High-stability metal drawing die

Abstract

The utility model relates to the technical field of stretching dies, in particular to a high-stability metal stretching die which comprises an upper die and a lower die, an upper die oil cylinder is installed on the upper die, an upper die core is installed at the bottom of the upper die oil cylinder, a guide column is installed at the bottom of the upper die, and a guide sleeve corresponding to the guide column is installed in the lower die. A telescopic positioning guide column is installed on the lower die, a lower die core is connected to the lower die in a sliding mode, the lower die core is fixedly connected with the ejector plate, a material piece attached to the surface of the lower die core is placed on the lower die, through accurate positioning of the guide column and the guide sleeve, the die opening and closing precision and stability of the die are greatly improved, and through the design of the guide column capable of automatically contracting, the die opening and closing precision is greatly improved. By means of the technical scheme, accurate positioning of the material sheet is achieved, it is guaranteed that the stretched material sheet can accurately and efficiently fall to the designated position, therefore, production efficiency and product quality are improved, and the stability of the die in the ejecting and stretching process is enhanced by arranging the oil cylinder on the upper die body.

Description

Technical Field

[0001] This utility model relates to a stretching die, specifically a highly stable metal stretching die, and belongs to the field of stretching die technology. Background Technology

[0002] A metal stretching die is a device that applies external force to a metal sheet, causing it to extend along a predetermined direction to form a product of the desired shape. It is mainly used to process metal materials of various shapes, such as mechanical parts and hardware products. Through precise design and manufacturing, metal stretching dies can efficiently stretch metal sheets into various complex shapes, such as tanks, pipes, thin plates, and irregularly shaped parts.

[0003] Current molds typically consist of an upper mold and a lower mold to form the finished product. There is no guiding and positioning mechanism between the upper and lower molds. However, the positioning method of the mold often affects the product quality due to the loss of accuracy during continuous production. If the positioning and guiding are deviated, it will reduce the stability of the mold opening and closing. The lower mold core does not have an automatically shrinking guide post, so it is impossible to position the material sheet. It is difficult to ensure that the stretched material sheet can fall accurately to the designated position. During the stretching process, the material sheet deviates from the designated position due to inaccurate positioning, which further reduces production efficiency and yield. The upper mold core is not equipped with a hydraulic cylinder, so it is impossible for the upper mold to be stably pressed against the lower mold core, which cannot improve the stability during the ejection stretching process. Utility Model Content

[0004] The purpose of this invention is to provide a highly stable metal stretching die to solve the above problems. Through the precise positioning of the guide pillars and guide sleeves, the accuracy and stability of the die opening and closing are greatly improved. The automatically retractable guide pillar design not only achieves precise positioning of the sheet material, but also ensures that the stretched sheet material can fall accurately and efficiently to the designated position, thereby improving production efficiency and product quality. By setting a hydraulic cylinder in the upper die, the stability of the die during the ejection stretching process is enhanced.

[0005] This utility model achieves the above-mentioned objectives through the following technical solution: a highly stable metal stretching die, comprising an upper die and a lower die, wherein an upper die cylinder is installed on the upper die, an upper die core is installed at the bottom of the upper die cylinder, a guide post is installed at the bottom of the upper die, a guide sleeve corresponding to the guide post is installed inside the lower die, a telescopic positioning guide post is installed on the lower die, a second spring is clamped between the telescopic positioning guide post and the lower die, a guide rod is fixedly connected inside the lower die, an ejector plate is slidably connected to the guide rod, a first spring is clamped between the ejector plate and the lower die, a lower die core is slidably connected to the lower die, the lower die core is fixedly connected to the ejector plate, and a sheet material conforming to the surface of the lower die core is placed on the lower die.

[0006] Preferably, the guide pillars and guide sleeves are provided in four sets, and the four sets of guide pillars and guide sleeves are distributed in a rectangular array at the bottom of the upper mold and the top of the lower mold.

[0007] Preferably, the retractable positioning guide post is provided in three sets, and the three sets of retractable positioning guide posts are installed on the lower mold in a triangular array.

[0008] Preferably, the length of the guide post at the bottom of the upper mold is less than the depth of the guide sleeve, and the end edge of the guide post has an arc-shaped structure.

[0009] Preferably, the outer side of the lower mold core has an arc-shaped structure, and the inner wall of the upper mold has an arc-shaped structure.

[0010] Preferably, the upper mold core and the lower mold core are arranged in parallel, and the upper mold core and the material sheet are arranged in parallel.

[0011] Preferably, there are four guide rods, and all four guide rods are slidably connected to the top plate, and each of the four guide rods is provided with a spring on its outer side.

