CN113926917B - 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 PDF

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Publication number
CN113926917B
CN113926917B CN202111160399.6A CN202111160399A CN113926917B CN 113926917 B CN113926917 B CN 113926917B CN 202111160399 A CN202111160399 A CN 202111160399A CN 113926917 B CN113926917 B CN 113926917B
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China
Prior art keywords
trimming
die
female die
plate
blank holder
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CN202111160399.6A
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CN113926917A (en
Inventor
马培兵
王龙
王大鹏
蒋磊
沈军奇
张明
李国伟
张淳波
袁璐
张雄飞
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Dongfeng Honda Automobile Co Ltd
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Dongfeng Honda Automobile Co Ltd
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Priority to CN202111160399.6A priority Critical patent/CN113926917B/en
Publication of CN113926917A publication Critical patent/CN113926917A/en
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Publication of CN113926917B publication Critical patent/CN113926917B/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00Tools as parts of machines covered by this subclass
    • B21D37/08Dies with different parts for several steps in a process
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D35/00Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
    • B21D35/001Shaping combined with punching, e.g. stamping and perforating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D35/00Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
    • B21D35/002Processes combined with methods covered by groups B21D1/00 - B21D31/00
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00Making other particular articles
    • B21D53/88Making 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 trimming composite die for an automobile front floor and a processing method thereof, comprising 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 drawing die and the drawing punch are respectively provided with a trimming die and a trimming punch which correspond to each other and are used for trimming four corners of a plate, the trimming punch is positioned in the blank holder, and the blank holder is provided with a through hole for the top of the trimming punch to pass through. The trimming die is integrated on the drawing die, so that the processing procedure is reduced, the structural defect of the front floor trimming and flanging composite die is overcome, chips and burrs are not easy to generate on parts, the quality robustness is high, the die processing and debugging requirements are low, the production condition of the die quantity in the later stage is stable, and the quality of the parts is effectively ensured. Compared with the three-process pre-floor process, the development of one set of stamping die is reduced, and the manufacturing cost of one set of die is saved.

