A slitting system and method for transformer core silicon steel sheets

Abstract

The present invention discloses a slitting system and method for transformer core silicon steel sheets, comprising a spacing-adjusting pressing device, a rolling and deburring device, and a winding device; the spacing-adjusting pressing device has a plurality of pressing members, and when the rolling and shearing device rolls the silicon steel strip, the spacing between the pressing members pressing the silicon steel strip is adjusted according to the width of the rolling and shearing belt; the rolling and deburring device has a shearing rolling member, and during the transportation process, the silicon steel strip is rolled by the shearing rolling member to grind away burrs exposed outside the shearing structure; the winding drum of the winding device has an elastic pressing member, and when the winding drum rotates to rewind the silicon steel strip, the elastic pressing member presses the silicon steel strip so that the silicon steel strip is tightly wound and stacked. The present invention improves the quality and efficiency of silicon steel sheet slitting production by using the cushioning property of the pressing member to prevent damage to the pressed material, the shearing rolling member to pre-remove burrs outside the shearing structure to prevent damage to the sandpaper, and the elastic pressing member to maintain the tight pressing of the silicon steel strip to prevent loosening and delamination.

Description

Technical Field

[0001] The invention belongs to the technical field of slitting processing of transformer iron core silicon steel sheets, and in particular relates to a slitting system and a slitting method for transformer iron core silicon steel sheets. Background Art

[0002] When rolling and shearing silicon steel strips, it is necessary to use a downward pressing component to press the silicon steel strips. The cylinder is used to directly control the downward pressing plate of the pressing material. In the process of contacting the pressing material, due to direct hard contact with the silicon steel strip, the cushioning is insufficient, and it is easy to cause indentation and deformation of the silicon steel strips. In the grinding after rolling and shearing, sandpaper is used to pad under the silicon steel strips or to wrap the longitudinal shearing side of the silicon steel strips with sandpaper, and grinding is achieved during the moving feeding process of the silicon steel strips, and the longitudinal shearing side of the silicon steel strips is not easy to be damaged. The burrs facing the strip surface will scratch the sandpaper, thereby cutting the sandpaper and reducing the service life of the sandpaper, resulting in affected grinding and deburring operations; during the winding process, since the silicon steel strip at the front end of the winding drum is in a state of being pulled by the winding force, the conveyed silicon steel strip in this area will have loose parts. When the winding operation is carried out, the silicon steel strip is prone to loosening and unwinding when wound on the winding drum; this will affect the longitudinal shearing process of the silicon steel sheet and reduce the quality and efficiency of the longitudinal shearing production of the silicon steel sheet. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a longitudinal shearing system and method for transformer core silicon steel sheets, which improves the quality and efficiency of the longitudinal shearing production of silicon steel sheets by means of the buffering downward pressure of the clamping parts to prevent damage to the pressed material, the pre-removal of burrs outside the shear structure by the shear grinding parts to prevent damage by sandpaper, and the maintenance of tight pressing of the silicon steel strip by the elastic pressing parts to prevent loosening and delamination.

[0004] Technical solution: To achieve the above-mentioned purpose, the present invention provides a method for longitudinally shearing silicon steel sheets for transformer cores, which adopts a longitudinal shearing system to longitudinally shear silicon steel strips;

[0005] The device comprises a distance-adjusting pressing device on the same surface as the rolling shear device, wherein the distance-adjusting pressing device has a plurality of pressing members. When the rolling shear device rolls the silicon steel strip, the spacing between the pressing members pressing the silicon steel strip is adjusted according to the width of the rolling shear;

[0006] The deburring device comprises a rolling grinding device, which has a shearing grinding member that fits the shearing structure of the adjacent silicon steel strip. The silicon steel strip is rolled by the shearing grinding member to grind away burrs exposed outside the shearing structure during transportation.

[0007] The winding device includes a winding drum with an elastic material pressing piece parallel to the winding drum. The elastic material pressing piece is located at the material feeding end of the winding drum. When the winding drum rotates to rewind the silicon steel strip, the elastic material pressing piece presses the silicon steel strip so that the silicon steel strip is tightly wound and stacked.

