An assembly device for manufacturing transformer accessories

Abstract

The present invention discloses an assembly device for manufacturing transformer accessories, which belongs to the technical field of transformer accessory assembly, including a processing table, on which a silicon steel sheet limiting assembly is provided for positioning the silicon steel sheet, and an iron core coil assembly unit is also provided for stacking the iron core components and assembling the coil and the iron core. The present invention uses a grabbing arm to cooperate with a limiting fitting block, and when the limiting fitting block passes through the positioning hole of the silicon steel sheet, a downwardly curved surface is formed, so that the center part of the silicon steel sheet is first in contact with the surface of the bottom silicon steel sheet, and the surface of the lower silicon steel sheet will not be scratched due to the drooping of the edge part when the silicon steel sheets are stacked. The processing table equipped with an assembly slide and an assembly table cooperates with a combined hydraulic cylinder, so that after the various parts of the iron core are stacked, they can be uniformly assembled with the coil sleeve, thereby improving the integrity of the stacked iron core and achieving the effect of improving the transformer performance after assembly.

Description

Technical Field

[0001] The invention relates to the technical field of transformer accessory assembly, and in particular to an assembly device for manufacturing transformer accessories. Background Art

[0002] In order to reduce the iron loss of the transformer during use, the magnetic circuit part of the transformer is mainly composed of an iron core made of stacked silicon steel sheets. At the same time, in order to reduce the magnetic loss of the iron core during the transformation process, oblique seam silicon steel sheets are often used for stacking.

[0003] At present, the assembly process of the transformer's bevel-jointed silicon steel sheet core and coil is as follows: the silicon steel sheets cut from the steel coils are directly grabbed by a robot arm and automatically stacked on the designated assembly table. After the E-shaped parts, the side sheets and the center column sheets are stacked, they are fixed by cable ties. The primary coil and the secondary coil are then sleeved on the stabilized core surface. Finally, the uninstalled side sheets are plugged into the top. During the assembly of the silicon steel sheets, the core clamp cooperates with the steel frame to lock and clamp the various parts of the core, thereby completing the overall assembly process of the core. The overall assembly after completion can be seen in the attached figure of the instruction manual. Figure 8 The display positions of the core stack 901, coil bobbin 902 and steel frame 903.

[0004] However, the following problems still exist in the above assembly process:

[0005] Since silicon steel sheets are elastic, the edges of the silicon steel sheets will droop downward during the stacking process by the robot, scratching the insulating coating on the surface of the stacked silicon steel sheets below, making the adjacent silicon steel sheets no longer insulated. When the transformer is working, the eddy current will increase, increasing the iron loss and accelerating the temperature rise, increasing the cooling work intensity of the cooling component;

[0006] 2. When stacking the existing bevel-jointed silicon steel sheets, the coil must first be placed on the E-shaped part, the side sheet and the middle column sheet, and then the top E-shaped sheet is stacked to the notch. However, this step-by-step stacking method will make the silicon steel sheets less integrated after stacking, increase the gap between two adjacent silicon steel sheets, increase the magnetic loss of the transformer, and reduce the transformer performance. Summary of the invention

[0007] The purpose of the present invention is to solve the problem that when the existing bevel-jointed silicon steel sheets are stacked, the surface of the lower silicon steel sheets will be scratched due to the drooping of the edges, and when the top silicon steel sheets are stacked, the step-by-step stacking method will make the silicon steel sheets have poor integrity after stacking, increase the gap between two adjacent silicon steel sheets, increase the magnetic loss of the transformer, and reduce the transformer performance. An assembly device for manufacturing transformer accessories is proposed to solve the problem that when the existing bevel-jointed silicon steel sheets are stacked, the surface of the lower silicon steel sheets will be scratched due to the drooping of the edges, and when the top silicon steel sheets are stacked, the step-by-step stacking method will make the silicon steel sheets have poor integrity after stacking, increase the gap between two adjacent silicon steel sheets, increase the magnetic loss of the transformer, and reduce the transformer performance.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] An assembly device for manufacturing transformer accessories, comprising a processing table for assembling transformer cores, a silicon steel sheet limiting assembly provided on the processing table for positioning the silicon steel sheets, a core-coil assembly unit provided on the processing table for stacking core components and assembling coils and cores, and the core-coil assembly unit is composed of a core stacking mechanism and a core combining mechanism;

