An automatic pipe bending machine for motorcycle frames with curvature detection

Abstract

This utility model discloses an automatic pipe bending machine for motorcycle frames with curvature detection, including a bending machine tool, a bending shaft block, a bushing monitoring assembly, and a photoelectric detection structure. By setting several touch electrode switches on the surface of the bending shaft block, combined with an electrode slip ring and electrode brush structure outside the main shaft, the machine senses the pressure state of the pipe during the bending process. The photoelectric switches and grating wheel are used to detect the main shaft deflection angle, and this information, along with the electrode signals, is fed back to the information processing module to dynamically determine the deviation between the actual bending curvature and the set angle, thereby achieving automatic correction control. This structure can significantly improve bending accuracy, adapt to the differences in elastic rebound of different materials, and possesses good processing consistency and automation level.

Description

Technical Field

[0001] This utility model relates to the field of pipe bending machine technology, specifically to an automatic pipe bending machine for motorcycle frames with arc detection. Background Technology

[0002] Pipe bending machines, as tubing forming equipment, are widely used in motorcycle frames, furniture structures, and metal frame manufacturing. The ability to perform high-precision bending of tubing directly affects the structural strength, assembly accuracy, and appearance consistency of the product. Therefore, effectively detecting and providing feedback on the actual curvature during the bending process has become a key direction for improving the intelligence and product quality control of related equipment.

[0003] In existing technologies, pipe bending equipment primarily relies on two methods to sense the degree of bending: one is to indirectly calculate the bending angle by recording the input angle or number of rotations of the bending spindle (i.e., drive shaft) through a servo system; the other is to estimate the bending radius of the pipe by monitoring the deflection of the drive motor in real time through position sensors such as angle encoders or Hall elements. Both methods are generally based on the ideal assumption that "theoretical input = actual output."

[0004] However, in actual processing, due to the differences in yield properties of metal pipes, wall thickness tolerances, and material elastic recovery, the theoretically set bending angle often deviates from the actual curvature of the final product. Especially in high-speed automated operations or large-scale continuous processing, it is impossible to correct deviations and provide feedback in real time, resulting in inconsistent finished product accuracy and a reduced pass rate.

[0005] In addition, some existing high-end systems attempt to use image recognition or laser measurement to sense the degree of pipe bending, but they have shortcomings such as complex structure, high cost, weak anti-interference ability and high maintenance difficulty, which limit their promotion in application scenarios such as motorcycle frames where both stability and cost control are highly required.

[0006] Therefore, there is an urgent need for a detection solution that is simple in structure, sensitive in response, and can identify the actual bending curvature of pipes in real time, so as to overcome the problem that the existing bending curvature only relies on theoretical deflection angle feedback and cannot detect material springback error, thereby improving the bending accuracy control capability and processing consistency of the system. Utility Model Content

[0007] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0008] Therefore, the technical solution adopted by this utility model is as follows: an automatic pipe bending machine for motorcycle frames with arc detection, including: a bending machine tool, a bending shaft block assembly, a bushing monitoring assembly, and a photoelectric detection structure for angle detection. Through the linkage control and feedback between the components, the dynamic perception and closed-loop adjustment of the difference between the preset bending angle and the actual bending arc are realized.

[0009] The bending machine is equipped with a control panel and a spindle drive structure. The control panel is used to set the expected curvature value and to perform logical control of the spindle drive process. The spindle drive structure includes a geared motor and a spindle rod. The output end of the geared motor is connected to the spindle rod to drive its deflection and rotation. By controlling the spindle deflection angle, the bending angle can be controlled, ensuring the stability of the starting angle and stroke of each bending action.

[0010] In a preferred embodiment, the present invention may be further configured as follows: the bending shaft block is fixedly installed on the outer periphery of the main shaft and rotates synchronously with the deflection of the main shaft; the surface of the bending shaft block is provided with a tube groove, and a plurality of touch electrode switches are embedded in the inner periphery of the tube groove, each electrode switch being a push-button type.

[0011] The specific technical effect is that during the bending process, the degree of springback of the pipe under stress can be sensed by the triggering of different numbers of electrode switches, thereby calculating the actual bending arc of the material.

[0012] In a preferred embodiment, the present invention may be further configured as follows: the bushing monitoring assembly includes a fixed seat sleeved on the outer periphery of the main shaft, the surface of the fixed seat is provided with a fixed lug plate for electrical signal conduction, a plurality of electrode brushes are mounted on the fixed lug plate, and the electrode brushes slide in contact with the surface of the electrode slip ring mounted on the main shaft to establish an electrical connection between the trigger electrode switch and the information processing module.

