Graphite positioning wheel self-adapting positioning device and positioning method

Abstract

This invention discloses an adaptive positioning device and method for graphite positioning wheels, including a linear drive assembly, a first mounting plate and a second mounting plate, a synchronous opening and closing assembly, a control module, and a vision sensor. The synchronous opening and closing assembly drives the first and second mounting plates to move closer or further apart, and the first and second mounting plates are always symmetrically positioned with respect to a certain vertical plane during the process of moving closer or further apart. The vision sensor is mounted on a support frame with the vertical plane as a reference. The vision sensor is configured to identify the centerline of the glass rod to be processed. Based on the centerline data acquired by the vision sensor, the control module outputs a control signal to the linear drive assembly. Based on the control signal, the linear drive assembly adjusts the relative position of the vertical plane and the centerline of the glass rod to be processed. This invention is used to solve the problem of auxiliary positioning in the preform stretching process of small stretching equipment, and features simple processing and assembly.

Description

Technical Field

[0001] This invention relates to the field of optical fiber preform production equipment technology, especially the field of hollow optical fiber technology, and specifically to a graphite positioning wheel adaptive positioning device and positioning method. Background Technology

[0002] During the fiber optic preform stretching process, without an auxiliary positioning device, the preform will face multiple problems such as path loss of control, contamination risk, uneven diameter, and excessive curvature. Therefore, using an auxiliary positioning device during the fiber optic preform stretching process is a key factor in achieving efficient and high-quality stretching.

[0003] Currently, there are various solutions for auxiliary positioning devices, but in existing technologies, positioning devices are mainly divided into two types: passive and active. For gravity-based positioning wheel closing devices, the closing force depends on the weight of the pressure block and does not require an active drive device. However, although this positioning method has a simple structure and small space occupation, it is easily affected by vibration during the stretching and cutting process, which can easily lead to non-compliant geometric parameters at both ends of the preform. Furthermore, since the closing force comes from the weight of the pressure block, the clamping force cannot be adjusted as needed, resulting in poor positioning effect, complex adjustment, and high time cost. Active opening and closing positioning wheel devices use cylinders, electric push rods, and motors to close the positioning wheels. This type of device has controllable closing force, but it is difficult to process and assemble, and its size is large, making it unsuitable for small stretching towers. Moreover, neither of these two auxiliary positioning devices can automatically adjust the mechanism position; both require alignment adjustment after a period of operation to ensure that the center of the positioning wheel group coincides with the center of the preform. However, existing alignment adjustment schemes are still at a very basic level, time-consuming, labor-intensive, and lacking in accuracy, which can have a significant impact when production capacity is tight. Summary of the Invention

[0004] To address the aforementioned deficiencies in existing technologies, a graphite positioning wheel adaptive positioning device and positioning method are provided to solve the problem of auxiliary positioning in the preform stretching process of small stretching equipment. This device features simple processing and easy assembly.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0006] Firstly, the graphite positioning wheel adaptive positioning device includes...

[0007] A linear drive assembly includes a fixed part and a sliding part. The fixed part is fixedly mounted on an external frame, and a support frame is provided on the sliding part.

[0008] The first mounting plate and the second mounting plate are horizontally linearly slidably connected to the support frame via a guide rail structure; the first mounting plate and the second mounting plate are respectively provided with rotating graphite wheel sets, and the two graphite wheel sets are symmetrically arranged; the glass rod to be stretched is located between the two graphite wheel sets;

[0009] The synchronous opening and closing component drives the first mounting plate and the second mounting plate to move closer or further apart from each other, and the first mounting plate and the second mounting plate are always symmetrically arranged with a certain vertical plane during the process of moving closer or further apart from each other;

[0010] The control module and vision sensor are configured to identify the centerline of the glass rod to be processed, with the vertical plane as a reference. The control module outputs a control signal to the linear drive assembly based on the centerline data acquired by the vision sensor. The linear drive assembly adjusts the relative position of the vertical plane and the centerline of the glass rod to be processed based on the control signal.

[0011] According to the above technical solution, the first mounting plate and the second mounting plate share a set of guide rail structure.

