CN115518979A - Local induction heating bending forming process for angle steel - Google Patents
Local induction heating bending forming process for angle steel Download PDFInfo
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- CN115518979A CN115518979A CN202211149891.8A CN202211149891A CN115518979A CN 115518979 A CN115518979 A CN 115518979A CN 202211149891 A CN202211149891 A CN 202211149891A CN 115518979 A CN115518979 A CN 115518979A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 132
- 239000010959 steel Substances 0.000 title claims abstract description 132
- 238000010438 heat treatment Methods 0.000 title claims abstract description 119
- 238000000034 method Methods 0.000 title claims abstract description 58
- 230000008569 process Effects 0.000 title claims abstract description 45
- 230000006698 induction Effects 0.000 title claims abstract description 38
- 238000005452 bending Methods 0.000 title claims abstract description 21
- 230000005674 electromagnetic induction Effects 0.000 claims abstract description 24
- 238000005096 rolling process Methods 0.000 claims abstract description 24
- 238000013000 roll bending Methods 0.000 claims abstract description 16
- 238000009826 distribution Methods 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000007493 shaping process Methods 0.000 claims description 7
- 238000004458 analytical method Methods 0.000 claims description 6
- 238000013003 hot bending Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 230000004907 flux Effects 0.000 claims description 3
- 238000004088 simulation Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 230000002277 temperature effect Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000013519 translation Methods 0.000 claims description 2
- 238000001953 recrystallisation Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 9
- 230000009471 action Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000005097 cold rolling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/12—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel in a continuous process, i.e. without reversing stands
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/20—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2275/00—Mill drive parameters
- B21B2275/02—Speed
- B21B2275/04—Roll speed
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention provides a local induction heating bending forming process for angle steel, which comprises the following steps of S1, setting an electromagnetic induction heating device, S2, confirming factors influencing heating temperature, S3, setting forming passes, S4, setting a roller deformation angle, S5, setting a starting rolling speed, setting a rolling speed curve according to the forming speed, and determining the rolling speed; s6, after determining equipment and parameters, positioning the steel plate below the electromagnetic induction heating device, and S7, starting the heating device; s8, after the steel plate reaches the required temperature, enabling the steel plate to pass through an induction heating coil at a constant speed before entering a pass; s9, after the continuous heating of the steel plate is finished; s10, analyzing the springback angle of the formed steel plate, heating the bent angle forming area to be higher than the recrystallization temperature before roll bending forming, so that the forming pass can be reduced while the single-pass forming angle is improved, the process and the cost are simplified, the product quality is improved, and the springback is reduced.
Description
Technical Field
The invention belongs to the technical field of local bending and forming processes of angle steel, and particularly relates to a local induction heating bending and forming process of angle steel.
Background
The yield of roll bending formed steel in China is about 600 ten thousand tons every year, the numerical value is increased two years by two years along with the increase of the demand of various industries on thin-wall light-weight section steel, and the roll bending section steel has huge development potential. Roll bending forming is an efficient and advanced plate forming process, and the section steel product has the advantages of high economic benefit, high product precision, good surface quality, low energy consumption, various cross-sectional shapes and the like, and is widely applied to the industries of automobiles, ships, electric power, buildings and the like. With the social requirements on energy conservation, environmental protection, precision manufacturing and high automation in the field of material forming, the traditional heating equipment of a hot processing workshop with the problems of huge heat energy consumption, low heat efficiency, serious pollution and the like cannot meet the requirements, so that the electromagnetic induction heating technology with flexible device, energy conservation, environmental protection, low consumption and low oxidation becomes an advanced and reliable heating technology in the hot processing forming process.
The hot bending forming process combines an induction heating technology and a roll bending forming technology, the forming or forming deformation process of the process is three-dimensional elastic-plastic large deformation, including elastic deformation, plastic deformation, longitudinal deformation and transverse bending deformation, the process relates to calculation of an electromagnetic field and a temperature field, the influence factors on a heating result are more, and the process is more complex.
