JP2016003372A - Heat treatment facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the time required for conveyance of a heat-treated material from a heating chamber to a cooling chamber and for conveyance of another material to be treated to the heating chamber in a heat treatment device in which the heating and cooling chambers are provided separately, and the material to be treated is carried in and out of the heating and cooling chambers using a conveyance unit to be heat-treated.SOLUTION: In a heat treatment facility, a carrying-in part 1, a heating chamber 10 and a cooling chamber 20 are separately provided, and also a conveyance unit 30 is provided to convey the material to be treated carried in from the carrying-in part to the heating chamber and to convey the material heated in the heating chamber to the cooling chamber by moving between the carrying-in part and the heating and cooling chambers. The conveyance unit comprises: a delivery chamber 32 for delivering the material between the carrying-in part and the heating and cooling chambers; a standby chamber 33 for causing the material carried in the delivery chamber from the carrying-in part to be standby; and a thermal insulation chamber 34 for keeping warm the material heated in the heating chamber and carried in the delivery chamber at a prescribed temperature.

Description

  In the present invention, a carry-in unit for carrying in a workpiece, a heating chamber for heating the workpiece, and a cooling chamber for cooling the heated workpiece are provided separately, and the carry-in unit and the heating unit are heated. A transport unit is provided that moves between the chamber and the cooling chamber, transports the object to be processed loaded from the loading section to the heating chamber, and conveys the object to be processed heated in the heating chamber to the cooling chamber. It relates to heat treatment equipment. In particular, a delivery chamber that delivers the object to be processed between the carry-in unit, the heating chamber, and the cooling chamber to the transport unit, and a warming chamber that keeps the object to be processed heated in the heating chamber at a predetermined temperature. In a heat treatment facility in which the object to be processed heated in the heating chamber is carried into the temperature-retaining room through the delivery chamber in the transport unit, the heated object to be treated is brought into the temperature-retaining room and then heated. It is characterized in that a new workpiece can be efficiently carried into the room.

  Conventionally, as a heat treatment facility for carburizing and quenching, the workpieces are sequentially introduced into a long continuous furnace, and the workpieces are sequentially moved in the continuous furnace to heat the workpieces. , A continuous furnace type heat treatment facility that continuously performs heat treatment such as soaking, and a batch furnace that performs heat treatment such as heating and soaking without moving the object to be processed in an independent batch furnace Heat treatment equipment of the type is known.

  Here, in the case of a continuous furnace type heat treatment facility, the workpiece is continuously heat treated with a constant heat treatment pattern, so the productivity is good, but the heat treatment pattern such as temperature rise and temperature fall has become constant, As described above, there is a problem that it is not possible to flexibly respond to a request for producing various kinds of products in small quantities.

  On the other hand, in the batch furnace type heat treatment equipment, heat treatment is performed by changing the heat treatment conditions such as heating and soaking in one furnace, so that it takes a lot of time to process one workpiece. There was a problem of poor productivity.

  For this reason, in recent years, as shown in Patent Document 1, a carry-in unit for carrying in a workpiece, a heating chamber for heating the workpiece, and a cooling chamber for cooling the heated workpiece are separated. After the workpiece is carried into the transfer unit from the carry-in section, the transfer unit is moved to the position of the heating chamber and connected to the heating chamber, and the workpiece is heated from the transfer unit. When the object to be processed is heated in one of the heating chambers, the object to be processed is heated in a plurality of heating chambers by repeating the above operation. The transport unit is moved and connected to the position of the heating chamber, and the heated object to be processed is carried into the transport unit, and then the transport unit is moved to the position of the cooling chamber and connected to the cooling chamber. Heated Treated was so as to cool by carried into the cooling chamber from the transport unit heat treatment equipment is proposed.

  However, after the workpiece heated in the heating chamber as described above is carried into the transport unit, the transport unit is moved to the position of the cooling chamber and connected to the cooling chamber, and the heated workpiece It takes time until the workpiece is carried into the cooling chamber from the transfer unit, and the temperature of the workpiece to be heated decreases during that time, and when the workpiece is quenched in the cooling chamber, the temperature of the workpiece is There was a problem that the quenching failure occurred at a temperature lower than the predetermined temperature, and the quality of the product was lowered. In particular, when heat treatment such as carburizing and quenching is performed on the workpiece, it is necessary to connect the transport unit to a heating chamber or a cooling chamber and to deliver the workpiece in a non-oxidizing atmosphere. Therefore, it takes time to make the inside of the transfer unit and the connection portion into a non-oxidizing atmosphere, and the time until the heated object to be processed is transferred from the transfer unit to the cooling chamber is further increased. There was a problem that the temperature of the liquid crystal further decreased.

  Further, in Patent Document 2, a transfer chamber that transfers a workpiece to and from the heating chamber and the cooling chamber, and a workpiece that is heated in the heating chamber and carried into the transfer chamber are transferred to the transport unit. In the state in which the temperature-retaining room is provided and the transfer unit is connected to the heating chamber as described above, the object to be processed heated in the heating chamber is carried into the temperature-retaining room through the delivery chamber in the transfer unit. In a state where the object to be processed heated in the chamber is kept warm, the transfer unit is moved to the position of the cooling chamber and connected to the cooling chamber, and the object to be processed which has been kept warm in the heat retaining room is cooled through the delivery chamber. Heat treatment equipment that can be brought into the room has been proposed.

