JPS6226484A - 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 (HoL l5ostat).
Below icP ress0, it is abbreviated as rHrPj. ) 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 or dissimilar materials, (d) Impregnation treatment of 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 1 consists of a cylindrical container body 2, an upper lid 3, a photo 2″ nongrum 4, a bottom 1 nong 41 (yomaru lower lid 5) fixed to the inner periphery of the lower end of the cylindrical container main body 2, The material to be treated is the lower lid 5 that opens and closes the lower end opening of the pressure vessel l.
It is loaded and unloaded with the charging cylinder 6 on top. When the pressure vessel 1 is sealed, the upper cover 3 and the lower cover 5 are held down by the yoke 7, which is a mouth-shaped frame, and the pressure vessel 1 is 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 HIP apparatus, preparation of the material to be processed - charging of the material into the pressure vessel 1 - vacuum in the pressure vessel 1 - gas replacement - pressure increase →
The operation is carried out in a cycle consisting of heating, temperature increase, temperature and pressure maintenance, cooling, gas recovery, depressurization, opening of the pressure vessel to the atmosphere, and removal of the material to be treated.The cooling process must be carried out under an inert gas atmosphere. is carried out in a heating furnace inside a pressure vessel l.

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 hot, and cooling is performed outside the pressure vessel I, thereby increasing the number of times the pressure vessel I is used. That is, this device performs gas recovery and depressurization immediately after HIP processing, and as soon as the pressure drops to atmospheric pressure, the material to be treated is taken out of the pressure vessel 1 together with the heating furnace covered with an insulating hood.
After being transferred to the cooling chamber 8, the material is cooled therein, and a plurality of heating furnaces are provided so that the HIP operation can be continued after the material to be processed is taken out from the pressure vessel 1.

Figure 1O 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 heating furnace is occupied by a person in the cooling room, the former device and the cooling time itself are not very short because the heating furnace is 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.

do.

The present invention solves the above-mentioned problems by opening the lid provided at the opening of the pressure vessel to take in and take out the material to be treated, A main body of a device for hot isostatic pressing processing of materials to be processed in a pressure vessel, three chambers A, B, and C connected in series arranged in relation to the main body of the device, and a space between these chambers and an end portion. Each room A, B, C is provided between room A1C and the outside.
A seal door that keeps the central chamber B airtight and the pressure vessel (D B l: a Rl= ! W * h x
B h E 7'g "75°1°": It has a seal cylinder that communicates airtightly and a conveyance device that transfers the material to be processed between each of the chambers and the outside 1, and the chamber A
A preparation room for preparing the material to be processed to be charged into the apparatus main body, a charging chamber equipped with a mechanism for charging the material to be processed into the apparatus main body, and a chamber C in the apparatus main body. It is characterized by a cooling chamber that cools the processed material after processing.

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

After HIPing the material to be processed in the pressure vessel, a seal cylinder is placed between the opening of the pressure vessel and charging chamber B to airtightly communicate the two, and a seal cylinder is placed between the opening of the pressure vessel and charging chamber B, and Close the seal door between chambers A and C, and replace the gas inside charging chamber B and the seal cylinder.

In this state, the lid of the pressure vessel is opened and the material to be treated is taken out into the charging chamber B as it is. 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.

The next cycle is carried out in advance in the preparation room A in parallel with the above process.
The process starts with closing the seal door at the inlet and outlet of the chamber A and making preparations for charging in the preparation room A.

The material to be processed prepared in the preparation room A is transferred into the charging chamber B by opening the seal door between the preparation room A and the charging chamber 8, with gas being replaced in the charging chamber B and the seal cylinder. put in. Then, close the seal door, load the material to be treated into the pressure vessel using the loading mechanism, and then close the lid of the vessel and remove the seal tube.
Start IP processing.

By operating in this way, 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 10 in the figure is the main body of the HIF device, which is
Like the conventional one, the pressure vessel l, the yoke 7, and the yoke moving trolley! (2) and a pedestal 12.

As shown in FIG. 3, the pressure vessel l includes 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 having a flange 4a, and a bottom ring 4.
A heating furnace 14 covered by a heat insulating hood 13 is provided in the pressure vessel l, and a heater 15 is provided in the heating furnace 14.

In this HIP apparatus main body lO, when the lower lid 5 is opened to take in and take out the material W to be processed, and when the pressure vessel l is closed and the HIP process is performed, the yoke 7 is advanced to the position of the pressure vessel 1, By pressing the upper lid 3 and lower lid 5 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 preparation room for preparing the material to be processed to be charged into the main body IO of the apparatus, chamber B is a charging chamber for charging the material to be processed into the main body 10 of the apparatus, and chamber C is a chamber for processing in the main body IO of the apparatus. 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 is equipped with a charging cylinder 16 for cutting the material to be treated.

