A correction method for crossflow fan blade

Abstract

The present invention discloses a correction method for a crossflow fan blade, which relates to the technical field of crossflow fan blade detection and production, and includes: controlling the rotation of the crossflow fan blade and detecting the rotation angle, detecting the diameter runout of the crossflow fan blade corresponding to different rotation angles in multiple positions in the length direction; determining the first pressing position of the crossflow fan blade according to the overall diameter runout data; controlling the rotation of the crossflow fan blade, and simultaneously heating the length position where the first pressing position is located in the circumferential direction; controlling the crossflow fan blade to rotate to the first pressing position on the upper side and then stop rotating, controlling the pressing unit to press down on the first pressing position to deform the crossflow fan blade, and when the pressing unit presses down to the set first pressing time, controlling the pressing unit to move upward away from the crossflow fan blade. The first pressing position is deformed by the downward pressure, which can reduce the diameter runout of the crossflow fan blade, thereby realizing automatic correction of the crossflow fan blade, without the need for manual correction, and reducing the scrap of finished products.

Description

Technical Field

[0001] The invention relates to the technical field of crossflow fan blade detection and production, and in particular to a correction method for a crossflow fan blade. Background Art

[0002] Crossflow fan blades are the core parts for generating air volume in air conditioners, household fans, etc. The runout of crossflow fan blades affects the air volume, operating noise, etc. Crossflow fan blades are welded together with multiple blade segments. The runout is affected by factors such as the shape of the blade segment, welding positioning accuracy, and welding quality. Some finished products may have a diameter runout exceeding the standard value. At present, some treatment methods are to directly scrap them, which will increase the production cost. Other methods are to correct them manually, but the operation is more troublesome and requires more reliance on manual experience. Summary of the invention

[0003] The main purpose of the present invention is to provide a correction method for a crossflow fan blade, aiming to solve the technical problems in the prior art that directly scrapping products with large diameter runout is costly, while manual correction is cumbersome to operate.

[0004] To achieve the above object, the present invention provides a correction method for a crossflow fan blade, comprising:

[0005] S1: Place the crossflow fan blades so that both ends of the crossflow fan blades are supported and the middle part is suspended;

[0006] S2: Control the rotation of the crossflow fan blade and detect the rotation angle, detect the radial runout of the crossflow fan blade corresponding to different rotation angles at multiple positions in the length direction, and obtain the overall radial runout data of the crossflow fan blade;

[0007] S3: determining a first downward pressing position of the crossflow fan blade according to the overall diameter runout data;

[0008] S4: controlling the crossflow blade to rotate, and simultaneously heating the length position where the first downward pressing position is located in the circumferential direction;

[0009] S5: After the length position where the first pressing position is located is heated and softened, the cross-flow fan blade is controlled to rotate until the first pressing position is on the upper side and then stop rotating, and the pressing unit is controlled to press down on the first pressing position to deform the cross-flow fan blade. When the pressing unit presses down for a set first pressing time, the pressing unit is controlled to move upward away from the cross-flow fan blade.

[0010] The crossflow fan blade to be corrected is placed with the middle part of the crossflow fan blade suspended in the air; then the rotation of the crossflow fan blade is controlled, and the rotation angle of the crossflow fan blade is detected at the same time, and the radial runout is detected at different length positions to obtain the overall radial runout data of the crossflow fan blade at different rotation angles at different length positions, so as to determine the first downward pressing position to be corrected by downward pressing; then the rotation of the crossflow fan blade is controlled, and the length position where the first downward pressing position is located is heated circumferentially; when the crossflow fan blade is softened by heat, the crossflow fan blade is rotated so that the first downward pressing position is on the upper side, and then the downward pressing unit presses down on the first downward pressing position, and the first downward pressing position is deformed by the downward pressure, which can reduce the radial runout of the crossflow fan blade, thereby realizing automatic correction of the crossflow fan blade without manual correction, thereby reducing the amount of scrapped finished products.

[0011] Preferably, in step S2, the difference between the radial runout corresponding to each rotation angle and the radial runout corresponding to the adjacent angle interval is calculated;

[0012] If the phase difference is outside the preset range, the corresponding radial runout is not included in the overall radial runout data.

