Metal piece bending forming device

Abstract

The application relates to the technical field of metal piece bending devices, in particular to a metal piece bending forming device. The technical scheme comprises a machine body, multiple groups of pressure type components, a transmission mechanism, a pressure conversion structure and a pressure control component. The pressure type component comprises a base plate fixed to the machine body, a rotating plate rotatably installed on the base plate through a rotating connecting piece, a pressure head slidably installed on the rotating plate and a push rod motor fixedly installed. The transmission mechanism changes the volumes of a first liquid cavity and a second liquid cavity by rotating the rotating plate, the pressure conversion structure comprises liquid storage barrels in communication with the two liquid cavities, and the pressure control component keeps the pressure difference inside the two liquid storage barrels constant. The push rod motor and the pressure head are installed on the same plate, the feeding direction is consistent with the direction of the pressure head, transverse sliding friction is eliminated, constant force reset is realized through hydraulic transmission and constant pressure difference, and the problem that the spring reset resistance increases with the angle is avoided.

Description

Technical Field

[0001] This invention relates to the field of metal bending device technology, and more particularly to a metal bending forming device. Background Technology

[0002] In the bending and forming process of metal sheets, horizontal bending devices are commonly used. This involves placing the workpiece horizontally, with the forming structures on both sides moving relative to each other in the horizontal direction, applying pressure to both ends of the workpiece to achieve bending. In horizontal metal sheet bending and forming devices, the pressure head is often designed to be rotatable to accommodate workpieces of different sizes and bending angles. However, in existing designs, the push rod motor is usually fixed to the frame, and its driving direction remains constant. When the pressure head deflects at a certain angle, the feed direction of the push rod motor is no longer consistent with the pointing direction of the pressure head, causing a lateral displacement component in the pressure head during bending. This increases the sliding friction between the pressure head and the workpiece surface, potentially causing scratches on the workpiece surface. Furthermore, if a spring is used to reset the pressure head in this structure, the spring's reset force increases with the increase of the pressure head's rotation angle, affecting the reset accuracy.

[0003] To address the aforementioned issues, this application proposes a structure in which the push rod motor and the pressure head are jointly mounted on the rotating plate, ensuring that the feed direction always coincides with the direction in which the pressure head points, thus eliminating lateral sliding friction. Simultaneously, a hydraulic constant pressure differential structure is used to replace the spring reset, providing a stable reset force that does not change with the rotation angle. Summary of the Invention

[0004] The purpose of this application is to address the problems existing in the background art by proposing a metal part bending and forming device that can achieve flexible adjustment of bending angle and consistency of feed direction while eliminating the adverse effects of the return spring.

[0005] The technical solution of this application: A metal part bending and forming device, comprising a body, and further comprising: Multiple sets of forming components are installed on the machine body. The forming components include a base plate fixedly installed on the machine body, a rotating plate rotatably installed on the base plate through a rotating connector, and a pressure head is slidably installed on the rotating plate and a push rod motor for driving the pressure head to move is fixedly installed on the rotating plate. The transmission mechanism and pressure conversion structure are mounted on the substrate. The transmission mechanism includes a first liquid chamber and a second liquid chamber. The pressure conversion structure includes two liquid storage cylinders that are respectively connected to the first liquid chamber and the second liquid chamber. The first liquid chamber, the second liquid chamber, and the liquid storage cylinders are all filled with a transmission medium. The transmission mechanism changes the volume of the first liquid chamber and the second liquid chamber as the rotating plate rotates. A pressure control component controls the pressure difference between the two liquid storage tanks to remain constant.

[0006] Optionally, a guide rail is fixedly mounted on the rotating plate, multiple sliders are slidably mounted on the guide rail, an mounting plate is fixedly mounted on the multiple sliders, the pressure head is fixedly connected to the mounting plate, and the output shaft of the push rod motor is fixedly connected to the mounting plate.

[0007] Optionally, the rotating connector includes a connecting pin snapped onto the rotating plate, a limiting plate inserted into the connecting pin, a rotating ring rotatably mounted on the limiting plate, and a locking buckle fixedly mounted on the connecting pin to press the rotating ring together.

[0008] Optionally, a plurality of balls are rotatably mounted on the rotating ring, and the limiting plate is provided with a groove for accommodating the balls.

[0009] Optionally, the top of the connecting pin is provided with a polygonal top plate, and the rotating plate is provided with a groove to accommodate the top plate.

