Improved method for stamping dies

Abstract

The application discloses an improved method of a stamping die, comprising the following steps: placing a pressure-sensitive paper on a pressure surface of a plate to be stamped, and placing the plate to be stamped into a stamping die for stamping; obtaining a processable area of the stamping die according to development of the pressure-sensitive paper; adjusting a length of a cutting tool according to a bending angle of the processable area; and opening a plurality of grooves in the processable area of the stamping die by the cutting tool to obtain an improved grid stamping die, wherein each groove is used for foreign matter to enter to collect the foreign matter. The application judges the pressure degree of each part on the die through the pressure-sensitive paper, and then judges the processable area on the die, and subsequently opens the grooves in the processable area, so that if there is foreign matter in the processable area, the foreign matter can fall into the grooves, and then stamping is performed, the foreign matter does not affect plate stamping, the plate surface after stamping is smooth, the size is in line with the regulations, and no pitting occurs.

Description

Technical Field

[0001] This invention relates to the field of stamping equipment technology, and in particular to an improved method for stamping dies. Background Technology

[0002] Stamping dies are special process equipment used in cold stamping to process materials (metal or non-metal) into parts (or semi-finished products). They are called cold stamping dies (commonly known as cold stamping dies). Stamping is a pressure processing method that uses dies mounted on a press to apply pressure to materials at room temperature, causing them to separate or plastically deform, thereby obtaining the desired parts.

[0003] In existing stamping dies, if there are foreign objects between the die and the sheet metal to be stamped, the sheet metal surface will be pressed against the foreign objects during the stamping process, which will prevent the sheet metal from being completely separated from the stamping die. The sheet metal will not be able to fully form the shape of the stamping die, and the surface of the sheet metal is prone to forming raised pits due to the contact of foreign objects, resulting in an uneven surface and non-compliant dimensions after stamping. Summary of the Invention

[0004] The main objective of this invention is to provide an improved method for stamping dies, which aims to solve the problem that existing stamping dies are prone to causing uneven surfaces and non-compliant dimensions of the stamped sheet due to foreign objects between the die and the sheet to be stamped.

[0005] To achieve the above objectives, the present invention provides an improved method for stamping dies, comprising the following steps:

[0006] The pressure-sensitive paper is placed on the pressure surface of the sheet metal to be stamped, and the sheet metal to be stamped is placed into the stamping die for stamping;

[0007] Based on the development of the pressure-sensitive paper, the machinable area of ​​the stamping die is obtained;

[0008] Adjust the length of the cutting tool according to the bending angle of the machinable area;

[0009] An improved grid stamping die is obtained by creating multiple grooves in the machinable area of ​​the stamping die using the cutting tool, wherein each groove is used to allow foreign objects to enter and collect them.

[0010] Preferably, the plurality of groove arrays cover the processable area.

[0011] Preferably, the groove is a circular groove, and the diameter of the groove is 1.8mm to 2.2mm, and the distance between any two adjacent grooves is less than the diameter of the groove.

[0012] Preferably, the step of placing the pressure-sensitive paper on the pressure-bearing surface of the sheet metal to be stamped, and placing the sheet metal into the stamping die for stamping includes:

[0013] The medium-pressure sensitive paper is placed on the pressure surface of the first plate, and the first test plate is placed into the stamping die for stamping;

[0014] Remove the first test plate from the stamping die and remove the medium-pressure paper;

[0015] The high-pressure sensing paper is placed on the pressure surface of the second test plate, and the second test plate is placed into the stamping die for stamping;

[0016] Remove the second test plate from the stamping die and remove the high-pressure sensing paper.

[0017] Preferably, the step of obtaining the machinable area of ​​the stamping die based on the development of the pressure-sensitive paper includes:

[0018] Compare the developed color of the medium-pressure sensitive paper with the corresponding color card, and mark the area on the medium-pressure sensitive paper where the developed color is lower than the first preset value to obtain the first processable area;

[0019] Compare the developed color of the high-pressure paper with the corresponding color card, and mark the area on the high-pressure paper where the developed color is lower than the second preset value to obtain the second processable area;

[0020] By comparing the first processable region and the second processable region, the overlapping portion is marked to obtain the processable region.

