Plate cambered surface bending forming die

Abstract

The utility model discloses a plate cambered surface bending forming die, which belongs to the technical field of plate processing and comprises a base and an upper die, a mounting groove is arranged in the base, a lower die component is arranged in the mounting groove, resetting components are arranged on two sides of the lower die component, and the upper die is positioned at the top of the lower die. The lower die assembly and the upper die are pushed by the bending machine to downwards extrude a plate, so that the plate extrudes the protruding blocks, the two sides of the plate are extruded through synchronous and relative rotation of the extrusion rotating blocks, the two sides of the plate are excessively bent, after the upper die is reset, the plate rebounds the excessively-bent part under the stress effect, and bending is completed. And by arranging a reset assembly, during extrusion, a limiting rod rotates in a sliding mode along a limiting through hole and extrudes a reset spring, after the upper die is reset, an extrusion rotating block is pulled to rotate in the opposite direction under the elastic force action of the reset spring, and the reset function is achieved.

Description

Technical Field

[0001] This utility model relates to the field of sheet metal processing technology, and in particular to a sheet metal arc bending forming mold. Background Technology

[0002] A bending machine die is a tool used by a bending machine to shape and process sheet metal. After the sheet metal is placed into the bending die, the blank is shaped into a specific shape under the pressure of the bending machine. Bending processing includes "U" shaped bending.

[0003] Existing sheet metal curved bending forming molds cause the sheet metal to spring back when demolded due to stress after "U" shaped bending, affecting forming accuracy and requiring correction after demolding, thus impacting work efficiency. Utility Model Content

[0004] The purpose of this invention is to solve the problem that the sheet metal springs back and needs to be corrected after the sheet metal is bent in a "U" shape in the prior art, and to propose a sheet metal curved surface bending forming mold.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A sheet metal arc bending forming mold includes a base and an upper mold. The base has an installation groove, and multiple installation holes are provided on both sides of the outside of the base. Multiple limiting through holes are provided on both sides of the inside of the base facing the installation groove. A lower mold assembly is provided in the installation groove. Reset components are provided on both sides of the lower mold assembly. The upper mold is located on top of the lower mold.

[0007] Preferably, the size of the limiting through hole is smaller than that of the mounting hole, and the limiting through hole communicates with the mounting hole.

[0008] Preferably, the lower mold assembly includes an extrusion rotating block, which is placed opposite each other in the mounting groove. The extrusion rotating block has integrally formed protrusions on its opposite sides, and the top of the extrusion rotating block has a formed arc surface.

[0009] Preferably, a plurality of limiting rods are fixedly connected to one side of the extrusion block corresponding to the limiting through hole. The limiting rods are located in the mounting hole and the limiting through hole, and one end of the limiting rod is provided with a threaded layer.

[0010] Preferably, the reset assembly includes a fastening nut and a reset spring, one end of the fastening nut being threadedly connected to the limiting rod, and the reset spring being inserted into the limiting rod.

[0011] Preferably, the outer diameter of the return spring matches the mounting hole.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model, by setting a lower mold assembly, allows the upper mold to press the sheet metal downwards under the push of the bending machine during bending until the bottom of the sheet metal contacts the pressing rotating block. The upper mold continues to descend, causing the sheet metal to press the protrusion. Through the lever principle, the pressing rotating block rotates synchronously relative to the sheet metal, and the forming arc surface presses the two sides of the center of the sheet metal, causing the two sides of the sheet metal to be over-bent. When the bending machine drives the upper mold to reset, the sheet metal springs back the over-bent part under stress, completing the "U" shaped bend, avoiding subsequent correction and improving forming accuracy.

[0014] 2. This utility model, by setting a reset component, when the extrusion blocks rotate synchronously relative to each other, the limit rod slides and rotates along the limit through hole, and squeezes the reset spring through the fastening nut and one end of the mounting groove. When the upper mold is reset, the extrusion blocks are pulled by the elastic force of the reset spring, and the extrusion blocks rotate in the opposite direction through the lever principle, thus realizing the reset function. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a sheet metal arc bending forming mold proposed in this utility model;

[0016] Figure 2 This is a three-dimensional structural assembly diagram of a sheet metal arc bending forming mold proposed in this utility model;

[0017] Figure 3 This is a structural cross-sectional view of the base in a sheet metal arc bending forming mold proposed in this utility model;

[0018] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0019] Figure 5 This is a schematic diagram of the extrusion block and reset assembly in a sheet metal arc bending forming mold proposed in this utility model.

[0020] In the diagram: 1. Base; 2. Mounting groove; 3. Mounting hole; 4. Limiting through hole; 5. Upper mold; 6. Extrusion block; 601. Protrusion; 602. Forming arc surface; 7. Limiting rod; 8. Threaded layer; 9. Fastening nut; 10. Return spring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] Reference Figure 1-5 A sheet metal arc bending forming mold includes a base 1 and an upper mold 5. The base 1 has an installation groove 2 inside, and multiple installation holes 3 are provided on both sides of the outside of the base 1. Multiple limiting through holes 4 are provided on both sides of the inside of the base 1 facing the installation groove 2. A lower mold assembly is provided in the installation groove 2, and reset components are provided on both sides of the lower mold assembly. The upper mold 5 is located on top of the lower mold.

[0023] It should be noted that the upper mold 5 is existing technology, and its top end needs to be connected to the bending machine during use.

