CN112756480B - Lamination process for improving scraping and uneven lamination of thin lamination - Google Patents
Lamination process for improving scraping and uneven lamination of thin lamination Download PDFInfo
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- CN112756480B CN112756480B CN202011491462.XA CN202011491462A CN112756480B CN 112756480 B CN112756480 B CN 112756480B CN 202011491462 A CN202011491462 A CN 202011491462A CN 112756480 B CN112756480 B CN 112756480B
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- 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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
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- Mechanical Engineering (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention discloses a lamination process for improving scraping and cutting of thin lamination and uneven lamination, which belongs to the field of part pre-bending dies and comprises the following steps: controlling a pre-bending male die after polishing treatment of the pre-bending inclined plane to go downwards, and primarily bending the part; step two: the pre-bending male die continues to descend into the female die insert of the lower die, and the pre-bending inclined plane bends the part to 135 degrees. Wherein the included angle between the highest point of the pre-bending inclined plane, which is in contact with the thin material, and the vertical direction is 45 degrees, the included angle between the lowest point and the vertical direction is 12 degrees, and cambered surface transition is adopted between the highest point and the lowest point; the beneficial effects of the invention are as follows: the included angle between the highest point of the pre-bending inclined surface and the vertical direction is designed to be 45 degrees, the included angle between the lowest point of the pre-bending inclined surface and the vertical direction is designed to be 12 degrees, and when the die descends, a section of inclined surface between the lowest point of the pre-bending inclined surface and the transitional cambered surface can avoid the maximum rebound angle of the part; when the die continues to descend, the transitional cambered surface can slow down the angle change process, and the problems of material cutting and uneven lamination are solved.
Description
Technical Field
The invention relates to the field of part pre-bending dies, in particular to a lamination process for improving sheet material lamination scraping and cutting and lamination unevenness.
Background
In the high-precision relay part, the part metal part has extremely high lamination requirement, the part after lamination is required to be completely stuck without gaps, the formed root part is not allowed to crack, the part appearance is not allowed to be slightly padded, and the width, the thickness and the like of the part after lamination are all within a certain tolerance.
As shown in fig. 6, the conventional method is that after the part is bent for 90 degrees, a designed pre-bent 45-degree male die is adopted to fold the part into 135-degree angle, when the die descends, the forming male die starts to contact the part, and due to the assembly clearance and precision of the die, the movable structure of spring connection is adopted between the middle die and the upper die, and the like, the male die is stressed to lean backwards in the forming process, the part lamination is deformed and uneven, the width dimension of the part is affected, and due to certain elastic deformation in the plastic process, the rebound phenomenon occurs after external force unloading, and particularly for thin materials, the rebound is more obvious; in the step of bending the lamination by 90 degrees, the theoretical design is 90 degrees, the actual molding is only about 88 degrees, and the actual molding angle is different from the theoretical requirement, so that the pre-bending effect is affected; a45-degree pre-bending male die used in the conventional method is matched with the conventional pre-bending mode, a large amount of scraping materials can be scraped in the pre-bending process, so that part cushioning is damaged, and the requirements of customers cannot be met.
Disclosure of Invention
Aiming at the problems that the lamination is easy to deform in the forming process, the width and the size of a part are affected, rebound phenomenon exists, the thin material is easy to deform and a large number of scraping materials are easy to wipe out in the pre-bending process to cause part cushioning damage in the traditional pre-bending mode, the invention provides a pre-bending male die for the thin material lamination, the included angle between the highest point of a pre-bending inclined plane contacted with the thin material and the vertical direction of the pre-bending male die is 45 degrees, the included angle between the lowest point and the vertical direction is 12 degrees, and cambered surface transition is adopted between the highest point and the lowest point.
The included angle between the highest point of the pre-bent inclined surface contacted with the thin material and the vertical direction is designed to be 45 degrees, the included angle between the lowest point and the vertical direction is designed to be 12 degrees, and when the die descends, a section of inclined surface between the lowest point and the transitional cambered surface can avoid the maximum rebound angle of the part; when the die continues to descend, the transitional cambered surface can slow down the angle change process, and the problems of material cutting and uneven lamination are solved.
Preferably, the transition cambered surface radius of the highest point and the lowest point of the pre-bent inclined surface is 1.0mm, and the vertical distance between the highest point and the lowest point of the pre-bent inclined surface is 2.52mm.
Preferably, the bottom surface of the pre-bending male die is further provided with a bearing part for bearing, and the bearing part is positioned at a position, away from the pre-bending inclined plane, on the pre-bending male die.
The bearing part is used for bearing in the forming process; when the die descends, the length of the male die is inserted into the female die insert of the lower die, and the lower die is of a bearing structure, so that a good bearing effect can be achieved, and the problem of lamination deformation is solved.
Preferably, the bearing part comprises a bearing surface and a positioning surface which are vertically arranged downwards, and an included angle of 90 degrees is formed at the intersection of the bearing surface and the positioning surface.
The invention also relates to a pre-bending process of the thin lamination, which comprises the following steps:
step one, controlling a pre-bending male die after polishing treatment of a pre-bending inclined plane to go downwards, and primarily bending the part;
and step two, continuously descending the pre-bending male die into the female die insert of the lower die, and bending the part to 135 degrees by the pre-bending inclined plane.