[0013] When there are defects such as burrs on the crossflow impeller, the radial runout measured at that position will be relatively large, resulting in misjudgment. This solution compares the radial runout at a certain rotation angle with the radial runout at adjacent angle intervals of adjacent angles. If the difference between the radial runout at the rotation angle is too large, the radial runout is eliminated to avoid misjudgment due to defects such as burrs, thereby improving the accuracy of detection and correction.

[0014] Preferably, the detection position of the radial runout and the first pressing position are arranged on the outer periphery of the radial plate of the crossflow blade;

[0015] In step S2, the method of detecting the radial runouts of the crossflow blades at different rotation angles corresponding to a plurality of positions in the length direction includes: detecting the radial runouts of the outer circumferences of a plurality of radial plates respectively.

[0016] Preferably, in step S3, the first pressing position is a position where the radial runout is the largest in the overall radial runout data.

[0017] Preferably, in step S5, the pressing unit is a pressing cylinder, the first pressing time is determined according to the radial runout of the first pressing position, and the first pressing time is positively correlated with the radial runout of the first pressing position.

[0018] Preferably, in step S5, the method for determining whether the length position where the first pressing position is located is heated and softened includes:

[0019] The temperature of the heated position of the crossflow fan blade is detected while heating. When the detected temperature reaches a preset temperature, it is considered that the length position where the first pressing position is located is heated and softened.

[0020] By determining the heating temperature of the crossflow fan blades by means of temperature detection, the heating of the crossflow fan blades can be controlled more accurately, so that the degree of softening of the crossflow fan blades by heat is more uniform and the correction is more accurate.

[0021] Preferably, the heating method in step S4 is heating by hot air blowing.

[0022] Preferably, the correction method further comprises:

[0023] S6: The supported positions at both ends of the crossflow fan blade are the end shaft and the end hole of the crossflow fan blade respectively, the rotation of the crossflow fan blade is controlled and the rotation angle is detected, and the runout of the end shaft of the crossflow fan blade corresponding to different rotation angles is detected to obtain the end shaft runout data;

[0024] S7: determining a second downward pressing position on the outer periphery of the end plate of the crossflow blade according to the end shaft runout data;

[0025] S8: controlling the crossflow fan blade to rotate, and simultaneously heating the connection area between the end shaft and the end plate of the crossflow fan blade in the circumferential direction;

[0026] S9: After the connection area between the end shaft and the end plate of the cross-flow fan blade is heated and softened, the cross-flow fan blade is controlled to rotate to the second downward pressing position on the upper side and then stop rotating, and the downward pressing unit is controlled to press down on the second downward pressing position to deform the cross-flow fan blade. When the downward pressing unit presses down for a set second downward pressing time, the downward pressing unit is controlled to move upward away from the cross-flow fan blade.

[0027] At the end shaft position of the crossflow fan blade, the end shaft has excessive radial runout due to reasons such as the end shaft and the end plate not being perpendicular or the end plate being deformed. Therefore, this solution also corrects the runout of the end shaft of the crossflow fan blade. The crossflow fan blade is controlled to rotate, and the rotation angle of the crossflow fan blade and the runout of the end shaft are detected at the same time to obtain the end shaft runout data of the end shaft, so that the second downward pressing position to be corrected by downward pressing can be determined; then the crossflow fan blade is controlled to rotate, and the connection position of the end shaft and the end plate and the circumference of the end plate are heated; when the end plate is softened by heat, the crossflow fan blade is rotated so that the second downward pressing position of the end plate is on the upper side, and then the downward pressing unit presses down on the second downward pressing position of the end plate, and the second downward pressing position of the end plate is subjected to downward pressure, and the end shaft is subjected to upward supporting force, so that the connection position of the end shaft and the end plate or the end plate is deformed, which can reduce the runout of the end shaft, thereby realizing automatic correction of the end shaft runout.

[0028] Preferably, in step S6, the position of the end shaft is detected to be a side of the end shaft away from the end plate;

[0029] In the step S7, the second pressing position is the position with the largest runout in the end shaft runout data.

[0030] Preferably, after step S5, the process returns to step S2 to detect the radial runout of the crossflow blade:

[0031] If the radial runout of the crossflow blade is qualified, proceed to step S6;

[0032] If the radial runout of the crossflow fan blade is unqualified, then continue to perform steps S3 to S5. If the crossflow fan blade is still unqualified after the preset correction times of the cycle steps S2 to S5, then remove the crossflow fan blade for further correction or scrapping.

