Fan blade mold turnover machine and turnover method thereof

Abstract

The invention discloses a fan blade mold turnover machine and a turnover method thereof, and relates to the technical field of wind power blade production equipment.The fan blade mold turnover machine comprises a module base and a lower turnover arm assembly, and the lower turnover arm assembly is installed at the top of the module base; the upper overturning arm assembly is rotationally connected to the lower overturning arm assembly through the overturning shaft assembly; the upper overturning arm assembly is rotationally connected to the lower overturning arm assembly through the overturning shaft assembly; the turnover positioning system is arranged on the side, close to the lower turnover arm assembly, of the module base, and the turnover positioning system comprises a positioning assembly and a buffering assembly; the turnover method comprises the steps of correction and turnover, and the turnover action of the turnover machine is accurately completed. The overturning position of the upper overturning arm assembly is positioned through the positioning assembly, vibration generated by the upper overturning arm assembly from dynamic rotation to static rotation in the overturning process is absorbed through the buffering assembly, and the overturning position precision is improved.

Description

Technical Field

[0001] The 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 a higher challenge to the opening and closing methods of wind turbine blade molds.

[0003] At present, the hydraulic flip device is commonly used in the opening and closing of fan blade molds. The hydraulic flip system plays a vital role in the flipping process of fan blade molds with its powerful driving force and stable performance. However, with the continuous increase in blade size and weight, traditional hydraulic flip devices are also facing more and more technical difficulties.

[0004] On the one hand, the oil cylinders in the existing hydraulic flipping system are usually installed on both sides of the flip arm plate. Although this installation method ensures the flipping process to a certain extent, as the blade size and weight continue to increase, it is easy to cause the left and right forces to be unbalanced during the actual use. This imbalance will not only increase the lateral force and affect the stability of the flipping process, but also easily cause the oil cylinder to produce abnormal noise during the flipping process, thereby affecting the overall performance and reliability of the system.

[0005] On the other hand, in order to accommodate 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, it is urgent to develop a wind turbine blade mold flipping machine to meet the opening and closing needs of wind turbine blade molds 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: 1. In actual use, it is easy to cause the problem of unbalanced force on the left and right sides; 2. As the number of racks increases, it becomes difficult to control the flipping synchronization and stability through the hydraulic drive system.

[0008] The purpose of the present invention can be achieved through the following technical solutions: A fan blade mold turning machine, comprising: Module base, A lower flip arm assembly, the lower flip arm assembly being mounted on the top of the module base; 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 A flip positioning system, which is arranged on one side of the module base and includes a positioning component and a buffer component; 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 rotation and static rotation during the flipping process is absorbed by the buffer assembly.

[0009] As a further solution of the present invention: the lower flip arm assembly includes two groups of symmetrically arranged lower flip side plates, a first connecting shaft, a second connecting shaft and a supporting shaft are arranged between the two groups 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; A cross bar is also arranged between the two groups of lower flip side plates, and a hydraulic control valve group is arranged on the cross bar. The hydraulic control valve group is connected to the first flip hydraulic cylinder and the second flip hydraulic cylinder.

[0010] As a further solution of the present invention: each group of the lower flip side panels includes two side panels, a limit strip is arranged between the two side panels, and the tops of the two side panels are connected to the flip shaft assembly; The two groups of lower flip side plates are connected to the upper flip arm assembly through the flip shaft assembly.

[0011] 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 and arranged between two side plates of the lower flip side plate on the corresponding side through the flip shaft assembly; 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, the fourth connecting shaft is connected to the second flip hydraulic cylinder, and the upper flip arm assembly is driven to flip by the first flip hydraulic cylinder and the second flip hydraulic cylinder.

[0012] 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, a bearing is sleeved on the main shaft body, and limited auxiliary parts are symmetrically arranged on both sides of the bearing; A plurality of mounting grooves are provided on the side surface of one side 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. The plurality of transmission balls are in elastic contact with the upper flip side plate.

[0013] As a further solution of the present invention: the flip positioning system further comprises a reference plate, wherein the reference plate takes the ground as the installation reference, and the reference plate is consistent with the installation reference of the module base; Support plates are symmetrically arranged on the reference plate, and the positioning assembly is arranged between the two support plates.