The prior traditional roll bending forming technology comprises the following steps: the defects of more forming passes, serious roller loss, serious product rebound and the like increase the processing difficulty of the high-strength steel. The existing domestic patents are consulted to find that the forming method of the angle steel mainly applies the cold rolling technology, the Chinese patent application number is CN200810059010.7, and the patent name is as follows: provided are an angle steel manufacturing method and angle steel forming equipment. The forming method for improving the mechanical property of the angle steel comprises the steps of preliminary shaping, step-by-step forming, shaping and automatic cutting of a steel plate, wherein the conventional cold rolling technology is still adopted for the preliminary shaping and the step-by-step forming of the steel plate, high-frequency quenching, tempering and cooling treatment are carried out between the step-by-step forming and the shaping in order to improve the mechanical property of the angle steel, and although the method can better improve the forming quality of the angle steel, the process steps are more, and the energy consumption is higher. The Chinese patent application number is CN200810059011.1, and the patent name is as follows: the continuous angle steel heat treatment method and the angle steel manufacturing method similarly provide that after the step-by-step cold rolling forming is carried out, the characteristics of the semi-finished angle steel are improved by utilizing a heat treatment process, the process links are complex, and the production cost is improved.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a local induction heating bending forming process for angle steel to solve the problems in the background art.
In order to solve the technical problems, the invention adopts the technical scheme that: a local induction heating bending forming process for angle steel comprises the following steps:
s1, arranging an electromagnetic induction heating device, wherein the electromagnetic induction heating device comprises materials, shapes and positions;
s2, confirming the heating frequency, the current magnitude and the air gap value which influence the heating temperature, and the moving speed of the steel plate;
s3, setting forming passes, integrating mechanical properties, heating temperature effects and hole pattern parameters, and determining that the roll bending forming passes of the steel plate in the plastic deformation stage are 4 or 5 passes;
s4, setting a deformation angle of the roller, wherein the deformation angle of 5 passes is 0-20-50-80-90 degrees, and the deformation angle of 4 passes is 30-50-80-90 degrees;
s5, setting a starting rolling speed, setting a rolling speed curve according to the forming speed, and determining the rolling speed;
s6, after equipment and parameters are determined, positioning the steel plate 5-15 mm below the electromagnetic induction heating device according to the size of the air gap;
s7, starting the heating device, introducing current, and waiting for the heating device to be heated to reach the maximum temperature required by the steel plate;
s8, after the steel plate reaches the required temperature, enabling the steel plate to pass through the induction heating coil at a constant speed before entering a pass;
s9, after the continuous heating of the steel plate is completed, firstly, forming of a straight roller is carried out in the first pass, and then rolling is started, so that the steel plate is ensured to have enough initial speed to enter the forming pass;
and S10, analyzing the springback angle of the formed steel plate, confirming whether the parameters and the performance of the angle steel meet the requirements or not, and finishing the forming process.
Preferably, in S1, the electromagnetic induction heating device selects transverse flux induction heating on induction heating, the coils are arranged on one side, the coils are kept stationary and move at a constant speed relative to the steel plate, so as to achieve a continuous local heating effect on the long direction of the plate, the electromagnetic induction heating coil is a coil formed by winding a hollow copper tube, and is in a rectangular, disc or spiral shape, the maximum width of the electromagnetic induction heating coil in the long direction of the vertical plate is not more than the width of the steel plate and is more than half of the width of the steel plate, and the electromagnetic induction heating coil is symmetrically arranged on the central line of the steel plate, so that the transverse heating zone has an obvious core heating zone, a heat affected zone and an unheated zone.
Preferably, in S2, the heating temperature is controlled by establishing a relationship between the temperature field and the frequency, the current and the air gap, and researching the influence of the frequency and the current on the distribution of the temperature field by using an orthogonal test, and since the frequency and the current are both in a linear relationship with the temperature, the purpose of increasing the maximum heating temperature of the steel plate can be achieved by increasing the frequency and the current in combination with the heating temperature required by the specific steel plate; in the continuous induction heating process of the steel plate, because the steel plate and the coil move mutually, in order to prevent collision between the steel plate and the coil in actual production, the air space between the steel plate and the coil is between 5mm and 15mm, a temperature distribution cloud picture in the thickness direction and the transverse direction of the steel plate is obtained by simulating the heating process by utilizing a finite element method, and the optimal parameters are determined;
preferably, the process of simulating the heating mould by using the finite element method is a unidirectional heat-force coupling process, the friction type is selected from a coulomb friction mode, the static friction factor is 0.4, and the dynamic friction factor is 0.3.
Preferably, in S3, the determination of the hot bending forming pass of the angle steel is determined by modeling and simulation operation.
