Plate deep drawing device

Abstract

The utility model relates to the technical field of plate drawing, in particular to a plate drawing device, which comprises a frame and a lower die holder fixed at the inner bottom end of the frame. A drawing cavity is formed in the middle of the upper end of the lower die holder, an upper die holder is arranged above the lower die holder, the upper die holder is slidably connected with the rack in a sleeving mode, a drawing cavity is fixed to the middle of the lower end of the lower die holder, a drawing male die is correspondingly arranged above the drawing cavity, and plate limiting assemblies are arranged on the two sides of the upper portion of the lower die holder; an electric cylinder is fixed at the top end in the rack; the power end of the electric cylinder is connected with a mounting plate; according to the drawing device, the operating rod is held by a hand to rotate anticlockwise, and then the pressing plate, the guide rod, the upper die holder and the drawing male die are pushed downwards by the pressure applying rod, so that the drawing device can be operated manually to perform drawing processing on a plate under the condition of power failure or failure of the electric cylinder, and the drawing efficiency is improved under the condition of power-on or power-off. And normal drawing processing of the drawing device can be effectively ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of sheet metal drawing, in particular to a sheet metal drawing device. Background Art

[0002] Drawing, also known as drawing, stretching, rolling, etc., refers to a mechanical processing technology that uses a mold to stamp a flat blank of a certain shape obtained after blanking into various open hollow parts or to reduce the diameter and increase the height of an open hollow blank. Thin-walled parts with cylindrical, stepped, conical, spherical, box-shaped and other irregular shapes can be manufactured by the drawing process. In cooperation with other stamping forming processes such as flanging, bulging, flaring, necking, etc., parts with extremely complex shapes can also be manufactured.

[0003] Referring to the Chinese patent authorization announcement number CN 219274197 U, which discloses a drawing device, including a lower die and an upper die that can approach or move away from the lower die; the upper die includes an upper die base, a drawing punch disposed on the upper die base, and a blank holder slidably sleeved around the drawing punch. The blank holder is connected to the upper die base through a plurality of spring assemblies, and a cooling circulation system is provided inside the blank holder; the lower die includes a lower die base, a drawing die disposed on the lower die base, and a positioning plate located around the drawing punch, and a heating element is provided inside the positioning plate; the protruding end of the drawing punch matches the concave part of the drawing die, and the drawing punch can be inserted into the drawing die; the center of the bottom side of the blank holder protrudes, and the center of the upper side of the positioning plate is recessed. The concave and convex parts of the bottom side of the blank holder and the upper side of the positioning plate match, and the recessed part on the upper side of the positioning plate is used to place the drawing sheet; the inner edge of the upper part of the drawing die and the lower edge of the drawing punch are both slopes; this drawing device can improve the drawing limit of metal materials, reduce the drawing process, and reduce the wrinkling of the edges of the drawn parts.

[0004] By checking the above comparative documents, it can be seen that the prior art still has the following deficiencies. When the drawing device is working on drawing the sheet metal, generally, an electric cylinder needs to be driven by electricity, and then the telescopic movement of the electric cylinder is used to control the drawing punch to perform the drawing work on the sheet metal. Once the power is cut off or the electric cylinder fails, if the drawing punch cannot be controlled to move down manually, the sheet metal cannot be drawn through this device continuously, which will affect the normal progress of the drawing work. Summary of the Utility Model

[0005] The utility model provides a sheet metal drawing device, which is beneficial to enabling the drawing device to perform drawing work on the sheet metal with or without electricity, and effectively ensuring the normal progress of the drawing work.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A sheet metal drawing device, including a frame and a lower die base, the lower die base is fixed to the inner bottom end of the frame;

[0008] A drawing cavity is formed in the middle of the upper end of the lower die base. An upper die base is arranged above the lower die base. The upper die base is slidably sleeved with the machine frame. A drawing cavity is fixed in the middle of the upper end of the lower die base. A drawing punch is correspondingly arranged above the drawing cavity. Plate limiting components are arranged on both sides above the lower die base;

[0009] An electric cylinder is fixed at the top end inside the machine frame. The power end of the electric cylinder is connected with a mounting plate. The mounting plate is fixed to the upper end of the upper die base by bolts;

[0010] Two guide rods are fixed to the upper end of the upper die base. The guide rods all slide upward through the upper surface of the machine frame. A pressing plate is fixed between the upper ends of the two guide rods. A support spring is connected between the pressing plate and the machine frame. A support frame is fixed to the upper right end of the machine frame. A return force rotating shaft is rotatably connected to the upper end of the support frame. An operating rod is fixed to the upper left end of the return force rotating shaft. A pressing rod fixed to the outside of the return force rotating shaft is arranged above the pressing plate.

[0011] Further, a bottom plate is arranged below the lower die base. At least two return force springs are connected between the bottom plate and the lower die base.

[0012] Further, a ejector rod is fixed to the middle of the upper end of the bottom plate. The ejector rod slides upward through the lower die base and into the drawing cavity. A blank holding plate fixed to the upper end of the ejector rod is arranged in the drawing cavity.

