AU2020100509A4 - Device and method for roll-forming steel sheet by hot forming - Google Patents
Device and method for roll-forming steel sheet by hot forming Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 44
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 18
- 239000010959 steel Substances 0.000 title claims abstract description 18
- 238000010791 quenching Methods 0.000 claims abstract description 126
- 230000000171 quenching effect Effects 0.000 claims abstract description 121
- 238000010438 heat treatment Methods 0.000 claims abstract description 78
- 230000008569 process Effects 0.000 claims description 32
- 239000000110 cooling liquid Substances 0.000 claims description 23
- 238000012937 correction Methods 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 16
- 238000005520 cutting process Methods 0.000 claims description 14
- 230000006698 induction Effects 0.000 claims description 11
- 238000003672 processing method Methods 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 6
- 238000010924 continuous production Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000005097 cold rolling Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 8
- 238000005452 bending Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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 present invention discloses a device and method for roll-forming a steel sheet by hot forming. The device includes a device body, where the device body is provided with an initial positioning roller, a forming roller, a heating device, a control box, a quenching device, a correcting and positioning roller and a blanking and positioning roller; the initial positioning roller is disposed at a feed inlet of the device body; there are multiple forming rollers arranged in order; the heating device is fixed on the control box, and the control box controls the operation of the heating device; the quenching device is located in front of the control box; there are multiple stages of correcting and positioning rollers arranged in order; the blanking and positioning roller is disposed at a discharge outlet of the device body. The method includes: the initial positioning roller positions and clamps a raw sheet; the raw sheet is deformed in the forming roller, heated by the heating device, quenched by the quenching device, corrected by the correcting and positioning roller, and finally positioned by the blanking and positioning roller. The device and method apply the conventional cold rolling technology to the hot forming technology and improve the performance of a part.
Description
DEVICE AND METHOD FOR ROLL-FORMING STEEL SHEET BY HOT FORMING TECHNICAL FIELD
The present invention relates to a device and method, and in particular, to a device and method for roll-forming a steel sheet by hot forming.
BACKGROUND
Rolling is a mature technology for designing and manufacturing various types of steel sheets. However, rolling is currently only a cold forming technology, and there is no way to roll the sheet after heating, especially in the application of hot-formed steel such as 22MnB5. Although the rigidity and strength of parts produced by cold rolling become increasingly higher, the cold forming technology is still limited. It is difficult to control the accuracy of parts, the consistency of parts is poor, the performance of parts is single, and performance gradient cannot be formed at different positions or different thicknesses of parts.
SUMMARY
In order to solve the above shortcomings in the prior art, the present invention provides a device and method for roll-forming a steel sheet by hot forming.
To resolve the above problem, the present invention adopts the following technical solutions: A device for roll-forming a steel sheet by hot forming includes a device body, where the device body is provided with an initial positioning roller, a forming roller, a heating device, a control box, a quenching device, a correcting and positioning roller and a blanking and positioning roller in this order;
the initial positioning roller includes an initial positioning top roller and an initial positioning down roller; the initial positioning down roller is disposed directly below the initial positioning top roller, and the initial positioning down roller and the initial positioning top roller are jointly disposed at a feed inlet of the device body; a raw sheet is positioned and clamped by the initial positioning roller; the initial positioning roller rolls to drive the raw sheet to move forward to the forming roller;
the forming roller is located in front of the initial positioning roller; there are multiple forming rollers, and the multiple forming rollers are arranged in order; each forming roller is composed of a forming top roller and a forming down roller, which match each other; the forming top roller and the forming down roller press and deform the raw sheet, and move the raw sheet continuously to the heating device during a forming process;
2020100509 02 Apr 2020 the heating device is located in front of the forming roller, and the operation of the heating device is controlled by the control box; the control box is located in front of the forming roller, and includes a box body; a side wall of the box body is provided with a control screen, a power supply control button and a power control button; the heating device is fixedly installed on a lower part of the box body; the heating device is used to rapidly heat the raw sheet at a high temperature when the deformed sheet passes through the heating device;
the quenching device is located in front of the control box, and the quenching device rapidly quenches the deformed sheet heated at a high temperature;
the correcting and positioning roller is located in front of the quenching device; there are multiple stages of correcting and positioning rollers, and the multiple stages of correcting and positioning rollers are arranged in order; each stage of correcting and positioning roller is composed of a correcting and positioning top roller and a correcting and positioning down roller, which match each other; the deformed sheet enters into a quenching correction process after being heated and quenched, and a final part is formed through the correction of the correcting and positioning top roller and correcting and positioning down roller; the correcting and positioning roller rolls to move the final part forward to a blanking and positioning roller;
the blanking and positioning roller is located in front of the correcting and positioning roller; the blanking and positioning roller includes a blanking and positioning top roller and a blanking and positioning down roller; the blanking and positioning down roller is disposed directly below the blanking and positioning top roller, and the blanking and positioning top roller and the blanking and positioning down roller are jointly disposed at a discharge outlet of the device body; the final part is positioned by the blanking and positioning roller for a downstream automatic picking device to accurately grasp.
