JP2018044688A - Heat treatment device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To evenly treat a treated object with heat.SOLUTION: A heat treatment device includes: a plurality of heating chambers provided adjacent to an intermediate transportation chamber; and a cooling chamber provided adjacent to the intermediate transportation chamber. The heat treatment device applies prescribed heat treatment to a treated object by moving the treated object between the heating chambers and the cooling chamber via the intermediate transportation chamber. All the heating chambers are arranged so that the treated object has equalized movement distances to the cooling chamber.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a heat treatment apparatus.

  For example, Patent Document 1 discloses a multi-chamber heat treatment apparatus including a plurality of heating chambers and one cooling chamber. In this multi-chamber heat treatment apparatus, an intermediate transfer chamber is formed between the heating chamber and the cooling chamber. The object to be processed heated in the heating chamber is transferred to the cooling chamber via the intermediate transfer chamber. Such a multi-chamber heat treatment apparatus is an apparatus that performs heat treatment and cooling treatment on an object to be processed.

JP 2014-51695 A

  However, in such a multi-chamber heat treatment apparatus, not all the heating chambers are provided at equidistant positions from the intermediate transfer chamber, so that each heating chamber reaches the cooling chamber via the intermediate transfer chamber. The distance of the conveyance path of the workpiece is different. Therefore, the heat history, which is the history of temperature change, varies depending on the conveyance path followed by the object to be processed, resulting in variations in the quality of the heat treatment.

  The present invention has been made in view of the above-described problems, and an object thereof is to uniformize the heat treatment of an object to be processed.

  In order to achieve the above object, in the present invention, as a first solving means related to the heat treatment apparatus, a plurality of heating chambers adjacent to the intermediate transfer chamber and cooling provided adjacent to the intermediate transfer chamber are provided. A multi-chamber heat treatment apparatus that performs a predetermined heat treatment on the workpiece by moving the workpiece between the heating chamber and the cooling chamber via the intermediate transfer chamber, All the heating chambers adopt a means that the moving distances of the workpieces to the cooling chamber are equal.

  In the present invention, as the second solving means relating to the heat treatment apparatus, in the first solving means, a preheating chamber connected to the entrance of the intermediate transfer chamber and preheating the workpiece is provided, and all the heating chambers are provided. Employs a means that the moving distances of the workpieces to the entrance are equal.

  In the present invention, as a third solving means related to the heat treatment apparatus, in the second solving means, the preheating chambers are provided in two rows, and the four preheating chambers arranged at both ends are the above-described ones of the workpiece. A means is adopted in which the moving distances to the entrance are equal.

  In the present invention, as a fourth solving means related to the heat treatment apparatus, in any one of the first to third solving means, a plurality of the cooling chambers are arranged via the intermediate transfer chamber, and all the cooling chambers are arranged. Employs a means that the moving distance from the intermediate transfer chamber is equal.

  According to the present invention, since the moving distance of the workpiece to the cooling chamber is the same for all the heating chambers, the cooling history after heating can be made uniform for the workpieces heated in all the heating chambers. Therefore, according to the present invention, it is possible to make the heat treatment on the object to be processed uniform regardless of which heating chamber is heated.

1 is a plan view of a multi-chamber heat treatment apparatus S according to an embodiment of the present invention. 1 is a side view of a multi-chamber heat treatment apparatus S according to an embodiment of the present invention. It is a schematic diagram which shows the positional relationship and conveyance path | route of each apparatus etc. in the plane of the multi-chamber type heat processing apparatus S which concerns on one Embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
The multi-chamber heat treatment apparatus S according to the present embodiment uses various metal parts X as objects to be processed, and heats and cools the metal parts X to heat-treat the metal parts X (objects to be processed). It is a heat treatment apparatus to be applied. As shown in FIG. 1, the multi-chamber heat treatment apparatus S includes a first transfer device 1, eight preheating devices 2, an intermediate transfer device 3, four heating devices 4, a gas cooling device 5, and a second transfer device 6. It is provided as a component device.

  Among various devices constituting such a multi-chamber heat treatment device S, the intermediate transfer device 3, the four heating devices 4, and the gas cooling device 5 constitute a main body H of the multi-chamber heat treatment device S. That is, the multi-chamber heat treatment apparatus S according to the present embodiment is a combination of the first transport device 1, the eight preheating devices 2, and the second transport device 6 with the main body H that is a basic component.

