Foil reloading and conveying device for foil winding machine

Abstract

The invention relates to the technical field of transformer processing, in particular to a foil reloading and conveying device for a foil winding machine, which comprises a first support frame, a feeding mechanism, a connecting mechanism and a tensioning mechanism, the first support frames are distributed left and right; the feeding mechanism comprises a driving roller, a driven roller, a first motor and a conveying belt. The conveying belt is further provided with a plurality of evenly-distributed supporting bases so that the roll type foil can be loaded and moved to a preset position. The fixing frame is further provided with a bearing structure used for driving the foil to conduct rotary conveying operation. The connecting mechanism comprises a second supporting frame, a first roller and a second motor. A connecting piece is further arranged on the second supporting frame and located on the right side of the first roller so that welding and grinding operation of the ends of the two adjacent rolls of foil can be completed. The tensioning mechanism comprises a tensioning frame, a second roller, a third roller and a fourth roller. The device is reasonable in structural design, the efficient operation of foil material changing, connecting and polishing treatment can be achieved, and meanwhile the conveying operation of automatically adjusting the foil material conveying tension force and intelligently correcting is further completed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transformer processing and foil conveying, and particularly relates to a foil material replacement conveying device for a foil winding machine. BACKGROUND

[0002] The foil winding machine, full name foil winding machine, is a kind of precision industrial equipment specially used for manufacturing the core components of power equipment such as dry-type transformers and reactors, namely foil winding. The products produced by the foil winding machine are mainly used for: 1. Dry-type power transformers: this is the main application field of the foil winding machine, especially the low-voltage winding of SC(B)10, SC(B)11 and other series. 2. Reactors: such as filter reactors, shunt reactors and the like. 3. Special transformers: such as rectifier transformers, furnace transformers and the like. 4. New energy field: transformers in photovoltaic, wind power and other box-type transformer substations. The basic working principle of the foil winding machine can be summarized as: unwinding, straightening, conveying, shearing and winding. Although the foil conveying system of the existing foil winding machine is constantly improving, there are still some technical problems and development bottlenecks.

[0003] Firstly, the replacement of the foil material and the welding process have low automation. The specific problems are as follows: when the existing conveying equipment needs to replace a new roll of foil after a roll of foil is used up, it needs to be stopped and a series of operations such as threading, traction, shearing and welding are performed manually. This process takes a long time, and the welding quality depends on the worker's technology, which has a great restriction. This is one of the important problems restricting the efficient production and processing of dry-type transformers by the foil winding machine.

[0004] Secondly, in the conveying stage of the foil material, the existing foil conveying system (such as magnetic powder brake controlled tension) has problems such as response lag, nonlinearity, and being easily affected by temperature. At the moment of high-speed start-stop, replacement or welding, the tension will fluctuate, causing the local tension of the tension structure to be uneven, which easily causes the "edge collapse" or "edge lifting" phenomenon of the foil material in the conveying stage; it seriously affects the tightness and flatness of the dry-type transformer winding, thereby reducing the electrical performance of the transformer, increasing the loss, etc. At the same time, the correction of the foil material conveying is not complete or timely for ultra-thin or ultra-thick foil materials, which easily causes the foil material to deviate during the conveying process, cannot be neatly wound on the core of the transformer, and greatly reduces the processing quality of the transformer. This is one of the problems that need to be solved to restrict the high-quality production of the foil winding machine for dry-type transformers. SUMMARY

[0005] In order to solve the above-mentioned shortcomings and deficiencies of the existing foil conveying, the present application provides a foil material replacement conveying device for a foil winding machine, which has a reasonable structure, realizes efficient operation of foil material replacement-connection-polishing processing, automatically adjusts the tension of the foil material conveying, and intelligently corrects the conveying operation.

[0006] The application achieves the above-mentioned objectives by adopting the following technical solutions: The foil material replacement conveying device for the foil winding machine comprises a first support frame, a feeding mechanism, a connecting mechanism and a tensioning mechanism. The first support frame is distributed left and right. The feeding mechanism comprises a driving roller, a driven roller, a first motor and a conveying belt. The driving roller and the driven roller are respectively rotatably arranged on the right and left sides of the first support frame. The first motor is fixedly installed on the first support frame through a support and is connected with the driving roller. The conveying belt is arranged between the driving roller and the driven roller. A plurality of uniformly distributed support seats are further arranged on the conveying belt to enable the roll-type foil material to be loaded and moved to a preset position. A fixing frame is further arranged on the right side of the first support frame. A bearing structure is further arranged on the fixing frame to drive the foil material to rotate and convey. The connecting mechanism comprises a second support frame, a first roller and a second motor. The second support frame is vertically distributed and connected with the first support frame. The first roller is arranged in two layers and is rotatably arranged on the second support frame. The second motor is arranged on the second support frame and is connected with one of the first rollers. A connecting piece is further arranged on the second support frame and located on the right side of the first roller to complete the welding and polishing of the end portions of the adjacent two rolls of foil material. The tensioning mechanism comprises a tensioning frame, a second roller, a third roller and a fourth roller. The tensioning frame is distributed left and right and is connected with the second support frame. The second roller is arranged in two groups horizontally and is rotatably arranged on the tensioning frame. The third roller is arranged between the two second rollers and can move up and down. The fourth roller is arranged in two layers and is located on the right side of the right second roller. A double sprocket is arranged on the right second roller. A third motor is further arranged at one end of the double sprocket. Single sprockets are arranged on the left second roller and the fourth roller. The double sprocket and the single sprocket are connected through a chain to realize transmission.

