An outer plate drawing die with positioning structure

Abstract

The utility model is applicable to the technical field of drawing dies, and provides an outer plate drawing die with a positioning structure, comprising an upper die base and a lower die base, the upper die base and the lower die base are pressed together to form a die cavity; a positioning mechanism adjacent to the side of the die cavity; the positioning mechanism comprises a fixed plate arranged on the lower die base; a hole-turning punch arranged on the fixed plate, the end of the hole-turning punch forms an inclined lower section; a pressure ring arranged on the lower die base, a connecting block arranged on the bottom side of the upper die base; a hole-turning die arranged on the bottom side of the connecting block, the end of the hole-turning die forms an inclined upper section that coincides with the inclined lower section; the precise positioning and inclined surface design of the die of the utility model significantly improve the forming accuracy and quality of the workpiece and reduce the scrap rate. At the same time, the efficient hole-turning operation and precise positioning of the die lay the foundation for subsequent processes, improve production efficiency, and reduce production costs. These features together shorten the production cycle and improve the overall production efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of drawing dies, and in particular relates to an outer plate drawing die with a positioning structure. Background Art

[0002] For exterior panel products, the trimming process after drawing is indeed a key link. The challenges faced mainly come from the design of the product profile. When the product profile is relatively simple, relying solely on the profile to achieve precise positioning may not be enough. This is because simple profiles often lack sufficient features to provide precise positioning points. In this case, even if you try to use edge positioning as a rough positioning method, you may find that its accuracy is not enough to meet the high requirements for appearance quality.

[0003] Edge positioning usually relies on the edge or contour of the workpiece for positioning. Although this method is feasible in some cases, its accuracy is often affected by many factors, such as the dimensional tolerance of the workpiece, the elastic deformation of the material, and the vibration during the processing. These factors may cause deviations in the positioning of the workpiece, thus affecting the final product quality.

[0004] In addition, exterior panel products usually have very high requirements for appearance quality, which includes not only the dimensional accuracy of the product, but also the surface smoothness, smoothness of lines, etc. Therefore, it is far from enough to rely solely on edge positioning to achieve precise positioning. Utility Model Content

[0005] The utility model provides an outer panel drawing die with a positioning structure, aiming to solve the problem that a rough positioning method is used for trimming the outer lower panel after drawing, but its accuracy often cannot meet the high appearance quality requirements due to various factors. Therefore, edge positioning alone is not enough to achieve precise positioning. The outer panel has extremely high requirements for appearance quality, including dimensional accuracy, surface finish and line smoothness. In summary, a simple edge positioning method is not enough to meet the problem of precise positioning and high quality requirements of outer panel products.

[0006] The utility model is implemented as follows: an outer plate drawing die with a positioning structure, comprising an upper die seat and a lower die seat, the upper die seat and the lower die seat are pressed together to form a die cavity; a plurality of positioning mechanisms adjacent to the side of the die cavity; wherein the positioning mechanisms comprise: a fixed plate arranged on the lower die seat; a hole-turning punch arranged on the fixed plate, the end of the hole-turning punch adopts a bevel design, the bevel gradually decreases from the radial direction inward to form an inclined lower section; a pressure ring arranged on the lower die seat, a through groove for the hole-turning punch to pass through is opened in the pressure ring; a connecting block arranged on the bottom side of the upper die seat; a hole-turning die arranged on the bottom side of the connecting block, the end of the hole-turning die adopts a bevel design, the bevel gradually decreases from the radial direction outward to form an inclined upper section that matches the inclined lower section.

[0007] Preferably, an assembly groove is provided in the connection block, a return spring is provided in the assembly groove, a damper is provided in the return spring, and a side of the return spring away from the connection block is connected to the hole-flanging die.

[0008] Preferably, the pressure ring is in sliding cooperation with the punch for punching the hole.

[0009] Preferably, the punching die and the punching punch are arranged opposite to each other.

[0010] Preferably, positioning flanging holes are punched between the upper oblique cut surface and the lower oblique cut surface, and the number of the positioning flanging holes is at least 4.

[0011] Preferably, the upper surface of the blank holder is provided with draw ribs.

