Strip hole punching equipment for center pillar sheet type silicon steel sheet

Abstract

The invention relates to strip hole punching equipment for a center pillar sheet type silicon steel sheet, which comprises a workbench for placing the center pillar sheet type silicon steel sheet, a rack is arranged above the workbench, and two first blades and a second blade positioned between the two first blades are arranged on the rack; a driving mechanism is further arranged on the rack and used for driving the two first blades and the second blade to ascend and descend, and the driving mechanism is further used for sliding in the direction parallel to the length direction of the workbench after the second blade descends to penetrate through the center pillar sheet type silicon steel sheet on the workbench. The first blade is used for penetrating through the center pillar sheet type silicon steel sheet on the workbench in the lifting process to form an arc-shaped hole, and the second blade is used for forming a middle strip-shaped hole in the center pillar sheet type silicon steel sheet in the process of descending, penetrating through the center pillar sheet type silicon steel sheet on the workbench and sliding in the direction parallel to the length direction of the workbench. The middle strip-shaped hole is communicated with the arc-shaped hole; the strip-shaped hole punching device has the effect of improving the strip-shaped hole punching efficiency of the center column sheet type silicon steel sheet.

Description

Technical Field

[0001] The present application relates to the technical field of silicon steel sheet processing, and in particular to a punching hole device for a center column type silicon steel sheet. Background Art

[0002] Silicon steel sheets are essential components for transformers, motors and generators, and are mainly used to make iron cores. Silicon steel sheets are a soft magnetic alloy of ferrosilicon with extremely low carbon content. In order to be able to piece together silicon steel sheets to form the shape of the iron core, and to facilitate the bundling and fixing of the assembled silicon steel sheets by wire harnesses, the silicon steel sheets need to be sliced ​​during the processing, such as punching the silicon steel sheets into different sheet shapes (such as center column sheet shapes), and punching holes in silicon steel sheets of different sheet shapes (such as punching round holes or punching strip holes).

[0003] Existing punching equipment for punching center column-shaped silicon steel sheets generally includes a blade and a lifting member (such as a cylinder) for driving the blade to move up and down; the blade is driven to press against and penetrate the silicon steel sheet by driving the cylinder to move up and down, thereby achieving punching of the silicon steel sheet; if the hole type to be punched is a strip hole opened along the length direction of the silicon steel sheet, and the blade length is smaller than the length of the strip hole to be punched, then it is generally necessary to add a moving component to drive the blade and the lifting member to move along the length direction of the silicon steel sheet, and the strip hole is punched by punching while moving.

[0004] With respect to the above-mentioned related technologies, if the end wall of the strip hole to be punched is in the shape of an arc, then it is generally necessary to configure a blade with an arc portion at the end that is compatible with the strip hole. When the length of the strip hole with an arc-shaped end wall to be punched is much longer than the length of the blade, it is necessary to use the above-mentioned structure to drive the blade to move intermittently along the length direction of the silicon steel sheet and drive the blade to rise and fall for punching during each intermittent pause. Multiple punching operations are required to finally form a strip hole. This punching method easily leads to low punching efficiency of the silicon steel sheet, so it needs to be improved. Summary of the invention

[0005] In order to improve the efficiency of punching strip holes in center column type silicon steel sheets, the present application provides a strip hole punching device for center column type silicon steel sheets.

[0006] The present application provides a punching device for a central column type silicon steel sheet, which adopts the following technical solution: A device for punching holes in a center column type silicon steel sheet, comprising a workbench for placing the center column type silicon steel sheet, a frame being provided above the workbench, and two first blades and a second blade located between the two first blades being provided on the frame; a driving mechanism being also provided on the frame, and the driving mechanism being used to drive the two first blades and the second blade to rise and fall, and the driving mechanism being used to slide in a direction parallel to the length direction of the workbench after the second blade descends to penetrate the center column type silicon steel sheet on the workbench, the first blade being used to penetrate the center column type silicon steel sheet on the workbench to form an arc hole during the lifting process, and the second blade being used to form a middle strip hole in the center column type silicon steel sheet during the process of descending and penetrating the center column type silicon steel sheet on the workbench and sliding in a direction parallel to the length direction of the workbench, the middle strip hole being connected to the arc hole, and the arc hole and the middle strip hole are combined to form a strip hole.