[0007] In order to realize the automatic coaxial fixing of the roll-type foil material after material replacement and the stable conveying operation of real-time opening and rotation, the application adopts a preferred technical solution: the bearing structure comprises a first hydraulic cylinder, an extension rod, a lifting plate, a second hydraulic cylinder and a mounting seat. The first hydraulic cylinder is distributed front and back. One end is connected with the fixing frame, and the other end is connected with the lifting plate. One end of the extension rod is welded and fixed with the fixing frame, and the other end is welded and fixed with the lifting plate. The second hydraulic cylinder is vertically distributed. One end is connected with the lifting plate, and the other end is connected with the mounting seat.

[0008] In order to drive the newly replaced roll-type foil material to separate from the conveying belt and perform orderly conveying operation of the foil material, and ensure the stability of the basic rotation, the application adopts a preferred technical solution: a rotating part is further arranged on the mounting seat. The rotating part comprises a rotating motor and a sleeve. The rotating motor is fixedly installed on the mounting seat through a support. The sleeve is arranged on the output shaft of the rotating motor. A fastening column is further connected in the sleeve through threads. A fastening groove is arranged in the fastening column. The cross section of the fastening groove is a trapezoidal structure with wide outside and narrow inside.

[0009] In order to realize more reasonable and automatic winding foil feeding, change material orderly, realize seamless connection of foil conveying operation, minimize the interval time of foil change roll, improve the conveying efficiency of foil, the application adopts a preferred technical scheme: the support seat is three groups of front and back symmetry and equal interval distribution; The clamping groove is also provided on the support seat, which is a U-shaped structure, which is suitable for the center shaft structure of the winding foil; A first infrared sensor is arranged on the side of the first support frame and corresponds to the position of the rotating motor, and the first infrared sensor is signal connected with the first motor.

[0010] In order to solve the problem that the existing winding foil needs to stop for a series of operations such as threading, traction, shearing and welding, manual roll changing, manual welding and manual polishing, realize integrated efficient connection of foil end to end and polishing treatment of joint, improve the smoothness of the connection of the foil, and improve the conveying efficiency of the foil and the production quality of the dry-type transformer, the application adopts a preferred technical scheme: the connecting piece includes a bottom plate, a beam frame, a pressing structure, a third hydraulic cylinder, a laser welding machine and a polishing structure; The bottom plate is arranged on the second support frame, and is located on the right side of the first roller, and the upper end surface of the bottom plate is flush with the horizontal plane of the central axis of the two first rollers arranged vertically; The beam frame is a U-shaped structure and is arranged on the second support frame and above the bottom plate; The pressing structure is used for fixing the two end portions of the adjacent two rolls of foil; The third hydraulic cylinder is vertically distributed and the top end is arranged on the beam frame through a top plate, and the other end is provided with the laser welding machine through a connecting plate; The top plate is moved forward and backward by a first drive; The first drive includes a moving motor, a guide rod and a threaded rod; The guide rod and the threaded rod are arranged in front of and behind the beam frame, and the guide rod is above the threaded rod, and the top plate is threadedly connected with the threaded rod and slidably connected with the guide rod; The moving motor is fixedly installed on the beam frame through a support and connected with the threaded rod; The polishing structure is used for polishing the joint of the welded foil.

[0011] In order to realize the accurate positioning and fixing of the position of the tail end of the last roll of foil and the front end of the new roll of foil, and provide a strong foundation for subsequent efficient and accurate foil connection, the application adopts a preferred technical scheme: the pressing structure is two groups of left and right symmetrically distributed, each group of the pressing structure includes a fourth hydraulic cylinder and a pressing plate; The fourth hydraulic cylinder is vertically arranged on the beam frame, and the bottom end is connected with the pressing plate, wherein the pressing plate is made of hard rubber material; And a second infrared sensor is arranged on the lower end surface of the pressing plate, and the second infrared sensor is signal connected with the fourth hydraulic cylinder.

[0012] In order to realize more reasonable structure, improve the space layout effect on the basis of foil connecting joint more quickly polishing processing, ensure the stability of foil connecting joint while improving the smoothness of foil connection, the application adopts a preferred technical scheme: the polishing structure includes a polishing motor and a polishing disc; the polishing motor is arranged on the connecting plate through a support and located at the rear side of the laser welding machine; the polishing disc is arranged on the output shaft of the polishing motor and composed of a disc and a copper wire brush arranged on the disc; the end face of the polishing disc is protruded outward by 2-5mm compared with the welding nozzle of the laser welding machine.

[0013] In order to solve the problem that the tension of the foil fluctuates during the roll changing or welding, resulting in that the local tension of the tension structure is not uniform, and the foil is prone to "edge collapse" or "edge lifting" during the conveying stage, the application adopts a preferred technical scheme: the front and rear ends of the third roller are provided with connecting columns, and the third roller is moved up and down through a second drive; the second drive includes an adjusting motor, an adjusting screw and an auxiliary rod; the adjusting screw is vertically arranged on the tension frame, the auxiliary rod is symmetrically arranged on the left and right sides of the adjusting screw, and the connecting column is threadedly connected with the adjusting screw and slidably connected with the auxiliary rod; the adjusting motor is arranged on the tension frame and connected with the adjusting screw.

