CN215746357U - Pressure regulation control system for full-function antigravity casting - Google Patents
Pressure regulation control system for full-function antigravity casting Download PDFInfo
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- CN215746357U CN215746357U CN202122414680.XU CN202122414680U CN215746357U CN 215746357 U CN215746357 U CN 215746357U CN 202122414680 U CN202122414680 U CN 202122414680U CN 215746357 U CN215746357 U CN 215746357U
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Abstract
The utility model discloses a pressure regulation control system for full-function antigravity casting, which can realize pressure regulation and control of all casting processes of antigravity casting, and comprises antigravity casting equipment consisting of an upper pressure container, a lower pressure container and a vacuum buffer tank, and a pressure regulation module, wherein the pressure regulation module comprises a central controller, a stop valve, a digital valve bank and a differential pressure sensor; the central controller is connected with the stop valve, the digital valve group and the differential pressure sensor, and the differential pressure sensor is connected with the upper pressure container and the lower pressure container. The pressure difference sensor detects the pressure difference of the upper pressure tank and the lower pressure tank in real time and transmits the pressure difference to the central controller, the stop valve, the digital valve group and the pressure difference sensor form a closed-loop control system, the pressure difference of the upper pressure container and the lower pressure container is adjusted and controlled in real time, and the pressure adjustment and control of all casting processes of the antigravity casting are realized.
Description
Technical Field
The utility model relates to the technical field of casting molding, in particular to a pressure regulation control system suitable for all casting processes of antigravity casting.
Background
The antigravity casting generally refers to a casting method for completing the processes of mold filling, feeding and solidification of liquid metal under the action of force in the direction opposite to the gravity, and comprises various process forms such as low-pressure casting, counter-pressure casting, pressure-regulating casting, vacuum suction casting and the like. The antigravity casting process has wide applicability, can be used for various alloy materials such as aluminum alloy, magnesium alloy, copper alloy, titanium alloy, high-temperature alloy and the like, is an important casting forming process technology for producing high-strength, high-quality and complex castings, has stronger and stronger requirements on high-performance, high-quality and complex-structure casting products in the fields of aviation, aerospace, automobiles, rail transit, weaponry and the like under the promotion of the continuous development of high-end equipment at home and abroad, and provides wide space for the development of the antigravity casting technology.
After years of research, China obtains numerous research results in the antigravity casting technology, various antigravity casting equipment is developed successively and applied to actual production, the field of civil products such as automobile hubs and the like by low-pressure casting is close to the foreign advanced level, and differential pressure casting and pressure-regulating casting are mainly used for large-scale complex components, but the equipment is expensive, the process technology is complex, and the application is limited. In order to save the cost of casting equipment, fully exert the advantages of antigravity casting and adapt to the production of different castings, the requirement of multifunctional or full-function composite antigravity equipment is stronger and stronger, and the core technology of the equipment lies in the regulation and control of the pressure in the full-function antigravity casting process.
Disclosure of Invention
The utility model provides a pressure regulating and controlling system for a full-function antigravity casting process, which has a simple structure and aims to solve the problem that the pressure regulating and controlling system of the existing antigravity casting equipment has single or incomplete function.
The utility model relates to a pressure regulation control system for full-function antigravity casting, which comprises antigravity casting equipment and a pressure regulation module;
the antigravity casting equipment comprises an upper pressure container, a lower pressure container and a vacuum buffer tank;
the pressure regulating module comprises a central controller, a stop valve, a digital valve group and a differential pressure sensor; the central controller is in control connection with the stop valve, the digital valve group and the differential pressure sensor to form a closed-loop control system, and the differential pressure sensor detects the pressure difference of the upper pressure tank and the lower pressure tank in real time and transmits the pressure difference to the central controller; the central controller adjusts and controls the pressure difference of the upper pressure tank and the lower pressure tank in real time according to different antigravity casting processes and set pressurization curves, so as to realize the antigravity casting pressure adjustment and control. The stop valves comprise a first stop valve, a second stop valve, a third stop valve, a fourth stop valve and a fifth stop valve; the digital valve group comprises a first digital valve, a second digital valve and a third digital valve.
The first stop valve is communicated with an air source, and the first stop valve, the first digital valve and the second stop valve are communicated with the lower pressure container in sequence; the first stop valve, the first digital valve and the second stop valve form a low-pressure casting pressure regulation control system or a lower pressure container pressurization speed regulation control system during pressure-regulating casting.