Further, there are seven forming rollers, sequentially, a first forming roller, a second forming roller, a third forming roller, a fourth forming roller, a fifth forming roller, a sixth forming roller and a seventh forming roller; the first forming roller is composed of a first forming top roller and a first forming down roller which match each other; the second forming roller is composed of a second forming top roller and a second forming down roller which match each other; the third forming roller is composed of a third forming top roller and a third forming down roller which match each other; the fourth forming roller is composed of a fourth forming top roller and a fourth forming down roller which match each other; the fifth forming roller is composed of a fifth forming top roller and a fifth forming down roller which match each other; the sixth forming roller is composed of a sixth forming top roller and a sixth forming down roller which match each other; the seventh forming roller is composed of a seventh forming top roller and a seventh forming down roller which match each other;
2020100509 02 Apr 2020 the first forming top roller, the second forming top roller, the third forming top roller, the fourth forming top roller, the fifth forming top roller, the sixth forming top roller and the seventh forming top roller are respectively provided with a top cutting face having a different inclination;
the first forming down roller, the second forming down roller, the third forming down roller, the fifth forming down roller and the seventh forming down roller are respectively provided with a down cutting face, which is correspondingly engaged with the respective top cutting face.
Further, the heating device is any one of an induction heating coil, a flame heater, a microwave heater and an electric heater.
Further, the quenching device is a surface quenching circulating system; the surface quenching circulating system includes a quenching circulating pipe, a quenching pressure pump box, a circulating collection tank and a quenching liquid nozzle; a quenching pressure pump is disposed in the quenching pressure pump box; the quenching circulating pipe communicates with the quenching liquid nozzle through the quenching pressure pump; the quenching circulating pipe also communicates with the circulating collection tank.
Further, there are four stages of correcting and positioning rollers, sequentially, a first-stage correcting and positioning roller, a second-stage correcting and positioning roller, a third-stage correcting and positioning roller and a fourth-stage correcting and positioning roller; the firststage correcting and positioning roller is composed of a first-stage correcting and positioning top roller and a first-stage correcting and positioning down roller which match each other; the second-stage correcting and positioning roller is composed of a second-stage correcting and positioning top roller and a second-stage correcting and positioning down roller which match each other; the third-stage correcting and positioning roller is composed of a third-stage correcting and positioning top roller and a third-stage correcting and positioning down roller which match each other; the fourth-stage correcting and positioning roller is composed of a fourth-stage correcting and positioning top roller and a fourth-stage correcting and positioning down roller which match each other.
The present invention further provides a processing method of the above device for rollforming a steel sheet by hot forming, where the processing method is a continuous production process, specifically as follows:
the initial positioning top roller and the initial positioning down roller position and clamp the raw sheet, and the initial positioning top roller and the initial positioning down roller roll to move the raw sheet forward;
2020100509 02 Apr 2020 the raw sheet moves to the forming roller, and the shape of the raw sheet is changed by pressing by the forming top roller and the forming down roller; at this time, the raw sheet is bent and a bottom fillet radius thereof is reduced; the forming of the raw sheet is completed by the pressing of multiple forming rollers;
during the forming process of the raw sheet, the raw sheet is gradually deformed into a deformed sheet; the deformed sheet continuously passes through the heating device, and is rapidly heated by the heating device; after being heated, the deformed sheet continues to move forward under the action of each roller, and enters the quenching device to quench a deformed surface thereof;
the deformed sheet enters into a quenching correction process after heating and surface quenching; during the quenching correction process, the part continues to move forward under the action of each roller, and enters the correcting and positioning roller to correct an unacceptable deformation occurring in the heating and quenching process; after the correction, the part is positioned by the blanking and positioning top roller and the blanking and positioning down roller for a downstream automatic picking device to accurately grasp.
