Anti-jumping waste stamping die and punching machine

Abstract

The utility model discloses an anti-jumping waste material stamping die which comprises a fixedly arranged lower die used for bearing materials to be stamped and an upper die capable of moving relative to the lower die, and the upper die comprises a punch used for stamping the materials to be stamped borne by the lower die. The lower die is provided with a blanking knife edge allowing the punch to be inserted when the punch punches a to-be-punched material borne by the lower die, the blanking knife edge comprises a cylindrical transition section and a circular-truncated-cone-shaped blanking section, a certain interference amount is formed between punching waste and the transition section, and therefore the friction force between the punching waste and the blanking knife edge is increased, and the punching quality is improved. And waste is effectively prevented from rising, and the problem that products are crushed due to rising of stamping waste is solved. The utility model further discloses a punching machine.

Description

Technical Field

[0001] This utility model relates to the field of stamping die technology, and in particular to a stamping die and press for preventing scrap from jumping out. Background Technology

[0002] Stamping dies are widely used tools in modern industrial production, primarily for shearing and forming metal materials to achieve high-precision and high-efficiency production. During long-term use, as the cutting edges gradually wear down, the die clearance increases, causing scrap material to intermittently rise to the die surface. This scrap material remains on the die surface and is pressed into the product surface during stamping, causing surface defects such as dents. This results in poor appearance of batches of products, or even product scrapping, leading to significant production losses.

[0003] Currently, to address the issue of scrap rising, common solutions include adding air-blowing structures to the cutting edges and punches, or adding a suction device below the blanking hole in the mold. While these solutions can prevent scrap from rising to some extent, they increase the manufacturing and maintenance costs of the mold, thus raising production expenses. Furthermore, these solutions are less effective in molds with small punches and cutting edges, failing to achieve a satisfactory anti-scraping effect. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide an anti-jumping waste stamping die and a punch press, which can prevent waste from jumping up during the stamping process.

[0005] This utility model provides an anti-jumping scrap stamping die, including a lower die fixedly disposed for carrying the material to be stamped, and an upper die movable relative to the lower die. The upper die includes a punch for stamping the material to be stamped on the lower die. The lower die has a blanking cutter for the punch to insert when stamping the material to be stamped on the lower die. The blanking cutter includes a cylindrical transition section and a frustum-shaped blanking section.

[0006] In one embodiment, the lower mold includes a lower mold base, a lower backing plate, and a lower template. The cutting edge is formed on the lower template, the lower backing plate is mounted on the lower mold base, and the lower template is disposed on the lower backing plate.

[0007] In one embodiment, a first pad block for compensating for the height of the cutting edge is further disposed in the lower template. The first pad block is disposed at the end of the cutting edge away from the upper mold. The first pad block has a discharge hole communicating with the cutting edge. The other end of the first pad block abuts against the lower pad plate.

[0008] In one embodiment, the upper die further includes an upper die base for providing rigid support for the upper die, an upper pad plate mounted on the upper die base, a fixing plate disposed below the upper pad plate, a stripper back plate mounted below the fixing plate, and a stripper plate elastically connected to the stripper back plate, wherein the punch can movably penetrate the stripper plate and the stripper back plate.

[0009] In one embodiment, the device further includes a second pad mounted on the top of the fixed plate and a fixed seat disposed within the fixed plate, wherein the punch is movably mounted within the fixed seat.

[0010] In one embodiment, one end of the second pad abuts against the punch to adjust the height of the punch, and the other end of the second pad abuts against the upper pad plate.

[0011] In one embodiment, the upper mold further includes an elastic element disposed between the stripper back plate and the stripper plate. The elastic element connects the stripper back plate and the stripper plate and can drive the stripper plate to move relative to the lower mold, so that the stripper plate is pressed against the lower mold under the action of the elastic element.

[0012] In one embodiment, a guide sleeve is further included in the stripper plate, the guide sleeve being slidably connected to the punch.

[0013] In one embodiment, both the lower pad and the lower mold base are provided with a waste material channel communicating with the discharge hole.

[0014] This utility model also provides a punch press, including an upper table, a lower table, and the above-described stamping die, wherein the upper die of the stamping die is fixed on the upper table, and the lower die of the stamping die is installed on the lower table.

[0015] The anti-jumping scrap stamping die provided by this utility model is provided with a cylindrical transition section and a frustum-shaped blanking section at the blanking cutter, so that a certain amount of interference is formed between the stamping scrap and the transition section, thereby increasing the friction between the stamping scrap and the blanking cutter, effectively preventing the scrap from jumping up, and solving the problem of product damage caused by the upward movement of stamping scrap. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a preferred embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of a punch in the preferred embodiment of the present invention, when it is pressed to its limit position.

