A metal pipe bending apparatus
By using a two-way force-applying structure that links hydraulic cylinders and pneumatic cylinders, the problem of fixed molds in traditional metal pipe bending equipment is solved, enabling multi-point support and flexible angle control, improving the adaptability and production efficiency of metal pipe bending, and protecting the surface quality of the pipe.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEFEI QIYUN HYDRAULIC PARTS CO LTD
- Filing Date
- 2025-06-26
- Publication Date
- 2026-07-21
AI Technical Summary
The fixed molds in traditional metal pipe bending equipment result in poor adaptability between bending angle and pipe diameter, requiring frequent mold changes, which is time-consuming, labor-intensive, and costly. Furthermore, unidirectional pressure can easily cause local stress concentration in the metal pipe, affecting product quality and lifespan.
The system employs a hydraulic cylinder to link the sliding block and the slide rail, combined with a cylinder push block and a movable head, to form a two-way force application. Through the cooperation of the sliding sleeve, the sliding rod, and the balance frame, it achieves multi-point support and flexible control of the bending angle, avoiding stress concentration at a single point.
It enables flexible and adaptable bending of metal tubes of different specifications, simplifies the operation process, improves production efficiency, protects the surface of the tubes from damage, and enhances processing quality and flexibility.
Smart Images
Figure CN224525696U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of metal tube bending technology, and in particular to a metal tube bending device. Background Technology
[0002] In the metal processing industry, metal tube bending is a key process in manufacturing tubular structures (such as automotive exhaust pipes, building supports, and furniture frames). Traditional metal tube bending equipment mostly uses a single mechanical lever or hydraulic drive to bend the metal tube through a fixed die. This type of equipment has significant limitations: on the one hand, the fixed die leads to poor adaptability between the bending angle and the tube diameter, requiring frequent die changes when changing to different specifications of tubes, which is time-consuming, labor-intensive, and costly; on the other hand, the unidirectional pressure method easily causes local stress concentration in the metal tube, resulting in scratches, wrinkles, or even cracks on the tube surface, affecting product quality and service life.
[0003] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Utility Model Content
[0004] To address the problems of traditional metal pipe bending equipment that mostly uses a single mechanical lever or hydraulic drive to bend metal pipes through a fixed mold, resulting in poor adaptability of the bending angle to the pipe diameter and the need to frequently change the mold when changing to different specifications of pipe fittings, which is time-consuming, labor-intensive, and costly, this application provides a metal pipe bending device.
[0005] The metal tube bending device provided in this application adopts the following technical solution:
[0006] A metal tube bending device includes a base, a fixed frame mounted on the base, a hydraulic cylinder mounted on the fixed frame, a sliding block connected to the output end of the hydraulic cylinder, a bending frame fixed to the outer wall of the sliding block, a bending head mounted in the middle of the outer wall of the bending frame, a stop at the bottom of the bending frame, a bending support block mounted at the top of the stop, and a bending mechanism on the stop, the bending mechanism including a push block and a movable head.
[0007] Preferably, the front end of the fixing frame has symmetrically distributed sliding rods for support, and the side walls of the bending frame are symmetrically fixed with sliding sleeves that are adapted to slide with the sliding rods.
[0008] Preferably, the inner wall of the fixing frame is provided with a slide rail, and the back wall of the sliding block is fixed with a guide block that is adapted to slide along the slide rail by screws.
[0009] Preferably, a cylinder is installed on the edge of the top of the base, and a connector is fixed to the output end of the cylinder, which is rotatably connected to one end of the push block.
[0010] Preferably, the push block has symmetrically rotating movable heads on both sides, and the bottom ends of the two movable heads are welded with fixing parts. One of the fixing parts is fixed to the surface screw of the base, and the other fixing part is fixed to the bottom wall screw of the abutment.
[0011] Preferably, the two sides of the abutment are symmetrically welded with a balance frame for support, and the outer wall of the abutment is symmetrically fixed with a sliding shaft that is adapted to slide with the balance frame.