[0012] According to the above technical solution, the guide rail structure includes a guide rail slider assembly located at the lower part and a roller groove assembly located at the upper part;

[0013] The guide rail slider assembly includes a guide rail and a slider, wherein the guide rail is located on the support frame, and sliders are fixedly connected to the bottom of the first mounting plate and the second mounting plate respectively.

[0014] The roller groove assembly includes a groove and a roller. The groove is located on the support frame and the groove and the guide rail are arranged in parallel. Rollers are provided on the top of the first mounting plate and the second mounting plate, and the rotation center line of the rollers is arranged vertically.

[0015] According to the above technical solution, the synchronous opening and closing component includes a power unit and a rotating mechanism;

[0016] The rotating mechanism includes a first rotating connecting part, a second rotating connecting part, and a third rotating connecting part. The rotating mechanism is rotatably connected to the support frame through the first rotating connecting part, the rotating mechanism is rotatably connected to the first mounting plate through the second rotating connecting part, and the rotating mechanism is rotatably connected to the second mounting plate through the third rotating connecting part.

[0017] The second and third rotary connecting parts are always symmetrically distributed on both sides of the first rotary connecting part, and the rotation center lines of the three rotary connecting parts are located on the same horizontal plane; the first rotary connecting part is located on the vertical plane.

[0018] According to the above technical solution, the rotation center line of the second rotary connection part is parallel to the rotation center line of the graphite wheel assembly on the first mounting plate; the rotation center line of the third rotary connection part is parallel to the rotation center line of the graphite wheel assembly on the second mounting plate.

[0019] The power unit is connected between the support frame and the first mounting plate, or between the support frame and the second mounting plate, and drives the first mounting plate or the second mounting plate to move linearly.

[0020] According to the above technical solution, the rotation center line of the second rotary connection part coincides with the rotation center line of the graphite wheel assembly on the first mounting plate; the rotation center line of the third rotary connection part coincides with the rotation center line of the graphite wheel assembly on the second mounting plate.

[0021] The rotating mechanism includes a main connecting rod as a crank and rod end joint bearings as connecting rods; a first rotating shaft is provided on the support frame, and the middle part of the main connecting rod is rotatably connected to the first rotating shaft through a bearing, the axis of the first rotating shaft being located on the vertical plane; two second rotating shafts are respectively provided at both ends of the main connecting rod with the first rotating shaft as the center; two bearings are fixedly installed at both ends of the rod end joint bearing, one bearing is sleeved on the second rotating shaft, and the other bearing is sleeved on the wheel axle of the graphite wheel set, and the rod end joint bearings on both sides are centrally symmetrically arranged with the first rotating shaft as the center;

[0022] The power unit is a cylinder structure.

[0023] According to the above technical solution, the first, second, and third rotary connecting parts share a common rotation center line;

[0024] The rotating mechanism is a lead screw and nut structure. The lead screw is divided into three sections: the left threaded section, the middle rotating shaft section, and the right threaded section. The threads of the left and right threaded sections have opposite directions. The left threaded section is threadedly connected to the first mounting plate, the middle bearing section is rotatably connected to the support frame, and the right threaded section is threadedly connected to the second mounting plate. The power unit drives the lead screw to rotate forward or in reverse.

[0025] According to the above technical solution, the support frame includes a main support frame, a main back plate and a front baffle. The linear drive assembly is connected between the external frame and the main support frame. The main back plate and the front baffle form an installation cavity. The guide rail structure is set on the main back plate, and a through groove for passing through the graphite wheel set is opened on the front baffle. The length of the through groove matches the linear movement range of the graphite wheel set.

[0026] A vision sensor is mounted on top of the support frame and is used to acquire data on the centerline of the glass rod to be processed between the graphite wheel sets on the outer side of the front baffle.

[0027] According to the above technical solution, the vision sensor is an industrial camera or a 3D vision module.

[0028] Secondly, a positioning method using an adaptive positioning device with a graphite positioning wheel as described in any of the above-described methods, the method comprising:

[0029] A vision sensor is installed based on the symmetrical vertical plane of the two graphite wheel sets;

[0030] A vision sensor acquires image data of the centerline of the glass rod to be stretched.

[0031] Based on the image data, the deviation value between the vertical plane and the center line is obtained, and a control signal is output.

[0032] The linear drive component drives the entire support frame to move based on control signals;

[0033] The control signal is the direction and distance of movement of the sliding part in the linear drive component.