[0014] In order to solve the problem that the foil is prone to deviation during the conveying process due to incomplete or untimely correction, and cannot be neatly wound on the core of the transformer, resulting in that the processing quality of the transformer is greatly reduced, the application adopts a preferred technical scheme: a correction structure is further arranged between the tension frame and the second support frame; the correction structure includes a correction frame, a correction plate and a third infrared sensor and a third drive; the correction frame is in U-shaped structure and fixedly installed at the right end of the second support frame; the correction plate is composed of a first plate and a second plate, the first plate is provided with a connecting sleeve, the second plate is provided with a connecting rod, and the connecting rod and the connecting sleeve are in a sleeved structure; the cross section of the connecting sleeve is in square structure; the distance between the front and rear connecting sleeves is equal to the width of the foil; the third infrared sensor is arranged on the tension frame and used for monitoring the front side of the foil and correcting the operation through the third drive.

[0015] The application adopts a preferred technical scheme: the third drive includes a correction motor, a correction screw and a correction guide rod; the correction screw penetrates through the left side of the first plate and threadedly connected with the first plate; the correction guide rod penetrates through the right side of the first plate and slidably connected with the first plate; the correction screw and the correction guide rod are arranged in the correction frame in an extending manner; the correction motor is installed in the correction frame through a support and connected with the correction screw.

[0016] The beneficial effects of the present application compared with the prior art are: on the basis of analyzing the beneficial effects of the corresponding structural innovation concept of the present application, the present application optimizes the space design structure, realizes efficient operation of foil material replacement-connection-polishing treatment, avoids the long-time interruption and low efficiency of traditional foil material replacement production, improves the optimization treatment mode of the foil material welding place, solves the problem of dry-type transformer winding defects caused by the increase of thickness and uneven quality of the traditional foil material welding joint; at the same time, the present application realizes automatic adjustment of foil material conveying tension, ensures the tightness and production quality of subsequent dry-type transformer winding operation, further realizes intelligent correction conveying operation of the foil material, avoids the problem of frequent manual intervention adjustment, further improves the production quality, and at the same time, the product quality consistency is also guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 is a perspective view of the overall structure of the present application; Figure 2 is a top view of Figure 1 ; Figure 3 is a perspective view of the feeding mechanism of the present application; Figure 4 is a perspective view of the bearing structure of the present application; Figure 5 is a sectional view of the fastening column of the present application; Figure 6 is a structural schematic view of the connecting mechanism of the present application; Figure 7 is a schematic view of the polishing structure of the present application; Figure 8 is a structural perspective view of the tensioning mechanism of the present application; Figure 9 is an enlarged view of the A part structure in Figure 8 ; Figure 10 is a schematic view of the correction structure of the present application; Figure 11 is a structural schematic view of the first drive of the present application.

[0019] In the figure: 1, first support frame; 11, fixed frame; 12, bearing structure; 121, first hydraulic cylinder; 122, telescopic rod; 123, hoisting plate; 124, second hydraulic cylinder; 125, mounting seat; 13, rotating part; 131, rotating motor; 132, clamping sleeve; 133, fastening column; 134, fastening groove; 2, feeding mechanism; 21, driving roller; 22, driven roller; 23, first motor; 24, conveying belt; 25, support seat; 251, clamping groove; 26, first infrared sensor; 3, connecting mechanism; 31, second support frame; 32, first roller; 321, second motor; 33, connecting piece; 331, bottom plate; 332, cross beam frame; 333, third hydraulic cylinder; 334, laser welding machine; 34, pressing structure; 341, fourth hydraulic cylinder; 342, pressing plate; 343, second infrared sensor; 35, polishing structure; 351, polishing motor; 352, polishing disc; 353, disc; 354, copper wire brush; 36, top plate; 37, connecting plate; 38, first drive; 381, moving motor; 382, guide rod; 383, threaded rod; 4, tensioning mechanism; 41, tensioning frame; 42, second roller; 43, third roller; 431, connecting column; 44, fourth roller; 45, second drive; 451, adjusting motor; 452, adjusting screw; 453, auxiliary rod; 46, double chain wheel; 47, third motor; 48, single chain wheel; 49, chain; 5, straightening structure; 51, straightening frame; 52, straightening plate; 521, first plate; 522, second plate; 523, connecting sleeve; 524, connecting rod; 53, third infrared sensor; 54, third drive; 541, straightening motor; 542, straightening screw; 543, straightening guide rod. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] It should be noted that in the specific embodiments of the present application, the relationship terms such as "first" and "second" and the like that may appear are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between the entities or operations. Moreover, the terms such as "include", "contain" or any other variants that may appear are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. The limiting elements that may appear, such as "including one", do not exclude the presence of other identical elements in the process, method, article or device including the elements, without more limitations.

[0022] In the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "provided with" that may appear should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0023] Embodiment: as shown in Figures 1 to 11 A foil material changing and conveying device for a foil winding machine, the conveying device comprising a first support frame 1, a feeding mechanism 2, a connecting mechanism 3 and a tensioning mechanism 4. The first support frame 1 is distributed left and right; the first support frame 1 comprises a support leg structure, which is used to realize the effect of structural support. Among them, as shown in Figure 1 and 3 ​The structure shown: the feeding mechanism 2 includes a driving roller 21, a driven roller 22, a first motor 23, a conveying belt 24. The driving roller 21 and the driven roller 22 are respectively rotatably arranged on the right and left sides of the first support frame 1, the left end of the first support frame is a foil feeding area, and the right end of the first support frame is a foil conveying operation area. The first motor 23 is fixedly installed on the first support frame 1 through a support and is connected with the driving roller 21; the first motor 23 preferably adopts a servo control motor. The conveying belt 24 is arranged between the driving roller 21 and the driven roller 22, and a plurality of uniformly distributed support seats 25 are further arranged on the conveying belt 24. The first motor is started to drive the driving roller to rotate synchronously, and then drive the conveying belt to rotate stably under the cooperation of the driving roller and the driven roller, so that the roll-type foil loaded after feeding is moved to a preset position. The preset position is the setting position of the first infrared sensor, that is, the position of the foil rotating conveying operation. Among them, the diameters of the driving roller and the driven roller are large enough, so that the turning radius of the support seat is large enough to adapt to the setting of the receiving frame below the conveying belt for collecting the central shaft of the falling roll-type foil.

