Self-propelled semi-ring bending machine with oil cylinder support

Abstract

The application discloses a self-propelled semi-ring bending machine of oil cylinder support, which comprises a machine base, a swing arm, an oil cylinder, an inner-arc module, an outer-arc module, a rectangular module and a central shaft arranged on the machine base, an arc-shaped channel is formed between the inner-arc module and the outer-arc module, a rectangular channel is formed between the outer-arc module and the rectangular module, the rectangular channel is used for placing unbent workpieces, the arc-shaped channel is used for placing bent parts of the workpieces, the central shaft is coaxially arranged on the machine base with the inner-arc module, one end of the swing arm is connected with the central shaft, and the other end of the swing arm is connected with the oil cylinder, roller shafts are arranged on the swing arm, and rollers are arranged on the roller shafts. The application adopts a three-section bending operation mode to realize bending of the workpieces. Since the segmented local output bending mode is adopted, the effective bending force is greatly improved, so that the direct cold bending of the workpieces is realized. The application not only simplifies the process and improves the bending efficiency, but also has excellent guarantee for the bending precision and ensures good and stable bending quality.

Description

Technical Field

[0001] This invention belongs to the field of metallurgy and relates to semi-ring bending machine technology, specifically to a self-propelled semi-ring bending machine with a hydraulic cylinder support. Background Technology

[0002] A bending machine is a device that bends a workpiece into a specified curved shape. A semi-circular bending machine bends a workpiece into a semi-circular structure. The existing semi-circular bending process forms the workpiece into a semi-circular curved shape by pressing the upper and lower dies together. This method has many drawbacks, as follows:

[0003] 1. Because the workpiece needs to be bent in one go, it cannot be directly pressed down and bent. The workpiece must first be heated to a specified temperature, usually ≥600℃, and then placed on the equipment for bending. After bending, the workpiece also needs to be cooled, which is time-consuming, labor-intensive and inefficient.

[0004] 2. Due to factors such as the downward pressure and mold error, the final semi-ring structure has low precision and is prone to damage to the workpiece during bending, affecting product quality. Summary of the Invention

[0005] Purpose of the invention: In order to overcome the shortcomings of the existing technology, a self-propelled semi-ring bending machine with a hydraulic cylinder support is provided. It achieves bending of the workpiece by performing two three-stage bending operations. Due to the use of segmented local force bending, the effective bending force is greatly improved, thereby realizing the direct cold bending of the workpiece. It not only simplifies the process and improves the bending efficiency, but also provides excellent bending accuracy and ensures good and stable bending quality.

[0006] Technical Solution: To achieve the above objectives, this invention provides a self-propelled semi-circular bending machine with a hydraulic cylinder support, comprising a base, a swing arm, a hydraulic cylinder, and an inner arc module, an outer arc module, a rectangular module, and a central shaft mounted on the base. An arc-shaped channel is formed between the inner and outer arc modules, and a rectangular channel is formed between the outer arc module and the rectangular module. The rectangular channel is used to place an unbent workpiece, and the arc-shaped channel is used to place the bent portion of the workpiece. The central shaft is coaxially mounted on the base with the inner arc module. One end of the swing arm is connected to the central shaft, and the other end is connected to the hydraulic cylinder. A roller shaft and rollers mounted on the roller shaft are provided on the swing arm. The hydraulic cylinder is used to drive the swing arm to rotate along the central shaft, and the rollers are used to bend the workpiece along the inner arc module when the swing arm rotates.

[0007] Furthermore, a cylinder support is provided at the tail end of the cylinder, which is used to support the cylinder.

[0008] Furthermore, the head of the hydraulic cylinder is fixed to the rocker arm by a pin.

[0009] Furthermore, the opposite surfaces of the outer arc module and the inner arc module have the same arc surface as the inner arc module.

[0010] Furthermore, the central shaft extends longitudinally through the base and the inner arc module, the inner arc module is fixed to the top surface of the base with screws, and the top of the central shaft is fixed to the inner arc module with screws.

[0011] Furthermore, the outer curved area of ​​the base is provided with an arc-shaped edge that matches the inner arc module, and a curved platform is formed between the arc-shaped edge on the base and the inner arc module.

