A bending device for building material processing

Through the design of adjustable bent wheels and flip plate seats, the problem of fixed trajectory of the pressure wheel in existing equipment is solved, and convenient reverse and bidirectional bending of steel pipes is achieved, which improves the convenience of use and operation efficiency of the equipment.

CN119747456BActive Publication Date: 2025-08-01DEZHOU LIANCHENG NEW BUILDING MATERIALS CO LTD
View PDF 3 Cites 0 Cited by

Patent Information

Application Number
CN202510258322.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-03-06
Publication Date
2025-08-01
Estimated Expiration
2045-03-06

AI Technical Summary

Technical Problem

In existing building materials bending equipment, the press wheels have a fixed trajectory, and the pipes need to be disassembled and assembled in reverse bending, which makes the use of poor convenience.

Method used

The adjustable bending wheel structure is adopted, and the interchange of the bending wheels is achieved through the gear driving the slant of the coupling plate. Combined with the flip plate seat and magnetic positioning, the reverse bending and bidirectional bending of the steel pipe is achieved, and the hard friction is avoided by the rollers.

Benefits of technology

The reverse bending of steel pipes is achieved without redisassembly and assembly, which improves operating efficiency and convenience, reduces the risk of equipment damage, and ensures bending accuracy and safety.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN119747456B_ABST
    Figure CN119747456B_ABST
Patent Text Reader

Abstract

The present invention relates to the technical field of bending of building materials, and specifically relates to a bending device for processing building materials, including a processing table, and two pushing rollers are rotatably arranged on the top of the processing table. For this kind of bending device for processing building materials, the gear connecting plate swings with one end as the center of the circle, so that one of the bending wheels serves as a fixed wheel to limit the steel pipe, and the other bending wheel serves as a moving wheel to bend the steel pipe. After controlling the motor to reverse, the motor will slide along the slide rail to the other end, and the functions of the two bending wheels are interchanged. At this time, the bending directions of the steel pipes are opposite. Compared with the existing non-adjustable bending structure, the above-mentioned connecting plate can switch the functions of the two bending wheels according to different deflection points of itself, so as to quickly realize the reverse bending of the steel pipe without re-inverting the steel pipe, and the deflection point of the connecting plate is quickly controlled by the forward and reverse rotation of the motor, with good use convenience and improved operation efficiency.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The present invention relates to the technical field of bending of building materials, and specifically relates to a bending device for processing building materials. Background Technique

[0002] Building pipes refer to the general term for materials used to transport fluids and carry solid wire rods in buildings. They are an essential part of building projects, especially playing a crucial role in mechanical and electrical installation and building pipeline systems.

[0003] Bending of building pipes means bending metal pipes during building construction or pipe processing to meet specific requirements of building design or the routing needs of pipelines. Bending processing is usually used in various pipeline systems, such as water supply and drainage systems, heating, ventilation and air conditioning systems, fire protection systems, etc., to meet the layout and installation requirements of pipelines inside buildings.

[0004] The existing patent (Publication No.: CN118218448B) discloses a material bending device for building construction, including a processing table assembly and a bending compensation mechanism. The processing table assembly includes a processing table frame, an outer support frame, and a bending turntable. Among them, the outer support frame is fixedly connected to the middle of one side of the processing table frame, the bending turntable is rotatably connected to the upper surface of the processing table frame, and the bending compensation mechanism is installed on one side of the upper surface of the bending turntable. In the above existing technology, the running track of the pressing wheel for bending steel pipes is fixed, and the pipe needs to be disassembled and reinstalled again when bending in the reverse direction, resulting in poor usability.

[0005] In view of this, we propose a bending device for processing building materials. Summary of the Invention

[0006] The purpose of the present invention is to provide a bending device for processing building materials to solve the problem in the above background technique that in the existing technology, the running track of the pressing wheel for bending steel pipes is fixed, and the pipe needs to be disassembled and reinstalled again when bending in the reverse direction, resulting in poor usability. To achieve the above purpose, the present invention provides the following technical solution: A bending device for processing building materials, including a processing table, two pushing rollers are rotatably arranged on the top of the processing table, and a limiting sleeve cooperating with the pushing rollers is fixedly arranged on the processing table, and a two-way bender cooperating with the limiting sleeve is arranged on the processing table.

