CN116551331A - Japanese-shaped cold-bent profile and roll bending forming method thereof - Google Patents
Japanese-shaped cold-bent profile and roll bending forming method thereof Download PDFInfo
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- CN116551331A CN116551331A CN202310664726.4A CN202310664726A CN116551331A CN 116551331 A CN116551331 A CN 116551331A CN 202310664726 A CN202310664726 A CN 202310664726A CN 116551331 A CN116551331 A CN 116551331A
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- 238000013000 roll bending Methods 0.000 title claims abstract description 106
- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000000463 material Substances 0.000 claims abstract description 26
- 238000003466 welding Methods 0.000 claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 15
- 238000005452 bending Methods 0.000 claims abstract description 15
- 239000010959 steel Substances 0.000 claims abstract description 15
- 238000007493 shaping process Methods 0.000 claims description 8
- 229910000797 Ultra-high-strength steel Inorganic materials 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 description 11
- 230000007547 defect Effects 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 6
- 238000009826 distribution Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16S—CONSTRUCTIONAL ELEMENTS IN GENERAL; STRUCTURES BUILT-UP FROM SUCH ELEMENTS, IN GENERAL
- F16S1/00—Sheets, panels, or other members of similar proportions; Constructions comprising assemblies of such members
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Abstract
The invention discloses a Chinese character 'ri' -shaped cold-formed section bar and a roll bending forming method thereof. Wherein a sun style of calligraphy cold-formed section bar includes: a first member including a first plate-like structure, and a hollow portion formed by the first plate-like structure connected end to end; and a second member having a second plate-like structure, the second plate-like structure being located inside the first member and dividing the hollow portion into a first hollow portion and a second hollow portion. The roll bending forming method of the cold bending sectional material in the shape of Chinese character 'ri' comprises the steps of firstly roll bending a plate to enable the cross section of the plate to be in a structure similar to the shape of a Chinese character 'b', then welding, and then roll bending the vertical edge of the structure similar to the shape of the Chinese character 'b' to enable the vertical edge of the structure similar to the shape of an inverted U, and welding after forming the cross section plate similar to the structure similar to the shape of the Chinese character 'ri'; the invention has the advantages of high efficiency, material saving, energy saving, high product precision and the like, and provides a new method for stably realizing the high-precision roll bending forming of the cold-formed steel with the complex cross section in the shape of Chinese character 'ri'.
Description
Technical Field
The invention relates to the technical field of profile forming, in particular to a Chinese character 'ri' -shaped cold-formed profile and a roll bending forming method thereof.
Background
The roll bending section steel is an economic section steel with very wide application. The cross section structure is reasonable (usually designed according to the use requirement), the variety and specification are various, the geometric dimension is accurate, and the use requirements of modern society on material weight reduction, cross section shape rationalization and functionalization are met, so that the material is almost used in all fields of daily life of people. With the continuous progress of technology and the continuous improvement of the requirements of users on products, the cold-formed steel also develops towards a more complex and more precise direction. However, the roll bending forming process is complex, the influence factors are numerous, and the deformation rule of the roll bending forming process of the plate strip material such as high-strength steel or ultra-high-strength steel for light weight is not completely mastered by people, so that the hole pattern design of the roll bending type steel product, especially the ' Chinese character ' ri ' -shaped complex section type steel product, also mainly depends on the production experience of a designer. Compared with the common channel steel, the section shape of the Chinese character 'ri' shaped complex section steel is complex, generally asymmetric, has serious non-uniform deformation, has large forming difficulty and obviously increases the number of bending angles compared with the common channel steel. The bending process is one of key technologies in the roll bending forming process of the Chinese character 'ri' shaped complex section steel, and the forming process of the bending angle and reasonable distribution of the deformation angle influence the forming quality of the final product.
For the section bar with the structure of Chinese character 'ri', two traditional production methods exist, wherein the first method is as follows: (1) Processing two U-shaped sections through roll bending equipment; (2) Two U-shaped channels were welded using pre-cut rectangular plates, as shown in FIG. 1. The second method is as follows: (1) Processing a 'mouth' -shaped section and a 'U' -shaped section by using roll bending equipment; (2) welding the two parts, as shown in FIG. 2. Besides the difficulty of processing the workpiece, the two forming methods also need to repeatedly weld the joint in the process of producing the workpiece so as to meet the use requirement of the integrity of the section bar, and the welding technology has additional influence on the quality of the workpiece and has higher dependence on the welding technology.
