Preform rod bending detection device, correction system and correction method

Abstract

The present invention relates to a preform rod bending detection device, correction system and correction method, the device comprises: a first detection assembly comprising a first laser emitter and a first laser receiver, the first laser emitter emits a first light beam along a first linear direction, the first laser receiver is used for receiving the first light beam, and the first laser receiver is used for receiving a second light beam along a second linear direction; the first laser transmitter and the first laser receiver are arranged on the two sides of the reference axis in the radial direction, and the reference axis is perpendicular to the first linear direction and the second linear direction and located in a light path of the first light beam; the second detection assembly comprises a second laser emitter and a second laser receiver, the second laser emitter is used for emitting a second light beam in the second linear direction, the second laser receiver is used for receiving the second light beam, and the second laser emitter and the second laser receiver are arranged on the two sides of the reference axis in the radial direction; the reference axis is located in a light path of the second light beam. According to the invention, accurate detection of the bending direction and the bending degree of the handle bar to be detected can be realized.

Description

Technical Field

[0001] The invention relates to the field of optical fiber preform processing technology, and in particular to a preform bending detection device, a correction system and a correction method. Background Art

[0002] During the manufacturing process of optical fiber preform, after the OVD sintering process to dehydrate and high-temperature sintering into a transparent optical fiber preform, it is necessary to perform operations in the front-end processing process to heat and soften the lower part of the preform into a cone to facilitate customers to draw optical fibers.

[0003] During the sintering process, the lower handle bar will bend relative to the main body of the preform rod as the preform rod shrinks and becomes transparent. After the preform rod reaches the front end processing process, the lower chuck of the front end processing equipment will easily break the lower handle bar when clamping the lower handle bar that has been bent too much.

[0004] Therefore, it is necessary to detect the degree of bending of the handle bar before the lower chuck of the front processing equipment clamps the handle bar so as to perform correction processing. Summary of the invention

[0005] Based on the above description, the present invention provides a preform rod handle bending detection device, correction system and correction method to detect the bending degree of the handle before the lower chuck of the front processing equipment clamps the handle, and correct the bent handle.

[0006] The technical solution of the present invention to solve the above technical problems is as follows:

[0007] In a first aspect, the present application provides a preform rod handle bending detection device, and the technical solution adopted is as follows:

[0008] A preform rod handle bending detection device, comprising:

[0009] A first detection component, comprising a first laser transmitter and a first laser receiver, wherein the first laser transmitter is used to emit a first light beam along a first straight line direction, and the first light beam has a set width in a second straight line direction perpendicular to the first straight line direction, and the first laser receiver is used to receive the first light beam, and the first laser transmitter and the first laser receiver are arranged on both sides of a reference axis in a radial direction, and the reference axis is perpendicular to both the first straight line direction and the second straight line direction and is located in an optical path of the first light beam;

[0010] A second detection component, comprising a second laser transmitter and a second laser receiver, wherein the second laser transmitter is used to emit a second light beam along a second straight line direction, and the second light beam has a set width in the first straight line direction, and the second laser receiver is used to receive the second light beam, and the second laser transmitter and the second laser receiver are arranged on both sides of a reference axis in a radial direction, and the reference axis is located in an optical path of the second light beam;

[0011] Among them, a standard handle rod whose axis coincides with the axis of the preform rod is located in the optical path of the first light beam and the second light beam, and when the axis of the standard handle rod coincides with the reference axis, the first light beam and the second light beam are partially blocked by the standard handle rod, which is suitable for placing the handle rod to be tested in the optical path of the first light beam and the second light beam, and making the axis of the preform rod connected to the handle rod to be tested coincide with the reference axis, and judging whether the handle rod to be tested is bent relative to the preform rod in the second straight line direction according to the comparison result of the width data of the first light beam blocked by the handle rod to be tested received by the first laser receiver and the corresponding reference parameter, and judging whether the handle rod to be tested is bent relative to the preform rod in the first straight line direction according to the comparison result of the width data of the second light beam blocked by the handle rod to be tested received by the second laser receiver and the corresponding reference parameter.