[0010] The silicon steel sheet limiting assembly includes an assembly table arranged on the top of the processing table, an assembly slide seat is arranged around the outer side of the assembly table, a limiting slide bar is arranged on the top of the assembly table and the assembly slide seat, and a limiting fitting pressing block is arranged on the top of the limiting slide bar;

[0011] The iron core stacking mechanism includes a stacking bracket, which is arranged on the top of the assembly table and the assembly slide, and a servo motor is arranged on the stacking bracket. The servo motor output shaft is provided with a stacking drive assembly, and the stacking drive assembly is composed of a translation sliding module, a lifting hydraulic cylinder and a grabbing arm. The grabbing arm is fixed to the bottom of the translation sliding module through the lifting hydraulic cylinder, and a grabbing electromagnet is arranged under the grabbing arm;

[0012] The iron core assembly mechanism comprises a combined hydraulic cylinder arranged at the bottom edge of the processing table. The combined hydraulic cylinder is fixed to the assembly slide seat through a combined hydraulic connecting rod and is used to drive the assembly slide seat to move closer to the assembly table.

[0013] Preferably, the assembly slide is arranged around the assembly table, and a combination table is arranged inside the assembly table and the assembly slide, and bundling holes are opened on the combination table, which are used to bundle the stacked silicon steel sheets. The combination table is lifted and lowered by a hydraulic lifting assembly, and the hydraulic lifting assembly is composed of an assembly hydraulic cylinder and an assembly hydraulic connecting rod.

[0014] Preferably, a plurality of linearly arranged grabbing columns are fixed at the bottom of the grabbing arm, and the plurality of grabbing columns pick up the silicon steel sheets through grabbing electromagnets, and the plurality of grabbing electromagnets are controlled to be turned on or off by the same conductive switch.

[0015] Preferably, symmetrically arranged stacking conveyor belts are arranged around the processing table, and stacked silicon steel sheets are placed on the top of the stacking conveyor belts for grabbing by the grabbing arms, and the conveying directions of the multiple stacking conveyor belts are all towards the processing table.

[0016] Preferably, a silicon steel sheet detection mechanism is also provided on the processing table, which is used to detect whether the surface insulation layer of the silicon steel sheet is intact and whether there are gaps between the stacked silicon steel sheets. The silicon steel sheet detection mechanism consists of a scratch detection component and a gap detection component. The scratch detection component includes an opposing detection seat arranged in the assembly table and the assembly slide. The opposing detection seat consists of a power supply seat and a contact detection seat. A plurality of detection contacts electrically connected to the silicon steel sheet are arranged in the opposing detection seat, and the spacing between the plurality of detection contacts is adapted to the spacing of the stacked silicon steel sheets.

[0017] Preferably, a detection power supply and a current detector are also provided in the opposing detection seat. The detection power supply is provided in the power supply seat to supply power to a single detection contact in the power supply seat. The current detector is provided in the contact detection seat to detect the current flow of all the detection contacts on the contact detection seat, thereby detecting the power-on status of the detection contacts through the current detector, and detecting whether the surface insulation layer of the silicon steel sheets is intact before stacking.

[0018] Preferably, the gap detection assembly includes a detection sleeve arranged at the bottom of the limiting slide rod, a tension detector is arranged in the detection sleeve, and the outer diameter of the detection sleeve is adapted to the positioning hole opened on the silicon steel sheet, and the tension detector is fixed to the bottom of the limiting slide rod through a detection spring.

[0019] Preferably, an extension control stepper motor is arranged inside the limiting fitting block, an extension control cylinder is arranged on the top of the extension control stepper motor, the output shaft of the extension control stepper motor is movably connected to an extension sealing plug through a lifting screw, and the inner wall of the extension control cylinder is slidably connected to an extension control column slidably connected to the limiting fitting block.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. By using a grabbing arm equipped with a grabbing electromagnet in cooperation with a limiting fitting block, a downwardly curved surface can be formed when the limiting fitting block passes through the positioning hole of the silicon steel sheet, so that the center part of the silicon steel sheet is first in contact with the surface of the bottom silicon steel sheet, and then the edge area of ​​the silicon steel sheet is in contact with the surface of the bottom silicon steel sheet, so that when the silicon steel sheets are stacked, the edge part will not droop and cause scratches on the surface of the lower silicon steel sheet.

