Stamping die

Abstract

The utility model discloses a stamping die which comprises a lower die, an upper die and a clamping assembly, the lower die comprises a blank holder, the upper die is arranged above the lower die in a lifting mode, and a balance block is arranged at the position, corresponding to the blank holder, of the upper die. The clamping assembly comprises a magnetic attraction plate and a clamping plate, the magnetic attraction plate and the clamping plate are arranged in a stacked mode, the clamping plate is located below the magnetic attraction plate, a first pressure sensing hole is formed in the magnetic attraction plate, a second pressure sensing hole is formed in the position, corresponding to the first pressure sensing hole, of the clamping plate, and the inner wall face of the first pressure sensing hole is magnetically connected with the outer circumferential face of the balance block. The clamping plate is magnetically connected with the magnetic suction plate, and a clamping gap used for clamping induction paper is defined by the clamping plate and the magnetic suction plate. The inner wall face of the magnetic suction plate is magnetically connected to the outer circumferential face of the balance block, it can be ensured that the position of the clamping device is stable during stamping, then it is ensured that the position of the pressure sensing paper is stable, and the success rate of coloring confirmation of the pressure sensing paper can be increased.

Description

Technical Field

[0001] The utility model relates to the field of stamping equipment, in particular to a stamping die. Background Art

[0002] A stamping die is a special process equipment that processes materials (metal or non-metal) into parts (or semi-finished products) in cold stamping. In a stamping die, the balance block is mainly used to adjust the balance of the blank holder. It is an important means to adjust the local blank holder force and the flow of materials. Whether the balance block is adjusted properly directly determines the stability of production and the quality of the product. At present, the balance block is mainly adjusted by pressure-sensitive paper. The specific method is to use adhesive tape to stick the pressure-sensitive paper to the balance block. However, when the upper die moves downward, a very large airflow will be generated, and the pressure-sensitive paper is very easy to fall off the balance block, which will lead to the failure of the pressure-sensitive paper coloring confirmation.

[0003] Therefore, it is necessary to provide a new stamping die to solve the above-mentioned technical problems. Utility Model Content

[0004] The main purpose of the utility model is to provide a stamping die, aiming to solve the problem of low success rate of coloring confirmation of pressure-sensitive paper existing in the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a stamping die, comprising:

[0006] A lower die, wherein the lower die is provided with a blank holder;

[0007] An upper die, the upper die is lifted and lowered above the lower die, and a balancing block is provided at a position of the upper die corresponding to the blank holder;

[0008] A clamping assembly, wherein the clamping assembly includes a magnetic plate and a clamping plate, wherein the magnetic plate and the clamping plate are stacked and the clamping plate is located below the magnetic plate, wherein the magnetic plate is provided with a first pressure-sensitive hole, wherein the clamping plate is provided with a second pressure-sensitive hole corresponding to the position of the first pressure-sensitive hole, wherein the inner wall surface of the first pressure-sensitive hole is magnetically connected to the outer circumferential surface of the balance block, wherein the clamping plate is magnetically connected to the magnetic plate, and wherein the clamping plate and the magnetic plate are arranged to form a clamping gap for clamping the induction paper.

[0009] In one embodiment, the clamping assembly further includes a flexible connector; a first end of the flexible connector is connected to the magnetic plate, and a second end of the flexible connector is connected to the clamping plate.

[0010] In one embodiment, the flexible connector is tape, and the flexible connector includes a first section, a second section and a third section. The first section is bonded to the end surface of the magnetic plate away from the clamping plate, the third section is bonded to the end surface of the clamping plate away from the magnetic plate, and the two ends of the second section are respectively connected to the first section and the third section.

[0011] In one embodiment, a side of the magnetic attraction plate away from the flexible connector and a side of the clamping plate away from the flexible connector are both chamfered or rounded.

[0012] In one embodiment, the diameter of the first pressure-sensing hole is greater than or equal to the diameter of the balancing block, and the diameter of the second pressure-sensing hole is greater than or equal to the diameter of the first pressure-sensing hole.

