Blade end face trimming machine and method of use thereof

Abstract

The present invention discloses a blade end face trimmer and a method for using the same. The blade end face trimmer comprises: a rotary frame, a rotary support, which is mounted on the rotary frame in the middle of the trimmer, the outer ring of the rotary support is mounted on the rotary frame, and the inner disk is placed in the outer ring to realize rotation; a support mechanism, wherein the support mechanism is divided into an auxiliary support and a main support, and the support mechanism installs the trimmer on the inner wall of the end face of the wind blade; a rotating arm, wherein both ends of the rotating arm are equipped with grinding components and distance measuring devices for grinding and measuring the end face; a positioning arm, which is used to install and position the trimmer and adjust the position of the trimmer; a control part, which is used to control, instruct, and collect the operating actions or data information of the above-mentioned rotary support, support mechanism, rotating arm, and positioning arm; the structure of the present invention is simple to operate, has low maintenance cost, is easy to install, has reliable connection, and has a long service life, and is equipped with a transfer vehicle to solve the problem of mobility.

Description

Technical Field

[0001] The invention belongs to the technical field of blade trimming machines, and in particular relates to a blade end surface trimming machine and a use method thereof. Background Art

[0002] Wind energy is a renewable energy source that is receiving significant attention worldwide. Currently, wind energy is primarily converted into mechanical energy through blades and then back into electrical energy. The entire wind turbine is massive, requiring extended use after installation. This places high demands on the blades' inherent material quality and service life.

[0003] The size of the wind blades after production is huge, and trimming the wind blades is a relatively complicated process. The most important part of the trimming process is to polish the end face of the wind blade to ensure that the end face of the wind blade and the flange can be properly connected. Therefore, the end face of the wind blade needs to be precisely processed and polished to ensure that its flatness reaches the process standard within 0.5mm.

[0004] Faced with the larger end faces of wind blades, they cannot be placed on conventional processing machines for processing and trimming. Conventional manual grinding results in low work efficiency, and the flatness of the ground end faces cannot reach an accuracy of less than 0.5mm. Faced with batches of large wind blades, corresponding large-scale equipment is inevitably required to complete the above work. Summary of the Invention

[0005] The purpose of the present invention is to design a blade end face trimming machine that can grind and trim the end face of a wind blade, realize positioning and installation, and measure distance to achieve required accuracy and flatness.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] The blade end surface trimming machine is characterized by comprising: a rotary frame,

[0008] The slewing support is installed on the slewing frame in the middle of the trimmer. The outer ring of the slewing support is installed on the slewing frame, and the inner disk is placed inside the outer ring to achieve rotation;

[0009] A supporting mechanism, which is divided into an auxiliary support and a main support, and which fixes the trimmer to the inner wall of the end face of the wind blade;

[0010] A rotating arm, with grinding components and distance measuring devices installed at both ends of the rotating arm for grinding and measuring the end surface;

[0011] Positioning arm, to install and position the trimmer, cooperate with the support mechanism to fix and adjust the position of the trimmer;

[0012] The control part is used to control, instruct and collect the operating actions or data information of the above-mentioned slewing support, support mechanism, rotating arm and positioning arm.

[0013] Furthermore, the main support is installed on the revolving frame. The main support includes a motor and a reducer, which are connected to three screw supports through a coupling to synchronously support or retract.

[0014] Furthermore, the auxiliary support specifically adopts 3 electric cylinder supports, and the electric cylinder supports and push rods are evenly arranged on the revolving frame.

[0015] Furthermore, the rotating arm is installed at the center of the slewing support inner disk, and the grinding component includes a grinding head and a motor. The motor drives the grinding head to achieve horizontal or vertical movement on the rotating arm.

[0016] Furthermore, the slewing support is driven by a servo motor to realize rotation, and a slip ring is installed on the slewing support, and electrical and signal transmission is realized through the connection of front and rear slip rings.

[0017] Furthermore, the finishing machine is also provided with a mobile vehicle.

[0018] Compared with the existing technology, the above technical solution can achieve the following beneficial effects:

[0019] The present invention forms a trimming machine through a rotary support, a supporting mechanism, a rotating arm, a positioning arm and a control part, which can grind and trim the end surface of a wind blade.

