A stair handrail bending and forming machine

Abstract

This utility model relates to the field of stair handrail processing technology, and in particular to a stair handrail bending and forming machine. This utility model provides a stair handrail bending and forming machine, including a base, a conveying assembly, a second motor, a movable wheel, a rotating frame, a first electric push rod, a pushing block, a fixing block, a positioning assembly, and a clamping assembly. The conveying assembly is located on the top left side of the base, and the second motor is installed on the top right side of the base. The movable wheel is connected to the top of the output shaft of the second motor. The first motor in the conveying assembly drives the rotating wheel to rotate, achieving automatic conveying of the pipe fittings and reducing manual operation. The newly added second electric push rod and the positioning plate constitute an adjustable positioning mechanism, which can accurately set the position of the pipe fittings. Furthermore, no repeated manual adjustments are needed for processing in the same batch, ensuring precise alignment between the part of the pipe fitting to be bent and the movable wheel and pushing block, improving positioning efficiency and processing consistency.

Description

Technical Field

[0001] This utility model relates to the field of stair handrail processing technology, and in particular to a stair handrail bending and forming machine. Background Technology

[0002] In the field of architectural decoration, stair railings are an important component for ensuring personnel safety, and their processing quality directly affects the safety and aesthetics of buildings. In the production process of stair railings, pipe bending is one of the key steps, requiring high precision, efficiency, and stability from the forming equipment.

[0003] In existing technologies, most stair handrail bending equipment has significant defects in pipe positioning. Some equipment uses a fixed positioning structure, and the bending conveyor position cannot be flexibly adjusted according to the bending requirements of different pipe specifications. This results in the need to frequently disassemble and replace positioning components when processing different specifications of pipes in the same batch. This is not only cumbersome to operate, but also prone to installation errors, greatly reducing production efficiency.

[0004] Some equipment, while possessing a degree of adjustability, still relies on manual adjustment of the positioning device. Operators must manually adjust the position of the positioning components according to the pipe dimensions and bending requirements, which is not only labor-intensive but also makes it difficult to guarantee the accuracy and consistency of positioning each time due to the uncertainty of human operation. Utility Model Content

[0005] To overcome the aforementioned drawbacks, this utility model provides a stair handrail bending and forming machine.

[0006] The technical solution of this utility model is: a stair handrail bending and forming machine, comprising a base, a conveying assembly, a second motor, a movable wheel, a rotating frame, a first electric push rod, a pushing block, a fixing block, a positioning assembly, and a clamping assembly. The conveying assembly is provided on the top left side of the base, and the second motor is installed on the top right side of the base. The top of the output shaft of the second motor is connected to the movable wheel, and the upper end is connected to the rotating frame. The first electric push rod is installed on the top rear side of the rotating frame. The first electric push rod has a pushing block connected to its telescopic rod, and the bottom of the pushing block is connected to the fixing block. The fixing block is slidably connected to the rotating frame, and the pushing block is aligned with the movable wheel. A clamping assembly is provided in the middle of the top of the base, and a positioning assembly is provided on the top of the pushing block.

[0007] Optionally, the conveying assembly includes a support base, a first motor, and a rotating wheel. The support base is connected to the top left side of the base, and a conveying track is connected to the top of the support base. The first motor is symmetrically installed on the front side of the top of the support base. The output shaft of the first motor passes through the inside of the conveying track and is connected to the rotating wheel. A groove is provided in the conveying track at the position corresponding to the rotating wheel, and the rotating wheel is partially exposed in the groove.

[0008] Optionally, the clamping assembly includes a connecting frame, a first clamping block, a second clamping block, a fixed seat, a spring, a first piston rod, a double cylinder, and a second piston rod. A fixed seat is connected to the top center of the base. The first clamping block is slidably connected to the rear side of the fixed seat. A spring is connected between the first clamping block and the inner side of the fixed seat. A connecting frame is connected to the rear side wall of the first clamping block. The connecting frame abuts against the rear side wall of the fixed block, so that the spring is in a stretched state. A second clamping block is slidably connected to the top front side of the fixed seat and is arranged opposite to the first clamping block. A double cylinder is connected to the front side of the fixed seat. Liquid is stored in the double cylinder. A first piston rod is slidably connected to the lower cylinder of the double cylinder and is connected to the first clamping block. A second piston rod is slidably connected to the upper cylinder of the double cylinder and is connected to the second clamping block.

[0009] Optionally, the spring is made of chrome vanadium steel.

[0010] Optionally, the inner sides of the first clamping block and the second clamping block, as well as the front side of the pushing block, are provided with semi-circular grooves, the shape of which is adapted to the outer wall of the tube. An annular groove is provided in the middle of the movable wheel, which also fits the outer wall of the tube.