  The 1st conveyance apparatus 1 is a conveyance apparatus provided with a roller conveyor mechanism, and conveys the metal component X received from the outside to each preheating apparatus 2 when a conveyance roller rotates. The first transfer apparatus 1 has a linear transfer chamber (first transfer chamber) whose internal space is linear, and has a predetermined shape for heat treatment, for example, by a plurality of transfer rollers arranged linearly at regular intervals on the bottom. The metal part X stored in the container is transported.

  One end of the first transfer device 1 is provided with a carry-in port 1a for accommodating the metal part X in the first transfer chamber. The metal part X is accommodated in the first transfer chamber from the carry-in entrance 1a, is conveyed linearly along the first transfer chamber, and is discharged to the intermediate transfer device 3 from the exit 1b. As shown in the drawing, the outlet 1b is provided on the side of the first transfer device 1 where the intermediate transfer device 3 is provided, and at an intermediate position between the two preheating devices 2 at both ends in the length direction of the first transfer device 1. It has been.

  The eight preheating devices 2 are provided on both sides of the first transfer device 1, and the metal parts X are accommodated in the internal space (preheating chamber) and preheated. This pre-heat treatment is performed prior to the heat treatment (main heat treatment) in the heating device 4, and the metal part X is heated to a temperature lower than that of the main heat treatment. In the present embodiment, as shown in FIG. 1, six preheating devices 2 are equally spaced on one side of the first transfer device 1, that is, on the opposite side of the first transfer device 1 from the side where the intermediate transfer device 3 is provided. The remaining two preheating devices 2 are provided on the other side of the first transfer device 1, that is, on the side where the intermediate transfer device 3 is provided in the first transfer device 1.

  The intermediate transfer device 3 is a transfer device including a roller conveyor mechanism, and includes an internal space (intermediate transfer chamber) communicating with the first transfer chamber described above. The intermediate transport device 3 transports the metal part X between the inlet 3a, the heating device 4, and the gas cooling device 5 by rotating the transport roller. Such an intermediate transfer device 3 has a square outer shape as shown in the figure, and a relay station 3b is provided at a location located at the center point of the outer shape (the center point of the intermediate transfer chamber). Further, the inlet 3a faces the outlet 1b of the first transport device 1 described above, and is perpendicular to one side of the square intermediate transport device 3 (side facing the first transport device 1) and the center of the one side. It is provided in the extended position.

  As shown in FIG. 2, such an intermediate conveyance device 3 is provided below the heating device 4, conveys the metal part X carried from the inlet 3 a to a position directly below the heating device 4, and at the same time, the heating device 4. The metal part X that has been moved immediately below the heating device 4 after the heat treatment is completed is conveyed to the gas cooling device 5 adjacent to the side.

  The four heating devices 4 are adjacent to the upper side of the intermediate transfer device 3 and are provided at the same distance from the center of the square intermediate transfer chamber, that is, the relay station 3b, immediately above the intermediate transfer device 3. Such a heating device 4 accommodates the metal part X conveyed immediately below via the relay station 3b in an internal space (heating chamber), and heats the metal part X in the heating chamber (main heating process). Apply. Each of the heating devices 4 is provided with a lifting device, and by using the lifting device, the metal component X located immediately below in the intermediate transfer chamber is accommodated in the heating chamber, or the metal component X in the heating chamber is accommodated. Move directly under the intermediate transfer chamber.

  The gas cooling device 5 is provided adjacent to the side of the intermediate transfer device 3. The gas cooling device 5 includes a cooling chamber 5a and a circulation chamber 5b, and performs a cooling process on the metal part X heated by the heating device 4. The cooling chamber 5a is provided with a cooling chamber that accommodates the metal part X. As shown in FIG. 1, the other side (first transport device 1) parallel to one side where the inlet 3a is provided in the square intermediate transport device 3 is provided. And a side extending vertically from the center of the other side.

  The circulation chamber 5b includes a circulation space that allows the upper and lower portions of the cooling chamber 5a to communicate with each other outside the cooling chamber 5a. The circulation chamber 5b supplies a cooling gas to the cooling chamber 5a from above and collects a cooling gas (heated cooling gas heated by the metal component X) that has contributed to cooling the metal component X from below, and is used as a heat exchanger. Is used to cool the heated and cooled gas to the initial temperature and supply the cooling chamber 5a from above.

