Sheet metal bending forming die capable of reducing appearance indentations

Abstract

The utility model discloses a metal plate bending forming die capable of reducing appearance indentations. The metal plate bending forming die comprises a machine body, a V-shaped groove formed in the top of the machine body and two arc-shaped grooves formed in the top of the machine body and distributed on the two sides of the V-shaped groove. The device further comprises a plurality of elastic reset assemblies arranged in the device body, each elastic reset assembly comprises two groove body structures, and each groove body structure comprises a vertical groove formed in the middle of the device body and a through groove formed in the side wall of the device body. The mounting rod is arranged at the lower part of the machine body, a spring is arranged in each vertical groove, a hook part at the bottom end of the spring is hooked with the mounting rod, and a hook part at the top end of the spring penetrates through a mounting hole in which a lower die pressing shaft is positioned. By means of the structural characteristic that the sheet metal workpiece and the shaft body where the lower die pressing shaft is located do not slide relatively in the whole bending process, the problem that indentations exist in the sheet metal bending process is effectively solved, and the bending quality of the sheet metal workpiece is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sheet metal manufacturing, in particular to a sheet metal bending forming die capable of reducing appearance indentations. Background Art

[0002] The basic principle of sheet metal bending technology is to use the plastic deformation of metal to manufacture parts or components of the required shape and size. During the bending process, the metal sheet undergoes a series of bending, forming, welding and other processes to gradually form the required shape and size; for example, the aluminum layer, which is a pure aluminum protective film used as an aircraft aluminum alloy sheet to improve the corrosion resistance of the product, often needs to be bent during its processing. The bending mold currently used is usually composed of an upper mold tool and a lower mold V-groove, and this method has the following disadvantages in actual use:

[0003] First, during the bending and pulling process, the sheet metal is subjected to the friction and extrusion of the two ends of the lower die V-groove, which is very easy to cause indentations, affecting the appearance of the product and often failing to meet the customer's appearance requirements;

[0004] Secondly, in order to solve the above problem, the appearance indentation problem is solved by padding a cloth strip or sticking a tape on the lower mold, but this method is easy to affect the integrity of the mold. At the same time, the cloth strip or tape is easy to wear and need to be replaced frequently. The replacement process is cumbersome, which affects work efficiency and is difficult to promote on a large scale. Therefore, a sheet metal bending forming mold that reduces appearance indentation is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a sheet metal bending forming die with reduced appearance indentations. The structural characteristics of the sheet metal workpiece and the shaft body where the lower die pressing shaft is located do not produce relative sliding during the entire bending process, which effectively solves the problem of indentations in sheet metal bending processing and improves the bending quality of the sheet metal workpiece.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sheet metal bending forming mold for reducing appearance indentations, comprising: a body, a V-shaped groove opened on the top of the body, and two arc grooves opened on the top of the body and distributed on both sides of the V-shaped groove, a lower mold pressure shaft slidably installed inside each of the arc grooves, which is composed of a shaft body, a mounting member and a mounting hole in the middle of the mounting member; also comprising a plurality of elastic reset components arranged inside the body, and each group of elastic reset components comprises two groove body structures, each groove body structure comprises a vertical groove opened in the middle of the body, and a through groove opened on the side wall of the body, and the through groove and the vertical groove are both connected to the arc groove; also comprising a mounting rod arranged at the lower part of the body, a spring arranged inside each of the vertical grooves, a hook at the bottom end of which is hooked with the mounting rod, and a hook at the top end thereof passes through the mounting hole where the lower mold pressure shaft is located and extends a distance.

[0007] Preferably, each of the lower die pressing shafts is semicircular in shape as a whole.

[0008] Preferably, the diameter of the mounting hole is larger than the diameter of the second hook portion penetrating therein.

[0009] Preferably, the shaft body where the two lower die pressing shafts are located is also fixed with edge limiting parts on the opposite sides thereof, and the edge limiting parts overlap with the top of the machine body.

[0010] Preferably, it also includes a mounting frame, which is composed of a base plate and a plurality of mounting frames arranged on the base plate, and the upper surface of the base plate is used for the installation of the body; and a telescopic connecting member arranged at the top of each of the mounting frames, and also includes an upper mold pressing block detachably installed on the plurality of telescopic connecting members, the bottom of the upper mold pressing block is used to press down the sheet metal workpiece and make the two lower mold pressing shafts dock with the V-shaped groove to form a lower mold V-groove.