[0007] The two-way bender includes a plate seat arranged in the middle of the processing table, and the bottom of the plate seat is fixedly connected with a slide rail through two connecting frames. A motor seat is slidably connected in the slide rail, and a motor is fixedly installed in the motor seat, and a gear is fixedly arranged on the rotating shaft of the motor.

[0008] Two arc grooves are formed in the plate seat, and the two arc grooves are arranged staggeredly. Slide seats are slidably connected inside the two arc grooves, and a connecting plate is fixedly connected to the bottoms of the two slide seats. A groove corresponding to the gear is formed in the bottom of the connecting plate, and a tooth surface meshing with the gear is formed on one inner side wall of the groove. Claw teeth for locking the gear are formed at both ends of the groove.

[0009] Bending wheels that cooperate with each other are rotatably connected to the tops of the two slide seats.

[0010] A bending and reversing assembly is arranged on the processing table.

[0011] Preferably, the bending and reversing assembly includes a concave shell arranged along the middle of the processing table. The plate seat is located inside the concave shell, and a rotating ring is fixedly connected to the plate seat. The plate seat is rotatably connected along the limiting sleeve through the rotating ring.

[0012] A pipe rack is fixedly arranged at the bottom of the concave shell, and a rotating shaft is rotatably connected inside the pipe rack. Two insertion blocks are fixedly connected to the side surface of the rotating shaft, and the two insertion blocks are symmetrically distributed along the rotating shaft.

[0013] Insertion slots for inserting the insertion blocks are formed at the bottom of the concave shell.

[0014] Magnetic attraction seats that cooperate with each other are fixedly arranged on the surface of the insertion block and the side edge of the plate seat.

[0015] A gap filling assembly is arranged on the bending wheel.

[0016] Preferably, the gap filling assembly includes a circular groove formed at the top of the bending wheel, and a pressing plate with a conical structure is screwed in the circular groove. A plurality of sliding grooves are annularly formed on the inner side wall of the circular groove, and push rods for cooperating with the pressing plate are slidably connected in the sliding grooves.

[0017] A plurality of vertical grooves respectively communicating with the sliding grooves are formed on the wheel surface of the bending wheel, and vertical shafts are arranged in the vertical grooves. The bottom end of the vertical shaft is rotatably connected along the vertical groove, and the top end of the vertical shaft cooperates with the push rod.

[0018] A roller is rotatably connected to the surface of the vertical shaft.

[0019] Preferably, two triangular strips cooperating with the motor base are slidably arranged at the inner bottom of the slide rail, and springs are arranged at the bottoms of the triangular strips.

[0020] Preferably, two handles are fixedly arranged on the plate seat.

[0021] Preferably, the insertion block, the plate seat and the corresponding magnetic attraction seats are all installed through bolts.

[0022] Preferably, convex ribs are fixedly arranged on the top of the pressing plate.

[0023] Advantages of the present invention compared with the prior art:

[0024] In the present invention, the connecting plate is driven by a gear to rotate, and the connecting plate swings with one end as the center of the circle, so that one bending wheel serves as a fixed wheel to limit the steel pipe, and the other bending wheel serves as a moving wheel to bend the steel pipe. After controlling the motor to reverse, the motor will slide along the slide rail to the other end, and the functions of the two bending wheels are interchanged. At this time, the bending direction of the steel pipe is opposite to the previous one. Compared with the existing non-adjustable bending structure, the above-mentioned connecting plate can switch the functions of the two bending wheels according to different deflection points of itself, so as to quickly reverse-bend the steel pipe without reinstalling the steel pipe. Moreover, the deflection point of the connecting plate is quickly controlled by the forward and reverse rotation of the motor, which has good usability and improves the operation efficiency.

