A temperature control system for a ring rolling production line

Abstract

The present application relates to the technical field of forging press, especially to a temperature control system of ring rolling production line, comprising: a gas main pipe corresponding to a main roller, a core roller and two taper rollers, the gas main pipe is provided with a gas inlet; a plurality of groups of gas sub-pipes, the plurality of groups of gas sub-pipes correspond to the main roller, the core roller and the taper rollers respectively, one end of the gas sub-pipe group forms a connecting port and the other end forms a gas outlet, the connecting port is communicated with the gas main pipe, and the gas outlet is provided with a combustion head; a plurality of temperature sensors, the plurality of temperature sensors correspond to the main roller, the core roller and the taper rollers respectively; a control system, the control system is connected to the ring rolling production line, the gas sub-pipe group, the combustion head and the temperature sensor, and the control system is used to control the gas supply amount. The present application realizes the effect of real-time temperature compensation of the roller and improves the forming quality of the ring.

Description

TECHNICAL FIELD

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

[0002] Large high-temperature alloy rings are widely used in key components under high-temperature and complex stress states such as aircraft engines, rocket engines, nuclear reactors, etc. The radial-axial rolling forming of rings is the main forming method for producing such rings. The hot working temperature range of the high-temperature alloy is relatively 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 relevant ring temperature control measures cannot be designed, especially when the ring temperature is lower than the final forging temperature, which will lead to an increase in deformation resistance, an increase in equipment load, and an increase in organizational defects after rolling. Therefore, it is crucial to design a relevant temperature control system for the ring rolling process.

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

[0004] Current research 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, resulting in uneven temperature distribution, which can easily form large temperature stresses inside the ring at the beginning of the rolling process, leading to the initiation and propagation 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 ring rolling process, and there is no related automatic control system to compensate for the heat loss. SUMMARY

[0005] The present application aims to at least solve one of the technical problems in the related art. To this end, the present application provides a temperature control system of a ring rolling production line, which solves the technical problem that the roller temperature compensation cannot be achieved in the ring rolling process in the prior art, achieves 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 a ring rolling production line, which includes a main roller, a core roller, and two cone rollers, and the temperature control system comprises:

[0007] A gas main pipeline is provided with a gas inlet.

[0008] A plurality of groups of gas sub-pipes, each group of gas sub-pipes corresponding to a main roller, a core roller and a cone roller, one end of the group of gas sub-pipes forming a connection port and the other end forming a gas outlet, the connection port being in communication with the gas main pipe, and the gas outlet being provided with a combustion head;

[0009] A plurality of temperature sensors, each corresponding to a main roller, a core roller and a cone roller;

[0010] A control system connected to the ring rolling production line, the gas main pipe, the group of gas sub-pipes, the combustion head and the temperature sensors;

[0011] The control system sets the initial processing temperature of the ring and the 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, and 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 initial processing temperature of the ring, the control system controls to close the gas main pipe and the group of gas sub-pipes, and then the control system controls to start the ring rolling production line;

[0012] During the processing of the ring, 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;

[0013] 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 during the processing of the ring and the gas volume that needs to be compensated according to the average heat flux density, and then controls the group of 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.

[0014] 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:

[0015] The control system acquires the 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 the ring rolling, and the control system generates a set of time discrete points according to the total time of the ring rolling , wherein is equal to the total time of the 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 corresponding each time step is acquired Temperature change value ;

[0016] The control system generates a temperature-time curve based on the set of discrete time points and the set of discrete temperature points, and then obtains the heat flux density generated by the temperature change value corresponding to each time step based on the temperature-time curve and Fourier's law. , ,

[0017] in, Indicates thermal conductivity. Indicates specific heat capacity. Indicates the density of the ring component;

[0018] The average heat flux density for all time steps was then calculated. for:

[0019] The control system calculates the heat loss of the main roller, core roller, and tapered roller during the ring machining process:

[0020]

[0021]

[0022]

