Punching die structure capable of completing multi-angle continuous traceless bending at one time

Abstract

The utility model discloses a stamping die structure capable of completing multi-angle continuous traceless bending at one time, a lower die is provided with a forming block, an upper die is provided with a material pressing block and two punches, the two punches are both of a cylindrical structure and are horizontally arranged at the lower end of the upper die, each punch is provided with two inclined planes and a forming protrusion, the two punches can turn over under the pushing of the material pressing block, and the two inclined planes and the forming protrusion are arranged on the lower end portion of the upper die. And the forming block is matched with the forming block to form two times of bending on the plate in sequence. According to the utility model, a bending structure and a side wall can be rolled and formed on a plate in sequence through the rotation of the punch in the one-time die assembly process, the forming efficiency is high, the internal stress of the plate is uniformly distributed, cracks or fractures are not easy to form, the size is stable, the forming quality is higher, and the continuous production of the die can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of punching machines, in particular to a punching die structure capable of completing multi-angle continuous and traceless bending at one time. Background Art

[0002] In the production of sheet metal bending using stamping dies, generally one stamping action will form a fixed angle bend on the product. If the product has bends at different angles, it generally requires multiple stamping and bending to finally form it. However, there are two common problems with multiple stamping and bending actions. First, the stress left on the product by the secondary bend is likely to affect the primary bend, causing the bending angle to change. Second, after the sheet metal is subjected to multiple force bends, the stress accumulated inside the material will cause cracks or even breakage in the sheet metal. Both of these will directly lead to abnormal product quality. Utility Model Content

[0003] In view of the problems existing in the above-mentioned prior art, the utility model provides a die structure which can complete multi-angle continuous and seamless bending at one time. The bending structure and the side wall can be successively rolled and formed on the sheet material by the rotation of the punch during one die closing process. The forming efficiency is high, the internal stress distribution of the sheet material is uniform, it is not easy to form cracks or fractures, the size is stable, the forming quality is high, and continuous production of the mold can be realized.

[0004] In order to solve the above technical problems, a technical solution adopted by the utility model is as follows:

[0005] A punching die structure capable of completing multi-angle continuous and seamless bending at one time, wherein an upper die and a lower die are arranged on the punching die, a forming block is arranged on the lower die, and a pressing block and two punches are arranged on the upper die above the forming block; wherein,

[0006] The forming block is a T-shaped structure or a trapezoidal structure with a larger top and a smaller bottom, and the connection between the upper end surface and the two side walls is provided with a rounded corner;

[0007] The pressing block is in a non-right-angle trapezoidal structure and is arranged directly above the forming block, and the contour of its pressing end falls on the inner side of the upper end surface of the forming block;

[0008] The two punches are both cylindrical structures and are horizontally installed at the lower end of the upper die, each of the punches is located above one side wall of the pressure block, one side of its outer wall is elastically connected to the upper die, and the other side of the outer wall faces the pressure block and is provided with a forming part that axially penetrates the punch, and the forming part is formed with a first inclined surface and a second inclined surface that intersect, the first inclined surface is close to the lower die and an axially extending forming protrusion is provided at the end thereof; when the mold is closed, the pressure block first presses the sheet material, and can synchronously push the two punches to flip toward the outside during the process of the upper die driving the two punches to move continuously downward, so that the forming protrusion cooperates with the fillet to form a bending structure on the sheet material, and the sheet material is bent to form a side wall under the push of the first inclined surface.

[0009] As a further elaboration of the above technical solution:

[0010] In the above technical solution, a first avoidance groove is formed on the first inclined surface beside the forming protrusion, and the first avoidance groove is smoothly connected with the forming protrusion; the second inclined surface is close to the upper die and a second avoidance groove is provided at its end; the first inclined surface and the second inclined surface are smoothly connected. In the above technical solution, a punch fixing block is also provided at the lower end of the upper die, and two first elastic members are mounted on it, and the two ends of each of the first elastic members are respectively connected to the punch fixing block and one of the punches in a transmission manner; the central axis of each of the first elastic members does not intersect with the central axis of the punch.

[0011] In the above technical solution, the lower end of the punch fixing block is provided with a third avoidance groove, two slide grooves and two fourth avoidance grooves which are interconnected. The third avoidance groove is adapted to the material pressing block. The two slide grooves are respectively arranged on both sides of the third avoidance groove and can be respectively equipped with one of the punches. Both of the slide grooves are arc-shaped slide grooves and their diameters are greater than the diameter of the punch. The two fourth avoidance grooves are respectively detachably fixed with one of the first elastic members.

[0012] In the above technical solution, a clamping groove is provided on the side wall of each punch, and a positioning piece capable of clamping and fixing the first elastic piece is provided in each clamping groove.

[0013] In the above technical solution, each of the first elastic members is a spring.

[0014] In the above technical solution, the pressing block is transmission-connected to the second elastic member provided on the upper die.

[0015] In the above technical solution, the second elastic member is a nitrogen spring.