  An opening / closing door (not shown) for partitioning the intermediate transfer chamber and the cooling chamber is provided at the inlet (cooling chamber inlet) of the cooling chamber 5a. A discharge door 5c (cooling chamber outlet) for discharging the metal part X is provided at a position facing the cooling chamber inlet in the cooling chamber 5a. The metal part X accommodated in the cooling chamber from the cooling chamber inlet and cooled to the predetermined temperature by the cooling gas is carried out from the cooling chamber outlet by the second transfer device 6.

  The 2nd conveyance apparatus 6 is a conveyance apparatus provided with a roller conveyor mechanism, and internal space is a conveyance chamber (2nd conveyance chamber) connected to the said cooling chamber. The second transfer device 6 is provided with a carry-out port 6a at one end, and carries the metal part X carried from the gas cooling device 5 (cooling chamber) to the carry-out port 6a. A plurality of standby stations for temporarily waiting for the metal part X are provided on both sides of the second transfer device 6.

  That is, the second transport device 6 moves the metal part X that has been heat-treated by passing through any one of the eight preheating devices 2, any of the four heating devices 4, and the gas cooling device 5 to the carry-out port 6 a. This makes it possible to carry it out to the outside. Note that the metal part X at the carry-out port 6a is transferred to a transport carriage or the like by a transfer device (not shown) and is carried out to the outside.

  In the multi-chamber heat treatment apparatus S configured as described above, the eight preheating chambers connected to the first transfer chamber are heated by four by connecting the outlet of the first transfer chamber to the inlet of the intermediate transfer chamber. The intermediate transfer chamber is connected to the chamber and the cooling chamber. In FIG. 3, the positions of the preheating chamber, the heating chamber, and the cooling chamber are indicated by black circles and the symbols of the various devices described above, and the metal part X (processed object) between the preheating chamber, the heating chamber, the cooling chamber, and the like. ) Is shown as a line connecting the black circles. First, the main body H will be described. As shown in FIG. 3, the moving distance of the metal part X between the relay station 3 b of the intermediate transfer device 3 and each heating device 4 is the same distance L1 for all the heating devices 4. Is set.

  Moreover, about the two preheating apparatuses 2 located in the other side of the two preheating apparatuses 2 and the 1st conveying apparatus 1 which are located in the both ends by the one side of the 1st conveying apparatus 1 among the eight preheating apparatuses 2, The outlet 1b of the first transport device 1 is provided so as to be an equal distance L2 from the two preheating devices 2 at both ends in the length direction of the first transport device 1. That is, with respect to the four preheating devices 2, the moving distance of the metal part X to the outlet 1 b of the first conveying device 1 is equal, and therefore, the moving distance to the heating device 4 is the same for any of the four heating devices 4.

  In the multi-chamber heat treatment apparatus S according to the present embodiment, various devices include a control device (not shown), and the metal component X is subjected to a desired heat treatment by being controlled uniformly by the control device. This control device is provided with an operation panel using a touch panel or the like, conditions relating to functions performed by various devices, for example, preheating conditions such as preheating temperature and preheating time in the preheating device 2, heating temperature and heating time in the heating device 4, and the like. These heating conditions and the cooling heat conditions such as the cooling temperature and cooling time in the gas cooling device 5 can be set as appropriate.

Next, the operation of the multi-chamber heat treatment apparatus S configured as described above will be described.
When the metal part X is subjected to heat treatment by the multi-chamber heat treatment apparatus S, the metal part X is sequentially supplied from the transfer port 1a of the first transfer apparatus 1 into the first transfer chamber by an external transfer apparatus (not shown). The metal parts X are sequentially transported to the empty preheating device 2 by the first transport device 1, and are preheated to a predetermined preheating temperature in the preheating device 2. Then, the metal part X that has reached the preheating temperature in the preheating device 2 is conveyed from the preheating device 2 to the outlet 1b by the first conveying device 1, and passes through the outlet 1b and the inlet 3a of the intermediate conveying device 3 to the intermediate conveying chamber. It is conveyed to.

  The metal part X thus moved to the vicinity of the entrance 3a in the intermediate transfer chamber is transferred to the relay station 3b by the intermediate transfer device 3, and further transferred from the relay station 3b to just below the empty heating device 4. The Then, the metal part X transported immediately below the heating device 4 in the intermediate transport chamber is transported into the heating chamber by the lifting device of the heating device 4 and heated to a predetermined heating temperature. Then, the metal part X that has reached the heating temperature is transported to the position immediately below the heating device 4 in the intermediate transport chamber by the lifting device, and further transported to the relay station 3b by the intermediate transport device 3.

