Elastic extrusion metal shell bending die

Abstract

The utility model discloses an elastic extrusion metal shell bending die. The elastic extrusion metal shell bending die comprises an upper die base, a lower die base and an end corner buffering assembly. The middle of an upper base plate of the upper die base is in threaded connection with an upper male die, the four ends of the upper base plate are in floating connection with an upper floating stripper plate through vertical buffering telescopic assemblies, and a middle through hole of the upper floating stripper plate is in vertical sliding connection with the upper male die. The four ends of a lower base plate of the lower die base are in threaded connection with a lower floating stripper plate, the middle of the lower base plate is connected with an upper lower female die through a vertical buffering telescopic assembly, and the lower female die is vertically connected to a forming cavity of the lower floating stripper plate in a sliding mode. An elastic pressing block of the end corner buffering assembly is placed in a buffering groove in each end corner of the forming cavity, and the lower end of the elastic pressing block is sleeved with a plane offset spring. The utility model has the effects that the upper and lower parts and the end corners are elastically buffered and extruded, the elastic material pressing state is always maintained, the shell is uniform in thickness and free of wrinkles, and the product yield is high.

Description

Technical Field

[0001] The utility model relates to a forming device for a metal shell, in particular to an elastic extrusion metal shell bending die. Background Art

[0002] With the development of 3C products, the requirements for the precision and performance of 3C metal shells are getting higher and higher. The existing processing mode is direct stamping, which has the following defects: First, direct stamping is a hard processing, and it is difficult for the part material to flow sufficiently, resulting in uneven thickness, and it is easy for the shell to be cracked and deformed, and the product yield is difficult to guarantee; second, the hardness of the material is concentrated at the end corners, which is easy to form wrinkles, the product precision is poor, and the aesthetics is low, which further reduces the product yield; third, hard extrusion can easily damage the mold, and the mold needs to be replaced frequently, resulting in mid-production, low production efficiency, and high production costs. Utility Model Content

[0003] In order to solve one or more of the above problems, the utility model provides an elastic extrusion metal shell bending die.

[0004] According to one aspect of the utility model, the elastic extrusion metal shell bending die comprises: an upper die base, a lower die base and an end angle buffer assembly;

[0005] The upper die base comprises an upper male die, an upper floating stripper plate and an upper base plate. The middle lower thread of the upper base plate is connected to the upper male die and the lower ends thereof are floatingly connected to the upper floating stripper plate through vertical buffer telescopic components. The middle through hole of the upper floating stripper plate is vertically slidably connected to the upper male die.

[0006] The lower die base includes a lower female die, a lower floating stripper plate and a lower base plate; the four ends of the lower base plate are threadedly connected to the lower floating stripper plate and the middle is connected to the upper lower female die through a vertical buffer telescopic assembly; the lower female die is vertically slidably connected to the molding cavity of the lower floating stripper plate, and the lower female die and the upper male die are opposite to each other and the surface contours are fitted;

[0007] The elastic pressing block of the end angle buffer assembly is placed in the buffer groove at each end angle of the forming cavity, and the plane of the shaft sleeve at the lower end of the elastic pressing block is offset by a spring;

[0008] The blank is placed on the lower mother mold, with the four end corners of the blank fitting with elastic pressing blocks below and the upper floating stripper plate facing the upper part. The upper mold base moves downward, and the upper floating stripper plate presses the edges of the blank. The upper male mold presses the middle of the blank and the lower mother mold moves downward, so that the blank is bent along the forming cavity, and the inner side of the elastic pressing block is always elastically fitted with the bending end corners of the blank.

[0009] In some embodiments, a positioning column is provided in the middle of the upper male mold, and a positioning hole corresponding to the positioning column is provided in the middle of the lower female mold.

[0010] In some embodiments, a first floating spring is sleeved under the upper end cap of the positioning column, and the first floating spring is sleeved in the middle guide hole of the upper base plate.

