Stamping die, stamped part, and method for processing a stamped part

Abstract

The application discloses a stamping die, a stamping part and a processing method of the stamping part, relates to the technical field of stamping processing, and aims to solve the problem of poor appearance effect and quality of a workpiece processed by a stamping die. The stamping die comprises a punch and a die. The punch can move towards or away from the die to process a to-be-stamped part. The stamping surface of the punch is provided with a groove array. The stamping die is used for processing the stamping part.

Description

Technical Field

[0001] This application relates to the field of stamping technology, and in particular to a stamping die, a stamped part, and a method for processing the stamped part. Background Technology

[0002] During vehicle production, sheet metal parts of various parts of the vehicle are usually processed separately, such as door panels, roof panels, engine covers, etc., before the vehicle is assembled.

[0003] In related technologies, stamping dies are commonly used to process sheet metal parts of vehicles. Stamping dies include punches and dies, which can move relative to each other. As the punches and dies approach each other, the punches can apply pressure to the workpiece, thereby processing the workpiece into a shape that is the same as the shape of the punch surface.

[0004] However, during the process of processing workpieces using stamping dies, burrs, flanging, etc. may exist on the surface of the workpiece facing the punch, and air dust, impurity particles, etc. may also adhere to the workpiece and the punch, resulting in problems such as deformation, pits, and bulging of the processed workpiece, which in turn affects the appearance and quality of the workpiece. Summary of the Invention

[0005] The purpose of this application is to provide a stamping die, a stamping part, and a method for processing stamping parts, which aims to solve the problem of poor appearance and quality of workpieces processed by stamping dies.

[0006] In a first aspect, a stamping die is provided, including a punch and a die. The punch is movable relative to the die in a direction closer to or farther from the die to stamp a workpiece. The punch's stamping surface is provided with an array of grooves. The stamping die of this application is used to process stamped parts.

[0007] By setting up a groove array, during the process of applying pressure to the workpiece through the punch to stamp it, the grooves can accommodate burrs on the workpiece and dust adhering to the workpiece and the punch, thereby preventing burrs and dust from being located between the punching surface of the punch and the workpiece.

[0008] In this way, during the stamping process of the part to be stamped by the stamping die, the contact effect between the stamping surface of the part to be stamped and the punch can be improved, thereby improving the stamping effect of the punch and die on the part to be stamped, and thus improving the appearance and quality of the stamped part processed by the stamping die.

[0009] Meanwhile, by setting up a groove array, air can be prevented from being squeezed between the stamping surfaces of the workpiece and the punch, thus avoiding problems such as bulging of the stamped parts processed by the stamping die, and further improving the appearance and quality of the stamped parts processed by the stamping die.

[0010] In some embodiments, the depth direction of the groove is perpendicular to the tangent plane of the stamping surface region where the groove is located.

[0011] According to the above technical means, burrs and dust can easily enter the groove, avoiding contact between burrs and dust and the side wall of the groove, which would cause burrs and dust to get stuck between the punching surface of the punch and the part to be punched.

[0012] In some embodiments, the depth of the groove is greater than or equal to 3 mm and less than or equal to 7 mm. And / or, the distance between two adjacent grooves is greater than or equal to 2 mm and less than or equal to 4 mm. And / or, the diameter of the groove is greater than or equal to 3 mm and less than or equal to 6 mm.

[0013] Based on the above technical means, the groove can be guaranteed to contain burrs and dust, thereby improving the appearance and quality of stamped parts processed by stamping dies.

[0014] In some embodiments, for any two tangent planes of the stamping surface region, the included angle between the two tangent planes is less than or equal to 35°.

[0015] Based on the above technical means, it is possible to avoid an excessively large included angle between any two cutting planes of the stamping surface, thereby avoiding cutting of the stamping part by the edge of the groove and avoiding scratches on the stamping part processed by the stamping die.

[0016] In some embodiments, the bottom surface of the groove is a concave arc surface.

[0017] According to the above-mentioned technical means, when dust or other particles fall into the groove, it can prevent the dust or other particles from getting stuck in the groove, thereby making it easier to clean the groove and facilitate the cleaning and use of the stamping die.

