, including the above preheat treatment, quenching treatment, and the like is referred to as a "carburizing and quenching treatment.”
  • the present invention has been made in consideration of the above-described circumstances, and has an object to shorten the time taken for a carburizing and quenching treatment of an object to be treated.
  • the present invention to solve the above-described object is a carburizing and quenching facility that includes: a treatment chamber where at least one treatment related to a carburizing and quenching treatment is performed on an object to be treated; a transfer apparatus to transfer an object to be treated; a mounting table that is provided in the treatment chamber and on which an object to be treated transferred into the treatment chamber is mounted; and a lifting and lowering device to lift and lower the mounting table and in which a transfer arm to transfer an object to be treated into the treatment chamber and outside the treatment chamber is provided in the transfer apparatus and a carburizing and quenching treatment of an object to be treated is performed
  • the carburizing and quenching facility includes: a turntable that is disposed in the treatment chamber and performs deliveries of an object to be treated to and from the mounting table and the transfer arm; and a turntable drive device that rotates the turntable, in which the turntable includes: a first support part that supports an object to be treated that has already undergone a treatment; and a second support part that supports an
  • a lifting and lowering mechanism to lift and lower the turntable may also be provided in the turntable drive device.
  • the external shape of the turntable is a rectangular shape in plan view, and the first support part and the second support part may also be provided to sandwich the rotation axis of the turntable.
  • the first support part and the second support part may also be provided at point-symmetric positions about the rotation axis of the turntable as a symmetric point in plan view.
  • the object to be treated has a circular shape, and on at least one of the first support part and the second support part, at least three turntable support pins to support the object to be treated may also be provided.
  • On the transfer arm at least three transfer support pins to support the object to be treated may also be provided, and on the mounting table, at least three mounting table support pins to support the object to be treated may also be provided.
  • the object to be treated has a shape formed of a circular top surface part and a cylindrical side surface part, and on at least one of the first support part and the second support part, the turntable support pins may also be provided on the circumference having substantially the same diameter as the inside diameter of the side surface part of the object to be treated. Further, on the mounting table, the mounting table support pins may also be provided on the circumference having substantially the same diameter as the inside diameter of the side surface part of the object to be treated. Further, on the transfer arm, the transfer support pins may also be provided on the circumference having substantially the same diameter as the inside diameter of the side surface part of the object to be treated.
  • the present invention it is possible to perform transfer of an object to be treated from a treatment chamber and transfer of the following object to be treated into the treatment chamber simultaneously when a transfer port door is opened. This makes it possible to shorten the time taken for transfer-in/out of the objects to be treated. Further, it is possible to reduce the opening and closing frequency of the transfer port door, so that it is possible to suppress temperature decrease in the treatment chamber. This makes it possible to shorten the time taken until the temperature in the treatment chamber reaches an appropriate temperature, resulting in that the treatment time in the treatment chamber can be shortened.
  • the carburizing and quenching facility 1 includes a temperature increasing chamber 2, carburizing chambers 3 (a first carburizing chamber 3a, a second carburizing chamber 3b, and a third carburizing chamber 3c), and a quenching chamber 4, (which will be each sometimes called an "individual treatment chamber” hereinafter), and the individual treatment chambers are disposed in a line in order. Further, the carburizing and quenching facility 1 includes a transfer apparatus 5 that performs transfer of the object to be treated W into the individual treatment chamber and transfer of the object to be treated W from the individual treatment chamber.
  • the transfer apparatus 5 is constituted by a transfer part 6 provided with a transfer arm 40 that supports and moves the object to be treated and a transfer path 7 provided in parallel with the disposition line of the individual treatment chambers.
  • the transfer apparatus 5 has a constitution to move the transfer part 6 along the transfer path 7.
  • the transfer part 6 has a mechanism to extend the transfer arm 40 to the individual treatment chamber in the horizontal direction.