[0011] In some embodiments, the upper mold base further comprises an upper seat plate, the upper surface of the upper base plate is threadedly connected to the upper seat plate, and a driving assembly is mounted on the upper seat plate;

[0012] The lower die base also includes a lower seat plate, the upper surface of the lower base plate is connected to the lower seat plate by threads, and the lower seat plate is fixedly arranged on the machine base;

[0013] The upper seat plate and the lower seat plate are connected via a guide assembly which slides relatively up and down.

[0014] In some embodiments, the driving assembly is any one of a pneumatic cylinder, a servo rod, and a hydraulic cylinder;

[0015] The guide assembly is a cylindrical guide rail and a linear bearing that cooperate with each other.

[0016] In some embodiments, the vertical buffer telescopic assembly includes a connecting guide column and a second floating spring, wherein the second floating spring is sleeved in an upper guide hole of the upper substrate or a lower guide hole of the lower substrate; the other end of the connecting guide column is sleeved with the second floating spring;

[0017] Or a positioning ring is provided in the middle of the connecting guide column, and the second floating spring is in contact with the positioning ring.

[0018] In some embodiments, the planar biasing spring is a spherical spring;

[0019] Or the plane offset spring is an XY translation spring. The plane offset spring includes a small ring and a large ring that are concentrically sleeved with each other. The two are connected by a number of elastic narrow sheets in a circular array. The middle column of the elastic pressure block fixes the center hole of the small ring, and the outer ring wall of the large ring is sleeved in the offset groove at the lower end of the buffer groove.

[0020] In some embodiments, the inner side surface of the buffer body of the elastic pressing block is provided with a rounded surface matching the end angle of the blank.

[0021] In some embodiments, a convex end with a large diameter is further provided at the lower end of the elastic pressing block, the diameter of the convex end is larger than the diameter of the offset groove, and the convex end is slidably connected to the limiting groove at the lower end of the offset groove.

[0022] In some embodiments, the male end is threaded under the intermediate post.

[0023] The device adopts elastic pressure blocks and plane offset springs to perform elastic buffering and extrusion at the end corners, and always maintains the pressing state. The upper and lower die seats are equipped with vertical buffering telescopic components to realize elastic stamping, and its beneficial effects are: elastic stamping, sufficient flow of shell material, uniform shell thickness, no cracking and deformation, and high product yield rate; secondly, elastic pressure blocks for lateral elastic compression are added at the end corners, which effectively reduces the hardness concentration of the material, evenly distributes the material, and the end corners of the product are wrinkle-free and have high smoothness and uniformity, with overall beauty, further improving the yield rate; thirdly, upper and lower elastic extrusion and lateral elastic compression effectively protect the mold, increase the life of the mold, reduce maintenance downtime, high productivity, and effectively reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a cross-sectional schematic diagram of an elastic extrusion metal shell bending die according to one embodiment of the utility model;

[0025] Figure 2 for Figure 1 A partially enlarged schematic diagram of an elastic extrusion metal shell bending die is shown;

[0026] Figure 3 for Figure 2 A schematic top view of the planar deflection spring shown;

[0027] Figure 4 for Figure 1 A schematic top view of the lower die base shown;

[0028] Upper die base 01, upper male die 1, upper floating stripper plate 3, middle through hole 31, upper base plate 5, middle guide hole 51, upper guide hole 52, positioning column 9, first floating spring 10, upper pad 11, upper seat plate 13;

[0029] Lower die base 02, lower mother die 2, positioning hole 201, lower floating stripper plate 4, molding cavity 40, buffer groove 41, offset groove 42, limit groove 43, lower base plate 6, lower guide hole 61, lower pad 12, lower seat plate 14;

[0030] End angle buffer assembly 03, elastic pressing block 7, middle column 71, buffer body 72, rounded surface 73, convex end 74, plane offset spring 8, small circular ring 81, large circular ring 82, elastic narrow piece 83;