[0010] Optionally, the transmission mechanism includes a liquid tank fixedly mounted on the base plate and a drive head fixedly mounted on the rotating connector that rotates with the rotating plate. The drive head is rotatably connected to the liquid tank and sealed by a sealing ring. A first sealing head is fixedly mounted on the drive head, and a second sealing head is fixedly mounted on the liquid tank. The first and second sealing heads form a seal at their contact points with the liquid tank and the drive head. The first and second liquid cavities are formed by the first and second sealing heads dividing the internal space of the liquid tank.

[0011] Optionally, the pressure conversion structure further includes a sealing plate that is slidably and sealingly installed inside the liquid storage cylinder, and a pressure groove is formed between the sealing plate and the top of the liquid storage cylinder. The two pressure grooves are respectively connected to the first liquid chamber and the second liquid chamber through connecting pipes.

[0012] Optionally, the transmission medium is located inside the first liquid chamber, the second liquid chamber, the connecting pipe, and the pressure tank. The transmission medium is a liquid that cannot be compressed under working conditions, and a solenoid valve is fixedly installed on one of the connecting pipes.

[0013] Optionally, the pressure control component includes a pressure chamber located between the sealing plate and the bottom of the liquid storage cylinder, an air pipe connected to the pressure chamber, and an air pump system for controlling the air pressure inside the pressure chamber connected to the other end of the air pipe. A pressure sensor is connected inside the pressure chamber.

[0014] Optionally, the pressure control component includes a connecting rod fixedly mounted on the sealing plate, one of the connecting rods having a first counterweight fixedly mounted on it, and the other connecting rod having a second counterweight mounted on it, with a gravity difference between the first counterweight and the second counterweight.

[0015] In summary, this application includes at least one of the following beneficial technical effects: This application mounts the push rod motor and the pressure head together on a rotatable plate, ensuring that the feed direction of the push rod motor is always consistent with the pointing direction of the pressure head. This completely eliminates the lateral sliding friction caused by inconsistent directions in traditional structures, effectively avoids scratches on the workpiece surface and wear on the mold, and significantly improves bending accuracy and product surface quality. The rotating plate drives the transmission mechanism to change the volume of the first liquid chamber and the second liquid chamber. A constant pressure difference is applied to the transmission medium in the two liquid storage tanks through the pressure control component, which provides a constant reset torque for the rotating plate that does not change with the rotation angle. This overcomes the defects of the prior art that use spring reset, such as increased resistance with angle, difficulty in control, and increased energy consumption. The structural scheme that uses a counterweight to generate a gravity difference as a constant pressure source eliminates the need for a gas source and a complex control system, and has the advantages of low cost and high reliability. Attached Figure Description

[0016] Figure 1 A schematic diagram of a metal bending and forming device; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 Schematic diagram of the pressed component Figure 1 ; Figure 4 Schematic diagram of the pressed component Figure 2 ; Figure 5 This is a schematic diagram of the rotating connector. Figure 6 for Figure 5 A magnified view of a section at point B in the middle; Figure 7 This is a structural diagram of the connecting pin; Figure 8 This is a schematic diagram showing the connection between the latch and the transmission mechanism; Figure 9 Schematic diagram of the transmission mechanism Figure 1 ; Figure 10 Schematic diagram of the transmission mechanism Figure 2 ; Figure 11 Schematic diagram of the pressure conversion structure and pressure control components Figure 1 ; Figure 12 Schematic diagram of the pressure conversion structure and pressure control components Figure 2 .

[0017] Reference numerals: 1. Machine body; 2. Forming component; 21. Base plate; 22. Rotating plate; 23. Push rod motor; 24. Guide rail; 25. Slider; 26. Mounting plate; 27. Press head; 3. Rotating connector; 31. Connecting pin; 32. Limiting plate; 33. Rotating ring; 34. Ball bearing; 35. Lock; 4. Transmission mechanism; 41. Liquid tank; 42. Drive head; 43. Sealing ring; 44. First sealing head; 45. Second sealing head; 46. First liquid chamber; 47. Second liquid chamber; 5. Pressure conversion structure; 51. Liquid storage cylinder; 52. Sealing plate; 53. Pressure groove; 54. Connecting pipe; 55. Solenoid valve; 6. Pressure control component; 611. Pressurizing chamber; 612. Air pipe; 613. Air pressure sensor; 621. Connecting rod; 622. First counterweight; 623. Second counterweight. Detailed Implementation