[0033] After step S9, the process returns to step S6 to detect the runout of the end shaft:

[0034] If the runout of the end shaft is acceptable, remove the crossflow blades;

[0035] If the runout of the end shaft is unqualified, continue to steps S7 to S9. If it is still unqualified after the preset correction times of the cycle steps S6 to S9, the crossflow fan blades are removed for further correction or scrapped. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0037] Figure 1 This is a front view structural schematic diagram of detecting the radial runout of a crossflow fan blade in the present invention;

[0038] Figure 2 It is a front view structural schematic diagram of the present invention when the pressing unit presses down a radial plate of the crossflow fan blade to correct the radial runout of the crossflow fan blade;

[0039] Figure 3 It is a front view structural schematic diagram of the present invention when the pressing unit presses down the end plate of the crossflow fan blade to correct the runout of the end shaft;

[0040] Figure 4 This is a schematic diagram of the side view structure when the radial plate of the crossflow fan blade is heated in the present invention;

[0041] Figure 5 It is a schematic side view of the structure when the pressing unit presses down the radial plate of the crossflow fan blade in the present invention.

[0042] In the accompanying drawings: 1-crossflow fan blade, 11-blade, 12-diameter plate, 13-end shaft, 14-end plate, 15-end hole, 2-downward pressure unit, 21-downward pressure cylinder, 22-pressure block, 221-arc-shaped pressure surface, 3-supporting mechanism, 4-first diameter runout sensor, 5-first heating device, 6-temperature sensor, 7-second runout sensor, 8-second heating device.

[0043] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0045] It should be noted that if the embodiments of the present invention involve directional indications, such as up, down, left, right, front, back, etc., then the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0046] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of technical personnel in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0047] like Figures 1 to 5 As shown, a correction method for a crossflow fan blade comprises the following steps:

[0048] Step S1: placing the crossflow fan blade 1 so that both ends of the crossflow fan blade 1 are supported and the middle part is suspended in the air;

[0049] Step S2: controlling the crossflow fan blade 1 to rotate and detecting the rotation angle, detecting the radial runout amounts of the crossflow fan blade 1 at different rotation angles corresponding to multiple positions in the length direction, and obtaining the overall radial runout data of the crossflow fan blade 1;

[0050] Step S3: determining a first downward pressing position of the crossflow fan blade 1 according to the overall diameter runout data;

[0051] Step S4: controlling the crossflow fan blade 1 to rotate, and simultaneously heating the length position where the first downward pressing position is located in the circumferential direction;

[0052] Step S5: After the length position where the first pressing position is located is heated and softened, the cross-flow fan blade 1 is controlled to rotate to the first pressing position on the upper side and then stop rotating, and the pressing unit 2 is controlled to press down on the first pressing position to deform the cross-flow fan blade 1. When the pressing unit 2 presses down for the set first pressing time, the pressing unit 2 is controlled to move upward away from the cross-flow fan blade 1.

[0053] The crossflow fan blade 1 to be corrected is placed, and the middle part of the crossflow fan blade 1 is suspended in the air; then the crossflow fan blade 1 is controlled to rotate, and the rotation angle of the crossflow fan blade 1 is detected at the same time. Before starting the detection, the angle origin is set and the rotation to the angle origin is performed, and the radial runout is detected at different length positions to obtain the overall radial runout data of the crossflow fan blade 1 at different length positions and different rotation angles, that is, the crossflow fan blade 1 is rotated at least one circle at different positions in the length direction, and the radial runout at different rotation angles is detected to obtain the corresponding data of the length position, rotation angle and radial runout and store them. The shape of the crossflow fan blade 1 may be as follows: Figure 2 The shape of the middle dotted line can determine the first downward pressing position to be corrected by downward pressing; then the crossflow fan blade 1 is controlled to rotate, and the length position where the first downward pressing position is located is heated circumferentially; when the crossflow fan blade 1 is softened by heat, the crossflow fan blade 1 is rotated so that the first downward pressing position is on the upper side, and then the downward pressing unit 2 presses down the first downward pressing position, referring to Figure 2 and Figure 5 The first downward pressure position is subjected to downward pressure. Since the middle part of the crossflow fan blade 1 is suspended in the air, the heated and softened position is deformed downward, which can reduce the radial runout of the crossflow fan blade 1, thereby realizing automatic correction of the crossflow fan blade 1 without manual correction, reducing the amount of scrapped finished products, and integrating detection and correction on the same device, eliminating the need to use multiple devices, thereby improving efficiency.

