CN111957787A - Technological method for flanging and rolling cold stamping die - Google Patents
Technological method for flanging and rolling cold stamping die Download PDFInfo
- Publication number
- CN111957787A CN111957787A CN202010729074.4A CN202010729074A CN111957787A CN 111957787 A CN111957787 A CN 111957787A CN 202010729074 A CN202010729074 A CN 202010729074A CN 111957787 A CN111957787 A CN 111957787A
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- flanging
- workpiece
- rounding
- stamping die
- cold stamping
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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
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
- B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention belongs to the technical field of automobile part manufacturing, and particularly relates to a technological method for flanging and rolling a cold stamping die; the method comprises three steps of shaping, upward flanging and downward shaping, wherein the shaping is to turn the workpiece upward to form a flanging, the upward flanging is to turn the workpiece upward to form a primary rolling circle, and the downward shaping is to further roll the workpiece inward to form a required rolling circle; the method can realize the flanging edge rolling modeling in a common stamping die without additionally adding a special die.
Description
Technical Field
The invention belongs to the technical field of automobile part manufacturing, and particularly relates to a technological method for flanging and rolling a cold stamping die.
Background
With the rapid development of automobile technology, consumers have higher demands on the overall comfort and shape of automobiles, and not only the outer covering part of the automobile needs to be attractive, but also the appearance quality of the inner plate needs to be ensured.
The edge of the inner plate part which leaks from the existing part is very sharp, so that the inner plate part is not beautiful, and is possibly scratched by mistake. In order to solve the problems, the edge part of the plate can be subjected to the rolling treatment, because the flanging female die used for inward rolling and flanging completely wraps the part, the short edge is close to be closed after forming, the filling male die cannot be added in the interior of the short edge like a common die, but the filling male die needs to be added in the interior of the short edge like the common die, and the inward rolling and flanging finished by the prior art is not practical for the common die.
Disclosure of Invention
In order to overcome the problems, the invention provides a technological method for flanging and rounding a cold stamping die, which can realize flanging and rounding modeling in a common stamping die without additionally adding a special die.
A process method for flanging and rolling a cold stamping die comprises the following steps:
step one, shaping
Placing the workpiece 1 on the first lower male die 14, enabling one end of the workpiece 1 to be located at the horizontal part of the left end of the first lower male die 14, pressing the other end of the workpiece 1 by the first upper pressure plate 13, enabling the workpiece 1 to be fixed, and pressing the part, required to be turned and rolled, of the workpiece 1 into a shallow pit of the first lower male die 14 through the shaping insert 12 to form a turned edge 11, with the edge of the workpiece 1 facing upwards;
step two, flanging upwards
Taking the workpiece 1 off the first lower punch 14 and then placing the workpiece on the lower pressure plate 18, pressing the workpiece 1 by using the upper punch 17 to fix the workpiece 1, placing the first flanging insert 19 at the bottom of the workpiece 1, connecting the right end of the first flanging insert 19 to the left end of the lower pressure plate 18 in a matching manner, and turning up the flanging 11 between the lower pressure plate 18 and the upper punch 17 to form a primary edge 15;
step three, shaping downwards
The workpiece 1 is taken down from the lower material pressing plate 18 and then placed on the second lower punch 22, the workpiece 1 is pressed by the second upper material pressing plate 21, so that the workpiece 1 is fixed, the right end of the second flanging insert 20 is connected to the left end of the second lower punch 22 in a matching manner, and at the moment, the preliminary rolling circle 15 of the workpiece 1 is further curled inwards by the second flanging insert 20 to form the required rolling circle 16.
The first lower punch 14 is a single piece and comprises a first horizontal section 141, a recess 142 and a first bending section 143, the object 1 is placed on the first lower punch 14, such that one end of the object 1 is located on the first horizontal section 141 at the left end of the first lower punch 14, and the other end of the object 1 is placed on the first bending section 143 across the recess 142.
The first bending section 143 changes with the shape of the part of the object 1 after crossing the concave 142, so that the part of the object 1 after crossing the concave 142 can be attached to the first bending section 143.
