Device and method for testing stripping force of optical fiber coating

Abstract

The invention provides an optical fiber coating stripping force testing device and method, and belongs to the technical field of optical fiber testing, and the optical fiber coating stripping force testing device comprises a dynamometer and a testing clamp; the test fixture comprises an upper fixed mounting mechanism and a lower fixed mounting mechanism; the upper fixing and mounting mechanism comprises a fixing frame, a stripping clamp and an adjusting and positioning piece, the fixing frame is fixedly connected with the driving end of the dynamometer, a containing cavity is formed in the fixing frame, and an observation opening is formed in the fixing frame; the stripping pliers are installed in the containing cavity, and the adjusting and positioning piece is installed on the fixing frame and used for fixing the stripping pliers; the lower fixed mounting mechanism comprises a fixed column, a guide wheel and a buckle, the fixed column is fixedly mounted at the bottom of the dynamometer, and the guide wheel is mounted on the fixed column and provided with a guide rail groove; the buckle is installed on the guide wheel and used for fixing the optical fiber on the guide wheel. According to the optical fiber coating stripping force testing device provided by the invention, stripping pliers corresponding to optical fibers with different sizes can be mounted, so that the functionality of the testing device is improved, and an optical fiber stripping force testing structure is accurate.

Description

Technical Field

[0001] The invention belongs to the technical field of optical fiber testing, and more specifically, relates to an optical fiber coating stripping force testing device and method. Background Art

[0002] Fiber stripping force testing is an indispensable part of fiber manufacturing and quality control. It mainly focuses on the force required to strip the outer protective layer of the fiber during the fiber manufacturing process. This indicator directly affects the strength and stability of the fiber during use. With the continuous development of fiber technology, higher requirements are placed on the accuracy and convenience of fiber stripping force testing. Accurate measurement of fiber stripping force is of great significance for evaluating fiber performance, optimizing production processes, and ensuring product quality. Improved accuracy can more accurately reflect the adhesion between the fiber coating and the fiber substrate, thereby guiding material selection and process control in the production process. With the expansion of fiber production scale and the improvement of automation level, higher requirements are also placed on the convenience of fiber stripping force testing, including easy operation of test equipment, high degree of automation of the test process, and rapid acquisition of test results. At present, when testing the stripping force of optical fibers, it is impossible to adapt to optical fibers of different diameters, the functionality is poor, and the test results of optical fibers are inaccurate. Summary of the invention

[0003] The purpose of the present invention is to provide a device and method for testing the stripping force of optical fiber coating, so as to solve the technical problems existing in the prior art that the stripping force test of optical fiber cannot adapt to optical fibers of different diameters, the functionality is poor, and the test results of the optical fiber are inaccurate.

[0004] To achieve the above object, the technical solution adopted by the present invention is: to provide an optical fiber coating stripping force testing device, including a force gauge and a test fixture installed on the force gauge; the test fixture includes an upper fixed installation mechanism and a lower fixed installation mechanism for installation on the force gauge; The upper fixed installation mechanism includes a fixing frame, a stripping clamp and an adjusting positioning member, the fixing frame is used to be fixedly connected to the driving end of the dynamometer, a receiving cavity is provided in the fixing frame, and the receiving cavity is formed by extending upward from the lower end of the fixing frame; an observation port connected to the receiving cavity is provided on the outer surface of the fixing frame; the stripping clamp is installed in the receiving cavity, and the adjusting positioning member is installed on the fixing frame, and one end of the adjusting positioning member is located in the receiving cavity, and is used to fix the stripping clamp; The lower fixed installation mechanism includes a fixed column, a guide wheel and a buckle. The fixed column is used to be fixedly installed on the bottom of the dynamometer and is located below the fixed frame; the guide wheel is installed on the fixed column, and the guide wheel is provided with a guide groove for optical fiber winding; the buckle is installed on the guide wheel and is used to fix the optical fiber on the guide wheel.