[0054] The placement of the crossflow fan blade 1 can be specifically carried out by inserting the end hole 15 at one end of the crossflow fan blade 1 through the expansion shaft mechanism, the expansion shaft mechanism supports one end of the crossflow fan blade 1, and the expansion shaft mechanism is connected to the servo motor, the servo motor drives the crossflow fan blade 1 to rotate through the expansion shaft mechanism, and the rotation angle can be detected during the rotation process; the end shaft 13 on the other side of the crossflow fan blade 1 is supported by the supporting mechanism 3, and the end shaft 13 can rotate on the supporting mechanism 3, so that the two ends of the crossflow fan blade 1 are supported and the middle part is suspended.

[0055] The radial runout can be detected by using a first radial runout sensor 4, which can be specifically a contact sensor such as a contact probe, or a non-contact distance measuring sensor such as a laser sensor. The radial runout sensor moves to different positions and stops in the length direction of the crossflow fan blade 1 to detect the radial runout at different positions.

[0056] In some specific embodiments, the heating method in step S4 is heating by hot air blowing. Specifically, the first heating device 5 such as an electric hair dryer can be used for heating. The electric hair dryer can be moved at different positions along the length of the crossflow fan blade 1 to heat different positions. When heating, the electric hair dryer can be moved close to the crossflow fan blade. Figure 4 , and stay away after heating.

[0057] Heating is performed by hot air blowing. The hot air can diffuse from the outer periphery of the radial plate to the inner side. The heating area is large, the heat spreads quickly, the temperature will not be too concentrated or too high, and the heating of the crossflow fan blades is gradually increased to avoid the temperature of the outer periphery being too high and the temperature of the inner side being too low. Furthermore, the heating range of the hot air blowing is the width of the radial plate plus 5-15mm on both sides of the radial plate. Within this width range, the heat softening and correction effect of the connection between the radial plate and the blade is better. For crossflow fan blades of different material specifications, the heating temperature is about 80-100 degrees, and the heating time is 20s-1min. In other embodiments, the heating method can also be a method of wrapping an electric heating wire around the outer periphery of the crossflow fan blade.

[0058] In some specific embodiments, in step S5, the pressing unit 2 is a pressing cylinder 21, and the first pressing time is determined according to the diameter runout of the first pressing position, and the first pressing time is positively correlated with the diameter runout of the first pressing position.

[0059] Reference Figure 4 and Figure 5 The downward pressure unit 2 uses a downward pressure cylinder, which can move in the length direction of the crossflow fan blade 1 to correct the downward pressure at different positions of the crossflow fan blade 1. For the crossflow fan blades 1 of the same material specifications, under the same air pressure, the pressure of the downward pressure unit 2 on the crossflow fan blade 1 is the same. Under the same heating temperature, the correction amount can be adjusted by adjusting the downward pressure time, which is convenient for controlling the correction amount. Different air pressures, heating temperatures and downward pressure times can be set according to the crossflow fan blades 1 of different material specifications.

[0060] Furthermore, the piston rod of the downward pressure cylinder is connected to a pressure block 22, and a contoured arc-shaped pressure surface 221 is provided on the lower side of the pressure block 22 to better match the shape of the crossflow fan blade 1. The arc-shaped pressure surface is pressed on the outer surface of the diameter plate, thereby increasing the contact area with the diameter plate in the circumferential direction. When the actual first downward pressure position is not on the upper side due to factors such as errors in detecting the radial runout of the diameter plate, the arc-shaped pressure surface can also be pressed at a position with a larger radial runout, thereby improving the correction effect.

[0061] In some specific embodiments, in step S2, the difference between the radial runout corresponding to each rotation angle and the radial runout corresponding to the adjacent angle interval is calculated;

[0062] If the phase difference is outside the preset range, the corresponding radial runout will not be included in the overall radial runout data.

[0063] When defects such as burrs appear on the crossflow fan blade 1, the radial runout measured at this position will be relatively large, resulting in misjudgment. This solution compares the radial runout at a certain rotation angle with the radial runout in the adjacent angle interval of the adjacent angle. If the difference in the radial runout at the rotation angle is too large, the difference can be the absolute value of the difference between the two. For example, if the absolute value of the difference between the radial runout at a rotation angle of 150 degrees and the radial runout in the rotation angle range of 149 to 151 degrees is greater than the preset range, the radial runout is eliminated to avoid misjudgment due to defects such as burrs, thereby improving the accuracy of detection and correction.