Further, when the quenching device is a surface quenching circulating system, a cooling liquid is used for quenching; the quenching pressure pump in the quenching pressure pump box controls the spray speed and flow of the cooling liquid; the quenching liquid nozzle sprays the cooling liquid onto the surface of the part to realize quenching; after quenching, the cooling liquid falls into the quenching circulating liquid tank to be collected for the next quenching process.
The device and method for roll-forming a steel sheet by hot forming disclosed by the present invention apply the conventional cold rolling technology to the hot forming technology. A raw sheet is heated and quenched, and since quenching occurs on the surface of the part, there is an unheated and unquenched portion in the thickness direction. The present invention ensures the strength and rigidity of the quenched portion, and also ensures the good toughness of the unquenched portion, realizing the performance gradient in the thickness direction of the part. The present invention effectively improves the overall performance of the part, fully meets the production requirements of variable size and shape of the part, and effectively solves the problem of poor precision of the part.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is a schematic diagram of an overall structure of a device according to an example of the present invention.
2020100509 02 Apr 2020
FIG. 2 is a side view of FIG. 1.
FIG. 3 is a top view of FIG. 1.
FIG. 4 is a diagram showing a positional relationship between a top roller and a down roller of each forming process in FIG. 1.
FIG. 5 is a structural diagram of a control box of a heating device (an induction heating coil) according to the present invention.
FIG. 6 is a structural diagram of a control box of a heating device (a flame heater) according to the present invention.
FIG. 7 is a structural diagram of a quenching device (a surface quenching circulating system).
FIG. 8 is a schematic diagram of a raw sheet according to the present invention.
FIG. 9 is a schematic diagram of a deformed sheet according to an example of the present invention;
FIG. 10 is a schematic diagram of a to-be-corrected sheet (a part to undergo a quenching correction process) according to an example of the present invention.
FIG. 11 is a section view of FIG. 10.
Reference Numerals: 1. forming roller, 2. correcting and positioning roller, 3. heating device, 4. control box, 5. quenching device, 6. raw sheet, 7. deformed sheet, 8. to-be-corrected sheet, 11. initial positioning top roller, 12. initial positioning down roller, 13. first forming top roller, 14. first forming down roller, 15. second forming top roller, 16. second forming down roller, 17. third forming top roller, 18. third forming down roller, 19. fourth forming top roller, 110. fourth forming down roller, 111. fifth forming top roller, 112. fifth forming down roller, 113. sixth forming top roller, 114. sixth forming down roller, 115.seventh forming top roller, 116. seventh forming down roller, 21. first-stage correcting and positioning top roller, 22. first-stage correcting and positioning down roller, 23. second-stage correcting and positioning top roller, 24. second-stage correcting and positioning down roller, 25. third-stage correcting and positioning top roller, 26. third-stage correcting and positioning down roller, 27. fourth-stage correcting and positioning top roller, 28. fourth-stage correcting and positioning down roller, 31. blanking and positioning top roller, 31. blanking and positioning down roller, 311. induction heating coil, 312. flame heater, 41. box body, 43. control screen, 44. power supply control button, 45. power control button, 51. surface quenching circulating system, 511. quenching circulating pipe, 512. circulating collection tank, 513. quenching liquid nozzle, and 514. quenching pressure pump box.
2020100509 02 Apr 2020
DETAILED DESCRIPTION
The present invention is described in further detail below with reference to the accompanying drawings and specific examples.
A device for roll-forming a steel sheet by hot forming, including a device body, where the device body is provided with an initial positioning roller, a forming roller 1, a heating device 3, a control box 4, a quenching device 5, a correcting and positioning roller 2 and a blanking and positioning roller in this order.
As shown in FIG. 1, the initial positioning roller includes an initial positioning top roller 11 and an initial positioning down roller 12. The initial positioning down roller 12 is disposed directly below the initial positioning top roller 11, and the initial positioning down roller 12 and the initial positioning top roller 11 are jointly disposed at a feed inlet of the device body. A raw sheet 6 is positioned and clamped by the initial positioning roller for subsequent roll forming. The initial positioning roller rolls to drive the raw sheet 6 to move forward to the forming roller 1.