[0020] The center of the slewing support uses a slip ring to transmit electrical and pneumatic signals, preventing entanglement of transmission lines, electrical and pneumatic pipes during equipment rotation. The slewing support uses a zero-clearance slewing body, which provides high precision, large load capacity, good rigidity, and extended service life. It also avoids post-processing errors caused by slewing body clearance.

[0021] The positioning arm adopts the principle of electromagnetic adsorption, which combines the end bolt sleeve and the electromagnet into one, solving the problem of gap in equipment positioning.

[0022] The support mechanism is divided into auxiliary support and main support. The auxiliary support is supported by three independent electric cylinders or pneumatic cylinders for auxiliary use. The main support adopts a joint screw support. Compared with the existing electric cylinder or pneumatic cylinder support, the mechanical support is more reliable and stable.

[0023] The grinding part and distance measuring device on the rotating arm can realize online detection feedback of grinding and measurement, shortening the blade detection time.

[0024] The structure of the present invention is simple to operate, has low maintenance cost, is easy to install, has reliable connection, and has a long service life. It is also equipped with a transfer vehicle to solve the problem of mobility. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is the main view of the end face trimmer.

[0026] Figure 2 This is the rear view of the end face trimmer.

[0027] Figure 3 This is the relationship diagram of the internal front and rear slip rings.

[0028] Figure 4 This is a top view of the end face trimmer.

[0029] Figure 5 This is a structural diagram of the distance measuring device.

[0030] Figure 6 This is the structural diagram of the positioning arm.

[0031] Figure 7 This is a structural diagram of the polished parts.

[0032] Figure 8 It is a state diagram.

[0033] In the picture:

[0034] In the figure: 1. Rotating frame; 2. Rotating fixed plate; 3. Grinding part; 4. Distance measuring device; 5. Control part; 6. Positioning arm; 7. Rotating arm; 8. Main support; 9. Auxiliary support; 10. Servo motor; 11. Front slip ring; 12. Rear slip ring; 13. Motor; 14. Reducer; 15. Coupling; 16. Screw elevator; 17. Support leg; 18. Push rod; 31. Grinding head; 32. Longitudinal plate; 33. Transverse plate. DETAILED DESCRIPTION

[0035] The present invention will be further described below with reference to the accompanying drawings:

[0036] like Figure 1-4 As shown, the blade end surface trimming machine includes: a rotating frame 1, wherein a rotating support is installed on the rotating frame in the middle of the trimming machine, the outer ring of the rotating support is installed on the rotating frame, and the inner disk is placed in the outer ring to realize rotation; wherein, a servo motor 10 is provided on the inner disk, and the servo motor 10 drives a driving wheel, and the driving wheel engages with the outer ring, so that the inner disk rotates in the outer ring. Since the inner disk and the rotating frame 1 are in a relative rotation state, there is a problem of entanglement of wires and signal lines during use, so the present application installs a front slip ring 11 and a rear slip ring 12 in front and behind the inner disk respectively, so as to realize the transmission of electricity and signals.

[0037] A supporting mechanism is provided on the back of the rotating frame 1. The supporting mechanism is divided into an auxiliary support 9 and a main support 8. The supporting mechanism installs the trimmer on the inner wall of the end face of the wind blade; the main support 8 outputs power through the motor 13 and the reducer 14, and drives three screw elevators 16 at the same time under the series coupling 15. The operation of the screw elevator 16 changes the extension and retraction of the support legs 17. When the support legs are extended at the same time, they support and fix the inner wall of the blade end face; the auxiliary support 9 is specifically composed of an electric cylinder and a push rod 18. There are three groups of auxiliary supports 9, which are alternately arranged on the six sides of the rotating frame 1 with the three support legs.

[0038] A rotating arm 7 is installed on the inner disk surface of the slewing support, and a grinding component 3 and a distance measuring device 4 are installed at both ends of the rotating arm 7. The grinding head of the grinding component 3 adopts a servo motor. The high-power servo motor can ensure the processing accuracy of the end face of the wind blade. Secondly, the servo motor and the grinding head are located on the movable plate and can realize horizontal or vertical movement. These states can be achieved through horizontal or vertical slider rails.