Therefore, a structure of a solar-type cold-formed profile and a production method thereof are needed to reduce welding spots, improve the material utilization rate and the production efficiency while ensuring the quality, and more widely expand the application range.
Disclosure of Invention
The invention aims to provide a solar-shaped cold-bent section bar and a roll bending forming method thereof, which are used for solving the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme: a cold-formed section bar shaped like Chinese character 'ri' and a roll bending forming method thereof.
Wherein, a day word cold-formed section bar includes: a first member including a first plate-like structure, and a hollow portion formed by the first plate-like structure connected end to end; and a second member having a second plate-like structure, the second plate-like structure being located inside the first member and dividing the hollow portion into a first hollow portion and a second hollow portion.
Preferably, the first end of the first plate-shaped structure and the first end of the second plate-shaped structure are integrally formed, the second end of the first plate-shaped structure is connected with the first end of the second plate-shaped structure, and the second end of the second plate-shaped structure is connected with the inner wall of the hollow part.
Preferably, a first welding part is formed at the connection part of the second end of the first plate-shaped structure and the first end of the second plate-shaped structure, and a second welding part is formed at the connection part of the second end of the second plate-shaped structure and the inner wall of the hollow part; the first hollow portion is close to the first end of the first plate-shaped structure, the second hollow portion is close to the second end of the first plate-shaped structure, the first welding portion is located outside the hollow portion, and the second welding portion is located inside the second hollow portion.
The roll bending forming method of the Chinese character 'ri' -shaped cold-formed section bar comprises the following steps of:
s1, preparing a plate;
s2, rolling the plate to enable the section of the plate to be in a similar b-shaped structure;
s3, performing primary welding, namely performing inner weld welding on the sectional material with the structure like the shape of the B;
s4, rolling the vertical edge of the structure similar to the shape of the Chinese character 'b' to enable the vertical edge of the structure similar to the shape of the Chinese character 'b' to be in a structure similar to the shape of an inverted U, so as to form a section plate material similar to the structure similar to the shape of the Chinese character 'ri';
s5, performing secondary welding, namely performing external welding on the section bar with the structure like the Chinese character 'ri'.
The roller bending forming method of the Chinese character 'ri' shaped cold-formed section bar can reduce welding lines of the section bar and process steps of the section bar, and the plate can be integrally formed into the Chinese character 'ri' shaped section bar, so that the stability is higher and the durability is stronger.
Preferably, the step S2 specifically includes:
1) Sequentially dividing the plate into an area A, an area B, an area C and an area D from one end of the plate to the other end of the plate;
2) Taking the area B as a web, bending the area A for the first time, wherein the roll bending angle is a, and the angle a is smaller than the angle required to be formed in the area A;
3) The roll bending angles of the C area and the D area are angles required by forming;
4) The secondary roll bending area A has an angle a 1 Angle a and angle a 1 The sum is the angle required to be formed in the area A.
Considering the space problem when the plates in the C area and the D area are bent, namely the sizes of the C area and the D area are smaller, and the finally formed section is a closed contour, if the A area is directly formed to the angle required to be formed, along with the multi-pass roll bending forming of the plates in the C area and the D area, the contour of the section of the plates tends to be closed, the contour is blocked by the plates in the A area and the B area, and the forming die in the C area can not extend into the closed contour at last, namely the vertical section shape of two adjacent walls can not be formed, so that the first roll bending is performed on the A area, the angle of the first roll bending is smaller than the angle required to be formed in the A area, and the forming of the Chinese character 'ri' -shaped section is facilitated.
Preferably, the roll bending step of the areas C and D in the step S2 includes:
firstly, a first roll bending area D is formed, the roll bending angle is D, and the angle D is smaller than the angle required to be formed in the area D;
then, a roll bending area C is formed, and the roll bending angle is the angle required to be formed in the area C;
thenA second roll bending region D, wherein the angle of the second roll bending region D is D 1 Angle d and angle d 1 The sum is the angle required to be formed in the region D.
Preferably, the step S4 includes:
1) Dividing the vertical edges outside the closed contour in the b-shaped structure into an E area, an F area and a G area sequentially from the end face close to the plate to the end face far from the plate;
2) Roll bending E area and F area, roll bending angle of E area and F area is the angle that the shaping needs.
