Automatic silicon steel sheet uncoiling and feeding device

Abstract

The invention relates to the technical field of material pretreatment, in particular to an automatic silicon steel sheet uncoiling and feeding device which comprises a supporting main machine, an expanding mechanism, a rolling mechanism and a movable supporting mechanism. After an operator hoists a silicon steel coil to the expanding mechanism, the silicon steel coil is fixedly uncoiled by the expanding mechanism and the supporting main machine, then the rolling mechanism is provided for reverse rolling and sending out, and when the number of subsequent wrapping turns is small, loosening is generated, and consequently the material is sunken, the movable supporting mechanism is used for supporting the sunken position, the subsequent material is prevented from being bent, and the use efficiency is improved. The device is simple in structure, effectively solves the problem that too many waste materials are fed at the tail end of the silicon steel sheet which is made of soft materials after being uncoiled, has good practicability and economical efficiency, and is beneficial to popularization and use of the device.

Description

Technical Field

[0001] The invention relates to the technical field of material pretreatment, and in particular to an automatic unwinding and feeding device for silicon steel sheets. Background Art

[0002] Metal coils are the main technical means of transporting metal plates. In the existing use of coils, they are usually uncoiled by an uncoiler and then transferred to a location near the processing equipment.

[0003] In the manufacturing process of power equipment, silicon steel coils are usually used for equipment material processing. Compared with traditional coil materials, silicon steel coils have lower hardness and are relatively simple to unwind. However, due to their insufficient hardness, the silicon steel plates located in the inner core of the coil are dispersed prematurely on the rollers of the traditional unwinding machine, causing part of the material to fall into the gap between the support rods of the unwinding machine. During transportation, the curved plate edges of the support rods are pulled and rubbed, causing the inner core to wrinkle, resulting in material waste and the inability to carry out continuous production, leading to shutdowns. At the same time, after the silicon steel is rolled up, it will affect the ductility of the silicon steel sheet, and it will naturally bend during processing, causing the stamping sheet to bend, affecting the service life of the power equipment. Summary of the invention

[0004] In order to solve the above problems existing in the prior art, the purpose of the present invention is to provide an automatic unwinding and loading device for silicon steel sheets which can effectively avoid wrinkles caused by friction between the end coil and the support rod, and at the same time avoid processing problems caused by natural bending of the silicon steel coil.

[0005] The technical solution adopted by the present invention is: an automatic unwinding and feeding device for silicon steel sheets, comprising:

[0006] A support mainframe, wherein a support bottom plate is provided below the support mainframe, an expansion mechanism is provided on the support mainframe, the expansion mechanism comprises a threaded rotating main shaft, one end of the threaded rotating main shaft is rotatably connected to the support mainframe, a plurality of arc-shaped plates are provided around the side of the threaded rotating main shaft, a main support block is provided in the middle of the threaded rotating main shaft, and a lifting assembly is provided between the arc-shaped plate and the main support block to assist the arc-shaped plate to be away from the threaded rotating main shaft;

[0007] A rolling mechanism, the rolling mechanism includes a protective cover, the protective cover is surrounded by the periphery of the plurality of arc plates, a plurality of rolling rollers are arranged between the protective cover and the arc plates, the plurality of rolling rollers are surrounded by the inner cavity of the protective cover, limiting rings are arranged at both ends of the plurality of rolling rollers, connecting plates are arranged on both sides of the rolling rollers, the connecting plates are fixedly connected to the limiting rings, a rotating motor is arranged on the connecting plates to drive the rolling rollers to rotate, and a cutting groove for assisting cutting and a roll-out groove for assisting material discharge are also arranged on the protective cover.

[0008] In one embodiment, the lifting assembly includes two groups of support rods, the two groups of support rods are hinged in the middle, a movable support plate is provided on the side of the arc plate close to the main support block, guide grooves are provided on both sides of the movable support plate, and sliding nails with sliding connections are provided in the guide grooves, one end of the two groups of sliding nails are connected to the sliding nails in turn, and one end of one of the support rods is hinged to the main support block.

[0009] In one embodiment, an adjustment rotating ring is also provided on the threaded rotating main shaft, and the adjustment rotating ring is rotatably connected to the threaded rotating main shaft. A support ring is provided on the outer side of the adjustment rotating ring, and the support ring is sleeved on the adjustment rotating ring. One end of the support rod in several of the jacking assemblies that is not connected to the main support block is hinged to the support ring.

