Automatic code spraying device for wind power blade cutting piece

Abstract

The invention relates to the technical field of glass fabric forming, in particular to a wind power blade cutting piece automatic code spraying device which comprises an unwinding unit and a cutting unit. The unwinding unit comprises an unwinding mechanism, a code spraying mechanism and a constant tension control mechanism; one end of the code spraying mechanism is arranged on the base, the other end of the code spraying mechanism is arranged in the containing space, so that a code spraying head is obliquely arranged downwards and is parallel to the glass fabric, the unwinding mechanism is driven by a servo motor controlled by a computer, the traction speed is controlled according to the cutting unit and the constant tension control mechanism, and the cloth unwinding speed and the traction speed are controlled to be synchronous. The cloth releasing tension of the glass fabric is constant; the code spraying mechanism is arranged in the unwinding unit and is placed in front of the constant tension control mechanism, so that the code spraying mechanism and the unwinding mechanism are combined into a whole, the path for pulling the fabric is shortened, the situation that the code spraying mechanism causes extra resistance to a pulling system is effectively avoided, and therefore the stability of traction force of the cutting machine is ensured; and the reliability and the stability of the system are improved.

Description

Technical Field

[0001] The invention relates to the technical field of glass fiber cloth molding, and in particular to an automatic coding device for cutting wind turbine blades. Background Art

[0002] The preformed wind turbine blade is composed of many preformed blocks, and the preformed blocks are made of different pieces, which are laid out layer by layer in a certain order, at a certain interval, and with designated coordinates. In actual production, a wind turbine blade is composed of about 900 pieces of different shapes and sizes. At present, wind turbine blade pieces at home and abroad are automatically cut and manually coded / sprayed. Since the automatic cutting machine has a high cutting speed and can cut 4 layers of glass fiber fabric at a time, a cutting machine is equipped with at least 2 multi-coders. Since there are more than 900 codes, errors are inevitable. Once an error occurs, it will seriously affect the subsequent production process. Therefore, online automatic coding technology is imperative.

[0003] In the prior art, in order to solve the above problems, a Chinese utility model patent with authorization announcement number CN211031738U disclosed a high-efficiency glass fiber cloth inkjet marking device on July 17, 2020, such as Figure 1 As shown, it includes an unwinding unit 1, a cutting unit 2, and a coding unit 3 arranged between the unwinding unit 1 and the cutting unit 2, so as to realize automatic inkjet marking of the glass fiber cloth.

[0004] However, in the above scheme, since the coding unit 3 is placed between the unwinding unit 1 and the cutting unit 2, the coding unit 3 is an independent device. As a post-process of the unwinding unit 1, each layer of cloth needs to pass through the upper and lower two passive first guide rollers and second guide rollers of the coding unit 3, which additionally increases the resistance of the cutter of the cutting unit 2. For example: suppose the additional resistance of the coding unit 3 is 2Kg; suppose the pulling force of each unwinding device of the unwinding unit 1 is 2Kg, the total pulling force of the four unwinding devices is 8Kg, and the traction force of the cutter of the new cutting unit 2 is 11Kg, then, the traction force 11Kg> pulling force 8Kg+extra resistance 2Kg, so there is no problem in using the new cutter. However, in the actual production process, the cutting machine of the cutting unit 2 uses the pulling force generated by vacuum adsorption. After a period of use, the holes in the vacuum adsorption belt will be blocked by fiber powder, and the vacuum adsorption traction force will decrease. It is assumed that the traction force continues to decrease from 11Kg to 9.5Kg. In this way, after a period of production, the traction force of the cutting machine of the cutting unit will not be able to pull the cloth of the constant tension unwinding device, causing the equipment to stop and the cutting machine will not be able to produce normally, thereby affecting the production efficiency and the stability of subsequent processes. This problem is particularly prominent in long-term operation and urgently needs to be improved and optimized.