[0013] Further, the plate limiting components are all composed of clamping plates, return force springs and limiting rods. The clamping plates are all arranged between the upper die base and the lower die base. The return force springs are all connected between the clamping plates and the upper die base.

[0014] Further, the limiting rods are all fixed to the upper ends of the clamping plates. The limiting rods all slide upward through the upper surface of the upper die base.

[0015] The beneficial effects of the utility model:

[0016] 1. By placing the plate on the lower die base, before the drawing punch processes the plate by drawing, the clamping plates will limit the plate up and down, which is beneficial to avoiding the accidental edge prying of the plate during drawing and effectively ensuring the quality of the plate drawing process;

[0017] 2. By the resilience of the return force spring, it is beneficial to quickly and conveniently drive the blank holding plate to eject the plate workpiece in the drawing cavity, effectively solving the problem of inconvenient demoulding;

[0018] 3. By disassembling and separating the mounting plate from the upper die base, then holding the operating rod and turning it counterclockwise, and then pushing down the pressure plate, guide rod, upper die base and drawing punch by the pressure rod, in the case of power failure or electric cylinder failure, it is thus beneficial to manually operate the drawing device by manpower to perform drawing processing on the sheet metal. Therefore, whether it is powered on or off, the normal drawing processing of the drawing device can be effectively guaranteed. Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the lower die base of the present invention;

[0021] Figure 3 It is a schematic diagram of the overall power-on working structure of the present invention;

[0022] Figure 4 It is a schematic diagram of the overall power-off working structure of the present invention.

[0023] Description of the reference numerals:

[0024] Frame 1, lower die base 2, drawing cavity 3, bottom plate 4, return spring 5, ejector plate 6, upper die base 7, drawing punch 8, clamping plate 9, limit rod 10, return spring 11, electric cylinder 12, mounting plate 13, pressure plate 14, guide rod 15, support spring 16, return rotating shaft 17, pressure rod 18, operating rod 19, support frame 20, ejector rod 21. Detailed Embodiment

[0025] For the convenience of understanding by those skilled in the art, the present invention will be further described below in conjunction with the embodiments and the drawings. The content mentioned in the embodiments does not limit the present invention.

[0026] Such as Figure 1 、 3As shown in the figure, in this embodiment, it includes a frame 1 and a lower die base 2. The lower die base 2 is fixed to the inner bottom end of the frame 1. In the middle of the upper end of the lower die base 2, a drawing cavity 3 is opened. Above the lower die base 2, an upper die base 7 is provided. The upper die base 7 is slidably sleeved with the frame 1. In the middle of the upper end of the lower die base 2, a drawing cavity 3 is fixed. Above the drawing cavity 3, a drawing punch 8 is correspondingly arranged. On both sides above the lower die base 2, a sheet metal limiting component is provided. The sheet metal limiting components on both sides of the upper end of the lower die base 2 are each composed of a clamping plate 9, a return spring 11 and a limiting rod 10. The clamping plates 9 are each arranged between the upper die base 7 and the lower die base 2. The return springs 11 are each connected between the clamping plate 9 and the upper die base 7. The limiting rods 10 are each fixed to the upper end of the clamping plate 9. The limiting rods 10 each slide upward through the upper surface of the upper die base 7. At the inner top end of the frame 1, an electric cylinder 12 is fixed. The power end of the electric cylinder 12 is connected to a mounting plate 13. The mounting plate 13 is fixed to the upper end of the upper die base 7 by bolts.

[0027] When the sheet metal is drawn by this drawing device, first place the sheet metal on the lower die base 2. On the premise that the electric cylinder 12 is powered on and working, the elongation of the electric cylinder 12 will drive the upper die base 7 to slide downward along the frame 1. The upper die base 7 will drive the clamping plate 9 to first press on the sheet metal. When the upper die base 7 continues to move downward, it will cause the clamping plate 9 to compress the return spring 11. Therefore, the pressing of the clamping plate 9 on the sheet metal is an elastic clamping. Then, the drawing punch 8 will draw the sheet metal into the drawing cavity 3 to form it. During this process, the clamping plate 9 limits the sheet metal up and down, which helps to avoid the situation of accidental edge prying of the sheet metal during drawing, and effectively guarantees the quality of the sheet metal drawing process.

[0028] As Figure 1-3 shown in the figure, in this embodiment, a bottom plate 4 is provided below the lower die base 2. At least two return springs 5 are connected between the bottom plate 4 and the lower die base 2. In the middle of the upper end of the bottom plate 4, a ejector rod 21 is fixed. The ejector rod 21 slides upward through the lower die base 2 and into the drawing cavity 3. In the drawing cavity 3, a blank holding plate 6 fixed to the upper end of the ejector rod 21 is provided.

[0029] During the process of drawing and forming the sheet metal in the drawing cavity 3, the sheet metal will push the blank holding plate 6 downward. The blank holding plate 6 will then push the ejector rod 21 and the bottom plate 4 downward. The bottom plate 4 will stretch the return spring 5. When the electric cylinder 12 contracts and drives the upper die base 7 and the drawing punch 8 to move upward and reset, at the same time the clamping plate 9 no longer presses on the sheet metal. Immediately afterwards, the resilience of the return spring 5 will drive the bottom plate 4, the ejector rod 21 and the blank holding plate 6 to move upward and reset. The blank holding plate 6 will push the drawn sheet metal workpiece upward. Therefore, it helps to quickly and conveniently drive the blank holding plate 6 to eject the sheet metal workpiece in the drawing cavity 3, effectively solving the problem of inconvenient demoulding.

