CN113926917A - Drawing and trimming composite die for automobile front floor and processing method thereof - Google Patents
Drawing and trimming composite die for automobile front floor and processing method thereof Download PDFInfo
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- CN113926917A CN113926917A CN202111160399.6A CN202111160399A CN113926917A CN 113926917 A CN113926917 A CN 113926917A CN 202111160399 A CN202111160399 A CN 202111160399A CN 113926917 A CN113926917 A CN 113926917A
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- 238000009966 trimming Methods 0.000 title claims abstract description 131
- 239000002131 composite material Substances 0.000 title claims abstract description 28
- 238000003672 processing method Methods 0.000 title claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 43
- 238000012545 processing Methods 0.000 claims abstract description 9
- 238000005520 cutting process Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 28
- 238000003825 pressing Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 238000011161 development Methods 0.000 abstract description 6
- 230000007847 structural defect Effects 0.000 abstract description 4
- 240000004282 Grewia occidentalis Species 0.000 description 8
- 150000001875 compounds Chemical class 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000013329 compounding Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Classifications
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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
- B21D37/08—Dies with different parts for several steps in a process
-
- 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
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/001—Shaping combined with punching, e.g. stamping and perforating
-
- 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
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
-
- 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
- B21D53/00—Making other particular articles
- B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention discloses a drawing and trimming composite die for an automobile front floor and a processing method thereof, wherein the drawing and trimming composite die comprises a drawing female die and a drawing male die which are arranged up and down, and a blank holder is arranged in the drawing male die; the drawing female die and the drawing male die are respectively provided with a trimming female die and a trimming male die which correspond to each other and are used for trimming four corners of a plate, the trimming male die is positioned in the blank holder, and the blank holder is provided with a through hole for the top of the trimming male die to pass through. The trimming die is integrated on the drawing die, so that the processing procedures are reduced, the structural defects of the front floor trimming and flanging composite die are overcome, the parts are not easy to generate cuttings and burrs, the quality robustness is high, the die processing and debugging requirements are low, the mass production condition of the die in the later period is stable, and the quality of the parts is effectively guaranteed. Compared with the three-procedure pre-floor process, the development of a set of stamping die is reduced, and the manufacturing cost of a set of die is saved.
Description
Technical Field
The invention relates to the technical field of automobile manufacturing, in particular to a drawing and trimming composite die for an automobile front floor and a processing method thereof.
Background
In recent years, with the negative growth of the Chinese automobile market, the superiority and inferiority among automobile manufacturers are accelerated, and in order to seize the initiative under the increasingly severe competitive environment, each automobile manufacturer promotes the application of a new process and a new technology in production by continuously creating in the development stage of new automobile types, so that the investment of the new automobile types and the production cost of a single trolley are reduced. At present, automobile panel parts are mainly produced by adopting a punch forming process. Stamping and forming typically requires the use of a two or more process combination to complete the part production. In the production cost of automobile stamping parts, the ratio of the development cost of a die to the use cost of a press to the total cost of parts is high. Therefore, the reduction of the development cost of the die and the use cost of the press by compressing the number of the part forming processes is one of the important ways for automobile manufacturers to reduce the cost of the whole automobile. The front floor serves as one of the automobile inner covering pieces and has the following characteristics: firstly, the integral modeling depth of the part is shallow, so the material inflow in the molding process is small, and secondly: as an automobile interior panel, the requirement for appearance quality is relatively low. Because the front floor has the characteristics of small inflow of materials, relatively low quality requirement and the like, the front floor parts can be compounded in the mould structure process on the basis of meeting the quality requirement, so that the production cost of the whole vehicle is reduced. In order to reduce the number of the processes of the front floor stamping die, domestic engineers have conducted intensive research on the stamping process and the die structure design of the front floor. The trimming and flanging compound die is designed based on the trimming and flanging compounding of the OP20 process by the Dongliang and the like, and meets the two-process punching process scheme of the front floor (Dongliang, high and valley dawn and the like. the trimming and flanging compound die for the front floor of the automobile is designed [ J ]. the die industry 2013, 02-0033-03). However, the structure of the composite die only remains in the trimming and flanging composite die in the OP20 process, and due to the structural defects of the composite die, the parts are easy to generate chips and burrs during trimming, so that the quality stability is poor.
