Fan blade cutting method

Abstract

The application discloses a fan blade cutting method. The device comprises a conveying belt for conveying the fan blade, a hydraulic rod capable of moving up and down is arranged above the conveying belt, a cutting tool bit for cutting the fan blade is arranged at the bottom output end of the hydraulic rod; a dust cover is arranged above the hydraulic rod, transparent protective covers are respectively arranged on both sides of the conveying belt along the running direction; dustproof baffles are respectively arranged above the inlet end and the outlet end of the conveying belt; a dust extractor is communicated with the top end of the dust cover, a dust conveying pipe is communicated with the outlet of the dust extractor, and a powder storage device is communicated with the outlet end of the dust conveying pipe. The application not only realizes the accurate separation of the surface and the inner layer of the blade, achieves the purpose of low-damage controllable cutting of the inner layer fiber of the blade, but also collects the cutting dust, avoids the scattering of the dust into the environment and causes harm.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fan blade cutting, in particular to a fan blade cutting device and cutting method. BACKGROUND

[0002] Fan blades are one of the components of a fan, which are blade-shaped structures installed on the fan rotor. The main function of fan blades is to convert the kinetic energy of fluid (usually air) into mechanical energy, thereby generating airflow or fluid flow. When the fan rotor rotates, the air flow passes through the fan blades, and the shape and angle of the blades cause the fluid to accelerate and change direction, thereby generating airflow or fluid flow.

[0003] With the rapid development of the wind power industry, the recycling of retired fan blades and the reasonable disposal of waste parts have become an urgent environmental problem. Considering the trend of large-scale and lightweight development of fan blades, the manufacturing materials of the blades have developed from the initial linen covered with wood to steel, aluminum alloy, and finally to fiber-reinforced composite materials. The resin matrix of the surface layer of the fiber-reinforced composite material is generally a thermosetting resin, and the three-dimensional network cross-linking structure brings about solubility stability, which makes it impossible to degrade naturally. Therefore, the extraction and recovery of fibers inside the resin matrix can only be used for

[0004] Fan blade cutting and disassembly.

[0005] Since the resin matrix of the surface layer is a hard and brittle material, while the internal fibers are relatively flexible, the mechanical properties of the composite material have a large difference, and its precise cutting has always been a problem. In the prior art, the fan blade is mostly cut by a rotating saw disc, or manually cut by a rope saw. However, both the rotating saw disc and the rope saw use conventional cutters, which do not take into account the mechanical property differences of fibers and resins, and treat them as uniform materials for cutting. Not only is it difficult to control the cutting accuracy, but also during the cutting process, the material damage area near the cutting edge is large, the dust is high, and the environmental pollution is serious. At the same time, the cutting energy consumption is high, the cutting tool is severely damaged, the cutting tool is easy to break, the service life is low, and the cutting cost and carbon emissions are high. SUMMARY

[0006] In view of the shortcomings of the prior art, the present application provides a fan blade cutting device and cutting method, which solves the problems of inaccurate cutting precision, damaged fiber length, and large amount of dust generated during the cutting process to harm the surrounding environment.

[0007] In order to achieve the above-mentioned purpose, the fan blade cutting device designed by the application has the particularity that: a conveying belt for conveying fan blades is arranged, a hydraulic rod capable of moving up and down is arranged above the conveying belt, a cutting tool bit for cutting the fan blades is arranged at the bottom output end of the hydraulic rod, the hydraulic rod is used to drive the cutting tool bit to move downward to break the hard and brittle resin on the surface layer of the fan blade, and the fan blade is longitudinally cut to expose the fiber, then the conveying belt carries the fan blade to run towards the outlet end of the conveying belt, so as to realize the transverse cutting of the fan blade by the cutting tool bit at the cutting edge.

[0008] A dust cover is arranged above the hydraulic rod, and the dust cover can cover the conveying belt area, transparent guards are arranged on both sides of the conveying belt along the running direction, and the upper end of the transparent guard extends to the dust cover; dustproof baffles are arranged above the inlet end and the outlet end of the conveying belt, and the upper end of the dustproof baffle extends to the dust cover; the dust cover, the transparent guard, the dustproof baffle, and the conveying belt together form a shielding space for cutting dust.

[0009] A dust extractor for absorbing cutting dust is communicated with the top end of the dust cover, the outlet of the dust extractor is communicated with a dust conveying pipe, and the outlet end of the dust conveying pipe extends to a position away from the conveying belt, and the outlet of the dust conveying pipe is communicated with a powder storage device.