[0018] In some embodiments, the minimum radius of curvature of the stamped surface is greater than or equal to 5 mm.

[0019] The aforementioned technical methods can reduce the machining difficulty of punches and ensure the appearance and quality of stamped parts produced by stamping dies. Secondly, a method for processing stamped parts is provided, comprising: providing a part to be stamped; and stamping the part to be stamped using the aforementioned stamping die to obtain the stamped part.

[0020] In some embodiments, processing a part to be stamped using a stamping die includes: applying a first preset pressure along the direction from the punch to the die to the part to be stamped using a stamping die, so as to stamp the part to be stamped. The first preset pressure is less than or equal to 10 MPa.

[0021] According to the above technical means, by making the first preset pressure less than or equal to 10MPa, it is possible to avoid the punch of the stamping die applying too much pressure to the part to be stamped, thereby avoiding excessive squeezing of the part to be stamped by the edge of the groove, which would cause scratches on the surface of the stamped part. This ensures the appearance and quality of the stamped part processed by the stamping die.

[0022] In some embodiments, the part to be stamped includes a plurality of stamping points. Applying a first preset pressure to the part to be stamped using a stamping die in the direction from the punch to the die includes applying a second preset pressure to the plurality of stamping points of the part to be stamped using a stamping die in the direction from the punch to the die. The second preset pressure is less than or equal to 0.5 MPa.

[0023] According to the above technical means, by making the second preset pressure less than or equal to 0.5MPa, it is possible to avoid the punch of the stamping die applying too much pressure to a certain part of the stamped part, thereby avoiding problems such as deformation of a certain part of the stamped part, and thus ensuring the appearance and quality of the stamped part.

[0024] Thirdly, a stamping part is provided, which is processed by the stamping die described above, or by the processing method described above. Attached Figure Description

[0025] Figure 1 This application provides a schematic diagram of the structure of a stamping die; Figure 2 This application provides a schematic diagram of the structure of a groove array; Figure 3 A schematic diagram of a groove structure provided in this application; Figure 4 This is a schematic diagram of the structure of a stamping surface provided in this application.

[0026] Figure label: 10. Stamping die; 1. Punch; 11. Groove array; 111. Groove; 112. Bottom surface; 12. Stamping surface; 2. Die. Detailed Implementation

[0027] In the embodiments of this application, the terms "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," "third," "fourth," "fifth," and "sixth" may explicitly or implicitly include one or more of that feature.

[0028] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0029] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0030] In the embodiments of this application, "parallel," "perpendicular," and "equal" include the described situation and situations similar to the described situation, where the range of similarity is within an acceptable deviation range, which is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, where the acceptable deviation range for approximate parallelism can be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, where the acceptable deviation range for approximate perpendicularity can also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, where the acceptable deviation range for approximate equality can be, for example, a difference between the two equals being less than or equal to 5% of either one.

[0031] Stamping dies can apply pressure to workpieces, thereby cutting or extruding them and processing them into the required shape.

[0032] Specifically, stamping dies typically include a punch and a die, which can move relative to each other. As the punch and die approach each other, the punch can apply pressure to the workpiece, thereby machining the workpiece into a shape that is the same as the shape of the punch's profile.

[0033] However, during the process of processing workpieces using stamping dies, burrs, flanges, etc. may exist on the surface of the workpiece facing the punch, and air dust, impurity particles, etc. may also adhere to the workpiece and the punch. During the processing of the workpiece, the aforementioned burrs, dust, etc. will affect the contact effect between the punch surface and the workpiece, resulting in problems such as deformation, pits, and bulges in the processed workpiece, which in turn affects the quality of the workpiece.

[0034] To solve the above problems, such as Figure 1 , Figure 2 As shown, this application provides a stamping die 10, including a punch 1 and a die 2. The punch 1 is movable relative to the die 2 in a direction closer to or farther from the die 2 to stamp a part to be stamped.