[0012] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0013] First, by setting a positioning mechanism on the side of the die cavity, several small holes are turned in the waste area during drawing, ensuring high-precision positioning of the workpiece during the drawing process. The inclined design of the hole-turning punch and the hole-turning die not only enables the two to automatically align and position when they come into contact, but also guides the metal flow and optimizes the forming process. This design significantly improves the forming accuracy and quality of the workpiece and reduces the scrap rate caused by inaccurate positioning or poor metal flow.

[0014] Secondly, due to the precise design and reasonable layout of the mold, the hole-turning operation is more efficient, which will serve as the basis for precise positioning in the subsequent trimming process, further improving production efficiency and product quality; at the same time, due to the reduction in scrap rate and shortened production cycle, production costs are also reduced accordingly. In addition, the mold has a compact structure and high stability, which reduces maintenance costs and downtime, further improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 It is a front structural schematic diagram of the positioning mechanism of the utility model;

[0017] Figure 3 It is a schematic diagram of the structure of the punch and die of the utility model;

[0018] Figure 4 It is a schematic diagram of the connection structure between the return spring and the punching die of the utility model;

[0019] In the figure: 1. upper die base; 2. lower die base; 301. fixing plate; 302. punch for flanging holes; 303. pressure ring; 304. through groove; 305. connecting block; 306. die for flanging holes; 4. assembly groove; 5. reset spring; 6. draw rib; 7. positioning mechanism. DETAILED DESCRIPTION

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0021] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0022] The utility model embodiment provides an outer plate drawing die with a positioning structure, such as Figure 1-4 As shown, it includes an upper die base 1 and a lower die base 2, and the upper die base 1 and the lower die base 2 are pressed together to form a die cavity; a plurality of positioning mechanisms 7 adjacent to the side of the die cavity; wherein the positioning mechanism 7 includes: a fixed plate 301 arranged on the lower die base 2; a hole-turning punch 302 arranged on the fixed plate 301, the end of the hole-turning punch 302 is designed with a bevel, and the bevel gradually decreases from the radial direction to the inside to form an inclined lower section; a pressure ring 303 arranged on the lower die base 2, and a through groove 304 for the hole-turning punch 302 to pass through is opened in the pressure ring 303; a connecting block 305 arranged on the bottom side of the upper die base 1; a hole-turning die 306 arranged on the bottom side of the connecting block 305, the end of the hole-turning die 306 is designed with a bevel, and the bevel gradually decreases from the radial direction to the outside to form an inclined upper section that matches the inclined lower section.

[0023] It should be noted that, since the existing trimming of the outer lower panel after drawing adopts a rough positioning method, it is affected by various factors and its accuracy often cannot meet the high appearance quality requirements. Therefore, edge positioning alone is not enough to achieve precise positioning. The outer panel has extremely high requirements for appearance quality, including dimensional accuracy, surface finish and line smoothness. In summary, the simple edge positioning method is not enough to meet the precise positioning and high quality requirements of the outer panel products. The precise positioning and bevel design of the mold in this scheme significantly improve the forming accuracy and quality of the workpiece and reduce the scrap rate. At the same time, the efficient hole turning operation and precise positioning of the mold lay the foundation for subsequent processes, improve production efficiency, and reduce production costs. The compact and stable mold structure further improves production benefits. In summary, these characteristics jointly shorten the production cycle and improve overall production benefits.

[0024] Specifically, in this embodiment, the scheme mainly includes an upper die base 1 and a lower die base 2, which are pressed together to form a die cavity; a plurality of positioning mechanisms 7 adjacent to the side of the die cavity; first, the initial state of the mold is that the upper die base 1 and the lower die base 2 are in a separated state; at this time, the outer plate to be drawn is accurately placed on the lower die base 2 to ensure that the position of the workpiece is correct; at the same time, the positioning mechanism 7 has been preset, and the punch 302 and the punch die 306 have not yet contacted, so they are ready for the next operation;

