Numerical control high-precision automatic bending machine for oilfield equipment parts manufacturing
The automatic bending machine, which combines a CNC system with a high-precision hydraulic drive, has solved the problems of insufficient processing accuracy, low automation, and high energy consumption in the manufacturing of oilfield equipment parts, and has achieved high-precision, low-cost mass production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
- Filing Date
- 2025-06-19
- Publication Date
- 2026-07-07
AI Technical Summary
The existing bending machines used in the manufacturing of oilfield equipment parts suffer from problems such as insufficient processing accuracy, low degree of automation, poor stability of hydraulic drive, low integration of CNC system and high energy consumption, making it difficult to meet the high-precision processing requirements of high-strength steel and complex structural parts.
The automatic bending machine adopts a combination of CNC system and high-precision hydraulic drive, integrates position detection sensor and stroke limit block to realize closed-loop control, and with the help of multi-sensor monitoring and modular design, realizes fully automated production.
It improves processing accuracy and automation, reduces energy consumption and maintenance costs, meets the high-precision processing requirements of high-strength steel and complex structural parts, and is suitable for mass production.
Smart Images
Figure CN224463489U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a high-precision automatic bending machine, specifically a CNC high-precision automatic bending machine for manufacturing oilfield equipment parts. Background Technology
[0002] Currently, bending is a key process in the manufacturing of oilfield equipment components, especially with the increasing demand for high-precision bending of high-strength steel and complex structural parts. Traditional oilfield equipment component bending machines mostly use mechanical or ordinary hydraulic drives, which present the following technical bottlenecks:
[0003] 1. Insufficient machining accuracy: The positioning system of traditional bending machines mostly relies on mechanical limiters or simple sensors, which is difficult to meet the millimeter-level accuracy requirements of oilfield equipment parts (such as high-pressure pipes, support structures, etc.). Especially in multiple bending processes, the cumulative error is significant, resulting in a low workpiece qualification rate.
[0004] 2. Low level of automation: Existing equipment mostly requires manual feeding, positioning and adjustment of bending parameters, which cannot achieve fully automated production. Not only is the production efficiency low, but manual intervention is also prone to introducing operational errors, making it difficult to adapt to the needs of batch processing.
[0005] 3. Poor stability of hydraulic drive: The pressure control precision of traditional hydraulic systems is insufficient, and pressure fluctuations are prone to occur during bending, resulting in large deviations in the bending angle and curvature of the workpiece. This is especially true for high-strength materials, which cannot guarantee bending consistency.
[0006] 4. Low integration of CNC system: Although some equipment is equipped with CNC system, its ability to coordinate control with hydraulic drive and transmission mechanism is insufficient, making it impossible to achieve multi-axis linkage control, making it difficult to complete complex curved surface or multi-dimensional bending processing, and limiting the design flexibility of parts.
[0007] 5. High energy consumption and maintenance costs: Traditional equipment has low energy efficiency and its mechanical transmission parts are prone to wear and tear, requiring frequent maintenance, which increases the production cost of oilfield equipment manufacturing and does not conform to the development trend of intelligent and green manufacturing.
[0008] In view of the above problems, there is an urgent need to design an automatic bending machine with a high-precision CNC system, hydraulic drive, and transmission mechanism coordinated control to meet the higher requirements for precision, efficiency, and automation in the manufacturing of oilfield equipment parts. This invention achieves precise control of the bending process by integrating a CNC system, high-precision hydraulic drive, and multi-sensor monitoring, effectively overcoming the shortcomings of existing technologies. Utility Model Content
[0009] A high-precision CNC automatic bending machine for manufacturing oilfield equipment parts includes: a workpiece feeding guide rail, an upper bending die, a bending drive wheel, a hydraulic drive cylinder, hydraulic pipelines, a hydraulic control valve, a workpiece positioning fixture, a guide positioning block, a lower die support frame, an equipment base, a lower bending die, a synchronous clamping assembly, a position detection sensor, a transmission idler wheel, a main drive motor, a transmission pulley, a side protective plate, a stroke limit block, an end clamping device, a transmission pinion, an arc-shaped transmission rack, an equipment frame, a lifting and adjusting mechanism, a sliding guide rail, an electrical control box, and a discharge gripper. The equipment frame is vertically fixed to the center of the upper surface of the equipment base. The lower bending die is fixed to the upper surface of the equipment base by bolts through symmetrically arranged lower die support frames and is located in front of the equipment frame. The top of the upper bending die is rigidly connected to the output end of the hydraulic drive cylinder. The workpiece feeding guide rail is horizontally installed at the front end of the top of the equipment frame, and its conveying direction is directly opposite the bending station between the upper and lower bending dies. The main drive motor is fixed to the rear side of the equipment frame and is connected to the bending drive wheel at the front of the equipment frame through a transmission pulley and a transmission idler pulley. The bending drive wheel meshes with the arc-shaped transmission rack through a transmission pinion. The electrical control box is embedded on the right side of the equipment frame. Its integrated CNC system is electrically connected to the hydraulic drive cylinder, the main drive motor, and the position detection sensor located on the left side of the bending station through cables.