Disclosure of Invention
The invention aims to solve the defects of the background technology and provides a drawing and trimming composite die for an automobile front floor and a processing method thereof, wherein the drawing and trimming composite die is used for compounding drawing and trimming process contents and ensuring the stable trimming quality.
In order to realize the purpose, the drawing and trimming composite die for the automobile front floor comprises a drawing female die and a drawing male die which are arranged up and down, wherein a blank holder is arranged in the drawing male die; the method is characterized in that: the drawing female die and the drawing male die are respectively provided with a trimming female die and a trimming male die which correspond to each other and are used for trimming four corners of a plate, the trimming male die is positioned in the blank holder, and the blank holder is provided with a through hole for the top of the trimming male die to pass through.
Furthermore, the drawing female die is respectively provided with one trimming female die at the position corresponding to the trimming of the four corners of the plate; and the drawing convex die is respectively provided with one trimming convex die at the position corresponding to the trimming of the four corners of the plate.
Further, the blank holders comprise a middle blank holder positioned in the middle of the drawing male die and used for pressing the surface of the middle part of the plate material and an outer blank holder positioned outside the drawing male die and used for pressing the surface of the outer side of the plate material, and the trimming male die is arranged between the middle blank holder and the outer blank holder.
Furthermore, a pushing structure used for pushing the outer side blank holder and the drawing female die in a pushing mode and avoiding the contact between the die cutting edge of the drawing female die and the die cutting edge of the drawing male die is arranged below the outer side blank holder.
Furthermore, the pushing structure comprises four pushing cylinders respectively arranged below the four corners of the outer side blank holder, and a piston rod of each pushing cylinder is connected with the bottom of the outer side blank holder.
Furthermore, the drawing female die and the drawing male die are respectively provided with a guide structure which is matched with each other and used for accurately matching the trimming female die with the trimming male die.
Furthermore, the guide structure comprises four guide sleeves and guide columns, the four guide sleeves are fixed in the drawing female die and positioned at four corners of the drawing female die, and the guide columns are fixed in the drawing male die and positioned at four corners of the drawing male die.
The processing method of the drawing and trimming composite die based on the automobile front floor comprises the following steps: placing the sheet material, moving the drawing female die downwards, pressing the middle surface of the sheet material by the matching of the drawing female die and the blank holder, performing drawing operation on the sheet material by the matching of the drawing female die and the drawing male die, continuously moving the drawing female die downwards, pressing the outer side surface of the sheet material by the matching of the drawing female die and the blank holder, performing trimming operation on four corners of the sheet material by the matching of the trimming female die and the trimming male die, moving the drawing female die upwards, and taking out the sheet material.
Further, the method for trimming the four corners of the plate by matching the trimming female die and the trimming male die comprises the following steps: the trimming male die adopts a trimming knife with an inclined top surface, the trimming female die adopts a trimming sleeve with a shaft hole matched with the trimming knife, and part of the edge of the top of the trimming knife enters the plate material into the trimming sleeve.
Furthermore, the height of the edge of the trimming blade entering the plate is 0.8 mm-1.2 mm.
The invention has the beneficial effects that: the trimming die is integrated on the drawing die, so that the processing procedures are reduced, the structural defects of the front floor trimming and flanging composite die are overcome, the parts are not easy to generate cuttings and burrs, the quality robustness is high, the die processing and debugging requirements are low, the mass production condition of the die in the later period is stable, and the quality of the parts is effectively guaranteed. Compared with the three-procedure pre-floor process, the development of a set of stamping die is reduced, and the manufacturing cost of a set of die is saved.
Drawings
FIG. 1 is a vertical sectional view of a drawing and trimming composite die for machining a sheet material of an automobile front floor according to the invention;
FIG. 2 is an enlarged view of i1 in FIG. 1;
FIG. 3 is an enlarged view of i2 in FIG. 1;
FIG. 4 is a layout diagram of the stamping process of the sheet material of the present invention;
FIG. 5 is an enlarged view of a portion a of FIG. 4;
FIG. 6 is a dimension view of the four corner trim of the present invention;
FIG. 7 is a cross-sectional view taken along line A-A of FIG. 6;
the device comprises a drawing female die, a drawing male die, a blank holder (3.1-middle blank holder, 3.2-outer blank holder), a plate material (4), a trimming female die (5), a trimming male die (6), a pushing cylinder (7), a guide sleeve (8), a guide column (9), a plate material line (10), a die parting line (11), a four-corner trimming line (12), a flanging contour line (13), a knife intersection point (14) and a drawing trimming line (15).
