CN115592056B - Large-thickness-ratio interlayer shell ring rolling compounding method based on local high-temperature strong pressure - Google Patents
Large-thickness-ratio interlayer shell ring rolling compounding method based on local high-temperature strong pressure Download PDFInfo
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Abstract
The invention belongs to the technical field of large-scale shell ring forming and manufacturing, and particularly relates to a large-thickness-ratio interlayer shell ring rolling compounding method based on local high-temperature and strong pressure.
Description
Technical Field
The invention belongs to the technical field of large-scale shell ring forming and manufacturing, and particularly relates to a large-thickness ratio interlayer shell ring rolling composite method based on local high-temperature strong pressure.
Background
The large-scale shell ring is a key component in equipment such as nuclear power, rockets, petrochemicals and the like, and has extremely high requirements on the comprehensive performance because the large-scale shell ring works in high-temperature, high-pressure and corrosive environments for a long time. At present, large-scale shell rings are mainly made of simple-substance metal and are produced by a rolling method, and due to the fact that the large-scale shell rings are large in size, the whole heating process is dozens of hours, the wall thickness of the large-scale shell rings is large, the rolling reduction rate is low, the temperature drop in the rolling process is obvious, multiple times of heat supplement is needed, and energy consumption and the production period are greatly increased.
The interlayer shell section with the large thickness ratio is formed by compounding a plurality of components through interfaces, is divided into outer layer metal, middle layer metal and inner layer metal, is a structural and functional material with comprehensive properties of rigidity, strength, corrosion resistance, wear resistance and the like, metallurgical combination is formed among the component metals through special deformation and connection technology, the advantages of each component metal can be greatly exerted, the performance defect of a single metal is overcome, the application cost can be obviously reduced, the interlayer shell section has excellent comprehensive properties and economic benefits, and the interlayer shell section has wide application prospects in the fields of nuclear power, petrochemical industry, ocean engineering, power electronics, mechanical manufacturing, architectural decoration and the like. However, the existing bimetal compounding technologies such as explosion compounding, extrusion compounding, cast-rolling compounding and the like are only suitable for producing small-caliber bimetal composite pipes or composite plate strips, and cannot meet the production requirement of the large-thickness-ratio interlayer shell ring.
For the composition of component metal interfaces, the interface temperature and the interface stress state are of great importance, reasonable interface high temperature and strong pressure are key conditions for realizing metallurgical bonding of the composite interface, and particularly for rolling composition, the single-pass large deformation at high temperature is usually required, and the single-pass deformation amount is required to be more than 40%. However, the forming of the interlayer shell ring with the large thickness ratio faces a great challenge at present, the overall heating energy consumption of the shell ring is large due to the large size, the large self weight and the difficult precision control, the independent control requirements of the target deformation temperature of different component metals cannot be met, and the metallurgical bonding of a composite interface cannot be realized due to the small deformation of a single pass in the rolling process.
With the high-speed development of industries such as nuclear power energy, aerospace, metallurgy and petrochemical industry in China, the demand for the interlayer shell ring with the large thickness ratio is increasing day by day, the target specification needs to be customized individually, and on the premise of realizing interface metallurgical bonding, the development of energy-saving and consumption-reducing efficient rolling composite equipment and method meeting the customization of the specification requirements of users is urgently needed.
Disclosure of Invention
The invention provides a rolling composite method of a large-thickness-ratio interlayer shell ring based on local high-temperature strong pressure aiming at the problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
a rolling compounding method of a large-thickness-ratio interlayer shell ring based on local high-temperature strong pressure comprises the following steps:
s1, sheathing an outer-layer metal cylinder, a middle-layer metal cylinder and an inner-layer metal cylinder together in a transition fit mode sequentially, welding the adjacent side parts of the outer-layer metal cylinder and the middle-layer metal cylinder and the adjacent side parts of the middle-layer metal cylinder and the inner-layer metal cylinder, and vacuumizing to complete the preparation of a prefabricated composite blank;