[0031] Vertical buffer telescopic assembly 04, connecting guide column 041, second floating spring 042, positioning ring 043;

[0032] Driving component 05; guiding component 06. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0034] Figures 1 to 4 A schematic diagram of an elastic extrusion metal shell bending die according to an embodiment of the utility model is shown. As shown in the figure, the elastic extrusion metal shell bending die includes: an upper die base 01, a lower die base 02 and an end angle buffer component 03;

[0035] The upper mold base 01 includes an upper male mold 1, an upper floating stripper plate 3 and an upper base plate 5. The middle lower thread of the upper base plate 4 is connected to the upper male mold 1 and the lower four ends thereof are floatingly connected to the upper floating stripper plate 3 through a vertical buffer telescopic assembly 04. The middle through hole 31 of the upper floating stripper plate 3 is vertically slidably connected to the upper male mold 1.

[0036] The lower mold base 02 includes a lower female mold 2, a lower floating stripper plate 4 and a lower base plate 6; the lower base plate 6 is threadedly connected to the lower floating stripper plate 4 at four ends and connected to the upper lower female mold 2 through a vertical buffer telescopic component 04 in the middle; the lower female mold 2 is vertically slidably connected to the molding cavity 40 of the lower floating stripper plate 4, and the lower female mold 2 and the upper male mold 1 are opposite to each other and the surface contours are matched;

[0037] The elastic pressing block 7 of the end corner buffer assembly 03 is placed in the buffer groove 41 at each end corner of the molding cavity 40, and the lower end of the elastic pressing block 7 is offset by a plane spring 8;

[0038] The blank is placed on the lower mother mold 2, with the four end corners of the blank fitted with elastic pressure blocks 7 below and the upper floating stripper plate 3 facing the upper part, the upper mold base 01 moves downward, the upper floating stripper plate 3 presses the edges of the blank, the upper male mold 1 presses the middle of the blank and the lower mother mold 2 moves downward, so that the blank is bent along the forming cavity 40, and the inner side of the elastic pressure block 7 is always elastically fitted with the bent end corners of the blank.

[0039] The device adopts an elastic pressure block 7 and a plane offset spring 8 to perform elastic buffering and extrusion at the end corners, and always maintains the pressing state. The upper and lower die seats are both provided with a vertical buffering telescopic component 04 to realize elastic stamping, and its beneficial effects are: elastic stamping, sufficient flow of shell material, uniform thickness of shell, no cracking and deformation, and high product yield rate; secondly, an elastic pressure block 7 for lateral elastic compression is added at the end corners, which effectively reduces the hardness concentration of the material, evenly distributes the material, has no wrinkles at the end corners of the product, has a high degree of smoothness and uniformity, and is beautiful as a whole, further improving the yield rate; thirdly, upper and lower elastic extrusion and lateral elastic compression effectively protect the mold, increase the life of the mold, reduce the downtime during maintenance, have high productivity, and effectively reduce production costs.

[0040] Furthermore, a positioning column 9 is provided in the middle of the upper male mold 1, and a positioning hole 201 corresponding to the positioning column 9 is provided in the middle of the lower female mold 2. Preferably, the upper end of the positioning column 9 is slidably connected to the middle guide hole 51 of the upper base plate 5, and the lower end thereof is slidably sleeved in the middle hole of the upper male mold 1. Preferably, a first floating spring 10 is also sleeved under the upper end cap of the positioning column 9, and the first floating spring 10 is sleeved in the middle guide hole 51; the middle guide hole 51 is a stepped through hole, and the upper step hole thereof is larger than the lower step hole. Its beneficial effect is: the elastically adjustable positioning structure effectively ensures the processing accuracy.