  • the object to be treated W on which a predetermined treatment has been performed in the single treatment chamber (for example, the temperature increasing chamber 2) is transferred to the treatment chamber positioned downstream from the above treatment chamber, (which is, for example, the first carburizing chamber 3a), sequentially, and a predetermined treatment is performed in each of the individual treatment chambers, and thereby a carburizing and quenching treatment of the object to be treated W is finished.
  • the carburizing treatment is performed in the first to third carburizing chambers 3a to 3c in order, and thereby a series of carburizing treatments is completed.
  • FIG. 2 is a schematic view illustrating the inside of the first carburizing chamber 3 a.
  • the transfer arm 40 in FIG. 2 is in a state of extending up to a predetermined position enabling deliveries of the object to be treated W to/from a later-described turntable 60.
  • the turntable 60 in FIG. 2 can deliver the object to be treated W to/from the transfer arm 40, and is in a state where its rotation is stopped at a position enabling deliveries of the object to be treated W to/from a later-described mounting table 30. That is, the turntable 60 in FIG. 2 is in a delivery posture enabling deliveries of the object to be treated W.
  • the first carburizing chamber 3a is constituted by two chambers of a delivery part 20 where delivery of the object to be treated W transferred by the transfer arm 40 is performed and a heat treatment part 21 adjacently provided on a top part of the delivery part 20.
  • a heat treatment part 21 adjacently provided on a top part of the delivery part 20.
  • an induction heating coil 22 to heat the object to be treated W is provided.
  • the partition door 27 is a drawn-type sliding door, and in each tip part of door main bodies 27a and 27b, a semicircular hole having substantially the same diameter as that of a lifting and lowering rod 24 of a lifting and lowering device 23, (which is not illustrated), is provided so that the partition door 27 can be closed even when the later-described mounting table 30 goes up.
  • the mounting table 30 on which the object to be treated W is mounted is provided, and the mounting table 30 is connected to the lifting and lowering rod 24 of the lifting and lowering device 23 provided outside the first carburizing chamber 3a. That is, the mounting table 30 is constituted to be able to go up and down by the lifting and lowering device 23.
  • the lifting and lowering rod 24 is provided to penetrate a bottom surface of the delivery part 20 of the first carburizing chamber 3a, and a gap in a penetration part between the lifting and lowering rod 24 and the delivery part 20 is sealed.
  • the shape of the lifting and lowering rod 24 is not limited in particular, and the lifting and lowering rod 24 may also be one with a square transverse section. That is, the lifting and lowering rod 24 only needs to be a member connectable to the mounting table 30 (a lifting and lowering member).
  • a transfer port 25 through which the transfer arm 40 can pass is provided in a sidewall of the delivery part 20 on the transfer apparatus side. Further, on the exterior of the sidewall of the delivery part 20 on the transfer apparatus side, a transfer port door 26 to open and close the transfer port 25 is provided.
  • the transfer port door 26 is provided to be movable up and down by a door opening and closing mechanism (not illustrated).
  • the turntable 60 on which the object to be treated W is mountable is provided.
  • a center bottom surface of the turntable 60 is connected to a drive rod 62 of a drive device 61 provided outside the first carburizing chamber 3a (a support post of the turntable 60), and the drive device 61 has a constitution to rotate and lift and lower the drive rod 62. That is, the turntable 60 is constituted to be able to rotate and go up and down by the drive device 61.
  • the drive rod 62 is provided to penetrate the bottom surface of the delivery part 20 of the first carburizing chamber 3a between the mounting table 30 and the transfer port 25, and a gap between the drive rod 62 and the bottom surface of the delivery part 20 is sealed.
  • the shape of the drive rod 62 is not limited in particular, and the drive rod 62 may also be one with a square transverse section. That is, the drive rod 62 only needs to be a member connectable to the turntable 60 (a drive member).
  • the turntable 60 includes a first support part 63 to support a first object to be treated W and a second support part 64 to support a second object to be treated W.
  • the first support part 63 is positioned above the mounting table 30, and the second support part 64 is at a position line-symmetric to the first support part 63 about a rotation axis R of the drive rod 62 when seen on a vertical section illustrated in FIG. 2 .
  • the transfer arm 40 illustrated in FIG. 2 is positioned above the second support part 64.
