JP7439356B2 - Isostatic pressurization device and isostatic pressurization method - Google Patents

Description

The present invention relates to an isostatic pressurizing device and an isostatic pressurizing method.

Conventionally, in fields such as powder molding of metals and ceramics, food processing, and food sterilization, cold isostatic pressing devices (CIP) have been used to apply pressure to objects using a liquid pressure medium. )It has been known. In such a pressurizing device, a workpiece is housed in a pressure vessel, and a pressure medium is sealed in the pressure vessel, thereby subjecting the workpiece to pressure treatment.

On the other hand, Patent Document 1 discloses a warm isostatic pressing device (WIP) that performs pressure treatment and heating treatment on an object to be treated. In such a warm isostatic pressurizing device, a pressure medium heated to a predetermined set temperature is sealed in a pressure vessel, and the pressure is increased in the pressure vessel to perform pressure treatment and pressurization on the workpiece. Heat treatment is applied. As a result, it becomes possible to sterilize spore bacteria and the like that cannot be sterilized using a cold isostatic pressure device.

In such a warm isostatic pressurizing device, the temperature of the pressure medium increases due to the heat of compression when the pressure medium is pressurized to a predetermined set pressure in the pressure vessel. temperature tends to be higher than the target set temperature. For this reason, in the technique described in Patent Document 1, the temperature rise of the pressure medium during pressurization is suppressed by slowly controlling the pressure increase rate at which the pressure medium is pressurized.

Japanese Patent Application Publication No. 2003-279264

In the technique described in Patent Document 1, as a result of slowly controlling the pressure increase rate of the pressure medium, the pressure increase time becomes long, and the workpiece is subjected to extra pressure treatment before the pressure treatment, and the workpiece is There was a problem that quality deterioration and quality variations were likely to occur.

The present invention has been made in view of the above-mentioned problems, and is an isostatic pressurization method that can stably perform pressure treatment and heating treatment on a workpiece at a desired set pressure and temperature. An object of the present invention is to provide a pressure device and an isostatic pressurization method.

An isostatic pressurizing apparatus according to one aspect of the present invention is an isostatic pressurizing apparatus that performs isostatic pressurizing treatment on a workpiece using a pressure medium, and is capable of receiving a pressure medium. a pressure vessel in which a possible processing space is formed; a setting information input unit that receives input of a set temperature and a set pressure of a pressure medium during the isostatic pressurization process; and a setting information input unit that pressurizes the pressure medium in the processing space. A pressurizing mechanism capable of increasing the pressure of the pressure medium in the processing space from atmospheric pressure to the set pressure, and a pressure maintaining mechanism that maintains the pressure of the pressure medium at the set pressure after the pressurizing operation. a temperature adjustment mechanism capable of adjusting the temperature of the pressure medium in the processing space; and a pressure control mechanism capable of detecting the pressure of the pressure medium in the processing space. a detection unit, a temperature detection unit capable of detecting the temperature of the pressure medium in the processing space, and a pressure medium information storage that stores pressure medium information that is information related to the compression ratio and volumetric expansion coefficient of the pressure medium. , the pressure medium information stored in the pressure medium information storage unit, the set pressure input to the setting information input unit, and the pressure of the pressure medium detected by the pressure detection unit before the pressure increase operation. a temperature rise amount estimating section that estimates a temperature rise amount of the pressure medium caused by the pressure increasing operation based on the initial pressure; and a temperature rise amount estimating section that estimates the temperature rise amount estimated by the temperature rise amount estimating section from the set temperature. a target temperature determination unit that determines a target temperature of the pressure medium before the pressure increasing operation; and a temperature adjustment mechanism that adjusts the temperature of the pressure medium in the processing space to the target temperature determined by the target temperature determination unit. A temperature control unit that controls the temperature control unit.

According to this configuration, the temperature increase amount estimating section estimates in advance the amount of temperature increase of the pressure medium in the pressure increasing operation, and the target temperature determining section takes this temperature increase amount into consideration and sets the target temperature of the pressure medium before pressure increasing to the set temperature. The temperature controller adjusts the temperature of the pressure medium before the pressure increasing operation to the target temperature. For this reason, it is possible to bring the temperature of the pressure medium close to the set temperature after the end of the pressure increase operation without suppressing the pressure increase rate in order to reduce the temperature rise during pressure increase of the pressure medium. Also, it becomes possible to stably perform isostatic pressure treatment including pressure treatment and heating treatment on the object to be treated at a set temperature.

In the above configuration, the pressure medium information storage unit stores the compression ratio and volumetric expansion coefficient of the pressure medium as the pressure medium information, and the temperature rise amount estimation unit stores the nth (n is In the isostatic pressure pressurization process (natural number), the compression ratio and volumetric expansion coefficient of the pressure medium stored in the pressure medium information storage unit, the set pressure input to the setting information input unit, and the pressure detection unit detect It is desirable to estimate the temperature increase amount based on the initial pressure.

According to this configuration, in the n-th isostatic pressurization process, the amount of temperature rise of the pressure medium during the pressurization operation can be easily estimated based on the compression ratio and volumetric expansion coefficient stored in advance in the pressure medium information storage unit. can do.

In the above configuration, the temperature detection section detects a post-pressurization temperature that is the temperature of the pressure medium at the end of the pressure increase, which is after the pressure increase operation is performed and before the pressure maintenance operation is performed. is possible, and the pressure medium information storage unit stores the actual temperature increase amount, which is the difference between the temperature after pressurization and the target temperature, the set pressure, and the initial pressure in the n-th isostatic pressurization process. It is possible to store correlation information, which is information indicating a correlation between the actual pressure increase amount, which is the difference between the is a natural number and m>n), and in the isostatic pressurization process, the temperature increase amount is estimated based on the difference between the set pressure and the initial pressure and the correlation information stored in the pressure medium information storage unit. It is desirable to do so.

According to this configuration, in the m-th isostatic pressurization process, correlation information between the actual temperature rise amount and the actual pressure rise amount actually measured in the n-th isostatic pressurization process is used to increase the pressure during the pressure increase operation. In order to estimate the amount of temperature rise of the pressure medium, the isostatic pressurization device used is compared to the case where the temperature rise is estimated using the compression ratio and volumetric expansion coefficient, which are known physical property values of the pressure medium. The amount of temperature rise can be estimated with high accuracy according to the characteristics of

In the above configuration, the pressure medium information storage unit can update the correlation information by further storing the actual temperature increase amount and the actual pressure increase amount in the m-th isostatic pressurization process. The temperature increase amount estimating unit calculates the difference between the set pressure and the initial pressure and the pressure medium information in the p-th (p is a natural number and p>m) isostatic pressurization treatment on the workpiece. It is desirable that the temperature increase amount be estimated based on the updated correlation information stored in the storage unit.

According to this configuration, in the p-th isostatic pressurization process, the correlation information includes a plurality of actual temperature rise amounts and a plurality of actual pressure rise amounts actually measured in the n-th and m-th isostatic pressurization processes. By using this, it is possible to estimate the amount of temperature rise of the pressure medium during the pressure increasing operation with higher accuracy.

In the above configuration, the pressure medium information storage section is capable of storing the correlation information in each of a plurality of preset temperature regions, and the temperature increase amount estimating section is capable of storing the correlation information in the setting information input section. It is preferable that one of the plurality of temperature regions be selected in accordance with the input set temperature, and the temperature increase amount be estimated based on the correlation information in the one temperature region.