[0012] Preferably, the width of the first light beam in the second straight line direction and the width of the second light beam in the first straight line direction are not less than the diameter of the handle.

[0013] Preferably, the reference axis is equidistant from both side boundaries of the first light beam in the second straight line direction, and is equidistant from both side boundaries of the second light beam in the first straight line direction.

[0014] In a second aspect, the present application provides a preform rod bending correction system, comprising:

[0015] The preform rod bending detection device as described in the first aspect above, wherein the first straight line direction and the second straight line direction are both horizontal, and the reference axis is vertical;

[0016] A heating device, which is used to heat the handle bar to soften the handle bar, and is suitable for restoring the softened handle bar to a vertical axis state through gravity;

[0017] A controller, wherein the first laser receiver, the second laser receiver and the heating device are all connected to the controller, and the controller determines whether the tested handle bar is bent relative to the preform bar in the second straight line direction according to the width data of the first light beam received by the first laser receiver, and determines whether the tested handle bar is bent relative to the preform bar in the first straight line direction according to the width data of the second light beam received by the second laser receiver. The controller is also used to control the start or stop of the heating device.

[0018] Preferably, the controller calculates the angle between the axis of the rod and the axis of the preform rod based on the width of the first light beam received by the first laser receiver and the corresponding reference parameters, and the width of the second light beam received by the second laser receiver and the corresponding reference parameters, and controls the heating device to start when the angle exceeds the set value.

[0019] Preferably, the heating device heats the end of the rod close to the preform rod.

[0020] Preferably, the heating device comprises an oxyhydrogen flame heating device.

[0021] In a third aspect, the present application provides a method for correcting the bending of a preform rod, which uses the preform rod bending correction system as described in the second aspect above to perform correction.

[0022] Compared with the prior art, the technical solution of the present application has at least the following beneficial technical effects:

[0023] 1. The detection device of the present application is provided with a first detection component and a second detection component. In the first detection component, the first laser emitter emits a first light beam with a set width. For the standard handle bar, its axis is coaxial with the axis of the preform rod. When the standard handle bar is placed in the optical path of the first light beam and its axis coincides with the reference axis, the first light beam is partially blocked by the standard handle bar. At this time, the first laser receiver receives part of the first light beam and uses the width of the part of the first light beam as the reference parameter. When the handle bar to be tested is tested, if the width of the part of the first light beam received by the first laser receiver changes, it indicates that the handle bar to be tested is offset in the second straight line direction compared with the standard handle bar, that is, the handle bar to be tested is bent relative to the preform rod in the second straight line direction, so that it can be judged whether the handle bar to be tested is bent in the second straight line direction, and according to the increase or decrease of the width of the first light beam received by the first laser receiver, the specific bending direction of the handle bar to be tested in the second straight line direction can be judged. Similarly, the second detection component can be used to judge whether the handle bar to be tested is bent in the first straight line direction, and the specific bending direction of the handle bar to be tested in the first straight line direction can be judged, so as to realize the judgment of whether the handle bar of the prefabricated board is bent. At the same time, based on the width of the first light beam received by the first laser receiver and the corresponding reference parameters, the width of the second light beam received by the second laser receiver and the corresponding reference parameters, and the distance between the first light beam, the second light beam and the preform rod in the axial direction of the reference axis, the angle between the handle rod axis and the preform rod axis, as well as the specific bending direction can be calculated to achieve accurate detection of the bending direction and degree of the handle rod under test.

[0024] 2. The detection device of the present application makes the width of the first light beam in the second straight line direction and the width of the second light beam in the first straight line direction not less than the diameter of the handle bar, and makes the reference axis equal to the boundary distances on both sides of the first light beam in the second straight line direction, and equal to the boundary distances on both sides of the second light beam in the first straight line direction. When the first light beam is blocked by the handle bar to be measured, the first laser receiver receives two discontinuous first light beams in the second straight line direction. The widths of the two first light beams can be compared with the corresponding width reference values ​​to more accurately determine the degree and direction of bending of the handle bar to be measured in the second straight line direction. Similarly, the widths of the two second light beams received by the second laser receiver can be compared with the corresponding width reference values ​​to more accurately determine the degree and direction of bending of the handle bar to be measured in the first straight line direction.