Preferably, in S4, the total deformation angle in the forming process of the angle steel is 90 degrees, the local heating of the steel plate improves the shaping of the deformation zone, reduces the deformation resistance and springback of the deformation zone, and the bending angle of the first pass is determined to be 20-35 degrees by considering the total rolling pass, the operating speed of the workpiece and the distribution of the temperature field in combination with the cosine and the average distribution of the forming angle; the deformation angle is allocated to 0-20-50-80-90 degrees in the case of 5 molding passes, and to 0-30-80-90 degrees in the case of 4 molding passes.
Preferably, in S5, the initial rolling speed is set so that the steel sheet has a sufficient initial speed to enter the forming pass.
Preferably, in S8, the moving speed of the steel plate during heating is the moving speed of the steel plate before the steel plate enters the roll bending forming, so that the moving speed of the coil is ensured to be the same as the speed of the steel plate entering the first roll;
preferably, in S10, the springback angle analysis is performed on the formed steel plate after undergoing two stages of local electromagnetic induction heating and plastic deformation, and the springback angle analysis is compared with the cold roll forming springback angle under the same-pass rolling.
Compared with the prior art, the invention has the following advantages:
the hot-bending forming process is based on a local induction heating roll-bending forming technology, before roll-bending forming, a corner forming area is heated to a temperature higher than recrystallization temperature, deformation resistance is reduced, forming performance is improved, a single-pass forming angle can be improved, forming passes can be reduced, process and cost are simplified, product quality is improved, and resilience is reduced.
Drawings
FIG. 1 is a schematic view of a rectangular induction heating coil of the present invention;
FIG. 2 is a temperature profile of continuous induction heating of a steel sheet according to the present invention;
FIG. 3 is a diagram of a 4-pass forming process model of the present invention;
FIG. 4 is a schematic view of a 5-pass forming process model of the present invention;
FIG. 5 is a schematic view of the final forming of the 4-pass formed steel sheet of the present invention;
FIG. 6 is a schematic view of the 5-pass steel plate forming final forming of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The invention provides a technical scheme that: a local induction heating bending forming process for angle steel comprises the following steps:
s1, arranging an electromagnetic induction heating device which comprises materials, shapes and positions; the electromagnetic induction heating device selects transverse magnetic flux induction heating on induction heating, is arranged on one side, keeps a coil fixed and does uniform translation relative to a steel plate, and realizes a continuous local heating effect on the long direction of the plate, the electromagnetic induction heating coil is a coil formed by winding a hollow copper pipe and is in a rectangular, disc or spiral shape, the rectangular induction heating coil is shown in figure 1, the maximum width of the rectangular induction heating coil in the long direction of the vertical plate is not more than the width of the steel plate and is also more than half of the width of the steel plate, and the rectangular induction heating coil is symmetrically arranged by the central line of the steel plate, so that the transverse heating zone has obvious core heating zone, heat affected zone and unheated zone;
s2, confirming the heating frequency, the current magnitude and the air gap value which influence the heating temperature, and the moving speed of the steel plate; the heating temperature is controlled by establishing the relationship between a temperature field and frequency, current and air gap, researching the influence of the frequency and the current on the distribution of the temperature field by using an orthogonal test, and because the frequency and the current are in a linear relationship with the temperature, the purpose of increasing the maximum heating temperature of the steel plate can be achieved by combining the heating temperature required by a specific steel plate and increasing the frequency and the current; in the continuous induction heating process of the steel plate, because the steel plate and the coil move mutually, in order to prevent collision between the steel plate and the coil in actual production, the air space between the steel plate and the coil is between 5mm and 15mm, a temperature distribution cloud chart in the thickness direction and the transverse direction of the steel plate is obtained by simulating the heating process by using a finite element method, the optimal parameters are determined, and the temperature distribution chart of the continuous induction heating of the steel plate is shown in figure 2.
The process of simulating the heating mould by using the finite element method is a unidirectional thermal-force coupling process, the friction type selects a coulomb friction mode, the static friction factor is 0.4, and the dynamic friction factor is 0.3.
S3, setting forming passes, integrating mechanical properties, heating temperature effects and hole pattern parameters, determining that the roll bending forming passes of the steel plate in the plastic deformation stage are 4 or 5 passes, wherein 4-pass and 5-pass forming process model diagrams are shown in figures 3 and 4, and determining the hot bending forming passes of the angle steel through model establishment and simulation operation.