[0035] For example, punch 1 and die 2 can be arranged vertically. Punch 1 can be located above die 2. By moving punch 1 vertically, punch 1 can be moved closer to or away from die 2. Punch 1 can be located below die 2. By moving die 2 vertically, punch 1 can be moved closer to or away from die 2. Of course, die 2 and punch 1 can be moved simultaneously to move punch 1 closer to or away from die 2.

[0036] Alternatively, punch 1 and die 2 can be arranged in other directions such as the horizontal direction. The movement of punch 1 and die 2 will not be described in detail here.

[0037] In some embodiments, such as Figure 1 , Figure 2 As shown, the stamping surface 12 of the punch 1 is provided with a groove array 11.

[0038] By setting the groove array 11, during the process of applying pressure to the workpiece to be stamped by the punch 1, the groove 111 can accommodate burrs on the workpiece to be stamped and dust and other particles attached to the workpiece to be stamped and the punch 1, thereby preventing burrs, dust and other particles from being located between the stamping surface 12 of the punch 1 and the workpiece to be stamped.

[0039] In this way, during the stamping process of the stamping die 10, the contact effect between the stamping surface 12 of the stamping die 1 and the stamping part can be improved, thereby improving the stamping effect of the punch 1 and the die 2 on the stamping part, and thus improving the appearance and quality of the stamping part processed by the stamping die 10.

[0040] Meanwhile, by setting the groove array 11, air can be prevented from being squeezed between the stamping surface 12 of the part to be stamped and the punch 1, thereby avoiding problems such as bulging of the stamped parts processed by the stamping die 10, and further improving the appearance and quality of the stamped parts processed by the stamping die 10.

[0041] It is understandable that, since the punch 1 is provided with a groove array 11, the flowability of the part to be stamped cannot be too high, so as to avoid the part to be stamped extending into the groove 111 when the punch 1 is used to stamp the part to be stamped.

[0042] For example, the groove array 11 can be a rectangular array, a ring array, etc.

[0043] For example, the part to be stamped can be a sheet metal part from a vehicle, such as the outer door panel, roof cover, engine cover, etc. Or it can be the outer casing of a refrigerator, air conditioner, etc.

[0044] Taking the outer door panel of a vehicle as an example, the outer surface of the door panel is usually curved, so the shape of the stamping surface 12 of the punch 1 for processing the outer door panel is also curved.

[0045] Based on this, in order to ensure the containment effect of the groove array 11 on burrs, dust, etc., the grooves 111 need to be oriented directly towards the stamping part.

[0046] Based on this, in some embodiments, the depth direction of the groove 111 is perpendicular to the tangent plane of the stamping surface 12 region where the groove 111 is located.

[0047] In this way, for any stamping surface 12 region, when the stamping die 10 stamps the workpiece to be stamped and the stamping surface 12 region contacts the workpiece to be stamped, the depth direction of the groove 111 in the region can also be perpendicular to the tangent plane of the corresponding stamping region on the workpiece to be stamped.

[0048] Thus, when the stamping die 10 stamps the part to be stamped, and the stamping surface 12 area contacts the part to be stamped, the opening of the groove 111 in the stamping surface 12 area can face the part to be stamped. This allows burrs, dust, etc. to easily enter the groove 111, and avoids burrs, dust, etc. from contacting the side wall of the groove 111, which would cause burrs, dust, etc. to get stuck between the stamping surface 12 of the punch 1 and the part to be stamped.

[0049] This improves the ability of the groove array 11 to accommodate burrs, dust, etc., thereby further improving the contact effect between the workpiece to be stamped and the stamping surface 12 of the punch 1, and further improving the appearance and quality of the stamped parts processed by the stamping die 10.

[0050] It should be noted that the tangent plane refers to the plane containing the tangent line of the region where the groove 111 is located. For example, if the region where the groove 111 is located is an arc surface, then the tangent plane of that region is the plane tangent to the arc surface. If the region where the groove 111 is located is a plane, then the tangent plane is the plane parallel to the plane containing the groove 111.

[0051] Of course, in some other embodiments, the orientation of the multiple grooves 111 of the groove array 11 can also be the same, which can facilitate the processing of the groove array 11.