  • the delivery of the object to be treated W is performed on the first support part 63 or the second support part 64 of the turntable 60.
  • FIG. 3 is a cross-sectional view taken along A-A in FIG. 2 (a plan view of an A-A cross section).
  • the outline of the object to be treated W of the case when the object to be treated W is supported on the first support part 63 of the turntable 6 and the outline of the object to be treated W of the case when the object to be treated W is supported on the second support part 64 of the turntable 60 are each illustrated by a dotted line.
  • the outline of the mounting table 30 of the case when it is assumed that the mounting table 30 is positioned below the second support part 64 of the turntable 60 is also illustrated by a dotted line.
  • the outline of the drive rod 62 connected to the turntable 60 is illustrated by a dashed-dotted line.
  • the mounting table 30 is formed integrally by a circular plate 31 in the center in plan view and three projecting parts projecting radially from the circular plate 31, (which will be described as "support blades 32" hereinafter). Angles each formed by the support blades are equal to one another (120° in this embodiment), and on tips of the individual support blades 32, mounting table support pins 33 to support the object to be treated W are provided. That is, the object to be treated W is three-point supported by the mounting table support pins 33.
  • heat-resistant stainless steel or the like is applied to the material of the individual support blades 32 and mounting table support pins 33.
  • the turntable 60 has a rectangular shape in plan view, and is provided in a positional relationship such that the first support part 63, the drive rod 62, and the second support part 64 are disposed in a linear arrangement so as to sandwich the rotation axis R of the drive rod 62 by the first support part 63 and the second support part 64.
  • a first space part 65 and a second space part 66 each allowing the mounting table 30 that goes up and down to pass through are provided respectively.
  • the first space part 65 has a shape such that a base part of the turntable 60 is cut out along the outline of the mounting table 30 in plan view, and the second space part 66 has a shape point-symmetric to the first space part 65 about the rotation axis R of the drive rod 62 in plan view as a symmetric point.
  • a first cutout part 67 and a second cutout part 68 are provided respectively in order for the turntable 60 going up and down to be prevented from coming into contact with individual projecting parts 44 of the later-described transfer arm 40.
  • the first cutout part 67 has a shape such that an end part of the turntable 60 is cut out along the outline of the individual projecting parts 44 in plan view
  • the second cutout part 68 has a shape point-symmetric to the first cutout part 67 about the rotation axis R of the drive rod 62 in plan view as a symmetric point.
  • first space part 65 and the second space part 66 each having a point-symmetric shape
  • first cutout part 67 and the second cutout part 68 each having a point-symmetric shape are provided in the turntable 60, so that even when the turntable 60 rotates by 180°, parts do not come into contact with each other when the mounting table 30 goes up and down and when the turntable 60 goes up and down.
  • first support part 63 and the second support part 64 of the turntable 60 are disposed at point-symmetric positions about the rotation axis R of the drive rod 62 in plan view as a symmetric point, so that even when the turntable 60 rotates by 180°, the position on the horizontal plane of the first support part 63 or the second support part 64 coming above the mounting table 30 does not change. That is, only the going up and down movement of the mounting table 30 without horizontal movement makes it possible to perform the delivery of the object to be treated W. Therefore, it is not necessary to provide a horizontal moving mechanism, a rotation mechanism, or the like of the mounting table 30.
  • first support part 63 and the second support part 64 are disposed at point-symmetric positions about the rotation axis R of the drive rod 62 in plan view as a symmetric point, so that when the object to be treated W is placed on both the first support part 63 and the second support part 64, the two objects to be treated are supported at the positions farthest from each other. This makes it possible to prevent temperature decrease of the heat-treated object to be treated caused by an effect of the object to be treated that has not undergone a heat treatment yet.
  • the first support part 63, the drive rod 62 of the turntable 60, and the second support part 64 are provided in such a positional relationship as to be disposed in a line arrangement in plan view, the objects to be treated supported on the individual support parts 63 and 64 can be separated from each other to some extent even if the individual support parts 63 and 64 are not disposed at the point-symmetric positions. Therefore, it is possible to prevent the temperature decrease of the heat-treated object to be treated.