[0023] The control system calculates the gas volume that the temperature control system needs to compensate for:

[0024]

[0025] 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. a gas volume corresponding to the cone roller which needs to be compensated, a total compensated gas volume;

[0026] the gas is introduced into the gas main pipeline, and then the gas is introduced into the gas sub-pipeline corresponding to the main roller, the gas is introduced into the gas sub-pipeline corresponding to the main roller, the gas is introduced into the gas sub-pipeline corresponding to the core roller, the gas is introduced into the gas sub-pipeline corresponding to the cone roller, the gas is introduced into the gas sub-pipeline corresponding to the cone roller, the combustion head ignites the gas to compensate the temperature of the main roller, the core roller and the cone roller, when , , the gas is burned out, all the gas sub-pipeline groups are closed.

[0027] The further improvement of the temperature control system of the ring piece rolling production line is that a total control valve is arranged at the gas inlet corresponding to the gas main pipeline.

[0028] The gas sub-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 in the pipeline.

[0029] The further improvement of the temperature control system of the ring piece rolling production line is that the wind control module comprises a branch pipe 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 in the branch pipe, and the third electric ball valve is located at the end of the branch pipe close to the pipeline.

[0030] The further improvement of the temperature control system of the ring piece rolling production line is that the mixing module is a mixing cavity, and the mixing cavity is used to mix the gas and the air.

[0031] 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.

[0032] The further improvement of the temperature control system of the ring piece rolling production line is that two groups of the gas sub-pipeline groups are arranged at the side of the main roller, two groups of the gas sub-pipeline groups are arranged at the side of the core roller, and two groups of the gas sub-pipeline groups are arranged between the two cone rollers.

[0033] The further improvement of the temperature control system of the ring piece rolling production line is that a bracket is further included, the bottom of the bracket is provided with casters, the gas auxiliary pipe group is placed on the bracket, and the pipeline is a hose.

[0034] The further improvement of the temperature control system of the ring piece rolling production line is that a safety detection module is further included, the safety detection module is used for detecting the gas concentration outside the gas auxiliary 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 auxiliary pipe group.

[0035] The one or more technical solutions in the embodiment of the application at least have one of the following technical effects:

[0036] The temperature control system is arranged on the ring piece rolling production line, heat absorption and heat dissipation heat conduction of main rollers in the rolling process are controlled, so that the outer part of the roller is heated and the core part is cooled at the same time. Based on the heat conduction control equation and the measured boundary condition of the temperature sensor, the heat dissipation amount of the rolling process is calculated, and the heat dissipation amount is compensated. Compared with the compensation caused by the traditional surface temperature measurement, the temperature control is more accurate. The online preheating and dynamic temperature control of the main roller, the core roller and the taper roller are realized. 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 material. At the same time, the space occupied by the preheating material in the heating furnace is reduced, the waste of the space in the furnace is avoided, and finally the equipment yield is improved by 5%.

[0037] The heating control adopts a heat loss feedforward control strategy associated with the rotating speeds of the main roller, the upper taper roller and the lower taper roller, precisely controls the temperature 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℃ due to the influence of 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 taper roller and the lower taper roller within 10℃, which fully meets the strict requirements of high-temperature ring piece rolling on temperature stability.

[0038] Additional aspects and advantages of the application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0040] Figure 1 is a schematic diagram of a temperature control system of a ring rolling production line provided by the present application.

[0041] Figure 2 is a schematic diagram of a gas sub-pipe group in a temperature control system of a ring rolling production line provided by the present application.

[0042] Figure 3 is a schematic diagram of a combustion head and a cone roller in a temperature control system of a ring rolling production line provided by the present application.

[0043] Figure 4 is a temperature control principle diagram of a temperature control system of a ring rolling production line provided by the present application.

