Low defect torsion system and method
Through multi-stage torsion and temperature control methods, the defects caused by the fiber wire deformation and concentration during the torsion process of fiber inverter are solved, low defect torsion is achieved, and the imaging quality of the fiber inverter is improved.
Patent Information
- Application Number
- CN202510520454.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-24
- Publication Date
- 2025-08-08
AI Technical Summary
During the twisting process of existing fiber inverters, the deformation of the fiber wire is concentrated in the middle, resulting in defects such as grid and loss of resolution.
The multi-stage torsion method is used to divide the inverter into multiple torsion zones, and gradually twist it through multiple torsion furnaces to control the temperature and angle of each torsion to reduce the deformation of the fiber wire.
The elongation deformation of the fiber wire after torsion is significantly reduced, the black mesh ratio is reduced, the resolution disappearance is improved, and the edge transmittance is improved.
Smart Images
Figure CN120447132A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of optical fiber image transmission elements, and in particular to a low-defect torsion system and method. Background Art
[0002] The fiber optic image inverter is a device that inverts the image by twisting the fiber filaments 180° through a twisting process. The twisting process causes the fibers to stretch and deform, which can cause defects such as grids and loss of resolution.
[0003] The existing twisting method is that the two ends of the image invertor blank are grasped by mechanical devices, and the middle is heated to the softening temperature by a twisting furnace with a narrow high-temperature zone. The image of the image invertor is reversed by rotating the two mechanical devices 180 degrees. This twisting method involves a single twisting zone 1. The middle of the twisting zone of this method is the deformation concentration zone, which is the area with the greatest fiber deformation, such as Figure 1 shown. Summary of the Invention
[0004] In view of this, the main purpose of the present invention is to provide a low-defect torsion system and method, and the problem to be solved is to achieve low-defect torsion by reducing the fiber deformation in the deformation concentration area in the middle of the torsion zone.
[0005] The purpose of the present invention and the technical problem solved are achieved by adopting the following technical solutions. The present invention proposes a low-defect torsion method, comprising the following steps:
[0006] The two ends of the image inverter are fixed, and the image inverter is twisted in multiple sections to obtain multiple twist zones.
[0007] The purpose of the present invention and the solution to its technical problems can be further achieved by adopting the following technical measures.
[0008] Preferably, in the aforementioned low-defect twisting method, the twisting angles of the multiple twisting zones total 180°.
[0009] Preferably, in the aforementioned low-defect twisting method, the temperature of the multiple twisting stages is 200-300°C.
[0010] Preferably, in the aforementioned low-defect twisting method, the multi-stage twisting is greater than or equal to two stages.
[0011] Preferably, the aforementioned low-defect torsion method, wherein the low-defect torsion method comprises the following steps:
[0012] Step 1: heating and twisting in a first twisting furnace;
[0013] Step 2: The first torsion furnace is torsion-finished and cooled;
[0014] Step 3: heating and twisting in the second twisting furnace;
[0015] Step 3: The second torsion furnace is torsion-finished and cooled;
[0016] …………
[0017] In step n, the nth twisting furnace heats up and twists, and the n heating furnaces cool down to room temperature at the same time to complete the twisting.
[0018] Preferably, the aforementioned low-defect torsion method, wherein the low-defect torsion method comprises the following steps:
[0019] S1 fixes both ends of the image invertor and heats up the two torsion furnaces to the preparation temperature;
[0020] The S2 torsion furnace is heated to the torsion temperature. At this time, the mechanical devices at both ends of the image invertor begin to rotate relative to each other. When the relative rotation angle of the mechanical devices at both ends reaches 90°, the relative rotation stops. At this time, the two ends rotate synchronously. The torsion furnace is cooled down to the preparation temperature. The torsion furnace is heated up to the torsion temperature. After the torsion furnace is cooled down, the torsion furnace is heated up to the torsion temperature. When the torsion furnace is heated up to the torsion temperature, the mechanical devices at both ends begin to rotate relative to each other again. When the rotation angle reaches 90° again, the relative rotation stops. At this time, the two ends rotate synchronously. The torsion furnace is cooled down to the preparation temperature. The two ends stop rotating. The two heating furnaces are cooled down to room temperature at the same time to complete the torsion.