Between these chambers A and B, between chambers B and C, and between chambers A and C at the ends.
and the outside, there are side sliding seal doors 17, 18, 19. to keep each chamber A1B and C airtight, respectively.
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 1 via the seal member 23, as shown in the figure, and thereby the opening of the pressure vessel l and the The entrance B is airtightly connected, and in that state, the lower M5 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, there are space 27 provided inside each of the preparation room A1 and the cooling room C, and outside of the preparation room A and the cooling room C. Materials to be processed can be transferred between the outside and between chamber C and the outside.

Next, the operation of the HIP apparatus 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.

Preparation Room A> (First, open the seal door 9 on the population side of Preparation Room A. At this time, the seal door 17 on the exit side of Preparation Room A is closed.

(2) The material to be processed is transferred into the preparation room A by the transport device 26 located outside the preparation room A.

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

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

Then, predetermined preparation work (
For example, preheating).

(5) Open the seal lung 17 on the exit side of the preparation chamber A. At this time, the HIP apparatus main body IO and the charging chamber 13 are in the stage (20) described later.

(6) The transfer device 24 in the preparation room A transfers the material to be processed in the preparation room A to the charging chamber B, and places the material on the lower lid 5 on the charging cylinder 16 in the charging room B. Place the material to be treated on.

(7) Close the seal door 17 on the exit side of the preparation room A.

Charging chamber B-Hr'P device main body 10>(8) Charging,
By operating the cylinder 16, the lower lid 5 is raised, the material to be treated on the lower lid 5 is loaded into the pressure vessel 1 of the HIP apparatus main body 10, and the lower lid 5 is closed.

(9) The rod of the charging cylinder I6 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 lid 3 and lower M5 so as to withstand high pressure.

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

(12) 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.

(I3) After the HIF treatment within the pressure vessel 1 is completed, the gas pressure within the pressure vessel 1 is reduced and gas recovery is performed.

(I4) 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 HIP treated material is lowered while 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 cooling chamber ρ l−+? -I+, -
IQ') 11? (l! day 1゛ go-jl force
顛 h<-tr is in a replaced state.

(I8) Open the seal door 18 on the inlet side of the cooling chamber C.

(19) 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 18 on the inlet side of the cooling chamber C.

Cooling Chamber C> (21) In the cooling chamber C, the bare material to be treated is directly cooled. At this point, the pressure vessel! and charging chamber B is 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 HIP processing in the pressure vessel l, and in the preparation room A, the next processed material is further prepared. Able to perform work. For this reason, the main body of the HTP device
The usage time of O per cycle is shortened, and extremely efficient operation is achieved.

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 processed is
If it is moved by placing it on an insulated pallet 28 (see Figure 3) arranged on the upper layer, it will be easier to transport, and there is a risk that the lower cover 5 and the transport device may be damaged by the heat of the material to be processed. This has the advantage of eliminating

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 above-mentioned H,IP apparatus, since the high-temperature processed material 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 temperature. 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 explanation of the above embodiment, the cooling room C and the preparation room A
In the above, a case has been described in which each material to be processed is processed one by one, but a plurality of materials may be processed at the same time.

Further, in the above embodiment, only one cooling chamber C and one preparation 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, in the -F recording embodiment, an I (IP device) equipped with a yoke is shown, but the present invention can also be applied to devices 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 and replace the inside of the seal cylinder and charging chamber with gas to keep the material to be treated at high temperature while airtightly isolated from the outside. It can be taken out of the pressure vessel naked.

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. Furthermore, the next material to be treated can be charged into the empty pressure vessel from the preparation chamber side. Therefore, the pressure vessel can be fully utilized.

As described in 2), since the material to be treated can be cooled in its naked state, the cooling time can be shortened, and the usage time of the pressure vessel per cycle can be shortened. Therefore, it is possible to increase the number of times the HIP 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.

■Since there is no need to expose the material to be treated, as well as 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. Moreover, FIGS. 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. A side sectional view showing the HIP device, FIG. 9 is a diagram showing the operation cycle time in the HIP device shown in FIGS. 6 and 7, and FIG. 10 is a diagram showing the operation cycle time in the HIP device shown in FIG. 8. It is a diagram. 1...Pressure vessel, 5...Lower lid, 7...
... Yoke, 10 ... HIP device body, 1
6...Charging cylinder, 17-20...
Seal door, 22...Seal door, 24-27...
...transport device, A...preparation room, B...
...Charging room, C...Cooling room. 'applicant
Ishikawajima Harima Heavy Industries Co., Ltd. Figure 2 Figure 5 Time (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 preparation room for preparing the material to be processed to be loaded 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.