[0005] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0006] The present invention provides an automatic coding device for cutting wind turbine blades, thereby effectively solving the problems pointed out in the background technology.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is: An automatic coding device for cutting wind turbine blades, comprising: a plurality of unwinding units and a cutting unit arranged in sequence; The cutting unit is used to cut multiple layers of glass fiber cloth; Each of the unwinding units comprises an unwinding mechanism, a coding mechanism and a constant tension control mechanism, wherein the unwinding mechanism is used to unwind the glass fiber cloth, and the coding mechanism is used to perform coding marking on the glass fiber cloth; The unwinding mechanism includes a base, an unwinding shaft arranged on the base, and a plurality of directional wheels, wherein the plurality of directional wheels guide the glass fiber cloth to enclose a storage space, one end of the coding mechanism is arranged on the base, and the other end is arranged in the storage space, and the coding mechanism is provided with a spraying terminal, so that the spraying terminal is arranged obliquely downward and parallel to the glass fiber cloth on the end surface of the spraying terminal; The constant tension control mechanism is arranged on the base, and is used to control the constant tension of the glass fiber cloth when it is unrolled, and along the path direction of the glass fiber cloth unrolling, the coding mechanism is arranged before the constant tension control mechanism; The unwinding mechanism is driven by a servo motor controlled by a computer, and controls the traction speed according to the cutting unit and the constant tension control mechanism, so as to control the synchronism between the cloth-releasing speed and the traction speed, and make the cloth-releasing tension of the glass fiber cloth constant.

[0008] Furthermore, the unwinding mechanism also includes a first directional wheel, a second directional wheel, a third directional wheel, and a fourth directional wheel which are sequentially arranged along the unwinding direction of the fiberglass cloth; the unwinding shaft, the first directional wheel, the second directional wheel and the third directional wheel are arranged to form the accommodating space, and the inkjet coding mechanism is arranged in the accommodating space; the end face of the inkjet coding terminal is parallel to the fiberglass cloth between the second directional wheel and the third directional wheel, and the fourth directional wheel guides the fiberglass cloth to the cutting machine.

[0009] Furthermore, the inclination angle of the spray dock is 46° to 50°.

[0010] Furthermore, the coding mechanism also includes a bracket and an inkjet assembly; One end of the bracket is arranged on the base, and the other end is provided with the inkjet assembly; The inkjet assembly includes a frame, a first baffle, an ink cartridge and a driving member; the frame is arranged on the bracket, the first baffle is arranged in the frame and is slidably connected to the frame, a plurality of through grooves are sequentially arranged on the first baffle, a plurality of ink cartridges are arranged on the first baffle, and the ink jet terminals of the ink cartridges pass through the through grooves, and the driving member drives the first baffle to reciprocate along the width direction of the glass fiber cloth.

[0011] Furthermore, the coding mechanism further includes a second baffle, which is arranged in parallel with the first baffle, and the first baffle and the second baffle are respectively arranged on both sides of the glass fiber cloth.

[0012] Furthermore, a gap between the first baffle and the second baffle is 3 mm to 6 mm.

[0013] Furthermore, the inkjet coding mechanism also includes an adjusting foot, a fixed shaft is provided on the back of the second baffle, the two adjusting feet are in a V-shaped structure, one end is hinged to the bracket, and the other end is connected to the fixed shaft, and a tension spring is provided between the adjusting foot and the bracket, and a limit piece is provided on the bracket, and the second baffle is driven away from or close to the first baffle by pulling the adjusting foot.

[0014] Furthermore, a baffle is provided on the side wall of the spray terminal, and the baffle is set 1mm to 2mm higher than the end surface of the spray terminal.

[0015] Further, the constant tension control mechanism includes a constant tension cylinder, a tension control balance wheel, a tension rod, an angle sensor, a first limiter and a second limiter; The two tension rods are arranged on both sides of the base and are hinged to the base. The angle sensor is arranged at the hinge to detect the angle of the tension rod; one end of the constant tension cylinder is hinged to the base, and the other end is hinged to one end of the tension rod. The tension control balance wheel is arranged at the other end of the tension rod, and the tension control balance wheel is arranged between the third directional wheel and the fourth directional wheel; the first limit member and the second limit member are arranged on the base on both sides of the tension rod, and are used to limit the maximum angle and the minimum angle of the tension rod. The angle sensor is linked to the computer-controlled servo motor of the unwinding mechanism.

[0016] Furthermore, it also includes a frame and a correction mechanism, wherein the correction mechanism includes a correction photoelectric sensor, a correction motor and a correction guide rail; The deflection correction guide rail is arranged on the frame along the width direction of the glass fiber cloth, and the base is slidably arranged on the deflection correction guide rail; the deflection correction photoelectric sensor is arranged on the frame and located on the outside of the fiber cloth, and is used to correct the position of the fiber cloth in the width direction; the deflection correction motor is used to drive the base to move on the deflection correction guide rail.