The forming roller 1 is located in front of the initial positioning roller. There are multiple forming rollers 1, and the multiple forming rollers are arranged in order. Each forming roller is composed of a forming top roller and a forming down roller, which match each other. The forming top roller and the forming down roller continuously press and deform the raw sheet 6, and move the raw sheet continuously to the heating device 3 during a forming process.
The heating device 3 is located in front of the forming roller 1, and the operation of the heating device 3 is controlled by the control box 4. The control box 4 is located in front of the forming roller 1, and includes a box body 41. A side wall of the box body 41 is provided with a control screen 43, a power supply control button 44 and a power control button 45. The control box 4 is used to regulate the heating device, and realize the setting of various parameters such as heating current, heating power, heating temperature and heating time of the heating device 3. The control box matches different heating devices 3. The control screen 43 is used to display various parameters during heating. The power supply control button 44 is connected to a power supply, and is used to switch the power supply on and off. The power control button 45 is used to adjust the power of the heating device 3.
The heating device 3 is fixedly installed on a lower part of the box body 1. The heating device 3 can have various forms such as an induction heating coil 311 as shown in FIG. 5, a flame heater 312 as shown in FIG. 6, a microwave heater and an electric heater. The heating device 3 is used to rapidly heat the raw sheet 6 at a high temperature when the deformed sheet
2020100509 02 Apr 2020 passes through the heating device 3. The heating device is regulated by the control box to heat the deformed sheet.
The quenching device 5 is located in front of the control box 4, and used to rapidly quench the deformed sheet heated at a high temperature. The quenching device can quench with a cooling liquid or a low-temperature gas. When a cooling liquid is used for quenching, the quenching device is a surface quenching circulating system 51 shown in FIG. 7. The surface quenching circulating system 51 includes a quenching circulating pipe 511, a quenching pressure pump box 514, a circulating collection tank 512 and a quenching liquid nozzle 513. A quenching pressure pump is disposed in the quenching pressure pump box 514. The quenching circulating pipe 511 communicates with the quenching liquid nozzle 513 through the quenching pressure pump. The quenching circulating pipe 511 also communicates with the circulating collection tank 512. The quenching pressure pump controls the spray speed and flow of the cooling liquid. The quenching liquid nozzle 513 aims at a deformed portion of the sheet to perform surface quenching. The quenching circulating liquid tank 512 collects the sprayed cooling liquid to realize the reuse of the cooling liquid.
Since the heating and quenching processes cause ash deformation error, a correcting and positioning roller 2 is needed for correction. The correcting and positioning roller 2 is located in front of the quenching device 5. There are multiple stages of correcting and positioning rollers 2, and the multiple stages of correcting and positioning rollers are arranged in order. Each stage of correcting and positioning roller is composed of a correcting and positioning top roller and a correcting and positioning down roller, which match each other. The deformed sheet enters into a quenching correction process after being heated and quenched. The correcting and positioning top roller and the correcting and positioning down roller correct to a precision/tolerance in compliance with a part design requirement to form a final part. The correcting and positioning roller rolls, and the final part moves forward to a blanking and positioning roller.
The blanking and positioning roller is located in front of the correcting and positioning roller 2. The blanking and positioning roller includes a blanking and positioning top roller 31 and a blanking and positioning down roller 32. The blanking and positioning down roller 32 is disposed directly below the blanking and positioning top roller 31, and the blanking and positioning top roller 31 and the blanking and positioning down roller 32 are jointly disposed at a discharge outlet of the device body. The final part is positioned by the blanking and positioning roller for a downstream automatic picking device to accurately grasp.
Further, FIGs. 1-3 show an arrangement method of the forming roller 1 and the correcting and positioning roller 2. There are seven forming rollers 1, sequentially, a first forming roller, a second forming roller, a third forming roller, a fourth forming roller, a fifth forming roller, a
2020100509 02 Apr 2020 sixth forming roller and a seventh forming roller. The first forming roller is composed of a first forming top roller 13 and a first forming down roller 14 which match each other. The second forming roller is composed of a second forming top roller 15 and a second forming down roller 16 which match each other. The third forming roller is composed of a third forming top roller 17 and a third forming down roller 18 which match each other. The fourth forming roller is composed of a fourth forming top roller 19 and a fourth forming down roller 110 which match each other. The fifth forming roller is composed of a fifth forming top roller 111 and a fifth forming down roller 112 which match each other. The sixth forming roller is composed of a sixth forming top roller 113 and a sixth forming down roller 114 which match each other. The seventh forming roller is composed of a seventh forming top roller 115 and a seventh forming down roller 116 which match each other.