[0008] During the rolling shearing process, the pressing action is first performed by moving the pressing piece downward, so that the elastic pressing points and the hard pressing points of the pressing piece jointly press the silicon steel strip, and then rolling shearing is performed, and during the downward movement of the pressing piece, the elastic pressing action of the elastic pressing point is in front, providing a buffer for the hard pressing action, and the hard pressing action of the hard pressing point is in the back, pressing the silicon steel strip; during the rolling deburring process, the silicon steel strip is fed in a broken line trajectory along the upper and lower alternatingly spaced shear rolling pieces, and the shear rolling pieces slowly rotate in the direction opposite to the feeding direction of the silicon steel strip to roll and deburr; during the winding process, the elastic pressing piece maintains a state of radially pressing the silicon steel strip relative to the winding drum, and as the thickness of the winding layers on the winding drum increases, the elastic pressing piece moves radially upward relative to the winding drum to gradually adjust the height to maintain the tightness of the winding stacking of the silicon steel strip.

[0009] Furthermore, an unwinding device is provided before the rolling shearing device, and the silicon steel strip is released through the unwinding device.

[0010] Furthermore, on the clamping member, there is at least one elastic clamping point and multiple hard clamping points, which are evenly distributed, so that the force points where the silicon steel strip is hard-compressed are evenly distributed.

[0011] Furthermore, the elastic pressing points on the same pressing member constitute a single elastic pressing point structure or a double elastic pressing point structure or a multiple elastic pressing point structure; the hard pressing points on the same pressing member constitute a multiple hard pressing point structure.

[0012] Furthermore, the elastic pressing points are correspondingly provided with elastic pressing structures, and the hard pressing points are correspondingly provided with hard pressing structures; when the pressing piece moves downward to press the silicon steel strip, the elastic pressing structure elastically presses the silicon steel strip downward and contracts to the hard pressing structure to press the silicon steel strip.

[0013] Furthermore, when the shearing rolling grinding member slowly rotates to remove burrs, the shearing rolling grinding member has a vibration driving force in the axial direction, so that the shearing rolling grinding member generates a micro-displacement in the axial direction.

[0014] Furthermore, the shear seam grinding member is composed of a plurality of grinding columns arranged coaxially and side by side; the side surfaces of the grinding columns are grinding surfaces densely covered with abrasives, and the grinding columns correspond to the shear seam structure.

[0015] Furthermore, the winding device has a winding layer thickness detection unit. During the winding process, the elastic pressing piece is gradually lifted by the corresponding lifting drive member according to the thickness detection result of the winding layer thickness detection unit.

[0016] Furthermore, the elastic pressing piece has guide pieces that are parallel to each other and relatively fixed, and the guide pieces are located below the front end of the elastic pressing piece; the silicon steel strip in the descending conveying state is redirected around the guide pieces, so that the silicon steel strip is in a climbing posture in the strip part between the guide pieces and the elastic pressing piece.

[0017] Furthermore, a grinding device is provided between the rolling deburring device and the winding device, and the rolled cut edge of the silicon steel strip is ground by the grinding device to remove the burrs hidden in the shear seam structure.

[0018] Beneficial effects: The slitting system and slitting method for transformer core silicon steel sheets of the present invention have the following beneficial effects:

[0019] 1) Improve the quality and efficiency of silicon steel sheet slitting production;

[0020] 2) The elastic pressing structure and the rigid pressing structure of the pressing member realize elastic buffering and then rigid pressing of the silicon steel strip, which will not cause damage to the silicon steel strip and avoid damage such as indentation and deformation caused by the rigid pressing of the plate;

[0021] 3) The shear rolling grinding piece removes the burrs on the longitudinal shear side facing the strip surface during the feeding process of the silicon steel strip, thereby achieving pre-removal of the burrs at this position, avoiding the sandpaper being scraped and cut in the subsequent main grinding process, affecting the grinding and deburring operation, and the deburring is thorough and efficient;