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments.
The drawing and trimming composite die shown in figures 1-7 comprises a drawing female die 1 and a drawing male die 2 which are arranged up and down, wherein a blank holder 3 is arranged in the drawing male die 2; the drawing female die 1 and the drawing male die 2 are respectively provided with a trimming female die 5 and a trimming male die 6 which are corresponding to each other and used for trimming four corners of the sheet material 4, the trimming male die 6 is positioned in the blank holder 3, and the blank holder 3 is provided with a through hole for the top of the trimming male die 6 to pass through. The blank holder 3 comprises a middle blank holder 3.1 which is positioned in the middle of the drawing male die 2 and used for pressing the surface of the middle part of the plate 4 and an outer blank holder 3.2 which is positioned outside the drawing male die 2 and used for pressing the surface of the outer side of the plate 4, and the trimming male die 6 is arranged between the middle blank holder 3.1 and the outer blank holder 3.2. The pushing structure is arranged below the outer side blank holder 3.2 and comprises four pushing cylinders 7 respectively arranged below four corners of the outer side blank holder 3.2, and piston rods of the pushing cylinders 7 are connected with the bottom of the outer side blank holder 3.2.
The drawing female die 1 and the drawing male die 2 are respectively provided with guide structures which are matched with each other and used for enabling the trimming female die 5 to be accurately matched with the trimming male die 6, and the guide structures comprise four guide sleeves 8 and guide columns 9, wherein the four guide sleeves are fixed in the drawing female die 1 and positioned at four corners of the drawing female die 1, and the guide columns 9 are fixed in the drawing male die 2 and positioned at four corners of the drawing male die 2.
The stamping process design:
in order to ensure the strength of the die, the detail of the trimming contour process dimension is shown in FIG. 6, and the following design is satisfied: the flanging radius R of the flanging contour line 13 of the part and the tangent point of the four-corner trimming line 12 are taken as the basis, the length b is inwards extended, and the size of b is 25mm, so that the local strength of the material pressing ring 3 in the four-corner trimming process is ensured.
Based on the flanging radius R of a flanging contour line 13 of a part and the tangent point of a four-corner trimming line 12, the length c is extended outwards, the outer end point of c is extended outwards by a length d which is 2mm longer than the trimming intersection point of a drawing trimming knife and the four-corner trimming knife, and the purpose is to ensure that the trimming jointing knives of the drawing process and the trimming process are sufficient.
The dimension e in the width direction of the four-corner trimming line 12 is 5mm, and the purpose is to consider that the trimming line is unilateral trimming, so that the structural stability of the trimming insert subjected to lateral force is ensured.
Considering the processability of the trimming female die 5 and the material pressing ring 3, a fillet R is required, and the minimum R size is 5 mm.
And (3) processing a local parting line: in order to ensure the strength of the local blank holder 3, the dimension of the distance f between the four-corner trimming line 12 and the parting line 11 of the drawing die is 30 mm.
The "punch tongue (i.e. trimming scrap attached to the panel 4, same below)" trimming edge insertion g, g is 1mm in size.
The 'tongue-punching' trimming avoidance amount h is 1 mm.
The working process of the die comprises the following steps: the working process of the drawing and trimming compound die has the working processes of a drawing die and a trimming die, namely when the content of the drawing process is about to be finished, the content of a local trimming process is carried out. When the drawing female die is bottomed, the contents of the drawing process and the trimming process are completed simultaneously, and the main working process of the die is as follows:
when the distance between the drawing female die 1 and the forming bottom is 40mm, the drawing female die 1 is meshed with the middle blank holder 3.1, the drawing female die 1 continues to move downwards, and the plate 4 starts to be drawn and formed; when the drawing female die 1 is 1mm away from the bottom of the stroke, the trimming male die 6 starts to contact the sheet material 4, the outer side blank holder 3.2 plays a role of pressing the sheet material relative to trimming work, the trimming male die 6 punches into the trimming female die 5 along with the continuous downward movement of the drawing female die 1, and the four corners of the sheet material 4 are trimmed. When the drawing concave die 1 moves to the bottom of the stroke, the contents of the drawing and trimming processes are finished.