[0010] In one embodiment, a plurality of sliding rails are provided on the support bottom plate, the rotating support rod is parallel to the threaded rotating main shaft, a support tube is provided at the end of the threaded rotating main shaft away from the support main body, a support groove is provided at the center of the support tube, a support column is provided on one of the sliding rails, a rotating roller is provided on the support column, a fixed support rod is provided on the rotating roller, and the support column drives the rotating roller to pass into the support tube after moving on the sliding rail.

[0011] In one embodiment, two groups of rotating support rods are provided on the outer side of the protective cover, and adjustment wheels are provided at both ends of the rotating support rods, the adjustment wheels abut against the outer side of the protective cover, and sliding support columns are provided at both ends of the rotating support rods, and the sliding support columns are slidably connected to the rotating support rods.

[0012] In one embodiment, a movable gear ring is provided at one end of the limiting ring away from the protective sleeve, and a plurality of driving motors are further provided on the protective sleeve. The driving motors are provided with meshing gears, and the meshing gears mesh with the movable gear ring.

[0013] In one embodiment, a movable support mechanism is also provided on the threaded rotating spindle, and the movable support mechanism includes a toggle wheel, and the toggle wheel is rotatably connected to the middle part of the threaded rotating spindle. A fixed block is also provided on the support tube, and a plurality of support rods are provided on the fixed block. One end of the support rod is hinged to the fixed block, and an elastic support rod is provided between the other end of the support rod and the toggle wheel.

[0014] In one embodiment, two ends of the elastic support rod are hinged to the driving wheel and the support rod.

[0015] In one embodiment, a limiting rod is provided on a side of the support rod away from the driving wheel, and the limiting rod abuts against the support rod to be tilted and fixed.

[0016] In one embodiment, a rotating wheel is provided on the supporting main body, and a plurality of supporting sliding rods are provided on the rotating wheel, and the supporting sliding rods are observed and slidably connected to the toggle wheel.

[0017] The beneficial effects of the present invention are as follows: the present invention is an automatic unwinding and feeding device for silicon steel sheets that effectively avoids wrinkles caused by the friction of the end coil on the support rod and avoids the natural bending of the silicon steel coil that causes processing problems. The specific implementation method is as follows;

[0018] The operator first hoists the steel coil and sleeves the curved plate, then rotates and adjusts the rotating ring to drive the support ring to move toward the supporting main machine, and at the same time drives the support rod on the support ring to clamp, and the sliding nails on the support rod slide in the movable support plate, pushing the curved plate against the inner side of the silicon steel coil to complete the fixation;

[0019] After that, the support column and the sliding support column are moved toward the support main machine until the support groove on the support tube is passed through by the fixed support rod on the rotating roller. After the rolling mechanism is sleeved with the silicon steel coil, the wrapped wire is separated by a mechanical arm or manually through the wire cutting groove. This method is an existing general technology and is not drawn in the attached drawings, so it will not be described in detail. After the silicon steel coil is freed from its restraint, the ends are separated, and then the rotating threaded rotating spindle is passed between the rolling rollers, and the adjusting wheel is rotated to drive the protective cover to rotate in the opposite direction of the silicon steel coil opening and winding, so that the silicon steel sheet passes through the rolling rollers and Between the inner cavities of the protective cover, the rotating motor assists the rolling roller to rotate, and rolls the silicon steel sheet in the reverse direction to maintain the straight state of the silicon steel sheet, so as to avoid bending of the silicon steel sheet fed out, which causes irregular stamping. At the same time, due to the different silicon content in the silicon steel sheet, the bending degree of the silicon steel sheet after unwinding is different. At this time, after starting the drive motor to rotate the movable gear ring that meshes with the meshing gear, the distance between the bending point of the silicon steel sheet and the rolling roller and the unwinding slot is adjusted to cope with the problem of different bending degrees of the silicon steel sheet. After that, the silicon steel sheet passing through the unwinding slot can be used directly.

