阅读说明：本技术 一种钛合金机匣铸造过程冒口动态加热系统及方法 (Dynamic riser heating system and method in casting process of titanium alloy casing ) 是由 王彦菊 沙爱学 张美娟 崔敏超 姚倡锋 谭靓 于 2020-10-30 设计创作，主要内容包括：本发明公开了一种钛合金机匣铸造过程冒口动态加热系统及方法,包括依次套装于型砂的冒口外侧的石墨套、加热线圈、绝热套、不锈钢保护套；还包括LIBS夹持机构、LIBS装置、红外测温仪、测温仪夹持机构、工控机和感应加热电源。本发明通过LIBS装置实时监测冒口处液态钛合金的化学成分,通过工控机对化学成分检测结果进行计算处理,并控制感应加热电源动态调整冒口处液态钛合金的温度,本发明通过冒口处液态钛合金成分信息动态调整冒口加热温度,技术先进,能够提升大型钛合金机匣铸件的整体冶金质量,减轻铸件中不同位置处的成分偏析。(The invention discloses a riser dynamic heating system and a riser dynamic heating method in a titanium alloy casing casting process, wherein the riser dynamic heating system comprises a graphite sleeve, a heating coil, a heat insulation sleeve and a stainless steel protective sleeve which are sleeved outside a riser of molding sand in sequence; the device further comprises an LIBS clamping mechanism, an LIBS device, an infrared thermometer, a thermometer clamping mechanism, an industrial personal computer and an induction heating power supply. The invention monitors the chemical components of the liquid titanium alloy at the riser in real time through the LIBS device, calculates and processes the detection result of the chemical components through the industrial personal computer, and controls the induction heating power supply to dynamically adjust the temperature of the liquid titanium alloy at the riser.)

1. A dynamic riser heating system in the casting process of a titanium alloy casing is characterized by comprising:

the graphite sleeve (3) is sleeved outside a dead head of the molding sand (2), and the high-temperature liquid titanium alloy is cooled and solidified in an inner cavity of the molding sand (2) to form a titanium alloy casing casting (1);

the heating coil (4) is sleeved outside the graphite sleeve (3);

a heat insulation sleeve (5) sleeved outside the heating coil (4);

the stainless steel protective sleeve (6) is sleeved on the outer side of the heat insulation sleeve (5);

the LIBS device (8) is used for enabling a probe (8-7) of the LIBS device to be close to the liquid level position of the liquid titanium alloy in the riser, and the LIBS device (8) is used for measuring the chemical components of the high-temperature liquid titanium alloy in the riser in real time;

the infrared thermometer (9) is used for measuring the temperature of the liquid titanium alloy in the riser in real time;

an induction heating power supply (12) electrically connected to the heating coil (4) and configured to output an alternating current to the heating coil (4);

the industrial personal computer (11) is used for receiving the chemical components of the liquid titanium alloy in the feeder head measured by the LIBS device (8) in real time, and receiving the temperature of the liquid titanium alloy in the riser measured by the infrared thermometer (9) in real time, and the chemical composition of the titanium alloy measured by the LIBS device (8) is compared with the process database of the optimal riser temperature range corresponding to the chemical composition of the titanium alloy at the riser in real time to obtain the optimal temperature range which is actually reached at the riser, then controlling the induction heating power supply (12) to work in real time according to the temperature of the liquid titanium alloy in the riser measured by the current infrared thermometer (9) and the obtained optimal temperature range which is actually reached by the riser, thereby controlling the heating power of the heating coil (4) and controlling the temperature of the liquid titanium alloy in the riser in real time within the actually achieved optimal temperature range.

2. The dynamic riser heating system in the process of casting the titanium alloy casing as claimed in claim 1, wherein the LIBS device (8) is fixed on a LIBS clamping mechanism (7), and the LIBS clamping mechanism (7) is used for adjusting the position of the LIBS device (8) so as to enable a probe of the LIBS device (8) to be close to the liquid titanium alloy liquid level in the riser; and the measurement result of the chemical composition of the high-temperature liquid titanium alloy in the feeder head measured by the LIBS device (8) is transmitted to the industrial personal computer (11) through a signal wire.

3. The dynamic heating system for the riser in the casting process of the titanium alloy casing according to claim 1, wherein the infrared thermometer (9) is fixed on a thermometer clamping mechanism (10), and the thermometer clamping mechanism (10) is used for adjusting the position of the infrared thermometer (9) so that the infrared thermometer (9) can measure the temperature of the liquid titanium alloy in the riser.