Preferably, each roll bending forming is formed by a plurality of passes, so that the shaping speed can be reduced as much as possible, and defects of severe plastic deformation and uneven distribution of the plate caused by overhigh shaping speed, such as reduced surface quality of the plate, uneven or wavy edges and the like are avoided;
the maximum longitudinal strain value m of each pass of the sheet material is satisfied with the yield limit n of the sheet material:
(1-10％)*n≤m≤(1+10％)*n；
so as to avoid the occurrence of side wave quality defects in the forming process, namely wave-shaped folds at the edge of the plate;
longitudinal strain value m applied to two ends of plate End face And the maximum longitudinal strain value m:
m end face ≤m*90％；
So as to avoid the phenomenon of deflection of bending points in the forming process.
Preferably, the plate is a lightweight high-strength steel having a tensile strength of not less than 540MPa or an ultra-high-strength steel having a yield strength of more than 1380 MPa.
Preferably, the thickness of the plate is 2-10 mm.
Compared with the prior art, the invention has the following beneficial effects: the cold-formed sectional material in the shape of the Chinese character 'ri' has the advantages of higher stability, stronger durability and the like; the roll bending forming method of the Chinese character 'ri' shaped cold-formed section bar has the advantages of high efficiency, material saving, energy saving, high product precision and the like, can well solve the problems that datum points are easy to deviate and side wave quality defects are easy to occur in the forming process of Chinese character 'ri' shaped cold-formed section bar, and provides a new method for stably realizing high-precision roll bending forming of Chinese character 'ri' shaped cold-formed section bar in batches.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a first conventional structure of the present invention;
FIG. 2 is a second conventional structure of the present invention;
FIG. 3 is a structure of a solar-type cold-formed profile of the present invention;
FIG. 4 is a schematic flow chart of a roll bending forming method of a solar-type cold-bent profile of the invention;
FIG. 5 is a flow chart of the shaping of a medium material according to an embodiment of the present invention;
FIG. 6 is a schematic illustration of a multi-pass roll bend in an embodiment of the present invention;
FIG. 7 is a photograph of a solar-type cold-formed profile of example 1 of the present invention;
in the figure:
a first member 1, a first plate-like structure 11, a first hollow portion 12, a second hollow portion 13;
a second member 2, a second plate-like structure 21;
a first welded part 3;
a second weld 4.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 3, the present invention provides a solar-type cold-formed profile, comprising: the first component 1, the first component 1 comprises a first plate-shaped structure 11 and a hollow part formed by connecting the first plate-shaped structure 11 end to end; the second member 2, the second member 2 is a second plate-like structure 21, and the second plate-like structure 21 is located inside the first member 1 and divides the hollow into a first hollow portion 12 and a second hollow portion 13.
The first end of the first plate-shaped structure 11 and the first end of the second plate-shaped structure 21 are integrally formed, the second end of the first plate-shaped structure 11 is connected with the first end of the second plate-shaped structure 21, and the second end of the second plate-shaped structure 21 is connected with the inner wall of the hollow part.
A first welding part 3 is formed at the connection part of the second end of the first plate-shaped structure 11 and the first end of the second plate-shaped structure 21, and a second welding part 4 is formed at the connection part of the second end of the second plate-shaped structure 21 and the inner wall of the hollow part; the first hollow 12 is close to the first end of the first plate-like structure 11, the second hollow 13 is close to the second end of the first plate-like structure 11, the first welded part 3 is located outside the hollow, and the second welded part 4 is located inside the second hollow 13.
Example 1: based on the cold-bent sectional material in the shape of Chinese character 'ri', the embodiment selects high-strength steel with the thickness of 10mm and the tensile strength of 540MPa, and carries out roll bending forming on the sectional material to form the sectional material in the shape of Chinese character 'ri';
specifically, taking the order of fig. 4 to 5 as an example, firstly, the section is divided into an area a, an area B, an area C and an area D in sequence from left to right, wherein the three areas a, C and D are used as bending parts, displacement is required in three directions XYZ, the area B is used as a web, and displacement is required only in the forming direction.