According to this configuration, even if at least one of the compressibility and volumetric expansion coefficient of the pressure medium changes greatly depending on the temperature, by using the correlation information of the temperature range corresponding to the set temperature, it is possible to It is possible to estimate the amount of temperature rise of the pressure medium with higher accuracy.

An isostatic pressurization method according to another aspect of the present invention is an isostatic pressurization method for performing isostatic pressurization treatment on a workpiece using a pressure medium. The isostatic pressurization method includes a process condition setting step of setting a set temperature and a set pressure of the pressure medium during the isostatic pressurization process, and a process space capable of receiving the pressure medium. A pressurizing mechanism capable of performing a pressure increasing operation of increasing the pressure of a pressure vessel and a pressure medium from atmospheric pressure to the set pressure, and a pressure maintaining operation of maintaining the pressure of the pressure medium at the set pressure after the pressurizing operation, and the processing. a preparation step of preparing a pressure detection unit capable of detecting the pressure of the pressure medium in the space and a temperature detection unit capable of detecting the temperature of the pressure medium in the processing space; Based on pressure medium information that is information related to compression ratio and volume expansion coefficient, the set pressure, and the initial pressure that is the pressure of the pressure medium before the pressure increase operation, calculate the amount of temperature rise of the pressure medium caused by the pressure increase operation. a step of estimating the amount of temperature rise; a step of determining a target temperature of the pressure medium before the pressure increasing operation by subtracting the estimated amount of temperature rise from the set temperature; and a step of determining the target temperature of the pressure medium before the pressure increasing operation; a temperature adjustment step of adjusting the temperature of the medium to the target temperature; a pressure increase step of performing the pressure increase operation by the pressurization mechanism with the temperature of the pressure medium adjusted to the target temperature; and a pressure increase step after the pressure increase step. and a pressure maintaining step of performing the pressure maintaining operation using a pressure mechanism.

According to this method, the amount of temperature rise of the pressure medium during the pressure increase operation is estimated in advance and the temperature of the pressure medium before the pressure increase operation is adjusted in anticipation of the temperature increase, thereby reducing the temperature rise during the pressure increase of the pressure medium. Therefore, it is possible to bring the temperature of the pressure medium close to the set temperature after the end of the pressure increase operation without reducing the pressure increase rate, and it is possible to perform isostatic pressurization including pressure treatment and heating treatment at the preset set pressure and temperature. It becomes possible to stably perform pressure treatment on the object to be treated.

In the above method, the temperature increase amount estimating step includes determining the compressibility and volumetric expansion coefficient of the pressure medium, the set pressure, and the initial pressure in the n-th (n is a natural number) isostatic pressurization treatment on the workpiece. Preferably, the method further includes estimating the amount of temperature increase based on.

According to this method, in the n-th isostatic pressurization process, the amount of temperature rise of the pressure medium during the pressure increasing operation can be easily estimated based on the compression ratio and volumetric expansion coefficient of the pressure medium.

In the above method, in the n-th isostatic pressurization treatment, an actual temperature increase amount that is the difference between the temperature after pressure increase and the target temperature and an actual pressure increase that is the difference between the set pressure and the initial pressure. The temperature increase amount estimation step further includes a recording step of recording correlation information, which is information indicating a correlation with the amount, as the pressure medium information, and the temperature increase amount estimating step includes the step of estimating the amount of temperature increase for the mth time (m is a natural number and m>n) for the workpiece. It is preferable that the isostatic pressurization process further includes estimating the temperature increase amount based on the difference between the set pressure and the initial pressure and the recorded correlation information.

According to this method, in the m-th isostatic pressurization process, correlation information between the actual temperature increase amount and the actual pressure increase amount actually measured in the n-th isostatic pressurization process is used to In order to estimate the temperature rise of the pressure medium, compared to estimating the temperature rise using the compressibility and volumetric expansion coefficient, which are known physical properties of the pressure medium, the isostatic pressurization used is The amount of temperature rise can be estimated with high accuracy according to the characteristics of the device.

In the above method, the recording step includes updating the correlation information by further recording the actual temperature increase amount and the actual pressure increase amount in the m-th isostatic pressure treatment, The increase amount estimation step is based on the difference between the set pressure and the initial pressure and the updated correlation information in the p-th (p is a natural number and p>m) isostatic pressurization treatment on the object to be treated. Preferably, the method further includes estimating the amount of temperature increase.

According to this method, in the p-th isostatic pressurization process, correlation information including a plurality of actual temperature increases and a plurality of actual pressure increase amounts actually measured in the n-th and m-th isostatic pressurization processes is obtained. By using this, it is possible to estimate the amount of temperature rise of the pressure medium during the pressure increasing operation with higher accuracy.

In the above method, the recording step includes recording the correlation information in each of a plurality of preset temperature regions, and the temperature increase amount estimating step includes recording the correlation information in each of a plurality of preset temperature regions. It is preferable that the method includes selecting one temperature region among the regions and estimating the temperature increase amount based on the correlation information in the one temperature region.

According to this method, even if at least one of the compressibility and volume expansion coefficient of the pressure medium changes greatly depending on the temperature, by using the correlation information of the temperature range corresponding to the set temperature, it is possible to It is possible to estimate the amount of temperature rise of the pressure medium with higher accuracy.

According to the present invention, there is provided an isostatic pressurizing device and an isostatic pressurizing method that are capable of stably performing pressurization treatment and heating treatment on a workpiece at a desired set pressure and temperature. Ru.

1 is a schematic configuration diagram of an isostatic pressurizing device according to an embodiment of the present invention. FIG. 1 is a block diagram of an isostatic pressurizing device according to an embodiment of the present invention. FIG. 3 is a conceptual diagram of correlation information stored in a pressure medium information storage unit of the isostatic pressurizing device according to an embodiment of the present invention. It is a graph which shows the correlation information of the pressure change of a pressure medium, and a temperature change in the isostatic pressurization device based on one Embodiment of this invention. It is a graph which shows the correlation information of the pressure change of a pressure medium, and a temperature change in the isostatic pressurization device based on one Embodiment of this invention. It is a flowchart of the isostatic pressurization process performed in the isostatic pressurization apparatus concerning one embodiment of the present invention. It is a flowchart of the isostatic pressurization process performed in the isostatic pressurization apparatus concerning one embodiment of the present invention. It is a graph which shows the correlation information of the pressure change of a pressure medium, and a temperature change in the isostatic pressurization device based on one Embodiment of this invention. It is a graph which shows the correlation information of the pressure change of a pressure medium, and a temperature change in the isostatic pressurization device based on one Embodiment of this invention. It is a graph which shows the correlation information of the pressure change of a pressure medium, and a temperature change in the isostatic pressurization device based on one Embodiment of this invention. It is a graph which shows the correlation information of the pressure change of a pressure medium, and a temperature change in the isostatic pressurization device based on one Embodiment of this invention. 2 is a graph showing changes in pressure and temperature of a pressure medium in a conventional isostatic pressurizing device.

EMBODIMENT OF THE INVENTION Hereinafter, with reference to drawings, the isostatic pressurization apparatus 1 (also referred to as a warm isostatic pressurization apparatus) based on one Embodiment of this invention is demonstrated. FIG. 1 is a schematic configuration diagram of an isostatic pressurizing device 1 according to the present embodiment. FIG. 2 is a block diagram of the isostatic pressurizing device 1 according to this embodiment. The isostatic pressurizing device 1 performs an isostatic pressurizing process on an object to be processed using a pressure medium PM.