s2, sleeving the prefabricated composite blank on an auxiliary corrugated roller, controlling the main corrugated roller and the auxiliary corrugated roller to move relatively, clamping the prefabricated composite blank, positioning and supporting the prefabricated composite blank through a first flat guide roller and the auxiliary corrugated roller which are symmetrically arranged on the left side and the right side of the auxiliary corrugated roller, performing electromagnetic induction heating on the outer layer metal cylinder by using a first electromagnetic induction heating device to ensure that the core temperature of the outer layer metal cylinder is far higher than that of the middle layer metal cylinder, and heating a to-be-composited interface between the outer layer metal cylinder and the middle layer metal cylinder to a target temperature under the action of heat conductionT 1-1 (ii) a Electromagnetic induction heating is carried out on the inner-layer metal cylinder by utilizing a second electromagnetic induction heating device, so that the core temperature of the inner-layer metal cylinder is far higher than that of the middle-layer metal cylinder, and the to-be-compounded interface between the middle-layer metal cylinder and the inner-layer metal cylinder is heated to a target temperature under the action of heat conductionT 1-2 ；
S3, driving the main corrugated roller and the auxiliary corrugated roller to rotate at the same rolling line speed so as to drive the prefabricated composite blank to rotate, driving the main corrugated roller and the auxiliary corrugated roller to radially press down and continuously rotate after the heated part of the prefabricated composite blank is contacted with the main corrugated roller and the auxiliary corrugated roller, and finishing the preparation of the corrugated composite blank after the whole circle of the prefabricated composite blank is metallurgically combined, wherein the pressing-in amount of the main corrugated roller isΔh 1-1 The press-in amount of the auxiliary corrugating roller isΔh 1-2 The main corrugated roller and the auxiliary corrugated roller jointly form a corrugated rolling roller gap to promote metallurgical bonding between the outer layer metal cylinder and the middle layer metal cylinder and between the middle layer metal cylinder and the inner layer metal cylinder, and before the corrugated rolling starts, the surface of the prefabricated composite blank is free of corrugations, so that a first flat guide roller provides supporting force for the prefabricated composite blank;
s4, sleeving the corrugated composite blank on an auxiliary flat roller, controlling the main flat roller and the auxiliary flat roller to move relatively, clamping the corrugated composite blank, positioning and supporting the corrugated composite blank by a second corrugated guide roller and an auxiliary flat roller which are symmetrically arranged on the left side and the right side of the auxiliary flat roller, performing electromagnetic induction heating on the corrugated outer-layer metal cylinder by using a third electromagnetic induction heating device to enable the core temperature of the corrugated outer-layer metal cylinder to be far higher than that of the corrugated middle-layer metal cylinder, and heating a composite interface between the corrugated outer-layer metal cylinder and the corrugated middle-layer metal cylinder to a target temperature under the action of heat conductionT 2-1 (ii) a Electromagnetic induction heating is carried out on the corrugated inner layer metal cylinder by utilizing a fourth electromagnetic induction heating device, so that the core temperature of the corrugated inner layer metal cylinder is far higher than that of the corrugated middle layer metal cylinder, and heat conduction is realizedHeating the composite interface between the corrugated middle layer metal cylinder and the corrugated inner layer metal cylinder to a target temperature under the action ofT 2-2 ；
S5, driving the main flat roller and the auxiliary flat roller to rotate at the same rolling linear speed so as to drive the corrugated composite blank to rotate, driving the main flat roller and the auxiliary flat roller to radially press down and continuously rotate after the heated part of the corrugated composite blank is contacted with the main flat roller and the auxiliary flat roller, and finishing the continuous rolling composite process of the corrugated composite blank to the interlayer shell ring with the large thickness ratio after the whole circle of the corrugated composite blank is rolled and compounded, wherein the pressing-in amount of the main flat roller isΔh 2-1 The press-in amount of the auxiliary flat roll isΔh 2-2 The main flat roll and the auxiliary flat roll jointly form a flat rolling roll gap to promote metallurgical bonding between the corrugated outer layer metal cylinder and the corrugated middle layer metal cylinder and between the corrugated middle layer metal cylinder and the corrugated inner layer metal cylinder to complete preparation of the large thickness ratio interlayer shell ring.
Further, the shape of the corrugation on the main corrugated roller, the auxiliary corrugated roller, the first corrugated guide roller and the second corrugated guide roller is any one of sine, circular arc, triangle, trapezoid and spline curves, and the corrugations are uniformly distributed along the circumferential direction, the height of the corrugation on the main corrugated roller is less than 1/3 of the wall thickness of the outer metal cylinder, and the height of the corrugation on the auxiliary corrugated roller is less than 1/3 of the wall thickness of the inner metal cylinder.
Still further, the press-in amount of the main corrugated rollΔh 1-1 Greater than the height of the corrugation on the main corrugation roller and the press-in amount of the auxiliary corrugation rollerΔh 1-2 Greater than the corrugation on the auxiliary corrugating rollerHeight.
Further, the pressing amount of the main flat rollΔh 2-1 The height of the corrugation on the metal cylinder of the corrugated outer layer in the corrugated composite blank state is greater than the press-in amount of the auxiliary flat rollerΔh 2-2 Is larger than the height of the corrugation on the metal cylinder of the corrugated inner layer in the corrugated composite blank state.
Furthermore, the wall thickness of the outer layer metal cylinder and the wall thickness of the inner layer metal cylinder are both smaller than 1/8 of the wall thickness of the middle layer metal cylinder.
