Positioning system and positioning method suitable for cylindrical workpiece

Abstract

The invention relates to the technical field of workpiece positioning, and discloses a positioning system and a positioning method suitable for a cylindrical workpiece. The system comprises a guide mechanism, a positioning mechanism, a first sensor, a second sensor, a motor and a control unit. The guide mechanism comprises two guide rails, a sliding block and a two-way screw rod which are vertically mounted in a laminated manner; the positioning mechanism is of a parallelogram structure formed by a mounting part and a connecting rod; the sensor is used for monitoring pressure in real time; the motor drives the sliding block to slide. The control unit controls the motor according to sensor feedback. The positioning method comprises the steps of placing the workpiece on the supporting plate, lifting the workpiece, starting the motor, reversely rotating or closing the motor according to the pressure value of the sensor and the like. Through cooperation of the guide mechanism and the positioning mechanism and real-time monitoring feedback of the sensor, accurate positioning and stable operation of the cylindrical workpiece are achieved, and the problems that traditional positioning feedback is insufficient and not intelligent enough are effectively solved.

Description

Technical Field

[0001] This invention relates to the field of workpiece positioning technology, specifically to a positioning system and method suitable for cylindrical workpieces. Background Technology

[0002] In industrial production, positioning cylindrical workpieces is a crucial step in many processing stages. Currently, various devices and systems exist for positioning cylindrical workpieces. However, traditional positioning methods often suffer from low positioning accuracy and poor stability due to their relatively simple design and lack of intelligent control. For example, some positioning devices rely solely on simple mechanical clamps, which struggle to achieve precise fit when dealing with cylindrical workpieces of different sizes, easily leading to positioning deviations. Other positioning systems, while possessing some adjustment capabilities, lack effective feedback mechanisms and cannot monitor key parameters such as pressure changes during the positioning process in real time, thus affecting positioning effectiveness and workpiece processing quality.

[0003] Against this backdrop, it is particularly necessary to develop a system that can accurately and stably position cylindrical workpieces. Therefore, a positioning system and positioning method suitable for cylindrical workpieces are proposed. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a positioning system and method suitable for cylindrical workpieces. It has the advantages of accurate positioning of cylindrical workpieces and intelligent control, and solves the problems of low positioning accuracy, poor stability, difficulty in adapting to workpieces of different sizes, and lack of effective feedback mechanism in traditional cylindrical workpiece positioning methods.

[0006] (II) Technical Solution

[0007] To achieve the aforementioned goal of precise positioning and intelligent control of cylindrical workpieces, the present invention provides the following technical solution:

[0008] In one aspect, the present invention provides a positioning system suitable for cylindrical workpieces, comprising:

[0009] The guiding mechanism includes two guide rails that are perpendicular to each other and stacked. Each of the two guide rails has two sliders that are slidably disposed inside. One of the guide rails is rotatably connected to a bidirectional screw, and the two threads of the bidirectional screw in different directions respectively cooperate with different sliders.

[0010] Positioning mechanism: includes four sets of mounting parts and four connecting rods that are hinged to the mounting parts in sequence, forming a parallelogram structure. The mounting parts are fixed to the lower ends of different sliders.

[0011] Four primary sensors are respectively installed on the inner walls of the four connecting rods;

[0012] Four second sensors: respectively installed on the four sets of mounting parts;

[0013] Motor: Fixed to one side of the bidirectional screw, the motor drives two sliders in the same guide rail to slide towards or away from each other by rotating the bidirectional screw. Under the parallelogram structure of the positioning mechanism, it drives the other two sliders to slide towards or away from each other.

[0014] Control unit: connected to the motor, the first sensor, and the second sensor.

[0015] For precise positioning and control, the control unit is configured to: drive the motor in reverse when any two first sensors detect that the pressure values ​​are equal at the same time; and turn off the motor when any two second sensors detect that the pressure values ​​are equal at the same time.

[0016] For accurate pressure measurement, both the first and second sensors are strain gauge pressure sensors.

[0017] For overload safety protection, the control unit also includes an alarm module, which is preset with a maximum pressure threshold. When the pressure value detected by either the first sensor or the second sensor exceeds the maximum pressure threshold during motor driving, the control unit triggers an alarm and shuts down the motor.

[0018] To ensure smooth and stable operation, the motor is a slow-speed motor.