[0020] Due to the characteristics of silicon steel, the strength of the silicon steel coil becomes lower after most of it is sent out, and it cannot maintain a circular state, causing part of it to be embedded between the arc plates and spread out prematurely. It can only be transported by pulling, and the uncoiler cannot provide power, which further causes it to bend inward when pulled, resulting in local wrinkles, making it unusable and affecting the subsequent stamping process; therefore, when the silicon steel coil is about to be sunken, the mass of the silicon steel coil is relatively small, and the rotating wheel drives the toggle wheel to move closer to the support rod. Due to the action of the limit rod, there is a distance between the support rod and the threaded rotating spindle. When the toggle wheel approaches, the rotating protrusion in the middle of the elastic support rod supports the silicon steel coil to prevent it from sinking in. After that, after the end of the silicon steel coil spreads out, it continues to drive the toggle wheel close to the elastic support rod. The elastic support rod spirally rotates beyond the gap of the arc plates, and the auxiliary silicon steel coil part remains between the limit rings. At the same time, the spirally rotating elastic support rod can effectively prevent the silicon steel coil from sinking in, and has a good supporting effect.

[0021] The equipment has a simple structure and utilizes a surrounding wheel set to reversely bend the silicon steel coil to avoid bending of the silicon steel sheet being fed out. At the same time, the bending distance can be adjusted to effectively solve the wrinkles caused by the friction between the end coil and the support rod. It has good practicality and economy, and is beneficial to the promotion and use of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0024] Figure 2 It is a schematic diagram of the segmented three-dimensional structure of the present invention;

[0025] Figure 3 It is a schematic diagram of the three-dimensional structure of the expansion mechanism of the present invention;

[0026] Figure 4 It is a schematic diagram of the three-dimensional structure of the movable supporting mechanism of the present invention;

[0027] Figure 5 It is a schematic diagram of the three-dimensional structure of the movable supporting mechanism of the present invention;

[0028] Figure 6 It is a schematic diagram of the three-dimensional structure of the movable supporting mechanism of the present invention.

[0029] Description of the drawings: 1. Supporting main machine; 2. Expansion mechanism; 21. Threaded rotating main shaft; 211. Support tube; 212. Support groove; 22. Main supporting block; 23. Arc plate; 24. Movable supporting plate; 241. Guide groove; 25. Support rod; 251. Sliding nail; 26. Support ring; 261. Adjusting rotating ring; 3. Rolling and spreading mechanism; 31. Protective cover; 301. Cutting groove; 302. Rolling groove; 311. Adjusting wheel; 312. Rotating support rod; 313. Sliding support Column; 32, supporting base plate; 321, sliding rail; 33, meshing gear; 331, driving motor; 34, movable gear ring; 35, supporting column; 351, rotating roller; 352, fixed support rod; 36, limiting ring; 37, rolling roller; 371, rotating motor; 372, connecting plate; 4, movable supporting mechanism; 41, rotating wheel; 411, supporting sliding rod; 42, toggle wheel; 43, elastic support rod; 44, bracket rod; 45, fixed block; 451, limiting rod. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0032] Combine the following Figure 1-6 The specific embodiment of the present invention is described, a silicon steel sheet automatic unwinding and feeding device comprises

[0033] Reference Figure 1 , 3 As shown, the support host 1 mainly provides support and power source, which is the existing technology, so it is not repeated here. A support bottom plate 32 is provided under the support host 1, and an expansion mechanism 2 is provided on the support host 1. The expansion mechanism 2 includes a threaded rotating spindle 21, and one end of the threaded rotating spindle 21 is rotatably connected to the support host 1. The support host 1 can drive the threaded rotating spindle 21 to rotate. A plurality of arc plates 23 are arranged around the side of the threaded rotating spindle 21, and the recess of the arc plate 23 is away from the threaded rotating spindle 21. The attached figure is provided with four groups. A main support block 22 is provided in the middle of the threaded rotating spindle 21, and a lifting component is provided between the arc plate 23 and the main support block 22 to assist the arc plate 23 to move away from the threaded rotating spindle 21; beneficially, the lifting component includes two groups of support rods 25, two The middle part of the group support rod 25 is hinged, presenting a scissor-shaped structure. A movable support plate 24 is provided on one side of the arc plate 23 close to the main support block 22, presenting an I-shaped structure. Guide grooves 241 are provided on both sides of the movable support plate 24. Sliding nails 251 that are slidably connected are provided in the guide grooves 241. One end of the two groups of sliding nails 251 is connected to the sliding nails 251 in sequence. One end of one support rod 25 is hinged to the main support block 22. An adjusting rotating ring 261 is also provided on the threaded rotating spindle 21. The adjusting rotating ring 261 is rotatably connected to the threaded rotating spindle 21. A support ring 26 is provided on the outer side of the adjusting rotating ring 261. The support ring 26 is sleeved on the adjusting rotating ring 261. One end of the support rod 25 that is not connected to the main support block 22 in several jacking assemblies is hinged to the support ring 26.