  • turntable support pins 69 to support the objects to be treated W are provided, and the object to be treated W is three-point supported by the turntable support pins 69.
  • heat-resistant stainless steel or the like is applied to the material of the turntable support pins 69.
  • a tip part 41 of the transfer arm 40 positioned above the second support part 64 of the turntable 60 has a three-pronged shape in plan view.
  • a three-pronged shape part projects from a transfer arm main body 45 toward the center of the circular plate 31 of the mounting table 30 on the assumption that the mounting table 30 is in the second space part 66 of the turntable 60 (the projecting parts 44).
  • the projecting parts 44 are each provided to be able to support the object to be treated W between the support blades of the mounting table 30 in plan view, and angles each formed by the projecting parts are equal to one another (120° in this embodiment).
  • transfer support pins 50 to support the object to be treated W when the object to be treated W is transferred are provided, and the object to be treated W is three-point supported by the transfer support pins 50.
  • auxiliary pins 70 to lead the object to be treated W to be mounted at an appropriate position of the transfer support pins 50 are provided.
  • the appropriate position means the position where the center of the object to be treated W and the center of the mounting table 30 (the circular plate 31) agree with each other, for example.
  • the individual auxiliary pins 70 also have a function of preventing the object to be treated W from falling.
  • a part of each of the auxiliary pins 70 on the side facing the side surface of the object to be treated W is formed into such a tapered shape as to be thinner as it goes up to an upper end of the pin (tapered parts 70a).
  • the object to be treated W deviates from the appropriate mounting position when the object to be treated W is mounted on the transfer support pins 50, for example, the object to be treated W moves along the tapered parts 70a of the individual auxiliary pins 70, to thereby be led to the correct position.
  • the mounting position of the object to be treated W on the transfer support pins 50 does not vary among objects to be treated, and the mounting positions are always the same.
  • the auxiliary pins 70 facing (or being in contact with) the side surface of the object to be treated W, the positional deviation and the falling of the object to be treated W are regulated. Therefore, during the transfer of the object to be treated W, the deviation from the mounting position of the object to be treated W on the transfer support pins 50 and the falling of the object to be treated W are regulated.
  • heat-resistant stainless steel or the like is applied to the materials of the transfer support pins 50 and the auxiliary pins 70.
  • the individual mounting table support pins 33 and the individual turntable support pins 69 on the first support part 63 and the second support part 64 of the turntable 60 are preferably provided to be disposed on the same circumference in plan view when the delivery of the object to be treated W is performed. This makes it possible to reduce tilting of the object to be treated W and the like when the object to be treated W is delivered to the turntable 60 from the mounting table 30 and the object to be treated W is delivered to the mounting table 30 from the turntable 60, and to suppress deviation of the object to be treated W from the appropriate mounting position.
  • the individual transfer support pins 50 and the individual turntable support pins 69 on the first support part 63 and the second support part 64 of the turntable 60 are preferably provided to be disposed on the same circumference in plan view when the delivery of the object to be treated W is performed.
  • the carburizing and quenching facility 1 is constituted as above.
  • the carburizing and quenching facility 1 includes not-illustrated constitutions necessary for performing a general vacuum carburizing treatment, which are an exhaust mechanism, a carburizing gas introduction mechanism, and the like.
  • constitutions of the temperature increasing chamber 2, the second carburizing chamber 3b, the third carburizing chamber 3c, and the quenching chamber 4 that are illustrated in FIG. 1 are not explained, but the basic constitution of each of the treatment chambers is similar to that of the first carburizing chamber 3a.
  • a cooling gas introduction mechanism is provided in the heat treatment part 21, and thereby gas quenching is performed.
  • FIG. 5(a) to FIG. 5(f) and FIG. 6(a) and FIG. 6(b) there will be explained one example of a transfer method of objects to be treated W1 and W2 in a carburizing treatment process to be performed by using the carburizing and quenching facility 1.