4. The dynamic riser heating system for the titanium alloy casing casting process according to claim 1, wherein: the LIBS apparatus (8) comprises:

a probe (8-7), a pulse laser (8-1) and a long-pass filter (8-5);

a laser mirror (8-4) for reflecting the nanosecond pulse laser beam toward a long pass filter (8-5);

the focusing convex lens (8-6) is used for focusing the light wave transmitted by the long-pass filter (8-5) on the outlet end of the probe (8-7), and is also used for converging the emitted light of the plasma excited by the nanosecond pulse laser beam on the liquid titanium alloy in the riser, and the emitted light of the plasma is further reflected to the light receiving convex lens (8-8) by the long-pass filter (8-5) after being converged by the focusing convex lens (8-6);

the light collecting convex lens (8-8) is used for carrying out secondary collection on the plasma emission light reflected by the long-pass filter (8-5) and collected by the focusing convex lens (8-6), and focusing the plasma emission light on the light inlet end of the spectrometer (8-9);

the spectrometer (8-9) is used for carrying out chromatic dispersion on the light wave converged by the light-receiving convex lens (8-8) and focused on the light inlet end of the light-receiving convex lens and measuring the light intensity corresponding to each wavelength after chromatic dispersion;

the pulse laser (8-1), the laser reflector (8-4), the long-pass filter (8-5), the focusing convex lens (8-6), the light-collecting convex lens (8-8) and the spectrometer (8-9) are all arranged in the sealed shell (8-2); the side wall of the sealed shell (8-2) is also provided with an argon inlet (8-3); the probe (8-7) is also welded on the side wall of the sealed shell (8-2); compressed argon is introduced through the argon inlet (8-3), the inner diameter of the outlet end of the probe (8-7) is gradually reduced, the argon forms circulation in the sealed shell (8-2), flows in from the argon inlet (8-3) and flows out from the outlet end of the probe (8-7), and the argon is introduced into the sealed shell (8-2), so that the whole light path is in an inert gas argon atmosphere, and the outlet end of the probe (8-7) can be cooled.

5. The dynamic riser heating system in the titanium alloy casing casting process according to claim 4, wherein the pulse laser (8-1) is used for outputting nanosecond pulse laser beam with wavelength of 1064 nm.

6. The dynamic heating system of a riser in the casting process of a titanium alloy casing, according to claim 4, wherein said long pass filter (8-5) is used for transmitting light waves with the wavelength greater than or equal to 600nm and reflecting light waves with the wavelength less than 600 nm.

7. The dynamic riser heating system for the titanium alloy casing casting process according to claim 1, wherein: the pulse laser (8-1) is an Nd-YAG solid-state laser, and can output a pulse laser beam with the wavelength of 1064nm, the pulse width of 5ns and the repetition frequency of 10 Hz.

8. A dynamic heating method for a riser in a casting process of a titanium alloy casing is characterized by comprising the following steps:

the method comprises the following steps of measuring chemical components of liquid titanium alloy in a riser in the casting process of a titanium alloy casing in real time through an LIBS device (8);

measuring the temperature of the liquid titanium alloy in the riser in real time;

the chemical components of the liquid titanium alloy at the riser measured by the LIBS device (8) are compared with a process database of the optimal temperature range of the riser corresponding to the chemical components of the titanium alloy at the riser in real time to obtain the optimal temperature range which the riser actually should reach, and meanwhile, the heating power of the riser is adjusted in real time by combining the temperature of the liquid titanium alloy at the riser measured in real time, so that the temperature of the liquid titanium alloy in the riser is controlled within the optimal temperature range which the riser actually should reach in real time.

Technical Field

The invention belongs to the technical field of titanium alloy casting, and relates to a dynamic riser heating system and method in the casting process of a titanium alloy casing.

Background

The casting process is one of the main processes for producing the titanium alloy casing, and due to the characteristics of large part size, low titanium alloy heat conductivity and the like of the aircraft engine casing, component segregation caused by uneven cooling is easy to occur in the casting process of the titanium alloy casing, so that the yield of the parts is low, and the design and use requirements cannot be met. In order to improve the component uniformity of the titanium alloy casing casting, the temperature of a riser is controlled by adopting a riser heating or heat preservation method in the prior art, so that the problem of component segregation after the casing casting is cooled is reduced. The existing scheme is that a heating device or a heat insulation structure is additionally arranged at a dead head to heat or insulate heat by fixed parameters, but the chemical components of the titanium alloy are complex, and in the casting process, the liquid titanium alloy can undergo a very complex solidification process and the uniformity of metallurgical components after the part is solidified is difficult to ensure.