[0064] In some specific embodiments, the detection position of the radial runout amount and the first downward pressing position are arranged on the outer periphery of the radial plate 12 of the crossflow blade 1;

[0065] In step S2 , the method of detecting the radial runouts of the crossflow blade 1 at different rotation angles corresponding to a plurality of positions in the length direction includes: detecting the radial runouts of the outer circumferences of a plurality of radial plates 12 respectively.

[0066] If the position of the blade 11 is detected, the detection data is discontinuous because the blades 11 arranged circumferentially are not connected, while the position of the radial plate 12 can be detected continuously, which improves the accuracy of detecting and analyzing the radial runout. Adjacent blade nodes are connected by welding the radial plate 12 and the blade 11. By heating the radial plate 12, that is, softening the welding position of the radial plate 12 and the blade 11, the radial plate 12 is pressed down to deform the welding position of the radial plate 12 and the blade 11, and correction is achieved, while other positions that are not heated and softened are basically not deformed or deformed very little. If pressure is applied on the blade 11, the blade 11 will be deformed, affecting the performance of the crossflow fan 1.

[0067] In some specific embodiments, referring to Figure 2 In step S3, the first pressing position is the position where the radial runout is the largest in the overall radial runout data.

[0068] The correction effect is best and most direct at the position where the radial runout is the largest.

[0069] In some specific embodiments, in step S5, the method for determining whether the length position where the first pressing position is located is heated and softened includes:

[0070] The temperature of the heated position of the crossflow fan blade 1 is detected while heating. The temperature sensor 6 may be used for temperature detection. When the detected temperature reaches a preset temperature, it is considered that the length position where the first downward pressing position is located is heated and softened.

[0071] By determining the heating temperature of the crossflow fan blade 1 by detecting the temperature, the heating of the crossflow fan blade can be controlled more accurately, so that the degree of softening of the crossflow fan blade 1 by heating is more uniform and the correction is more accurate. A temperature sensor can be used to detect the temperature, and the temperature sensor can move along the length direction of the crossflow fan blade 1 with the heating device to synchronously detect the temperature.

[0072] In some specific embodiments, the correction method further comprises:

[0073] S6: The supported positions at both ends of the crossflow fan blade 1 are the end shaft 13 and the end hole 15 of the crossflow fan blade 1 respectively, the crossflow fan blade 1 is controlled to rotate and the rotation angle is detected, and the runout amount of the end shaft 13 of the crossflow fan blade 1 corresponding to different rotation angles is detected to obtain the end shaft runout data;

[0074] S7: determining a second downward pressing position on the outer periphery of the end plate 14 of the crossflow fan blade 1 according to the end shaft runout data;

[0075] S8: controlling the crossflow blade 1 to rotate, and simultaneously heating the connection area between the end shaft 13 and the end plate 14 of the crossflow blade 1 in the circumferential direction;

[0076] S9: After the connection area between the end shaft 13 and the end plate 14 of the crossflow fan blade 1 is heated and softened, the crossflow fan blade 1 is controlled to rotate to the second pressing position on the upper side and then stop rotating, and the pressing unit 2 is controlled to press down on the second pressing position to deform the crossflow fan blade 1. When the pressing unit 2 presses down for the set second pressing time, the pressing unit 2 is controlled to move upward away from the crossflow fan blade 1.

[0077] At the end shaft 13 of the crossflow fan blade 1, the end shaft has excessive radial runout due to reasons such as the end shaft and the end plate not being perpendicular or the end plate being deformed. Therefore, this solution also corrects the runout of the end shaft 13 of the crossflow fan blade 1. The crossflow fan blade 1 is controlled to rotate, and the rotation angle of the crossflow fan blade 1 and the runout of the end shaft 13 are detected at the same time. Specifically, a second runout sensor 7 can be used for detection to obtain the end shaft runout data of the end shaft 13, and the second downward pressing position to be corrected by downward pressing can be determined; then the crossflow fan blade 1 is controlled to rotate, and the connection position between the end shaft 13 and the end plate 14 and the circumferential direction of the end plate surface are heated. Specifically, a second heating device 8 can be used for heating; when the end plate 14 is softened by heat, the crossflow fan blade is rotated so that the second downward pressing position of the end plate is on the upper side, and then the downward pressing unit 2 presses down the second downward pressing position of the end plate 14, refer to Figure 3 The second downward pressure position of the end plate 14 is subjected to downward pressure, and the end shaft 13 is subjected to an upward supporting force, so that the connection position between the end shaft 13 and the end plate 14 or the end plate is deformed, which can reduce the end shaft runout, thereby realizing automatic correction of the end shaft runout.