  Here, also in such a heat treatment facility, when the transport unit is connected to the heating chamber as described above, and the object to be processed heated in the heating chamber is carried into the storage room through the delivery chamber in the transport unit, In this heating chamber, there is no object to be processed, and it is necessary to bring the object to be processed into this heating chamber and heat it.

  However, in order to newly carry a workpiece into the heating chamber, the conveyance unit is guided to the position of the carry-in section while keeping the workpiece heated in the heat-retaining room as described above. Then, after the workpiece is carried into the transport unit from the carry-in section, the transport unit is moved to the position of the heating chamber and connected to the heating chamber, and the workpiece is carried into the heating chamber from the transport unit. Therefore, it takes a lot of time to bring the object to be treated into the heating chamber and heat it, resulting in a problem of poor productivity. In particular, when heat treatment such as carburizing and quenching is performed on the workpiece, it is necessary to connect the transport unit to the heating chamber as described above and to deliver the workpiece in a non-oxidizing atmosphere. Therefore, it takes time to make the inside of the transport unit and the connection part into a non-oxidizing atmosphere, and the time until the workpiece is newly heated in the heating chamber is further increased, and the productivity is further deteriorated. There was a problem.

JP 2013-64184 A JP 2006-63363 A

  The present invention separately provides a carry-in section for carrying in a workpiece, a heating chamber for heating the workpiece, and a cooling chamber for cooling the heated workpiece, and the carry-in section and the heating chamber By the transfer unit moving between the cooling chambers, the object to be processed that has been carried in from the carry-in section is conveyed to the heating chamber and heated, and the object to be processed that has been heated in the heating chamber is conveyed to the cooling chamber and cooled. An object of the present invention is to solve the above-described various problems in the heat treatment equipment.

  In particular, in the present invention, the transfer unit that delivers the object to be processed among the carry-in unit, the heating chamber, and the cooling chamber to the transport unit, and the object to be processed heated in the heating chamber at a predetermined temperature. In the heat treatment facility, the heated processing object is carried into the thermal storage room in the heat treatment facility in which the heated processing object is brought into the thermal storage room through the delivery chamber in the transport unit. Then, it is an object to make it possible to efficiently carry a new object to be processed into the heating chamber.

  In the present invention, in order to solve the above-described problems, a carry-in unit for carrying in the workpiece, a heating chamber for heating the workpiece, and a cooling chamber for cooling the heated workpiece are separated. And moving between the carry-in unit, the heating chamber, and the cooling chamber to transport the workpiece carried in from the carry-in unit to the heating chamber, and the workpiece heated in the heating chamber. In a heat treatment facility provided with a transfer unit to be transferred to the cooling chamber, a transfer chamber for transferring an object to be processed between the transfer portion, the heating chamber, and the cooling chamber to the transfer unit; and the transfer portion A waiting room for waiting for the object to be processed carried into the delivery chamber and a warming room for keeping the object heated in the heating chamber and carried into the delivery chamber at a predetermined temperature were provided.

  And like the heat treatment equipment of the present invention, the transfer unit is provided with a delivery chamber for delivering the workpiece between the carry-in unit, the heating chamber, and the cooling chamber, and the workpiece carried into the delivery chamber from the carry-in unit. When a standby chamber for waiting and a warming chamber for keeping the workpiece heated in the heating chamber and carried into the delivery chamber at a predetermined temperature are provided, the workpiece carried into the standby chamber from the carry-in section is In a state of waiting, the transport unit is guided to the position of the heating chamber, and the object to be processed heated in the heating chamber is brought into the storage room via the transfer chamber of the transport unit, and then, as it is, The object to be processed that has been waiting in the waiting chamber can be heated by being carried into the heating chamber via the delivery chamber.

  Here, when providing the standby chamber in the transfer unit as described above, the position of the standby chamber can be moved between the delivery chamber and the workpiece to be processed between the delivery chamber and the storage room. The position is not particularly limited as long as the position does not get in the way of movement, and for example, a waiting room can be provided above the delivery room.

  Here, in the heat treatment equipment according to the present invention, a connecting portion that connects the delivery chamber in the transfer unit to the heating chamber and the cooling chamber in a sealed state is provided, and a workpiece to be processed loaded from the loading portion is on standby. In a state of waiting in a chamber, the connecting portion is connected to the heating chamber, and an object to be processed that is heated in a non-oxidizing atmosphere in the heating chamber is removed from the connecting portion in the non-oxidizing atmosphere. The workpiece to be treated in the standby chamber is introduced into the heating chamber through the delivery chamber, while being guided to the warming chamber through the delivery chamber. The object to be processed, which is connected to the cooling chamber and kept at a predetermined temperature in a non-oxidizing atmosphere in the warming room, is transferred from the connecting part to the cooling chamber via the delivery chamber in the non-oxidizing atmosphere. To guide Kill. The non-oxidizing atmosphere means an atmosphere in which a heated object is not oxidized. For example, a reduced pressure atmosphere such as a vacuum, an inert atmosphere using an inert gas, or a reduced pressure atmosphere and an inert atmosphere. It means that the atmosphere is combined with the atmosphere.