[0044] Reference signs:

[0045] 1, gas main pipeline; 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 rotation speed sensor; 6, core roller; 61, core roller temperature sensor; 7, cone roller; 71, cone roller rotation speed sensor; 72, cone roller temperature sensor; 4, bracket; 8, control system. DETAILED DESCRIPTION

[0046] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below in combination with the drawings in the present application. Obviously, the described embodiments are some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to 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.

[0047] The following will be described in combination with Figures 1 to 3The application discloses a temperature control system of a ring rolling production line, 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, and the two taper rollers 7 being used to adjust the thickness of the ring, the temperature control system 8 comprising:

[0048] a 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;

[0049] a plurality of groups of gas auxiliary pipes, each group of gas auxiliary pipes corresponding to the main roller 5, the core roller 6 and the taper roller 7, one end of the group of gas auxiliary pipes being formed into a connecting port and the other end being formed into a gas outlet, the connecting port being communicated with the gas main pipe 1, and the gas outlet being provided with a combustion head 38;

[0050] a plurality of temperature sensors, each of the temperature sensors corresponding to the main roller 5, the core roller 6 and the taper roller 7;

[0051] a control system 8 connected to the ring rolling production line, the gas main pipe 1, the group of gas auxiliary pipes, the combustion head 38 and the temperature sensors, the control system 8 being used to control the gas supply amount;

[0052] a ring initial machining temperature and a ring machining temperature threshold value are set in the control system, then the control system starts the gas main pipe and the group of gas auxiliary pipes, the gas enters the group of gas auxiliary pipes through the gas main pipe, and then the gas is ignited through the combustion head to heat the main roller, the core roller and the taper roller, the temperature sensors acquire the real-time temperatures of the main roller, the core roller and the taper roller, when the control system identifies that the real-time temperatures of the main roller, the core roller and the taper roller are equal to the ring initial machining temperature, the control system controls to close the gas main pipe and the group of gas auxiliary pipes, and then the control system controls to start the ring rolling production line to machine the ring;

[0053] in the ring machining process, the control system identifies the real-time temperatures 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 starts the gas main pipe and the corresponding group of gas auxiliary pipes to perform a temperature compensation operation;

[0054] The temperature compensation operation comprises the following steps: the control system obtains the total time of ring piece rolling, then generates a time discrete point set according to the total time of ring piece rolling, the control system generates a temperature discrete point set according to the initial processing temperature of the ring piece and the real-time temperature of the main roller, then generates a temperature-time curve according to the time discrete point set and the temperature discrete point set, then obtains the average heat flow density 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 piece processing process and the gas volume that needs to be compensated according to the average heat flow density, and then the control system controls the gas auxiliary pipe 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.

[0055] 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 piece during rolling is always within the required temperature range, greatly improving the size accuracy of the inner diameter, the outer diameter and the thickness of the ring piece, and optimizing the mechanical properties of the ring piece, 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 piece processing, making the ring piece rolling process continuous and efficient, and significantly improving the overall operation efficiency of the production line. The actual temperature demand of the main roller 5, the core roller 6 and the taper roller 7 is supplied with gas, realizing efficient use of energy and reducing the energy cost of production.

[0056] Preferably, the temperature control system 8 of the present application breaks through the limitation of traditional ring piece rolling "overall rough temperature control", adopts independent temperature control architecture of subassembly, and each of the main roller 5, the core roller 6 and the taper roller 7 is equipped with a gas auxiliary pipe group and a temperature sensor, realizing precise temperature control of each key component, and the temperature control precision reaches the leading level in the industry. Deep integration of the ring piece 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 stage and ring piece specification) according to production conditions, realize unmanned and intelligent temperature regulation and control, and represent the development direction of intelligent technology in the field of ring piece hot processing.

[0057] In a preferred embodiment of the temperature control system of a ring piece 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 auxiliary 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 sub-magnetic valve 29, a wind control module, a total magnetic valve 36 and a mixing module 37 arranged in sequence in the pipeline 13.