[0007] By adopting the above-mentioned technical solution, the first blade and the second blade are integrated to cooperate with each other to punch out a strip hole, and the second blade of the present application first punches downward, and then slides on the basis of the through hole obtained by the downward punching, thereby quickly forming a middle strip hole connected to the arc hole. Compared with the traditional intermittent movement and reciprocating lifting blade punching operation, the punching method of the present application is more efficient and the speed of punching out the strip hole is faster.

[0008] Preferably, the driving mechanism comprises a lifting assembly and a sliding assembly, the sliding assembly is used to drive the second blade to slide along a direction parallel to the length direction of the workbench, the lifting assembly comprises a lifting member, a first lifting frame plate, a first rack, a second lifting frame, a second rack, a docking gear and a telescopic member; the lifting member is connected to the frame, the driving end of the lifting member is connected to the first lifting plate, the first rack and the first blade are both arranged on the first lifting plate; the lifting member is used to drive the first lifting plate to rise and fall; The second lifting plate is connected to the frame through a telescopic member, the second blade and the second rack are connected to the second lifting plate, and the telescopic direction of the telescopic member is parallel to the lifting direction of the first blade and the second blade; the docking gear is rotatably connected to the frame, and the first rack and the second rack are both meshed with the docking gear; the length directions of the first rack and the second rack are parallel to the telescopic direction of the telescopic member.

[0009] By adopting the above technical solution, the first lifting plate and the first blade on the first lifting plate are driven to be lifted and lowered by the lifting member, and in the process of lifting and lowering the first lifting plate based on the first rack, the second rack and the docking gear, the second lifting plate and the second blade on the second lifting plate are also lifted and lowered, and the lifting directions of the first blade and the second blade are opposite, thereby realizing the first blade and the second blade alternately cutting the center column sheet-shaped silicon steel sheet on the workbench.

[0010] Preferably, the arc-shaped hole includes an arc-shaped end hole and a feed hole. The first blade is used to penetrate the middle column-type silicon steel sheet on the workbench during the descending process to form an arc-shaped end hole. The feed assembly is also included. The feed assembly is used to open a feed hole connected to the arc-shaped end hole along the length direction of the workbench when the first blade penetrates the middle column-type silicon steel sheet on the workbench. The feed hole is located between the arc-shaped end holes formed by the two first blades and is used to be connected to the middle strip hole. The feed hole, the arc-shaped end hole and the middle strip hole together form a strip hole.

[0011] By adopting the above technical solution, in the process of using the first blade to cut out the arc-shaped end hole of the center column-shaped silicon steel sheet, the feed component can be further extended and cut on the basis of the arc-shaped end hole to obtain the feed hole. The opening of the feed hole can reduce the sliding stroke of the second blade and further improve the completion cutting speed of the strip hole.

[0012] Preferably, the feed assembly includes an extension blade, a limiting torsion spring, a linkage gear, a rotating shaft, and a linkage rack; the end of the extension blade is connected to the rotating shaft, the rotating shaft is rotatably connected to the side wall of the first blade, the limiting torsion spring is sleeved on the rotating shaft, and one end of the limiting torsion spring is connected to the rotating shaft, and the other end is connected to the first blade, and the linkage gear is sleeved on the rotating shaft; the linkage rack is connected to the frame, and the linkage gear is used to engage with the linkage rack during the downward movement of the first lifting plate, so that the extension blade rotates and penetrates the center column sheet-type silicon steel sheet on the workbench, and the limiting torsion spring is deformed.

[0013] By adopting the above technical solution, when the first blade moves downward and punches the center column silicon steel sheet to obtain an arc-shaped end hole, the linkage gear meshes with the linkage rack fixed on the frame as the first blade moves downward, and rotates under the transmission action of the linkage rack, so that the extended blade rotates in the direction away from the first blade and penetrates the center column silicon steel sheet on the workbench, thereby cutting out the feed hole. When the first blade moves upward to make the linkage gear disengage from the linkage rack, the extended blade will reverse and reset under the drive of the limiting torsion spring.

