CN117340083A - Bending forming method of bending steel plate - Google Patents
Bending forming method of bending steel plate Download PDFInfo
- Publication number
- CN117340083A CN117340083A CN202311172676.4A CN202311172676A CN117340083A CN 117340083 A CN117340083 A CN 117340083A CN 202311172676 A CN202311172676 A CN 202311172676A CN 117340083 A CN117340083 A CN 117340083A
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- steel plate
- torsion
- bending
- pressing
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 126
- 239000010959 steel Substances 0.000 title claims abstract description 126
- 238000005452 bending Methods 0.000 title claims abstract description 109
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000003825 pressing Methods 0.000 claims abstract description 87
- 238000001514 detection method Methods 0.000 claims description 4
- 238000013003 hot bending Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000009987 spinning Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/14—Twisting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
A method for forming a bending steel plate includes the following steps: s1, determining the torsion degree of end surfaces at two ends of a standard torsion member in the length direction and the torsion degrees of a plurality of cross sections of the standard torsion member; s2, arranging pressing dies according to the positions of the end surfaces of the two ends of the standard bending member in the length direction and the positions of the cross sections of a plurality of standard bending members; and S3, correspondingly placing the initial steel plate on the pressing die, and sequentially pressing from one end surface in the length direction of the initial steel plate according to the determined torsion degree until the initial steel plate is finished. According to the bending forming method of the bending steel plate, the standard bending member is subjected to modeling treatment, the bending degree of the standard bending member is obtained, the initial steel plate is pressed according to the obtained bending degree, the production efficiency is high, and compared with the traditional hot bending forming method, the processing precision is higher.
Description
Technical Field
The invention relates to the technical field of steel structure processing, in particular to a bending forming method of a bending steel plate.
Background
In modern steel structural design, box type bending steel members are often used, in the manufacturing process of the bending steel members, steel plate bending forming of the bending steel members is a key step in the manufacturing process, the efficiency of steel plate bending forming is the basis for guaranteeing the follow-up procedures of the bending steel members, the traditional steel plate forming method is basically flame hot bending forming or multi-pass spinning forming, the problems of lower production efficiency exist in hot bending forming and multi-pass spinning forming, and in addition, the problem of material shrinkage is easily caused in hot bending forming, so that the processing accuracy of the box type bending steel members is affected.
Disclosure of Invention
Accordingly, the present invention is directed to a method for forming a bent steel sheet, which has high productivity and higher processing accuracy than conventional hot bending.
The invention provides a bending and twisting forming method of a bending and twisting steel plate, which comprises the following steps:
s1, determining the torsion degree of end surfaces at two ends of a standard torsion member in the length direction and the torsion degrees of a plurality of cross sections of the standard torsion member;
s2, arranging pressing dies according to the positions of the end surfaces of the two ends of the standard bending member in the length direction and the positions of the cross sections of a plurality of standard bending members;
and S3, correspondingly placing the initial steel plate on the pressing die, and sequentially pressing from one end surface in the length direction of the initial steel plate according to the determined torsion degree until the initial steel plate is finished.
In one embodiment, the step S1 of determining the torsion degree of the end surfaces at the two ends of the standard torsion member in the length direction and the torsion degrees of the cross sections of the standard torsion member further includes:
s101, modeling a standard bending member;
s102, establishing a coordinate system based on the established standard bending component model;
s103, marking a plurality of marking points on the standard bending member model, and determining the end surfaces of the two ends of the standard bending member in the length direction and the first coordinate positions of the cross section of the standard bending member at the positions of the marking points;
s104, determining the torsion degree of the cross section corresponding to the end face and the marking point according to the coordinate positions of the end face and the coordinate positions of the cross sections.
In an embodiment, the step S2 is to arrange a pressing mold according to the positions of the end surfaces of the two ends of the standard bending member in the length direction and the positions of the cross sections of the standard bending members, and further includes;
s201, unfolding the standard bending member model to obtain an unfolding torsion steel plate model;
s202, determining second coordinate positions of end faces at two ends of the expanded torsion steel plate in the length direction and a plurality of marking points;
and S203, laying the pressing die according to the second coordinate position.
