A fan blade mold turning machine and turning method thereof

Abstract

The present invention discloses a wind turbine blade mold turning machine and a turning method thereof, and relates to the technical field of wind turbine blade production equipment. The wind turbine blade mold turning machine includes a module base, a lower turning arm assembly, and the lower turning arm assembly is installed on the top of the module base; a turning shaft assembly and an upper turning arm assembly, and the upper turning arm assembly is rotatably connected to the lower turning arm assembly through the turning shaft assembly; a turning positioning system, and the turning positioning system is arranged on a side of the module base close to the lower turning arm assembly, and the turning positioning system includes a positioning assembly and a buffer assembly; the turning method includes correction and turning, and accurately completing the turning action of the turning machine; the turning position of the upper turning arm assembly is positioned by the positioning assembly, and the vibration generated by the upper turning arm assembly from dynamic to static during the turning process is absorbed by the buffer assembly, thereby improving the turning position accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine blade production equipment, and in particular to a wind turbine blade mold turning machine and a turning method thereof. Background Art

[0002] In the field of wind power generation, with the continuous advancement of technology and the growing demand for energy, the size and weight of wind turbine blades are showing a trend of increasing. This development trend aims to improve the power generation efficiency of wind turbines and reduce costs, but it also poses greater challenges to the opening and closing methods of wind turbine blade molds.

[0003] Currently, hydraulic flipping devices are commonly used to open and close wind blade molds. With their powerful driving force and stable performance, hydraulic flipping systems play a vital role in the flipping process. However, as blades continue to increase in size and weight, traditional hydraulic flipping devices are facing increasing technical challenges.

[0004] On the one hand, the cylinders in existing hydraulic tilting systems are typically mounted on either side of the tilting arm plate. While this installation method ensures a certain degree of smooth tilting, as blade size and weight continue to increase, it can easily lead to an imbalance in the left and right forces during tilting. This imbalance not only increases lateral force, affecting the smoothness of the tilting process, but also easily causes the cylinders to produce unusual noises during the tilting process, thus affecting the overall performance and reliability of the system.

[0005] On the other hand, in order to adapt to larger blade molds, the number of frames of the hydraulic flipping device has to be increased accordingly. As the number of frames increases, the flipping synchronization and stability regulated by the hydraulic drive system become more difficult to control.

[0006] Based on this, there is an urgent need to develop a wind turbine blade mold turning machine to meet the opening and closing requirements of wind turbine blade molds in order to adapt to the development trend of wind turbine blades. Summary of the Invention

[0007] The object of the present invention is to provide a fan blade mold turning machine and a turning method thereof to solve at least one of the following technical problems:

[0008] 1. During actual use, it is easy to cause the problem of unbalanced force on the left and right sides;

[0009] 2. As the number of racks increases, it becomes difficult to control the flipping synchronization and stability through the hydraulic drive system.

[0010] The purpose of the present invention can be achieved through the following technical solutions:

[0011] A fan blade mold turning machine, comprising:

[0012] Module base,

[0013] A lower flip arm assembly, the lower flip arm assembly being mounted on top of the module base;

[0014] a flip shaft assembly and an upper flip arm assembly, wherein the upper flip arm assembly is rotatably connected to the lower flip arm assembly via the flip shaft assembly; and

[0015] A flip positioning system, which is arranged on one side of the module base and includes a positioning component and a buffer component;

[0016] The flipping position of the upper flip arm assembly is positioned by the positioning assembly, and the vibration of the upper flip arm assembly generated by the dynamic-static transition during the flipping process is absorbed by the buffer assembly.

[0017] As a further solution of the present invention: the lower flip arm assembly includes two sets of symmetrically arranged lower flip side plates, a first connecting shaft, a second connecting shaft and a support shaft are provided between the two sets of lower flip side plates, a first flip hydraulic cylinder is sleeved on the first connecting shaft, and a second flip hydraulic cylinder is sleeved on the second connecting shaft;

[0018] A cross bar is further provided between the two groups of lower flip side plates, and a hydraulic control valve group is provided on the cross bar. The hydraulic control valve group is connected to the first flip hydraulic cylinder and the second flip hydraulic cylinder.

[0019] As a further solution of the present invention: each set of the lower flip side panels includes two side panels, a limit bar is provided between the two side panels, and the tops of the two side panels are connected to the flip shaft assembly;

[0020] The two sets of lower flip side panels are connected to the upper flip arm assembly through a flip shaft assembly.

[0021] As a further solution of the present invention: the upper flip arm assembly includes two sets of upper flip side plates, and the two sets of upper flip side plates are respectively rotated by the flip shaft assembly and arranged between the two side plates of the lower flip side plate on the corresponding side;

[0022] A third connecting shaft, a fourth connecting shaft and a limit shaft are arranged between the two groups of upper flip side plates. The third connecting shaft is connected to the first flip hydraulic cylinder, and the fourth connecting shaft is connected to the second flip hydraulic cylinder. The upper flip arm assembly is driven to flip through the first flip hydraulic cylinder and the second flip hydraulic cylinder.

[0023] As a further solution of the present invention: the flip shaft assembly includes a main shaft body, the main shaft body is arranged through the two side plates of the lower flip side plate, the main shaft body is sleeved with a bearing, and the two sides of the bearing are symmetrically provided with limiting auxiliary parts;

[0024] A plurality of mounting grooves are provided on one side surface of the position limiting auxiliary component. The plurality of mounting grooves are symmetrically arranged around the center of the circle of the position limiting auxiliary component and are distributed in multiple layers from the inside to the outside. A damping spring is provided in each mounting groove. A transmission ball is connected to the outer end of the damping spring, and the plurality of transmission balls are in elastic contact with the upper flip side plate.