[0017] The technical solution of the present invention can achieve the following technical effects: By setting the coding mechanism in the unwinding unit and placing the coding mechanism before the constant tension control mechanism, the coding mechanism and the unwinding mechanism are combined into one, shortening the path of traction of the fabric and effectively avoiding the coding mechanism from causing additional resistance to the traction system, thereby ensuring the stability of the traction force of the cutting machine, effectively reducing the risk of production interruption or equipment shutdown, and improving the reliability and stability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the structure of a high-efficiency glass fiber cloth inkjet marking device; Figure 2 This is a schematic diagram of the structure of an automatic coding device for cutting wind turbine blades; Figure 3 It is a structural schematic diagram of the unwinding unit; Figure 4 It is a structural diagram of the coding mechanism (without the second baffle); Figure 5 This is a schematic diagram of the structure of the inkjet printing mechanism from another angle (without the second baffle); Figure 6 It is a structural diagram of the coding mechanism (including the second baffle); Figure 7 It is a schematic diagram of the positions of the first baffle, the second baffle and the glass fiber cloth; Figure 8 This is a schematic diagram of the positions of the spray terminal, baffle, second baffle and fiberglass cloth; Fig. 9 It is a schematic diagram of the position of the deviation-correcting mechanism and the glass fiber cloth; Fig.10 This is a schematic diagram of horizontal coding.

[0020] Reference numerals: 1, unwinding unit; 11, unwinding mechanism; 111, base; 112, unwinding shaft; 113, accommodating space; 114, first directional wheel; 115, second directional wheel; 116, third directional wheel; 117, fourth directional wheel; 12, inkjet printing mechanism; 121, bracket; 122, frame; 123, first baffle; 123a, through slot; 124, ink cartridge; 124a, inkjet terminal; 124b, baffle; 125, Driving member; 126, second baffle; 126a, fixed shaft; 127, adjusting foot; 128, tension spring; 13, constant tension control mechanism; 131, constant tension cylinder; 132, tension control balance wheel; 133, tension rod; 134, angle sensor; 135, first limiter; 136, second limiter; 2, cutting unit; 3, inkjet unit; 4, deviation correction mechanism; 41, deviation correction photoelectric sensor; 42, deviation correction guide rail; 5, frame; 01. Fiberglass cloth. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0023] like Figures 2 to 10 As shown: an automatic coding device for cutting wind turbine blades, comprising: a plurality of unwinding units 1 and a cutting unit 2 arranged in sequence; Cutting unit 2, used for cutting multiple layers of glass fiber cloth 01; refer to Figure 3 Each unwinding unit 1 includes an unwinding mechanism 11, a coding mechanism 12 and a constant tension control mechanism 13. The unwinding mechanism 11 is used to unwind the glass fiber cloth 01, and the coding mechanism 12 is used to perform coding marking on the glass fiber cloth 01. The unwinding mechanism 11 includes a base 111 and an unwinding shaft 112 disposed on the base 111, and a plurality of directional wheels, wherein the plurality of directional wheels guide the glass fiber cloth 01 to enclose a receiving space 113, and one end of the coding mechanism 12 is disposed on the base 111, and the other end is disposed in the receiving space 113, and the coding mechanism 12 is provided with a coding terminal 124a, so that the coding terminal 124a is disposed obliquely downward and is disposed parallel to the glass fiber cloth 01 at the end surface of the coding terminal 124a; The constant tension control mechanism 13 is arranged on the base 111, and is used to control the constant tension of the glass fiber cloth 01 when it is unrolled, and the coding mechanism 12 is arranged before the constant tension control mechanism 13 along the unrolling path of the glass fiber cloth 01; The unwinding mechanism 11 is driven by a servo motor controlled by a computer, and controls the pulling speed according to the cutting unit 2 and the constant tension control mechanism 13, so as to control the laying speed to be synchronized with the pulling speed and make the laying tension of the glass fiber cloth 01 constant.