[0022] 4) The elastic pressing piece is used to press the silicon steel strip so that the silicon steel strip is tightly wound and stacked. The elastic pressing piece gradually moves upward as the thickness of the winding layer increases to maintain the state of tightly pressing the silicon steel strip, thereby achieving the ability to keep the pressing and preventing loosening and unwinding synchronously with the progress of the winding operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Attachment Figure 1 It is a structural block diagram of the method for slitting silicon steel sheets for transformer cores of the present invention;

[0024] Attachment Figure 2 It is a structural diagram of the distance-adjusting pressing device;

[0025] Attachment Figure 3 It is a structural diagram of a barrel grinding and deburring device;

[0026] Attachment Figure 4 It is a structural diagram of the silicon steel strip being fed and rolled along a shear seam rolling piece in a broken line track;

[0027] Attachment Figure 5 It is a structural diagram of the winding device. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the accompanying drawings.

[0029] A method for longitudinally shearing silicon steel sheets for transformer cores comprises a longitudinal shearing system, and the longitudinal shearing system is used to longitudinally shear silicon steel strips.

[0030] As attached Figure 1 and attached Figure 2 As shown, it includes a distance-adjusting pressing device 1 on the same surface as the rolling shearing device. The distance-adjusting pressing device 1 has multiple clamping parts 2. When the rolling shearing device rolls the silicon steel strip, the spacing of the clamping parts 2 to clamp the silicon steel strip is adjusted according to the bandwidth of the rolling shearing. A unwinding device is provided before the rolling shearing device, and the silicon steel strip is released through the unwinding device. In the prior art, multiple pressure plates controlled by cylinders are used to directly implement hard downward pressing of the silicon steel strip. Due to insufficient cushioning, direct hard contact pressing can easily cause indentations and deformation damage to the silicon steel strip, resulting in unqualified processed products and economic losses. In order to solve the above problems, in the present invention, during the rolling shearing process, the pressing action is first performed by moving the pressing member 2 downward, so that the elastic pressing points and the hard pressing points of the pressing member 2 jointly press the silicon steel strip, and then rolling shearing is performed. In the process of moving the pressing member 2 downward, the elastic pressing action of the elastic pressing point comes first to provide a buffer for the hard pressing action, and the hard pressing action of the hard pressing point comes later to press the silicon steel strip. More specifically, the elastic pressing points are correspondingly provided with elastic pressing structures 21, and the hard pressing points are correspondingly provided with hard pressing structures 22; when the pressing member 2 moves down to press the silicon steel strip, the elastic pressing structure 21 elastically presses the silicon steel strip and shrinks to the hard pressing structure 22 to press the silicon steel strip, thereby achieving elastic buffering and then hard pressing of the silicon steel strip through the elastic pressing structure 21 and the hard pressing structure 22 of the pressing member 2, without causing damage to the strip, thereby solving the problem of indentation and deformation of the silicon steel strip caused by direct hard pressure of the plate.

[0031] The elastic pressing points on the same pressing member 2 constitute a single elastic pressing point structure, a double elastic pressing point structure, or a multiple elastic pressing point structure; the hard pressing points on the same pressing member 2 constitute a multiple hard pressing point structure. On the pressing member 2, there is at least one elastic pressing point, and there are multiple hard pressing points. The hard pressing points are evenly distributed, so that the force points of the silicon steel strip being hard pressed are evenly distributed. The elastic pressing material serves as a buffer for the hard pressing material, and the hard pressing plays the most important role in pressing the material. Therefore, the hard pressing is mainly used to ensure the compaction of the pressing material, and the elastic pressing material is used to provide buffering protection as a supplement. The two work together to achieve a damage-free and compact pressing operation of the silicon steel strip.