[0078] Since the crossflow fan blade is connected to the expansion shaft mechanism at one end of the end hole, the radial position of the crossflow fan blade at one end of the end hole is fixed, and it is in a supported free state on one side of the end shaft. The side of the crossflow fan blade away from the end hole is the free side, so the end shaft is the end of the free side of the crossflow fan blade, resulting in a greater impact of the radial runout of the crossflow fan blade on the runout of the end shaft. Therefore, the radial runout of the crossflow fan blade is corrected first, and then the runout of the end shaft is corrected. In this way, when correcting the runout of the end shaft, the radial runout of the corrected crossflow fan blade will basically not be affected, and the number of corrections can be reduced. If the runout of the end shaft is corrected first and then the radial runout of the crossflow fan blade is corrected, it will affect the runout of the corrected end shaft, which may cause the runout of the end shaft to become unqualified and need to be corrected again, increasing the number of corrections.

[0079] Further, in step S6, the position of the end shaft 13 is detected to be a side of the end shaft 13 away from the end plate 14;

[0080] In step S7, the second pressing position is the position with the largest runout in the end shaft runout data. When the end plate 14 rotates to the second pressing position on the upper side, the side of the end shaft 13 away from the end plate 14 tilts downward, and when the end plate 14 is pressed down, the end shaft 13 can be relatively deformed upward for correction.

[0081] In some specific embodiments, after step S5, the process returns to step S2 to detect the radial runout of the crossflow blade 1:

[0082] If the radial runout of the crossflow blade 1 is qualified, proceed to step S6;

[0083] If the radial runout of the crossflow fan blade 1 is unqualified, then continue to perform steps S3 to S5. If the crossflow fan blade 1 is still unqualified after the preset correction times of the cycle steps S2 to S5, then remove the crossflow fan blade 1 for further correction or scrapping.

[0084] After step S9, the process returns to step S6 to detect the runout of the end shaft 13:

[0085] If the runout of the end shaft 13 is acceptable, remove the crossflow fan blade 1;

[0086] If the runout of the end shaft 13 is unqualified, then continue to perform steps S7 to S9. If the steps S6 to S9 are circulated and still unqualified after reaching the preset correction times, then remove the crossflow fan blade 1 for further correction or scrapping.

[0087] After the downward pressure correction, the runout is immediately re-tested. If the runout is still unqualified, the correction is automatically performed again, which can be conveniently and quickly corrected. If it is still unqualified after several tests and corrections, the crossflow fan blade 1 is removed for further correction or scrapped.

[0088] In some specific embodiments, a preheating device is used to preheat the crossflow fan blade 1, which can shorten the heating and softening time, especially speed up the heating time when the external ambient temperature is low in winter.

[0089] In some specific embodiments, when the crossflow fan blade 1 is controlled to rotate to the first downward position and then stop rotating on the upper side in step S5, the crossflow fan blade 1 first rotates to the angle origin, and then determines whether the rotation angle corresponding to the first downward position is greater than 180 degrees. If it is less than or equal to 180 degrees, it rotates the corresponding angle. If it is greater than 180 degrees, it rotates in the opposite direction by 360 degrees minus the rotation angle. In this way, the angle that the crossflow fan blade 1 needs to rotate can be reduced, the rotation time can be shortened, and the correction efficiency can be improved.