[0013] In one embodiment, the diameter of the first pressure-sensitive hole is denoted as a, and the diameter of the second pressure-sensitive hole is denoted as b, wherein 0≤b-a≤5mm.

[0014] In one embodiment, the magnetic attraction plate is a hard magnetic rubber plate, and the clamping plate is a steel plate.

[0015] In one embodiment, the thickness of the magnetic plate is between 2.8 mm and 3.2 mm, and the thickness of the clamping plate is between 0.1 mm and 0.3 mm.

[0016] In one embodiment, the upper mold is provided with a first molding block, the lower mold is provided with a second molding block matching the first molding block at a position corresponding to the first molding block, and the pressure ring is provided around the second molding block.

[0017] In one embodiment, there are multiple balancing blocks, and the multiple balancing blocks are arranged at intervals around the circumference of the first forming block, and each of the balancing blocks is correspondingly provided with one clamping assembly.

[0018] In the technical scheme of the utility model, the pressure-sensitive paper is clamped in the clamping gap formed by the clamping plate and the magnetic plate, which can ensure the stable position of the pressure-sensitive paper; the clamping device is magnetically connected to the outer circumferential surface of the balancing block through the inner wall surface of the first pressure-sensitive hole, and the magnetism of the magnetic plate is used to fix the clamping device in a preset position, and then fix the pressure-sensitive paper between the balancing block and the pressure ring. When the upper mold is subjected to the airflow generated when the upper mold moves downward, the clamping device can always be in the preset position under the suction force between the magnetic plate and the balancing block, so as to ensure the success rate of the coloring confirmation of the pressure-sensitive paper; at the same time, the inner wall surface of the first pressure-sensitive hole is magnetically connected to the outer circumferential surface of the balancing block, which can prevent the magnetic plate from detaching from the balancing block, thereby ensuring the stable position of the clamping device, and then ensuring the stable position of the pressure-sensitive paper. The stamping die can ensure the stability of the position of the clamping device during stamping by magnetically connecting the inner wall surface of the magnetic plate to the outer circumferential surface of the balance block, thereby ensuring the stability of the position of the pressure-sensitive paper, which can improve the success rate of pressure-sensitive paper coloring confirmation; at the same time, it can also avoid repeated replacement of the pressure-sensitive paper to reduce production costs and improve work efficiency. In addition, the clamping assembly is installed on the balance block by magnetic attraction. After the pressure-sensitive paper coloring confirmation is completed, there is no glue residue on the surface of the balance block, which can reduce the cleaning frequency and reduce the difficulty of cleaning, thereby improving the utilization rate of the stamping die and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of the stamping die in the embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the lower mold in the embodiment of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the upper mold in the embodiment of the utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the clamping assembly when it is unfolded in the embodiment of the utility model;

[0024] Figure 5 It is a schematic diagram of the structure when the magnetic attraction plate and the clamping plate are stacked in an embodiment of the utility model.

[0025] Description of Figure Numbers:

[0026] Label name Label name 100 Lower die 110 Blank holding ring 120 Second forming block 200 Upper mold 210 Balance weight 220 First forming block 300 Clamping components 310 Magnetic plate 311 The first pressure-sensing hole 312 Chamfer 320 Clamping plate 321 Second pressure-sensing hole 330 Clamping gap 340 Flexible connector 341 Paragraph 1 342 Paragraph 2 343 Paragraph 3

[0027] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0033] The utility model provides a stamping die, aiming to solve the problem of low success rate of coloring confirmation of pressure-sensitive paper in the prior art.

[0034] According to the content recorded in the background technology, in the existing stamping mold, adhesive tape is mainly used to adhere the pressure-sensitive paper to the balance block. However, due to the very large airflow generated when the upper mold moves downward, the pressure-sensitive paper is very easy to fall off the balance block, resulting in the failure of the coloring confirmation of the pressure-sensitive paper. When the staff replaces the sensing paper later, they need to stick the new pressure-sensitive paper to the balance block, which will cause waste of pressure-sensitive paper and increase production costs. At the same time, replacing the pressure-sensitive paper will prolong the time of coloring confirmation of the pressure-sensitive paper and reduce work efficiency. In addition, long-term use of adhesive tape to stick the pressure-sensitive paper to the balance block will cause dust or oil on the surface of the adhesive tape of the balance block. Before the coloring confirmation of the sensing paper, the dirty position needs to be cleaned, which affects work efficiency.