[0011] Optionally, the positioning assembly includes a second electric push rod and a positioning plate, with the second electric push rod mounted on the top of the push block and the positioning plate connected to the telescopic rod of the second electric push rod.

[0012] The present invention has the following advantages: 1. The first motor in the conveying assembly drives the rotating wheel to rotate, thereby realizing the automatic conveying of the pipe fittings and reducing manual operation; the newly added second electric push rod and the positioning plate constitute an adjustable positioning mechanism, which can accurately set the position of the pipe fittings, and there is no need to manually adjust repeatedly in the same batch of processing, ensuring that the part of the pipe fitting to be bent is accurately aligned with the movable wheel and the push block, thereby improving positioning efficiency and processing consistency.

[0013] 2. The clamping assembly utilizes spring force and double-cylinder hydraulic transmission to achieve synchronous, opposite-direction movement of the first and second clamping blocks, firmly clamping the other end of the pipe fitting. The pushing block and the movable wheel cooperate to form a ring-shaped pre-clamping structure, with their grooves fitting snugly against the outer wall of the pipe, effectively limiting pipe fitting displacement. During bending, the rotating frame applies bending moment, and the movable wheel rolls to reduce friction, ensuring stable bending of the pipe fitting and improving forming accuracy. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a cross-sectional view of the support base component of this utility model.

[0016] Figure 3 This is a three-dimensional structural diagram of the second motor, movable wheel, and rotating frame of this utility model.

[0017] Figure 4 This is a cross-sectional view of the fixing base and the double-cylinder component of this utility model.

[0018] The markings in the attached diagram are: 1-base, 2-support base, 3-first motor, 4-rotating wheel, 5-second motor, 6-moving wheel, 7-rotating frame, 8-first electric push rod, 9-push block, 10-fixed block, 11-connecting frame, 12-first clamping block, 13-second clamping block, 14-fixed base, 15-spring, 16-first piston rod, 17-double cylinder, 18-second piston rod, 19-second electric push rod, 20-positioning plate. Detailed Implementation

[0019] The embodiments of this utility model will be described below with reference to the accompanying drawings.

[0020] Example: A stair handrail bending and forming machine, such as Figures 1-4 As shown, the device includes a base 1, a conveying assembly, a second motor 5, a movable wheel 6, a rotating frame 7, a first electric push rod 8, a pushing block 9, a fixing block 10, a positioning assembly, and a clamping assembly. The conveying assembly is located on the top left side of the base 1 for automatic conveying of the pipe. The second motor 5 is mounted on the top right side of the base 1 by screws. The top of the output shaft of the second motor 5 is connected to the movable wheel 6, and the upper end is connected to the rotating frame 7, providing a power base for bending the pipe. The first electric push rod 8 is mounted on the top rear side of the rotating frame 7 by screws. The pushing block 9 is connected to the telescopic rod of the first electric push rod 8. The bottom of the pushing block 9 is connected to the fixing block 10. The fixing block 10 is slidably connected to the rotating frame 7. The pushing block 9 is aligned with the movable wheel 6. A clamping assembly is located in the middle of the top of the base 1 for fixing the pipe. A positioning assembly is located on the top of the pushing block 9.

[0021] like Figures 1-2 As shown, the conveying assembly includes a support base 2, a first motor 3, and a rotating wheel 4. The support base 2 is connected to the top left of the base 1, and a conveying track is connected to the top of the support base 2, which provides a guiding path for conveying the pipe. The first motor 3 is symmetrically installed on the top front side of the support base 2 by screws. The output shaft of the first motor 3 passes through the inside of the conveying track and is connected to the rotating wheel 4. A groove is opened in the conveying track at the position corresponding to the rotating wheel 4, and part of the rotating wheel 4 is exposed in the groove. When the pipe to be bent is placed on the conveying track, the first motor 3 is started, and its output shaft drives the rotating wheel 4 to rotate. Through the friction between the rotating wheel and the pipe, the pipe is driven to move to the right, and the pipe is automatically conveyed to the working area. After the pipe is conveyed to the correct position, the first motor 3 is turned off, thus achieving precise conveying of the pipe.