[0024] By setting the coding mechanism 12 in the unwinding unit 1 and placing the coding mechanism 12 before the constant tension control mechanism 13, the coding mechanism 12 and the unwinding mechanism 11 are combined into one, which shortens the path of traction of the fabric and effectively avoids the coding mechanism 12 causing additional resistance to the traction system, thereby ensuring the stability of the traction force of the cutting machine, effectively reducing the risk of production interruption or equipment shutdown, and improving the reliability and stability of the system.

[0025] The inkjet printing mechanism 12 is arranged obliquely downward and parallel to the glass fiber cloth 01 at the end of the inkjet terminal 124a, so as to ensure that the inkjet printing can be accurately printed on the surface of the glass fiber cloth 01, and ensure the continuity and stability of the inkjet process; in addition, the inkjet terminal 124a inclined downward has the following significant advantages compared with the inkjet terminal 124a inclined upward in the prior art: To reduce the clogging of the spray hole, the spray terminal 124a tilted downward uses gravity to allow toner and impurities to flow downward naturally, avoiding the accumulation of toner or other impurities on the spray hole. On the contrary, the spray terminal 124a tilted upward or horizontally in the prior art easily causes toner and impurities to accumulate in the direction of the spray hole, increasing the risk of clogging of the spray hole. Through this design, the spray hole of the spray terminal 124a is cleaner, reducing problems such as uneven coding or shutdown caused by clogging, thereby improving the stability and production efficiency of the coding equipment.

[0026] Reduce toner residue and ensure full use of toner. The downward-sloping design allows the toner inside the inkjet terminal 124a to flow more smoothly under the action of gravity, avoiding the accumulation of toner inside the nozzle. This not only reduces toner residue, but also ensures that the toner is used more fully each time inkjet is sprayed to avoid waste. By optimizing the fluidity of the toner, the inkjet terminal 124a can maintain a high inkjet efficiency and ensure full use of the toner during the coding process, further improving the coding quality and economy.

[0027] The synchronization of cloth unwinding speed and traction speed is achieved through computer control, which avoids cloth slipping or uneven traction caused by speed mismatch, improves production efficiency, and ensures accurate synchronization of cutting and coding processes. The computer controls the servo motor and constant tension control system, and the entire unwinding, coding and cutting process is automated. Automated control reduces the possibility of manual intervention and operating errors, improves the automation level of the production line, thereby reducing human errors in the production process and improving production efficiency and product quality consistency.

[0028] As a preferred embodiment of the above, the unwinding mechanism 11 also includes a first directional wheel 114, a second directional wheel 115, a third directional wheel 116, and a fourth directional wheel 117 which are arranged in sequence along the unwinding direction of the glass fiber cloth 01; the unwinding shaft 112, the first directional wheel 114, the second directional wheel 115, and the third directional wheel 116 are surrounded by a receiving space 113, and the inkjet coding mechanism 12 is arranged in the receiving space 113; the end surface of the inkjet terminal 124a is parallel to the glass fiber cloth 01 between the second directional wheel 115 and the third directional wheel 116, and the fourth directional wheel 117 guides the glass fiber cloth 01 to the cutting machine. Specifically, through the reasonable arrangement of the directional wheels, the unwinding path of the glass fiber cloth 01 The diameter is precisely controlled to ensure that the glass fiber cloth 01 maintains consistent traction and speed during the inkjet and cutting process; the end face of the inkjet terminal 124a is parallel to the glass fiber cloth 01 between the second directional wheel 115 and the third directional wheel 116, which can ensure accurate and consistent coding, avoid coding deviation caused by cloth offset, and improve coding quality and accuracy; the setting of multiple directional wheels and the integrated design of the coding mechanism 12 simplify the structure of the equipment, reduce the complexity of mechanical parts, improve the space utilization of the equipment, reduce the floor space of the equipment, and also reduce the difficulty of maintenance and adjustment, making the equipment easier to operate and more efficient in repairing and replacing parts.