  Further, in the heat treatment equipment of the present invention, when carburizing treatment is performed by heat-treating an object to be treated in a non-oxidizing atmosphere as described above, sealed opening / closing doors are respectively provided in the heating chamber and the cooling chamber. And opening and closing the opening and closing doors when delivering the workpiece to and from the delivery chamber of the transport unit, and sealing between the delivery chamber and the storage room in the transport unit. When the workpiece is moved between the delivery chamber and the greenhouse, this door can be opened and closed. Further, a sealing type opening / closing door is provided between the connecting portion and the delivery chamber, and the opening / closing door is opened and closed when the workpiece is delivered between the delivery chamber and the heating chamber and the cooling chamber. Can be.

  In the heat treatment facility according to the present invention, as described above, the transfer unit delivers the workpiece between the carry-in unit, the heating chamber, and the cooling chamber, and the workpiece to be carried into the delivery chamber from the carry-in unit. Since the standby chamber for waiting for the temperature and the warming room for keeping the heated processed material carried into the delivery chamber from the heating chamber at a predetermined temperature are provided, the processed material carried into the standby chamber from the carry-in section The transport unit is guided to the position of the heating chamber in the state of waiting, and the workpiece heated in the heating chamber is brought into the storage room via the transfer chamber of the transport unit, and then left as it is. The object to be processed waiting in the standby chamber can be carried into the heating chamber via the delivery chamber and heated.

  As a result, in the heat treatment facility according to the present invention, the object to be processed heated in the heating chamber is carried into the storage room through the delivery chamber in the transport unit, and then the new object to be treated is carried into the heating chamber and heated. It is possible to significantly reduce the time required for the production, and the productivity is remarkably improved.

  In addition, when performing heat treatment such as carburizing and quenching on an object to be processed by the heat treatment equipment in the present invention, a connecting portion for connecting the delivery chamber in the transfer unit to the heating chamber and the cooling chamber in a sealed state is provided. In a state where the workpiece to be loaded is kept waiting in the standby chamber, the connecting portion is connected to the heating chamber, and the workpiece heated in the non-oxidizing atmosphere in the heating chamber is connected in the non-oxidizing atmosphere. If the work to be processed is kept in the standby chamber from the section through the delivery chamber, and the workpiece to be waited in the standby room is carried into the heating chamber from the connecting section through the delivery chamber, a new object is introduced into the heating chamber. When loading the processed material, there is no need to newly add a non-oxidizing atmosphere in the transfer unit or the connection part as in the past, and the time for loading a new processed material into the heating chamber is further shortened. It can become allow better heat treatment more efficient, such as carburizing and quenching.

