JPH07103662A - Hot isotropic pressurizing device - Google Patents

Abstract

PURPOSE:To facilitate maintenance and inspection of a thermal insulating layer an fully utilize the inner volume of a high pressure container by a method wherein there is provided an ascending or descending means for inputting or outputting a processed item through insertion or removal of a lower lid and for inputting or outputting a thermal insulating layer to a high pressure chamber as the lower lid is inserted or removed. CONSTITUTION:A high pressure chamber 3 is defined by covering an upper lid 2A and a lower lid 2B on each of openings 1A, 1B in a high pressure cylinder 1 having an upper opening 1A and a lower opening 1B, and then a heat insulating layer 7 forming a furnace chamber 6 provided with a heater 5 inside of it is arranged in the high pressure chamber 3. A processed item 12 inserted into a furnace chamber 6 is pressurized under a hot uniform pressure. In such a hot uniform pressurizing device as described above, an electrical power supplying means 10 for a heater 5 is removably arranged at the lower lid 2B and further there is provided a supporting means 8 for removably supporting the thermal insulating layer 7 under an external operation against the upper lid 2A. Under an operation of the ascending or descending means 9, the processed item 12 is inputted or outputted under an insertion or a removal of the lower lid 2B and at the same time the thermal insulating layer 7 having the supporting means 8 released is ascended or descended.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot isostatic pressing device.

[0002]

2. Description of the Related Art A high pressure chamber 3 is defined inside by a high pressure cylinder 1 having upper and lower openings 1A and 1B and upper and lower lids 2A and 2B for sealing the upper and lower openings 1A and 1B, respectively. ,
A heat-insulating layer 7 having a heater 5 inside and forming a furnace chamber 6 is arranged in the high-pressure chamber 3 and is inserted into the furnace chamber 6 through a hearth 11 provided in the lower lid 2B. Thing 12
The hot isostatic pressing device (hereinafter referred to as HIP device) that pressurizes the product with hot isostatic pressure is widely used for true density of products, defect removal such as casting and sintering, and diffusion bonding. ing.

In this HIP device, maintenance and inspection of the heat insulating layer and the heater are important, and particularly, the frequency of maintenance and inspection of the heater is higher than that of the heat insulating layer. Therefore, conventionally, the following means have been taken. The heat insulating layer having the heater inside is attached to the upper lid, and the upper lid is inserted into and removed from the upper opening of the high-pressure container so that the heat insulating layer can be freely taken in and out together with the heater (conventional example 1).

The lower lid is composed of a ring-shaped lower upper lid attached to the lower opening of the high-pressure container and a lower lower lid which can be inserted into and removed from the lower upper lid. The lower upper lid supports a heat insulating layer. It was freely accessible (2 of the conventional example).

[0005]

In the above-mentioned conventional example 1, since the pressure medium gas introducing portion is formed in the upper lid and the communicating pipe such as a gas cylinder is connected to the introducing portion, maintenance and inspection are required every time. , I had to disconnect the connection, and the work was complicated. On the other hand, in Conventional Example 2, although maintenance and inspection of the heat insulating layer and the like is more advantageous than in Conventional Example 1, since the lower upper lid is provided with electric power supply means for the heater, the lower upper lid has a radial thickness. As a result, the outer diameter of the lower lower lid is restricted, and there is a problem that the internal volume of the high-pressure container cannot be utilized to the maximum.

[0006] Therefore, an object of the present invention is to provide a hot isostatic pressurizing device which allows easy maintenance and inspection of the heat insulating layer and the like, and makes the maximum use of the internal volume of the high-pressure container.

[0007]

According to the present invention, there is provided a high pressure cylinder 1 having upper and lower openings 1A and 1B, and the upper and lower openings 1A and 1B.
A high pressure chamber 3 is defined inside by upper and lower lids 2A and 2B for respectively sealing 1B, and a heat insulating layer 7 having a heater 5 inside and forming a furnace chamber 6 is arranged in the high pressure chamber 3. In a hot isostatic pressurizing device for pressurizing an object to be processed 12 inserted into the furnace chamber 6 with hot isostatic pressure, the following technical means are taken in order to achieve the above object. There is.