[0058] Preferably, the pipeline 13 is made of high-temperature-resistant and corrosion-resistant special alloy materials 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 to ensure that the gas supply is within a safe range, and immediately triggers an alarm and activates the shutoff valve 27 for emergency shutdown if the concentration exceeds the standard. The filter 23 effectively filters impurities and particulate matter in the gas to prevent blockage or damage to subsequent equipment. 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 to ensure stable and reliable system pressure. The solenoid valve 29 works in coordination with the master solenoid valve 36 to achieve independent control and overall coordination of gas supply, and the wind control module automatically adjusts the mixing ratio of gas and air according to the environmental wind speed and temperature to achieve the best combustion effect. The mixing module 37 delivers the fully mixed gas and air to the burner to ensure complete, efficient and environmentally friendly combustion.

[0059] Specifically, the wind control module includes a branch pipe 14 connected to one end of the pipeline 13, 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 the branch pipe 14 in sequence. The third electric ball valve 35 is located at the end of the branch pipe 14 close to the pipeline 13.

[0060] Preferably, the fan 31 generates negative pressure by rotating to cause the gas and air in the pipeline 13 to enter the branch pipe 14 in a certain ratio, 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 to ensure that the pressure fluctuates within a set range. If the pressure is abnormal, the second pressure switch 33 will immediately trigger an alarm and take appropriate measures. The flow regulating valve 34 accurately regulates the flow of gas and air entering the branch pipe 14 according to the combustion demand to ensure the accuracy of the mixing ratio. The third electric ball valve 35 controls the on-off of the branch pipe 14, which can quickly cut off the fluid flow in the branch pipe 14 to ensure safe operation when the wind control module needs to be adjusted or maintained.

[0061] Specifically, the mixing module 37 is a mixing chamber for moderating the gas and air.

[0062] Preferably, the mixing chamber has special flow guide structures that are helically distributed and can guide the gas and air to form an orderly rotational flow in the chamber. Through this rotational flow, the gas and air can be fully mixed in a large contact area, greatly improving the uniformity of the mixture.

[0063] Specifically, the control system 8 comprises an ignition controller connected to the combustion head 38, which is used to ignite the gas.

[0064] Preferably, the ignition controller is responsible for precisely 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 internally, and 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 are detected to reach the optimal ignition conditions, the ignition controller will quickly issue an ignition instruction to make the combustion head 38 ignite the mixed gas instantaneously, achieving stable and efficient combustion.

[0065] 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 taper rollers 7.

[0066] 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 taper roller 7, and guarantee the performance stability of the subsequent processing of the ring. The 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, and thus adapt to various production process scenarios, enhancing the process adaptation ability of the equipment.

[0067] Further, it further comprises a bracket 4, the bottom of the bracket 4 is provided with casters, the gas sub-pipe groups are placed in the bracket 4, and the pipeline 13 is a hose.

[0068] Preferably, the position of the gas sub-pipe groups can be flexibly adjusted according to actual production needs by the bracket 4, without the need for a large amount of manpower for carrying. The hose is used as the pipeline 13, which can adapt to the position change of the gas sub-pipe groups on the one hand, and ensure the normal delivery of the gas; on the other hand, the hose has a certain flexibility and tensile resistance, and is not easy to be damaged due to vibration or movement of the equipment during the production process, ensuring the stable operation of the entire temperature control system 8.

[0069] Further, it further comprises a safety detection module, which is used to detect the gas concentration outside the gas sub-pipe groups. 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 groups.

[0070] Preferably, the safety detection module effectively improves the safety of the whole temperature control system 8, can timely find potential dangerous conditions such as gas leakage, and avoid serious accidents such as explosion and fire caused by too high gas concentration, thereby providing reliable safety guarantee for the production process. Meanwhile, 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 the production personnel and the normal operation of the equipment.

[0071] Preferably, the temperature sensor includes a main roller temperature sensor 51, a core roller temperature sensor 61 and a taper roller temperature sensor 72, which cooperate with each other to comprehensively and accurately obtain the temperature data of each key roller body in the ring rolling process, so as to accurately control the whole temperature control system.