The second digital valve is communicated with the atmosphere, and the second digital valve, the fourth stop valve and the upper pressure container are communicated in sequence; the third stop valve is respectively communicated with the fourth stop valve and the second stop valve; the stop valve controls the circulation of the gas circuit, and the second digital valve controls the circulation capacity of the gas circuit to realize the mold filling process of the differential pressure casting. The pressure regulating and controlling system in the differential pressure casting mold filling process is composed of a second digital valve and a fourth stop valve, and the differential pressure casting synchronous air inlet pressure regulating and controlling system is composed of a first stop valve, a third stop valve, a fourth stop valve, a second stop valve and a first digital valve.
The third digital valve and the fifth stop valve form a pressure reducing pressure regulating control system of the upper pressure container during vacuum suction casting or a synchronous pressure reducing pressure regulating control system of the upper pressure container and the lower pressure container during pressure regulating casting: the third digital valve is connected between the vacuum buffer tank and the upper pressure container and controls the vacuum pumping speed of the upper pressure container; the fifth stop valve is connected between the lower pressure container and the vacuum buffer tank, and is used for controlling the gas circulation between the lower pressure container and the vacuum buffer tank so as to realize the vacuum suction casting process; meanwhile, the gas circuit controls the synchronous pressure reduction of the upper pressure container and the lower pressure container in the synchronous pressure reduction stage of pressure-regulating casting.
In all antigravity casting processes, a antigravity casting pressure regulation curve is stored in a central controller, the central controller acquires data of pressure difference sensors connected with an upper pressure tank and a lower pressure tank to obtain pressure difference between the upper pressure tank and the lower pressure tank, and after the pressure difference is compared with the stored pressurization curve, the pressure difference between an upper pressure container and a lower pressure container is regulated and controlled by controlling the on-off of an electromagnetic valve in a corresponding digital valve and the on-off of a stop valve, so that the pressure difference between the upper pressure container and the lower pressure container is regulated according to a set process curve and is controlled within a set error range.
The pressure control device further comprises a fourth digital valve, wherein the fourth digital valve is communicated with an air source and is communicated with a fourth stop valve, and the pressure control device can control the pressure of the upper pressure container; a fourth digital valve and a fourth stop valve form a gas supplementing adjusting control system when the upper pressure container leaks in the antigravity casting process and a pressurizing speed adjusting control system when the pressure regulating casting is carried out;
further, the device also comprises a sixth stop valve; and the second stop valve, the third stop valve, the fourth stop valve group and the sixth stop valve form a countergravity casting exhaust process pressure regulation control system.
Furthermore, the stop valve is a one-way pneumatic stop valve, controls the flow direction of the gas circuit in different antigravity casting processes, and is matched with a corresponding digital valve bank to realize different antigravity casting processes. The digital valve group is a one-way electromagnetic valve group and is used for adjusting the through-flow capacity of pipelines in different antigravity casting processes.
The utility model realizes the purpose of one machine with multiple functions by utilizing the mutual coordination of the combination valve and the stop valve, has the pressure regulation and control in all antigravity casting processes including low-pressure casting, differential pressure casting, pressure-regulating casting and vacuum suction casting, can adopt different antigravity casting processes to produce according to the requirements of various complex components, greatly expands the functions of antigravity casting equipment, greatly simplifies the structure compared with the prior art and saves the cost. When the gas circuit leaks in the antigravity casting process, the gas can be supplied to the upper pressure container and the lower pressure container in real time, the adaptability of antigravity casting equipment is improved, and the antigravity casting pressure regulating control system is a full-function composite antigravity casting pressure regulating control system. The utility model can also provide a necessary means for formulation and optimization of the casting production process.
Drawings
FIG. 1 is a block diagram of a countergravity casting pressure regulation control system according to an embodiment of the present invention.
In the figure: the system comprises a first stop valve 1, a second stop valve 2, a third stop valve 3, a fourth stop valve 4, a fifth stop valve 5, a sixth stop valve 6, a first digital valve 7, a second digital valve 8, a third digital valve 9, a fourth digital valve 10, a central controller 11, an upper pressure container 12, a lower pressure container 13, a vacuum buffer tank 14 and a differential pressure sensor 15.
Detailed Description
The countergravity casting pressure regulation control system according to the present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.
Referring to the attached drawing 1, the full-function antigravity casting pressure regulation control system is used in cooperation with antigravity casting equipment, and can regulate and control the pressure of casting and mold filling processes such as low-pressure casting, counter-pressure casting, pressure-regulating casting, vacuum suction casting and the like. The antigravity casting equipment comprises an upper pressure container 12, a lower pressure container 13 and a vacuum buffer tank 14; the vacuum buffer tank 14 is used for presetting vacuum degree during vacuum suction casting or pressure-regulating casting; the differential pressure sensor 15 collects the pressure difference between the upper and lower pressure vessels 13 in real time and transmits the detected pressure difference to the central controller 11. The pressure regulating system comprises a central controller 11, and a stop valve, a digital valve group and a differential pressure sensor 15 which are in control connection with the central controller 11. The stop valve is a one-way pneumatic stop valve; the digital valve group is a one-way electromagnetic valve group.