  Here, the multi-chamber heat treatment apparatus S is provided with eight preheating apparatuses 2, and the first transfer apparatus 1 empties the metal part X (object to be processed) carried in from the carry-in entrance 1 a. Pre-heat treatment is sequentially started by sequentially transporting to the pre-heating device 2. Therefore, a plurality of metal parts X (objects to be processed) are preheated simultaneously by the plurality of preheating devices 2.

  Further, the multi-chamber heat treatment apparatus S is provided with four heating devices 4, and the intermediate transfer device 3 receives the metal part X (preheated workpiece) carried into the intermediate transfer chamber from the inlet 3a. The main heating process is sequentially started by sequentially transporting to the empty heating device 4. Accordingly, the plurality of metal parts X (objects to be processed) are subjected to the main heat treatment in parallel by the plurality of heating devices 4.

  In such a multi-chamber heat treatment apparatus S, the preheating apparatus 2 performs the preheating process prior to the main heating process by the heating apparatus 4, that is, the metal part X is preheated to a predetermined preheating temperature. The time for the main heat treatment (main heat time) can be shortened. That is, in the multi-chamber heat treatment apparatus S, it is possible to shorten the processing time (tact time) required for the heat treatment.

  Then, the metal part X on the relay station 3b is transferred by the intermediate transfer device 3 into the cooling chamber 5a, that is, to the cooling chamber. The metal part X is cooled along a predetermined cooling history by the cooling gas circulating in the cooling chamber 5a and the circulation chamber 5b in the cooling chamber. Then, the metal part X that has been cooled in the cooling chamber is transported by the second transport device 6 from the carry-out door 5c of the gas cooling device 5 (cooling chamber 5a) to the second transport chamber of the second transport device 6. It is conveyed through the second conveyance chamber to the carry-out port 6a.

  In such a multi-chamber heat treatment apparatus S according to this embodiment, the movement distance of the metal part X from the heating apparatus 4 to the gas cooling apparatus 5 is set to be equal for all the heating apparatuses 4. The metal part X subjected to the main heat treatment by any of the four heating devices 4 is conveyed to the gas cooling device 5 (cooling chamber 5a) through the same moving distance and subjected to the cooling treatment. Therefore, the cooling state while being conveyed from the heating device 4 to the gas cooling device 5 is uniform for all the heating devices 4.

  According to such a multi-chamber heat treatment apparatus S according to the present embodiment, it is possible to make the cooling history in the heat treatment of the metal part X uniform regardless of which of the four heating apparatuses 4 performs the main heat treatment. Therefore, the heat treatment for the metal part X (object to be processed) can be made uniform regardless of which heating chamber is used. Further, according to the multi-chamber heat treatment apparatus S according to the present embodiment, since the moving distance of the metal part X is the same for all the heating apparatuses 4, the tact time relating to the heat treatment can be made uniform for all the heating apparatuses 4. It is.

  Further, in the multi-chamber heat treatment apparatus S according to the present embodiment, the moving distance of the metal part X from the inlet 3a of the intermediate transfer apparatus 3 to the heating apparatus 4 is set to be equal for all the heating apparatuses 4. According to the multi-chamber heat treatment apparatus S according to the present embodiment, the cooling that is received when transported from the inlet 3a of the metal part X preheated by any preheating apparatus 2 to the heating apparatus 4 is performed for all the heating apparatuses 4. It is uniform. Therefore, according to the multi-chamber heat treatment apparatus S according to the present embodiment, the heat treatment for the metal part X (object to be processed) can be made uniform.

  In the multi-chamber heat treatment apparatus S according to this embodiment, among the eight preheating apparatuses 2, the two preheating apparatuses 2 located at both ends on one side of the first conveying apparatus 1 and the other of the first conveying apparatus 1. As for the two preheating devices 2 located on the side, the movement distance of the metal part X to the outlet 1b of the first transfer device 1 is equal, so that the cooling received during the movement to the outlet 1b is uniform. Therefore, according to the multi-chamber heat treatment apparatus S according to the present embodiment, the heat treatment for the metal part X (object to be processed) can be made uniform.

  Furthermore, in the multi-chamber heat treatment apparatus S according to the present embodiment, a roller conveyor mechanism is adopted as a transport system for the first transport apparatus 1, the intermediate transport apparatus 3, and the second transport apparatus 6. Therefore, it is possible to reduce the size of the first transfer device 1, the intermediate transfer device 3, and the second transfer device 6 as compared with the case of using the conventional hydraulic pusher mechanism. Space saving can be realized.