[0022] 2. By using a processing table equipped with an assembly slide and an assembly table in conjunction with a combined hydraulic cylinder, after the core components are stacked, the coil sleeve can be placed on the side pieces and the middle column piece, and then the assembly slide corresponding to the side piece can be moved closer to the middle column piece to form an iron core as a whole, which is convenient for directly locking the positions of the two through a steel frame during the subsequent assembly process, thereby improving the integrity after stacking, reducing magnetic loss, and improving the transformer performance of the assembled transformer.

[0023] 3. By using a power supply socket equipped with detection contacts in conjunction with a contact detection socket, it is possible to detect whether adjacent silicon steel sheets are energized, thereby ensuring that the iron core after subsequent assembly forms a magnetic field and the generated eddy current circuit is only distributed in each silicon steel sheet, thereby avoiding the silicon steel sheets that scratch the insulating layer from participating in the stacking process, increasing the iron loss of the assembled transformer, and reducing the transformer performance of the assembled transformer.

[0024] 4. By using a tension detector equipped with a detection spring in conjunction with a limit slide bar, the increased stacking thickness when the last silicon steel sheet is stacked can be detected. When the stacking thickness is consistent with the thickness of the silicon steel sheet, it indicates that there is no gap or intermittent gap between adjacent silicon steel sheets and meets the stacking standard, thereby avoiding the situation where there are large gaps between adjacent silicon steel sheets, increasing the magnetic loss of the assembled transformer, and then reducing the transformer performance of the assembled transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall structure of an assembly device for manufacturing transformer accessories proposed by the present invention;

[0026] Figure 2 This is a structural schematic diagram of a processing table, a stacking conveyor belt and an assembly slide in an assembly device for manufacturing transformer parts proposed by the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of an assembly table and an assembly slide seat on a processing table in an assembly device for manufacturing transformer parts proposed by the present invention;

[0028] Figure 4 A schematic diagram of the internal structure of a cross section of an assembly table in an assembly device for manufacturing transformer parts proposed by the present invention;

[0029] Figure 5 For the present invention Figure 4 A in the enlarged view;

[0030] Figure 6 This is a schematic diagram of the internal structure of an assembly table and a combined hydraulic cylinder in an assembly device for manufacturing transformer parts proposed by the present invention;

[0031] Figure 7 This is a schematic diagram of the connection structure of a tension detector, a limit slide bar and a limit fitting block in a detection sleeve in an assembly device for manufacturing transformer accessories proposed by the present invention;

[0032] Figure 8 This is the assembly view of the core, coil and steel frame structure after the bevel-jointed silicon steel sheets are assembled as a whole.

[0033] In the figure: 1. Processing table; 11. Assembly table; 12. Assembly slide; 13. Limiting slide rod; 14. Limiting fitting block; 15. Combination table; 151. Assembly hydraulic cylinder; 152. Assembly hydraulic connecting rod; 2. Stacking bracket; 21. Servo motor; 22. Translation sliding module; 23. Lifting hydraulic cylinder; 231. Grabbing column; 24. Grabbing arm; 25. Grabbing electromagnet; 3. Stacking conveyor belt; 4. Opposing detection seat; 41. Power supply seat; 42. Contact detection seat; 43. Detection contact; 5. Detection sleeve; 51. Tension detector; 52. Detection spring; 6. Extension control stepper motor; 61. Lifting screw; 7. Extension control cylinder; 71. Extension sealing plug; 72. Extension control column; 8. Combination hydraulic cylinder; 81. Combination hydraulic connecting rod; 901. Core stack; 902. Coil barrel; 903. Steel frame. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Example, see Figures 1 to 8, an assembly device for manufacturing transformer accessories, including a processing table 1 for assembling transformer cores, a silicon steel sheet limiting assembly is provided on the processing table 1 for positioning the silicon steel sheets, a core-coil assembly unit is provided on the processing table 1 for stacking core components and assembling coils and cores, and the core-coil assembly unit consists of a core stacking mechanism and a core combining mechanism.