[0025] As a further solution of the present invention: the flip positioning system further comprises a reference plate, wherein the reference plate is installed with the ground as a reference, and the reference plate is consistent with the installation reference of the module base;

[0026] Support plates are symmetrically arranged on the reference plate, and the positioning assembly is arranged between the two support plates.

[0027] As a further solution of the present invention: the positioning assembly includes a positioning shaft 1 and an infrared photoelectric switch 2 that penetrates the two support plates, one end of the positioning shaft 1 is connected to the servo motor, the positioning shaft 1 is arranged through the inner hole of the support shaft, and a turning groove is formed on one side of the support shaft, and a rotating base plate is fixedly sleeved on the positioning shaft 1 and located in the turning groove;

[0028] The second infrared photoelectric switch comprises a second infrared receiver located on the rotating base plate and a second infrared transmitter arranged on the baffle of the upper flip arm assembly.

[0029] As a further solution of the present invention: the flip positioning system also includes a mounting seat and an infrared photoelectric switch, and the infrared photoelectric switch includes an infrared transmitter arranged on the mounting seat and an infrared receiver located at a corresponding position on the reference plate.

[0030] As a further solution of the present invention: the reference plate is further provided with support uprights, and at least two groups of the support uprights are provided, and a receiving shaft is inserted into the inner hole of the limiting shaft;

[0031] The buffer assembly includes a buffer base connected to the inner side of the support pole, an arc-shaped groove is provided on the top of the buffer base, a buffer plate is provided in the arc-shaped groove, and the lowest point of the buffer plate is higher than the lowest point of the support groove provided on the support pole.

[0032] As a further solution of the present invention: a method for turning over the above-mentioned fan blade mold turning machine comprises the following steps:

[0033] Step 1: Calibration: After installation, start the servo motor to drive the mounting base to swing back and forth, aligning the infrared receiver 1 on the reference plate. When the infrared receiver 1 receives the infrared light emitted by the infrared transmitter 1, the servo motor rotates 90 degrees, and the positioning shaft 1 drives the rotating base plate to rotate parallel to the reference plate.

[0034] Step 2, flipping: After the calibration is completed, the first flip hydraulic cylinder and the second flip hydraulic cylinder are operated to flip the upper flip arm assembly. When the infrared receiver 2 receives the infrared ray emitted by the infrared transmitter 2, the operation of the first flip hydraulic cylinder and the second flip hydraulic cylinder is stopped, the bearing is connected to the supporting pole, and the flip is completed.

[0035] Beneficial effects of the present invention:

[0036] 1. The present invention arranges the first and second tilting hydraulic cylinders inside the lower tilting arm assembly, thereby maintaining the tilting torque provided by the first and second tilting hydraulic cylinders stable and preventing drastic pressure fluctuations in the system.

[0037] 2. The present invention sets limiting auxiliary parts on both sides of the bearing. Through the cooperation of multiple sets of transmission balls and vibration-damping springs, the vibration caused by heavy load or imbalance generated during the flipping process is absorbed, thereby reducing the vibration amplitude of the bearing, avoiding the impact on mold closing or opening, and extending the service life of the bearing.

[0038] 3. The present invention positions the flipping process by setting up a flip positioning system, optimizes the synchronization and stability of multiple flipping machines during the flipping process, and reduces the errors caused by the regulation of the hydraulic drive system. The positioning component uses the ground as a reference and is not affected by the size and weight of the mold. The flipping position is accurately positioned, so that the flipping process is no longer limited by the driving accuracy of the first flipping hydraulic cylinder and the second flipping hydraulic cylinder; and the buffer component is preferentially contacted with the receiving shaft, and the buffer plate therein plays the role of buffering and absorbing energy, while buffering and avoiding rigid impact on the support groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The present invention will be further described below with reference to the accompanying drawings.

[0040] Figure 1 This is a schematic diagram of a folded state of a first embodiment of the present invention;

[0041] Figure 2 This is a schematic diagram of the expanded state of the first embodiment of the present invention;

[0042] Figure 3 This is a schematic diagram of the internal structure of the first embodiment of the present invention;

[0043] Figure 4 Schematic diagram of the rotation angles of the first and second tilting hydraulic cylinders in the first embodiment of the present invention;

[0044] Figure 5 This is a schematic structural diagram of the flip shaft assembly in Example 1 of the present invention;

[0045] Figure 6 yes Figure 5 Schematic diagram of the enlarged structure of the middle D area;

[0046] Figure 7 yes Figure 6 Schematic diagram of the enlarged structure of the middle E area;

[0047] Figure 8 This is a schematic diagram of the structure of the second embodiment of the present invention without the buffer component;

[0048] Figure 9 This is a schematic diagram of the overall structure of the second embodiment of the present invention;

[0049] Figure 10 This is a schematic diagram of the expanded structure of the second embodiment of the present invention;

[0050] Figure 11 This is a schematic diagram of the corrected structure of the second embodiment of the present invention;

[0051] Figure 12 This is a schematic structural diagram of a buffer assembly according to a second embodiment of the present invention;

[0052] Figure 13 This is a schematic diagram of the structure of the positioning component in the second embodiment of the present invention;

[0053] Figure 14 This is a schematic diagram of the synchronous coupling structure in the second embodiment of the present invention.