In the heat treatment facility according to one embodiment of the present invention, along the moving direction of the transfer unit, a carry-in unit that loads the workpiece into the transfer unit, a plurality of heating chambers that heat the workpiece, and the heated workpiece It is the schematic plan view which showed the state which arranged the cooling chamber which cools a processed material linearly. It is a schematic sectional explanatory drawing which showed the conveyance unit used for the heat processing equipment which concerns on the said embodiment. FIG. 5 is a schematic cross-sectional explanatory diagram illustrating a state in which an object to be processed is carried into a delivery chamber of a transfer unit from a carry-in unit in the heat treatment facility according to the embodiment. In the heat treatment facility according to the above-described embodiment, the conveyance unit in which the workpiece is carried into the delivery chamber is guided to the position of the appropriate heating chamber, and the conveyance unit is slid toward the heating chamber to connect the conveyance unit. It is a schematic sectional explanatory drawing which showed the state which connected the part to the heating chamber. In the heat treatment equipment according to the embodiment, the opening / closing door of the transfer chamber of the transfer unit and the opening / closing door of the heating chamber are opened, and the object to be processed in the transfer chamber is brought into the heating chamber through the connecting portion. It is a schematic cross-sectional explanatory drawing. In the heat treatment facility according to the above embodiment, with the workpiece to be carried into the heating chamber, the opening / closing door of the delivery chamber and the opening / closing door of the heating chamber are closed, and the transfer unit is slid away from the heating chamber. It is a schematic cross-section explanatory drawing which showed the state. FIG. 4 is a schematic plan view showing a state in which an object to be processed is carried into each heating chamber by the transfer unit and the object to be processed is heated in each heating chamber in the heat treatment facility according to the embodiment. In the heat treatment facility according to the above embodiment, a schematic cross-sectional explanatory diagram showing a state in which an object to be processed, which is carried into the delivery chamber of the transfer unit from the carry-in unit, is put on standby in a standby chamber provided above the delivery chamber. is there. In the heat treatment facility according to the above-described embodiment, the transfer unit is moved to the position of the heating chamber in which the object to be processed is heat-treated in a state where the object to be processed is in the standby chamber, and the transfer unit is directed to the heating chamber. FIG. 6 is a schematic cross-sectional explanatory view showing a state in which the connecting portion in the transport unit is connected to the heating chamber by sliding the connecting portion. In the heat treatment facility according to the above-described embodiment, the opening / closing door in the heating chamber, the opening / closing door on the connecting portion side in the delivery chamber, and the opening / closing door between the delivery chamber and the thermal storage room are opened, and the object to be treated is heated in the heating chamber. It is a schematic cross-section explanatory drawing which showed the state which moved to the thermal storage room through a delivery chamber from a heating chamber. In the heat treatment facility according to the above-described embodiment, the open / close door between the delivery chamber and the warming room is closed, and the heat-treated object is kept warm in the warming room, and then the waiting room above the delivery room. It is schematic sectional drawing which showed the state which carried in the to-be-processed object from the waiting chamber through the delivery chamber to the heating chamber. In the heat treatment facility according to the above-described embodiment, the heat-treated object is kept warm in the heat-retaining room, and the waiting object is brought into the heating chamber, and the opening / closing door and the heating chamber of the delivery chamber FIG. 6 is a schematic cross-sectional explanatory view showing a state in which the door is closed and the transfer unit is slid in a direction away from the heating chamber. In the heat treatment facility according to the above-described embodiment, in a state where the heat-treated object is kept warm in the temperature-retaining room, the transfer unit is moved to the position of the cooling chamber, and the transfer unit is slid toward the cooling chamber. FIG. 5 is a schematic cross-sectional explanatory view showing a state in which a connecting portion in the transport unit is connected to a cooling chamber. In the heat treatment facility according to the above-described embodiment, the open / close door between the delivery chamber and the thermal storage room is opened, the open / close door of the delivery chamber and the open / close door of the cooling chamber are opened, and the object to be treated that has been kept warm in the thermal storage room. It is a schematic sectional explanatory drawing which showed the state carried in into the cooling chamber through the delivery chamber from the heat retention chamber. In the heat treatment facility according to the above embodiment, the open / close door between the delivery chamber and the thermal storage room is closed, the open / close door of the cooling chamber is closed, and the object to be processed carried into the cooling chamber is cooled. FIG. 5 is a schematic cross-sectional explanatory view showing a state in which the conveyance unit is slid away from the cooling chamber by closing the opening / closing door on the connection portion side and then sliding in the direction away from the cooling chamber. It is the schematic plan view which showed the 1st modification of the conveyance unit used in the heat processing equipment which concerns on the said embodiment. It is the schematic plan view which showed the 2nd modification of the conveyance unit used in the heat processing equipment which concerns on the said embodiment. It is the schematic plan view which showed the 3rd modification of the conveyance unit used in the heat processing equipment which concerns on the said embodiment. It is the schematic plan view which showed the 4th modification of the conveyance unit used in the heat processing equipment which concerns on the said embodiment. It is a schematic cross-sectional explanatory view showing a fifth modification of the transfer unit used in the heat treatment facility according to the embodiment.

  Hereinafter, a heat treatment facility according to an embodiment of the present invention will be specifically described with reference to the accompanying drawings. The heat treatment equipment according to the present invention is not limited to the one shown in the following embodiment, and can be implemented with appropriate modifications within a range not changing the gist of the invention.

  In the heat treatment facility according to this embodiment, as shown in FIG. 1, a carry-in unit 1 for carrying in the workpiece W and a plurality of (three in the example shown in the figure) that heat the workpiece W in a non-oxidizing atmosphere. ) And the cooling chamber 20 for cooling the heated workpiece W are separated and arranged linearly.

  Further, a travel rail L is provided along the arrangement direction of the carry-in unit 1, the heating chamber 10, and the cooling chamber 20, and the transport unit 30 is caused to travel along the travel rail L so that the transport unit 30 is moved into the carry-in unit. It is made to move among the part 1, the heating chamber 10, and the cooling chamber 20.

  Then, the workpiece W is carried into the conveyance unit 30 from the carry-in unit 1, the conveyance unit 30 is moved to the heating chamber 10, and the workpiece W carried into the conveyance unit 30 is moved to the heating chamber 10. Then, the workpiece W is heated in the heating chamber 10, and the workpiece W heated in the heating chamber 10 is transported to the cooling chamber 20 by the transport unit 30 and heated. The workpiece W is carried into the cooling chamber 20 from the transport unit 30 and cooled.

  Here, in the heating chamber 10, a hermetic opening / closing door 11 is provided at an opening for transferring the workpiece W to / from the transfer unit 30, and the opening / closing door 11 is closed to close the heating chamber 10. In a state where the pressure is reduced by a pressure reducing device (not shown) to form a non-oxidizing atmosphere, the workpiece W carried into the heating chamber 10 from the transport unit 30 is heated by the heating device (not shown) as described above. I try to let them.

  Further, in the cooling chamber 20, a hermetic opening / closing door 21 is provided in an opening for transferring the workpiece W to / from the transfer unit 30, and the opening / closing door 21 is closed to close the inside of the cooling chamber 20. In a state where the pressure is reduced by a pressure reducing device (not shown) to make a non-oxidizing atmosphere, the heated workpiece W carried into the cooling chamber 20 from the transport unit 30 is cooled as described above. Yes. In order to cool the workpiece W in the cooling chamber 20, for example, an oil cooler (not shown) or the like is provided in the cooling chamber 20, and the heated workpiece W is oil-cooled. W can be hardened. The method for cooling the workpiece W is not limited to oil cooling, and any method such as water cooling or gas cooling may be used.

