Multi-pressing-core die structure of automobile front top outer plate

Abstract

The utility model discloses a multi-material-pressing-core die structure of an automobile front top outer plate, which comprises a lower die holder, a lower pressing core, a lower pressing core, a lower pressing core, a lower pressing core and a lower pressing core, and is characterized in that the lower die holder is provided with a lower male die for mounting and placing the automobile front top outer plate; the upper die holder is provided with an inner cavity and a shaping insert group corresponding to the lower male die, and the shaping insert group is located in the inner cavity and divides the inner cavity into at least two independent sub-cavities; material pressing cores are respectively arranged in the sub-cavities, and the material pressing cores are arranged adjacently; nitrogen springs are arranged between the material pressing cores and the upper die base, and the material pressing force of the material pressing cores is adjusted through the nitrogen springs. The upper die base moves downwards relative to the lower die base, and the material pressing cores in the independent sub-cavities act on all parts of the automobile front top outer plate respectively. According to the technical scheme, the structure is simple, manufacturing is easy and convenient, implementation is easy, cost is low, and the problem that the shaping quality of an automobile front top outer plate is unqualified due to the fact that an existing single material pressing core structure is adopted for machining can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, and particularly relates to a multi-pressure core mold structure for an outer panel of a front roof of an automobile. Background Art

[0002] During the automobile manufacturing process, as an appearance part, the shaping of the outer panel of the front roof of an automobile is a key process. The existing covering parts are large in size, mostly complex curved surfaces, and there are certain height differences at various local positions of the surface. When facing such covering parts with the traditional single-pressure core mold structure, the following problems usually exist: First, it is difficult for a single-pressure core to effectively press the covering part completely, and when adjusting the blank holding force of the single-pressure core, it can only be adjusted as a whole, resulting in uneven pressure on each local position of the covering part, and the compressive stress is concentrated on one of the local positions of the lower punch and the covering part. The concentrated part of the lower punch is extremely easy to be worn, affecting the service life of the mold. The covering part may warp, and not only are quality problems such as wrinkling and cracking likely to occur in the finished product after shaping, but also slippage often occurs during the shaping process. Second, due to the large size of the covering part, the overall weight of a single-pressure core is relatively high, the disassembly and assembly difficulty is high, it is not easy to replace and maintain, and the maintenance cost is high. Third, if a new product needs to be developed, the extremely large single-pressure core structure can only be replaced and scrapped accordingly, and the scrapping cost is high. Summary of the Utility Model

[0003] The utility model provides a multi-pressure core mold structure for an outer panel of a front roof of an automobile, which has a simple structure, is easy to manufacture, easy to implement and has low cost, and can effectively solve the problem that the shaping quality of the outer panel of the front roof of an automobile is unqualified when processed by using the existing single-pressure core structure. The main technical solutions are as follows:

[0004] A multi-pressure core mold structure for an outer panel of a front roof of an automobile, including a lower die base, which has a lower punch for mounting and placing the outer panel of the front roof of an automobile; an upper die base, which is provided with an inner cavity and a shaping insert group corresponding to the lower punch. The shaping insert group is located inside the inner cavity and divides the inner cavity into at least two independent sub-cavities; pressure cores are respectively installed in the sub-cavities, and the pressure cores are arranged adjacent to each other; nitrogen springs are respectively arranged between each pressure core and the upper die base, and the pressure of each pressure core is adjusted through the nitrogen spring; when the upper die base moves downward relative to the lower die base, the pressure cores in each independent sub-cavity respectively act on each local part of the outer panel of the front roof of an automobile, and the outer panel of the front roof of an automobile is integrally pressed onto the lower punch.

[0005] Preferably, the shaping insert group includes a mounting table and an insert fixed above the mounting table. The mounting table is arranged inside the inner cavity and divides the inner cavity into at least two of the sub-cavities.

[0006] Preferably, the mounting table is arranged in an "L" shape in the inner cavity, and divides the inner cavity into two sub-cavities with different volumes and shapes.

[0007] Preferably, the upper die base is provided with a positioning pin which vertically penetrates through the blank holder and is fixed on the upper die base, restricting the blank holder on the sub-cavity.

[0008] Preferably, the upper die base is further provided with a side pin which is horizontally inserted into the lower die base and abuts against the limiting hole on the side of the blank holder.

[0009] Preferably, several ejector pins are vertically slidably arranged on the lower die base, and the ejector pins slide vertically in a horizontal plane to penetrate through the blank holder and eject the outer panel of the front roof of the vehicle out of the lower punch.