[0054] In the figure: 1. Module base; 11. Column bracket; 12. Mounting bottom plate; 13. Support plate; 14. Reinforcement rib; 15. Wood; 2. Lower flip arm assembly; 21. Lower flip side plate; 22. First connecting shaft; 23. Second connecting shaft; 24. Connecting cross plate; 25. Fixed base plate; 26. Mounting base plate; 27. Hydraulic control valve group; 28. First flip hydraulic cylinder; 29. Second flip hydraulic cylinder; 210. Support shaft; 211. Flip groove; 3. Lower mold connecting frame; 31. Fixed base; 32. Lower mold connecting frame body; 4. Flip shaft assembly; 41. Spindle body; 42. Bearing; 43. Connecting cover plate; 44. Limiting auxiliary part; 45. Ball; 46. Mounting groove 1; 47. Shock-absorbing spring; 48. Transmission ball; 5. Upper flip arm Components; 51. Upper flip side plate; 52. Third connecting axis; 53. Fourth connecting axis; 54. Fixed base axis; 55. Baffle; 56. Limiting axis; 6. Upper mold connecting frame; 61. Connecting base frame; 62. Upper mold connecting frame body; 7. Flip positioning system; 71. Reference plate; 72. Supporting vertical rod; 721. Supporting groove; 73. Supporting plate; 74. Positioning component; 741. Positioning axis one; 742. Mounting seat; 743. Infrared transmitter one; 744. Infrared receiver one; 745. Rotating base plate; 746. Infrared transmitter two; 747. Infrared receiver two; 748. Synchronous connecting shaft; 75. Buffer component; 751. Buffer base; 752. Mounting groove two; 753. Buffer spring; 754. Buffer plate; 76. Supporting shaft.

[0055] A is the angle between the line connecting the center of the second connecting shaft and the center of the fourth connecting shaft and the line connecting the center of the fourth connecting shaft and the center of the flip shaft assembly;

[0056] B is the angle between the line connecting the center of the first connecting axis and the center of the third connecting axis and the line connecting the center of the third connecting axis and the center of the flip axis assembly;

[0057] C is the angle between the line connecting the center of gravity of the load and the center of the flip axis assembly and the horizontal line. DETAILED DESCRIPTION

[0058] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0059] Example 1

[0060] like Figure 1-Figure 7 As shown, this embodiment provides a fan blade mold turning machine, which includes a module base 1 installed on one side of the production line mold according to the design position, a lower turning arm assembly 2 is installed on the top of the module base 1, and an upper turning arm assembly 5 is rotatably connected to the top of the lower turning arm assembly 2 through a turning shaft assembly 4, and one side of the lower turning arm assembly 2 is connected to a lower mold connecting frame 3, and one side of the upper turning arm assembly 5 is connected to an upper mold connecting frame 6;

[0061] Furthermore, the lower mold connecting frame 3 is connected to the lower mold of the fan blade mold, and the upper mold connecting frame 6 is connected to the upper mold of the fan blade mold.

[0062] Among them Figure 1 As shown, when the upper flip arm assembly 5 and the lower flip arm assembly 2 are in the folded state (ie, Figure 1 As the reference perspective, the upper flip arm assembly 5 is located on the left side of the lower flip arm assembly 2), the lower mold connecting frame 3 and the upper mold connecting frame 6 are arranged horizontally and are respectively located on both sides of the module base 1. At this time, the upper mold and the lower mold of the fan blade mold are separated, and the fan blade mold is in the open mold state.

[0063] like Figure 2 As shown, when the upper flip arm assembly 5 and the lower flip arm assembly 2 are in the expanded state (that is, the upper flip arm assembly 5 is located above the lower flip arm assembly 2), the lower mold connecting frame 3 and the upper mold connecting frame 6 are arranged correspondingly up and down, wherein the lower mold connecting frame 3 and the upper mold connecting frame 6 are parallel, and the upper mold connecting frame 6 is located above the lower mold connecting frame 3. At this time, the upper mold and the lower mold of the fan blade mold are merged, and the fan blade mold is in a closed mold state.

[0064] It is important to note that the modular base 1 in this embodiment can be pre-installed on the production line. Other structures can then be installed on top, depending on the needs (number of required flippers), to form the complete flipper. Pre-installing the modular base 1 facilitates the subsequent direct installation of the lower flip arm assembly 2, eliminating the need for alignment during installation. Furthermore, the installation process is split between the modular base 1 and other structures, without interfering with each other, improving overall installation efficiency. Pre-installing the modular base 1 also reduces the number of adjustments required during the installation of the main structure (other structures after removing the modular base 1), facilitating the subsequent turnover of the main structure when adding or reducing the number of flippers or adjusting the spacing between flippers.

[0065] Furthermore, a module base 1 is set at the bottom of the traditional turning machine, and a maintenance area is constructed through the module base 1 to facilitate the subsequent installation, disassembly and maintenance of the internal structure of the entire turning machine by maintenance personnel or maintenance equipment, such as raising the position of the hydraulic control valve group 27 to facilitate the connection and removal of the pipeline.