[0021] Preferably, the cutting tool includes a cutting head and a mounting shank, and the step of adjusting the length of the cutting tool according to the bending angle of the machinable area includes:

[0022] The required length of the cutting tool is calculated based on the maximum bending angle of the machinable area.

[0023] An extension rod is added between the cutting head and the mounting shank to bring the cutting tool to the required length.

[0024] Preferably, the cutting tool is a ball end mill.

[0025] Preferably, the cross-sectional dimensions of the extension rod gradually decrease from the mounting shank towards the cutter head.

[0026] Preferably, the stamping die includes an upper die and a lower die, and the groove is formed on the top surface of the lower die.

[0027] Preferably, the upper mold is formed into an upwardly convex arc shape, and the shape of the lower mold is adapted to the shape of the upper mold.

[0028] In the technical solution of this invention, pressure-sensitive paper is placed on the pressure-bearing surface of the sheet metal to be stamped, and then the sheet metal is stamped. The pressure intensity of each part on the mold is judged by the development of the pressure-sensitive paper, and then the machinable area on the mold is determined. The criteria for judging the machinable area are that grooving will not affect the overall strength of the mold, will not cause the mold to deform, and will not affect the shape of the sheet metal after stamping. Then, grooves are opened in the machinable area so that if there are foreign objects in the machinable area, they can fall into the grooves. At this time, stamping is carried out, and the foreign objects will not affect the stamping of the sheet metal, so that the surface of the stamped sheet metal is flat, the dimensions are compliant, and no pitting is produced. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of the improved stamping die and sheet metal according to an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the cutting blade and sheet metal of a stamping die according to an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the structure of a stamping die according to an embodiment of the present invention.

[0033] Figure 4 This is a flowchart illustrating an improved method for stamping dies according to an embodiment of the present invention;

[0034] Figure 5 This is a detailed flowchart of an improved method S100 for stamping dies according to an embodiment of the present invention;

[0035] Figure 6 This is a detailed flowchart of an improved method S200 for stamping dies according to an embodiment of the present invention;

[0036] Figure 7 This is a detailed flowchart of an improved method S300 for stamping dies according to an embodiment of the present invention.

[0037] Explanation of icon numbers:

[0038] The objectives, features, and advantages of this invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0039] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture (as shown in the attached figure). If the specific posture changes, the directional indicator will also change accordingly.

[0041] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0043] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible to those skilled in the art. If a combination of technical solutions contradicts each other or cannot be implemented, such a combination should be considered non-existent and not within the scope of protection claimed by the present invention. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0044] This invention proposes an improved method for stamping dies.

[0045] Please combine Figure 1 , Figure 2 , Figure 3 and Figure 4The improved method for stamping dies in this embodiment includes the following steps:

[0046] S100: Place the pressure-sensitive paper on the pressure-bearing surface of the sheet metal to be stamped, and then place the sheet metal into the stamping die for stamping;

[0047] Understandably, the pressure-bearing surface is usually the upper surface of the sheet metal to be stamped;

[0048] S200: Based on the development of the pressure-sensitive paper, the machinable area of ​​the stamping die is obtained;

[0049] By comparing the color of the pressure-sensitive paper with the color card, the pressure applied to each part of the stamping die can be determined;

[0050] S300: Adjust the length of the cutting tool according to the curvature angle of the machined area;

[0051] The surface of stamping dies has many bending variations. Therefore, when using conventional cutting tools, if the bending of the surface in the machinable area is large, interference can easily occur between the surface and the component that mounts the cutting tool. This can prevent grooving in some areas of the machinable area. Therefore, the length of the cutting tool should be adjusted according to the bending angle of the machinable area so that grooving can be performed at any position in the machinable area. This prevents foreign objects from being left in some areas that cannot be grooved, thereby improving the flatness of the sheet metal after stamping.

[0052] S400: An improved grid stamping die is obtained by creating multiple grooves in the machinable area of ​​the stamping die using a cutting tool, wherein each groove is used to allow foreign objects to enter and collect them.