[0034] The present invention has the following beneficial effects:

[0035] 1. A vision sensor is installed on the support frame, using the symmetrical plane (i.e., the vertical plane) of the two graphite wheel sets as a reference. The vision sensor acquires image data of the centerline of the glass rod to be processed in real time. Since the vision sensor is installed with the symmetrical plane (i.e., the vertical plane) as a reference, the symmetrical plane (i.e., the vertical plane) has a corresponding reference object in the image data that the vision sensor can recognize. Therefore, by comparing the deviation value between the symmetrical plane (i.e., the vertical plane) and the centerline of the glass rod to be processed, the deviation value is obtained. Based on the deviation value, a control signal value is output to linearly drive the component. The linear drive component controls the movement direction and distance of the support frame, thereby achieving the purpose of automated position adjustment of the graphite wheels.

[0036] The above structure can effectively solve the problems of path loss of control, contamination risk, uneven diameter and large curvature during the preform stretching process; through the control module and vision sensor, the automatic detection of position difference and automatic adjustment of alignment function can be realized, thereby improving the production quality of preforms and the reliability of stretching equipment.

[0037] 2. Guide rail slider assemblies are installed between the bottom of the first mounting plate and the support frame, and between the bottom of the second mounting plate and the support frame. The high-precision guidance of these assemblies ensures the stability of the sliding connection between the first and second mounting plates. Roller groove assemblies are installed between the top of the first mounting plate and the support frame, and between the top of the second mounting plate and the support frame. The edges and grooves of the rollers horizontally limit the mounting plates. A certain gap can exist between the top of the groove and the roller, thereby ensuring linear movement of the mounting plates while reducing the difficulty of installing them on the support frame and simplifying the assembly process.

[0038] 3. A synchronized opening and closing assembly is installed to ensure that the first and second mounting plates move the same distance and are always symmetrically distributed on the same vertical plane. Furthermore, two types of synchronized opening and closing assemblies are provided to meet the needs of various application scenarios and improve versatility.

[0039] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Specific embodiments of the present invention are given in detail below with reference to the accompanying drawings. Attached Figure Description

[0040] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention.

[0041] Figure 1 This is a schematic diagram of the structure of an embodiment provided by the present invention;

[0042] Figure 2 This is a schematic diagram of the structure of the first mounting plate and the second mounting plate provided in the embodiment of the present invention. Figure 1 ;

[0043] Figure 3 This is a schematic diagram of the structure of the first mounting plate and the second mounting plate provided in the embodiment of the present invention. Figure 2 ;

[0044] Figure 4 This is a schematic diagram of the structure of the vision sensor provided in an embodiment of the present invention;

[0045] Figure 5 This is a three-dimensional embodiment of the present invention. Figure 1 (Remove the front panel);

[0046] Figure 6 This is a three-dimensional embodiment of the present invention. Figure 2 (Remove the front panel);

[0047] Figure 7 This is a three-dimensional embodiment of the present invention. Figure 3 (Remove the front panel);

[0048] Figure 8 This is a flowchart of the positioning method provided by an embodiment of the present invention;

[0049] In the diagram, 1. Linear drive assembly; 2. External frame; 3. Support frame; 3-1. Main support frame; 3-2. Main back plate; 3-4. Front baffle; 4. First mounting plate; 5. Second mounting plate; 6. Graphite wheel assembly; 6-1. Graphite wheel; 6-2. Wheel axle; 7. Synchronous opening and closing assembly; 7-1. Main connecting rod; 7-2. Rod end joint bearing; 8. Control module and vision sensor; 9. Guide rail slider assembly; 10. Roller groove assembly; 11. Cylinder structure. Detailed Implementation

[0050] The following is in conjunction with the appendix Figure 1-8 The principles and features of the present invention are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of the invention. The invention is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the invention will become clearer from the following description and claims. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.

[0051] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0053] Reference Figures 1-7 As shown, the present invention provides an adaptive positioning device for a graphite positioning wheel.

[0054] Example 1

[0055] include,

[0056] The linear drive assembly 1 includes a fixed part and a sliding part. The fixed part is fixedly mounted on the outer frame 2, and the sliding part is provided with a support frame 3. The linear drive assembly adopts an existing structure, such as a motor-driven gear and rack transmission with a guide rail, or a motor-driven lead screw and nut transmission with a guide rod, or a telescopic cylinder (one of a pneumatic cylinder, hydraulic cylinder, or electric cylinder) drive with a guide rail.