[0014] 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 flip groove is opened on one side of the support shaft, and a rotating base plate is fixedly sleeved on the positioning shaft 1 and located in the flip groove; The second infrared photoelectric switch comprises a second infrared receiver located on the rotating substrate and a second infrared transmitter arranged on the baffle of the upper flip arm assembly.

[0015] 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.

[0016] As a further solution of the present invention: the reference plate is further provided with supporting uprights, and at least two groups of the supporting uprights are provided, and a receiving shaft is inserted into the inner hole of the limiting shaft; The buffer assembly includes a buffer base connected to the inner side of the support pole, an arc groove is formed on the top of the buffer base, a buffer plate is arranged in the arc groove, and the lowest point of the buffer plate is higher than the lowest point of the support groove formed on the support pole.

[0017] 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: Step 1: Calibration: After the installation is completed, start the servo motor to drive the mounting base to swing back and forth, and align 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 substrate to rotate parallel to the reference plate. 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, and the bearing is connected to the supporting pole to complete the flipping.

[0018] Beneficial effects of the present invention: 1. The present invention arranges the first flip hydraulic cylinder and the second flip hydraulic cylinder inside the lower flip arm assembly, so that the flip torque provided by the first flip hydraulic cylinder and the second flip hydraulic cylinder remains stable, preventing the system from experiencing drastic pressure fluctuations.

[0019] 2. The present invention arranges limiting auxiliary parts on both sides of the bearing, and absorbs the vibration caused by heavy load or imbalance during the flipping process through the cooperation of multiple sets of transmission balls and shock-absorbing springs, thereby reducing the vibration amplitude of the bearing, avoiding the impact on mold closing or mold opening, and extending the service life of the bearing.

[0020] 3. The present invention positions the flipping process by setting a flipping 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 a role in buffering and absorbing energy, while buffering and avoiding rigid impact on the support groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 is a schematic diagram of a folded state of a first embodiment of the present invention; Figure 2 is a schematic diagram of the unfolded state of the first embodiment of the present invention; Figure 3 It is a schematic diagram of the internal structure of the first embodiment of the present invention; Figure 4 Schematic diagram of the rotation angles of the first flip hydraulic cylinder and the second flip hydraulic cylinder in the first embodiment of the present invention; Figure 5 is a schematic diagram of the structure of the flip shaft assembly in the first embodiment of the present invention; Figure 6 yes Figure 5 Schematic diagram of the enlarged structure of the middle D area; Figure 7 yes Figure 6 Schematic diagram of the enlarged structure of the middle E area; Figure 8 This is a schematic diagram of the structure of the second embodiment of the present invention in which the buffer component is removed; Fig. 9 It is a schematic diagram of the overall structure of the second embodiment of the present invention; Fig.10 is a schematic diagram of the expanded structure of the second embodiment of the present invention; Fig.11 is a schematic diagram of the corrected structure of Embodiment 2 of the present invention; Fig.12 is a schematic diagram of the structure of a buffer assembly according to a second embodiment of the present invention; Fig.13 It is a partial structural diagram of the positioning component in the second embodiment of the present invention; Fig.14 It is a schematic diagram of the synchronous coupling structure in the second embodiment of the present invention.

[0023] In the figure: 1. Module base; 11. Column bracket; 12. Mounting bottom plate; 13. Support plate; 14. Reinforcement rib plate; 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. Main shaft body; 42. Bearing; 43. Connecting cover plate; 44. Limiting auxiliary part; 45. Ball; 46. Mounting groove 1; 47. Damping 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, limit axis; 6, upper mold connecting frame; 61, connecting base frame; 62, upper mold connecting frame body; 7, flip positioning system; 71, reference plate; 72, support vertical rod; 721, support groove; 73, support 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, receiving shaft.

[0024] 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; 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; 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

[0025] 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Embodiment 1 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, 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 a lower mold connecting frame 3 is connected to one side of the lower turning arm assembly 2, and an upper mold connecting frame 6 is connected to one side of the upper turning arm assembly 5; 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.