[0014] Preferably, the sliding assembly includes a sliding plate and a sliding member for driving the sliding plate to slide in a direction parallel to the length of the workbench, and the second blade is slidably connected to the sliding plate. The sliding of the second blade relative to the sliding plate ensures that the second blade is not in the rotation path of the extended blade during the rotation of the extended blade.

[0015] By adopting the above technical solution, the sliding of the second blade relative to the sliding plate can ensure that the second blade is not in the rotation path of the extending blade during the rotation of the extending blade, thereby preventing the second blade from hindering the rotation of the extending blade.

[0016] Preferably, the shortest distance between the sliding plate and the first lifting plate satisfies: the second blade is not on the moving path of the extending blade; and an offset component is also included, which is used to offset a specified distance in the direction close to the second blade during the downward movement of the second blade, so that the punching position of the center column-type silicon steel sheet by the offset second blade and the punching position of the center column-type silicon steel sheet by the extending blade have an overlapping area.

[0017] By adopting the above technical scheme, the present application defines the shortest distance between the sliding plate and the first lifting plate, that is, the initial position of the second blade when it does not slide with the sliding plate is not on the moving path of the extension blade, thereby avoiding the second blade from hindering the rotation of the extension blade; in addition, the present application also provides an offset component, which uses the offset component to drive the second blade to approach the second blade during the downward movement, so that the initial punching position of the second blade on the center column sheet type silicon steel sheet and the punching position of the extension blade on the center column sheet type silicon steel sheet (that is, the extension hole) have an overlapping area, thereby avoiding the silicon steel sheet at the punching intersection of the extension blade and the second blade from being completely punched off, avoiding the situation where the silicon steel sheet at the intersection is adhered and not fully punched, and optimizing the punching effect and punching quality.

[0018] Preferably, the offset assembly includes a limit rod, a docking protrusion and a limit spring, the limit rod is connected to the frame, the second blade is slidably connected to the sliding plate through the limit spring, the docking protrusion is arranged on the second blade, and when the second lifting plate is not moved downward, the docking protrusion abuts against the side wall of the limit rod under the action of the elastic force of the limit spring, and the docking protrusion is used to disengage from the abutment of the limit rod during the downward movement of the second lifting plate, and drive the second blade to deviate in the direction close to the first blade under the action of the elastic force of the limit spring.

[0019] By adopting the above technical solution, the limiting effect of the limiting rod is used to prevent the second blade from being located on the rotation path of the extended blade. When the second blade moves downward and the docking protrusion is separated from the limiting rod, the elastic force of the limiting spring is used to drive the second blade to be offset in the direction close to the first blade.

[0020] Preferably, a first pad is provided on the workbench and below the first blade and the extended blade, a give-way spring is commonly connected between the first pad and the workbench, the first pad is slidably connected to the workbench via the give-way spring, and the sliding direction of the first pad is parallel to the lifting direction of the first blade; a connecting frame is provided on the side wall of the second blade, a second pad is connected to the other end of the connecting frame, the second pad is located below the second blade, and the first pad and the second pad are both used to support the center column sheet-type silicon steel sheet.

[0021] By adopting the above technical solution, the setting of the second pad and the second pad can support the middle column type silicon steel sheet during the process of the first blade, the extension blade and the second blade punching the middle column type silicon steel sheet, thereby improving the smoothness of punching and making way for the first blade and the extension blade.

[0022] Preferably, the side walls of the first lifting plate and the second lifting plate are both provided with a pressing plate, and the pressing plate is used to press against the upper surface of the middle column sheet-shaped silicon steel sheet on the workbench when the first lifting plate or the second lifting plate descends.