[0029] In this embodiment, the inclination angle of the spray terminal 124a is 46° to 50°. Specifically, since the end surface of the spray terminal 124a is parallel to the glass fiber cloth 01 between the second directional wheel 115 and the third directional wheel 116, that is, the angle of the glass fiber cloth 01 between the second directional wheel 115 and the third directional wheel 116 is 46° to 50°, preferably 48°. For example, when the angle is too small, the distance between the second directional wheel 115 and the third directional wheel 116 increases, resulting in an increase in the length of each unwinding unit 1, which increases the space occupied by the equipment and thus increases the length of the traction fabric. If the angle of inclination of the spray terminal 124a is too large, the volume of the accommodating space 113 surrounded by the unwinding shaft 112, the first directional wheel 114, the second directional wheel 115 and the third directional wheel 116 will be too small, which may limit the smooth guidance of the glass fiber cloth 01 and thus affect the normal operation of the equipment; by reasonably selecting the inclination angle of the spray terminal 124a, the optimization of the accommodating space 113 can be ensured, which not only avoids the increase in the length of the traction fabric caused by a too small angle, but also prevents the problem of too small space caused by a too large angle, thereby ensuring that the glass fiber cloth 01 can pass through the entire unwinding unit 1 smoothly and smoothly, and improving the stability and continuity of the equipment operation.

[0030] As a preferred embodiment of the above, Figure 4 , Figure 5 As shown, the coding mechanism 12 also includes a bracket 121 and an inkjet assembly; One end of the bracket 121 is disposed on the base 111, and the other end is provided with an inkjet assembly; The inkjet assembly includes a frame 122, a first baffle 123, an ink cartridge 124 and a driving member 125; the frame 122 is arranged on the bracket 121, the first baffle 123 is arranged in the frame 122 and is slidably connected to the frame 122, a plurality of through slots 123a are sequentially arranged on the first baffle 123, a plurality of ink cartridges 124 are arranged on the first baffle 123, and the ink jet terminals 124a of the ink cartridges 124 pass through the through slots 123a, and the driving member 125 drives the first baffle 123 to reciprocate along the width direction of the glass fiber cloth 01. Specifically, the number of ink cartridges 124 is set according to the width of the glass fiber cloth 01. In this embodiment, as shown in FIG. Fig.10 As shown, the fiberglass fabric of the wind turbine blade is 50 inches wide, i.e., 1270 mm wide, and is divided into 4 pieces, each about 300 mm wide, so a maximum of 4 codes can be sprayed at a time, so the number of ink cartridges 124 is 4, or any other number of ink cartridges 124, all within the protection scope of this application.

[0031] Coding principle: the servo motor controls the four inkjet heads to move synchronously left and right along the glass fiber cloth 01 surface. According to the CAD cloth strip coding position, the computer calculates the advance amount of coding and controls the coding; when the ink cartridge 124 moves to the right, according to the moving distance, the computer controls which points to spray ink and which points not to spray ink, forming a string of codes. Since the fabric moves in the direction shown in the figure, the sprayed code is also oblique.

[0032] In this embodiment, the coding height of a single ink cartridge 124 is 12.5mm, the width can be set by itself, and the font size is temporarily set to 25mm*8mm; each ink cartridge 124 is responsible for coding an interval of 300mm, and only 4 ink cartridges 124 are needed to cover each layer; each ink cartridge 124 is responsible for an interval of 300mm, and the width of a single font is 8mm, and a maximum of 30 fonts can be sprayed, that is, the cutting piece number cannot exceed 30 characters.

[0033] In this embodiment, a computer controls a servo motor to drive the inkjet cartridge 124 to move and spray ink. The driving member 125 drives the first baffle 123 to reciprocate along the width direction of the glass fiber cloth 01, thereby driving multiple ink cartridges 124 to work synchronously. This design enables multiple ink cartridges 124 to perform inkjet operations synchronously / asynchronously, covering a larger area of ​​the glass fiber cloth 01, thereby improving the inkjet efficiency. Through synchronous movement, large-area coding can be efficiently performed, reducing time waste in the production process and improving the efficiency of the overall production line.

[0034] In this embodiment, if Figure 6 , Figure 7 As shown, the coding mechanism 12 also includes a second baffle 126, which is arranged in parallel with the first baffle 123, and the first baffle 123 and the second baffle 126 are respectively arranged on both sides of the glass fiber cloth 01. Specifically, since the glass fiber cloth 01 is always in motion during the unwinding process, the motion causes the glass fiber cloth 01 to vibrate, and the vibration during the motion affects the accuracy and stability of inkjet. By arranging the first baffle 123 and the second baffle 126 on both sides of the glass fiber cloth 01, the unstable factors caused by the vibration of the cloth can be effectively offset or reduced, thereby maintaining the relative position between the inkjet head and the glass fiber cloth 01 stable, and ensuring the accuracy and consistency of the coding quality.