Description

Drawing and trimming composite die for automobile front floor and processing method thereof
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, along with the negative growth of the Chinese automobile market, the superior and inferior among automobile manufacturers are accelerated, and in order to preempt initiative in an increasingly severe competitive environment, each large automobile manufacturer is continuously innovated in a new automobile development stage to promote the application of new technology and new technology in production, so that the investment of new automobile types and the production cost of single automobile are reduced. At present, automobile panel parts are mainly produced by adopting a stamping forming process. Stamping typically requires two or more processes to complete the part production. In the production cost of the automobile stamping parts, the ratio of the development cost of the die to the use cost of the press to the total cost of the parts is high. Therefore, reducing the mold development cost and the press use cost by compressing the number of part forming processes is one of the important ways for automobile manufacturers to reduce the overall cost. The front floor is used as one of the automobile inner covering parts, and has the characteristics that: first, the whole molding degree of depth of part is shallower, so its in-process material inflow is less, second: as an automotive inner panel, the requirements for external quality are relatively low. Because the front floor material flows in little, the quality requirement is relatively low etc. characteristics, therefore the front floor part can carry out the compound of the mould structure process on the basis of meeting the quality requirement to reduce the production cost of the whole car. In order to reduce the number of processes of stamping the front floor, domestic engineers have conducted intensive researches on the stamping process and the structural design of the front floor. Dong Liguang and the like design a trimming and flanging compound die based on trimming and flanging compound operation of the OP20 process, and meet the two-process stamping process scheme of a front floor (Dong Liguang, high, gu Xiaoyu and the like. Design of the trimming and flanging compound die of the automobile front floor [ J ]. Die industry 2013, 02-0033-03). However, the composite die structure is only remained in the trimming and flanging composite die in the OP20 working procedure, and the trimming and flanging composite die has the defects of easy chip and burr generation and poor quality robustness when a part is trimmed, and meanwhile, the composite die has extremely high requirements on die processing and debugging, the production condition of the die quantity in the later stage is extremely unstable, and the quality of the part is difficult to ensure effectively.
Disclosure of Invention
The invention aims to solve the defects of the background technology and provides a drawing and trimming composite die for a front floor of an automobile, which is used for compositing the contents of drawing and trimming procedures and ensuring the stable trimming quality, and a processing method thereof.
The invention provides a drawing and trimming composite die for an automobile front floor, which 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 die and the drawing punch are respectively provided with a trimming die and a trimming punch which correspond to each other and are used for trimming four corners of a plate, the trimming punch is positioned in the blank holder, and the blank holder is provided with a through hole for the top of the trimming punch to pass through.
Further, the drawing female die is respectively provided with one trimming female die at the positions corresponding to the trimming of the four corners of the plate; the drawing male dies are respectively provided with one trimming male die at positions corresponding to trimming of four corners of the plate.
Further, the blank holder comprises a middle blank holder which is positioned in the middle of the drawing punch and used for pressing the middle surface of the plate material, and an outer blank holder which is positioned at the outer side of the drawing punch and used for pressing the outer surface of the plate material, and the trimming punch is arranged between the middle blank holder and the outer blank holder.
Further, a pushing structure for pushing the outer side blank holder and the drawing female die and preventing the die cutting edge of the drawing female die from contacting with the die cutting edge of the drawing male die is arranged below the outer side blank holder.
Further, the pushing structure comprises four pushing cylinders which are respectively arranged below four corners of the outer side blank holder, and piston rods of the pushing cylinders are connected with the bottom of the outer side blank holder.
Furthermore, guide structures which are matched with each other and used for enabling the trimming female die to be accurately matched with the trimming male die are respectively arranged on the drawing female die and the drawing male die.
Further, the guide structure comprises four guide sleeves which are fixed in the drawing female die and positioned at four corners of the drawing female die, and guide columns which 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 a plate, moving down a drawing female die, pressing the middle surface of the plate by matching the drawing female die with a blank holder, drawing the plate by matching the drawing female die with a drawing male die, continuing moving down the drawing female die, pressing the outer surface of the plate by matching the drawing female die with the blank holder, trimming four corners of the plate by matching a trimming female die with a trimming male die, moving up the drawing female die, and taking out the plate.
Further, the method for trimming four corners of the plate by matching the trimming female die with the trimming male die comprises the following steps: the trimming male die adopts a trimming cutter with an inclined surface on the top surface, the trimming female die adopts a trimming sleeve with a shaft hole matched with the trimming cutter, and the top part of the trimming cutter is cut into the plate material to enter the trimming sleeve.
Further, the height of the trimming blade into the plate material is 0.8 mm-1.2 mm.
