CN112935043A - Method for eliminating corner pressing crack of folded elbow plate - Google Patents
Method for eliminating corner pressing crack of folded elbow plate Download PDFInfo
- Publication number
- CN112935043A CN112935043A CN202110119387.2A CN202110119387A CN112935043A CN 112935043 A CN112935043 A CN 112935043A CN 202110119387 A CN202110119387 A CN 202110119387A CN 112935043 A CN112935043 A CN 112935043A
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- Prior art keywords
- plate
- eliminating
- toggle plate
- toggle
- line
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- 238000003825 pressing Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000003754 machining Methods 0.000 claims abstract description 4
- 238000009957 hemming Methods 0.000 claims description 14
- 238000005336 cracking Methods 0.000 claims description 3
- 238000002788 crimping Methods 0.000 claims 1
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
-
- 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
The invention relates to the technical field of ships, in particular to a method for eliminating angle pressing cracks of a folded elbow plate, which comprises the following steps: s1, extending a set distance along the direction of the elbow plate root by two root reserving points at two sides of the elbow plate, and determining the circle center of the crack arrest circular arc; s2, connecting the circle centers in a straight line to determine a toggle plate angle pressing line; s3, machining the crack arrest circular arc on the toggle plate according to the set distance; s4, translating a first marking line of the size of the remained root of the folded edge and a second marking line of the folded edge length by taking the angle pressing line of the toggle plate as a reference; and S5, chamfering the corners of the toggle plate at the area parts of the first marking line and the second marking line. The invention can eliminate the cracks at the folded edge in the pressing process of the toggle plate, thereby ensuring the quality of the toggle plate.
Description
Technical Field
The invention relates to the technical field of ships, in particular to a method for eliminating angle pressing cracks of a folded elbow plate.
Background
In the joining of hull components, toggle plates are used very widely. The toggle plate is additionally arranged, so that the nodes can be connected more firmly. The toggle plate can play the role of a gusset plate, reduce stress concentration at the corner joint of the beam and reduce the deformation and bending moment of the beam. The specification of the beam can be reduced under the same load. In order to ensure the stability of the toggle plate, the specifications provide: the toggle plate at the end part of the main component is provided with a folded edge or a panel; when the free edge of the toggle plate at the end of the secondary member is 40 times larger than the plate thickness, the toggle plate should have a folded edge or a panel.
Under the same condition, the folded edge of the toggle plate does not need to be welded, two welding seams can be reduced compared with the added panel, considerable cost can be saved under a huge base number, the construction period is shortened, but the folded edge angle of the folded edge toggle plate is 90 degrees, cracks are easy to appear at the folded edge in the pressing process, and the quality of the toggle plate is influenced.
Therefore, a method for eliminating the corner pressing crack of the flanging toggle plate is needed to solve the technical problem.
Disclosure of Invention
The invention aims to provide a method for eliminating the corner pressing cracks of a folded elbow plate, which can eliminate the cracks at the folded edge in the elbow plate pressing process so as to ensure the quality of the elbow plate.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for eliminating corner pressing cracks of a folded elbow plate comprises the following steps:
s1, extending a set distance along the direction of the elbow plate root by two root reserving points at two sides of the elbow plate, and determining the circle center of the crack arrest circular arc;
s2, connecting the circle centers in a straight line to determine a toggle plate angle pressing line;
s3, machining the crack arrest circular arc on the toggle plate according to the set distance;
s4, translating a first marking line of the size of the remained root of the folded edge and a second marking line of the folded edge length by taking the angle pressing line of the toggle plate as a reference;
and S5, chamfering the corners of the toggle plate at the area parts of the first marking line and the second marking line.
Further, in step S4, when the plate thickness of the toggle plate is less than 13mm, the stub length is 15 mm.
Further, in step S4, when the plate thickness of the toggle plate is not less than 13mm, the stub length is 20 mm.
Further, in step S4, the hemming length is equal to the hemming value minus two-thirds of the plate thickness.
Further, the folding value can be calibrated.
Further, the set distance is 15 mm.
Further, in step S3, the arcs on both sides of the crack arrest circular arc are each inverted by an angle of 45 °.
Further, the two chamfer lines generated at the arc positions after the chamfer angle of 45 degrees are further chamfered by an angle of 45 degrees.
Further, the first marking line and the second marking line are marked on the toggle plate.
Further, in step S5, an angle between the chamfered line at the chamfered position of the corner and the first mark line is 30 °.
The invention has the beneficial effects that:
the method for eliminating the pressure angle cracks of the flanged elbow plate provided by the invention is characterized in that two root points at two sides of the elbow plate are extended for a set distance along the direction of the root of the elbow plate, the circle center of a crack-stopping circular arc is determined, the two circle centers are linearly connected to form an elbow plate pressure angle line, the crack-stopping circular arc is processed on the elbow plate, and the stress concentration in the elbow plate pressing process is further reduced by chamfering the corners of the first marking line and the second marking line area because the tangent line of the intersection point between the elbow plate pressure angle line and the crack-stopping circular arc is vertical to the elbow plate pressure angle line, so that the stress concentration is reduced, the two ends of the elbow plate pressure angle line are transited smoothly, and the stress concentration in the elbow plate pressing process is further reduced, so that the cracks at the flanged part can be eliminated in the elbow plate pressing.