  In the transport unit 30, a connecting portion 31 that connects the transport unit 30 to the heating chamber 10 and the cooling chamber 20 is provided at a portion facing the heating chamber 10 and the cooling chamber 20. The cooling chamber 20 is also provided with a connecting portion 12 and a connecting portion 22 that are fitted with the connecting portion 31 of the transport unit 30 and connected in a sealed state.

  In the transport unit 30, a delivery chamber 32 that delivers the workpiece W between the carry-in unit 1, the heating chamber 10, and the cooling chamber 20 through the connection unit 31, and above the delivery chamber 32. A standby chamber 33 is provided for waiting for the workpiece W carried into the delivery chamber 32 from the carry-in section 1, and at a position opposite to the heating chamber 10 and the cooling chamber 20 via the delivery chamber 32. In addition, there is provided a thermal insulation chamber 34 that keeps the workpiece W heated in the heating chamber 10 at a predetermined temperature in a non-oxidizing atmosphere.

  In addition, a sealed door 35 is provided at the opening between the connecting portion 31 and the delivery chamber 32, and a sealed door is also provided at the opening between the delivery chamber 32 and the warm storage chamber 34. 36 is provided.

  In connecting the connecting portion 31 in the transport unit 30 to the heating chamber 10 and the cooling chamber 20, in this embodiment, the transport unit 30 is provided with a slide base 37, and the delivery chamber 32 in the transport unit 30 is provided. At the position facing the heating chamber 10 or the cooling chamber 20, the entire conveyance unit 30 is slid toward the heating chamber 10 or the cooling chamber 20, and the connecting portion 31 in the conveyance unit 30 is moved as described above. The connecting portion 12 and the connecting portion 22 provided in the heating chamber 10 and the cooling chamber 20 are connected in a sealed state.

  Further, as shown in FIG. 2, in the transport unit 30, a transfer carriage for transferring the workpiece W between the delivery chamber 32 and the heating chamber 10, the cooling chamber 20, and the thermal storage chamber 34. 41 is provided, and at the position of the delivery chamber 32, a lifting device 42 for lifting the workpiece W held on the transfer carriage 41 is provided, and the lifting device 42 allows the workpiece W to be delivered to the delivery chamber. 32 and the standby chamber 33 provided thereon.

  Here, the workpiece W is moved by the transfer carriage 41, and the workpiece W is set in the set portion 13 of the heating chamber 10, the set portion 23 of the cooling chamber 20, and the set portion 34a of the warming chamber 34. When the workpiece W is taken out from the set parts 13, 23, 34a, a mechanism for raising and lowering the workpiece W is provided on the transfer carriage 41, although not shown. Although not shown, it is also possible to provide an extendable arm for scooping up the workpiece W from below instead of the transfer carriage 41.

  Further, in this embodiment, the arm unit 42a that holds the workpiece W from both sides is used as the lifting device 42. However, the lifting device 42 is not limited to this, Any material may be used as long as the workpiece W can be moved up and down and can be held in a state where the workpiece W is lifted upward.

  Next, in the heat treatment facility according to this embodiment, a case where the workpiece W is heat-treated in a non-oxidizing atmosphere to perform a carburizing process or the like will be described.

  First, as shown in FIG. 3, the transport unit 30 is moved to the position of the carry-in unit 1, the open / close door 36 between the delivery chamber 32 and the warm chamber 34 is closed, and the warm chamber 34 is non-oxidized. While maintaining the atmosphere, the open / close door 35 of the delivery chamber 32 on the side of the connecting portion 31 is opened, and the transfer carriage 41 is placed between the delivery chamber 32 and the carry-in portion 1 as indicated by an arrow. The workpiece W in the carry-in unit 1 is carried into the delivery chamber 32 through the connecting unit 31 by the transfer carriage 41. In this embodiment, the workpiece W in the carry-in unit 1 is carried into the delivery chamber 32 by the transfer carriage 41. However, the workpiece W is moved toward the carry-in unit 1 by the transport unit 30. It is also possible to provide a carry-in device (not shown) for carrying in the delivery chamber 32.

  After the workpiece W is thus carried into the delivery chamber 32 of the transfer unit 30, the opening / closing door 35 is closed, and the delivery chamber 32 and the standby chamber 33 in the transfer unit 30 are reduced in pressure. (Not shown), the pressure is reduced to a non-oxidizing atmosphere having the same pressure as that of the heating chamber 10 or the thermal storage chamber 34, and the transport unit 30 is moved along the traveling rail L as shown in FIG. Then, the transfer unit 30 is entirely slid toward the heating chamber 10 as indicated by an arrow, and the connecting portion 31 is sealed to the connecting portion 12 of the heating chamber 10. Connect as follows. Thereafter, the connecting portion between the delivery chamber 32 and the heating chamber 10 thus connected by the connecting portion 31 and the connecting portion 12 is decompressed by a decompression device (not shown), and the space S of the connecting portion is The non-oxidizing atmosphere of the same pressure as the delivery chamber 32, the standby chamber 33, and the warming chamber 34 in the heating chamber 10 and the transfer unit 30 is set.

