Temperature control system of ring rolling production line

Abstract

The invention relates to the technical field of forging presses, in particular to a temperature control system of a ring rolling production line, which comprises a gas main pipeline corresponding to a main roller, a core roller and two conical rollers, and the gas main pipeline is provided with a gas inlet; the multiple fuel gas auxiliary pipe sets correspond to the main roller, the core roller and the conical roller respectively, a connecting opening is formed in one end of each fuel gas auxiliary pipe set, a fuel gas outlet is formed in the other end of each fuel gas auxiliary pipe set, the connecting openings communicate with a fuel gas main pipeline, and the fuel gas outlets are provided with combustion heads; the plurality of temperature sensors respectively correspond to the main roller, the core roller and the conical roller; and the control system is connected to the ring rolling production line, the fuel gas auxiliary pipe set, the combustion head and the temperature sensor, and the control system is used for controlling the fuel gas supply amount. According to the method, the effect of real-time temperature compensation on the roller is achieved, and the forming quality of the ring piece is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of forging press, in particular to a temperature control system of ring rolling production line. BACKGROUND

[0002] Large high-temperature alloy ring is widely used in key components of aero-engine, rocket engine, nuclear reactor and other high-temperature complex stress state. The radial-axial rolling forming of ring is the most important forming method for producing this kind of ring. The hot working temperature range of high-temperature alloy is narrow, and the initial forging temperature and the final forging temperature are generally 1250℃-1050℃. The size of the ring gradually increases during the rolling process, and the related ring temperature control measures cannot be designed, especially when the ring temperature is lower than the final forging temperature, which will lead to increased deformation resistance, increased equipment load and increased organizational defects after rolling. Therefore, it is crucial to design a related temperature control system for the ring rolling process.

[0003] In the rolling process, the main factors leading to the temperature drop of the ring are as follows: heat conduction between the ring and the air; contact heat conduction between the ring and the main roller, core roller and cone roller; heat transfer between the ring and the roller is the main factor of temperature drop.

[0004] The current development status of ring temperature control in rolling process: the existing rolling process only heats the ring itself. Due to the large size of the ring, only local heating of the ring can be achieved, which leads to uneven temperature distribution and easy formation of large temperature stress in the ring during the start of the rolling process, thereby leading to the initiation and expansion of local cracks in the ring during the rolling process. The existing heating device cannot achieve full-process heating as the size of the ring increases. The existing heating process cannot consider the temperature loss during the rolling process of the ring, and there is no related automatic control system to compensate for the heat loss. SUMMARY

[0005] The present application aims to solve at least one of the technical problems in the related art. To this end, the present application provides a temperature control system of ring rolling production line, which solves the technical problem that the roller temperature compensation cannot be achieved in the ring rolling process of the prior art, realizes the effect of real-time temperature compensation of the roller, and improves the forming quality of the ring.

[0006] The present application provides a temperature control system of ring rolling production line, which includes a main roller, a core roller and two cone rollers, and the temperature control system comprises: A gas main pipeline is provided with a gas inlet; A plurality of groups of gas auxiliary pipes, each group of gas auxiliary pipes corresponding to the main roller, the core roller and the cone roller, one end of the gas auxiliary pipe group forming a connecting port and the other end forming a gas outlet, the connecting port being communicated with the gas main pipeline, and the gas outlet being provided with a combustion head; a plurality of temperature sensors, each of the plurality of temperature sensors corresponding to the main roller, the core roller and the cone roller; a control system connected to the ring rolling production line, the gas main pipe, the gas sub-pipe group, the combustion head and the temperature sensors; the control system sets an initial processing temperature of the ring and a processing temperature threshold of the ring, and then controls the combustion head to ignite the gas to heat the main roller, the core roller and the cone roller, the temperature sensors acquire real-time temperatures of the main roller, the core roller and the cone roller, and when the control system identifies that the real-time temperatures are equal to the initial processing temperature of the ring, the control system controls to close the gas main pipe and the gas sub-pipe group, and then controls to start the ring rolling production line; In the process of processing the ring, the control system identifies the real-time temperatures of the main roller, the core roller and the cone roller, and when the real-time temperatures are less than the upper limit of the processing temperature threshold, the control system controls to perform a temperature compensation operation; The control system obtains a temperature-time curve, and then obtains an average heat flux density according to the temperature-time curve and Fourier's law, and then calculates the heat loss of the main roller, the core roller and the cone roller in the process of processing the ring and the gas volume that needs to be compensated according to the average heat flux density, and then controls the gas sub-pipe group to supply the calculated gas volume that needs to be compensated to complete the temperature compensation operation of the main roller, the core roller and the cone roller.