The existing pressure regulation control system cannot adapt to various mold filling processes, if a normally installed digital valve is installed reversely in a certain mold filling process of anti-gravity casting equipment, gas channel gas leakage is easy to generate, so that the gas channel design is realized completely, stop valves are added on the gas channel design and are mutually coordinated and matched in the gas channel, and the gas channel is guaranteed to complete regulation and stop according to the set function. The stop valves comprise a first stop valve 1, a second stop valve 2, a third stop valve 3, a fourth stop valve 4, a fifth stop valve 5, a sixth stop valve 6 and a sixth stop valve for final exhaust; the digital valve group comprises a first digital valve 7, a second digital valve 8 and a third digital valve 9.
The first stop valve 1 is communicated with an air source, the first stop valve 1, the first digital valve 7 and the second stop valve 2 are sequentially communicated with the lower pressure container 13, and the installation direction of the second stop valve 2 faces to the lower pressure container 13;
the second digital valve 8 is communicated with the atmosphere, the second digital valve 8, the fourth stop valve 4 and the upper pressure container 12 are communicated in sequence, and the installation direction of the fourth stop valve 4 faces the upper pressure container 12; the third stop valve 3 is respectively communicated with the fourth stop valve 4 and the second stop valve 2;
the third digital valve 9 is connected between the vacuum buffer tank 14 and the upper pressure container 12; the fifth shut-off valve 5 is connected between the lower pressure vessel 13 and the vacuum buffer vessel 14.
The first embodiment is as follows: referring to the attached drawing 1, when the full-function antigravity casting pressure regulation control system implements low-pressure casting, a first stop valve 1 is connected with a first digital valve 7 and a gas source (Ps), a second stop valve 2 is connected with the first digital valve 7 and a lower pressure container 13, the first stop valve 1 and the second stop valve 2 control the circulation of a gas path, and the first digital valve 7 controls the speed of filling the mold for low-pressure casting. Meanwhile, the gas circuit plays a role in adjusting and controlling the pressurizing speed of the lower pressure container 13 in the synchronous pressurizing stage of pressure-regulating casting.
Example two: referring to fig. 1, when the full-function antigravity casting pressure regulation control system implements counter-pressure casting, firstly, a gas circuit in the first embodiment is combined with a fourth stop valve 4 and a third stop valve 3 (the third stop valve 3 is communicated, namely, has a synchronous function) to control a synchronous gas inlet process in the counter-pressure casting; then, the fourth stop valve 4 controls the circulation of the gas circuit, the second digital valve 8 controls the circulation capacity of the gas circuit, the mold filling process of the differential pressure casting is realized, then the pressure is maintained, and finally the air is exhausted and the pressure is released.
During differential pressure casting, the left pressure of the first digital valve 8 is greater than the right pressure, and at the moment, the first digital valve 8 is open to the atmosphere, and the installation direction is →; and during vacuum casting, the left pressure of the first digital valve 8 is smaller than the right pressure, and the fourth stop valve 4 is added because the installation direction thereof is →, so that complete stop of the first digital valve 8 cannot be guaranteed, and the installation direction of the fourth stop valve 4 is opposite to the direction of the first digital valve 8, so that the gas circuit can be completely stopped during vacuum casting (the stop function is not completed by the digital valve 8).
Example three: referring to the attached drawing 1, when the full-function antigravity casting pressure regulation control system implements vacuum suction casting, firstly, the vacuum suction speed of the upper pressure container 12 is controlled through the third digital valve 9 connected with the vacuum buffer tank 14 and the upper pressure container 12, and the circulation of the lower pressure container 13 and the vacuum buffer tank 14 is controlled through the fifth stop valve 5, so that the vacuum suction casting process is realized; meanwhile, the gas circuit controls the synchronous pressure reduction of the upper pressure container 13 and the lower pressure container 13 in the synchronous pressure reduction stage of pressure-regulating casting. The vacuum buffer tank 14 is preliminarily brought to a certain degree of vacuum at the time of vacuum suction casting or vacuum counter-pressure casting.