In the following explanation, the object to be processed is food, but the object to be processed may also be a product other than food (for example, a drink) or an inorganic substance such as metal powder or ceramic powder (inorganic powder, etc.). ).

An isostatic pressurizing device 1 according to an embodiment of the present invention includes a pressurizing device 10 (pressurizing mechanism), a pressure vessel 11, a hydraulic unit 13, a pressure sensor 16 (pressure detection section), and a temperature sensor 17. (temperature detection section), oil supply/discharge port 20, heating device 21 and cooling device 22 (temperature adjustment mechanism), control section 50, operation section 510 (Fig. 2) (setting information input section), and display section. 511.

A processing space S capable of receiving pressure medium PM is formed inside the pressure vessel 11 . As an example, in this embodiment, water is stored in the processing space S as the pressure medium PM. The pressure vessel 11 includes a container body 111 having a cylindrical shape, a lid portion 112, and a partition wall 113. Both ends of the container body 111 in the axial direction are open, and the lid portion 112 seals one end of the both ends of the container body 111. On the other hand, the other end of the both ends of the container body 111 is sealed by the piston rod 102 of the pressure booster 10. The partition wall 113 has a cylindrical shape and is arranged to surround the container body 111 from the outside in the radial direction. The inside of the partition wall 113 communicates with the oil supply/discharge port 20, and can store heat medium oil supplied from the heating device 21 or refrigerant oil supplied from the cooling device 22 through the oil supply/discharge port 20. As a result, the temperature of the pressure medium PM in the processing space S of the container body 111 can be adjusted.

The pressure booster 10 is capable of pressurizing the pressure medium PM within the processing space S of the container body 111. The pressure increase device 10 performs a pressure increase operation to increase the pressure of the pressure medium PM in the processing space S from atmospheric pressure to a set pressure Ps described below, and a pressure maintenance operation to maintain the pressure of the pressure medium PM at the set pressure Ps after the pressure increase operation. It is possible to perform each of the operations. In the pressure maintenance operation, the pressure of the pressure medium PM is maintained within a predetermined range including the set pressure Ps. Further, the pressure booster 10 includes a cylinder body 101 and a piston rod 102.

The cylinder body 101 has a cylindrical shape. The piston rod 102 has a piston portion 102A and a rod portion 102B. The piston portion 102A partitions the inside of the cylinder body 101 into a head side oil chamber 101A and a rod side oil chamber 101B. The rod portion 102B is a cylindrical member arranged to extend from the surface of the piston portion 102A on the rod-side oil chamber 101B side, and its tip portion penetrates the outer wall of the cylinder body 101 and is connected to the pressure vessel 11 described above. The other end of the container body 111 is sealed.

The hydraulic unit 13 supplies hydraulic oil to the booster 10 and includes a directional switching valve 14 made of a solenoid valve and a hydraulic pump 15. The hydraulic pump 15 is a variable displacement hydraulic pump that discharges hydraulic oil to be supplied to the pressure booster 10. The directional switching valve 14 is disposed between the hydraulic pump 15 and the pressure booster 10 in the hydraulic oil supply path. Further, the directional control valve 14 and the head-side oil chamber 101A of the cylinder body 101 communicate with each other through an oil passage 131, and the directional control valve 14 and the rod-side oil chamber 101B communicate with each other through an oil passage 132.

Further, the directional switching valve 14 has a pair of solenoids, and the position of the directional switching valve 14 is switched by inputting a switching command signal to the solenoid. In FIG. 1, the directional control valve 14 is arranged in a neutral position. In this case, since the supply of hydraulic oil to the booster 10 and the discharge of hydraulic oil from the booster 10 are blocked, the position of the piston rod 102 does not change significantly. On the other hand, when a switching command signal is input from a control unit 50 (described later) to the left solenoid of the directional switching valve 14 in FIG. 1, the directional switching valve 14 is switched to a position to the left of the neutral position. In this case, the hydraulic oil discharged from the hydraulic pump 15 flows into the head side oil chamber 101A through the oil passage 131, while the hydraulic oil is discharged from the rod side oil chamber 101B into the tank. As a result, the piston rod 102 moves in the direction of the arrow in FIG. 1, and the rod portion 102B pressurizes the pressure medium PM in the processing space S of the container body 111. On the other hand, when a switching command signal is input from a control section 50 (described later) to the right solenoid of the directional switching valve 14 in FIG. 1, the directional switching valve 14 is switched to a position to the right of the neutral position. In this case, the hydraulic oil discharged from the hydraulic pump 15 flows into the rod-side oil chamber 101B through the oil passage 132, while the hydraulic oil is discharged from the head-side oil chamber 101A into the tank. As a result, the piston rod 102 moves in the direction opposite to the direction of the arrow in FIG. 1, and the pressure increase of the pressure medium PM by the rod portion 102B is canceled (weakened).

The pressure sensor 16 is capable of detecting the pressure of hydraulic oil in the oil passage 131. Note that this pressure is equal to the pressure in the head side oil chamber 101A. Further, since the cross-sectional area of the piston portion 102A on the head-side oil chamber 101A side and the cross-sectional area of the tip of the rod portion 102B (cross-sectional area of the processing space S) are both known, the operation detected by the pressure sensor 16 It becomes possible to calculate the pressure of the pressure medium PM in the processing space S from the oil pressure and the ratio of the cross-sectional areas. As a result, the arithmetic element (not shown) included in the pressure sensor 16 can detect the pressure of the pressure medium PM within the processing space S.

The temperature sensor 17 is composed of a thermocouple that penetrates the lid portion 112 and is exposed to the processing space S, and is capable of detecting the temperature of the pressure medium PM within the processing space S.

The heating device 21 can heat the pressure medium PM in the processing space S by supplying heat medium oil into the partition wall 113 of the pressure vessel 11 . The heating device 21 includes a tank that receives power from a primary power source PW and stores heat medium oil, a variable capacity hydraulic pump capable of discharging the heat medium oil, and a heat medium oil supply/discharge port 211. The cooling device 22 can cool the pressure medium PM in the processing space S by supplying refrigerant oil into the partition wall 113 of the pressure vessel 11 . The cooling device 22 includes a tank that receives power from a primary power source PW and stores refrigerant oil, a variable capacity hydraulic pump capable of discharging refrigerant oil, and a refrigerant oil supply/discharge port 221. The heat medium oil supply/discharge port 211 and the refrigerant oil supply/discharge port 221 can be selectively connected to the oil supply/discharge port 20 by a switching mechanism (not shown). The heating device 21 and the cooling device 22 function as a temperature adjustment mechanism capable of adjusting the temperature of the pressure medium PM within the processing space S.

The control unit 50 functions by receiving power from a primary power source PW, and includes a CPU (Central Processing Unit), a ROM (Read Only Memory) that stores a control program, and a RAM (Random Access) that is used as a work area for the CPU. Memory), etc. The control section 50 (FIG. 2) is electrically connected to the operation section 510, the pressure sensor 16, the temperature sensor 17, the heating device 21, the cooling device 22, and the display section 511.

The operation unit 510 is disposed adjacent to the control unit 50 in FIG. 1, and includes operation buttons, a touch panel, etc. for the operator who operates the isostatic pressurizing device 1 to input various information. As an example, the operation unit 510 receives an input of setting information that is information including a preset temperature Ts and a preset pressure Ps of the pressure medium during the isostatic pressurization process.

The display unit 511 is disposed adjacent to the control unit 50 in FIG. Consists of etc.