[0019] Reference numerals in the attached drawings: 1. Upper mold base; 2. Upper backing plate; 3. Fixing plate; 4. Stripper backing plate; 5. Stripper plate; 6. Lower mold plate; 7. Lower backing plate; 8. Lower mold base; 9. Cutting edge; 10. First pad block; 11. Guide sleeve; 31. Fixing base; 32. Punch; 33. Second pad block; 91. Transition section; 92. Blanking section. Detailed Implementation

[0020] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0021] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0022] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0024] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0025] Please refer to Figure 1The present invention provides an anti-jumping waste stamping die, including a lower die fixedly disposed for carrying the material to be stamped, and an upper die movable relative to the lower die. The upper die and the lower die are respectively fixed on the upper table and the lower table of the punch press. The upper table of the punch press is integrated with the punch press slide. The punch press slide moves downward under the drive of the punch press crank, thereby driving the upper die to move in the direction of the lower die.

[0026] The upper die includes an upper die base 1 mounted on the press table to provide rigid support for the upper die, an upper pad 2 mounted on the upper die base 1, a fixing plate 3 located below the upper pad 2, a stripper back plate 4 mounted below the fixing plate 3, and a stripper plate 5 elastically connected to the stripper back plate 4. The lower die includes a lower die base 8, a lower pad 7, and a lower template 6. A cutting edge 9 is provided on the lower template 6. The lower pad 7 is mounted on the lower die base 8, and the lower template 6 is located on the lower pad 7. An elastic element is provided between the stripper back plate 4 and the stripper plate 5. When the upper die is pressed down, the stripper plate 5 first contacts the material to be stamped and pushes it onto the surface of the lower template 6. At this time, the elastic element applies continuous downward pressure to the stripper plate 5, pressing the material to be stamped tightly against the surface of the lower template 6, achieving stable fixation.

[0027] Specifically, the upper die also includes a fixed base 31 disposed within the fixed plate 3 and a punch 32 movably installed within the fixed base 31. The punch 32 movably passes through the stripper back plate 4 and the stripper plate 5. Meanwhile, a blanking cutter 9 is provided on the lower die plate 6 for the punch 32 to insert into when stamping the material to be stamped. The blanking cutter 9 consists of a cylindrical transition section 91 and a frustum-shaped blanking section 92. The inner diameter of the connection between the blanking section 92 and the transition section 91 is equal to the inner diameter of the transition section 91. Furthermore, the inner diameter of the blanking section 92 increases sequentially along the direction of the scrap falling. After the material to be stamped is pressed, the punch 32 continues to press down and contact the material to be stamped under the drive of the punch press slide, and performs shearing. The scrap cut off is pressed into the blanking cutter 9 by the punch 32. A certain amount of interference will be formed between the stamped scrap and the transition section 91, which increases the friction between the scrap and the cutter, so that the scrap gets stuck in the transition section 91 and no longer jumps up to the lower die surface, thereby solving the problem of product damage.

[0028] While the above embodiments solve the problem of scrap material accumulation, as the stamping process progresses, the amount of scrap material stuck in the transition section 91 increases, easily leading to blockages. To avoid this problem, such as... Figure 2As shown, in this embodiment, the length of the punch 32 is also controlled so that when the punch 32 is pressed to its limit distance, a distance equal to the thickness of scrap is maintained between the bottom of the punch 32 and the blanking section 92. With the above settings, after the initial stamping is completed, the scrap will be stuck at the bottom of the transition section 91. As the stamping continues, the newly generated scrap will be squeezed by the force of the punch 32 and pushed to the blanking section 92. Since the inner diameter of the blanking section 92 increases sequentially along the direction of scrap falling, the scrap will not be stuck due to size limitations when moving downwards, thus allowing it to be discharged smoothly. At the same time, this structure allows the scrap to move from the wide end to the narrow end along the inner diameter of the blanking section 92 as the punch 32 retracts. The scrap will be blocked by the gradually narrowing inner wall of the blanking section 92 and ejected, effectively reducing the possibility of the scrap bouncing back to the mold surface during the stamping process, thereby avoiding damage to the mold or product caused by the scrap.

[0029] In this embodiment, the elastic element can be in the form of a mechanical spring or a gas spring, and is not limited to a specific structural type. Mechanical springs (such as rectangular springs) can withstand greater pressure without easily deforming, have a longer service life, and are especially suitable for high-frequency stamping environments. Gas springs, on the other hand, can adjust the elastic force through gas pressure to achieve more precise pressure control, adapt to different stamping requirements, and at the same time, the pressure provided by gas springs is relatively stable, with good elastic recovery, enabling them to maintain stable operation for a long time and achieve high processing accuracy.