Because the sizes of the area C and the area D are smaller, and the final forming section is a closed contour, if the area A is directly rolled to 90 degrees, the contour of the section tends to be closed along with the multi-pass bending forming of the section of the area C and the section of the area D, the section of the section is blocked by the section of the area A and the section of the area B, and the forming die of the area C cannot extend into the closed contour finally, so that the vertical section shape of two adjacent walls cannot be formed.
Therefore, the first roll bending is performed on the area A to make the included angle between the area A and the horizontal direction be 60 degrees, wherein, referring to FIG. 6, the forming angle of each roll bending is set to be 6 degrees, and 10 passes are totally performed;
then, performing first roll bending on the region D to enable an included angle between the region D and the horizontal direction to be 60 degrees, and referring to FIG. 6, setting a forming angle of each pass to be 6 degrees, wherein 10 passes are performed in total; performing roll bending on the region C until the included angle between the region C and the horizontal direction is 90 degrees, wherein the roll bending is set to form an angle of 10 degrees for each pass, and 9 passes are totally performed; performing secondary roll bending on the area D to enable the area D to continue roll bending for 30 degrees, forming the area D into a required angle, and setting the roll bending at a forming angle of 5 degrees for 6 passes in total in order to avoid defects of severe plastic deformation and uneven distribution of the plate caused by overhigh shaping speed, such as reduced surface quality of the plate, uneven surface or wavy edges of the plate; the roll bending of the C area and the D area is finished, and the C area and the D area and the C area and the B area are positioned at vertical positions;
then, carrying out second roll bending on the area A, enabling the area A to continue roll bending for 30 degrees, forming into a structure vertical to a horizontal plane, setting the forming angle of each pass to be 5 degrees, and carrying out 6 passes in total;
the section bar passes through each roller from the 1 st pass, and finally the section bar with the section similar to the shape of the b is formed by more than 41 st pass, so that the section bar with the section similar to the shape of the b can be welded for the first time, namely, the inner weld joint is welded;
finally, after the section bar is formed into the b-shaped section, the standing edge part where the A area is located is required to be continuously bent, specifically, the standing edge part where the A area is located is divided into an E area, an F area and a G area, roll bending is carried out on the roll bending E area and the F area, 10 pass roll bending forming is arranged at each position, the forming angle of each pass is 9 degrees, and finally the section plate with the 'Japanese' -shaped structure shown in fig. 7 is formed.
Example 2: based on the cold-bent sectional material in the shape of Chinese character 'ri', the embodiment selects high-strength steel with the thickness of 5mm and the tensile strength of 600MPa, and carries out roll bending forming on the sectional material to form the sectional material in the shape of Chinese character 'ri';
specifically, taking the order of fig. 4 to 5 as an example, firstly, the section is divided into an area a, an area B, an area C and an area D in sequence from left to right, wherein the three areas a, C and D are used as bending parts, displacement is required in three directions XYZ, the area B is used as a web, and displacement is required only in the forming direction.
Because the sizes of the area C and the area D are smaller, and the final forming section is a closed contour, if the area A is directly rolled to 90 degrees, the contour of the section tends to be closed along with the multi-pass bending forming of the section of the area C and the section of the area D, the section of the section is blocked by the section of the area A and the section of the area B, and the forming die of the area C cannot extend into the closed contour finally, so that the vertical section shape of two adjacent walls cannot be formed.
Therefore, the first roll bending is performed on the area A to make the included angle between the area A and the horizontal direction be 75 degrees, wherein, referring to FIG. 6, the forming angle of each roll bending is set to be 15 degrees, and 5 passes are totally performed;
then, performing a first roll bending on the region D to enable the included angle between the region D and the horizontal direction to be 75 degrees, and referring to FIG. 6, setting the forming angle of each pass to be 15 degrees, wherein the total time of the roll bending is 5 passes; performing roll bending on the region C until the included angle between the region C and the horizontal direction is 90 degrees, wherein the roll bending is set to form an angle of 15 degrees for each pass, and 6 passes are totally performed; performing secondary roll bending on the area D to enable the area D to continue roll bending for 15 degrees, forming the area D into a required angle, and setting the roll bending at a forming angle of 5 degrees for each pass in total to avoid defects of plate surface quality reduction, uneven or wavy edges and the like caused by severe plastic deformation and uneven distribution of the plate due to overhigh shaping speed; the roll bending of the C area and the D area is finished, and the C area and the D area and the C area and the B area are positioned at vertical positions;
then, carrying out secondary roll bending on the area A, enabling the area A to continue roll bending for 15 degrees, forming the area A into a structure vertical to a horizontal plane, and simultaneously setting the secondary roll bending of the area A to be 5 degrees in a forming angle of each pass for ensuring the quality of the section bar, wherein the total time of the secondary roll bending is 3 passes;
the section bar passes through each roller from the 1 st pass, and finally the section bar with the section similar to the shape of the b is formed by more than 20 th pass, so that the section bar with the section similar to the shape of the b can be welded for the first time, namely, the inner weld joint is welded;
finally, after the section bar is formed into the b-shaped section, the standing edge part where the A area is located is required to be continuously bent, specifically, the standing edge part where the A area is located is divided into an E area, an F area and a G area, roll bending is carried out on the roll bending E area and the F area, 6-pass roll bending forming is arranged at each position, the forming angle of each pass is 15 degrees, and finally the section plate with the 'Japanese' -shaped structure shown in fig. 7 is formed.