[0021] Preferably, in the aforementioned low-defect twisting method, in step S1, the preparation temperature is 200-300°C.
[0022] Preferably, in the aforementioned low-defect twisting method, in step S2, the twisting temperature is 600-800°C.
[0023] Preferably, in the aforementioned low-defect torsion method, in step S2, the mechanical device is a rotatable clamp.
[0024] The purpose of the present invention and the solution to its technical problems can also be achieved by adopting the following technical solutions: The present invention proposes a low-defect torsion system, which includes at least one torsion furnace.
[0025] The purpose of the present invention and the solution to its technical problems can be further achieved by adopting the following technical measures.
[0026] Preferably, in the aforementioned low-defect torsion system, the torsion furnace is an electromagnetic induction heating furnace or a silicon-molybdenum rod heating furnace.
[0027] Preferably, in the aforementioned low-defect torsion system, the number of the torsion furnaces is greater than or equal to two.
[0028] By means of the above technical solution, the low-defect torsion system and method provided by the present invention have at least the following advantages:
[0029] The low-defect torsion system and method described in the present invention has a torsion angle of the optical fiber yarn in each torsion zone that is smaller than the 180° in the single torsion zone in the prior art. The degree of elongation and deformation of the optical fiber yarn is correspondingly reduced, and torsion defects such as black mesh are greatly reduced. The proportion of black mesh and small mesh after torsion can be reduced, the resolution disappearance is improved, and the edge transmittance is increased.
[0030] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] Figure 1 Schematic diagram of the twisting completed by the single twisting technology of the prior art;
[0032] Figure 2 This is a schematic diagram of torsion using two torsion furnaces as an example according to Example 1 of the present invention;
[0033] Figure 3 This is a schematic diagram of the two torsion zones after torsion is completed in Example 1 of the present invention;
[0034] Figure 4 A flowchart of a multi-torsion zone method according to some embodiments of the present invention;
[0035] Among them, 1 is single torsion zone; first torsion furnace - 2; second torsion furnace - 3; first torsion zone - 4; second torsion zone - 5. DETAILED DESCRIPTION
[0036] To further illustrate the technical means and effectiveness of the present invention in achieving its intended objectives, the following describes in detail the specific implementation, structure, features, and effectiveness of the low-defect torsion system and method proposed in accordance with the present invention, in conjunction with preferred embodiments. In the following description, different references to "one embodiment" or "embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.
[0037] The following materials or reagents, unless otherwise specified, were commercially available.
[0038] like Figure 4 As shown, some embodiments of the present invention provide a low-defect torsion method, comprising the following steps:
[0039] The two ends of the image invertor are fixed and the image invertor is twisted in multiple sections to obtain multiple twist zones. The above-mentioned image invertor is an optical image transmission device composed of a large number of optical fiber filaments melted together, which can invert the image 180 degrees and has the characteristics of optical thickness of zero and high resolution.
[0040] In some optional embodiments, the twist angles of the multiple twist zones total 180°. The total of 180° is because the image invertor is used to invert the image by 180°, and twisting is the process of inverting the image, so the twist zones total 180°.
[0041] Taking into account the problem of resolution loss and black screen in one-segment twisting, in some optional embodiments, the plurality of segments of twisting are designed to be greater than or equal to two segments.
[0042] In some optional embodiments, the temperature of the multiple twisting stages is 600-800° C. If the twisting temperature is lower than 600° C., the twisting temperature is too low to prevent twisting; if the twisting temperature is higher than 800° C., the twisting temperature is too high to cause deformation.
