A traceless bending device of a bending machine

Abstract

This utility model discloses a non-marking bending device for a bending machine, relating to the field of sheet metal processing technology, aiming to solve the problem of indentation easily generated by traditional bending processes. It includes an adaptive bending table and a bending cutter. The adaptive bending table includes a base with symmetrical arc-shaped grooves at its top. Arc-shaped protrusions are connected within the grooves, and the tops of the protrusions are connected to movable plates. The bending cutter head is located directly above the contact point between the two movable plates. The arc-shaped grooves and protrusions are concentric and compatible. The contact point between the movable plates has rounded corners. The base and both sides of the protrusions are connected to springs via pins, with the pins eccentrically connected to the protrusions. A positioning plate is mounted on the top of the movable plates to form a work station area. During bending, the cutting cutter presses down, driving the movable plate to deflect, achieving non-marking bending of sheet metal parts. Springs assist in resetting, and the positioning plate ensures accuracy, combining non-marking processing, precise positioning, and efficient operation.

Description

Technical Field

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

[0002] In the field of sheet metal processing, the bending of precision stainless steel parts, aluminum alloy parts, aircraft parts and copper plates has increasingly stringent requirements for the surface quality of workpieces. In the traditional bending process, the sheet material needs to go through the elastic deformation and plastic deformation stages, and then go through the pressure holding process of three-point contact between the die and the sheet material. The sheet material and the shoulder of the V-groove of the die are prone to extrusion friction, which eventually forms three obvious shoulder indentations, seriously affecting the aesthetics and market value of the product.

[0003] Indentation formation is affected by multiple factors: the larger the bending angle, the greater the tensile deformation of the sheet metal and the friction distance with the shoulder of the V-groove, the more significant the indentation; the smaller the width of the V-groove of the die and the smaller the shoulder R angle, the greater the pressure and friction coefficient on the sheet metal, and the deeper the indentation; die wear leads to rough V-groove surface and residual debris, which also exacerbates the formation of indentations.

[0004] Existing improvement solutions have limitations: V-grooves in non-metallic materials are easily worn out; ball bearing or flip-type molds have complex structures, high costs, and are difficult to maintain; and soft films have limited lifespans. How to effectively eliminate indentations while ensuring bending accuracy and economy has become a technical problem that the industry urgently needs to solve. Utility Model Content

[0005] To address the technical problems existing in the background art, this utility model proposes a non-marking bending device for bending machines.

[0006] This utility model proposes a seamless bending device for a bending machine, comprising an adaptive bending table and a bending cutter. The adaptive bending table includes a base, the top of which is symmetrically provided with arc-shaped grooves. Each arc-shaped groove is rotatably connected to an arc-shaped protrusion, and the top of each arc-shaped protrusion is integrally connected to a movable plate. The cutting head of the bending cutter is located directly above the contact point of the two movable plates, so that when the bending cutter presses down, the two movable plates deflect relative to each other around their respective arc-shaped protrusions.

[0007] Furthermore, the arc-shaped groove and the arc-shaped protrusion are adapted to each other and are semi-circular structures with the same center.

[0008] Furthermore, rounded corners are provided at the joint of the two movable plates to prevent interference when the two movable plates rotate relative to each other.

[0009] Furthermore, pins are threaded to both sides of the base and both sides of the arc-shaped protrusion, and a spring is connected between two pins located on the same vertical line.

[0010] Furthermore, the pin is eccentrically connected to the arc-shaped protrusion to drive the movable plate and the arc-shaped protrusion to reset as a whole.

[0011] Furthermore, positioning plates are symmetrically installed on the top of each of the movable plates, and a work station area is reserved between the positioning plates to position and constrain the sheet metal parts.

[0012] Furthermore, on both sides of the platform, at positions corresponding to the arc-shaped groove, stop blocks are installed by bolts to limit the lateral position of the arc-shaped protrusion.

[0013] The beneficial effects of this utility model are as follows: By using the co-centered design of the arc groove and arc protrusion of the adaptive bending table, the rounded corner structure at the contact point of the movable plate, and the spring reset mechanism with the eccentric connection of the pin, it ensures that the sheet metal parts are subjected to uniform force and have no local friction interference during bending, avoiding the indentation problem caused by the shoulder extrusion of the traditional concave die V-groove. At the same time, the positioning plate can accurately constrain the position of the workpiece to ensure bending accuracy. Meanwhile, the spring-driven automatic reset function improves the work efficiency. The overall structure takes into account the seamless processing, precise positioning and efficient operation, and does not require frequent replacement of non-metallic parts or maintenance of complex ball / flip molds. While ensuring the surface quality and processing accuracy of the product, it reduces the equipment maintenance cost and operation difficulty, and meets the high quality and economic requirements of precision sheet metal parts processing. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the disassembled structure of this utility model; Figure 2 This is a schematic diagram of the disassembled structure of the adaptive bending table in this utility model; Figure 3 This is a schematic diagram of the assembly structure of the adaptive bending table in this utility model; Figure 4 This is a schematic diagram of the structure of this utility model after assembly and bending.