[0041] Further, the upper die base 02 further includes an upper seat plate 13, the upper surface of the upper base plate 5 is connected to the upper seat plate 13 by threads, and the drive assembly 05 is installed on the upper seat plate 13;

[0042] The lower die base 02 also includes a lower seat plate 14, the upper surface of the lower base plate 6 is connected to the lower seat plate 14 by threads, and the lower seat plate 14 is fixedly arranged on the machine base;

[0043] The upper seat plate 13 and the lower seat plate 14 are connected via a guide assembly 06 that slides relatively up and down.

[0044] Preferably, an upper pad 11 is provided between the upper base plate 5 and the upper male mold 1, and a lower pad 12 is connected to the lower surface of the lower female mold 2. The beneficial effect is that the structure can ensure a high-precision stamping effect.

[0045] Preferably, the driving component 05 is any one of a pneumatic cylinder, a servo rod and a hydraulic cylinder;

[0046] The guide assembly 06 is a cylindrical guide rail and a linear bearing that cooperate with each other. Its beneficial effect is that this arrangement can output high-precision linear punching motion.

[0047] Furthermore, the vertical buffer telescopic assembly 04 includes a connecting guide column 041 and a second floating spring 042. The second floating spring 042 is sleeved in the upper guide hole 52 of the upper base plate 5 or the lower guide hole 61 of the lower base plate 6; the lower end of the connecting guide column 041 is fixedly connected to the lower floating stripping plate 4 or the upper end is fixedly connected to the upper floating stripping plate 3; the other end of the connecting guide column 041 is sleeved with the second floating spring 042. Preferably, the lower guide hole 61 and the upper guide hole 52 are stepped through holes, and the end holes thereof for placing the second floating spring 042 are large diameter holes; preferably, a positioning ring 043 is provided in the middle of the connecting guide column 041, and the second floating spring 042 fits the positioning ring 043. Its beneficial effect is that the vertical buffer telescopic assembly 04 can effectively realize elastic extrusion of materials and avoid hard extrusion effects.

[0048] Furthermore, the inner side surface of the buffer body 72 of the elastic pressing block 7 is provided with a rounded surface 73 matching the end angle of the blank. The beneficial effect is that the structure can ensure uniform extrusion deformation of the end angle.

[0049] Preferably, the material of the elastic pressing block 7 and the material of the bending pressing block 7 are nylon blocks, polytetrafluoroethylene blocks or die steel.

[0050] Preferably, the plane offset spring 8 is a spherical spring; the beneficial effect thereof is that the spherical spring has good three-way elasticity, achieving precise translation and rapid resetting.

[0051] Preferably, the plane deflection spring 8 is an XY translation spring, and the plane deflection spring 8 comprises a small circular ring 81 and a large circular ring 82 which are concentrically sleeved with each other, and the two are connected by a plurality of elastic narrow sheets 83 in a circumferential array, and the middle column 71 of the elastic pressing block 7 fixes the center hole of the small circular ring 81, and the outer ring wall of the large circular ring 82 is sleeved in the deflection groove 42 at the lower end of the buffer groove 41. The beneficial effect is that the spring has the effect of realizing precise translation and rapid reset, and the deformation size is large.

[0052] Preferably, the lower end of the elastic pressing block 7 is also provided with a convex end head 74 with a large diameter, the diameter of the convex end head 74 is larger than the diameter of the offset groove 42, and the convex end head 74 is slidably connected to the limiting groove 43 at the lower end of the offset groove 42. Preferably, the convex end head 74 is threadedly connected under the middle column 71. The beneficial effect is that the structure realizes a good axial limiting effect without shaking.

[0053] The first floating spring 10 and the second floating spring 042 are excellent wave springs. The beneficial effect is that the wave spring is particularly suitable for scenes where weight reduction is required and the installation space is small, and can greatly reduce the volume of the product.