The beneficial effects of the invention are as follows: the trimming die is integrated on the drawing die, so that the processing procedure is reduced, the structural defect of the front floor trimming and flanging composite die is overcome, chips and burrs are not easy to generate on parts, the quality robustness is high, the die processing and debugging requirements are low, the production condition of the die quantity in the later stage is stable, and the quality of the parts is effectively ensured. Compared with the three-process pre-floor process, the development of one set of stamping die is reduced, and the manufacturing cost of one set of die is saved.
Drawings
FIG. 1 is a vertical cross-sectional view of a drawing and trimming composite die processing plate for an automobile front floor;
FIG. 2 is an enlarged view of i1 of FIG. 1;
FIG. 3 is an enlarged view of i2 of FIG. 1;
FIG. 4 is a layout of a stamping process for a sheet material in accordance with the present invention;
FIG. 5 is an enlarged view of FIG. 4 at a;
FIG. 6 is a dimensional view of four corner trimmings in accordance with the invention;
FIG. 7 is a cross-sectional view A-A of FIG. 6;
the drawing die comprises a drawing die, a drawing punch, a 3-blank holder (3.1-middle blank holder, 3.2-outer blank holder), a 4-plate, a 5-trimming die, a 6-trimming punch, a 7-pushing cylinder, an 8-guide sleeve, a 9-guide post, a 10-plate material line, an 11-parting line, a 12-four corner trimming line, a 13-flanging profile line, a 14-intersecting knife point and a 15-drawing trimming line.
Detailed Description
The invention will now be described in further detail with reference to the drawings and to specific examples.
The drawing 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 mutually corresponding and used for trimming four corners of the plate 4, the trimming male die 6 is positioned in the blank holder 3, and a through hole for the top of the trimming male die 6 to pass through is formed in the blank holder 3. The blank holder 3 comprises a middle blank holder 3.1 positioned in the middle of the drawing punch 2 and used for pressing the middle surface of the plate 4, and an outer blank holder 3.2 positioned outside the drawing punch 2 and used for pressing the outer surface of the plate 4, and the trimming punch 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 pressing edge ring 3.2 and comprises four pushing cylinders 7 which are respectively arranged below four corners of the outer side pressing edge ring 3.2, and piston rods of the pushing cylinders 7 are connected with the bottom of the outer side pressing edge ring 3.2.
The drawing female die 1 and the drawing male die 2 are respectively provided with a guide structure which is matched with each other and is used for enabling the trimming female die 5 to be matched with the trimming male die 6 accurately, and the guide structure comprises four guide sleeves 8 which are fixed in the drawing female die 1 and are positioned at four corners of the drawing female die 1, and guide posts 9 which are fixed in the drawing male die 2 and are positioned at four corners of the drawing male die 2.
And (3) stamping process design:
in order to ensure the strength of the die, the detail of the trimming outline process is shown in fig. 6, and the following design is satisfied: the inward extension length b, is 25mm based on the tangent point of the flanging radius R of the flanging profile 13 of the part and the four-corner trimming line 12, so as to ensure the local strength of the pressing ring 3 in the four-corner trimming process.
The outer end points of the lengths c and c are extended outwards by 2mm compared with the trimming intersection point of the drawing trimming knife and the four-corner trimming knife on the basis of the tangent points of the flanging radius R of the flanging profile line 13 of the part and the four-corner trimming line 12, and the length d is 2mm, so that the full trimming joint of the drawing process and the trimming process is ensured.
The four corner trimming lines 12 have a width dimension e, e of 5mm, the purpose of which is to ensure structural stability against lateral forces exerted by the trimming insert, taking account of the single-sided trimming.
Considering workability of the trimming die 5 and the pressing ring 3, a rounded corner R is required, and the R size is at least 5mm.
And (3) processing a local parting line: in order to secure the strength of the partial bead 3, the size of the space f between the quadrangular trimming line 12 and the parting line 11 of the drawing die is 30mm.
The size of the trimming blade amount g, g of the trimming tongue (namely, the trimming waste is attached to the plate material 4 and the same as the lower part) is 1mm.
The dimension of the trimming avoidance amount h of the tongue punching is 1mm.
The working process of the die comprises the following steps: the working process of the drawing trimming compound die has the working processes of the drawing die and the trimming die, namely, the drawing process is about to be completed, and the local trimming process is carried out. When the drawing female die is at bottom, the drawing process content and the trimming process content are finished simultaneously, and the main working process of the die is as follows:
when the distance between the drawing die 1 and the forming bottom is 40mm, the drawing die 1 is meshed with the middle blank holder 3.1, the drawing die 1 continues to move downwards, and the sheet material 4 starts to be drawn and formed; when the drawing female die 1 is 1mm away from the stroke bottom, the trimming male die 6 starts to contact the plate material 4, at the moment, the outer side edge pressing ring 3.2 plays a role in pressing materials in relative trimming work, and as the drawing female die 1 continues to move downwards, the trimming male die 6 is punched into the trimming female die 5, and four corners of the plate material 4 begin to be trimmed. When the drawing die 1 moves to the bottom of the stroke, the drawing and trimming procedures are completed.
According to the invention, the trimming die is integrated on the drawing die, so that the processing procedures are reduced, the structural defect of the front floor trimming and flanging composite die is overcome, the chips and burrs are not easy to generate on parts, the quality robustness is high, the die processing and debugging requirements are low, the production condition of the die quantity in the later stage is stable, and the quality of the parts is effectively ensured. Compared with the three-process pre-floor process, the development of one set of stamping die is reduced, and the manufacturing cost of one set of die is saved.
The above description is only of 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 variation and modification of the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.