[0018] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] Example 1; as Figures 1 to 4 As shown, the metal bending and forming device proposed in this application includes a machine body 1 and multiple sets of forming components 2 mounted on the machine body 1. The forming components 2 include a base plate 21 fixedly mounted on the machine body 1 and a rotating plate 22 rotatably mounted on the base plate 21 via a rotating connector 3. A pressure head 27 is slidably mounted on the rotating plate 22 and a push rod motor 23 for driving the pressure head 27 to move is fixedly mounted on it. By mounting the push rod motor 23 and the pressure head 27 together on the rotating plate 22, when the rotating plate 22 rotates around the rotating connector 3 to the required bending angle, the push rod motor 23 drives the pressure head 27 to move linearly in the direction of the rotating plate 22. This ensures that the feed amount of the push rod motor 23 is equal to the actual feed amount of the pressure head 27 and avoids lateral sliding friction caused by inconsistent directions. At the same time, the rotatable setting of the rotating plate 22 allows the pressure head 27 to adaptively adjust its posture according to the actual position of the workpiece end and the bending angle requirements.

[0020] Furthermore, a guide rail 24 is fixedly installed on the rotating plate 22, and multiple sliders 25 are slidably installed on the guide rail 24. An mounting plate 26 is fixedly installed on the multiple sliders 25. The pressure head 27 is fixedly connected to the mounting plate 26. The output shaft of the push rod motor 23 is fixedly connected to the mounting plate 26. The guide rail 24 and the sliders 25 ensure that the pressure head 27 moves smoothly along the set direction under the drive of the push rod motor 23. The mounting plate 26 evenly transmits the output force of the push rod motor 23 to the pressure head 27.

[0021] like Figures 5 to 8As shown, in this embodiment, the rotating connector 3 includes a connecting pin 31 snapped onto the rotating plate 22, a limiting plate 32 inserted into the connecting pin 31, a rotating ring 33 rotatably mounted on the limiting plate 32, and a latch 35 fixedly mounted on the connecting pin 31 to press the rotating ring 33. The latch 35 presses the rotating ring 33 to keep the axial distance between the rotating ring 33 and the top of the connecting pin 31 constant, thereby reliably connecting the rotating plate 22 and the base plate 21 into one unit, ensuring the structural stability of the rotating pair. The rotating ring 33 effectively reduces the frictional resistance during rotation when the rotating plate 22 drives the connecting pin 31 to rotate.

[0022] Furthermore, multiple balls 34 are rotatably mounted on the rotating ring 33, and the limiting plate 32 is provided with grooves to accommodate the balls 34. The balls 34 are embedded in the grooves of the limiting plate 32 and can roll freely within the rotating ring 33, so that a rolling friction pair is formed between the rotating ring 33 and the limiting plate 32, which can effectively reduce the frictional torque when the rotating plate 22 rotates. The top of the connecting pin 31 is provided with a polygonal top plate, and the rotating plate 22 is provided with a groove to accommodate the top plate. The polygonal top plate and the polygonal groove on the rotating plate 22 cooperate with each other to form a circumferential positioning structure, ensuring that the connecting pin 31 and the rotating plate 22 cannot rotate relative to each other, so that the rotation of the rotating plate 22 can be accurately transmitted to the connecting pin 31.

[0023] like Figures 8 to 11 As shown, this embodiment also includes a transmission mechanism 4 and a pressure conversion structure 5 mounted on the substrate 21. The transmission mechanism 4 includes a first liquid chamber 46 and a second liquid chamber 47. The pressure conversion structure 5 includes two storage cylinders 51 that are respectively connected to the first liquid chamber 46 and the second liquid chamber 47. The first liquid chamber 46, the second liquid chamber 47, and the storage cylinders 51 are all filled with a transmission medium. The transmission mechanism 4 changes the volume of the first liquid chamber 46 and the second liquid chamber 47 as the rotating plate 22 rotates. When the rotating plate 22 rotates, the transmission mechanism 4 converts the rotation angle into a change in the volume of the first liquid chamber 46 and the second liquid chamber 47. Since the transmission medium is incompressible, the change in volume will force the transmission medium to flow between the liquid chamber and the storage cylinder 51. By controlling the resistance when the transmission medium flows, an adjustable damping effect can be provided for the rotation of the rotating plate 22. At the same time, by controlling the pressure difference inside the two storage cylinders 51, a unidirectional reset torque can be applied to the rotating plate 22 to realize the automatic reset function.

