Improved structure of forming die for edge rolling and flanging procedures

Abstract

The utility model relates to the technical field of edge rolling processing, and discloses an improved structure of an edge rolling and flanging process forming die, which comprises a fixed seat, a bending concave die, a bending convex die and a pressure plate, the bending concave die is fixed on the fixed seat, a convex edge is arranged on the bending concave die, the first side surface of the convex edge is a first flanging molded surface, and the top surface of the convex edge is a fillet molded surface; the bending male die is provided with a second flanging molded surface matched with the first flanging molded surface, a fillet concave cavity matched with the fillet molded surface and a first material pressing molded surface. The material pressing plate is located on one side of the bending female die and located below the bending male die, a spring is arranged between the material pressing plate and the fixing base, and a second material pressing molded surface matched with the first material pressing molded surface is arranged on the material pressing plate. According to the improved structure of the forming die for the edge rolling and flanging process, the end part of the workpiece to be rolled is formed into the round corner part, so that the forming quality can be obviously improved by further rolling the round corner part, the situation that deformation and scrapping are easy to occur in the one-step forming process is avoided, and the yield is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a round edge processing technical field especially relates to a round edge flanging process forming die improvement structure. BACKGROUND

[0002] In the closed round edge process, generally need to pass through multiple procedures, including multiple times bending, finally form closed round pipe shape.

[0003] Patent CN117259514A discloses a round edge forming die and method, can realize one step to complete bending and round edge forming. Wherein, with the round edge forming block and the lower die forming block pressure, the end of workpiece gradually along the semicircular notch of round edge forming block and the quarter circle notch of lower die forming block bending, finally closed forming.

[0004] The above process is high in processing efficiency, but especially in the process that the end of workpiece initially contacts the profile of semicircular notch and continues to round down, the workpiece does not bend along the semicircular notch shape, thereby deviating from the designed bending radius, finally cannot complete closing, leading to high scrap rate. UTILITY MODEL CONTENT

[0005] Based on the above problems, the purpose of the utility model is to provide a round edge flanging process forming die improvement structure, which independently designs the flanging process and simultaneously performs pre-rounding action to ensure the quality of subsequent round edge forming.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A round edge flanging process forming die improvement structure, comprising a fixed seat, a bending concave die, a bending convex die and a pressing plate, wherein:

[0008] The fixed seat is installed on the lower die seat;

[0009] The bending concave die is fixed on the fixed seat, and a convex rib is arranged on the bending concave die, the first side surface of the convex rib is a first flanging profile, and the top surface of the convex rib is a fillet profile;

[0010] The bending convex die is installed on the upper die seat that is closed with the lower die seat, and a second flanging profile matched with the first flanging profile, a fillet cavity matched with the fillet profile and a first pressing profile are arranged on the bending convex die;

[0011] The pressing plate is located on one side of the bending concave die and below the bending convex die, a spring is arranged between the pressing plate and the fixed seat, and a second pressing profile matched with the first pressing profile is arranged on the pressing plate.

[0012] As an alternative, the second side surface of the convex rib is an extension surface, the fillet surface and the extension surface are smoothly connected with the first flanging surface respectively, and the end of the workpiece to be rounded extends to the extension surface.

[0013] As an alternative, the included angle between the extension surface and the first flanging surface is 15°-25°, and the central angle of the cross-section circular arc of the fillet surface is 155°-165°.

[0014] As an alternative, the first flanging surface and the second flanging surface are both vertical surfaces, and the first pressing surface and the second pressing surface are both inclined surfaces with an angle of 5°-10° with the horizontal surface.

[0015] As an alternative, the first flanging surface is flush with the side surface of the bending die, and the surface of the pressing plate close to the bending die is flush with the second flanging surface.

[0016] The utility model discloses the beneficial effect of:

[0017] The improved structure of the round flanging process forming die forms the flanging of the end of the workpiece to be rounded through the bending die and the bending punch, and forms the round angle part of the flanging through the cooperation of the fillet surface of the bending die and the round angle cavity of the bending punch, so that the further rounding of the round angle part can obviously improve the forming quality, avoid the deformation and scrap in the one-step forming process, and ensure the yield. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The utility model discloses the improved structure of the round flanging process forming die of an embodiment provided by the utility model;

[0019] Figure 2 The utility model discloses the improved structure of the round flanging process forming die of an embodiment provided by the utility model; Figure 1 The utility model discloses the improved structure of the round flanging process forming die of an embodiment provided by the utility model;

[0020] In the drawings:

[0021] 1, fixed seat;

[0022] 2, bending die;21, convex rib;22, first flanging surface;23, fillet surface;24, extension surface;

[0023] 3, bending punch;31, second flanging surface;32, round angle cavity;33, first pressing surface;

[0024] 4, pressing plate;41, second pressing surface;

[0025] 5, spring;

[0026] 6, workpiece to be rounded. DETAILED DESCRIPTION

[0027] The utility model will be described in further detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are merely used to explain the utility model and not to limit the utility model. In addition, it should be noted that only the parts related to the utility model are shown in the drawings for the convenience of description, not all the structures.