[0005] In a possible implementation, detachably connected side panels are provided on both sides of the fixing frame, mounting holes are provided on the side panels, and the adjustment positioning member is installed in the mounting holes.

[0006] In a possible implementation, both side panels are provided with mounting holes, and the mounting holes are screw holes. The adjustment positioning member includes two bolts, and the two bolts are respectively threadedly connected in the mounting holes.

[0007] In a possible implementation, a first connecting hole is provided on each of the two side panels, and the fixing frame is also provided with a locking beam for tightening the two side panels. Two second connecting holes and two locking members are provided on the locking beam, and the two second connecting holes correspond one-to-one to the two first connecting holes. The locking members pass through the corresponding second connecting holes and the first connecting holes to fix the locking beam on the side panel.

[0008] In a possible implementation, the fixing frame also includes a bottom plate, a top plate located above the bottom plate, and two end panels installed on the front and rear sides of the bottom plate and the top plate, and the two side panels are respectively installed on the left and right sides of the bottom plate and the top plate; a through hole is provided on the bottom plate, and the bottom plate, the top plate, the two end panels and the side panels form the accommodating cavity, and the observation port is opened on the end panel.

[0009] In a possible implementation, a connecting column and a pin are provided on the top plate, the connecting column is provided with a pin hole corresponding to the driving end of the dynamometer, and the pin passes through the pin hole to fix the connecting column and the driving end of the dynamometer.

[0010] In a possible implementation, the guide rail groove is a spiral groove extending along the axial direction of the guide wheel, and the number of turns of the spiral groove is at least three.

[0011] In a possible implementation, the guide wheel is a sleeve, the buckle is installed at the end of the sleeve, and the buckle has a slot that is clamped on the side wall of the sleeve.

[0012] The optical fiber coating stripping force testing device provided by the present invention has the following beneficial effects: compared with the prior art, when the optical fiber coating stripping force testing device of the present invention is working, it is necessary to install a stripping clamp in advance in the accommodating cavity of the fixed frame, and select different stripping clamps according to the size of the optical fiber to be tested; specifically, the adjusting positioning member is opened to install the stripping clamp of the required size into the accommodating cavity, and the stripping clamp is fixed in the accommodating cavity with the help of the adjusting positioning member, so as to complete the coating stripping force test of optical fibers of different sizes, thereby improving the functionality of the optical fiber coating stripping force testing device; the upper end of the optical fiber is fixedly connected to the stripping clamp on the fixed frame, the lower end of the optical fiber extends downward and is wound in the guide rail groove on the guide wheel, and the optical fiber is fixed on the guide wheel with a buckle; and the optical fiber is firmly fixed on the guide wheel by means of the optical fiber being wound on the guide rail groove, and in the process of pulling the optical fiber for testing by the driving end of the force gauge, the optical fiber will not bend and the verticality is high, thereby ensuring that the test accuracy of the optical fiber coating stripping force is high; in this way, stripping clamps corresponding to optical fibers of different sizes can be installed, thereby improving the functionality of the testing device and making the optical fiber stripping force testing structure accurate.

[0013] Another object of the present invention is to provide a method for testing the stripping force of an optical fiber coating, comprising any one of the above-mentioned optical fiber coating stripping force testing devices, and further comprising: S1: Place the optical fiber to be tested in a vertical, unbent state under standard atmospheric pressure for 2 hours to release the tension and curvature of the optical fiber; S2: clamp the upper end of the optical fiber on the stripping pliers, and the upper end protrudes 3-4 cm from the blade of the stripping pliers; and fix the stripping pliers in the accommodating cavity; the lower end of the optical fiber passes through the accommodating cavity and extends downward; and the fixing frame is fixedly connected to the driving end of the force gauge; S3: Open the test software and clear the parameters on the test interface; S4: Install the lower fixed installation mechanism on the dynamometer and place it below the fixed frame; wind the lower end of the optical fiber in the guide groove of the guide wheel, and adjust the winding force of the optical fiber on the guide groove according to the real-time force value of the test interface, so that the stripping force value is maintained within the range of 0.04N-0.08N to keep the optical fiber vertically stable; and use the buckle to fix the optical fiber on the guide wheel; S5: setting the stripping rate and starting the driving end on the force gauge until the coating layer is completely stripped from the optical fiber, and recording the stripping force; S6: Repeat the test and calculate the average value of the peel force.