In addition, this invention is not limited to the said embodiment, For example, the following modifications can be considered.
(1) In the above embodiment, the multi-chamber heat treatment apparatus S is configured by combining the main body H with the first transport apparatus 1, the eight preheating apparatuses 2, and the second transport apparatus 6, but the present invention is limited to this. Not. When pre-heat treatment is not necessary, a multi-chamber heat treatment apparatus may be configured by only the main body H, for example.

(2) Although the single gas cooling device 5 is provided in the above embodiment, the present invention is not limited to this. For example, the second cooling device may be provided below the intermediate transfer device 3, for example, directly below the relay station 3b. As the second cooling device, for example, a mist cooling device or an immersion cooling device can be employed. In this case, a plurality of cooling chambers are arranged via the intermediate transfer chamber. However, since the moving distance of the metal parts X is the same for all the gas cooling apparatuses 5 in the second cooling device, the metal parts X The heat treatment for (the object to be processed) can be made uniform.

(3) Instead of the gas cooling device 5, a mist cooling device or an immersion cooling device may be adopted. The gas cooling device 5 has a cooling efficiency lower than that of a mist cooling device using a mist such as water as a refrigerant or an immersion cooling device using a liquid such as oil as a refrigerant because the cooling gas (gas) is used as a refrigerant. Therefore, when a higher cooling efficiency is required, a mist cooling device or an immersion cooling device may be used instead of the gas cooling device 5.

(4) In the above-described embodiment, the configuration in which the plurality of preheating devices 2 are linearly arranged along the first transfer device 1 is employed, but the present invention is not limited to this. For example, a relay station similar to the relay station 3b of the intermediate transport device 3 may be provided in the first transport device 1, and the preheating device 2 may be disposed at a radial and equidistant position from the relay station. In this case, since all the moving distances to the respective heating devices 4 are equal for all the preheating devices 2, the heating history of the metal part X (object to be processed) can be equalized. Further, the number of preheating devices 2 is not limited to eight, and may be one extremely.

(5) In the above embodiment, the configuration including four heating devices 4 is adopted, but the present invention is not limited to this. For example, when three heating devices 4 are provided, it is conceivable that the heating device 4 is arranged at each vertex of the equilateral triangle and the relay station 3b is arranged at the center of the equilateral triangle. When five heating devices 4 are provided, it is conceivable that the heating device 4 is arranged at each apex of the regular pentagon and the relay station 3b is arranged at the center of the regular pentagon.

(6) In the above embodiment, the roller conveyor mechanism is adopted as the transport method of the first transport device 1, the intermediate transport device 3, and the second transport device 6, but the present invention is not limited to this. The first transport device 1, the intermediate transport device 3, and the second transport device 6 can adopt a forklift as a transport method.

S Multi-chamber heat treatment equipment (heat treatment equipment)
H Body X Metal parts (objects to be processed)
DESCRIPTION OF SYMBOLS 1 1st conveyance apparatus 1a Carry-in inlet 1b Outlet 2 Preheating apparatus 3 Intermediate conveyance apparatus 3a Inlet 3b Relay station 4 Heating apparatus 5 Gas cooling apparatus 5a Cooling chamber 5b Circulation chamber 5c Unloading door 6 2nd conveyance apparatus 6a Carry-out exit

Claims (4)

A plurality of heating chambers provided adjacent to the intermediate transfer chamber; and a cooling chamber provided adjacent to the intermediate transfer chamber, wherein the workpiece is passed through the intermediate transfer chamber and the heating chamber and the cooling chamber. A heat treatment apparatus for performing a predetermined heat treatment on the workpiece by moving between chambers,
All the heating chambers are arranged so that the moving distances of the workpieces to the cooling chamber are equal. A preheating chamber connected to the inlet of the intermediate transfer chamber and preheating the workpiece;
The heat treatment apparatus according to claim 1, wherein all the heating chambers are arranged so that the moving distances of the workpieces to the entrance are equal. The preheating chamber is provided in two rows,
3. The heat treatment apparatus according to claim 2, wherein the four preheating chambers arranged at both ends are arranged so that respective moving distances of the workpiece to the inlet are equal. A plurality of the cooling chambers are arranged via the intermediate transfer chamber,
All the said cooling chambers are arrange | positioned so that the movement distance from the said intermediate conveyance chamber may become equal, The heat processing apparatus as described in any one of Claims 1-3 characterized by the above-mentioned.

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