[0038] It should be noted that the silicon steel sheets involved in the assembly of the transformer core in the present invention are in the shape of a "sun" after assembly, and each silicon steel sheet is obtained by shearing on a silicon steel sheet roll. In order to reduce the size of eddy current in the iron loss, an insulating layer is often coated or plated on the surface of the silicon steel sheet roll, but the silicon steel sheet will not be insulated at the cut edge. This is the material property of the existing "sun" shaped oblique seam silicon steel sheet, and will not be repeated in the subsequent description of the silicon steel sheet characteristic processing process.

[0039] exist Figure 8 In the embodiment, the side pieces of the core stack 901 are arranged on the left and right sides of the top of the bottom serration piece, the middle column piece of the core stack 901 is arranged between the two side pieces, the top serration piece is arranged on the top of the side piece and the middle column piece, and the coil sleeve is arranged outside the side piece and the middle column piece;

[0040] The coil pointed out in the present invention is the existing coil sleeve after winding. After the silicon steel sheets are stacked and stabilized, the coil sleeve is sleeved on the side pieces and the middle column pieces of the core stack 901, and then the various parts of the core are closed through the core coil assembly unit to complete the assembly process of the coil and the core. This is the assembly method of the existing coil tube 902 and the core stack 901, and will not be repeated in the subsequent description of the assembly process of the core stack 901 and the coil tube 902.

[0041] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the silicon steel sheet limiting assembly includes an assembly table 11 arranged on the top of the processing table 1, and an assembly slide 12 is arranged around the outer side of the assembly table 11. A limiting slide rod 13 is arranged on the top of the assembly table 11 and the assembly slide 12, and a limiting fitting block 14 is arranged on the top of the limiting slide rod 13.

[0042] It should be noted that the center column piece is stacked on the top of the assembly table 11, and the side pieces and the elbow pieces are stacked on the top of the assembly slide 12. When stacking the center column piece, the assembly table 11 can be slid to the edge and fixed first, and then the center column piece is stacked by the iron core stacking mechanism, and then the assembly table 11 is slid to the center of the top of the processing table 1 and fixed, so as not to affect the iron core stacking process of the side pieces and the elbow pieces.

[0043] In order to position the silicon steel sheets, positioning holes are usually cut out on the silicon steel sheets, so that when the silicon steel sheets are placed on the assembly table 11 and the assembly slide 12, the detection sleeve 5 can contact the positioning holes and the silicon steel sheets can be accurately placed on top of them. This is the limiting and guiding process of the existing automatic stacking process of silicon steel sheets, which will not be repeated in the subsequent description.

[0044] Furthermore, the assembly slide 12 is arranged around the assembly table 11, and a combination table 15 is arranged inside the assembly table 11 and the assembly slide 12, and a bundling hole is opened on the combination table 15, and the bundling hole is used to bundle the stacked silicon steel sheets. The combination table 15 is lifted and lowered by a hydraulic lifting assembly, and the hydraulic lifting assembly is composed of an assembly hydraulic cylinder 151 and an assembly hydraulic connecting rod 152;

[0045] It should be noted that after the silicon steel sheets are stacked, the hydraulic connecting rod 152 can be lifted by assembling the hydraulic cylinder 151, thereby driving the silicon steel sheets placed on the assembly table 15 to rise synchronously. Then, when the stacked silicon steel sheets are completely exposed, the stacked silicon steel sheets are bundled and stabilized by passing the bundling belt through the bundling hole through the existing bundling equipment, so that when the coil sleeve is subsequently placed on its outside, the silicon steel sheets will not become loose.

[0046] like Figure 1 and Figure 2 As shown, the core stacking mechanism includes a stacking bracket 2, which is arranged on the top of the assembly table 11 and the assembly slide 12, and a servo motor 21 is arranged on the stacking bracket 2. The output shaft of the servo motor 21 is provided with a stacking drive assembly, and the stacking drive assembly is composed of a translation sliding module 22, a lifting hydraulic cylinder 23 and a grabbing arm 24. The grabbing arm 24 is fixed to the bottom of the translation sliding module 22 through the lifting hydraulic cylinder 23, and a grabbing electromagnet 25 is arranged below the grabbing arm 24;

[0047] The processing table 1 is surrounded by symmetrically arranged stacking conveyor belts 3, and stacked silicon steel sheets are placed on the top of the stacking conveyor belts 3 for the grabbing arm 24 to pick up, and the conveying direction of the multiple stacking conveyor belts 3 is toward the conveying direction of the processing table 1. A stepping motor is arranged in the stacking conveyor belts 3, which can control the stacked silicon steel sheets to be intermittently conveyed;