[0052] Since burrs and dust have a certain size, it is necessary to ensure the depth of the groove 111. Furthermore, since the depth of the groove 111 affects the structural strength and processing difficulty of the punch 1, it is necessary to limit the depth of the groove 111 to a suitable range.

[0053] Therefore, this application defines the depth of the groove 111. In some embodiments, such as... Figure 1 , Figure 3 As shown, the depth of groove 111 (e.g.) Figure 3 The H shown is greater than or equal to 3 mm and less than or equal to 7 mm.

[0054] By making the depth of the groove 111 greater than or equal to 3mm, the groove 111 can be guaranteed to accommodate burrs and dust, thereby improving the appearance and quality of the stamped parts processed by the stamping die 10.

[0055] Furthermore, by making the depth of the groove 111 less than or equal to 7mm, the depth of the groove 111 can be avoided from being too large, which facilitates the processing of the groove 111 and prevents the excessive depth of the groove 111 from affecting the structural strength of the punch 1. This ensures the structural strength of the punch 1 and facilitates the processing of the punch 1.

[0056] For example, the depth of groove 111 can be 3mm, 4mm, 5mm, 6mm, 7mm, etc.

[0057] Similarly, this application also limits the diameter of the groove 111. In some embodiments, such as... Figure 1 , Figure 3 As shown, the diameter of groove 111 (e.g.) Figure 3 The W shown is greater than or equal to 3 mm and less than or equal to 6 mm.

[0058] By making the diameter of the groove 111 greater than or equal to 3mm, the groove 111 can also be guaranteed to accommodate burrs and dust, thereby improving the appearance and quality of the stamped parts processed by the stamping die 10.

[0059] Furthermore, by making the diameter of the groove 111 less than or equal to 6mm, it is possible to avoid the diameter of the groove 111 being too large, thus avoiding affecting the structural strength of the punch 1.

[0060] For example, the diameter of groove 111 can be 3mm, 4mm, 5mm, 6mm, etc.

[0061] It should be noted that the diameter of the groove 111 refers to the maximum distance between any two points on the inner wall surface of the groove 111.

[0062] For example, the cross-sectional shape of the groove 111 can be circular, square, triangular, irregular, etc.

[0063] Based on this, in order to further ensure the structural strength of the punch 1, in some embodiments, such as Figure 1 , Figure 3 As shown, the spacing between two adjacent grooves 111 (e.g.) Figure 3 D) shown in the figure is greater than or equal to 2 mm and less than or equal to 4 mm.

[0064] By ensuring that the distance between two adjacent grooves 111 is greater than or equal to 2mm, it is possible to avoid the distance between two adjacent grooves 111 being too small and to avoid the grooves 111 being too dense, thereby ensuring the structural strength of the punch 1.

[0065] Furthermore, by making the distance between two adjacent grooves 111 less than or equal to 4mm, it is possible to avoid the distance between two adjacent grooves 111 being too large, thereby ensuring the containment effect of the groove array 11 on burrs and dust, and thus improving the appearance and quality of the stamped parts processed by the stamping die 10.

[0066] For example, the spacing between two adjacent grooves 111 can be 2mm, 2.5mm, 3mm, 3.5mm, 4mm, etc.

[0067] It should be noted that the distance between two adjacent grooves 111 refers to the minimum distance between the inner wall surface of one groove 111 and the inner wall surface of the other groove 111.

[0068] Based on this, in some embodiments, such as Figure 1 , Figure 4 As shown, for any two tangent planes in the region of stamping surface 12, the included angle between the two tangent planes (e.g.) Figure 3 A shown in the figure is less than or equal to 35°.

[0069] By setting the above, the included angle between any two cutting planes of the stamping surface 12 can be avoided to be too large, thereby avoiding excessive bending of the stamping surface 12. In this way, during the stamping process of the part to be stamped by the punch 1, the edge of the groove 111 can be avoided to cause cutting to the part to be stamped, thereby avoiding scratches on the stamped parts processed by the stamping die 10, thus ensuring the appearance and quality of the stamped parts processed by the stamping die 10.