[0025] 3. The preform rod handle bar bending correction system of the present application detects whether the detected handle bar is bent through a detection device and a controller, and controls the start or operation of a heating device through the controller. When the heating device is started, the handle bar is heated to soften it. Since the axis of the preform rod is vertical, the handle bar will return to the state of vertical axis under the action of gravity after being heated and softened, thereby achieving correction of the bent handle bar. The operator can control whether to start the heating through the controller according to the detection result of the bending of the handle bar by the cooperation of the controller and the detection device, so as to start the heating device to correct the handle bar when it is bent, so as to clamp the handle bar with the lower chuck of the front processing equipment and avoid breaking the handle bar. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic structural diagram of a preform rod bending detection device provided by an embodiment of the present invention;

[0027] Figure 2 A schematic diagram of a preform rod handle bending detection device provided in an embodiment of the present invention detecting a handle rod to be detected;

[0028] Figure 3 A schematic structural diagram of a preform rod bending correction system provided in an embodiment of the present invention.

[0029] Description of reference numerals:

[0030] 1. First laser transmitter; 2. First laser receiver; 3. Second laser transmitter; 4. Second laser receiver; 5. Heating device; 6. Controller; 7. Preform rod; 8. Front processing furnace; 9. Chuck. DETAILED DESCRIPTION

[0031] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0033] It will be appreciated that spatial relationship terms such as "under," "beneath," "below," "under," "above," "above," etc., may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It will be appreciated that, in addition to the orientations shown in the figures, spatial relationship terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0034] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediate element. The "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0035] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0036] Reference Figure 1-2 As shown, an embodiment of the present application provides a preform rod handle bending detection device, which includes a first detection component and a second detection component.

[0037] Reference Figure 1-2As shown, the first detection component includes a first laser emitter 1 and a first laser receiver 2. The first laser emitter 1 is used to emit a first light beam along a first straight line direction, and the first light beam has a set width in a second straight line direction perpendicular to the first straight line direction. The first laser receiver 2 is used to receive the first light beam. The first laser emitter 1 and the first laser receiver 2 are arranged on both sides of a reference axis in a radial direction. The reference axis is perpendicular to both the first straight line direction and the second straight line direction and is located in the optical path of the first light beam.

[0038] Reference Figure 1-2 As shown, the second detection component includes a second laser emitter 3 and a second laser receiver 4. The second laser emitter 3 is used to emit a second light beam along a second straight line direction, and the second light beam has a set width in the first straight line direction. The second laser receiver 4 is used to receive the second light beam. The second laser emitter 3 and the second laser receiver 4 are arranged on both sides of the reference axis in the radial direction, and the reference axis is located in the optical path of the second light beam.

[0039] Wherein, when setting the reference axis position and the width of the first light beam and the second light beam, the standard handle bar whose axis coincides with the axis of the preform rod 7 is located in the optical path of the first light beam and the second light beam, and when the axis of the standard handle bar coincides with the reference axis, the first light beam and the second light beam are partially blocked by the standard handle bar. During detection, the handle bar to be tested is placed in the optical path of the first light beam and the second light beam, and the axis of the preform rod 7 connected to the handle bar to be tested is coincident with the reference axis. According to the comparison result of the width data of the first light beam blocked by the handle bar to be tested received by the first laser receiver 2 and the corresponding reference parameter, it is judged whether the handle bar to be tested is bent relative to the preform rod 7 in the second straight line direction, and according to the comparison result of the width data of the second light beam blocked by the handle bar to be tested received by the second laser receiver 4 and the corresponding reference parameter, it is judged whether the handle bar to be tested is bent relative to the preform rod 7 in the first straight line direction.