Example four: referring to fig. 1, when the full-function antigravity casting pressure regulation control system implements pressure regulation casting, the gas circuit in the third embodiment is used to complete synchronous pressure reduction of the upper pressure container 12 and the lower pressure container 13, when the upper pressure container 12 and the lower pressure container 13 reach a certain vacuum degree, the gas circuit in the first embodiment is used to control the pressurization speed of the lower pressure container 13, so as to complete the mold filling process of pressure regulation casting, and after mold filling is completed, the gas circuit in the combination of the upper pressure container 12 and the lower pressure container 13 in the first embodiment is used to complete synchronous pressurization of the upper pressure container 12 and the lower pressure container 13 until pressure maintaining pressure is reached. The pressurizing gas path of the upper pressure container 12 consists of a fourth digital valve 10 and a fourth stop valve 4 which are connected between a gas source and the upper pressure container 12, the fourth stop valve 4 controls the circulation of the gas path, and the fourth digital valve 10 regulates and controls the pressurizing speed of the upper pressure container 12 so as to realize the synchronous pressurizing of the upper pressure container 12 and the lower pressure container 13. Meanwhile, the pressurization gas circuit of the upper pressure container 12 can also realize the real-time gas supplementing effect when the gas circuit connected with the upper pressure container 12 has leakage.
Example five: referring to the attached drawing 1, in the process of implementing antigravity casting by the full-function antigravity casting pressure regulation control system, when the exhaust pressure is released, the process can be completed through an exhaust gas path composed of a sixth stop valve 6, a third stop valve 3, a fourth stop valve 4 and a second stop valve 2, the fourth stop valve 4 and the second stop valve 2 are respectively connected with an upper pressure container 12 and a lower pressure container 13, the third stop valve 3 is connected with the fourth stop valve 4 and the second stop valve 2, the sixth stop valve 6 is connected with the third stop valve 3 and the second stop valve 2, and the exhaust process during different antigravity casting can be realized through the on-off control of the stop valves.
In the antigravity casting process, the pressure difference between the upper pressure container 12 and the lower pressure container 13 is obtained by the central controller 11 through collecting the pressure difference sensor 15 connected between the upper pressure container 12 and the lower pressure container 13, the central controller 11 calculates the set theoretical pressure difference between the upper pressure container 12 and the lower pressure container 13 according to the antigravity pressurizing process curve stored in advance, compares the theoretical pressure difference with the collected pressure difference, controls the on-off of the gas path through the corresponding stop valve according to each antigravity casting process, and adjusts and controls the flow capacity of the gas path through the corresponding digital valve, so that each corresponding antigravity casting process is realized.
Although the utility model herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (4)
1. The utility model provides a pressure regulation control system of full function antigravity casting process which characterized in that: the device comprises anti-gravity casting equipment and a pressure adjusting module;
the antigravity casting equipment comprises an upper pressure container, a lower pressure container and a vacuum buffer tank;
the pressure regulating module comprises a central controller, a stop valve, a digital valve group and a differential pressure sensor; the central controller is in control connection with the stop valve, the digital valve bank and the differential pressure sensor; the pressure difference sensor detects the pressure difference between the upper pressure tank and the lower pressure tank in real time and transmits the pressure difference to the central controller; the stop valves comprise a first stop valve, a second stop valve, a third stop valve, a fourth stop valve and a fifth stop valve; the digital valve group comprises a first digital valve, a second digital valve and a third digital valve;
the first stop valve is communicated with an air source, and the first stop valve, the first digital valve and the second stop valve are communicated with the lower pressure container in sequence;
the second digital valve is communicated with the atmosphere, and the second digital valve, the fourth stop valve and the upper pressure container are communicated in sequence; the third stop valve is respectively communicated with the fourth stop valve and the second stop valve;
the third digital valve is connected between the vacuum buffer tank and the upper pressure container; the fifth stop valve is connected between the lower pressure container and the vacuum buffer tank.
2. The fully functional countergravity casting process pressure regulation control system of claim 1, wherein: a fourth digital valve; and the fourth digital valve is communicated with an air source and is connected with the fourth stop valve, so that the pressure of the upper pressure container can be controlled.
3. The fully functional countergravity casting process pressure regulation control system of claim 1, wherein: the device also comprises a sixth stop valve; and the sixth stop valve is communicated with the atmosphere and is respectively communicated with the third stop valve and the second stop valve.
4. A pressure regulation control system for a fully functional countergravity casting process according to any one of claims 1 to 3, wherein: the stop valve is a one-way pneumatic stop valve; the digital valve group is a one-way electromagnetic valve group.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113732269A (en) * | 2021-10-08 | 2021-12-03 | 江苏天宏智能装备有限公司 | Pressure regulation control system and method for full-function antigravity casting |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113732269A (en) * | 2021-10-08 | 2021-12-03 | 江苏天宏智能装备有限公司 | Pressure regulation control system and method for full-function antigravity casting |
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