Example 3: based on the cold-bent sectional material in the shape of Chinese character 'ri', the embodiment selects the ultra-high-strength steel with the thickness of 2mm and the yield strength of 1380MPa, and carries out roll bending forming on the sectional material to form the sectional material in the shape of Chinese character 'ri';
specifically, taking the order of fig. 4 to 5 as an example, firstly, the section is divided into an area a, an area B, an area C and an area D in sequence from left to right, wherein the three areas a, C and D are used as bending parts, displacement is required in three directions XYZ, the area B is used as a web, and displacement is required only in the forming direction.
Because the sizes of the area C and the area D are smaller, and the final forming section is a closed contour, if the area A is directly rolled to 90 degrees, the contour of the section tends to be closed along with the multi-pass bending forming of the section of the area C and the section of the area D, the section of the section is blocked by the section of the area A and the section of the area B, and the forming die of the area C cannot extend into the closed contour finally, so that the vertical section shape of two adjacent walls cannot be formed.
Therefore, the first roll bending is performed on the area A to make the included angle between the area A and the horizontal direction be 75 degrees, wherein, referring to FIG. 6, the forming angle of each roll bending is set to be 5 degrees, and 15 passes are totally performed;
then, performing a first roll bending on the region D to enable the included angle between the region D and the horizontal direction to be 75 degrees, and referring to FIG. 6, setting the forming angle of each pass to be 5 degrees, wherein 15 passes are totally performed; performing roll bending on the region C until the included angle between the region C and the horizontal direction is 90 degrees, wherein the roll bending is set to form an angle of 6 degrees for each pass, and 15 passes are totally performed; performing secondary roll bending on the area D to enable the area D to continue roll bending for 15 degrees, forming the area D into a required angle, and setting the roll bending at a forming angle of 3 degrees for 5 passes in total in order to avoid defects of severe plastic deformation and uneven distribution of the plate caused by overhigh shaping speed, such as reduced surface quality of the plate, uneven surface or wavy edges of the plate; the roll bending of the C area and the D area is finished, and the C area and the D area and the C area and the B area are positioned at vertical positions;
then, carrying out secondary roll bending on the area A, enabling the area A to continue roll bending for 15 degrees, forming the area A into a structure vertical to a horizontal plane, and simultaneously setting the secondary roll bending of the area A to be 3 degrees in a forming angle of each pass for ensuring the quality of the section bar, wherein the total time of the secondary roll bending is 5 passes;
the section bar passes through each roller from the 1 st pass, and finally the section bar with the section similar to the shape of the b is formed by more than 55 th pass, so that the section bar with the section similar to the shape of the b can be welded for the first time, namely, the inner weld joint is welded;
finally, after the section bar is formed into the b-shaped section, the standing edge part where the A area is located is required to be continuously bent, specifically, the standing edge part where the A area is located is divided into an E area, an F area and a G area, roll bending is carried out on the roll bending E area and the F area, 15 pass roll bending forming is arranged at each roll bending E area and each pass forming angle is 6 degrees, and finally the section plate with the 'Japanese' -shaped structure shown in fig. 7 is formed.
It is noted that 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. Moreover, 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.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A solar-style cold-formed profile, comprising:
a first member including a first plate-like structure, and a hollow portion formed by the first plate-like structure connected end to end;
and a second member having a second plate-like structure, the second plate-like structure being located inside the first member and dividing the hollow portion into a first hollow portion and a second hollow portion.