Compared with the prior art, the invention has the following advantages:
the rolling combination of the different-diameter different-temperature asynchronous corrugated roll gaps in the first stage is realized through the main corrugated roll, the auxiliary corrugated roll, the first electromagnetic induction heating device and the second electromagnetic induction heating device, the rolling combination of the different-diameter different-temperature asynchronous corrugated roll gaps in the second stage is realized through the main flat roll, the auxiliary flat roll, the third electromagnetic induction heating device and the fourth electromagnetic induction heating device, the temperatures of different composite interfaces in the combination process of the two stages are independently controlled through different electromagnetic induction heating devices, and the heating is only carried out in front of a rolling inlet, so that the local high temperature is formed at the composite interface, the problems of long integral heating time, high energy consumption and the like of the interlayer shell ring with large thickness ratio are solved, and the temperature independent control requirements when the target deformation temperatures of component metals are different can be met;
in the first stage of rolling and compounding process of the reducing and temperature-varying asynchronous corrugated roll gap, the wave crest of the main corrugated roll forms local high-temperature strong pressure at the prefabricated contact interface between the outer layer metal cylinder and the middle layer metal cylinder to promote the outer layer metal cylinder and the middle layer metal cylinder to form metallurgical bonding, and the wave crest of the auxiliary corrugated roll forms local high-temperature strong pressure at the prefabricated contact interface between the middle layer metal cylinder and the inner layer metal cylinder to promote the middle layer metal cylinder and the inner layer metal cylinder to form metallurgical bonding; in the rolling and compounding process of the different-diameter different-temperature asynchronous flat roll gap at the second stage, the main flat roll forms local high-temperature strong pressure at a corrugated compounding interface between the corrugated outer-layer metal cylinder and the corrugated middle-layer metal cylinder to promote the corrugated outer-layer metal cylinder and the corrugated middle-layer metal cylinder to form metallurgical bonding, and the auxiliary flat roll forms local high-temperature strong pressure at the corrugated compounding interface between the corrugated inner-layer metal cylinder and the corrugated middle-layer metal cylinder to promote the corrugated inner-layer metal cylinder and the corrugated middle-layer metal cylinder to form metallurgical bonding;
in the invention, the composite process of rolling the different-diameter different-temperature asynchronous corrugated roll gap in the first stage and the composite process of rolling the different-diameter different-temperature asynchronous flat roll gap in the second stage utilize corrugations to form local high-temperature strong pressure, thereby promoting the fresh metal of a composite interface to be exposed, and leading the finally obtained composite interface on the interlayer shell section with the large thickness ratio to be a three-dimensional space combination interface with macroscopic or microscopic corrugation appearance, obviously improving the interface combination strength, and realizing high-strength metallurgical combination;
in the first stage of rolling and compounding process of the reducing and temperature varying asynchronous corrugated roll gap, the outer surface of the prefabricated composite blank is changed into a corrugated shape from a smooth shape, and simultaneously, a first flat guide roll is replaced by a first corrugated guide roll along with the rolling and compounding; the outer surface of the corrugated composite blank is changed from corrugated shape to smooth in the rolling and compounding process of the different-diameter different-temperature asynchronous flat roll gap in the second stage, meanwhile, a second corrugated guide roll is replaced by a second flat guide roll along with the rolling and compounding, and the stable rolling and compounding of the interlayer shell ring with the large thickness ratio are realized by utilizing the dynamic alternate guide of the first flat guide roll and the first corrugated guide roll and the dynamic alternate guide of the second corrugated guide roll and the second flat guide roll.
Drawings
FIG. 1 is a composite schematic view of a first stage reducing and temperature varying asynchronous corrugated roll gap rolling according to the present invention;
FIG. 2 is a schematic structural view of a prefabricated composite blank of the present invention;
FIG. 3 is a composite view of the second stage asynchronous flat roll gap rolling with different diameters and different temperatures according to the present invention;
FIG. 4 is a schematic structural view of a corrugated composite blank according to the present invention;
in the figure, a main corrugated roller-1, an auxiliary corrugated roller-2, a prefabricated composite blank-3, a first flat guide roller-4, a first corrugated guide roller-5, a first electromagnetic induction heating device-6, a second electromagnetic induction heating device-7, a corrugated composite blank-8, a main flat roller-9, an auxiliary flat roller-10, a second corrugated guide roller-11, a second flat guide roller-12, a third electromagnetic induction heating device-13, a fourth electromagnetic induction heating device-14, an outer layer metal cylinder-301, a middle layer metal cylinder-302, an inner layer metal cylinder-303, a corrugated outer layer metal cylinder-801, a corrugated middle layer metal cylinder-802 and a corrugated inner layer metal cylinder-803.
Detailed Description
In order to further illustrate the technical solution of the present invention, the present invention is further illustrated by the following examples.