Claims (8)

1. The drawing and trimming composite die for the 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 die (1) and the drawing punch (2) are respectively provided with a trimming die (5) and a trimming punch (6) which are mutually corresponding and are used for trimming four corners of a plate (4), the trimming punch (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 punch (6) to pass through; the drawing female die (1) is respectively provided with a trimming female die (5) at the positions corresponding to the trimming of the four corners of the plate (4); the drawing male die (2) is respectively provided with a trimming male die (6) at the positions corresponding to the trimming of the four corners of the plate (4); the edge pressing ring (3) comprises a middle edge pressing ring (3.1) positioned in the middle of the drawing punch (2) and used for pressing the middle surface of the plate material (4) and an outer edge pressing ring (3.2) positioned at the outer side of the drawing punch (2) and used for pressing the outer side surface of the plate material (4), and the trimming punch (6) is arranged between the middle edge pressing ring (3.1) and the outer edge pressing ring (3.2); the trimming male die (6) adopts a trimming cutter with an inclined surface, and the trimming female die (5) adopts a trimming sleeve with a shaft hole matched with the trimming cutter.
2. The composite die for drawing and trimming the front floor of the automobile as claimed in claim 1, wherein: and a pushing structure 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).
3. The composite die for drawing and trimming the front floor of the automobile as claimed in claim 2, wherein: the pushing structure comprises four pushing cylinders (7) which are respectively arranged below four corners of the outer side edge pressing ring (3.2), and piston rods of the pushing cylinders (7) are connected with the bottom of the outer side edge pressing ring (3.2).
4. The composite die for drawing and trimming the front floor of the automobile as claimed in claim 1, wherein: 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) are respectively arranged on the drawing female die (1) and the drawing male die (2).
5. The composite die for drawing and trimming the front floor of the automobile as claimed in claim 4, 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).
6. A method for processing a drawing and trimming composite die based on the automobile front floor as claimed in any one of claims 1 to 5, which is characterized in that: comprising the following steps: placing a plate (4), moving down a drawing female die (1), pressing the middle surface of the plate (4) by matching the drawing female die (1) with a middle blank holder (3.1), drawing the plate (4) by matching the drawing female die (1) with a drawing male die (2), continuing to move down the drawing female die (1), pressing the outer surface of the plate (4) by matching the drawing female die (1) with an outer blank holder (3.2), trimming four corners of the plate (4) by matching the trimming female die (5) with a trimming male die (6), and moving up the drawing female die (1) to take out the plate (4).
7. The method for processing the drawing and trimming composite die for the automobile front floor as claimed in claim 6, wherein the method comprises the following steps: the method for trimming 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) adopts a trimming cutter with an inclined surface, the trimming female die (5) adopts a trimming sleeve with a shaft hole matched with the trimming cutter, and the top part of the trimming cutter is cut into the plate (4) to enter the trimming sleeve.
8. The method for processing the drawing and trimming composite die for the automobile front floor as claimed in claim 7, wherein: the height of the trimming blade into the plate material (4) is 0.8 mm-1.2 mm.
CN202111160399.6A 2021-09-30 2021-09-30 Drawing and trimming composite die for automobile front floor and processing method thereof Active CN113926917B (en)

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

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CN113926917A CN113926917A (en) 2022-01-14
CN113926917B true CN113926917B (en) 2023-12-19

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114951436A (en) * 2022-06-17 2022-08-30 浙江吉利控股集团有限公司 Mold capable of processing front floors with different wheelbases

Citations (7)

* Cited by examiner, † Cited by third party
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

Patent Citations (7)

* Cited by examiner, † Cited by third party
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

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