  Next, in the state where the delivery chamber 32 and the standby chamber 33 in the transfer unit 30 and the space S of the connecting portion are in a non-oxidizing atmosphere and pressure, as shown in FIG. 5, the heating chamber 10 is opened and closed. The door 11 and the opening / closing door 35 on the connecting portion 31 side in the delivery chamber 32 are opened, the transfer carriage 41 is moved between the delivery chamber 32 and the heating chamber 10, and the workpiece W is moved into the heating chamber 10. Bring it in.

  Thereafter, as shown in FIG. 6, the open / close door 11 in the heating chamber 10 is closed so that the workpiece W carried into the heating chamber 10 is subjected to heat treatment (for example, vacuum carburization treatment), and After closing the open / close door 35 on the connecting portion 31 side in the delivery chamber 32, the space S in a decompressed state is returned to atmospheric pressure, and the entire transport unit 30 is slid in a direction away from the heating chamber 10, so that the transport unit 30. Is separated from the heating chamber 10.

  Further, if necessary, the transport unit 30 is caused to travel between the carry-in unit 1 and each heating chamber 10 and the above-described operation is repeatedly performed. As shown in FIG. The workpiece W is carried into the chamber 10 and the workpiece W is heat-treated in each heating chamber 10 in a non-oxidizing atmosphere.

  Then, while the workpiece W is being heat-treated in the heating chamber 10 as described above, the transport unit 30 is moved to the position of the carry-in unit 1 and, as shown in FIG. The opening / closing door 35 of the delivery chamber 32 on the part 31 side is opened, and the workpiece W in the carry-in unit 1 is carried into the delivery chamber 32 through the connecting part 31 by the transfer carriage 41.

  Thereafter, as shown in FIG. 8, the workpiece W <b> 1 held on the transfer carriage 41 in the delivery chamber 32 is moved upward by the lifting device 42 and provided on the delivery chamber 32. The standby chamber 33 is made to wait, and the opening / closing door 35 of the delivery chamber 32 on the connecting portion 31 side is closed, and the delivery chamber 32 and the standby chamber 33 in the transfer unit 30 are decompressed by a decompression device, so that the heating chamber 10 and the non-oxidizing atmosphere at the same pressure as the thermal storage chamber 34.

  Then, when the workpiece W2 is appropriately heat-treated in any of the heating chambers 10, as shown in FIG. The workpiece W2 is moved to the position of the heating chamber 10 where the heat treatment is performed, and the entire transport unit 30 is slid toward the heating chamber 10 as in the case shown in FIG. It connects with the connection part 12 of the heating chamber 10 so that it may be sealed, the space S of the connection part of the delivery chamber 32 and the heating chamber 10 is decompressed, and this connection part is said heating chamber 10 or the conveyance unit 30. In the non-oxidizing atmosphere of the same pressure as the delivery chamber 32, the standby chamber 33, and the thermal storage chamber 34.

  Next, in such a non-oxidizing atmosphere, as shown in FIG. 10, the opening / closing door 11 in the heating chamber 10, the opening / closing door 35 on the connecting portion 31 side in the delivery chamber 32, the delivery chamber 32, and the storage chamber 34. The opening / closing door 36 is opened, the transfer carriage 41 is guided from the delivery chamber 32 to the heating chamber 10, and the heat-treated object W2 is held by the transfer carriage 41. In this state, the transfer carriage 41 Is transferred from the heating chamber 10 to the storage chamber 34 through the delivery chamber 32, and the heat-treated object W <b> 2 is carried into the storage chamber 34 by the transfer carriage 41, and then the transfer carriage 41 is transferred to the delivery chamber 32. Try to bring it back.

  In addition, after returning the transfer carriage 41 to the delivery chamber 32 in this way, as shown in FIG. 11, the open / close door 36 between the delivery chamber 32 and the thermal storage room 34 is closed, and the heat-treated object to be processed is obtained. While keeping W2 at a predetermined temperature in the temperature-retaining room 34, the lifting device 42 is lowered, and the workpiece W1 that has been waiting in the standby chamber 33 above the delivery chamber 32 is placed on the transfer carriage 41. The transfer carriage 41 is moved between the delivery chamber 32 and the heating chamber 10, and the workpiece W <b> 1 is carried into the heating chamber 10.

  Thereafter, as shown in FIG. 12, the door 11 in the heating chamber 10 is closed as in the case of FIG. 6, and the workpiece W1 carried into the heating chamber 10 is heat-treated as described above. In addition, after closing the open / close door 35 on the connecting portion 31 side in the delivery chamber 32, the space S in a decompressed state is returned to atmospheric pressure, and the entire transport unit 30 is moved away from the heating chamber 10. The conveyance unit 30 is separated from the heating chamber 10 by sliding.