[0024] Furthermore, the transmission mechanism 4 includes a liquid tank 41 fixedly mounted on the base plate 21 and a drive head 42 fixedly mounted on the rotating connector 3 that rotates with the rotating plate 22. Specifically, the drive head 42 is fixedly connected to the latch 35, rotatably connected to the liquid tank 41 and sealed by a sealing ring 43, a first sealing head 44 is fixedly mounted on the drive head 42, and a second sealing head 45 is fixedly mounted on the liquid tank 41. The first sealing head 44 and the second sealing head 45 are connected to the liquid tank 41 and the drive head 42. All contact points are sealed. The first liquid chamber 46 and the second liquid chamber 47 are formed by dividing the internal space of the liquid tank 41 by the first sealing head 44 and the second sealing head 45. When the rotating plate 22 rotates, it drives the latch 35, the drive head 42 and the first sealing head 44 to rotate synchronously in sequence, while the second sealing head 45 is fixed on the liquid tank 41 and remains stationary. The rotation of the first sealing head 44 changes its relative position with the second sealing head 45, thereby dynamically changing the volume of the first liquid chamber 46 and the second liquid chamber 47.

[0025] Furthermore, the pressure conversion structure 5 also includes a sealing plate 52 that is slidably and sealingly installed inside the liquid storage cylinder 51. A pressure groove 53 is formed between the sealing plate 52 and the top of the liquid storage cylinder 51. The two pressure grooves 53 are connected to the first liquid chamber 46 and the second liquid chamber 47 respectively through the connecting pipe 54. The transmission medium is located inside the first liquid chamber 46, the second liquid chamber 47, the connecting pipe 54 and the pressure groove 53. When the volume of the first liquid chamber 46 and the second liquid chamber 47 changes, the transmission medium enters and exits the pressure groove 53 through the connecting pipe 54, pushing the sealing plate 52 to slide inside the liquid storage cylinder 51. This structure converts the volume change of the liquid chamber into the displacement of the sealing plate 52, providing a point of application for subsequent application of damping or restoring force. At the same time, by selecting liquid storage cylinders 51 with different cross-sectional areas, the angular displacement can be amplified or reduced, which facilitates precise control of the damping characteristics.

[0026] It is worth noting that the transmission medium is a liquid that cannot be compressed in the working environment. A solenoid valve 55 is fixedly installed on one of the connecting pipes 54. Since the transmission medium is incompressible, when the solenoid valve 55 is closed, the transmission medium is sealed between the liquid chamber and the liquid storage tank 51 and cannot flow. At this time, the first sealing head 44 cannot rotate, thereby locking the rotating plate 22 at the current angle and realizing the rigid bending mode. When the solenoid valve 55 is opened, the transmission medium can flow freely, and the rotating plate 22 can rotate under the action of external force or reset force to realize the angle self-adaptation or reset function. By controlling the opening and closing of the solenoid valve 55, the two working modes of rigid fixed angle and flexible self-adaptation can be switched.

[0027] like Figure 11As shown, this embodiment also includes a pressure control component 6. The pressure control component 6 controls the pressure difference inside the two liquid storage cylinders 51 to be constant. The pressure control component 6 includes a pressure chamber 611 located between the sealing plate 52 and the bottom of the liquid storage cylinder 51. An air pipe 612 is connected to the pressure chamber 611. The other end of the air pipe 612 is connected to an air pump system that controls the air pressure inside the pressure chamber 611. A pressure sensor 613 is connected inside the pressure chamber 611. The air pump system fills or extracts gas into the pressure chamber 611 through the air pipe 612, precisely controlling the pressure chamber 611. The air pressure value inside is monitored and fed back in real time by the air pressure sensor 613. This air pressure acts on the sealing plate 52, applying a constant pressure to the transmission medium in the liquid storage cylinder 51. The pressure of the pressure chambers 611 of the two liquid storage cylinders 51 can be controlled independently, forming a constant pressure difference between the two liquid chambers. This applies a constant magnitude and definite direction of reset torque to the rotating plate 22. Compared with spring reset, the reset force provided by this method does not increase with the increase of the rotation angle, eliminating the control problem caused by the increase of elastic resistance with the angle. Moreover, the magnitude of the reset force can be flexibly changed by adjusting the air pressure value.

[0028] Working principle: The push rod motor 23 drives the pressure head 27 to move linearly along the direction of the rotating plate 22, applying a horizontal bending force to both ends of the workpiece. During this process, since the movement direction of the pressure head 27 is completely consistent with the feed direction of the push rod motor 23 and coincides with the direction of the rotating plate 22, the lateral sliding friction caused by the inconsistent direction in the traditional structure is completely eliminated, ensuring the bending surface quality and angle accuracy. The rotating plate 22 can smoothly deflect under the damping action of the transmission medium flow and automatically fit the end of the workpiece. After the bending is completed, the constant pressure difference provided by the pressure control component 6 drives the rotating plate 22 to automatically reset to the initial position, preparing for the next cycle.

