CN114749553A - Technological method and compensation method for controlling contour dimension of top cover - Google Patents
Technological method and compensation method for controlling contour dimension of top cover Download PDFInfo
- Publication number
- CN114749553A CN114749553A CN202210263965.4A CN202210263965A CN114749553A CN 114749553 A CN114749553 A CN 114749553A CN 202210263965 A CN202210263965 A CN 202210263965A CN 114749553 A CN114749553 A CN 114749553A
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- die body
- upper die
- wedge
- flanging
- shaping
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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
- 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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- 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
Abstract
The invention relates to the technical field of dies, in particular to a process method and a compensation method for controlling the contour dimension of a top cover; the invention provides a mode for reducing sheet material flowing and pre-compensating, which solves the problem of contour dimension deviation of a top cover launder; the method comprises the following steps: a first step of drawing; the second procedure, trimming and shaping; a third procedure, namely, straight flanging and shaping; a fourth procedure, namely, flanging and shaping the inclined wedge: and a fifth step of trimming. After the fourth process is completed, the contour of the top cover is formed, the contour dimension of the finished product is the contour dimension of the finished product, and the contour deviation value is carried to the finished product. Therefore, the invention adopts the inclined material pressing plate and the drawing bead in the fourth step, and the method of troweling the convex bead of the drawing bead and pre-compensating is adopted, so as to achieve the purpose of solving the contour deviation; the invention avoids welding and processing, improves the quality of the die, reduces the manufacturing cost and saves the manufacturing period.
Description
Technical Field
The invention relates to the technical field of dies, in particular to a process method for controlling the contour dimension of a top cover.
Background
In the outer covering part of the automobile, the water flowing channel area of the lap joint position of the top cover and the back door has complex shape and high precision requirement of lap joint relation, and has high matching requirement of welding and integral assembly as the water flowing function area in the whole automobile. Meanwhile, because the existing automobile market is competitive, automobile manufacturers not only continuously improve the quality requirements, but also require that the tool development period is continuously shortened. In order to meet the requirements of product precision and matching and save the manufacturing period of the tool, the forming process of the area and the reason of the formation of the dimension deviation need to be researched, and the contour deviation of the roof gutter channel area is solved in the design stage.
In the traditional manufacturing method, after the debugging of the die is completed, the contour dimension of the water flowing groove area of the top cover is improved by carrying out later-stage re-processing on the dimension in a die welding or milling-reducing mode in an adjusting and modifying stage.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defects of easy finished product surface manufacturing, high secondary processing cost and long manufacturing period in the prior art, thereby providing a process method for controlling the contour dimension of the top cover.
The invention is realized by the following technical scheme
A process for controlling the contour dimension of a top cover comprises the following steps: a first step of drawing; the second procedure, trimming and shaping; a third procedure, namely, straight flanging and shaping; a fourth procedure, namely, flanging and shaping the inclined wedge: a fifth step of trimming; the fourth process determines the forming quality of the area, and the method adopts an inclined material pressing plate to press materials, so that the problem of shaping wrinkles can be effectively solved;
the fourth process specifically comprises the following steps: firstly, the filling wedge reaches a working position under the action of the driving wedge, the upper striking rod provides a power source for the main pressure plate, and the pressure process of the main pressure plate is finished along with the stroke release of the main pressure plate; the inclined material pressing plate and the flanging insert move downwards along with the upper die body, and the inclined material pressing plate begins to contact with the top cover plate material along with the compression process of the stroke of the nitrogen spring to play a material pressing role; and the flanging insert starts flanging and shaping work until the upper die body is contacted with the limiter on the lower die body, the upper die body reaches a bottom dead center, and the fourth process stamping process is finished.
Furthermore, the inclined material pressing plate is also provided with a drawing rib, so that the restraint on the plate material is further enhanced.
Further, the convex ribs of the drawing ribs of the upper die are leveled, and the pressure of the inclined material pressing plate on the plate is reduced.
Furthermore, the method also comprises the step of adding a wrinkle absorption rib shape in the reshaping area so as to solve the problem of wrinkles caused by the method.
A compensation method as in the above method, wherein in said step four, the profile of the roof launder section is pre-compensated.
Furthermore, the value range of the compensation value a is 0.4-0.8 mm.
Further, the offset a is 0.5 mm.
A cam flange sizing die structure, the structure comprising:
the die comprises an upper die body 1, wherein the working surface of the upper die body 1 is in an inward concave arc shape, an upper knockout pin 10 is arranged in the upper die body 1, the upper knockout pin 10 provides power for a main pressure plate 9 in the upper die body 1, the working surface of the upper die body 1 is also provided with an inclined groove, a nitrogen spring 8 is arranged in the groove, an inclined pressure plate 6 is arranged at the lower part of the nitrogen spring 8, a flanging insert 4 is arranged between the main pressure plate 9 and the inclined pressure plate 6, and a limiter 3 is also arranged in the upper die body 1;
the lower die comprises a lower die body 2, wherein the lower die body 2 is positioned below an upper die body 1, the working surface of the lower die body 2 is an outward convex arc shape which is complementary with the working surface of the upper die body 1, an inclined groove is formed in the lower die body 2, a driving wedge 11 is arranged in the inclined groove, a driving guide plate 12 is arranged on the inclined surface of the driving wedge 11, filling wedges 5 are arranged on most of the driving guide plates, a filling wedge guide plate 13 is arranged between each filling wedge 5 and the lower die body 2, a balance weight 7 is arranged between the upper part of each filling wedge 5 and the lower die body, a limiter 3 is further arranged in the lower die body 2, and the position of the limiter 3 of the lower die body 2 is symmetrical to the position of the limiter 3 of the upper die body 1;
a mechano-electronic device comprising a memory storing a computer program and an execution mechanism that, when executing the computer program, performs the steps of the method described above.
