CN-122008622-A - Temperature control and pressure control method of temperature isostatic pressing machine

CN122008622ACN 122008622 ACN122008622 ACN 122008622ACN-122008622-A

Abstract

The invention discloses a temperature control and pressure control method of a temperature isostatic pressing machine, which comprises the steps of arranging a high-pressure heating device on a high-pressure pipeline between a working cylinder and a booster, wherein the booster is communicated with a low-temperature liquid inlet pipe through a hydraulic pump, and when the temperature isostatic pressing machine works, low-temperature liquid is injected into the high-pressure heating device through the hydraulic pump and the booster at a process set pressure, and the liquid heated by the high-pressure heating device is injected into the working cylinder at a process set temperature and a process set pressure. The method ensures that the liquid passing through the supercharger is low-temperature liquid, and does not generate high-temperature creep and sealing failure on related parts of the supercharger flowing through the supercharger in the supercharging process, thereby ensuring the operation safety of equipment and the quality of processed products.

Inventors

Bi Wanyou
CHEN PINGSONG
CHENG FENG
Sun Miaolin
WEN MING
Deng Zheren

Assignees

湖南维尚科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260304

Claims (10)

1. The temperature control and pressure control method for the temperature isostatic pressing machine is characterized by comprising the steps of arranging a high-pressure heating device on a high-pressure pipeline (9) between a working cylinder (1) and a booster (2), wherein the booster (2) is communicated with a low-temperature liquid inlet pipe (10) through a hydraulic pump (3), and when the temperature isostatic pressing machine works, low-temperature liquid is injected into the high-pressure heating device through the hydraulic pump (3) and the booster (2) by a process set pressure, and the liquid heated by the high-pressure heating device is injected into the working cylinder (1) by a process set temperature and a process set pressure.
2. The temperature and pressure control method of a temperature isostatic press according to claim 1, further comprising the additional step of adding an atmospheric heating mechanism, comprising the steps of: S1, filling normal pressure liquid meeting the process set temperature into a working cylinder (1) by a normal pressure heating mechanism; S2, filling the liquid meeting the process set temperature into the working cylinder (1) at high pressure by the hydraulic pump (3), the booster (2) and the high-pressure heating device, so that the liquid meeting the process set temperature in the working cylinder (1) gradually reaches the process set pressure; and S3, continuously working the hydraulic pump (3), the booster (2) and the high-pressure heating device, so that the liquid in the working cylinder (1) keeps the process set temperature and the process set pressure.
3. The temperature and pressure control method of a hot isostatic press according to claim 1 or 2, characterized in that the high-pressure heating device comprises a high-pressure heater (4), the high-pressure pipeline (9) is divided into a first high-pressure low-temperature pipeline (901) positioned between the high-pressure heater (4) and the booster (2) and a second high-pressure high-temperature pipeline (902) positioned between the high-pressure heater (4) and the working cylinder (1), the high-pressure heater (4) is provided with a tubular heating cavity (401), two ends of the heating cavity (401) are respectively provided with a liquid inlet hole (402) communicated with the first high-pressure low-temperature pipeline (901) and a liquid outlet hole (403) communicated with the second high-pressure high-temperature pipeline (902), and the heating cavity (401) is provided with a first heater (22).
4. A temperature and pressure control method of a warm isostatic press according to claim 3, characterized in that the aperture of the heating chamber (401) is made larger than the aperture of the liquid inlet hole (402) and the aperture of the liquid outlet hole (403).
5. A temperature control and pressure control method of a temperature isostatic pressing machine according to claim 3, further comprising the steps of arranging a normal pressure temperature testing container (6) communicated with a high pressure high temperature pipeline II (902) and arranging a temperature detector I (19) in the normal pressure temperature testing container (6), arranging a temperature testing pipeline (12) communicated with the normal pressure temperature testing container (6) on the high pressure high temperature pipeline II (902), arranging a valve I (15) on a section of the high pressure high temperature pipeline II (902) between the temperature testing pipeline (12) and the working cylinder (1), and arranging a valve II (16) on the temperature testing pipeline (12).
6. The temperature and pressure control method of a warm isostatic press according to claim 5, characterized in that the temperature detection is performed before the liquid output via the high-pressure heater (4) is injected into the working cylinder (1) as follows: S01, closing a valve I (15), and opening a valve II (16) to enable liquid output by the high-pressure heater (4) to be injected into the normal-pressure temperature testing container (6); s02, acquiring a liquid temperature value through a first temperature detector (19), and adjusting the output power of a heater to enable the liquid temperature value to reach and be maintained in a value range of a process set temperature; s03, opening the valve I (15), closing the valve II (16), and injecting the liquid meeting the process set temperature into the working cylinder (1).
7. The temperature control and pressure control method of a temperature isostatic pressing machine according to claim 5, wherein a thermal contact (404) for reflecting the temperature of the heating cavity (401) is arranged outside the heating cavity (401), a second temperature detector (20) attached to the thermal contact (404) is arranged, display data of the second temperature detector (20) and display data of the first temperature detector (19) are obtained before pressurization is implemented, and the corresponding relation of the two data is determined, and the method comprises the following steps: s001, closing a valve I (15), and opening a valve II (16) to enable liquid output by the high-pressure heater (4) to be injected into the normal-pressure temperature testing container (6); S002, acquiring a liquid temperature value y through a first temperature detector (19), enabling the liquid temperature value y to reach and be maintained in a value range of a process set temperature through adjusting the output power of a heater, and acquiring a change range of a temperature value x of a thermal contact (404) through a second temperature detector (20); S003, simultaneously recording the value range of a liquid temperature value y which accords with the process set temperature, the value range of a temperature value x of a thermal contact (404) and the environment temperature during testing, and particularly recording the data of x corresponding to a plurality of data points of y in the value range; s004, stopping working of the hydraulic pump (3) and the high-pressure heater (4), and closing the valve II (16).
8. The temperature and pressure control method of the warm isostatic pressing machine according to claim 2, wherein the normal pressure heating mechanism comprises a normal pressure heating container (7), a normal pressure high temperature pipeline (13) which is communicated with the normal pressure heating container (7) and the working cylinder (1), a conveying pump (8) which is arranged on the normal pressure high temperature pipeline (13) and a valve III (17) which is arranged on the normal pressure high temperature pipeline (13) between the conveying pump (8) and the working cylinder (1), and a heater II (23) is arranged in the normal pressure heating container (7).
9. The temperature and pressure control method of a warm isostatic press according to claim 1, further comprising providing a normal pressure low temperature container (5) communicating with the liquid inlet end of the low temperature liquid inlet pipe (10), providing a cooling pipeline (11) between the low temperature container (5) and the working cylinder (1), providing a heat exchanger (1101) for cooling on the cooling pipeline (11), and allowing liquid discharged from the working cylinder (1) to flow into the low temperature container (5) through the cooling pipeline (11) and the heat exchanger (1101).
10. A temperature and pressure control method of a thermo-isostatic press according to claim 1, characterized in that a heater three (24) for maintaining the temperature of the liquid in the working cylinder (1) is arranged outside the wall of the working cylinder (1).