[0048] It should be noted that: when the stacked silicon steel sheets on the top of the stacking conveyor belt 3 are transported to the grabbing position of the grabbing arm 24, the lifting hydraulic cylinder 23 is started to drive the grabbing arm 24 to descend, and the grabbing electromagnet 25 is turned on to pick up the silicon steel sheets on the stacking conveyor belt 3, and then the servo motor 21 drives the translation sliding module 22 to move the silicon steel sheets at the bottom of the grabbing arm 24 to the top of the assembly table 11 or the assembly slide 12, and the lifting hydraulic cylinder 23 is used to control the silicon steel sheets to fall, so that the detection sleeve 5 passes through its positioning hole and falls at the designated position, completing the stacking process of the iron core;

[0049] During the falling process of the silicon steel sheet, the center part of the silicon steel sheet can be locked first by the outwardly extended limiting fitting block 14, and the limiting slide bar 13 is driven by the detection spring 52, so that the limiting fitting block 14 first contacts the center part of the silicon steel sheet with the bottom silicon steel sheet, and then when the silicon steel sheet continues to fall, the edge part falls on the bottom silicon steel sheet, so that the edge will not sag and contact the surface of the silicon steel sheet first to cause scratches, thereby avoiding the possibility of electrical conduction between two adjacent silicon steel sheets, so that when the assembled transformer core is used, the eddy current increases, thereby increasing the loss and causing the transformer performance to decrease.

[0050] Furthermore, a plurality of linearly arranged grabbing posts 231 are fixed to the bottom of the grabbing arm 24 , and the plurality of grabbing posts 231 pick up the silicon steel sheets through the grabbing electromagnets 25 , and the plurality of grabbing electromagnets 25 are controlled to be turned on or off by the same conductive switch.

[0051] It should be noted that after the silicon steel sheet is dropped, the grabbing electromagnet 25 is turned off so that the grabbing arm 24 can rise and return to the grabbing position of the silicon steel sheet, so as to facilitate grabbing the next silicon steel sheet.

[0052] like Figure 4 , Figure 5 and Figure 6 As shown, a silicon steel sheet detection mechanism is also provided on the processing table 1, which is used to detect whether the surface insulation layer of the silicon steel sheet is intact and whether there are gaps between the stacked silicon steel sheets. The silicon steel sheet detection mechanism consists of a scratch detection component and a gap detection component. The scratch detection component includes an opposing detection seat 4 arranged in the assembly table 11 and the assembly slide 12. The opposing detection seat 4 consists of a power supply seat 41 and a contact detection seat 42. A plurality of detection contacts 43 electrically connected to the silicon steel sheet are arranged in the opposing detection seat 4, and the spacing between the plurality of detection contacts 43 is adapted to the spacing of the stacked silicon steel sheets.

[0053] It should be noted that: when placing the silicon steel sheets on the processing table 1, in order to reduce the iron loss of the iron core after subsequent assembly, it is necessary to detect whether the surface insulation layer of the silicon steel sheets is scratched during assembly, so as to avoid the increase of the eddy current path due to the power supply of two adjacent silicon steel sheets, thereby increasing the iron loss of the iron core. In order to reduce the magnetic loss of the assembled iron core, it is necessary to detect the gaps of the silicon steel sheets during assembly, so as to avoid the expansion of the magnetic flux range of the iron core, which is not concentrated enough, and the reduction of the magnetic flux density, thereby reducing the magnetic flux, increasing the magnetic loss of the iron core, and reducing the transformer performance;

[0054] Furthermore, a detection power supply and a current detector are also provided in the opposing detection seat 4. The detection power supply is provided in the power supply seat 41 to supply power to a single detection contact 43 in the power supply seat 41. The current detector is provided in the contact detection seat 42 to detect the current flow of all the detection contacts 43 on the contact detection seat 42. Thus, the current detector detects the power supply of the detection contact 43, and detects whether the surface insulation layer of the silicon steel sheet before stacking is intact.

