A method for aligning the tilt angle of a fiber pigtail bevel

Abstract

The present application relates to a kind of alignment methods of the oblique angle of the oblique end face of pigtail, belong to optical fiber detection technical field, comprising the following steps: step 1) using ANSYS software adopts stereoscopic scanning method scanning and gathers the model data of pigtail and rectangular capillary;Step 2) the oblique angle that the end of pigtail needs to be ground is set in advance, the end of pigtail is simulated to be ground, and the deformation of pigtail grinding is analyzed;Step 3) using vector angle method analyzes the oblique angle of the end of pigtail after grinding, detects the oblique angle that the end of pigtail needs to be ground and the oblique angle of the end of pigtail after grinding;Step 4) the oblique angle of the end of pigtail after grinding is processed;The beneficial effects of the present application: by comparing the oblique angle that the end of pigtail needs to be ground and the oblique angle of the end of pigtail after grinding, the deviation between the oblique angle of the oblique end face of the pigtail after correction or detection grinding and the oblique angle of the oblique end face of the pigtail actually needed is reduced.

Description

Technical Field

[0001] This invention belongs to the field of optical fiber detection technology, and specifically relates to a method for aligning the tilt angle of the inclined end face of a pigtail. Background Technology

[0002] In the fields of communication and lidar technology, the use of beveled pigtails is often employed to reduce the impact of reflected light from the light source system on the performance of the laser chip, especially in detection systems with high noise control requirements and noise interference. Commonly used beveled angles for pigtails include 4°, 6°, 8°, and 12°. In fiber optic systems, the beveled direction of the pigtail is typically determined by grinding the beveled end face and marking the beveled direction on the pigtail in the corresponding direction. The beveled direction is then fixed by adjusting the markings on the pigtail during the fixing process. This process is essentially done by visual identification, leading to a significant deviation between the beveled direction and the design value. This is particularly problematic in light source systems where the relative positions of the positioning system need to be based on the beveled end face, resulting in large deviations in the relative design values ​​of various components and consequently reducing the coupling efficiency and return loss of the light source system.

[0003] Even though the tilt direction of the pigtail can be controlled by adjusting the rotation angle of the pigtail along the fiber core in some light source systems, in some pigtail systems with small tilt angles, such as 4° and 6° pigtail end faces, the tilt direction of the pigtail end face is not particularly sensitive to the system coupling efficiency in a small angle range (such as within 15° of the deviation angle between the pigtail tilt axis and the capillary reference axis). At the same time, there is no way to directly monitor the return loss index of the light source chip. Therefore, the tilt direction of the pigtail end face deviates significantly from the design value. Summary of the Invention

[0004] The technical problem to be solved by this invention is that the deviation between the tilt direction (tilt angle) of the beveled end face of the ground pigtail and the actual required tilt direction (tilt angle) of the beveled end face of the pigtail is large. This invention provides a method for aligning the tilt angle of the beveled end face of the pigtail. The alignment of this invention is also called calibration. By comparing the tilt angle that needs to be ground at the end of the pigtail before setting it in advance with the tilt angle after the end of the pigtail has been ground, the deviation between the calibrated or detected tilt angle of the beveled end face of the ground pigtail and the actual required tilt angle of the beveled end face of the pigtail is reduced.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0006] A method for aligning the tilt angle of the beveled end face of a pigtail includes the following steps:

[0007] Step 1): Insert the pigtail into the rectangular capillary tube, and use ANSYS software to scan and collect model data of the pigtail and the rectangular capillary tube using the 3D scanning method.

[0008] Step 2): In ANSYS software, pre-set the tilt angle at which the end of the pigtail needs to be ground, simulate the grinding of the end of the pigtail, and analyze the deformation at the grinding point.

[0009] Step 3): Stop the simulated grinding of the pigtail tip, use the vector angle method to analyze the tilt angle of the pigtail tip after grinding, and detect the tilt angle of the pigtail tip that needs to be ground before the pre-set tilt angle and the tilt angle of the pigtail tip after grinding.