The control unit 50 controls the pressure medium temperature setting unit 501 (temperature increase estimation unit, target temperature determination unit), temperature control unit 502, and storage unit 503 (pressure medium temperature setting unit) by the CPU executing a control program stored in the ROM. media information storage unit), a display input unit 504, and a determination unit 505.

The pressure medium temperature setting unit 501 calculates and estimates the amount of temperature rise Δt of the pressure medium PM that occurs during the pressure increase operation of the pressure medium PM by the pressure increase device 10. Further, the pressure medium temperature setting unit 501 calculates and determines a target temperature Ti of the pressure medium PM before the pressure increasing operation.

The temperature control unit 502 controls at least one of the heating device 21 and the cooling device 22 so as to adjust the temperature of the pressure medium PM in the processing space S to the target temperature Ti calculated and determined by the pressure medium temperature setting unit 501. control.

The storage unit 503 stores and outputs pressure medium information that is information related to the compression ratio κT and the volumetric expansion coefficient αV of the pressure medium PM. Specifically, the storage unit 503 stores the compression ratio κT and volumetric expansion coefficient αV of the pressure medium PM as the pressure medium information. Further, the temperature sensor 17 described above detects a post-pressure increase temperature Tf, which is the temperature of the pressure medium PM at the end of the pressure increase, which is after the pressure increase operation is performed and before the pressure maintenance operation is performed. The storage unit 503 can store correlation information (correlation data) that is information indicating the correlation between the actual temperature increase amount ΔT and the actual pressure increase amount ΔP as the pressure medium information. Note that the actual temperature increase amount ΔT is the difference between the temperature Tf after pressure increase and the target temperature Ti, and the actual pressure increase amount ΔP is the difference between the set pressure Ps and the pressure medium detected by the pressure sensor 16 before the pressure increase operation. This is the difference from the initial pressure Pi, which is the pressure of PM. FIG. 3 is a conceptual diagram of the correlation information stored in the storage unit 503 of the isostatic pressurizing device 1 according to the present embodiment. In this manner, in the present embodiment, the storage unit 503 can store correlation information between the actual temperature increase amount ΔT and the actual pressure increase amount ΔP in each of a plurality of preset temperature ranges TR. Here, as shown in FIG. 3, four temperature regions TR are set from 80° C. to 160° C., each having a width of 20 degrees. Note that in FIG. 3, TR: 80°C to 100°C indicates a region of 80°C or more and less than 100°C. The same applies to other areas.

Furthermore, the pressure medium temperature setting unit 501 sets the temperature of the pressure medium PM caused by the pressure increasing operation based on the pressure medium information stored in the storage unit 503 and the set pressure Ps and initial pressure Pi input to the operation unit 510. The amount of increase Δt is calculated and estimated. Further, the pressure medium temperature setting unit 501 calculates and determines the target temperature Ti of the pressure medium PM before the pressure increasing operation by subtracting the temperature increase amount Δt from the set temperature Ts.

The display input unit 504 displays information such as the temperature increase amount Δt calculated by the pressure medium temperature setting unit 501 and a graph showing correlation information between the actual temperature increase amount ΔT and the actual pressure increase amount ΔP on the display unit 511. Enter and display. As a result, the operator operating the isostatic pressurizing device 1 can visually confirm this information.

The determination unit 505 executes a predetermined determination process in the isostatic pressurization process as described later.

4 and 5 are graphs showing correlation information between pressure changes and temperature changes of the pressure medium PM in the isostatic pressurizing device 1 according to the present embodiment. Further, FIG. 12 is a graph showing changes in the pressure and temperature of the pressure medium PM in the conventional isostatic pressurizing device.

As shown in FIG. 12, in the conventional isostatic pressurization method, the pressure medium PM in the processing space S of the pressure vessel 11 is pressurized to a set pressure Ps (pressure increase operation ), the temperature of the pressure medium PM was set in advance to the set temperature Ts. Therefore, the temperature of the pressure medium PM rises from the set temperature Ts due to compression heat during the pressure increase operation, and the temperature of the pressure medium PM during the pressure increase process (pressure maintenance operation) remains higher than the target set temperature Ts. Ta. In this case, the heating treatment of the object to be processed becomes excessive, resulting in a problem in the quality of the object. In still another isostatic pressurization method, the pressure increase rate is controlled to be suppressed in order to suppress the temperature rise of the pressure medium PM during the pressure increase operation. In this case, the pressure treatment applied to the object to be processed becomes excessive, which similarly causes problems in the quality of the object to be processed.

In this embodiment, in order to solve the above problem, the pressure medium temperature setting section 501 of the control section 50 estimates in advance the temperature increase amount Δt of the pressure medium PM during the pressure increasing operation. The basic idea of this embodiment will be explained with reference to FIG. 4. The temperature of the pressure medium PM in the processing space S of the pressure vessel 11 before the pressure is increased is detected by the temperature sensor 17, and this temperature is defined as T1a (° C.). Thereafter, the pressure medium PM in the processing space S is pressurized by the pressurization device 10, and the temperature of the pressure medium PM at the time when the pressure reaches the final pressure P1 from the pressure P0 before the pressurization operation is defined as T1b (° C.). Ru. As a result, the temperature increase amount Δt of the pressure medium PM due to the pressure increasing operation is calculated by the following equation 1.
Δt=T1b-T1a...(Formula 1)
Here, assuming that the amount of compression of the object to be processed is extremely small compared to the amount of pressure medium PM in the processing space S, the amount of temperature rise Δt of the pressure medium PM due to the heat of compression is the volumetric expansion coefficient αV of the pressure medium PM. , can be expressed by Equation 2 using the compressibility κT of the pressure medium PM.
Δt=(P1-P0)×(κT/αV) (Formula 2)
That is, assuming that κT and αV are both constant, as shown in FIG. 4, the temperature increase amount Δt (temperature change) of the pressure medium PM has a slope with the pressure change amount Δp (= pn - p0) as a variable. It can be expressed by a linear equation (κT/αV) (correlation information between the temperature increase amount Δt and the pressure change amount Δp). Therefore, if the slope (κT/αV) and the pressure P0 before the pressure increase operation are known, it is possible to estimate the temperature rise amount Δt of the pressure medium PM due to the pressure increase operation up to the final pressure P1 (=set pressure Ps). .

Here, the inventor of the present invention focused on the fact that the coefficient of volumetric expansion αV changes when the temperature changes, and the compression ratio κT changes when the pressure changes, and prepared the correlation information shown in FIG. 4 for each of multiple temperature regions TR. (FIG. 3), we have newly discovered that the temperature increase amount Δt is estimated using unique correlation information according to each temperature region TR. That is, in each temperature region TR, assuming that the volumetric expansion coefficient αV is constant, the compression ratio κT changes with pressure, so the correlation information between the temperature increase amount Δt and the pressure change amount Δp is expressed by a linear equation as shown in FIG. I won't be able to do that. Specifically, since the compression ratio κT decreases with pressure, the slope of the graph of the correlation information decreases as the set pressure Ps (pressure change amount Δp) decreases, resulting in a characteristic as shown in FIG. 5. As the number of data in FIG. 5 increases, the accuracy of the graph increases, and the temperature increase amount Δt can be estimated with high accuracy.