The reshaping insert 12 is a single piece and comprises a pressing edge part 121 and a following part 122, wherein the pressing edge part 121 presses the part of the product 1 which needs to be flanged and rounded into the concave pit 142 of the first lower male die 14.
The upper male die 24 is a single piece and includes a first circular arc portion 181 and a second curved portion 182, and the shape of the second curved portion 182 changes with the shape of the first curved section 143.
The lower pressing plate 23 includes a second arc portion 171 and a third curved portion 172, the shape of the third curved portion 172 changes with the shape of the first curved portion 143, the portion of the object 1 other than the flange 11 is located between the third curved portion 172 and the second curved portion 182, and the flange 11 is located between the first arc portion 181 and the second arc portion 171.
The first flanging insert 19 is an integral piece and comprises a second horizontal section 191 and a third arc portion 192, wherein the third arc portion 192 is matched with the second bending portion 182 to form a semicircle, namely, the flanging 11 is turned upwards to form a preliminary bead 15, the bottom of the preliminary bead 15 is a semicircle, and the size of the semicircle formed by matching the third arc portion 192 with the second bending portion 182 are the same.
The second lower punch 22 is a single piece and comprises a fourth curved portion 221 and a semicircular portion 222, wherein the shape of the fourth curved portion 221 changes with the shape of the first curved section 143, the semicircular portion 222 and the third circular arc portion 192 cooperate with the second curved portion 182 to form a semicircle with the same size and dimension, and the bottom of the preliminary bead 15 is located on the semicircular portion 222.
The second burring inserts 20 push the upper part of the preliminary rolling 15, i.e. the non-semicircular part of the preliminary rolling 15, further inwards, so that the preliminary rolling 15 of the object 1 is further curled inwards to form the desired rolling 16.
The invention has the beneficial effects that:
the method can realize the flanging and edge rolling modeling in a common stamping die without adding a special die; the cost is saved, the maintenance is convenient, and the safety performance is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a schematic cross-sectional view of a downward reshaping process of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention with the reshaping downward completed;
FIG. 3 is a schematic cross-sectional view of the upturn process of the present invention;
FIG. 4 is a schematic cross-sectional view of the upturn completion of the present invention;
FIG. 5 is a schematic cross-sectional view of the downward reshaping process of the present invention;
fig. 6 is a schematic cross-sectional view of the present invention after finishing downward reshaping.
Wherein: 1, manufacturing a workpiece; 11, flanging; 12, shaping an insert; 121 blank pressing part; 122 a conformal portion; 13 a first upper nip plate; 14 a first lower punch; 141 a first horizontal segment; 142 pits; 143 a first curved section; 15, preliminary rolling; 16 required rolling; 17, an upper male die; 171 a second arc portion; 172 a third curved portion; 18 pressing plates; 181 a first arc portion; 182 a second curved portion; 19 a first flanging insert; 191 a second horizontal segment; 192, a third arc segment; 20 second flanging insert; 21 a second upper nip plate; 22 a second lower punch; 221 a fourth curved portion; 222 semi-circular portion.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. 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 of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. 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 the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
A process method for flanging and rolling a cold stamping die comprises the following steps:
step one, shaping
Placing the workpiece 1 on the first lower male die 14, enabling one end of the workpiece 1 to be located at the horizontal part of the left end of the first lower male die 14, pressing the other end of the workpiece 1 by the first upper pressure plate 13, enabling the workpiece 1 to be fixed, and pressing the part, required to be turned and rolled, of the workpiece 1 into a shallow pit of the first lower male die 14 through the shaping insert 12 to form a turned edge 11, with the edge of the workpiece 1 facing upwards;
the forming R angle (the highest point of the forming pointed to the upper forming, i.e. the left end of the shallow pit of the first lower punch 14, specifically the intersection of the first horizontal section 141 and the concave pit 142) of the first lower punch 14 is 1mm, and the height of the flange (the initial part of the upward curling from the bottom of the shallow pit of the first lower punch 14 to the first bending section 143 of the first lower punch 14 after the forming) is equal to the required rounding radius R (tangency). It is noted that in principle the edge of the object 1 should not exceed the highest point of the indentation, i.e. it is most suitable to form a quarter-circle.