[0027] Among them Figure 1 As shown, when the upper flip arm assembly 5 and the lower flip arm assembly 2 are in a folded state (i.e., 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 horizontally arranged 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 an open mold state.

[0028] 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 correspondingly arranged 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.

[0029] It should be noted in this embodiment that the module base 1 in this embodiment can also be pre-installed on the production line, and then other structures can be installed on it according to the needs (the number of flip machines required) to form the whole flip machine. By pre-installing the module base 1, it is convenient to directly install the lower flip arm assembly 2 later, and there is no need to mark the position during installation. And the installation process is split (module base 1 installation and other structure installation) without affecting each other, thereby improving the overall installation efficiency. At the same time, pre-installing the module base 1 also reduces the correction steps during the installation of the main structure (other structures after removing the module base 1), which is convenient for the turnover of the main structure when the number of flip machines is increased or decreased or the spacing between flip machines is adjusted.

[0030] Furthermore, a module base 1 is set at the bottom of the traditional turning machine, and a maintenance area is constructed by 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 lifting the position of the hydraulic control valve group 27 to facilitate the connection and removal of the pipeline.

[0031] 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.

[0032] Furthermore, a wooden plank 15 is provided on the mounting base plate 12 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 may also be replaced by a structure that can provide support.

[0033] 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 at both sides of the bottom through a connecting cross plate 24, and the two groups of lower flip side plates 21 are connected to the first connecting shaft 22 and the second connecting shaft 23 at the bottom, 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, as shown in the specific Figure 3 As 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 .

[0034] Furthermore, a cross bar is arranged between the connecting cross plates 24 on both sides, and a hydraulic control valve group 27 is arranged 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 with 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.

[0035] It should be noted in this embodiment that the hydraulic control valve group 27 is a prior art, and the specific structure is not described in detail here.

[0036] Furthermore, specifically Figure 3As shown, mounting base plates 26 are symmetrically arranged at both ends of the bottom surfaces 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 to the module base 1 through the two sets of mounting base plates 26, and a plurality of sets of bolt fixing positions are arranged on the support plate 13 of the module base 1, which can allow the lateral position of the lower flip arm assembly 2 to be fine-tuned.

[0037] Furthermore, in order to enhance the combined strength of the two groups of lower flip side plates 21, a support shaft 210 is provided between the two groups of lower flip side plates 21. The support shaft 210 is provided close to the lower mold connecting frame 3 to support the two groups of lower flip side plates 21 and enhance the strength.

[0038] 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 arranged between the two side panels for separation and limiting. Figure 5 As shown, a flip shaft 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 shaft assembly 4, and the upper flip arm assembly 5 performs a flipping movement around the flip shaft assembly 4.

[0039] 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.

[0040] 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 and arranged between the two side plates of the lower flip side plate 21 on the corresponding side through the flip shaft assembly 4, and a third connecting shaft 52 and a fourth connecting shaft 53 are arranged between the two groups of upper flip side plates 51, wherein the third connecting shaft 52 is sleeved with the telescopic end of the first flip hydraulic cylinder 28, and the fourth connecting shaft 53 is sleeved with the telescopic end of the second flip hydraulic cylinder 29, so as to form a driving structure to drive the upper flip arm assembly 5 to flip.

[0041] Among them, a fixed base shaft 54 ​​is arranged in cooperation with one end of the two sets of upper flip side plates 51 away from the flip axis assembly 4, and multiple sets of fixed base shafts 54 are arranged, and 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.

[0042] Furthermore, in order to enhance the combined strength of the two groups of upper flip side plates 51 , a limiting shaft 56 is provided between the two groups of upper flip side plates 51 for limiting support, thereby enhancing the structural strength of the entire upper flip arm assembly 5 .

[0043] 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.

[0044] 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 passes 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 in the area where the main shaft body 41 is located 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.

[0045] 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 the vibration, the limit auxiliary parts 44 are symmetrically arranged on both sides of the bearing 42. The limit auxiliary parts 44 are connected to the rotating ring structure gap of the upper flip side plate 51 of the bearing 42, as shown in the following figure. 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 arranged 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 the influence on the mold closing or opening, and extending the service life of the bearing.

[0046] 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, thereby supporting 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.

