CN114360888A - Automatic lamination method of transformer core - Google Patents
Automatic lamination method of transformer core Download PDFInfo
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- CN114360888A CN114360888A CN202210056033.2A CN202210056033A CN114360888A CN 114360888 A CN114360888 A CN 114360888A CN 202210056033 A CN202210056033 A CN 202210056033A CN 114360888 A CN114360888 A CN 114360888A
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- 238000003475 lamination Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000004080 punching Methods 0.000 claims abstract description 169
- 238000010030 laminating Methods 0.000 claims abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 32
- 230000008569 process Effects 0.000 abstract description 8
- 239000013072 incoming material Substances 0.000 abstract description 6
- 238000003825 pressing Methods 0.000 description 17
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 229910000976 Electrical steel Inorganic materials 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000001788 irregular Effects 0.000 description 5
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- 238000009434 installation Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- PMVSDNDAUGGCCE-TYYBGVCCSA-L Ferrous fumarate Chemical group [Fe+2].[O-]C(=O)\C=C\C([O-])=O PMVSDNDAUGGCCE-TYYBGVCCSA-L 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 230000005291 magnetic effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
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Abstract
The invention provides an automatic lamination method of a transformer iron core, which is used for laminating iron cores in a shape like a Chinese character 'ri' or a Chinese character 'kou', and the like by adopting a method of laminating the iron cores one by one and then splicing the iron cores; simulating manual lamination, firstly adjusting the width direction of the punching sheet, and positioning by adopting a guide piece in the adjusting process; then positioning the length direction; the requirement on the regularity of the incoming material punching sheet is low, manual participation is not needed in the whole process, the efficiency is high, the labor cost is low, experience is not needed, the quality is easier to ensure than that of manual lamination, and the labor intensity of operators is greatly reduced.
Description
Technical Field
The invention relates to the technical field of transformers, in particular to an automatic lamination method of a transformer core.
Background
The iron core is the main magnetic circuit part in the transformer and is generally formed by stacking hot-rolled or cold-rolled silicon steel sheets with high silicon content and insulating paint coated on the surfaces. The iron core and the coil wound on the iron core form a complete electromagnetic induction system. The transformer core is generally made of cold rolled silicon steel sheets (stamped sheets), which are cut into long sheets according to the required size of the core, and then are overlapped into a shape like a Chinese character ri, a shape like a Chinese character kou, an shape like an E, and the like. According to the electrical requirements, the punching sheets of the same iron core are different in specification, but are different in length and consistent in width, and the length difference between every two adjacent punching sheets is equal.
Six thousand silicon steel sheets are stacked according to a certain sequence rule in the whole iron core, the stacking and aligning of the silicon steel sheets are manually kept in the stacking process by experience and visual observation, a stacking worker has to keep high attention, the quality of the iron core stacked by different workers is different, the product has a certain proportion of reject ratio, the efficiency is low, the consumed time is long, and the working strength is high.