[0011] Preferably, the upper mold block consists of a plate portion and a triangular portion.

[0012] Preferably, the telescopic connecting member includes two hydraulic telescopic rods installed on the top of the mounting frame, and a mounting plate fixed to the telescopic ends of the two hydraulic telescopic rods, a threaded groove opened in the middle of the mounting plate, in which a bolt is arranged; and also includes a threaded hole opened in the plate portion where the upper mold block is located.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] The utility model applies bending pressure to the sheet metal workpiece through the upper mold, so that the two sides of the sheet metal workpiece move with the movement of the two lower mold pressing shafts, so that the sheet metal workpiece does not slide relative to the shaft body where the lower mold pressing shaft is located during the entire bending process, thereby avoiding indentations and scratches on the surface of the sheet metal workpiece caused by the extrusion of the upper and lower molds, and significantly improving the bending quality of the sheet metal workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of Example 1;

[0016] Figure 2 for Figure 1 A side view structural schematic diagram of;

[0017] Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure in front view;

[0018] Figure 4 It is a structural schematic diagram of Example 2;

[0019] Figure 5 for Figure 4 A schematic diagram of the front view structure of

[0020] Figure 6 for Figure 5 A schematic diagram of the cross-sectional structure of;

[0021] Figure 7 for Figure 6 Schematic diagram of the local three-dimensional structure;

[0022] Figure 8 It is a schematic diagram of the partially enlarged structure of the tank structure.

[0023] In the figure: 1, bottom plate; 2, mounting frame; 3, machine body; 4, vertical groove; 5, arc groove; 6, mounting rod; 7, spring; 8, lower die pressing shaft; 801, shaft body; 802, mounting piece; 803, mounting hole; 9, V-shaped groove; 10, hydraulic telescopic rod; 11, mounting plate; 12, bolt; 13, upper die pressing block; 14, threaded groove; 15, through groove. DETAILED DESCRIPTION

[0024] In the description of the present utility model, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present utility model. The following is a detailed description of various embodiments of the present utility model in conjunction with the drawings.

[0025] Example 1

[0026] See also Figures 1 to 8 The utility model preferably provides a technical solution: a sheet metal bending forming die for reducing appearance indentation, comprising: a body 3, a V-shaped groove 9 opened on the top of the body 3, and two arc grooves 5 opened on the top of the body 3 and distributed on both sides of the V-shaped groove 9, a lower die pressing shaft 8 slidably installed inside each arc groove 5, which is composed of a shaft body 801, a mounting member 802 and a mounting hole 803 in the middle of the mounting member 802; it also includes a plurality of elastic reset components arranged inside the body 3, and each group of elastic reset components includes two groove structures, each groove structure includes a vertical groove 4 opened in the middle of the body 3, and a through groove 15 opened on the side wall of the body 3, and the through groove 15 and the vertical groove 4 are connected to the arc groove 5; it also includes a mounting rod 6 arranged at the lower part of the body 3, a spring 7 arranged inside each vertical groove 4, a hook at the bottom end of which is hooked with the mounting rod 6, and a hook at the top end thereof passes through the mounting hole 803 where the lower die pressing shaft 8 is located and extends a distance.

[0027] In this embodiment, the lower die pressing shaft 8 is composed of a shaft body 801, a mounting member 802 at the bottom of the shaft body 801, and a mounting hole 803 in the middle of the mounting member 802. Figure 3 , 7 As shown, the two lower die pressing shafts 8 are respectively slidably mounted inside the two arc grooves 5, and the two arc grooves 5 are distributed on both sides of the V-shaped groove 9. Combined with the plurality of elastic reset components arranged inside the body 3, it is known that each group of elastic reset components is composed of two groove structures, such as Figure 3 , 6 As shown, the vertical slot 4 and the through slot 15 where each slot structure is located are connected to the corresponding arc slot 5, and the spring 7 arranged in the vertical slot 4 has a hook portion at the bottom end connected to the mounting rod 6, and a hook portion at the top end thereof penetrates the mounting hole 803 where the lower die pressing shaft 8 is located and extends a distance, combined with Figure 8 As shown, when the sheet metal workpiece is placed on the surface of the two lower die pressing shafts 8, the initial state of the two shaft bodies 801 is as follows: Figure 1 As shown, at this time, as the upper mold is pressed downward, the opposite sides of the two lower mold pressing shafts 8 can move downward toward the middle and dock with the V-shaped groove 9 as the sheet metal workpiece is bent, and the opposite sides thereof move upward and outward to realize the process of docking the two shaft bodies 801 with the V-shaped groove 9 and forming the lower mold V-groove, further realizing the high-quality bending process of the sheet metal workpiece;