[0024] As shown in Figures 1-3 : In this embodiment, in order to realize more reasonable and automatic roll-type foil feeding, material changing and orderly operation, realize seamless connection of foil conveying operation, minimize the interval time of foil roll changing, and improve the conveying efficiency of the foil, the present application adopts a preferred technical scheme: the support seat 25 is three groups of front and back symmetrical and equidistant distribution; the state presented on the conveying belt is an isosceles triangle distribution structure, that is, one of the support seats is located at the set position of the feeding area (left side of the conveying belt), used for receiving the roll-type foil (to be used) dropped by the hoisting mechanical equipment. One of the support seats is located at the set position of the operation area (right side of the conveying belt), used for regular conveying operation of the roll-type foil (being used). The last support seat is located at the lower end surface of the conveying belt, used for waiting for use. The support seat 25 is further provided with a clamping groove 251, which is a U-shaped structure suitable for the center shaft structure of the roll-type foil; the center shaft of the roll-type foil is mainly used for winding the foil and performing convenient transportation and hoisting operation, which is a known prior art in the industry, and therefore will not be described here. A first infrared sensor 26 is arranged at a position corresponding to the rotating motor 131 on one side of the first support frame 1 and is in signal connection with the first motor 23. The first infrared sensor 26 is used to monitor the position of the roll-type foil to be used moving to the operation area in real time, accurately control, and facilitate the subsequent rotating motor to stably rotate and convey the foil.

[0025] As shown in Figure 3As shown in the embodiment, the first support frame 1 right side is also provided with a fixed frame 11, and the fixed frame 11 is also provided with a bearing structure 12 for driving the foil to rotate and transport; wherein the fixed frame 11 is a U-shaped structure as a whole, and is distributed in front and back, and is fixed by welding with the first support frame 1. In order to realize the automatic coaxial fixing of the roll type foil material after material replacement and the real-time opening rotation for stable conveying operation, the application adopts a preferred technical scheme: as shown in the figure Figure 4 As shown in the figure, the bearing structure 12 includes a first hydraulic cylinder 121, an extension rod 122, a lifting plate 123, a second hydraulic cylinder 124 and a mounting seat 125. The first hydraulic cylinder 121 is distributed in front and back, one end is connected and fixed with the fixed frame 11, and the other end is connected with the lifting plate 123; the first hydraulic cylinder is located outside the fixed frame. One end of the extension rod 122 is welded and fixed with the fixed frame 11, and the other end is welded and fixed with the lifting plate 123; the extension rod is mainly used for auxiliary support of the lifting plate. The aluminum foil or copper foil used for dry-type transformer is generally not more than 33Kg in weight, so the hydraulic cylinder and lifting plate structure distributed on both sides in this embodiment are enough to support the weight of single roll foil. The second hydraulic cylinder 124 is vertically distributed, one end is connected with the lifting plate 123, and the other end is connected and fixed with the mounting seat 125. The extension change of the first hydraulic cylinder is mainly used for unloading and loading fixing operation of the roll type foil. The use of the second hydraulic cylinder is mainly to adapt to different specifications and models of foil spool, and to drive the roll type foil to move up and separate from the contact with the support seat, reduce the rotation friction, and improve the effect of foil conveying.

[0026] As shown in the figure Figure 4 In this embodiment, in order to drive the newly replaced roll type foil to separate from the contact with the conveying belt 24 and perform ordered conveying operation of the foil, and ensure the stability of the basic rotation, the application adopts a preferred technical scheme: a rotating part 13 is also arranged on the mounting seat 125, and the rotating part 13 includes a rotating motor 131 and a sleeve 132. The rotating motor 131 is fixedly installed on the mounting seat 125 through a support, the sleeve 132 is arranged on the output shaft of the rotating motor 131, a fastening column 133 is threadedly connected in the sleeve 132, a fastening groove 134 is arranged in the fastening column 133, and the cross section of the fastening groove 134 is a trapezoidal structure with wide outside and narrow inside; for details, see Figure 5The diameter of the deepest part of the fastening groove is still smaller than the outer diameter of the central shaft of the minimum size of the roll-shaped foil. In this way, when the new roll-shaped foil to be used moves to the monitoring position of the first infrared sensor, the first hydraulic cylinder is elongated, and the mounting seat is lowered by a preset height, which is an initial fixed parameter. At this time, the central axis of the fastening column is consistent with the axis of the central shaft of the roll-shaped foil. The first hydraulic cylinder is retracted (in the initial state, the first hydraulic cylinder is elongated, and the fastening column does not interfere with the central shaft of the roll-shaped foil). The fastening column is sleeved on the central shaft of the roll-shaped foil and is in extrusion contact with the inner wall of the inclined surface of the fastening groove. Next, the rotating motor is turned on, and the rotating motor is turned on to drive the sleeve to rotate synchronously. The sleeve and the fastening column are connected by threads, and the central shaft of the roll-shaped foil is in extrusion contact with the inner wall of the fastening column, forming an "end fixed". Therefore, the rotating motor is turned on to rotate the fastening column relative to the sleeve and move outward. Due to the special inclined surface structure of the fastening groove, the fastening column will gradually extrude the central shaft until a firm "integrated structure" is formed. At this time, the central shaft of the roll-shaped foil, the fastening column and the sleeve form an integral whole, so that the rotating motor continues to rotate to drive the roll-shaped foil to rotate stably. When the roll-shaped foil is unloaded and transported, the external auxiliary fixing device (hydraulic clamping jaw, etc.) or manual recovery (manual recovery of the central shaft) is used, and the two rotating motors are turned on in reverse. At this time, the central shaft of the roll-shaped foil is not moved, and the rotating motor is reversed to move the fastening column inward relative to the sleeve. At this time, the fastening column will unlock the fixation of the central shaft, and then the recovery operation of the central shaft can be performed.

