Sheet metal part stamping and bending device

Abstract

The utility model discloses a stamping and bending device for sheet metal parts, which relates to the technical field of sheet metal part processing, and comprises a bending box, a lower die, a positioning base plate and an upper die, two heating components are arranged at the bottom end of the upper die, each heating component comprises a joint shaft sleeve, a conical gear ring and an infrared heating strip, at least two resistance wires are installed in each infrared heating strip, a butt joint rotating rod in butt joint with the infrared heating strips is rotationally installed at the bottom end of the upper die, the tail end of a joint shaft sleeve is rotationally connected with the upper die, the infrared heating strips are driven to swing at the bottom end of the upper die, the irradiation range is enlarged, and the infrared heating strips are driven to swing at the bottom end of the upper die by rotating a fixing screw. The tail end of the fixing screw rod rotates on the side end portion of the upper die, the rotating fixing screw rod generates thrust on the sliding extension plate, the sliding extension plate drives the pressure equalizing plate to slide on the side end portion of the upper die, the stress area of the bottom end of the upper die is increased, and stamping and bending can be conducted on sheet metal parts of different sizes.

Description

Technical Field

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

[0002] Sheet metal processing is a comprehensive cold working process for thin metal sheets, including shearing, punching / cutting / combined cutting, bending, welding, riveting, splicing, and forming. Its most significant characteristic is that the thickness of the same part is consistent. Products processed through sheet metal processing are called sheet metal parts. The term "sheet metal part" generally varies across different industries and is often used in assembly. In practical applications, stamping and bending equipment typically requires the following technologies:

[0003] 1. Mold components, used for stamping and bending sheet metal parts;

[0004] 2. Positioning and clamping components, used to determine the position of sheet metal parts in the device;

[0005] 3. Power components, which provide power to the device;

[0006] Currently, existing stamping and bending devices (such as patent publication number: CN219025493U) disclose a sheet metal stamping and bending processing device. The bending angle of the sheet metal part can be adjusted by the adjustment device, reducing the restrictions on the use of the sheet metal part and effectively improving the work efficiency when bending the sheet metal part. The bending mechanism can be used to bend the sheet metal part, which facilitates the subsequent use of the sheet metal part and helps to improve the practicality of the sheet metal part.

[0007] The greater the deformation of the material at the bend, the greater the internal stress. When the material is subjected to a large impact force in a short period of time, it will generate more elastic deformation energy. After the stamping is completed, this elastic deformation energy will cause the material to spring back, resulting in the sheet metal part failing to achieve the expected shape and dimensional accuracy. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this utility model provides a sheet metal stamping and bending device, which solves the technical problem that the greater the deformation of the material at the bending point, the greater the internal stress, and the greater the impact force on the material in a short period of time, the more elastic deformation energy is generated. After stamping, this elastic deformation energy causes the material to spring back, resulting in the sheet metal part failing to achieve the expected shape and dimensional accuracy.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A sheet metal stamping and bending device includes a bending box, a lower die, a positioning pad, and an upper die. The bottom end of the upper die is provided with two heating components. Each heating component includes a joint bushing, a conical toothed ring, and an infrared heating strip. Each infrared heating strip has at least two resistance wires installed inside. The bottom end of the upper die is rotatably mounted with a docking rod that docks with the infrared heating strip.

[0011] Preferably, each of the upper molds has two hydraulic rods fixedly installed at its top end, which are connected to the bending box; each of the upper molds has two multi-segment telescopic protective sleeves fixedly installed at its top end; and each of the protective sleeves has a bent transmission line fixedly installed inside.

[0012] The top of each of the said docking rotors is tapered, and the end of each of the said docking rotors is connected to the output shaft of the motor via a transmission rod.

[0013] Preferably, an adjustment assembly is slidably mounted on both sides of the upper mold, and each adjustment assembly includes a fixing screw, a sliding extension plate, and a pressure equalizing plate;

[0014] One end of the transmission line is connected to the infrared heating strip, and the transmission line transmits current internally.

[0015] Each of the upper molds has a mating groove on its side end and a positioning hole on its side end, which is rotatably connected to the end of the fixing screw.