[0028] In the description of the utility model, unless explicitly defined and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0029] In the utility model, unless explicitly defined and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0030] In the description of the embodiment, the terms "up", "down", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model.

[0031] In addition, the terms "first", "second" and the like are only used to distinguish in description and have no special meaning.

[0032] Please refer to Figure 1 And Figure 2 As shown in the drawings, the embodiment provides an improved structure of a rounding and flanging process forming die, which comprises a fixed seat 1, a bending concave die 2, a bending convex die 3 and a pressing plate 4, wherein:

[0033] The fixed seat 1 is installed on the lower die seat;

[0034] The bending concave die 2 is fixed on the fixed seat 1, and the bending concave die 2 is provided with a convex rib 21, the first side surface of the convex rib 21 is a first flange surface 22, and the top surface of the convex rib 21 is a rounded surface 23;

[0035] The bending punch 3 is installed on the upper die seat which is closed with the lower die seat, and the second flanging profile 31 matched with the first flanging profile 22, the fillet cavity 32 matched with the fillet profile 23 and the first pressure profile 33 are arranged on the bending punch 3;

[0036] The pressure plate 4 is arranged on one side of the bending die 2 and below the bending punch 3, and the spring 5 is arranged between the pressure plate 4 and the fixed seat 1, and the second pressure profile 41 matched with the first pressure profile 33 is arranged on the pressure plate 4.

[0037] Therefore, the end of the workpiece 6 to be rounded is formed into a flange through the bending die 2 and the bending punch 3, and the flange is formed into a fillet part through the cooperation of the fillet profile 23 of the bending die 2 and the fillet cavity 32 of the bending punch 3, so that the further rounding of the fillet part can obviously improve the forming quality and avoid the deformation and scrap in the one-step forming process, thereby ensuring the yield.

[0038] Optionally, the second side surface of the convex rib 21 is an extension profile 24, the fillet profile 23 is smoothly connected with the first flanging profile 22 and the extension profile 24 respectively, the end of the workpiece 6 to be rounded extends to the extension profile 24, and the edge of the fillet cavity 32 is matched with the extension profile 24.

[0039] Further, the included angle between the extension profile 24 and the first flanging profile 22 is 15°-25° (20° is exemplified in the embodiment), and the central angle of the cross-section arc of the fillet profile 23 is 155°-165° (160° is exemplified in the embodiment), the fillet profile 23 in the angle range can ensure that the workpiece 6 to be rounded has a large bending amount for subsequent rounding, and there is no negative angle part to affect the stripping.

[0040] Optionally, the first flanging profile 22 and the second flanging profile 31 are both vertical surfaces, and the first pressure profile 33 and the second pressure profile 41 are both inclined surfaces with an angle of 5°-10° with the horizontal surface, so that the workpiece 6 to be rounded can be reliably fixed and the flanging effect is ensured.

[0041] Optionally, the first flanging profile 22 is flush with the side surface of the bending die 2, and the surface of the pressure plate 4 close to the bending die 2 is flush with the second flanging profile 31, so that the structure of the bending die 2, the bending punch 3 and the pressure plate 4 is optimized, the excess profile is removed, and the mold is simplified.

[0042] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. Here, it is not necessary and also impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application claim.

Claims

1. An improvement in a forming die for a roll flanging process, characterized by The utility model relates to a bending die, which comprises a fixed seat (1), a bending concave die (2), a bending convex die (3) and a pressing plate (4), wherein: The fixed seat (1) is installed on a lower die seat; The bending concave die (2) is fixed on the fixed seat (1), and a convex rib (21) is arranged on the bending concave die (2), the first side surface of the convex rib (21) is a first flanging surface (22), and the top surface of the convex rib (21) is a round corner surface (23); The bending convex die (3) is installed on an upper die seat that is closed with the lower die seat, and a second flanging surface (31) matched with the first flanging surface (22), a round corner cavity (32) matched with the round corner surface (23) and a first pressing surface (33) are arranged on the bending convex die (3); The pressing plate (4) is located on one side of the bending concave die (2) and below the bending convex die (3), a spring (5) is arranged between the pressing plate (4) and the fixed seat (1), and a second pressing surface (41) matched with the first pressing surface (33) is arranged on the pressing plate (4).

2. The improvement in a roll flange forming die according to claim 1, wherein The second side surface of the convex rib (21) is an extension surface (24), the round corner surface (23) is smoothly connected with the first flanging surface (22) and the extension surface (24) respectively, and the end of a workpiece (6) to be rounded extends to the extension surface (24).

3. The improvement in a roll flange forming die according to claim 2, wherein The included angle between the extension surface (24) and the first flanging surface (22) is 15-25 degrees, and the central angle of the cross-section circular arc of the round corner surface (23) is 155-165 degrees.

4. The improvement according to claim 1, wherein The first flanging surface (22) and the second flanging surface (31) are both vertical surfaces, and the first pressing surface (33) and the second pressing surface (41) are both inclined surfaces with an angle of 5-10 degrees with the horizontal surface.

5. The improvement according to claim 1, wherein The first flanging surface (22) is flush with the side surface of the bending concave die (2), and the surface of the pressing plate (4) close to the bending concave die (2) is flush with the second flanging surface (31).

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