[0010] Further, a sensor is arranged at the top end of the inner wall of the dust cover and close to the position of the dust cover at the outlet end, and the sensor is used to detect whether the conveying position of the fan blade is located directly below the cutting tool bit.

[0011] Further, a monitoring device is arranged at the top end of the inner wall of the dust cover and between the sensor and the dust cover at the outlet end, and the monitoring device is used to monitor the cutting process of the fan blade.

[0012] Further, support rods are connected between the dust cover and the conveying belt for support, and the support rods are arranged at the inlet end and the outlet end of the conveying belt and are located outside the dustproof baffles, respectively.

[0013] Further, the top fixed end of the hydraulic rod is fixedly connected with the corresponding position of the top end of the inner wall of the dust cover.

[0014] Further, the hydraulic rod is a plurality of, and the adjacent hydraulic rods are fixedly arranged at the corresponding positions of the top end of the inner wall of the dust cover, and different types of cutting tool bits are arranged at the bottom output ends of the plurality of hydraulic rods.

[0015] Further, the cutting device further comprises an operation table, the operation table is used to accurately control the conveying power and rate of the conveying belt, so as to accurately control the cutting position and length of the fan blade; and the operation table is used to accurately control the moving rate of the hydraulic rod, so as to accurately control the cutting depth of the fan blade.

[0016] The application also designs a fan blade cutting method suitable for the fan blade cutting device, which is characterized in that the method comprises the following steps:

[0017] S1) inputting relevant parameters on the operation table, wherein the parameters include the original size of the fan blade, the conveying power and the conveying speed of the conveying belt, the descending speed of the hydraulic rod, the cutting position of the cutting tool, the cutting length and the cutting depth;

[0018] S2) placing the fan blade to be cut on the inlet end of the conveying belt, and conveying the fan blade carried by the conveying belt towards the outlet end;

[0019] S3) when the sensor detects that the fan blade is conveyed to the position directly below the cutting tool, stopping the conveying of the conveying belt, controlling the operation table to drive the hydraulic rod to move the cutting tool downwards to the set cutting depth position, then controlling the operation table to drive the conveying belt to continue conveying the fan blade, in the conveying process, cutting and decomposing the fan blade according to the preset cutting length, and stopping the conveying of the conveying belt again after the cutting is completed;

[0020] S4) the shielding space surrounded by the dust cover, the transparent cover, the dust baffle and the conveying belt controls the cutting dust, the dust extractor is started to absorb the cutting dust, and the cutting dust is air conveyed to the powder storage device through the dust conveying pipe, the powder storage device discharges the excess air and stores the cutting dust;

[0021] S5) repeating steps S1) to S4) to cut and separate the next part of the fan blade.

[0022] Further, in S1), the conveying power of the conveying belt is 0.5-1.5 kW, and the conveying speed of the conveying belt is 5-100 cm / min.

[0023] Further, in S1), the descending speed of the hydraulic rod is 1-6 cm / min.

[0024] The application has the following advantages:

[0025] 1. The application is aimed at the difference between the outer resin matrix and the inner layer fiber, adopts the combination of longitudinal cutting and transverse cutting, and separates each part of the fan blade; first, the cutting tool bit is arranged at the bottom output end of the hydraulic rod, the longitudinal cutting depth of the cutting tool bit to the fan blade is accurately controlled by controlling the descending speed and distance of the hydraulic rod; then, when the cutting tool bit is longitudinally cut to the fiber position inside the composite material, the conveyor belt is started, and the transverse cutting length of the cutting tool bit to the fan blade is accurately controlled by controlling the conveying rate and conveying distance of the conveyor belt, so that the accurate separation of the blade surface and the inner layer is realized, and the purpose of low-damage controllable cutting of the blade inner layer fiber is achieved; the cutting process is targeted for the different characteristics of resin and fiber, and has the advantages of high cutting efficiency, low energy consumption and less dust;

[0026] 2. The accurate regulation of the hydraulic rod and the conveyor belt by the operation table can control the longitudinal cutting depth and the transverse cutting length of the fan blade with centimeter-level precision, so that the accurate separation of each part of the fan blade is realized;

[0027] 3. The cutting dust is controlled by the shielding space surrounded by the dust cover, the transparent cover, the dust baffle and the conveyor belt, so that the dust leakage is avoided, and the cutting dust is collected by the dust extractor, the dust conveying pipe and the powder storage device, so that the harm caused by the dust emission to the environment is avoided;