Description

Temperature control and pressure control method of temperature isostatic pressing machine Technical Field The invention relates to a temperature and pressure control method of a temperature isostatic pressing machine, and belongs to the technical field of isostatic pressing processing equipment. Background The temperature isostatic pressing machine is widely applied in the fields of new material research and development and production by virtue of material densification and performance optimization capability under the synergistic effect of high temperature and high pressure, and covers the key industries of aerospace, new energy, electronics, medical treatment, metallurgy and the like, and along with the development of new material requirements to high performance, micro-nano structure and compounding, the industry also provides higher requirements on the pressure (more than or equal to 500 MPa) and the temperature (more than or equal to 85 ℃) of equipment. The working principle of the temperature isostatic pressing machine is that the material to be processed is placed in a working cylinder after being vacuum sealed by a sheath, and high-temperature working mediums such as water and oil in the isostatic pressing machine are used for applying uniform pressure (more than or equal to 500 MPa) to all directions of the material, so that the rearrangement of particles and the reduction of pores in the material are promoted, and the densification is realized, so that the highly uniform material is produced. The heating and pressurizing mechanism of the traditional temperature isostatic pressing machine is generally characterized in that a heater is arranged outside a working cylinder wall, a hydraulic pump, a pressurizer and an atmospheric heating container are arranged, the hydraulic pump and the pressurizer are positioned between the atmospheric heating container and the working cylinder and are respectively communicated with the atmospheric heating container and the working cylinder through pipelines, when the temperature isostatic pressing machine works, low-temperature liquid is injected into the working cylinder in which products are placed, the temperature of the working cylinder is heated to reach a set process set temperature by the heater, meanwhile, the liquid in the atmospheric heating container is heated to the set process set temperature by the atmospheric heating container, then the hydraulic pump and the pressurizer are started, and the high-temperature liquid in the heating melter is fed into the working cylinder by the hydraulic pump and the pressurizer, so that the hydraulic pressure in the working cylinder is increased to the set process set pressure. In the other mode, only the hydraulic pump, the booster and the normal pressure heating container are arranged outside the wall of the working cylinder, the hydraulic pump and the booster are positioned between the normal pressure heating container and the working cylinder and are respectively communicated with the normal pressure heating container and the working cylinder through pipelines, and when the working device works, the hydraulic pump and the booster directly charge high-temperature liquid in the heating melter into the working cylinder, so that the temperature and the pressure of the liquid in the working cylinder reach and are maintained at process set values. In the form, high-temperature liquid passes through the hydraulic pump and the supercharger, and when the high-temperature liquid flows through related parts of the supercharger under the working conditions of high temperature and ultrahigh pressure, the high-temperature liquid is subjected to high-temperature creep and sealing failure in the supercharging process, so that the safety and the reliability of the operation of the supercharger are seriously affected, and the process stability is seriously affected. Disclosure of Invention The invention aims to solve the technical problems of preventing the supercharger from being threatened by high temperature under the working condition, and ensuring the operation safety of equipment and the processing quality of products. Aiming at the problems, the technical scheme provided by the invention is as follows: A temperature control and pressure control method for a temperature isostatic pressing machine comprises the steps that a high-pressure heating device is arranged on a high-pressure pipeline between a working cylinder and a booster, the booster is communicated with a low-temperature liquid inlet pipe through a hydraulic pump, and when the temperature isostatic pressing machine works, low-temperature liquid is injected into the high-pressure heating device through the hydraulic pump and the booster at a process set pressure, and the liquid heated by the high-pressure heating device is injected into the working cylinder at the process set temperature and the process set pressure. The temperature control and pressure control metho