[0043] In some optional embodiments, the low-defect torsion method comprises the following steps:
[0044] Step 1: heating and twisting in a first twisting furnace;
[0045] Step 2: The first torsion furnace is torsion-finished and cooled;
[0046] Step 3: heating and twisting in the second twisting furnace;
[0047] Step 3: The second torsion furnace is torsion-finished and cooled;
[0048] …………
[0049] In step n, the nth twisting furnace heats up and twists, and the n heating furnaces cool down to room temperature at the same time to complete the twisting.
[0050] In specific implementation, the low-defect torsion method may include the following steps:
[0051] S1 fixes both ends of the image invertor, and the two torsion furnaces are electromagnetic induction heating furnaces, which are heated to a preparation temperature of 200-300°C;
[0052] S2 The first twisting furnace is heated to the twisting temperature. At this time, the mechanical devices at both ends of the image invertor begin to rotate relative to each other. When the relative rotation angle of the mechanical devices at both ends reaches 10°-170°, the relative rotation stops. When it is lower than 10°, the rotation speed is too low, the twisting time is too long, and the deformation increases. When it is higher than 170°, the rotation speed is too high, which easily causes the multifilament to break. At this time, the two ends rotate synchronously. The first twisting furnace is cooled to the preparation temperature, and the second twisting furnace is heated to the twisting temperature. After the first twisting furnace is cooled, the second twisting furnace is heated to the twisting temperature. The mechanical devices at both ends start to rotate relative to each other again. When the rotation angle reaches 90° again, the relative rotation stops. At this time, the two ends rotate synchronously. The second twisting furnace is cooled to the preparation temperature. The two ends stop rotating. The two heating furnaces are cooled to room temperature at the same time to complete the twisting. The mechanical device is any fixture in the field that can rotate the image invertor.
[0053] In specific implementation, the low-defect torsion method may include the following steps:
[0054] S1 fixes the two ends of the image invertor, and the three torsion furnaces are electromagnetic induction heating furnaces, which are heated to a preparation temperature of 200-300℃;
[0055] S2 The first twisting furnace is heated to the twisting temperature. At this time, the mechanical devices at both ends of the image invertor start to rotate relative to each other. When the relative rotation angle of the mechanical devices at both ends reaches 10°-170°, the relative rotation stops. When it is lower than 10°, the speed is too low and the twisting time is too long, resulting in increased deformation; when it is higher than 170°, the speed is too high, which easily causes the multifilament to break. At this time, the two ends rotate synchronously, the first twisting furnace is cooled to the preparation temperature, and the second twisting furnace is heated to the twisting temperature. After the first twisting furnace is cooled down and the second twisting furnace is heated up to the twisting temperature, the mechanical devices at both ends start to rotate relative to each other again. When the rotation angle reaches 90° again, they stop rotating relative to each other. At this time, the two ends rotate synchronously, the second twisting furnace is cooled down to the preparation temperature, and the third twisting furnace is heated up to the twisting temperature. After the second twisting furnace is cooled down and the third twisting furnace is heated up to the twisting temperature, the rotatable clamps at both ends start to rotate relative to each other again. When the rotation angle reaches 60° again, they stop rotating relative to each other. At this time, the two ends rotate synchronously, the third twisting furnace is cooled down to the preparation temperature, and the two ends stop rotating. The three heating furnaces are cooled down to room temperature at the same time, and the twisting is completed. The mechanical device is any rotatable fixture in the art that can rotate the image invertor.
[0056] In some optional embodiments, the torsion temperature is 600-800° C., which is related to the material of the image invertor. When it is lower than 600° C., the torsion temperature is too low to be able to be twisted; when it is higher than 800° C., the torsion temperature is too high to cause deformation.
[0057] Some embodiments of the present invention also provide a low-defect torsion system comprising at least one torsion furnace.