  • FIG. 5(a) to FIG. 5(f) and FIG. 6(a) and FIG. 6(b) illustrations of some components such as the support pins of the object to be treated W and the induction heating coil are omitted.
  • a carburizing treatment is performed in the heat treatment part 21 of the first carburizing chamber 3a.
  • the partition door 27 is opened and the mounting table 30 on which the object to be treated W1 is mounted is lowered.
  • the mounting table 30 passes through the first space part 65 of the turntable 60, and the object to be treated W1 is delivered to the first support part 63 of the turntable 60 from the mounting table 30.
  • the transfer port door 26 is opened.
  • the transfer arm 40 on which the object to be treated W2 is supported is moved forward to transfer the object to be treated W2 into the delivery part 20 of the first carburizing chamber 3a.
  • the transfer arm 40 is moved forward until the object to be treated W2 is positioned above the second support part 64 of the turntable 60.
  • the object to be treated W2 is in a state where the temperature of the object to be treated W2 is increased up to the temperature suitable for the carburizing treatment in the temperature increasing chamber 2 positioned upstream from the first carburizing chamber 3a.
  • the turntable 60 is lifted above the transfer arm 40. At this time, the turntable 60 goes up in such a manner that the individual projecting parts 44 of the transfer arm 40 pass through the second cutout part 68 of the turntable 60, and the object to be treated W2 is delivered to the second support part 64 of the turntable 60 from the transfer arm 40.
  • the turntable 60 is rotated 180°. Thereafter, as illustrated in FIG. 5(f) , the turntable 60 is lowered below the transfer arm 40. At this time, the object to be treated W1 is delivered to the transfer arm 40 from the first support part 63 of the turntable 60.
  • the transfer arm 40 is moved backward to transfer the object to be treated W1 on which the carburizing treatment has been performed from the delivery part 20.
  • the mounting table 30 on which the object to be treated W2 is mounted is lifted up to the heat treatment part 21.
  • the object to be treated W2 is delivered to the mounting table 30 from the second support part 64 of the turntable 60.
  • the partition door 27 and the transfer port door 26 are closed, and after evacuation is performed, a carburizing treatment is performed on the object to be treated W2.
  • the transfer of the object to be treated into the first carburizing chamber 3a and the transfer of the object to be treated from the first carburizing chamber 3a can be performed at the same timing, so that the transfer of the object to be treated W1 from the heat treatment part 21 into the delivery part 20 and the transfer of the object to be treated W2 from the delivery part 20 into the heat treatment part 21 can also be performed by opening the partition door 27 one time. That is, the opening and closing frequency of the partition door 27 can also be reduced. Thereby, the frequency of which the heat treatment part 21 is affected by the atmosphere of the delivery part 20 lower in temperature than the heat treatment part 21 is reduced, and thus it is possible to suppress temperature decrease in the heat treatment part 21. Therefore, it is possible to shorten the time taken until the temperature inside the heat treatment part 21 reaches the temperature suitable for carburizing, resulting in that the treatment time in the first carburizing chamber 3a can be shortened.
  • the transfer-out of the object to be treated W1 and the transfer-in of the object to be treated W2 are performed not only in the first carburizing chamber 3a, but also in the temperature increasing chamber 2, the second carburizing chamber 3b, the third carburizing chamber 3c, and the quenching chamber 4 that are illustrated in FIG. 1 in the same manner. Therefore, the treatment time in each of the treatment chambers can also be shortened, so that it becomes possible to drastically shorten the time taken for the entire carburizing and quenching treatment.
  • the frequency of which the transfer-in/out of the object to be treated W are performed is increased, so that the effect of shortening the treatment time obtained by performing the transfer-in/out of the object to be treated W at the same timing is particularly increased.
  • the above-described embodiment is designed that the carburizing treatment is performed on the object to be treated W in the first to third carburizing chambers 3a to 3c in order, and thereby a series of carburizing treatments is completed, but in carburizing chambers 3a to 3c of each of the first carburizing chamber 3a, the second carburizing chamber 3b, and the third carburizing chamber 3c, a carburizing treatment on the single object to be treated W may also be completed.