The riser heating device in the prior art adopts fixed parameters or preset parameters to heat risers, but for large-size complex structural parts such as titanium alloy casings, the risers are numerous and distributed at various positions on the parts, the preset parameters cannot ensure that the temperature at each riser meets the temperature required by uniform cooling of the parts, meanwhile, the attributes of raw materials adopted in each casting are different, and the preset heating parameters cannot consider the difference of the raw materials.

Disclosure of Invention

The purpose of the invention is: the invention provides a dynamic riser heating system and method in the casting process of a titanium alloy casing, which can obviously improve the metallurgical quality of casting of titanium alloy casing parts and reduce the chemical composition segregation of castings.

In order to solve the technical problem, the technical scheme of the invention is as follows:

a dynamic riser heating system in a titanium alloy casing casting process comprises:

the graphite sleeve is sleeved outside a riser of the molding sand, and the high-temperature liquid titanium alloy is cooled and solidified in an inner cavity of the molding sand to form a titanium alloy casing casting;

the heating coil is sleeved outside the graphite sleeve;

the heat insulation sleeve is sleeved outside the heating coil;

the stainless steel protective sleeve is sleeved on the outer side of the heat insulation sleeve;

the LIBS device is used for measuring chemical components of the high-temperature liquid titanium alloy in the riser in real time, and a probe of the LIBS device is close to the liquid level of the liquid titanium alloy in the riser;

the infrared thermometer is used for measuring the temperature of the liquid titanium alloy in the riser in real time;

the induction heating power supply is electrically connected with the heating coil and used for outputting alternating current to the heating coil;

and the industrial personal computer is used for receiving the chemical components of the liquid titanium alloy in the riser measured by the LIBS device in real time, receiving the temperature of the liquid titanium alloy in the riser measured by the infrared thermometer in real time, comparing the chemical components of the titanium alloy measured by the LIBS device with a process database of the optimal temperature range of the riser corresponding to different chemical components of the titanium alloy at the riser stored in the industrial personal computer in real time to obtain the optimal temperature range which the riser actually needs to reach, and then controlling the induction heating power supply to work in real time according to the temperature of the liquid titanium alloy in the riser measured by the current infrared thermometer and the obtained optimal temperature range which the riser actually needs to reach, so that the heating power of the heating coil is controlled, and the temperature of the liquid titanium alloy in the riser is controlled in the optimal temperature range which the riser actually needs to reach in real time.

The LIBS device is fixed on the LIBS clamping mechanism, and the LIBS clamping mechanism is used for adjusting the position of the LIBS device so that a probe of the LIBS device is close to the liquid level of the liquid titanium alloy in the riser; and the measurement result of the chemical composition of the high-temperature liquid titanium alloy in the riser measured by the LIBS device is transmitted to the industrial personal computer through a signal wire.

The infrared thermometer is fixed on the thermometer clamping mechanism, and the thermometer clamping mechanism is used for adjusting the position of the infrared thermometer, so that the infrared thermometer can measure the temperature of the liquid titanium alloy in the riser.

The LIBS apparatus described above includes:

a probe;

the pulse laser is used for outputting nanosecond pulse laser beams with the wavelength of 1064 nm;

the long-pass filter is used for transmitting light waves with the wavelength being more than or equal to 600nm and reflecting light waves with the wavelength being less than 600 nm;

the laser reflector is used for reflecting the nanosecond pulse laser beam to the long-pass filter plate;

the focusing convex lens is used for focusing the light wave transmitted by the long-pass filter on the outlet end of the probe, and is also used for converging the emitted light of the plasma excited by the nanosecond pulse laser beam on the liquid titanium alloy in the riser, and the emitted light of the plasma is further reflected to the light receiving convex lens by the long-pass filter after being converged by the focusing convex lens;

the light collecting convex lens is used for carrying out secondary convergence on the plasma emission light reflected by the long-pass filter and converged by the focusing convex lens, and focusing the plasma emission light on the light inlet end of the spectrometer;