[0012] The beneficial effects of this utility model are as follows: through the precise positioning of the guide pillars and guide sleeves, the accuracy and stability of mold opening and closing are greatly improved, reducing errors and mechanical wear in the production process; the automatically retractable guide pillar design not only achieves precise positioning of the material sheet, but also ensures that the stretched material sheet can fall accurately and efficiently to the designated position, thereby improving production efficiency and product quality; by setting a hydraulic cylinder in the upper mold, the stability of the mold during the ejection stretching process is enhanced, further ensuring the smooth progress of the production process. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the connection structure of the upper mold, guide sleeve and guide post of this utility model;

[0015] Figure 3 This is a schematic diagram of the connection structure of the lower mold, the ejector plate, and the guide rod of this utility model;

[0016] Figure 4 This is a schematic diagram of the connection structure between the top plate and the lower mold core of this utility model;

[0017] Figure 5 This is a schematic diagram of the connection structure of the upper mold, upper mold cylinder and upper mold core of this utility model.

[0018] In the diagram: 1. Upper mold; 2. Lower mold; 3. Guide pillar; 4. Guide sleeve; 5. Telescopic positioning guide pillar; 6. Material sheet; 7. Upper mold cylinder; 8. Upper mold core; 9. Lower mold core; 10. Ejector plate; 11. Guide rod; 12. Spring 1; 13. Spring 2. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-5 As shown, a highly stable metal stretching die includes an upper die 1 and a lower die 2. An upper die cylinder 7 is installed on the upper die 1, and an upper die core 8 is installed at the bottom of the upper die cylinder 7. A guide post 3 is installed at the bottom of the upper die 1. A guide sleeve 4 corresponding to the guide post 3 is installed inside the lower die 2. A telescopic positioning guide post 5 is installed on the lower die 2. A second spring 13 is clamped between the telescopic positioning guide posts 5. A guide rod 11 is fixedly connected inside the lower die 2. A top plate 10 is slidably connected to the guide rod 11. A first spring 12 is clamped between the top plate 10 and the lower die 2. A lower die core 9 is slidably connected to the lower die 2. The lower die core 9 is fixedly connected to the top plate 10. A sheet 6 that is in contact with the surface of the lower die core 9 is placed on the lower die 2.

[0021] As a technical optimization of this utility model, the guide post 3 and guide sleeve 4 are provided in four sets, and the four sets of guide post 3 and guide sleeve 4 are distributed in a rectangular array at the bottom of the upper mold 1 and the top of the lower mold 2, so as to ensure that the guide post 3 can be smoothly inserted into the guide sleeve 4, realize the precise positioning of the mold, and improve the stability of the mold opening and closing.

[0022] As a technical optimization of this utility model, the retractable positioning guide post 5 is provided in three sets, and the three sets of retractable positioning guide posts 5 are installed in a triangular array on the lower mold 2. By using the principle of determining the position of the circular material piece 6 by three points, the retractable positioning guide post 5 can limit the material piece 6. When the upper mold moves downward, the retractable positioning guide post 5 can retract downward under the pressure of the upper mold 1, allowing the material piece 6 to stretch smoothly during the mold closing process.

[0023] As a technical optimization of this utility model, the length of the guide post 3 at the bottom of the upper mold 1 is less than the depth of the guide sleeve 4, and the end edge of the guide post 3 has an arc-shaped structure, which facilitates the guide post 3 to enter the interior of the guide sleeve 4.

[0024] As a technical optimization of this utility model, the outer side of the lower mold core 9 is arc-shaped, and the inner wall of the upper mold 1 is arc-shaped. The upper mold core 8 and the lower mold core 9 are arranged in parallel, and the upper mold core 8 and the material sheet 6 are arranged in parallel, so that when the lower mold 2 rises, the lower mold core 9 extrudes the material sheet 6 into shape.

[0025] As a technical optimization of this utility model, four guide rods 11 are provided, and all four guide rods 11 are slidably connected to the top plate 10. Springs 12 are provided on the outer side of each of the four guide rods 11. When the lower mold 2 moves upward, the lower mold core 9 is pushed upward to stretch the material sheet 6. At this time, the springs 12 of the top plate 10 are compressed. When the mold opens and closes, the push-out springs 12 relax, and the lower mold core 9 falls under the force of the push-out springs 12 and its own weight. The workpiece edge is subjected to force, causing the workpiece to separate from the lower mold core 9 and remain between the upper and lower molds 2, making it convenient for the operator to remove the workpiece and proceed to the next process.