[0007] The further improvement of the temperature control system of the ring rolling production line is that the temperature compensation operation further includes the following steps: The control system acquires initial parameters of the ring blank, sets the rotation speed of the main roller, the rotation speed of the core roller and the rotation speed of the cone roller, and then calculates the total time of ring rolling, and the control system generates a set of time discrete points according to the total time of ring rolling , wherein the total time of ring rolling, and the difference between two adjacent time discrete points is a time step The control system generates a set of temperature discrete points according to the initial processing temperature of the ring and the real-time temperature of the main roller , wherein is the initial processing temperature of the ring, is the lower limit of the processing temperature threshold, and the temperature change value corresponding to each time step is obtained ; The control system generates a temperature-time curve according to the set of time discrete points and the set of temperature discrete points, and then obtains the heat flux density generated by the temperature change value corresponding to each time step according to the temperature-time curve and Fourier's law , , wherein, Indicates thermal conductivity. Indicates specific heat capacity. Indicates the density of the ring component; The average heat flux density for all time steps was then calculated. for: The control system calculates the heat loss of the main roller, core roller, and tapered roller during the ring machining process: The control system calculates the gas volume that the temperature control system needs to compensate for: in, Indicates the heat loss of the main roller. Indicates the main roller speed. Indicates the total time spent rolling the ring parts. Indicates the radius of the main roller. Indicates the height of the main roller. Indicates the heat loss of the tapered roller. Indicates the speed of the cone roller. This indicates the radius of the upper bottom surface of the cone roller. This indicates the radius of the bottom surface of the cone roller. Indicates the height of the tapered roller. Indicates the heat loss of the core roller. Indicates the speed of the cone roller. Indicates the height of the core roller. Indicates the radius of the main roller. Indicates the calorific value of the gas. This indicates the volume of gas that needs to be compensated for in the gas auxiliary pipeline corresponding to the main roller. This indicates the amount of gas that needs to be compensated for in the gas auxiliary pipeline corresponding to the mandrel. This indicates the volume of gas that needs to be compensated for in the gas auxiliary pipeline corresponding to the cone roller. Indicates the total compensated gas volume; Will The gas is introduced into the main gas pipeline, and then... The gas is introduced into the corresponding main roller's auxiliary gas pipe, and the gas is... The gas is introduced into the gas auxiliary pipe of the corresponding core roller, and the gas is... The gas is introduced into the gas auxiliary pipe corresponding to the cone roll, and the burner head ignites the gas to compensate for the temperature of the main roll, core roll, and cone roll. , , After the gas has finished burning, shut off all gas auxiliary pipe groups.

[0008] The further improvement of the temperature control system of the ring piece rolling production line is that the total control valve is arranged at the gas inlet of the gas main pipeline. The gas auxiliary pipeline group comprises a pipeline and a first electric ball valve, a gas concentration detector, a filter, a pressure reducing valve, a first pressure gauge, a first pressure switch, a cut-off valve, a second electric ball valve, a distribution electromagnetic valve, a wind control module, a total electromagnetic valve and a mixing module arranged in sequence on the pipeline.

[0009] The further improvement of the temperature control system of the ring piece rolling production line is that the wind control module comprises a branch pipeline communicated with one end of the pipeline and a fan, a second pressure gauge, a second pressure switch, a flow regulating valve and a third electric ball valve arranged in sequence on the branch pipeline, and the third electric ball valve is located at the end of the branch pipeline close to the pipeline.

[0010] The further improvement of the temperature control system of the ring piece rolling production line is that the mixing module is a mixing cavity used for mixing gas and air.

[0011] The further improvement of the temperature control system of the ring piece rolling production line is that the control system comprises an ignition controller connected to the combustion head, and the ignition controller is used to ignite the gas.

[0012] The further improvement of the temperature control system of the ring piece rolling production line is that two groups of the gas auxiliary pipeline groups are arranged on the side of the main roller, two groups of the gas auxiliary pipeline groups are arranged on the side of the core roller, and two groups of the gas auxiliary pipeline groups are arranged between the two taper rollers.