[0023] By adopting the above technical solution, a pressure plate is used to press against the upper surface of the center column type silicon steel sheet to achieve the positioning of the center column type silicon steel sheet, reduce the movement offset of the center column type silicon steel sheet relative to the workbench, and ensure the punching accuracy of the center column type silicon steel sheet by the first blade and the second blade.

[0024] Preferably, a flexible pad is provided on one side surface of the pressing plate facing the workbench, and the flexible pad is used to contact the surface of the middle column sheet-shaped silicon steel sheet on the workbench.

[0025] By adopting the above technical scheme, the setting of the flexible pad increases the contact area between the pressure plate and the upper surface of the center column type silicon steel sheet, further improves the pressing and positioning effect of the center column type silicon steel sheet, reduces the movement offset of the center column type silicon steel sheet relative to the workbench, and ensures the punching accuracy of the first blade and the second blade on the center column type silicon steel sheet.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The first blade and the second blade are integrated to cooperate with each other to punch and form a strip hole, and the second blade of the present application punches downward first, and then slides on the basis of the through hole obtained by the downward punching, so as to quickly form a middle strip hole connected to the arc hole. Compared with the traditional intermittent movement and reciprocating lifting blade punching operation, the punching method of the present application is more efficient and the speed of punching to obtain the strip hole is faster; 2. The first lifting plate and the first blade on the first lifting plate are driven to be lifted and lowered by the lifting member, and the second lifting plate and the second blade on the second lifting plate are also lifted and lowered based on the first rack, the second rack and the docking gear. The lifting directions of the first blade and the second blade are opposite, thereby realizing the first blade and the second blade alternately cutting the center column sheet-shaped silicon steel sheet on the workbench. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a punching hole device for a center column type silicon steel sheet disclosed in an embodiment of the present application.

[0028] Figure 2It is a cross-sectional view of an embodiment of the present application for illustrating the connection relationship between the first blade, the second blade and the rack.

[0029] Figure 3 It is a schematic diagram used to illustrate the arc-shaped hole formed by the first blade punching the center column-type silicon steel sheet in the embodiment of the present application, and the strip-shaped hole structure finally formed by the center column-type silicon steel sheet.

[0030] Figure 4 Figure 2 A magnified schematic diagram of center A.

[0031] Figure 5 It is a cross-sectional view of an embodiment of the present application for illustrating the connection relationship between the second blade and the second pad.

[0032] Figure 6 It is a schematic diagram for illustrating the positional relationship and connection relationship between the extension blade and the first blade according to an embodiment of the present application.

[0033] Description of the accompanying drawings: 1. workbench; 11. first pad; 12. second pad; 121. limit plate; 13. give way spring; 14. connecting frame; 2. frame; 3. first blade; 4. second blade; 5. driving mechanism; 51. sliding assembly; 511. sliding plate; 512. sliding member; 52. lifting assembly; 521. lifting member; 522. first lifting plate; 523. first rack; 524. second lifting plate; 525. second rack; 526. docking gear Wheel; 527, telescopic part; 528, pressure plate; 529, flexible pad; 53, offset assembly; 531, limit rod; 532, docking protrusion; 533, limit spring; 54, feed assembly; 541, extension blade; 542, limit torsion spring; 543, linkage gear; 544, rotating shaft; 545, linkage rack; 6, middle column sheet silicon steel sheet; 61, strip hole; 611, arc hole; 6111, arc end hole; 6112, feed hole; 612, middle strip hole. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-6 This application is described in further detail.