As shown in FIG. 4, the first forming top roller 13, the second forming top roller 15, the third forming top roller 17, the fourth forming top roller 19, the fifth forming top roller 111, the sixth forming top roller 113 and the seventh forming top roller 115 are respectively provided with a top cutting face 116 having a different inclination.
The first forming down roller 14, the second forming down roller 16, the third forming down roller 18, the fifth forming down roller 112 and the seventh forming down roller 116 are respectively provided with a down cutting face 117, which is correspondingly engaged with the respective top cutting face 116.
There are four stages of correcting and positioning rollers 2, sequentially, a first-stage correcting and positioning roller, a second-stage correcting and positioning roller, a third-stage correcting and positioning roller and a fourth-stage correcting and positioning roller. The firststage correcting and positioning roller is composed of a first-stage correcting and positioning top roller 21 and a first-stage correcting and positioning down roller 22 which match each other. The second-stage correcting and positioning roller is composed of a second-stage correcting and positioning top roller 23 and a second-stage correcting and positioning down roller 24 which match each other. The third-stage correcting and positioning roller is composed of a third-stage correcting and positioning top roller 25 and a third-stage correcting and positioning down roller 26 which match each other. The fourth-stage correcting and positioning roller is composed of a fourth-stage correcting and positioning top roller 27 and a fourth-stage correcting and positioning down roller 28 which match each other.
The forming rollers and the correcting and positioning rollers are not limited to the abovementioned arrangement method, and can be provided with different shapes or different angles of upper and lower cutting faces, according to the design requirements of specific parts such as basin-shaped parts and U-shaped parts. The forming rollers and the correcting and positioning
2020100509 02 Apr 2020 rollers can be specifically arranged in industry according to the design requirements of specific parts.
The present invention further discloses a processing method of the device for roll-forming a steel sheet by hot forming, where the processing method is a continuous production process, specifically as follows:
the raw sheet 6 is shown in FIG. 8; the initial positioning top roller 11 and the initial positioning down roller 12 position and clamp the raw sheet 6; the initial positioning top roller 11 and the initial positioning down roller 12 roll to move the raw sheet 6 forward;
the raw sheet 6 moves to the forming roller 1, and the shape of the raw sheet 6 is changed by pressing by the forming top roller and the forming down roller; at this time, the raw sheet 6 is bent and a bottom fillet radius thereof is reduced; the forming of the raw sheet 6 is completed by the pressing of multiple forming rollers;
during the forming process of the raw sheet 6, the raw sheet 6 is gradually deformed into a deformed sheet; the deformed sheet continuously passes through a steel sheet moving channel 46, and is rapidly heated by the heating device 3; the heating device 3 can have various forms such as an induction heating coil 311 as shown in FIG. 5, a flame heater 312 as shown in FIG. 6, a microwave heater and an electric heater; the control box 4 controls various parameters such as heating current, heating power, heating temperature and heating time; the control box can be omitted if an electric heater is used;
after being heated, the deformed sheet continues to move forward under the action of each roller, and enters the quenching device 5 to quench a deformed surface thereof; the quenching is performed by spraying with a cooling liquid or a low temperature gas; if a cooling liquid is used, the surface quenching circulating system 51 shown in FIG. 6 is used; the quenching pressure pump box 514 controls the spray speed and flow of the cooling liquid; the quenching liquid nozzle 513 sprays the cooling liquid onto the surface of the part to realize quenching; after quenching, the cooling liquid falls into the quenching circulating liquid tank 512 to be collected for the next quenching process; the low-temperature gas is sprayed roughly the same as the cooling liquid;
the deformed sheet enters into a quenching correction process after heating and surface quenching; during the quenching correction process, the part continues to move forward under the action of each roller, and enters the correcting and positioning roller 2 to correct an unacceptable deformation occurring in the heating and quenching process; after the correction, the part is positioned by the blanking and positioning top roller 31 and the blanking and positioning down roller 32 for a downstream automatic picking device to accurately grasp.
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2020100509 02 Apr 2020
The processing method disclosed by the present invention is further described below with an example shown in FIG. 1.