[0013] The further improvement of the temperature control system of the ring piece rolling production line is that the bottom of the bracket is provided with casters, the gas auxiliary pipeline group is placed in the bracket, and the pipeline is a flexible pipe.

[0014] The further improvement of the temperature control system of the ring piece rolling production line is that the safety detection module is further arranged, the safety detection module is used to detect the gas concentration outside the gas auxiliary pipeline group, and when the gas concentration is greater than or equal to a set value, the safety detection module sends an alarm signal and cuts off the gas supply of the gas auxiliary pipeline group.

[0015] The above one or more technical solutions in the embodiment of the application have at least one of the following technical effects: The application controls the heat conduction of the heat absorption and dissipation of each main roller of the rolling process by setting a temperature control system on the ring rolling production line, so as to avoid the cooling of the core while the outer part of the roller is heated. The heat dissipation of the rolling process is calculated based on the heat conduction control equation combined with the measured boundary conditions of the temperature sensor, and the heat dissipation is compensated. Compared with the compensation caused by the traditional surface temperature measurement, the heat compensation value is more accurate for temperature control. The application realizes the online preheating and dynamic temperature control of the main roller, the core roller and the cone roller. Compared with the traditional offline heating mode, the online scheme directly saves 15-25 minutes of preheating material hoisting time without repeated hoisting of preheating materials, reduces the occupation of the heating furnace space by the preheating materials, avoids the waste of the furnace space, and finally improves the equipment yield by 5%.

[0016] The heating control of the application adopts a heat loss feedforward control strategy associated with the rotating speeds of the main roller, the upper cone roller and the lower cone roller, realizes accurate temperature control by dynamically adjusting the opening degree of the heating gas valve and cooperatively regulating the temperature rise rate and the target temperature. The traditional preheating material method cannot realize online temperature compensation due to the lack of online regulation mechanism, and the temperature fluctuation range is more than 25 DEG C affected by the environment. The online heating control of the application effectively overcomes the above environmental interference, and stably controls the temperature fluctuation of the main roller, the upper cone roller and the lower cone roller within 10 DEG C, which fully meets the strict requirements of high-temperature ring rolling on temperature stability.

[0017] Additional aspects and advantages of the application will be described in part in the following description, some of which will become apparent from the following description, or will be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0019] Figure 1 is a schematic view of a temperature control system of a ring rolling production line provided by the application.

[0020] Figure 2 is a schematic view of a gas sub-pipe group in a temperature control system of a ring rolling production line provided by the application.

[0021] Figure 3 is a schematic view of a combustion head and a cone roller in a temperature control system of a ring rolling production line provided by the application.

[0022] Figure 4 is a temperature control principle diagram of a temperature control system of a ring rolling production line provided by the application.

[0023] Reference signs: 1, gas main pipe; 11, gas inlet; 12, total control valve; 13, pipeline; 14, branch pipe; 21, first electric ball valve; 22, gas concentration detector; 23, filter; 24, pressure reducing valve; 25, first pressure gauge; 26, first pressure switch; 27, cut-off valve; 28, second electric ball valve; 29, separate electromagnetic valve; 31, fan; 32, second pressure gauge; 33, second pressure switch; 34, flow regulating valve; 35, third electric ball valve; 36, total electromagnetic valve; 37, mixing module; 38, combustion head; 5, main roller; 51, main roller temperature sensor; 52, main roller rotating speed sensor; 6, core roller; 61, core roller temperature sensor; 7, taper roller; 71, taper roller rotating speed sensor; 72, taper roller temperature sensor; 4, bracket; 8, control system. DETAILED DESCRIPTION