[0066] Furthermore, if Figure 3 As shown, the above-mentioned module base 1 includes a mounting base plate 12 fixed on the ground of the production line, a column bracket 11 is installed on the mounting base plate 12, and a support plate 13 is welded on both sides of the column bracket 11. The support plate 13 is L-shaped and is inverted on the columns on both sides of the column bracket 11. The support plate 13 cooperates with the column bracket 11 to play the main force-bearing role. A plurality of reinforcement ribs 14 are arranged on the outer side of the support plate 13 to support and reinforce the side of the support plate 13 to ensure the stability of the support of the module base 1.

[0067] Furthermore, a wooden plank 15 is provided on the mounting base plate 12 on the side of the module base 1 close to the upper mold connecting frame 6 to provide certain support to the upper mold connecting frame 6 in the mold opening state, wherein the wooden plank 15 can also be replaced by a structure that can provide support.

[0068] Furthermore, if Figure 1 and Figure 3 As shown, the lower flip arm assembly 2 in this embodiment includes two groups of symmetrically arranged lower flip side plates 21, and the two groups of lower flip side plates 21 are welded together on both sides of the bottom through a connecting cross plate 24, and the bottom of the two groups of lower flip side plates 21 are connected with a first connecting shaft 22 and a second connecting shaft 23, wherein the first connecting shaft 22 and the second connecting shaft 23 are both arranged through the lower flip side plates 21 on both sides, and the first connecting shaft 22 is arranged close to one side of the lower mold connecting frame 3, and a first flip hydraulic cylinder 28 is sleeved on the first connecting shaft 22, and a second flip hydraulic cylinder 29 is sleeved on the second connecting shaft 23. Figure 3As shown, the bottom of the first tilting hydraulic cylinder 28 is sleeved on the first connecting shaft 22 and can rotate around the first connecting shaft 22 , and the bottom of the second tilting hydraulic cylinder 29 is sleeved on the second connecting shaft 23 and can rotate around the second connecting shaft 23 .

[0069] Furthermore, a cross bar is provided between the connecting cross plates 24 on both sides, and a hydraulic control valve group 27 is provided on the cross bar. The hydraulic control valve group 27 is connected to the first flip hydraulic cylinder 28 and the second flip hydraulic cylinder 29 to control the movement of the first flip hydraulic cylinder 28 and the second flip hydraulic cylinder 29, and the connecting cross plate 24 close to the side of the lower mold connecting frame 3 is connected to two groups of fixed base plates 25 through two groups of welding plates. The two groups of fixed base plates 25 are distributed up and down and are on the same vertical plane. The two groups of fixed base plates 25 are fixedly connected to the lower mold connecting frame 3 to realize the installation of the lower mold connecting frame 3.

[0070] It should be noted in this embodiment that the hydraulic control valve group 27 is a prior art and its specific structure will not be described in detail here.

[0071] Further, specifically Figure 3 As shown, mounting base plates 26 are symmetrically provided at both ends of the bottom surface of the two sets of lower flip side panels 21. The two sets of mounting base plates 26 can be welded to the corresponding positions of the two sets of lower flip side panels 21 to achieve integration. The lower flip arm assembly 2 is fixed on the module base 1 through the two sets of mounting base plates 26, and a plurality of sets of bolt fixing positions are provided on the support plate 13 of the module base 1, which can allow fine adjustment of the lateral position of the lower flip arm assembly 2.

[0072] Furthermore, in order to enhance the combined strength of the two sets of lower flip side panels 21, a support shaft 210 is provided between the two sets of lower flip side panels 21. The support shaft 210 is provided close to the lower mold connecting frame 3 to support the two sets of lower flip side panels 21 and enhance the strength.

[0073] It should be noted that in this embodiment, each set of lower flip side panels 21 includes two side panels, and a limiting strip (not shown in the figure) is set between the two side panels for separation and limitation, and as shown in FIG. Figure 5 As shown, a flip axis assembly 4 is provided on the top of the two side panels, and the two sets of lower flip side panels 21 are connected to the upper flip arm assembly 5 through the flip axis assembly 4, and the upper flip arm assembly 5 performs flipping movement around the flip axis assembly 4.

[0074] like Figure 1 and Figure 3 As shown, the above-mentioned lower mold connecting frame 3 includes a fixed base 31 fixedly connected to two groups of fixed base plates 25, and a lower mold connecting frame body 32 is installed on the fixed base 31. The lower mold connecting frame body 32 is connected to the lower mold of the mold. It should be noted here that the entire lower mold of the mold is connected to multiple groups of lower mold connecting frame bodies 32 to jointly realize the closing and opening of the mold.

[0075] Furthermore, if Figure 3 As shown, the upper flip arm assembly 5 in this embodiment includes an upper flip side plate 51, wherein the upper flip side plate 51 is provided with two groups, which are respectively rotated by the flip shaft assembly 4 and arranged between the two side plates of the lower flip side plate 21 on the corresponding side, and a third connecting shaft 52 and a fourth connecting shaft 53 are provided between the two groups of upper flip side plates 51, wherein the third connecting shaft 52 is socketed with the telescopic end of the first flip hydraulic cylinder 28, and the fourth connecting shaft 53 is socketed with the telescopic end of the second flip hydraulic cylinder 29, forming a driving structure to drive the upper flip arm assembly 5 to flip.