Next, isostatic pressurization processing according to the present embodiment based on the above concept will be described. FIG. 6 is a flowchart of the first isostatic pressurization process executed in the isostatic pressurization device 1 according to the present embodiment. FIG. 7 is a flowchart of the second isostatic pressurization process executed in the isostatic pressurizer 1 according to the present embodiment. Further, FIGS. 8 to 11 are graphs showing correlation information between pressure changes and temperature changes of the pressure medium PM in the isotropic pressurizing device 1 according to the present embodiment.

With reference to FIG. 6, the first isostatic pressurization process executed in the isostatic pressurizer 1 according to the present embodiment will be described. Note that in the following explanation, the first, second, third and subsequent times refer to isostatic pressurization processing performed using the same pressure medium PM (for example, water) at the site where the isostatic pressurization device 1 is used. means the number of times. In this case, the same workpiece may be processed multiple times, regardless of the material, shape, etc. of the workpiece, or the workpiece in the processing space S is taken out after the first treatment, Another workpiece may be thrown into the processing space S for the second processing.

When the first isostatic pressurization process is started, the volumetric expansion coefficient αV and compression ratio κT of the pressure medium PM are obtained, respectively (step S01). Here, the volumetric expansion coefficient αV and the compression ratio κT are calculated based on data from a trial run performed in advance and are stored in the storage unit 503, so the storage unit 503 outputs these information. For the compression ratio κT, κT=0.476×10 ⁻⁹ (Pa ⁻¹ ) is stored as an actual value at a set pressure Ps=700 (MPa) and a set temperature Ts=130 (°C), and the volumetric expansion coefficient αV , αV=3.03×10 ⁻³ (K ⁻¹ ) is stored based on the measured compression ratio κT and the above-mentioned equation 2.

When the isostatic pressurization process is executed, the isostatic pressurization apparatus 1 including the above-mentioned pressure booster 10, pressure vessel 11, pressure sensor 16, temperature sensor 17, etc. is prepared (preparation step).

Next, when the operator inputs (sets) the set temperature Ts and set pressure Ps by operating the operating section 510 (processing condition setting step), the operating section 510 accepts the input set temperature Ts and set pressure Ps. (Step S02). As an example, Ts=130 (° C.) and Ps=500 (MPa) are input.

Next, the pressure medium temperature setting unit 501 calculates (estimates) the temperature rise amount Δt of the pressure medium PM caused by the pressure increasing operation as shown in Equation 3 below (step S03) (temperature rise amount estimation step). Note that the initial pressure Pi at this time is 0.1 (MPa).
Δt=ΔP×κT/αV=(Ps-Pi)×κT/αV=(500−0.1)×10 ⁶ ×0.476×10 ⁻⁹ /3.03×10 ⁻³ =78.5(℃ ) ... (Formula 3)

As a result, the pressure medium temperature setting unit 501 calculates (determines) the target temperature Ti to be adjusted by subtracting the temperature increase amount Δt from the set temperature Ts as shown in Equation 4 below (step S04) (target temperature determination process).
Ti=Ts-Δt=130-78.5=51.5 (°C) (Formula 4)

Next, the temperature control unit 502 controls the heating device 21 to adjust the temperature of the pressure medium PM in the processing space S to the target temperature Ti calculated above (step S05) (temperature adjustment step).

Next, the storage unit 503 stores the target temperature Ti calculated above together with the initial pressure Pi (step S06).

Next, a predetermined switching command signal is input from the control unit 50 to the hydraulic unit 13, and the pressurization process (pressure increase operation, pressure maintenance operation) by the pressure increase device 10 is executed (step S07) (pressure increase process, pressure maintenance process). ).

When the pressure increase operation of the above pressure increase process is completed, the storage unit 503 stores the temperature (post-pressure increase temperature Tf) and pressure of the pressure medium PM after the pressure increase operation is executed and before the pressure maintenance operation is executed. (pressure Pf after boosting) is stored (step S08). Here, it is assumed that the temperature sensor 17 detects the temperature after pressure increase Tf=135° C., and the pressure sensor 16 detects the pressure after pressure increase Pf=500 (MPa).

Furthermore, the pressure medium temperature setting unit 501 determines the actual temperature increase amount ΔT (=135-51.5=83. 5 (° C.)) and an actual pressure increase amount ΔP (=500−0.1=499.9 (MPa)), which is the difference between the set pressure Ps and the initial pressure Pi (step S09). Note that the actual pressure increase amount ΔP may be the difference between the set pressure Ps and the initial pressure Pi.

Then, the storage unit 503 creates correlation data between the calculated actual temperature increase amount ΔT and actual pressure increase amount ΔP (step S10) (recording step). At this time, as shown in FIG. 8, in the storage unit 503, the correlation data (ΔP=499.9 (MPa) and ΔT=83.5 (°C)).

As described above, in the first isostatic pressurization process, the pressure medium temperature setting unit 501 inputs the volumetric expansion coefficient αV and compression ratio κT of the pressure medium PM stored in the storage unit 503 to the operation unit 510. The temperature increase amount Δt is calculated (estimated) based on the set pressure Ps and the initial pressure Pi detected by the pressure sensor 16. Then, the temperature of the pressure medium PM is adjusted to the target temperature Ti according to the calculated temperature increase amount Δt, so the pressure medium PM rises to the set temperature Ts by the pressure increase operation, and the subsequent pressurization process (pressure maintenance operation) can be performed stably.

Next, with reference to FIG. 7, the second isostatic pressurization process will be described. When the second isostatic pressurization process is started, the operator operates the operation unit 510, and the operation unit 510 receives the set temperature Ts and the set pressure Ps (step S11) (processing condition setting step). . As an example, Ts=100 (°C) or 130 (°C) and Ps=400 (MPa) are input.

Next, the determining unit 505 determines whether there is correlation data corresponding to the set temperature Ts (step S12). Specifically, when the set temperature Ts is 130 (°C), the correlation data is created in the storage area of the temperature range TR of 120°C to 140°C in the first isostatic pressurization process described above (step YES at S12). For this reason, the pressure medium temperature setting unit 501 determines that ΔP, which is the difference between the set pressure Ps (400 MPa) and the initial pressure Pi (0.1 MPa), is 399. Based on 9 MPa, the temperature increase amount Δt=66.8 (° C.) is estimated (step S13) (FIG. 9) (temperature increase amount estimation step).

Thereafter, steps S04 to S09 (processing A) in FIG. 6 are executed similarly to the first isostatic pressurization process (step S14). At this time, the pressure medium temperature setting unit 501 calculates the target temperature Ti to be adjusted as shown in Equation 5 below (step S04) (target temperature determination step).
Ti=Ts-Δt=130-66.8=63.2 (°C) (Formula 5)

Thereafter, similarly to the first time, the temperature adjustment step, the pressure increase step, and the pressure maintenance step are each performed. Here, it is assumed that the temperature sensor 17 detects the temperature after pressure increase Tf=120° C., and the pressure sensor 16 detects the pressure after pressure increase Pf=400 (MPa). As a result, the pressure medium temperature setting unit 501 determines the actual temperature increase amount ΔT (=120−63.2=56 .8 (°C)) and an actual pressure increase amount ΔP (=400-0.1=399.9 (MPa)) which is the difference between the set pressure Ps and the initial pressure Pi (step S09).

Then, the storage unit 503 updates the correlation data by further storing the actual temperature increase amount ΔT and the actual pressure increase amount ΔP calculated in step S09 of the second isostatic pressurization process (step S15). (recording process). At this time, as shown in FIG. 10, the correlation data (ΔP=399.9 (MPa) ) and ΔT=56.8 (°C)) are added. As shown in FIG. 10, the correlation data updated in the storage unit 503 is not a linear equation, but draws a curve as shown in FIG.