the spectrometer is used for carrying out dispersion on the light wave converged by the light-receiving convex lens and focused on the light inlet end of the light-receiving convex lens and measuring the light intensity corresponding to each wavelength after dispersion;

the pulse laser, the laser reflector, the long-pass filter, the focusing convex lens, the light-receiving convex lens and the spectrometer are all arranged in the sealed shell; the side wall of the sealed shell is also provided with an argon inlet; the probe is also welded on the side wall of the sealed shell; through the argon gas entry lets in compressed argon gas, the internal diameter of the exit end of probe reduces gradually, and argon gas forms the circulation in sealed enclosure, flows in from the argon gas entry, flows out from the exit end of probe, lets in argon gas in the sealed enclosure and makes whole light path be in inert gas argon atmosphere on the one hand, and on the other hand can make the exit end of probe 8-7 obtain cooling.

The pulse laser is Nd-YAG solid-state laser, and can output pulse laser beam with 1064nm wavelength, 5ns pulse width and 10Hz repetition rate.

A dynamic heating method for a riser in a casting process of a titanium alloy casing comprises the following steps:

measuring chemical components of liquid titanium alloy in a riser in the casting process of the titanium alloy casing in real time through an LIBS device;

measuring the temperature of the liquid titanium alloy in the riser in real time;

the method comprises the steps of comparing chemical components of liquid titanium alloy at a riser measured by a LIBS device with a process database of the optimal temperature range of the riser corresponding to the chemical components of the titanium alloy at the riser in real time to obtain the optimal temperature range which the riser actually should reach, and adjusting the heating power of the riser in real time by combining the temperature of the liquid titanium alloy at the riser measured in real time, so that the temperature of the liquid titanium alloy in the riser is controlled within the optimal temperature range which the riser actually should reach in real time.

The invention has the beneficial effects that: compared with the traditional riser heating technology, the method has the advantages that the chemical components of the liquid titanium alloy at the riser are monitored in real time through the LIBS device, the real-time chemical component information obtained through monitoring by the LIBS device is compared with the optimal riser temperature process database through the industrial personal computer, the optimal riser temperature range corresponding to the real-time chemical components of the liquid titanium alloy at the riser is obtained, and then the temperature of the riser is dynamically adjusted in real time through the heating coil and the infrared thermometer, so that the temperature of the riser is controlled within the optimal riser temperature range corresponding to the real-time chemical components of the liquid titanium alloy at the riser. The riser temperature control method has the advantages that the riser temperature control in the casting process is realized through the online component monitoring of the LIBS technology, the industrial personal computer compares the optimal riser temperature process database and the closed-loop temperature regulation of the heating system, the technology is advanced, and compared with the traditional fixed-parameter riser heating method, the riser temperature control method can realize the fine control of the riser temperature in the casting process of the titanium alloy casing, so that the solidification process of a casting is optimized, the component segregation at different positions in the casting is reduced, and the integral metallurgical quality of the large titanium alloy casing casting is obviously improved.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the embodiment of the present invention will be briefly explained. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be obtained from these drawings without inventive effort.

FIG. 1 is a schematic view of the present invention in the configuration of a riser;

FIG. 2 is a schematic structural view of a titanium alloy casing casting;

FIG. 3 is a schematic diagram of the internal structure of the LIBS apparatus of the present invention;

FIG. 4 is a schematic diagram of the system connection of an industrial personal computer according to the present invention;

FIG. 5 is a schematic diagram of an industrial personal computer comparing a riser optimal temperature process database.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Features of various aspects of embodiments of the invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without these specific details. The following description of the embodiments is merely intended to better understand the present invention by illustrating examples thereof. The present invention is not limited to any particular arrangement or method provided below, but rather covers all product structures, any modifications, alterations, etc. of the method covered without departing from the spirit of the invention.

In the drawings and the following description, well-known structures and techniques are not shown to avoid unnecessarily obscuring the present invention. An embodiment of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the embodiment.

Laser-Induced Breakdown Spectroscopy (LIBS) is an emission spectrum analysis method developed in recent years, which ablates sample materials near a focus in a short time by focusing a pulse Laser beam on the sample, so that the materials are rapidly heated and gasified, and further plasma is generated; in the evolution process of the plasma, photons with different wavelengths can be radiated outwards, each element can find the characteristic wavelength corresponding to the element, the analysis of each element component in the sample can be realized by collecting and analyzing the emission spectrum of the plasma, and the whole LIBS analysis process usually only takes several seconds. The LIBS has the characteristics of non-contact, multi-element simultaneous detection, all-optical excitation, high analysis speed, no need of sample preparation, small laser ablation amount and the like, and shows great advantages in-situ/online measurement occasions. With the development and maturity of LIBS technology, it has been successfully applied in the fields of aerospace exploration, environmental protection, geological analysis, metallurgical analysis, coal quality detection, etc.