[0016] Compared with the prior art, the present invention has the following beneficial effects;

[0017] In this invention, the resistance wire heats up when an electric current is applied, generating infrared rays. The infrared heating strip heats up and radiates infrared rays after being energized. By moving the upper mold, the infrared heating strip is brought closer to the surface of the sheet metal part, preheating the bending area of ​​the sheet metal part. This releases the internal stress of the material, significantly reducing the springback, better ensuring the bending angle and dimensional accuracy, and improving the forming quality of the sheet metal part. The stamping bending force required for the sheet metal part is reduced after preheating, thus reducing the load on the stamping equipment during operation.

[0018] In this invention, by rotating the fixing screw, the end of the fixing screw rotates at the side end of the upper mold. The surface of the fixing screw is threaded. The rotating fixing screw generates a thrust on the sliding extension plate, which in turn drives the pressure equalizing plate to slide at the side end of the upper mold, increasing the force-bearing area at the bottom of the upper mold. This allows for stamping and bending of sheet metal parts of different sizes. Attached Figure Description

[0019] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0020] Figure 1 This is a structural diagram of the bending box of this utility model.

[0021] Figure 2 This is a structural diagram of the upper mold of this utility model.

[0022] Figure 3 This is a structural diagram of the sliding extension plate of this utility model.

[0023] Figure 4 This utility model Figure 2 Enlarged structural diagram at point A.

[0024] In the diagram: 11. Bending box; 12. Lower mold; 13. Positioning pad; 14. Upper mold; 15. Joint bushing; 16. Conical toothed ring; 17. Infrared heating strip; 18. Docking rod; 19. Fixing screw; 21. Sliding extension plate; 22. Pressure equalizing plate; 23. Protective sleeve; 24. Transmission line; 25. Hydraulic rod. Detailed Implementation

[0025] This application provides a sheet metal stamping and bending device that effectively solves the problem that the greater the deformation of the material at the bending point, the greater the internal stress. When the material is subjected to a large impact force in a short period of time, it will generate more elastic deformation energy. After stamping, this elastic deformation energy will cause the material to spring back, resulting in the sheet metal part failing to achieve the expected shape and dimensional accuracy. When current is applied, the resistance wire heats up and generates infrared rays. The infrared heating strip heats up and radiates infrared rays after being energized. By moving the upper mold, the infrared heating strip is brought closer to the surface of the sheet metal part, preheating the bending point of the sheet metal part. The internal stress of the material is released, and the springback is significantly reduced. This better ensures the bending angle and dimensional accuracy, improves the forming quality of the sheet metal part, and reduces the stamping bending force required after preheating, thus reducing the load on the stamping equipment during operation. Example

[0026] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the technical solution in this application effectively solves the problem that the greater the deformation of the material at the bend, the greater the internal stress; the greater the impact force on the material in a short time, the more elastic deformation energy is generated; and after stamping, this elastic deformation energy causes the material to spring back, resulting in the sheet metal part failing to achieve the expected shape and dimensional accuracy. The overall idea is as follows:

[0027] To address the problems existing in the prior art, this utility model provides a sheet metal stamping and bending device, including a bending box 11, a lower die 12, a positioning pad 13, and an upper die 14. Two heating components are provided at the bottom of the upper die 14. Each heating component includes a joint bushing 15, a conical toothed ring 16, and an infrared heating strip 17. At least two resistance wires are installed inside each infrared heating strip 17. A docking rod 18, which rotatably connects to the infrared heating strip 17, is rotatably mounted at the bottom of the upper die 14. Current causes the resistance wires to heat up and generate infrared radiation. The infrared heating strip 17, after being energized, heats up and radiates infrared radiation. By moving the upper die 14, the infrared heating strip 17 is brought closer to the surface of the sheet metal part, preheating the bending area of ​​the sheet metal part. This releases the internal stress of the material, significantly reducing springback and better ensuring bending angle and dimensional accuracy, thus improving the forming quality of the sheet metal part. The stamping and bending force required after preheating is reduced, thus reducing the load on the stamping equipment during operation.

[0028] The top of each docking rod 18 is tapered, and the end of each docking rod 18 is connected to the output shaft of the motor through a transmission rod. The docking rod 18 is driven to deflect in both directions. The top of the docking rod 18 is connected to the conical toothed ring 16, which is driven to deflect. At the same time, the end of the joint bushing 15 is rotatably connected to the upper mold 14, which causes the infrared heating strip 17 to swing at the bottom of the upper mold 14, increasing the irradiation range.