On the other hand, in step S12, if the set temperature Ts is 100 (°C), the correlation data is not created in the storage area of the temperature range TR of 100°C to 120°C corresponding to the set temperature Ts in the storage unit 503. (NO in step S12). Therefore, the pressure medium temperature setting unit 501 determines the difference between the set pressure Ps (400 MPa) and the initial pressure Pi (0.1 MPa) in the correlation data of the temperature range TR of 120° C. to 140° C. which is closest to the set temperature Ts. Based on ΔP=399.9 MPa, the temperature increase amount Δt=66.8 (° C.) is estimated (step S17) (FIG. 9) (temperature increase amount estimation step).

Thereafter, steps S04 to S09 (processing A) in FIG. 6 are executed similarly to the first isostatic pressurization process (step S18). At this time, the pressure medium temperature setting unit 501 calculates the target temperature Ti to be adjusted as shown in Equation 6 below (step S04) (target temperature determination step).
Ti=Ts-Δt=100-66.8=33.2(℃)...(Formula 6)

Thereafter, similarly to the first time, the temperature adjustment step, the pressure increase step, and the pressure maintenance step are each performed. Here, it is assumed that the temperature sensor 17 detects the temperature after pressure increase Tf=95° C., and the pressure sensor 16 detects the pressure after pressure increase Pf=400 (MPa). As a result, the pressure medium temperature setting unit 501 determines the actual temperature increase amount ΔT (=95-33.2=61 .8 (°C)) and the actual pressure increase amount ΔP (=400-0.1=399.9 (MPa)) which is the difference between the set pressure Ps and the initial pressure Pi (step S09).

Then, the storage unit 503 stores the original temperature of 100° C. to 120° C. based on the actual temperature increase amount ΔT and actual pressure increase amount ΔP calculated in step S18 (step S09) of the second isostatic pressurization process. Correlation data is newly created in the storage area of the temperature range TR (step S19) (FIG. 11) (recording step).

Note that the same process as in FIG. 7 is repeated in the third and subsequent isostatic pressurization processes. That is, the pressure medium temperature setting unit 501 determines the amount of temperature increase based on the difference between the set pressure Ps and the initial pressure Pi and the updated correlation information in the third and subsequent isostatic pressurization treatments for the workpiece. Estimate Δt (temperature increase amount estimation step). As a result, the amount of correlation data in each temperature range TR shown in FIG. 3 increases, making it possible to estimate the temperature rise amount Δt with high accuracy. Note that the above-mentioned first, second, third and subsequent isostatic pressure treatments are not limited to these orders. That is, the first time can be replaced with the n-th time (n is a natural number), the second time can be replaced with the m-th time (m is a natural number and m>n), and the third time can be replaced with the p-th time (p is a natural number and p>m). In this way, in the present embodiment, by cumulatively storing (updating) correlation data in past isostatic pressurization processes in the storage unit 503, the temperature increase in newly executed isostatic pressurization processes can be adjusted. It becomes possible to estimate the amount Δt with high accuracy.

In particular, in this embodiment, the pressure medium temperature setting unit 501 estimates in advance the temperature rise amount Δt of the pressure medium PM during the pressure increasing operation, and sets the target temperature Ti to be lower than the set temperature Ts in anticipation of the temperature rise amount Δt. The temperature control unit 502 adjusts the temperature of the pressure medium PM before the pressure increasing operation to the target temperature Ti. Therefore, it is possible to bring the temperature of the pressure medium PM after the pressure increase operation (temperature Tf after pressure increase) close to the set temperature Ts without suppressing the pressure increase rate in order to reduce the temperature rise of the pressure medium PM. It becomes possible to stably perform isostatic pressure treatment including pressure treatment and heating treatment on the object to be treated at a preset pressure Ps and a preset temperature Ts.

Further, in this embodiment, the storage unit 503 stores the compression ratio κT and the volumetric expansion coefficient αV of the pressure medium PM as pressure medium information, and the pressure medium temperature setting unit 501 stores the compression ratio κT and the volume expansion coefficient αV of the pressure medium PM, and the pressure medium temperature setting unit 501 stores the compression ratio κT and the volume expansion coefficient αV of the pressure medium PM. In the isostatic pressurization process (n is a natural number), the compressibility κT and volumetric expansion coefficient αV of the pressure medium PM stored in the storage unit 503, the set pressure Ps input to the operation unit 510, and the pressure sensor 16 are used. The temperature increase amount Δt is estimated based on the detected initial pressure Pi. According to such a configuration, in the first isostatic pressurization process, the temperature increase amount Δt of the pressure medium PM during the pressurization operation is determined based on the compression ratio κT and the volumetric expansion coefficient αV stored in advance in the storage unit 503. can be easily estimated.

Further, in the present embodiment, the temperature sensor 17 measures the post-pressure increase temperature Tf, which is the temperature of the pressure medium PM at the end of the pressure increase, which is after the pressure increase operation is performed and before the pressure maintenance operation is performed. It is possible to detect. The storage unit 503 also stores an actual temperature increase amount ΔT, which is the difference between the post-pressurization temperature Tf and the target temperature Ti, the set pressure Ps, and the initial pressure Pi in the first isostatic pressurization process. Correlation information with the actual pressure increase amount ΔP, which is the difference between the two, can be stored as the pressure medium information. Then, the pressure medium temperature setting unit 501 determines the difference between the set pressure Ps and the initial pressure Pi in the second (mth time: m is a natural number and m>n) isostatic pressurization treatment on the workpiece. The temperature increase amount is estimated based on the correlation information stored in the storage unit 503. According to such a configuration, in the second isostatic pressurization process, correlation information between the actual temperature increase ΔT and the actual pressure increase ΔP actually measured in the first isostatic pressurization process is used. , in order to estimate the temperature rise of the pressure medium PM during pressurization operation, compared to the case where the temperature rise Δt is estimated using the compressibility κT and the volumetric expansion coefficient αV, which are known physical property values of the pressure medium. , the amount of temperature rise Δt can be estimated with high accuracy according to the characteristics of the isostatic pressurizing device 1 used.

Furthermore, in the present embodiment, the storage unit 503 can update the correlation information by further storing the actual temperature increase amount ΔT and the actual pressure increase amount ΔP in the second isostatic pressurization process. . In addition, the pressure medium temperature setting unit 501 stores the difference between the set pressure Ps and the initial pressure Pi in the third (pth time: p is a natural number and p>m) isostatic pressurization treatment on the workpiece. The temperature increase amount Δt is estimated based on the updated correlation information stored in 503. According to such a configuration, in the third isostatic pressurization process, the plurality of actual temperature increase amounts ΔT and the plurality of actual pressure increase amounts ΔP actually measured in the first and second isostatic pressurization processes are By using the correlation information including the above, it is possible to estimate the temperature increase amount Δt of the pressure medium PM during the pressure increasing operation with higher accuracy.

Furthermore, in this embodiment, the storage unit 503 can store the correlation information in each of a plurality of preset temperature ranges TR. Then, the pressure medium temperature setting unit 501 selects one temperature range TR from among the plurality of temperature ranges TR in accordance with the set temperature Ts input to the operation unit 510, and selects the correlation information in the one temperature range TR. The temperature increase amount Δt is estimated based on the following. According to such a configuration, even if at least one of the compressibility κT and the volumetric expansion coefficient αV of the pressure medium changes greatly depending on the temperature, the actual temperature increase amount ΔT in the temperature range TR corresponding to the set temperature Ts By using the correlation information between the actual pressure increase amount ΔP and the actual pressure increase amount ΔP, it is possible to estimate the temperature increase amount of the pressure medium PM during the pressure increase operation with higher accuracy.