[0010] Preferably, it further includes a pneumatic component which is connected to the ejector pins, and the pneumatic component can be used to control the sliding of the ejector pins on the lower die base.

[0011] As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following beneficial effects:

[0012] (1) The present invention provides a multi-blank holder die structure for the outer panel of the front roof of a vehicle, which has a simple structure, is easy to manufacture, easy to implement and has a low cost. It can effectively solve the problem that the shaping quality of the outer panel of the front roof of the vehicle is unqualified when processed by the existing single-blank holder structure. In this solution, there are at least two independent sub-cavities in the upper die base, and blank holders are respectively installed in the sub-cavities. When facing the existing outer panel of the front roof of the vehicle, first, the blank holders in each sub-cavity are respectively pressed against the respective local positions of the outer panel of the front roof of the vehicle. The blank holders cooperate with each other, and can effectively press the entire outer panel tightly. By adjusting the blank holding force with a nitrogen spring, the pressure received by each part of the whole outer panel can be kept in a certain balance, ensuring that there is no slippage during the shaping process, and the shaping is more in place, and it is not easy to cause quality problems such as wrinkling. Second, the overall blank holder is divided into multiple independent blank holders, the overall weight is reduced, the disassembly and assembly are more convenient, and local maintenance can be carried out later, and the maintenance cost is lower. Third, when the local shape of the outer panel needs to be redesigned and modified, only one of the blank holders needs to be replaced accordingly, and it is not necessary to replace all the blank holders, saving manufacturing costs.

[0013] (2) In this technical solution, the multi-blank holder structure is more convenient and flexible in the manufacturing and debugging processes compared with the traditional single-blank holder structure, and there are more improvement methods for problems such as poor forming and material wrinkling. For example, methods such as adjusting the blank holding force of a single blank holder and adjusting the position of a single blank holder can be selected.

[0014] (3) In the present technical solution, the limiting pins limit each pressing core in each sub-cavity, thereby effectively preventing the pressing core from naturally sagging and falling out of the upper die seat, which may cause a safety accident.

[0015] (4) In the present technical solution, the lateral pin is horizontally inserted into the lower die seat and stopped in the limiting hole on the side of the pressing core. When the limiting pin function becomes aged or loose and fails, the lateral pin can stop the pressing core to further ensure safety.

[0016] (5) The ejector pin slides perpendicularly to the horizontal plane to push the front roof outer panel of the automobile out of the outside of the lower punch. The shaped front roof outer panel covering of the automobile is ejected to facilitate removal, thereby preventing the problem of material jamming on the lower punch. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0019] Figure 2 This is a schematic structural diagram of an upper die base according to an embodiment of the utility model;

[0020] Figure 3 This is an exploded schematic diagram of the upper die base of the embodiment of the utility model;

[0021] Figure 4 It is a cross-sectional schematic diagram of the upper mold base of the embodiment of the utility model;

[0022] Figure 5 for Figure 4 A partial enlarged view of part A is shown.

[0023] The reference numerals in the accompanying drawings are explained as follows: 1. lower die base; 11. lower punch; 12. ejector pin; 2. upper die base; 21. inner cavity; 211. sub-cavity; 22. shaping insert group; 221. mounting table; 222. insert; 23. limiting pin; 24. lateral pin; 3. pressing core; 4. nitrogen spring. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are the preferred embodiments of the present utility model and should not be regarded as excluding other embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0025] In the claims, the description, and the above-mentioned accompanying drawings of the present utility model, unless otherwise clearly defined, when using terms such as "first", "second", or "third", etc., are for distinguishing different objects and not for describing a specific order.

[0026] In the claims, the description, and the above-mentioned accompanying drawings of the present utility model, unless otherwise clearly defined, for orientation terms, when using terms such as "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", etc. to indicate the orientation or position relationship, it is based on the orientation and position relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it should not be understood as limiting the specific protection scope of the present utility model.

[0027] In the claims, the description, and the above-mentioned accompanying drawings of the present utility model, unless otherwise clearly defined, when using the terms "fixed connection" or "fixedly connected", it should be understood in a broad sense, that is, any connection method without displacement relationship and relative rotation relationship between the two, that is, including non-detachable fixed connection, detachable fixed connection, being integrally connected, and being fixedly connected through other devices or elements.

[0028] In the claims, the description, and the above-mentioned accompanying drawings of the present utility model, when using terms such as "comprising", "having", and their variants, are intended to mean "including but not limited to".