[0035] The present application embodiment discloses a punching device for a central column type silicon steel sheet. Figure 1 , Figure 2 and Figure 3The punching hole equipment for the middle column type silicon steel sheet comprises a workbench 1 for placing the middle column type silicon steel sheet 6, a frame 2 is arranged above the workbench 1, and the frame 2 is arranged along the length direction of the workbench 1. The frame 2 is provided with two first blades 3 and a second blade 4 located between the two first blades 3. One of the first blades 3, the second blade 4, and the other first blade 3 are sequentially distributed along the length direction of the frame 2. The frame 2 is also provided with a driving mechanism 5, which is used to drive the two first blades 3 and the second blade 4 to rise and fall, and is also used to drive the second blade 4 to slide in a direction parallel to the length direction of the workbench 1, so that the first blade 3 penetrates the middle column sheet silicon steel sheet 6 on the workbench 1 during the descent process, and punches out an arc hole 611 on the surface of the middle column sheet silicon steel sheet 6, and the second blade 4 is used to penetrate the middle column sheet silicon steel sheet 6 on the workbench 1 and slide along the length direction of the workbench 1 when descending, so as to punch out a middle strip hole 612 on the surface of the middle column sheet silicon steel sheet 6, and the arc hole 611 is connected with the middle strip hole 612 to form a strip hole 61. The frame 2 of the present application can be several, and the several frames 2 are distributed along the width direction of the workbench 1, so that the above-mentioned structures on the several frames 2 can punch out a plurality of strip holes 61 on the middle column sheet silicon steel sheet 6.

[0036] Reference Figure 2 The driving mechanism 5 includes a lifting assembly 52 and a sliding assembly 51. The lifting assembly 52 includes a lifting member 521, a first lifting plate 522, a first rack 523, a second lifting plate 524, a second rack 525, a docking gear 526 and a telescopic member 527. The lifting member 521 can be a motor screw rod combination structure. The driving end of the lifting member 521 is connected to the first lifting plate 522. The first rack 523 and the two first blades 3 are connected to the first lifting plate 522. The telescopic member 527 can be a telescopic sleeve. One end of the telescopic member 527 is connected to the second lifting plate 524, and the other end is connected to the second lifting plate 524. The second rack 525 and the second blade 4 are connected to the second lifting plate 524. The first rack 523 and the second rack 525 are both meshed with the docking gear 526, and the docking gear 526 is rotatably connected to the frame 2.

[0037] Reference Figure 2 , Figure 4 and Figure 5The sliding assembly 51 includes a sliding plate 511 and a sliding member 512. The sliding plate 511 is slidingly connected to the second lifting plate 524. The sliding member 512 can be a combination of a motor and a screw rod, so as to drive the sliding plate 511 to slide back and forth along the length direction of the second lifting plate 524. The sliding assembly 51 also includes an offset assembly 53. The offset assembly 53 includes a limit rod 531, a docking protrusion 532 and a limit spring 533. The limit rod 531 is connected to the frame 2, and the docking protrusion 532 is connected to the second blade 4. The second blade 4 is slidingly connected to the sliding plate 511 through the limit spring 533. The sliding direction of the second blade 4 relative to the sliding plate 511 and the sliding direction of the sliding plate 511 relative to the second lifting plate 524 are parallel to each other. When the second lifting plate 524 has not moved downward, the docking protrusion 532 abuts against the side wall of the limiting rod 531 under the elastic force of the limiting spring 533. When the second lifting plate 524 moves downward so that the docking protrusion 532 is out of contact with the limiting rod 531, the limiting rod 531 drives the second blade 4 to be offset a specified distance relative to the sliding plate 511 in the direction close to the first blade 3 under the elastic force of the limiting spring 533.

[0038] Reference Figure 2 , Figure 3 and Figure 5 The arc hole 611 includes an arc end hole 6111 and a feed hole 6112. The first blade 3 is used to penetrate the middle column silicon steel sheet 6 on the workbench 1 during the process of descending along the vertical direction with the first lifting plate 522, and to open the arc end hole 6111 on the middle column silicon steel sheet 6. The feeding assembly 54 is also included. The feeding assembly 54 is used to penetrate the surface of the middle column silicon steel sheet 6 to form the feed hole 6112 during the process of the first blade 3 moving downward to penetrate the middle column silicon steel sheet 6.