A computer readable storage medium storing computer instructions which, when executed by an execution mechanism, implement the steps of the method described above.
The technical scheme of the invention has the following advantages:
1. according to the method provided by the invention, through researching the stamping forming process and the size deviation forming principle of the finished piece in the water flowing groove area of the top cover, the size deviation problem caused by the movement of the sheet material is solved in the design stage, the rectification workload caused by the movement of the sheet material in the debugging production process is avoided, the welding and processing are avoided, the quality of the die is improved, the manufacturing cost is reduced, and the manufacturing period is saved.
2. According to the method provided by the invention, through the research on the numerical value of the play generated under the action force of the flanging wedge in the working process of the filling wedge, the contour deviation value caused by the play of the filling wedge is compensated in advance, the contour size is prevented from being rectified after the die is debugged, the manufacturing cost is reduced, the manufacturing period is saved, and the service life of the die is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of a header launder;
FIG. 2 is a sectional view of a wedge flanging sizing die structure;
FIG. 3 is a schematic view of roof gutter channel profile compensation;
FIG. 4 is a schematic view of a conventional wedge flanging and shaping;
FIG. 5 is a schematic view of a modified wedge flanging reshaping;
description of reference numerals:
1-upper die body; 2-lower die body; 3-a limiter;
4-flanging insert 5-filling wedge 6-inclined pressing plate
7-balance block 8-nitrogen spring 9-main pressure plate
10-upper knock rod 11-driving wedge 12-driving guide plate
13-filling wedge guide plate
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
Referring to fig. 1, the area shown in the figure is a shaping area involved in the present invention, and the shape of the gutter area behind the top cover is complicated, which determines that the product needs to be completed in steps during the stamping process.
A process for controlling the contour dimension of a top cover comprises the following steps: a first step of drawing; the second procedure, trimming and shaping; a third procedure, namely, straight flanging and shaping; a fourth procedure, namely, flanging and shaping the inclined wedge: a fifth step of trimming; wherein the work content of the fourth step determines the forming quality of this region. After the fourth process is completed, the contour of the top cover has been shaped. The contour dimension of the finished piece is the contour dimension of the final product, and contour deviation numerical values can be carried to the final product all the time, and the method adopts an inclined material pressing plate to press materials, so that the problem of shaping wrinkles can be effectively solved;
referring to fig. 2, from the analysis of the forming process of the top cover, after the first three steps are completed, the fourth step starts. When the die works, firstly, the filling wedge reaches a working position under the action of the driving wedge; the upper striking rod provides a power source for the main pressure plate, and the pressure process of the main pressure plate is finished along with the stroke release of the main pressure plate; the inclined material pressing plate and the flanging insert move downwards along with the upper die body, and the inclined material pressing plate begins to contact with the top cover plate material along with the compression process of the stroke of the nitrogen spring to play a material pressing role; and the flanging insert starts flanging and reshaping until the upper die body is contacted with the limiter on the lower die body, the upper die body reaches a bottom dead center, and the fourth process stamping process is finished.
Furthermore, the inclined material pressing plate is also provided with a drawing rib, so that the restraint on the plate material is further enhanced.
Referring to fig. 4, further, in the fourth step, when the sheet restraining force of the main pressing area is smaller than the restraining force of the outer oblique pressing area, the sheet of the main pressing area flows to cause dimensional deviation of the workpiece, and the draw bead of the upper die is smoothed to reduce the pressure of the oblique pressing plate on the sheet.
Referring to fig. 5, further, a wrinkle absorbing rib is added in the shaping area to solve the problem of wrinkles caused by the method.
A compensation method as in the above method, wherein in said step four, the profile of the roof launder section is pre-compensated.
Referring to fig. 3, the filling wedge is used as a reference of the stamping die, when a sheet starts to be formed, the filling wedge is in place under the action of the driving wedge, but in the working process, the flanging insert gives an acting force to the filling wedge when working, and theoretically, the filling wedge should not move under the action of the driving wedge and the filling wedge guide plate. However, in the actual production process, the filling wedge can move under the action of torque due to the tolerance and the existence of the guide gap. A deviation in the dimensions of the filling wedge following the play from the profile dimensions of the part will occur. The deviation is generated due to the die structure and cannot be solved in the production process, so that the problem is solved by a mode of performing pre-compensation in the design stage during the wedge flanging and shaping in the fourth process. The deviation numerical value is determined by the guide clearance of the guide plate and the rigidity of the filling wedge, and the outline of the flanging and shaping area of the fourth process wedge is compensated outwards through a large amount of data statistics and theoretical analysis so as to offset the outline deviation of a workpiece caused by the play of the filling wedge.