[0030] After continuous production for a period of time, the thickness of the lower die blade will decrease, resulting in a reduction in the length of the transition section 91. When the thickness of the lower die blade becomes thinner than the thickness of the scrap, the punch 32 will push the scrap directly into the blanking section 92 after shearing it, thus creating the risk of scrap rising again. To solve this problem, in this embodiment, a first pad 10 is provided in the lower template 6 to compensate for the height of the blanking blade 9. One end of the first pad 10 abuts against the blanking blade 9, and the other end of the first pad 10 abuts against the lower pad plate 7. By providing a pad between the lower die blade and the first pad 10, the thinning thickness of the lower die blade can be compensated. At the same time, a second pad 33 is provided in the fixing plate 3 to adjust the height of the punch 32. By adding a corresponding shim between the punch 32 and the upper pad plate 2, the height of the punch 32 is adjusted, always maintaining a distance of one scrap thickness between the punch 32 and the transition section 91, using this scrap to block the upward jump of the scrap below.

[0031] In addition, to facilitate the discharge of waste material, a waste material channel is provided in the first pad block 10, the lower pad plate 7 and the lower mold base 8. The waste material channel is connected to the unloading blade 9 and can quickly discharge the waste material guided by the unloading section 92.

[0032] Preferably, a guide sleeve 11 is provided inside the stripping plate 5. The guide sleeve 11 is slidably connected to the punch 32. The guide sleeve 11 plays a supporting and guiding role in the stripping plate 5, which can reduce the direct contact and friction between the punch 32 and the stripping plate 5. At the same time, the structure of the guide sleeve 11 and the punch 32 slidably connecting can ensure that the punch 32 passes through the stripping plate 5 stably and smoothly during the up and down movement, so that the stripping plate 5 applies stable pressure to the waste, improves the stripping effect, reduces the risk of waste residue, and prevents the waste from jumping during the stamping process.

[0033] This utility model embodiment also provides a punch press, including an upper table, a lower table, and the above-mentioned stamping die.

[0034] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0035] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A stamping die for preventing scrap from jumping out of the die, characterized in that, It includes a fixed lower die for carrying the material to be stamped, and an upper die that can move relative to the lower die, the upper die including a punch (32) for stamping the material to be stamped on the lower die. The lower die is provided with a blanking cutter (9) for the punch (32) to insert when punching the material to be punched on the lower die. The blanking cutter (9) includes a cylindrical transition section (91) and a frustum-shaped blanking section (92). When the punch (32) punches to the limit distance, there is a distance of one scrap thickness between the bottom of the punch (32) and the blanking section (92).

2. The stamping die as described in claim 1, characterized in that, The lower mold includes a lower mold base (8), a lower pad (7) and a lower template (6). The blanking cutter (9) is opened on the lower template (6). The lower pad (7) is installed on the lower mold base (8). The lower template (6) is set on the lower pad (7).

3. The stamping die as described in claim 2, characterized in that, It also includes a first pad (10) disposed in the lower template (6) for compensating the height of the cutting edge (9). The first pad (10) is disposed at the end of the cutting edge (9) away from the upper mold. The first pad (10) has a dropping hole communicating with the cutting edge (9). The other end of the first pad (10) abuts against the lower pad plate (7).

4. The stamping die as described in claim 1, characterized in that, The upper mold also includes an upper mold base (1) for providing rigid support for the upper mold, an upper pad (2) mounted on the upper mold base (1), a fixing plate (3) disposed below the upper pad (2), a stripper back plate (4) mounted below the fixing plate (3), and a stripper plate (5) elastically connected to the stripper back plate (4). The punch (32) can movably penetrate the stripper plate (5) and the stripper back plate (4).

5. The stamping die as described in claim 4, characterized in that, It also includes a second pad (33) installed on the top of the fixed plate (3) and a fixed seat (31) disposed in the fixed plate (3), wherein the punch (32) is movably installed in the fixed seat (31).

6. The stamping die as described in claim 5, characterized in that, One end of the second pad (33) abuts against the punch (32) to adjust the height of the punch (32), and the other end of the second pad (33) abuts against the upper pad (2).

7. The stamping die as described in claim 4, characterized in that, The upper mold also includes an elastic element disposed between the stripper back plate (4) and the stripper plate (5). The elastic element connects the stripper back plate (4) and the stripper plate (5) and can drive the stripper plate (5) to move relative to the lower mold, so that the stripper plate (5) presses against the lower mold under the action of the elastic element.

8. The stamping die as described in claim 7, characterized in that, It also includes a guide sleeve (11) installed in the stripper plate (5), the guide sleeve (11) being slidably connected to the punch (32).

9. The stamping die as described in claim 3, characterized in that, Both the lower pad (7) and the lower mold base (8) are provided with waste material channels that communicate with the discharge hole.

10. A punch press, characterized in that, It includes an upper table, a lower table, and a stamping die as described in any one of claims 1-9, wherein the upper die of the stamping die is fixed on the upper table, and the lower die of the stamping die is mounted on the lower table.

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