According to the invention, the trimming die is integrated on the drawing die, so that the processing procedures are reduced, the structural defects of the front floor trimming and flanging composite die are overcome, the parts are not easy to generate cuttings and burrs, the quality stability is high, the die processing and debugging requirements are low, the mass production condition of the die in the later stage is stable, and the quality of the parts is effectively ensured. Compared with the three-procedure pre-floor process, the development of a set of stamping die is reduced, and the manufacturing cost of a set of die is saved.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the structure of the present invention in any way. Any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still fall within the scope of the technical solution of the present invention.
Claims (10)
1. A drawing and trimming composite die for an automobile front floor comprises a drawing female die (1) and a drawing male die (2) which are arranged up and down, wherein a blank holder (3) is arranged in the drawing male die (2); the method is characterized in that: the drawing female die (1) and the drawing male die (2) are respectively provided with a trimming female die (5) and a trimming male die (6) which correspond to each other and are used for trimming four corners of a plate (4), the trimming male die (6) is positioned in the blank holder (3), and the blank holder (3) is provided with a through hole for the top of the trimming male die (6) to pass through.
2. The drawing and trimming composite die for the automobile front floor as claimed in claim 1, wherein: the drawing female die (1) is provided with one trimming female die (5) at the position corresponding to the trimming of the four corners of the plate (4); the drawing convex die (2) is provided with one trimming convex die (6) at the position corresponding to the trimming of the four corners of the plate material (4).
3. The drawing and trimming composite die for the automobile front floor as claimed in claim 2, wherein: the blank holder (3) comprises a middle blank holder (3.1) located in the middle of the drawing male die (2) and used for pressing the surface of the middle of the plate (4) and an outer blank holder (3.2) located on the outer side of the drawing male die (2) and used for pressing the surface of the outer side of the plate (4), and the trimming male die (6) is arranged between the middle blank holder (3.1) and the outer blank holder (3.2).
4. The drawing and trimming composite die for the automobile front floor as claimed in claim 3, wherein: and a pushing structure used for pushing the outer side blank holder (3.2) and the drawing female die (1) and preventing the die cutting edge of the drawing female die (1) from contacting with the die cutting edge of the drawing male die (2) is arranged below the outer side blank holder (3.2).
5. The drawing and trimming composite die for the automobile front floor as claimed in claim 4, wherein: the pushing structure comprises four pushing cylinders (7) which are arranged below four corners of the outer side blank holder (3.2) respectively, and piston rods of the pushing cylinders (7) are connected with the bottom of the outer side blank holder (3.2).
6. The drawing and trimming composite die for the automobile front floor as claimed in claim 2, wherein: the drawing female die (1) and the drawing male die (2) are respectively provided with guide structures which are matched with each other and used for enabling the trimming female die (5) to be accurately matched with the trimming male die (6).
7. The drawing and trimming composite die for the automobile front floor as claimed in claim 6, wherein: the guide structure comprises four guide sleeves (8) which are fixed in the drawing female die (1) and positioned at four corners of the drawing female die (1) and guide columns (9) which are fixed in the drawing male die (2) and positioned at four corners of the drawing male die (2).
8. A processing method of a drawing and trimming composite die for an automobile front floor is characterized by comprising the following steps: placing a sheet material (4), moving a drawing female die (1) downwards, matching the drawing female die (1) with a blank holder (3) to press the middle surface of the sheet material (4), matching the drawing female die (1) with a drawing male die (2) to draw the sheet material (4), continuing moving the drawing female die (1) downwards, matching the drawing female die (1) with the blank holder (3) to press the outer side surface of the sheet material (4), matching a trimming female die (5) with a trimming male die (6) to perform trimming operation on four corners of the sheet material (4), moving the drawing female die (1) upwards, and taking out the sheet material (4).