[0025] In the present invention, by pushing the plate seat to flip 90° along the limit sleeve and the concave shell, at this time the plate seat changes from horizontal to vertical, so that the bending directions of the two adjustable bending wheels are switched from horizontal left and right to vertical up and down. When the machine stops, the plate seat can also be flipped to turn the bending area into the concave shell. Compared with the existing bending equipment with a fixed structure, the above-mentioned flip-type plate seat can perform vertical double-sided bending on the steel pipe in cooperation with the adjustable bending wheels without reinstalling and disassembling the steel pipe, which greatly improves the convenience of the bending operation. When transporting the equipment, placing the bending area in the lower concave shell can, on the one hand, avoid damage caused by external collision, and on the other hand, reduce the center of gravity of the equipment.

[0026] In the present invention, by the rotation pressure plate moving downwards and squeezing the push rod to slide out along the chute, the push rod pushes the vertical shaft and the roller to move and fit against the steel pipe. Compared with the existing steel pipe pressing wheel with a wheel surface structure, the above-mentioned roller can move within the wheel surface and adaptively fit different steel pipes. On the one hand, it ensures effective contact between the bending wheel and the steel pipe and avoids deviation of the bending amount caused by gaps. On the other hand, when the pipe surface in the bending area of the steel pipe is stretched or shrunk, the roller can roll cooperatively for continuous bearing, avoiding hard friction of the pipe surface along the fixed wheel surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a three-dimensional structure schematic diagram of the present invention;

[0028] Figure 2 is a structure schematic diagram of the processing table and the plate seat of the present invention;

[0029] Figure 3 is a three-dimensional structure sectional view of the processing table of the present invention;

[0030] Figure 4 is an exploded view of the pipe rack and the rotating shaft of the present invention;

[0031] Figure 5For the present invention Figure 4 The enlarged view of part A in the present invention;

[0032] Figure 6 The structural schematic diagram of the plate seat and the bending wheel of the present invention;

[0033] Figure 7 The bottom view of the plate seat and the slide rail of the present invention;

[0034] Figure 8 The exploded view of the slide rail, the motor seat, the motor and the connecting plate of the present invention;

[0035] Figure 9 The structural schematic diagram of the groove and the tooth surface of the present invention;

[0036] Figure 10 The exploded view of the plate seat and the bending wheel of the present invention;

[0037] Figure 11 The three-dimensional structural sectional view of the bending wheel of the present invention.

[0038] In the figure: 1. Processing table; 2. Pushing roller; 3. Limit sleeve; 4. Double-way bender; 41. Plate seat; 42. Connecting frame; 43. Slide rail; 44. Motor seat; 45. Motor; 46. Gear; 47. Arc groove; 48. Slide seat; 49. Connecting plate; 410. Groove; 411. Tooth surface; 412. Locking tooth; 413. Bending wheel; 414. Bending reversing assembly; 4141. Concave shell; 4142. Rotating ring; 4143. Pipe rack; 4144. Rotating shaft; 4145. Insert block; 4146. Insert slot; 4147. Magnetic attraction seat; 4148. Gap filling assembly; 41481. Circular groove; 41482. Pressing disc; 41483. Chute; 41484. Push rod; 41485. Vertical groove; 41486. Vertical shaft; 41487. Roller. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] Please refer to Figures 1 to 11, the present invention provides a technical solution: a bending device for processing building materials, including a processing table 1, two pushing rollers 2 are rotatably arranged on the top of the processing table 1, and a limiting sleeve 3 cooperating with the pushing rollers 2 is fixedly arranged on the processing table 1. A two-way bender 4 cooperating with the limiting sleeve 3 is arranged on the processing table 1. The steel pipe to be bent is pushed through the pushing rollers 2, passes through the limiting sleeve 3 and then enters the two-way bender 4 for bending.

[0041] The two-way bender 4 includes a plate seat 41 arranged in the middle of the processing table 1, and a slide rail 43 is fixedly connected to the bottom of the plate seat 41 through two connecting frames 42. A motor seat 44 is slidably connected in the slide rail 43, and a motor 45 is fixedly installed in the motor seat 44. A gear 46 is fixedly arranged on the rotating shaft of the motor 45.