[0016] Compared with the prior art, the beneficial effects of the utility model are: by setting the punch as a rolling structure, arranging a forming part on the side of the punch facing the pressing block and the forming block, and arranging two inclined surfaces and a forming protrusion on the forming part, the bending structure and the side wall can be successively rolled and formed on the sheet material by the rotation of the punch during one mold closing process, and the forming efficiency is high. Moreover, due to the continuous forming, the internal stress distribution of the sheet material is uniform, and it is not easy to form cracks or fractures, the size is stable, and the forming quality is high; by arranging the first avoidance groove and the second avoidance groove on the punch, a certain avoidance space can be provided for the sheet material in the early stage of being bent and deformed, so as to release and disperse the stress and avoid the fracture or cracks of the sheet material; by arranging the first elastic member, it can be compressed and pull the punch when the punch rotates, and can push the punch to rotate and reset when the mold is opened, so as to realize the continuous production of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the structure of the workpiece in this embodiment;

[0018] Figure 2 This is a schematic diagram of the structure of the first bend during mold closing in this embodiment;

[0019] Figure 3 This is a schematic structural diagram of the second bending during mold closing in this embodiment;

[0020] Figure 4 Schematic diagram of the cross-sectional structure of the punch in this embodiment;

[0021] Figure 5 It is a front view structural schematic diagram of the punch fixing block in this embodiment.

[0022] In the figure: 10, forming block; 11, fillet; 20, pressing block; 30, punch; 31, forming part; 32, slot; 40, punch fixing block; 41, third avoidance groove; 42, slide groove; 43, fourth avoidance groove; 1, first inclined surface; 2, second inclined surface; 3, forming protrusion; 4, first avoidance groove; 5, second avoidance groove; 6, first elastic member. DETAILED DESCRIPTION

[0023] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0024] The embodiments described with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and cannot be understood as limiting the present application. In the description of the present application, 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 indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application 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 application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, "several" and "multiple" mean two or more, unless otherwise clearly and specifically defined. In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it 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 it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. In this application, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature can include the first and second features being in direct contact, or it can include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0025] To facilitate understanding of the present invention, Figure 1 The structural schematic diagram of the product in this embodiment is shown. It can be seen that both side walls are bent downward and the ends form an inward-facing structure. If the conventional production process of bending at an angle in sequence is adopted, the side wall molding process requires at least two bending steps before it can be formed, and the two molding steps cannot be completed at the same production station, and the mold cost and production cost are relatively high.

[0026] like Figure 1-4As shown, a punching die structure capable of completing multi-angle continuous and seamless bending at one time, wherein an upper die and a lower die are provided on the punching die, a forming block 10 is provided on the lower die, and a pressing block 20 and two punches 30 are provided on the upper die above the forming block 10; wherein:

[0027] The forming block 10 is a T-shaped structure or a trapezoidal structure with a larger top and a smaller bottom, and the connection between the upper end surface and the two side walls thereof is provided with a rounded corner 11;

[0028] The pressing block 20 is of a non-right-angle trapezoidal structure and is disposed directly above the forming block 10, and the contour of its pressing end falls on the inner side of the upper end surface of the forming block 10;

[0029] The two punches 30 are both cylindrical in structure and are horizontally mounted at the lower end of the upper die. Each punch 30 is located above one side wall of the pressure block 20. One side of the outer wall is elastically connected to the upper die. The other side of the outer wall faces the pressure block 20 and is provided with a forming portion 31 that axially penetrates the punch. The forming portion 31 is formed with an intersecting first inclined surface 1 and a second inclined surface 2. The first inclined surface 1 is close to the lower die and an axially extending forming protrusion 3 is provided at the end thereof. When the die is closed, the pressure block 20 first presses the sheet material, and can simultaneously push the two punches 30 to flip outward while the upper die drives the two punches 30 to move continuously downward, so that the forming protrusion 3 cooperates with the fillet 11 to form a bending structure on the sheet material, and the sheet material is bent to form a side wall under the push of the first inclined surface 1.

[0030] The utility model sets the punch 30 as a rolling structure, sets a forming part 31 on the side of the punch 30 facing the pressing block 20 and the forming block 10, and sets two inclined surfaces and a forming protrusion 3 on the forming part 31. In a single mold closing process, the bending structure and the side wall can be successively rolled and formed on the sheet material by the rotation of the punch 30. The forming efficiency is high, and because of the continuous forming, the internal stress distribution of the sheet material is uniform, it is not easy to form cracks or fractures, the size is stable, and the forming quality is high.

[0031] Specifically, Figure 4 As shown, a first avoidance groove 4 is formed on the first inclined surface 1 beside the molding protrusion 3, and the first avoidance groove 4 is smoothly connected with the molding protrusion 3; the second inclined surface 2 is close to the upper die and a second avoidance groove 5 is provided at its end; the first inclined surface 1 and the second inclined surface 2 are smoothly connected; a clamping groove 32 is provided on the side wall of each punch 30, and a positioning member capable of clamping a first elastic member 6 is provided in each clamping groove 32. In this embodiment, each first elastic member 6 is a spring.