[0024] Furthermore, the size of the limiting through hole 4 is smaller than that of the mounting hole 3, and the limiting through hole 4 is in communication with the mounting hole 3, so that one end of the mounting hole 3 forms a shape like... Figure 4 The surface shown has a limiting function to support the compression of the return spring 10.

[0025] Furthermore, the lower mold assembly includes an extrusion rotating block 6, which is placed opposite each other in the mounting groove 2. The extrusion rotating block 6 has integrally formed protrusions 601 on its opposite sides. The top of the extrusion rotating block 6 has a forming arc surface 602 for forming the sheet material. A plurality of limiting rods 7 are fixedly connected to one side of the extrusion rotating block 6 corresponding to the limiting through hole 4. The limiting rods 7 are located in the mounting hole 3 and the limiting through hole 4. One end of the limiting rod 7 has a threaded layer 8 for connecting and fastening nuts 9.

[0026] A further advantage of the above is that the upper die 5 is pushed downward by the bending machine to press the sheet metal until the bottom of the sheet metal contacts the pressing block 6. The upper die 5 continues to descend, causing the sheet metal to press the protrusion 601. Through the lever principle, the pressing block 6 rotates synchronously relative to the sheet metal and presses the two sides of the sheet metal through the forming arc surface 602, causing the two sides of the sheet metal to be over-bent. When the bending machine drives the upper die 5 to reset, the sheet metal springs back the over-bent part under stress.

[0027] Furthermore, the reset assembly includes a fastening nut 9 and a reset spring 10. One end of the fastening nut 9 is threadedly connected to the limiting rod 7, and the reset spring 10 is inserted into the limiting rod 7. The outer diameter of the reset spring 10 matches the mounting hole 3.

[0028] A further advantage of the above is that when the extrusion block 6 rotates synchronously relative to the extrusion block 6, the limiting rod 7 slides and rotates along the limiting through hole 4, and squeezes the reset spring 10 through the fastening nut 9 and one end of the mounting groove 2. When the upper mold 5 is reset, the extrusion block 6 is pulled by the elastic force of the reset spring 10. The extrusion block 6 rotates in the opposite direction relative to the extrusion block 6 through the lever principle, thus realizing the reset function.

[0029] When this utility model is used, the plate is placed on the surface of the mounting base and bent. The upper mold 5 is pushed down by the bending machine to squeeze the plate until the bottom of the plate contacts the extrusion block 6. The upper mold 5 continues to descend, so that the plate squeezes the protrusion 601. Through the lever principle, the extrusion block 6 rotates synchronously relative to each other in the mounting groove 2 until the protrusion 601 merges together. At this time, the forming arc surface 602 squeezes the center and both sides of the plate, so that the two sides of the plate are over-bent to leave room for springback. At the same time, the limiting rod 7 is driven to rotate by the extrusion block 6, so that the limiting rod 7 slides along the limiting through hole 4, thereby reducing the distance from one end of the limiting rod 7 to the limiting through hole 4. This causes one side of the fastening nut 9 and one end of the mounting groove 2 to squeeze the return spring 10 together to accumulate energy.

[0030] After extrusion, when the bending machine drives the upper mold 5 to reset, the sheet metal rebounds under stress to the over-bent part, completing the "U" shaped bend. This avoids subsequent correction and improves forming accuracy. At this time, the extrusion rotating block 6 is pulled by the spring force of the reset spring 10, causing the extrusion rotating block 6 to rotate in the opposite direction in the mounting groove 2 and reset, thus realizing the automatic reset function.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A sheet metal arc bending forming mold, comprising a base (1) and an upper mold (5), characterized in that, The base (1) has an installation groove (2) inside, and multiple installation holes (3) are provided on both sides of the outside of the base (1). Multiple limiting through holes (4) are provided on both sides of the inside of the base (1) facing the installation groove (2). A lower mold assembly is provided in the installation groove (2). Reset assemblies are provided on both sides of the lower mold assembly. The upper mold (5) is located on top of the lower mold.

2. The sheet metal arc bending forming mold according to claim 1, characterized in that: The size of the limiting through hole (4) is smaller than that of the mounting hole (3), and the limiting through hole (4) is in communication with the mounting hole (3).

3. The sheet metal arc bending forming mold according to claim 1, characterized in that: The lower mold assembly includes an extrusion rotating block (6), which is placed opposite each other in the mounting groove (2). The extrusion rotating block (6) has integrally formed protrusions (601) on opposite sides, and a forming arc surface (602) is formed on the top of the extrusion rotating block (6).

4. The sheet metal arc bending forming mold according to claim 3, characterized in that: One side of the extrusion block (6) is fixedly connected to a plurality of limiting rods (7) corresponding to the limiting through hole (4). The limiting rods (7) are located in the mounting hole (3) and the limiting through hole (4). One end of the limiting rod (7) is provided with a threaded layer (8).

5. The sheet metal arc bending forming mold according to claim 1, characterized in that: The reset assembly includes a fastening nut (9) and a reset spring (10). One end of the fastening nut (9) is threadedly connected to the limiting rod (7), and the reset spring (10) is inserted into the limiting rod (7).

6. The sheet metal arc bending forming mold according to claim 5, characterized in that: The outer diameter of the return spring (10) matches the mounting hole (3).

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