[0028] The fan blade cutting device and the cutting method can not only realize the accurate separation of the blade surface and the inner layer, achieve the purpose of low-damage controllable cutting of the blade inner layer fiber, but also collect the cutting dust, avoid the harm caused by the dust emission to the environment. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is the overall structure schematic diagram of the fan blade cutting device in the application;

[0030] Figure 2 It is the front view structure schematic diagram of the cutting tool bit in the application; Figure 1

[0031] Figure 3 It is the cross-sectional view structure schematic diagram of the cutting tool bit in the application; Figure 2

[0032] Figure 4 It is the flow chart of the fan blade cutting method in the application;

[0033] In the figure: conveyor belt 1, hydraulic rod 2, cutting tool bit 3, dust cover 4, transparent cover 5, dust baffle 6, dust extractor 7, dust conveying pipe 8, powder storage device 9, operation table 10, sensor 11, monitoring equipment 12;

[0034] The dust cover 4 comprises a supporting rod 4-1.​​ DETAILED DESCRIPTION

[0035] The application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0036] In the description of the application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application.

[0037] As shown in Figures 1-3 The fan blade cutting device of the application comprises a conveying belt 1 for conveying fan blades, a hydraulic rod 2 capable of moving up and down is arranged directly above the conveying belt 1, a cutting tool bit 3 for cutting fan blades is arranged at the bottom output end of the hydraulic rod 2, the hydraulic rod 2 is used to drive the cutting tool bit 3 to move downward to break the hard and brittle resin on the surface layer of the fan blade, and the cutting tool bit 3 is used to cut longitudinally to expose the fibers, and the conveying belt 1 is used to carry the fan blades to run towards the outlet end of the conveying belt 1, so as to realize the transverse cutting of the cutting tool bit 3 at the cutting edge of the fan blade.

[0038] Specifically, the monolithic fan blade has a length of 30-60 meters and a weight of 8-20 tons.

[0039] The application adopts the combination of longitudinal cutting and transverse cutting to separate the fan blades in different parts according to the difference between the outer resin matrix and the inner layer of fibers. First, the cutting tool bit 3 is arranged at the bottom output end of the hydraulic rod 2, and the downward speed and distance of the hydraulic rod 2 are controlled to accurately control the longitudinal cutting depth of the cutting tool bit 3 on the fan blade. Then, when the cutting tool bit 3 is longitudinally cut to the fiber position inside the composite material, the conveying belt 1 is started, and the conveying speed and distance of the conveying belt 1 are controlled to accurately control the transverse cutting length of the cutting tool bit 3 on the fan blade. Finally, the surface of the blade and the inner layer are accurately separated, and the purpose of low-damage and controllable cutting of the inner layer of the blade is achieved.

[0040] As shown in Figures 2-3 According to the difference between the composite material fibers and the resin, the blade type and the tool groove of the cutting tool are specially designed. When the tool is fed, the hard and brittle resin is first subjected to a large compressive stress to be broken down efficiently, and the fibers are oriented under the guidance of the tool groove after being exposed, and are transversely cut at the cutting edge. The above cutting process is targeted for the different characteristics of the resin and the fibers, and has the advantages of high cutting efficiency, low energy consumption and less dust.

[0041] Preferably, the cutting device further comprises an operation table 10 for accurately regulating the transmission power and speed of the conveying belt 1, so as to accurately control the transverse cutting position and cutting length of the fan blade; the operation table 10 is used for accurately regulating the moving speed of the hydraulic rod 2, so as to accurately control the longitudinal cutting depth of the fan blade.

[0042] The present application can control the longitudinal cutting depth and transverse cutting length of the fan blade with centimeter-level precision by accurately regulating the hydraulic rod 2 and the conveying belt 1 through the operation table 10, so as to accurately separate each part of the fan blade.

[0043] The dust cover 4 is arranged above the hydraulic rod 2 and can cover the area of the conveying belt 1, the transparent cover 5 is arranged on both sides of the conveying belt 1 along the running direction, and the upper end of the transparent cover 5 extends to the dust cover 4; the dust cover 4, the transparent cover 5, the dust cover 6 and the conveying belt 1 form a shielding space for cutting dust.

[0044] Preferably, the top fixed end of the hydraulic rod 2 is fixedly connected to the corresponding position of the inner wall top end of the dust cover 4.

[0045] Preferably, the transparent cover 5 is a glass cover.

[0046] The hydraulic rod 2 is a plurality of, and the adjacent hydraulic rods 2 are fixedly arranged at the corresponding positions of the inner wall top end of the dust cover 4, and the bottom output end of the plurality of hydraulic rods 2 is provided with a cutting tool bit 3 with different blade types. In this embodiment, the number of hydraulic rods 2 is three.