[0035] The utility model provides a stamping die, such as Figures 1 to 4 As shown, the stamping die includes a lower die 100, an upper die 200 and a clamping assembly 300, the lower die 100 is provided with a pressure ring 110, the upper die 200 is raised and lowered above the lower die 100, and the upper die 200 is provided with a balance block 210 corresponding to the position of the pressure ring 110; the clamping assembly 300 includes a magnetic plate 310 and a clamping plate 320, the magnetic plate 310 and the clamping plate 320 are stacked, and the clamping plate 320 is located below the magnetic plate 310, the magnetic plate 310 is provided with a first pressure-sensing hole 311, the clamping plate 320 is provided with a second pressure-sensing hole 321 corresponding to the position of the first pressure-sensing hole 311, the inner wall surface of the first pressure-sensing hole 311 is magnetically connected to the outer circumferential surface of the balance block 210, the clamping plate 320 is magnetically connected to the magnetic plate 310, and the clamping plate 320 and the magnetic plate 310 are surrounded to form a clamping gap 330 for clamping the induction paper.

[0036] Specifically, the pressure-sensitive paper is clamped in the clamping gap 330 formed by the clamping plate 320 and the magnetic plate 310, which can ensure the stable position of the pressure-sensitive paper; the clamping device is magnetically connected to the outer circumferential surface of the balance block 210 through the inner wall surface of the first pressure-sensitive hole 311, and uses the magnetism of the magnetic plate 310 to fix the clamping device at a preset position, and then fix the pressure-sensitive paper to between the balance block 210 and the pressure ring 110. When the upper mold 200 is affected by the airflow generated when the upper mold 200 moves downward, the clamping device can always be in the preset position under the suction force between the magnetic plate 310 and the balance block 210, so as to ensure the success rate of the coloring confirmation of the pressure-sensitive paper; at the same time, the inner wall surface of the first pressure-sensitive hole 311 is magnetically connected to the outer circumferential surface of the balance block 210, which can prevent the magnetic plate 310 from detaching from the balance block 210, thereby ensuring the stable position of the clamping device, and then ensuring the stable position of the pressure-sensitive paper. The stamping die can ensure the stability of the position of the clamping device during stamping by magnetically connecting the inner wall surface of the magnetic plate 310 to the outer circumferential surface of the balance block 210, thereby ensuring the stability of the position of the pressure-sensitive paper, which can improve the success rate of the pressure-sensitive paper coloring confirmation; at the same time, it can also avoid repeated replacement of the pressure-sensitive paper to reduce production costs and improve work efficiency. In addition, the clamping assembly 300 is installed on the balance block 210 by magnetic attraction. After the pressure-sensitive paper coloring confirmation is completed, there is no glue residue on the surface of the balance block 210, which can reduce the cleaning frequency and reduce the difficulty of cleaning, thereby improving the utilization rate of the stamping die and improving work efficiency.

[0037] In one embodiment, if Figure 4 As shown, the clamping assembly 300 also includes a flexible connector 340; the first end of the flexible connector 340 is connected to the magnetic plate 310, and the second end of the flexible connector 340 is connected to the clamping plate 320. Specifically, the magnetic plate 310 and the clamping plate 320 are connected by the flexible connector 340, which can connect the magnetic plate 310 and the clamping plate 320 as a whole to prevent the clamping plate 320 from being separated from the magnetic plate 310; further, when using the clamping assembly 300 to clamp the pressure-sensitive paper, first unfold the clamping assembly 300, and place the pressure-sensitive paper on the magnetic plate 310, then fold the clamping plate 320 and cover it on the pressure-sensitive paper, at this time, the clamping plate 320 is affected by the suction force of the magnetic plate 310, and the pressure-sensitive paper can be clamped between the magnetic plate 310 and the clamping plate 320.