[0014] The optical fiber coating stripping force testing method provided by the present invention adopts an optical fiber coating stripping force testing device. Therefore, the optical fiber coating stripping force testing device described above is adopted. Therefore, during the test, the guide wheel is subjected to uniform force in the vertical direction by means of the guide rail and the stripping clamp installed in the fixed frame, and a certain stripping force is added to the optical fiber in advance to avoid additional twisting in the vertical direction when the optical fiber is stripped, thereby ensuring the consistency and stability of each test, and the test result has a high accuracy. Stripping clamps of different sizes are installed by adjusting the positioning piece to achieve testing of optical fibers of different sizes.

[0015] In a possible implementation, in S2, the size of the stripping pliers corresponding to the size of the optical fiber is selected and installed in the accommodating cavity of the fixing frame; and the blade of the stripping pliers is cleaned so that there is no residue on the blade of the stripping pliers. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 A schematic diagram of the structure of the upper fixed installation mechanism provided in an embodiment of the present invention Figure 1 ; Figure 2 A schematic diagram of the structure of the upper fixed installation mechanism provided in an embodiment of the present invention Figure 2 ; Figure 3 A schematic structural diagram of a lower fixed installation mechanism provided in an embodiment of the present invention.

[0018] Among them, the reference numerals in the figure are: 1. Upper fixed installation mechanism; 11. Fixed frame; 111. Side plate; 112. Bottom plate; 113. Top plate; 114. End plate; 12. Adjustment and positioning member; 13. Accommodation cavity; 14. Locking beam; 15. Locking member; 16. Connecting column; 17. Pin hole; 2. Lower fixed installation mechanism; 21. Fixed column; 22. Guide wheel; 23. Buckle; 24. Guide rail groove. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0021] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0023] See also Figures 1 to 3 The optical fiber coating stripping force testing device provided by the present invention is now described. An optical fiber coating stripping force testing device includes a force gauge and a test fixture installed on the force gauge; the test fixture includes an upper fixed installation mechanism 1 and a lower fixed installation mechanism 2 for installation on the force gauge; the upper fixed installation mechanism 1 includes a fixing frame 11, a stripping clamp and an adjustment positioning member 12, the fixing frame 11 is used to be fixedly connected to the driving end on the force gauge, and a receiving cavity 13 is provided in the fixing frame 11, and the receiving cavity 13 is formed by extending upward from the lower end of the fixing frame 11; the outer surface of the fixing frame 11 is provided with a The stripping forceps is installed in the accommodating cavity 13, the adjusting positioning member 12 is installed on the fixing frame 11, and one end is located in the accommodating cavity 13, which is used to fix the stripping forceps; the lower fixed installation mechanism 2 includes a fixing column 21, a guide wheel 22 and a buckle 23, the fixing column 21 is used to be fixedly installed on the bottom of the dynamometer, and is located below the fixing frame 11; the guide wheel 22 is installed on the fixing column 21, and the guide wheel 22 is provided with a guide groove 24 for winding the optical fiber; the buckle 23 is installed on the guide wheel 22, and is used to fix the optical fiber on the guide wheel 22.