Example 1
Preparing a sandwich shell ring with a large thickness ratio of 316L stainless steel/Q420 low-alloy high-strength structural steel/SA 508-III ultra-low carbon stainless steel;
wherein the outer layer metal cylinder 301 is 316L stainless steel with an outer diameter of 6000mm, a wall thickness of 25mm and a height of 1000mm, the middle layer metal cylinder 302 is Q420 low-alloy high-strength structural steel with an outer diameter of 5950mm, a wall thickness of 450mm and a height of 1000mm, the inner layer metal cylinder 303 is SA 508-III ultra-low carbon stainless steel with an outer diameter of 5050mm, a wall thickness of 25mm and a height of 1000mm; the diameter of the main corrugated roller 1 is 2000mm, the height of corrugations is 8mm, the diameter of the auxiliary corrugated roller 2 is 500mm, the height of the corrugations is 8mm, the first electromagnetic induction heating device 6, the second electromagnetic induction heating device 7, the third electromagnetic induction heating device 13 and the fourth electromagnetic induction heating device 14 are all digital electromagnetic heaters special for stainless steel, the self-protection function is achieved, and the maximum heating temperature can reach 1600 ℃;
a rolling compounding method of a large-thickness-ratio interlayer shell ring based on local high-temperature and high-pressure is used for preparing a 316L stainless steel/Q420 low-alloy high-strength structural steel/SA 508-III ultra-low-carbon stainless steel large-thickness-ratio interlayer shell ring, and comprises the following steps:
s1, sheathing an outer layer metal cylinder 301, a middle layer metal cylinder 302 and an inner layer metal cylinder 303 together in a transition fit mode sequentially, welding the adjacent side parts of the outer layer metal cylinder 301 and the middle layer metal cylinder 302 and the adjacent side parts of the middle layer metal cylinder 302 and the inner layer metal cylinder 303, and vacuumizing to complete the preparation of a prefabricated composite blank 3;
s2, sleeving the prefabricated composite blank 3 on an auxiliary corrugated roller 2, controlling the main corrugated roller 1 and the auxiliary corrugated roller 2 to move relatively, clamping the prefabricated composite blank 3, positioning and supporting the prefabricated composite blank 3 through a first flat guide roller 4 and the auxiliary corrugated roller 2 which are symmetrically arranged at the left side and the right side of the auxiliary corrugated roller 2, performing electromagnetic induction heating on the outer layer metal cylinder 301 by using a first electromagnetic induction heating device 6 to ensure that the core temperature of the outer layer metal cylinder 301 is far higher than that of the middle layer metal cylinder 302, and heating a to-be-composited interface between the outer layer metal cylinder 301 and the middle layer metal cylinder 302 to a target temperature under the action of heat conductionT 1-1 =1100 ℃; the second electromagnetic induction heating device 7 is used for carrying out electromagnetic induction heating on the inner-layer metal cylinder 303, so that the core temperature of the inner-layer metal cylinder 303 is far higher than that of the middle-layer metal cylinder 302, and the interface to be compounded between the middle-layer metal cylinder 302 and the inner-layer metal cylinder 303 is heated to a target temperature under the action of heat conductionT 1-2 =1100℃；
S3, driving the main corrugated roller 1 and the auxiliary corrugated roller 2 to rotate at the same rolling linear speed so as to drive the prefabricated composite blank 3 to rotate, driving the main corrugated roller 1 and the auxiliary corrugated roller 2 to radially press down and continuously rotate after the heated part of the prefabricated composite blank 3 is contacted with the main corrugated roller 1 and the auxiliary corrugated roller 2, and finishing the preparation of a corrugated composite blank 8 after the whole circle of the prefabricated composite blank 3 is metallurgically combined, wherein the pressing amount of the main corrugated roller 1 is equal to that of the auxiliary corrugated roller 2Δh 1-1 =10mm, and the press-in amount of the auxiliary corrugating roll 2 isΔh 1-2 =10mm, the main corrugated roll 1 and the auxiliary corrugated roll 2 form a corrugated rolling roll gap together, so as to promote metallurgical bonding between the outer layer metal cylinder 301 and the middle layer metal cylinder 302 and between the middle layer metal cylinder 302 and the inner layer metal cylinder 303, before the start of corrugated rolling, the surface of the prefabricated composite blank 3 has no corrugation, therefore, the first flat guide roll 4 provides a supporting force for the prefabricated composite blank 3, in the rolling process, the outer surface of the prefabricated composite blank 3 rolls out the corrugation gradually, the first corrugated guide roll 5 arranged on one side of the first flat guide roll 4 enters along with the deformation of the prefabricated composite blank 3, and the two first flat guide rolls 4 enter along with the dynamic of the corresponding first corrugated guide roll 5 respectivelyPerforming dynamic withdrawal, and finally enabling the two first corrugated guide rollers 5 to be in contact with the corrugated composite blank 8 and provide support, and enabling the two first flat guide rollers 4 to be completely withdrawn, so that continuous rolling and compounding of the prefabricated composite blank 3 to the corrugated composite blank 8 are completed;