[0057] A first mounting plate 4 and a second mounting plate 5 are horizontally and linearly slidably connected to the support frame via a guide rail structure. Rotating graphite wheel sets 6 are respectively provided on the first and second mounting plates, and the two graphite wheel sets are symmetrically arranged. The glass rod to be stretched is located between the two graphite wheel sets. The graphite wheel set is an existing structure, including a graphite wheel 6-1 and a wheel axle 6-2. The specific dimensions of the graphite wheel set are related to the diameter parameters of the preform rod and can be non-standard designed according to actual needs.

[0058] The synchronous opening and closing component 7 drives the first mounting plate and the second mounting plate to move closer or further apart from each other, and the first mounting plate and the second mounting plate are always symmetrically arranged with a certain vertical plane during the process of moving closer or further apart from each other.

[0059] The control module and vision sensor 8 are mounted with the vertical plane as a reference. The vision sensor is fixedly mounted on the support frame. The vision sensor is configured to identify the center line of the glass rod to be processed. Based on the data of the center line obtained by the vision sensor, the control module outputs a control signal to the linear drive component. Based on the control signal, the linear drive component adjusts the relative position of the vertical plane and the center line of the glass rod to be processed.

[0060] A vision sensor is installed on the support frame, using the symmetrical plane (i.e., the vertical plane) of the two graphite wheel sets as a reference. The vision sensor acquires image data of the centerline of the glass rod to be processed in real time. Since the vision sensor is installed with the symmetrical plane (i.e., the vertical plane) as a reference, the symmetrical plane (i.e., the vertical plane) has a corresponding reference object in the image data that the vision sensor can recognize. Therefore, by comparing the deviation value between the symmetrical plane (i.e., the vertical plane) and the centerline of the glass rod to be processed, the deviation value is obtained. Based on the deviation value, a control signal value is output to linearly drive the component, which controls the movement direction and distance of the support frame, thereby achieving the purpose of automated position adjustment of the graphite wheels.

[0061] The above structure can effectively solve the problems of path loss of control, contamination risk, uneven diameter and large curvature during the preform stretching process; through the control module and vision sensor, the automatic detection of position difference and automatic adjustment of alignment function can be realized, thereby improving the production quality of preforms and the reliability of stretching equipment.

[0062] Example 2

[0063] Based on Embodiment 1, a preferred structural form in which the first mounting plate and the second mounting plate slide horizontally linearly on the support frame is given.

[0064] The first mounting plate and the second mounting plate share a set of guide rail structure.

[0065] Specifically, the guide rail structure includes a guide rail slider assembly 9 located at the lower part and a roller groove assembly 10 located at the upper part.

[0066] The guide rail and slider assembly includes a guide rail and a slider, wherein the guide rail is located on the support frame, and sliders are fixedly connected to the bottom of the first mounting plate and the second mounting plate, respectively.

[0067] The roller groove assembly includes a groove and a roller. The groove is located on the support frame and the groove and the guide rail are arranged in parallel. Rollers are provided on the top of the first mounting plate and the second mounting plate, and the rotation center line of the rollers is arranged vertically.

[0068] In the above structure, guide rail slider assemblies are installed between the bottom of the first mounting plate and the support frame, and between the bottom of the second mounting plate and the support frame. The high-precision guidance of these guide rail slider assemblies ensures the stability of the sliding connection between the first and second mounting plates. Roller groove assemblies are installed between the top of the first mounting plate and the support frame, and between the top of the second mounting plate and the support frame. The edges and grooves of the rollers horizontally limit the mounting plates. A certain gap can exist between the top of the groove and the roller, thereby ensuring that the mounting plates move only linearly while reducing the difficulty of installing the mounting plates on the support frame and simplifying the assembly process. Furthermore, this structure has lower requirements for machining precision and is less prone to jamming.

[0069] Example 3

[0070] Based on embodiments 1 and 2, to avoid the asynchronous movement of the two mounting plates due to independent driving, which would cause the symmetry plane (i.e., the vertical plane) of the two graphite wheel sets to deviate from a fixed vertical plane and ultimately prevent the glass rod from descending during processing, a synchronous opening and closing assembly is provided between the first and second mounting plates to ensure the consistency of the first and second mounting plates moving closer or further apart.