Drawings
FIG. 1 is a schematic view of a toggle plate in a method for eliminating corner pressing cracks of a flanged toggle plate according to the invention.
In the figure:
1. reserving a root on the toggle plate; 11. reserving a root point; 2. a first marking line; 3. pressing an angle line by a toggle plate; 4. and (5) stopping cracking of the circular arc.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings and the embodiment. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In order to eliminate cracks at the folded edge during the pressing process of the toggle plate, thereby ensuring the quality of the toggle plate, the invention provides a method for eliminating the cracks of the folded angle of the toggle plate, as shown in figure 1. The method for eliminating the corner pressing crack of the folded elbow plate comprises the following steps:
s1, extending the two root reserving points 11 on the two sides of the toggle plate along the direction of the root reserving 1 of the toggle plate for a set distance, and determining the circle center of the crack arrest circular arc 4;
s2, connecting the two circle centers in a straight line to determine an elbow plate pressure angle line 3;
s3, processing a crack arrest circular arc 4 on the toggle plate according to a set distance;
s4, using the toggle plate angle pressing line 3 as a reference to horizontally move out of the first marking line 2 of the base size of the folded edge and the second marking line of the length of the folded edge;
and S5, chamfering the corners of the toggle plate at the area parts of the first marking line 2 and the second marking line.
The circle center of a crack arrest circular arc 4 is determined by extending a set distance along the direction of a reserved elbow root 1 by two reserved root points 11 on two sides of a toggle plate, the two circle centers are linearly connected to form a toggle plate corner pressing line 3, the crack arrest circular arc 4 is processed on the toggle plate, and because the tangent of the intersection point between the toggle plate corner pressing line 3 and the crack arrest circular arc 4 is perpendicular to the toggle plate corner pressing line 3, stress concentration is reduced, the two ends of the toggle plate corner pressing line 3 are in smooth transition, the stress concentration in the toggle plate pressing process is further reduced by beveling the corners of the first marking line 2 and the second marking line area, cracks at the edge folding part can be eliminated in the toggle plate pressing process, and the quality of the toggle plate is ensured.
Further, in step S4, a root remaining dimension is marked as a, and when the plate thickness of the toggle plate is less than 13mm, the root remaining dimension a is 15 mm; when the plate thickness of the toggle plate is not less than 13mm, the root remaining dimension A is 20 mm.
Further, in step S4, a hemming length B is marked, which is equal to the hemming value minus two-thirds of the plate thickness. Specifically, in this embodiment, the hemming value can be calibrated, and a designer of a specific numerical value of the hemming value can design the hemming value according to actual needs without much limitation.
Further, in step S5, the angle between the chamfered line at the chamfered rear corner and the first mark line 2 is 30 °, which can effectively prevent stress concentration, thereby eliminating cracks at the folded edge during the toggle plate pressing process, and ensuring the quality of the toggle plate.
Further, the set distance was 15 mm. Similarly, the radius of the crack arrest circular arc 4 is also 15 mm. Because the radius of the crack arrest circular arc 4 is too small, the crack arrest circular arc 4 cannot play a role, the too large radius can reduce the strength of the toggle plate, and the radius is 15mm, which is most suitable through experiments. In other embodiments, the set distance may be about 15mm, and is not limited herein.
Further, in step S3, the arcs on both sides of the crack arrest circular arc 4 are each chamfered by 45 °. And stress concentration at right angles at two sides of the crack arrest circular arc 4 in the pressing process is reduced. In this embodiment, the arcs on both sides of the crack arrest circular arc 4 are directly polished for 3mm and formed once. In other embodiments, further, the two chamfer lines generated at the arc positions after the chamfer angle of 45 are further chamfered by an angle of 45. This kind of mode directly polishes the pitch arc of the both sides of crack arrest circular arc 4, and about 2mm polishes two chamfer lines again, can reduce the influence of chamfer to the intensity of bracket.
Further, a first marking line 2, a second marking line and a toggle plate corner pressing line 3 are marked on the toggle plate. By marking the first marking line 2 and the second marking line on the toggle plate, the toggle plate can be conveniently machined by a machining person.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A method for eliminating corner pressing cracks of a folded elbow plate is characterized by comprising the following steps:
s1, extending the two root reserving points (11) on the two sides of the toggle plate along the direction of the root reserving point (1) of the toggle plate for a set distance, and determining the circle center of the crack arrest circular arc (4);
s2, connecting the circle centers in a straight line to determine a toggle plate angle pressing line (3);
s3, machining the crack arrest circular arc (4) on the toggle plate according to the set distance;
s4, taking the elbow plate corner pressing line (3) as a reference, and horizontally moving out a first marking line (2) of the folded edge root-remaining size and a second marking line of the folded edge length;
and S5, chamfering the corners of the toggle plate at the area parts of the first marking line (2) and the second marking line.