S4, setting a roller deformation angle, wherein the 5-pass deformation angle is 0-20-50-80-90 degrees, the 4-pass deformation angle is 30-50-80-90 degrees, the total deformation angle in the forming process of the angle steel is 90 degrees, the local heating of the steel plate improves the shaping of a deformation area, reduces the deformation resistance and resilience of the deformation area, and determines the bending angle of the first pass to be 20-35 degrees by considering the distribution of the total rolling pass, the work piece running speed and the temperature field in combination with the cosine and the average distribution of the forming angle; the deformation angle is distributed to be 0-20-50-80-90 degrees under the condition that the forming pass is 5, and is distributed to be 0-30-80-90 degrees under the condition that the forming pass is 4;
and S5, setting the initial rolling speed, setting a rolling speed curve according to the forming speed, and determining the rolling speed. Setting the initial rolling speed to ensure that the steel plate has enough initial speed to enter a forming pass;
s6, after determining equipment and parameters, positioning the steel plate 5-15 mm below the electromagnetic induction heating device according to the size of the air gap;
s7, starting the heating device, introducing current, and waiting for the heating device to be heated to reach the maximum temperature required by the steel plate;
and S8, after the steel plate reaches the required temperature, enabling the steel plate to pass through the induction heating coil at a constant speed before entering a pass, wherein the moving speed of the steel plate during heating is the moving speed of the steel plate before entering roll bending forming, so that the moving speed of the coil is ensured to be the same as the speed of the steel plate entering a first pass roller.
S9, after the continuous heating of the steel plate is finished, firstly, forming a straight roller in the first pass, and then, starting rolling to ensure that the steel plate has enough initial speed to enter the forming pass;
and S10, analyzing the springback angle of the formed steel plate, wherein the springback angle analysis is to perform springback analysis on the formed steel plate after two stages of local electromagnetic induction heating and plastic deformation, and comparing the springback angle of cold-roll forming under the same-pass rolling to confirm whether the parameters and the performance of the angle steel meet the requirements or not so as to finish the forming process.
The final forming diagrams of the formed steel sheets of 4 passes and 5 passes are shown in fig. 5 and 6.
The hot-bending forming process is based on a local induction heating roll-bending forming technology, before roll-bending forming, a corner forming area is heated to a temperature higher than recrystallization temperature, deformation resistance is reduced, forming performance is improved, a single-pass forming angle can be improved, forming passes can be reduced, the process and cost are simplified, product quality is improved, and resilience is reduced.
It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A local induction heating bending forming process for angle steel is characterized by comprising the following steps:
s1, arranging an electromagnetic induction heating device which comprises materials, shapes and positions;
s2, confirming the heating frequency, the current magnitude, the air gap value and the moving speed of the steel plate, which influence the heating temperature;
s3, setting forming passes, integrating mechanical properties, heating temperature effects and hole pattern parameters, and determining that the roll bending forming passes of the steel plate in the plastic deformation stage are 4 or 5 passes;
s4, setting a deformation angle of the roller, wherein the deformation angle of 5 passes is 0-20-50-80-90 degrees, and the deformation angle of 4 passes is 30-50-80-90 degrees;
s5, setting a starting rolling speed, setting a rolling speed curve according to the forming speed, and determining the rolling speed;
s6, after determining equipment and parameters, positioning the steel plate 5-15 mm below the electromagnetic induction heating device according to the size of the air gap;
s7, starting the heating device, introducing current, and waiting for the heating device to be heated to reach the maximum temperature required by the steel plate;
s8, after the steel plate reaches the required temperature, enabling the steel plate to pass through an induction heating coil at a constant speed before entering a pass;
s9, after the continuous heating of the steel plate is finished, firstly, forming a straight roller in the first pass, and then, starting rolling to ensure that the steel plate has enough initial speed to enter the forming pass;
and S10, analyzing the springback angle of the formed steel plate, confirming whether the parameters and the performance of the angle steel meet the requirements or not, and finishing the forming process.