[0035] Among them, the gap between the first baffle 123 and the second baffle 126 is 3mm to 6mm. Preferably, the gap between the first baffle 123 and the second baffle 126 is 4mm. By controlling the gap between the baffles, the stability of the cloth during the inkjet process is guaranteed, and the accuracy and inkjet quality of the inkjet head are improved, which helps to reduce unclear coding or deviation caused by cloth instability or inkjet head errors, thereby improving production efficiency and product quality.

[0036] Since the distance between the first baffle 123 and the second baffle 126 is only 3 mm to 6 mm, the distance is relatively small, which increases the difficulty of installing the fiberglass cloth 01 on site, so the second baffle 126 is further optimized to facilitate the installation of the fiberglass cloth 01, as follows: As a preferred embodiment of the above, continue to refer to Figure 6The inkjet printing mechanism 12 also includes an adjusting foot 127. A fixed shaft 126a is provided on the back of the second baffle 126. The two adjusting feet 127 are in a V-shaped structure, one end of which is hinged to the bracket 121, and the other end is connected to the fixed shaft 126a. A tension spring 128 is provided between the adjusting foot 127 and the bracket 121, and a limiter is provided on the bracket 121. By pulling the adjusting foot 127, the second baffle 126 is driven away from or close to the first baffle 123, and the distance between the first baffle 123 and the second baffle 126 is changed, thereby increasing the space for installing the fiberglass cloth 01, reducing manual intervention and installation difficulty, and improving production efficiency; the design of the adjusting foot 127 and the tension spring 128 enables the operator to easily adjust the position of the second baffle 126, the tension spring 128 provides the necessary elastic support, and the limiter ensures that the movement of the baffle does not exceed the set range, thereby avoiding damage to the equipment structure.

[0037] In this embodiment, reference Figure 8 A baffle 124b is provided on the side wall of the inkjet terminal 124a, and the baffle 124b is set 1mm to 2mm higher than the end surface of the inkjet terminal 124a, so as to ensure the spacing between the inkjet terminal 124a and the glass fiber cloth 01. Through the action of the baffle 124b, it can be ensured that the inkjet terminal 124a maintains a predetermined distance from the surface of the glass fiber cloth 01 during the inkjet process, thereby avoiding unstable inkjet quality caused by too small or too large a spacing. For example, too small a spacing may cause the inkjet head to contact the surface of the glass fiber cloth 01, affecting the inkjet accuracy; and too large a spacing may cause uneven ink jetting or blurred coding. By setting the height of the baffle 124b, the distance during the inkjet process can be accurately controlled to ensure the accuracy and consistency of the inkjet effect.

[0038] As a preferred embodiment of the above, continue to refer to Figure 3 The constant tension control mechanism 13 includes a constant tension cylinder 131, a tension control balance wheel 132, a tension rod 133, an angle sensor 134, a first limiter 135 and a second limiter 136; Two tension rods 133 are arranged on both sides of the base 111 and are hinged to the base 111. An angle sensor 134 is arranged at the hinge to detect the angle of the tension rod 133. One end of the constant tension cylinder 131 is hinged to the base 111, and the other end is hinged to one end of the tension rod 133. The tension control balance wheel 132 is arranged at the other end of the tension rod 133, and the tension control balance wheel 132 is arranged between the third directional wheel 116 and the fourth directional wheel 117. The first limit member 135 and the second limit member 136 are arranged on the base 111 on both sides of the tension rod 133, and are used to limit the maximum angle and the minimum angle of the tension rod 133. The angle sensor 134 is linked to the computer-controlled servo motor of the unwinding mechanism 11.

[0039] Specifically, the constant tension cylinder 131 maintains consistent tension during the extension and retraction process of the cylinder. When not working, the tension control balance wheel 132 stops at the minimum position A. When placing cloth, the tension control balance wheel 132 is set to the middle position B, and B is set as the reference position, and the angle sensor 134 records the angle B°.