Preferably, in the first step, when the pre-bending male die is just positioned at the die insert opening of the lower die, the bending angle theory of the part is 90 degrees, and a rebound angle of 2 degrees exists actually, so that the actual bending angle of the part is 92 degrees.
Preferably, the die for pre-bending comprises an upper die holder, an upper base plate, a fixed plate, a height stopping plate, an upper stripper plate, a lower die plate, a lower base plate and a lower die holder from top to bottom in sequence, wherein the fixed plate is connected with the upper die holder through a spring; the height stopping plate, the upper falling plate and the fixing plate are connected through a sliding rod and a sliding rail.
Preferably, the pre-bending male die is fixedly mounted on the fixing plate, and a lower die female die insert is arranged on the lower die plate at a position corresponding to the pre-bending male die.
The beneficial effects are that:
the technical scheme of the invention has the following beneficial effects:
(1) The included angle between the highest point of the pre-bent inclined surface contacted with the thin material and the vertical direction is designed to be 45 degrees, the included angle between the lowest point and the vertical direction is designed to be 12 degrees, and when the die descends, a section of inclined surface between the lowest point and the transitional cambered surface can avoid the maximum rebound angle of the part; avoiding the maximum angle of the rebound of the parts, reducing the deformation of the part lamination, especially for thin materials, reducing the rebound effect obviously, and the produced parts more meet the demands of customers.
(2) The bearing part is used for bearing in the forming process; when the die descends, the length of the male die is inserted into the female die insert of the lower die, and as the lower die is of a bearing structure, the bearing function is good, the lamination deformation problem is improved, and lamination is more tightly bonded.
(3) The included angle between the highest point of the pre-bending inclined plane, which is in contact with the thin material, and the vertical direction is 45 degrees, the included angle between the lowest point and the vertical direction is 12 degrees, cambered surface transition is adopted between the highest point and the lowest point, and the R angle design of the cambered surface transition is as large as possible under the space permission, so that the problems of material cutting and uneven lamination are solved, and the change process of the angle is slowed down.
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 examples 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 view of a preferred preflex punch of the present invention;
FIG. 2 is a schematic diagram of a second preferred preflex punch of the present invention;
FIG. 3 is a schematic view of a preferred preflex punch of the present invention;
FIG. 4 is a schematic diagram of a preferred preflex punch of the present invention;
FIG. 5 is a schematic view of a preferred preflex die of the present invention;
fig. 6 is a schematic diagram of a prior art preflex die.
In the figure: 1. pre-bending the male die; 2. a part; 3. a cambered surface; 4. a bearing part; 5. an upper die holder; 6. an upper backing plate; 7. a fixing plate; 8. a height stop plate; 9. an upper stripper plate; 10. a lower template; 11. a lower backing plate; 12. a lower die holder; 13. a lower die cavity insert; 14. a spring; 15. slide bar slide rail.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
As shown in fig. 1-5, an included angle R1 between the highest point of a pre-bending inclined plane, which is in contact with a thin material, of the pre-bending male die 1 and the vertical direction is 45 degrees, an included angle R2 between the lowest point and the vertical direction is 12 degrees, and a cambered surface 3 is adopted for transition between the highest point and the lowest point.
The included angle between the highest point of the pre-bent inclined surface contacted with the thin material and the vertical direction is designed to be 45 degrees, the included angle between the lowest point and the vertical direction is designed to be 12 degrees, and when the die descends, one end inclined surface between the lowest point and the transitional cambered surface 3 can avoid the maximum rebound angle of the part 2; when the die continues to descend, the transitional cambered surface 3 can slow down the angle change process, and the problems of material cutting and uneven lamination are solved.
As a preferred embodiment, the radius R of the transitional cambered surface 3 between the highest point and the lowest point of the pre-bending inclined surface is 1.0mm, and the vertical distance between the highest point and the lowest point of the pre-bending inclined surface is 2.52mm.
As a preferred embodiment, the radius R of the transitional cambered surface 3 is 1.0mm.
As a preferred embodiment, the punch height is designed to be 60mm.
As a preferred embodiment, the bottom surface of the pre-bending punch 1 is further formed with a bearing portion 4 for bearing, and the bearing portion 4 is located at a position on the side of the pre-bending punch 1 away from the pre-bending inclined surface.
A bearing part 4 for bearing is arranged for bearing in the forming process; when the die descends, the length of the male die is inserted into the female die insert of the lower die, and the lower die is of a bearing structure, so that a good bearing effect can be achieved, and the problem of lamination deformation is solved.
As a preferred embodiment, the bearing part 4 comprises a bearing surface B and a positioning surface a which are vertically arranged downwards, and an included angle of 90 degrees is formed at the intersection of the bearing surface B and the positioning surface a.
As shown in fig. 1-3, the present invention also relates to a pre-bending process of a thin material lamination, comprising the following steps:
step one, controlling a pre-bending male die 1 subjected to polishing treatment on a pre-bending inclined plane to descend, and primarily bending a part 2;
and step two, the pre-bending male die 1 continues to descend into the lower die female die insert 13, and the pre-bending inclined plane bends the part 2 to 135 degrees.