[0034] Reference Figure 2 , 6As shown, the rolling mechanism 3 includes a protective sleeve 31, the protective sleeve 31 surrounds the periphery of the plurality of arc-shaped plates 23, a plurality of rolling rollers 37 are arranged between the protective sleeve 31 and the arc-shaped plates 23, the plurality of rolling rollers 37 surround the inner cavity of the protective sleeve 31, and limiting rings 36 are arranged at both ends of the plurality of rolling rollers 37, connecting plates 372 are arranged at both sides of the rolling rollers 37, the connecting plates 372 are fixedly connected to the limiting rings 36, and a rotating motor 371 is arranged on the connecting plate 372 to drive the rolling rollers 37 to rotate, and a cutting groove 301 for assisting cutting and a roll-out groove 302 for assisting material discharging are also arranged on the protective sleeve 31. Advantageously, a movable tooth ring 34 is arranged at one end of the limiting ring 36 away from the protective sleeve 31, and a plurality of driving motors 331 are also arranged on the protective sleeve 31, and a meshing gear 33 is arranged on the driving motor 331, and the meshing gear 33 meshes with the movable tooth ring 34;

[0035] In practice, after the driving motor 331 is started to rotate the movable gear ring 34 meshing with the meshing gear 33 , the distance between the bending part of the silicon steel sheet at the rolling roller 37 and the unwinding groove 302 is adjusted.

[0036] Reference Figure 5 As shown, it is beneficial that a plurality of sliding rails 321 are provided on the support base plate 32, and both ends of the sliding rails 321 are fixed to the support base plate 32, and a rotating support rod 312 is parallel to the threaded rotating main shaft 21, and a support tube 211 is provided at the end of the threaded rotating main shaft 21 away from the supporting main unit 1, and a support groove 212 is provided at the center of the support tube 211, and a support column 35 is provided on one of the sliding rails 321, and a rotating roller 351 is provided on the support column 35, and a fixed support rod 35225 is provided on the rotating roller 351, and the support column 35 moves on the sliding rail 321 to drive the rotating roller 351 to pass into the support tube 211.

[0037] Advantageously, two sets of rotating support rods 312 are provided on the outer side of the protective cover 31, and adjustment wheels 311 are provided at both ends of the rotating support rods 312. The adjustment wheels 311 abut against the outer side of the protective cover 31 to support and adjust the protective cover 31, and sliding support columns 313 are provided at both ends of the rotating support rods 312. The sliding support columns 313 are slidably connected to the rotating support rods 312.

[0038] Reference Figure 4As shown, it is beneficial that a movable supporting mechanism 4 is also provided on the threaded rotating main shaft 21, and the movable supporting mechanism 4 includes a toggle wheel 42, and the toggle wheel 42 is rotatably connected to the middle part of the threaded rotating main shaft 21. A fixed block 45 is also provided on the support tube 211, and a plurality of support rods 44 are provided on the fixed block 45. One end of the support rod 44 is hinged to the fixed block 45, and an elastic supporting rod 43 is provided between the other end of the support rod 44 and the toggle wheel 42. Further, both ends of the elastic supporting rod 43 are hinged to the toggle wheel 42 and the support rod 44, and a limiting rod 451 is provided on the side of the support rod 44 away from the toggle wheel 42, and the limiting rod 451 is tilted and fixed against the support rod 44. Further, a rotating wheel 41 is provided on the supporting main body 1, and a plurality of supporting sliding rods 411 are provided on the rotating wheel 41, and the supporting sliding rod 411 is observed and slidably connected to the toggle wheel 42.