[0027] As shown in Figure 1 and Figure 6 : In this embodiment, the connecting mechanism 3 includes a second support frame 31, a first roller 32 and a second motor 321. The second support frame 31 is vertically distributed and connected to the left end of the first support frame 1. The first roller 32 is two up and down distributed rollers and is rotatably arranged on the second support frame 31. The two first rollers are close to each other with a gap, which is suitable for the thickness of the foil for conveying operation. The second motor 321 is arranged on the second support frame 31 and connected with one of the first rollers 32; that is, the second motor 321 drives the first roller to rotate. The driving conveying power of the first roller is the front end of the entire connecting mechanism, which ensures the orderly conveying of the foil. The second motor also uses a servo control motor. In this embodiment, the second support frame 31 and the right side of the first roller 32 are also provided with a connecting piece 33 to complete the welding and polishing operation of the end of the adjacent two rolls of foil.

[0028] As shown in Figure 6The present application is shown: in order to solve the existing technology volume foil need to stop the series of operations such as threading, traction, shearing and welding, manual change volume, manual welding, and then manual polishing multi-process operation time-consuming and laborious problem, realize the integration of efficient foil end to end connection and polishing treatment at the joint, improve the smoothness of the foil connection, and then improve the foil conveying efficiency and dry-type transformer production quality, the present application adopts a preferred technical scheme: the connecting piece 33 includes the bottom plate 331, the beam frame 332, the pressing structure 34, the third hydraulic cylinder 333, the laser welding machine 334 and the polishing structure 35. The bottom plate 331 is arranged on the second support frame 31, and is located on the right side of the first roller 32, and the upper end surface of the bottom plate 331 is flush with the horizontal plane of the central axis of the two first rollers 32 arranged vertically. The purpose of such arrangement is to provide a large enough plane to provide favorable conditions for the subsequent end-to-end fixation and welding and polishing process of the foil. The beam frame 332 is a U-shaped structure and is arranged on the second support frame 31 and above the bottom plate 331. The purpose of such arrangement is to provide a mounting basis for welding and polishing. Figure 7 The pressing structure 34 is used to complete the fixation of the two end portions of the adjacent two volumes of foil. The third hydraulic cylinder 333 is arranged vertically on the beam frame 332 through the top plate 36, and the laser welding machine 334 is installed on the bottom end of the third hydraulic cylinder 333 through the connecting plate 37. The top plate 36 moves forward and backward through the first drive 38. As shown in Figure 11 The first drive 38 includes a moving motor 381, a guide rod 382 and a threaded rod 383. The guide rod 382 and the threaded rod 383 are arranged in front of and behind the beam frame 332, and the guide rod 382 is above the threaded rod 383. The top plate 36 is threadedly connected with the threaded rod 383 and slidably connected with the guide rod 382. The moving motor 381 is fixedly installed on the beam frame 332 through a support and connected with the threaded rod 383. The polishing structure 35 is used for polishing the welded foil joint. In this way, the moving motor is also a servo control motor. When the moving motor starts to rotate forward, the threaded rod will rotate clockwise, and the top plate connected with the guide rod and the threaded rod will move forward under the auxiliary limiting action of the guide rod (in the initial state, the top plate is located at the last side). In this way, the laser welding machine installed on the connecting plate can move forward, and the end portion connection processing of the new and old foils can be completed. When the moving motor reverses, the laser welding machine will move backward. The moving motor can complete the end portion connection processing of the new and old foils in one operation.