[0053] In the technical solution of the present invention, pressure-sensitive paper is placed on the pressure surface of the plate 4 to be stamped, and then the plate 4 to be stamped is stamped. The pressure intensity of each part on the mold is judged by the development of the pressure-sensitive paper, and then the machinable area on the mold is determined. The criterion for judging the machinable area is that grooving will not affect the overall strength of the mold, will not cause the mold to deform, and will not affect the shape of the plate 4 after stamping. Then, a groove 12 is opened in the machinable area so that if there is a foreign object 3 in the machinable area, it can fall into the groove 12. At this time, stamping is carried out, and the foreign object 3 will not affect the stamping of the plate 4, so that the surface of the plate 4 after stamping is flat, the dimensions are compliant, and no pitting 30 is generated.

[0054] Furthermore, multiple grooves 12 are arrayed to cover the machinable area. The presence of grooves 12 covering the machinable area allows all foreign objects 3 within the machinable area to fall into the grooves 12, further preventing the sheet material 4 from protruding due to foreign objects 3 and ensuring the flatness of the sheet material 4.

[0055] In one embodiment, the groove 12 is a circular groove with a diameter of 1.8 mm to 2.2 mm. The distance between any two adjacent grooves 12 is less than the diameter of the groove 12. The diameter of the groove 12 cannot be too large or too small. If it is too small, the foreign object 3 will not be able to fall into the groove 12, thus failing to serve its purpose of containing the foreign object 3. If it is too large, the overall strength of the stamping die 1 will be insufficient, leading to deformation, or the sheet metal 4 will deform after stamping. Therefore, when the diameter of the groove 12 is set to 1.8 mm to 2.2 mm, the strength of the stamping die 1 can be ensured while maximizing the containment of the foreign object 3. When the distance between adjacent grooves 12 is less than the diameter of the groove 12, the grooves 12 are made as dense as possible, thereby improving the containment rate of the foreign object 3.

[0056] Please see Figure 5 In one embodiment, step S100 includes:

[0057] S110: Place the medium-pressure sensitive paper on the pressure surface of the first plate and place the first test plate into the stamping die for stamping;

[0058] S120: Remove the first test plate from the stamping die and remove the medium pressure paper;

[0059] S130: Place the high-pressure sensing paper on the pressure-bearing surface of the second test plate, and place the second test plate into the stamping die for stamping;

[0060] S140: Remove the second test plate from the stamping die and remove the high-pressure sensing paper.

[0061] Understandably, medium-pressure and high-pressure pressure-sensitive paper uses existing technology. By conducting two stamping tests using high-pressure and medium-pressure pressure-sensitive paper, the accuracy of detection of the processable area can be improved, damage to the stamping die can be prevented, and its safety can be enhanced.

[0062] Please see Figure 6 Furthermore, step S200 includes:

[0063] S210: Compare the developed medium-pressure paper with the corresponding color card, mark the area on the medium-pressure paper where the developed color is lower than the first preset value, and obtain the first processable area;

[0064] S220: Compare the developed color of the high-pressure paper with the corresponding color card, mark the area on the high-pressure paper where the developed color is lower than the second preset value, and obtain the second processable area;

[0065] S230: Compare the first machinable region and the second machinable region, mark their overlapping parts, and obtain the machinable region.

[0066] The medium-pressure and high-pressure paper are compared with their corresponding color charts. The part of the medium-pressure paper with a color lower than 0.3 of the color chart is marked as the first processable area, and the part of the high-pressure paper with a color lower than 0 of the color chart is marked as the second processable area. The processable area is obtained by overlapping the first and second processable areas, so that the processable area is more accurate, the coverage of the groove 12 is improved, and the stability of the stamping die 1 is improved.

[0067] Please see Figure 7 In one embodiment, the cutting tool includes a cutting head and a mounting shank, and step S300 includes:

[0068] S310: Calculate the required length of the cutting tool based on the maximum bending angle of the machinable area;

[0069] S320: An extension rod is added between the tool tip and the mounting shank to allow the cutting tool to reach the required length.

[0070] Since the length of the cutting head 21 on the market cannot meet the length requirements of the cutting tool 2, an extension rod 22 needs to be installed between the cutting head 21 and the tool holder to make the cutting tool 2 reach the required length. The tool extension shank that needs to be heated for installation has the characteristics of long length, high precision, and stable quality.

