A blanking method for punching and shearing without edge collapse

Abstract

The present invention discloses a blanking method for punching and shearing without edge collapse. It comprises the following steps S1: extrusion, placing the workpiece flat in the mold, determining the width of the part to be punched to be L, and then using a raised tip to extrude the edge of the part to be punched, and the tip extrude symmetrically on the upper and lower end faces of the workpiece. After the upper and lower peripheries of the workpiece are extruded, the thickness t of the extruded part is greater than that of other parts, forming a convex edge, and forming a deep groove on the edge of the part to be punched, thereby forming a pre-cut surface. Step S2: flattening, step S3: trimming and blanking. The present invention uses step S1 to extrude the material of the shearing surface before shearing and blanking, and forms a pre-cut surface on the shearing section, and then flattens the raised part of the shearing periphery of the material, and then performs the shearing and blanking process.

Description

Technical Field

[0001] The invention relates to the technical field of industrial processing, in particular to a blanking method of punching and shearing without edge collapse. Background Art

[0002] As we all know, in industrial processing, materials often need to be punched and sheared. The existing punching and shearing method used for materials is to punch and shear by offsetting the upper and lower molds. The part that needs to be cut is cut by the punching force generated. However, this conventional punching method often causes the edge of the cut to collapse, that is, there is a corresponding collapse angle, such as Figures 1 to 2 As shown. At present, the fine blanking method is chosen, but this method can only reduce the span of the collapsed edge, and the collapsed edge will still exist. Summary of the Invention

[0003] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a blanking method for punching and shearing without edge collapse.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A blanking method for punching and shearing without edge collapse comprises the following steps:

[0006] S1. Extrusion: Place the workpiece flat in the die, determine the width of the part to be punched as L, and then use the raised tip to extrude the edge of the part to be punched. The tip extrude symmetrically on the upper and lower end faces of the workpiece. After the upper and lower peripheries of the workpiece are extruded, the thickness t of the part after extrusion is greater than that of other parts, forming a convex edge, and forming a deep groove on the edge of the part to be punched, thereby forming a pre-cut surface.

[0007] S2, flattening, flattening the upper and lower end surfaces of the workpiece processed in step S1. During flattening, the side ends of the workpiece are not constrained, and the flattened force-bearing surface is the part to be punched, so that the thickness of the workpiece reaches the required thickness of the product;

[0008] S3, trimming and blanking: the workpiece flattened in step S2 is cut off at the part that needs to be punched.

[0009] Due to the adoption of the above-mentioned scheme, the present invention adopts the method of extruding the material of the shear surface before shearing and forming a pre-cut surface on the shear section through step S1, and then flattening the raised part around the shearing of the material, and then performing the shearing and blanking process; wherein, since the cut surface of the material is deeply extruded in advance, the deep groove generated greatly reduces the shear strength of the shear surface, and since the material around the shear section inside the material produces inter-grain displacement, the deformation around the section during shearing will be smaller, and the peripheral collapse angle will also be smaller, thereby achieving the effect of no edge collapse after punching and shearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 、 Figure 2 It is a schematic diagram of the existing process in the background technology of the present invention.

[0011] Figure 3 Schematic diagram of the processing process in step S1 of an embodiment of the present invention.

[0012] Figure 4 Schematic diagram of the processing process in step S2 of an embodiment of the present invention.

[0013] Figure 5 Schematic diagram of the processing process in step S3 of the embodiment of the present invention.

[0014] Figure 6 、 Figure 7 It is a schematic diagram of the punching effect after improvement of the embodiment of the present invention. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0016] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0017] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, removable connections, or integral connections. They may refer to mechanical connections or electrical connections. They may refer to direct connections or indirect connections through an intermediary, and they may refer to internal communication between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0018] like Figures 3 to 5 As shown, this embodiment provides a blanking method for punching and shearing without edge collapse, comprising the following steps:

[0019] S1. Extrusion: Place the workpiece flat in the die, determine the width of the part to be punched as L, and then use the raised tip to extrude the edge of the part to be punched. The tip extrude symmetrically on the upper and lower end faces of the workpiece. After the upper and lower peripheries of the workpiece are extruded, the thickness t of the part after extrusion is greater than that of other parts, forming a convex edge, and forming a deep groove on the edge of the part to be punched, thereby forming a pre-cut surface.

[0020] S2, flattening, flattening the upper and lower end surfaces of the workpiece processed in step S1. During flattening, the side ends of the workpiece are not constrained, and the flattened force-bearing surface is the part to be punched, so that the thickness of the workpiece reaches the required thickness of the product;

[0021] S3, trimming and blanking: the workpiece flattened in step S2 is cut off at the part that needs to be punched.

[0022] In this embodiment, the main process steps are convex extrusion, flattening, and trimming. In step S1, the purpose is: since the cut surface of the material is deeply extruded in advance, the deep groove produced greatly reduces the shear strength of the shear surface, and since the material around the shear section inside the material produces displacement between grains, the deformation around the section during shearing will be smaller, and the peripheral collapse angle will also be smaller, so that after punching and shearing, the effect of no collapse is achieved.

[0023] In step S2, the purpose is to flatten the convex edge produced in the previous process to meet the thickness requirements of the product; in step S3, the excess edge material around the product is cut off to meet the size requirements of the product.

[0024] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A blanking method for punching and shearing without edge collapse, characterized in that: The following steps are involved: S1. Extrusion: Place the workpiece flat in the die, determine the width of the part to be punched as L, and then use the raised tip to extrude the edge of the part to be punched. The tip extrude symmetrically on the upper and lower end faces of the workpiece. After the upper and lower peripheries of the workpiece are extruded, the thickness t of the part after extrusion is greater than that of other parts, forming a convex edge, and forming a deep groove on the edge of the part to be punched, thereby forming a pre-cut surface. S2, flattening, flattening the upper and lower end surfaces of the workpiece processed in step S1. During flattening, the side ends of the workpiece are not constrained, and the flattened force-bearing surface is the part to be punched, so that the thickness of the workpiece reaches the required thickness of the product; S3, trimming and blanking: the workpiece flattened in step S2 is cut off at the part that needs to be punched.

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