[0022] like Figure 1 , Figure 3 and Figure 4As shown, the clamping assembly includes a connecting frame 11, a first clamping block 12, a second clamping block 13, a fixed base 14, a spring 15, a first piston rod 16, a double cylinder 17, and a second piston rod 18. A fixed base 14 is connected to the top center of the base 1. The first clamping block 12 is slidably connected to the rear side of the fixed base 14. A spring 15 is connected between the first clamping block 12 and the inner side of the fixed base 14. The connecting frame 11 is connected to the rear side wall of the first clamping block 12. The connecting frame 11 abuts against the rear side wall of the fixed block 10, keeping the spring 15 in a stretched state. The spring 15 is made of chromium vanadium steel, possessing high strength, high toughness, and good fatigue resistance, and can withstand large external forces. To maintain stable elastic deformation and prevent permanent deformation, a second clamping block 13 is slidably connected to the front top of the fixed base 14, which is opposite to the first clamping block 12. A double cylinder 17 is connected to the front of the fixed base 14, and liquid is stored inside the double cylinder 17. A first piston rod 16 is slidably connected to the lower cylinder of the double cylinder 17, and the first piston rod 16 is connected to the first clamping block 12. A second piston rod 18 is slidably connected to the upper cylinder of the double cylinder 17, and the second piston rod 18 is connected to the second clamping block 13. Through the cooperation of the double cylinder 17 and the two piston rods, the first clamping block 12 and the second clamping block 13 are synchronously controlled to ensure the clamping effect of the pipe fitting.

[0023] The inner sides of the first clamping block 12 and the second clamping block 13, as well as the front side of the pushing block 9, are all provided with semi-circular grooves. Their shapes are adapted to the outer wall of the tube, which can achieve a good limiting effect and ensure the stability of the tube during bending. The middle part of the movable wheel 6 is provided with an annular groove, which also fits the outer wall of the tube.

[0024] During the pipe bending process, the pipe is conveyed horizontally to the right by the conveying assembly, precisely positioning the part of the pipe to be bent at the center alignment of the movable wheel 6 and the push block 9. The braking mechanism of the conveying assembly is then triggered, stopping the pipe's movement. At this point, the first electric push rod 8 is activated, extending its telescopic rod to move the push block 9 and the fixed block 10 forward. The push block 9 and the movable wheel 6 cooperate to form a ring-shaped constraint structure, using the grooves between them to radially limit and pre-clamp the outer wall of the pipe. After the operation is completed, the first electric push rod 8 is immediately closed. As the fixed block 10 moves forward, it disengages from the connecting frame 11. The tension spring 15 releases its elastic potential energy, generating a reset driving force that moves the first clamping block 12 and the first piston rod 16 forward. The first piston rod 16 performs a piston-like movement within the lower cylinder of the double cylinder 17, squeezing the hydraulic medium inside. This liquid pushes the second piston rod 18 backward within the upper cylinder of the double cylinder 17, thereby driving... The second clamping block 13 moves backward, and through the opposing movement of the first clamping block 12 and the second clamping block 13, bidirectional clamping and fixing of the other end of the tube is achieved, ensuring that the tube remains stable during bending. After the tube is positioned and clamped, the second motor 5 is started, and its output shaft drives the movable wheel 6 and the rotating frame 7 to rotate clockwise. The movable wheel 6 rolls around its own axis, while the rotating frame 7 rotates around the output shaft of the second motor 5, driving the first electric push rod 8, the push block 9 and the fixed block 10 mounted on it to rotate synchronously. During this process, the rotating frame 7 applies a bending moment to the part of the tube to be bent, forcing the tube to undergo plastic deformation. The deformed part fits tightly into the annular groove of the movable wheel 6. Since the other end of the tube has been rigidly fixed by the clamping components, a cantilever beam-type force structure is formed, ensuring that the right end of the tube is accurately bent under the action of bending moment. The rolling characteristics of the movable wheel 6 effectively reduce the sliding friction resistance between it and the tube, improving the stability and forming accuracy of the bending process. After the bending operation is completed, the second motor 5 is controlled to rotate in the reverse direction, driving the movable wheel 6 and the rotating frame 7 to rotate counterclockwise to reset. Then, the first electric push rod 8 is activated again, causing its telescopic rod to retract, which drives the push block 9 and the fixed block 10 to move backward, releasing the clamping constraint on the tube. During the backward movement of the fixed block 10, it pushes the connecting frame 11, causing the first clamping block 12 and the first piston rod 16 to move backward. The tension spring 15 is stretched and stored again. The reverse movement of the first piston rod 16 is transmitted through the hydraulic medium, driving the second piston rod 18 and the second clamping block 13 to reset forward, completely releasing the clamping constraint on the tube. At this time, the operator can safely remove the bent tube, which can then be further processed into a stair handrail product. By repeating the above operation process, continuous automated bending processing of multiple tubes can be achieved.

[0025] like Figure 1As shown, the positioning assembly includes a second electric push rod 19 and a positioning plate 20. The second electric push rod 19 is mounted on the top of the push block 9 by screws, and the positioning plate 20 is connected to the telescopic rod of the second electric push rod 19.