The device comprises a mechanical arm, a measuring table, a stacking table and a control system, wherein one end of the mechanical arm is rotatably arranged on the ground, and the other end of the mechanical arm is rotatably connected with the mechanical arm. The arm can rotate the measuring station top, can also rotate the closed assembly bench top, and wherein equal signal connection of arm and manipulator is in control system. The device has the advantages of relatively simple structure, small occupied area, high precision and quality of the manufactured transformer finished product, labor cost and labor intensity reduction and production efficiency improvement. Also provides an efficient automatic lamination method for the silicon steel sheet iron core of the power transformer, which can take the silicon steel sheets with adhesion from the sheet stack or the table top of the measuring table during sheet taking
The core is separated into single pieces, so that the core can be stacked into a transformer core meeting the requirements of high precision and high quality. According to the technical scheme, the iron chips are spliced into the shape of the Chinese character 'ri', and then the laminated iron chips are stacked up layer by layer in the shape of the Chinese character 'ri', so that the efficiency is low due to the fact that the iron chips are spliced into the shape of the Chinese character 'ri'. According to the method, the iron core sheets are spliced into the shape of the Chinese character 'ri' and then stacked layer by layer, the requirement on the uniformity of supplied materials of the iron core sheets is high due to the fact that the iron core sheets are spliced into the shape of the Chinese character 'ri', the iron core sheets are processed by a punch press or a cutting machine and are thin, the width and the length directions of the iron core sheets (punched sheets) which are obtained from the punch press or the cutting machine are irregular, and the technical scheme is difficult to achieve. Although a vision system can be additionally arranged and supplied materials are regulated through automatic control, on one hand, the efficiency is reduced by additionally arranging the vision system, on the other hand, the iron chip is very thin and usually only has a few tenths of millimeters, and for example, a 110KVA large transformer is taken as an example, the thickness of the iron chip is 0.27mm and is very thin; the iron core piece of transformer is according to the electrical requirement, and the size changes, and the iron core piece adds man-hour on the punch press cutting bed, has placed from supreme down as required, and the iron core piece is too thin, and the size differs, and visual system is difficult to discern to in case visual system takes place the discernment mistake, will influence the piling up of follow-up iron core piece.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an automatic lamination method of a transformer iron core, which has high efficiency and low requirement on punching sheet uniformity, aiming at the defects, the method adopts a method of laminating iron cores in a shape like a Chinese character 'ri' or a Chinese character 'kou', and the like, one iron core is laminated layer by layer and then spliced; simulating manual lamination, firstly adjusting the width direction of the punching sheet, and positioning by adopting a guide piece in the adjusting process; then positioning the length direction; the requirement on the regularity of the incoming material punching sheet is low, manual participation is not needed in the whole process, the efficiency is high, the labor cost is low, experience is not needed, the quality is easier to ensure than that of manual lamination, and the labor intensity of operators is greatly reduced.
The above object of the present invention is achieved by the following technical solutions:
an automatic lamination method for a transformer core comprises the following steps:
the first step is as follows: the punching sheet tray, the feeding device and the fine positioning device are sequentially arranged, and the guiding pieces are arranged on the feeding device and the fine positioning device, so that the punching sheet does not displace in the width direction when passing through the feeding device and the fine positioning device;
the second step is that: feeding, namely placing the stamped sheets on a stamped sheet tray;
the third step: the sheet suction device sucks up the punching sheet;
the fourth step: roughly positioning, namely righting the sucked punching sheet, and adjusting the width direction of the punching sheet to enable the length direction of the punching sheet to be parallel to the feeding direction;
the fifth step: the punching sheet is fed into the feeding device by the sheet suction device, the feeding device drives the punching sheet to move forwards, and the punching sheet enters the fine positioning device;
and a sixth step: a groove is formed below the fine positioning device, a positioning pin is fixed in the groove, and the fine positioning device limits the length direction of the stamped piece to enable a small hole in the stamped piece to be aligned with the positioning pin in the groove;
the seventh step: stacking, opening the fine positioning device, allowing the punching sheet to fall down, and allowing a positioning hole in the punching sheet to penetrate into a positioning pin of the groove; punching sheets with different specifications sequentially fall into the grooves;
eighth step: and grabbing, magnetically sucking the lamination by a mechanical arm, and placing the lamination in a lamination placing area.