[0071] In one embodiment, the cutting tool 2 is a ball end mill. When the cutting tool 2 is a ball end mill, the groove 12 is more stable, less prone to breakage, and has a longer service life.

[0072] In one embodiment, the cross-sectional dimensions of the extension rod 22 gradually decrease from the mounting shank 20 towards the cutter head 21. Since the cross-sectional dimension of the extension rod 22 is larger than the radius of the cutter head 21, it needs to gradually decrease towards the cutter head 21 to ensure that the cross-sectional dimensions at the connection point with the cutter head 21 are compatible with the cutter head 21, thereby improving the stability of the cutter head 21.

[0073] In one embodiment, the stamping die 1 includes an upper die 10 and a lower die 11. The top surface of the lower die 11 is provided with a groove 12. Foreign objects 3 on the upper die 10 will fall off due to gravity. Therefore, the upper die 10 does not need to have a groove 12, but only the lower die 11 needs to have one, thereby reducing the process flow and improving production efficiency.

[0074] In one embodiment, the upper mold 10 is formed into an upwardly convex arc shape, and the shape of the lower mold 11 is adapted to the shape of the upper mold 10. The upward convexity of the upper mold 10 makes it easier for the foreign object 3 to fall off the upper mold 10, reducing the impact of the foreign object 3.

[0075] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. An improved method for stamping dies, characterized in that, Includes the following steps: The pressure-sensitive paper is placed on the pressure surface of the sheet metal to be stamped, and the sheet metal to be stamped is placed into the stamping die for stamping; Based on the development of the pressure-sensitive paper, the machinable area of ​​the stamping die is obtained; Adjust the length of the cutting tool according to the bending angle of the machinable area; An improved grid stamping die is obtained by creating multiple grooves in the machinable area of ​​the stamping die using the cutting tool, wherein each groove is used to allow foreign objects to enter and collect them; The steps of placing pressure-sensitive paper on the pressure-bearing surface of the sheet metal to be stamped, and placing the sheet metal into the stamping die for stamping include: The medium-pressure sensitive paper is placed on the pressure surface of the first plate, and the first test plate is placed into the stamping die for stamping; Remove the first test plate from the stamping die and remove the medium-pressure paper; The high-pressure sensing paper is placed on the pressure surface of the second test plate, and the second test plate is placed into the stamping die for stamping; Remove the second test plate from the stamping die and remove the high-pressure sensing paper; The step of obtaining the machinable area of ​​the stamping die based on the development of the pressure-sensitive paper includes: Compare the developed color of the medium-pressure sensitive paper with the corresponding color card, and mark the area on the medium-pressure sensitive paper where the developed color is lower than the first preset value to obtain the first processable area; Compare the developed color of the high-pressure paper with the corresponding color card, and mark the area on the high-pressure paper where the developed color is lower than the second preset value to obtain the second processable area; By comparing the first processable region and the second processable region, the overlapping portion is marked to obtain the processable region.

2. The improved method for stamping dies as described in claim 1, characterized in that, The array of multiple grooves covers the machinable area.

3. The improved method for stamping dies as described in claim 2, characterized in that, The groove is a circular groove with a diameter of 1.8mm to 2.2mm, and the distance between any two adjacent grooves is less than the diameter of the groove.

4. The improved method of the stamping die according to any one of claims 1-3, characterized in that, The cutting tool includes a cutting head and a mounting shank, and the step of adjusting the length of the cutting tool according to the bending angle of the machinable area includes: The required length of the cutting tool is calculated based on the maximum bending angle of the machinable area. An extension rod is added between the cutting head and the mounting shank to bring the cutting tool to the required length.

5. The improved method for stamping dies as described in claim 4, characterized in that, The cutting tool is a ball end mill.

6. The improved method for stamping dies as described in claim 4, characterized in that, The cross-sectional dimensions of the extension rod gradually decrease from the mounting shank towards the cutter head.

7. The improved method of the stamping die according to any one of claims 1-3, characterized in that, The stamping die includes an upper die and a lower die, and the groove is formed on the top surface of the lower die.

8. The improved method for stamping dies as described in claim 7, characterized in that, The upper mold forms an upwardly convex arc shape, and the shape of the lower mold is adapted to the shape of the upper mold.

Images