2. A solar-style cold-rolled profile according to claim 1, characterized in that: the first end of the first plate-shaped structure and the first end of the second plate-shaped structure are integrally formed, the second end of the first plate-shaped structure is connected with the first end of the second plate-shaped structure, and the second end of the second plate-shaped structure is connected with the inner wall of the hollow part.
3. A solar-style cold-rolled profile according to claim 2, characterized in that: a first welding part is formed at the joint of the second end of the first plate-shaped structure and the first end of the second plate-shaped structure, and a second welding part is formed at the joint of the second end of the second plate-shaped structure and the inner wall of the hollow part;
the first hollow portion is close to the first end of the first plate-shaped structure, the second hollow portion is close to the second end of the first plate-shaped structure, the first welding portion is located outside the hollow portion, and the second welding portion is located inside the second hollow portion.
4. A roller bending forming method of a Chinese character 'ri' -shaped cold-formed section bar is characterized by comprising the following steps:
s1, preparing a plate;
s2, rolling the plate to make the section of the plate be in a similar b-shaped structure;
s3, welding for the first time;
s4, rolling the vertical edge of the similar-b-shaped structure to enable the vertical edge of the similar-b-shaped structure to be in an inverted U-shaped structure, so as to form a cross-section plate with a similar-Chinese-character-ri-shaped structure;
s5, welding for the second time.
5. The roll bending forming method of the solar-type cold-formed profile according to claim 4, wherein the step S2 specifically includes:
1) Sequentially dividing the plate into an area A, an area B, an area C and an area D from one end of the plate to the other end of the plate;
2) Taking the area B as a web, bending the area A for the first time, wherein the roll bending angle is a, and the angle a is smaller than the angle required to be formed in the area A;
3) The roll bending angles of the C area and the D area are angles required by forming;
4) The secondary roll bending area A has an angle a 1 Angle a and angle a 1 The sum is the angle required to be formed in the area A.
6. The roll bending forming method of the solar-type cold-formed profile according to claim 5, wherein the roll bending step of the C area and the D area in the step S2 comprises:
firstly, a first roll bending area D is formed, the roll bending angle is D, and the angle D is smaller than the angle required to be formed in the area D;
then, a roll bending area C is formed, and the roll bending angle is the angle required to be formed in the area C;
then, the second roll is bent to form a region D, and the angle of the second roll bending in the region D is D 1 Angle d and angle d 1 The sum is the angle required to be formed in the region D.
7. The roll bending forming method of a solar-type cold-formed profile according to claim 4, wherein the step S4 includes:
1) Dividing the vertical edges outside the closed outline in the b-shaped structure into an E area, an F area and a G area sequentially from the end face close to the plate to the end face far from the plate;
2) Roll bending E area and F area, roll bending angle of E area and F area is the angle that the shaping needs.
8. The roll bending forming method of the Chinese character 'ri' shaped cold-formed section bar according to any one of claims 5 to 7, wherein each roll bending forming is formed by a plurality of passes;
the maximum longitudinal strain value m of each pass of the sheet material is satisfied with the yield limit n of the sheet material:
(1-10％)*n≤m≤(1+10％)*n；
longitudinal strain value m applied to two ends of plate End face And the maximum longitudinal strain value m:
m end face ≤m*90％。
9. The roll bending forming method of a cold-formed sectional material in a shape of Chinese character 'ri' according to any one of claims 4 to 7, wherein the plate material is a high-strength steel for light weight with a tensile strength of not less than 540MPa or an ultra-high-strength steel with a yield strength of more than 1380 MPa.
10. A roll bending forming method of a solar-type cold-formed section bar according to any one of claims 4 to 7, wherein the thickness of the plate is 2 to 10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310664726.4A CN116551331A (en) | 2023-06-07 | 2023-06-07 | Japanese-shaped cold-bent profile and roll bending forming method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310664726.4A CN116551331A (en) | 2023-06-07 | 2023-06-07 | Japanese-shaped cold-bent profile and roll bending forming method thereof |
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| CN116551331A true CN116551331A (en) | 2023-08-08 |
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| CN202310664726.4A Pending CN116551331A (en) | 2023-06-07 | 2023-06-07 | Japanese-shaped cold-bent profile and roll bending forming method thereof |
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| CN (1) | CN116551331A (en) |
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