[0040] For the standard handle bar located in the optical path of the first light beam and the second light beam, the first laser receiver 2 and the second laser receiver 4 respectively receive the first light beam and the second light beam blocked by the standard handle bar, and the width of the light beams received by the first laser receiver 2 and the second laser receiver 4 is used as the reference parameter. For the handle bar to be measured located in the optical path of the first light beam and the second light beam, if it is bent relative to the preform 7, the axis of the handle bar to be measured will be offset relative to the axis of the standard handle bar, and at this time, the width of the first light beam blocked by the handle bar to be measured received by the first laser receiver 2 changes relative to the reference parameter, and / or the width of the second light beam blocked by the handle bar to be measured received by the second laser receiver 4 changes relative to the reference parameter. Therefore, by comparing the width data of the first light beam blocked by the handle bar to be measured received by the first laser receiver 2 with the corresponding reference parameter, it can be determined whether the handle bar to be measured is bent relative to the preform 7 in the second straight line direction, and by comparing the width data of the second light beam blocked by the handle bar to be measured received by the second laser receiver 4 with the corresponding reference data, it can be determined whether the handle bar to be measured is bent relative to the preform 7 in the first straight line direction.

[0041] Reference Figure 1-2 As shown, in order to more accurately determine the bending direction and bending angle of the handle bar under test relative to the preform rod 7, the width of the first light beam in the second straight line direction and the width of the second light beam in the first straight line direction are not less than the diameter of the handle bar. At the same time, the reference axis is equidistant from the two side boundaries of the first light beam in the second straight line direction, and equidistant from the two side boundaries of the second light beam in the first straight line direction.

[0042] Through this setting, for the standard handle bar located in the optical path of the first light beam and the second light beam, after the first light beam and the second light beam are blocked by the standard handle bar, the first laser receiver 2 receives two discontinuous first light beams in the second straight line direction, the two first light beams have the same width and are used as the reference parameter, and the second laser receiver 4 receives two discontinuous second light beams in the first straight line direction, the two second light beams have the same width and are used as the reference parameter. When detecting the handle bar to be tested, the handle bar to be tested is located in the optical path of the first light beam and the second light beam. If it is bent relative to the preform rod 7, the axis of the handle bar to be tested will be offset relative to the axis of the standard handle bar. At this time, the width of the two first light beams blocked by the handle bar to be tested received by the first laser receiver 2 changes relative to the reference parameter, and / or the width of the two second light beams blocked by the handle bar to be tested received by the second laser receiver 4 changes relative to the reference parameter, and the specific bending direction and bending degree of the handle bar to be tested in the second straight line direction can be determined according to the specific changes of the two first light beams relative to the reference parameter, and the specific bending direction and bending degree of the handle bar to be tested in the first straight line direction can be determined according to the specific changes of the two second light beams relative to the reference parameter. Therefore, the bending degree and bending direction of the handlebar under test in the first straight line direction and the second straight line direction can be determined more accurately.

[0043] In this embodiment, the first light beam and the second light beam are located in a plane perpendicular to the reference axis. In actual detection, the distance between the first light beam and the second light beam in the axial direction of the reference axis and the preform rod 7 connected to the handle bar to be detected is a known parameter. By establishing a spatial coordinate system with the first straight line direction and the second straight line direction as the X-axis and the Y-axis and the reference axis as the Z-axis, the bending direction of the axis of the handle bar to be detected relative to the axis of the preform rod 7 and the angle between the axis of the handle bar to be detected and the axis of the preform rod 7 can be calculated based on the detection data, and the specific bending degree of the handle bar to be detected can be calculated. The operator can determine whether correction is required based on the specific bending degree of the handle bar to be detected.

[0044] Reference Figure 1-3 As shown, an embodiment of the present application further provides a preform rod handle bending correction system, comprising the preform rod handle bending detection device and the heating device 5 and the controller 6 as described above.

[0045] Reference Figure 1-3 As shown, the first straight line direction and the second straight line direction are both horizontal, and the reference axis is vertical. At this time, when the axis of the preform rod 7 connected to the tested handle bar coincides with the reference axis, the axis is in a vertical state, and when the tested handle bar is bent, it is in a late state relative to the vertical axis. A heating device 5 is provided to heat the handle bar to soften the handle bar, and restore the softened handle bar to a vertical state through gravity.