[0029] Example 2; as Figure 12 As shown, based on Embodiment 1, the pressure control component 6 includes a connecting rod 621 fixedly installed on the sealing plate 52. A first counterweight 622 is fixedly installed on one connecting rod 621, and a second counterweight 623 is installed on the other connecting rod 621. There is a gravity difference between the first counterweight 622 and the second counterweight 623. The gravity difference between the first counterweight 622 and the second counterweight 623 acts on the sealing plate 52 through the connecting rod 621, applying pressure in opposite directions to the transmission medium in the two liquid storage cylinders 51. Furthermore, the constant pressure difference is converted into a constant torque acting on the drive head 42, which drives the rotating plate 22 to automatically reset to the initial position. Compared with spring reset, the gravity difference generated by the counterweight is a constant value and does not change with the rotation angle of the rotating plate 22. This completely avoids the problem of greater resistance as the rotation angle increases in spring reset, allowing the rotating plate 22 to obtain a uniform reset force across the entire angle range. This facilitates precise adjustment by the control system. At the same time, this structure does not require complex components such as air source, air pump, and sensors, and can achieve constant force reset solely by gravity.

[0030] The above specific embodiments are merely several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A metal part bending and forming device, comprising a body, characterized in that, Also includes: Multiple sets of forming components are installed on the machine body. The forming components include a base plate fixedly installed on the machine body, a rotating plate rotatably installed on the base plate through a rotating connector, and a pressure head is slidably installed on the rotating plate and a push rod motor for driving the pressure head to move is fixedly installed on the rotating plate. The transmission mechanism and pressure conversion structure are mounted on the substrate. The transmission mechanism includes a first liquid chamber and a second liquid chamber. The pressure conversion structure includes two liquid storage cylinders that are respectively connected to the first liquid chamber and the second liquid chamber. The first liquid chamber, the second liquid chamber, and the liquid storage cylinders are all filled with a transmission medium. The transmission mechanism changes the volume of the first liquid chamber and the second liquid chamber as the rotating plate rotates. A pressure control component that controls the pressure difference between the two liquid storage tanks to remain constant. The rotating connector includes a connecting pin snapped onto the rotating plate, a limiting plate inserted into the connecting pin, a rotating ring rotatably mounted on the limiting plate, and a locking buckle fixedly mounted on the connecting pin to press the rotating ring together. The transmission mechanism includes a liquid tank fixedly mounted on the base plate and a drive head fixedly mounted on a rotating connector that rotates with the rotating plate. The drive head is rotatably connected to the liquid tank and sealed by a sealing ring. A first sealing head is fixedly mounted on the drive head, and a second sealing head is fixedly mounted on the liquid tank. The first and second sealing heads form a seal at their contact points with the liquid tank and the drive head. The first and second liquid cavities are formed by the first and second sealing heads dividing the internal space of the liquid tank. The pressure conversion structure also includes a sealing plate that is slidably and sealed inside the liquid storage cylinder. A pressure groove is formed between the sealing plate and the top of the liquid storage cylinder. The two pressure grooves are connected to the first liquid chamber and the second liquid chamber respectively through connecting pipes.

2. The metal part bending and forming device according to claim 1, characterized in that, A guide rail is fixedly mounted on the rotating plate, and multiple sliders are slidably mounted on the guide rail. A mounting plate is fixedly mounted on the multiple sliders. The pressure head is fixedly connected to the mounting plate, and the output shaft of the push rod motor is fixedly connected to the mounting plate.

3. The metal part bending and forming device according to claim 2, characterized in that, Multiple balls are rotatably mounted on the rotating ring, and the limiting plate is provided with a groove to accommodate the balls.

4. The metal part bending and forming device according to claim 3, characterized in that, The top of the connecting pin is provided with a polygonal top plate, and the rotating plate is provided with a groove to accommodate the top plate.

5. A metal part bending and forming device according to claim 4, characterized in that, The transmission medium is located inside the first liquid chamber, the second liquid chamber, the connecting pipe, and the pressure tank. The transmission medium is a liquid that cannot be compressed under working conditions. A solenoid valve is fixedly installed on one of the connecting pipes.

6. The metal part bending and forming device according to claim 5, characterized in that, The pressure control component includes a pressure chamber located between the sealing plate and the bottom of the liquid storage cylinder. An air pipe is connected to the pressure chamber, and the other end of the air pipe is connected to an air pump system that controls the air pressure inside the pressure chamber. An air pressure sensor is connected inside the pressure chamber.

7. A metal part bending and forming device according to claim 6, characterized in that, The pressure control component includes connecting rods fixedly installed on the sealing plate, one of the connecting rods having a first counterweight fixedly installed on it, and the other connecting rod having a second counterweight installed on it, with a gravity difference between the first counterweight and the second counterweight.

Images