[0076] Among them, a fixed base shaft 54 is provided in cooperation with one end of the two sets of upper flip side plates 51 away from the flip axis assembly 4, and there are multiple sets of fixed base shafts 54. The multiple sets of fixed base shafts 54 are arranged in parallel and distributed on the same plane. The multiple sets of fixed base shafts 54 are installed in cooperation with an upper mold connecting frame 6, and the upper mold connecting frame 6 is connected to the upper mold of the mold.

[0077] Furthermore, in order to enhance the combined strength of the two sets of upper flip side plates 51 , a limiting shaft 56 is provided between the two sets of upper flip side plates 51 for limiting support, thereby enhancing the structural strength of the entire upper flip arm assembly 5 .

[0078] like Figure 1 and Figure 3 As shown, the above-mentioned upper mold connecting frame 6 includes a connecting base frame 61 fixedly installed with multiple groups of fixed base shafts 54, and an upper mold connecting frame body 62 is installed on the connecting base frame 61. The upper mold connecting frame body 62 is connected to the upper mold of the mold. It should be noted here that the upper mold of the entire mold is connected to multiple groups of upper mold connecting frame bodies 62 to jointly realize the closing and opening of the mold.

[0079] Furthermore, if Figure 5-Figure 7 As shown, the flip axis assembly 4 in this embodiment includes a main shaft body 41 connected to the top of the lower flip side plate 21, and the main shaft body 41 is arranged to pass through the two side plates of the lower flip side plate 21. The main shaft body 41 extends from the inner side to the outer side of the lower flip side plate 21, and is connected to a connecting cover plate 43 on the outer side. A bearing 42 is sleeved on the area of the main shaft body 41 between the two side plates. The bearing 42 is connected to the upper flip side plate 51 in the upper flip arm assembly 5 to realize the flipping movement of the upper flip side plate 51.

[0080] And because the mold size and weight of the fan blade are large, the change of external load during the flipping process will also affect the vibration amplitude of the bearing. When the load increases, the contact pressure between the rolling element and the raceway will also increase, resulting in greater vibration. In addition, unbalanced or sudden changes in load may also cause vibration of the bearing. Therefore, in order to further reduce vibration, limit auxiliary parts 44 are symmetrically provided on both sides of the bearing 42. The limit auxiliary parts 44 are connected to the rotating ring structure of the upper flip side plate 51 of the bearing 42 with a gap, as shown in FIG. Figure 6 and Figure 7 As shown, the limiting auxiliary part 44 is in a circular shape, and the main shaft body 41 is arranged through the center of the limiting auxiliary part 44. A plurality of mounting grooves 46 are provided on the side surface of the limiting auxiliary part 44 close to the upper flip side plate 51. The plurality of mounting grooves 46 are symmetrically arranged around the center of the circle of the limiting auxiliary part 44, and are distributed in multiple layers from the inside to the outside. A damping spring 47 is provided in each mounting groove 46, and a transmission ball 48 is connected to the outer end of the damping spring 47. The plurality of transmission balls 48 are in elastic contact with the upper flip side plate 51. Through the cooperation of the plurality of transmission balls 48 and the damping springs 47, the vibration caused by heavy load or imbalance generated during the flipping process is absorbed, thereby reducing the vibration amplitude of the bearing 42, avoiding affecting the mold closing or opening, and extending the service life of the bearing.

[0081] Furthermore, a ball 45 is provided on the outer edge section of the limiting auxiliary component 44, which directly contacts the upper flip side plate 51 through the ball 45 to support the rotating part of the upper flip side plate 51 (the connection area between the upper flip side plate 51 and the flip shaft assembly 4), so that the upper flip side plate 51 is more stable during the flipping process and the influence of lateral force is reduced.

[0082] It should also be noted that in this embodiment, Figure 4 As shown, in the same vertical plane, in this embodiment, the angle between the line connecting the center of the second connecting axis 23 and the center of the fourth connecting axis 53 and the line connecting the center of the fourth connecting axis 53 and the center of the flip axis assembly 4 is A; and the angle between the line connecting the center of the first connecting axis 22 and the center of the third connecting axis 52 and the line connecting the center of the third connecting axis 52 and the center of the flip axis assembly 4 is B, and the angle between the line connecting the center of gravity of the load and the center of the flip axis assembly 4 and the horizontal line is C;

[0083] During the flipping process, maintaining the load's center of gravity within a narrow flip angle range helps ensure balanced force on the flipping device, reduces wear and failure rates, and extends its service life. In actual applications, different cargo or workpieces may have different flip angle requirements. To meet the flipping requirements of most cargo while ensuring the safety and stability of the flipping device, existing flipping device designs require that the angle C (the flip angle of the load's center of gravity) between the line connecting the load's center of gravity, the center of the flip axis assembly 4, and the horizontal line must satisfy -15° ≤ C ≤ 15°.

[0084] In the mold closing state, since the load center of gravity positions of different molds are different, in order to ensure stability during the flipping process, it is necessary to make the load force arm of the load center of gravity during the flipping process collinear with the flip force arm formed by the first flip hydraulic cylinder 28 and the second flip hydraulic cylinder 29. Calculated with -15°≤C≤15, it can be obtained that 40°≤|AB|≤60°, thereby limiting the installation posture of the two flip cylinders.

[0085] By rotating the first and second tilting hydraulic cylinders 28 and 29 at a difference in angle (ie, 40°≤|AB|≤60°), the tilting torque provided by the first and second tilting hydraulic cylinders 28 and 29 remains stable, thus preventing the system from experiencing severe pressure fluctuations.