In an embodiment, the step S203, laying out the pressing mold according to the second coordinate position, further includes:
s203a, arranging corresponding pressing molds according to second coordinate positions corresponding to two ends of the unfolding torsion steel plate model;
s203b, determining a second coordinate position of the marking point on the unfolding torsion steel plate model, and determining a pressing mold corresponding to the preset layout point according to the second coordinate position of the marking point, wherein a preset distance is reserved between the preset layout point and the corresponding second coordinate position of the marking point.
In an embodiment, the step S3 of placing the initial steel plate on the pressing mold correspondingly, and pressing the initial steel plate from one end surface in the length direction of the initial steel plate according to the determined torsion degree until the initial steel plate is finished, further includes:
s301, placing the end part of an initial steel plate on a corresponding pressing die, and placing the position, corresponding to the mark point on the unfolding torsion steel plate model, on the initial steel plate on the corresponding other pressing dies;
s302, selecting one end face in the length direction of the initial steel plate, and pressing according to the torsion degree of the corresponding end face on the standard torsion member;
s303, after the pressing is completed, selecting the position of the initial steel plate corresponding to the mark point adjacent to the end surface of the initial steel plate, and calculating the difference value between the torsion degree of the cross section of the initial steel plate corresponding to the adjacent mark point and the torsion degree of the selected end surface;
s304, pressing the positions of the initial steel plates corresponding to the adjacent marking points according to the difference values;
and S305, repeating the steps S303 and S304 until the pressing of the other end face in the length direction of the initial steel plate is completed.
In an embodiment, the initial steel plate is pressed to the corresponding torsion degree at each position in the following manner:
s3a, pressing according to a preset torsion degree or difference value;
s3b, unloading the pressing pressure after the pressing is completed;
s3c, measuring the torsion degree at the corresponding position to determine a rebound value;
s3d, pressing again according to the rebound value;
and S3e, repeating the steps S3b to S3d until the torsion degree after the pressing pressure is unloaded is consistent with the torsion degree corresponding to the position.
In an embodiment, the bending forming method of the bending steel plate further includes:
s4, detecting radian smoothness of the initial steel plate after the pressing is finished;
s5, adjusting the initial steel plate after pressing according to the detection result.
According to the bending forming method of the bending steel plate, the standard bending member is subjected to modeling treatment, the bending degree of the standard bending member is obtained, the initial steel plate is pressed according to the obtained bending degree, the production efficiency is high, and compared with the traditional hot bending forming method, the processing precision is higher.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a method for forming a bending steel plate according to the present invention.
Fig. 2 is a front view of a pressing die used in the bending forming method of the bending steel plate provided by the invention.
Fig. 3 is a side view of a pressing die used in the bending forming method of the bending steel plate provided by the invention.
Fig. 4 is a schematic structural view of an initial steel plate placed in a pressing mold according to the present invention.
Fig. 5 is a schematic view showing a structure of an initial steel plate pressed by a pressing die.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms described above will be understood to those of ordinary skill in the art in a specific context.
The terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," and the like are used as references to orientations or positional relationships based on the orientation or positional relationships shown in the drawings, or the orientation or positional relationships in which the inventive product is conventionally disposed in use, merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore are not to be construed as limiting the invention.
The terms "first," "second," "third," and the like, are merely used for distinguishing between similar elements and not necessarily for indicating or implying a relative importance or order.
The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a list of elements does not include only those elements but may include other elements not expressly listed.
Referring to fig. 1, the bending forming method of the bending steel plate provided by the invention comprises the following steps:
s1, determining the torsion degrees of the end faces at the two ends of the standard torsion member in the length direction and the torsion degrees of a plurality of cross sections of the standard torsion member.
It is known that the step S1 further includes:
s101, modeling the standard bending member.
It will be appreciated that the standard bending member is a standard for reference in the pressing of an initial steel sheet described below, and the modeling may be performed according to a predetermined ratio, in this embodiment, an equal ratio modeling may be performed. The modeling software may employ Rhino 6 software.
S102, establishing a coordinate system based on the established standard bending member model.
It will be appreciated that the standard bending member model is located in a coordinate system.
And S103, marking a plurality of marking points on the standard bending member model, and determining the end surfaces of the two ends of the standard bending member model in the length direction and the first coordinate positions of the cross section of the standard bending member at the positions of the marking points.