  And in the state which kept the to-be-processed object W2 heat-processed as mentioned above at the predetermined temperature in the heat retention chamber 34, the conveyance unit 30 spaced apart from the heating chamber 10 is made into the said cooling chamber along the running rail L. After moving to the position 20, the entire transport unit 30 is slid toward the cooling chamber 20 as shown in FIG. 13, and the connecting portion 31 is sealed to the connecting portion 22 of the cooling chamber 20. In this way, the space S of the connecting portion between the delivery chamber 32 and the cooling chamber 20 is depressurized, and this connecting portion is brought into a non-oxidizing atmosphere having the same pressure as the delivery chamber 32 and the like in the cooling chamber 20 and the transfer unit 30. To do.

  Next, as shown in FIG. 14, the opening / closing door 36 between the delivery chamber 32 and the storage chamber 34 is opened, the opening / closing door 35 on the connection portion 31 side in the delivery chamber 32, and the opening / closing door 21 in the cooling chamber 20. And the transfer carriage 41 is moved from the delivery chamber 32 to the temperature-retaining room 34, and the workpiece W2 kept at a predetermined temperature in the temperature-retaining room 34 is held on the transfer position 41. The transfer carriage 41 is moved from the storage room 34 through the delivery chamber 32 to the cooling chamber 20, so that the workpiece W <b> 2 held on the transfer carriage 41 is carried into the cooling chamber 20.

  Next, as shown in FIG. 15, the open / close door 35 between the delivery chamber 32 and the storage chamber 34 is closed, the open / close door 21 in the cooling chamber 20 is closed, and the workpiece W2 carried into the cooling chamber 20 is moved. After immersing in an oil cooler (not shown) and oil cooling to quench the workpiece W2, the closing door 35 on the connecting portion 31 side in the delivery chamber 32 is closed, The space S in the decompressed state is returned to atmospheric pressure, and the entire transport unit 30 is slid in a direction away from the cooling chamber 20 so that the transport unit 30 is separated from the cooling chamber 20. The workpiece W2 after being cooled in the cooling chamber 20 is moved to the next step.

  Thereafter, as shown in FIG. 8 again, the conveyance unit 30 is guided to the position of the carry-in unit 1, and the workpiece W1 carried into the delivery chamber 32 from the carry-in unit 1 is placed on the delivery chamber 32 by the lifting device 42. When the workpiece W2 is heated in the other heating chamber 10, the transfer unit 30 is moved to the position of the heating chamber 10, and the heating unit 10 is moved to the heating chamber 10. The workpiece W2 heated in the chamber 10 is carried from the heating chamber 10 into the warming chamber 34 as described above and kept at a predetermined temperature, while the workpiece W1 waiting in the standby chamber 33 is kept. Is carried into the heating chamber 10 where the heat-treated workpiece W2 is carried out, and then the workpiece W2 kept at a predetermined temperature in the temperature-retaining room 34 is carried into the cooling chamber 20 for cooling. Let this To perform repeat the cormorant Do operation.

  In this way, after the heat-treated object W2 is carried into the temperature-retaining room 34 of the transport unit 30, a new object W1 that is waiting in the standby chamber 33 with respect to the heating chamber 10 is quickly received. In this heating chamber 10, a new workpiece W 1 can be heat-treated. When the new workpiece W 1 is carried into the heating chamber 10, the conveyance unit 30 is brought into the loading section 1. A new workpiece W1 can be carried into the heating chamber 10 as it is without being moved, and the heating chamber 10 after taking out the heated workpiece W2 as compared with the conventional one. On the other hand, it is possible to significantly shorten the time from the introduction of a new workpiece W1 to the heat treatment, and the productivity is remarkably improved.

  Moreover, in the state which made the to-be-processed object W1 carried in from the carrying-in part 1 wait in the waiting chamber 33 as mentioned above, the said connection part 31 is connected to the heating chamber 10, and it is a non-oxidizing atmosphere in the heating chamber 10. In a non-oxidizing atmosphere, the heated workpiece W2 is guided from the connecting portion 31 to the storage chamber 34 via the delivery chamber 32, and the workpiece W1 waiting in the standby chamber 33 is transferred to the delivery chamber 32. Therefore, when a new workpiece W1 is carried into the heating chamber 10, the inside of the transport unit 30 or the connecting portion is made large as in the prior art. There is no need to return to the atmospheric pressure and separate it, or to make a new non-oxidizing atmosphere, and it is possible to further reduce the time for bringing the new workpiece W1 into the heating chamber 10, and heat treatment such as carburizing and quenching. But more So that the rate can be performed well.

  In the heat treatment facility in the above-described embodiment, in the transport unit 30, the warming chamber 34 that keeps the heated workpiece W at a predetermined temperature is connected to the heating chamber 10 or the like via the delivery chamber 32. Although it is provided at a position opposite to the cooling chamber 20, as shown in FIG. 16 and FIG. It can also be provided at a position on the other side. If it does in this way, in the conveyance unit 30, the thermal insulation 34 does not protrude on the opposite side to the heating chamber 10 or the cooling chamber 20, and the conveyance unit 30 is moved between the heating chamber 10 and the cooling chamber 20. Therefore, the heating chamber 10 and the cooling chamber 20 can be provided at positions on both sides in the moving direction of the transport unit 30 via the traveling rail L.