  • the object to be treated W2 transferred from the temperature increasing chamber 2 is transferred into, of the first to third carburizing chambers 3a to 3c, the carburizing chambers 3a to 3c without the object to be treated W being transferred thereinto.
  • the disposition and the number of the individual treatment chambers are not limited to the ones explained in the above-described embodiment.
  • the carburizing chambers 3 are constituted into a single carburizing chamber, or even in the case where the transfer method of the object to be treated W explained in the above-described embodiment is applied to a treatment chamber not explained in the above-described embodiment (for example, a tempering chamber), the transfer-in/out time of the object to be treated W can be shortened.
  • the present invention is not limited to uses of the treatment chambers, but is applied to the treatment chamber where at least one treatment related to the carburizing and quenching treatment is performed on the object to be treated, and thereby it is possible to enjoy the operation and effect explained in the above-described embodiment.
  • the treatments related to the carburizing and quenching treatment are treatments necessary for a general carburizing and quenching treatment such as preheating, carburizing, diffusion, cooling, and quenching (including gas quenching).
  • the above-described embodiment is designed to perform a vacuum carburizing treatment in the carburizing and quenching facility 1, but the carburizing method is not limited to this.
  • the partition door 27 is a drawn-type sliding door, but may also be a double-door type door opening inward or outward, for example. Further, the place where the partition door 27 is provided is also not limited in particular, and the partition door 27 only needs to be provided so as to block the atmosphere communicating with the delivery part 20 and the heat treatment part 21. Further, the treatment chamber where the treatment of the object to be treated W is performed does not need to be constituted by two chambers of the delivery part 20 and the heat treatment part 21 as is the above-described embodiment. For example, a constitution in which the delivery and the heat treatment of the object to be treated W are performed in a single chamber may also be applied.
  • the transfer-in/out of the object to be treated can be performed by opening the transfer port door one time, so that it is possible to shorten the time taken for the transfer-in/out of the object to be treated. Further, the opening and closing frequency of the transfer port door is reduced, so that the frequency of which the atmosphere in the treatment chamber comes into contact with the atmosphere outside the treatment chamber that is lower in temperature than that in the treatment chamber is also reduced, thereby making it possible to prevent the temperature decrease in the treatment chamber.
  • the object to be treated W is delivered between the turntable 60 and the transfer arm 40, but it is also possible that a lifting and lowering mechanism is not provided for the turntable 60 but is provided for the transfer arm 40 and by lifting and lowering the transfer arm 40, the object to be treated W is delivered between the turntable 60 and the transfer arm 40, for example.
  • the lifting and lowering mechanism may also be provided for both the turntable 60 and the transfer arm 40.
  • the method of delivering the object to be treated W between the turntable 60 and the transfer arm 40 is changed appropriately according to the shape of each of the treatment chambers, a heating means of the object to be treated W, and the like, and as along as a relative moving mechanism that relatively brings the turntable 60 and the transfer arm 40 close to each other in order to mount the object to be treated W transferred by the transfer arm 40 on the turntable 60 is provided, the object to be treated W can be delivered.
  • a transfer procedure of the object to be treated W is also not limited to the one explained in the above-described embodiment.
  • the number of the support blades 32 of the mounting table 30 and the angles each formed by the support blades, and the number of projecting parts 44 of the transfer arm 40 and the angles each formed by the projecting parts are not limited to the ones explained in the above-described embodiment.
  • the shape of the mounting table 30 and the shape of the transfer arm 40 are also not limited to the ones explained in the above-described embodiment.
  • the shape of the turntable 60 is changed appropriately according to the shape of the mounting table 30 and the shape of the transfer arm 40.
  • the number and the disposition of the mounting table support pins 33, the number and the disposition of the transfer support pins 50, and the number and the disposition of the turntable support pins 69 are changed appropriately according to the shape and the size of the object to be treated W. That is, the number of them and the disposition of them only need to be the number (at least three) and the disposition capable of supporting the object to be treated W in a state where the object to be treated W does not tilt when the object to be treated W is mounted on the individual support pins.