In this embodiment, a plurality of marking points may be disposed on the standard bending member model at equal distances, and it may be understood that the distance between the marking points may be measured along the bending direction between two marking points on the standard bending member model, the marking points may be transverse lines crossing the width direction of the standard bending member model, the end face of the transverse line perpendicular to the standard bending member model is a cross section corresponding to the marking points, and the cross section of the standard bending member model may be a rectangle, so the first coordinate positions of the end face and the cross section may be coordinate positions of four end points of the rectangle.
S104, determining the torsion degree of the cross section corresponding to the end face and the marking point according to the coordinate positions of the end face and the coordinate positions of the cross sections.
Referring to fig. 2 to 4, it is known that the torsion degree of the end face and the torsion degree of the cross section may be the angle between the side edge in the width direction and the horizontal plane.
S2, arranging pressing dies according to the positions of the end surfaces of the two ends of the standard bending member in the length direction and the positions of the cross sections of the standard bending members.
It is understood that the step S2 further includes:
s201, unfolding the standard bending member model to obtain an unfolding torsion steel plate model.
It is to be understood that the stretching in this embodiment means stretching in the longitudinal direction of the standard bending member model, and stretching may be performed with one end face of the standard bending member model as a reference point, or stretching may be performed with a point between both ends of the standard bending member model as a reference point, and the angle of torsion in the height direction of the standard bending member model after stretching may be changed until the length of the obtained stretched steel plate model matches the length of the initial steel plate described below.
S202, determining second coordinate positions of end faces at two ends of the expanded torsion steel plate in the length direction and a plurality of marking points.
It is known that the length of the developed torsion bar model is not identical to the length of the standard torsion bar model, so that the coordinate positions of the end face and the mark point are changed relative to the coordinate system to form a second coordinate position.
And S203, laying a pressing die according to the second coordinate position.
It is understood that step S203 further includes:
and S203a, arranging corresponding pressing dies according to second coordinate positions corresponding to two ends of the expanded torsion steel plate model.
It can be known that a pressing die is placed in a preset layout space, one end of the unfolding torsion steel plate model corresponds to the pressing die, and the position of the pressing die corresponding to the other end is determined according to the position of the other end of the unfolding torsion steel plate model relative to the end.
S203b, determining a second coordinate position of a mark point on the unfolded torsion steel plate model, and determining a pressing mold corresponding to the preset layout point position layout according to the second coordinate position of the mark point, wherein a preset distance is reserved between the preset layout point position and the second coordinate position of the corresponding mark point.
After the pressing dies at the two ends of the expanded torsion steel plate model are determined, the marking points can be transverse lines, the coordinate positions of the marking points can be represented by the coordinates at the two ends of the marking points, a preset distance is reserved between the arrangement points and the second coordinate positions of the corresponding marking points, and the setting of the preset distance can be used for good bending, twisting and smooth transition.
And S3, correspondingly placing the initial steel plate on a pressing die, and sequentially pressing from one end surface in the length direction of the initial steel plate according to the determined torsion degree until the initial steel plate is finished.
It is understood that the step S3 further includes:
s301, placing the end part of the initial steel plate on a corresponding pressing die, and placing the position, corresponding to the mark point on the unfolding torsion steel plate model, on the initial steel plate on the corresponding other pressing dies.
It will be appreciated that the size and state of the expanded torsion steel plate model and the initial steel plate are consistent, the pressing mold corresponding to the end part is determined first, and after the end part is placed on the corresponding pressing mold, the corresponding positions of the rest pressing molds and the initial steel plate are automatically corresponding.
S302, selecting one end face in the length direction of an initial steel plate, and pressing according to the torsion degree of the corresponding end face on a standard torsion member;
and S303, after the pressing is finished, selecting the position of the initial steel plate corresponding to the mark point adjacent to the end surface of the initial steel plate, and calculating the difference value between the torsion degree of the cross section of the initial steel plate corresponding to the adjacent mark point and the torsion degree of the selected end surface.
It is known that after pressing one of the end faces to a preset torsion degree, the curved surface of the initial steel plate corresponding to the adjacent mark point adjacent to the end face is calculated for pressing, the difference between the torsion degree of the cross section of the initial steel plate corresponding to the mark point and the torsion degree of the end face is calculated, the torsion degree of the preset difference is pressed toward the first direction when the difference is a positive value, the torsion degree of the absolute value of the difference is pressed toward the second direction when the difference is a negative value, and the second direction is opposite to the first direction.