As a preferred embodiment, in the first step, when the pre-bending punch 1 is just positioned at the die insert opening of the lower die, the bending angle of the part 2 is theoretically 90 °, and a rebound angle of 2 ° exists actually, so the actual bending angle of the part is 92 °.
As a preferred embodiment, the pre-bending die comprises an upper die holder 5, an upper base plate 6, a fixed plate 7, a height-stopping plate 8, an upper stripper plate 9, a lower die plate 10, a lower base plate 11 and a lower die holder 12 from top to bottom, wherein the fixed plate 7 is connected with the upper die holder 5 through a spring 14; the height stop plate 8, the upper release plate 9 and the fixed plate 7 are connected through a slide bar and slide rail 15.
As shown in fig. 1 and 5, as a preferred embodiment, the pre-bending punch 1 is fixedly mounted on the fixing plate 7, and a lower die insert 13 is provided on the lower die plate 10 at a position corresponding to the pre-bending punch 1.
Specifically, in the sequence of fig. 1 to 3, fig. 1 to 3 show the working state of the preflex punch when bending down the part in the present invention. The forming surface of the pre-bending male die is a polished forming surface and is made of alloy, so that the service life of the die and the product quality can be improved.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and various modifications and variations may be made to the present invention by those skilled in the art. 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 (3)
1. The pre-bending process of the thin material lamination is characterized in that a pre-bending male die for the thin material lamination is adopted, a pre-bending inclined plane of the pre-bending male die, which is in contact with the thin material, comprises an upper pre-bending inclined plane and a lower pre-bending inclined plane, wherein an included angle between the upper pre-bending inclined plane and the vertical direction is 45 degrees, an included angle between the lower pre-bending inclined plane and the vertical direction is 12 degrees, and cambered surface transition is adopted between the upper pre-bending inclined plane and the lower pre-bending inclined plane; the bottom surface of the pre-bending male die is also provided with a bearing part for bearing, and the bearing part is positioned at one side of the pre-bending male die, which is far away from the pre-bending inclined plane; the bearing part comprises a bearing surface and a positioning surface which are vertically and downwardly arranged, and an included angle of 90 degrees is formed at the intersection of the bearing surface and the positioning surface;
the pre-bending process comprises the following steps:
step one, controlling a pre-bending male die after polishing treatment of a pre-bending inclined plane to go downwards, and primarily bending the part; when the pre-bending male die is just positioned at the insert opening of the female die of the lower die, the bending angle theory of the part is 90 degrees, and a rebound angle of 2 degrees exists actually, so that the actual bending angle of the part is 92 degrees;
and step two, continuously descending the pre-bending male die into the female die insert of the lower die, and bending the part to 135 degrees by the pre-bending inclined plane.
2. The pre-bending process of the thin laminated sheet according to claim 1, wherein a die adopted in the pre-bending process sequentially comprises an upper die holder, an upper base plate, a fixing plate, a height-stopping plate, an upper stripper plate, a lower die plate, a lower base plate and a lower die holder from top to bottom, and the fixing plate is connected with the upper die holder through a spring; the height stopping plate, the upper falling plate and the fixing plate are connected through a sliding rod and a sliding rail.
3. The pre-bending process of the thin laminated sheet according to claim 2, wherein the pre-bending male die is fixedly mounted on the fixing plate, and a lower die female die insert is arranged on the lower die plate at a position corresponding to the pre-bending male die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011491462.XA CN112756480B (en) | 2020-12-17 | 2020-12-17 | Lamination process for improving scraping and uneven lamination of thin lamination |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011491462.XA CN112756480B (en) | 2020-12-17 | 2020-12-17 | Lamination process for improving scraping and uneven lamination of thin lamination |
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| Publication Number | Publication Date |
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| CN112756480A CN112756480A (en) | 2021-05-07 |
| CN112756480B true CN112756480B (en) | 2023-04-21 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07290158A (en) * | 1994-04-27 | 1995-11-07 | Toyota Motor Corp | Roller hemming device |
| WO2013170401A1 (en) * | 2012-05-18 | 2013-11-21 | Cui Xuejun | New method for producing surrounding connection of heat-insulating protecting component |
| CN203030713U (en) * | 2012-12-05 | 2013-07-03 | 绵阳高新区恒奥电子科技有限公司 | Numerical control bending cutter |
| CN103302144B (en) * | 2013-06-13 | 2018-09-25 | 昆山万禾精密电子有限公司 | The processing method of 90 ° of flangings of plate-type work and its bending device used |
| CN203356367U (en) * | 2013-06-25 | 2013-12-25 | 珠海蓝冠电子科技有限公司 | Structure bending 90 degrees of progressive die |
| CN103480759B (en) * | 2013-09-29 | 2015-12-16 | 东莞誉铭新工业有限公司 | A kind of handware pin bending mechanism and bending method |
| CN210547428U (en) * | 2019-06-27 | 2020-05-19 | 安特（惠州）工业有限公司 | Three-section type 180-degree bending device |
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