s4, sleeving the corrugated composite blank 8 on the auxiliary flat roller 10, controlling the main flat roller 9 and the auxiliary flat roller 10 to move relatively, clamping the corrugated composite blank 8, positioning and supporting the corrugated composite blank 8 through a second corrugated guide roller 11 and an auxiliary flat roller 10 which are symmetrically arranged on the left side and the right side of the auxiliary flat roller 10, performing electromagnetic induction heating on the corrugated outer-layer metal cylinder 801 by using a third electromagnetic induction heating device 13 to enable the core temperature of the corrugated outer-layer metal cylinder 801 to be far higher than that of the corrugated middle-layer metal cylinder 802, and heating a composite interface between the corrugated outer-layer metal cylinder 801 and the corrugated middle-layer metal cylinder 802 to a target temperature under the action of heat conductionT 2-1 =1000 ℃; electromagnetic induction heating is carried out on the corrugated inner layer metal cylinder 803 by utilizing the fourth electromagnetic induction heating device 14, so that the core temperature of the corrugated inner layer metal cylinder 803 is far higher than that of the corrugated middle layer metal cylinder 802, and the composite interface between the corrugated middle layer metal cylinder 802 and the corrugated inner layer metal cylinder 803 is heated to the target temperature under the action of heat conductionT 2-2 =1000℃；
S5, driving the main flat roller 9 and the auxiliary flat roller 10 to rotate at the same rolling linear speed so as to drive the corrugated composite blank 8 to rotate, driving the main flat roller 9 and the auxiliary flat roller 10 to radially press down and continuously rotate after the heated part of the corrugated composite blank 8 is contacted with the main flat roller 9 and the auxiliary flat roller 10, and finishing the continuous rolling composite process from the corrugated composite blank 8 to a large-thickness-ratio sandwich barrel section after the corrugated composite blank 8 is rolled and compounded for a whole circle, wherein the pressing amount of the main flat roller 9 is equal to that of the main flat roller 9Δh 2-1 =10mm, and the press-in amount of the auxiliary flat roll 10 isΔh 2-2 =10mm, the main flat roll 9 and the auxiliary flat roll 10 jointly form a flat rolling roll gap to promote metallurgical bonding to be formed between the corrugated outer layer metal cylinder 801 and the corrugated middle layer metal cylinder 802 and between the corrugated middle layer metal cylinder 802 and the corrugated inner layer metal cylinder 803, the preparation of the sandwich shell section with the large thickness ratio is finished, and before the flat rolling is started, the corrugated composite blank is subjected to the surface treatmentThe surface of the material 8 is corrugated, so that a second corrugated guide roller 11 provides a supporting force for the corrugated composite blank 8, in the rolling process, the outer surface of the corrugated composite blank 8 is gradually flattened, a second flat guide roller 12 arranged on one side of the second corrugated guide roller 11 dynamically enters along with the deformation of the corrugated composite blank 8, the two second corrugated guide rollers 11 dynamically exit along with the dynamic entrance of the corresponding second flat guide rollers 12 respectively, finally the two second flat guide rollers 12 contact with the interlayer cylindrical section with the large thickness ratio and provide support, and the two second corrugated guide rollers 11 completely exit.
Example 2
Preparing a TC4 titanium alloy/Q420 low-alloy high-strength structural steel/316L stainless steel interlayer shell section with a large thickness ratio;
the outer-layer metal cylinder 301 is made of TC4 titanium alloy, the outer diameter is 4000mm, the wall thickness is 20mm, the height is 1500mm, the middle-layer metal cylinder 302 is made of Q420 low-alloy high-strength structural steel, the outer diameter is 3960mm, the wall thickness is 460mm, the height is 1500mm, the inner-layer metal cylinder 303 is made of 316L stainless steel, and the outer diameter is 2040mm, the wall thickness is 20mm, and the height is 1500mm; the diameter of the main corrugated roller 1 is 2000mm, the height of corrugations is 6mm, the diameter of the auxiliary corrugated roller 2 is 500mm, the height of the corrugations is 5mm, the first electromagnetic induction heating device 6 and the third electromagnetic induction heating device 13 are digital electromagnetic heaters special for titanium alloy, the self-protection function is achieved, the maximum heating temperature can reach 1200 ℃, the second electromagnetic induction heating device 7 and the fourth electromagnetic induction heating device 14 are digital electromagnetic heaters special for stainless steel, the self-protection function is achieved, and the maximum heating temperature can reach 1600 ℃;
a rolling composite method of a large-thickness-ratio interlayer shell ring based on local high-temperature and high-pressure is used for preparing a TC4 titanium alloy/Q420 low-alloy high-strength structural steel/316L stainless steel large-thickness-ratio interlayer shell ring, and comprises the following steps:
s1, sheathing an outer layer metal cylinder 301, a middle layer metal cylinder 302 and an inner layer metal cylinder 303 together in a transition fit mode sequentially, welding the adjacent side parts of the outer layer metal cylinder 301 and the middle layer metal cylinder 302 and the adjacent side parts of the middle layer metal cylinder 302 and the inner layer metal cylinder 303, and vacuumizing to complete the preparation of a prefabricated composite blank 3;
s2, preparingThe composite blank manufacturing device comprises a main corrugated roller 1, an auxiliary corrugated roller 2, a first flat guide roller 4 and an auxiliary corrugated roller 2, wherein the main corrugated roller 1 and the auxiliary corrugated roller 2 are controlled to move relatively, the prefabricated composite blank 3 is clamped tightly, the positioning and the supporting of the prefabricated composite blank 3 are realized through a first flat guide roller 4 and the auxiliary corrugated roller 2 which are symmetrically arranged at the left side and the right side of the auxiliary corrugated roller 2, a first electromagnetic induction heating device 6 is utilized to carry out electromagnetic induction heating on an outer layer metal cylinder 301, the core temperature of the outer layer metal cylinder 301 is far higher than that of an intermediate layer metal cylinder 302, and a to-be-compounded interface between the outer layer metal cylinder 301 and the intermediate layer metal cylinder 302 is heated to a target temperature under the action of heat conductionT 1-1 =850 ℃; the second electromagnetic induction heating device 7 is used for carrying out electromagnetic induction heating on the inner-layer metal cylinder 303, so that the core temperature of the inner-layer metal cylinder 303 is far higher than that of the middle-layer metal cylinder 302, and the interface to be compounded between the middle-layer metal cylinder 302 and the inner-layer metal cylinder 303 is heated to a target temperature under the action of heat conductionT 1-2 =1150℃；