[0019] To ensure stable placement of the workpiece, a horizontal support plate is provided directly below the positioning mechanism. The support plate is used to place the cylindrical workpiece to be positioned, and the cylindrical workpiece can slide relative to the support plate.

[0020] For adjusting the height of the workpiece, a lifting device is also provided at the bottom of the support plate. The lifting device is electrically connected to the control unit and is used to lift the cylindrical workpiece placed on the support plate.

[0021] In one aspect, the present invention provides a positioning method using a cylindrical workpiece positioning system, comprising the following steps:

[0022] S1: Place the cylindrical workpiece on the horizontal support plate directly below the positioning mechanism, ensuring that the side of the cylindrical workpiece is perpendicular to the support plate when it is placed.

[0023] S2: Lift the cylindrical workpiece so that the inner walls of the four connecting rods of the positioning mechanism do not contact the side of the cylindrical workpiece.

[0024] S3: Start the motor, which drives the four linkages to move under the action of the guide mechanism;

[0025] S4: When any two first sensors located on the symmetrical side detect that the pressure values ​​are equal at a certain instant, the motor rotates in the opposite direction;

[0026] S5: When any two second sensors located on symmetrical sides detect that the pressure values ​​are equal at a certain instant, the motor is turned off to complete the positioning.

[0027] (III) Beneficial Effects

[0028] Compared with the prior art, the present invention provides a positioning system and method suitable for cylindrical workpieces, which has the following advantages:

[0029] This positioning system and method, applicable to cylindrical workpieces, achieves precise positioning and stable operation of cylindrical workpieces through the ingenious cooperation of the guiding mechanism and the positioning mechanism, as well as the real-time monitoring and feedback of the first and second sensors. Simultaneously, the intelligent configuration of the control unit ensures the accuracy and safety of the positioning process, effectively solving the problems of low positioning accuracy and poor stability in traditional positioning methods.

[0030] This positioning system and method, applicable to cylindrical workpieces, further enhances the adaptability and convenience of positioning through the smooth drive of a slow-speed motor, the stable placement of the support plate, and the height adjustment function of the lifting device. Furthermore, the overload safety protection mechanism of the alarm module effectively avoids excessive pressure during the positioning process, ensuring both positioning effectiveness and workpiece processing quality. Attached Figure Description

[0031] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0032] Figure 1 A schematic diagram of a positioning system according to one embodiment is shown;

[0033] Figure 2 A partial schematic diagram of a positioning system according to one embodiment is shown;

[0034] Figure 3 A partial schematic diagram of a positioning system according to another embodiment is shown;

[0035] Figure 4 A schematic diagram of a positioning method according to one embodiment is shown;

[0036] Figure 5 This is a schematic diagram of the positioning system of the present invention.

[0037] In the diagram: 1. Guide mechanism; 11. Guide rail; 12. Slider; 13. Bidirectional screw; 2. Positioning mechanism; 21. Mounting part; 22. Linkage; 3. First sensor; 4. Second sensor; 5. Motor; 6. Control unit; 7. Support plate; 8. Lifting device. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0040] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] Example 1

[0042] Please see Figures 1-5 A positioning system suitable for cylindrical workpieces includes a guide mechanism 1. The guide mechanism 1 includes two guide rails 11 that are perpendicular to each other and stacked. The system also includes a frame (not explicitly shown in the figure, but belonging to a common technical field) for supporting both ends of the two guide rails 11, fixing the two guide rails 11 in place, or directly assembling or welding the two guide rails 11. Each guide rail 11 has two sliding sliders 12 slidably disposed inside it. One guide rail 11 has a bidirectional screw 13 rotatably connected inside it, with two threads in different directions on the bidirectional screw 13 engaging with different sliders 12.

[0043] The positioning mechanism 2 includes four sets of mounting parts 21 and four connecting rods 22 hinged sequentially through the mounting parts 21, forming a parallelogram structure. The mounting parts 21 are fixed to the lower ends of different sliders 12. Four first sensors 3 are located on the inner walls of the four connecting rods 22; four second sensors 4 are located on the four sets of mounting parts 21. A motor 5 is fixedly connected to one side of a bidirectional screw 13, and by rotating the bidirectional screw 13, it drives two sliders 12 within the same guide rail 11 to slide towards or away from each other. Under the action of the parallelogram structure of the positioning mechanism 2, it drives two other sliders 12 to slide towards or away from each other. A control unit 6 is mounted on the top of a guide rail 11 and is connected to the motor 5, the first sensors 3, and the second sensors 4, wherein it is electrically connected to the motor 5 and signal-connected to the first sensors 3 and the second sensors 4.