[0042] Two arc grooves 47 are opened on the plate seat 41, and the two arc grooves 47 are arranged in a staggered manner. Slide seats 48 are slidably connected inside the two arc grooves 47, and a connecting plate 49 is fixedly connected to the bottom of the two slide seats 48. A groove 410 corresponding to the gear 46 is opened at the bottom of the connecting plate 49, and a tooth surface 411 meshing with the gear 46 is opened on one inner side wall of the groove 410. When the motor 45 is started to drive the gear 46 to rotate forward, during this process, the gear 46 first pushes itself and the motor seat 44 to move horizontally to the bottom in the slide rail 43 along the tooth surface 411 in the reverse direction, and then the motor 45 drives the connecting plate 49 to rotate by using the gear 46, and the connecting plate 49 swings with one end as the center of the circle, so that one bending wheel 413 serves as a fixed wheel to limit the steel pipe, and the other bending wheel 413 serves as a moving wheel to bend the steel pipe. After controlling the motor 45 to reverse, the motor 45 will slide to the other end along the slide rail 43, and the functions of the two bending wheels 413 are interchanged. At this time, the bending direction of the steel pipe is opposite to that described above. Clutch teeth 412 for locking the gear 46 are opened at both ends of the groove 410. After the motor 45 moves to the bottom along the slide rail 43, the gear 46 is engaged with the clutch teeth 412 for locking, so as to lock the gear 46 and the connecting plate 49 together.

[0043] Bending wheels 413 that cooperate with each other are rotatably connected to the tops of the two slide seats 48. The steel pipe can be bent after passing through between the two bending wheels 413.

[0044] A bending reversing assembly 414 is arranged on the processing table 1.

[0045] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 11As shown, the bending reversing assembly 414 includes a concave shell 4141 arranged along the middle of the processing table 1, the plate seat 41 is located in the concave shell 4141, and a rotating ring 4142 is fixedly connected to the plate seat 41, and the plate seat 41 is rotatably connected along the limiting sleeve 3 through the rotating ring 4142. A limiting member for fixing the plate seat 41 is provided on the processing table 1 to ensure stability during lateral bending, and push the plate seat 41 to flip 90° along the limiting sleeve 3 and the concave shell 4141. At this time, the plate seat 41 is turned from horizontal to vertical, so that the bending direction of the two adjustable bending wheels 413 is switched from left and right horizontal to up and down vertical. When the machine is stopped, the plate seat 41 can also be flipped to turn the bending area into the concave shell 4141.

[0046] A pipe rack 4143 is fixedly provided at the bottom of the concave shell 4141 , and a rotating shaft 4144 is rotatably connected inside the pipe rack 4143 . Two plug-in blocks 4145 are fixedly connected to the side surface of the rotating shaft 4144 , and the two plug-in blocks 4145 are symmetrically distributed along the rotating shaft 4144 .

[0047] A slot 4146 for the inserting block 4145 to be inserted into is defined at the bottom of the concave housing 4141 .

[0048] Magnetic seats 4147 that cooperate with each other are fixedly provided on the surface of the plug block 4145 and the side of the plate seat 41. During the flipping process of the plate seat 41, the plug blocks 4145 on both sides can be pushed to be alternately inserted into the slots 4146 through the rotating shaft 4144, so that the plate seat 41 can be positioned along the plug block 4145 using the magnetic seats 4147.

[0049] A gap filling assembly 4148 is provided on the bending wheel 413 .

[0050] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figures 5 to 11 As shown, the gap filling assembly 4148 includes a circular groove 41481 opened at the top of the bending wheel 413, and a conical pressure plate 41482 is screwed into the circular groove 41481 through a thread, and a plurality of slide grooves 41483 are opened in a ring shape on the inner side wall of the circular groove 41481, and a push rod 41484 for cooperating with the pressure plate 41482 is slidably connected in the slide groove 41483.