[0070] For example, the included angle between any two tangent planes of the stamping surface 12 can be 0°, 5°, 10°, 15°, 20°, 25°, 30°, 35°, etc.

[0071] In some embodiments, such as Figure 3 As shown, the bottom surface 112 of the groove 111 is a concave arc surface.

[0072] Compared to a flat bottom surface 112, a concave arc surface makes the inner wall of the groove 111 smoother. This prevents dust from getting stuck in the groove 111, making it easier to clean and use the stamping die 10.

[0073] It can also reduce the processing difficulty of the groove 111, thereby facilitating the processing of the groove array 11 and making it easier to process the punch 1.

[0074] For example, a concave arc surface can be a spherical arc surface, a cylindrical arc surface, a parabolic arc surface, etc.

[0075] Of course, in some other embodiments, the bottom surface 112 of the groove 111 can also be a plane, a curved surface, etc.

[0076] In some embodiments, the minimum radius of curvature of the stamped surface 12 is greater than or equal to 5 mm.

[0077] With the above settings, the minimum radius of curvature of the stamping surface 12 is greater than or equal to 5mm, which can prevent the radius of curvature of some areas of the stamping surface 12 from being too small. This can reduce the processing difficulty of the punch 1 and ensure the appearance and quality of the stamped parts processed by the stamping die 10.

[0078] For example, the minimum radius of curvature of the stamped surface 12 can be 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, etc.

[0079] This application also provides a method for processing stamped parts, the method including: A part to be stamped is provided.

[0080] The stamping die 10 described above is used to stamp the part to be stamped in order to obtain the stamped part.

[0081] Thus, the stamping die 10 described above can be used to stamp the workpiece to be stamped, thereby producing the stamped workpiece. Furthermore, the arrangement of the groove array 11 of the punch 1 of the stamping die 10 can improve the appearance and quality of the stamped workpiece.

[0082] Based on this, in some embodiments, the stamping of the part to be stamped using the stamping die 10 includes: A first preset pressure is applied to the workpiece to be stamped using a stamping die 10 in the direction from the punch 1 toward the die 2, so as to stamp the workpiece to be stamped.

[0083] The first preset pressure is less than or equal to 10 MPa.

[0084] It should be noted that the first preset pressure is the pressure borne by the entire part to be stamped, that is, the surface pressure on the surface of the part to be stamped that is in contact with the punch 1.

[0085] By making the first preset pressure less than or equal to 10 MPa, the punch 1 of the stamping die 10 can avoid applying too much pressure to the part to be stamped, thereby avoiding excessive squeezing of the part to be stamped by the edge of the groove 111, which would result in scratches on the surface of the stamped part. This ensures the appearance and quality of the stamped part processed by the stamping die 10.

[0086] In the above embodiments, the magnitude of the first preset pressure can be calculated through simulation. Alternatively, pressure-sensitive paper can be used for detection.

[0087] Specifically, the medium-pressure tactile paper can be placed between the punch 1 and the part to be stamped. The part to be stamped is stamped by the stamping die 10. After stamping, the color change of the medium-pressure tactile paper can be observed. If the medium-pressure tactile paper changes color, when processing the part to be stamped by the stamping die 10, the area on the part to be stamped corresponding to the color change area of ​​the medium-pressure tactile paper needs to be avoided to prevent the part to be stamped from bearing too much pressure and to ensure the appearance and quality of the stamped part.

[0088] For example, the first preset pressure can be 2MPA, 4MPA, 6MPA, 8MPA, 10MPA, etc.

[0089] In some embodiments, the part to be stamped includes a plurality of stamping points.

[0090] Applying a first preset pressure along the direction from the punch 1 toward the die 2 to the workpiece using the stamping die 10 includes: A second preset pressure is applied to multiple stamping points of the workpiece to be stamped using a stamping die 10 in the direction from the punch 1 toward the die 2.

[0091] The second preset pressure is less than or equal to 0.5 MPa.

[0092] It should be noted that the second preset pressure is the pressure borne by the contact point between the part to be stamped and the punch 1.