[0071] The synchronous opening and closing assembly includes a power unit and a rotating mechanism;

[0072] The rotating mechanism includes a first rotating connecting part, a second rotating connecting part, and a third rotating connecting part. The rotating mechanism is rotatably connected to the support frame through the first rotating connecting part, the rotating mechanism is rotatably connected to the first mounting plate through the second rotating connecting part, and the rotating mechanism is rotatably connected to the second mounting plate through the third rotating connecting part.

[0073] The second and third rotary connecting parts are always symmetrically distributed on both sides of the first rotary connecting part, and the rotation center lines of the three rotary connecting parts are located on the same horizontal plane; the first rotary connecting part is located on the vertical plane, that is, the second and third rotary connecting parts are always symmetrically distributed on both sides of the vertical plane.

[0074] The first rotating connection part of the synchronous opening and closing assembly is placed on the support frame, and the vertical plane and the first rotating connection part are overlapped, so as to simplify the synchronous opening and closing assembly and facilitate the selection of reference points by the vision sensor.

[0075] Based on this, two preferred synchronous opening and closing components are presented.

[0076] The first type, such as Figure 2 As shown, the rotation center line of the second rotary connection is parallel to the rotation center line of the graphite wheel assembly on the first mounting plate; the rotation center line of the third rotary connection is parallel to the rotation center line of the graphite wheel assembly on the second mounting plate; the power unit is connected between the support frame and the first mounting plate, or between the support frame and the second mounting plate, and drives the first mounting plate or the second mounting plate to move linearly.

[0077] In the first embodiment, preferably, the rotation center line of the second rotary connecting part coincides with the rotation center line of the graphite wheel assembly on the first mounting plate; the rotation center line of the third rotary connecting part coincides with the rotation center line of the graphite wheel assembly on the second mounting plate.

[0078] The rotating mechanism includes a main connecting rod 7-1 serving as a crank and a rod end spherical bearing 7-2 serving as a connecting rod. A first rotating shaft is provided on the support frame, and the middle part of the main connecting rod is rotatably connected to the first rotating shaft through a bearing. The axis of the first rotating shaft is located on the vertical plane. Two second rotating shafts are respectively provided at both ends of the main connecting rod with the first rotating shaft as the center. Two bearings are fixedly installed at both ends of the rod end spherical bearing, one bearing is sleeved on the second rotating shaft, and the other bearing is sleeved on the wheel axle of the graphite wheel set. The rod end spherical bearings on both sides are centrally symmetrically arranged with the first rotating shaft as the center.

[0079] The power unit is a cylinder structure 11, or it can be driven by a motor through a lead screw and nut, or by a motor through a gear and rack.

[0080] In the aforementioned synchronous opening and closing assembly, two crank-connecting rod mechanisms are constructed using a main connecting rod (as a crank) and a rod end spherical bearing (as a connecting rod). These two mechanisms are symmetrical about the first axis of rotation of the main connecting rod. The power unit is a conventional cylinder structure connected between the support frame and the second mounting plate. The cylinder structure drives the second mounting plate to move, and the synchronous opening and closing assembly drives the first mounting plate to move. The opening and closing power source is a cylinder. The cylinder pushes the second mounting plate, thereby causing the synchronous opening and closing assembly to rotate, enabling the first and second mounting plates to actively open and close. The cylinder's pushing force can be adjusted at any time. During the fiber optic preform stretching process, when the preform is stretched below the graphite wheel assembly, the cylinder structure brings the graphite wheel assembly together, thus positioning the preform. After the stretching operation is completed, the cylinder structure separates the graphite wheels.

[0081] The cylinder consists of a double-acting cylinder, a relay, a two-position five-way valve, a pneumatic triplet (composed of a filter, a pressure reducing valve, and an oil mist lubricator), a throttle valve, and an air source to achieve the opening and closing control of the double-acting cylinder.