The raw sheet 6 is a 22MnB5 hot-formed steel sheet with a thickness of 2.0 mm. As shown in FIG. 4, each forming top roller is provided with a top cutting face 116 having a different inclination, and each forming down roller is provided with a down cutting face 117 engaged with the matching top cutting face 116 thereof. The deformed sheet 7 is shown in FIG. 9, and the part to undergo the quenching correction process is a to-be-corrected sheet 8 shown in FIG. 10 and FIG. 11. The processing method is specifically:
The initial positioning top roller 11 and the initial positioning down roller 12 position and clamp the raw sheet 6, and the initial positioning top roller 11 and the initial positioning down roller 12 roll to move the raw sheet 6 forward. The raw sheet 6 moves to the first forming top roller 13 and the first forming down roller 14, and the first forming top roller 13 and the first forming down roller 14 press the raw sheet 6 to change the shape of the raw sheet 6. The raw sheet 6 is bent upward by an a degree along a bending direction, and after the bending, the top and down cutting faces of the first forming top roller 13 and the first forming down roller 14 are bonded. In the same way, the second forming top roller 15 and the second forming down roller 16, the third forming top roller 17 and the third forming down roller 18, the fourth forming top roller 19 and the fourth forming down roller 110, the fifth forming top roller 111 and the fifth forming down roller 112, and the sixth forming top roller 113 and the sixth forming down roller 114 sequentially complete α-degree bending and reduction of the bottom fillet radius of the deformed sheet 7 in the rolling process. The seventh forming top roller 115 and the seventh forming down roller 116 complete β-degree bending and reduction of the bottom fillet radius of the deformed sheet 7 in the rolling process. The above operations complete the deformation of the raw sheet 6. The bending angles a and β are set according to specific performance requirements of the part.
During the forming process, the raw sheet 6 is deformed into a deformed sheet 7. The deformed sheet is gradually moved at a certain speed under the driving of each roller, and passes through the heating device to be heated by the heating device 3. The heating device can have various forms such as an induction heating coil, a flame heater, a microwave heater and an electric heater. When the heating device 3 is an induction heating coil, the control box 4 is an induction heating control box. Under the action of the induction heating control box, the induction heating current is controlled to 50 A, the power is 5000 W, and the sheet is quickly heated to 800-880°C. The heating temperature is set according to the specific performance requirements of the part. The heating methods of the flame heater, the microwave heater and the electric heater are all similar. If an electric heater is used, the control box 4 may not be used.
2020100509 02 Apr 2020
After being heated, the deformed sheet 7 continues to move forward under the action of the roller, and enters the quenching device 5, which quenches with a cooling liquid or a low temperature gas. If a cooling liquid is used, the surface quenching water circulating system 51 as shown in FIG. 7 is used. After receiving an instruction, the surface quenching pressure pump box 54 provides pressure to the surface quenching liquid nozzle 53 and sprays the cooling liquid onto the surface of the part. The spray speed and flow of the cooling liquid are set and adjusted according to a quenching thickness of the part. Different speeds and flows will result in different quenching depths in the thickness direction of the part, which will further result in different overall performance. When a low-temperature gas is used, the working process is roughly similar.
During the rolling process, the deformed sheet 7 is heated and surface-quenched to become a part (a to-be-corrected part 9 shown in FIGs. 10 and 11) to undergo a quenching correction process. Since the heating and quenching processes cause a deformation, the part needs to be corrected to achieve product design accuracy. The correction is divided into four steps. The firststage correcting and positioning top roller 21 and the first-stage correcting and positioning down roller 22 correct the to-be-corrected part 9 to control a tolerance thereof between -2 mm and 2 mm. The second-stage correcting and positioning top roller 23 and the second-stage correcting and positioning down roller 24 control the part tolerance between -1.5 mm and 1.5 mm. The third-stage correcting and positioning top roller 25 and the third-stage correcting and positioning down roller 26 control the part tolerance between -1 mm and 1 mm. The fourth-stage correcting and positioning top roller 27 and the fourth-stage correcting and positioning down roller 28 make the part tolerance meet the design requirements. The control range of the part tolerance is set according to the specific performance requirements of the part.
After the correction of the to-be-corrected part 9 is completed, the part passes through the blanking and positioning top roller 31 and the blanking and positioning down roller 32 to be positioned for a downstream automatic picking device to accurately grasp.