[0030] As Figure 4As shown, in this embodiment, two guide rods 15 are fixed to the upper end of the upper die base 7. The guide rods 15 all slide upward through the upper surface of the frame 1. A pressure plate 14 is fixed between the upper ends of the two guide rods 15. A support spring 16 is connected between the pressure plate 14 and the frame 1. A support frame 20 is fixed to the upper right side of the upper end of the frame 1. A return force rotating shaft 17 is rotatably connected to the upper end of the support frame 20. An operating rod 19 is fixed to the upper left end of the return force rotating shaft 17. A pressing rod 18 fixed outside the return force rotating shaft 17 is arranged above the pressure plate 14.

[0031] When power is cut off or the electric cylinder 12 fails, in order to continue the deep drawing process of the sheet metal through the deep drawing punch 8, the bolts at the connection between the mounting plate 13 and the upper die base 7 are removed, so that the mounting plate 13 and the upper die base 7 are disassembled and separated. Then, hold the operating rod 19 and rotate the return force rotating shaft 17 counterclockwise. The return force rotating shaft 17 will drive the pressing rod 18 to push the pressure plate 14, the guide rods 15, the upper die base 7 and the deep drawing punch 8 downward. At the same time, the pressure plate 14 will compress the support spring 16. Then, the deep drawing punch 8 will perform the deep drawing process on the sheet metal. After the deep drawing process of the sheet metal is completed, release the operating rod 19. The rotational force of the return force rotating shaft 17 will drive the operating rod 19 and the pressing rod 18 to rotate clockwise and return to the original position. Immediately afterwards, the elastic force of the support spring 16 will drive the pressure plate 14, the guide rods 15, the upper die base 7 and the deep drawing punch 8 to move upward and return to the original position, so as to continue the deep drawing process of the sheet metal next time. In summary, in the case of power cut off or the failure of the electric cylinder 12, it is beneficial to manually operate the deep drawing device to perform the deep drawing process on the sheet metal through manpower. Therefore, whether it is powered on or off, the normal deep drawing process of the deep drawing device can be effectively guaranteed.

[0032] All the technical features in this embodiment can be freely combined according to actual needs.

[0033] The above embodiment is a preferred implementation scheme of the present invention. In addition, there are other implementation methods. Any obvious replacement without departing from the concept of the technical solution is within the protection scope of the present invention.

Claims

1. A plate drawing device, comprising a frame (1) and a lower die base (2), wherein the lower die base (2) is fixed to the inner bottom end of the frame (1), characterized in that: A drawing cavity (3) is provided in the middle of the upper end of the lower die base (2); an upper die base (7) is provided above the lower die base (2); the upper die base (7) is slidably sleeved with the frame (1); a drawing cavity (3) is fixed in the middle of the upper end of the lower die base (2); a drawing punch (8) is provided above the drawing cavity (3); and plate limiting components are provided on both sides above the lower die base (2); An electric cylinder (12) is fixed at the top end of the frame (1), a mounting plate (13) is connected to the power end of the electric cylinder (12), and the mounting plate (13) is fixed to the upper end of the upper die seat (7) by bolts; Two guide rods (15) are fixed to the upper end of the upper die seat (7), and the guide rods (15) are slid upward and penetrate the frame (1). A pressure plate (14) is fixed between the upper ends of the two guide rods (15), and a support spring (16) is connected between the pressure plate (14) and the frame (1). A support frame (20) is fixed to the right side of the upper end of the frame (1), and a return shaft (17) is rotatably connected to the upper end of the support frame (20). An operating rod (19) is fixed to the upper left end of the return shaft (17), and a pressure rod (18) fixed to the outside of the return shaft (17) is provided above the pressure plate (14).

2. A sheet drawing device according to claim 1, characterized in that: A bottom plate (4) is provided below the lower die seat (2), and at least two return springs (5) are connected between the bottom plate (4) and the lower die seat (2).

3. A sheet drawing device as claimed in claim 2, characterized in that: A push rod (21) is fixed at the middle of the upper end of the bottom plate (4); the push rod (21) slides upward through the lower die base (2) and penetrates into the drawing cavity (3); and a push plate (6) fixed to the upper end of the push rod (21) is provided in the drawing cavity (3).

4. A sheet drawing device according to claim 1, characterized in that: The plate limiting components are composed of a clamping plate (9), a return spring (11) and a limit rod (10); the clamping plate (9) is arranged between the upper die seat (7) and the lower die seat (2); and the return spring (11) is connected between the clamping plate (9) and the upper die seat (7).

5. A sheet drawing device as claimed in claim 4, characterized in that: The limiting rods (10) are all fixed to the upper end of the clamping plate (9), and the limiting rods (10) are all slid upward and penetrate the upper die seat (7).

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