The method disclosed by the invention is characterized in that the punching sheets are firstly laminated layer by layer and then spliced into a shape like a Chinese character 'ri', 'kou', 'E' and the like, namely, the punching sheets are laminated layer by layer and then spliced. The method comprises the steps of sucking punched sheets one by one, and feeding the punched sheets into a feeding device, wherein the punched sheets are sucked by a sucking disc device preferably; the punching sheet tray, the feeding device and the fine positioning device are sequentially arranged, and like a printer, punching sheets are conveyed one by one, so that the efficiency is high, and the positioning is accurate. During lamination, punching sheets with different specifications are sequentially overlapped upwards, preferably five punching sheets are selected as a group, the punching sheets in the group are generally overlapped from large to small or from small to large, and a mechanical arm is sucked and placed in a lamination placing area after every five punching sheets are overlapped. The method of the invention comprises the steps that a sheet suction device sucks a sheet of punched sheet, the width direction of the punched sheet is adjusted, and a guide piece is arranged, so that the punched sheet does not displace in the width direction in the movement process. After the punching sheet reaches the fine positioning device, limiting the length direction; and positioning pins are arranged in the grooves, so that the positioning holes on the punching sheets are aligned with the positioning pins. After alignment, the fine positioning device is opened, and the punching sheet falls into the groove.
And further, in the third step, the punching sheet tray rises, and the sheet suction device sucks one punching sheet.
After the punching sheet tray rises, the sheet suction device sucks the suction sheet again, so that the movement path of the sucked punching sheet is reduced, and the suction stability is ensured.
And further, in the third step, the sheet suction device sucks one end of the stamped sheet, one end of the stamped sheet is sent into the feeding device, and the feeding device drives the stamped sheet to move forwards.
Further, the fourth step, aligning the sucked punching sheet means that: the two sides of the punching sheet are provided with the guide pieces, and the punching sheet is drawn close to the middle by the guide pieces, so that the central line of the punching sheet in the length direction coincides with the straight line.
And furthermore, a fifth step and a sixth step of applying pressure to the punching sheet in the sheet feeding and fine positioning processes.
And further, in the fifth step, the distance between the feeding device and the fine positioning device is smaller than the length of the punched sheet, so that the punched sheet is conveyed by the feeding device to enter the fine positioning device.
Further, in the sixth step, the length direction of the punching sheet is adjusted by the fine positioning device, which means that: a limiting block is arranged at one end of the fine positioning device, the five punching sheets are stacked from long to short, and the distance of the limiting block moving forwards is the difference of the lengths of the two punching sheets when one punching sheet is stacked.
And further, in the seventh step, the positioning pin consists of a conical part and a cylindrical part, and the cone vertex angle of the conical part is smaller than 20 degrees, so that the punching sheet can fall smoothly. Even after the punching sheet is roughly positioned and finely positioned, deviation is possible to exist, if the positioning pin is in a round table shape, the positioning hole cannot be sleeved in the positioning pin due to the deviation, so that the upward end part of the positioning pin needs to be reduced as much as possible, and the punching sheet with the deviation falls into the positioning pin; aiming at the actual working condition with deviation, the upper part of the positioning pin is conical. On the other hand, because the punching sheet is very thin and light, if the inclination of the conical part of the positioning pin is too large, even if the positioning hole of the punching sheet can be smoothly inserted into the positioning pin, the punching sheet can be clamped and cannot fall to the bottommost surface because the inclination of the positioning pin is too large, therefore, the conical inclination is as small as possible under the condition of ensuring the strength of the positioning pin, and the conical vertex angle of the conical part of the positioning pin is less than 20 degrees.
And further, before feeding, the punching sheets are manually arranged to align the width directions of the punching sheets as much as possible.
The width and the length direction of the iron core sheets (punched sheets) obtained from the punching machine or the cutting machine are irregular, and if the incoming material regularity is too poor, the punched sheets placed on the punched sheet tray can be manually arranged in advance.