[0012] Furthermore, the end of the base near the oil cylinder extends outward to form a limiting part, the rectangular module is fixed on the top surface of the limiting part, and the inner side of the limiting part is used to reset and limit the swing arm.

[0013] The present invention also provides a method for operating a self-propelled semi-ring bending machine with a hydraulic cylinder support, comprising the following steps:

[0014] S1: Place the rectangular workpiece on the rectangular channel between the outer arc module and the rectangular module, with one end of the workpiece inside the rectangular channel and the other end extending out of the rectangular channel;

[0015] S2: The swing arm rotates along the central axis by the push of the hydraulic cylinder. During the rotation of the swing arm, half of the workpiece is bent by the roller. After the three-stage bending operation, half of the workpiece forms an arc segment. The arc segment is located on the bending platform and its inner side is in contact with the inner arc module.

[0016] S3: Reset the swing arm and cylinder to their initial positions, lift the workpiece out, and insert the bent arc section of the workpiece into the arc channel between the inner arc module and the outer arc module. The unbent half of the workpiece is then in the bending operation position.

[0017] S4: Continue with the three-stage bending operation of step S2 to bend the other half of the workpiece into an arc-shaped segment;

[0018] S5: After step S4, the entire workpiece forms a semi-ring structure, completing the bending operation of the entire workpiece.

[0019] Furthermore, the specific process of the three-stage bending operation in steps S2 and S4 is as follows:

[0020] A1: The hydraulic cylinder pushes the swing arm from the initial position, the swing arm performs the first rotation stroke, and the roller performs the first bending operation on the workpiece. When the hydraulic cylinder extends out of the full stroke, the first bending operation is completed. At this time, oil enters the rod chamber of the hydraulic cylinder, pulling the hydraulic cylinder support to the second bending operation position.

[0021] A2: The hydraulic cylinder pushes the swing arm from the second bending operation position, the swing arm performs the second rotation stroke, and the roller performs the second bending operation on the workpiece. When the hydraulic cylinder pushes out the full stroke, the second bending operation is completed. At this time, oil enters the rod chamber of the hydraulic cylinder, pulling the hydraulic cylinder support to the third bending operation position.

[0022] A3: The hydraulic cylinder pushes the swing arm from the third bending position, the swing arm performs the third rotation stroke, the roller performs the third bending operation on the workpiece, and when the hydraulic cylinder extends out of its full stroke, the third bending operation is completed, an arc-shaped segment is formed on the workpiece, and the hydraulic cylinder, hydraulic cylinder support and swing arm return to the initial position.

[0023] Furthermore, in the three-stage bending operation of steps S2 and S4, the rotation angle range of each working arm is 30 to 35 degrees, ensuring that the three-stage bending can cover the bent part of the workpiece.

[0024] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0025] 1. It can independently bend the two halves of the workpiece, and the bending operation adopts a three-stage bending form, which can apply sufficient bending force to each bending section of the workpiece. While ensuring bending quality, it realizes the direct cold bending treatment of the workpiece, eliminating the heating process before bending and the cooling process after bending. This not only reduces manpower input, but also significantly shortens the process time and improves the bending efficiency of the workpiece.

[0026] 2. Due to the coordinated arrangement of the inner arc module, outer arc module, and rectangular module on the machine base, each segment of the workpiece bending process can be precisely and stably controlled, resulting in a semi-ring structure with good precision. The precision is significantly improved compared to existing bending machines, and the bending quality of the workpiece is effectively guaranteed.