[0047] 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 load center of gravity and the center of the flip axis assembly 4 and the horizontal line is C;

[0048] During the flipping process, keeping the load center of gravity within a small flip angle range helps ensure that the flip device is balanced, and can also reduce the wear and failure rate of the flip device and extend its service life. In actual applications, different goods or workpieces may have different requirements for flip angles. In order to meet the flipping requirements of most goods and ensure the safety and stability of the flip device, the existing flip device design requires that the angle C (the flip angle of the load center of gravity) between the center line of the load center of gravity and the flip axis assembly 4 and the horizontal line meets -15°≤C≤15°.

[0049] 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 flipping 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.

[0050] The tilting torque provided by the first tilting hydraulic cylinder 28 and the second tilting hydraulic cylinder 29 is kept stable by the difference in the rotation angles (ie 40°≤|AB|≤60°) between the first tilting hydraulic cylinder 28 and the second tilting hydraulic cylinder 29, thereby preventing the system from experiencing drastic pressure fluctuations.

[0051] Embodiment 2 Due to the irregular shapes of various positions of the fan blades, the weight distribution of 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 with heavier weight 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.

[0052] 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 too large, and go offside during the rotation process, causing the mold to shake or sway, and thus causing twisting damage to the blade.

[0053] Based on this, this embodiment, on the basis of the first embodiment, positions the flipping process by setting a flipping positioning system 7, optimizes the synchronization and stability of the flipping process of multiple groups of flipping machines, and reduces the error caused by the regulation of the hydraulic drive system.

[0054] like Figure 8-Figure 11 As 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), and 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 accurately 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).

[0055] Specific as Figure 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 arranged through the inner hole of the support shaft 210, and in this embodiment, a flip groove 211 is opened on the side of the support shaft 210 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 arranged on the rotating base plate 745. The infrared photoelectric switch 2 includes an infrared receiver 2 747 arranged on the rotating base plate 745 and an infrared transmitter 2 746 arranged 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.

[0056] Furthermore, in order to prevent the installation of each structure from 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. Fig.10As shown, a mounting seat 742 is installed at one end of the positioning shaft 741, and an infrared photoelectric switch 1 is installed on the mounting seat 742. The infrared photoelectric switch 1 includes an infrared transmitter 1 743 arranged on the mounting seat 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 rays emitted by the infrared transmitter 1 743.

[0057] It should be noted that in this embodiment, the infrared transmitter 1 743 and the infrared receiver 2 747 are perpendicular to each other.

[0058] 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.

[0059] Since the positioning component 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 component 74), the positioning component 74 in this embodiment can use the ground as a reference (the lower mold is also based on the ground) to accurately control the flipping position, 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.

[0060] 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 seat 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 swing counterclockwise (in Fig.10 The left side in the middle is the reference plane) and rotates 90 degrees. The positioning shaft 741 drives the rotating base plate 745 to rotate until it is parallel to the reference plate 71, and the calibration is completed.

[0061] In order to further improve the turning accuracy of multiple mold turning machines, such as Fig.13 and Fig.14 As shown, this embodiment can also be achieved by making multiple groups of mold turning machines 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 arranged on the reference plate 71 (wherein at least two groups are symmetrically arranged on both sides of each group of module bases 1), and all the positioning shafts 741 are connected in series through a synchronous connecting shaft 748 to form an integral positioning shaft mechanism, and then synchronously driven by a servo motor, so that multiple groups of rotating base plates 745 can be uniformly positioned, thereby regulating the turning accuracy of all turning machines.

[0062] It is only necessary to install a mounting seat 742 and an infrared photoelectric switch 1 on the positioning shaft 741 connected to one side of the servo motor, and other positioning shafts 741 do not need to be set, and adjacent positioning shafts 741 are connected by a synchronous coupling 748, and the two ends of the synchronous coupling 748 are provided with splines, and the two ends of the corresponding positioning shafts 741 are provided with sockets. Through the connection between the splines and the sockets, multiple groups of positioning shafts 741 and synchronous couplings 748 are connected into a whole.

[0063] Furthermore, the inner holes of the positioning shaft 741 and the support shaft 210 can also be set with a gap to eliminate the influence on the reference caused by assembly errors.