[0086] Example 2

[0087] Due to the irregular shapes of the fan blades at various positions, the weight distribution at various positions of the mold is also uneven. When multiple sets of flipping devices flip the upper mold of the mold, the flipping devices at different positions are subjected to uneven forces. During flipping, the flipping devices at heavier positions are prone to bear greater pressure and load. In addition, the hydraulic system in the flipping device with heavier load will produce greater friction, leakage and deformation when carrying heavier loads, thereby affecting the control accuracy and stability of the system.

[0088] Therefore, in order to adapt to larger blade molds, when the number of frames of the hydraulic flipping device is further increased, the hydraulic drive system will further deviate from the flipping angles of multiple flipping devices, which may easily cause a single flipping device to rotate at a larger angle, and go out of position during the rotation process, causing the mold to shake or deflect, and thus causing twisting damage to the blade.

[0089] Based on this, this embodiment, on the basis of the first embodiment, positions the flipping process by setting a flip positioning system 7, optimizes the synchronization and stability of the flipping process of multiple groups of flippers, and reduces the error caused by the control of the hydraulic drive system.

[0090] like Figures 8-11As shown, the flip positioning system 7 in this embodiment includes a reference plate 71 installed on the ground, and the reference plate 71 is fitted with a mounting base plate 12 on the same side to ensure that the reference plate 71 is consistent with the reference surface of the module base 1 (both use the ground as the installation reference, and the lower mold is also used as a reference). Support plates 73 are symmetrically arranged at both ends of the top of the reference plate 71, and a positioning component 74 is arranged between the two support plates 73. The flipping position is precisely positioned by the positioning component 74, so that the flipping process is no longer limited by the driving accuracy of the first flip hydraulic cylinder 28 and the second flip hydraulic cylinder 29 (that is, when multiple mold flippers perform flipping movements, the flipping position is positioned by the positioning component 74. Even if the corresponding mold flipper is affected by the load and the flipping position of the hydraulic system deviates, the flipping can continue or stop in advance through the control of the positioning component 74, ensuring that the flipping position is more accurate).

[0091] Specific as Figures 9-11 As shown, the positioning assembly 74 in this embodiment includes a positioning shaft 741 that passes through the two support plates 73. The positioning shaft 741 can be driven by a servo motor installed on one side of the support plate 73 (not shown in the figure). The positioning shaft 741 is set through the inner hole of the support shaft 210, and in this embodiment, the support shaft 210 is provided with a flip groove 211 on the side close to the lower mold connecting frame 3. The part of the positioning shaft 741 located in the flip groove 211 is fixedly sleeved with a rotating base plate 745, and an infrared photoelectric switch 2 is provided on the rotating base plate 745. The infrared photoelectric switch 2 includes an infrared receiver 2 747 provided on the rotating base plate 745 and an infrared transmitter 2 746 provided on the baffle 55. The infrared receiver 2 747 is controlled by whether it receives the infrared light emitted by the infrared transmitter 2 746, so as to realize precise control of the flip position of the upper flip arm assembly 5.

[0092] Furthermore, in order to avoid the installation of each structure affecting the accuracy of the already installed positioning assembly 74, the positioning assembly 74 is not positioned during installation, and a unified positioning correction is performed after installation. Figure 10 As shown, a mounting base 742 is installed at one end of the positioning shaft 741, and an infrared photoelectric switch 1 is installed on the mounting base 742. The infrared photoelectric switch 1 includes an infrared transmitter 1 743 set on the mounting base 742 and an infrared receiver 1 744 located at a corresponding position on the reference plate 71. The position of the rotating substrate 745 is controlled by whether the infrared receiver 1 744 receives the infrared light emitted by the infrared transmitter 1 743.

[0093] It should be noted that in this embodiment, the infrared transmitter 1 743 and the infrared receiver 2 747 are perpendicular to each other.

[0094] It should be noted in this embodiment that the infrared photoelectric switch 1, the infrared photoelectric switch 2 and the hydraulic control valve group 27 are all connected to the external controller and are controlled by the external controller.

[0095] Since the positioning assembly 74 is based on the ground and is not affected by the size and weight of the mold (that is, the size and weight of the mold have no effect on the position of the positioning assembly 74), the positioning assembly 74 in this embodiment can accurately control the flipping position based on the ground (the lower mold is also based on the ground), thereby controlling the position of the upper mold and improving the accuracy of mold closing or opening; and multiple sets of mold flipping machines are all based on the ground, which also makes the flipping movement more synchronized and stable.

[0096] In this embodiment, the calibration method of the positioning assembly 74 is as follows: after installation, the controller starts the servo motor to drive the mounting base 742 to swing back and forth, and the infrared receiver 1 744 on the reference plate 71 is aligned. When the infrared receiver 1 744 receives the infrared light emitted by the infrared transmitter 1 743, the controller controls the servo motor to rotate counterclockwise (in degrees). Figure 10 The left side in the middle is the reference surface) rotated 90 degrees, the positioning shaft 741 drives the rotating base plate 745 to rotate until it is parallel to the reference plate 71, completing the calibration.