[0039] Figure 4 and 7 As shown, the grinding component 3 includes a servo motor and a grinding head 31. A base is provided below the servo motor and grinding head 31. A longitudinal slider is provided below the base. The longitudinal slider moves on a longitudinal slide rail on a longitudinal plate 32. A transverse slider is provided below the longitudinal plate 32. A transverse slide rail is provided on a transverse plate 33. The longitudinal plate 32 moves laterally on the transverse slide rail of the transverse plate 33 via the transverse slider. The transverse plate 33 is ultimately fixed to both ends of the rotating arm 7. The transverse and longitudinal movements are achieved by adjusting screws.

[0040] Figure 5 As shown, the distance measuring device 4 includes a distance measuring movable plate, a grating ruler is installed on the side of the distance measuring movable plate, a distance measuring rod is provided at the front end of the distance measuring movable plate, a distance measuring plate is provided at the rear end of the distance measuring movable plate, and a telescopic rod at the front end of the cylinder is connected to the distance measuring plate. The distance measuring movable plate moves laterally on the bottom plate, and the bottom plate realizes longitudinal movement. The distance measuring rod is a rigid distance measuring rod. Compared with the existing laser distance measurement, it is more suitable for dust particle environment and has high measurement accuracy. After contacting the surface of the bolt sleeve, the data is recorded, the high and low points are counted, and the peak-to-peak value is calculated.

[0041] Three sets of positioning arms are evenly arranged on the inner disk surface of the slewing support. The end of the positioning arm 6 is equipped with an electromagnet and a cylinder ( Figure 6 As shown), during positioning, the electromagnet and the blade end face bolt are combined into one to solve the problem of positioning gap and at the same time be used to detect the end face value; a rotating fixed plate 2 is installed near one set of positioning arms 6, and during hoisting, the entire trimmer is lifted by the rotating fixed plate 2.

[0042] The control part 5 is used to control, instruct, and collect the operating actions or data information of the above-mentioned slewing support, support mechanism, rotating arm, and positioning arm.

[0043] Operation process:

[0044] Check the equipment's air supply pressure. It must not be less than 0.6 MPa. Otherwise, the electromagnet cylinder will experience excessive compression during attraction, causing incorrect tensioning and significant measurement errors. Rotate the mounting plate 2's lifting point to attach a sling, and use the sling to hoist the equipment to the center of the blade product's end face. Extend the positioning arm from the electromagnet cylinder, energize the electromagnet coil, and place it against the product's end face, causing the three electromagnets to attach. Extend the three torque tensioning shafts (screw supports) from the main support of the support mechanism. Once tightened, the tensioning shafts automatically stop (tension motor torque feedback is greater than 65%). If any electromagnet fails to attach to the product's end face, the hoisting position and product center point are significantly offset. Adjust the hoisting center point and re-tighten the torque tensioning shafts. Once the torque tensioning shafts are tightened, extend the three tensioning cylinders (auxiliary supports) to ensure they remain firmly against the product's inner wall. Remove the slings.

[0045] Check the detection end face of the grating cylinder for any attachments. If necessary, manually clean them off, as this will affect the accuracy of the high-point measurement. Check the air pressure of the grating cylinder and maintain it at 0.14-0.15 MPa. Start the high-point detection program. After the detection is completed, rotate the grinding head to the high-point position according to the reference point on the measurement interface. Observe the grinding head feed position and control the grinding head to work. When the grinding head approaches the end face of the product, perform the precise tool setting step. When sparks are generated between the grinding head and the end face of the product, the tool setting is complete.

[0046] The control part is in automatic grinding state. When the feed displacement is greater than or equal to the total feed stroke, the core mold will continue to grind one roll in the air without feeding the knife. After the air grinding of one roll is completed, the grinding will end.

[0047] After completion, hang the sling on the equipment lifting point, retract the auxiliary support, and then retract the three torque tensioning shafts.