[0010] Step 4): Use MasterCAM software to process the tilt angle of the pigtail end after grinding.

[0011] Optionally, in step 1), the insertion of the pigtail into the rectangular capillary is performed using the following steps:

[0012] Step 11): Slowly insert the end of the pigtail into the rectangular capillary tube at a speed of 3 cm / s.

[0013] Step 12): Fix the rectangular capillary tube and rotate the pigtail inside the rectangular capillary tube. The pigtail is rotated around its axis so that the rectangular capillary tube has rotational frictional resistance to the pigtail.

[0014] Furthermore, in step 1), the stereoscopic scanning method adopts the following formula (1):

[0015] (1);

[0016] (2);

[0017] (3);

[0018] In formula (1), The average roughness of the outer surfaces of the tail fiber and the rectangular capillary is given. The scanning directions for the average roughness of the outer surfaces of the pigtail and the rectangular capillary are the same; i is the index of the roughness of the outer surface of the pigtail being scanned, and n is the number of roughnesses on the outer surface of the pigtail being scanned. This is the aggregation of all roughnesses on the outer surface of the pigtail. It is the ratio of the number of times the roughness of the i-th pigtail outer surface appears among the n roughnesses to the total number of all n roughnesses on the pigtail outer surface; is a function of the average roughness of the outer surface of the pigtail fiber;

[0019] j represents the roughness index of the scanned rectangular capillary outer surface, and k represents the number of roughnesses scanned on the rectangular capillary outer surface. This represents the aggregation of all roughnesses on the outer surface of the rectangular capillary. It is the ratio of the number of times the roughness of the j-th rectangular capillary's outer surface appears among the k roughnesses to the total number of all k roughnesses on the outer surface of the rectangular capillary; is the average roughness function of the outer surface of the rectangular capillary;

[0020] In formula (2), Let be the smoothness roughness of the outer surface of the i-th pigtail, where the smoothness roughness is Ra < 0.2 mm. The aggregation of smoothness and roughness on the outer surface of all pigtails;

[0021] In formula (3), Let be the smoothness roughness of the outer surface of the i-th rectangular capillary, where the smoothness roughness is Ra < 0.2 mm. The sum of the smoothness and roughness of the outer surface of all rectangular capillaries;

[0022] When the average roughness Ra of the outer surface of the pigtail and the rectangular capillary is less than 0.2 mm, the model data of the pigtail and the rectangular capillary are scanned and collected using the ANSYS software with a stereo scanning method.

[0023] Optionally, in step 2), the end of the pigtail is subjected to simulated grinding, using the following steps:

[0024] Step 21): Cut the end of the pigtail using a rotary cutter, wherein coolant is sprayed onto the rotary cutter.

[0025] Step 22): Rotate the polishing disc to grind and polish the cut ends of the pigtails, making the end face of the cut pigtails smooth.

[0026] Furthermore, the deformation at the grinding point of the pigtail is analyzed using the following formula (4):

[0027] (4);

[0028] In formula (4), The surface of the fiber end at the grinding point is from room temperature. Increase to the temperature generated by friction The reciprocal of the logarithm of the surface viscosity, The area of ​​the fiber tail end after grinding;

[0029] The rate of change in the longitudinal direction of the fiber tip during the grinding process at the fiber tip. This refers to the longitudinal deformation length of the fiber tip during the grinding process. The original length of the fiber tip in the longitudinal direction before grinding;

[0030] The rate of change in the transverse direction of the fiber tip during the fiber tip grinding process. This refers to the lateral deformation length of the fiber tip during the grinding process. The original length of the fiber tip in the transverse direction before grinding; Let f be the rate of change function of the grinding point at the end of the pigtail during the grinding process, and let f be the deformation function of the area, longitudinal deformation length and transverse deformation length of the pigtail end after grinding.