[0028] It is worth noting that the vertical groove 4 and the through groove 15 are both connected to the corresponding through groove 15. Figure 1 , 2 As shown in FIG. 5 , when the two lower die pressing shafts 8 are deflected outward, the spring 7 between the mounting hole 803 and the mounting rod 6 can be deformed synchronously to realize the reset process of the two lower die pressing shafts 8;

[0029] The highlight of this design is that: when the sheet metal workpiece is bent with the upper die, its two sides deflect with the deflection of the two lower die pressing shafts 8, so that the sheet metal workpiece does not slide relative to the shaft body 801 where the lower die pressing shaft 8 is located during the entire bending process, thereby avoiding the indentation and scratches on the surface of the sheet metal workpiece caused by the extrusion of the upper and lower dies, and significantly improving the bending quality of the sheet metal workpiece;

[0030] The utility model applies bending pressure to the sheet metal workpiece through the upper mold, so that the two sides of the sheet metal workpiece move with the movement of the two lower mold pressing shafts 8, so that the sheet metal workpiece does not slide relative to the shaft body 801 where the lower mold pressing shaft 8 is located during the entire bending process, thereby avoiding indentations and scratches on the surface of the sheet metal workpiece caused by the extrusion of the upper and lower molds, and significantly improving the bending quality of the sheet metal workpiece.

[0031] Furthermore, each lower die pressing shaft 8 is semicircular in shape as a whole.

[0032] like Figure 1 , 4As shown in Figure 5, the shape design of the lower die pressing shaft 8 is that when the two lower die pressing shafts 8 are not subjected to external force, the two lower die pressing shafts 8 are in a flush state to facilitate the placement of the sheet metal workpiece. When the two lower die pressing shafts 8 are subjected to external force, they can deflect as the sheet metal workpiece is bent.

[0033] Furthermore, the diameter of the mounting hole 803 is larger than the diameter of the second hook portion penetrating therein.

[0034] Combination Figure 2 , 7 As shown, the design provides a space for the expansion and contraction of the spring 7 and facilitates the installation of the spring 7.

[0035] Furthermore, the shaft body 801 where the two lower die pressing shafts 8 are located is also fixed with edge limiting parts on the opposite sides, and the edge limiting parts overlap with the top of the body 3, such as Figure 5 , 6 As shown, when the shaft body 801 where the two lower die pressing shafts 8 are located is in a planar state, the edge limiting portion overlaps with the machine body 3 to prevent the two lower die pressing shafts 8 from excessively deflecting downward.

[0036] Example 2

[0037] As another embodiment of the utility model, it also includes a mounting frame, which is composed of a base plate 1 and a plurality of mounting frames 2 arranged on the base plate 1, and the upper surface of the base plate 1 is used for the installation of the body 3; and a telescopic connecting member arranged at the top of each mounting frame 2, and also includes an upper mold block 13 detachably installed on the plurality of telescopic connecting members, and the bottom of the upper mold block 13 is used to press down the sheet metal workpiece and make the two lower mold pressing shafts 8 dock with the V-shaped groove 9 to form a lower mold V-groove.

[0038] Further, the upper mold block 13 is composed of a plate portion and a triangular portion;

[0039] Furthermore, the telescopic connecting member includes two hydraulic telescopic rods 10 installed on the top of the mounting frame 2, and a mounting plate 11 fixed to the telescopic ends of the two hydraulic telescopic rods 10, a threaded groove 14 opened in the middle of the mounting plate 11, in which a bolt 12 is arranged; and also includes a threaded hole opened in the plate portion where the upper mold block 13 is located.

