JPS6226486A - Hot isotropic pressure press device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is directed to a hot isostatic press (Hot 1sostat press).
icP ress0 below, abbreviated as r) TIPJ. )
It is related to the device.

The apparatus of the present invention is capable of: (a) consolidation and pressure sintering of powder in powder metallurgy and fine ceramics, (b) defect removal of sintered crystals of metal powders and fine ceramics, metal castings, forged products, etc., (c) ) Diffusion bonding of similar and dissimilar materials, (d) Wound treatment in composite materials, etc.

[Prior Art] FIGS. 6 and 7 show examples of the most common conventional HIP devices.

In the figure, reference numeral 1 denotes a pressure vessel, in which a heating furnace (not shown) covered by a heat insulating hood is provided. The pressure vessel l consists of a cylindrical vessel body 2, an upper M3, a bottom ring 4 fixed to the inner periphery of the lower end of the cylindrical vessel body 2, and a lower lid 5 that fits into the bottom ring 4, and the material to be treated is: It is placed on the lower lid 5 which opens and closes the opening at the lower end of the pressure vessel l, and is loaded and unloaded by the charging cylinder 6. The pressure vessel l is
When sealed, the upper M3
And the lower lid 5 is pressed and held so as to withstand high pressure. Therefore, the yoke 7 can move forward as shown by the arrow (A) from the illustrated position.

In this) IIP apparatus, preparation of the material to be processed (preheating) - charging of the material into the pressure vessel 1 - vacuum in the pressure vessel 1 - gas replacement - pressure increase - heating and temperature rise - maintenance of temperature and pressure - cooling - gas Recovery - Depressurization - Opening the pressure vessel 1 to the atmosphere - Removal of the material to be treated,
The operation is carried out with 1 cycle, and the cooling step, which needs to be carried out under an inert gas atmosphere, is carried out in a heating furnace inside the pressure vessel 1. FIG. 9 shows the cycle time in this device.

Further, FIG. 8 shows an example of another HIP device.

This apparatus is characterized in that the material to be treated is taken out of the pressure vessel i while it is still hot, and cooling is performed outside the pressure vessel 1, thereby increasing the number of times the pressure vessel 1 is used. In other words, this device performs gas recovery and depressurization immediately after the I-I I P treatment, and when the pressure drops to atmospheric pressure, the material to be treated is immediately taken out of the pressure vessel 1, including the heating furnace covered with an insulating hood, and cooled. After being transferred to chamber 8, cooling is performed inside the chamber, and after the material to be treated is taken out from pressure vessel l,
Multiple heating furnaces are installed so that HIP can continue to operate.

FIG. 10 shows the cycle time in this device. As can be seen from this figure, the usage time of the pressure vessel is shortened, and the next cycle can be started immediately after the material to be treated is taken out.

[Problems to be Solved by the Invention] Among the above HIP devices, the former device has the following problems.

The pressure vessel is water-cooled, making it easy to dissipate heat to the outside, but since the material to be treated is cooled inside the pressure vessel via a heating furnace and an insulating hood, it is extremely difficult to cool down, as shown in Figure 9. It takes a long time to cool down. Therefore, according to this device, one cycle can be as short as 8 hours, or as long as two days and nights, resulting in high operating costs.

Furthermore, the latter device has the following problems.

Equipment costs are high because multiple heating furnaces must be prepared. Furthermore, since the entire heating furnace is placed in the cooling chamber, the cooling time of the cows in the former apparatus is not significantly shortened because they are cooled in an insulated hood. Oxidation of the constituent materials of the heating furnace and the materials to be treated will result in quality deterioration and functional decline.
It is necessary to devise ways to prevent this.

In view of the above circumstances, the present invention enables the material to be treated to be directly cooled by taking it out of the pressure vessel naked while still at high temperature.
The purpose of this is to shorten the usage time of the pressure vessel per cycle, increase the number of times the HIP equipment is operated per day, and reduce operating costs.

[Means for Solving the Problems] The present invention solves the above-mentioned problems by opening the lid provided at the opening of the pressure vessel to take in and out the material to be treated. A main body of the apparatus for hot isostatic pressing the material to be processed, three chambers A, B, and C connected in series arranged in relation to the main body of the apparatus, and a chamber A between these chambers and at the end. Each room A, B, C is provided between C and the outside.
a seal door that keeps the airtight airtight; a seal cylinder that is appropriately placed between the central chamber B and the pressure vessel and that airtightly connects the opening of the chamber B and the pressure vessel; and between each of the chambers and the outside. a transport device for transporting the material to be processed in the chamber A;
a preheating chamber for preheating the processed material to be charged into the main body of the apparatus;
The chamber B is a charging chamber equipped with a mechanism for loading the material to be processed into the apparatus main body, and the chamber C is a cooling chamber for cooling the material after being processed in the apparatus main body. .