[0024] Compared with the prior art, the optical fiber coating stripping force testing device provided by the present invention needs to install a stripping clamp in the accommodating cavity 13 of the fixing frame 11 in advance when working, and select different stripping clamps according to the size of the optical fiber to be tested; specifically, the adjusting positioning member 12 is opened and the stripping clamp of the required size is installed in the accommodating cavity 13, and the stripping clamp is fixed in the accommodating cavity 13 by means of the adjusting positioning member 12, so as to complete the coating stripping force test of optical fibers of different sizes, thereby improving the functionality of the optical fiber coating stripping force testing device; the upper end of the optical fiber is fixed to the stripping clamp on the fixing frame 11, and the stripping clamp is fixed to the accommodating cavity 13 ... and the stripping clamp is fixed to the accommodating cavity 13, so as to complete the coating stripping force test of optical fibers of different sizes, thereby improving the functionality of the optical fiber coating stripping force testing device; the stripping clamp is fixed to the accommodating cavity 13, and the stripping clamp is fixed to the accommodating cavity 13, and the stripping clamp is fixed to the accommodating cavity 13, and the stripping clamp is fixed to the accommodating cavity 13, and the stripping force test of the optical fiber of the prior art is completed; The lower end of the optical fiber extends downward and is wound in the guide groove 24 on the guide wheel 22, and the optical fiber is fixed on the guide wheel 22 by using the buckle 23; and the optical fiber is firmly fixed on the guide wheel 22 by means of the optical fiber being wound on the guide groove 24, and in the process of pulling the optical fiber for testing at the driving end of the force gauge, the optical fiber will not bend and has a high verticality, thereby ensuring a high accuracy in testing the stripping force of the optical fiber coating; in this way, stripping pliers corresponding to optical fibers of different sizes can be installed, thereby improving the functionality of the test device and making the optical fiber stripping force test structure accurate.

[0025] When the optical fiber is installed on the upper fixed installation mechanism 1 and the lower fixed installation mechanism 2, the optical fiber is in a vertical state, and the notch where the stripping clamp interacts with the optical fiber is aligned with the first guide groove 24 on the guide wheel 22 where the optical fiber is wound.

[0026] See also Figure 1 and Figure 2 As a specific embodiment of the optical fiber coating stripping force testing device provided by the present invention, detachable side panels 111 are provided on both sides of the fixing frame 11, and mounting holes are provided on the side panels 111, and the adjusting positioning members 12 are installed in the mounting holes; when installing the stripping pliers, the two side panels 111 are removed from the fixing frame 11, and then the stripping pliers are installed in the accommodating cavity 13, and are located in the center of the accommodating cavity 13; and then the two side panels 111 are reinstalled on the fixing frame 11, and the stripping pliers are fixed with the adjusting positioning members 12, and the installation is convenient and accurate. The side panels 111 and the fixing frame 11 are fixedly connected by screws.

[0027] Specifically, both side plates 111 are provided with mounting holes, and the mounting holes are screw holes. The adjustment positioning member 12 includes two bolts, and the two bolts are respectively threadedly connected to the mounting holes; both side plates 111 are provided with mounting holes connected to the accommodating cavity 13, and the mounting holes are tapped to form screw holes; the adjustment positioning member 12 includes two bolts, and the bolts are threadedly connected to the mounting holes on the outside of the mounting frame, and the ends of the bolts enter the accommodating cavity 13 and squeeze the stripping pliers, thereby fixing the stripping pliers. A positioning pad is installed at the end of the bolt, and when the bolt is screwed, the positioning pad acts on the stripping pliers.