[0032] The elastic pressing structure 21 is an axially retractable elastic component, such as an elastic retractable rod composed of an outer sleeve, an inner rod, and a spring; the rigid pressing structure 22 is a plate component or a rod component with a flat pressing surface. The pressing member 2 is installed on the corresponding adjustable distance support, which includes a support beam 2.1 spanning the silicon steel strip, a rack 2.2 set on the support beam 2.1, and a gear 2.3 meshing with the rack 2.2; a pressing cylinder 2.8 is connected to the support beam 2.1; a limited strip hole 2.10 is provided on the support beam 2.1, and the central axis 2.4 of the gear 2.3 extends downward through the limited strip hole 2.10 to the bottom surface of the support beam 2.1, and the lower end of the central axis 2.4 A stopper 2.5 is installed. One end of the central shaft 2.4 on one side of the gear 2.3 is connected to a support plate 2.7. The pressing member 2 is mounted at the lower end of the support plate 2.7. A servo motor 2.6, which drives the central shaft 2.4, is mounted at the top of the support plate 2.7. The outer side of the support beam 2.1 has a guide slot 2.11, and the inner side of the support plate 2.7 has a protrusion 2.71 that corresponds to the guide slot 2.11. The protrusion 2.71 slides into the guide slot 2.11. When the distance between adjacent pressing members 2 needs to be adjusted, the servo motor 2.6 is activated to provide driving force for automatic distance adjustment, which is very convenient.

[0033] As attached Figure 1 , Attachment Figure 3 and attached Figure 4As shown, the deburring device 3 includes a shearing roller 4 that fits the shearing structure of the adjacent silicon steel strip. During the conveying process, the silicon steel strip is rolled by the shearing roller 4 to remove burrs exposed outside the shearing structure. More specifically, during the deburring process, the silicon steel strip is fed along the shearing roller 4 with alternating spacing between the upper and lower shearing rollers 4 in a zigzag trajectory. The shearing roller 4 slowly rotates in a direction opposite to the feeding direction of the silicon steel strip 3 to deburr. The shearing roller 4 removes burrs on the longitudinal shearing edge facing the strip surface during the feeding process of the silicon steel strip, thereby pre-removing burrs at this location and preventing the sandpaper from being scraped and cut in the subsequent main deburring process, which affects the deburring process. Moreover, during the deburring operation, as the silicon steel strip is fed in a zigzag trajectory around the shearing roller 4, the burrs extending from the longitudinally cut side of the silicon steel strip toward the two strip surfaces of the silicon steel strip are simultaneously removed, that is, double-sided deburring. The deburring is not only thorough but also relatively efficient. It is worth noting that the shearing roller 4 is composed of a number of coaxially arranged grinding columns 41; the grinding columns 41 are arranged on the corresponding bracket 3.3 through the rotating shaft, the bottom of the bracket 3.3 is supported by the guide rail 3.4, and the side of the bracket 3.3 is connected to the transverse vibration device 3.2 that provides the vibration driving force. When the shearing roller 4 slowly rotates and deburrs, the shearing roller 4 has a vibration driving force in the axial direction, which causes the shearing roller 4 to produce a micro-displacement in the axial direction. Therefore, through this micro-displacement perpendicular to the feeding direction, the shearing roller 4 can be deburred more quickly, thoroughly, and neatly.

[0034] More specifically, the side surfaces of the grinding cylinders 41 are densely covered with abrasives, and the grinding cylinders 41 correspond to the shear slit structure. During the deburring process, only the area near the shear slit structure where the burrs are located is subjected to grinding, without grinding the entire surface of the silicon steel strip or unaffected areas, thereby preventing wear on the silicon steel strip.

[0035] A grinding device is provided between the rolling deburring device 3 and the winding device 5 , and the rolled cut edge of the silicon steel strip is ground by the grinding device to remove the burrs hidden in the shear seam structure.