The invention has the following beneficial effects:
according to the automatic lamination method for the transformer core, the lamination is carried out by adopting a method of laminating one sheet by one sheet and then splicing the sheets, so that the efficiency is high, and the requirement on the uniformity of incoming materials is low. Specifically, after the sheet suction device sucks one sheet of punching sheet, the width direction of the punching sheet is adjusted firstly because the punching sheet obtained from the cutting machine of the punching machine is irregular; the adjusted punching sheet is sent into a feeding device, and the feeding device sends the punching sheet into a fine positioning device. In order to realize stacking, a groove is arranged in the fine positioning device, a positioning pin matched with the punching positioning hole is fixed in the groove, and the fine positioning device limits the length direction of the punching so that a small hole on the punching aligns with the positioning pin in the groove. The automatic adjustment and positioning in the width and length directions of the punching sheet are realized. By analogy, the subsequent punching sheets also enter the groove according to the step, and the neat and efficient lamination is completed; the punching sheets entering the groove are sucked and placed in the lamination placing area by the mechanical arm, the mechanical arm adopts electromagnetic iron to suck, and the quantity of the punching sheets sucked at one time can be set by a control system. Compared with the prior art, the punching device is high in efficiency, simple in structure, low in requirement on the regularity of incoming materials and adaptable to punching sheets of various specifications.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of an automatic lamination system of a transformer core (a manipulator is sucking laminations).
Fig. 2 is a schematic structural diagram of a punching tray, a sheet suction device and a feeding device (punching suction).
Fig. 3 is a schematic structural diagram of a punching sheet tray, a sheet suction device and a feeding device (punching sheets enter the feeding device).
Fig. 4 is a schematic structural diagram of the fine positioning device.
FIG. 5 is a diagram of the relationship between the trapezoidal punching sheet and the limiting block.
Fig. 6 is a diagram of the position relationship between the hexagonal punching sheet and the limiting block.
Fig. 7 is a schematic view of a locating pin structure.
Punching sheet-1, trapezoidal punching sheet-11, hexagonal punching sheet-12, guide member two-2, driving member three-3, positioning hole-4, punching sheet tray-100, sheet sucking device-200, sucking disc-201, guide member one-202, driving member two-203, bracket one 204, feeding device-300, pinch roller one-301, upper roller-302, lower roller-303, driving member five-304, shaft-305, suspension bracket-306, bracket two-307, guide rod-308, guide member three-309, fine positioning device-400, groove-401, positioning pin-402, positioning block-403, driving member six-404, limiting block-405, mounting plate-4051, limiting plate-4052, driving member seven-406 and driving wheel-407, two pressing wheels-408, a lamination placing area-500, a mechanical arm-600 and a workbench-700.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
Example 1
An automatic lamination system for transformer cores is shown in fig. 1 and comprises a punching tray 100, a sheet suction device 200, a feeding device 300, a fine positioning device 400, a lamination placing area 500 and a manipulator 600; the punching sheet tray 100, the feeding device 300 and the fine positioning device 400 are sequentially arranged, and the manipulator 600 is placed between the fine positioning device 400 and the lamination placing area 500; the sheet suction device 200 can move back and forth towards the direction of the feeding device 300, and the distance between the feeding device 300 and the fine positioning device 400 is smaller than the length of the punching sheet 1; the punching sheet 1 is sucked by the sheet sucking device 200 and conveyed by the feeding device 300 to the fine positioning device 400; the fine positioning device 400 laminates the stamped steel 1, and the manipulator 600 sucks and places the laminates in the laminate placement area 500, so that the automatic lamination of the transformer core is realized.
As shown in fig. 1, the punching sheet tray 100, the sheet suction device 200, the feeding device 300, and the fine positioning device 400 are all mounted on a worktable 700.
The punched piece 1 is placed in the punched piece tray 100, and as shown in fig. 2, the placing direction of the punched piece 1 is the direction that the length faces the feeding direction. The first driving part is connected below the punching tray 100 and drives the punching tray 100 to move up and down, and after the punching tray 100 moves up, the sheet suction device 200 sucks one punching sheet 1 from the punching tray 100. As shown in fig. 2, the punching sheet tray 100 and the first driving member are disposed at a lower portion of the worktable, and the sheet suction device 200 is disposed above the worktable 700.