[0027] 3. Throughout the entire three-stage bending operation, the hydraulic cylinder moves automatically without human intervention, making the bending operation simple and reliable, and possessing many advantages such as simple operation and low intensity. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of the present invention when the first half of the bending operation is completed;

[0029] Figure 2 This is a side view of the structural structure of the present invention;

[0030] Figure 3 This is a schematic diagram illustrating the three-segment bending process in this invention;

[0031] Figure 4 This is a three-dimensional structural diagram of the present invention before the second half bending operation; Detailed Implementation

[0032] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. After reading this invention, any modifications of the invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0033] like Figure 1 and Figure 2 As shown, this invention provides a self-propelled semi-circular bending machine with a hydraulic cylinder support, including a base 1, a swing arm 8, a hydraulic cylinder 9, and an inner arc module 2, an outer arc module 3, a rectangular module 4, and a central shaft 7 mounted on the base 1. The inner arc module 2 has a disc structure, and the outer arc module 3 has the same arc surface as the inner arc module 2 on its opposite surface. An arc-shaped channel 5 is formed between the inner arc module 2 and the outer arc module 3, and a rectangular channel 6 is formed between the outer arc module 3 and the rectangular module 4. The rectangular channel 6 is used to place an unbent workpiece 14, and the arc-shaped channel 5 is used to place the bent part of the workpiece 14. The central shaft 7 is coaxially mounted on the base 1 with the inner arc module 2, and the central shaft 7 extends longitudinally through the base 1 and the inner arc module 2. The inner arc module 2 is fixed to the top surface of the base 1 with screws, and the top of the central shaft 7 is fixed to the inner arc module 2 with screws. One end of the swing arm 8 is connected to the central shaft 7. Shaft 7 is located on the part below the machine base 1, and the other end is fixedly connected to the head of the hydraulic cylinder 9 by a pin 11. The tail of the hydraulic cylinder 9 is provided with a hydraulic cylinder support 10, which is used to support the hydraulic cylinder 9. A roller shaft 13 and a roller 12 mounted on the roller shaft 13 are provided at the middle position of the swing arm 8. The outer curved area of ​​the machine base 1 is provided with an arc-shaped edge 17 that matches the inner arc module 2. A bending platform 16 is formed between the arc-shaped edge 17 and the inner arc module 2 on the machine base 1. The end of the machine base 1 near the hydraulic cylinder 9 extends outward to form a limiting part 18. The rectangular module 4 is fixed to the top surface of the limiting part 18 by screws. The inner side of the limiting part 18 is used to reset and limit the swing arm 8. The hydraulic cylinder 9 is used to push the swing arm 8 to rotate along the central shaft 7. The roller 12 is used to bend the workpiece 14 along the inner arc module 2 when the swing arm 8 rotates.

[0034] In this embodiment, when the swing arm 8 is in the initial position, that is, when it is against the limiting part 5, the roller 12 is in a radially symmetrical relationship with the central shaft 7 and the inner arc module 2, and the swing arm 8 maintains this positional relationship during the rotation process.

[0035] Based on the above scheme, this embodiment applies the aforementioned semi-ring bending machine, specifically bending a rectangular workpiece 14 into a semi-ring structure. Therefore, an operating method for a self-propelled semi-ring bending machine with a hydraulic cylinder support is provided, referring to... Figure 1 and Figure 2 It includes the following steps:

[0036] S1: Place the rectangular workpiece 14 on the rectangular channel 6 between the outer arc module 3 and the rectangular module 4. One end of the workpiece 14 is located inside the rectangular channel 6, and the other end extends out of the rectangular channel 6. Adjust the position of the workpiece 14 so that the center line of the workpiece 14 is exactly on the axis of the roller 12. The roller 12 and the inner arc module 2 are respectively attached to the two sides of the workpiece 14.

[0037] S2: The hydraulic cylinder 9 pushes the swing arm 8 to rotate along the central axis 7. During the rotation of the swing arm 8, the roller 12 bends half of the workpiece 14. After the three-stage bending operation, half of the workpiece 14 forms an arc segment 15. The arc segment 15 is located on the bending platform 16, and its inner side is in contact with the inner arc module 2, as shown in the figure. Figure 1 As shown;

[0038] S3: Reference Figure 4 The swing arm 8 and the cylinder 9 are reset to their initial positions. The workpiece 14 is lifted out and the curved section 15 of the workpiece 14 is inserted into the arc channel 5 between the inner arc module 2 and the outer arc module 3. The unbent half of the workpiece 14 is then in the bending operation position.