[0036] As attached Figure 1 and attached Figure 5As shown, it includes a winding device 5. The silicon steel strip at the front end of the winding drum 6 is in a state of being pulled by the winding force. The conveyed silicon steel strip in this area will have a loose part. When the winding operation is performed, the silicon steel strip is easily loosened and unwound when wound on the winding drum 6, which can easily lead to loose winding and insufficient tightness. In severe cases, unwinding is likely to occur. In order to solve the above problems, in the present invention, the winding drum 6 of the winding device 5 has an elastic pressing piece 7 parallel to it. The elastic pressing piece 7 is located at the coil of the winding drum 1. At the feeding end, when the winding drum 1 rotates to wind the silicon steel strip, the elastic pressing piece 7 presses the silicon steel strip so that the silicon steel strip is tightly wound and stacked; more specifically, during the winding process, the elastic pressing piece 7 maintains a state of radially pressing the silicon steel strip relative to the winding drum 6, and as the thickness of the winding layers on the winding drum 1 increases, the elastic pressing piece 7 moves radially upward relative to the winding drum 1 and gradually adjusts the height to maintain the tightness of the winding stacking of the silicon steel strip, and can keep the pressing action to prevent loosening and unwinding synchronously according to the progress of the winding operation.

[0037] The top of the elastic pressing piece 7 is connected with a spring 5.1, a cross bar 5.4 and a lifting drive 5.2 in sequence from bottom to top. At least one spring 5.1 is a pressure sensor spring, and the lifting drive 5.2 can optionally be an electric push rod; the winding device 5 has a winding layer thickness detection unit, and the winding layer thickness detection unit is the pressure sensor spring; during the winding process, the elastic pressing piece 7 gradually lifts the elastic pressing piece 7 through the corresponding lifting drive 5.2 according to the thickness detection result of the winding layer thickness detection unit. The pressure sensor spring and the lifting drive member 5.2 are connected to a matching control system. When the elastic pressing member 7 is elastically pressed on the silicon steel strip, the pressure sensor spring measures a corresponding pressure value. As the winding progresses, the winding thickness increases, and the elastic pressing member 7 gradually moves up to compress the pressure sensor spring. The pressure value of the pressure sensor spring gradually increases, and the control system synchronously controls the lifting drive member 5.2 to gradually rise, so that the real-time pressure value measured by the pressure sensor spring gradually decreases and tends to the pressure value measured when the pressing just starts, so that the elastic pressing member 7 gradually moves up as the thickness of the winding layer increases to maintain the state of tightly pressing the silicon steel strip.

[0038] The elastic pressing member 7 has a guide member 5.3 that is parallel to and relatively fixed to each other. The guide member 5.3 is located below the front end of the elastic pressing member 7. The silicon steel strip in a downward conveying state is redirected around the guide member 5.3, so that the silicon steel strip assumes a climbing posture between the guide member 5.3 and the elastic pressing member 7. The silicon steel strip is tilted downward when it is just conveyed from the grinding station. If it is directly wound on the winding drum 1, it will easily loosen, and the elastic pressing effect of the elastic pressing member 7 will not be very good. Therefore, the guide member 5.3 is provided to redirect the silicon steel strip, so that the silicon steel strip is fed in an inclined downward direction and then becomes an upward climbing feed after it passes around the guide member 5.3, thereby improving the winding effect.

[0039] In the present invention, preferably, the elastic pressing member 7 and the guide member 5.3 are both pressing rollers, which can roll during the conveying process of the silicon steel strip without causing damage to the silicon steel strip.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for slitting silicon steel sheets for transformer cores, comprising a slitting system, characterized in that: A slitting method for slitting silicon steel strip using a slitting system; The invention comprises a distance-adjusting pressing device (1) sharing the same table surface with the rolling shearing device, wherein the distance-adjusting pressing device (1) has a plurality of pressing members (2). When the rolling shearing device rolls the silicon steel strip, the spacing between the pressing members (2) pressing the silicon steel strip is adjusted according to the width of the rolling shearing band. The deburring device (3) comprises a rolling grinding deburring device (3), wherein the rolling grinding deburring device (3) has a shearing grinding piece (4) that fits the shearing structure of the adjacent silicon steel strip. During the conveying process of the silicon steel strip, the shearing grinding piece (4) grinds away burrs exposed outside the shearing structure. The invention comprises a winding device (5), wherein a winding drum (6) of the winding device (5) has an elastic material pressing piece (7) parallel to the winding drum, and the elastic material pressing piece (7) is located at the material loading end of the winding drum (1). When the winding drum (1) rotates to wind the silicon steel strip, the elastic material pressing piece (7) presses the silicon steel strip so that the silicon steel strip is wound and stacked tightly. During the rolling shearing process, the pressing member (2) is first moved downward to perform the pressing action, so that the elastic pressing points and the hard pressing points of the pressing member (2) press the silicon steel strip together, and then rolling shearing is performed. During the downward movement of the pressing member (2), the elastic pressing action of the elastic pressing points is in front, providing a buffer for the hard pressing action, and the hard pressing action of the hard pressing points is in the back, pressing the silicon steel strip; during the rolling deburring process, the silicon steel strip is distributed along the upper and lower alternating spacings. The shearing roller (4) feeds the material in a broken line trajectory, and the shearing roller (4) slowly rotates and grinds the silicon steel strip (3) in a direction opposite to the feeding direction to remove burrs; during the winding process, the elastic pressing piece (7) maintains a radial downward pressing state of the silicon steel strip relative to the winding drum (6), and as the thickness of the winding layers on the winding drum (1) increases, the elastic pressing piece (7) moves radially upward relative to the winding drum (1) to gradually adjust the height, thereby maintaining the tightness of the winding stacking of the silicon steel strip.