The sheet suction device 200 is provided with a sucker 201 and a coarse positioning device, the coarse positioning device comprises two first guide pieces 202 and two second driving pieces 203, and the two first guide pieces 202 are respectively arranged on two sides of the sucker 201; when the punching sheet 1 is sucked by the sucking disc 201, the driving piece two 203 respectively drives the two guiding pieces one 202 to simultaneously approach to the middle, so that the punching sheet 1 is righted, and the width direction of the punching sheet 1 is adjusted.
The sheet suction device 200 further comprises a first support 204, as shown in fig. 3, the first support 204 is erected on the sheet punching tray 100, and the first support 204 can move back and forth along the feeding direction, as shown by the arrow in fig. 3. The sheet suction device 200 sucks and feeds the punched sheet 1 into the feeding device 300.
As shown in fig. 2, the first guiding element 202 is a roller, a gap is formed in the middle of the roller, after the sheet absorbing device 200 absorbs the sheet 1, the rollers on both sides are close to the middle, the sheet 1 is located in the gap of the roller, on one hand, the roller adjusts the width direction of the sheet 1, and on the other hand, after one end of the sheet 1 is fed into the feeding device 300, the roller also guides the forward movement of the sheet 1.
Two sides of the punching sheet tray 100 are also respectively provided with at least one pair of second guiding pieces 2, the second guiding pieces 2 are driven by a third driving piece 3, when the punching sheet 1 is sucked, the second guiding pieces 2 are higher than the punching sheet tray 100, so that when the punching sheet 1 is sucked by the sucking disc 201, the third driving piece 3 drives the second guiding pieces 2 to approach the punching sheet 1, and the punching sheet 1 is straightened. The width and the length direction of the punched sheet obtained from the punching machine or the cutting machine are irregular, if the regularity of the punched sheet is poor, the width direction of the punched sheet is not adjusted enough only by the first guide part 202, and the punched sheet has the risk of falling, so that the second guide part 2 is further arranged, after the punched sheet 1 is sucked up, the width direction of the punched sheet 1 is adjusted together with the first guide part 202, and the punched sheet 1 is adjusted. As shown in fig. 2, the driving element three 3 is a cylinder, the guiding element two 2 is a barrier strip arranged at the output end of the cylinder, and the barrier strip acts on the punching sheet 1. In fig. 2 of this embodiment, only one pair of the second guide members 2 and the third driving members 3 thereof are provided, and more pairs of the second guide members 2 and the third driving members 3 may be provided according to the regularity of the supplied materials, and the more the supplied materials are irregular, the more the second guide members 2 and the third driving members 3 are provided.
The feeding device 300 comprises a roller device and a first pressing wheel 301, the roller device comprises an upper roller 302 and a lower roller 303, the stamped steel 1 is positioned between the upper roller 302 and the lower roller 303, and the upper roller 302 and the lower roller 303 are driven by a driving piece IV to enable the stamped steel 1 to move forwards and enter the fine positioning device 400; the first pressing wheel 301 is positioned between the roller device and the sheet suction device 200, the first pressing wheel 301 is driven by the fifth driving part 304, and the fifth driving part 304 drives the first pressing wheel 301 to move up and down.
Towards piece 1 longer, set up pinch roller 301 and compress tightly towards piece 1, make to carry more reliably towards piece 1 after coming in, prevent towards piece 1 transportation in buckling deformation. The driving member five 304 can be an air cylinder and a spring, so that the friction force is more uniform during conveying, and the driving member five 304 of the embodiment is the air cylinder. As shown in fig. 3, the first pressing wheels 301 are respectively disposed at two ends of a shaft 305, and when the punching sheet 1 passes through the first pressing wheels 301, the first pressing wheels 301 move downwards, and the first pressing wheels 301 are driven to rotate. As shown in fig. 3, a shaft 305 is mounted on a suspension 306, the suspension 306 is connected with an output end of an air cylinder, a second bracket 307 is erected on two sides of the punch 1, a fifth driving member 304 is mounted at the top end of the second bracket 307, a guide rod 308 is vertically mounted on the suspension 306, the guide rod 308 penetrates through the second bracket 307, and the air cylinder drives the first pressing wheel 301 to move up and down along the guide rod 308.