[0039] Specifically, the feeding assembly 54 includes an extension blade 541, a limiting torsion spring 542, a linkage gear 543, a rotating shaft 544, and a linkage rack 545. The extension blade 541 is arranged in one-to-one correspondence with the first blade 3, the end wall of the extension blade 541 is connected to the rotating shaft 544, the rotating shaft 544 is rotatably connected to one side of the first blade 3, the limiting torsion spring 542 is sleeved on the rotating shaft 544, one end of the limiting torsion spring 542 is fixedly connected to the side wall of the rotating shaft 544, and the other end is fixedly connected to the side wall of the first blade 3. In this embodiment, when the limiting torsion spring 542 is not deformed, the extension blade 541 is attached to the side wall of the first blade 3. The linkage gear 543 is fixedly sleeved on the rotating shaft 544, the linkage rack 545 is arranged in a one-to-one correspondence with the linkage gear 543, the linkage rack 545 is connected to the frame 2, and the linkage gear 543 is used to engage with the linkage rack 545 in the process of moving downward with the first blade 3, and make the extended blade 541 rotate in the direction away from the first blade 3, and make the limiting torsion spring 542 deform, and the rotation angle of the first blade 3 satisfies: the first blade 3 can rotate and penetrate the middle column sheet silicon steel sheet 6 to form a feed hole 6112, and the feed hole 6112 is located on the extension line of the length direction of the arc end hole 6111, and is connected to the arc end hole 6111. It should be noted that when the docking protrusion 532 conflicts with the limiting rod 531, the second blade 4 is not on the rotation path of the extending blade 541. When the docking protrusion 532 is separated from the limiting rod 531 and the second blade 4 is offset toward the first blade 3 under the elastic force of the limiting spring 533, the offset second blade 4 moves downward and penetrates the punching position of the column-shaped silicon steel sheet 6, and there is an overlapping area with the feed hole 6112.

[0040] Reference Figure 2 , Figure 4 and Figure 5 , a first pad 11 is provided on the workbench 1 and below the first blade 3 and the extension blade 541, a yield spring 13 is connected between the first pad 11 and the workbench 1, the first pad 11 is connected to the workbench 1 by the yield spring 13, and the lifting direction of the first pad 11 is parallel to the lifting direction of the first blade 3, a connecting frame 14 is provided on the side wall of the second blade 4, the connecting frame 14 is a telescopic sleeve with a spring, and the other end of the connecting frame 14 is connected to the second pad 12, the second pad 12 is located below the second blade 4, and the first pad 11 and the second pad 12 are both used to support the middle column sheet silicon steel sheet 6, that is, they fit the lower surface of the middle column sheet silicon steel sheet 6 on the workbench 1. A limit plate 121 is fixedly connected to the workbench 1 to prevent the second pad 12 from moving downward.

[0041] The side walls of the first lifting plate 522 and the second lifting plate 524 are both provided with a pressing plate 528. A flexible pad 529 is provided on the side surface of the pressing plate 528 facing the workbench 1. The flexible pad 529 can be made of rubber. The pressing plate 528 is used to press against the upper surface of the middle column sheet type silicon steel sheet 6 on the workbench 1 as the first lifting plate 522 or the second lifting plate 524 rises and falls when the first lifting plate 522 or the second lifting plate 524 descends, so that the flexible pad 529 is in conflict with the surface of the middle column sheet type silicon steel sheet 6.

[0042] The implementation principle of the punching hole device for the center column type of silicon steel sheet in the embodiment of the present application is as follows: place the center column type silicon steel sheet 6 on the workbench 1, and make the length direction of the center column type silicon steel sheet 6 parallel to the length direction of the workbench 1. The first lifting plate 522 is driven downward by the lifting member 521 to penetrate the center column type silicon steel sheet 6 through the two first blades 3 located at the end and punch out an arc-shaped end hole 6111 on the center column type silicon steel sheet 6. During this process, the second blade 4 will move upward with the second lifting member 521 driven by the first rack 523, the docking gear 526 and the second rack 525. At the same time, the extension blade 541 rotates with the downward movement of the first blade 3 and punches out a feed hole 6112 on the surface of the center column type silicon steel sheet 6 that is connected to the arc-shaped end hole 6111. Then the lifting member 521 drives the first blade 3 to move upward, and the extension blade 541 drives the first blade 3 to move upward, and the extension blade 541 drives the second ... 1 is rotated and reset, and the second blade 4 moves down, and in the process of moving down, it is driven by the offset component 53 to deviate in the direction close to the first blade 3, so that the offset second blade 4 moves down to penetrate the middle column sheet silicon steel sheet 6, and then the sliding plate 511 is driven by the sliding component 51 to slide along the length direction of the second lifting plate 524, so that the second blade 4 and the second pad 12 cooperate with each other in the sliding process to penetrate the middle column sheet silicon steel sheet 6 along the length direction of the middle column sheet silicon steel sheet 6 to form a middle strip hole 612, until the middle strip hole 612 is connected with the arc hole 611 at the other end, the sliding stops, and the punching of the strip hole 61 is finally completed.