[Effect] A case in which the apparatus having the above configuration is operated will be explained.

After the HIP treatment of the material to be processed is completed in the pressure vessel, a seal cylinder is placed between the opening of the pressure vessel and charging chamber B to provide airtight communication between the two, and a seal cylinder is placed between the opening of the pressure vessel and charging chamber B. Close the seal door between side chambers A and C, and replace gas in charging chamber B and the inside of the seal cylinder.

In this state, the lid of the pressure vessel is opened and the raw material to be treated is taken out into the charging chamber B. Here, the cooling chamber C is kept airtight with the seal door closed in advance and gas replacement is performed.

Then, the seal door between charging chamber B and cooling chamber C is opened, the material to be processed taken out into charging chamber B is put into cooling chamber C, the seal door is closed, and the material to be processed is placed in cooling chamber C. The treated material is directly cooled in its bare state. At this point, the pressure vessel is released for the next cycle of operation.

In the next cycle, in parallel with the above steps, the preheating chamber A
The process begins by closing the seal door of the population outlet and preheating the chamber A for charging.

The material to be processed that has been preheated in the preheating chamber A is transferred into the charging chamber B by opening the seal door between the preheating chamber A and the charging chamber 8, while gas has been replaced in the charging chamber B and the seal cylinder. put in. Then, close the seal door, charge the material to be treated into the pressure vessel using the charging mechanism, close the lid of the pressure vessel, remove the seal cylinder, and press the HI
Start P processing.

By operating in this way, (1) the usage time of the pressure vessel per cycle is shortened, and the number of times the pressure vessel is used is increased.

[Example] Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 5.

FIG. 1 is a side sectional view of the HIP apparatus of the embodiment, FIG. 2 is a plan view thereof, and FIG. 3 is a side sectional view showing details of the pressure vessel.

What is indicated by lO in the figure is the main body of the HIP device, which is
Like the conventional one, it is composed of a pressure vessel 1, a yoke 7, a yoke moving cart 11, and a pedestal 12.

As shown in FIG. 3, the pressure vessel 1 includes a cylindrical vessel body 2, an upper lid 3, a bottom ring 4 fixed to the inner periphery of the lower end of the cylindrical vessel body 2 and having a flange 4a, and a bottom ring 4.
A heating furnace 14 covered with a heat insulating hood 13 is provided inside the pressure/force vessel 1, and a heater 15 is provided inside the heating furnace 14.

In this HIF apparatus main body 10, when the lower lid 5 is opened to take in and take out the material W to be processed, and when the pressure vessel 31 is closed to perform HIP processing, the yoke 7 is advanced to the position of the pressure vessel l, By pressing the upper M3 and lower M5 with the yoke 7, the pressure vessel 1 is held so as to withstand high pressure.

Three airtight chambers A, B, and C are connected in series and arranged below the apparatus main body IO having such a configuration. Chamber A is a preheating chamber for preheating the material to be processed to be charged into the apparatus main body 10, chamber B is a charging chamber for charging the material to be processed into the apparatus main body 10, and chamber C is a processing chamber in the apparatus main body 10. Each chamber is configured to function as a cooling chamber to cool down the processed material.

The central charging chamber B is located just below the pressure vessel 1, and the lower part of the charging chamber B has a chamber so that the material to be treated can be charged into the pressure vessel 2 while remaining on the lower M5. A charging cylinder I6 is provided.

Between these chambers A and B, between chambers B and C, and between chambers A and C at the ends.
There is a room A between each room and the outside.

Side sliding seal door 17 to keep the ESC airtight
．． 18, 19, and 20 are provided.

In addition, in the opening 21 formed at the top of the central chamber B,
A seal cylinder 22 is airtightly attached so as to be able to move up and down. When this seal cylinder 22 is raised, its upper end contacts the lower surface of the flange 4a of the bottom ring 4 of the pressure vessel I via the seal member 23, as shown in the figure, and thereby the opening of the pressure vessel 1 and the The entrance B is airtightly connected, and in that state, the lower cover 5 can be opened and lowered. Further, it does not prevent the yoke 7 from being advanced to the position of the pressure vessel 1 with the seal cylinder 22 being lowered. In the figure, the lifting device for the seal cylinder 22 is omitted.

In addition, conveying devices 24, 25, 26, 27 are provided inside each of the preheating chambers A1 and cooling chamber C, and outside of the preheating chamber A and cooling chamber C, respectively, for transferring the material to be processed. Materials to be processed can be transferred between A and B, between chambers B and C, between chambers and the outside, and between chamber C and the outside.

Next, the operation of the HIF device having the above configuration will be described with reference to the flowchart shown in FIG. 4.

The flow of one material to be treated during continuous operation will be explained.

<Preheating chamber A> (1) First, open the seal door 19 on the population side of the preheating chamber A. At this time, the seal door 17 on the exit side of the preheating chamber A is closed.