[0040] When releasing the cloth, if the cloth tension is too large, the tension control balance wheel 132 deviates to the position C, and the angle sensor 134 detects the deviation reference angle +B°, and the angle deviation is sent to the computer-controlled motor of the unwinding mechanism 11 to speed up the cloth release; if the cloth tension is too small, the tension control balance wheel 132 deviates to the position A, and the angle sensor 134 detects the deviation reference angle -B°, and the angle deviation is sent to the computer-controlled motor of the unwinding mechanism 11 to slow down the cloth release; according to the position of the tension control balance wheel 132, from a microscopic state, the computer always controls the motor to accelerate / decelerate the cloth release, so that the tension control balance wheel 132 is in a dynamic equilibrium position B; from a macroscopic state, the tension control balance wheel 132 swings left and right as the cloth release tension changes; if the PID control is well adjusted, the tension control balance wheel 132 swings only slightly, and the cloth release tension is also balanced at the set value at this time, and changing the tension of the constant tension cylinder 131 can conveniently change the cloth release tension.

[0041] The angle sensor 134 is linked with the computer-controlled servo motor of the unwinding mechanism 11 to detect the angle change of the tension rod 133 in real time. The computer-controlled servo motor of the unwinding mechanism 11 automatically adjusts the unwinding speed according to the tension change. When the tension of the glass fiber cloth 01 is too large, the computer controls the motor to accelerate the cloth release; when the tension is too small, the motor slows down the cloth release. The whole process does not require manual intervention, which greatly improves production efficiency and reduces the possibility of manual operation errors, ensuring the automation and accuracy of the production line.

[0042] During the dynamic cloth placement process, the cloth will drift forward and backward as shown in the figure, which will directly affect the accuracy of the inkjet coding position. Therefore, the cloth placement must be corrected and controlled, so the following improvements are made: In this embodiment, reference Figure 3 , Fig. 9 , further comprising a frame 5 and a correction mechanism 4, the correction mechanism 4 comprising a correction photoelectric sensor 41, a correction motor and a correction guide rail 42; The correcting guide rail 42 is arranged on the frame 5 along the width direction of the glass fiber cloth 01, and the base 111 is slidably arranged on the correcting guide rail 42; the correcting photoelectric sensor 41 is arranged on the frame 5 and located on the outside of the fiber cloth, and is used to correct the position of the fiber cloth in the width direction; the correcting motor is used to drive the base 111 to move on the correcting guide rail 42.

[0043] The deflection correction sensor uses the ground as a reference (frame 5 is fixed on the ground) to detect the edge of the cloth without contact. The entire unwinding device is installed on frame 5, and it can move back and forth on the guide rail of frame 5 as shown in the figure. When the deflection correction sensor finds that the edge of the cloth moves toward the "inside" in the figure, the sensor sends a command to the correction motor, which moves the entire cloth-releasing device toward the "outside" in the figure until the edge of the cloth returns to the reference position of the deflection correction sensor, thereby ensuring that the edge of the cloth is always stable to facilitate accurate coding.

[0044] The correcting photoelectric sensor 41 detects the position of the edge of the cloth without contact, and adjusts the position of the fiberglass cloth 01 in real time according to the detection result, ensuring that the cloth is always in the correct position in the width direction during the unwinding process. Through the real-time adjustment of the correcting mechanism 4, the inkjet head can always accurately spray to the correct position, avoiding the deviation or unclear coding caused by the deviation of the cloth during the inkjet process, and significantly improving the coding accuracy.

[0045] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An automatic coding device for cutting wind turbine blades, characterized in that: It includes a plurality of unwinding units and a cutting unit arranged in sequence; The cutting unit is used to cut multiple layers of glass fiber cloth; Each of the unwinding units comprises an unwinding mechanism, a coding mechanism and a constant tension control mechanism, wherein the unwinding mechanism is used to unwind the glass fiber cloth, and the coding mechanism is used to perform coding marking on the glass fiber cloth; The unwinding mechanism includes a base, an unwinding shaft arranged on the base, and a plurality of directional wheels, wherein the plurality of directional wheels guide the glass fiber cloth to enclose a storage space, one end of the coding mechanism is arranged on the base, and the other end is arranged in the storage space, and the coding mechanism is provided with a spraying terminal, so that the spraying terminal is arranged obliquely downward and parallel to the glass fiber cloth on the end surface of the spraying terminal; The constant tension control mechanism is arranged on the base, and is used to control the constant tension of the glass fiber cloth when it is unrolled, and along the path direction of the glass fiber cloth unrolling, the coding mechanism is arranged before the constant tension control mechanism; The unwinding mechanism is driven by a servo motor controlled by a computer, and controls the traction speed according to the cutting unit and the constant tension control mechanism, so as to control the synchronism between the cloth-releasing speed and the traction speed, and make the cloth-releasing tension of the glass fiber cloth constant.