S3, driving the main corrugated roller 1 and the auxiliary corrugated roller 2 to rotate at the same rolling linear speed so as to drive the prefabricated composite blank 3 to rotate, driving the main corrugated roller 1 and the auxiliary corrugated roller 2 to radially press down and continuously rotate after the heated part of the prefabricated composite blank 3 is contacted with the main corrugated roller 1 and the auxiliary corrugated roller 2, and finishing the preparation of the corrugated composite blank 8 after the whole circle of the prefabricated composite blank 3 is metallurgically combined, wherein the pressing-in amount of the main corrugated roller 1 is equal to that of the main corrugated roller 1Δh 1-1 =8mm, and the press-in amount of the auxiliary corrugating roll 2 isΔh 1-2 =6mm, the main corrugated roll 1 and the auxiliary corrugated roll 2 form a corrugated rolling roll gap together, so as to promote metallurgical bonding between the outer layer metal cylinder 301 and the middle layer metal cylinder 302 and between the middle layer metal cylinder 302 and the inner layer metal cylinder 303, before the start of corrugated rolling, the surface of the prefabricated composite blank 3 has no corrugation, therefore, the first flat guide roll 4 provides a supporting force for the prefabricated composite blank 3, in the rolling process, the outer surface of the prefabricated composite blank 3 rolls out corrugations gradually, the first corrugated guide roll 5 arranged on one side of the first flat guide roll 4 enters along with the deformation of the prefabricated composite blank 3, the two first flat guide rolls 4 respectively enter along with the dynamic entering of the corresponding first corrugated guide roll 5 to dynamically exit, and finally, the two first corrugated guide rollsThe corrugated guide rollers 5 are in contact with the corrugated composite blank 8 and provide support, and the two first flat guide rollers 4 are completely withdrawn, so that continuous rolling and compositing from the prefabricated composite blank 3 to the corrugated composite blank 8 are completed;
s4, sleeving the corrugated composite blank 8 on an auxiliary flat roller 10, controlling a main flat roller 9 and the auxiliary flat roller 10 to move relatively, clamping the corrugated composite blank 8, positioning and supporting the corrugated composite blank 8 through a second corrugated guide roller 11 and an auxiliary flat roller 10 which are symmetrically arranged on the left side and the right side of the auxiliary flat roller 10, performing electromagnetic induction heating on the corrugated outer layer metal cylinder 801 by using a third electromagnetic induction heating device 13, enabling the core temperature of the corrugated outer layer metal cylinder 801 to be far higher than that of the corrugated middle layer metal cylinder 802, and heating a composite interface between the corrugated outer layer metal cylinder 801 and the corrugated middle layer metal cylinder 802 to a target temperature under the action of heat conductionT 2-1 =800 ℃; electromagnetic induction heating is carried out on the corrugated inner layer metal cylinder 803 by utilizing the fourth electromagnetic induction heating device 14, so that the core temperature of the corrugated inner layer metal cylinder 803 is far higher than that of the corrugated middle layer metal cylinder 802, and the composite interface between the corrugated middle layer metal cylinder 802 and the corrugated inner layer metal cylinder 803 is heated to the target temperature under the action of heat conductionT 2-2 =1050℃；
S5, driving the main flat roller 9 and the auxiliary flat roller 10 to rotate at the same rolling linear speed so as to drive the corrugated composite blank 8 to rotate, driving the main flat roller 9 and the auxiliary flat roller 10 to radially press down and continuously rotate after the heated part of the corrugated composite blank 8 is contacted with the main flat roller 9 and the auxiliary flat roller 10, and finishing the continuous rolling and compounding process of the corrugated composite blank 8 to the sandwich barrel section with the large thickness ratio after the corrugated composite blank 8 is completely rolled and compounded in a whole circle, wherein the pressing amount of the main flat roller 9 is equal to the pressing amountΔh 2-1 =8mm, and the press-in amount of the auxiliary flat roll 10 isΔh 2-2 =6mm, the main flat roll 9 and the auxiliary flat roll 10 jointly form a flat rolling roll gap to promote the metallurgical bonding between the corrugated outer layer metal cylinder 801 and the corrugated middle layer metal cylinder 802 and between the corrugated middle layer metal cylinder 802 and the corrugated inner layer metal cylinder 803, so as to complete the preparation of the sandwich shell section with large thickness ratio, and before the flat rolling, the surface of the corrugated composite blank 8 is corrugated, so that No. two corrugated composite blanks are formedThe guide rollers 11 provide supporting force for the corrugated composite blank 8, in the rolling process, the outer surface of the corrugated composite blank 8 is gradually rolled flat, the second flat guide roller 12 arranged on one side of the second corrugated guide roller 11 dynamically enters along with the deformation of the corrugated composite blank 8, the two second corrugated guide rollers 11 dynamically exit along with the dynamic entrance of the corresponding second flat guide roller 12, finally, the two second flat guide rollers 12 are in contact with the interlayer shell ring with the large thickness ratio and provide support, and the two second corrugated guide rollers 11 completely exit.