[0047] Preferably, the dust cover 4 and the conveying belt 1 are connected with a support rod 4-1 for supporting, the number of the support rod 4-1 is two, and the support rod 4-1 is arranged at the inlet end and the outlet end of the conveying belt 1 and located outside the dust cover 6.

[0048] Preferably, the dust cover 4 is provided with a sensor 11 at the inner wall top end and close to the position of the outlet end dust cover 4, and the sensor 11 is used to detect whether the conveying position of the fan blade is located directly below the cutting tool bit 3.

[0049] Preferably, the dust cover 4 is provided with a monitoring device 12 at the inner wall top end and between the sensor 11 and the outlet end dust cover 4, and the monitoring device 12 is used to monitor the cutting process of the fan blade.

[0050] The dust cover 4 top end is communicated with a dust extractor 7 for absorbing cutting dust, the dust extractor 7 outlet is communicated with a dust conveying pipe 8, and the dust conveying pipe 8 outlet end extends to a position away from the conveying belt 1, and the dust conveying pipe 8 outlet is communicated with a powder reservoir 9.

[0051] The dust extractor 7 can suck the cutting dust air, and the dust air is transported into the powder reservoir 9 through the dust conveying pipe 8, and the powder reservoir 9 can collect the dust and discharge the excess air.

[0052] The dust cover, the transparent cover, the dust baffle and the conveying belt jointly form a shielding space to control the cutting dust, avoid dust leakage, and collect the cutting dust through the dust extractor, the dust conveying pipe and the powder reservoir, so that the cutting dust is prevented from being scattered into the environment to cause harm.

[0053] The application also designs a fan blade cutting method, which is suitable for the fan blade cutting device, and includes the following steps:

[0054] S1) input relevant parameters on the operation table 10, the parameters including fan blade original size, conveying power and conveying speed of the conveying belt 1, descending speed of the hydraulic rod 2, cutting position, cutting length and cutting depth of the machining cutter.

[0055] Specifically, the conveying power of the conveying belt 1 is 0.5-1.5 kW, and the conveying speed of the conveying belt 1 is 5-100 cm / min.

[0056] Specifically, the descending speed of the hydraulic rod 2 is 1-6 cm / min.

[0057] S2) place the fan blade to be cut on the conveying belt inlet end, and make the conveying belt 1 carry the fan blade to the outlet end.

[0058] S3) when the sensor 11 detects that the fan blade is conveyed to the position directly below the cutting cutter head 3, the conveying of the conveying belt 1 is paused, the operation table 10 is controlled to drive the hydraulic rod 2 to move the cutting cutter head 3 downward to the set cutting depth position, then the operation table 10 is controlled to drive the conveying belt 1 to continue conveying the fan blade, in the conveying process, the fan blade is cut and decomposed according to the preset cutting length, and the conveying of the conveying belt 1 is paused again after cutting.

[0059] S4) the shielding space formed by the dust cover 4, the transparent cover 5, the dust baffle 6 and the conveying belt 1 controls the cutting dust, the dust extractor 7 is started to absorb the cutting dust, the dust conveying pipe 8 is used to transport the cutting dust air to the powder reservoir 9, the powder reservoir 9 discharges the excess air and collects and stores the cutting dust.

[0060] S5) repeating steps S1)~S4) to cut and separate the next part of the fan blade.

[0061] The fan blade cutting device and the cutting method can realize accurate separation of the blade surface and the inner layer, achieve the purpose of low-damage and controllable cutting of the inner layer fiber of the blade, and collect the cutting dust, so as to avoid the harm caused by the dust emission to the environment.

[0062] The preferred embodiments of the application are described above, but the embodiments of the application are not limited to the above examples, and any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the application should be equivalent replacement methods, and all are included in the protection scope of the application.