[0048] In the above embodiment, after the trimmer is accurately positioned and installed, the control part controls the servo drive to rotate the slewing support, and the positioning arm and the rotating arm rotate on the slewing support at the same time. The center of the slewing support adopts a slip ring method to realize the transmission of electrical, gas and other signals to prevent the transmission line, electrical and air pipes from being entangled during the rotation of the equipment. The slewing support adopts a zero-gap slewing body with high precision, large load capacity, good rigidity, and service life. It also avoids the gap between the slewing bodies causing errors in later processing. While rotating, the grinding parts and the distance measuring device are both working. The grinding parts and the distance measuring device at both ends of the slewing arm can improve the efficiency of grinding. Compared with the grinding parts at one end, the efficiency is doubled. The grinding head adopts a high-power motor to drive the grinding wheel combination to ensure the surface processing accuracy.

[0049] Figure 3 As shown, in the non-working state, it is placed on the transfer vehicle through the lifting equipment, and the equipment can be moved to the next processing place by moving the driving wheels below.

[0050] In the above embodiment, the revolving frame 1 is welded with high-strength rectangular tubes and annealed to ensure the shape and position tolerance of the equipment, so that the equipment has a small error.

[0051] In the above embodiment, the relationship between the slide rail and the slider can adjust the position of the electromagnet, and the adjustment is achieved according to the diameter of the blade.

[0052] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Blade end surface trimming machine, characterized by: Includes: slewing frame, The slewing support is installed on the slewing frame in the middle of the trimmer. The outer ring of the slewing support is installed on the slewing frame, and the inner disk is placed inside the outer ring to achieve rotation; A supporting mechanism, which is divided into an auxiliary support and a main support, and which fixes the trimmer to the inner wall of the end face of the wind blade; A rotating arm, with grinding components and distance measuring devices installed at both ends of the rotating arm for grinding and measuring the end surface; Positioning arm, to install and position the trimmer, cooperate with the support mechanism to fix and adjust the position of the trimmer; The control part is used to control, instruct, and collect the operating actions or data information of the above-mentioned slewing support, support mechanism, rotating arm, and positioning arm; The blade end face trimming machine is used as follows: Step 1: Preparation for trimming: Connect the lifting straps of the lifting equipment to the rotating fixed plate and lift the trimmer from the mobile vehicle to the center of the blade end face; Step 2: Fixing the trimmer: The control part instructs the end of the positioning arm to extend the electromagnet cylinder, energizes the electromagnet coil, and each electromagnet is adsorbed on the end of the product; after receiving the signal that the electromagnet is adsorbed on the end surface, the control part instructs the main support to synchronously extend the screw support body. When the screw support body is tightened, the feedback signal is sent to the control part to stop; if an electromagnet is not adsorbed on the end surface of the product, it means that the error between the lifting position and the center point of the product is too large. After adjusting the lifting center point, the main support is re-instructed to synchronously extend the screw support body, and then the auxiliary support is extended. At this time, the trimmer is fixed at the center of the blade end surface; Step 3: Blade end face detection: The grating ruler detects the highest point, lowest point and height difference data on the blade end face and transmits it to the control part. After data analysis and processing, the grinding information is given; Step 4: Blade end face grinding: The control part drives the grinding components to operate. The grinding components are divided into a main grinding head and an auxiliary grinding head. The speed, grinding stroke and step feed amount are set automatically or manually. Step 5: Grinding and measuring are carried out simultaneously, and both grinding and measuring data are fed back to the control part. When the measuring data is calculated and it is determined that the flatness of the blade end face is within 0.5mm, grinding can be stopped and finishing can be completed.

2. The blade end surface trimming machine according to claim 1, characterized in that: The main support is installed on the revolving frame. The main support includes a motor and a reducer, which are connected to three screw supports through a coupling to support or retract synchronously.

3. The blade end surface trimming machine according to claim 1 or 2, characterized in that: The auxiliary support specifically adopts 3 electric cylinder supports, and the electric cylinder supports and push rods are evenly arranged on the rotary frame.

4. The blade end surface trimming machine according to claim 1, characterized in that: The rotating arm is installed at the center of the slewing support inner disk. The grinding component includes a grinding head and a motor. The motor drives the grinding head to achieve horizontal or vertical movement on the rotating arm.

5. The blade end surface trimming machine according to claim 1, characterized in that: The slewing support is driven by a servo motor to achieve rotation. Slip rings are installed on the slewing support, and electrical and signal transmission is achieved through the connection of front and rear slip rings.

6. The blade end surface trimming machine according to claim 1, characterized in that: The finishing machine is also provided with a mobile vehicle.

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