[0029] As shown in Figure 7As shown: in order to realize the structure is more reasonable, improve the space layout effect on the basis of foil connecting seam more quickly polishing processing, while ensuring the stability of foil connecting seam and improving the smoothness of foil connection, the present application adopts a preferred technical scheme: the polishing structure 35 includes polishing motor 351, polishing disc 352. The polishing motor 351 is arranged on the connecting plate 37 through the support and located at the rear side of the laser welding machine 334; the polishing motor adopts a small servo motor which can drive the polishing disc to complete the polishing processing of the welding seam. The polishing disc 352 is arranged on the output shaft of the polishing motor 351, and the polishing disc 352 is composed of a disc 353 and a copper wire brush 354 arranged on the disc 353; the end face of the polishing disc 352 is protruded outward by 2-5mm compared with the welding nozzle of the laser welding machine 334. In the initial state, the welding nozzle of the laser welding machine is spaced apart from the surface of the foil, and the design standard requirement of the embodiment is 3mm. The end face of the polishing disc 352 is protruded outward by 2mm compared with the welding nozzle of the laser welding machine 334, so that the third hydraulic cylinder can move downward by 2.5mm after the welding process is completed, so as to realize the processing of the copper wire brush to the foil welding seam, and the use safety of the welding nozzle is not affected. The laser welding process can reduce the influence of heat affected zone on soft magnetic performance by accurately controlling heat input and parameter optimization. But polishing is still necessary to ensure that the surface smoothness meets the welding quality requirements. Therefore, when the laser welding machine completes the whole processing of the welding seam, i.e. after moving from back to front, the polishing motor starts to drive the polishing disc to rotate at high speed, and under the reciprocating movement of the top plate, the third hydraulic cylinder and the connecting plate, the high-efficiency polishing processing of the foil welding seam is completed.

[0030] As shown: Figure 7 In this embodiment, in order to realize the accurate positioning and fixing of the tail end of the last foil and the front end of the new changed foil, and to provide a strong foundation for subsequent efficient and accurate foil connection, the present application adopts a preferred technical scheme: the pressing structure 34 is symmetrically distributed on the left and right, specifically symmetrically distributed on the left and right about the guide rod. Each group of the pressing structure 34 includes a fourth hydraulic cylinder 341 and a pressing plate 342. The fourth hydraulic cylinder 341 is vertically arranged on the cross beam frame 332, and the bottom end is connected to the pressing plate 342, wherein the pressing plate 342 is made of hard rubber material. In this way, the safety protection on the basis of pressing and fixing the foil is realized. And a second infrared sensor 343 is arranged on the lower end face of the pressing plate 342, and the second infrared sensor 343 is in signal connection with the fourth hydraulic cylinder 341.

[0031] The working principle of the foil end fixing is as follows: the bottom plate is provided with mark lines distributed in front and back of the axis; for observation. In the single-foil continuous conveying operation state, the second infrared sensor can monitor the foil, that is, there is a monitoring signal, and the state record is "1", and the state record is "0" without monitoring signal. When the left second infrared sensor loses the monitoring signal of the foil, the second infrared sensor transmits a starting signal to the right fourth hydraulic cylinder, and the right fourth hydraulic cylinder is elongated, so that the pressing plate can drive the fixing operation of the end of the upper foil, and the subsequent motor and the like are not operated at this time. At this time, through the optimization design of signal transmission and control design and the action reaction time of the fourth hydraulic cylinder, it is ensured that the end of the upper foil is located at the mark line. Then the staff pulls the start of the roll-type foil ready for use and waiting for the material replacement to the mark line of the bottom plate, and the two ends are in contact. Then the PLC controller or industrial computer and the like are arranged to control the left fourth hydraulic cylinder to be elongated, so that the left foil end is pressed and fixed, thereby providing a strong foundation for the welding of the new and old foil ends. After the welding is completed, the two fourth hydraulic cylinders are reset to the initial height, and the like. The present application optimizes the space design structure, realizes the efficient operation of the foil material replacement-connection-polishing treatment, avoids the long-time interruption and low efficiency of the traditional foil replacement production, improves the optimization treatment mode of the foil welding place, and solves the problem of the thickness increase and uneven quality of the traditional foil welding joint, thereby solving the problem of the dry-type transformer winding defect.

[0032] As shown in Figure 1 and Figure 8 : in the embodiment, the tensioning mechanism 4 comprises a tensioning frame 41, a second roller 42, a third roller 43 and a fourth roller 44. The tensioning frame 41 is distributed left and right and connected with the left end of the second supporting frame 31. That is, the tensioning mechanism is located to the right of the second supporting frame. The second roller 42 is two groups of horizontally distributed rollers, and is rotatably arranged on the tensioning frame 41. Each group of second rollers 42 is two rollers distributed up and down; in this way, the power is provided to facilitate conveying. The third roller 43 is arranged between the two second rollers 42 and can move up and down; the fourth roller 44 is two rollers distributed up and down and located to the right of the right second roller 42. The right second roller 42 is provided with a double sprocket 46, and one end is also provided with a third motor 47; the left second roller 42 and the fourth roller 44 are each provided with a single sprocket 48, and the double sprocket 46 and the single sprocket 48 are connected through a chain 49. In this way, the third motor starts to drive the second roller and the fourth roller to rotate synchronously, thereby realizing the power output of the foil and improving the conveying efficiency of the foil.

[0033] As shown in Figure 9As shown: in order to solve the foil in the instant of roll change or welding, the tension will fluctuate, resulting in local tension structure tightness, prone to foil "collapse" or "warp" phenomenon in the conveying stage, the application adopts a preferred technical solution: the front and rear ends of the third roller 43 are provided with connecting columns 431, which are square structures in this embodiment. The third roller 43 is moved up and down by the second drive 45; wherein the second drive 45 includes an adjusting motor 451, an adjusting screw 452 and an auxiliary rod 453. The adjusting screw 452 is vertically arranged on the tensioning frame 41, and the auxiliary rod 453 is symmetrically arranged on both sides of the adjusting screw 452. The connecting column 431 is threadedly connected with the adjusting screw 452 and slidably connected with the auxiliary rod 453. The adjusting motor 451 is arranged on the tensioning frame 41 and connected with the adjusting screw 452. In this way, the adjusting motor is started in the forward direction to drive the adjusting screw to rotate synchronously. Due to the cooperation of the "screw nut structure", the adjusting screw drives the connecting column and the second roller to move upward as a whole. In the direction of foil conveying shown in the figure, the operation of increasing the tension force is completed. The specific tension control can be realized by cooperating with the pressure sensor to realize the specific tension control output adjustment. Conversely, the reverse rotation of the adjusting motor drives the connecting column and the second roller to move downward as a whole, that is, the operation of reducing the tension force is completed.