[0038] In a specific embodiment, the flexible connector 340 is adhesive tape, and the flexible connector 340 includes a first section 341, a second section 342, and a third section 343. The first section 341 is bonded to the end surface of the magnetic plate 310 away from the clamping plate 320, the third section 343 is bonded to the end surface of the clamping plate 320 away from the magnetic plate 310, and the two ends of the second section 342 are respectively connected to the first section 341 and the third section 343. Specifically, the magnetic plate 310 and the clamping plate 320 are connected by adhesive tape, which can reduce the difficulty of manufacturing the clamping assembly 300, and the adhesive tape has the characteristic of low cost, which can reduce the production cost.

[0039] In another specific embodiment, Figure 4 As shown, the side of the magnetic plate 310 away from the flexible connector 340 and the side of the clamping plate 320 away from the flexible connector 340 are both provided with chamfers 312 or rounded corners. Specifically, the chamfers 312 or rounded corners provided on the magnetic plate 310 and the clamping plate 320 can effectively prevent the workers from being scratched when assembling and installing the clamping assembly 300, thereby ensuring the safety of the workers; in this embodiment, the side of the magnetic plate 310 away from the flexible connector 340 and the side of the clamping plate 320 away from the flexible connector are both provided with chamfers 312.

[0040] In one embodiment, the diameter of the first pressure-sensitive hole 311 is greater than or equal to the diameter of the balance block 210, and the diameter of the second pressure-sensitive hole 321 is greater than or equal to the diameter of the first pressure-sensitive hole 311. Specifically, the diameter of the first pressure-sensitive hole 311 is greater than or equal to the diameter of the balance block 210, which enables the balance block 210 to pass through the first pressure-sensitive hole 311 to ensure that the inner wall surface of the first pressure-sensitive hole 311 can be magnetically connected to the outer circumference surface of the balance block 210; the diameter of the second pressure-sensitive hole 321 is greater than or equal to the diameter of the first pressure-sensitive hole 311, which can ensure that the pressure-sensitive paper is clamped between the balance block 210 and the edge holding ring 110.

[0041] It should be noted that the coloring confirmation process of the pressure-sensitive paper is as follows: first, the staff clamps the sensing paper between the magnetic suction plate 310 and the clamping plate 320, and then magnetically connects the inner wall surface of the first pressure-sensitive hole 311 with the outer circumferential surface of the balance block 210 to install the clamping assembly 300 on the balance block 210, and finally controls the upper mold 200 to move downward; during the downward movement of the upper mold 200, the balance block 210 drives the clamping assembly 300 to move downward until the clamping block abuts against the pressure ring 110, and then the balance block 210 continues to move downward to push the pressure-sensitive paper at the pressure-sensitive hole downward until the pressure-sensitive paper abuts against the pressure ring 110. At this time, the pressure-sensitive paper is clamped between the balance block 210 and the pressure ring 110, and the coloring confirmation of the pressure-sensitive paper is completed.

[0042] In a specific embodiment, the diameter of the first pressure-sensing hole 311 is recorded as a, and the diameter of the second pressure-sensing hole 321 is recorded as b, where 0≤b-a≤5mm. Specifically, the diameter of the first pressure-sensing hole 311 is smaller than the diameter of the second pressure-sensing hole 321, and the difference between the two is less than 5mm, so as to ensure that the balance block 210 can push the pressure-sensitive paper at the pressure-sensing hole to move downward until the pressure-sensitive paper abuts against the edge holding ring 110, and at the same time, it can also prevent the clamping assembly 300 from interfering with other structures.

[0043] In one embodiment, the magnetic plate 310 is a hard magnetic rubber plate, and the clamping plate 320 is a steel plate. Furthermore, the thickness of the magnetic plate 310 is between 2.8 mm and 3.2 mm, and the thickness of the clamping plate 320 is between 0.1 mm and 0.3 mm. In this embodiment, the magnetic plate 310 adopts a hard magnetic rubber plate with a thickness of 3 mm, which can better fix the clamping assembly 300 in a preset position, and the clamping plate 320 adopts a 0.2 mm steel plate, which can reduce the distance that the balance block 210 pushes the pressure-sensitive paper at the pressure-sensitive hole to move, so as to avoid the pressure-sensitive paper from breaking.