[0032] It can be understood that when the end of the sheet is bent and formed by the forming protrusion 3, the sheet on its side will warp upward, and the first avoidance groove 4 provides a certain avoidance space for the warping deformation of the sheet, which plays a role in releasing and dispersing stress, thereby avoiding the sheet from breaking or cracking; similarly, when the first inclined surface 1 rolls the sheet, the second avoidance groove 5 provides an avoidance space for the secondary deformation of the sheet, dispersing the internal stress of the sheet, thereby avoiding the sheet from breaking or cracking.

[0033] Specifically, Figure 5 As shown, a punch fixing block 40 is also provided at the lower end of the upper die, on which two first elastic members 6 are mounted, and the two ends of each first elastic member 6 are respectively transmission-connected with the punch fixing block 40 and a punch 30; the central axis of each first elastic member 6 does not intersect with the central axis of the punch 30; the lower end of the punch fixing block 40 is provided with a third avoidance groove 41, two slide grooves 42 and two fourth avoidance grooves 43 which are interconnected, the third avoidance groove 41 is adapted to the pressing block 20, the two slide grooves 42 are respectively arranged on both sides of the third avoidance groove 41 and can respectively mount a punch 30, the two slide grooves 42 are both arc-shaped slide grooves and their diameters are both larger than the diameter of the punch 30, and a first elastic member 6 is respectively detachably fixed in the two fourth avoidance grooves 43.

[0034] It is understandable that the first elastic member 6 can be compressed and pull the punch 30 when the punch 30 rotates, and can push the punch 30 to rotate and reset when the mold is opened, so as to achieve continuous production of the mold.

[0035] In this embodiment, the pressing block 20 is transmission-connected to a second elastic member provided on the upper die, and the second elastic member is a nitrogen spring.

[0036] The above does not limit the technical scope of the present invention. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A punching die structure capable of completing multi-angle continuous and seamless bending at one time, wherein the punching die is provided with an upper die and a lower die, the lower die is provided with a forming block, and the upper die is provided with a pressing block and two punches above the forming block; characterized in that: The forming block is a T-shaped structure or a trapezoidal structure with a larger top and a smaller bottom, and the connection between the upper end surface and the two side walls is provided with a rounded corner; The pressing block is in a non-right-angle trapezoidal structure and is arranged directly above the forming block, and the contour of its pressing end falls on the inner side of the upper end surface of the forming block; The two punches are both cylindrical structures and are horizontally installed at the lower end of the upper die, each of the punches is located above one side wall of the pressure block, one side of its outer wall is elastically connected to the upper die, and the other side of the outer wall faces the pressure block and is provided with a forming part that axially penetrates the punch, and the forming part is formed with a first inclined surface and a second inclined surface that intersect, the first inclined surface is close to the lower die and an axially extending forming protrusion is provided at the end thereof; when the die is closed, the pressure block first presses the sheet material, and the upper die drives the two punches to move downward continuously and simultaneously pushes the two punches to flip outward, so that the forming protrusion cooperates with the fillet to form a bending structure on the sheet material, and the sheet material is bent to form a side wall under the push of the first inclined surface.

2. According to claim 1, a punching die structure capable of completing multi-angle continuous and seamless bending at one time is characterized in that: A first avoidance groove is also formed on the first inclined surface beside the forming protrusion, and the first avoidance groove is smoothly connected to the forming protrusion; the second inclined surface is close to the upper mold and a second avoidance groove is provided at its end; the first inclined surface and the second inclined surface are smoothly connected.

3. The die structure capable of completing multi-angle continuous and seamless bending at one time according to claim 1, characterized in that: The lower end of the upper die is also provided with a punch fixing block, on which two first elastic members are mounted, and the two ends of each of the first elastic members are respectively connected to the punch fixing block and one of the punches in a transmission manner; the central axis of each of the first elastic members does not intersect with the central axis of the punch.

4. A die structure capable of completing multi-angle continuous and seamless bending at one time according to claim 3, characterized in that: The lower end of the punch fixing block is provided with a third avoidance groove, two slide grooves and two fourth avoidance grooves which are interconnected. The third avoidance groove is adapted to the material pressing block. The two slide grooves are respectively arranged on both sides of the third avoidance groove and can respectively install one of the punches. Both of the slide grooves are arc-shaped slide grooves and their diameters are greater than the diameter of the punch. One of the first elastic members is detachably fixed in each of the two fourth avoidance grooves.

5. The die structure capable of completing multi-angle continuous and seamless bending at one time according to claim 3, characterized in that: A clamping groove is provided on the side wall of each punch, and a positioning piece capable of clamping and fixing the first elastic piece is provided in each clamping groove.

6. The die structure capable of completing multi-angle continuous and seamless bending at one time according to claim 3, characterized in that: Each of the first elastic members is a spring.

7. A die structure capable of completing multi-angle continuous and seamless bending at one time according to any one of claims 1 to 6, characterized in that: The pressing block is transmission-connected with a second elastic member arranged on the upper die.

8. The die structure capable of completing multi-angle continuous and seamless bending at one time according to claim 7, characterized in that: The second elastic member is a nitrogen spring.

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