[0046] During the front end processing, the preform rod 7 is usually clamped and moved by the spindle moving unit, and the preform rod 7 is kept in a vertical state. The lower handle bar passes through the front end processing furnace 8 from top to bottom and is clamped and fixed by the clamp 9. Therefore, the present application sets a preform rod handle bar bending detection device and a heating device 5 according to the state of the preform rod 7 when entering the front end processing equipment. When the preform rod 7 enters the front end processing equipment and the lower handle bar is not clamped by the clamp 9 of the front end processing equipment, the preform rod handle bar bending detection device is used to detect whether the handle bar is bent, and the heating device 5 is started to correct the handle bar when it is bent, so as to ensure that the clamp 9 can safely clamp the lower handle bar.

[0047] Reference Figure 1-3 As shown, the first laser receiver 2, the second laser receiver 4 and the heating device 5 are all connected to the controller 6. The controller 6 determines whether the measured handle bar is bent relative to the preform rod 7 in the second straight line direction according to the width data of the first light beam received by the first laser receiver 2, and determines whether the measured handle bar is bent relative to the preform rod 7 in the first straight line direction according to the width data of the second light beam received by the second laser receiver 4. The controller 6 is also used to control the heating device 5 to start or stop.

[0048] Reference Figure 1-3 As shown, specifically, when the handle bar to be tested reaches the set position of the front-end processing equipment and is not clamped by the clamp 9, the first laser receiver 2 and the second laser receiver 4 respectively receive the first light beam and the second light beam blocked by the handle bar to be tested, and obtain the width data of the first light beam and the second light beam received, and transmit the data to the controller 6. The controller 6 has a built-in program algorithm and database, compares the width data of the first light beam received by the first laser receiver 2 with the reference data, and compares the width data of the second light beam received by the second laser receiver 4 with the reference data, so as to determine whether the handle bar to be tested is bent relative to the preform 7 in the first straight line direction and the second straight line direction. The controller 6 determines whether to start the heating device 5 according to the comparison result. When the handle bar to be tested is bent relative to the preform 7, the controller 6 controls the heating device 5 to start heating the handle bar to be tested to soften it, so that the handle bar to be tested is restored to the state of vertical axis under the action of gravity. While the preform 7 enters the front-end processing equipment for normal processing procedures, the bending detection and correction work of the handle bar to be tested can be automatically completed, without the need to perform bending detection and correction on the handle bar to be tested separately, thereby improving production efficiency.

[0049] Furthermore, in the case where the bending degree of the handle bar to be measured is small, it is not easy to cause the breakage when the chuck 9 clamps the handle bar to be measured, and the handle bar to be measured may not be corrected at this time. Therefore, the controller 6 is configured to calculate the angle between the axis of the handle bar and the axis of the preform 7 according to the width of the first light beam received by the first laser receiver 2 and the corresponding reference parameter, and the width of the second light beam received by the second laser receiver 4 and the corresponding reference parameter, and control the heating device 5 to start when the angle exceeds the set value. Specifically, the distance between the first light beam and the second light beam in the axial direction of the reference axis and the preform 7 connected to the handle bar to be measured is a known parameter. The controller 6 calculates the angle between the axis of the handle bar to be measured and the axis of the preform 7 according to the width of the first light beam received by the first laser receiver 2 and the corresponding reference parameter, and the width of the second light beam received by the second laser receiver 4 and the corresponding reference parameter, through the built-in software algorithm, so as to judge the bending degree of the handle bar to be measured. When the angle between the axis of the handle bar to be measured and the axis of the preform 7 exceeds the set value, the controller 6 controls the heating device 5 to start heating and correcting the handle bar to be measured. When the bending degree of the handle bar to be tested is small, the handle bar to be tested does not need to be corrected, thereby reducing the number of working steps and improving production efficiency.

[0050] Reference Figure 3 As shown, further, the heating device 5 adopts a hydrogen-oxygen flame heating device 5, and when the heating device 5 is set, since the end of the rod close to the preform rod 7 is bent relative to the preform rod 7 when the rod is bent, the heating device 5 is set at the end of the rod close to the preform rod 7. The end of the rod close to the preform rod 7 is heated by the heating device 5 to soften it, and the rod can be restored to the vertical state of the axis under the action of gravity.