[0013] The specific technical effect is: to realize the synchronous acquisition of the conduction signal of the touch electrode switch, so that the control panel can obtain the bending feedback signal in the bending state in real time.

[0014] In a preferred embodiment, the present invention may be further configured such that: the photoelectric detection structure includes a photoelectric switch mounted on a fixed base and a grating wheel mounted on a main shaft, wherein the light-receiving surface of the photoelectric switch is vertically aligned with the surface of the grating wheel, and the main shaft deflection angle is sensed by detecting changes in the grating gap.

[0015] The specific technical effect is to compare the preset angle with the real-time angle of the spindle, and to judge the actual bending state by combining the electrode signal, thereby improving the accuracy of feedback control.

[0016] In a preferred embodiment, the present invention can be further configured such that: the information processing module is located inside the control panel, the input end is connected to the photoelectric switch and each electrode brush, and the output end controls the start and stop status of the geared motor, forming a complete automatic closed-loop control system.

[0017] The specific technical effect is that the system can dynamically judge the deviation based on the input curvature command, photoelectric detection results and feedback signal from the touch electrode, and automatically adjust the motor output to achieve adaptive correction for bending states of different materials.

[0018] In a preferred embodiment, the present invention may be further configured as follows: the present invention also includes a linear actuator and a slider disposed on the surface of the machine tool, for conveying the tube to the bending shaft block respectively and clamping it together to ensure that the bending position is accurate and consistent.

[0019] The specific technical effects are as follows: by combining front clamping and pushing, the influence of traditional manual feeding on bending start error is eliminated, and the overall processing consistency of the equipment is improved.

[0020] In a preferred embodiment, the present invention may be further configured such that: the groove provided on the surface of the bent shaft block is a U-shaped structure, including a straight section and an arc-shaped section, and the touch electrode switches are evenly distributed on the inner surface of the arc-shaped section.

[0021] The specific technical effects are as follows: the U-shaped structure helps to stabilize the clamping, and at the same time, it can accurately form an electrode contact feedback path under different bending conditions, effectively covering the range of common bending angles.

[0022] In summary, this utility model, through innovative structural design, establishes a direct logical feedback relationship between bending action execution and curvature perception, which can automatically adapt to the springback characteristics of different materials, effectively improving the forming consistency and curvature accuracy of motorcycle frame tubing, and is suitable for mass production of high-precision bent tubes.

[0023] The beneficial effects achieved by this utility model are as follows: 1. In this utility model, by setting a number of circumferentially distributed trigger electrode switches in the bending shaft block, and combining them with the electrode slip ring and electrode brush structure set in the bushing monitoring assembly, a bending curvature detection system based on physical contact feedback is constructed. This allows the system to sense the actual bending curvature of the pipe by the number of contacts between the pipe and the trigger electrode switches after the pipe is actually bent and formed. This effectively overcomes the problem in the prior art that it can only detect the theoretical deflection angle and cannot sense the actual bending result after the material springs back, thus significantly improving the bending accuracy and quality consistency.

[0024] 2. In this utility model, by setting a grating wheel on the main shaft structure and cooperating with the photoelectric switch on the fixed base to form a three-dimensional photoelectric detection component, the real-time monitoring of the main shaft deflection angle can be realized. This can not only verify the execution of the preset bending angle, but also cooperate with the electrode detection feedback for error compensation and closed-loop control, further enhancing the intelligence, stability and ease of operation of the system, and making it suitable for high-requirement motorcycle frame processing scenarios. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model; Figure 2 This is a schematic diagram of the bushing monitoring component and the installation structure of the bent shaft block according to one embodiment of the present invention; Figure 3 This is a schematic diagram of the bushing monitoring assembly structure according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the photoelectric detection component mounting structure according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the surface structure of a bending shaft block according to an embodiment of the present invention.

[0026] Figure label: 100. Bending machine; 110. Control panel; 120. Gear motor; 130. Spindle; 200. Bending shaft block; 201. Tube groove; 210. Touch electrode switch; 300. Bushing monitoring assembly; 310. Fixing base; 320. Electrode slip ring; 311. Fixed lug plate; 312. Electrode brush; 330. Photoelectric detection component; 331. Photoelectric switch; 332. Grating wheel. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0028] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0029] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing an automatic pipe bending machine for motorcycle frames with curvature detection.

[0030] Combination Figures 1-5As shown, this utility model provides an automatic pipe bending machine for motorcycle frames with curvature detection, including a bending machine tool 100 and a bushing monitoring assembly 300. The bending machine tool 100 has a control panel 110 on its surface for operating and controlling the machine's operation; a reduction motor 120 and a main spindle 130 are also provided on the surface of the bending machine tool 100, the reduction motor 120 driving the main spindle 130 to rotate; a bending block 200 is installed on the outer periphery of the main spindle 130 for clamping and bending the tubing used for the motorcycle frame.