[0044] In one embodiment, if Figure 2 and Figure 3 As shown, the upper die 200 is provided with a first forming block 220, the lower die 100 is provided with a second forming block 120 matching the first forming block 220 at a position corresponding to the first forming block 220, and the blank holder 110 is provided around the second forming block 120. Specifically, during stamping, the upper die 200 moves downward, and the first forming block 220 and the second forming block 120 can cooperate with each other to complete the stamping work.

[0045] In a specific embodiment, Figure 3 As shown, there are multiple balancing blocks 210, and the multiple balancing blocks 210 are arranged at intervals around the circumference of the first forming block 220, and each balancing block 210 is correspondingly provided with a clamping assembly 300. Specifically, the multiple balancing blocks 210 are arranged at intervals around the circumference of the first forming block 220, which can adjust the local blank holding force at various positions around the cavity.

[0046] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A stamping die, characterized in that: include: A lower die, wherein the lower die is provided with a blank holder; An upper die, the upper die is lifted and lowered above the lower die, and a balancing block is provided at a position of the upper die corresponding to the blank holder; A clamping assembly, wherein the clamping assembly includes a magnetic plate and a clamping plate, wherein the magnetic plate and the clamping plate are stacked and the clamping plate is located below the magnetic plate, wherein the magnetic plate is provided with a first pressure-sensitive hole, wherein the clamping plate is provided with a second pressure-sensitive hole corresponding to the position of the first pressure-sensitive hole, wherein the inner wall surface of the first pressure-sensitive hole is magnetically connected to the outer circumferential surface of the balance block, wherein the clamping plate is magnetically connected to the magnetic plate, and wherein the clamping plate and the magnetic plate are arranged to form a clamping gap for clamping the induction paper.

2. The stamping die according to claim 1, characterized in that: The clamping assembly also includes a flexible connector; a first end of the flexible connector is connected to the magnetic attraction plate, and a second end of the flexible connector is connected to the clamping plate.

3. The stamping die according to claim 2, characterized in that: The flexible connector is adhesive tape, and includes a first section, a second section and a third section. The first section is bonded to the end surface of the magnetic plate away from the clamping plate, the third section is bonded to the end surface of the clamping plate away from the magnetic plate, and both ends of the second section are respectively connected to the first section and the third section.

4. The stamping die according to claim 2, characterized in that: A side of the magnetic attraction plate away from the flexible connector and a side of the clamping plate away from the flexible connector are both provided with chamfers or rounded corners.

5. The stamping die according to claim 1, characterized in that: The diameter of the first pressure-sensitive hole is greater than or equal to the diameter of the balance block, and the diameter of the second pressure-sensitive hole is greater than or equal to the diameter of the first pressure-sensitive hole.

6. The stamping die according to claim 4, characterized in that: The diameter of the first pressure-sensitive hole is denoted as a, and the diameter of the second pressure-sensitive hole is denoted as b, wherein 0≤b-a≤5mm.

7. The stamping die according to claim 1, characterized in that: The magnetic attraction plate is a hard magnetic rubber plate, and the clamping plate is a steel plate.

8. The stamping die according to any one of claims 1 to 7, characterized in that: The thickness of the magnetic attraction plate is between 2.8 mm and 3.2 mm, and the thickness of the clamping plate is between 0.1 mm and 0.3 mm.

9. The stamping die according to any one of claims 1 to 7, characterized in that: The upper die is provided with a first forming block, the lower die is provided with a second forming block matching the first forming block at a position corresponding to the first forming block, and the pressure ring is provided around the second forming block.

10. The stamping die according to claim 9, characterized in that: There are multiple balancing blocks, which are arranged at intervals around the circumference of the first forming block, and each of the balancing blocks is correspondingly provided with one clamping assembly.

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