[0025] Then, the upper die base 1 starts to move downward and gradually approaches the lower die base 2; in this process, the punch 302 and the punch die 306 start to approach each other; due to the inclined surface design of their ends, the inclined lower cutting surface and the inclined upper cutting surface, the two can be automatically aligned and positioned when they come into contact, and this feature ensures the precise matching of the molds and improves the molding accuracy;

[0026] As the upper die holder 1 continues to press downward, the blank holder 303 begins to function; it presses the workpiece tightly against the lower die holder 2, effectively preventing the workpiece from moving during the drawing process; this step ensures the stability of the workpiece during the forming process and avoids errors caused by movement;

[0027] At the same time, the punch 302 continues to move downward, passes through the through slot 304 of the blank holder 303, and cooperates with the punch die 306 to perform a punching operation on the workpiece; the inclined surface design of the punch 302 and the punch die 306 not only enables them to form a tight fit when in contact, but also guides the metal flow and optimizes the forming process; under the push of the punch 302, the material of the workpiece is gradually pulled into the punch die 306 to form the desired punching shape;

[0028] Finally, when the flanging operation is completed, the upper die seat 1 starts to rise and the die is opened; at this time, the workpiece is taken out, and a product with a flanging edge is formed; this flanging edge is not only beautiful and practical, but also serves as a basis for precise positioning in the subsequent trimming process, further improving production efficiency and product quality;

[0029] In general, this outer plate drawing die with a positioning structure achieves efficient and precise hole-turning operations through its unique design and sophisticated mechanism setting; this not only improves the forming quality and production efficiency of the workpiece, but also reduces production costs and operating difficulties, bringing significant benefits to modern industrial production.

[0030] In a further preferred embodiment of the present invention, Figure 4 As shown, the connection block 305 is provided with an assembly groove 4, the assembly groove 4 is provided with a return spring 5, the return spring 5 is provided with a damper, and the side of the return spring 5 away from the connection block 305 is connected to the hole-turning die 306.

[0031] In this embodiment, the damper is arranged inside the reset spring 5 to control the compression and release speed of the reset spring 5; the function of the damper is to reduce the impact and vibration during the reset process to ensure a smooth and stable reset action; this can not only extend the service life of the mold, but also improve the molding accuracy of the workpiece;

[0032] The side of the reset spring 5 away from the connecting block 305 is connected to the hole-turning die 306; this connection method ensures that when the reset spring 5 releases energy, it can directly push the hole-turning die 306 to reset; at the same time, due to the presence of the damper, the reset process is effectively controlled and buffered, avoiding potential problems caused by rapid reset.

[0033] In a further preferred embodiment of the present invention, Figure 2 As shown, the pressure ring 303 is slidably matched with the punch 302 .

[0034] In this embodiment, since the punch 302 and the blank holder 303 are closely matched, this helps to ensure the accuracy of the punching operation and avoid displacement or deformation of the workpiece during the drawing process.

[0035] In a further preferred embodiment of the present invention, Figure 2-3 As shown, the punching die 306 and the punching punch 302 are arranged opposite to each other.

[0036] In this embodiment, the punching punch 302 and the punching die 306 can be precisely aligned when the mold is closed to achieve the punching operation.

[0037] In a further preferred embodiment of the present invention, Figure 1As shown, positioning flanging holes are punched between the upper oblique cut surface and the lower oblique cut surface, and the number of the positioning flanging holes is at least 4.

[0038] In this embodiment, the positioning flanging holes are used to ensure the positioning and stability of the workpiece in the subsequent fine processing, and a sufficient number of positioning flanging holes can disperse the stress on the workpiece and reduce the deformation and wear of the mold. This helps to increase the service life of the mold, reduce maintenance costs, and ensure the continuity of the production process.

[0039] In a further preferred embodiment of the present invention, Figure 1 As shown, the upper surface of the blank holder 303 is provided with a draw rib 6 .

[0040] In this embodiment, the drawbead 6 can disperse and reduce the impact force of the workpiece on the mold, reduce the wear and deformation of the mold, help to extend the service life of the mold, and reduce maintenance costs.