[0031] Optionally, in step 3), after stopping the simulated grinding of the fiber tip, the following steps are performed:

[0032] Step 31): Spray coolant onto the end of the pigtail, wherein the temperature of the coolant is room temperature;

[0033] Step 32): Place the end of the pigtail in a mixture of ice and water at 0 degrees Celsius to cool for 25-30 minutes, allowing the end of the pigtail to be completely immersed in the cooling solution.

[0034] Optionally, in step 3), the tilt angle of the pigtail end after grinding is analyzed using the vector angle method, specifically as shown in the following formula (5):

[0035] (5);

[0036] In formula (5), This refers to the length of the fiber tip being ground per unit time. The direction is the longitudinal direction of the fiber tip during the grinding process. This is in the opposite direction to the longitudinal direction of the fiber tip during the grinding process. For impedance factor, Grinding time, This refers to the length of the fiber tip on the bevel after grinding. The angle at which the end of the pigtail is tilted after grinding.

[0037] Furthermore, in step 3), the following formula (6) is used to detect the pre-set tilt angle at which the end of the pigtail needs to be ground and the tilt angle after the pigtail end has been ground:

[0038] (6);

[0039] (7);

[0040] In formula (6), The tilt angle after grinding the end of the pigtail The angle at which the end of the pigtail needs to be ground is pre-set. difference;

[0041] In formula (7), 'a' is the offset coefficient caused by the temperature generated by friction. denoted as , where is the temperature generated by friction during the grinding of the fiber tip per unit time, and 'b' is the offset coefficient caused by deformation. This represents the deformation of the fiber tail end during grinding per unit time.

[0042] Optionally, in step 4), the MasterCAM software is input into the processing program, and the tilt angle of the end of the tail fiber after grinding is processed according to the processing program.

[0043] The beneficial effects of this invention are:

[0044] 1. This invention simulates the grinding of the fiber optic end by pre-setting the tilt angle to be ground within ANSYS software, analyzing the deformation at the grinding point, and stopping the simulated grinding of the fiber optic end. It then uses the vector angle method to analyze the tilt angle of the fiber optic end after grinding, comparing the pre-set tilt angle to be ground with the tilt angle after grinding, thereby reducing the deviation between the tilt angle of the ground fiber optic end face and the actual required tilt angle.

[0045] 2. The present invention compares or calibrates the difference between the tilt angle of the ground pigtail end and the pre-set tilt angle that the pigtail end needs to be ground, thereby reducing the deviation between the tilt angle of the ground pigtail end face and the actual required tilt angle of the pigtail end face. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 This is a schematic diagram of the process of the present invention;

[0048] Figure 2 This is a structural diagram of the present invention from the front view direction;

[0049] Figure 3 This is a side view of the structure of the present invention.

[0050] Icons: 1-Fiber tail, 2-Rectangular capillary, 3-Outer surface, 4-Bevel. Detailed Implementation

[0051] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0052] Example 1

[0053] like Figure 1 As shown, this embodiment provides a method for aligning the tilt angle of the beveled end face of a pigtail, including the following steps:

[0054] Step 1): As Figure 2 As shown, the pigtail 1 is inserted into the rectangular capillary tube 2, and the model data of the pigtail 1 and the rectangular capillary tube 2 are scanned and collected using the ANSYS software with a three-dimensional scanning method.

[0055] Step 2): In ANSYS software, pre-set the tilt angle at which the end of the pigtail 1 needs to be ground, perform simulated grinding on the end of the pigtail 1, and analyze the deformation at the grinding point of the pigtail 1.

[0056] Step 3): Stop the simulated grinding of the end of pigtail 1, use the vector angle method to analyze the tilt angle of the end of pigtail 1 after grinding, and detect the tilt angle of the end of pigtail 1 that needs to be ground before the preset tilt angle and the tilt angle of the end of pigtail 1 after grinding.

