CN112756480A - Lamination process for improving thin material lamination scraping and lamination unevenness - Google Patents
Lamination process for improving thin material lamination scraping and lamination unevenness Download PDFInfo
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- CN112756480A CN112756480A CN202011491462.XA CN202011491462A CN112756480A CN 112756480 A CN112756480 A CN 112756480A CN 202011491462 A CN202011491462 A CN 202011491462A CN 112756480 A CN112756480 A CN 112756480A
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- bending
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- thin material
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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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- Mounting, Exchange, And Manufacturing Of Dies (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention discloses a lamination process for improving thin material lamination scraping and lamination unevenness, belonging to the field of part pre-bending dies and comprising the following steps: controlling the pre-bending male die of which the pre-bending inclined plane is subjected to polishing treatment to descend, and primarily bending the part; step two: and the pre-bending male die continuously descends to enter the lower die and female die insert, 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 contacted with the thin material and the vertical direction of the pre-bending convex die is 45 degrees, the included angle between the lowest point and the vertical direction is 12 degrees, and the highest point and the lowest point are in arc surface transition; the invention has the beneficial effects that: the included angle between the highest point of the pre-bending inclined plane and the vertical direction is designed to be 45 degrees, the included angle between the lowest point of the pre-bending inclined plane and the vertical direction is designed to be 12 degrees, and when the die descends, a section of inclined plane between the lowest point and the transition cambered surface can avoid the maximum angle of part rebound; when the die continues to move downwards, the transitional cambered surface can slow down the change process of the angle and improve the problems of material cutting and uneven lamination.
Description
Technical Field
The invention relates to the field of part pre-bending dies, in particular to a lamination process for improving thin material lamination scraping and lamination unevenness.
Background
In the high-precision relay part, extremely high lamination requirements are required for part of metal parts, the laminated parts are required to be completely attached without gaps, cracks are not allowed at the formed root, slight cushion damage is not allowed on the appearance of the parts, and the width, the thickness and the like of the laminated parts are within a certain tolerance.
As shown in fig. 6, according to the conventional method, after a part is bent by 90 degrees, a designed pre-bent 45-degree male die is adopted to bend the part into an angle of 135 degrees, when a die descends, a forming male die starts to contact the part, due to the problems of assembly clearance and precision of the die, a movable structure connected by a spring is arranged between a middle die and an upper die, and the like, in the forming process, the male die is stressed backwards, part laminations are deformed and uneven, the width size of the part is influenced, and due to certain elastic deformation included in the plasticity process, a rebound phenomenon can occur after external force is unloaded, and is particularly more obvious for thin materials; in the step of bending the lamination by 90 degrees, the theoretical design is 90 degrees, the actual forming is only about 88 degrees, and the difference between the actual forming angle and the theoretical requirement exists, so that the pre-bending effect is influenced; the pre-bending 45-degree male die used in the traditional method is matched with the traditional pre-bending mode, a large amount of material scraps can be scraped in the pre-bending process, so that the part cushion damage is caused, and the requirements of customers cannot be met.
Disclosure of Invention
The invention provides a pre-bending male die for thin material lamination, which aims to solve the problems that in the traditional pre-bending mode, a lamination is easy to deform in the forming process, the width size of a part is influenced, the springback phenomenon exists, a thin material is easy to deform, and a large amount of material is easy to scrape in the pre-bending process to cause part damage.
The included angle between the highest point of the pre-bending inclined plane and the vertical direction, which is in contact with the thin material, 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, the maximum angle of the rebound of the part can be avoided by the inclined plane between the lowest point and the transition cambered surface; when the die continues to move downwards, the transitional cambered surface can slow down the change process of the angle and improve the problems of material cutting and uneven lamination.
Preferably, the radius of the transition arc surface between the highest point and the lowest point of the pre-bending inclined plane is 1.0mm, and the vertical distance between the highest point and the lowest point of the pre-bending inclined plane is 2.52 mm.
Preferably, a bearing part for bearing is further formed on the bottom surface of the pre-bending male die, and the bearing part is located on one side of the pre-bending male die, which is far away from the pre-bending inclined surface.
The bearing part is used for bearing and leaning, and is used for bearing and leaning in the forming process; when the die moves downwards, 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 a 90-degree included angle 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 material lamination, which comprises the following steps:
controlling a pre-bending convex die of which the pre-bending inclined plane is subjected to polishing treatment to descend, and primarily bending a part;
and step two, the pre-bending male die continuously descends until the pre-bending male die enters the lower die female die insert, and the pre-bending inclined plane bends the part to 135 degrees.