In order to overcome the defects in the prior art disclosed by the background of the invention, the invention adopts an LIBS device to monitor the components of the liquid titanium alloy at the riser in real time, calculates the real-time optimal temperature of the position of the riser according to the component monitoring information in real time, and finally dynamically heats the riser through a closed-loop system to enable the temperature of the riser to be as close to the optimal temperature as possible. Compared with the prior art, the heating power at the riser is dynamically adjusted according to the real-time monitoring result of the LIBS device on the components of the liquid titanium alloy at the riser, so that the heating power can be pertinently provided according to the actual real-time component segregation condition of each riser in the casting process, and the component uniformity of the final casting is ensured.

Specifically, referring to fig. 1, the invention discloses a dynamic riser heating system and a dynamic riser heating method in a titanium alloy casing casting process, wherein the system comprises a graphite sleeve 3, a heating coil 4, a heat insulation sleeve 5, a stainless steel protective sleeve 6, a LIBS clamping mechanism 7, a LIBS device 8, an infrared thermometer 9, a thermometer clamping mechanism 10, an industrial personal computer 11, an induction heating power supply 12 and the like, wherein high-temperature liquid titanium alloy is cooled and solidified in an inner cavity of molding sand 2 to form a titanium alloy casing casting 1; the graphite sleeve 3 is sleeved on a riser structure of the molding sand 2, the heating coil 4 is sleeved on the outer side of the graphite sleeve 3, the heat insulation sleeve 5 is sleeved on the outer side of the heating coil 4, and the stainless steel protective sleeve 6 is sleeved on the outer side of the heat insulation sleeve 5; the LIBS device 8 is fixed on the LIBS clamping mechanism 7, and a probe of the LIBS device 8 can be close to the liquid level position of the liquid titanium alloy in the riser by adjusting the LIBS clamping mechanism 7; the infrared thermometer 9 is fixed on the thermometer clamping mechanism 10, and the infrared thermometer 9 can measure the temperature of the liquid titanium alloy in the riser by adjusting the thermometer clamping mechanism 10; the LIBS device 8 transmits the measurement result to the industrial personal computer 11 through a signal line, the industrial personal computer 11 controls the induction heating power supply 12 to work through the signal line, so that the alternating current output to the heating coil 4 by the induction heating power supply 12 changes, the temperature is measured through the infrared thermometer 9, and the temperature of the liquid titanium alloy is controlled to be the target temperature set by the industrial personal computer 11.

Referring to fig. 2, the titanium alloy casing casting 1 is a large-sized complex part with a plurality of riser structures, and the risers are distributed at different positions of the titanium alloy casing casting 1.

Referring to fig. 3, the LIBS device 8 comprises a pulse laser 8-1, a sealed housing 8-2, an argon inlet 8-3, a laser reflector 8-4, a long pass filter 8-5, a focusing convex lens 8-6, a probe 8-7, a light collecting convex lens 8-8 and a spectrometer 8-9. Wherein, a pulse laser 8-1, a laser reflector 8-4, a long pass filter 8-5, a focusing convex lens 8-6, a light collecting convex lens 8-8 and a spectrometer 8-9 are arranged in a sealed shell 8-2; an argon inlet 8-3 is welded on the side surface of the sealed shell 8-2; the probe 8-7 is welded on the side surface of the sealed shell 8-2. The LIBS device 8 works as follows: a pulse laser 8-1 outputs a nanosecond pulse laser beam with the wavelength of 1064nm, the nanosecond pulse laser beam is reflected by a laser reflector 8-4, passes through a long-pass filter 8-5 and is focused at the outlet end of a probe 8-7 through a focusing convex lens 8-6, the focused nanosecond pulse laser beam excites plasma on a liquid titanium alloy casing casting 1, the emitted light of the plasma is focused at the inlet end of a spectrometer 8-9 after being converged for one time through the focusing convex lens 8-6, reflected by the long-pass filter 8-5 and converged for two times through the light-receiving convex lens 8-8; the probe 8-7 is of a cylindrical structure, the outlet end of the probe 8-7 is made into a state that the inner diameter is gradually reduced (see the lower end of the probe in fig. 3 in detail), before the LIBS device 8 starts to measure, compressed argon is introduced from an argon inlet 8-3, the argon forms circulation in an inner cavity (in a sealing shell 8-2) of the LIBS device 8, flows in from the argon inlet 8-3 and flows out from the outlet end of the probe 8-7, and the argon is introduced into the sealing shell, so that the whole optical path is in an inert gas argon atmosphere, and the outlet end of the probe 8-7 is cooled.