[0057] Step 4): Use MasterCAM software to process the tilt angle of the end of the pigtail 1 after grinding.

[0058] Optionally, in step 1), the insertion of the tail fiber 1 into the rectangular capillary tube 2 is performed using the following steps:

[0059] Step 11): Slowly insert the end of the pigtail 1 into the rectangular capillary tube 2, wherein the speed at which the end of the pigtail 1 is inserted into the rectangular capillary tube 2 is 3 cm / s.

[0060] Step 12): Fix the rectangular capillary tube 2 and rotate the tail fiber 1 inside the rectangular capillary tube 2. The tail fiber 1 is rotated around its axis so that the rectangular capillary tube 2 has rotational frictional resistance to the tail fiber 1. As long as the rectangular capillary tube 2 has rotational frictional resistance to the tail fiber 1, the gap between the tail fiber 1 and the rectangular capillary tube 2 is non-existent or negligible.

[0061] Furthermore, in step 1), the stereoscopic scanning method adopts the following formula (1):

[0062] (1);

[0063] (2);

[0064] (3);

[0065] In formula (1), The average roughness of the outer surfaces of the tail fiber 1 and the rectangular capillary tube 2 is given. The scanning directions for the average roughness of the outer surfaces of the tail fiber 1 and the rectangular capillary tube 2 are the same; i is the roughness number of the scanned outer surface of the tail fiber 1, and n is the number of roughnesses scanned on the outer surface of the tail fiber 1. This is the aggregation of all roughnesses on the outer surface of pigtail 1. The ratio of the number of times the roughness of the i-th pigtail 1 appears among the n roughnesses to the total number of all n roughnesses on the outer surface of pigtail 1. (This refers to the number of times the roughness on the outer surface of the i-th pigtail 1 appears among the n roughnesses); is the average roughness function of the outer surface of pigtail 1;

[0066] j represents the roughness index of the outer surface of the scanned rectangular capillary 2, and k represents the number of roughnesses on the outer surface of the scanned rectangular capillary 2. This represents the aggregation of all roughnesses on the outer surface of the rectangular capillary 2. The ratio of the number of times the roughness of the j-th rectangular capillary 2 appears among the k roughnesses to the total number of all k roughnesses on the outer surface of the rectangular capillary 2. (This is the number of times the roughness on the outer surface of the j-th rectangular capillary 2 appears among the k roughnesses); is the average roughness function of the outer surface of the rectangular capillary tube 2;

[0067] In formula (2), Let be the smoothness roughness of the outer surface of the i-th pigtail 1, where the smoothness roughness is Ra < 0.2 mm. The aggregation of the smoothness and roughness of the outer surface of all pigtail 1;

[0068] In formula (3), Let be the smoothness roughness of the outer surface of the i-th rectangular capillary 2, where the smoothness roughness is Ra < 0.2 mm. The aggregation of the smoothness roughness of the outer surface of all rectangular capillary tubes 2;

[0069] When the average roughness Ra of the outer surfaces of the pigtail 1 and the rectangular capillary 2 is less than 0.2 mm, the model data of the pigtail 1 and the rectangular capillary 2 are scanned and collected using the ANSYS software with a stereo scanning method.

[0070] Optionally, in step 2), the end of the pigtail 1 is subjected to simulated grinding, using the following steps:

[0071] Step 21): Cut the end of the pigtail 1 using a rotary cutter, wherein coolant is sprayed onto the rotary cutter.

[0072] Step 22): Rotate the polishing disc to grind and polish the end of the cut pigtail 1 to make the end face of the cut pigtail 1 smooth.