Preferably, in the step one, when the pre-bending male die is right at the insert opening of the lower die female die, the bending angle of the part is 90 degrees theoretically, and a rebound angle of 2 degrees actually exists, so that the actual bending angle of the part is 92 degrees.
Preferably, the mold for pre-bending comprises an upper mold base, an upper backing plate, a fixing plate, a height stop plate, an upper stripping plate, a lower mold plate, a lower backing plate and a lower mold base from top to bottom in sequence, wherein the fixing plate is connected with the upper mold base through a spring; the height stopping plate, the upper releasing plate and the fixed plate are connected through a slide rod and a slide rail.
Preferably, the pre-bending male die is fixedly mounted on the fixing plate, and a lower die female die insert is arranged at a position on the lower die plate corresponding to the pre-bending male die.
Has the advantages that:
the technical scheme of the invention has the following beneficial effects:
(1) the included angle between the highest point of the pre-bending inclined plane in contact with the thin material and the vertical direction is designed to be 45 degrees, the included angle between the lowest point of the pre-bending inclined plane and the vertical direction is designed to be 12 degrees, and when the die descends, a section of inclined plane between the lowest point and the transition cambered surface can avoid the maximum rebound angle of the part; the maximum angle of part resilience is avoided, so that the part lamination deformation is reduced, particularly for thin materials, the resilience reducing effect is obvious, and the produced part meets the requirements of customers better.
(2) The bearing part is used for bearing and leaning, and is used for bearing and leaning in the forming process; when the die moves downwards, 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, the problem of lamination deformation is solved, and the lamination is attached more tightly.
(3) The included angle between the highest point of the pre-bending inclined plane and the vertical direction, which is contacted with the thin material, of the pre-bending convex die is 45 degrees, the included angle between the lowest point and the vertical direction is 12 degrees, the R angle of the arc surface transition is designed to be as large as possible under the allowance of space, the change process of the angle is favorably slowed down, and the problems of material cutting and uneven lamination are solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a first schematic view of a preferred pre-bending punch of the present invention;
FIG. 2 is a second schematic view of a preferred pre-curved punch of the present invention;
FIG. 3 is a third schematic view of a preferred pre-bending punch of the present invention;
FIG. 4 is a fourth schematic view of a preferred pre-bending punch of the present invention;
FIG. 5 is a schematic view of a preferred preflex mold of the present invention;
fig. 6 is a schematic view of a prior art preflex mold.
In the figure: 1. pre-bending a male die; 2. a part; 3. a cambered surface; 4. a bearing part; 5. an upper die holder; 6. an upper base plate; 7. a fixing plate; 8. a height stopping plate; 9. an upper stripping plate; 10. a lower template; 11. a lower base plate; 12. a lower die holder; 13. a lower die concave die insert; 14. a spring; 15. slide bar slide rail.
Detailed Description
In order to make 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 described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, 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, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in figures 1-5, the pre-bending punch 1 for the thin material lamination is characterized in that an included angle R1 between the highest point of a pre-bending inclined plane and the vertical direction, which is contacted with the thin material, of the pre-bending punch 1 is 45 degrees, an included angle R2 between the lowest point and the vertical direction is 12 degrees, and the highest point and the lowest point are in transition by adopting an arc surface 3.
The included angle between the highest point of the pre-bending inclined plane and the vertical direction, which is in contact with the thin material, 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, the maximum rebound angle of the part 2 can be avoided by the inclined plane at one end between the lowest point and the transition arc surface 3; when the die continues to move downwards, the transitional cambered surface 3 can slow down the change process of the angle and improve the problems of material cutting and uneven lamination.
In a preferred embodiment, the radius R of the transition arc surface 3 between the highest point and the lowest point of the pre-bending inclined plane is 1.0mm, and the vertical distance between the highest point and the lowest point of the pre-bending inclined plane is 2.52 mm.
In a preferred embodiment, the radius R of the transition arc 3 is 1.0 mm.
In a preferred embodiment, the height of the punch is 60 mm.
In a preferred embodiment, the bottom surface of the pre-bending punch 1 is further formed with a bearing part 4 for bearing, and the bearing part 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 moves downwards, 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 process for pre-bending a laminate of thin materials, comprising the steps of:
controlling a pre-bending male die 1 with a polished pre-bending inclined plane to move downwards, and primarily bending a part 2;
and step two, the pre-bending male die 1 continues to descend to enter the lower die and 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 right at the opening of the lower die cavity insert, the bending angle of the part 2 is theoretically 90 degrees, and a rebound angle of 2 degrees actually exists, so that the actual bending angle of the part is 92 degrees.