[0029] Two hydraulic rods 25 connected to the bending box 11 are fixedly installed at the top of each upper mold 14. Two multi-segment telescopic protective sleeves 23 are fixedly installed at the top of each upper mold 14. A bent transmission line 24 is fixedly installed inside each protective sleeve 23. By driving the two hydraulic rods 25 to extend and retract synchronously, the hydraulic rods 25 push the upper mold 14 to slide vertically downward inside the bending box 11. The bottom end of the upper mold 14 is connected to the lower mold 12. The sheet metal is stamped and bent by the downward extrusion of the upper mold 14. One end of the transmission line 24 is connected to the infrared heating strip 17 to transmit current into the infrared heating strip 17.

[0030] Adjustment components are slidably installed on both sides of the upper mold 14. Each adjustment component includes a fixing screw 19, a sliding extension plate 21, and a pressure equalizing plate 22. By rotating the fixing screw 19, the end of the fixing screw 19 rotates at the side end of the upper mold 14. The surface of the fixing screw 19 is threaded. The rotating fixing screw 19 generates a thrust on the sliding extension plate 21, causing the sliding extension plate 21 to drive the pressure equalizing plate 22 to slide at the side end of the upper mold 14, increasing the force-bearing area at the bottom of the upper mold 14, which can stamp and bend sheet metal parts of different sizes.

[0031] Each upper mold 14 has a mating groove on its side end and a positioning hole on its side end, which is rotatably connected to the end of the fixing screw 19.

[0032] Working principle:

[0033] The first step involves moving the sheet metal part and placing it on top of the lower mold 12. By driving the screws on both sides of the lower mold 12 to rotate, the two positioning pads 13 are pulled to move to the side end of the lower mold 12. The two positioning pads 13 press and fix the sheet metal part to prevent displacement. By driving the two hydraulic rods 25 to extend and retract synchronously, the hydraulic rods 25 push the upper mold 14 to slide vertically downward inside the bending box 11. The bottom end of the upper mold 14 is aligned with the lower mold 12. The sheet metal part is stamped and bent by the downward pressing of the upper mold 14.

[0034] The second step involves heating the resistance wire to generate infrared radiation when current is applied. The infrared heating strip 17, after being energized, radiates infrared radiation. By moving the upper mold 14, the infrared heating strip 17 is brought closer to the surface of the sheet metal part, preheating the bent area. This releases internal material stress, significantly reducing springback and better ensuring bending angle and dimensional accuracy, thus improving the forming quality of the sheet metal part. The reduced stamping and bending force after preheating lowers the load on the stamping equipment. The driving mechanism rotates the docking rod 18 in both directions. The top of the docking rod 18 is connected to the conical toothed ring 16, driving the conical toothed ring 16 to deflect. Simultaneously, the end of the joint bushing 15 is rotatably connected to the upper mold 14, causing the infrared heating strip 17 to swing at the bottom of the upper mold 14, increasing the irradiation range.

[0035] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A sheet metal stamping and bending device, comprising a bending box (11), a lower die (12), a positioning pad (13), and an upper die (14), characterized in that, The bottom end of the upper mold (14) is provided with two heating components. Each heating component includes a joint bushing (15), a conical toothed ring (16), and an infrared heating strip (17). Each infrared heating strip (17) has at least two resistance wires installed inside. The bottom end of the upper mold (14) is rotatably mounted with a docking rod (18) that docks with the infrared heating strip (17).

2. The sheet metal stamping and bending device as described in claim 1, characterized in that, Two hydraulic rods (25) connected to the bending box (11) are fixedly installed at the top of each upper mold (14), and two multi-segment telescopic protective sleeves (23) are fixedly installed at the top of each upper mold (14), and a bent transmission line (24) is fixedly installed inside each protective sleeve (23).

3. The sheet metal stamping and bending device as described in claim 1, characterized in that, The top of each of the said docking rotors (18) is tapered, and the end of each of the said docking rotors (18) is connected to the output shaft of the motor via a transmission rod.

4. The sheet metal stamping and bending device as described in claim 1, characterized in that, The upper mold (14) is slidably mounted with adjustment components on both sides. Each adjustment component includes a fixing screw (19), a sliding extension plate (21), and a pressure equalizing plate (22).

5. A sheet metal stamping and bending device as described in claim 2, characterized in that, One end of the transmission line (24) is connected to the infrared heating strip (17), and the transmission line (24) transmits current internally.

6. The sheet metal stamping and bending device as described in claim 1, characterized in that, Each of the upper molds (14) has a mating groove on its side end and a positioning hole on its side end, which is rotatably connected to the end of the fixing screw (19).

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