2. The local induction heating bending forming process of the angle steel according to claim 1, wherein in S1, an electromagnetic induction heating device selects transverse magnetic flux induction heating on induction heating, the electromagnetic induction heating device is arranged on one side, a coil is kept to be fixed and does uniform translation relative to a steel plate, so that a continuous local heating effect on the length direction of the plate is realized, the electromagnetic induction heating coil is a coil wound by a hollow copper tube and is rectangular, disc-shaped or spiral coil, the maximum width of the electromagnetic induction heating coil in the length direction of a vertical plate is not more than the width of the steel plate and is more than half of the width of the steel plate, and the electromagnetic induction heating coil is symmetrically arranged by using the center line of the steel plate, so that obvious core heating zones, heat affected zones and unheated zones exist in the transverse heating zones.
3. The local induction heating bending forming process for angle steel according to claim 1, characterized in that in S2, the heating temperature is controlled by establishing the relationship between a temperature field and frequency, current and air gap, and utilizing an orthogonal test to study the influence of the frequency and current on the distribution of the temperature field, and since the frequency and the current are in a linear relationship with the temperature, the frequency and the current are increased in combination with the heating temperature required by a specific steel plate, so that the purpose of increasing the maximum heating temperature of the steel plate can be achieved; in the continuous induction heating process of the steel plate, because the steel plate and the coil move mutually, in order to prevent collision between the steel plate and the coil in actual production, the air space between the steel plate and the coil is between 5mm and 15mm, a temperature distribution cloud picture in the thickness direction and the transverse direction of the steel plate is obtained by simulating the heating process by utilizing a finite element method, and the optimal parameters are determined;
4. the local induction heating bending forming process for angle steel according to claim 3, wherein the process of simulating the heating mold by using the finite element method is a unidirectional thermal-force coupling process, the friction type is selected from a coulomb friction mode, the static friction factor is 0.4, and the dynamic friction factor is 0.3.
5. The local induction heating bending forming process of the angle steel according to the claim 1, wherein in S3, the determination of the hot bending forming pass of the angle steel is determined by modeling and simulation operation.
6. The local induction heating bending forming process of the angle steel as claimed in claim 1, wherein in S4, the total deformation angle in the forming process of the angle steel is 90 degrees, the local heating of the steel plate improves the shaping of the deformation zone, reduces the deformation resistance and resilience of the deformation zone, and the bending angle of the first pass is determined to be 20-35 degrees in consideration of the total rolling passes, the work piece running speed and the distribution of the temperature field in combination with the cosine and the average distribution of the forming angle; the deformation angle is distributed to 0-20-50-80-90 degrees when the forming pass is 5, and 0-30-80-90 degrees when the forming pass is 4.
7. The local induction heating bending forming process of angle steel according to claim 1, wherein in S5, the initial rolling speed is set so that the steel plate has enough initial speed to enter the forming pass.
8. The local induction heating bending forming process of angle steel according to claim 1, wherein in S8, the moving speed of the steel plate during heating is the moving speed of the steel plate before the steel plate enters the roll bending forming, so that the moving speed of the coil is ensured to be the same as the speed of the steel plate entering the first roll;
9. the local induction heating bending forming process of the angle steel according to claim 1, wherein in the step S10, the springback angle analysis is performed on the formed steel plate after two stages of local electromagnetic induction heating and plastic deformation, and the springback angle analysis is compared with the cold-roll forming springback angle under the same rolling pass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211149891.8A CN115518979A (en) | 2022-09-21 | 2022-09-21 | Local induction heating bending forming process for angle steel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211149891.8A CN115518979A (en) | 2022-09-21 | 2022-09-21 | Local induction heating bending forming process for angle steel |
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| CN115518979A true CN115518979A (en) | 2022-12-27 |
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| CN202211149891.8A Pending CN115518979A (en) | 2022-09-21 | 2022-09-21 | Local induction heating bending forming process for angle steel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116159909A (en) * | 2023-04-24 | 2023-05-26 | 太原科技大学 | Hole type forming method and forming roller for thickening corner of rectangular steel pipe |
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2022
- 2022-09-21 CN CN202211149891.8A patent/CN115518979A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116159909A (en) * | 2023-04-24 | 2023-05-26 | 太原科技大学 | Hole type forming method and forming roller for thickening corner of rectangular steel pipe |
| CN116159909B (en) * | 2023-04-24 | 2023-07-25 | 太原科技大学 | Hole type forming method and forming roller for thickening corner of rectangular steel pipe |
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