[0043] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A punching device for a central column type silicon steel sheet, characterized in that: The invention comprises a workbench (1) for placing a central column-shaped silicon steel sheet (6), a frame (2) being provided above the workbench (1), two first blades (3) and a second blade (4) located between the two first blades (3) being provided on the frame (2); a driving mechanism (5) being provided on the frame (2), the driving mechanism (5) being used to drive the two first blades (3) and the second blade (4) to rise and fall, the driving mechanism (5) being used to drive the second blade (4) to rise and fall when the second blade (4) descends to a position where the rear edge of the central column-shaped silicon steel sheet (6) passing through the workbench (1) is parallel to the length direction of the workbench (1). The first blade (3) is used to penetrate the middle column-shaped silicon steel sheet (6) on the workbench (1) to form an arc-shaped hole (611) during the lifting process, and the second blade (4) is used to form a middle strip hole (612) on the middle column-shaped silicon steel sheet (6) during the process of descending and penetrating the middle column-shaped silicon steel sheet (6) on the workbench (1) and sliding in a direction parallel to the length direction of the workbench (1), wherein the middle strip hole (612) is connected to the arc-shaped hole (611), and the arc-shaped hole (611) and the middle strip hole (612) are combined to form a strip hole (61).

2. The punching hole equipment for the center column type silicon steel sheet according to claim 1 is characterized in that: The driving mechanism (5) comprises a lifting component (52) and a sliding component (51); the sliding component (51) is used to drive the second blade (4) to slide along a direction parallel to the length direction of the workbench (1); the lifting component (52) comprises a lifting member (521), a first lifting frame plate, a first rack (523), a second lifting frame, a second rack (525), a docking gear (526) and a telescopic member (527); the lifting member (521) is connected to the frame (2); the driving end of the lifting member (521) is connected to the first lifting plate (522); the first rack (523) and the first blade (3) are both arranged on the first lifting plate (522); the lifting member (521) is used to drive the first lifting plate (522) to rise and fall; The second lifting plate (524) is connected to the frame (2) through a telescopic member (527); the second blade (4) and the second rack (525) are connected to the second lifting plate (524); the telescopic direction of the telescopic member (527) is parallel to the lifting direction of the first blade (3) and the second blade (4); the docking gear (526) is rotatably connected to the frame (2); the first rack (523) and the second rack (525) are both meshed with the docking gear (526); the length directions of the first rack (523) and the second rack (525) are both parallel to the telescopic direction of the telescopic member (527).

3. The punching hole equipment for the center column type silicon steel sheet according to claim 2 is characterized in that: The arc-shaped hole (611) comprises an arc-shaped end hole (6111) and a feed hole (6112); the first blade (3) is used to penetrate the middle column-shaped silicon steel sheet (6) on the workbench (1) during the descending process to form the arc-shaped end hole (6111); and the feed component (54) is used to open a feed hole (6112) connected to the arc-shaped end hole (6111) along the length direction of the workbench (1) when the first blade (3) penetrates the middle column-shaped silicon steel sheet (6) on the workbench (1); the feed hole (6112) is located between the arc-shaped end holes (6111) formed by the two first blades (3) and is used to be connected to the middle strip hole (612); the feed hole (6112), the arc-shaped end hole (6111) and the middle strip hole (612) together form the strip hole (61).