[0090] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A method for correcting a crossflow fan blade, characterized in that: The following steps are involved: S1: placing the crossflow fan blade (1) so that both ends of the crossflow fan blade (1) are supported and the middle part is suspended in the air; S2: Controlling the rotation of the crossflow fan blade (1) and detecting the rotation angle, detecting the radial runout of the crossflow fan blade (1) at different rotation angles corresponding to a plurality of positions in the length direction, and obtaining the overall radial runout data of the crossflow fan blade (1); S3: determining a first downward pressing position of the crossflow fan blade (1) according to the overall diameter runout data; S4: controlling the crossflow fan blade (1) to rotate, and simultaneously heating the length position where the first downward pressing position is located in the circumferential direction; S5: after the length position where the first pressing position is located is heated and softened, the crossflow fan blade (1) is controlled to rotate until the first pressing position is on the upper side and then stops rotating, the pressing unit (2) is controlled to press down on the first pressing position so that the crossflow fan blade (1) is deformed, and when the pressing time of the pressing unit (2) reaches a set first pressing time, the pressing unit (2) is controlled to move upward away from the crossflow fan blade (1); The correction method also includes: S6: The supported positions at the two ends of the crossflow fan blade (1) are the end shaft (13) and the end hole (15) of the crossflow fan blade (1), respectively, the crossflow fan blade (1) is controlled to rotate and the rotation angle is detected, the runout amount of the end shaft (13) of the crossflow fan blade (1) corresponding to different rotation angles is detected, and the end shaft runout data is obtained; S7: determining a second downward pressing position on the outer periphery of the end plate (14) of the crossflow fan blade (1) according to the end shaft runout data; S8: controlling the crossflow blade (1) to rotate, and simultaneously heating the connection area between the end shaft (13) and the end plate (14) of the crossflow blade (1) in the circumferential direction; S9: After the connection area between the end shaft (13) and the end plate (14) of the crossflow fan blade (1) is heated and softened, the crossflow fan blade (1) is controlled to rotate to the second downward pressing position on the upper side and then stop rotating, and the downward pressing unit (2) is controlled to press down on the second downward pressing position to deform the crossflow fan blade (1). When the downward pressing time of the downward pressing unit (2) reaches the set second downward pressing time, the downward pressing unit (2) is controlled to move upward away from the crossflow fan blade (1).

2. The method for correcting a crossflow fan blade according to claim 1, characterized in that: In step S2, the difference between the radial runout corresponding to each rotation angle and the radial runout corresponding to the adjacent angle interval is calculated; If the phase difference is outside the preset range, the corresponding radial runout is not included in the overall radial runout data.

3. The method for correcting a crossflow fan blade according to claim 1, characterized in that: The detection position of the radial runout amount and the first downward pressing position are arranged on the outer periphery of the radial plate (12) of the crossflow fan blade (1); In step S2, the method for detecting the radial runout of the crossflow blade (1) at different rotation angles corresponding to a plurality of positions in the length direction comprises: respectively detecting the radial runout of the outer periphery of a plurality of radial plates (12).

4. The method for correcting a crossflow fan blade according to claim 1, characterized in that: In the step S3, the first pressing position is the position where the radial runout is the largest in the overall radial runout data.

5. The method for correcting a crossflow fan blade according to claim 1, characterized in that: In the step S5, the pressing unit (2) is a pressing cylinder, the first pressing time is determined according to the radial runout of the first pressing position, and the first pressing time is positively correlated with the radial runout of the first pressing position.

6. The method for correcting a crossflow fan blade according to claim 1, characterized in that: In the step S5, the method for determining whether the length position where the first pressing position is located is heated and softened includes: While heating, the temperature of the heated position of the crossflow fan blade (1) is detected, and when the detected temperature reaches a preset temperature, it is considered that the length position where the first downward pressing position is located is heated and softened.

7. The method for correcting a crossflow fan blade according to claim 1, characterized in that: The heating method in step S4 is heating by hot air blowing.

8. The method for correcting a crossflow fan blade according to claim 1, characterized in that: In the step S6, the position of the end shaft (13) is detected as the side of the end shaft (13) away from the end plate (14); In the step S7, the second pressing position is the position with the largest runout in the end shaft runout data.

9. The method for correcting a crossflow fan blade according to claim 1, characterized in that: After step S5, the process returns to step S2 to detect the radial runout of the crossflow fan blade (1): If the radial runout of the crossflow impeller (1) is acceptable, proceed to step S6; If the radial runout of the crossflow fan blade (1) is unqualified, then continue to perform steps S3 to S5. If the crossflow fan blade (1) is still unqualified after the preset correction times of the cycle steps S2 to S5, then remove the crossflow fan blade (1) for further correction or scrapping. After step S9, the process returns to step S6 to detect the runout of the end shaft (13): If the runout of the end shaft (13) is acceptable, the crossflow fan blade (1) is removed; If the runout of the end shaft (13) is unqualified, then continue to perform steps S7 to S9. If the steps S6 to S9 are circulated and still unqualified after reaching the preset number of corrections, then remove the crossflow fan blade (1) for further correction or scrapping.

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