(2) The material to be processed is transferred into the preheating chamber A by the transfer device 26 located outside the preheating chamber A.

(3) Close the seal door 19 on the entrance side of the preheating chamber A to keep the inside of the preheating chamber A airtight.

(4) The inside of the preheating chamber A is evacuated and replaced with gas.

Then, the material to be treated is heated in the preheating chamber A to perform necessary preheating on the charging surface.

(5) Open the seal door 17 on the exit side of the preheating chamber A. At this time, the HIP device main body 10 and charging chamber 13 are in the stage (20) described later.

(6) The transfer device 24 in the preheating chamber A transfers the material to be processed in the preheating chamber A to the charging chamber B+, and transfers the material to be processed in the preheating chamber A to the charging chamber B. Place the material to be treated on top.

(7) Close the seal door 17 on the exit side of the preheating chamber A.

Charging chamber B-HIP equipment main body 10> (8) Charging: By operating the cylinder I6, the lower lid 5 is raised, and the material to be treated on the lower lid 5 is transferred into the pressure vessel l of the HIP equipment main body lO. and close the lower lid 5.

(9) The rod of the charging cylinder 16 and the seal cylinder 22 are lowered so that the yoke 7 can move forward.

(10) Move the yoke 7 forward to the position of the pressure vessel 1, and press the upper M3 and lower lid 5 to withstand high pressure.

(11) The inside of the pressure vessel 1 is evacuated and replaced with gas.

(I2) Increase the pressure and temperature inside the pressure vessel I, and
The gas inside is maintained at high pressure and high temperature to perform HIP processing.

(13) After the HIP process within the pressure vessel 1 is completed, the gas pressure within the pressure vessel I is reduced and gas recovery is performed.

(14) After that, the yoke 7 is retreated to the standby position shown in the figure.

(15) The seal cylinder 22 is raised to airtightly communicate the opening of the pressure vessel I and the charging chamber B, and the charging cylinder 16 is operated to raise the rod.

(16) The inside of the charging chamber B1 seal cylinder 22 is evacuated and replaced with gas.

(17) Open the lower lid 5 and use the charging cylinder 16 to
The material to be treated with the IP treatment is lowered while being placed on the
The raw material to be treated is taken out from the pressure vessel I into the charging chamber B. At this time, the seal doors 18 and 20 of the cooling chamber C are closed, and the inside is in a state where the gas is replaced.

(18) Open the seal door 18 on the artificial side of the cooling chamber C.

(I9) The material to be processed taken out into the charging chamber B is transferred into the cooling chamber C by the transfer device 25 in the cooling chamber C.

(20) Close the seal door [8] on the inlet side of cooling chamber C.

Cooling Chamber C> (21) In the cooling chamber C, the bare material to be treated is directly cooled. At this point, pressure vessel I and charging chamber B are released for the next cycle of operation.

(22) When cooling is completed in the cooling chamber C, the seal door 20 on the exit side of the cooling chamber C is opened.

(23) The material to be processed is transferred to the outside by the transfer device 27 outside the cooling chamber C.

(24) Close the seal door 20 on the exit side of the cooling chamber C.

This completes the operation cycle for one material to be processed, but this HIP apparatus can sequentially and continuously process a plurality of materials to be processed while maintaining a step shift back and forth.

For example, when the previous processed material is being cooled in the cooling chamber C, the next processed material can be subjected to HIF treatment in the pressure vessel 1, and in the preheating chamber A, the next processed material is further preheated. Able to perform work. For this reason,) the ITP equipment body
The usage time of O per cycle is shortened, and extremely efficient operation is realized.

In addition, in the above HIP apparatus, since the bare material to be processed is directly cooled in the cooling chamber C, the cooling rate is extremely fast, and the processing time for one material to be processed is shortened. . This can be clearly understood from the cycle time shown in FIG.

Next, we will discuss some details that were not mentioned in the above explanation.

In the above HIP apparatus, the material to be treated is
If the material a is placed on the upper layer of the heat insulating pallet 28 (see Fig. 3), transportation can be carried out easily, and the heat of the material to be processed can damage the lower lid 5 and the transport device. The advantage is that there is no fear.

In addition, a water cooling jacket is provided inside the seal cylinder 22,
By cooling the seal tube 22 with water, damage to the seal tube 22 itself can be reduced.

Further, the seal cylinder 22 can be configured as a bellows-like member that is expandable and retractable, but in such a case, if a heat insulating material is provided inside, the temperature rise of the seal cylinder can be suppressed.

Furthermore, in the Hr P apparatus described above, since the hot material to be processed is taken out from the pressure vessel in its naked state, the bottom ring or the vicinity of the gas introduction hole and the discharge hole of the pressure vessel are exposed to high temperatures. Therefore, it is desirable to water-cool the bottom ring, the gas introduction hole, and the discharge hole of the pressure vessel.