[0058] In some optional embodiments, the torsion furnace is an electromagnetic induction heating furnace or a silicon-molybdenum rod heating furnace. Compared to silicon-molybdenum rod heating furnaces, electromagnetic induction heating furnaces heat up faster and the temperature range is easier to control. Specifically, the torsion furnace can be an electromagnetic induction heating furnace with a torsion temperature of 600-800°C. Below 600°C, the torsion temperature is too low to allow the torsion to proceed; above 800°C, the torsion temperature is too high, resulting in deformation.
[0059] In some preferred embodiments, the number of the torsion furnaces is greater than or equal to two, which can reduce defects such as black screens and loss of resolution. In this case, the two or more torsion furnaces are arranged in sequence.
[0060] In the above technical solution, the present invention can improve resolution loss and grid defects by increasing the number of furnaces or setting multiple torsion zones. Black grid and resolution loss are defects of the image invertor, affecting the imaging effect. The ratio is the ratio of those with corresponding defects.
[0061] The specific implementation methods of the present invention are further described in detail below in conjunction with the examples, but they should not be understood as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made to the present invention by technicians in this field based on the above-mentioned contents of the present invention still fall within the scope of protection of the present invention.
[0062] Unless otherwise specified, the materials and reagents mentioned below are commercially available products familiar to those skilled in the art. Unless otherwise specified, the methods described are all well-known methods in the art. Unless otherwise defined, technical or scientific terms used shall have the same meanings as those commonly understood by those skilled in the art.
[0063] In the following embodiments and comparative examples, when observing the end face of the image inverter under a 10x microscope, grid-like black lines are observed, which are black grids; when observing the imaging effect of the edge of the image inverter with a 10x projector, blurring means loss of resolution.
[0064] Example 1
[0065] Take two torsion furnaces as an example. Figure 2 , Figure 3 The two ends of the image invertor are fixed with rotatable clamps, and the two torsion furnaces are electromagnetic induction heating furnaces, which are heated to a preparation temperature of 220°C. The first torsion furnace 2 is heated to a torsion temperature of 720°C. At this time, the rotatable clamps at both ends of the image invertor begin to rotate relative to each other, with a speed of 20 revolutions per minute at one end and 10 revolutions per minute at the other end, and a relative speed of 10 revolutions per minute. When the relative rotation angle of the rotatable clamps at both ends reaches 90°, the relative rotation stops. The synchronous rotation speed of the two ends at this time is 20 revolutions per minute. The first torsion furnace 2 is cooled to a preparation temperature of 220°C. The second torsion furnace 3 is heated to a torsion temperature of 720°C. After the first torsion furnace 2 is cooled, the second torsion furnace 3 is heated to a torsion temperature of 720°C. The rotatable clamps at both ends begin to rotate relative to each other again, with a speed of 20 revolutions per minute at one end and 10 revolutions per minute at the other end, and a relative speed of 10 revolutions per minute. When the rotation angle reaches 90° again, the relative rotation stops. The synchronous rotation of the two ends at this time is 20 revolutions per minute. The second torsion furnace 3 is cooled to the preparation temperature, and both ends stop rotating. The two heating furnaces are cooled to room temperature at the same time to complete the torsion, and the first torsion zone 4 and the second torsion zone 5 are obtained respectively.
[0066] By using the method of this embodiment for twisting, it was tested that the black grid ratio of the image invertor was 1.2%, and the resolution loss ratio was 1.5%.
[0067] Example 2
[0068] The difference between this embodiment and embodiment 1 is that three torsion furnaces are provided.