[0039] Working principle of the present invention:

[0040] The operator first hoists the steel coil and sleeves the curved plate 23, then rotates and adjusts the rotating ring 261 to drive the support ring 26 to move toward the supporting main machine 1, and at the same time drives the support rod 25 on the support ring 26 to clamp, and the sliding nail 251 on the support rod 25 slides in the movable support plate 24, pushing the curved plate 23 to abut against the inner side of the silicon steel coil to complete the fixation;

[0041] After that, the support column 35 and the sliding support column 313 are moved toward the support main machine 1 until the support groove 212 on the support tube 211 is passed through by the fixed support rod 35225 on the rotating roller 351. After the rolling mechanism 3 is sleeved with the silicon steel coil, the wrapped wire is separated by a mechanical arm or manually through the cutting groove 301. This method is an existing general technology and is not drawn in the accompanying drawings, so it is not repeated here. After the silicon steel coil loses its restraint, the ends are separated. After that, the rotating threaded rotating spindle 21 is passed between the rolling rollers 37, and the adjusting wheel 311 is rotated to drive the protective cover 31 to rotate in the opposite direction along the unwinding direction of the silicon steel coil, so that the silicon steel sheet passes into the rolling mechanism 3. Between the spreading roller 37 and the inner cavity of the protective cover 31, the rotating motor 371 assists the rolling roller 37 to rotate, reversely rolls the silicon steel sheet, maintains the straight state of the silicon steel sheet, and avoids the bending of the silicon steel sheet fed out, which causes irregular stamping. At the same time, due to the different silicon content in the silicon steel sheet, the bending degree of the silicon steel sheet after unwinding is different. At this time, after starting the driving motor 331 to rotate the movable gear ring 34 that meshes with the meshing gear 33, adjust the distance between the bending point of the silicon steel sheet at the spreading roller 37 and the unwinding groove 302, so as to cope with the problem of different bending degrees of the silicon steel sheet, and then the silicon steel sheet passing through the unwinding groove 302 can be used directly.

[0042] Due to the characteristics of silicon steel, the strength of the silicon steel coil becomes low after most of it is sent out, and it cannot maintain a circular state, causing part of it to be embedded between the arc plates 23 and to be scattered in advance. It can only be transported by pulling, and the unwinding machine cannot provide power, which further causes it to bend inward during pulling, resulting in local wrinkles, making it unusable and affecting the subsequent stamping process; therefore, when the silicon steel coil is about to bend inward, the mass of the silicon steel coil is less, and the rotating wheel 41 drives the toggle wheel 42 to move closer to the bracket rod 44. Due to the limit rod 451 There is a distance between the support rod 44 and the threaded rotating main shaft 21. When the toggle wheel 42 approaches, the middle rotating protrusion of the elastic support rod 43 supports the silicon steel coil to prevent it from sinking. Then, after the end of the silicon steel coil spreads out, it continues to drive the toggle wheel 42 to approach the elastic support rod 43. The elastic support rod 43 spirally rotates beyond the gap of the arc plate 23, and the auxiliary silicon steel coil part remains between the limit rings 36. At the same time, the spirally rotating elastic support rod 43 can effectively prevent the silicon steel coil from sinking in, and has a good supporting effect.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it 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 an indirect connection 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.

[0044] The above contents are merely examples and explanations of the structure of the present invention. The technical personnel in the technical field of the present invention may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. An automatic unwinding and feeding device for silicon steel sheets, characterized in that: include A support main unit (1), wherein a support bottom plate (32) is provided below the support main unit (1), an expansion mechanism (2) is provided on the support main unit (1), and the expansion mechanism (2) comprises a threaded rotating main shaft (21), one end of the threaded rotating main shaft (21) is rotatably connected to the support main unit (1), a plurality of arc-shaped plates (23) are provided around the side of the threaded rotating main shaft (21), a main support block (22) is provided in the middle of the threaded rotating main shaft (21), and a lifting assembly is provided between the arc-shaped plate (23) and the main support block (22) to assist the arc-shaped plate (23) to be away from the threaded rotating main shaft (21); A rolling mechanism (3), the rolling mechanism (3) comprising a protective sleeve (31), the protective sleeve (31) surrounding the periphery of the plurality of arc-shaped plates (23), a plurality of rolling rollers (37) being arranged between the protective sleeve (31) and the arc-shaped plates (23), the plurality of rolling rollers (37) surrounding the inner cavity of the protective sleeve (31), limiting rings (36) being arranged at both ends of the plurality of rolling rollers (37), connecting plates (372) being arranged on both sides of the rolling rollers (37), the connecting plates (372) being fixedly connected to the limiting rings (36), a rotating motor (371) being arranged on the connecting plates (372) for driving the rolling rollers (37) to rotate, and a cutting groove (301) for assisting cutting and a roll-out groove (302) for assisting material discharging being also arranged on the protective sleeve (31).