[0054] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. An elastic extrusion metal shell bending die, characterized in that: It comprises: an upper die base (01), a lower die base (02) and an end angle buffer assembly (03); The upper die base (01) comprises an upper male die (1), an upper floating stripper plate (3) and an upper base plate (5). The middle lower thread of the upper base plate (5) is connected to the upper male mold (1) and the lower four ends thereof are floatingly connected to the upper floating stripping plate (3) through vertical buffer telescopic components (04); the middle through hole (31) of the upper floating stripping plate (3) is vertically slidably connected to the upper male mold (1); The lower mold base (02) comprises a lower mother mold (2), a lower floating stripper plate (4) and a lower base plate (6); the four ends of the lower base plate (6) are threadedly connected to the lower floating stripper plate (4) and the middle is connected to the upper lower mother mold (2) through the vertical buffer telescopic component (04); the lower mother mold (2) is vertically slidably connected to the molding cavity (40) of the lower floating stripper plate (4); the lower mother mold (2) and the upper male mold (1) are opposite to each other in the upper and lower directions and their surface contours are matched; The elastic pressing block (7) of the end corner buffer assembly (03) is placed in a buffer groove (41) at each end corner of the molding cavity (40), and the lower end of the elastic pressing block (7) is provided with a plane offset spring (8) on the shaft sleeve.

2. The elastic extrusion metal shell bending die according to claim 1, characterized in that: A positioning column (9) is provided in the middle of the upper male mold (1), and a positioning hole (201) corresponding to the positioning column (9) is provided in the middle of the lower female mold (2).

3. The elastic extrusion metal shell bending die according to claim 2, characterized in that: A first floating spring (10) is sleeved under the upper end cap of the positioning column (9), and the first floating spring (10) is sleeved in the middle guide hole (51) of the upper base plate (5).

4. The elastic extrusion metal shell bending die according to claim 1, characterized in that: The upper die base (01) further comprises an upper seat plate (13), the upper surface of the upper base plate (5) being threadedly connected to the upper seat plate (13), and a driving assembly (05) being mounted on the upper seat plate (13); The lower die base (02) further comprises a lower seat plate (14), the upper surface of the lower base plate (6) being threadedly connected to the lower seat plate (14), and the lower seat plate (14) being fixedly arranged on the machine base; The upper seat plate (13) and the lower seat plate (14) are connected via a guide assembly (06) that slides relatively up and down.

5. The elastic extrusion metal shell bending die according to claim 4, characterized in that: The driving component (05) is any one of a pneumatic cylinder, a servo rod and a hydraulic cylinder; The guide assembly (06) is a cylindrical guide rail and a linear bearing that cooperate with each other.

6. The elastic extrusion metal shell bending die according to claim 1, characterized in that: The vertical buffer telescopic assembly (04) comprises a connecting guide column (041) and a second floating spring (042); the second floating spring (042) is sleeved in an upper guide hole (52) of the upper base plate (5) or a lower guide hole (61) of the lower base plate (6); the other end of the connecting guide column (041) is sleeved in the second floating spring (042); Or a positioning ring (043) is provided in the middle of the connecting guide column (041), and the second floating spring (042) fits the positioning ring (043).

7. The elastic extrusion metal shell bending die according to claim 1, characterized in that: The plane deflection spring (8) is a spherical spring; Or the plane deflection spring (8) comprises a small circular ring (81) and a large circular ring (82) which are coaxially sleeved with each other, and the two are connected by a plurality of elastic narrow sheets (83) in a circumferential array.

8. The elastic extrusion metal shell bending die according to claim 1, characterized in that: The inner side surface of the buffer body (72) of the elastic pressing block (7) is provided with a rounded corner surface (73) matching the end angle of the blank.

9. The elastic extrusion metal shell bending die according to claim 8, characterized in that: The lower end of the elastic pressing block (7) is also provided with a convex end head (74) having a diameter greater than the diameter of the offset groove (42), and the convex end head (74) is slidably connected to the limiting groove (43) at the lower end of the offset groove (42).

10. The elastic extrusion metal shell bending die according to claim 9, characterized in that: The male end (74) is threadedly connected under the middle column (71).

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