[0069] Fix the two ends of the image inverter with rotatable clamps. The three torsion furnaces are electromagnetic induction heating furnaces. Heat the three torsion furnaces to the preparation temperature of 220℃. The first torsion furnace is heated to the torsion temperature of 720℃. At this time, the rotatable clamps at both ends of the image inverter begin to rotate relative to each other, with a speed of 20 revolutions per minute at one end and 10 revolutions per minute at the other end, and a relative speed of 10 revolutions per minute. When the relative rotation angle of the rotatable clamps at both ends reaches 60°, the relative rotation is stopped. The synchronous rotation speed of the two ends at this time is 20 revolutions per minute. The first torsion furnace is cooled to the preparation temperature of 220℃, and the second torsion furnace is heated to the torsion temperature of 720℃. After the first torsion furnace is cooled, the second torsion furnace is heated to the torsion temperature of 720℃, and the rotatable clamps at both ends begin to rotate relative to each other again, with a speed of 20 revolutions per minute at one end and 10 revolutions per minute at the other end, and a relative speed of 10 revolutions per minute. When the rotation angle reaches 60° again, the relative rotation speed is stopped. When it reaches 60°, the relative rotation is stopped. The two ends rotate synchronously at a speed of 20 revolutions per minute. The second torsion furnace is cooled to the preparation temperature of 220°C, and the third torsion furnace is heated to the torsion temperature of 720°C. When the second torsion furnace is cooled down and the third torsion furnace is heated to the torsion temperature of 720°C, the rotatable clamps at both ends start to rotate relative to each other again, with a speed of 20 revolutions per minute at one end and 10 revolutions per minute at the other end, and the relative speed is 10 revolutions per minute. When the rotation angle reaches 60° again, the relative rotation is stopped. The two ends rotate synchronously at this time with a speed of 20 revolutions per minute. The third torsion furnace is cooled to the preparation temperature of 220°C, and the two ends stop rotating. The three heating furnaces are cooled to room temperature at the same time to complete the torsion, and the first torsion zone, the second torsion zone and the third torsion zone are obtained respectively.
[0070] By using the method of this embodiment for twisting, it was found through testing that the black grid ratio of the image invertor was 1% and the resolution loss ratio was 0%.
[0071] Example 3
[0072] The difference between this embodiment and embodiment 1 is that four torsion furnaces are provided.
[0073] The two ends of the image invertor are fixed with rotatable clamps. The four torsion furnaces are electromagnetic induction heating furnaces, and the temperature of the four torsion furnaces is raised to a preparation temperature of 220°C. The first torsion furnace is heated to a torsion temperature of 720°C. At this time, the rotatable clamps at both ends of the image invertor begin to rotate relative to each other, with a speed of 20 revolutions per minute at one end and 10 revolutions per minute at the other end, and a relative speed of 10 revolutions per minute. When the relative rotation angle of the rotatable clamps at both ends reaches 45°, the relative rotation is stopped. The synchronous rotation speed of the two ends at this time is 20 revolutions per minute. The first torsion furnace is cooled to a preparation temperature of 220°C. The second torsion furnace is heated to a torsion temperature of 720°C. After the first torsion furnace is cooled, the second torsion furnace is heated to a torsion temperature of 720°C. The rotatable clamps at both ends begin to rotate relative to each other again, with a speed of 20 revolutions per minute at one end and 10 revolutions per minute at the other end, and a relative speed of 10 revolutions per minute. When the rotation angle reaches 45° again, the relative rotation is stopped. The synchronous rotation speed of the two ends at this time is 20 revolutions per minute. The second torsion furnace is cooled to a preparation temperature of 220°C. The third torsion furnace is heated to a torsion temperature of 720°C. After the second torsion furnace is cooled, the third torsion furnace is heated to a torsion temperature of 720°C. When the temperature is raised to the torsion temperature of 720℃, the rotatable clamps at both ends start to rotate relative to each other again, with a speed of 20 revolutions per minute at one end and 10 revolutions per minute at the other end, and a relative speed of 10 revolutions per minute. When the rotation angle reaches 45° again, the relative rotation is stopped. The two ends rotate synchronously at this time, with a speed of 20 revolutions per minute. The third torsion furnace is cooled to the preparation temperature of 220℃, and the fourth torsion furnace is heated to the torsion temperature of 720℃. After the third torsion furnace is cooled, the fourth torsion furnace is heated to the torsion temperature of 720℃, and the rotatable clamps at both ends start to rotate relative to each other again, with a speed of 20 revolutions per minute at one end and 10 revolutions per minute at the other end, and a relative speed of 10 revolutions per minute. When the rotation angle reaches 45° again, the relative rotation is stopped. The two ends rotate synchronously at this time, with a speed of 20 revolutions per minute. The fourth torsion furnace is cooled to the preparation temperature of 220℃, and the two ends stop rotating. The four heating furnaces are cooled to room temperature at the same time to complete the torsion, and the first torsion zone, the second torsion zone, the third torsion zone and the fourth torsion zone are obtained respectively.