Two guide pieces III 309 are also arranged between the roller device and the first pressing wheel 301; the punching sheet 1 passes through the space between the two third guide pieces 309, and the third guide pieces 309 play a role in guiding. As shown in fig. 3, the third guide 309 is also a roller as the first guide 202, the punch 1 passes through the first pressing wheel 301 and enters the roller device, and the third guide 309 prevents the punch 1 from laterally displacing to play a guiding role.
As shown in fig. 4, the fine positioning device 400 includes a positioning tool, a material blocking device and a groove 401, the groove 401 is located below the positioning tool, and a positioning pin 402 adapted to the positioning hole 4 of the punch sheet 1 is fixed in the groove 401; the positioning tool comprises two positioning blocks 403, a transmission mechanism and a driving piece six 404 which are oppositely arranged, wherein the two positioning blocks 403 are respectively connected with the driving piece six 404, and the driving piece six 404 drives the two positioning blocks 403 to be opened or closed relatively; the two positioning blocks 403 are respectively provided with a conveying mechanism, and the conveying mechanism drives the punching sheet 1 to move forwards; the material blocking device comprises a limiting block 405 and a driving piece seven 406, the driving piece seven 406 drives the limiting block 405 to move back and forth to limit the punching sheets 1 with different specifications, so that small holes in the punching sheets 1 are aligned with the positioning pins 402 in the grooves 401; after the six driving pieces 404 drive the two-piece positioning block 403 to be opened, the punching piece 1 falls into the groove 401.
The conveying mechanism comprises a driving wheel 407, a second pressing wheel 408 and an eighth driving piece, the driving wheel 407 is uniformly distributed along the moving direction of the punching sheet 1, and the eighth driving piece drives the driving wheel 407 to rotate; punch 1 is located between drive wheel 407 and pinch roller two 408. As shown in fig. 4, the driving wheels 407 and the pressing wheels 408 are uniformly distributed on the positioning block 403, and the driving wheels 407 and the pressing wheels 408 are arranged along the feeding direction of the punching sheet.
The limiting block 405 comprises an installation plate 4051 and a limiting plate 4052, the installation plate 4051 is connected with the driving piece eight 409, and the driving piece eight 409 drives the installation plate 4051 to move linearly and to approach or leave the punching sheet 1; the limiting plate 4052 is in contact with the punching sheet 1; the limiting plate 4052 comprises a cross rod and vertical rods perpendicular to the cross rod, the cross rod and the vertical rods are both parallel to the mounting plate 4051, at least two vertical rods are provided, the thickness of each vertical rod is larger than that of the punching sheet 1, in the embodiment, three vertical rods are provided, the limiting plate is in a reverse 3 shape, the vertical rods are vertically provided with rod pieces, and the height of each rod piece is larger than that of the punching sheet 1 (the thickness of each vertical rod is larger than that of the punching sheet due to the arrangement of the rod pieces); the limiting plate 4052 is detachably connected with the mounting plate 4051; when the punching sheet 1 is trapezoidal, the limiting plate 4052 is adjusted to enable the cross bar to be parallel to the end inclined plane of the trapezoidal punching sheet 11, as shown in fig. 5; when the punching sheet 1 is hexagonal, the limiting plate 4052 is adjusted, so that the end of the hexagonal punching sheet 12 is located between two vertical rods, as shown in fig. 6. As shown in fig. 2, the punching sheet 1 in this embodiment is trapezoidal, and the cross bar is parallel to the end inclined plane of the trapezoidal punching sheet 11.
As shown in fig. 7, the positioning pin 402 is composed of a conical portion and a cylindrical portion, and the cone vertex angle α of the conical portion is smaller than 20 ° so that the punch 1 falls smoothly.