Further, the isostatic pressurization method according to the present embodiment is a method for performing isostatic pressurization treatment on an object to be treated using pressure medium PM. The isostatic pressurization method includes a process condition setting step, a preparation step, a temperature increase amount estimation step, a target temperature determination step, a temperature adjustment step, a pressure increase step, and a pressure maintenance step.
In the process condition setting step, a set temperature Ts and a set pressure Ps of the pressure medium PM during the isostatic pressurization process are set.
In the preparation process, a pressure vessel 11 in which a processing space S capable of receiving a pressure medium PM is formed, a pressure increase operation to increase the pressure of the pressure medium PM from atmospheric pressure to a set pressure Ps, and a pressure medium increase after the pressure increase operation is performed. A pressure booster 10 capable of performing a pressure maintenance operation to maintain the pressure of PM at a set pressure Ps, a pressure sensor 16 capable of detecting the pressure P of the pressure medium PM in the processing space S, and a processing space S. A temperature sensor 17 capable of detecting the temperature T of the pressure medium PM in the pressure medium PM is prepared.
In the temperature increase amount estimation step, the initial pressure Pi, which is the pressure of the pressure medium PM before the pressure increase operation, is calculated from the pressure medium information, which is information related to the volume expansion coefficient αV and the compression ratio κT of the pressure medium PM, and the set pressure Ps. By subtracting it, the amount of temperature rise Δt of the pressure medium PM caused by the pressure increasing operation is estimated.
In the target temperature determination step, a target temperature Ti of the pressure medium PM before the pressure increasing operation is determined based on the set temperature Ts and the estimated temperature increase amount Δt.
In the temperature adjustment step, the temperature of the pressure medium PM in the processing space S is adjusted to a target temperature Ti.
In the pressure increasing step, the pressure increasing operation is performed by the pressure increasing device 10 while the temperature of the pressure medium PM is adjusted to the target temperature Ti.
In the pressure maintaining step, the pressure maintaining operation is performed by the pressure increasing device 10 after the pressure increasing step.

According to such a method, the temperature increase amount Δt of the pressure medium PM during the pressure increase operation is estimated in advance and the temperature of the pressure medium PM before the pressure increase operation is adjusted in anticipation of the temperature increase amount Δt. In order to reduce the temperature rise of , it is possible to bring the temperature of the pressure medium PM close to the set temperature Ts after the end of the pressure increase operation without suppressing the pressure increase rate, and the pressurization process can be performed at the preset set pressure Ps and set temperature Ts. Also, it becomes possible to stably perform isostatic pressure treatment including heating treatment on the object to be treated.

Further, in the above method, the temperature increase amount estimation step includes a compression ratio κT and a volume expansion coefficient αV of the pressure medium PM in the first (nth time: n is a natural number) isostatic pressurization treatment on the workpiece. It is desirable to include estimating the temperature increase amount Δt based on the set pressure Ps and the initial pressure Pi.

According to such a method, in the first (nth) isostatic pressurization process, the temperature rise amount Δt of the pressure medium PM during the pressure increasing operation is determined based on the compression ratio κT and the volumetric expansion coefficient αV of the pressure medium PM. can be easily estimated.

In the above method, the actual temperature increase amount ΔT, which is the difference between the post-pressurization temperature Tf and the target temperature Ti, and the difference between the set pressure Ps and the initial pressure Pi in the first isostatic pressurization process is It further includes a recording step of recording correlation information, which is information indicating a correlation with the actual pressure increase amount ΔP, as the pressure medium information, and the temperature increase amount estimation step is carried out for the second time (mth time: m is In the isostatic pressurization process of a natural number and m>n), the method may further include estimating a temperature increase amount Δt based on the difference between the set pressure Ps and the initial pressure Pi and the recorded correlation information. desirable.

According to such a method, in the second (mth) isostatic pressure treatment, correlation information between the actual temperature increase ΔT and the actual pressure increase ΔP actually measured in the first isostatic pressure treatment is obtained. In order to estimate the temperature rise Δt of the pressure medium PM during pressurization operation using As a result, the amount of temperature rise can be estimated with high accuracy according to the characteristics of the isostatic pressurizing device used.

Further, in the above method, the recording step includes updating the correlation information by further recording the actual temperature increase amount ΔT and the actual pressure increase amount ΔP in the second isostatic pressurization process, The temperature increase amount estimation step is performed by calculating the difference between the set pressure Ps and the initial pressure Pi and the updated correlation in the third (pth time: p is a natural number and p>m) isostatic pressurization treatment on the workpiece. Preferably, the method further includes estimating the temperature increase amount Δt based on the information.

According to such a method, in the third (p-th) isostatic pressurization process, a plurality of actual temperature increases ΔT and a plurality of actual temperature rises ΔT actually measured in the first and second isostatic pressurization processes are By using the correlation information including the pressure increase amount ΔP, it is possible to estimate the temperature increase amount Δt of the pressure medium PM during the pressure increase operation with higher accuracy.

Further, in the above method, the recording step includes recording the correlation information in each of a plurality of preset temperature regions TR, and the temperature increase amount estimation step includes recording a plurality of correlation information corresponding to the set temperature Ts. It is preferable that the method includes selecting one temperature region TR out of the temperature regions TR and estimating the temperature increase amount Δt based on the correlation information in the one temperature region TR.

According to such a method, focusing on the fact that the ratio between the compressibility κT and the volumetric expansion coefficient αV of the pressure medium PM changes depending on the temperature, the actual temperature increase in the temperature range TR corresponding to the set temperature Ts is calculated. By using the correlation information between ΔT and the actual pressure increase amount ΔP, the temperature increase amount Δt of the pressure medium PM during the pressure increasing operation can be estimated with higher accuracy.

Although the isostatic pressurizing device 1 and the isostatic pressurizing method according to an embodiment of the present invention have been described above, the present invention is not limited to these aspects, and the following modified embodiments are also possible. is possible.

(1) Although the above embodiment has been described based on the case where the pressure medium PM is water, the pressure medium PM may be a medium other than water. Further, the storage unit 503 has a different storage area for each pressure medium PM, and when information regarding the type of pressure medium PM is input from the operation unit 510, pressure medium information corresponding to the input pressure medium PM is input. (compression ratio κT, volumetric expansion coefficient αV, correlation data) may be acquired from the storage unit 503. Similarly, different correlation data may be stored in the storage unit 503 depending on the pressure increase time of the pressure increase operation for the pressure medium PM.

(2) In the above embodiment, the compression ratio κT and the volumetric expansion coefficient αV are used as factors that affect the temperature increase amount Δt of the pressure medium PM. The pressure medium information (compressibility κT, volumetric expansion coefficient αV, correlation data) may be classified according to information regarding heat dissipation and stored in the storage unit 503. In this case, it becomes possible to estimate the temperature rise amount Δt with even higher accuracy.