[0074] By using the method of this embodiment for twisting, it was found through testing that the black grid ratio of the image invertor was 2%, and the resolution loss ratio was 1%.
[0075] Example 4
[0076] The difference between this embodiment and embodiment 1 is that only one torsion furnace is provided.
[0077] The image invertor is fixed at both ends with rotatable fixtures. The torsion furnace is an electromagnetic induction heating furnace and is heated to a preparation temperature of 220°C. The first torsion furnace is heated to a torsion temperature of 720°C. At this time, the rotatable fixtures at both ends of the image invertor begin to rotate relative to each other, with one end rotating at 20 revolutions per minute and the other end rotating at 10 revolutions per minute, with a relative speed of 10 revolutions per minute. The relative rotation is stopped when the relative rotation angle of the rotatable fixtures at both ends reaches 90°. The synchronous rotation speed of the two ends is now 20 revolutions per minute. The first torsion furnace is cooled to the preparation temperature of 220°C. The torsion furnace is moved 5mm in the axial direction and then heated to a torsion temperature of 720°C. At this time, the rotatable fixtures at both ends of the image invertor begin to rotate relative to each other, with one end rotating at 20 revolutions per minute and the other end rotating at 10 revolutions per minute, with a relative speed of 10 revolutions per minute. The relative rotation is stopped when the relative rotation angle of the rotatable fixtures at both ends reaches 90°. The synchronous rotation speed of the two ends is now 20 revolutions per minute. The first torsion furnace is cooled to room temperature, completing the torsion and obtaining the first torsion zone.
[0078] By using the twisting method of this embodiment, it was tested that the black grid ratio of the image invertor was 1.5%, and the resolution loss ratio was 1%.
[0079] Example 5
[0080] The difference between this embodiment and embodiment 4 is that the rotation speed is changed to 30 rpm.
[0081] The image invertor is fixed at both ends with rotatable fixtures. The torsion furnace is an electromagnetic induction heating furnace and is heated to a preparation temperature of 220°C. The first torsion furnace is heated to a torsion temperature of 720°C. At this time, the rotatable fixtures at both ends of the image invertor begin to rotate relative to each other, with one end rotating at a speed of 30 revolutions per minute and the other end rotating at 20 revolutions per minute, with a relative speed of 10 revolutions per minute. When the relative rotation angle of the rotatable fixtures at both ends reaches 90°, the relative rotation stops. The synchronous rotation speed of the two ends is now 30 revolutions per minute. The first torsion furnace is cooled to the preparation temperature of 220°C. The torsion furnace is moved 5mm along the axial direction and then heated to a torsion temperature of 720°C. At this time, the rotatable fixtures at both ends of the image invertor begin to rotate relative to each other, with one end rotating at a speed of 30 revolutions per minute and the other end rotating at 20 revolutions per minute, with a relative speed of 10 revolutions per minute. When the relative rotation angle of the rotatable fixtures at both ends reaches 90°, the relative rotation stops. The synchronous rotation speed of the two ends is now 20 revolutions per minute. The first torsion furnace is cooled to room temperature, and the torsion is completed.
[0082] By using the method of this embodiment for twisting, it was found through testing that the black grid ratio of the image invertor was 3%, and the resolution loss ratio was 2%.