2. The automatic coding device for cutting wind turbine blades according to claim 1 is characterized in that: The unwinding mechanism also includes a first directional wheel, a second directional wheel, a third directional wheel, and a fourth directional wheel which are sequentially arranged along the unwinding direction of the fiberglass cloth; the unwinding shaft, the first directional wheel, the second directional wheel, and the third directional wheel are arranged to form the accommodating space, and the inkjet coding mechanism is arranged in the accommodating space; the end surface of the inkjet coding terminal is parallel to the fiberglass cloth between the second directional wheel and the third directional wheel, and the fourth directional wheel guides the fiberglass cloth to the cutting machine.

3. The automatic coding device for cutting wind turbine blades according to claim 2 is characterized in that: The inclination angle of the spray dock is 46° to 50°.

4. The automatic coding device for cutting wind turbine blades according to claim 1 is characterized in that: The coding mechanism also includes a bracket and an inkjet assembly; One end of the bracket is arranged on the base, and the other end is provided with the inkjet assembly; The inkjet assembly includes a frame, a first baffle, an ink cartridge and a driving member; the frame is arranged on the bracket, the first baffle is arranged in the frame and is slidably connected to the frame, a plurality of through grooves are sequentially arranged on the first baffle, a plurality of ink cartridges are arranged on the first baffle, and the ink jet terminals of the ink cartridges pass through the through grooves, and the driving member drives the first baffle to reciprocate along the width direction of the glass fiber cloth.

5. The automatic coding device for cutting wind turbine blades according to claim 4 is characterized in that: The coding mechanism further includes a second baffle, which is arranged in parallel with the first baffle, and the first baffle and the second baffle are respectively arranged on both sides of the glass fiber cloth.

6. The automatic coding device for cutting wind turbine blades according to claim 5 is characterized in that: A gap between the first baffle and the second baffle is 3 mm to 6 mm.

7. The automatic coding device for cutting wind turbine blades according to claim 5 is characterized in that: The inkjet coding mechanism also includes an adjusting foot. A fixed shaft is provided on the back of the second baffle. The two adjusting feet are in a V-shaped structure, one end of which is hinged to the bracket and the other end is connected to the fixed shaft. A tension spring is provided between the adjusting foot and the bracket. A limit piece is provided on the bracket. The second baffle is driven away from or close to the first baffle by pulling the adjusting foot.

8. The automatic coding device for cutting wind turbine blades according to claim 1 is characterized in that: The side wall of the spray terminal is provided with a baffle, and the baffle is arranged 1mm to 2mm higher than the end surface of the spray terminal.

9. The automatic coding device for cutting wind turbine blades according to claim 2 is characterized in that: The constant tension control mechanism includes a constant tension cylinder, a tension control balance wheel, a tension rod, an angle sensor, a first limiter and a second limiter; The two tension rods are arranged on both sides of the base and are hinged to the base. The angle sensor is arranged at the hinge to detect the angle of the tension rod; one end of the constant tension cylinder is hinged to the base, and the other end is hinged to one end of the tension rod. The tension control balance wheel is arranged at the other end of the tension rod, and the tension control balance wheel is arranged between the third directional wheel and the fourth directional wheel; the first limit member and the second limit member are arranged on the base on both sides of the tension rod, and are used to limit the maximum angle and the minimum angle of the tension rod. The angle sensor is linked to the computer-controlled servo motor of the unwinding mechanism.

10. The automatic coding device for cutting wind turbine blades according to claim 1 is characterized in that: It also includes a frame and a deviation correction mechanism, wherein the deviation correction mechanism includes a deviation correction photoelectric sensor, a deviation correction motor and a deviation correction guide rail; The deflection correction guide rail is arranged on the frame along the width direction of the glass fiber cloth, and the base is slidably arranged on the deflection correction guide rail; the deflection correction photoelectric sensor is arranged on the frame and located on the outside of the fiber cloth, and is used to correct the position of the fiber cloth in the width direction; the deflection correction motor is used to drive the base to move on the deflection correction guide rail.

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