That is, according to the first aspect of the present invention, the lower lid 2B is detachably provided with the power supply means 10 for the heater 5, and the upper lid 2A is provided with the heat insulating layer 7 by external operation. Is provided with a supporting means 8 which can be attached and detached in a manner such that the heat insulating layer 7 is supported by the upper lid 2A through the supporting means 8 and the workpiece 12 is placed on the lower lid 2B with respect to the furnace chamber 6.
And a lower lid elevating means 9 which allows the heat insulating layer 7 to be released from the high pressure chamber 6 by inserting and removing the lower lid 2B. It is characterized by that.

According to the present invention of claim 2,
A support ring 23 that supports the heat insulating layer 7 is detachably provided in the lower opening 1B, and the power supply means 10 for the heater 5 is detachably attached to the lower lid 2B fitted to the inner surface of the support ring 23. And the heat-insulating layer 7 is supported via the support ring 23 so that the workpiece 12 can be inserted into and removed from the furnace chamber 6 by inserting and removing the lower lid 2B, and the support ring 23 is released. A lower lid elevating means 9 is provided so that the heat insulating layer 7 can be freely inserted into and removed from the high pressure chamber 6 by inserting and removing the lower lid 2B.

[0010]

The object 12 to be processed inserted in the furnace chamber 6 is subjected to an isotropic pressure by an inert gas such as argon supplied from the introduction portion 4 formed in the upper lid 2A and an electric power supplied from the power supply means 10. The HIP process is performed by a synergistic effect with the heating of the heater 5 by. After the predetermined HIP process, the object to be processed 12 is taken out from the furnace chamber 6 through a cooling process, which is performed by the elevating operation of the lower lid elevating means 9 by causing the press frame (not shown) to escape.

That is, the lower lid 2B is lowered by the elevating means 9 while the heat insulating layer 7 is supported by the upper lid 2A by the supporting means 8 or while the heat insulating layer 7 is supported by the support ring 23 provided in the lower opening 1B. Then, the object to be treated 12 inserted into the lower lid 2B via the hearth 11 is pulled out from the furnace chamber 6 (see FIGS. 2 and 8). On the other hand, heat insulation layer 7 / heater 5
In the maintenance and inspection, when the supporting means 8 is released by an external operation or the supporting ring 23 is released, the lower lid elevating means 9 lowers the heat insulating layer 7 while supporting it through the lower lid 2B.
The heat insulating layer 7 is pulled out from the high pressure chamber 3 together with the heater 5.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 show an embodiment of the present invention according to claim 1. In FIG. 1, a high-pressure cylinder 1 having upper and lower openings 1A and 1B has a cylindrical shape and is formed by shrink-fitting and coupling a plurality of cylinders.

Upper and lower lids 2 are attached to the upper and lower openings 1A and 1B.
A and 2B are fitted and hermetically sealed, and a high pressure chamber 3 is defined therein. The upper lid 2A is provided with an introduction part 4 for introducing a pressure medium gas such as argon gas or nitrogen gas into the high pressure chamber 3, and a pipe (not shown) is connected to the introduction part 4 via a coupler or the like. .

Inside the high-pressure chamber 3, an inverted cup-shaped heat-insulating layer 7 having a heater 5 inside and forming a furnace chamber 6 is inserted and arranged, and the heat-insulating layer 7 is external to the upper lid 2A. It is detachably attached by an operable supporting means 8. The lower lid 2B can be freely inserted into and removed from the lower opening 1B by the lower lid elevating means 9, and the lower lid 2B is provided with a power supply means 10 for the heater 5 and a hearth 11 And the object to be treated 12 is placed in the furnace chamber 6 through the hearth 11.
Can be inserted and removed freely.

The electrode portion 10A of the power supply means 10 is detachable from the joint, and is provided with a buffer spring 10B for joining, and is provided on the lower lid 2B of the monoblock structure, where the lower lid 2B is optional. In addition, the diameter of the processing chamber is prevented from being restricted by the arrangement or size of the electrodes. The lower lid raising / lowering means 9 has an expandable / contractible cylinder structure, is provided in a traveling carriage, etc., and has a raising / lowering stroke sufficient for moving the heat insulating layer 7 in and out of the high pressure chamber 3.
The vehicle can travel freely just below the high-pressure cylinder 1 and at a maintenance / inspection position deviated therefrom.

The supporting means 8 is shown in FIGS. 4 and 5 as a first embodiment, and in FIGS. 6A and 6B as a second embodiment. 4 (A) (B) and FIG. 5 (A) (B), the guide support 13 is fixed to the central portion of the top surface of the heat insulating layer 7 with the engagement flange 13A. A support body 14 having an oval-shaped support piece 14A is fixed to the upper lid 2A that is in contact with.