[0015] In the diagram: 1. Adaptive bending table; 11. Base; 111. Stop block; 12. Arc groove; 13. Movable plate; 14. Arc protrusion; 15. Spring; 16. Pin; 17. Positioning plate; 18. Workstation area; 2. Bending tool; 3. Sheet metal part. Detailed Implementation

[0016] Reference Figure 1-4 This utility model proposes a seamless bending device for a bending machine, comprising an adaptive bending table 1 and a bending cutter 2. The two work together to achieve seamless bending of sheet metal parts 3. The adaptive bending table 1 serves as the support and deformation base for the sheet metal parts 3, providing a stable working platform for the bending process. The bending cutter 2 acts as the actuating component, driving the sheet metal parts 3 to complete a predetermined angle bend on the adaptive bending table through a downward pressing action. The specific technical solution is as follows: The adaptive bending table 1 consists of a base 11, a movable plate 13, an arc-shaped protrusion 14, a spring 15, a pin 16, and a positioning plate 17. The top of the base 11 is symmetrically provided with arc-shaped grooves 12. The size of the arc-shaped grooves 12 is adapted to the arc-shaped protrusions 14, and the two are semi-circular structures with the same center. This design allows the arc-shaped protrusions 14 to rotate stably inside the arc-shaped grooves 12, while ensuring that the center position is fixed during rotation, providing a precise motion trajectory for the deflection of the movable plate 13. The top of each arc-shaped protrusion 14 is integrally connected to the movable plate 13. The contact area between the two movable plates 13 is provided with rounded corners. This rounded corner structure can effectively avoid edge interference when the two movable plates 13 rotate relative to each other, ensuring the smooth movement of the movable plate 13 during bending and preventing indentations or damage to the surface of the sheet metal part 3 due to structural jamming. To achieve automatic reset of the movable plate 13 after bending, pins 16 are threadedly connected to both sides of the base 11 and both sides of the arc-shaped protrusion 14. A spring 15 is connected between the two pins 16 located on the same vertical line. In particular, the pins 16 and the arc-shaped protrusion 14 are eccentrically connected. When the bending cutter 2 presses down to drive the two movable plates 13 to deflect relative to each other with the arc-shaped protrusion 14 as the center, the arc-shaped protrusion 14 will drive the pins 16 connected to it to move synchronously, so that the spring 15 is stretched. When the bending cutter 2 is lifted, the spring 15 contracts, and the arc-shaped protrusion 14 is pulled through the eccentrically connected pins 16, thereby driving the movable plate 13 to return to the initial fitting state, preparing for the next bending operation. Positioning plates 17 are symmetrically installed on the top of the movable plate 13. A work station area 18 is reserved between the positioning plates 17. The size of the work station area 18 can be adapted and adjusted according to the specifications of the sheet metal part 3 to be processed. Before the bending operation begins, the sheet metal part 3 is placed in the work station area 18. The positioning plates 17 can position and constrain the sheet metal part 3 from both sides to prevent the sheet metal part 3 from lateral displacement or deviation during the bending process, ensuring accurate bending position and avoiding bending size deviation or surface scratches due to inaccurate positioning. In addition, on both sides of the base 11, and at the position corresponding to the arc groove 12, stop blocks 111 are installed by bolts. The inner side of the stop block 111 abuts against the two ends of the arc protrusion 14 to limit the lateral position of the arc protrusion 14. The bending cutter 2 is precisely aligned above the contact area of ​​the two movable plates 13. When the device is started to perform the bending operation, the bending cutter 2 moves downward in the vertical direction. Its cutting head first contacts the sheet metal part 3 placed in the work station area 18 and applies pressure. As the bending cutter 2 continues to press down, the sheet metal part 3, under the action of pressure, drives the two movable plates 13 to deflect relative to each other around their respective arc-shaped protrusions 14. Due to the co-center design of the arc grooves 14 and the arc protrusions 12, the deflection trajectory of the movable plates 13 remains stable, so that the bending part of the sheet metal part 3 is evenly stressed, avoiding excessive local pressure and indentation. During the entire bending process, the positioning plate 17 continuously positions the sheet metal part 3 to ensure that the bending angle and position meet the processing requirements. When the sheet metal part 3 is bent to the predetermined angle, the bending cutter 2 returns to the upward reset, and the spring 15 drives the movable plate 13 to return to the initial state. At this time, the finished, indentation-free sheet metal part 3 can be taken out, completing one bending operation.

[0017] 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 seamless bending device for a bending machine, characterized in that, The device includes an adaptive bending table (1) and a bending cutter (2). The adaptive bending table (1) includes a base (11). The top of the base (11) is symmetrically provided with arc-shaped grooves (12). Each arc-shaped groove (12) is rotatably connected to an arc-shaped protrusion (14). The top of each arc-shaped protrusion (14) is integrally connected to a movable plate (13). The cutting head of the bending cutter (2) is located directly above the contact point of the two movable plates (13) so that when the bending cutter (2) is pressed down, the two movable plates (13) can be relatively deflected around their respective arc-shaped protrusions (14). Positioning plates (17) are symmetrically installed on the top of each of the movable plates (13), and workstation areas (18) are reserved between the positioning plates (17) to position and constrain the sheet metal parts (3).

2. The seamless bending device for a bending machine according to claim 1, characterized in that, The arc-shaped groove (12) and the arc-shaped protrusion (14) are adapted to each other and are semi-circular structures with the same center.

3. The seamless bending device for a bending machine according to claim 1, characterized in that, The joint of the two movable plates (13) is rounded to prevent interference when the two movable plates (13) rotate relative to each other.

4. The seamless bending device for a bending machine according to claim 1, characterized in that, Pins (16) are threaded to both sides of the base (11) and both sides of the arc-shaped protrusion (14). The spring (15) is connected between two pins (16) located on the same vertical line.

5. The seamless bending device for a bending machine according to claim 4, characterized in that, The pin (16) is eccentrically connected to the arc-shaped protrusion (14) to drive the movable plate (13) and the arc-shaped protrusion (14) to reset as a whole.

6. The seamless bending device for a bending machine according to claim 1, characterized in that, On both sides of the pedestal (11) and at positions corresponding to the arc groove (12), stop blocks (111) are installed by bolts to restrict the lateral position of the arc protrusion (14).

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