[0082] The second type has the first, second, and third rotating connecting parts sharing a common rotation center line; the rotating mechanism is a lead screw and nut structure, with the lead screw divided into three sections: a left threaded section, a middle rotating shaft section, and a right threaded section, with the left and right threaded sections having opposite thread directions; the left threaded section is threadedly connected to the first mounting plate, the middle bearing section and the support frame can only be rotatably connected, and the right threaded section is threadedly connected to the second mounting plate; the power unit drives the lead screw to rotate forward or in reverse.

[0083] In embodiments 1-3, a preferred structural form of the support frame is given. The support frame includes a main support frame 3-1, a main back plate 3-2, and a front baffle 3-3. A linear drive assembly is connected between the outer frame and the main support frame. The main back plate and the front baffle form an installation cavity. A guide rail structure is provided on the main back plate, and a through groove for passing through the graphite wheel assembly is provided on the front baffle. The length of the through groove matches the linear movement range of the graphite wheel assembly. A vision sensor is installed on the top of the support frame and is used to collect data on the centerline of the glass rod to be processed between the graphite wheel assemblies on the outer side of the front baffle.

[0084] While one end uses a guide rail for sliding, the other end uses a bearing for rolling motion within a bearing groove. This structure has lower requirements for machining accuracy and is less prone to jamming.

[0085] In Examples 1-3, the vision sensor is an industrial camera or a 3D vision module. The vision sensor is fixed directly above the graphite wheel assembly, with its center aligned with the symmetrical vertical plane of the graphite wheel assembly, thereby measuring the relative position of the preform and the symmetrical vertical plane of the graphite wheel assembly.

[0086] The present invention also provides a positioning method using an adaptive positioning device with a graphite positioning wheel as described in any of the above descriptions.

[0087] After the graphite wheel assembly has been working for a period of time or has undergone special adjustments or modifications, its actual position may deviate from its theoretical position. At this time, the vision sensor can measure the deviation value between the vertical plane and the center line and feed it back to the control module, which then adjusts the position by moving the linear drive component.

[0088] like Figure 8 As shown, the positioning method specifically includes:

[0089] S1: Install a vision sensor based on the symmetrical vertical plane of the two graphite wheel sets;

[0090] S2: The vision sensor acquires image data of the centerline of the glass rod to be stretched;

[0091] S3: Based on the image data, obtain the deviation value between the vertical plane and the center line, and output a control signal;

[0092] S4: The linear drive component drives the support frame to move as a whole based on the control signal.

[0093] The control signal is the direction and distance of movement of the sliding part in the linear drive component.

[0094] The above positioning method can completely replace manual alignment adjustment, is more accurate and faster, and allows for real-time monitoring of the offset.

[0095] The structure and method described in this application are mainly used for the stretching and positioning of hollow optical fiber preforms, but can also be applied to other equipment requiring high-precision positioning.

[0096] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Those skilled in the art can readily implement the present invention based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the present invention, utilizing the disclosed technical content, are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, or variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.

Claims

1. A graphite positioning wheel self-adaptive positioning device, characterized in that: include, A linear drive assembly includes a fixed part and a sliding part. The fixed part is fixedly mounted on an external frame, and a support frame is provided on the sliding part. The first mounting plate and the second mounting plate are horizontally linearly slidably connected to the support frame via a guide rail structure; the first mounting plate and the second mounting plate are respectively provided with rotating graphite wheel sets, and the two graphite wheel sets are symmetrically arranged; the glass rod to be stretched is located between the two graphite wheel sets; A synchronous opening and closing assembly drives a first mounting plate and a second mounting plate to move closer to or further apart from each other, and the first and second mounting plates are always symmetrically arranged with respect to a certain vertical plane during the process of moving closer to or further apart. The synchronous opening and closing assembly includes a power unit and a rotating mechanism. The rotating mechanism includes a first rotating connecting part, a second rotating connecting part, and a third rotating connecting part. The rotating mechanism is rotatably connected to the support frame through the first rotating connecting part, rotatably connected to the first mounting plate through the second rotating connecting part, and rotatably connected to the second mounting plate through the third rotating connecting part. The second and third rotating connecting parts are always symmetrically distributed on both sides of the first rotating connecting part, and the rotation center lines of the three rotating connecting parts are located on the same horizontal plane. The first rotating connecting part is located on the vertical plane. The control module and vision sensor are configured to identify the centerline of the glass rod to be processed, with the vertical plane as a reference. The control module outputs a control signal to the linear drive assembly based on the centerline data obtained by the vision sensor. The linear drive assembly adjusts the relative position of the vertical plane and the centerline of the glass rod to be processed based on the control signal.