[0040] Here, the upper mold block 13 can act on the upper surface of the sheet metal workpiece, and the upper mold block 13 can be detachably installed at the bottom of a plurality of telescopic connectors. Figure 4 , 5 , 6, and 7, the plate portion where the upper mold block 13 is located has a threaded hole, and the mounting plate 11 to which the telescopic ends of the hydraulic telescopic rods 10 are fixed has a threaded groove 14, which is combined with the bolt 12 to realize the installation process of the upper mold block 13, as shown in FIG. Figure 4As shown, when the hydraulic telescopic rod 10 is extended or retracted, the upper mold block 13 can be moved longitudinally, thereby further realizing the bending process of the sheet metal workpiece.

[0041] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "install", "connect", "connect", "fix" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection. There are many ways of detachable installation, for example, it can be through the method of plug-in and snap-fit, or through the method of bolt connection, etc.

[0042] The specific description of the present invention in the above embodiments is only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Technical engineers in this field may make some non-essential improvements and adjustments to the present invention based on the contents of the above-mentioned utility model, which fall within the scope of protection of the present invention.

Claims

1. A sheet metal bending forming die for reducing appearance indentation, characterized in that: include: A machine body (3), a V-shaped groove (9) provided at the top of the machine body (3), and two arc-shaped grooves (5) provided at the top of the machine body (3) and distributed on both sides of the V-shaped groove (9), a lower mold pressing shaft (8) slidably installed inside each of the arc-shaped grooves (5), which is composed of a shaft body (801), a mounting member (802) and a mounting hole (803) in the middle of the mounting member (802); It also includes a plurality of elastic reset components arranged inside the body (3), and each group of elastic reset components includes two slot structures, each slot structure includes a vertical slot (4) opened in the middle of the body (3), and a through slot (15) opened on the side wall of the body (3), and the through slot (15) and the vertical slot (4) are both connected to the arc slot (5); It also includes a mounting rod (6) arranged at the lower part of the body (3), a spring (7) arranged inside each of the vertical slots (4), a hook portion at the bottom end of which is hooked with the mounting rod (6), and a hook portion at the top end of which passes through the mounting hole (803) where the lower mold pressing shaft (8) is located and extends a certain distance.

2. A sheet metal bending forming die for reducing appearance indentation according to claim 1, characterized in that: Each of the lower die pressing shafts (8) is in a semicircular shape as a whole.

3. A sheet metal bending forming die for reducing appearance indentation according to claim 1, characterized in that: The diameter of the mounting hole (803) is larger than the diameter of the second hook portion penetrating the interior thereof.

4. The sheet metal bending forming die for reducing appearance indentation according to claim 1, characterized in that: The shaft body (801) where the two lower die pressing shafts (8) are located is also fixed with edge limiting parts on the opposite sides thereof, and the edge limiting parts overlap with the top of the machine body (3).

5. The sheet metal bending forming die for reducing appearance indentation according to claim 1, characterized in that: It also includes a mounting frame, the mounting frame consisting of a base plate (1) and a plurality of mounting frames (2) arranged on the base plate (1), and the upper surface of the base plate (1) is used for mounting the machine body (3); and a telescopic connection piece arranged at the top of each of the installation frames (2), and also includes an upper die pressing block (13) detachably mounted on the plurality of telescopic connection pieces, wherein the bottom of the upper die pressing block (13) is used to press down the sheet metal workpiece and make the two lower die pressing shafts (8) butt with the V-shaped groove (9) to form a lower die V-groove.

6. A sheet metal bending forming die for reducing appearance indentation according to claim 5, characterized in that: The upper mold block (13) is composed of a plate portion and a triangular portion.

7. The sheet metal bending forming die for reducing appearance indentation according to claim 5, characterized in that: The telescopic connection member comprises two hydraulic telescopic rods (10) mounted on the top of the mounting frame (2), and a mounting plate (11) fixed to the telescopic ends of the two hydraulic telescopic rods (10), a threaded groove (14) provided in the middle of the mounting plate (11) and a bolt (12) arranged therein; It also includes a threaded hole opened on the plate portion where the upper mold block (13) is located.

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