[0024] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be clearly and completely described below with reference to the drawings in the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art without creative work fall into the protection scope of the present application. The following embodiments are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0025] The present application is described below with reference to the drawings. Figures 1 to 3 A temperature control system of a ring rolling production line is described, the ring rolling production line comprising a main roller 5, a core roller 6 and two taper rollers 7, the main roller 5 and the core roller 6 being used to adjust the inner diameter size and the outer diameter size of a ring, the two taper rollers 7 being used to adjust the thickness of the ring, the temperature control system 8 comprising: a gas main pipe 1, the gas main pipe 1 corresponding to the main roller 5, the core roller 6 and the two taper rollers 7, the gas main pipe 1 being provided with a gas inlet 11; a plurality of groups of gas sub-pipes, the plurality of groups of gas sub-pipes respectively corresponding to the main roller 5, the core roller 6 and the taper rollers 7, one end of the gas sub-pipes forming a connecting port and the other end forming a gas outlet, the connecting port being communicated with the gas main pipe 1, the gas outlet being provided with a combustion head 38; a plurality of temperature sensors, the plurality of temperature sensors respectively corresponding to the main roller 5, the core roller 6 and the taper rollers 7; a control system 8, the control system 8 being connected to the ring rolling production line, the gas main pipe 1, the gas sub-pipes, the combustion head 38 and the temperature sensors, the control system 8 being used to control the gas supply amount; The control system sets an initial machining temperature of the ring and a ring machining temperature threshold value, and then the control system opens the gas main pipeline and the gas sub-pipeline group, the gas enters the gas sub-pipeline group through the gas main pipeline, and then the gas is ignited by the combustion head to heat the main roller, the core roller and the taper roller. The temperature sensor obtains the real-time temperature of the main roller, the core roller and the taper roller. When the control system identifies that the real-time temperature of the main roller, the core roller and the taper roller is equal to the initial machining temperature of the ring, the control system controls to close the gas main pipeline and the gas sub-pipeline group, and then the control system controls to start the ring rolling production line to machine the ring. In the ring machining process, the control system identifies the real-time temperature of the main roller, the core roller and the taper roller. When the real-time temperature of the main roller, the core roller or the taper roller is less than the upper limit of the machining temperature threshold value, the control system opens the gas main pipeline and the corresponding gas sub-pipeline group to perform a temperature compensation operation. The temperature compensation operation includes the following steps: the control system obtains the total ring rolling time, and then generates a set of time discrete points according to the total ring rolling time. The control system generates a set of temperature discrete points according to the initial machining temperature of the ring and the real-time temperature of the main roller. Then, a temperature-time curve is generated according to the set of time discrete points and the set of temperature discrete points. Then, the average heat flux is obtained according to the temperature-time curve and the Fourier law. Then, the control system calculates the heat loss of the main roller, the core roller and the taper roller in the ring machining process and the gas volume that needs to be compensated according to the average heat flux. Then, the control system controls the gas sub-pipeline group to supply the calculated gas volume that needs to be compensated, so as to complete the temperature compensation operation of the main roller, the core roller and the taper roller.

[0026] Preferably, by precisely controlling the temperature of the main roller 5, the core roller 6 and the taper roller 7, it is ensured that the temperature of each part of the ring during the rolling process is always within the required temperature range, greatly improving the inner diameter, outer diameter and thickness size accuracy of the ring, optimizing the mechanical properties of the ring, and effectively reducing the scrap rate. The temperature control system 8 performs temperature compensation operation on the main roller 5, the core roller 6 and the taper roller 7, thereby reducing the downtime adjustment time caused by temperature fluctuations during ring machining, making the ring rolling process continuous and efficient, and significantly improving the overall operation efficiency of the production line. The gas is supplied according to the actual temperature demand of the main roller 5, the core roller 6 and the taper roller 7, realizing efficient use of energy and reducing the energy cost of production.

[0027] Preferably, the temperature control system 8 of the present application breaks through the limitation of traditional ring rolling "overall rough temperature control", adopts independent temperature control architecture of subassembly, each of the main roller 5, the core roller 6 and the taper roller 7 is provided with a gas sub-pipe group and a temperature sensor, so as to realize accurate temperature control of each key component, and the temperature control precision reaches the leading level in the industry. Deep integration of the ring rolling production line, the gas supply system and the temperature control system 8 of the present application can automatically adapt temperature parameters (such as rolling stages and ring specifications) according to production conditions, realize unmanned and intelligent temperature regulation and control, and represents the development direction of intelligent technology in the field of ring hot working.