2. The graphite positioning wheel self-adaptive positioning device according to claim 1, characterized in that: The first mounting plate and the second mounting plate share a set of guide rail structure.

3. The graphite positioning wheel self-adapting positioning device according to claim 2, characterized in that: The guide rail structure includes a guide rail slider assembly at the lower part and a roller groove assembly at the upper part; The guide rail slider assembly includes a guide rail and a slider, wherein the guide rail is located on the support frame, and sliders are fixedly connected to the bottom of the first mounting plate and the second mounting plate respectively. The roller groove assembly includes a groove and a roller. The groove is located on the support frame and the groove and the guide rail are arranged in parallel. Rollers are provided on the top of the first mounting plate and the second mounting plate, and the rotation center line of the rollers is arranged vertically.

4. The graphite positioning wheel self-adapting positioning device according to claim 1, characterized in that: The rotation center line of the second rotary connector is parallel to the rotation center line of the graphite wheel assembly on the first mounting plate; the rotation center line of the third rotary connector is parallel to the rotation center line of the graphite wheel assembly on the second mounting plate. The power unit is connected between the support frame and the first mounting plate, or between the support frame and the second mounting plate, and drives the first mounting plate or the second mounting plate to move linearly.

5. The graphite positioning wheel adaptive positioning device according to claim 4, characterized in that: The rotation center line of the second rotary connector coincides with the rotation center line of the graphite wheel assembly on the first mounting plate; the rotation center line of the third rotary connector coincides with the rotation center line of the graphite wheel assembly on the second mounting plate. The rotating mechanism includes a main connecting rod as a crank and rod end joint bearings as connecting rods; a first rotating shaft is provided on the support frame, and the middle part of the main connecting rod is rotatably connected to the first rotating shaft through a bearing, the axis of the first rotating shaft being located on the vertical plane; two second rotating shafts are respectively provided at both ends of the main connecting rod with the first rotating shaft as the center; two bearings are fixedly installed at both ends of the rod end joint bearing, one bearing is sleeved on the second rotating shaft, and the other bearing is sleeved on the wheel axle of the graphite wheel set, and the rod end joint bearings on both sides are centrally symmetrically arranged with the first rotating shaft as the center; The power unit is a cylinder structure.

6. The graphite positioning wheel self-adapting positioning device according to claim 1, wherein: The first, second, and third rotary connecting parts share a common rotation center line; The rotating mechanism is a lead screw and nut structure. The lead screw is divided into three sections: the left threaded section, the middle rotating shaft section, and the right threaded section. The threads of the left and right threaded sections have opposite directions. The left threaded section is threadedly connected to the first mounting plate, the middle bearing section is rotatably connected to the support frame, and the right threaded section is threadedly connected to the second mounting plate. The power unit drives the lead screw to rotate forward or in reverse.

7. The graphite positioning wheel self-adapting positioning device according to claim 1, wherein: The support frame includes a main support frame, a main back plate, and a front baffle. The linear drive assembly is connected between the external frame and the main support frame. The main back plate and the front baffle form an installation cavity. The guide rail structure is located on the main back plate, and a through groove for passing through the graphite wheel assembly is provided on the front baffle. The length of the through groove matches the linear movement range of the graphite wheel assembly. A vision sensor is mounted on top of the support frame and is used to acquire data on the centerline of the glass rod to be processed between the graphite wheel sets on the outer side of the front baffle.

8. The graphite positioning wheel self-adapting positioning device according to claim 1, wherein: The vision sensor is an industrial camera or a 3D vision module.

9. A method of positioning, characterized by: Using the graphite positioning wheel adaptive positioning device as described in any one of claims 1-8, the method includes: A vision sensor is installed based on the symmetrical vertical plane of the two graphite wheel sets; A vision sensor acquires image data of the centerline of the glass rod to be stretched. Based on the image data, the deviation value between the vertical plane and the center line is obtained, and a control signal is output. The linear drive component drives the entire support frame to move based on control signals; The control signal is the direction and distance of movement of the sliding part in the linear drive component.

Images