[0097] In order to further improve the turning accuracy of multiple mold turning machines, such as Figure 13 and Figure 14 As shown, this embodiment can also be achieved by allowing multiple groups of mold turning machines to share a positioning component 74, wherein the reference plate 71 of the positioning component 74 is extended, all the module bases 1 are connected in series, and multiple groups of support plates 73 are provided on the reference plate 71 (wherein at least two groups are symmetrically provided on both sides of each group of module bases 1), and all the positioning shafts 741 are connected in series through the synchronous connecting shaft 748 to form an integral positioning shaft mechanism, and then synchronously driven by the servo motor, so that the multiple groups of rotating base plates 745 can be uniformly positioned, thereby regulating the turning accuracy of all turning machines.

[0098] It is only necessary to install the mounting seat 742 and the infrared photoelectric switch 1 on the positioning shaft 741 connected to the servo motor side, and the other positioning shafts 741 do not need to be set, and the adjacent positioning shafts 741 are connected by a synchronous connecting shaft 748. The synchronous connecting shaft 748 has gears at both ends, and the corresponding positioning shafts 741 have sockets at both ends. Through the connection of the gears and the sockets, multiple groups of positioning shafts 741 and synchronous connecting shafts 748 are connected into a whole.

[0099] Furthermore, a gap can be set between the inner hole of the positioning shaft 741 and the support shaft 210 to eliminate the influence on the reference caused by assembly error.

[0100] Furthermore, since the upper flip arm assembly 5 needs to hover for a certain period of time before the mold can be closed after driving the upper mold to flip, in order to support the upper flip arm assembly 5 after flipping, this embodiment further provides two sets of support rods 72 on the reference plate 71. The two sets of support rods 72 are symmetrically arranged about the module base 1, and a receiving shaft 76 is inserted into the inner hole of the limit shaft 56. The receiving shaft 76 is as shown in FIG. Figure 10 and Figure 11 As shown, after flipping, it contacts with two groups of support poles 72 to form support, and since the two groups of support poles 72 are also based on the reference plate 71, the support position is more accurate, avoiding the support structure from affecting the positioning accuracy.

[0101] It should also be noted that in this embodiment, due to the heavy weight of the mold, energy conversion will occur after the mold is turned from dynamic to static (when supported), which can easily cause slight vibration. In this embodiment, a buffer component 75 is provided in the flip positioning system 7 to further reduce the impact on the positioning accuracy. The specific structure of the buffer component 75 is as follows: Figure 12 As shown, it includes a buffer base 751 connected to the inner side of the support upright 72, the buffer base 751 has an arc groove on the top, and multiple groups of mounting grooves 752 are provided at the bottom of the arc groove, and buffer springs 753 are installed in the mounting grooves 752. The tops of the multiple buffer springs 753 are matched with a buffer plate 754, and the buffer plate 754 is arc-shaped and adapted to the arc groove. It should be noted that the buffer plate 754 is higher than the support groove 721 on the support upright 72 in the initial state, so that the receiving shaft 76 in the upper flip arm assembly 5 that is about to stop flipping will preferentially contact the buffer plate 754 to play a role in buffering and absorbing energy, while buffering and avoiding rigid impact on the support groove 721.

[0102] Example 3

[0103] This embodiment provides a method for turning over a fan blade mold turning machine based on the second embodiment, comprising the following steps:

[0104] Step 1: Calibration: After the installation is completed, the servo motor is started by the controller to drive the mounting base 742 to swing back and forth, aligning the infrared receiver 1 744 on the reference plate 71. When the infrared receiver 1 744 receives the infrared light emitted by the infrared transmitter 1 743, the controller controls the servo motor to rotate 90 degrees counterclockwise, and the positioning shaft 1 741 drives the rotating base plate 745 to rotate parallel to the reference plate 71.

[0105] Step 2, flipping: After the calibration is completed, the controller controls the operation of the first flip hydraulic cylinder 28 and the second flip hydraulic cylinder 29 to flip the upper flip arm assembly 5. When the infrared receiver 2 747 receives the infrared ray emitted by the infrared transmitter 2 746, the controller stops the operation of the first flip hydraulic cylinder 28 and the second flip hydraulic cylinder 29, and the supporting shaft 76 is supported on the supporting pole 72 to complete the flip.