[0039] S4: Continue the three-stage bending operation of step S2 to bend the other half of workpiece 14 into an arc segment;

[0040] S5: After step S4, the entire workpiece forms a semi-ring structure, completing the bending operation of the entire workpiece.

[0041] Reference Figure 3 and Figure 4 In this embodiment, the specific process of the three-stage bending operation in steps S2 and S4 is as follows:

[0042] A1: Perform the first bending operation:

[0043] Hydraulic cylinder 9 is in its initial position, at which time swing arm 8 is located at limit part 18, and hydraulic cylinder support 10 is located at... Figure 3 At point a, the hydraulic cylinder 9 starts pushing the swing arm 8 from its initial position. The swing arm 8 performs the first rotation stroke, and the roller 12 performs the first bending operation on the workpiece 14. During the first rotation stroke, the swing arm 8 rotates at an angle of 32 degrees. When the hydraulic cylinder 9 extends its full stroke, the first bending operation is completed. At this time, oil enters the rod chamber of the hydraulic cylinder 9, pulling the hydraulic cylinder support 10 to the position for the second bending operation, which is... Figure 3 Point b in the middle;

[0044] It should be noted that the principle by which hydraulic cylinder 9 pulls hydraulic cylinder support 10 is as follows: Hydraulic cylinder 9 initially receives oil in its rodless chamber, causing the piston rod to extend and thus push the swing arm 8 to perform the first stage of rotation. Once the first stage of bending is completed, hydraulic cylinder 9 receives oil in its rod chamber and discharges oil from its rodless chamber. At this point, the cylinder barrel advances, and the cylinder returns to its initial position (ready to work), meaning it can pull hydraulic cylinder support 10 to the second stage of bending position. The principle in steps A2 and A3 below is the same.

[0045] A2: Perform the second bending operation:

[0046] Hydraulic cylinder 9 starts pushing swing arm 8 from the second bending operation position. Swing arm 8 performs the second rotation stroke, and roller 12 performs the second bending operation on workpiece 14. During the second rotation stroke, the rotation angle of swing arm 8 is 32 degrees. When hydraulic cylinder 9 extends its full stroke, the second bending operation is completed. At this time, oil enters the rod chamber of hydraulic cylinder 9, pulling hydraulic cylinder support 10 to the third bending operation position, which is... Figure 3 At point c in the middle;

[0047] A3: Perform the third bending operation:

[0048] The hydraulic cylinder 9 starts pushing the swing arm 8 from the third bending operation position. The swing arm 8 performs the third rotation stroke. The roller 12 performs the third bending operation on the workpiece 14. The rotation angle of the swing arm 8 during the third rotation stroke is 32 degrees. When the hydraulic cylinder 9 extends out of the full stroke, the third bending operation is completed, and an arc segment 15 is formed on the workpiece 14. The hydraulic cylinder 9, the hydraulic cylinder support 10 and the swing arm 8 return to the initial position.

[0049] As can be seen from the above bending process, the present invention has the following advantages:

[0050] 1. It can independently bend the two halves of the workpiece 14, and the bending operation adopts a three-stage bending form, which can apply sufficient bending force to each bending part of the workpiece 14. While ensuring the bending quality, it realizes the direct cold bending treatment of the workpiece 14, eliminating the heating process before bending and the cooling process after bending. This not only reduces manpower input, but also significantly shortens the process time and improves the bending efficiency of the workpiece.

[0051] 2. Due to the coordinated arrangement of the inner arc module 2, outer arc module 3, and rectangular module 4 on the machine base 1, each segment of the bending process of the workpiece 14 can be precisely and stably controlled, resulting in a semi-ring structure with good precision. The precision is significantly improved compared to existing bending machines, and the bending quality of the workpiece is effectively guaranteed.

[0052] 3. Throughout the entire three-stage bending operation, the hydraulic cylinder 9 moves automatically without human intervention, making the bending operation simple and reliable, and possessing many advantages such as simple operation and low intensity.