1 Isostatic pressurizing device 10 Pressurizing device (pressurizing mechanism)
11 Pressure vessel 13 Hydraulic unit 14 Directional switching valve 15 Hydraulic pump 16 Pressure sensor (pressure detection section)
17 Temperature sensor (temperature detection section)
21 Heating device (temperature adjustment mechanism)
22 Cooling device (temperature adjustment mechanism)
50 Control unit 501 Pressure medium temperature setting unit (temperature increase amount estimation unit, target temperature determination unit)
502 Temperature control section 503 Storage section (pressure medium information storage section)
504 Display input section 505 Judgment section 510 Operation section (setting information input section)
511 Display part PM Pressure medium S Internal space

Claims (10)

An isostatic pressurizing device that performs isostatic pressurizing treatment on a workpiece using a pressure medium,
a pressure vessel in which a processing space capable of receiving a pressure medium is formed;
a setting information input unit that receives input of a set temperature and a set pressure of the pressure medium during the isostatic pressurization process;
The pressurizing mechanism is capable of pressurizing the pressure medium in the processing space, and includes a pressurizing operation for increasing the pressure of the pressure medium in the processing space from atmospheric pressure to the set pressure, and a pressurizing mechanism that increases the pressure of the pressure medium in the processing space after the pressurizing operation. a pressurizing mechanism capable of performing a pressure maintaining operation to maintain the pressure at the set pressure;
a temperature adjustment mechanism capable of adjusting the temperature of the pressure medium in the processing space;
a pressure detection unit capable of detecting the pressure of the pressure medium in the processing space;
a temperature detection unit capable of detecting the temperature of the pressure medium in the processing space;
a pressure medium information storage unit that stores pressure medium information that is information related to the compression ratio and volumetric expansion coefficient of the pressure medium;
the pressure medium information stored in the pressure medium information storage unit, the set pressure input to the setting information input unit, and an initial pressure that is the pressure of the pressure medium detected by the pressure detection unit before the pressure increase operation; a temperature rise amount estimating unit that estimates a temperature rise amount of the pressure medium caused by the pressure increase operation based on;
a target temperature determining unit that determines a target temperature of the pressure medium before the pressure increasing operation by subtracting the temperature increase amount estimated by the temperature increase amount estimating unit from the set temperature;
a temperature control unit that controls the temperature adjustment mechanism to adjust the temperature of the pressure medium in the processing space to the target temperature determined by the target temperature determination unit;
An isostatic pressurizing device comprising: The pressure medium information storage unit stores a compression ratio and a volumetric expansion coefficient of the pressure medium as the pressure medium information,
The temperature increase amount estimating unit calculates the compression ratio and volumetric expansion coefficient of the pressure medium stored in the pressure medium information storage unit and the settings in the n-th (n is a natural number) isostatic pressurization treatment on the workpiece. The isostatic pressurization device according to claim 1, wherein the temperature increase amount is estimated based on the set pressure input to the information input section and the initial pressure detected by the pressure detection section. The temperature detection unit is capable of detecting a post-pressurization temperature that is the temperature of the pressure medium at the end of the pressure increase, which is after the pressure increase operation is performed and before the pressure maintenance operation is performed,
The pressure medium information storage unit stores an actual temperature increase amount, which is a difference between the temperature after pressurization and the target temperature, and a difference between the set pressure and the initial pressure, in the n-th isostatic pressurization process. It is possible to store correlation information, which is information indicating a correlation with the actual pressure increase amount, as the pressure medium information,
The temperature increase amount estimating unit stores the difference between the set pressure and the initial pressure and the pressure medium information storage unit in the m-th (m is a natural number and m>n) isostatic pressurization treatment on the workpiece. The isostatic pressurizing device according to claim 2, wherein the temperature increase amount is estimated based on the stored correlation information. The pressure medium information storage unit can update the correlation information by further storing the actual temperature increase amount and the actual pressure increase amount in the m-th isostatic pressurization process,
The temperature increase amount estimating unit stores the difference between the set pressure and the initial pressure and the pressure medium information storage unit in the p-th (p is a natural number and p>m) isostatic pressurization treatment on the workpiece. The isostatic pressurization device according to claim 3, wherein the temperature increase amount is estimated based on the updated correlation information that is stored. The pressure medium information storage unit is capable of storing the correlation information in each of a plurality of preset temperature regions,
The temperature increase amount estimating unit selects one temperature range from the plurality of temperature ranges in response to the set temperature input to the setting information input unit, and based on the correlation information in the one temperature range. The isostatic pressurizing device according to claim 3 or 4, wherein the temperature increase amount is estimated by An isostatic pressurization method for performing isostatic pressurization treatment on a workpiece using a pressure medium, the method comprising:
a processing condition setting step of setting a set temperature and a set pressure of the pressure medium during the isostatic pressure treatment;
A pressure vessel in which a processing space capable of receiving a pressure medium is formed, a pressure raising operation for increasing the pressure of the pressure medium from atmospheric pressure to the set pressure, and maintaining the pressure of the pressure medium at the set pressure after the pressure raising operation. A pressurizing mechanism capable of performing a pressure maintaining operation, a pressure detection unit capable of detecting the pressure of the pressure medium in the processing space, and a temperature capable of detecting the temperature of the pressure medium in the processing space. a preparation step of preparing the detection section, and
The temperature of the pressure medium caused by the pressure increase operation is based on pressure medium information that is information related to the compressibility and volumetric expansion coefficient of the pressure medium, the set pressure, and the initial pressure that is the pressure of the pressure medium before the pressure increase operation. a temperature increase amount estimation step of estimating the amount of increase;
a target temperature determining step of determining a target temperature of the pressure medium before the pressure increasing operation by subtracting the estimated temperature increase amount from the set temperature;
a temperature adjustment step of adjusting the temperature of the pressure medium in the processing space to the target temperature;
a pressurizing step of performing the pressurizing operation by the pressurizing mechanism in a state where the temperature of the pressure medium is adjusted to the target temperature;
a pressure maintaining step in which the pressure maintaining operation is performed by the pressurizing mechanism after the pressure increasing step;
An isostatic pressurization method comprising: The temperature increase amount estimating step is performed based on the compressibility and volumetric expansion coefficient of the pressure medium, the set pressure, and the initial pressure in the n-th (n is a natural number) isostatic pressurization treatment of the object to be treated. The isostatic pressurization method according to claim 6, comprising estimating an amount of temperature increase. In the n-th isostatic pressurization process, the actual temperature increase amount, which is the difference between the target temperature and the post-pressure increase temperature, which is the temperature of the pressure medium after the pressure increase operation and before the pressure maintenance operation, and the set pressure. further comprising a recording step of recording correlation information, which is information indicating a correlation with an actual pressure increase amount that is a difference from the initial pressure, as the pressure medium information,
The temperature increase amount estimating step includes calculating the difference between the set pressure and the initial pressure and the recorded correlation information in the m-th (m is a natural number and m>n) isostatic pressurization treatment on the workpiece. The isostatic pressurization method according to claim 7, further comprising estimating the temperature increase amount based on. The recording step includes updating the correlation information by further recording the actual temperature increase amount and the actual pressure increase amount in the m-th isostatic pressure treatment,
The temperature increase amount estimating step includes calculating the difference between the set pressure and the initial pressure and the updated correlation information in the p-th (p is a natural number and p>m) isostatic pressurization treatment on the workpiece. The isostatic pressurization method according to claim 8, further comprising estimating the temperature increase amount based on. The recording step includes recording the correlation information in each of a plurality of preset temperature regions,
The temperature increase amount estimating step includes selecting one temperature region from the plurality of temperature regions corresponding to the set temperature and estimating the temperature increase amount based on the correlation information in the one temperature region. The isostatic pressurization method according to claim 8 or 9, comprising:

Images