[0083] Comparative Example 1
[0084] The image invertor is fixed at both ends with rotatable fixtures. The torsion furnace is an electromagnetic induction heating furnace. The two torsion furnaces are heated to a preparation temperature of 220°C. When the torsion furnace is heated to a torsion temperature of 720°C, the rotatable fixtures at both ends of the image invertor begin to rotate relative to each other, at a speed of 20 revolutions per minute on one end and 10 revolutions per minute on the other end, with a relative speed of 10 revolutions per minute. When the relative rotation angle of the rotatable fixtures at both ends reaches 180°, the relative rotation stops. The synchronous rotation speed at both ends is now 20 revolutions per minute. The torsion furnace is cooled to the preparation temperature of 220°C. At this time, the rotation of both ends stops, and the torsion furnace is cooled to room temperature, and the torsion is completed.
[0085] By using the twisting method of this comparative example, after testing, the black grid ratio of the image invertor was 10%, the resolution loss ratio was 15%, and the unqualified rate after twisting was 25%.
[0086] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.
[0087] The numerical ranges described in the present invention include all values within the range, and include range values formed by any two values within the range. Different numerical values of the same indicator appearing in all embodiments of the present invention can be arbitrarily combined to form a range value.
[0088] The technical features in the claims and / or the specification of the present invention may be combined, and the manner of combination is not limited to the combination obtained by reference in the claims. The technical solutions obtained by combining the technical features in the claims and / or the specification are also within the scope of protection of the present invention.
[0089] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiment based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.
Claims
1. A low-defect twisting method, characterized in that: The following steps are involved: The two ends of the image inverter are fixed, and the image inverter is twisted in multiple sections to obtain multiple twist zones.
2. The low-defect twisting method according to claim 1, characterized in that: The torsion angles of the multiple torsion zones total 180°.
3. The low-defect twisting method according to claim 1, characterized in that: The temperature of the multiple twisting stages is 200-300°C.
4. The low-defect twisting method according to claim 1, characterized in that: The multi-stage twisting is greater than or equal to two stages.
5. The low-defect twisting method according to claim 1, characterized in that: The low-defect torsion method comprises the following steps: Step 1: heating and twisting in a first twisting furnace; Step 2: The first torsion furnace is torsion-finished and cooled; Step 3: heating and twisting in the second twisting furnace; Step 3: The second torsion furnace is torsion-finished and cooled; ………… In step n, the nth twisting furnace heats up and twists, and the n heating furnaces cool down to room temperature at the same time to complete the twisting.
6. The low-defect twisting method according to claim 5, characterized in that: The low-defect torsion method comprises the following steps: S1 fixes both ends of the image invertor and heats up the two torsion furnaces to the preparation temperature; The S2 torsion furnace is heated to the torsion temperature. At this time, the mechanical devices at both ends of the image invertor begin to rotate relative to each other. When the relative rotation angle of the mechanical devices at both ends reaches 90°, the relative rotation stops. At this time, the two ends rotate synchronously. The torsion furnace is cooled down to the preparation temperature. The torsion furnace is heated up to the torsion temperature. After the torsion furnace is cooled down, the torsion furnace is heated up to the torsion temperature. When the torsion furnace is heated up to the torsion temperature, the mechanical devices at both ends begin to rotate relative to each other again. When the rotation angle reaches 90° again, the relative rotation stops. At this time, the two ends rotate synchronously. The torsion furnace is cooled down to the preparation temperature. The two ends stop rotating. The two heating furnaces are cooled down to room temperature at the same time to complete the torsion.
7. The low-defect twisting method according to claim 6, characterized in that: In step S1, the preparation temperature is 200-300°C.
8. The low-defect twisting method according to claim 6, characterized in that: In step S2, the torsion temperature is 600-800°C; and the mechanical device is a rotatable clamp.
9. A low-defect torsion system, characterized in that: It comprises at least one torsion furnace.
10. The low defect torsion system according to claim 9, characterized in that The torsion furnace is an electromagnetic induction heating furnace or a silicon-molybdenum rod heating furnace; the number of the torsion furnaces is greater than or equal to two.