Step two, flanging upwards
Taking the workpiece 1 off the first lower punch 14 and then placing the workpiece on the lower pressure plate 18, pressing the workpiece 1 by using the upper punch 17 to fix the workpiece 1, placing the first flanging insert 19 at the bottom of the workpiece 1, connecting the right end of the first flanging insert 19 to the left end of the lower pressure plate 18 in a matching manner, and turning up the flanging 11 between the lower pressure plate 18 and the upper punch 17 to form a primary edge 15;
the first flanging insert 19 turns the bottom of the flanging 11 of the object 1 upwards, the turning height is equal to the required rolling radius R, and the turning shape is a circular arc. The forming R-angle (i.e. the junction of the second horizontal section 191 and the third arc portion 192) of the first flanging insert 19 is conventionally set to be 1mm, for example, if the flanging effect is not ideal due to the springback, the forming R-angle can be reduced to 0.5 mm.
Step three, shaping downwards
The workpiece 1 is taken down from the lower material pressing plate 18 and then placed on the second lower punch 22, the workpiece 1 is pressed by the second upper material pressing plate 21, so that the workpiece 1 is fixed, the right end of the second flanging insert 20 is connected to the left end of the second lower punch 22 in a matching manner, and at the moment, the preliminary rolling circle 15 of the workpiece 1 is further curled inwards by the second flanging insert 20 to form the required rolling circle 16.
The second flanging insert 20 is pressed downwards to enable the product 1 to curl inwards, and finally to be turned to be close to the slope part of the product 1, and the slope of the product 1 needs to be long enough to ensure the beginning of bending deformation and rolling.
The first lower punch 14 is a single piece and comprises a first horizontal section 141, a recess 142 and a first bending section 143, the object 1 is placed on the first lower punch 14, such that one end of the object 1 is located on the first horizontal section 141 at the left end of the first lower punch 14, and the other end of the object 1 is placed on the first bending section 143 across the recess 142.
The first bending section 143 changes with the shape of the part of the object 1 after crossing the concave 142, so that the part of the object 1 after crossing the concave 142 can be attached to the first bending section 143.
The reshaping insert 12 is a single piece and comprises an edge pressing part 121 and a mold following part 122, wherein the edge pressing part 121 presses the part of the product 1 which needs to be flanged and rounded, namely the part of the product 1 spanning the concave pit 142 into the concave pit 142 of the first lower male die 14, and the mold following part 122 changes with the change of the shape of the first bending section 143.
The upper male die 24 is a single piece and includes a first circular arc portion 181 and a second curved portion 182, and the shape of the second curved portion 182 changes with the shape of the first curved section 143.
The lower pressing plate 23 includes a second arc portion 171 and a third curved portion 172, the shape of the third curved portion 172 changes with the shape of the first curved portion 143, the portion of the object 1 other than the flange 11 is located between the third curved portion 172 and the second curved portion 182, and the flange 11 is located between the first arc portion 181 and the second arc portion 171.
The first flanging insert 19 is an integral piece and comprises a second horizontal section 191 and a third arc portion 192, wherein the third arc portion 192 is matched with the second bending portion 182 to form a semicircle, namely, the flanging 11 is turned upwards to form a preliminary bead 15, the bottom of the preliminary bead 15 is a semicircle, and the size of the semicircle formed by matching the third arc portion 192 with the second bending portion 182 are the same.
The second lower punch 22 is a single piece and comprises a fourth curved portion 221 and a semicircular portion 222, wherein the shape of the fourth curved portion 221 changes with the shape of the first curved section 143, the semicircular portion 222 and the third circular arc portion 192 cooperate with the second curved portion 182 to form a semicircle with the same size and dimension, and the bottom semicircle of the preliminary round 15 is located on the semicircular portion 222.