  Further, in the heat treatment facility in the above embodiment, in the transfer unit 30, the standby chamber 33 that waits for the workpiece W carried into the delivery chamber 32 is provided on the delivery chamber 32. As shown in FIGS. 17 and 18, the standby chamber 33 may be provided at a position on the moving direction (direction along the traveling rail L) side of the transfer unit 30 with respect to the delivery chamber 32.

  Further, as shown in FIG. 19, the warm storage chamber 34 is provided at a position on the moving direction side of the transfer unit 30 with respect to the delivery chamber 32, while the standby chamber 33 is provided via the delivery chamber 32. It is also possible to provide it at a position opposite to the heating chamber 10 and the cooling chamber 20.

  Here, when the warming room 34 and the waiting room 33 are provided at a position on the moving direction side of the transfer unit 30 with respect to the delivery chamber 32 as described above, they are carried into the delivery chamber 32 by the transfer carriage 41. In order to transfer the workpiece W between the delivery chamber 32 and the storage chamber 34 or the standby chamber 33, for example, as shown in FIGS. The transfer carriage 41 holding the workpiece W is conveyed by rotating the rotary device 43 in a state where the transfer carriage 41 holding the workpiece W is set on the rotation device 43. It can be made to move to the moving direction of the unit 30, and the to-be-processed object W can be made to transfer between the said delivery chamber 32, the said warm storage chamber 34, and the waiting room 33 by this trolley | bogie 41 for transfer.

  Moreover, in the said embodiment, while providing the opening-and-closing door 35 in the opening part between the connection part 31 of the conveyance unit 30, and the delivery chamber 32, it is in the opening part between the delivery chamber 32 and the said thermal storage 34. Although the opening / closing door 36 is also provided, as shown in FIG. 20, the opening / closing door 35 in the opening between the connecting portion 31 and the delivery chamber 32 is eliminated, and the space between the delivery chamber 32 and the above-described warm storage chamber 34 is eliminated. The opening / closing door 36 may be provided only at the opening.

DESCRIPTION OF SYMBOLS 1 Carry-in part 10 Heating chamber 11 Opening / closing door 12 Connection part 13 Set part 20 Cooling chamber 21 Opening / closing door 22 Connection part 23 Set part 30 Transfer unit 31 Connection part 32 Delivery room 33 Waiting room 34 Warm storage 34a Set part 35, 36 Open / close door 37 Slide base 41 Transfer carriage 42 Lifting device 42a Arm unit 43 Rotating device L Traveling rail S Space of connecting part W, W1, W2

Claims (5)

  A carry-in unit for carrying in the workpiece, a heating chamber for heating the workpiece, and a cooling chamber for cooling the heated workpiece are provided separately, and the carry-in portion, the heating chamber, and the cooling chamber are provided. In the heat treatment equipment provided with a transport unit for transporting the object to be processed carried from the carry-in unit to the heating chamber and conveying the object to be processed heated in the heating chamber to the cooling chamber, A delivery chamber for delivering a workpiece between the carry-in unit, the heating chamber and the cooling chamber, and a standby chamber for waiting for the workpiece carried into the delivery chamber from the carry-in unit; A heat treatment facility characterized in that a heat-retaining room is provided for keeping the object to be processed heated in the heating chamber and carried into the delivery chamber at a predetermined temperature.   2. The heat treatment facility according to claim 1, wherein the standby chamber in the transfer unit is provided above the delivery chamber.   The heat treatment equipment according to claim 1 or 2, wherein a connecting portion for connecting the delivery chamber in the transfer unit in a sealed state to the heating chamber and the cooling chamber is provided, and the object carried from the carry-in portion is provided. In a state where the processing object is kept waiting in the standby chamber, the connecting portion is connected to the heating chamber, and the workpiece heated in the non-oxidizing atmosphere in the heating chamber is connected to the connection in the non-oxidizing atmosphere. The workpiece is guided to the warming chamber via the delivery chamber from the section, and the object to be processed waiting in the standby chamber is carried into the heating chamber from the connection section via the delivery chamber. A connecting part is connected to the cooling chamber, and the object to be processed, which is kept at a predetermined temperature in a non-oxidizing atmosphere in the temperature-retaining room, is transferred to the connecting part via the delivery chamber in a non-oxidizing atmosphere. Leading to the cooling chamber Heat treatment equipment which is characterized.   In the heat treatment facility according to claim 3, each of the heating chamber and the cooling chamber is provided with a hermetic opening / closing door, and when the workpiece is transferred to and from the transfer chamber of the transfer unit, When the workpiece is moved between the delivery chamber and the thermal storage room, a sealing type open / close door is provided between the delivery room and the thermal storage room in the transfer unit. A heat treatment facility characterized by opening and closing the door.   5. The heat treatment facility according to claim 3, wherein a sealed opening / closing door is provided between the connection portion and the delivery chamber, and an object to be processed is provided between the delivery chamber and the heating chamber and the cooling chamber. A heat treatment facility that opens and closes the door when handing over.

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