[0044] It should be noted that both the motor 5 and the control unit 6 of this system are externally connected to a power source.

[0045] In some embodiments, to achieve precise positioning control, the control unit 6 is configured to: reverse-drive the motor 5 when any two first sensors 3 detect equal pressure values ​​at the same time; and shut off the motor 5 when any two second sensors 4 detect equal pressure values ​​at the same time. By real-time monitoring of the pressure values ​​of the first sensors 3 and second sensors 4 by the control unit 6, combined with the driving of the motor 5, precise positioning control of the cylindrical workpiece is achieved. When the pressure values ​​of the first sensors 3 on the symmetrical sides are equal, it indicates that the connecting rod 22 has uniformly contacted the side of the workpiece; at this time, reversing the motor 5 can prevent excessive compression. Simultaneously, when the pressure values ​​of the second sensors 4 on the symmetrical sides are equal, it indicates that the workpiece has been stably clamped; at this time, shutting off the motor 5 can ensure the stability of the positioning.

[0046] In some embodiments, both the first sensor 3 and the second sensor 4 are strain gauge pressure sensors to achieve accurate pressure measurement. Strain gauge pressure sensors are used as the first sensor 3 and the second sensor 4 because their structure is perfectly suited to the system, enabling accurate measurement of pressure changes on the inner wall of the connecting rod 22 and the mounting portion 21, providing reliable feedback signals to the control unit 6, thereby ensuring positioning accuracy.

[0047] In some embodiments, to achieve overload safety protection, the control unit 6 also includes an alarm module with a preset maximum pressure threshold. When the pressure value detected by either the first sensor 3 or the second sensor 4 exceeds the maximum pressure threshold during the driving of the motor 5, the control unit 6 triggers an alarm and shuts down the motor 5. The alarm module and its preset maximum pressure threshold in the control unit 6 are designed to prevent damage to the workpiece or the positioning system due to excessive pressure during the positioning process. When the pressure value detected by any sensor exceeds the threshold, the control unit 6 immediately triggers an alarm and shuts down the motor 5, thereby protecting the safety of the workpiece and the system.

[0048] In some embodiments, a slow-speed motor is selected for motor 5 to achieve smooth and stable operation. Choosing a slow-speed motor as the drive source ensures the smoothness and stability of the positioning process. A slow-speed motor can provide stable torque output, reducing vibration and impact caused by excessive speed, thereby ensuring that the positioning mechanism 2 can move accurately and stably to the predetermined position. The specific rotation speed should be rationally designed according to the size and shape of the cylindrical workpiece.

[0049] In some embodiments, to ensure stable placement of the workpiece, a horizontal support plate 7 is provided directly below the positioning mechanism 2. The support plate 7 is used to place the cylindrical workpiece to be positioned, and the cylindrical workpiece can slide relative to the support plate 7. The horizontal support plate 7 is provided directly below the positioning mechanism 2 to ensure stable placement of the cylindrical workpiece. The horizontal design of the support plate 7 ensures that the positioning accuracy is not affected by tilting of the workpiece during placement, and the relative sliding design between the workpiece and the support plate 7 also facilitates fine-tuning during the positioning process.

[0050] In some embodiments, a lifting device 8 is also provided at the bottom of the support plate 7 to achieve workpiece height adjustment. The lifting device 8 is electrically connected to the control unit 6 and is used to lift the cylindrical workpiece placed on the support plate 7. The lifting device 8 at the bottom of the support plate 7 is for flexible adjustment of the height of the cylindrical workpiece. Through precise control of the lifting device 8 by the control unit 6, the height position of the workpiece can be adjusted according to the size and positioning requirements of different workpieces, thereby ensuring that the positioning mechanism 2 can accurately and stably clamp the workpiece. Specific lifting devices 8 include electric pneumatic rods or mechanical transmission lifting devices, which are common technical fields and will not be described in detail here.

[0051] This positioning system for cylindrical workpieces achieves precise positioning and stable operation through the ingenious cooperation of the guide mechanism 1 and the positioning mechanism 2, as well as the real-time monitoring and feedback of the first and second sensors 4. Simultaneously, the intelligent configuration of the control unit 6 ensures the accuracy and safety of the positioning process, effectively solving the problems of low positioning accuracy and poor stability in traditional positioning methods.