[0041] Working principle: First, the initial state of the mold is that the upper die base 1 and the lower die base 2 are separated; at this time, the outer plate to be drawn is accurately placed on the lower die base 2 to ensure that the position of the workpiece is correct; at the same time, the positioning mechanism 7 has been preset, and the hole-turning punch 302 and the hole-turning die 306 have not yet contacted, ready for the next operation;

[0042] Then, the upper die base 1 starts to move downward and gradually approaches the lower die base 2; in this process, the punch 302 and the punch die 306 start to approach each other; due to the inclined surface design of their ends - the inclined lower cutting surface and the inclined upper cutting surface, the two can automatically align and position when they come into contact, which ensures the precise matching of the molds and improves the molding accuracy;

[0043] As the upper die holder 1 continues to press downward, the blank holder 303 begins to function; it presses the workpiece tightly against the lower die holder 2, effectively preventing the workpiece from moving during the drawing process; this step ensures the stability of the workpiece during the forming process and avoids errors caused by movement;

[0044] At the same time, the punch 302 continues to move downward, passes through the through slot 304 of the blank holder 303, and cooperates with the punch die 306 to perform a punching operation on the workpiece; the inclined surface design of the punch 302 and the punch die 306 not only enables them to form a tight fit when in contact, but also guides the metal flow and optimizes the forming process; under the push of the punch 302, the material of the workpiece is gradually pulled into the punch die 306 to form the desired punching shape;

[0045] Finally, when the flanging operation is completed, the upper die seat 1 starts to rise and the die is opened; at this time, the workpiece is taken out, and a product with a flanging edge is formed; this flanging edge is not only beautiful and practical, but also serves as a basis for precise positioning in the subsequent trimming process, further improving production efficiency and product quality;

[0046] In general, this outer plate drawing die with a positioning structure achieves efficient and precise hole-turning operations through its unique design and sophisticated mechanism setting; this not only improves the forming quality and production efficiency of the workpiece, but also reduces production costs and operating difficulties, bringing significant benefits to modern industrial production.

[0047] It should be noted that, for the above-mentioned embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the utility model is not limited by the described action sequence, because according to the utility model, some steps may be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the utility model.

[0048] In the several embodiments provided in the present application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely schematic, such as the division of the above-mentioned units. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunication or other forms.

[0049] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0050] The above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit the protection scope of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Although the utility model has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the utility model according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the utility model in essence, and these technical solutions also belong to the scope of protection of the utility model.

Claims

1. An outer plate drawing die with a positioning structure, characterized in that: include: An upper die base and a lower die base, wherein the upper die base and the lower die base are pressed together to form a die cavity; A plurality of positioning mechanisms adjacent to the sides of the mold cavity; Wherein, the positioning mechanism comprises: A fixing plate disposed on the lower die base; A punch for punching holes is arranged on the fixed plate, and the end of the punch for punching holes adopts an inclined surface design, and the inclined surface gradually decreases from the radial direction inward to form an inclined lower cutting surface; A blank holder ring is arranged on the lower die seat, wherein a through groove for the punch to penetrate is provided in the blank holder ring; A connecting block provided at the bottom side of the upper die seat; The hole-making die is arranged at the bottom side of the connecting block, and the end of the hole-making die adopts an inclined surface design, and the inclined surface gradually decreases from the radial direction to the outside to form an inclined upper section that coincides with the inclined lower section.

2. The outer plate drawing die with a positioning structure according to claim 1, characterized in that: An assembly groove is provided in the connection block, a return spring is arranged in the assembly groove, a damper is arranged in the return spring, and a side of the return spring away from the connection block is connected to the hole-flanging die.

3. The outer plate drawing die with a positioning structure according to claim 1, characterized in that: The pressure ring is slidably matched with the punch.

4. The outer plate drawing die with a positioning structure as claimed in claim 3, characterized in that: The punching die and the punching convex die are arranged opposite to each other.

5. The outer plate drawing die with a positioning structure according to claim 1, characterized in that: Positioning flanging holes are punched between the upper oblique cut surface and the lower oblique cut surface, and the number of the positioning flanging holes is at least 4.

6. The outer plate drawing die with a positioning structure as claimed in claim 3, characterized in that: The upper surface of the blank holder is provided with draw ribs.

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