[0073] Furthermore, the deformation at the grinding point of the end of the pigtail 1 is analyzed using the following formula (4):

[0074] (4);

[0075] In Formula 4, The surface of the end of the braid 1 at the grinding point is at room temperature. Increase to the temperature generated by friction The reciprocal of the logarithm of the surface viscosity, The area of ​​the end of the tail fiber 1 after grinding is shown;

[0076] The rate of change of the grinding point at the end of the tail fiber (1) in the longitudinal direction at the end of the tail fiber 1 during the grinding process is given. The deformation length of the end of the tail fiber 1 in the longitudinal direction or axial direction during the grinding process. The original length of the end of the tail fiber 1 in the longitudinal direction before grinding;

[0077] The rate of change of the grinding point at the end of pigtail 1 in the transverse or cross-sectional direction at the end of pigtail 1 during the grinding process. This refers to the lateral deformation length of the end of fiber 1 during the grinding process. The original length of the end of the tail fiber 1 in the transverse direction before grinding; Let f be the rate of change function of the grinding point at the end of the pigtail 1 during the grinding process, and let f be the deformation function of the area, longitudinal deformation length and transverse deformation length of the end of the pigtail 1 after grinding.

[0078] Optionally, in step 3), after stopping the simulated grinding of the end of pigtail 1, the following steps are taken:

[0079] Step 31): Spray coolant onto the end of the pigtail 1, wherein the temperature of the coolant is room temperature;

[0080] Step 32): Place the end of the pigtail 1 in a mixture of ice and water at zero degrees Celsius to cool for 25-30 minutes, so that the end of the pigtail 1 is completely soaked in the cooling solution.

[0081] Optionally, in step 3), the tilt angle of the end of the pigtail 1 after grinding is analyzed using the vector angle method, specifically as shown in the following formula (5):

[0082] (5);

[0083] In formula (5), The length of the end of pigtail 1 being ground per unit time. The direction is the longitudinal direction of the end of the tail fiber 1 during the grinding process. This is in the opposite direction to the longitudinal direction of the end of the tail fiber 1 during the grinding process. The impedance factor (the length that hinders the grinding of the end of the pigtail 1 per unit time). (for length values) direction and The opposite direction - >1, For grinding time, such as Figure 3 shown The length of the end of the pigtail 1 on the beveled surface 4 after grinding, i.e., the length of the beveled surface 4 after the vertical plane is offset by R°. The angle of inclination of the end of the tail fiber 1 after grinding.

[0084] Furthermore, in step 3), the following formula (6) is used to detect the pre-set tilt angle at the end of the pigtail 1 to be ground and the tilt angle after grinding the end of the pigtail 1:

[0085] (6);

[0086] (7);

[0087] In formula (6), The tilt angle after grinding the end of the pigtail 1 The angle at which the end of the pre-set pigtail 1 needs to be ground difference;

[0088] In formula (7), 'a' is the offset coefficient caused by the temperature generated by friction. denoted as , where is the temperature generated by friction during the grinding of the end of pigtail 1 per unit time, and 'b' is the offset coefficient caused by deformation. The deformation of the end of the tail fiber 1 during grinding per unit time.

[0089] Optionally, in step 4), the MasterCAM software is input into the processing program, and the tilt angle of the end of the tail fiber 1 after grinding is processed according to the processing program.

[0090] Therefore, this embodiment uses the detection and comparison of the pre-set tilt angle of the end of the pigtail 1 to be ground and the tilt angle after grinding the end of the pigtail 1 to determine the alignment of the tilt angle of the pigtail bevel. That is, the alignment of this invention is calibration. Through calibration, the deviation between the tilt angle of the ground pigtail bevel and the actual required tilt angle of the pigtail bevel is reduced.

[0091] Example 2

[0092] Based on Embodiment 1, the present invention adds a rectangular capillary tube 2 to the end of the pigtail 1 to ensure that the inclined surface 4 of the pigtail 1 during grinding is perpendicular to the outer surface 3 of the rectangular capillary tube 2, and the axis of the pigtail 1 is parallel to the outer surface 3 of the rectangular capillary tube 2. This ensures that the inclination angle R° of the inclined surface 4 at the end of the pigtail 1 in the system is consistent with the design value, thereby ensuring that the coupling efficiency and return loss index of the inclined surface 4 at the end of the pigtail 1 in the system are improved.