[0028] See also Figure 1 and Figure 2 As a specific embodiment of the optical fiber coating stripping force testing device provided by the present invention, a first connecting hole is provided on each of the two side panels 111, and a locking beam 14 for tightening the two side panels 111 is also provided on the fixing frame 11, and two second connecting holes and two locking members 15 are provided on the locking beam 14, and the two second connecting holes correspond to the two first connecting holes one by one, and the locking members 15 pass through the corresponding second connecting holes and the first connecting holes to fix the locking beam 14 on the side panels 111; a first connecting hole is opened on the front end surface of the side panel 111, and the first connecting holes are located at the same height; after the two side panels 111 are connected to the fixing frame 11, the locking beam 14 is installed on the two side panels 111, and the two second connecting holes on the locking beam 14 are coaxially aligned with the two first connecting holes, and then the locking member 15 is used to pass through the second connecting hole and the first connecting hole to fix the locking beam 14 and the two side panels 111 together, so that the two side panels 111 are more securely fixed and installed. The first connecting hole is set to be a screw hole, and the locking member 15 is a screw.

[0029] See also Figure 1 and Figure 2 As a specific embodiment of the optical fiber coating stripping force testing device provided by the present invention, the fixing frame 11 also includes a bottom plate 112, a top plate 113 located above the bottom plate 112, and two end panels 114 installed on the front and rear sides of the bottom plate 112 and the top plate 113, and two side panels 111 are installed on the left and right sides of the bottom plate 112 and the top plate 113 respectively; the bottom plate 112 is provided with a through hole, and the bottom plate 112, the top plate 113, the two end panels 114 and the side panels 111 form a receiving cavity 13, and the observation port is opened on the end panel 114; A through hole corresponding to the accommodating cavity 13 is formed at the lower end of the bottom plate 112, so that the optical fiber can smoothly pass through the accommodating hole and be connected to the stripping clamp; end panels 114 are installed on the front and rear sides of the bottom plate 112, the two sides are side panels 111, and the top is a top plate 113, so as to form a fixed frame 11 with an accommodating cavity 13; and an observation port is formed on the end panel 114, through which the length of the optical fiber inserted in the stripping clamp, whether the optical fiber is curled or not, etc. can be observed, and at the same time, the optical fiber debris and residues after stripping can be removed from the through hole of the bottom plate 112.

[0030] See also Figure 1 and Figure 2As a specific embodiment of the optical fiber coating stripping force testing device provided by the present invention, a connecting column 16 and a pin are provided on the top plate 113, and a pin hole 17 corresponding to the driving end of the dynamometer is provided on the connecting column 16, and the pin passes through the pin hole 17 to fix the connecting column 16 and the driving end of the dynamometer; when the fixing frame 11 is installed on the dynamometer, the connecting column 16 extends into the dynamometer and is connected to the driving end, wherein the pin hole 17 corresponds to the through hole on the driving end, and then the pin is passed through the pin hole 17 and the through hole to achieve a fixed connection between the driving end and the connecting column 16. The connecting column 16 and the top plate 113 are set as an integrated structure, and the test process is more stable and smooth.

[0031] See also Figure 3 As a specific embodiment of the optical fiber coating stripping force testing device provided by the present invention, the guide groove 24 is a spiral groove extending axially along the guide wheel 22, and the number of turns of the spiral groove is at least three; that is, when the lower end of the optical fiber is connected to the guide wheel 22, the lower end of the optical fiber is wound along the spiral direction of the spiral groove, which increases the connection force between the optical fiber and the guide wheel 22, further improves the straightening state of the optical fiber during the test, and ensures the accuracy of the test results.

[0032] See also Figure 3 As a specific embodiment of the optical fiber coating stripping force testing device provided by the present invention, the guide wheel 22 is a sleeve, the buckle 23 is installed at the end of the sleeve, and the buckle 23 has a slot that is clamped on the side wall of the sleeve; the outermost guide groove 24 is aligned with the jaws of the stripping pliers up and down; the slot of the buckle 23 is clamped at the end of the sleeve, and the inner wall of the slot corresponds to the outermost guide groove 24, and the optical fiber installed in the guide groove 24 is fixed on the guide wheel 22.