[0106] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as limiting the present invention. In addition, "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0107] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0108] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A fan blade mold turning machine, characterized in that: include; Module base (1), A lower flip arm assembly (2), the lower flip arm assembly (2) being mounted on top of the module base (1); The lower flip arm assembly (2) comprises two groups of symmetrically arranged lower flip side plates (21), a first connecting shaft (22), a second connecting shaft (23) and a support shaft (210) are arranged between the two groups of lower flip side plates (21), a first flip hydraulic cylinder (28) is sleeved on the first connecting shaft (22), and a second flip hydraulic cylinder (29) is sleeved on the second connecting shaft (23); A flip shaft assembly (4) and an upper flip arm assembly (5), wherein the upper flip arm assembly (5) is rotatably connected to the lower flip arm assembly (2) via the flip shaft assembly (4); and A flip positioning system (7), the flip positioning system (7) being arranged on one side of the module base (1), the flip positioning system (7) comprising a positioning component (74) and a buffer component (75); The flipping position of the upper flip arm assembly (5) is positioned by the positioning assembly (74), and the vibration generated by the upper flip arm assembly (5) during the flipping process due to the dynamic rotation and static rotation is absorbed by the buffer assembly (75); The flip positioning system (7) further comprises a reference plate (71), wherein the reference plate (71) takes the ground as an installation reference, and the reference plate (71) is consistent with the installation reference of the module base (1); Support plates (73) are symmetrically arranged on the reference plate (71), and the positioning assembly (74) is arranged between the two support plates (73); The positioning assembly (74) includes a positioning shaft (741) passing through the two support plates (73) and an infrared photoelectric switch (2). One end of the positioning shaft (741) is connected to the servo motor. The positioning shaft (741) passes through the inner hole of the support shaft (210). A turning groove (211) is provided on one side of the support shaft (210). A rotating base plate (745) is fixedly sleeved on the positioning shaft (741) and located in the turning groove (211). The second infrared photoelectric switch comprises a second infrared receiver (747) located on a rotating substrate (745) and a second infrared transmitter (746) provided on a baffle (55) of an upper flip arm assembly (5); When the upper flip arm assembly (5) flips until the second infrared receiver (747) receives the infrared ray emitted by the second infrared transmitter (746), the operation of the first flip hydraulic cylinder (28) and the second flip hydraulic cylinder (29) is stopped; The flip positioning system (7) further includes a mounting seat (742) and an infrared photoelectric switch. The mounting seat (742) is mounted on one end of the positioning shaft (741). The infrared photoelectric switch (742) is mounted on the mounting seat (742). The infrared photoelectric switch (742) includes an infrared transmitter (743) disposed on the mounting seat (742) and an infrared receiver (744) located at a corresponding position on the reference plate (71). After the installation is completed, the servo motor is started to drive the mounting base (742) to swing back and forth, aligning the infrared receiver 1 (744) on the reference plate (71). When the infrared receiver 1 (744) receives the infrared ray emitted by the infrared transmitter 1 (743), the servo motor rotates ninety degrees, and the positioning shaft 1 (741) drives the rotating base plate (745) to rotate until it is parallel to the reference plate (71).

2. A fan blade mold turning machine according to claim 1, characterized in that: A crossbar is provided between the two sets of lower flip side plates (21), and a hydraulic control valve group (27) is provided on the crossbar. The hydraulic control valve group (27) is connected to the first flip hydraulic cylinder (28) and the second flip hydraulic cylinder (29).

3. A fan blade mold turning machine according to claim 2, characterized in that: Each set of the lower flip side panels (21) includes two side panels, a limiting strip is provided between the two side panels, and the tops of the two side panels are connected to the flip shaft assembly (4); Both sets of lower flip side plates (21) are connected to the upper flip arm assembly (5) via the flip shaft assembly (4).

4. A fan blade mold turning machine according to claim 2 or 3, characterized in that: The upper flip arm assembly (5) comprises two groups of upper flip side plates (51), and the two groups of upper flip side plates (51) are respectively rotatably arranged between two side plates of the lower flip side plate (21) on the corresponding side via the flip shaft assembly (4); A third connecting shaft (52), a fourth connecting shaft (53) and a limit shaft (56) are provided between the two groups of upper flip side plates (51); the third connecting shaft (52) is connected to the first flip hydraulic cylinder (28); the fourth connecting shaft (53) is connected to the second flip hydraulic cylinder (29); and the upper flip arm assembly (5) is driven to flip via the first flip hydraulic cylinder (28) and the second flip hydraulic cylinder (29).

5. A fan blade mold turning machine according to claim 4, characterized in that: The flip shaft assembly (4) includes a main shaft body (41), the main shaft body (41) is arranged to pass through the two side plates of the lower flip side plate (21), a bearing (42) is sleeved on the main shaft body (41), and limiting auxiliary parts (44) are symmetrically arranged on both sides of the bearing (42); A plurality of mounting grooves (46) are provided on one side of the position limiting auxiliary component (44). The plurality of mounting grooves (46) are symmetrically arranged around the center of the circle of the position limiting auxiliary component (44) and are distributed in multiple layers from the inside to the outside. A damping spring (47) is provided in each mounting groove (46). The outer end of the damping spring (47) is connected to a transmission ball (48). The plurality of transmission balls (48) are in elastic contact with the upper flip side plate (51).

6. A fan blade mold turning machine according to claim 5, characterized in that: The reference plate (71) is further provided with support uprights (72), and at least two groups of the support uprights (72) are provided. A receiving shaft (76) is inserted into the inner hole of the limiting shaft (56); The buffer assembly (75) comprises a buffer base (751) connected to the inner side of the support vertical rod (72); an arc-shaped groove is provided on the top of the buffer base (751); a buffer plate (754) is provided in the arc-shaped groove; the lowest point of the buffer plate (754) is higher than the lowest point of the support groove (721) provided on the support vertical rod (72).

7. A method for turning over a fan blade mold turning machine according to claim 6, characterized in that: The following steps are involved: Step 1, calibration: After the installation is completed, the servo motor is started to drive the mounting base (742) to swing back and forth, aligning the infrared receiver 1 (744) on the reference plate (71). When the infrared receiver 1 (744) receives the infrared ray emitted by the infrared transmitter 1 (743), the servo motor rotates ninety degrees, and the positioning shaft 1 (741) drives the rotating base plate (745) to rotate until it is parallel to the reference plate (71); Step 2, flipping: After the calibration is completed, the first flip hydraulic cylinder (28) and the second flip hydraulic cylinder (29) are operated to flip the upper flip arm assembly (5). When the infrared receiver (747) receives the infrared ray emitted by the infrared transmitter (746), the first flip hydraulic cylinder (28) and the second flip hydraulic cylinder (29) are stopped, and the receiving shaft (76) is received on the supporting rod (72), and the flip is completed.

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