A sheet metal stamping die

Abstract

The present invention discloses a sheet metal stamping die, which includes a mutually cooperating upper die base and a lower die base. At both ends inside the upper die base, a set of rotatable round rollers are symmetrically arranged. An arc-shaped plate vertically penetrating the die base is tangentially installed inside the round rollers. A rotating shaft is arranged near the bottom of the arc-shaped plate, and an L-shaped clamping block is arranged at the bottom of the arc-shaped plate. A number of telescopic guide columns are symmetrically installed at the bottom of the upper die base outside the pressing block. On the top of the lower die base, an outer die chamber with an opening on the side is provided. A convex block is arranged on the upper edge of the outer die chamber, and the convex block is movably connected to the rotating shaft. An inner die chamber with upper and lower openings is tangentially arranged inside the outer die chamber. Baffles are symmetrically arranged on the side of the inner die chamber, and the baffles are inserted into the side opening of the outer die chamber, and the outer side of the baffles extends beyond the outer side of the outer die chamber. One end of the baffle extending beyond the outer die chamber is engaged with the L-shaped clamping block. At least two telescopic devices are installed inside the inner die chamber. The present invention can not only quickly demold but also does not affect the product quality.

Description

Technical Field

[0001] The present invention relates to the field of stamping dies, and particularly to a sheet metal stamping die. Background Art

[0002] Stamping is a forming process that applies external forces to sheets, strips, tubes, profiles, etc. by means of a press and a die, causing plastic deformation or separation to obtain workpieces with the required shapes and sizes. The body, chassis, fuel tank, radiator fins of automobiles, the steam drum of a boiler, the shell of a container, the silicon steel sheets of the cores of motors and electrical appliances, etc. are all processed by stamping. In products such as instruments, household appliances, bicycles, office machinery, and daily utensils, there are also a large number of stamping parts. A stamping die is a special process equipment that processes materials into parts in cold stamping. Stamping is a pressure processing method that applies pressure to materials by means of a die installed on a press at room temperature to cause separation or plastic deformation, thereby obtaining the required parts. Generally, a stamping die mainly consists of structures such as an upper punch, a lower die, a moving upper die, a fixed lower die, and a cylinder.

[0003] The separation of a stamping part from the stamping die is called demoulding. Currently, demoulding mainly relies on auxiliary parts such as ejector pins, ejector plates, and ejector rods. However, since the thickness of some sheet metals is relatively thin and they are pressed tightly by the upper die in the stamping groove, it is not easy to demould, and pits are easily left on the surface of the sheet metal when the ejector plate or ejector rod pushes upward, affecting the quality of the product.

[0004] Therefore, it is necessary to invent a sheet metal stamping die that can demould quickly and does not affect the product quality to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a sheet metal stamping die that can demould quickly and does not affect the product quality to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: A sheet metal stamping die, comprising a mutually cooperating upper die base and a lower die base. At both ends inside the upper die base, a set of rotatable round rollers are symmetrically arranged. Inside the round rollers, an arc-shaped plate vertically penetrating the die base is tangentially installed. At a position near the bottom of the arc-shaped plate, a rotating shaft is provided, and an L-shaped clamping block is arranged at the bottom of the arc-shaped plate; at the middle position of the bottom of the upper die base, a pressing block is provided, and a plurality of telescopic guide columns are symmetrically installed outside the pressing block at the bottom of the upper die base. The bottom ends of the telescopic guide columns are connected to the lower die base; on the top of the lower die base, an outer die chamber with an opening on the side is provided. On the upper edge of the outer die chamber, a convex block is provided, and the convex block is movably connected to the rotating shaft. Inside the outer die chamber, an inner die chamber with upper and lower openings is tangentially arranged. On the side of the inner die chamber, baffles are symmetrically arranged. The baffles are inserted into the side opening of the outer die chamber, and the outer sides of the baffles extend beyond the outer side of the outer die chamber. One end of the baffle extending beyond the outer die chamber is engaged with the L-shaped clamping block; at the lower edge of the inner die chamber, a plurality of high-pressure springs are evenly arranged. The bottoms of the high-pressure springs are fixedly installed on the lower die base. Inside the inner die chamber, at least two telescopic devices are installed. Above the telescopic devices, a support plate tangentially contacting the inner wall of the inner die chamber is installed. The support plate and the inner wall of the inner die chamber are tangentially formed into a sheet metal stamping chamber, and the sheet metal stamping chamber is adapted to the pressing block;

[0007] Preferably, a plurality of transverse springs are evenly arranged between the arc-shaped plate and the outer die chamber.

[0008] Preferably, a plurality of universal wheels are evenly installed on the inner wall of the inner die chamber, and the outer sides of the universal wheels are tangentially contacted with the outer wall of the inner die chamber.