[0028] In a preferred embodiment of the temperature control system of the ring rolling production line of the present application, as shown in Figures 1 to 3 The gas main pipeline 1 is provided with a total control valve 12 at the gas inlet 11. The gas sub-pipe group comprises a pipeline 13 and a first electric ball valve 21, a gas concentration detector 22, a filter 23, a pressure reducing valve 24, a first pressure gauge 25, a first pressure switch 26, a cut-off valve 27, a second electric ball valve 28, a separate electromagnetic valve 29, a wind control module, a total electromagnetic valve 36 and a mixing module 37 arranged in sequence in the pipeline 13.

[0029] Preferably, the pipeline 13 is made of special alloy material with high temperature resistance and corrosion resistance, so as to ensure long-term stable operation in a high-temperature gas environment. The first electric ball valve 21 and the second electric ball valve 28 realize the on-off and flow regulation of the gas. The gas concentration detector 22 monitors the gas concentration in the pipeline 13 in real time, ensures that the gas supply is within a safe range, and immediately triggers an alarm and connects the cut-off valve 27 for emergency cut-off if the concentration exceeds the standard. The filter 23 effectively filters impurities and particulate matters in the gas to prevent them from entering the subsequent equipment and causing blockage or damage. The pressure reducing valve 24 adjusts the high-pressure gas to a suitable working pressure, and the first pressure gauge 25 and the first pressure switch 26 display and monitor the pressure state in the pipeline 13 in real time, so as to ensure stable and reliable system pressure. The separate electromagnetic valve 29 and the total electromagnetic valve 36 work cooperatively to realize independent control and overall coordination of the gas supply, and the wind control module automatically adjusts the mixing ratio of the gas and air according to the environmental wind speed and temperature to achieve the best combustion effect. The mixing module 37 fully mixes the gas and air and then delivers them to the burner, so as to ensure sufficient, efficient and environmentally friendly combustion.

[0030] Specifically, the wind control module comprises a branch pipe 14 communicated with the pipeline 13 at one end and a fan 31, a second pressure gauge 32, a second pressure switch 33, a flow regulating valve 34 and a third electric ball valve 35 arranged in sequence in the branch pipe 14, and the third electric ball valve 35 is located at the end of the branch pipe 14 close to the pipeline 13.

[0031] Preferably, the fan 31 generates negative pressure by rotation, prompting the gas and air in the pipeline 13 to enter the branch pipe 14 in a certain proportion, improving the combustion efficiency of the gas. The second pressure gauge 32 and the second pressure switch 33 monitor the pressure state in the branch pipe 14 in real time, ensuring that the pressure fluctuates within a set range. Once the pressure is abnormal, the second pressure switch 33 will trigger an alarm and take corresponding measures immediately. The flow regulating valve 34 accurately adjusts the flow of gas and air entering the branch pipe 14 according to the combustion demand, ensuring the accuracy of the mixing ratio. The third electric ball valve 35 is responsible for controlling the on-off of the branch pipe 14. When it is necessary to adjust or maintain the wind control module, the fluid flow in the branch pipe 14 can be quickly cut off to ensure safety during operation.

[0032] Specifically, the mixing module 37 is a mixing chamber, which is used to moderate the gas and air.

[0033] Preferably, the mixing chamber is provided with special flow guide structures, which are distributed in a spiral shape and can guide the gas and air to form an orderly rotational flow in the chamber. Through this rotational flow movement, the gas and air can be fully mixed in a large contact area, greatly improving the uniformity of the mixture.

[0034] Specifically, the control system 8 includes an ignition controller connected to the combustion head 38, which is used to ignite the gas.

[0035] Preferably, the ignition controller is responsible for accurately controlling the ignition timing and ignition energy of the combustion head 38, ensuring that the combustion process is started under suitable conditions. It integrates advanced microprocessors and high-precision sensors, which can intelligently adjust the ignition strategy according to preset parameters and real-time feedback data such as the temperature and concentration of the mixed gas. When the indicators of the mixed gas reach the optimal ignition conditions, the ignition controller will quickly issue an ignition command to make the combustion head 38 ignite the mixed gas instantly, achieving stable and efficient combustion.

[0036] Further, the side of the main roller 5 is provided with two groups of the gas sub-pipe groups, the side of the core roller 6 is provided with two groups of the gas sub-pipe groups, and two groups of the gas sub-pipe groups are arranged between the two tapered rollers 7.