[0031] The bending shaft block 200 is fixedly sleeved on the surface of the main shaft 130 and rotates synchronously with the deflection movement of the main shaft 130, thereby driving the pipe to complete the bending. The surface of the bending shaft block 200 is provided with a pipe groove 201, and several circumferentially arranged trigger electrode switches 210 are evenly embedded inside it. Each trigger electrode switch 210 has a press-type structure and can be triggered into a conductive state when subjected to force.

[0032] The bushing monitoring assembly 300 includes a fixed base 310, an electrode slip ring 320, and a photoelectric detection element 330. The fixed base 310 is sleeved on the outer periphery of the main spindle 130 and fixedly installed on the surface of the bending machine tool 100. A fixed lug plate 311 is installed on the surface of the fixed base 310 to support the photoelectric detection element 330 and the electrode brush 312.

[0033] In this embodiment, the electrode brush 312 is disposed on the surface of the fixed lug plate 311, with its brush contact end facing the center of the main shaft 130. It can slide in contact with each electrode ring on the surface of the electrode slip ring 320 to achieve electrical connection with the trigger electrode switch 210. The electrode slip ring 320 is fixedly disposed on the outer periphery of the main shaft 130, and its surface is provided with multiple electrode rings, each corresponding to a trigger electrode switch 210, to achieve independent transmission of the corresponding on / off signals.

[0034] The photoelectric detection component 330 includes a photoelectric switch 331 mounted on the surface of the fixed ear plate 311 and a grating wheel 332 mounted on the surface of the main shaft 130. The light-receiving surface of the photoelectric switch 331 is vertically aligned with the surface of the grating wheel 332, senses the deflection angle of the main shaft 130 and converts the light signal into an electrical signal, which is then transmitted to the control panel 110 for precise angle determination.

[0035] In this embodiment, the control panel 110 is equipped with an information processing module. Its input terminal is electrically connected to the electrode brush 312 and the photoelectric switch 331, and its output terminal is electrically connected to the geared motor 120. The information processing module can determine the actual bending curvature of the pipe based on the number of contacts of the electrode switch 210 during the bending process. Simultaneously, it combines this with the deflection angle of the spindle 130 fed back by the photoelectric detection element 330 to comprehensively determine the difference between the preset bending curvature and the actual bending curvature, achieving precise feedback and control.

[0036] In practical use, the operator inputs the preset bending radius through the control panel 110. The linear actuator feeds the pipe tangentially to the surface of the bending shaft block 200, where it is clamped by the slider. The reduction motor 120 starts, driving the main shaft 130 to deflect and causing the bending shaft block 200 to bend the pipe. During the bending process, the pipe comes into contact with multiple trigger electrode switches 210 inside the bending shaft block 200. The actual degree of bending after the material recovers is determined based on the number of contacts.

[0037] This invention also uses a photoelectric detection element 330 to detect the actual deflection angle of the main shaft 130, in order to monitor the stress on the pipe and the accuracy of the entire bending stroke. Combining the two measurement methods can effectively avoid the error caused by the material yield difference on the curvature accuracy.

[0038] In this embodiment, the tube groove 201 provided on the surface of the bending shaft block 200 has a U-shaped structure, including a straight section and an arc-shaped section. The touch electrode switches 210 are evenly distributed on the surface of the arc-shaped section and are used to contact the tube in the bent state.

[0039] Working principle and usage process of this utility model: This invention achieves accurate measurement of the actual bending radius of pipes through a dual-sensing method with integrated structure. During the operation of the equipment, the linear actuator tangentially conveys the pipe to be bent to the pipe groove 201 on the surface of the bending shaft block and contacts it, and the slider structure cooperates to achieve clamping; Subsequently, the main spindle 130 and bending block 200 are driven by the geared motor 120 to deflect, thereby realizing the bending process of the pipe. During the bending process, as the pipe gradually deforms, its surface will come into contact with a number of trigger electrode switches 210 arranged circumferentially in the pipe groove 201 in sequence, triggering the corresponding electrical signal, thereby recording the number of contacts corresponding to different curvatures during the bending process in real time. After bending, the bending block 200 returns to its original position. Due to the material springback effect, the tube will elastically recover at a certain angle, and at this time it will still be in contact with some of the trigger electrode switches 210. By counting the number of trigger electrode switches 210 that are pressed in this springback state, the final bending curvature of the material after actual forming can be directly sensed. In addition, to achieve dual sensing, the main spindle 130 is provided with a grating wheel 332, which, together with the photoelectric switch 331 on the fixed ear plate 311, constitutes a photoelectric detection element 330, which is used to detect the deflection angle of the main spindle 130 and the bending shaft block 200 in real time, thereby verifying the execution effect of the pre-input bending arc and realizing the comparison and correction of the theoretical value and the actual value.