[0026] In use, this invention involves mounting the output end of a hydraulic cylinder on the upper mold 1, while another hydraulic cylinder is fixed to the top plate 10. The two hydraulic cylinders are positioned opposite each other. During production, the sheet material 6 is first placed, and the retractable positioning guide post 5 is used to place the sheet material 6 at the center of the lower mold 2, ensuring that the stretched sheet material 6 can accurately fall to the designated position. Utilizing the principle of determining the position of the circular sheet material 6 using three points, the retractable positioning guide post 5 can limit the sheet material 6. When the upper mold 1 moves downward, the retractable positioning guide post 5 can retract downward under the pressure of the upper mold, allowing the sheet material 6 to remain within the mold. The stretching process proceeded smoothly during mold closing. Then, using a hydraulic press, the upper mold 1 was closed. During mold closing, the guide pillars 3 and guide sleeves 4 were used to position the centers of the upper and lower molds. Simultaneously, the upper mold core 8, fixed to the upper mold cylinder 7, was pressed down. The upper and lower mold cores 9 were used to fix the sheet material 6 (while fixing, the center of the sheet material 6 was also shaped, reducing shaping work). The hydraulic press then pushed the ejector plate 10, thereby pushing the lower mold core 9 to perform the stretching and forming action of the sheet material 6. At the same time, the upper mold core 8 was subjected to a certain pressure and moved upwards (the upper and lower mold cores 9 fixed and straightened the sheet material 6, increasing stability). To reduce the displacement of the material sheet 6, the guide rod 11 of the ejector plate 10 is used to reduce the lateral movement of the lower mold core 9, allowing only vertical movement. Finally, the hydraulic ejection device is released, and the lower mold core 9 is automatically reset using spring 12. During the opening process of the upper mold 1, the upper mold cylinder 7 slightly ejects the workpiece, automatically leaving it on the lower mold 2. An upper mold cylinder 7 is added to the upper mold core 8, and installed at an appropriate position on the upper mold core 8 to form a new hydraulic system that controls the extension and retraction of the upper mold core 8. After the mold is closed, the hydraulic control system opens... The oil pipeline is opened, and oil is supplied into the oil cylinder. The upper mold core 8 extends and stably pushes the stretched material sheet 6 onto the lower mold core 9. This not only ensures the stability of the mold opening and closing during the stretching process, but also achieves the effect of shaping the bottom of the workpiece. This eliminates the need for centralized shaping of the workpiece after stretching, reducing production costs such as labor, machinery, and waste. When a stretching error occurs, the hydraulic control system of the upper mold core 8 can eject the defective workpiece stuck on the upper mold core 8. At this time, the operator does not need to exert effort to pry out the defective workpiece, reducing the waste of time costs in production.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A highly stable metal stretching die, comprising an upper die (1) and a lower die (2), characterized in that: The upper mold (1) is equipped with an upper mold cylinder (7), the bottom of the upper mold cylinder (7) is equipped with an upper mold core (8), the bottom of the upper mold (1) is equipped with a guide post (3), the interior of the lower mold (2) is equipped with a guide sleeve (4) corresponding to the guide post (3), the lower mold (2) is equipped with a telescopic positioning guide post (5), the lower mold (2) is equipped with a spring two (13) between the telescopic positioning guide post (5), the interior of the lower mold (2) is fixedly connected with a guide rod (11), the guide rod (11) is slidably connected with a top plate (10), the top plate (10) and the lower mold (2) are clamped with a spring one (12), the lower mold (2) is slidably connected with a lower mold core (9), the lower mold core (9) is fixedly connected with the top plate (10), and a material sheet (6) that fits the surface of the lower mold core (9) is placed on the lower mold (2).

2. The highly stable metal stretching die according to claim 1, characterized in that: The guide pillars (3) and guide sleeves (4) are provided in four sets, and the four sets of guide pillars (3) and guide sleeves (4) are distributed in a rectangular array at the bottom of the upper mold (1) and the top of the lower mold (2).

3. The highly stable metal stretching die according to claim 1, characterized in that: The retractable positioning guide post (5) is provided in three sets, and the three sets of retractable positioning guide posts (5) are installed in a triangular array on the lower mold (2).

4. The highly stable metal stretching die according to claim 1, characterized in that: The length of the guide post (3) at the bottom of the upper mold (1) is less than the depth of the guide sleeve (4), and the end edge of the guide post (3) has an arc-shaped structure.

5. A highly stable metal stretching die according to claim 1, characterized in that: The outer side of the lower mold core (9) has an arc-shaped structure, and the inner wall of the upper mold (1) has an arc-shaped structure.

6. The highly stable metal stretching die according to claim 1, characterized in that: The upper mold core (8) and the lower mold core (9) are arranged in parallel, and the upper mold core (8) and the material sheet (6) are arranged in parallel.

7. A highly stable metal stretching die according to claim 1, characterized in that: There are four guide rods (11), and all four guide rods (11) are slidably connected to the top plate (10). A spring (12) is provided on the outer side of each of the four guide rods (11).

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