Furthermore, it is desirable to optionally perform additional configurations such as applying a heat insulating material to the seal door, cooling the seal door with water, or installing a cooling heat exchanger or a cooling fan in the cooling chamber. .

In addition, in the description of the above embodiment, the case where one material to be treated is processed in each of the cooling chamber C and the preheating chamber A has been described.
A plurality of them may be processed simultaneously.

Further, in the above embodiment, only one cooling chamber C and one preheating chamber A are provided, but a plurality of cooling chambers may be provided as necessary. In particular, since cooling takes time, it is better to provide a plurality of them.

In that case, arranging the cooling chambers in series so that cooling is performed in stages starting from the previous chamber is advantageous not only in terms of cooling efficiency but also in terms of equipment costs.

Furthermore, in the above embodiments, the lower cover of the pressure vessel is opened to take in and take out the material to be treated, but the present invention is not limited to this, and the present invention is also applicable to a type of pressure vessel in which the material to be treated is taken in and taken out from above. It can be applied to any type of item, such as items that can be put in and taken out from the side.

Furthermore, although the above embodiments show the case of a HIP device equipped with a yoke, the present invention can also be applied to a device without a yoke type.

[Effects of the Invention] As described above, according to the present invention, the following effects can be obtained.

■Set the seal cylinder in the designated place, replace the gas inside the seal cylinder and the charging chamber, and open the lid of the pressure vessel to remove the material to be treated while the seal cylinder and charging chamber are airtightly isolated from the outside. It can be taken out of the pressure vessel naked while still hot.

Then, by placing the bare material to be processed into a cooling chamber in which gas has been replaced, the material to be processed can be directly cooled. Further, the next material to be treated can be charged into the empty pressure vessel from the preheating chamber side. Therefore, the pressure vessel can be fully utilized.

As mentioned in 2), since the material to be treated can be cooled in its naked state, the cooling time can be shortened, and the time for which the pressure vessel is used per cycle can be shortened. Therefore, it is possible to increase the number of times the Hl, P device is operated per day, and it is possible to reduce operating costs.

As mentioned in ``■■'', since it can be taken outside naked and cooled, only one heating furnace installed in the pressure vessel is sufficient. Therefore, compared to the conventional external cooling type, the number of heating furnaces is reduced, and equipment costs can be reduced.

(2) Since there is no need to expose the material to be treated or the heating furnace to the outside air at high temperatures, there is no problem of oxidation of the material to be treated, and there is no damage to the heating furnace.

[Brief explanation of the drawing]

Figures 1 to 5 are for explaining one embodiment of the present invention, in which Figure 1 is a side sectional view of the HIP device, Figure 2 is a plan view of the same, and Figure 3 is the pressure in the HIP device. A side sectional view of the container, Figure 4 is an operational flow diagram of the HIP device, and Figure 5 is the same HIP device.
It is a figure showing the operation cycle time of an IP device. 6 to 10 are for explaining the conventional HIP device. FIG. 6 is a side sectional view showing an example of the HIP device, FIG. 7 is a plan view of the same, and FIG. is a side sectional view showing another HIP device, and FIG. 9 is a side sectional view showing another HIP device, and FIG.
A diagram showing the operation cycle time in the P device, Figure 1O is shown in FIG. 8) (A diagram showing the operation cycle time in the IPP device. 1... Pressure vessel, 5...・Lower lid, 7...
... Yoke, 10 ... HIP device body,
16...Charging cylinder, 17-20...
・Seal door, 22...Seal door, 24-27・
...Transfer device, A...Preheating chamber, B...
...Charging room, C...Cooling room. Applicant Ishikawajima-Harima Heavy Industries Co., Ltd. Figure 2 Figure 3 Figure 4 Figure 5 Time (Hr) Figure 9 Figure 10 Image rFl (Hr)

Claims (1)

[Claims] A device body for hot isostatic pressing the material to be processed in the pressure vessel by opening a lid provided at the opening of the pressure vessel to take in and take out the material to be processed; Three chambers A, B, and C connected in series, and each chamber A, B, and C provided between each chamber and between the end chambers A, C and the outside.
a seal door that keeps the airtight airtight; a seal cylinder that is appropriately placed between the central chamber B and the pressure vessel and that airtightly connects the opening of the chamber B and the pressure vessel; and between each of the chambers and the outside. and a conveying device for transporting the material to be processed, the chamber A is a preheating chamber for preheating the material to be processed to be charged into the main body of the apparatus, and the chamber B is for charging the material to be processed into the main body of the apparatus. A hot isostatic press apparatus characterized in that a charging chamber equipped with a mechanism and a chamber C are used as cooling chambers for cooling the material to be processed after being processed in the main body of the apparatus.