S304, pressing the positions of the initial steel plates corresponding to the adjacent marking points according to the difference values;
and S305, repeating the steps S303 and S304 until the pressing of the other end face of the initial steel plate in the length direction is completed.
It is known that, in the pressing process, since the initial steel sheet has a certain resilience, it is difficult to press to a preset torsion degree at one time, and thus the pressing process may include the steps of:
s3a, pressing according to a preset torsion degree or difference value;
s3b, unloading the pressing pressure after the pressing is completed;
s3c, measuring the torsion degree at the corresponding position to determine a rebound value;
s3d, pressing again according to the rebound value;
and S3e, repeating the steps S3b to S3d until the torsion degree after the pressing pressure is unloaded is consistent with the torsion degree corresponding to the position.
It will be appreciated that the rebound value is understood to be the difference between the predetermined degree of torsion and the degree of torsion at the corresponding location, which is generally a positive value, and because it cannot be pressed in place at one time, the degree of torsion at the corresponding location will generally be less than the predetermined degree of torsion, and of course there is the possibility that a problem of the degree of torsion being greater than the predetermined degree of torsion being pressed, the location may be pressed back in the opposite direction, and the detection of the degree of torsion may be measured by an electronic angle meter.
In some embodiments, the method of bending the bent steel sheet further comprises:
s4, detecting radian smoothness of the pressed initial steel plate.
S5, adjusting the pressed initial steel plate according to the detection result.
It will be appreciated that the manner of adjustment may be by flame finishing.
The final steel plate is obtained after the initial steel plate is pressed, the final steel plate is a side plate in the length direction of the standard bending member, the side edges of the final steel plate can represent the height of the standard bending member, when the standard bending member is formed by assembling the steel plates, two ends of the final steel plate can be firstly placed on corresponding jig frames, the area between the two ends of the final steel plate sags due to self weight, the sag is the sag of the standard bending member, if the sag has errors with the sag of the standard bending member, the standard bending member can be finished with stock flame, after the two final steel plates are arranged, the other two side plates and the final steel plate are welded together, and after the welding is finished, the stress between the side plates and the final steel plate can enable the finally formed standard bending member to be kept in a stable state.
Referring to fig. 2 and 3, the pressing mold in this embodiment includes a hydraulic press and a mold, the hydraulic press may include a plurality of main frames 1, a plurality of hydraulic rods and a hydraulic controller, the number of the hydraulic rods is consistent with that of the pressing, the hydraulic rods are assembled in an open accommodating space on the main frames, the hydraulic controller may realize independent control of the hydraulic rods, and may also uniformly control the hydraulic rods, the mold includes a fixing plate 201, an upper mold 202 and a lower mold 203, the upper mold 202 includes two first triangular plates and two second triangular plates, the first triangular plates and the second triangular plates are all connected through the fixing plate 201 and the hydraulic rods, a certain distance is reserved between the first triangular plates and the second triangular plates, the lower mold 203 includes a third triangular plate and a fourth triangular plate, the third triangular plate and the fourth triangular plate are respectively arranged on an inner wall surface of a lower portion of the accommodating space, the first triangular plate and the third triangular plate are opposite in position, the second triangular plate and the fourth triangular plate are opposite in position, the hydraulic rods are assembled on an inner wall surface of an upper portion of the open accommodating space, and the electronic instrument can be arranged in the pressing process of fig. 4 to 5, and the electronic instrument can be used for measuring the pressing angle in the initial pressing process.
As can be seen from the above description, the bending forming method of the bending steel plate provided by the invention has the advantages that the standard bending member is subjected to modeling treatment, the bending degree of the standard bending member is obtained, the initial steel plate is pressed according to the obtained bending degree, the production efficiency is high, and compared with the traditional hot bending forming method, the processing precision is higher.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the present invention. Accordingly, the scope of the invention should be assessed as that of the appended claims.
Claims (7)
1. The bending and forming method of the bending and twisting steel plate is characterized by comprising the following steps of:
s1, determining the torsion degree of end surfaces at two ends of a standard torsion member in the length direction and the torsion degrees of a plurality of cross sections of the standard torsion member;
s2, arranging pressing dies according to the positions of the end surfaces of the two ends of the standard bending member in the length direction and the positions of the cross sections of a plurality of standard bending members;
and S3, correspondingly placing the initial steel plate on the pressing die, and sequentially pressing from one end surface in the length direction of the initial steel plate according to the determined torsion degree until the initial steel plate is finished.