A tubular connecting body 15 which is rotatable around the axes of the guide support 13 and the support 14 and which engages with the engagement flange 13A and the oval support piece 14A from above and below is fitted over the guide support 13 and the support 14. An oval hole 15A into which an oval support piece 14A can be inserted / removed is formed in the upper lid portion of the tubular connector 15, and the tubular connector 15 includes a first operating strip 16A and a second operating strip 16a.
B is connected and stopper 1 is displaced 90 degrees in the figure.
It can be engaged and disengaged by an external operation within the range of 7A and 17B.

That is, FIGS. 4A and 4B show the connected state, and the oval hole 15A of the tubular connecting body 15 and the supporting piece 14A of the supporting body 14 are out of phase with each other by 90 degrees.
Guide support body 13 and support body 14 via the tubular connecting body 15.
Are connected in the up-down direction, and the heat insulating layer 7 is supported by the upper lid 2A in a suspended manner. On the other hand, in order to release this connection, the first operating strip 16A is pulled in to draw the oval hole 15
It is released by aligning A and the oval support piece 14A as shown in FIG. 5 (A).

Therefore, the second operating member 16B is used for locking. In addition, the first and second operation members 16A, 16B
Is connected to a step motor or the like, and by applying an on / off signal to the motor from the outside, the first and second operating members 1
6A and 16B can be tensioned and relaxed freely. 6 (A) (B)
Is a second embodiment of the supporting means 8. An approximately hook-shaped engaging hook 19 that swings around a fulcrum pin 18 is provided near the center of the top surface of the heat insulating layer 7, and the engaging hook 19 is a spring. 20 urges in the engagement direction.

On the other hand, the upper lid 2A is provided with a rod 21 which expands and contracts by an external operation, and an engaged hook 22 which can engage and disengage the engaging hook 19. Since the engaging hook 19 is engaged with the engaged hook 22 in the connected state of FIG. 6 (A), the heat insulating layer 7 is supported by the upper lid 2A. As shown in B), the engaging hook 19 is disengaged from the engaged hook 22 against the spring 20 by the rod 21.

7 to 9 show an embodiment of the present invention according to claim 2, which is basically the same as the structure described with reference to FIGS. 1 to 3 and supports the heat insulating layer 7. The means to do are different. Therefore, the same parts as those in the above-described configuration are designated by common reference numerals, and the differences will be described below. A support ring 23 having an L-shaped cross section is detachably attached to the lower opening 1B of the high-pressure cylinder 1 by a fastener (not shown) or the like, and the heat insulating layer 7 is supported by the support ring 23 via legs 24. .

The support ring 23 is not provided with the power supply means 10, and therefore its wall thickness is thin and the insertion / removal hole of the lower lid 2B is large. In the above configuration, the HIP treatment of the object to be treated 12 arranged in the furnace chamber 6 is performed by the synergistic action of the energization of the heater 5 and the isotropic pressure of the pressure medium gas, and the press shaft generated during the HIP treatment. The force is carried by engaging the upper and lower lids 2A and 2B with a rectangular frame-shaped press frame.

When the predetermined HIP process is completed, the object to be processed 12 is taken out of the furnace chamber 6 through a cooling process. This removal is performed by lowering the lower lid 2B while supporting the lower lid 2B by the lower lid elevating means 9 while the heat insulating layer 7 is supported via the supporting means 8 or the supporting ring 23, as shown in FIGS. 2 and 8. It is taken out downward through the lower opening 1B, and the next object to be processed is inserted through the raising operation of the lower lid elevating means 9.

During maintenance and inspection of the heater 5 and the heat insulating layer 7, the lower lid elevating means 9 releases the supporting means 8 while the lower lid 2B is once supported, and the supporting ring 23 is released to descend. Then, as shown in FIGS. 3 and 9, the heat insulating layer 7 is pulled out from the high pressure chamber 3 together with the heater 5. When taking out the heat insulating layer 7, the upper lid 2A
In the conventional example 1 in which the lower lid 2B is moved up and down, it is necessary to remove the connecting portion of the pipe with respect to the introducing portion 4 each time, and since it is a high-pressure pipe, the removal thereof requires a considerable amount of work, whereas the lower lid 2B is lifted and lowered. In the present invention which is carried out in
It is easy to disconnect the connection part with.