[0072] Preferably, the main roller 5 is further provided with a main roller rotating speed sensor 52, and the taper roller 7 is further provided with a taper roller rotating speed sensor 71.

[0073] Preferably, in the ring processing process, due to the high-speed rotation of the main roller, the core roller and the taper roller, heat loss will exist, which will cause the temperature of the main roller, the core roller and the taper roller to continuously decrease, thereby easily causing the temperature of the main roller, the core roller and the taper roller to decrease, and affecting the processing quality of the ring.

[0074] Further, as shown in Figure 4 When the control system identifies that the real-time temperature of the main roller is less than the processing temperature threshold, the temperature compensation operation includes the following steps:

[0075] The control system obtains the initial parameters of the ring blank, sets the main roller rotating speed, the core roller rotating speed and the taper roller rotating speed, and then calculates the total rolling time of the ring, and the control system generates a time discrete point set according to the total rolling time of the ring , wherein is equal to the total rolling time of the ring, 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

[0076] 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​​ , ,

[0077] wherein, represents the thermal conductivity, represents the specific heat capacity, represents the ring density;

[0078] further calculates the average heat flux density of all time steps is:

[0079] The control system calculates the heat loss of the main roller, the core roller and the cone roller during the processing of the ring:

[0080]

[0081]

[0082]

[0083] The control system calculates the gas volume that needs to be compensated by the temperature control system:

[0084]

[0085] wherein, represents the heat loss of the main roller, represents the rotation speed of the main roller, represents the total time of ring rolling, represents the radius of the main roller, represents the height of the main roller, represents the heat loss of the cone roller, represents the rotation speed of the cone roller, represents the radius of the upper base of the cone roller, represents the radius of the lower base of the cone roller, represents the height of the cone roller, represents the heat loss of the core roller, represents the rotation speed of the cone roller, represents the height of the core roller, represents the radius of the main roller, represents the calorific value of the gas, represents the gas volume that needs to be compensated by the gas sub-pipeline corresponding to the main roller, represents the gas volume that needs to be compensated by the gas sub-pipeline corresponding to the core roller, represents the gas volume that needs to be compensated by the gas sub-pipeline corresponding to the cone roller, represents the total compensated gas volume;

[0086] The gas of is introduced into the gas main pipeline, and then The gas is introduced into the gas sub-pipeline corresponding to the main roller, The gas is introduced into the gas sub-pipeline corresponding to the core roller, The gas is introduced into the gas sub-pipeline corresponding to the taper roller, and the combustion head ignites the gas to compensate the temperature of the main roller, the core roller and the taper roller, 、 、 After the gas is burned out, all the gas sub-pipeline groups are closed.

[0087] Preferably, The value is the thermal conductivity coefficient of each roller at different temperatures, as shown in Table 1.

[0088] Table 1

[0089]

[0090] Preferably, during the execution of the temperature compensation operation, the control system continuously monitors the real-time temperature of the main roller, the core roller and the taper roller, and dynamically compares it 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 gas compensation volume to ensure that the temperature of each roller is stably maintained within the threshold range during subsequent processing. At the same time, the control system records the gas consumption data of each temperature compensation, including the actual amount of gas introduced into the gas sub-pipeline of the main roller, the core roller and the taper roller, and performs deviation analysis with the theoretical calculation value, stores the deviation data to the system database, and uses it for subsequent optimization of the temperature compensation algorithm. When the total time of the ring piece rolling ends, the control system automatically closes the gas main pipeline and all the gas sub-pipeline, and generates a temperature compensation report for this processing, which contains the temperature change curve of each roller, gas consumption statistics and compensation effect evaluation, providing data support for subsequent production and improving the temperature control accuracy during ring piece processing.

[0091] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing examples, or make equivalent replacements for some of the technical features; 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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