[0010] The bending upper die and the hydraulic drive cylinder are connected by two parallel sliding guide rails. The sliding guide rails are vertically fixed to the front side of the equipment frame. The hydraulic drive cylinder is connected to the hydraulic control valve and the hydraulic oil tank through hydraulic pipelines. The hydraulic control valve is fixed to the left side of the equipment frame and is controlled by the electrical control box.
[0011] Three sets of guide positioning blocks are equidistantly arranged on the left side of the workpiece feeding guide rail along the feeding direction, and a workpiece positioning fixture is fixed on the right side. The workpiece positioning fixture is fixed to the top of the equipment frame by bolts. Synchronous clamping components are symmetrically arranged on both sides of the upper bending die, and an end clamping device is fixed on the right side of the lower bending die end.
[0012] The arc-shaped transmission rack is fixed vertically to the rear side of the upper bending die. The transmission pinion and the bending drive wheel are coaxially fixed in the bearing seat at the front end of the equipment frame. The output shaft of the main drive motor drives the transmission idler wheel to rotate through the transmission belt pulley. The transmission idler wheel is connected to the bending drive wheel through the transmission shaft.
[0013] The electrical control box is electrically connected to the stroke limit block located below the stroke path of the hydraulic drive cylinder via a cable. A lifting adjustment mechanism is located at the center of the top of the equipment frame. The output end of the lifting adjustment mechanism is connected to the top of the bending upper die and is controlled by the electrical control box.
[0014] On the right side of the upper surface of the equipment base, at the material discharge end of the bending lower die, there is a discharge gripper. The discharge gripper is controlled by an independent drive mechanism, which is electrically connected to the electrical control box via a cable. Side protective plates are bolted to the front, rear, and left sides of the equipment frame.
[0015] Compared with the prior art, the beneficial effects achieved by this utility model are:
[0016] 1. This utility model, through closed-loop control of CNC system and hydraulic drive, combined with position detection sensor and stroke limit block, achieves bending angle error ≤ ±0.5° and linear accuracy of ±0.1mm, meeting the high-precision processing requirements of oilfield high-pressure pipe fittings, precision supports and other parts.
[0017] 2. This utility model automates the entire process of feeding, positioning, bending, and unloading, reducing manual intervention and shortening the processing cycle of a single workpiece by 40% compared to traditional equipment, making it suitable for mass production.
[0018] 3. The main drive motor and hydraulic drive cylinder of this utility model work together to provide high torque through the hydraulic system to cope with high-strength steel, and to achieve smooth motion control through the mechanical transmission mechanism, thereby reducing pressure fluctuation errors during the bending process.
[0019] 4. The lifting and adjusting mechanism and sliding guide rail of this utility model support bending of workpieces with different thicknesses (0.5-10mm). The combination of arc-shaped transmission rack and transmission pinion can realize multi-angle bending from 0-180°, meeting the diversified design needs of oilfield equipment parts.
[0020] 5. The CNC system of this utility model adjusts the power output as needed, reducing energy consumption by 25% compared to traditional hydraulic bending machines; the modular design (such as independent hydraulic units and detachable transmission components) facilitates maintenance and reduces maintenance costs by 30%. Attached Figure Description
[0021] Figure 1 Schematic diagram of the overall structure of this utility model
[0022] Figure 2 This is a schematic diagram of the hydraulic drive and transmission system of this utility model.
[0023] Figure 3 This is a schematic diagram of the workpiece positioning and clamping device of this utility model.
[0024] Figure 4 This is a schematic diagram of the numerical control system and testing device of this utility model.
[0025] In the diagram: 1. Workpiece feeding guide rail, 2. Upper bending die, 3. Bending drive wheel, 4. Hydraulic drive cylinder, 5. Hydraulic pipeline, 6. Hydraulic control valve, 7. Workpiece positioning fixture, 8. Guide positioning block, 9. Lower die support frame, 10. Equipment base, 11. Lower bending die, 12. Synchronous clamping assembly, 13. Position detection sensor, 14. Transmission idler wheel, 15. Main drive motor, 16. Transmission pulley, 17. Side protection plate, 18. Stroke limit block, 19. End clamping device, 20. Transmission pinion, 21. Arc-shaped transmission rack, 22. Equipment frame, 23. Lifting and adjusting mechanism, 24. Sliding guide rail, 25. Electrical control box, 26. Discharge gripper. Detailed Implementation
[0026] The present invention will be further described below with reference to the accompanying drawings:
[0027] This utility model includes a workpiece feeding guide rail 1, an upper bending die 2, a bending drive wheel 3, a hydraulic drive cylinder 4, a hydraulic pipeline 5, a hydraulic control valve 6, a workpiece positioning fixture 7, a guide positioning block 8, a lower die support frame 9, an equipment base 10, a lower bending die 11, a synchronous clamping assembly 12, a position detection sensor 13, a transmission idler wheel 14, a main drive motor 15, a transmission pulley 16, a side protective plate 17, a stroke limit block 18, an end clamping device 19, a transmission pinion 20, an arc-shaped transmission rack 21, an equipment frame 22, a lifting and adjusting mechanism 23, a sliding guide rail 24, an electrical control box 25, and a discharge gripper 26.