[0093] By making the second preset pressure less than or equal to 0.5 MPa, it is possible to avoid excessive pressure applied to a certain part of the stamping part by the punch 1 of the stamping die 10, thereby avoiding problems such as deformation of a certain part of the stamping part, and thus ensuring the appearance and quality of the stamping part.

[0094] In the above embodiments, the magnitude of the second preset pressure can be calculated through simulation.

[0095] Specifically, CAE (Computer-Aided Engineering) can be used to analyze the contact stress between the punch 1 and the workpiece to be stamped when the distance between the punch 1 and the die 2 is 70mm, 50mm, 5mm, 0.5mm, 0mm, etc.

[0096] Alternatively, the contact stress between the punch 1 and the part to be stamped can be simulated using a simulation model.

[0097] When it is determined that the pressure on a certain part of the part to be stamped is greater than or equal to 0.5 MPa, in order to avoid data errors, actual testing can also be carried out using pressure-sensitive paper.

[0098] Specifically, ultra-low pressure paper can be placed between the punch 1 and the workpiece to be stamped, and the workpiece to be stamped can be stamped by the stamping die 10. After stamping, the color change of the ultra-low pressure paper can be observed. If the ultra-low pressure paper changes color, it means that the workpiece to be stamped cannot be processed by the stamping die 10.

[0099] For example, the second preset pressure can be 0.1MPA, 0.2MPA, 0.3MPA, 0.4MPA, 0.5MPA, etc.

[0100] This application also provides a stamping part, which is processed by the stamping die 10, or the stamping part is processed by the processing method described above.

[0101] Thus, the stamped parts provided in this application have better appearance and quality.

[0102] In the description of the embodiments of this application, specific features, structures, materials or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0103] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A stamping die, characterized in that, It includes a punch (1) and a die (2); the punch (1) is movable relative to the die (2) in a direction closer to or farther from the die (2) to stamp the part to be stamped; The punch (1) has a groove array (11) on its stamping surface (12).

2. The stamping die according to claim 1, characterized in that, The depth direction of the groove (111) is perpendicular to the tangent plane of the stamping surface (12) region where the groove (111) is located.

3. The stamping die according to claim 1, characterized in that, The depth of the groove (111) is greater than or equal to 3 mm and less than or equal to 7 mm; And / or, the distance between two adjacent grooves (111) is greater than or equal to 2 mm and less than or equal to 4 mm; And / or, the diameter of the groove (111) is greater than or equal to 3 mm and less than or equal to 6 mm.

4. The stamping die according to claim 1, characterized in that, For any two tangent planes of the stamping surface (12) region, the included angle between the two tangent planes is less than or equal to 35°.

5. The stamping die according to claim 1, characterized in that, The bottom surface (112) of the groove (111) is a concave arc surface.

6. The stamping die according to claim 1, characterized in that, The minimum radius of curvature of the stamped surface (12) is greater than or equal to 5 mm.

7. A method for processing stamped parts, characterized in that, include: A part to be stamped is provided; The stamping die (10) as described in any one of claims 1-6 is used to stamp the part to be stamped in order to obtain the stamped part.

8. The processing method according to claim 7, characterized in that, The process of processing the part to be stamped using the stamping die (10) includes: The stamping die (10) is used to apply a first preset pressure to the workpiece to be stamped in the direction from the punch (1) toward the die (2) to stamp the workpiece; Wherein, the first preset pressure is less than or equal to 10 MPa.

9. The processing method according to claim 8, characterized in that, The part to be stamped includes multiple stamping points; The application of a first preset pressure to the workpiece to be stamped using the stamping die (10) in the direction from the punch (1) toward the die (2) includes: The stamping die (10) is used to apply a second preset pressure to the plurality of stamping points of the workpiece to be stamped in the direction from the punch (1) toward the die (2); Wherein, the second preset pressure is less than or equal to 0.5 MPa.

10. A stamped part, characterized in that, The stamped part is processed by the stamping die (10) according to any one of claims 1-6, or the stamped part is processed by the processing method according to any one of claims 7-9.

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