[0029] Please refer to Figures 1 to 5 。

[0030] This embodiment provides a multi-blank holder 3 die structure for the outer panel of the front roof of an automobile, which has a simple structure, is easy to manufacture, is easy to implement, and has a low cost. It can effectively solve the problem that the shaping quality of the outer panel of the front roof of an automobile (not shown in the figure) is unqualified when processed using the existing single blank holder 3 structure; refer to Figure 1 , the die structure mainly includes an upper die base 2 and a lower die base 1; wherein,

[0031] The lower die base 1 has a lower punch 11 for mounting and placing the outer panel of the front roof of the automobile, and the lower punch 11 is arranged inside the lower die base 1;

[0032] Upper die seat 2, see Figure 2 and Figure 3 , the corresponding lower punch 11 is provided with an inner cavity 21 and a shaping insert group 22, the shaping insert group 22 is located inside the inner cavity 21, and divides the inner cavity 21 into at least two independent sub-cavities 211, the number of sub-cavities 211 is selected according to the processing, such as the size of the front roof outer panel cover of the automobile is very large, and the height of each local part is uneven and there is a height difference, that is, a sub-cavity 211 can be separated at the corresponding local position, and the local part is pressed by the pressing core 3 in the sub-cavity 211; each sub-cavity 211 is respectively equipped with a pressing core 3, and each pressing core 3 is adjacent to each other; each pressing core 3 and the upper die seat 2 are respectively provided with a nitrogen spring 4, and each pressing core 3 adjusts the pressing force through the nitrogen spring 4, so that the pressing force can adapt to the corresponding local position;

[0033] In this embodiment, the pressing force of each pressing core 3 corresponding to the covering member is adjusted by the nitrogen spring 4, that is, the pressure on each part of the covering member as a whole is kept in a certain balance, and the covering member will not be tilted, which will affect the processing accuracy.

[0034] In this embodiment, see Figure 4 The shaping insert group 22 includes a mounting platform 221 and an insert 222 fixed on the mounting platform 221. The mounting platform 221 is arranged in an "L-shape" in the inner cavity 21, and divides the inner cavity 21 into two sub-cavities 211. The volumes and shapes of the two sub-cavities 211 are different, and the two sub-cavities 211 can also be the same. In this embodiment, the insert 222 is mainly placed and installed on the mounting platform 221 according to the shape of the mounting platform 221, that is, it is also arranged in an "L-shape" at the upper end. When the pressing core 3 presses the front roof outer panel cover of the automobile, the insert 222 can process the cover.

[0035] In this embodiment, after adjusting the number of corresponding sub-cavities 211 according to the number of local positions to be pressed, the shape of the mounting platform 221 can also be changed and designed to achieve the separation effect.

[0036] In this embodiment, see Figure 5 The upper die base 2 is provided with a limiting pin 23, and there are a plurality of limiting pins 23. Each limiting pin 23 is respectively passed through the pressure core 3 perpendicular to the horizontal plane and is fixed on the upper die base 2; after the limiting pin 23 passes through the pressure core 3, it also passes through the upper die base 2, and limits the pressure core 3 on the entire limiting pin 23, so that the pressure core 3 cannot leave the sub-cavity 211.

[0037] In the present embodiment, in order to further ensure safety and prevent operational hazards, a lateral pin 24 is further provided on the upper die base 2. There are a number of lateral pins 24, which are mainly distributed around the sub-cavity 211, that is, the lateral pins 24 are axially and horizontally inserted on the lower die base 1, and the stop position is in the limiting hole on the side of the pressing core 3. In this way, when the pressing core 3 moves up and down, the size of the limiting hole determines its maximum stroke position, which can be limited so that the pressing core 3 can never leave the sub-cavity 211, and there is no need to worry about the limiting pin 23 loosening.

[0038] In this embodiment, the lower die base 1 is vertically slidably provided with a plurality of ejector pins 12, which slide vertically relative to the lower die base 1 and the horizontal plane, and push the front roof outer panel of the automobile out of the lower punch 11, and the shaped front roof outer panel cover of the automobile is ejected to facilitate the removal of the parts, and prevent the problem of material jamming on the lower punch 11. It also includes a pneumatic component, which is mainly a cylinder, and the cylinder is connected to the ejector pin 12. By controlling the operation of the cylinder, the ejector pin 12 can be controlled to slide on the lower die base 1.