[0012] In summary, this application includes the following beneficial technical effects:
[0013] This application utilizes a hydraulic cylinder to link a sliding block, guide block, and slide rail, ensuring the bending head is pressed vertically downwards without deviation. A pneumatic cylinder, through a connector, push block, and movable head, drives the bending support block upwards, creating a bidirectional force with the bending head and flexibly controlling the bending angle. The cooperation between the sliding sleeve and sliding rod, and the balance frame and sliding shaft, ensures stable equipment operation and prevents deformation or surface damage to the metal pipe due to uneven stress. This bidirectional linkage and multi-point support structure is not only suitable for metal pipes of different specifications but also simplifies the operation process, improves production efficiency, and provides a reliable guarantee for metal pipe bending processing. Attached Figure Description
[0014] Figure 1 This is a front view of a metal tube bending device according to an embodiment of the application.
[0015] Figure 2 This is a schematic diagram of the structure of a metal tube bending device according to an embodiment of the application.
[0016] Figure 3 This is a structural schematic diagram of the bending mechanism in the embodiment of the application.
[0017] Explanation of reference numerals in the attached drawings: 1. Base; 2. Fixing frame; 3. Hydraulic cylinder; 4. Slide rod; 5. Pneumatic cylinder; 6. Sliding block; 7. Bending frame; 8. Sliding sleeve; 9. Bending head; 10. Slide rail; 11. Balancing frame; 12. Connecting head; 13. Push block; 14. Fixing component; 15. Moving head; 16. Abutment; 17. Bending support block. Detailed Implementation
[0018] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.
[0019] This application discloses a metal tube bending device. (Refer to...) Figures 1-2The system includes a base 1, a mounting bracket 2, and a hydraulic cylinder 3. The output end of the hydraulic cylinder 3 is connected to a sliding block 6. A slide rail 10 is formed on the inner wall of the mounting bracket 2. A guide block, which slides along the slide rail 10, is fixed to the back wall of the sliding block 6 by screws. When the hydraulic cylinder 3 pushes the sliding block 6 along the slide rail 10, the cooperation between the guide block and the slide rail 10 provides rigid guidance for the sliding block 6. A bending frame 7 is fixed to the outer wall of the sliding block 6. A bending head 9 is installed in the middle of the outer wall of the bending frame 7. Supporting sliding rods 4 are symmetrically distributed on both sides of the front end of the mounting bracket 2. Sliding sleeves 8, which slide along the sliding rods 4, are symmetrically fixed to the side walls of the bending frame 7. The bending frame 7 slides on the sliding rods 4 via the sliding sleeves 8, ensuring uniform force distribution during the downward pressing of the bending head 9 and avoiding stress concentration at a single point that could cause deformation or cracking of the metal pipe.
[0020] In this application, the bottom of the bending frame 7 is provided with a support seat 16, and a bending support block 17 is installed at the top of the support seat 16. A bending mechanism is provided on the support seat 16, which includes a push block 13 and a movable head 15. A cylinder 5 is installed on the edge of the top of the base 1, and a connector 12 is fixed to the output end of the cylinder 5. The connector 12 is rotatably connected to one end of the push block 13. After the bending head 9 contacts the metal pipe, the cylinder 5 drives the push block 13 to move accordingly through the connector 12. The relative movement between the bending support block 17 and the bending head 9 forms a progressive bending, reducing the hard impact on the surface of the metal pipe and protecting the appearance and internal structure of the pipe from damage.