[0051] The wheel surface of the bending wheel 413 is provided with a plurality of vertical grooves 41485 which are respectively connected to the slide groove 41483, and a vertical shaft 41486 is provided in the vertical groove 41485. The bottom end of the vertical shaft 41486 is rotatably connected along the vertical groove 41485, and the top end of the vertical shaft 41486 cooperates with the push rod 41484.

[0052] A roller 41487 is rotatably connected to the surface of the vertical shaft 41486. Before the bending wheel 413 moves to bend the steel pipe, the rotary pressing disc 41482 moves downward and squeezes the push rod 41484 to slide out along the chute 41483, so that the push rod 41484 pushes the vertical shaft 41486 and the roller 41487 to move and fit against the steel pipe.

[0053] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 11 shown, two triangular bars cooperating with the motor base 44 are slidably arranged at the inner bottom of the slide rail 43, and springs are arranged at the bottoms of the triangular bars. The springs push the triangular bars to move upward into the slide rail 43. After the motor 45 is started, it drives the connecting plate 49 to rotate. When the bending wheel 413 contacts the steel pipe to be bent, it causes reverse limit to the connecting plate 49. At this time, the motor 45 is affected by the tooth surface 411 and drives the motor base 44 to displace to both sides.

[0054] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 11 shown, two handles are fixedly arranged on the plate seat 41. The operator can use the handles to push the plate seat 41 to rotate along the limit sleeve 3, and can also quickly stop the movement of the plate seat 41 along the handles.

[0055] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 11 shown, the plug 4145, the plate seat 41 and the corresponding magnetic seat 4147 are all installed through bolts in the middle. After the bolts are unscrewed, the magnetic seat 4147 can be separated from the plug 4145 or the plate seat 41, so as to facilitate the user to replace the magnetic seat 4147.

[0056] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 11 shown, a convex rib is fixedly arranged on the top of the pressing disc 41482. The operator can use the convex rib to rotate the pressing disc 41482, improving the operation convenience.

[0057] The usage method and advantages of the present invention: When this kind of bending device for building material processing is working and in use, the working process is as follows:

[0058] S1. Push the steel pipe to be bent through the pushing roller 2, pass through the limit sleeve 3 and then enter the double-sided bender 4 for bending.

[0059]

[0059] After the steel pipe passes through between the two bending wheels 413, start the motor 45 to drive the gear 46 to rotate forward. During this process, the gear 46 first pushes itself and the motor base 44 horizontally to the end in the slide rail 43 along the tooth surface 411 in the reverse direction. Then, the motor 45 drives the connecting plate 49 to rotate by using the gear 46, and the connecting plate 49 swings with one end as the center of the circle, so that one of the bending wheels 413 serves as a fixed wheel to limit the steel pipe, and the other bending wheel 413 serves as a moving wheel to bend the steel pipe. After controlling the motor 45 to reverse, the motor 45 will slide to the other end along the slide rail 43, and the functions of the two bending wheels 413 are interchanged. At this time, the bending direction of the steel pipe is opposite to that described above.

[0060] Push the plate seat 41 to flip 90° along the limit sleeve 3 and the concave shell 4141. At this time, the plate seat 41 is changed from a horizontal position to a vertical position, so that the bending directions of the two adjustable bending wheels 413 are switched from left-right horizontal to up-down vertical. During this process, the plug blocks 4145 on both sides can be alternately inserted into the slots 4146 by pushing the rotating shaft 4144, so that the plate seat 41 is positioned along the plug blocks 4145 by using the magnetic seat 4147. When the machine stops, the plate seat 41 can also be flipped to transfer the bending area into the concave shell 4141.

[0061]

[0060] Before the bending wheel 413 moves to bend the steel pipe, the rotating pressure plate 41482 moves downward and squeezes the push rod 41484 to slide out along the chute 41483, so that the push rod 41484 pushes the vertical shaft 41486 and the roller 41487 to move and fit against the steel pipe.