This processing method achieves the performance gradient of the part in the thickness direction. For a part with a thickness of 2 mm, the surface is quenched after heating, but the interior is not quenched. Therefore, the performance of the quenched portion and the unquenched portion in the thickness direction is different. This processing method guarantees the strength and rigidity of the quenched portion and the good toughness of the unquenched portion, and improves the overall performance of the part.
It should be noted that the above described examples are not intended to limit the present invention, and the present invention is not limited thereto. Changes, modifications, additions or
2020100509 02 Apr 2020 replacements made by those skilled in the art based on the technical solutions of the present invention should fall within the protection scope of the present invention.
Claims (5)
1. A device for roll-forming a steel sheet by hot forming, comprising a device body, wherein the device body is provided with an initial positioning roller, a forming roller (1), a heating device (3), a control box (4), a quenching device (5), a correcting and positioning roller (2) and a blanking and positioning roller in this order;
the initial positioning roller comprises an initial positioning top roller (11) and an initial positioning down roller (12); the initial positioning down roller (12) is disposed directly below the initial positioning top roller (11), and the initial positioning down roller (12) and the initial positioning top roller (11) are jointly disposed at a feed inlet of the device body; a raw sheet (6) is positioned and clamped by the initial positioning roller; the initial positioning roller rolls to drive the raw sheet (6) to move forward to the forming roller (1);
the forming roller (1) is located in front of the initial positioning roller; there are multiple forming rollers (1), and the multiple forming rollers are arranged in order; each forming roller is composed of a forming top roller and a forming down roller, which match each other; the forming top roller and the forming down roller press and deform the raw sheet (6), and move the raw sheet continuously to the heating device (3) during a forming process;
the heating device (3) is located in front of the forming roller (1), and the operation of the heating device (3) is controlled by the control box (4); the control box (4) is located in front of the forming roller (1), and comprises a box body (41); a side wall of the box body (41) is provided with a control screen (43), a power supply control button (44) and a power control button (45); the heating device (3) is fixedly installed on a lower part of the box body (1); the heating device (3) is used to rapidly heat the raw sheet (6) at a high temperature when the deformed sheet passes through the heating device (3);
the quenching device (5) is located in front of the control box (4), and the quenching device (5) rapidly quenches the deformed sheet heated at a high temperature;
the correcting and positioning roller (2) is located in front of the quenching device (5); there are multiple stages of correcting and positioning rollers (2), and the multiple stages of correcting and positioning rollers are arranged in order; each stage of correcting and positioning roller is composed of a correcting and positioning top roller and a correcting and positioning down roller, which match each other; the deformed sheet enters into a quenching correction process after being heated and quenched, and a final part is formed through the correction of the correcting and positioning top roller and correcting and positioning down roller; the correcting and positioning roller rolls to move the final part forward to a blanking and positioning roller;
2020100509 02 Apr 2020 the blanking and positioning roller is located in front of the correcting and positioning roller (2); the blanking and positioning roller comprises a blanking and positioning top roller (31) and a blanking and positioning down roller (32); the blanking and positioning down roller (32) is disposed directly below the blanking and positioning top roller (31), and the blanking and positioning top roller (31) and the blanking and positioning down roller (32) are jointly disposed at a discharge outlet of the device body; the final part is positioned by the blanking and positioning roller for a downstream automatic picking device to accurately grasp.
2. The device for roll-forming a steel sheet by hot forming according to claim 1, wherein there are seven forming rollers (1), sequentially, a first forming roller, a second forming roller, a third forming roller, a fourth forming roller, a fifth forming roller, a sixth forming roller and a seventh forming roller; the first forming roller is composed of a first forming top roller (13) and a first forming down roller (14) which match each other; the second forming roller is composed of a second forming top roller (15) and a second forming down roller (16) which match each other; the third forming roller is composed of a third forming top roller (17) and a third forming down roller (18) which match each other; the fourth forming roller is composed of a fourth forming top roller (19) and a fourth forming down roller (110) which match each other; the fifth forming roller is composed of a fifth forming top roller (111) and a fifth forming down roller (112) which match each other; the sixth forming roller is composed of a sixth forming top roller (113) and a sixth forming down roller (114) which match each other; the seventh forming roller is composed of a seventh forming top roller (115) and a seventh forming down roller (116) which match each other;
the first forming top roller (13), the second forming top roller (15), the third forming top roller (17), the fourth forming top roller (19), the fifth forming top roller (111), the sixth forming top roller (113) and the seventh forming top roller (115) are respectively provided with a top cutting face (116) having a different inclination;
the first forming down roller (14), the second forming down roller (16), the third forming down roller (18), the fifth forming down roller (112) and the seventh forming down roller (116) are respectively provided with a down cutting face (117), which is correspondingly engaged with the respective top cutting face (116, preferably, wherein the heating device (3) is any one of an induction heating coil (311), a flame heater (312), a microwave heater and an electric heater.