[0055] When detecting whether there are scratches on the surface of the silicon steel sheet that affect the eddy current path, power is supplied to a single detection contact 43 in the power supply seat 41, and the current flow of all detection contacts 43 in the contact detection seat 42 is detected. If only the detection contact 43 corresponding to the detection contact 43 powered on in the power supply seat 41 passes current in the contact detection seat 42, it indicates that the stacked silicon steel sheets are intact and there is no problem of scratches affecting the eddy current path of the core.

[0056] When the silicon steel sheet is placed for the first time, its surface insulation can be tested by placing the second silicon steel sheet subsequently. When the two silicon steel sheets are fitted together, no circuit connection will occur between them, that is, only a single detection contact 43 can be detected to be energized in the contact detection seat 42, indicating that the surface insulation of the two silicon steel sheets is intact. Before placing each subsequent silicon steel sheet, the lower intact silicon steel sheet can be energized on the power supply seat 41 to detect whether the subsequent stacked silicon steel sheets have surface scratches that affect the eddy current path of the iron core. In this way, the surface insulation of each silicon steel sheet can be tested to ensure that after the iron core and the coil are assembled, the iron loss of the iron core remains within the standard range.

[0057] like Figure 5 As shown, the gap detection assembly includes a detection sleeve 5 arranged at the bottom of the limiting slide rod 13, a tension detector 51 is arranged in the detection sleeve 5, and the outer diameter of the detection sleeve 5 is adapted to the positioning hole opened on the silicon steel sheet, and the tension detector 51 is fixed to the bottom of the limiting slide rod 13 through a detection spring 52.

[0058] It should be noted that the detection sleeve 5 is fixed in the assembly table 11 and the assembly slide 12, and will not change position with the lifting and lowering of the assembly table 15, and a sliding hole for the limited fitting block 14 to slide is opened on the inner wall of the detection sleeve 5, so that when each silicon steel sheet is stacked, it can be limited by the outer wall of the detection sleeve 5, so that it can be fixed at the designated position of the stacking, and will not shake at will, and Figure 5 and Figure 7 As shown, the cross section of the limiting fitting block 14 is set to be polygonal, and can rise continuously as the stacking height of the silicon steel sheets increases;

[0059] When detecting the gap between two adjacent silicon steel sheets, each time a silicon steel sheet is stacked, the limiting fitting block 14 will be driven to rise, generating an upward pulling force on the limiting slide bar 13, and the tension detector 51 connected to the detection spring 52 will detect the difference in tension before and after stacking, so as to obtain the changed displacement according to Hooke's law, that is, the gap value between the two adjacent silicon steel sheets before and after stacking, and then the gap before and after the stacking of the silicon steel sheets can be detected by the rising height of the limiting fitting block 14 each time, to ensure that the magnetic flux range of the core after stacking is relatively concentrated.

[0060] Furthermore, an extension control stepper motor 6 is arranged inside the limiting fitting block 14, and an extension control cylinder 7 is arranged on the top of the extension control stepper motor 6. The output shaft of the extension control stepper motor 6 is movably connected to an extension sealing plug 71 through a lifting screw 61, and the inner wall of the extension control cylinder 7 is slidably connected to an extension control column 72 which is slidably connected to the limiting fitting block 14.

[0061] It should be noted that: when it is necessary to assemble the stacked and bundled silicon steel sheets and coils, the extension control stepper motor 6 drives the lifting screw 61 to rotate, so that the extension sealing plug 71 descends, the air pressure in the extension control cylinder 7 is reduced, and the extension control column 72 is retracted into the detection sleeve 5, which does not hinder the rise of the stacked silicon steel sheets.

[0062] like Figure 1 and Figure 6 As shown, the core assembly mechanism includes a combined hydraulic cylinder 8 arranged at the bottom edge of the processing table 1. The combined hydraulic cylinder 8 is fixed to the assembly slide 12 through a combined hydraulic connecting rod 81, and is used to drive the assembly slide 12 to move closer to the assembly table 11.

[0063] It should be noted that: after the core components are stacked, the existing coil sleeve is sleeved on the side pieces and the center column, and then the combined hydraulic cylinder 8 is started to drive the combined hydraulic connecting rod 81 to drive the assembly slide 12 to close toward the assembly table 11 to form a complete core as a whole, so that in the subsequent assembly process, workers can lock the two through the steel frame 903.