Claims

1. A method for operating a self-propelled semi-circular bending machine with a hydraulic cylinder support, characterized in that, The self-propelled semi-circular bending machine with hydraulic cylinder support includes a base, a swing arm, a hydraulic cylinder, and an inner arc module, an outer arc module, a rectangular module, and a central shaft mounted on the base. An arc-shaped channel is formed between the inner arc module and the outer arc module, and a rectangular channel is formed between the outer arc module and the rectangular module. The rectangular channel is used to place the unbent workpiece, and the arc-shaped channel is used to place the bent part of the workpiece. The central shaft is coaxially mounted on the base with the inner arc module. One end of the swing arm is connected to the central shaft, and the other end is connected to the hydraulic cylinder. The swing arm is equipped with a roller shaft and rollers mounted on the roller shaft. The hydraulic cylinder is used to push the swing arm to rotate along the central shaft, and the rollers are used to bend the workpiece along the inner arc module when the swing arm rotates. The operation method includes the following steps: S1: Place the rectangular workpiece on the rectangular channel between the outer arc module and the rectangular module, with one end of the workpiece inside the rectangular channel and the other end extending out of the rectangular channel; S2: The swing arm rotates along the central axis by the push of the hydraulic cylinder. During the rotation of the swing arm, half of the workpiece is bent by the roller. After the three-stage bending operation, half of the workpiece forms an arc segment. The arc segment is located on the bending platform and its inner side is in contact with the inner arc module. S3: Reset the swing arm and cylinder to their initial positions, lift the workpiece out, and insert the bent arc section of the workpiece into the arc channel between the inner arc module and the outer arc module. The unbent half of the workpiece is then in the bending operation position. S4: Continue with the three-stage bending operation of step S2 to bend the other half of the workpiece into an arc-shaped segment; S5: After step S4, the entire workpiece forms a semi-ring structure, completing the bending operation of the entire workpiece.

2. The operating method according to claim 1, characterized in that, The cylinder is provided with a cylinder support at its tail end, which is used to support the cylinder.

3. The operating method according to claim 1, characterized in that, The head of the hydraulic cylinder is fixed to the swing arm by a pin.

4. The operating method according to claim 1, characterized in that, The outer arc module and the inner arc module have the same arc surface as the inner arc module on their opposite surfaces.

5. The operating method according to claim 1, characterized in that, The central shaft runs longitudinally through the base and the inner arc module. The inner arc module is fixed to the top surface of the base with screws, and the top of the central shaft is fixed to the inner arc module with screws.

6. The operating method according to claim 1, characterized in that, The outer curved area of ​​the base is provided with an arc-shaped edge that matches the inner arc module, and a curved platform is formed between the arc-shaped edge and the inner arc module on the base.

7. The operating method according to claim 1, characterized in that, The end of the base near the oil cylinder extends outward to form a limiting part. The rectangular module is fixed on the top surface of the limiting part, and the inner side of the limiting part is used to reset and limit the swing arm.

8. The operating method according to claim 1, characterized in that, The specific procedures for the three-stage bending operation in steps S2 and S4 are as follows: A1: The hydraulic cylinder pushes the swing arm from the initial position, the swing arm performs the first rotation stroke, and the roller performs the first bending operation on the workpiece. When the hydraulic cylinder extends out of the full stroke, the first bending operation is completed. At this time, oil enters the rod chamber of the hydraulic cylinder, pulling the hydraulic cylinder support to the second bending operation position. A2: The hydraulic cylinder pushes the swing arm from the second bending operation position, the swing arm performs the second rotation stroke, and the roller performs the second bending operation on the workpiece. When the hydraulic cylinder pushes out the full stroke, the second bending operation is completed. At this time, oil enters the rod chamber of the hydraulic cylinder, pulling the hydraulic cylinder support to the third bending operation position. A3: The hydraulic cylinder pushes the swing arm from the third bending position, the swing arm performs the third rotation stroke, the roller performs the third bending operation on the workpiece, and when the hydraulic cylinder extends out of its full stroke, the third bending operation is completed, an arc segment is formed on the workpiece, and the hydraulic cylinder, hydraulic cylinder support and swing arm return to the initial position.

9. The operating method according to claim 1, characterized in that, In the three-segment bending operation of steps S2 and S4, the rotation angle range of the swing arm in each segment is 30~35 degrees.

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