[0037] Preferably, the multi-region arrangement of the gas sub-pipe groups can greatly improve the uniformity of the heating of the main roller 5, the core roller 6 and the tapered roller 7, and ensure the performance stability of the subsequent processing of the ring. Multiple groups of gas sub-pipe groups can flexibly adjust the gas supply parameters of each region according to the processing needs of the ring, realize precise heat process control, adapt to various production process scenes, and enhance the process adaptation ability of the equipment.

[0038] Further, a bracket 4 is further included, a bottom of the bracket 4 is provided with a castor, the gas sub-pipe group is placed on the bracket 4, and the pipeline 13 is a hose.

[0039] Preferably, the position of the gas sub-pipe group can be flexibly adjusted according to actual production requirements through the bracket 4, and a large amount of manpower is not needed to carry. The hose is used as the pipeline 13, on the one hand, the hose can adapt to the position change of the gas sub-pipe group, and normal gas delivery is ensured; on the other hand, the hose has certain flexibility and tensile resistance, and is not easy to be damaged due to vibration or movement of equipment in the production process, and stable operation of the entire temperature control system 8 is ensured.

[0040] Further, a safety detection module is further included, the safety detection module is used to detect the gas concentration outside the gas sub-pipe group, when the gas concentration is greater than or equal to a set value, the safety detection module sends an alarm signal and cuts off the gas supply of the gas sub-pipe group.

[0041] Preferably, the safety detection module is arranged, the safety of the entire temperature control system 8 is effectively improved, potential dangerous conditions such as gas leakage can be found in time, explosion, fire and other serious accidents caused by too high gas concentration are avoided, and reliable safety protection is provided for the production process. At the same time, the alarm signal function can quickly remind the operator to take corresponding measures, and cutting off the gas supply can fundamentally prevent the gas from continuing to leak, further reduce the possibility of accidents, and protect the personal safety of production personnel and the normal operation of equipment.

[0042] Preferably, the temperature sensor includes a main roller temperature sensor 51, a core roller temperature sensor 61 and a taper roller temperature sensor 72, the main roller temperature sensor 51, the core roller temperature sensor 61 and the taper roller temperature sensor 72 are cooperated with each other, temperature data of each key roller body in the ring rolling process is comprehensively and accurately obtained, and accurate regulation and control are conducted on the entire temperature control system.

[0043] Preferably, a main roller rotation speed sensor 52 is further arranged at the main roller 5, and a taper roller rotation speed sensor 71 is further arranged at the taper roller 7.

[0044] Preferably, in the ring machining process, due to high-speed rotation of the main roller, the core roller and the taper roller, heat loss exists, and the temperature of the main roller, the core roller and the taper roller is continuously reduced, so that the temperature of the main roller, the core roller and the taper roller is easily reduced, and the machining quality of the ring is affected.

[0045] Further, as shown in Figure 4 When the control system identifies that the real-time temperature of the main roller is less than the machining temperature threshold value, the temperature compensation operation includes the following steps: The control system obtains initial parameters of the ring blank, sets the main roller speed, the core roller speed and the taper roller speed, and then calculates the total ring rolling time, and the control system generates a time discrete point set according to the total ring rolling time , wherein is equal to the total ring rolling time, and the difference between two adjacent time discrete points is a time step The control system generates a temperature discrete point set according to the initial processing temperature of the ring and the real-time temperature of the main roller , wherein is the initial processing temperature of the ring, is the lower limit of the processing temperature threshold, and the temperature change value corresponding to each time step is obtained ; The control system generates a temperature-time curve according to the time discrete point set and the temperature discrete point set, and then obtains the heat flux density generated by the temperature change value corresponding to each time step according to the temperature-time curve and the Fourier law , , wherein represents the thermal conductivity, represents the specific heat capacity, represents the density of the ring; and the average heat flux density of all time steps is calculated as The control system calculates the heat loss of the main roller, the core roller and the taper roller in the ring processing process: The control system calculates the gas volume that needs to be compensated by the temperature control system: wherein represents the heat loss of the main roller, represents the main roller speed, represents the total ring rolling time, represents the main roller radius, represents the main roller height, represents the heat loss of the taper roller, represents the taper roller speed, represents the radius of the upper base of the taper roller, represents the radius of the lower base of the taper roller, represents the height of the taper roller, represents the heat loss of the core roller, represents the taper roller speed, ​represents the height of the core roller, represents the radius of the main roller, represents the heat value of the fuel gas, represents the fuel gas volume that the fuel gas sub-pipeline corresponding to the main roller needs to compensate, represents the fuel gas volume that the fuel gas sub-pipeline corresponding to the core roller needs to compensate, represents the fuel gas volume that the fuel gas sub-pipeline corresponding to the taper roller needs to compensate, represents the total compensation fuel gas volume; the fuel gas of is introduced into the fuel gas main pipeline, and then the fuel gas of is introduced into the fuel gas sub-pipeline corresponding to the main roller, the fuel gas of is introduced into the fuel gas sub-pipeline corresponding to the core roller, and the fuel gas of is introduced into the fuel gas sub-pipeline corresponding to the taper roller, and the combustion head ignites the fuel gas to compensate the temperature of the main roller, the core roller and the taper roller, when , , the fuel gas is burned out, all the fuel gas sub-pipeline groups are closed.