[0051] This embodiment also provides a method for correcting the bending of a preform rod, which uses the preform rod bending correction system as described above to perform correction.

[0052] The method for correcting the bending of the preform rod described here is as described in the above embodiment, and for the sake of simplicity, it will not be repeated here.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A preform rod handle bending detection device, characterized in that: include: A first detection component, comprising a first laser emitter (1) and a first laser receiver (2), wherein the first laser emitter (1) is used to emit a first light beam along a first straight line direction, and the first light beam has a set width in a second straight line direction perpendicular to the first straight line direction, and the first laser receiver (2) is used to receive the first light beam, and the first laser emitter (1) and the first laser receiver (2) are arranged on both sides of a reference axis in a radial direction, and the reference axis is perpendicular to both the first straight line direction and the second straight line direction and is located in the light path of the first light beam; A second detection component, comprising a second laser emitter (3) and a second laser receiver (4), wherein the second laser emitter (3) is used to emit a second light beam along a second straight line direction, and the second light beam has a set width in the first straight line direction, and the second laser receiver (4) is used to receive the second light beam, and the second laser emitter (3) and the second laser receiver (4) are arranged on both sides of a reference axis in a radial direction, and the reference axis is located in the optical path of the second light beam; Wherein, a standard handle bar whose axis coincides with the axis of the preform rod (7) is located in the optical path of the first light beam and the second light beam, and when the axis of the standard handle bar coincides with the reference axis, the first light beam and the second light beam are partially blocked by the standard handle bar, which is suitable for placing the handle bar to be tested in the optical path of the first light beam and the second light beam, and making the axis of the preform rod (7) connected to the handle bar to be tested coincide with the reference axis, judging whether the handle bar to be tested is bent relative to the preform rod (7) in the second straight line direction according to the comparison result of the width data of the first light beam blocked by the handle bar to be tested received by the first laser receiver (2) and the corresponding reference parameter, and judging whether the handle bar to be tested is bent relative to the preform rod (7) in the first straight line direction according to the comparison result of the width data of the second light beam blocked by the handle bar to be tested received by the second laser receiver (4) and the corresponding reference parameter.

2. The preform rod handle bending detection device according to claim 1, characterized in that: The width of the first light beam in the second straight line direction and the width of the second light beam in the first straight line direction are both not less than the diameter of the handle.

3. The preform rod handle bending detection device according to claim 2, characterized in that: The reference axis is equidistant from both side boundaries of the first light beam in the second straight line direction, and is equidistant from both side boundaries of the second light beam in the first straight line direction.

4. A preform rod bending correction system, characterized in that: include: The preform rod handle bending detection device according to any one of claims 1 to 3, wherein the first straight line direction and the second straight line direction are both horizontal, and the reference axis is vertical; A heating device (5) is used to heat the handle bar to soften the handle bar, so that the softened handle bar can be restored to a vertical axis state through the action of gravity; A controller (6), wherein the first laser receiver (2), the second laser receiver (4) and the heating device (5) are all connected to the controller (6); the controller (6) determines whether the handle bar to be measured is bent relative to the preform bar (7) in the second straight line direction according to the width data of the first light beam received by the first laser receiver (2); and determines whether the handle bar to be measured is bent relative to the preform bar (7) in the first straight line direction according to the width data of the second light beam received by the second laser receiver (4); and the controller (6) is also used to control the heating device (5) to start or stop.

5. The preform rod handle bending correction system according to claim 4, characterized in that: The controller (6) calculates the angle between the axis of the rod and the axis of the preform rod (7) based on the width of the first light beam received by the first laser receiver (2) and the corresponding reference parameter, and the width of the second light beam received by the second laser receiver (4) and the corresponding reference parameter, and controls the heating device (5) to start when the angle exceeds a set value.

6. The preform rod bending correction system according to claim 4, characterized in that: The heating device (5) heats the end of the rod close to the preform rod (7).

7. The preform rod handle bending correction system according to claim 4, characterized in that: The heating device (5) comprises an oxyhydrogen flame heating device (5).

8. A method for correcting the bending of a preform rod, characterized in that: The preform rod bending correction system according to any one of claims 4 to 7 is used for correction.

Images