As shown in fig. 4, the driving member six 404 is an air cylinder, the air cylinder is mounted on the worktable 700, and an output end of the air cylinder is connected with the positioning block 403; the worktable 700 is vertically provided with a limit position, and the positioning block 403 is provided with a guide groove matched with the limit rod.
As shown in fig. 1, the lamination placing area 500 is provided with positioning pins 402 as in the grooves 401, the mechanical arm 600 magnetically attracts five punching sheets 1 to be placed in the lamination placing area 500, and the positioning holes 4 on the punching sheets 1 penetrate into the positioning pins 402. The positioning pin 402 is needle-shaped, so that the punching sheet 1 can be conveniently and smoothly inserted. The robot 600 is equipped with an electromagnetic ferromagnetic suction lamination.
Automatic lamination has been realized to this embodiment, and lamination degree of automation is higher, by control system control, and production efficiency is high, and easy operation is convenient, easy to maintain maintenance, and the quality obtains guaranteeing more easily than artifical lamination, has alleviateed operation workman's intensity of labour greatly. The punching sheet can be compatible with punching sheets of various models, automatic switching can be realized for the punching sheets of different models, and only parameters need to be set. The requirement on the regularity of the incoming material punching sheet is low, and manual participation is not needed in the whole process.
Example 2
An automatic lamination method for a transformer core is characterized in that the automatic lamination system for the transformer core described in embodiment 1 is used for lamination, in this embodiment, five punching sheets are stacked one on another, after the five punching sheets are stacked, a mechanical arm 600 sucks away the stacked punching sheet and places the stacked punching sheet in a lamination placing area 500, taking five punching sheets from large to small as an example for lamination, and the method comprises the following steps:
the first step is as follows: the punching sheet tray 100, the feeding device 300 and the fine positioning device 400 are sequentially arranged, and the feeding device 300 and the fine positioning device 400 are provided with guide pieces, so that the punching sheet 1 does not displace in the width direction when passing through the feeding device 300 and the fine positioning device 400;
the second step is that: feeding, namely placing the stamped steel 1 on a stamped steel tray 100;
the third step: a sheet is sucked, the first driving piece drives the punching sheet tray 100 to ascend, and the sheet sucking device 200 sucks one end of one punching sheet 1 as shown in fig. 2;
the fourth step: roughly positioning, namely righting the sucked punching sheet 1, and adjusting the width direction of the punching sheet 1 by using a first guide part 202 and a second guide part 2 to enable the length direction of the punching sheet 1 to be parallel to the feeding direction, wherein the direction shown by an arrow in fig. 3 is the feeding direction; until the punch 1 leaves, the first guide 202 and the second guide 2 are not opened towards the two sides.
The fifth step: feeding, as shown in fig. 3, the sheet suction device 200 feeds the stamped sheet 1 into the feeding device 300, the stamped sheet 1 enters the roller device through the third guide part 309, and the fifth driving part 304 drives the first pressing wheel 301 to move downwards to press the stamped sheet 1; the feeding device 300 drives the punching sheet 1 to move forwards, and the punching sheet 1 enters the fine positioning device 400;
and a sixth step: a groove 401 is formed below the fine positioning device 400, as shown in fig. 4, a positioning pin 402 is fixed in the groove 401, and a seventh driving element 406 drives a limiting block 405 to advance to limit the length direction of the punching sheet 1, so that a small hole on the punching sheet 1 is aligned with the positioning pin 402 in the groove 401; when the next punching sheet 1 enters the fine positioning device 400, the limiting block 405 moves forward again, and the moving distance is the difference between the lengths of the two adjacent punching sheets 1.
The seventh step: stacking, namely opening the fine positioning device 400, enabling the stamped steel 1 to fall down, and enabling a positioning hole 4 in the stamped steel 1 to penetrate into a positioning pin 402 of the groove 401; the punching sheets 1 with different specifications sequentially fall into the groove 401;
eighth step: grabbing, magnetically attracting the lamination formed by the five punching sheets 1 by the manipulator 600, and placing the lamination in the lamination placing area 500.