Claims

1. A method of cutting a wind turbine blade, characterized in that, The utility model provides fan blade cutting device, which is applied to the cutting method of fan blade, and the fan blade cutting device comprises a conveying belt (1) for conveying fan blades, a hydraulic rod (2) capable of moving up and down is arranged above the conveying belt (1), a cutting tool bit (3) for cutting fan blades is arranged at the bottom output end of the hydraulic rod (2), the hydraulic rod (2) is used to drive the cutting tool bit (3) to move downwards to break the hard brittle resin on the surface layer of the fan blade, and the fan blade is longitudinally cut to expose the fiber, then the conveying belt (1) carries the fan blade towards the outlet end of the conveying belt (1) to realize the transverse cutting of the fan blade by the cutting tool bit (3) at the cutting edge. A dust cover (4) is arranged above the hydraulic rod (2) and covers the area of the conveying belt (1), transparent protective covers (5) are arranged on both sides of the conveying belt (1) along the running direction, and the upper ends of the transparent protective covers (5) extend to the dust cover (4), dust baffle plates (6) are arranged above the inlet end and the outlet end of the conveying belt (1), and the upper ends of the dust baffle plates (6) extend to the dust cover (4), and the dust cover (4), the transparent protective covers (5), the dust baffle plates (6) and the conveying belt (1) jointly form a shielding space for cutting dust. A dust extractor (7) for absorbing cutting dust is connected to the top end of the dust cover (4), a dust conveying pipe (8) is connected to the outlet of the dust extractor (7), the outlet end of the dust conveying pipe (8) extends to a position away from the conveying belt (1), and a powder storage device (9) is connected to the outlet of the dust conveying pipe (8). The fan blade cutting method comprises the following steps: S1) inputting relevant parameters on an operation platform (10), wherein the parameters include the original size of the fan blade, the conveying power and conveying speed of the conveying belt (1), the downward moving speed of the hydraulic rod (2), the cutting position, the cutting length and the cutting depth of the processing tool; S2) placing the fan blade to be cut on the inlet end of the conveying belt (1) to convey the fan blade towards the outlet end by the conveying belt (1); S3) when the sensor (11) detects that the fan blade is conveyed to the position directly below the cutting tool bit (3), the conveying of the conveying belt (1) is paused, the operation platform (10) drives the hydraulic rod (2) to drive the cutting tool bit (3) to move downwards to the set cutting depth position, then the operation platform (10) drives the conveying belt (1) to continue conveying the fan blade, in the conveying process, the fan blade is cut and separated according to the preset cutting length, and the conveying of the conveying belt (1) is paused again after the cutting is completed; S4) the shielding space formed by the dust cover (4), the transparent protective covers (5), the dust baffle plates (6) and the conveying belt (1) controls the cutting dust, the dust extractor (7) is started to absorb the cutting dust, the cutting dust is conveyed to the powder storage device (9) through the dust conveying pipe (8), the powder storage device (9) discharges the excess air and stores the cutting dust; S5) repeating steps S1) to S4) to cut and separate the next part of the fan blade.

2. The wind turbine blade cutting method of claim 1, wherein: In S1), the conveying power of the conveying belt (1) is 0.5-1.5 kW, and the conveying speed of the conveying belt (1) is 5-100 cm / min.

3. The wind turbine blade cutting method of claim 1, wherein: In S1), the descending speed of the hydraulic rod (2) is 1-6 cm / min.

4. The wind turbine blade cutting method of claim 1, wherein: A sensor (11) is arranged at the top end of the inner wall of the dust cover (4) and close to the position of the dust cover (4) at the outlet end, and the sensor (11) is used for detecting whether the conveying position of the fan blade is located directly below the cutting tool head (3).

5. The wind turbine blade cutting method of claim 4, wherein: A monitoring device (12) is arranged at the top end of the inner wall of the dust cover (4) and between the sensor (11) and the dust cover (4) at the outlet end, and the monitoring device (12) is used for monitoring the cutting process of the fan blade.

6. The wind turbine blade cutting method of claim 1, wherein: A supporting rod (4-1) is connected between the dust cover (4) and the conveying belt (1) for supporting, and the supporting rod (4-1) is arranged at the inlet end and the outlet end of the conveying belt (1) and located outside the dust baffle (6), respectively.

7. The wind turbine blade cutting method of claim 1, wherein: The top fixed end of the hydraulic rod (2) is fixedly connected with the corresponding position of the top end of the inner wall of the dust cover (4).

8. The wind turbine blade cutting method of claim 7, wherein: The hydraulic rod (2) is a plurality of, and the adjacent hydraulic rods (2) are fixedly arranged at the corresponding positions of the top end of the inner wall of the dust cover (4), and the bottom output ends of the plurality of hydraulic rods (2) are provided with cutting tool heads (3) of different blade types.

9. The wind turbine blade cutting method of claim 1, wherein: The operation table (10) is used for accurately controlling the conveying power and speed of the conveying belt (1), so as to accurately control the cutting position and length of the fan blade; and the operation table (10) is used for accurately controlling the moving speed of the hydraulic rod (2), so as to accurately control the cutting depth of the fan blade.

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