9. The method for processing the drawing and trimming composite die for the automobile front floor as claimed in claim 8, wherein the drawing and trimming composite die comprises the following steps: the method for trimming the four corners of the plate (4) by matching the trimming female die (5) with the trimming male die (6) comprises the following steps: the trimming male die (6) is a trimming knife with an inclined top surface, the trimming female die (5) is a trimming sleeve with a shaft hole matched with the trimming knife, and part of the top edge of the trimming knife enters the plate (4) and enters the trimming sleeve.
10. The method for processing the drawing and trimming composite die for the automobile front floor as claimed in claim 9, wherein: the height of the edge of the trimming knife entering the plate (4) is 0.8 mm-1.2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111160399.6A CN113926917B (en) | 2021-09-30 | 2021-09-30 | Drawing and trimming composite die for automobile front floor and processing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111160399.6A CN113926917B (en) | 2021-09-30 | 2021-09-30 | Drawing and trimming composite die for automobile front floor and processing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113926917A true CN113926917A (en) | 2022-01-14 |
| CN113926917B CN113926917B (en) | 2023-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111160399.6A Active CN113926917B (en) | 2021-09-30 | 2021-09-30 | Drawing and trimming composite die for automobile front floor and processing method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN113926917B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023241311A1 (en) * | 2022-06-17 | 2023-12-21 | 浙江吉利控股集团有限公司 | Mold capable of processing front floors having different wheelbases |
| WO2024124332A1 (en) * | 2022-12-12 | 2024-06-20 | Magna International Inc. | Method for trimming blanks |
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| JPH04178225A (en) * | 1990-11-09 | 1992-06-25 | Nissan Motor Co Ltd | Die for drawing press |
| JPH079045A (en) * | 1993-06-23 | 1995-01-13 | Mazda Motor Corp | Pressing device |
| CN102513445A (en) * | 2011-11-30 | 2012-06-27 | 长城汽车股份有限公司 | Trimming and flanging composite stamping die |
| CN104511535A (en) * | 2014-10-16 | 2015-04-15 | 上海众大汽车配件有限公司 | Mould of automobile door reinforcing plate assembly component |
| CN106077270A (en) * | 2016-07-05 | 2016-11-09 | 上海众大汽车配件有限公司 | A kind of mould of front door of automobile waling part |
| CN207343582U (en) * | 2017-08-18 | 2018-05-11 | 浙江长兴层颉机械制造有限公司 | A kind of automobile side coaming stamping die |
| CN208743486U (en) * | 2018-07-18 | 2019-04-16 | 重庆捷曜冲压科技有限公司 | Vehicle dormer window stiffening plate drawing die |
-
2021
- 2021-09-30 CN CN202111160399.6A patent/CN113926917B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04178225A (en) * | 1990-11-09 | 1992-06-25 | Nissan Motor Co Ltd | Die for drawing press |
| JPH079045A (en) * | 1993-06-23 | 1995-01-13 | Mazda Motor Corp | Pressing device |
| CN102513445A (en) * | 2011-11-30 | 2012-06-27 | 长城汽车股份有限公司 | Trimming and flanging composite stamping die |
| CN104511535A (en) * | 2014-10-16 | 2015-04-15 | 上海众大汽车配件有限公司 | Mould of automobile door reinforcing plate assembly component |
| CN106077270A (en) * | 2016-07-05 | 2016-11-09 | 上海众大汽车配件有限公司 | A kind of mould of front door of automobile waling part |
| CN207343582U (en) * | 2017-08-18 | 2018-05-11 | 浙江长兴层颉机械制造有限公司 | A kind of automobile side coaming stamping die |
| CN208743486U (en) * | 2018-07-18 | 2019-04-16 | 重庆捷曜冲压科技有限公司 | Vehicle dormer window stiffening plate drawing die |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023241311A1 (en) * | 2022-06-17 | 2023-12-21 | 浙江吉利控股集团有限公司 | Mold capable of processing front floors having different wheelbases |
| WO2024124332A1 (en) * | 2022-12-12 | 2024-06-20 | Magna International Inc. | Method for trimming blanks |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113926917B (en) | 2023-12-19 |
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