2. The method of forming a bending steel plate according to claim 1, wherein the step S1 of determining the degree of torsion of the end surfaces at both ends in the longitudinal direction of the standard bending member and the degree of torsion of the plurality of cross sections of the standard bending member further comprises:
s101, modeling a standard bending member;
s102, establishing a coordinate system based on the established standard bending component model;
s103, marking a plurality of marking points on the standard bending member model, and determining the end surfaces of the two ends of the standard bending member in the length direction and the first coordinate positions of the cross section of the standard bending member at the positions of the marking points;
s104, determining the torsion degree of the cross section corresponding to the end face and the marking point according to the coordinate positions of the end face and the coordinate positions of the cross sections.
3. The bending forming method of a bending steel plate according to claim 2, wherein the step S2 of arranging a pressing die according to positions of end surfaces of both ends of the standard bending member in a length direction and positions of cross sections of a plurality of the standard bending members, further comprises;
s201, unfolding the standard bending member model to obtain an unfolding torsion steel plate model;
s202, determining second coordinate positions of end faces at two ends of the expanded torsion steel plate in the length direction and a plurality of marking points;
and S203, laying the pressing die according to the second coordinate position.
4. The bending forming method of a bending steel plate according to claim 3, wherein the step S203 of laying the pressing die according to the second coordinate position further comprises:
s203a, arranging corresponding pressing molds according to second coordinate positions corresponding to two ends of the unfolding torsion steel plate model;
s203b, determining a second coordinate position of the marking point on the unfolding torsion steel plate model, and determining a pressing mold corresponding to the preset layout point according to the second coordinate position of the marking point, wherein a preset distance is reserved between the preset layout point and the corresponding second coordinate position of the marking point.
5. The method of forming a bent steel sheet according to claim 3, wherein the step S3 of placing the initial steel sheet on the pressing mold, and pressing the initial steel sheet sequentially from one of the end surfaces in the longitudinal direction of the initial steel sheet according to the determined degree of torsion until the completion, further comprises:
s301, placing the end part of an initial steel plate on a corresponding pressing die, and placing the position, corresponding to the mark point on the unfolding torsion steel plate model, on the initial steel plate on the corresponding other pressing dies;
s302, selecting one end face in the length direction of the initial steel plate, and pressing according to the torsion degree of the corresponding end face on the standard torsion member;
s303, after the pressing is completed, selecting the position of the initial steel plate corresponding to the mark point adjacent to the end surface of the initial steel plate, and calculating the difference value between the torsion degree of the cross section of the initial steel plate corresponding to the adjacent mark point and the torsion degree of the selected end surface;
s304, pressing the positions of the initial steel plates corresponding to the adjacent marking points according to the difference values;
and S305, repeating the steps S303 and S304 until the pressing of the other end face in the length direction of the initial steel plate is completed.
6. The bending forming method of a bending steel plate according to claim 2, wherein the initial steel plate is pressed to the corresponding torsion degree in the following manner:
s3a, pressing according to a preset torsion degree or difference value;
s3b, unloading the pressing pressure after the pressing is completed;
s3c, measuring the torsion degree at the corresponding position to determine a rebound value;
s3d, pressing again according to the rebound value;
and S3e, repeating the steps S3b to S3d until the torsion degree after the pressing pressure is unloaded is consistent with the torsion degree corresponding to the position.
7. The bending forming method of a bending steel plate according to claim 1, wherein the bending forming method of a bending steel plate further comprises:
s4, detecting radian smoothness of the initial steel plate after the pressing is finished;
s5, adjusting the initial steel plate after pressing according to the detection result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311172676.4A CN117340083A (en) | 2023-09-12 | 2023-09-12 | Bending forming method of bending steel plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311172676.4A CN117340083A (en) | 2023-09-12 | 2023-09-12 | Bending forming method of bending steel plate |
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| Publication Number | Publication Date |
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| CN117340083A true CN117340083A (en) | 2024-01-05 |
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| CN202311172676.4A Pending CN117340083A (en) | 2023-09-12 | 2023-09-12 | Bending forming method of bending steel plate |
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| Country | Link |
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| CN (1) | CN117340083A (en) |
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- 2023-09-12 CN CN202311172676.4A patent/CN117340083A/en active Pending
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