[0093] A rectangular capillary tube 2 is installed at the end of the pigtail 1. The outer surface 3 of the rectangular capillary tube 2 is used to position the grinding direction of the inclined surface 4 at the end of the pigtail 1. By making the outer surface 3 of the rectangular capillary tube 2 flush with the reference surface of the system, the tilt angle R° of the end of the pigtail 1 in the system is consistent with the design value.

[0094] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope described in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for aligning the tilt angle of the beveled end face of a pigtail, characterized in that, Includes the following steps: Step 1): Insert the pigtail (1) into the rectangular capillary tube (2), and use ANSYS software to scan and collect model data of the pigtail (1) and the rectangular capillary tube (2) using the stereo scanning method. Step 2): In ANSYS software, the tilt angle that needs to be ground at the end of the pigtail (1) is preset, and the end of the pigtail (1) is simulated and ground to analyze the deformation at the grinding point of the pigtail (1). Step 3): Stop the simulated grinding of the end of the pigtail (1), use the vector angle method to analyze the tilt angle of the end of the pigtail (1) after grinding, and detect the tilt angle of the end of the pigtail (1) that needs to be ground and the tilt angle of the end of the pigtail (1) after grinding. In step 3), the tilt angle of the end of the tail fiber (1) after grinding is analyzed using the vector angle method, specifically as shown in the following formula (5): (5)； In formula (5), The length of the end of the tail fiber (1) being ground per unit time. The direction is the longitudinal direction of the end of the tail fiber (1) during the grinding process. The direction is reversed from the longitudinal direction of the end of the tail fiber (1) during the grinding process. For impedance factor, Grinding time, The length of the end of the tail fiber (1) on the bevel after grinding. The angle of inclination of the end of the tail fiber (1) after grinding; And, in step 3), the method for detecting the pre-set tilt angle of the end of the pigtail (1) to be ground and the tilt angle after grinding the end of the pigtail (1) is as follows: (6)； (7)； In formula (6), The tilt angle of the end of the tail fiber (1) after grinding The angle at which the end of the pre-set pigtail (1) needs to be ground difference; In formula (7), 'a' is the offset coefficient caused by the temperature generated by friction. denoted as , where is the temperature generated by friction during the grinding of the end of the pigtail (1) per unit time, and b is the offset coefficient caused by deformation. The deformation of the end of the tail fiber (1) during grinding per unit time; Step 4): Use MasterCAM software to process the tilt angle of the end of the pigtail (1) after grinding.

2. The method for aligning the tilt angle of the beveled end face of a pigtail according to claim 1, characterized in that, In step 1), the insertion of the tail fiber (1) into the rectangular capillary tube (2) is performed using the following steps: Step 11): Slowly insert the end of the tail fiber (1) into the rectangular capillary tube (2), wherein the speed at which the end of the tail fiber (1) is inserted into the rectangular capillary tube (2) is 3cm / s. Step 12): Fix the rectangular capillary tube (2) and rotate the tail fiber (1) inside the rectangular capillary tube (2). The tail fiber (1) is rotated around its axis so that the rectangular capillary tube (2) has rotational frictional resistance to the tail fiber (1).