[0028] Combination Figure 1-4As shown, the equipment frame 22 is vertically fixed to the center of the upper surface of the equipment base 10. The lower bending die 11 is fixed to the upper surface of the equipment base 10 by bolts through symmetrically arranged lower die support frames 9 and is located in front of the equipment frame 22. The top of the upper bending die 2 is rigidly connected to the output end of the hydraulic drive cylinder 4. The workpiece feeding guide rail 1 is horizontally installed at the front end of the top of the equipment frame 22, and its conveying direction is directly opposite to the bending station between the upper bending die 2 and the lower bending die 11. The main drive motor 15 is fixed to the rear side of the equipment frame 22 and is connected to the bending drive wheel 3 at the front end of the equipment frame 22 through the transmission pulley 16 and the transmission idler wheel 14. The bending drive wheel 3 meshes with the arc-shaped transmission rack 21 through the transmission pinion 20. The electrical control box 25 is embedded on the right side of the equipment frame 22. Its integrated CNC system is electrically connected to the hydraulic drive cylinder 4, the main drive motor 15 and the position detection sensor 13 located on the left side of the bending station through cables. The upper bending die 2 and the hydraulic drive cylinder 4 are connected by two parallel sliding guide rails 24. The sliding guide rails 24 are vertically fixed to the front side of the equipment frame 22. The hydraulic drive cylinder 4 is connected to the hydraulic control valve 6 and the hydraulic oil tank through the hydraulic pipeline 5. The hydraulic control valve 6 is fixed to the left side of the equipment frame 22 and controlled by the electrical control box 25. Three sets of guide positioning blocks 8 are equidistantly arranged on the left side of the workpiece feeding guide rail 1 along the feeding direction. A workpiece positioning fixture 7 is fixed on the right side. The workpiece positioning fixture 7 is fixed to the top of the equipment frame 22 by bolts. Synchronous clamping assemblies 12 are symmetrically arranged on both sides of the upper bending die 2. An end clamping device 19 is fixed to the right side of the end of the lower bending die 11. An arc-shaped transmission rack 21 is fixed vertically to the rear side of the upper bending die 2. A transmission pinion 20 is coaxially fixed to the bending drive wheel 3 within the front bearing seat of the equipment frame 22. The output shaft of the main drive motor 15 drives the transmission idler wheel 14 to rotate via the transmission pulley 16. The transmission idler wheel 14 is connected to the bending drive wheel 3 via a transmission shaft. The electrical control box 25 is electrically connected to the travel limit block 18 located below the travel path of the hydraulic drive cylinder 4 via a cable. A lifting adjustment mechanism 23 is located at the center of the top of the equipment frame 22. The output end of the lifting adjustment mechanism 23 is connected to the top of the upper bending die 2 and controlled by the electrical control box 25. A discharge gripper 26 is fixed on the right side of the upper surface of the equipment base 10 at the discharge end of the lower bending die 11. The discharge gripper 26 is controlled by an independent drive mechanism, which is electrically connected to the electrical control box 25 via a cable. Side protective plates 17 are bolted to the front, rear, and left sides of the equipment frame 22. The workpiece is conveyed to the bending station by the workpiece feeding guide rail 1. After being precisely positioned by the workpiece positioning fixture 7 and the guide positioning blocks 8 arranged along the feeding direction, the synchronous clamping assembly 12 and the end clamping device 19 fix the workpiece on both sides of the upper bending die 2 and the end of the lower bending die 11, respectively. The CNC system of the electrical control box 25 controls the hydraulic drive cylinder 4 to drive the upper bending die 2 to press down along the sliding guide rail 24 through the hydraulic pipeline 5 and the hydraulic control valve 6, so as to cooperate with the lower bending die 11 fixed on the equipment base 10 for bending.The main drive motor 15 drives the bending drive wheel 3 to rotate via the transmission pulley 16 and the transmission idler wheel 14. The wheel then meshes with the coaxial transmission pinion 20 and the arc-shaped transmission rack 21 to assist in controlling the bending speed and pressure. The position detection sensor 13 monitors the bending stroke in real time. When the stroke limit block 18 is triggered, the CNC system controls the hydraulic drive cylinder 4 to stop. After bending is completed, the discharge gripper 26 on the equipment base 10 transfers the workpiece to the unloading area. During this process, the lifting adjustment mechanism 23 can adjust the height of the upper bending die 2, working in conjunction with the sliding guide rail 24 to ensure accuracy and achieve fully automated operation.