[0034] As Figure 10As shown: in this embodiment, in order to solve the problem of incomplete or untimely correction of the foil material for ultra-thin or ultra-thick foil material, which easily leads to deviation of the foil material during conveying, and cannot be wound neatly on the core of the transformer, resulting in a great reduction in the processing quality of the transformer, the present application adopts a preferred technical scheme: a correction structure 5 is further arranged between the tensioning frame 41 and the second supporting frame 31. The correction structure 5 comprises a correction frame 51, a correction plate 52, a third infrared sensor 53 and a third drive 54. The correction frame 51 is in a U-shaped structure and is fixedly installed at the right end of the second supporting frame 31; the correction frame is located between the second supporting frame and the tensioning frame. The correction plate 52 is composed of a first plate 521 and a second plate 522, and a connecting sleeve 523 is arranged on the first plate 521, and a connecting rod 524 is arranged on the second plate 522, and the connecting rod 524 and the connecting sleeve 523 are in a sleeved structure; the purpose of such arrangement is to facilitate opening and closing, facilitate the foil material to be put into, and provide a strong foundation for subsequent intelligent and automatic correction adjustment. The cross section of the connecting sleeve 523 is in a square structure; and the distance between the front and rear connecting sleeves 523 is equal to the width of the foil material. The third infrared sensor 53 is arranged on the tensioning frame 41 and is used for real-time monitoring of the front side of the foil material and performing correction operation through the third drive 54. When the third infrared sensor detects that the front side of the foil material is abnormally advanced (the deviation rectification includes the action of the foil material moving forward or backward), a trigger signal is transmitted to the third drive, so that the third drive can start to drive the correction plate to perform corresponding action adjustment, thereby always ensuring the accuracy of the foil material conveying.

[0035] As Figure 10As shown: in this embodiment, the third drive 54 includes a correction motor 541, a correction screw rod 542, and a correction guide rod 543. The correction screw rod 542 penetrates through the left side of the first plate 521 and is threadedly connected with the first plate 521. The correction guide rod 543 penetrates through the right side of the first plate 521 and is slidably connected with the first plate 521. The correction screw rod 542 and the correction guide rod 543 are both arranged in the correction frame 51 in an extending manner. The correction motor 541 is mounted on the correction frame 51 through a support and is connected with the correction screw rod 542. The correction motor is also a servo control motor, which is convenient for precise adjustment and control. In the initial state, the foil conveying is accurately guided, and the third infrared sensor does not detect an abnormal signal. When the ultra-thin or ultra-thick foil deviates during the conveying process, the third infrared sensor first detects the abnormality and triggers a start signal to the correction motor, and the correction motor is triggered to start. The specific action is: when the foil conveying deviates to the front side, the correction motor is triggered to start the forward rotation, which drives the correction screw rod to rotate clockwise, and then drives the correction plate and the foil to move backward by a preset distance for the intelligent adjustment operation of correction under the auxiliary limiting cooperation of the correction guide rod. The signal control principle of the sensor and the motor of the present application can be realized by setting a PLC controller or an industrial computer. The specific working principle and circuit diagram are known to those skilled in the art, and this part mainly protects the mechanical structure of the high-efficiency foil conveying, so it is not repeated here.

[0036] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A foil material changing and conveying device for a foil winding machine, characterized in that: The conveying device includes a first support frame, a feeding mechanism, a connecting mechanism, and a tensioning mechanism. The first support frame is distributed left and right. The feeding mechanism includes a drive roller, a driven roller, a first motor, and a conveyor belt. The drive roller and driven roller are rotatably mounted on the right and left sides of the first support frame, respectively. The first motor is fixedly mounted on the first support frame via a bracket and connected to the drive roller. The conveyor belt is positioned between the drive roller and the driven roller, and multiple evenly distributed support seats are also provided on the conveyor belt. A fixed frame is also provided on the right side of the first support frame, and a load-bearing structure is provided on the fixed frame to drive the foil material to rotate and convey it. The connecting mechanism includes a second support frame, a first roller, and a second motor. The second support frame is vertically distributed and connected to the first support frame. There are two first rollers distributed vertically and rotatably mounted on the second support frame. The second motor is mounted on the second support frame and connected to one of the first rollers. A connector is also provided on the second support frame, located to the right of the first roller, to complete the welding and polishing of the ends of adjacent rolls of foil. The tensioning mechanism includes a tensioning frame, a second roller, a third roller, and a fourth roller. The tensioning frame is distributed horizontally and connected to the second support frame. The second rollers are in two sets horizontally distributed horizontally and rotatably mounted on the tensioning frame, with each set consisting of two rollers distributed vertically. The third roller is positioned between the two second rollers and can move vertically. The fourth roller consists of two rollers that are close to each other and distributed vertically, located to the right of the right second roller. A double sprocket is provided on the right second roller, with a third motor at one end. Single sprockets are provided on both the left second and fourth rollers, and the double sprockets and single sprockets are driven by a chain.