3. The method for aligning the tilt angle of the beveled end face of a pigtail according to claim 1, characterized in that, In step 1), the stereoscopic scanning method uses the following formula (1): (1)； (2)； (3)； In formula (1), The average roughness of the outer surfaces of the tail fiber (1) and the rectangular capillary (2) is given. The scanning directions for the average roughness of the outer surfaces of the pigtail (1) and the rectangular capillary (2) are the same; i is the number of the roughness of the outer surface of the pigtail (1) being scanned, and n is the number of roughnesses on the outer surface of the pigtail (1) being scanned. The aggregation of all roughnesses on the outer surface of the pigtail (1), It is the ratio of the number of times the roughness of the outer surface of the i-th pigtail (1) appears among the n roughnesses to the total number of all n roughnesses on the outer surface of the pigtail (1); Let be the average roughness function of the outer surface of the pigtail (1); j is the roughness number of the outer surface of the scanned rectangular capillary (2), and k is the number of roughnesses on the outer surface of the scanned rectangular capillary (2). The sum of all roughnesses on the outer surface of the rectangular capillary (2) The ratio of the number of times the roughness of the j-th rectangular capillary (2) appears among the k roughnesses to the total number of all k roughnesses on the outer surface of the rectangular capillary (2); Let be the average roughness function of the outer surface of the rectangular capillary (2); In formula (2), Let be the smoothness roughness of the outer surface of the i-th pigtail (1), wherein the smoothness roughness is Ra < 0.2 mm. The aggregation of the smoothness and roughness of the outer surface of all pigtails (1); In formula (3), Let be the smoothness roughness of the outer surface of the i-th rectangular capillary (2), wherein the smoothness roughness is Ra < 0.2 mm. The aggregation of the smoothness roughness of the outer surface of all rectangular capillaries (2); When the average roughness Ra of the outer surface of the pigtail (1) and the rectangular capillary (2) is less than 0.2 mm, the model data of the pigtail (1) and the rectangular capillary (2) are scanned and collected by the stereo scanning method using the ANSYS software.

4. The method for aligning the tilt angle of the beveled end face of a pigtail according to claim 1, characterized in that, In step 2), the end of the pigtail (1) is subjected to simulated grinding, using the following steps: Step 21): Cut the end of the pigtail (1) using a rotary cutter, wherein coolant is sprayed onto the rotary cutter; Step 22): Rotate the polishing disc to grind and polish the end of the cut pigtail (1) so that the end face of the cut pigtail (1) is smooth.

5. The method for aligning the tilt angle of the beveled end face of a pigtail according to claim 4, characterized in that, The deformation at the grinding point of the end of the tail fiber (1) is analyzed using the following formula (4): (4)； In formula (4), The surface of the end of the braided fiber (1) at the grinding point is at room temperature. Increase to the temperature generated by friction The reciprocal of the logarithm of the surface viscosity, The area of ​​the end of the tail fiber (1) after grinding is shown; The rate of change of the grinding point at the end of the tail fiber (1) in the longitudinal direction at the end of the tail fiber (1) during the grinding process is given. The deformation length of the end of the tail fiber (1) in the longitudinal direction during the grinding process is denoted as . The original length of the end of the tail fiber (1) in the longitudinal direction before grinding; The rate of change in the transverse direction of the end of the tail fiber (1) during the grinding process at the end of the tail fiber (1) is given by the grinding point at the end of the tail fiber (1). The deformation length of the end of the tail fiber (1) in the transverse direction during the grinding process. The original length of the end of the tail fiber (1) in the transverse direction before grinding; is the rate of change function of the end grinding point of the tail fiber (1) during the grinding process of the end of the tail fiber (1), and f is the deformation function of the area, longitudinal deformation length and transverse deformation length of the end of the tail fiber (1) after being ground at the grinding point.

6. The method for aligning the tilt angle of the beveled end face of a pigtail according to claim 1, characterized in that, In step 3), after stopping the simulated grinding of the end of the pigtail (1), the following steps are taken: Step 31): Spray coolant onto the end of the pigtail (1), wherein the temperature of the coolant is room temperature; Step 32): Place the end of the pigtail (1) in a mixture of ice and water at zero degrees Celsius for 25-30 minutes to cool it down, so that the end of the pigtail (1) is completely soaked in the cooling solution.

7. The method for aligning the tilt angle of the beveled end face of a pigtail according to claim 1, characterized in that, In step 4), the MasterCAM software is input into the processing program, and the tilt angle of the end of the tail fiber (1) after grinding is processed according to the processing program.

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