[0009] The technical effects and advantages of the present invention:

[0010] In the present invention, the arc-shaped plate movably arranged on the upper die base cooperates with the baffle on the inner die chamber of the lower die base. During sheet metal stamping, the inner die can form a sheet metal stamping chamber with the support plate. When demolding is required after stamping is completed, only the L-shaped clamping block at the bottom of the arc-shaped plate needs to be separated from the baffle, and the inner die will automatically separate from the side wall of the stamped sheet metal part. Then, through the telescopic device arranged inside the inner die chamber moving upward, the sheet metal part located on the support plate is sent out of the sheet metal stamping chamber, and demolding can be completed. Through the present invention, demolding is simple and fast and does not affect the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic cross-sectional view of the overall structure in the sheet metal punching of the present invention.

[0012] Figure 2 It is a schematic cross-sectional view of the overall structure after demolding of the present invention.

[0013] In the figure: 1 upper die holder, 2 lower die holder, 3 pressure block, 4 outer die chamber, 5 arc-shaped plate, 6 round roller, 7 telescopic guide post, 8 telescopic device, 9 baffle plate, 10 transverse spring, 11 rotating shaft, 12 high-pressure spring, 13 universal wheel, 14 inner die chamber, 15 L-shaped fixture block, 16 support plate, 17 sheet metal stamping chamber, 18 sheet metal part. Detailed implementation manner

[0014] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0015] The present invention provides a sheet metal stamping die as shown in the figure, which includes a mutually cooperating upper die base 1 and a lower die base 2. A set of rotatable round rollers 6 are symmetrically arranged at both ends inside the upper die base 1. An arc-shaped plate 5 vertically penetrating the die base 1 is tangentially installed inside the round roller 6. During use, the arc-shaped plate 5 moves up and down along the tangent plane of the round roller 6. A rotating shaft 11 is arranged near the bottom of the arc-shaped plate 5. The rotating shaft 11 is used to fix the arc-shaped plate 5 on the lower die base 2, and an L-shaped clamping block 15 is arranged at the bottom of the arc-shaped plate 5; A pressing block 3 is arranged at the middle position of the bottom of the upper die base 1, and a number of telescopic guide columns 7 are symmetrically installed outside the pressing block 3 at the bottom of the upper die base 1. The bottom end of the telescopic guide column 7 is connected to the lower die base 2. During use, the telescopic guide column 7 can move up and down to drive the upper die base 1 to perform punching operations. As the upper die base 1 moves up and down, the arc-shaped plate 5 swings left and right with the rotating shaft 11 as the rotation point under the cooperation of the round roller 6; An outer die cavity 4 with an opening on the side is arranged at the top of the lower die base 2. A convex block 13 is arranged on the upper edge of the outer die cavity 4. The convex block 13 is movably connected to the rotating shaft 11. An inner die cavity 14 with upper and lower openings is tangentially arranged inside the outer die cavity 4. The inner die cavity 14 can move up and down inside the outer die cavity 4. Baffles 9 are symmetrically arranged on the side of the inner die cavity 14. The baffles 9 are inserted into the side openings of the outer die cavity 4, and the outer sides of the baffles 9 extend beyond the outer side of the outer die cavity 4. One end of the baffle 9 extending beyond the outer die cavity 4 is engaged with the L-shaped clamping block 15. When demoulding is required after punching, the upper die base 1 is moved upward. The arc-shaped plate 5 rotates with the rotating shaft 11 as the axis under the extrusion of the round roller 6. The L-shaped clamping block 15 at the bottom of the arc-shaped plate 5 is separated from the baffle 9. The inner die cavity 14 moves downward under the action of its own gravity, and the side wall of the inner die cavity 14 can be separated from the side wall of the sheet metal part 18; A number of high-pressure springs 12 are evenly arranged at the lower edge of the inner die cavity 14. The bottom of the high-pressure spring 12 is fixedly installed on the lower die base 2. The high-pressure spring 12 can play a buffering role in the falling inner die cavity 14 to avoid mutual impact of the equipment. At least two telescopic devices 8 are installed inside the inner die cavity 14. The telescopic devices 8 can stretch up and down. A support plate 16 tangent to the inner wall of the inner die cavity 14 is installed above the telescopic device 8. During use, the support plate 16 can move up and down with the telescopic device 8. The support plate 16 and the inner wall of the inner die cavity 14 are tangent to form a sheet metal stamping cavity 17. The sheet metal stamping cavity 17 is adapted to the pressing block 3.