In the two embodiments, the shape of the corrugation on the main corrugation roller 1, the auxiliary corrugation roller 2, the first corrugation guide roller 5 and the second corrugation guide roller 11 is any one of sine, circular arc, triangle, trapezoid and spline curve.
While there have been shown and described what are at present considered to be the essential features and advantages of the invention, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. A rolling compounding method of a large-thickness-ratio interlayer shell ring based on local high-temperature strong pressure is characterized by comprising the following steps of: the method comprises the following steps:
s1, sheathing an outer layer metal cylinder (301), a middle layer metal cylinder (302) and an inner layer metal cylinder (303) together in a transition fit mode in sequence, welding the adjacent side parts of the outer layer metal cylinder (301) and the middle layer metal cylinder (302) and the adjacent side parts of the middle layer metal cylinder (302) and the inner layer metal cylinder (303), and vacuumizing to complete the preparation of a prefabricated composite blank (3);
s2, sleeving a prefabricated composite blank (3) on an auxiliary corrugated roller (2), controlling a main corrugated roller (1) and the auxiliary corrugated roller (2) to move relatively, clamping the prefabricated composite blank (3), wherein the height of corrugations on the main corrugated roller (1) is smaller than 1/3 of the wall thickness of an outer-layer metal cylinder (301), the height of corrugations on the auxiliary corrugated roller (2) is smaller than 1/3 of the wall thickness of an inner-layer metal cylinder (303), positioning and supporting the prefabricated composite blank (3) are realized through a number one flat guide roller (4) and the auxiliary corrugated roller (2) which are symmetrically arranged on the left side and the right side of the auxiliary corrugated roller (2), electromagnetic induction heating is carried out on the outer-layer metal cylinder (301) by utilizing a number one electromagnetic induction heating device (6), the core temperature of the outer-layer metal cylinder (301) is far higher than that of the middle-layer metal cylinder (302), and a composite interface to be heated between the outer-layer metal cylinder (301) and the middle-layer metal cylinder (302) is heated to a target temperature T under the action of heat conduction 1-1 (ii) a The inner-layer metal cylinder (303) is subjected to electromagnetic induction heating by using a second electromagnetic induction heating device (7), so that the core temperature of the inner-layer metal cylinder (303) is far higher than that of the middle-layer metal cylinder (302), and a to-be-compounded interface between the middle-layer metal cylinder (302) and the inner-layer metal cylinder (303) is heated to a target temperature T under the action of heat conduction 1-2 ；
S3, driving the main corrugated roller (1) and the auxiliary corrugated roller (2) to rotate at the same rolling linear speed so as to drive the prefabricated composite blank (3) to rotate, driving the main corrugated roller (1) and the auxiliary corrugated roller (2) to radially press down and continuously rotate after the heated part of the prefabricated composite blank (3) is contacted with the main corrugated roller (1) and the auxiliary corrugated roller (2), and finishing the preparation of the corrugated composite blank (8) after the whole circle of the prefabricated composite blank (3) is metallurgically combined, wherein the press-in amount of the main corrugated roller (1) is delta h 1-1 The press-in amount of the auxiliary corrugated roll (2) is delta h 1-2 The main corrugated roll (1) and the auxiliary corrugated roll (2) jointly form a corrugated rolling roll gap to promote the positions between the outer layer metal cylinder (301) and the middle layer metal cylinder (302) and between the middle layer metal cylinder (302) and the inner layer metal cylinder (303)Forming metallurgical bonding, wherein the surface of the prefabricated composite blank (3) is free of ripples before the start of ripple rolling, so that a first flat guide roller (4) provides a supporting force for the prefabricated composite blank (3), ripples are gradually rolled out on the outer surface of the prefabricated composite blank (3) in the rolling process, a first ripple guide roller (5) arranged on one side of the first flat guide roller (4) dynamically enters along with the deformation of the prefabricated composite blank (3), two first flat guide rollers (4) dynamically exit along with the dynamic entrance of the corresponding first ripple guide roller (5) respectively, finally, the two first ripple guide rollers (5) are in contact with and support the ripple composite blank (8), and the two first flat guide rollers (4) completely exit to complete the continuous rolling and compounding of the prefabricated composite blank (3) to the ripple composite blank (8);