Furthermore, the value range of the compensation value a is 0.4-0.8 mm.
Further, the offset a is 0.5 mm.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Claims (10)
1. A process for controlling the contour dimension of a top cover is characterized by comprising the following steps: a first step of drawing; the second procedure, trimming and shaping; a third procedure, namely, straight flanging and shaping; a fourth procedure, namely, flanging and shaping the inclined wedge: a fifth step of trimming; in the method, an inclined material pressing plate is adopted for pressing materials;
the fourth process specifically comprises the following steps: firstly, the filling wedge reaches a working position under the action of the driving wedge, the upper striking rod provides a power source for the main pressure plate, and the pressure process of the main pressure plate is finished along with the stroke release of the main pressure plate; the inclined material pressing plate and the flanging insert move downwards along with the upper die body, and the inclined material pressing plate begins to contact with the top cover plate material along with the compression process of the stroke of the nitrogen spring to play a material pressing role; and the flanging insert starts flanging and shaping work until the upper die body is contacted with the limiter on the lower die body, the upper die body reaches a bottom dead center, and the fourth process stamping process is finished.
2. The method as claimed in claim 1, wherein the inclined pressing plate is further provided with a draw bead to further enhance the constraint on the plate.
3. The method of claim 2, wherein the draw bead of the upper die is smoothed to reduce the pressure of the inclined material pressing plate on the slab.
4. The method of claim 3, further comprising adding a wrinkle absorbing rib formation to the contoured region.
5. A compensation method according to the method of claim 1, characterized in that the profile of the roof launder section is pre-compensated in the fourth step.
6. The method of claim 5, wherein the offset a is in the range of 0.4-0.8 mm.
7. Method according to claim 6, characterized in that the offset a is 0.5 mm.
8. The utility model provides a slide wedge turn-ups sizing die structure which characterized in that, the structure includes:
the die comprises an upper die body (1), wherein the working surface of the upper die body (1) is concave arc-shaped, an upper striking rod (10) is arranged in the upper die body (1), the upper striking rod (10) provides power for a main pressure plate (9) in the upper die body (1), the working surface of the upper die body (1) is also provided with an inclined groove, a nitrogen spring (8) is arranged in the groove, the lower part of the nitrogen spring (8) is provided with an inclined pressure plate (6), a flanging insert (4) is arranged between the main pressure plate (9) and the inclined pressure plate (6), and a limiter (3) is also arranged in the upper die body (1);
a lower die body (2), the lower die body (2) is positioned below the upper die body (1), the working surface of the lower die body (2) is in a convex arc shape which is complementary with the working surface of the upper die body (1), an inclined groove is arranged on the lower die body (2), a driving inclined wedge (11) is arranged in the inclined groove, the inclined plane of the driving wedge (11) is provided with a driving guide plate (12), a plurality of driving guide plates are provided with filling wedges (5), a filling inclined wedge guide plate (13) is arranged between the filling inclined wedge (5) and the lower die body (2), a balance block (7) is arranged between the upper part of the filling wedge (5) and the lower die body, a limiter (3) is also arranged in the lower die body (2), and the position of the limiter (3) of the lower die body (2) is symmetrical to the limiter (3) of the upper die body (1).
9. A mechatronic device comprising a memory and an execution mechanism, the memory storing a computer program, characterized in that the execution mechanism is adapted to carry out the steps of the method according to any of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium storing computer instructions for implementing the steps of the method of any one of claims 1 to 7 when executed by an execution mechanism.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210263965.4A CN114749553A (en) | 2022-03-17 | 2022-03-17 | Technological method and compensation method for controlling contour dimension of top cover |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210263965.4A CN114749553A (en) | 2022-03-17 | 2022-03-17 | Technological method and compensation method for controlling contour dimension of top cover |
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| CN114749553A true CN114749553A (en) | 2022-07-15 |
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| CN202210263965.4A Pending CN114749553A (en) | 2022-03-17 | 2022-03-17 | Technological method and compensation method for controlling contour dimension of top cover |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115464049A (en) * | 2022-08-25 | 2022-12-13 | 中国第一汽车股份有限公司 | Wedge shaping method, electronic device and storage medium |
| CN115608854A (en) * | 2022-08-17 | 2023-01-17 | 中国第一汽车股份有限公司 | Technological method and mould for improving top cover antenna hole position surface product |
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Cited By (2)
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| CN115608854A (en) * | 2022-08-17 | 2023-01-17 | 中国第一汽车股份有限公司 | Technological method and mould for improving top cover antenna hole position surface product |
| CN115464049A (en) * | 2022-08-25 | 2022-12-13 | 中国第一汽车股份有限公司 | Wedge shaping method, electronic device and storage medium |
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