[0025]

As described above in detail, according to the present invention, when performing maintenance and inspection of the heat insulating layer including the heater, the heat insulating layer is pulled out through the lower opening of the high pressure cylinder. In comparison, maintenance and inspection work is extremely easy and maintenance and inspection can be dramatically improved. Further, the power supply means for the heater can be installed at any position on the lower lid, and the restriction of the furnace chamber volume is lessened.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a HIP process in an embodiment of the present invention according to claim 1.

FIG. 2 is a cross-sectional view showing when the object to be processed is taken out in the embodiment of the present invention according to claim 1.

FIG. 3 is a cross-sectional view showing when the heat insulating layer is pulled out in the embodiment of the present invention according to claim 1.

4A and 4B show a first embodiment of the supporting means, FIG. 4A is a plan view when locked, and FIG. 4B is a sectional view of the same.

5A and 5B show a first embodiment of the supporting means, FIG. 5A is a plan view when unlocked, and FIG. 5B is a sectional view of the same.

6A and 6B show a second embodiment of the support means, FIG. 6A is a side view when locked, and FIG. 6B is a side view when unlocked.

FIG. 7 is a sectional view showing a HIP process in the embodiment of the present invention according to claim 2;

FIG. 8 is a cross-sectional view showing when the object to be processed is taken out in the embodiment of the present invention according to claim 2;

FIG. 9 is a cross-sectional view showing the heat insulating layer withdrawn in the embodiment of the present invention according to claim 2;

[Explanation of symbols]

 1 High Pressure Cylinder 1A Upper Opening 1B Lower Opening 2A Upper Lid 2B Lower Lid 3 High Pressure Chamber 5 Heater 6 Furnace Chamber 7 Insulation Layer 8 Support Means 9 Lower Lid Elevating Means 10 Power Supply Means 23 Support Ring

Claims (2)

[Claims] 1. A high-pressure cylinder (1) having upper and lower openings (1A) (1B) and upper and lower lids (2A) (2B) for sealing the upper and lower openings (1A) (1B), respectively. A high-temperature chamber (3) is defined by the inside and a heat-insulating layer (7) having a heater (5) inside and forming a furnace chamber (6) is disposed in the high-pressure chamber (3), A hot isostatic pressurizing device for pressurizing an object to be treated (12) inserted in a furnace chamber (6) by hot isostatic pressing, wherein electric power to the heater (5) is applied to the lower lid (2B). The supply means (10) is detachably provided, and the upper lid (2A) is provided.
The heat insulating layer (7) is provided with a support means (8) that is detachable by an external operation, and the heat insulating layer (7) is covered with the upper lid (2).
In the state of being supported by A) via the supporting means (8), the object to be treated (12) can be freely taken in and out of the furnace chamber (6) by inserting and removing the lower lid (2B), and the supporting means is also provided. (8) is released and the heat insulation layer (7) is attached to the high pressure chamber (6) by the lower lid (2).
A hot isostatic pressurizing device comprising a lower lid elevating means (9) which can be freely inserted and removed by inserting and removing the B). 2. A high-pressure cylinder (1) having upper and lower openings (1A) (1B) and upper and lower lids (2A) (2B) for sealing the upper and lower openings (1A) (1B), respectively. A high-temperature chamber (3) is defined by the inside and a heat-insulating layer (7) having a heater (5) inside and forming a furnace chamber (6) is disposed in the high-pressure chamber (3), A hot isostatic pressing apparatus for pressurizing an object to be treated (12) inserted in a furnace chamber (6) by hot isostatic pressing, wherein the heat insulating layer (7) is provided in the lower opening (1B). A support ring (23) for supporting the heater (5) is detachably provided, and a power supply means (10) for the heater (5) is detachably attached to the lower lid (2B) fitted to the inner surface of the support ring (23). When the heat-insulating layer (7) is provided and supported by the support ring (23), the object (1) to be processed is placed in the furnace chamber (6).
2) The lower lid (2B) can be inserted / removed to and from it, and the support ring (23) is released to release the high pressure chamber (6).
On the other hand, the hot isostatic pressing device is provided with a lower lid elevating means (9) that allows the heat insulating layer (7) to be freely inserted and removed by inserting and removing the lower lid (2B).