[0062] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A bending device for processing building materials, comprising a processing table (1), characterized in that: There are two push rollers (2) rotatably arranged on the top of the processing table (1), and a limit sleeve (3) matched with the push rollers (2) is fixedly arranged on the processing table (1). A double-bending device (4) matched with the limit sleeve (3) is arranged on the processing table (1); The double-bending device (4) includes a plate seat (41) arranged in the middle of the processing table (1). The bottom of the plate seat (41) is fixedly connected with a slide rail (43) through two connecting frames (42). A motor seat (44) is slidably connected in the slide rail (43), and a motor (45) is fixedly installed in the motor seat (44). A gear (46) is fixedly arranged on the rotating shaft of the motor (45); Two arc grooves (47) are formed in the plate seat (41), and the two arc grooves (47) are arranged staggeredly. Slide seats (48) are slidably connected inside the two arc grooves (47). A connecting plate (49) is fixedly connected to the bottoms of the two slide seats (48). A groove (410) corresponding to the gear (46) is formed in the bottom of the connecting plate (49). A tooth surface (411) meshing with the gear (46) is formed on one inner side wall of the groove (410). Claw teeth (412) for locking the gear (46) are formed at both ends of the groove (410); Bending wheels (413) that cooperate with each other are rotatably connected to the tops of the two slide seats (48); A bending reversing assembly (414) is arranged on the processing table (1).

2. The bending device for processing building materials according to claim 1, wherein: The bending reversing assembly (414) includes a concave shell (4141) arranged along the middle of the processing table (1). The plate seat (41) is located inside the concave shell (4141), and a rotating ring (4142) is fixedly connected to the plate seat (41). The plate seat (41) is rotatably connected along the limit sleeve (3) through the rotating ring (4142); A pipe rack (4143) is fixedly arranged at the bottom of the concave shell (4141). A rotating shaft (4144) is rotatably connected inside the pipe rack (4143). Two insertion blocks (4145) are fixedly connected to the side surface of the rotating shaft (4144), and the two insertion blocks (4145) are symmetrically distributed along the rotating shaft (4144); A slot (4146) for inserting the insertion block (4145) is formed in the bottom of the concave shell (4141); Magnetic attraction seats (4147) that cooperate with each other are fixedly arranged on the surface of the insertion block (4145) and on the side edge of the plate seat (41); A gap filling assembly (4148) is arranged on the bending wheel (413).

3. The bending device for processing building materials according to claim 2, wherein: The gap filling assembly (4148) includes a circular groove (41481) formed in the top of the bending wheel (413). A pressing disc (41482) with a conical structure is screwed in the circular groove (41481). A plurality of sliding grooves (41483) are annularly formed in the inner side wall of the circular groove (41481). Push rods (41484) for cooperating with the pressing disc (41482) are slidably connected in the sliding grooves (41483); A plurality of vertical grooves (41485) communicating with the sliding grooves (41483) respectively are formed on the wheel surface of the bending wheel (413), and a vertical shaft (41486) is arranged in the vertical groove (41485). The bottom end of the vertical shaft (41486) is rotatably connected along the vertical groove (41485), and the top end of the vertical shaft (41486) is matched with the push rod (41484); A roller (41487) is rotatably connected to the surface of the vertical shaft (41486).

4. The bending device for processing building materials according to claim 1, wherein: Two triangular bars matched with the motor base (44) are slidably arranged at the inner bottom of the sliding rail (43), and springs are arranged at the bottoms of the triangular bars.

5. The bending device for processing building materials according to claim 2, characterized in that: Two handles are fixedly arranged on the plate base (41).

6. The bending device for processing building materials according to claim 2, characterized in that: The plug (4145), the plate base (41) and the corresponding magnetic attraction seat (4147) are all installed through bolts.

7. The bending device for building material processing according to claim 3, characterized in that: A convex rib is fixedly arranged at the top of the pressure plate (41482).

Citation Information

Patent Citations

  • Material bending device for building construction

    CN118218448B

  • Double-face circle bending mechanism and double-face circle bending machine

    CN114951372A

  • Electronic steel pipe bidirectionally curved device

    CN205613886U