[0021] like Figure 3 As shown, the push block 13 has symmetrically rotating movable heads 15 on both sides. Each movable head 15 has a fixed component 14 welded to its bottom end. One fixed component 14 is fixed to the surface of the base 1 with screws, and the other fixed component 14 is fixed to the bottom wall of the abutment 16 with screws. The abutment 16 has symmetrically welded balance frames 11 on both sides for support. The outer wall of the abutment 16 has symmetrically fixed sliding shafts that slide to match the balance frames 11. The movable heads 15 rotate around the fixed components 14, causing the abutment 16 to slide vertically along the sliding shafts, thus moving the bending support block 17 upwards. This two-way linkage mechanism of "bending downward pressure + support block upward push" allows for precise control of the bending angle according to process requirements, and is especially suitable for bending operations with complex angles (such as right angles and obtuse angles), improving processing flexibility.
[0022] The implementation principle of a metal tube bending device according to an embodiment of this application is as follows:
[0023] During operation, first place one end of the metal pipe on the bending support block 17 and adjust the position to be bent. Start the hydraulic cylinder 3. The output end of the hydraulic cylinder 3 pushes the sliding block 6 to move vertically along the slide rail 10 on the inner wall of the fixed frame 2. The guide block on the back of the sliding block 6 ensures smooth sliding and avoids deviation. At the same time, the bending frame 7 slides on the slide rod 4 through the sliding sleeve 8 and moves down synchronously with the sliding block 6, so that the bending head 9 gradually approaches the metal pipe.
[0024] When the bending head 9 contacts the metal pipe, the hydraulic cylinder 3 continues to press down, and the bending head 9 applies downward pressure to the metal pipe, causing it to bend initially. At this time, the cylinder 5 is activated, and the output end of the cylinder 5 pushes the push block 13 to move through the connector 12. Under the force, the movable heads 15 on both sides of the push block 13 can gradually rotate to a vertical state. The movable heads 15 use the fixing member 14 fixed to the base 1 as a fulcrum, driving the abutment 16 to slide vertically along the sliding shaft on the balance frame 11, so that the bending support block 17 moves upward synchronously. Under the dual action of the downward pressure of the bending head 9 and the upward support of the bending support block 17, the bending head 9 and the bending support block 17 form a relative movement, and the metal pipe is gradually bent to the required angle.
[0025] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.
[0026] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.
[0027] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
[0028] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A metal tube bending device, comprising a base (1), characterized in that: A fixed frame (2) is installed on the base (1), a hydraulic cylinder (3) is installed on the fixed frame (2), a sliding block (6) is connected to the output end of the hydraulic cylinder (3), a bending frame (7) is fixed on the outer wall of the sliding block (6), a bending head (9) is installed in the middle of the outer wall of the bending frame (7), a support seat (16) is provided at the bottom of the bending frame (7), a bending support block (17) is installed at the top of the support seat (16), a bending mechanism is provided on the support seat (16), and the bending mechanism includes a push block (13) and a movable head (15).
2. The metal tube bending device according to claim 1, characterized in that: The front end of the fixed frame (2) is symmetrically distributed with sliding rods (4) for support, and the side wall of the bending frame (7) is symmetrically fixed with sliding sleeves (8) that are adapted to slide with the sliding rods (4).
3. The metal tube bending device according to claim 1, characterized in that: The inner wall of the fixed frame (2) is provided with a slide (10), and the back wall of the sliding block (6) is fixed with a guide block that is adapted to slide with the slide (10) by screws.
4. The metal tube bending device according to claim 1, characterized in that: A cylinder (5) is installed on the edge of the top of the base (1), and a connector (12) is fixed to the output end of the cylinder (5). The connector (12) is rotatably connected to one end of the push block (13).
5. A metal tube bending device according to claim 1, characterized in that: The push block (13) has movable heads (15) that rotate symmetrically on both sides. The bottom ends of the two movable heads (15) are welded with fixing parts (14). One of the fixing parts (14) is fixed to the surface screw of the base (1), and the other fixing part (14) is fixed to the bottom wall screw of the abutment (16).
6. A metal tube bending device according to claim 5, characterized in that: The abutment (16) is symmetrically welded with a balance frame (11) for support on both sides, and the outer wall of the abutment (16) is symmetrically fixed with a sliding shaft that is adapted to slide with the balance frame (11).