[0033] Not shown in the figure, an embodiment of the present invention further provides a method for testing the stripping force of an optical fiber coating. The method for testing the stripping force of an optical fiber coating includes any one of the above-mentioned optical fiber coating stripping force testing devices, and further includes: S1: Place the optical fiber to be tested under standard atmospheric pressure and let it stand for 2 hours. During the standing period, ensure that the entire optical fiber to be tested, especially the optical fiber connected between the stripping clamp and the guide wheel, is in a vertical and unbent state, so that the tension and curvature of the optical fiber can be released; S2: Clamp the upper end of the optical fiber on the stripping clamp, insert one end of the optical fiber to be tested into the stripping clamp from the bottom to the top from the blade of the stripping clamp, and the upper end of the optical fiber exceeds the stripping clamp by 3-4 cm; and fix the stripping clamp in the accommodating cavity 13; the lower end of the optical fiber extends downward through the accommodating cavity 13; and fix the fixing frame 11 to the driving end of the force gauge; S3: Open the test software and clear the parameters on the test interface; S4: Install the lower fixed installation mechanism 2 on the dynamometer and place it below the fixed frame 11; wind the lower end of the optical fiber in the guide groove 24 of the guide wheel 22, and adjust the winding force of the optical fiber on the guide groove 24 according to the real-time force value of the test interface, so that the stripping force value is maintained within the range of 0.04N-0.08N to keep the optical fiber vertically stable; and use the buckle 23 to fix the optical fiber on the guide wheel 22; S5: Set the stripping rate and start the driving end on the force gauge until the coating is completely stripped from the optical fiber, and record the stripping force; S6: Repeat the test and calculate the average value of the peel force.

[0034] The optical fiber coating stripping force testing method provided in the embodiment of the present invention adopts the optical fiber coating stripping force testing device mentioned above. Therefore, during the test, the guide rail and the stripping clamp installed in the fixed frame 11 are used to make the guide wheel 22 bear the force in the vertical direction uniformly, and a certain stripping force is added to the optical fiber in advance to avoid additional twisting in the vertical direction when the optical fiber is stripped, thereby ensuring the consistency and stability of each test, and the test result has a high accuracy. Stripping clamps of different sizes are installed by adjusting the positioning piece 12 to test optical fibers of different sizes. During operation, the moving speed of an optical fiber with a diameter of 80μm is set to 500mm / min, and the moving speed of an optical fiber with a diameter of 125μm is set to 300mm / min.

[0035] As a specific implementation of the optical fiber coating stripping force testing method provided by the present invention, in S2, the size of the stripping pliers corresponding to the size of the optical fiber is selected and installed in the accommodating cavity 13 of the fixing frame 11; and the blade of the stripping pliers is cleaned so that there is no residue on the blade of the stripping pliers; with the help of the adjusting positioning member 12, stripping pliers of different sizes can be effectively and securely positioned, so that optical fibers of different sizes can be tested, and the functionality is stronger. In addition, the blade of the stripping pliers is cleaned in advance, and the end face and coating part of the optical fiber inserted into the fixing frame 11 must be clean, neat, and without bending.

[0036] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An optical fiber coating stripping force testing device, comprising a force gauge and a test fixture mounted on the force gauge; characterized in that: The test fixture includes an upper fixed mounting mechanism and a lower fixed mounting mechanism for mounting on the dynamometer; The upper fixed installation mechanism includes a fixing frame, a stripping clamp and an adjusting positioning member, the fixing frame is used to be fixedly connected to the driving end of the dynamometer, a receiving cavity is provided in the fixing frame, and the receiving cavity is formed by extending upward from the lower end of the fixing frame; an observation port connected to the receiving cavity is provided on the outer surface of the fixing frame; the stripping clamp is installed in the receiving cavity, and the adjusting positioning member is installed on the fixing frame, and one end of the adjusting positioning member is located in the receiving cavity, and is used to fix the stripping clamp; The lower fixed installation mechanism includes a fixed column, a guide wheel and a buckle. The fixed column is used to be fixedly installed on the bottom of the dynamometer and is located below the fixed frame; the guide wheel is installed on the fixed column, and the guide wheel is provided with a guide groove for optical fiber winding; the buckle is installed on the guide wheel and is used to fix the optical fiber on the guide wheel.