3. The device for roll-forming a steel sheet by hot forming according to claim 2, wherein the quenching device (5) is a surface quenching circulating system (51); the surface quenching circulating system (51) comprises a quenching circulating pipe (511), a quenching pressure pump box (514), a circulating collection tank (512) and a quenching liquid nozzle (513); a quenching pressure pump is disposed in the quenching pressure pump box (514); the quenching
2020100509 02 Apr 2020 circulating pipe (511) communicates with the quenching liquid nozzle (513) through the quenching pressure pump; the quenching circulating pipe (511) also communicates with the circulating collection tank (512).
4. The device for roll-forming a steel sheet by hot forming according to claim 3, wherein there are four stages of correcting and positioning rollers (2), sequentially, a first-stage correcting and positioning roller, a second-stage correcting and positioning roller, a third-stage correcting and positioning roller and a fourth-stage correcting and positioning roller; the firststage correcting and positioning roller is composed of a first-stage correcting and positioning top roller (21) and a first-stage correcting and positioning down roller (22) which match each other; the second-stage correcting and positioning roller is composed of a second-stage correcting and positioning top roller (23) and a second-stage correcting and positioning down roller (24) which match each other; the third-stage correcting and positioning roller is composed of a third-stage correcting and positioning top roller (25) and a third-stage correcting and positioning down roller (26) which match each other; the fourth-stage correcting and positioning roller is composed of a fourth-stage correcting and positioning top roller (27) and a fourth-stage correcting and positioning down roller (28) which match each other;
wherein when the quenching device is a surface quenching circulating system (51), a cooling liquid is used for quenching; the quenching pressure pump in the quenching pressure pump box (514) controls the spray speed and flow of the cooling liquid; the quenching liquid nozzle (513) sprays the cooling liquid onto the surface of the part to realize quenching; after quenching, the cooling liquid falls into the quenching circulating liquid tank (512) to be collected for the next quenching process.
5. A processing method of the device for roll-forming a steel sheet by hot forming according to any one of claims 1 to 4, wherein the processing method is a continuous production process, specifically as follows:
the initial positioning top roller (11) and the initial positioning down roller (12) position and clamp the raw sheet (6), and the initial positioning top roller (11) and the initial positioning down roller (12) roll to move the raw sheet (6) forward;
the raw sheet (6) moves to the forming roller (1), and the shape of the raw sheet (6) is changed by pressing by the forming top roller and the forming down roller; at this time, the raw sheet (6) is bent and a bottom fillet radius thereof is reduced; the forming of the raw sheet (6) is completed by the pressing of multiple forming rollers;
during the forming process of the raw sheet (6), the raw sheet (6) is gradually deformed into a deformed sheet; the deformed sheet continuously passes through the heating device (3), and is
2020100509 02 Apr 2020 rapidly heated by the heating device (3); after being heated, the deformed sheet continues to move forward under the action of each roller, and enters the quenching device (5) to quench a deformed surface thereof;
the deformed sheet enters into a quenching correction process after heating and surface quenching; during the quenching correction process, the part continues to move forward under the action of each roller, and enters the correcting and positioning roller (2) to correct an unacceptable deformation occurring in the heating and quenching process; after the correction, the part is positioned by the blanking and positioning top roller (31) and the blanking and positioning down roller (32) for a downstream automatic picking device to accurately grasp.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910268805.7A CN109794506B (en) | 2019-04-04 | 2019-04-04 | Roll forming device and method for hot formed steel plate |
| CN201910268805.7 | 2019-04-04 |
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| AU2020100509A4 true AU2020100509A4 (en) | 2020-05-28 |
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| CN113146272A (en) * | 2021-04-19 | 2021-07-23 | 曹喜国 | Right-angle curtain wall steel section, door and window steel section rolling device and machining method thereof |
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