[0064] Working principle:

[0065] The present invention is divided into an iron core stacking process and an iron core and coil assembly process when assembling the iron core and the coil. In the iron core stacking process, whether the insulation layer of each silicon steel sheet is intact and whether the stacking gap is qualified is detected, so as to ensure that the iron loss and magnetic loss of the iron core after assembly are within the standard range, and the iron loss and magnetic loss will not increase due to mistakes in the assembly process.

[0066] The stacking process of the iron core is as follows: when the stacked silicon steel sheets on the top of the stacking conveyor belt 3 are conveyed to the grabbing position of the grabbing arm 24, the lifting hydraulic cylinder 23 is started to drive the grabbing arm 24 to descend, and the grabbing electromagnet 25 is turned on to pick up the silicon steel sheets on the stacking conveyor belt 3, and then the servo motor 21 drives the translation sliding module 22 to move the silicon steel sheets at the bottom of the grabbing arm 24 to the top of the assembly table 11 or the assembly slide 12, and the lifting hydraulic cylinder 23 is used to control the silicon steel sheets to fall, so that the detection sleeve 5 passes through its positioning hole and falls at the designated position, completing the stacking process of the iron core;

[0067] During the falling process of the silicon steel sheet, the center part of the silicon steel sheet can be locked first by the outwardly extended limiting fitting block 14, and the limiting slide bar 13 is driven by the detection spring 52, so that the limiting fitting block 14 first contacts the center part of the silicon steel sheet with the bottom silicon steel sheet, and then when the silicon steel sheet continues to fall, the edge part falls on the bottom silicon steel sheet, so that the edge will not sag and contact the surface of the silicon steel sheet first to cause scratches, thereby avoiding the possibility of electrical conduction between two adjacent silicon steel sheets, so that when the assembled transformer core is used, the eddy current increases, thereby increasing the loss and causing the transformer performance to decrease.

[0068] The detection process of the insulating layer between adjacent silicon steel sheets of the iron core is as follows: when detecting whether there are scratches on the surface of the silicon steel sheets that affect the eddy current path, power is supplied to a single detection contact 43 in the power supply seat 41, and the current flow of all detection contacts 43 in the contact detection seat 42 is detected. If only the detection contact 43 corresponding to the detection contact 43 energized in the power supply seat 41 is detected to pass current in the contact detection seat 42, it indicates that the stacked silicon steel sheets are intact and there is no problem of scratches affecting the eddy current path of the iron core.

[0069] The detection process of the stacked gap between adjacent silicon steel sheets of the iron core is as follows: when detecting the gap between two adjacent silicon steel sheets, each stacking of the silicon steel sheets will drive the limit fitting block 14 to rise, generating an upward pulling force on the limit slide bar 13, and the tension detector 51 connected to the detection spring 52 detects the difference in tension before and after stacking, so as to obtain the changed displacement according to Hooke's law, that is, the gap value between the two adjacent silicon steel sheets before and after stacking, and then the gap before and after the stacking of the silicon steel sheets can be detected by the rising height of the limit fitting block 14 each time, to ensure that the magnetic flux range of the iron core after stacking is relatively concentrated.

[0070] The stacking process of the iron core and the coil is as follows: when the stacked and bundled silicon steel sheets and coils need to be assembled, the extension control stepper motor 6 drives the lifting screw 61 to rotate, so that the extension sealing plug 71 descends, the air pressure in the extension control cylinder 7 is reduced, and the extension control column 72 is retracted into the detection sleeve 5, which does not hinder the rise of the stacked silicon steel sheets.