It is known from trial and error that the efficiency of this embodiment is as follows: suction + feeding 2S, and fine positioning 1S, i.e. 15S/5pcs, i.e. the time for stacking 5 punching sheets 1 in the automatic lamination system for transformer cores of the present embodiment is 15S (and suction and fine positioning can be performed simultaneously, and actually less than 15S is still needed during continuous lamination). Under the condition that the time of each group of laminations (5 laminations 1) is 15 seconds, the laminations with the thickness of 0.27mm can be stacked by 700mm after 12.2 hours.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. An automatic lamination method for a transformer core is characterized by comprising the following steps:
the first step is as follows: the punching sheet tray, the feeding device and the fine positioning device are sequentially arranged, and the guiding pieces are arranged on the feeding device and the fine positioning device, so that the punching sheet does not displace in the width direction when passing through the feeding device and the fine positioning device;
the second step is that: feeding, namely placing the stamped sheets on a stamped sheet tray;
the third step: the sheet suction device sucks up the punching sheet;
the fourth step: roughly positioning, namely righting the sucked punching sheet, and adjusting the width direction of the punching sheet to enable the length direction of the punching sheet to be parallel to the feeding direction;
the fifth step: the punching sheet is fed into the feeding device by the sheet suction device, the feeding device drives the punching sheet to move forwards, and the punching sheet enters the fine positioning device;
and a sixth step: a groove is formed below the fine positioning device, a positioning pin is fixed in the groove, and the fine positioning device limits the length direction of the stamped piece to enable a small hole in the stamped piece to be aligned with the positioning pin in the groove;
the seventh step: stacking, opening the fine positioning device, allowing the punching sheet to fall down, and allowing a positioning hole in the punching sheet to penetrate into a positioning pin of the groove; punching sheets with different specifications sequentially fall into the grooves;
eighth step: and grabbing, magnetically sucking the lamination by a mechanical arm, and placing the lamination in a lamination placing area.
2. The method for automatically laminating the transformer core according to claim 1, wherein in the third step, the punching tray is raised, and the sheet sucking device sucks one punching sheet.
3. The method of automatically laminating a transformer core according to claim 1, wherein the sheet suction means employs pneumatic suction punching.
4. The method for automatically laminating the transformer core according to claim 1, wherein in the third step, the sheet suction device sucks one end of the punched sheet, and feeds one end of the punched sheet into the feeding device, and the feeding device drives the punched sheet to move forwards.
5. The automatic lamination method of the transformer core according to claim 1, wherein the fourth step of aligning the sucked punching sheets is that: the two sides of the punching sheet are provided with the guide pieces, and the punching sheet is drawn close to the middle by the guide pieces, so that the central line of the punching sheet in the length direction coincides with the straight line.
6. The method for automatically laminating a transformer core according to claim 1, wherein the fifth step and the sixth step apply pressure to the lamination during the feeding and fine positioning.
7. The method for automatically laminating the transformer core according to claim 1, wherein in the fifth step, the distance between the feeding device and the fine positioning device is less than the length of the punched piece, so that the punched piece is conveyed into the fine positioning device through the feeding device.
8. The automatic lamination method of the transformer core according to claim 1, wherein in the sixth step, the fine positioning device adjusts the length direction of the stamped sheets by: a limiting block is arranged at one end of the fine positioning device, the five punching sheets are stacked from long to short, and the distance of the limiting block moving forwards is the difference of the lengths of the two punching sheets when one punching sheet is stacked.
9. The method for automatically laminating a transformer core according to claim 1, wherein in the seventh step, the positioning pins are composed of a conical portion and a cylindrical portion, and the apex angle of the conical portion is less than 20 ° so that the punched pieces fall smoothly.
10. The automatic lamination method of the transformer core according to claim 1, wherein in the second step, before loading, the punched sheets are manually arranged to make the width directions of the punched sheets aligned as much as possible.
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