2. The optical fiber coating stripping force testing device according to claim 1, characterized in that: The fixing frame is provided with detachably connected side panels on both sides, the side panels are provided with mounting holes, and the adjusting positioning member is installed in the mounting holes.

3. The optical fiber coating stripping force testing device according to claim 2, characterized in that: The two side plates are both provided with mounting holes, and the mounting holes are screw holes. The adjusting positioning member includes two bolts, and the two bolts are respectively threadedly connected in the mounting holes.

4. The optical fiber coating stripping force testing device according to claim 2, characterized in that: The two side panels are each provided with a first connecting hole, and the fixing frame is also provided with a locking beam for tightening the two side panels, and the locking beam is provided with two second connecting holes and two locking members, and the two second connecting holes correspond to the two first connecting holes one by one, and the locking members pass through the corresponding second connecting holes and the first connecting holes to fix the locking beam on the side panel.

5. The optical fiber coating stripping force testing device according to claim 2, characterized in that: The fixing frame also includes a bottom plate, a top plate located above the bottom plate, and two end panels installed on the front and rear sides of the bottom plate and the top plate, and the two side panels are respectively installed on the left and right sides of the bottom plate and the top plate; a through hole is provided on the bottom plate, and the bottom plate, the top plate, the two end panels and the side panels form the accommodating cavity, and the observation port is opened on the end panel.

6. The optical fiber coating stripping force testing device according to claim 5, characterized in that: The top plate is provided with a connecting column and a pin shaft, the connecting column is provided with a pin hole corresponding to the driving end of the dynamometer, and the pin shaft passes through the pin hole to fix the connecting column and the driving end of the dynamometer.

7. The optical fiber coating stripping force testing device according to claim 1, characterized in that: The guide rail groove is a spiral groove extending along the axial direction of the guide wheel, and the number of turns of the spiral groove is at least three.

8. The optical fiber coating stripping force testing device according to claim 1, characterized in that: The guide wheel is a sleeve, the buckle is installed at the end of the sleeve, and the buckle is provided with a slot that is clamped on the side wall of the sleeve.

9. A method for testing the stripping force of optical fiber coating, characterized in that: The optical fiber coating stripping force testing device according to any one of claims 1 to 8 further comprises: S1: Place the optical fiber to be tested in a vertical, unbent state under standard atmospheric pressure for 2 hours to release the tension and curvature of the optical fiber; S2: clamp the upper end of the optical fiber on the stripping pliers, and the upper end protrudes 3-4 cm from the blade of the stripping pliers; and fix the stripping pliers in the accommodating cavity; the lower end of the optical fiber passes through the accommodating cavity and extends downward; and the fixing frame is fixedly connected to the driving end of the force gauge; S3: Open the test software and clear the parameters on the test interface; S4: Install the lower fixed installation mechanism on the dynamometer and place it below the fixed frame; wind the lower end of the optical fiber in the guide groove of the guide wheel, and adjust the winding force of the optical fiber on the guide groove according to the real-time force value of the test interface, so that the stripping force value is maintained within the range of 0.04N-0.08N to keep the optical fiber vertically stable; and use the buckle to fix the optical fiber on the guide wheel; S5: setting the stripping rate and starting the driving end on the force gauge until the coating layer is completely stripped from the optical fiber, and recording the stripping force; S6: Repeat the test and calculate the average value of the peel force.

10. The optical fiber coating stripping force testing method according to claim 9, characterized in that: In S2, the size of the stripping pliers corresponding to the size of the optical fiber is selected and installed in the accommodating cavity of the fixing frame; and the blade of the stripping pliers is cleaned so that there is no residue on the blade of the stripping pliers.

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