  • auxiliary pin 70 of the side facing the side surface of the object to be treated W is formed into a tapered shape, but the entire auxiliary pin 70 of the side facing the side surface of the object to be treated W may also be formed into a tapered shape.
  • the transfer action of the object to be treated explained in the above-described embodiment can be performed.
  • a contact area with the object to be treated can be made small, so that temperature changes inside the object to be treated to be caused when the object to be treated is heated and cooled can be made uniform.
  • the contact area between the individual support pins and the object to be treated is small, thereby making it possible to advance carburizing on the lower surface of the object to be treated and carburizing on the other parts of the object to be treated uniformly. Thereby, it is possible to improve the quality of carburizing treatment of the object to be treated.
  • the object to be treated W is treated individually, but it is also possible that a jig capable of being supported on the transfer arm 40 or the mounting table 30 is used and by the jig, two or more of the objects to be treated W are fixed, and thereby two or more of the objects to be treated are treated simultaneously.
  • the frequency of the object to be treated W being transferred in and out is increased, so that the effect of shortening the treatment time explained in the above-described embodiment is particularly increased.
  • an object to be treated formed of a circular top surface part W t and a cylindrical side surface part W s illustrated in FIG. 7 and
  • FIG. 8 is also included, in addition to objects to be treated having a columnar shape and having a circular ring shape.
  • a concrete example of the circular object to be treated is a gear of a machine part and the like.
  • the object to be treated W is one having a shape formed of the circular top surface part W t and the cylindrical side surface part W s , namely an object to be treated W having a downward recessed shape such that a circular tray is inverted
  • the three transfer support pins 50 on the transfer arm 40 are disposed on the transfer arm 40 so as to come into contact with (or so as to be in a state extremely close to) the top surface part W t and the side surface part W s inside the downward recessed part, to thereby three-point support the object to be treated W.
  • the transfer support pins 50 are disposed on the circumference having substantially the same diameter as the inside diameter of the side surface part W s of the object to be treated W as above, the transfer support pins 50 can support the object to be treated W in such a state as to come into contact with the side surface part W s of the object to be treated W, so that it is possible to perform positional regulation of the object to be treated W.
  • the mounting table support pins 33 and the turntable support pins 69 are also disposed in the same manner as that of the transfer support pins 50. That is, at least the three mounting table support pins 33 and the three turntable support pins 69 only need to be disposed so as to come into contact with (or so as to be in a state extremely close to) the top surface part W t and the side surface part W s inside the downward recessed part of the object to be treated W. Thereby, it is possible to support the object to be treated W on the mounting table 30 and to perform positional regulation of the object to be treated W.
  • the shape of the object to be treated W is not limited to the circular shape. Even if the object to be treated W has another shape, as long as the transfer arm 40, the mounting table 30, and the turntable 60 that are capable of supporting the object to be treated W are included and it is constituted so that the object to be treated W can be delivered between the transfer arm 40 and the turntable 60 and between the mounting table 30 and the turntable 60, it is possible to enjoy the effect explained in the above-described embodiment.
  • the object to be treated W may also be an object to be treated W with its vertical cross-sectional shape being a downward recessed shape that is formed of not the "circular top surface part W t " and the "cylindrical side surface part W s " illustrated in FIG. 7 and FIG. 8 but a "top surface part" and a "side surface part.”
  • the transfer support pins 50 are disposed so as to perform positional regulation of the aforementioned object to be treated by coming into contact with or coming close to an inner wall of the side surface part of the object to be treated when the object to be treated is supported on the transfer arm 40, the positional regulation of the object to be treated W can be performed by the transfer support pins 50.
  • the transfer support pins 50 are provided and it is constituted so that the single transfer support pin 50 may come into contact with a single inner side surface of the "side surface part," and thereby positional regulation of the object to be treated can be performed.
  • the mounting table support pins 33 are disposed so as to perform positional regulation of the aforementioned object to be treated by coming into contact with or coming close to the inner wall of the side surface part of the object to be treated when the object to be treated is supported on the mounting table 30, the positional regulation of the object to be treated W can be performed by the mounting table support pins 33.