2. The foil material changing and conveying device for a foil winding machine as described in claim 1, characterized in that: The load-bearing structure includes a first hydraulic cylinder, a telescopic rod, a lifting plate, a second hydraulic cylinder, and a mounting base; the first hydraulic cylinder is distributed front to back, with one end connected and fixed to the fixed frame and the other end connected to the lifting plate; one end of the telescopic rod is welded and fixed to the fixed frame and the other end is welded and fixed to the lifting plate; the second hydraulic cylinder is vertically distributed, with one end connected to the lifting plate and the other end connected and fixed to the mounting base.

3. The foil material changing and conveying device for a foil winding machine as described in claim 2, characterized in that: The mounting base is also provided with a rotating component, which includes a rotating motor and a retaining sleeve. The rotating motor is fixedly mounted on the mounting base by a bracket, the retaining sleeve is disposed on the output shaft of the rotating motor, and a fastening post is threadedly connected inside the retaining sleeve. The fastening post has a fastening groove inside, and the cross-section of the fastening groove is a trapezoidal structure that is wider on the outside and narrower on the inside.

4. The foil material changing and conveying device for a foil winding machine as described in claim 3, characterized in that: The support base consists of three sets that are symmetrically arranged front and back and evenly spaced. The support base is also provided with a slot, which is a U-shaped structure that is adapted to the central shaft structure of the rolled foil. A first infrared sensor is also provided on one side of the first support frame and at the position corresponding to the rotating motor, and the first infrared sensor is connected to the first motor.

5. The foil material changing and conveying device for a foil winding machine as described in claim 4, characterized in that: The connecting components include a base plate, a crossbeam frame, a clamping structure, a third hydraulic cylinder, a laser welding machine, and a grinding structure. The base plate is mounted on the second support frame and located to the right of the first roller, with its upper surface flush with the horizontal plane of the central axis of the two vertically distributed first rollers. The crossbeam frame is U-shaped and mounted on the second support frame, directly above the base plate. The clamping structure is used to fix the ends of two adjacent rolls of foil. The third hydraulic cylinder is vertically distributed, with its top end mounted on the crossbeam frame via a top plate, and the other end mounted on the laser welding machine via a connecting plate. The top plate moves back and forth via a first drive. The first drive includes a moving motor, a guide rod, and a threaded rod. The guide rod and the threaded rod extend back and forth on the crossbeam frame, with the guide rod located above the threaded rod. The top plate maintains a threaded rotational connection with the threaded rod and a sliding connection with the guide rod. The moving motor is fixedly mounted on the crossbeam frame via a bracket and connected to the threaded rod. The grinding structure is used to grind the welded foil seams.

6. The foil material changing and conveying device for a foil winding machine as described in claim 5, characterized in that: The clamping structure consists of two symmetrically distributed sets. Each set of the clamping structure includes a fourth hydraulic cylinder and a pressure plate. The fourth hydraulic cylinder is vertically distributed on the crossbeam frame and its bottom end is connected to the pressure plate, which is made of hard rubber material. A second infrared sensor is also provided on the lower end face of the pressure plate, and the second infrared sensor is connected to the fourth hydraulic cylinder.

7. The foil material changing and conveying device for a foil winding machine as described in claim 6, characterized in that: The grinding structure includes a grinding motor and a grinding disc; the grinding motor is mounted on the connecting plate via a bracket and is located on the rear side of the laser welding machine; the grinding disc is mounted on the output shaft of the grinding motor and consists of a disc and a copper wire brush mounted on the disc; the end face of the grinding disc protrudes 2-5mm beyond the welding nozzle of the laser welding machine.

8. The foil material changing and conveying device for a foil winding machine as described in claim 1, characterized in that: The third roller is equipped with connecting posts at both its front and rear ends, and the third roller moves up and down through a second drive. The second drive includes an adjusting motor, an adjusting screw, and auxiliary rods. The adjusting screw is vertically distributed on the tensioning frame, and the auxiliary rods are two symmetrically distributed rods on the left and right sides of the tensioning frame, located on both sides of the adjusting screw. The connecting posts are threadedly connected to the adjusting screw and slidably connected to the auxiliary rods. The adjusting motor is located on the tensioning frame and connected to the adjusting screw.

9. The foil material changing and conveying device for a foil winding machine as described in claim 8, characterized in that: A correction structure is also provided between the tensioning frame and the second support frame; the correction structure includes a correction frame, a correction plate, a third infrared sensor, and a third drive; the correction frame has a U-shaped structure and is fixedly installed at the right end of the second support frame; the correction plate consists of a first plate and a second plate, with a connecting sleeve on the first plate and a connecting rod on the second plate, the connecting rod and the connecting sleeve maintaining a sleeved structure; the cross-section of the connecting sleeve is a square structure; and the distance between the front and rear connecting sleeves is equal to the width of the foil; the third infrared sensor is installed on the tensioning frame to monitor the front edge of the foil in real time and perform correction operations through the third drive.

10. The foil material changing and conveying device for a foil winding machine as described in claim 9, characterized in that: The third drive includes a straightening motor, a straightening screw, and a straightening guide rod; the straightening screw passes through the left side of the first plate and the two are threadedly connected; the straightening guide rod passes through the right side of the first plate and the two are slidably connected; the straightening screw and the straightening guide rod are both arranged in the straightening frame extending back and forth; the straightening motor is mounted on the straightening frame through a bracket and is connected to the straightening screw.

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