[0064] Furthermore, since the upper flip arm assembly 5 needs to hover for a certain period of time before the upper mold can be closed after flipping, in order to support the upper flip arm assembly 5 after flipping, the present embodiment further provides two sets of support vertical rods 72 on the reference plate 71, and the two sets of support vertical 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, and the receiving shaft 76 is as shown in FIG. Fig.10 and Fig.11 As shown, after flipping, it contacts with two groups of supporting poles 72 to form support, and because the two groups of supporting poles 72 are also based on the reference plate 71, the supporting position is more accurate, avoiding the influence of the supporting structure on the positioning accuracy.

[0065] It should also be noted that, since the mold is heavy, 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: Fig.12 As shown, it includes a buffer base 751 connected to the inner side of the supporting upright 72, the buffer base 751 has an arc groove on the top, and a plurality of groups of mounting grooves 752 are arranged at the bottom of the arc groove, and buffer springs 753 are installed in the mounting grooves 752, and a buffer plate 754 is connected to the top of the plurality of buffer springs 753, 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 supporting upright 72 in the initial state, so that the receiving shaft 76 in the upper flip arm assembly 5 which is about to stop flipping will contact the buffer plate 754 first to play the role of buffering and absorbing energy, while buffering and avoiding the rigid impact on the support groove 721.

[0066] Embodiment 3 This embodiment provides a method for turning over a fan blade mold turning machine based on the second embodiment, comprising the following steps: Step 1, calibration: After the installation is completed, the servo motor is started through the controller to drive the mounting base 742 to swing back and forth, and the infrared receiver 744 is positioned on the reference plate 71. When the infrared receiver 744 receives the infrared rays emitted by the infrared transmitter 743, the controller controls the servo motor to rotate ninety degrees counterclockwise, and the positioning shaft 741 drives the rotating substrate 745 to rotate until it is parallel to the reference plate 71.

[0067] 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 rod 72 to complete the flipping.

[0068] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. 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 a limitation on 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.

[0069] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0070] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation 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), wherein the lower flip arm assembly (2) is mounted on the top of the module base (1); 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 is absorbed by the buffer assembly (75).

2. A fan blade mold turning machine according to claim 1, characterized in that: 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 supporting 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 crossbar is also provided between the two groups 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) comprises two side panels, a limit strip is provided between the two side panels, and the tops of the two side panels are connected to the flip shaft assembly (4); The two sets of lower flip side plates (21) are connected to the upper flip arm assembly (5) via a 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 through 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), and the fourth connecting shaft (53) is connected to the second flip hydraulic cylinder (29); 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) comprises a main shaft body (41), the main shaft body (41) is arranged to penetrate 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 a side surface of 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). 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).

6. A fan blade mold turning machine according to claim 4, characterized in that: 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) and the module base (1) have the same installation reference; Support plates (73) are symmetrically arranged on the reference plate (71), and the positioning assembly (74) is arranged between the two support plates (73).

7. A fan blade mold turning machine according to claim 6, characterized in that: The positioning assembly (74) comprises 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 a servo motor; the positioning shaft (741) passes through the inner hole of the support shaft (210); a flip 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 flip groove (211); The second infrared photoelectric switch comprises a second infrared receiver (747) located on the rotating substrate (745) and a second infrared transmitter (746) arranged on the baffle (55) of the upper flip arm assembly (5).

8. A fan blade mold turning machine according to claim 7, characterized in that: The flip positioning system (7) further comprises a mounting seat (742) and an infrared photoelectric switch, wherein the infrared photoelectric switch comprises 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).

9. A fan blade mold turning machine according to claim 8, characterized in that: The reference plate (71) is also provided with supporting uprights (72), and at least two groups of the supporting 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 upright pole (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 upright pole (72).

10. A method for turning over a fan blade mold turning machine according to claim 9, 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, and the infrared receiver 1 (744) is aligned with the reference plate (71). When the infrared receiver 1 (744) receives the infrared light emitted by the infrared transmitter 1 (743), the servo motor rotates 90 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 second infrared receiver (747) receives the infrared rays 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, and the receiving shaft (76) is received on the supporting rod (72), and the flipping is completed.

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