[0071] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An assembly device for manufacturing transformer parts, comprising a processing table (1) for assembling transformer cores, characterized in that: The processing table (1) is provided with a silicon steel sheet limiting assembly for positioning the silicon steel sheet, and the processing table (1) is provided with an iron core coil assembly unit for stacking the iron core components and assembling the coil and the iron core, and the iron core coil assembly unit is composed of an iron core stacking mechanism and an iron core combining mechanism; The silicon steel sheet limiting assembly comprises an assembly table (11) arranged on the top of the processing table (1), an assembly slide seat (12) is arranged around the outer side of the assembly table (11), a limiting slide bar (13) is arranged on the top of the assembly table (11) and the assembly slide seat (12), and a limiting fitting pressing block (14) is arranged on the top of the limiting slide bar (13); The core stacking mechanism comprises a stacking bracket (2), the stacking bracket (2) being arranged on the top of the assembly table (11) and the assembly slide (12), the stacking bracket (2) being provided with a servo motor (21), the output shaft of the servo motor (21) being provided with a stacking drive assembly, the stacking drive assembly being composed of a translation sliding module (22), a lifting hydraulic cylinder (23) and a grabbing arm (24), the grabbing arm (24) being fixed to the bottom of the translation sliding module (22) via the lifting hydraulic cylinder (23), and a grabbing electromagnet (25) being provided below the grabbing arm (24); The iron core assembly mechanism comprises a combined hydraulic cylinder (8) arranged at the bottom edge of the processing table (1), the combined hydraulic cylinder (8) being fixed to the assembly slide (12) via a combined hydraulic connecting rod (81) and being used to drive the assembly slide (12) to move closer to the assembly table (11); The processing table (1) is also provided with a silicon steel sheet detection mechanism for detecting whether the insulating layer on the surface of the silicon steel sheet is intact and whether there are gaps between the stacked silicon steel sheets. The silicon steel sheet detection mechanism is composed of a scratch detection component and a gap detection component. The scratch detection component includes an opposing detection seat (4) arranged in the assembly table (11) and the assembly slide (12). The opposing detection seat (4) is composed of a power supply seat (41) and a contact detection seat (42). A plurality of detection contacts (43) electrically connected to the silicon steel sheet are arranged in the opposing detection seat (4), and the spacing between the plurality of detection contacts (43) is adapted to the spacing between the stacked silicon steel sheets. The opposing detection seat (4) is also provided with a detection power supply and a current detector. The detection power supply is arranged in the power supply seat (41) to supply power to a single detection contact (43) in the power supply seat (41). The current detector is arranged in the contact detection seat (42) to detect the current flow of all the detection contacts (43) on the contact detection seat (42). Thus, the current detector detects the power supply of the detection contact (43) and detects whether the surface insulation layer of the silicon steel sheets before stacking is intact.

2. The assembly equipment for manufacturing transformer parts according to claim 1, characterized in that: The assembly slide (12) is arranged around the assembly table (11), and a combination table (15) is arranged inside the assembly table (11) and the assembly slide (12), and a bundling hole is opened on the combination table (15), and the bundling hole is used to bundle the stacked silicon steel sheets. The combination table (15) is raised and lowered by a hydraulic lifting component, and the hydraulic lifting component is composed of an assembly hydraulic cylinder (151) and an assembly hydraulic connecting rod (152).

3. The assembly equipment for manufacturing transformer parts according to claim 1, characterized in that: A plurality of linearly arranged grabbing columns (231) are fixed to the bottom of the grabbing arm (24); the plurality of grabbing columns (231) pick up the silicon steel sheet via grabbing electromagnets (25); and the plurality of grabbing electromagnets (25) are controlled to be turned on or off via the same conductive switch.

4. The assembly equipment for manufacturing transformer parts according to claim 1, characterized in that: The processing table (1) is provided with symmetrically arranged stacking conveyor belts (3) on all four sides, and stacked silicon steel sheets are placed on the top of the stacking conveyor belts (3) for picking up by the grabbing arm (24), and the conveying direction of the multiple stacking conveyor belts (3) is the conveying direction towards the processing table (1).

5. The assembly equipment for manufacturing transformer parts according to claim 1, characterized in that: The gap detection assembly comprises a detection sleeve (5) arranged at the bottom of the limit slide bar (13), a tension detector (51) is arranged in the detection sleeve (5), and the outer diameter of the detection sleeve (5) is matched with the positioning hole opened on the silicon steel sheet, and the tension detector (51) is fixed to the bottom of the limit slide bar (13) through a detection spring (52).

6. The assembly equipment for manufacturing transformer parts according to claim 5, characterized in that: An extension control stepper motor (6) is arranged inside the position-limiting fitting block (14), an extension control cylinder (7) is arranged on the top of the extension control stepper motor (6), an output shaft of the extension control stepper motor (6) is movably connected to an extension sealing plug (71) via a lifting screw (61), and an extension control column (72) slidably connected to the position-limiting fitting block (14) is slidably connected to the inner wall of the extension control cylinder (7).

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