The second burring inserts 20 push the upper part of the preliminary rolling 15, i.e. the non-semicircular part of the preliminary rolling 15, further inwards, so that the preliminary rolling 15 of the object 1 is further curled inwards to form the desired rolling 16.
Although the preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, the scope of the present invention is not limited to the specific details of the above embodiments, and any person skilled in the art can substitute or change the technical solution of the present invention and its inventive concept within the technical scope of the present invention, and these simple modifications belong to the scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (9)
1. A process method for flanging and rolling a cold stamping die is characterized by comprising the following steps:
step one, shaping
Placing the workpiece (1) on a first lower male die (14) to enable one end of the workpiece (1) to be located at the horizontal part of the left end of the first lower male die (14), pressing the other end of the workpiece (1) by a first upper pressure plate (13) to enable the workpiece (1) to be fixed, and pressing the part, required to be turned and rounded, of the workpiece (1) into a shallow pit of the first lower male die (14) through a shaping insert (12) to form a turned edge (11) with an upward edge of the workpiece (1);
step two, flanging upwards
Taking down the workpiece (1) from the first lower punch (14), placing the workpiece on the lower pressure plate (18), pressing the workpiece (1) by using the upper punch (17), so that the workpiece (1) is fixed, then placing the first flanging insert (19) at the bottom of the workpiece (1), connecting the right end of the first flanging insert (19) at the left end of the lower pressure plate (18) in a matching manner, and turning up the flanging (11) positioned between the lower pressure plate (18) and the upper punch (17) to form a primary edge rolling (15);
step three, shaping downwards
The workpiece (1) is taken down from the lower material pressing plate (18) and then placed on the second lower male die (22), the workpiece (1) is pressed by the second upper material pressing plate (21), the workpiece (1) is fixed, the right end of the second flanging insert (20) is connected to the left end of the second lower male die (22) in a matched mode, and at the moment, the preliminary edge rolling (15) of the workpiece (1) is further curled inwards by the second flanging insert (20) to form the required edge rolling (16).
2. The process for flanging and rounding a cold stamping die according to claim 1, wherein the first lower male die (14) is a single piece and comprises a first horizontal section (141), a concave pit (142) and a first bending section (143), the product (1) is placed on the first lower male die (14) such that one end of the product (1) is located on the first horizontal section (141) at the left end of the first lower male die (14), and the other end of the product (1) is placed on the first bending section (143) across the concave pit (142).
3. The process for flanging and rounding a cold stamping die according to claim 2, wherein the first bending section (143) is changed along with the shape change of the part of the product (1) after crossing the concave pit (142), so that the part of the product (1) after crossing the concave pit (142) can be attached to the first bending section (143).
4. A process for cold stamping die flanging and rounding according to claim 3, characterized in that the shaping insert (12) is a single piece comprising a pressing portion (121) and a follower portion (122), wherein the pressing portion (121) presses the portion of the product (1) to be flanged and rounded into the recess (142) of the first lower punch (14).
5. The process for cold stamping die flanging and rounding according to claim 4, wherein the upper punch (24) is a single piece and comprises a first circular arc portion (181) and a second curved portion (182), and the shape of the second curved portion (182) changes with the shape of the first curved portion (143).
6. The process for flanging and rounding a cold stamping die according to claim 5, wherein the lower press plate (23) comprises a second circular arc portion (171) and a third curved portion (172), the shape of the third curved portion (172) changes with the shape of the first curved section (143), the portion of the object (1) other than the flanging (11) is located between the third curved portion (172) and the second curved portion (182), and the flanging (11) is located between the first circular arc portion (181) and the second circular arc portion (171).
7. The process for flanging and rounding a cold stamping die according to claim 6, wherein the first flanging insert (19) is a single piece and comprises a second horizontal section (191) and a third arc portion (192), wherein the third arc portion (192) is matched with the second bending portion (182) to form a semicircle, that is, the flanging (11) is turned upwards to form a preliminary rounding (15), and the bottom of the preliminary rounding (15) is a semicircle which is the same as the size and the size of the semicircle formed by matching the third arc portion (192) with the second bending portion (182).