[0040] Through the above structural arrangement, it is possible to perceive the actual state of the material after bending and forming, and to monitor the action accuracy of the execution structure in real time, thereby achieving highly reliable and consistent pipe bending processing control.

[0041] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A motorcycle frame automatic pipe bender with camber detection, characterized by: A bending machine (100) and a bushing monitoring assembly (300) are provided. The bending machine (100) is provided with a control panel (110) and a bending shaft block (200) for bending tubes by deflection motion is rotatably mounted on the surface of the bending machine (100). The bending machine (100) is provided with a geared motor (120) and a main spindle (130). The bending shaft block (200) is fixedly sleeved on the surface of the main spindle (130). The geared motor (120) is used to drive the main spindle (130) and the bending shaft block (200) to deflect. The bending shaft block (200) is provided with a tube groove (201) on its surface, and a plurality of circumferentially arranged touch electrode switches (210) are embedded in the inner side of the tube groove (201). The bushing monitoring assembly (300) includes: a fixed seat (310), an electrode slip ring (320), and a photoelectric detection element (330). The fixed seat (310) is fixed to the surface of the bending machine tool (100) and sleeved on the outer periphery of the main spindle (130). A fixed lug plate (311) is fixedly installed on the surface of the fixed seat (310), and a plurality of electrode brushes (312) are provided on the surface of the fixed lug plate (311).

2. The motorcycle frame automatic tube bending machine with arc detection according to claim 1, characterized in that, The surface of the electrode slip ring (320) is provided with a plurality of electrode rings that are electrically connected to each of the trigger electrode switches (210) one by one. The electrode brush (312) makes sliding contact with the electrode rings to realize the electrical connection between each trigger electrode switch (210) and the input end of the control panel (110). The photoelectric detection device (330) includes a photoelectric switch (331) fixed on the surface of the fixed ear plate (311) and a grating wheel (332) fixed on the surface of the main shaft (130). The output end of the photoelectric detection device (330) is electrically connected to the input end of the control panel (110).

3. The motorcycle frame automatic tube bending machine with arc detection according to claim 1, characterized in that, The bending machine tool (100) is provided with a linear actuator for linearly pushing the pipe and for tangentially conveying the pipe to the surface of the bending shaft block (200). The bending machine tool (100) is provided with a slider that can move perpendicularly to the surface of the bending shaft block (200) for synchronously deflecting with the surface of the bending shaft block (200) to bend the pipe.

4. The automatic motorcycle frame bending machine with arc detection according to claim 1, characterized in that, The control panel (110) is equipped with an information processing module, which is electrically connected to each of the trigger electrode switches (210) through the contact of the electrode ring on the surface of the fixed ear plate (311) and the electrode slip ring (320). The bending curvature of the pipe is calculated by the number of the number of trigger electrode switches (210) arranged axially.

5. The automatic motorcycle frame bending machine with arc detection according to claim 1, characterized in that, Several of the aforementioned trigger electrode switches (210) are evenly spaced in a circumferential direction on the surface of the tube groove (201). Each of the aforementioned trigger electrode switches (210) is a trigger switch structure, which sends an electrical signal through the pressed contact state of its surface.

6. The automatic motorcycle frame bending machine with arc detection according to claim 2, characterized in that, The grating wheel (332) is fixedly sleeved on the surface of the main shaft (130) and arranged coaxially with it. The surface of the grating wheel (332) is provided with a number of evenly distributed grids. The light-receiving surface of the photoelectric switch (331) is perpendicular to the surface of the grating wheel (332). The photoelectric switch (331) converts the light signal into an electrical signal and transmits it to the control panel (110).

7. The automatic motorcycle frame bending machine with arc detection according to claim 1, characterized in that, The output terminal of the control panel (110) is electrically connected to the input terminal of the geared motor (120) and is used to control the operation of the geared motor (120) based on the electrical signal feedback from the photoelectric detection device (330).

8. The automatic motorcycle frame bending machine with arc detection according to claim 1, characterized in that, The tube groove (201) on the surface of the bending shaft block (200) is U-shaped, including an arc section and a straight section. The straight section is used to clamp the starting point of the tube bending. The trigger electrode switch (210) is evenly distributed on the surface of the arc section.

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