s4, sleeving the corrugated composite blank (8) on an auxiliary flat roller (10), controlling a main flat roller (9) and the auxiliary flat roller (10) to move relatively, clamping the corrugated composite blank (8), positioning and supporting the corrugated composite blank (8) through a second corrugated guide roller (11) and the auxiliary flat roller (10) which are symmetrically arranged on the left side and the right side of the auxiliary flat roller (10), performing electromagnetic induction heating on a corrugated outer-layer metal cylinder (801) by using a third electromagnetic induction heating device (13), enabling the core temperature of the corrugated outer-layer metal cylinder (801) to be far higher than that of a corrugated middle-layer metal cylinder (802), and heating a composite interface between the corrugated outer-layer metal cylinder (801) and the corrugated middle-layer metal cylinder (802) to a target temperature T under the action of heat conduction 2-1 (ii) a Electromagnetic induction heating is carried out on the corrugated inner layer metal cylinder (803) by utilizing a fourth electromagnetic induction heating device (14), so that the core temperature of the corrugated inner layer metal cylinder (803) is far higher than that of the corrugated middle layer metal cylinder (802), and the composite interface between the corrugated middle layer metal cylinder (802) and the corrugated inner layer metal cylinder (803) is heated to a target temperature T under the action of heat conduction 2-2 ；
S5, driving the main flat roller (9) and the auxiliary flat roller (10) to rotate at the same rolling linear speed so as to drive the corrugated composite blank (8) to rotate, driving the main flat roller (9) and the auxiliary flat roller (10) to radially press down and continuously rotate after the heated part of the corrugated composite blank (8) is contacted with the main flat roller (9) and the auxiliary flat roller (10), and finishing rolling and compounding the corrugated composite blank (8) after the whole circle of the corrugated composite blank is rolled and compoundedThe continuous rolling composite process from the material (8) to the interlayer shell ring with the large thickness ratio is carried out, wherein the press-in amount of the main flat roll (9) is delta h 2-1 The press-in amount of the auxiliary flat roll (10) is delta h 2-2 The main flat roll (9) and the auxiliary flat roll (10) jointly form a flat rolling roll gap to promote metallurgical bonding between the corrugated outer layer metal cylinder (801) and the corrugated middle layer metal cylinder (802) and between the corrugated middle layer metal cylinder (802) and the corrugated inner layer metal cylinder (803) to complete preparation of the sandwich shell section with the large thickness ratio, before flat rolling starts, the surface of the corrugated composite blank (8) is corrugated, so that the corrugated composite blank (8) is supported by the second corrugated guide roll (11), the outer surface of the corrugated composite blank (8) is gradually flattened in the rolling process, the second flat guide roll (12) arranged on one side of the second corrugated guide roll (11) dynamically enters along with deformation of the corrugated composite blank (8), the two second corrugated guide rolls (11) dynamically exit along with dynamic entrance of the corresponding second flat guide rolls (12), finally the two second flat guide rolls (12) contact with the sandwich shell section with the large thickness ratio to provide support, and the two second corrugated guide rolls (11) completely exit.
2. The large-thickness-ratio sandwich shell ring rolling composite method based on local high-temperature strong pressing as claimed in claim 1, is characterized in that: the shape of the corrugations on the main corrugated roller (1), the auxiliary corrugated roller (2), the first corrugated guide roller (5) and the second corrugated guide roller (11) is any one of sine, circular arc, triangle, trapezoid and spline curves, and the corrugations are uniformly distributed along the circumferential direction.
3. The rolling and compounding method of the sandwich shell ring with the large thickness ratio based on the local high-temperature strong pressure as claimed in claim 1 is characterized in that: the press-in amount delta h of the main corrugated roller (1) 1-1 Is larger than the height of the corrugation on the main corrugated roll (1), and the press-in amount delta h of the auxiliary corrugated roll (2) 1-2 Is larger than the height of the corrugation on the auxiliary corrugation roller (2).
4. The rolling and compounding method of the sandwich shell ring with the large thickness ratio based on the local high-temperature strong pressure as claimed in claim 1 is characterized in that: the press-in amount delta h of the main flat roll (9) 2-1 The height of the corrugation on the corrugated outer layer metal cylinder (801) is larger than that of the corrugated composite blank (8), and the press-in amount delta h of the auxiliary flat roller (10) 2-2 Is larger than the height of the corrugation on the corrugated inner layer metal cylinder (803) in the state of the corrugated composite blank (8).
5. The rolling and compounding method of the sandwich shell ring with the large thickness ratio based on the local high-temperature strong pressure as claimed in claim 1 is characterized in that: the wall thickness of the outer layer metal cylinder (301) and the wall thickness of the inner layer metal cylinder (303) are both smaller than 1/8 of the wall thickness of the middle layer metal cylinder (302).
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