8. The process for flanging and rounding a cold stamping die according to claim 7, characterized in that the second lower punch (22) is a single piece and comprises a fourth curved portion (221) and a semicircular portion (222), wherein the shape of the fourth curved portion (221) changes with the shape of the first curved section (143), the semicircular portion (222) and the third circular arc portion (192) and the second curved portion (182) cooperate to form a semicircle with the same size and dimension, and the bottom of the preliminary rounding (15) is located on the semicircular portion (222).
9. A process for cold stamping die flanging fillet according to claim 8, characterized in that the second flanging inserts (20) push the upper part of the preliminary bead (15), i.e. the non-semicircular part of the preliminary bead (15), further inwards, so that the preliminary bead (15) of the piece (1) is curled further inwards to form the desired bead (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010729074.4A CN111957787A (en) | 2020-07-27 | 2020-07-27 | Technological method for flanging and rolling cold stamping die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010729074.4A CN111957787A (en) | 2020-07-27 | 2020-07-27 | Technological method for flanging and rolling cold stamping die |
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| Publication Number | Publication Date |
|---|---|
| CN111957787A true CN111957787A (en) | 2020-11-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010729074.4A Pending CN111957787A (en) | 2020-07-27 | 2020-07-27 | Technological method for flanging and rolling cold stamping die |
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| CN (1) | CN111957787A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09295070A (en) * | 1996-05-10 | 1997-11-18 | Kanto Auto Works Ltd | Curling device |
| CN102151735A (en) * | 2010-12-06 | 2011-08-17 | 天津市津兆机电开发有限公司 | Process method for realizing product edge circle rolling in moulds |
| CN102513427A (en) * | 2011-11-25 | 2012-06-27 | 昌河飞机工业（集团）有限责任公司 | Round rolling forming method and moulds for long and thin metal plate part edges based on brake-press |
| CN104209407A (en) * | 2014-09-02 | 2014-12-17 | 昆山三景科技股份有限公司 | Automotive chassis stamping die |
| CN204953656U (en) * | 2015-05-28 | 2016-01-13 | 德清信丰机械有限公司 | Stamping die |
| CN208929015U (en) * | 2018-09-04 | 2019-06-04 | 沈阳飞机工业（集团）有限公司 | A kind of curling stamping die |
| CN210280382U (en) * | 2019-04-09 | 2020-04-10 | 四川燎原机械有限公司 | Elastic chain link ring mould |
| CN111167943A (en) * | 2020-01-15 | 2020-05-19 | 东莞市壬鼎模具有限公司 | Method for processing edge wrapping of inner edge of OLED backboard |
-
2020
- 2020-07-27 CN CN202010729074.4A patent/CN111957787A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09295070A (en) * | 1996-05-10 | 1997-11-18 | Kanto Auto Works Ltd | Curling device |
| CN102151735A (en) * | 2010-12-06 | 2011-08-17 | 天津市津兆机电开发有限公司 | Process method for realizing product edge circle rolling in moulds |
| CN102513427A (en) * | 2011-11-25 | 2012-06-27 | 昌河飞机工业（集团）有限责任公司 | Round rolling forming method and moulds for long and thin metal plate part edges based on brake-press |
| CN104209407A (en) * | 2014-09-02 | 2014-12-17 | 昆山三景科技股份有限公司 | Automotive chassis stamping die |
| CN204953656U (en) * | 2015-05-28 | 2016-01-13 | 德清信丰机械有限公司 | Stamping die |
| CN208929015U (en) * | 2018-09-04 | 2019-06-04 | 沈阳飞机工业（集团）有限公司 | A kind of curling stamping die |
| CN210280382U (en) * | 2019-04-09 | 2020-04-10 | 四川燎原机械有限公司 | Elastic chain link ring mould |
| CN111167943A (en) * | 2020-01-15 | 2020-05-19 | 东莞市壬鼎模具有限公司 | Method for processing edge wrapping of inner edge of OLED backboard |
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Application publication date: 20201120 |
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