2. The automatic unwinding and feeding device for silicon steel sheets according to claim 1 is characterized in that: The lifting assembly comprises two groups of support rods (25), the two groups of support rods (25) are hinged in the middle, a movable support plate (24) is provided on one side of the arc plate (23) close to the main support block (22), guide grooves (241) are provided on both sides of the movable support plate (24), and sliding pins (251) are slidably connected in the guide grooves (241), one end of the two groups of sliding pins (251) are connected to the sliding pins (251) in sequence, and one end of one of the support rods (25) is hinged to the main support block (22).

3. The automatic unwinding and feeding device for silicon steel sheets according to claim 2 is characterized in that: The threaded rotating main shaft (21) is also provided with an adjusting rotating ring (261), the adjusting rotating ring (261) is rotatably connected to the threaded rotating main shaft (21), a supporting ring (26) is provided on the outer side of the adjusting rotating ring (261), the supporting ring (26) is sleeved on the adjusting rotating ring (261), and one end of the supporting rod (25) in the plurality of the lifting assemblies that is not connected to the main supporting block (22) is hinged to the supporting ring (26).

4. The automatic unwinding and feeding device for silicon steel sheets according to claim 1 is characterized in that: The support base plate (32) is provided with a plurality of sliding rails (321), the rotating support rod (312) is parallel to the threaded rotating main shaft (21), a support tube (211) is provided at one end of the threaded rotating main shaft (21) away from the support main unit (1), a support groove (212) is provided at the center of the support tube (211), one of the sliding rails (321) is provided with a supporting column (35), a rotating roller (351) is provided on the supporting column (35), a fixed supporting rod (352)(25) is provided on the rotating roller (351), and the supporting column (35) moves on the sliding rail (321) to drive the rotating roller (351) to pass into the support tube (211).

5. The automatic unwinding and feeding device for silicon steel sheets according to claim 4 is characterized in that: Two groups of rotating support rods (312) are provided on the outer side of the protective sleeve (31), and adjusting wheels (311) are provided at both ends of the rotating support rods (312). The adjusting wheels (311) abut against the outer side of the protective sleeve (31), and sliding support columns (313) are provided at both ends of the rotating support rods (312). The sliding support columns (313) are slidably connected to the rotating support rods (312).

6. The automatic unwinding and feeding device for silicon steel sheets according to claim 1 is characterized in that: A movable toothed ring (34) is provided at one end of the limiting ring (36) away from the protective sleeve (31); a plurality of driving motors (331) are also provided on the protective sleeve (31); a meshing gear (33) is provided on the driving motor (331); and the meshing gear (33) meshes with the movable toothed ring (34).

7. The automatic unwinding and feeding device for silicon steel sheets according to claim 4 is characterized in that: The threaded rotating main shaft (21) is also provided with a movable support mechanism (4), and the movable support mechanism (4) includes a toggle wheel (42), and the toggle wheel (42) is rotatably connected to the middle part of the threaded rotating main shaft (21). The support tube (211) is also provided with a fixed block (45), and the fixed block (45) is provided with a plurality of support rods (44), one end of the support rod (44) is hinged to the fixed block (45), and an elastic support rod (43) is provided between the other end of the support rod (44) and the toggle wheel (42).

8. The automatic unwinding and feeding device for silicon steel sheets according to claim 7 is characterized in that: The two ends of the elastic support rod (43) are hinged to the driving wheel (42) and the support rod (44).

9. The automatic unwinding and feeding device for silicon steel sheets according to claim 7, characterized in that: A limiting rod (451) is provided on one side of the support rod (44) away from the shifting wheel (42), and the limiting rod (451) abuts against the support rod (44) to be tilted and fixed.

10. The automatic unwinding and feeding device for silicon steel sheets according to claim 7, characterized in that: The supporting mainframe (1) is provided with a rotating wheel (41), and the rotating wheel (41) is provided with a plurality of supporting sliding rods (411), and the supporting sliding rods (411) are connected to and slidably connected to the toggle wheel (42).

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