[0046] Preferably, the values are the thermal conductivities of the rollers at different temperatures, as shown in Table 1.

[0047] Table 1 Preferably, during the execution of the temperature compensation operation, the control system continuously monitors the real-time temperatures of the main roller, the core roller and the taper roller, and dynamically compares them with the preset processing temperature threshold. Since the main roller is the main roller in the ring piece rolling process, the temperature change of the main roller is taken as the basis of the time-temperature curve, which can more accurately reflect the temperature dynamics of the entire ring piece rolling process. If the real-time temperature of any roller is still lower than the processing temperature threshold during the compensation process, the control system will recalculate the heat flux density in the remaining processing time and adjust the fuel gas compensation volume to ensure that the temperature of each roller is stably maintained within the threshold range in the subsequent processing. At the same time, the control system records the fuel gas consumption data of each temperature compensation, including the actual amount of the fuel gas sub-pipeline of the main roller, the core roller and the taper roller, and performs deviation analysis with the theoretical calculation value, and stores the deviation data to the system database for subsequent optimization of the temperature compensation algorithm. When the total time of the ring piece rolling ends, the control system automatically closes the fuel gas main pipeline and all the fuel gas sub-pipelines, and generates a temperature compensation report for this processing, which contains the temperature change curve of each roller, the fuel gas consumption statistics and the compensation effect evaluation, providing data support for subsequent production and improving the temperature control accuracy during ring piece processing.

[0048] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; and although the present application has been described in detail with reference to the foregoing embodiments, it should be appreciated by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features thereof can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A temperature control system for a ring rolling production line comprising a main roll, a core roll and two cone rolls, characterized in that, The temperature control system comprises: A gas main pipe provided with a gas inlet; A plurality of groups of gas sub-pipes corresponding to the main roller, the core roller and the cone roller, respectively, one end of each group of gas sub-pipes forming a connecting port and the other end forming a gas outlet, the connecting port being communicated with the gas main pipe, and the gas outlet being provided with a combustion head; A plurality of temperature sensors corresponding to the main roller, the core roller and the cone roller, respectively; A control system connected to the ring piece rolling production line, the gas main pipe, the gas sub-pipes, the combustion head and the temperature sensors; The control system is provided with a ring piece initial processing temperature and a ring piece processing temperature threshold, and then the control system controls the combustion head to ignite the gas to heat the main roller, the core roller and the cone roller, the temperature sensors acquire the real-time temperature of the main roller, the core roller and the cone roller, and when the control system identifies that the real-time temperature is equal to the ring piece initial processing temperature, the control system controls to close the gas main pipe and the gas sub-pipes, and then the control system controls to start the ring piece rolling production line; In the ring piece processing process, the control system identifies the real-time temperature of the main roller, the core roller and the cone roller, and when the real-time temperature is less than the upper limit of the processing temperature threshold, the control system controls to perform a temperature compensation operation; The control system obtains a temperature-time curve, and then obtains an average heat flux density according to the temperature-time curve and Fourier's law, and then calculates the heat loss of the main roller, the core roller and the cone roller in the ring piece processing process and the gas volume that needs to be compensated according to the average heat flux density, and then controls the gas sub-pipes to supply the calculated gas volume that needs to be compensated to complete the temperature compensation operation of the main roller, the core roller and the cone roller.