[0026] When the pipe fitting is conveyed horizontally to the right by the conveying assembly to the working area, the end of the pipe fitting will contact the left side of the positioning plate 20. At the same time, the part of the pipe fitting to be bent will make initial contact with the groove on the surface of the movable wheel 6. During the equipment debugging stage, the second electric push rod 19 can be started by the control system. The extension and retraction of its telescopic rod will drive the positioning plate 20 to move horizontally. Specifically, when the telescopic rod is extended, the positioning plate 20 moves to the right; when the telescopic rod is shortened, the positioning plate 20 retracts to the left. Through this adjustment process, the initial position of the positioning plate 20 can be precisely set, ensuring that after the pipe fitting comes into contact with the positioning plate 20, the part to be bent is completely aligned with the working area of ​​the movable wheel 6 and the push block 9, thereby achieving precise positioning of the pipe fitting. When bending the same batch of pipe fittings, since the precise adjustment of the position of the positioning plate 20 has been completed in advance, there is no need to manually adjust the position again after the subsequent pipe fittings are delivered to the position. When the pipe fitting comes into contact with the positioning plate 20, the conveying component automatically triggers the stop mechanism. At this time, the part of the pipe fitting to be bent has accurately fallen into the working area of ​​the movable wheel 6 and the push block 9, and can directly enter the subsequent clamping and bending process.

Claims

1. A stair handrail bending and forming machine, characterized in that: It includes a base (1), a conveying assembly, a second motor (5), a movable wheel (6), a rotating frame (7), a first electric push rod (8), a push block (9), a fixed block (10), a positioning assembly, and a clamping assembly. The conveying assembly is provided on the top left side of the base (1), and the second motor (5) is installed on the top right side of the base (1). The movable wheel (6) is connected to the top of the output shaft of the second motor (5), and the rotating frame (7) is connected to the top. The first electric push rod (8) is installed on the top rear side of the rotating frame (7). The push block (9) is connected to the telescopic rod of the first electric push rod (8), and the fixed block (10) is connected to the bottom of the push block (9). The fixed block (10) is slidably connected to the rotating frame (7). The push block (9) is aligned with the movable wheel (6) front and back. The clamping assembly is provided in the middle of the top of the base (1), and the positioning assembly is provided on the top of the push block (9).

2. The stair handrail bending and forming machine according to claim 1, characterized in that: The conveying assembly includes a support base (2), a first motor (3) and a rotating wheel (4). The support base (2) is connected to the top left side of the base (1). The top of the support base (2) is connected to the conveying track. The first motor (3) is symmetrically installed on the front side of the top of the support base (2). The output shaft of the first motor (3) passes through the inside of the conveying track and is connected to the rotating wheel (4). A groove is provided in the conveying track at the position corresponding to the rotating wheel (4). Part of the rotating wheel (4) is exposed in the groove.

3. A stair handrail bending and forming machine according to claim 2, characterized in that: The clamping assembly includes a connecting frame (11), a first clamping block (12), a second clamping block (13), a fixed seat (14), a spring (15), a first piston rod (16), a double cylinder (17), and a second piston rod (18). The fixed seat (14) is connected to the middle of the top of the base (1). The first clamping block (12) is slidably connected to the rear side of the fixed seat (14). A spring (15) is connected between the first clamping block (12) and the inner side of the fixed seat (14). The connecting frame (11) is connected to the rear side wall of the first clamping block (12). The connecting frame (11) is connected to the rear side wall of the fixed block (10). The side wall abuts, so that the spring (15) is in a stretched state. The top front side of the fixed seat (14) is slidably connected to the second clamping block (13), which is opposite to the first clamping block (12). The front side of the fixed seat (14) is connected to the double cylinder (17), which stores liquid. The lower cylinder of the double cylinder (17) is slidably connected to the first piston rod (16), which is connected to the first clamping block (12). The upper cylinder of the double cylinder (17) is slidably connected to the second piston rod (18), which is connected to the second clamping block (13).

4. A stair handrail bending and forming machine according to claim 3, characterized in that: The spring (15) is made of chromium vanadium steel.

5. A stair handrail bending and forming machine according to claim 4, characterized in that: The inner sides of the first clamping block (12) and the second clamping block (13), as well as the front side of the pushing block (9), are all provided with semi-circular grooves, the shape of which is adapted to the outer wall of the tube. The middle part of the movable wheel (6) is provided with an annular groove, which also fits the outer wall of the tube.

6. A stair handrail bending and forming machine according to claim 5, characterized in that: The positioning assembly includes a second electric push rod (19) and a positioning plate (20). The second electric push rod (19) is mounted on the top of the push block (9), and the positioning plate (20) is connected to the telescopic rod of the second electric push rod (19).

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