[0052] Example 2

[0053] A method for positioning a cylindrical workpiece includes the following steps:

[0054] S1: Place the cylindrical workpiece on the horizontal support plate 7 directly below the positioning mechanism 2, ensuring that the side of the cylindrical workpiece is perpendicular to the support plate 7 when it is placed.

[0055] S2: Lift the cylindrical workpiece so that the four connecting rods 22 of the positioning mechanism 2 are fitted onto the inner wall but do not contact the side of the cylindrical workpiece.

[0056] S3: Start motor 5, which drives the four connecting rods 22 to move under the action of guide mechanism 1.

[0057] S4: When any two first sensors 3 located on the symmetrical side detect that the pressure values ​​are equal at a certain moment, the motor 5 rotates in the opposite direction.

[0058] S5: When any two second sensors 4 located on the symmetrical side detect that the pressure values ​​are equal at a certain moment, turn off the motor 5 to complete the positioning.

[0059] This positioning method, applicable to cylindrical workpieces, further enhances the adaptability and convenience of positioning through the smooth drive of the slow-speed motor 5, the stable placement of the support plate 7, and the height adjustment function of the lifting device 8. Furthermore, the overload safety protection mechanism of the alarm module effectively avoids excessive pressure during the positioning process, ensuring both positioning effectiveness and workpiece processing quality.

[0060] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A positioning system suitable for cylindrical workpieces, characterized in that, include: The guiding mechanism includes two guide rails that are perpendicular to each other and stacked. Each of the two guide rails has two sliders that are slidably disposed inside. One of the guide rails is rotatably connected to a bidirectional screw, and the two threads of the bidirectional screw in different directions respectively cooperate with different sliders. Positioning mechanism: includes four sets of mounting parts and four connecting rods that are hinged to the mounting parts in sequence, forming a parallelogram structure. The mounting parts are fixed to the lower ends of different sliders. Four primary sensors are respectively installed on the inner walls of the four connecting rods; Four second sensors: respectively installed on the four sets of mounting parts; Motor: Fixed to one side of the bidirectional screw, the motor drives two sliders in the same guide rail to slide towards or away from each other by rotating the bidirectional screw. Under the parallelogram structure of the positioning mechanism, it drives the other two sliders to slide towards or away from each other. Control unit: connected to the motor, the first sensor, and the second sensor.

2. The positioning system for cylindrical workpieces according to claim 1, characterized in that: The control unit is configured to: When any two first sensors detect that the pressure values ​​are equal at the same time, the motor is driven in reverse. When any two second sensors detect that the pressure values ​​are equal at the same time, the motor is turned off.

3. The wire-tightening structure of a multi-wire cutting device according to claim 1, characterized in that: Both the first and second sensors are strain gauge pressure sensors.

4. A positioning system suitable for cylindrical workpieces according to claim 1, characterized in that: The control unit also includes an alarm module, which has a preset maximum pressure threshold. When the pressure value detected by either the first sensor or the second sensor exceeds the maximum pressure threshold during the motor drive process, the control unit triggers an alarm and shuts down the motor.

5. A positioning system suitable for cylindrical workpieces according to claim 1, characterized in that: The motor is a slow-speed motor.

6. A positioning system suitable for cylindrical workpieces according to claim 1, characterized in that: A horizontal support plate is also provided directly below the positioning mechanism. The support plate is used to place the cylindrical workpiece to be positioned, and the cylindrical workpiece can slide relative to the support plate.

7. A positioning system suitable for cylindrical workpieces according to claim 6, characterized in that: The bottom of the support plate is also provided with a lifting device, which is electrically connected to the control unit and is used to lift the cylindrical workpiece placed on the support plate.

8. A method for positioning a cylindrical workpiece using the positioning system as described in any one of claims 1-6, characterized in that, Includes the following steps: S1: Place the cylindrical workpiece on the horizontal support plate directly below the positioning mechanism, ensuring that the side of the cylindrical workpiece is perpendicular to the support plate when it is placed. S2: Lift the cylindrical workpiece so that the inner walls of the four connecting rods of the positioning mechanism do not contact the side of the cylindrical workpiece. S3: Start the motor, which drives the four linkages to move under the action of the guide mechanism; S4: When any two first sensors located on the symmetrical side detect that the pressure values ​​are equal at a certain instant, the motor rotates in the opposite direction; S5: When any two second sensors located on symmetrical sides detect that the pressure values ​​are equal at a certain instant, the motor is turned off to complete the positioning.

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