As a preferred embodiment, the mold for pre-bending comprises an upper mold base 5, an upper backing plate 6, a fixed plate 7, a height stop plate 8, an upper stripping plate 9, a lower mold plate 10, a lower backing plate 11 and a lower mold base 12 from top to bottom in sequence, and the fixed plate 7 is connected with the upper mold base 5 through a spring 14; the height-stopping plate 8, the upper stripping plate 9 and the fixed plate 7 are connected through a slide bar slide rail 15.
As shown in fig. 1 and 5, as a preferred embodiment, the pre-bending punch 1 is fixedly mounted on the fixed plate 7, and the lower die plate 10 is provided with a lower die insert 13 at a position corresponding to the pre-bending punch 1.
Specifically, fig. 1 to 3 show the working state of the pre-bending punch of the present invention when bending a part downward, in the order of fig. 1 to 3. In addition, the forming surface of the pre-bending convex die is a polished forming surface and is made of alloy materials, so that the service life of the die can be prolonged, and the product quality can be improved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The pre-bending male die for the thin material lamination is characterized in that the included angle between the highest point of a pre-bending inclined plane and the vertical direction, which is contacted with a thin material, of the pre-bending male die is 45 degrees, the included angle between the lowest point and the vertical direction is 12 degrees, and the highest point and the lowest point are in arc surface transition.
2. The pre-bending male die for the thin material lamination as claimed in claim 1, wherein the radius of a transition arc surface between the highest point and the lowest point of the pre-bending bevel is 1.0mm, and the vertical distance between the highest point and the lowest point of the pre-bending bevel is 2.52 mm.
3. The pre-bending punch for the thin material lamination as claimed in claim 2, wherein the bottom surface of the pre-bending punch is further formed with a bearing part for bearing, and the bearing part is positioned on one side of the pre-bending punch away from the pre-bending inclined surface.
4. The pre-bending male die for the thin material lamination as claimed in claim 3, wherein 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.
5. A process for pre-bending a laminate of thin materials, characterized in that a pre-bending male die according to claim 4 is used, comprising the following steps:
controlling a pre-bending convex die of which the pre-bending inclined plane is subjected to polishing treatment to descend, and primarily bending a part;
and step two, the pre-bending male die continuously descends until the pre-bending male die enters the lower die female die insert, and the pre-bending inclined plane bends the part to 135 degrees.
6. The process for pre-bending the thin material lamination according to claim 5, wherein in the step one, when the pre-bending male die is right at the opening of the lower die female die insert, the bending angle of the part is theoretically 90 degrees, and a rebound angle of 2 degrees actually exists, so that the actual bending angle of the part is 92 degrees.
7. The thin material lamination pre-bending process according to claim 6, wherein a die for pre-bending sequentially comprises an upper die holder, an upper backing plate, a fixing plate, a height stop plate, an upper stripping plate, a lower die plate, a lower backing 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 releasing plate and the fixed plate are connected through a slide rod and a slide rail.
8. The thin material lamination pre-bending process according to claim 7, wherein the pre-bending male die is fixedly installed 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 |
Applications Claiming Priority (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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| Publication Number | Publication Date |
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| CN112756480A true CN112756480A (en) | 2021-05-07 |
| CN112756480B CN112756480B (en) | 2023-04-21 |
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| CN202011491462.XA Active CN112756480B (en) | 2020-12-17 | 2020-12-17 | Lamination process for improving scraping and uneven lamination of thin lamination |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07290158A (en) * | 1994-04-27 | 1995-11-07 | Toyota Motor Corp | Roller hemming device |
| 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 |
| CN103302144A (en) * | 2013-06-13 | 2013-09-18 | 昆山万禾精密电子有限公司 | Processing method of 90-degree folding edge of plate-type workpiece and bending device utilized by method |
| 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 |
| CN103480759A (en) * | 2013-09-29 | 2014-01-01 | 东莞誉铭新工业有限公司 | Hardware plug foot bending mechanism and bending method |
| CN103702779A (en) * | 2012-05-18 | 2014-04-02 | 崔学君 | New method for producing surrounding connection of heat-insulating protecting component |
| 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 |
-
2020
- 2020-12-17 CN CN202011491462.XA patent/CN112756480B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07290158A (en) * | 1994-04-27 | 1995-11-07 | Toyota Motor Corp | Roller hemming device |
| CN103702779A (en) * | 2012-05-18 | 2014-04-02 | 崔学君 | 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 |
| CN103302144A (en) * | 2013-06-13 | 2013-09-18 | 昆山万禾精密电子有限公司 | Processing method of 90-degree folding edge of plate-type workpiece and bending device utilized by method |
| 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 |
| CN103480759A (en) * | 2013-09-29 | 2014-01-01 | 东莞誉铭新工业有限公司 | Hardware plug foot 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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| CN112756480B (en) | 2023-04-21 |
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