Claims
1. A high-precision automatic bending machine for manufacturing oilfield equipment parts, comprising: a workpiece feeding guide rail (1), an upper bending die (2), a bending drive wheel (3), a hydraulic drive cylinder (4), a hydraulic pipeline (5), a hydraulic control valve (6), a workpiece positioning fixture (7), a guide positioning block (8), a lower die support frame (9), an equipment base (10), a lower bending die (11), a synchronous clamping assembly (12), a position detection sensor (13), a transmission idler wheel (14), a main drive motor (15), a transmission pulley (16), a side protection plate (17), a stroke limit block (18), an end clamping device (19), a transmission pinion (20), an arc-shaped transmission rack (21), an equipment frame (22), a lifting adjustment mechanism (23), a sliding guide rail (24), an electrical control box (25), and a discharge gripper (26); characterized in that: The equipment frame (22) is vertically fixed to the center of the upper surface of the equipment base (10). The bending lower die (11) is fixed to the upper surface of the equipment base (10) by bolts through symmetrically arranged lower die support frames (9), and is located in front of the equipment frame (22). The top of the bending upper die (2) is rigidly connected to the output end of the hydraulic drive cylinder (4). The workpiece feeding guide rail (1) is horizontally installed at the front end of the top of the equipment frame (22), and its conveying direction is directly opposite to the bending station between the bending upper die (2) and the bending lower die (11). The main drive motor ( 15) Fixed to the rear side of the equipment frame (22), and connected to the bending drive wheel (3) at the front end of the equipment frame (22) via the transmission pulley (16) and the transmission idler wheel (14). The bending drive wheel (3) meshes with the arc-shaped transmission rack (21) via the transmission pinion (20). The electrical control box (25) is embedded on the right side of the equipment frame (22). Its integrated CNC system is electrically connected to the hydraulic drive cylinder (4), the main drive motor (15) and the position detection sensor (13) located on the left side of the bending station via cables.
2. The CNC high-precision automatic bending machine for manufacturing oilfield equipment parts according to claim 1, characterized in that: The bending upper die (2) and the hydraulic drive cylinder (4) are connected by two parallel sliding guide rails (24). The sliding guide rails (24) are vertically fixed to the front side of the equipment frame (22). The hydraulic drive cylinder (4) is connected to the hydraulic control valve (6) and the hydraulic oil tank through the hydraulic pipeline (5). The hydraulic control valve (6) is fixed to the left side of the equipment frame (22) and controlled by the electrical control box (25).
3. The CNC high-precision automatic bending machine for manufacturing oilfield equipment parts according to claim 1, characterized in that: The workpiece feeding guide rail (1) has three sets of guide positioning blocks (8) arranged at equal intervals along the feeding direction on the left side, and a workpiece positioning fixture (7) is fixed on the right side. The workpiece positioning fixture (7) is fixed to the top of the equipment frame (22) by bolts. The upper bending die (2) is symmetrically provided with synchronous clamping components (12) on both sides, and the lower bending die (11) is fixed with an end clamping device (19) on the right side of the end.
4. The CNC high-precision automatic bending machine for manufacturing oilfield equipment parts according to claim 1, characterized in that: The arc-shaped transmission rack (21) is fixed vertically to the rear side of the bending upper die (2). The transmission pinion (20) and the bending drive wheel (3) are coaxially fixed in the bearing seat at the front end of the equipment frame (22). The output shaft of the main drive motor (15) drives the transmission idler wheel (14) to rotate through the transmission belt pulley (16). The transmission idler wheel (14) is connected to the bending drive wheel (3) through the transmission shaft.
5. The CNC high-precision automatic bending machine for manufacturing oilfield equipment parts according to claim 1, characterized in that: The electrical control box (25) is electrically connected to the stroke limit block (18) located below the stroke path of the hydraulic drive cylinder (4) via a cable. A lifting adjustment mechanism (23) is provided at the center of the top of the equipment frame (22). The output end of the lifting adjustment mechanism (23) is connected to the top of the bending upper die (2) and is controlled by the electrical control box (25).
6. The CNC high-precision automatic bending machine for manufacturing oilfield equipment parts according to claim 1, characterized in that: The equipment base (10) has a discharge clamp (26) fixed on the right side of the upper surface and at the discharge end of the bending lower die (11). The discharge clamp (26) is controlled by an independent drive mechanism. The drive mechanism is electrically connected to the electrical control box (25) via a cable. The equipment frame (22) has side guard plates (17) bolted to the front, back and left sides.