4. The punching hole equipment for the center column type silicon steel sheet according to claim 3 is characterized in that: The feeding assembly (54) comprises an extending blade (541), a limiting torsion spring (542), a linkage gear (543), a rotating shaft (544), and a linkage rack (545); the end of the extending blade (541) is connected to the rotating shaft (544), the rotating shaft (544) is rotatably connected to the side wall of the first blade (3), the limiting torsion spring (542) is sleeved on the rotating shaft (544), and one end of the limiting torsion spring (542) is connected to the rotating shaft (544), The other end is connected to the first blade (3), and the linkage gear (543) is sleeved on the rotating shaft (544); the linkage rack (545) is connected to the frame (2), and the linkage gear (543) is used to engage with the linkage rack (545) during the downward movement of the first lifting plate (522), so that the extension blade (541) rotates and penetrates the middle column sheet silicon steel sheet (6) on the workbench (1), and causes the limit torsion spring (542) to deform.

5. The punching device for the center column type silicon steel sheet according to claim 4 is characterized in that: The sliding assembly (51) comprises a sliding plate (511) and a sliding member (512) for driving the sliding plate (511) to slide in a direction parallel to the length of the workbench (1); the second blade (4) is slidably connected to the sliding plate (511); and the second blade (4) slides relative to the sliding plate (511), so that, during the rotation of the extension blade (541), the second blade (4) is not located on the rotation path of the extension blade (541).

6. The punching hole equipment for the center column type silicon steel sheet according to claim 5 is characterized in that: The shortest distance between the sliding plate (511) and the first lifting plate (522) satisfies that: the second blade (4) is not on the moving path of the extending blade (541); and further comprises an offset component (53), wherein the offset component (53) is used to offset a specified distance in a direction close to the second blade (4) during the downward movement of the second blade (4), so that the punching position of the center column sheet-type silicon steel sheet (6) of the offset second blade (4) and the punching position of the center column sheet-type silicon steel sheet (6) of the extending blade (541) have an overlapping area.

7. The punching hole equipment for the center column type silicon steel sheet according to claim 6 is characterized in that: The offset assembly (53) comprises a limit rod (531), a docking protrusion (532) and a limit spring (533); the limit rod (531) is connected to the frame (2); the second blade (4) is slidably connected to the sliding plate (511) via the limit spring (533); the docking protrusion (532) is arranged on the second blade (4); and when the second lifting plate (524) does not move downward, the docking protrusion (532) abuts against the side wall of the limit rod (531) under the action of the elastic force of the limit spring (533); the docking protrusion (532) is used to break away from the abutment of the limit rod (531) during the downward movement of the second lifting plate (524), and drive the second blade (4) to deflect in a direction close to the first blade (3) under the action of the elastic force of the limit spring (533).

8. The punching device for the center column type silicon steel sheet according to claim 7, characterized in that: A first pad (11) is provided on the workbench (1) and below the first blade (3) and the extended blade (541); a yield spring (13) is commonly connected between the first pad (11) and the workbench (1); the first pad (11) is slidably connected to the workbench (1) via the yield spring (13); and the sliding direction of the first pad (11) is parallel to the lifting direction of the first blade (3); a connecting frame (14) is provided on the side wall of the second blade (4); the other end of the connecting frame (14) is connected to a second pad (12); the second pad (12) is located below the second blade (4); and the first pad (11) and the second pad (12) are both used to support the middle column sheet-type silicon steel sheet (6).

9. The punching hole equipment for the center column type silicon steel sheet according to claim 1, characterized in that: The side walls of the first lifting plate (522) and the second lifting plate (524) are both provided with a pressing plate (528), and the pressing plate (528) is used to press against the upper surface of the middle column sheet-shaped silicon steel sheet (6) on the workbench (1) when the first lifting plate (522) or the second lifting plate (524) descends.

10. The punching hole equipment for the center column type silicon steel sheet according to claim 9, characterized in that: A flexible pad (529) is provided on one side surface of the pressing plate (528) facing the workbench (1), and the flexible pad (529) is used to contact the surface of the middle column sheet-shaped silicon steel sheet (6) on the workbench (1).

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