[0039] In this embodiment, the upper die seat 2 moves downward relative to the lower die seat 1, and the pressing cores 3 in each independent sub-cavity 211 act on each part of the front roof outer panel of the automobile respectively, and each pressing core 3 cooperates with each other to press the entire front roof outer panel of the automobile as a whole onto the lower punch 11; subsequently, the upper die seat 2 continues to move downward, and the nitrogen spring 4 compresses and transmits force to the pressing core 3 to press the cover more tightly, and the shaping insert group 22 moves downward to perform the shaping process. The utility model has a simple structure, is easy to manufacture, is easy to implement and has low cost, and can effectively solve the problem of unqualified shaping quality of the front roof outer panel of the automobile caused by the existing single pressing core 3 structure processing. In the present scheme, the upper die seat 2 has at least two independent sub-cavities 211, and each of the sub-cavities 211 is equipped with a pressing core 3. When facing the existing automobile front roof outer panel covering, firstly, the pressing core 3 in each sub-cavity 211 is pressed into each local position of the automobile front roof outer panel covering, and each pressing core 3 cooperates with each other to effectively press the entire covering completely, and the pressing force is adjusted by the nitrogen spring 4, so that the pressure on each local part of the covering as a whole can be kept in a certain balance, ensuring that there will be no slippage during the shaping process, the shaping is more in place, and it is not easy to cause quality problems such as wrinkling; secondly, the overall pressing core 3 is divided into a plurality of independent pressing cores 3, the overall weight is reduced, and disassembly and assembly are more convenient, and local maintenance can be carried out later, and the maintenance cost is lower; thirdly, when the local shape of the covering needs to be redesigned and modified, it is only necessary to replace one of the pressing cores 3 to adapt it, and there is no need to replace all the pressing cores 3, saving manufacturing costs.

[0040] The description of the above-mentioned specification and embodiments is used to explain the protection scope of the present utility model, but does not constitute a limitation to the protection scope of the present utility model. Through the inspiration of the present utility model or the above-mentioned embodiments, those of ordinary skill in the art, in combination with common general knowledge, ordinary technical knowledge in the art, and / or the prior art, can obtain through logical analysis, reasoning, or limited experiments modifications, equivalent replacements, or other improvements to the embodiments of the present utility model or some of its technical features, which shall all be included within the protection scope of the present utility model.

Claims

1. A multi-pressing core mold structure for a front roof outer panel of an automobile, characterized in that: include A lower die base having a lower punch for mounting and placing a front roof outer panel of an automobile; The upper die seat is provided with an inner cavity and a shaping insert group corresponding to the lower punch, the shaping insert group is located inside the inner cavity and divides the inner cavity into at least two independent sub-cavities; the sub-cavities are respectively provided with pressing cores, and the pressing cores are arranged adjacent to each other; nitrogen springs are respectively provided between the pressing cores and the upper die seat, and the pressing force of each pressing core is adjusted by the nitrogen springs; The upper die seat moves downward relative to the lower die seat, and the pressing cores in each independent cavity act on each part of the front roof outer panel of the automobile respectively, so as to press the front roof outer panel of the automobile as a whole onto the lower punch.

2. A multi-pressing core mold structure for a front roof outer panel of an automobile as claimed in claim 1, characterized in that: The shaping insert set comprises a mounting platform and an insert fixed on the mounting platform. The mounting platform is arranged inside the inner cavity and divides the inner cavity into at least two sub-cavities.

3. A multi-core die structure for a front roof outer panel of an automobile as claimed in claim 2, characterized in that: The mounting platform is arranged in an "L" shape in the inner cavity, and divides the inner cavity into two sub-cavities, and the volumes and shapes of the two sub-cavities are different.

4. A multi-pressing core mold structure for a front roof outer panel of an automobile as claimed in claim 1, characterized in that: The upper die seat is provided with a limiting pin, and the limiting pin is vertically arranged in the horizontal plane through the pressing core and fixed on the upper die seat, so as to limit the pressing core on the sub-cavity.

5. The multi-pressing core mold structure of the front roof outer panel of an automobile as claimed in claim 1, characterized in that: The upper die seat is also provided with a lateral pin, which is horizontally inserted into the lower die seat and stops in a limiting hole on the side of the pressing core.

6. A multi-pressing core mold structure for a front roof outer panel of an automobile as claimed in claim 1, characterized in that: The lower die seat is vertically slidably provided with a plurality of ejector pins, and the ejector pins slide vertically to the horizontal plane to pass through the pressing core to push the front top outer panel of the automobile out of the lower convex die.

7. A multi-pressing core mold structure for a front roof outer panel of an automobile as claimed in claim 6, characterized in that: It also includes a pneumatic component, which is connected to the ejection pin. The ejection pin can be controlled to slide on the lower die seat through the pneumatic component.

Images