2. The method for eliminating corner pressing cracks of a folded elbow plate according to claim 1, wherein in the step S4, when the plate thickness of the elbow plate is less than 13mm, the root remaining size is 15 mm.
3. The method for eliminating corner pressing cracks of a folded elbow plate according to claim 1, wherein in the step S4, when the plate thickness of the elbow plate is not less than 13mm, the root remaining size is 20 mm.
4. The method of eliminating hemming toggle plate corner pressing cracks of claim 1 wherein in step S4 the hem length is equal to the hem value minus two thirds of the plate thickness.
5. A method of eliminating hemming toggle plate corner pressing cracks according to claim 4 wherein the hemming values can be calibrated.
6. A method of eliminating hemming toggle plate corner pressing cracks according to claim 1 wherein the set distance is 15 mm.
7. A method for eliminating creasing and corner cracking in flanged elbow as claimed in claim 1, wherein in step S3, the arcs on both sides of the crack arrest arc (4) are each chamfered by 45 °.
8. A method of eliminating hemming toggle plate corner clip cracking according to claim 7 wherein the two chamfer lines created at the arc position after the 45 ° chamfer are further chamfered by 45 °.
9. A method of eliminating hemming toggle joint corner crimping cracks according to claim 1 wherein the first marking line (2) and the second marking line are marked on the toggle joint.
10. A method for eliminating hemming toggle plate corner pressing crack according to claim 1 wherein in step S5, the angle between the chamfered line of the position of the corner after chamfering and the first marking line (2) is 30 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110119387.2A CN112935043A (en) | 2021-01-28 | 2021-01-28 | Method for eliminating corner pressing crack of folded elbow plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110119387.2A CN112935043A (en) | 2021-01-28 | 2021-01-28 | Method for eliminating corner pressing crack of folded elbow plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112935043A true CN112935043A (en) | 2021-06-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110119387.2A Pending CN112935043A (en) | 2021-01-28 | 2021-01-28 | Method for eliminating corner pressing crack of folded elbow plate |
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| Country | Link |
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| CN (1) | CN112935043A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100001455U (en) * | 2008-07-31 | 2010-02-10 | 대우조선해양 주식회사 | Movable longitudinal fixing apparatus |
| CN105215270A (en) * | 2015-10-21 | 2016-01-06 | 南车长江车辆有限公司 | Thin-walled frame-type steel-casting cracking strip structure |
| CN204979124U (en) * | 2015-09-15 | 2016-01-20 | 裴志勇 | Boats and ships antifatigue elastic joint |
| CN106314700A (en) * | 2015-07-02 | 2017-01-11 | 烟台中集来福士海洋工程有限公司 | Ocean platform, connecting bracket plate, and design method of connecting bracket plate |
| CN206544575U (en) * | 2017-03-09 | 2017-10-10 | 上海船舶研究设计院（中国船舶工业集团公司第六0四研究院） | A kind of Novel anti-fatigue bracket |
| CN109277710A (en) * | 2018-11-09 | 2019-01-29 | 南通中远海运川崎船舶工程有限公司 | A kind of Large Container Ship case foot reinforced structure and process |
| CN112173003A (en) * | 2020-09-22 | 2021-01-05 | 广州文冲船厂有限责任公司 | Flanging structure of toggle plate and manufacturing method thereof |
-
2021
- 2021-01-28 CN CN202110119387.2A patent/CN112935043A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100001455U (en) * | 2008-07-31 | 2010-02-10 | 대우조선해양 주식회사 | Movable longitudinal fixing apparatus |
| CN106314700A (en) * | 2015-07-02 | 2017-01-11 | 烟台中集来福士海洋工程有限公司 | Ocean platform, connecting bracket plate, and design method of connecting bracket plate |
| CN204979124U (en) * | 2015-09-15 | 2016-01-20 | 裴志勇 | Boats and ships antifatigue elastic joint |
| CN105215270A (en) * | 2015-10-21 | 2016-01-06 | 南车长江车辆有限公司 | Thin-walled frame-type steel-casting cracking strip structure |
| CN206544575U (en) * | 2017-03-09 | 2017-10-10 | 上海船舶研究设计院（中国船舶工业集团公司第六0四研究院） | A kind of Novel anti-fatigue bracket |
| CN109277710A (en) * | 2018-11-09 | 2019-01-29 | 南通中远海运川崎船舶工程有限公司 | A kind of Large Container Ship case foot reinforced structure and process |
| CN112173003A (en) * | 2020-09-22 | 2021-01-05 | 广州文冲船厂有限责任公司 | Flanging structure of toggle plate and manufacturing method thereof |
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| PB01 | Publication | ||
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Application publication date: 20210611 |