2. The method for slitting silicon steel sheets for transformer core according to claim 1, wherein: An unwinding device is provided before the rolling shearing device, through which the silicon steel strip is released.

3. The method for slitting silicon steel sheets for transformer core according to claim 1, wherein: On the pressing member (2), at least one elastic pressing point is arranged, and a plurality of hard pressing points are arranged. The hard pressing points are evenly distributed, so that the force points where the silicon steel strip is hard pressed are evenly distributed.

4. The method for slitting silicon steel sheets for transformer core according to claim 3, wherein: The elastic pressing points on the same pressing member (2) form a single elastic pressing point structure, a double elastic pressing point structure, or a multi-elastic pressing point structure; the hard pressing points on the same pressing member (2) form a multi-hard pressing point structure.

5. The method for slitting silicon steel sheets for transformer core according to claim 4, characterized in that: The elastic pressing points are correspondingly provided with elastic pressing structures (21), and the hard pressing points are correspondingly provided with hard pressing structures (22); when the pressing member (2) moves downward to press the silicon steel strip, the elastic pressing structure (21) elastically presses the silicon steel strip downward and contracts to the hard pressing structure (22) to press the silicon steel strip.

6. The method for slitting silicon steel sheets for transformer core according to claim 1, wherein: When the shearing rolling grinding piece (4) slowly rotates to remove burrs, the shearing rolling grinding piece (4) has a vibration driving force in the axial direction, so that the shearing rolling grinding piece (4) produces a micro-displacement in the axial direction.

7. The method for slitting silicon steel sheets for transformer core according to claim 6, characterized in that: The shearing seam grinding member (4) is composed of a plurality of grinding columns (41) arranged coaxially and side by side; the cylindrical side surfaces of the grinding columns (41) are grinding surfaces densely covered with abrasives, and the grinding columns (41) correspond to the shearing seam structure.

8. The method for slitting silicon steel sheets for transformer core according to claim 1, characterized in that: The winding device (5) has a winding layer thickness detection unit. During the winding process, the elastic pressing piece (7) is gradually lifted by the corresponding lifting drive member (5.2) according to the thickness detection result of the winding layer thickness detection unit.

9. The method for slitting silicon steel sheets for transformer core according to claim 8, characterized in that: The elastic pressing piece (7) has mutually parallel and relatively fixed guide pieces (5.3), and the guide pieces (5.3) are located below the front end of the elastic pressing piece (7); the silicon steel strip in a descending conveying state is redirected around the guide pieces (5.3), so that the silicon steel strip is in a climbing posture between the guide pieces (5.3) and the strip portion of the elastic pressing piece (7).

10. The method for slitting silicon steel sheets for transformer core according to claim 1, characterized in that: A grinding device is provided between the rolling deburring device (3) and the winding device (5), and the rolled cut edge of the silicon steel strip is ground by the grinding device to remove the burrs hidden in the shear seam structure.

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