[0016] Further, in the above technical solution, a number of transverse springs 10 are evenly arranged between the arc-shaped plate 5 and the outer die cavity 4. The transverse springs 10 can generate an inward tension on the arc-shaped plate 5, making the L-shaped clamping block 15 at the bottom of the arc-shaped plate 5 more tightly engaged with the baffle 9, avoiding the separation of the L-shaped clamping block 15 and the baffle 9 during punching;

[0017] Further, in the above technical solution, a number of universal wheels 13 are evenly installed on the inner wall of the inner mold chamber 14. The outer sides of the universal wheels 13 are tangent to the outer wall of the inner mold chamber 14. The universal wheels 13 can avoid the noise generated by the direct friction between the inner mold chamber 14 and the outer mold chamber 4 and the damage to the equipment caused by the friction.

[0018] The working principle of this utility model:

[0019] Referring to the attached drawings of the specification, when using the present invention, the sheet metal part 18 to be stamped is placed in the sheet metal stamping chamber 17. The telescopic guide post 7 drives the upper die base 1 to move downward. The pressing block 3 at the middle position of the bottom of the upper die base 1 stamps the sheet metal part 18. During the downward movement of the upper die base 1, the L-shaped block 15 at the bottom of the arc-shaped plate 5 moves to the right under the combined action of the round roller 6 and the rotating shaft 11 and engages with the outer end of the baffle 9 on the side of the inner mold chamber 14. Under the pulling force of the transverse spring 10, the L-shaped block 15 moves to the right more easily and engages more tightly with the left end of the baffle 9, completing the punching work of the sheet metal part 18;

[0020] When demoulding is required, the telescopic guide post 7 is controlled to move upward to drive the upper die base 1 to move upward. As the upper die base 1 moves upward, the L-shaped block 15 at the bottom of the arc-shaped plate 5 moves to the left under the combined action of the round roller 6 and the rotating shaft 11. When it moves to a certain position, the L-shaped block 15 separates from the outer end of the baffle 9. The inner mold chamber 14 moves downward under the action of its own gravity, and the side of the sheet metal part 18 can be separated from the inner mold chamber 14. Then, by controlling the telescopic device 8 to move upward, the sheet metal part 18 is removed from the sheet metal stamping chamber 17 under the support of the support plate 16, completing the demoulding work. Since the support plate 16 is a flat whole, it can avoid leaving pits on the surface of the sheet metal when using a top plate or a ejector rod to push upward, which affects the quality of the product;

[0021] The high-pressure spring 12 provided at the lower edge of the inner mold chamber 14 can play a buffering role in the falling inner mold chamber 14 and avoid the equipment from hitting each other; the universal wheels 13 provided on the inner wall of the inner mold chamber 14 can avoid the noise generated by the direct friction between the inner mold chamber 14 and the outer mold chamber 4 and the damage to the equipment caused by the friction.

[0022] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sheet metal stamping die, comprising a cooperating upper die base (1) and a lower die base (2), characterized in that: A set of rotatable round rollers (6) are symmetrically arranged at both ends inside the upper die base (1). An arc-shaped plate (5) vertically penetrating the upper die base (1) is tangentially installed inside the round rollers (6). A rotating shaft (11) is arranged near the bottom of the arc-shaped plate (5), and an L-shaped clamping block (15) is arranged at the bottom of the arc-shaped plate (5). A pressing block (3) is arranged at the middle position of the bottom of the upper die base (1), and a number of telescopic guide columns (7) are symmetrically installed outside the pressing block (3) at the bottom of the upper die base (1). The bottom ends of the telescopic guide columns (7) are connected to the lower die base (2). An outer die cavity (4) with an opening on the side is arranged at the top of the lower die base (2). A convex block is arranged at the upper edge of the outer die cavity (4), and the convex block is movably connected to the rotating shaft (11). An inner die cavity (14) with upper and lower openings is tangentially arranged inside the outer die cavity (4). Baffles (9) are symmetrically arranged on the side of the inner die cavity (14). The baffles (9) are inserted into the side openings of the outer die cavity (4), and the outer ends of the baffles (9) extend beyond the outer surface of the outer die cavity (4). One end of the baffle (9) extending beyond the outer die cavity (4) is engaged with the L-shaped clamping block (15). A number of high-pressure springs (12) are evenly arranged at the lower edge of the inner die cavity (14). The bottoms of the high-pressure springs (12) are fixedly installed on the lower die base (2). At least two telescopic devices (8) are installed inside the inner die cavity (14). A support plate (16) tangentially contacting the inner wall of the inner die cavity (14) is installed above the telescopic device (8). The support plate (16) and the inner wall of the inner die cavity (14) are tangentially formed into a sheet metal stamping cavity (17), and the sheet metal stamping cavity (17) is adapted to the pressing block (3). A number of transverse springs (10) are evenly arranged between the arc-shaped plate (5) and the outer die cavity (4). A number of universal wheels (13) are evenly installed on the inner wall of the inner die cavity (14), and the outer sides of the universal wheels (13) are tangentially contacted with the outer wall of the inner die cavity (14).

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