2. A temperature control system for a ring rolling production line according to claim 1, characterized in that, The temperature compensation operation further comprises the following steps: The control system acquires initial parameters of the ring blank, sets the main roller speed, the core roller speed and the taper roller speed, and then calculates the total ring rolling time, and generates a time discrete point set according to the total ring rolling time , wherein is equal to the total ring rolling time, and the difference between two adjacent time discrete points is a time step , the control system generates a temperature discrete point set according to the initial processing temperature of the ring and the real-time temperature of the main roller , wherein is the initial processing temperature of the ring, is the lower limit of the processing temperature threshold, and the temperature change value corresponding to each time step is acquired ; The control system generates a temperature-time curve according to the time discrete point set and the temperature discrete point set, and then obtains a heat flux density generated by a temperature change value corresponding to each time step according to the temperature-time curve and the Fourier law , , wherein, represents the thermal conductivity, represents the specific heat capacity, represents the ring density; The average heat flux density of all time steps is then calculated is: The control system calculates the heat loss of the main roller, the core roller and the cone roller in the ring piece processing process: The control system calculates the gas volume that needs to be compensated by the temperature control system: wherein, represents the heat loss of the main roller, represents the rotation speed of the main roller, represents the total time of the ring piece rolling, represents the radius of the main roller, represents the height of the main roller, represents the heat loss of the taper roller, represents the rotation speed of the taper roller, represents the radius of the upper base surface of the taper roller, represents the radius of the lower base surface of the taper roller, represents the height of the taper roller, represents the heat loss of the core roller, represents the rotation speed of the taper roller, represents the height of the core roller, represents the radius of the main roller, represents the heat value of the fuel gas, represents the fuel gas volume that needs to be compensated by the fuel gas sub-pipeline corresponding to the main roller, represents the fuel gas volume that needs to be compensated by the fuel gas sub-pipeline corresponding to the core roller, represents the fuel gas volume that needs to be compensated by the fuel gas sub-pipeline corresponding to the taper roller, represents the total compensation fuel gas volume; The gas of is introduced into the gas main pipeline, and then the gas of is introduced into the gas sub-pipeline corresponding to the main roller, the gas of is introduced into the gas sub-pipeline corresponding to the core roller, and the gas of is introduced into the gas sub-pipeline corresponding to the taper roller. The combustion head ignites the gas to compensate the temperature of the main roller, the core roller and the taper roller. When the gas of , , is burned out, all the gas sub-pipeline groups are closed.

3. The temperature control system for a ring rolling line according to claim 1, characterized in that, The gas main pipe is provided with a total control valve corresponding to the gas inlet; The gas sub-pipes comprise a pipeline and a first electric ball valve, a gas concentration detector, a filter, a pressure reducing valve, a first pressure gauge, a first pressure switch, a cut-off valve, a second electric ball valve, a distribution electromagnetic valve, a wind control module, a total electromagnetic valve and a mixing module arranged in the pipeline in sequence.

4. A temperature control system for a ring rolling line according to claim 3, characterized in that, The wind control module comprises a branch pipe communicated with the pipeline at one end and a fan, a second pressure gauge, a second pressure switch, a flow regulating valve and a third electric ball valve arranged in the branch pipe in sequence, and the third electric ball valve is located at the end of the branch pipe close to the pipeline.

5. A temperature control system for a ring rolling line as claimed in claim 4, characterized in that The mixing module is a mixing chamber for mixing gas and air.

6. The temperature control system for a ring rolling line of claim 1, wherein, The control system comprises an ignition controller connected to the combustion head, and the ignition controller is used to ignite the gas.

7. The temperature control system for a ring rolling line of claim 1, wherein, The side of the main roller is provided with two groups of gas sub-pipes, the side of the core roller is provided with two groups of gas sub-pipes, and two groups of gas sub-pipes are arranged between the two cone rollers.

8. The temperature control system for a ring rolling line according to claim 3, characterized in that, Further comprising a bracket, the bottom of the bracket is provided with casters, the gas sub-pipes are placed in the bracket, and the pipeline is a flexible pipe.

9. The temperature control system for a ring rolling line of claim 1, wherein, The safety detection module is used to detect the gas concentration outside the gas sub-pipe group, and when the gas concentration is greater than or equal to a set value, the safety detection module sends an alarm signal and cuts off the gas supply of the gas sub-pipe group.

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