  • the turntable support pins 69 are disposed so as to perform positional regulation of the aforementioned object to be treated by coming into contact with or coming close to the inner wall of the side surface part of the object to be treated when the object to be treated is supported on the turntable 60, the positional regulation of the object to be treated W can be performed by the turntable support pins 69.
  • the present invention can be applied to a carburizing and quenching treatment of an object to be treated.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Engineering & Computer Science (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
EP15000648.4A 2014-03-06 2015-03-05 Installation de carburisation et de trempe Active EP2915888B1 (fr)

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JP2014043824A JP6403959B2 (ja) 2014-03-06 2014-03-06 浸炭焼入れ設備

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018028776A1 (fr) * 2016-08-10 2018-02-15 Härterei Reese Bochum Gmbh Dispositif de chargement pour le traitement thermique de pièces avec stabilité de forme

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Publication number Priority date Publication date Assignee Title
JPH1053809A (ja) 1996-06-06 1998-02-24 Dowa Mining Co Ltd 浸炭焼入焼戻方法及び装置
US5997290A (en) * 1996-08-30 1999-12-07 Hillingrathner; Franz Revolving transfer furnace for treating workpieces
US6065964A (en) * 1997-12-02 2000-05-23 Etudes Et Constructions Mecaniques Modular vacuum thermal processing installation
JP2002294429A (ja) 2001-03-29 2002-10-09 Dowa Mining Co Ltd 浸炭焼入れ方法及び浸炭焼入れ装置
US20030113186A1 (en) * 2001-12-14 2003-06-19 Jh Corporation Vacuum heat-treatment apparatus
DE10359458A1 (de) * 2003-12-17 2005-07-28 Ald Vacuum Technologies Ag Vorrichtung zur verketteten Wärmebehandlung von Werkstücken unter Unterdruck

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JP2511566B2 (ja) * 1990-09-20 1996-06-26 株式会社芝浦製作所 搬送装置
JPH0521579A (ja) * 1991-07-16 1993-01-29 Fujitsu Ltd 真空処理装置
JPH07176472A (ja) * 1993-12-20 1995-07-14 Dainippon Screen Mfg Co Ltd 基板加熱装置
JP5114270B2 (ja) * 2008-03-31 2013-01-09 光洋サーモシステム株式会社 誘導加熱式浸炭処理装置のワーク支持具
JP5744435B2 (ja) * 2010-07-30 2015-07-08 高周波熱錬株式会社 ワークの熱処理装置
JP5973306B2 (ja) * 2012-09-28 2016-08-23 Ｄｏｗａサーモテック株式会社 熱処理装置
JP6195773B2 (ja) * 2013-10-11 2017-09-13 Ｄｏｗａサーモテック株式会社 浸炭焼入れ設備

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1053809A (ja) 1996-06-06 1998-02-24 Dowa Mining Co Ltd 浸炭焼入焼戻方法及び装置
US5997290A (en) * 1996-08-30 1999-12-07 Hillingrathner; Franz Revolving transfer furnace for treating workpieces
US6065964A (en) * 1997-12-02 2000-05-23 Etudes Et Constructions Mecaniques Modular vacuum thermal processing installation
JP2002294429A (ja) 2001-03-29 2002-10-09 Dowa Mining Co Ltd 浸炭焼入れ方法及び浸炭焼入れ装置
US20030113186A1 (en) * 2001-12-14 2003-06-19 Jh Corporation Vacuum heat-treatment apparatus
DE10359458A1 (de) * 2003-12-17 2005-07-28 Ald Vacuum Technologies Ag Vorrichtung zur verketteten Wärmebehandlung von Werkstücken unter Unterdruck

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018028776A1 (fr) * 2016-08-10 2018-02-15 Härterei Reese Bochum Gmbh Dispositif de chargement pour le traitement thermique de pièces avec stabilité de forme

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EP2915888B1 (fr) 2018-12-05
JP2015168842A (ja) 2015-09-28

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