YAG solid-state laser 8-1 is Nd, and can output pulse laser beam with wavelength 1064nm, pulse width 5ns, and repetition frequency 10 Hz; the working surface of the long-pass filter 8-5 can transmit light waves with the wavelength more than or equal to 600nm and reflect light waves with the wavelength less than 600 nm; the spectrometer 8-9 can disperse light waves with wavelengths ranging from 180 nm to 600nm and detect light intensity corresponding to each wavelength.

Referring to fig. 4, in particular, the industrial personal computer 11 receives in real time the chemical composition of the liquid titanium alloy in the riser measured by the LIBS device 8, and receiving the temperature of the liquid titanium alloy in the riser measured by the infrared thermometer 9 in real time, and obtaining the optimal temperature range which is actually reached at the riser by comparing the chemical components of the titanium alloy measured by the LIBS device 8 with a process database of the optimal temperature range of the riser corresponding to different chemical components of the titanium alloy at the riser stored in the industrial personal computer 11 in real time, then controlling the induction heating power supply 12 to work in real time according to the temperature of the liquid titanium alloy in the riser measured by the current infrared thermometer 9 and the obtained optimal temperature range which is actually reached by the riser, thereby controlling the heating power of the heating coil 4, and controlling the temperature of the liquid titanium alloy in the riser in real time within the actually achieved optimal temperature range.

Referring to fig. 5, the process of comparing the optimal temperature process database of the riser by the industrial personal computer 11 is as follows: the industrial personal computer 11 receives the real-time chemical components measured by the LIBS device 8 as input, compares the real-time chemical components with chemical component data in the riser optimal temperature process database, and determines a real-time optimal temperature range as output; the industrial personal computer 11 further determines that the induction heating power supply control signal is output to the induction heating power supply 12 by comparing the real-time riser temperature measured by the infrared thermometer 9 with the real-time optimal temperature range.

The method comprises the following steps: measuring chemical components of liquid titanium alloy in a riser in the casting process of the titanium alloy casing in real time through an LIBS device 8; simultaneously measuring the temperature of the liquid titanium alloy in the riser in real time; and then, the chemical composition of the liquid titanium alloy at the riser measured by the LIBS device 8 is compared with a process database of the optimal temperature range of the riser corresponding to the chemical composition of the titanium alloy at the riser in real time to obtain the optimal temperature range which the riser actually should reach, and meanwhile, the heating power of the riser is adjusted in real time by combining the temperature of the liquid titanium alloy at the riser measured in real time, so that the temperature of the liquid titanium alloy in the riser is controlled within the optimal temperature range which the riser actually should reach in real time.

In summary, compared with the traditional riser heating technology, the method has the advantages that chemical components of the liquid titanium alloy at the riser are monitored in real time through the LIBS device, real-time chemical component information obtained through monitoring of the LIBS device is compared with the optimal riser temperature process database through the industrial personal computer, the optimal riser temperature range corresponding to the real-time chemical components of the liquid titanium alloy at the riser is obtained, and then the temperature of the riser is dynamically adjusted in real time through the heating coil and the infrared thermometer, so that the temperature of the riser is controlled to be within the optimal riser temperature range corresponding to the real-time chemical components of the liquid titanium alloy at the riser. The riser temperature control method has the advantages that the riser temperature control in the casting process is realized through the online component monitoring of the LIBS technology, the industrial personal computer compares the optimal riser temperature process database and the closed-loop temperature regulation of the heating system, the technology is advanced, and compared with the traditional fixed-parameter riser heating method, the riser temperature control method can realize the fine control of the riser temperature in the casting process of the titanium alloy casing, so that the solidification process of a casting is optimized, the component segregation at different positions in the casting is reduced, and the integral metallurgical quality of the large titanium alloy casing casting is obviously improved.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention.