Production process and production equipment for EI-type silicon steel sheet

Abstract

The invention relates to the field of silicon steel sheet processing, in particular to an EI type silicon steel sheet production process and production equipment. The EI type silicon steel sheet production process comprises the steps that S1, longitudinal shearing is conducted, specifically, a raw material steel belt is longitudinally cut into a product steel belt with the set width, and the product steel belt is wound into a coil; and S2, punching the silicon steel sheets: utilizing a product steel belt with the width consistent with the total length of the EI-type silicon steel sheet to perform one-time punching on a single station to obtain an E-shaped silicon steel sheet and an I-shaped silicon steel sheet. The EI type silicon steel sheet production equipment comprises a longitudinal shearing and distributing unit and an EI type silicon steel sheet punching and shearing unit, the longitudinal shearing and distributing unit comprises an uncoiling machine, a feeding machine table, a longitudinal shearing machine, a receiving and leveling machine and a coiling machine, and the EI type silicon steel sheet punching and shearing unit comprises a coiling frame, a steel belt leveling machine and a silicon steel sheet punching and cutting machine. A plurality of product steel strips with straight edges are arranged, and the E-shaped silicon steel sheet and the I-shaped silicon steel sheet are obtained by punching the product steel strips on a single station at a time, so that the machining precision of the E-shaped silicon steel sheet and the I-shaped silicon steel sheet is improved.

Description

Technical Field

[0001] The present application relates to the field of silicon steel sheet processing, and in particular to a production process of an EI type silicon steel sheet. In addition, the present application also relates to an EI type silicon steel sheet production device. Background Art

[0002] Silicon steel sheet, also known as silicon steel sheet, is an electrical steel material with a high silicon content. It has good magnetic conductivity and low eddy current loss, and is the core material for manufacturing power equipment such as transformers and generators. By optimizing the composition content of silicon steel, fine rolling and return processing, and multi-sheet stacking molding process, the transmission effect of the magnetic field can be improved, the energy loss in the electromagnetic conversion process can be reduced, and the utilization efficiency of electric energy can be improved. It has a wide range of applications in power transmission, energy storage, industrial automation, household appliances and other fields.

[0003] EI silicon steel sheets include E-shaped silicon steel sheets and I-shaped silicon steel sheets. By matching E-shaped silicon steel sheets with I-shaped silicon steel sheets, iron cores of various transformers, rectifiers, etc. can be made. After the coils of transformers, rectifiers and other devices are wound, E-shaped silicon steel sheets and I-shaped silicon steel sheets can be respectively inserted into the coils to make their iron cores, which greatly facilitates the winding of the coils and is the main material for making iron cores of small and medium-sized transformers.

[0004] EI silicon steel sheets are usually punched and formed on silicon steel plates or silicon steel strips through dies. The E-shaped silicon steel sheets and I-shaped silicon steel sheets of the existing EI silicon steel sheets are usually processed separately on different punching equipment. During the processing, the punching process is usually carried out on a multi-station punching and shearing machine using a progressive die. The silicon steel strip is punched and cut in multiple processes such as punching holes, opening windows, positioning holes, and trimming at multiple stations of the progressive die. The steel strip also needs to be positioned at different stations, and the positioning accuracy of the steel strip is required to be high, which affects the structural accuracy of the EI silicon steel sheet. Summary of the invention

[0005] In order to ensure the processing accuracy of EI type silicon steel sheets, the present application provides an EI type silicon steel sheet production process and production equipment.

[0006] The EI type silicon steel sheet production process provided in this application adopts the following technical solution: A production process for EI type silicon steel sheets comprises the following steps: S1, longitudinal shearing: longitudinally cutting a raw steel strip into a product steel strip of a set width according to the size requirements of the EI type silicon steel sheet, and winding it into a roll; S2, punching silicon steel sheets: using a product steel strip with a width consistent with the total length of the EI type silicon steel sheet for edgeless punching, and punching at a single station to obtain an E-shaped silicon steel sheet and an I-shaped silicon steel sheet.

[0007] By adopting the above technical scheme, the raw steel strip is longitudinally cut into a product steel strip with the same total length as the EI type silicon steel sheet, and the two side edges of the product steel strip can be used to directly form the edges on both sides of the length direction of the EI type silicon steel sheet, so there is no need to punch the edges on both sides of the length direction of the EI type silicon steel sheet on the product steel strip, which reduces the punching amount of the EI type silicon steel sheet processing, reduces the formation of punching waste, and improves the utilization rate of the product steel strip; by using the method of punching at a single station to obtain E-shaped silicon steel sheets and I-shaped silicon steel sheets, all punching operations can be completed through one positioning, avoiding the influence of multiple positioning on the positioning accuracy, ensuring the accuracy of the positional relationship between all holes, windows and edges on the EI type silicon steel sheet, and improving the processing accuracy of the EI type silicon steel sheet.

[0008] In a specific feasible implementation scheme, step S1 includes the following steps: S1.1, uncoiling the raw steel strip: leading the raw steel strip out of the coil and conveying it to the working platform; S1.2, conveying and flattening the raw steel strip: driving the raw steel strip to be conveyed along the working platform, and flattening it during the conveying process; S1.3, lateral limiting: limiting the lateral position of the raw steel strip when it is conveyed on the working platform; S1.4, positioning longitudinal cutting: locking the position of the raw steel strip on both sides of the cutting line, and cutting the raw steel strip into multiple product steel strips according to the set width; S1.5, leveling and coiling: flattening multiple product steel strips and winding them into coils respectively.

[0009] By adopting the above technical scheme, by flattening the raw steel strip, the position stability of different parts of the raw steel strip during the cutting process can be improved, thereby ensuring the accuracy of the cutting position; by locking the position of the raw steel strip during longitudinal cutting, the position of the raw steel strip can be prevented from shifting during the cutting process, thereby ensuring the accuracy of the width of multiple product steel strips and the straightness of the edges.

[0010] In a specific feasible implementation scheme, in step S1.2, the raw steel strip is flattened by setting a roller array on the conveying path of the raw steel strip; in step S1.4, the width of the product steel strip formed by cutting is controlled by setting a plurality of longitudinal shear blades close to each other on the upper and lower longitudinal shear frames and setting spacers of set width between adjacent longitudinal shear blades; the raw steel strip is clamped by setting elastic strips at positions corresponding to the spacers between the upper and lower longitudinal shear frames to lock the position of the raw steel strip on both sides of the cutting line.

[0011] By adopting the above technical scheme, the roller array is used to support different positions of the raw steel strip during the transmission process, so that the different curling states of the raw steel strip at different positions can be stretched, so that the raw steel strip can be better flattened during the transmission process, thereby ensuring the flatness of the raw steel strip; by using spacers at different heights supported between different longitudinal cutting blades, the distance between the longitudinal cutting blades on the longitudinal cutting knife frame and the stability of the position of the longitudinal cutting blades during the cutting process can be accurately controlled to ensure the cutting accuracy of the product steel strip; by using elastic pressure strips arranged between the upper and lower longitudinal cutting knife frames at positions corresponding to the spacers, the positions outside the cutting line can be clamped from the upper and lower sides of the raw steel strip, thereby limiting the change in position of the raw steel strip during the cutting process, thereby ensuring the accuracy of the width of the product steel strip obtained by cutting.

[0012] In a specific feasible implementation scheme, step S2 includes the following steps: S2.1, product strip uncoiling: unwinding the product steel strip from the material coil; S2.2, feeding and leveling: driving the product steel strip to be conveyed, and leveling the product steel strip during the conveying process; S2.3, fixed conveying: conveying the product steel strip from a defined position to a punching and cutting station; S2.4, positioning and punching: after the product steel strip is pressed and positioned, the product steel strip is punched with positioning holes, stamped and formed into EI silicon steel sheets, and trimmed and cut in one action, and E-shaped silicon steel sheets and I-shaped silicon steel sheets are obtained at the same time; S2.5, silicon steel sheet collection: the E-shaped silicon steel sheets and I-shaped silicon steel sheets are stacked and collected for standby use.

[0013] By adopting the above technical scheme, by pressing and positioning the product steel strip before punching, the position of the punching part of the steel strip can be limited during the punching process, which is beneficial to prevent the movement of the steel strip during the punching process and ensure the processing accuracy of the EI type silicon steel sheet obtained by punching; by punching positioning holes, punching forming and trimming and cutting actions, the force range and force size of a single punching action can be reduced, the deformation of the steel strip during the punching process can be reduced, and the interference between different actions can be reduced, ensuring that multiple punching actions can be performed at the same workstation and through positioning.

[0014] In a specific feasible implementation scheme, in step S2.4, a product steel strip having a width equal to the total length of the EI-type silicon steel sheet is used, the openings of the two E-shaped silicon steel sheets are punched out simultaneously, and the two window holes of the two E-shaped silicon steel sheets are used to punch out two I-shaped silicon steel sheets respectively, so that two E-shaped silicon steel sheets and two I-shaped silicon steel sheets are obtained by one punching.

[0015] By adopting the above technical scheme, a product steel strip having a width equal to the total length of the EI type silicon steel sheet is used, and the two side edges of the product steel strip can be used as the two side edges in the length direction of the EI type silicon steel sheet, thereby reducing the punching amount of the product steel strip and improving the utilization rate of the product steel strip; by using the method of punching the openings of two E-shaped silicon steel sheets relative to each other at the same time, the window holes of the two E-shaped silicon steel sheets can be blanked to form a whole material, thereby providing a guarantee for the reuse of the window hole blanking; by using the two integral window holes of the two E-shaped silicon steel sheets to punch and form two I-shaped silicon steel sheets, the E-shaped silicon steel sheet and the I-shaped silicon steel sheet can be obtained at the same time by punching the product steel strip once, thereby effectively improving the processing efficiency of the EI type silicon steel sheet and effectively improving the utilization rate of the product steel strip.

[0016] The EI type silicon steel sheet production equipment provided in this application adopts the following technical solution: A kind of EI type silicon steel sheet production equipment comprises a longitudinal shearing and material dividing unit and an EI type silicon steel sheet punching and shearing unit, the longitudinal shearing and material dividing unit comprises an uncoiler, a feeder table, a longitudinal shearing machine, a material receiving and leveling machine and a coiling machine, the feeder table is arranged on the side of the uncoiler, comprises a feeder, a first smooth roller feeding table section, a roller spreading platform section and a second smooth roller feeding table section arranged in sequence, the roller spreading platform section is provided with a roller array, the second smooth roller feeding table section is provided with a power roller and a lateral limit device; the EI type silicon steel sheet punching and shearing unit comprises a coil rack, a steel strip leveling machine and a silicon steel sheet punching and cutting machine arranged in sequence, the coil rack can install a product steel strip coil and release the product steel strip on the product steel strip coil, the steel strip leveling machine can level the product steel strip, and the silicon steel sheet punching and cutting machine can use the product steel strip to perform single-station one-time stamping and forming of EI type silicon steel sheet.

[0017] By adopting the above technical scheme, the raw steel strip released from the material coil can be effectively flattened by using the roller spreading platform section, thereby improving the flatness of the raw steel strip; the lateral limit device set in the second smooth roller feeding platform section can ensure that the raw steel strip enters the longitudinal shearing machine from a fixed lateral position, thereby ensuring the cutting accuracy of the longitudinal shearing machine; the silicon steel sheet punching machine that forms the EI-shaped silicon steel sheet by one-time punching at a single station can effectively improve the processing efficiency of the EI-shaped silicon steel sheet and the utilization rate of the product steel strip, thereby reducing the production cost. The EI-shaped silicon steel sheet production equipment of the present application can realize the EI-shaped silicon steel sheet production process of the present application.

[0018] In a specific feasible implementation scheme, a material receiving mechanism is provided at the feed end of the feeder, and the material receiving mechanism includes a material receiving frame, a material receiving plate and a material receiving frame retracting and releasing driving mechanism. The material receiving frame is hinged at the feed port of the feeder, the material receiving plate is fixed on the material receiving frame, and the material receiving frame retracting and releasing driving mechanism is arranged between the feeder and the material receiving frame, so as to be able to drive the material receiving frame to open toward the uncoiler, or to fold it obliquely below the feed port of the feeder.

[0019] By adopting the above technical scheme, using the articulated frame hinged at the feed port of the feeder, the receiving mechanism can be opened and extended to the uncoiler when the raw steel strip is fed, ensuring that the raw steel strip is smoothly transported to the feeder along the receiving plate. When the raw steel strip is not transmitted, the receiving mechanism is folded obliquely below the feed port of the feeder, ensuring the working space for hoisting the raw steel strip coil at the uncoiler.

[0020] In a specific feasible implementation scheme, the longitudinal shearing machine comprises an upper tool holder and a lower tool holder, the upper tool holder and the lower tool holder are arranged opposite to each other on the longitudinal shearing machine, a feed end bracket is arranged at the feed end of the upper tool holder and the lower tool holder, and a discharge end bracket is arranged at the discharge end; the upper tool holder and the lower tool holder each comprise a tool holder rotating shaft, a longitudinal shearing blade and a blade spacer, the longitudinal shearing blade is arranged on the tool holder rotating shaft, and blade spacers of set width are respectively arranged between adjacent longitudinal shearing blades on the tool holder rotating shaft; a plurality of steel belt strips are arranged between the blade spacers of the upper and lower tool holders, which are perpendicular to the tool holder rotating shaft and are arranged in pairs up and down, the two ends of the upper steel belt strip are elastically connected to the feed end bracket and the discharge end bracket, respectively, and the two ends of the lower steel belt strip are respectively fixed on the longitudinal shearing machine below the feed end bracket and the discharge end bracket.

[0021] By adopting the above technical scheme, the distance between adjacent longitudinal cutting blades is limited by the blade spacer, which can better ensure the distance and position stability between the longitudinal cutting blades, improve the accuracy of the width of the cut product steel strip and the linearity of the edge, ensure that the edge of the product steel strip can be directly used as the edge of the EI-shaped silicon steel sheet, reduce the punching processing amount of the EI-shaped silicon steel sheet, and improve the utilization rate of the steel strip; by using the steel strip pressure strip arranged between the upper and lower tool holder blade spacers, the steel strip between multiple cutting lines can be pressed and held when the raw steel strip is longitudinally cut, prevent the position of the steel strip from shifting during and after cutting, and better ensure the accuracy of the width of the product steel strip and the linearity of the edge.

[0022] In a specific possible implementation scheme, the silicon steel sheet punching machine includes a punching upper die and a punching lower die, the punching upper die is provided with an elastic pressing block, a punching column, a material breaking protrusion and a cutting blade, the elastic pressing block is slidably arranged in a pressing block groove on the punching upper die, and can slide out of the pressing block groove under the action of a spring, the punching column is arranged corresponding to the positioning hole on the EI type silicon steel sheet, the material breaking protrusion is arranged corresponding to the window hole of the EI type silicon steel sheet, the cutting blade is arranged corresponding to the long side, and the The height of the elastic pressing block in the free state, the end face height of the punching column, the height of the cutting protrusion and the height of the cutting blade decrease successively; the die cavity of the punching lower die is provided with a punching die hole, a forming die groove and a cutting groove, the punching die hole is adapted to the punching column, the forming die groove is adapted to the cutting protrusion, and the cutting groove is adapted to the cutting blade, the punching upper die can cooperate with the punching lower die, and simultaneously complete the punching processing of E-shaped silicon steel sheets and I-shaped silicon steel sheets.

[0023] By adopting the above technical scheme, the elastic pressing block can be used to press and fix the position of the product steel strip before punching it, thereby reducing the deformation and distortion of the steel strip during punching and ensuring the accuracy of the punched product; by utilizing the different heights of the punching column, the cutting protrusion and the cutting blade, the punching of the positioning holes, the punching of the window holes and the cutting actions on the EI type silicon steel sheet can be performed at different times during the punching process, thereby ensuring that the punching process of the EI type silicon steel sheet is carried out at the same workstation and is formed by a single punching action.

[0024] In a specific possible implementation scheme, the punching upper die is provided with punching columns corresponding to the positioning holes on the two E-shaped silicon steel sheets and the two I-shaped silicon steel sheets, the cutting protrusion corresponds to the window holes of the two oppositely arranged E-shaped silicon steel sheets, and corresponds to the two I-shaped silicon steel sheets, and the cutting blades correspond to the shearing line between the two E-shaped silicon steel sheets and the shearing line between the product steel strip and the E-shaped silicon steel sheets respectively; an I-shaped die table is provided in the forming die groove, a return spring is provided between the I-shaped die table and the bottom of the forming die groove, the punching die holes corresponding to the positioning holes on the I-shaped silicon steel sheets are provided on the I-shaped die table, and the upper part is provided with a spring corresponding to the punching die hole. A clamping hole connected to the hole die hole, a pressure slide is arranged in the clamping hole, one end of the pressure slide is arranged with an inclined surface extending into the punching die hole, the side wall of the forming die groove is arranged with an elastic column hole arranged opposite to the clamping hole, a locking block is arranged in the elastic column hole, a locking block spring is arranged between one end of the locking block and the bottom wall of the elastic column hole, and the other end can extend into the clamping hole and abut against the pressure slide under the action of the locking block spring, and when the punching column enters the punching die hole, the punching column can push the pressure slide so that the abutting surface of the pressure slide and the locking block is flush with the wall of the forming die groove.

[0025] By adopting the above technical scheme, by utilizing the cutting protrusions corresponding to the window holes of the two relatively arranged E-shaped silicon steel sheets, the window holes of the two E-shaped silicon steel sheets can be punched and formed at the same time, forming an integral window hole blanking, and utilizing the window hole blanking to form an I-shaped silicon steel sheet, thereby reducing the punching action of the I-shaped silicon steel sheet and improving the material utilization rate; by utilizing the clamping holes arranged on the I-shaped die table and the elastic column holes on the side walls of the forming die groove, as well as the pressure slide bar and the locking block arranged in the clamping holes and the elastic column holes, when punching the positioning holes of the EI-shaped silicon steel sheet, it is possible to ensure that the I-shaped die table supports the bottom of the steel strip, and when cutting the E-shaped silicon steel sheet, the I-shaped silicon steel sheet can be lowered into the forming die groove, thereby avoiding the cutting blade from damaging the I-shaped silicon steel sheet.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The position of the raw steel strip during feeding and longitudinal shearing is limited by the lateral limit device and the steel strip pressure strip, which can improve the width accuracy and edge linearity of the product steel strip obtained by longitudinal shearing, so that the edge of the product steel strip can be used to directly form the edge of the EI silicon steel sheet, reducing the punching amount of the EI silicon steel sheet, improving the punching efficiency of the EI silicon steel sheet and the material utilization rate of the EI silicon steel sheet processing; 2. By setting a material-breaking protrusion corresponding to the window holes of two oppositely arranged E-shaped silicon steel sheets on the punching upper die, the window holes of two E-shaped silicon steel sheets are punched out on the product steel strip to form an integral body, and the window holes can be used to form an I-shaped silicon steel sheet, thereby reducing the punching processing amount of the I-shaped silicon steel sheet and improving the material utilization rate of the product steel strip; 3. By setting a snap-in hole on the I-shaped die table and an elastic column hole at a relative position to the side wall of the forming die groove, and setting a pressure slide bar and a locking block in the snap-in hole and the elastic column hole, the I-shaped die table can be kept in a position flush with the punching lower die when punching the positioning hole of the EI type silicon steel sheet, ensuring that the positioning hole can be punched on the I-shaped silicon steel sheet. After the window hole is punched to form the I-shaped silicon steel sheet, when the E-shaped silicon steel sheet is punched and cut, the I-shaped silicon steel sheet is lowered into the forming die groove to avoid damage to the I-shaped silicon steel sheet by the cutting blade, thereby ensuring that the punching processing of the E-shaped silicon steel sheet and the I-shaped silicon steel sheet can be completed at the same time in one punching action of a single station. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a flowchart of an embodiment of the EI type silicon steel sheet production process of the present application.

[0028] Figure 2 This is a flowchart of the longitudinal shearing step in one embodiment of the EI type silicon steel sheet production process of the present application.

[0029] Figure 3This is a flowchart of the step of punching silicon steel sheets in one embodiment of the EI type silicon steel sheet production process of the present application.

[0030] Figure 4 This is a schematic diagram of a longitudinal shearing and dividing unit in one embodiment of the EI type silicon steel sheet production equipment of the present application.

[0031] Figure 5 This is a schematic diagram of a feeder in one embodiment of the EI type silicon steel sheet production equipment of the present application.

[0032] Figure 6 This is a schematic diagram of a longitudinal shearing machine in one embodiment of the EI type silicon steel sheet production equipment of the present application.

[0033] Figure 7 This is a schematic diagram of a material receiving and leveling machine and a winding machine in one embodiment of the EI type silicon steel sheet production equipment of the present application.

[0034] Figure 8 This is a schematic diagram of an EI type silicon steel sheet punching and shearing unit in one embodiment of the EI type silicon steel sheet production equipment of the present application.

[0035] Fig. 9 This is a schematic diagram of the punching upper die in one embodiment of the EI type silicon steel sheet production equipment of the present application.

[0036] Fig.10 This is a schematic cross-sectional diagram of the punching upper die in one embodiment of the EI type silicon steel sheet production equipment of the present application.

[0037] Fig.11 This is a schematic diagram of the punching lower die in one embodiment of the EI type silicon steel sheet production equipment of the present application.

[0038] Fig.12 This is a schematic cross-sectional diagram of a punching lower die in one embodiment of the EI type silicon steel sheet production equipment of the present application.

[0039] Fig.13 for Fig.12 A partial enlarged view of part A.

[0040] Description of the reference numerals: 1. Unwinder; 11. Steel coil mounting shaft; 12. Reel mounting seat; 13. Steel coil lifting seat; 14. Unwinding pressure wheel; 2. Feeder platform; 21. Feeder; 22. First smooth roller material guide platform section; 221. Material guide smooth roller; 222. Smooth roller side strip; 223. Steel belt support strip; 23. Roller display platform section; 231. Roller mounting frame; 232. Roller; 24. Second smooth roller material guide platform section; 241. Power roller; 25. Material receiving mechanism; 251. Material receiving rack; 252, material receiving plate; 253, material receiving rack retracting and releasing driving mechanism; 3, longitudinal shearing machine; 31, upper knife rack; 311, knife rack rotating shaft; 312, longitudinal shearing blade; 313, blade spacer; 32, lower knife rack; 33, feed end bracket; 34, discharge end bracket; 35, steel belt pressure strip; 4, material receiving and leveling machine; 41, material receiving platform; 411, material receiving roller; 42, front arc guide frame; 43, overhanging anti-curve pit; 44, rear arc guide frame; 441, separation limit roller ; 442, lead-out roller; 443, separation ring; 5, winder; 51, wind-up shaft; 6, coil rack; 61, rack seat; 62, transverse support shaft; 63, support sleeve; 64, adjustment sleeve; 65, adjustment tie rod ring; 66, tie rod; 67, hinged rod; 68, coil support block; 7, steel strip leveler; 71, steel strip feeding mechanism; 72, first guide plate group; 73, second guide plate; 74, third guide plate; 8, silicon steel sheet punching machine; 81, punching upper die; 811 , elastic pressing block; 812, punching column; 813, cutting protrusion; 814, cutting blade; 815, pressing block groove; 82, punching lower die; 821, punching die hole; 822, forming die groove; 823, cutting groove; 824, I-shaped die table; 825, snap-on hole; 826, pressure slide; 827, elastic column hole; 828, locking block; 83, limiting groove; 84, positioning column; 85, pulling rod; 86, collecting rod; 91, raw steel strip; 92, product steel strip. DETAILED DESCRIPTION

[0041] The specific implementation of the present application is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present application, and is not used to limit the present application.

[0042] In the present application, unless otherwise stated, the directions or positional relationships indicated by the directional words such as “front, rear, longitudinal, and transverse” are based on the directions or positional relationships of the material movement in the EI-shaped silicon steel sheet production equipment of the present application. Among them, the directional word “longitudinal” refers to the direction of movement of the material on the production equipment, “transverse” refers to the direction perpendicular to the “longitudinal” on the horizontal plane, “front” refers to the direction of the feed end of the production equipment, and “rear” refers to the direction of the discharge end of the production equipment. The description of the directions or positional relationships of the EI-shaped silicon steel sheet production equipment and its components of the present application is consistent with the actual installation directions when they are used.

[0043] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" 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 direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] In this specification, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features.

[0045] An embodiment of the EI type silicon steel sheet production process of the present application is as follows: Figure 1 As shown, the following steps are included: S1. Slitting: Silicon steel raw material strips of a certain width purchased from a steel plant, such as 1030mm wide oriented electrical steel strips purchased from Wuhan Iron and Steel Co., Ltd., are longitudinally cut according to the size requirements of the required EI type silicon steel sheets to obtain multiple product steel strips with the same width as the total length of the required EI type silicon steel sheets, and the different product steel strips are respectively wound into product steel strip coils for use in the punching process of the EI type silicon steel sheets.

[0046] When the raw steel strip is longitudinally sheared, it can be longitudinally cut into multiple product steel strips of the same width for punching and processing EI silicon steel sheets of the same specification or the same total length; the raw steel strip can also be longitudinally cut into product steel strips of different widths according to the total length requirements of EI silicon steel sheets of different specifications, and used to produce EI silicon steel sheets of different specifications. Usually, the total length of the required EI type can be combined according to the width of the raw steel strip, so that the width of multiple product steel strips is close to the width of the raw steel strip, thereby reducing the waste loss at the edge of the raw steel strip.

[0047] When longitudinally shearing the raw steel strip, it is necessary to ensure the cutting accuracy of the width of the product steel strip and the linearity of the edge of the product steel strip, so that the edge of the product can be directly used as the edge of the EI type silicon steel sheet, thereby eliminating the need to punch the edge of the product steel strip, reducing the workload of punching and improving the material utilization rate of the product steel strip.

[0048] S2. Punching silicon steel sheet: Use product steel strips with the same width as the total length of the EI type silicon steel sheet for punching processing. During processing, the edges of the product steel strips on both sides are not punched. The edges of the product steel strips are directly used as the edges of the EI type silicon steel sheet, which reduces the workload of punching and improves the material utilization rate of the product steel strips.

[0049] The product steel strip is conveyed to the punching station, and after being positioned on the punching station, all punching actions on the product steel strip are completed at the station through one lifting and lowering action of the punching die, and the finished E-shaped silicon steel sheet and I-shaped silicon steel sheet are obtained at the same time.

[0050] Since the E-shaped silicon steel sheets and I-shaped silicon steel sheets are both processed at the same processing station and are formed through a one-time positioning processing of the product steel strip, the product shapes of the E-shaped silicon steel sheets and the I-shaped silicon steel sheets, as well as the relative positions of different punching points on the E-shaped silicon steel sheets and the I-shaped silicon steel sheets have higher processing accuracy, which effectively improves the processing accuracy and processing efficiency of the EI type silicon steel sheets.

[0051] In some embodiments of the EI type silicon steel sheet production process of the present application, as Figure 2 As shown, the longitudinal shearing process of step S1 is specifically carried out step by step according to the following steps: S1.1, Raw steel strip uncoiling: The raw steel strip is guided out of the purchased oriented electrical steel strip coil by the uncoiler and transported to the working platform, and then transported to the slitting equipment on the working platform. The working platform can be any table or support frame with a horizontal bearing surface for transporting the raw steel strip.

[0052] S1.2, convey and flatten the raw steel strip: The raw steel strip is conveyed backward along the working platform. Specifically, a feeder can be used, and the feed rollers on the feeder clamp the raw steel strip from the upper and lower sides, and drive the raw steel strip to be conveyed backward. In addition, a structure for promoting the flattening of the raw steel strip is provided on the working platform, so that the raw steel strip releases the curling stress, unfolds and flattens into a flat state, and is conveyed on the working platform.

[0053] S1.3, lateral limit: A transverse limiting device is arranged on the conveying path of the raw steel strip on the working platform to correct the deviation of the raw steel strip during conveying, so that the raw steel strip is conveyed backward at the transverse position defined by the transverse limiting device.

[0054] S1.4, Positioning slitting: The steel strip longitudinal shearing machine is used to cut the raw steel strip while pressing and positioning the raw steel strip in a fixed position to ensure the cutting accuracy of the raw steel strip. Different from the existing steel strip positioning method, the pressing and positioning of the raw steel strip in the present application is carried out simultaneously on both sides of multiple cutting lines on the raw steel strip. Since it is usually necessary to cut the raw steel strip into multiple product steel strips at the same time, it is necessary to set cutting blades at multiple horizontal positions on the raw steel strip at the same time, and cut the raw steel strip longitudinally at the same time, which forms multiple cutting lines on the raw steel strip. In order to ensure the accuracy of the width and edge straightness of each product steel strip formed by cutting, the raw steel strip is pressed on both sides of each cutting line to fix the position of the raw steel strip on both sides of each cutting line, and when fixing the position of the raw steel strip, the backward transmission of the raw steel strip is guaranteed to keep the longitudinal cutting operation continuous.

[0055] By precisely controlling the relative positions between the multiple cutting blades, the widths of the multiple product steel strips formed by cutting are controlled within a set value to form multiple product steel strips. The widths of the multiple product steel strips can be the same or different, and some product steel strips can have the same width and some product steel strips can have different widths.

[0056] Since the width and edge straightness of the product steel strip are precisely controlled, it is no longer necessary to punch the edge of the product steel strip in the subsequent punching process, and the edge of the product steel strip can be directly used as the edge of the EI type silicon steel sheet. This makes the longitudinal shearing step in the EI type silicon steel sheet production process of the present application a prerequisite for the subsequent punching step of the silicon steel sheet.

[0057] S1.5, leveling and rolling: The multiple steel strips formed by cutting are leveled to correct the edge deformation caused by cutting and restore the flatness of the steel strips. The multiple steel strips after leveling are rolled up and curled to form steel strip coils.

[0058] In a preferred embodiment of the EI type silicon steel production process of the present application, the raw steel strip is flattened in step S1.2 by passing the raw steel strip through a roller array. Specifically, a roller array formed by a plurality of rollers arranged vertically and horizontally is provided on the working platform, and the raw steel strip passes through the roller array when being conveyed on the working platform, and the plurality of rollers in the roller array respectively form short-term support for different local positions on the raw steel strip, so that the local curling stress of the raw steel strip is released, and the raw steel strip gradually returns to a flat and flat state.

[0059] In step S1.4, multiple longitudinal shear blades close to each other are arranged on the upper and lower longitudinal shear frames. When the upper and lower longitudinal shear frames rotate in opposite directions, the longitudinal shear blades close to each other form a shearing effect on the raw steel strip passing between the upper and lower longitudinal shear frames, and the raw steel strip is longitudinally cut into multiple product steel strips. According to the width requirements of the product steel strip, spacers of set width are respectively arranged between adjacent longitudinal shear blades on the upper and lower shear frames. By controlling the height of the spacers and the parallelism of the end faces of the spacers, the distance between adjacent longitudinal shear blades and the position of the longitudinal shear blades are accurately controlled, thereby accurately controlling the width and edge straightness of the product steel strip formed by cutting the original steel strip.

[0060] A plurality of longitudinally arranged elastic strips are arranged between the upper and lower longitudinal shear frames, and the plurality of elastic strips are arranged at transverse positions corresponding to the spacer sleeves, so that the plurality of elastic strips clamp the steel strips on both sides of the longitudinal shear blades. The plurality of elastic strips can limit the upper and lower positions and transverse positions of the steel strips during the cutting process, ensuring that when the longitudinal shear blades cut the raw steel strips, the position of the raw steel strips will not change due to the shearing force of the longitudinal shear blades, effectively ensuring the accuracy of the width of the product steel strip obtained by cutting and the linearity of the edge of the product steel strip.

[0061] In some embodiments of the EI type silicon steel production process of the present application, as Figure 3 As shown, the process of punching silicon steel sheet in step S2 is specifically carried out step by step according to the following steps: S2.1. Uncoiling of product steel strip: The product steel strip coil of the required width is installed on the material rack, and the product steel strip is gradually unrolled from the coil by the rotation of the coil.

[0062] S2.2, feeding and leveling: The product steel strip is driven to be transported backwards by a driving device, and the product steel strip is flattened by a steel strip flattening device during the conveying process, so that the product steel strip is in a straight state.

[0063] S2.3. Fixed transmission: The product strip is limited to a set transverse position by a limiting structure and is transferred from the fixed transverse position to the punching station.

[0064] S2.4, Positioning punching: The positioning structure is used to press and fix the product steel strip in the punching die. In addition to using the die to limit the horizontal and vertical positions of the product steel strip on the horizontal plane, the positioning structure is also used to limit the vertical position of the product steel strip. This can reduce the deformation of the product steel strip caused by the punching force of the die and improve the punching accuracy of the EI type silicon steel sheet obtained by punching.

[0065] Through a single lifting action of the punching die, the punching holes of the product steel strip, the stamping forming and trimming of the EI silicon steel sheet are completed successively, and the E-shaped silicon steel sheet and the I-shaped silicon steel sheet are obtained at the same time; S2.5, Silicon steel sheet collection: The E-shaped silicon steel sheets and I-shaped silicon steel sheets obtained by punching and cutting are collected separately by using a collecting device, wherein the E-shaped silicon steel sheets are stacked and arranged in a set direction, so as to facilitate the directional access of the E-shaped silicon steel sheets; the I-shaped silicon steel sheets have a relatively simple structure, and directional access or directional transmission is relatively convenient, and can be collected using ordinary containers.

[0066] In a preferred embodiment of the EI type silicon steel production process of the present application, when the EI type silicon steel sheet is processed by using the product steel strip in step S2.4, a product steel strip with a width consistent with the total length of the EI type silicon steel sheet is selected, and the two side edges of the product steel strip are used as the outer edges of the two side columns of the E-shaped silicon steel sheet, thereby eliminating the need to cut the outer edges of the side columns of the E-shaped silicon steel sheet during punching, thereby reducing the amount of punching work and improving the material utilization rate of the product steel strip.

[0067] When punching the EI type silicon steel sheet, the two E-shaped silicon steel sheets are punched at the same time with their opening sides relative to each other. In this way, the window holes of the two E-shaped silicon steel sheets are relative to each other and connected to each other, and the window holes of the two E-shaped silicon steel sheets at relative positions can be punched as a whole to form an integral window hole blank, which can be used as a raw material for punching I-shaped silicon steel sheets. The size of the I-shaped silicon steel sheet of the EI type silicon steel sheet produced in this embodiment is consistent with the size of the integral window hole blank of the two E-shaped silicon steel sheets, and can be used as an I-shaped silicon steel sheet without punching the periphery of the blank. If the length and / or width of the I-shaped silicon steel sheet is smaller than the length and / or width of the overall window hole blanking of the two E-shaped silicon steel sheets, it is also possible to cut one length and / or width edge of the window hole blanking to obtain two E-shaped silicon steel sheets and two I-shaped silicon steel sheets at the same time through one punching action.

[0068] If either the length or the width of the I-shaped silicon steel sheet is greater than the length or width of the overall window hole blanking of two E-shaped silicon steel sheets, the method of this preferred embodiment cannot be used to produce EI-type silicon steel sheets of this specification, and it is necessary to set up an additional punching area for the I-shaped silicon steel sheet on the side of the product steel strip opposite to the E-shaped silicon steel sheet.

[0069] An embodiment of the EI type silicon steel sheet production equipment of the present application is as follows Figures 4 to 13As shown, it includes a longitudinal shearing and dividing unit and an EI type silicon steel sheet punching and shearing unit. The longitudinal shearing and dividing unit is used to longitudinally shear the raw steel strip 91 to obtain multiple product steel strips 92; the EI type silicon steel sheet punching and shearing unit is used to punch the product steel strip 92 to obtain EI type silicon steel sheets. EI type silicon steel sheets include E-shaped silicon steel sheets and I-shaped silicon steel sheets. E-shaped silicon steel sheets and I-shaped silicon steel sheets are usually used in combination in a one-to-one correspondence.

[0070] like Figure 1 As shown, the slitting and dividing machine group includes an unwinder 1, a feeder table 2, a slitting machine 3, a material receiving and leveling machine 4, and a rewinder 5. A steel coil mounting shaft 11 is provided on the unwinder 1, and the steel coil mounting shaft 11 is rotatably connected to a reel mounting seat 12, and can rotate on the steel coil mounting shaft 11. An unwinding motor can also be provided on the reel mounting seat 12, and the unwinding motor drives the steel coil mounting shaft 11 to rotate, so that the raw steel strip 91 mounted on the steel coil mounting shaft 11 rotates, and the raw steel strip 91 wound on the reel is released.

[0071] A steel coil lifting seat 13 is provided below the steel coil installation shaft 11. When the material coil of the raw steel strip 91 needs to be installed on the steel coil installation shaft 11, firstly use a crane or other lifting equipment to lift the material coil onto the steel coil lifting seat 13, then raise the steel coil lifting seat 13 to a suitable height, control the steel coil installation shaft 11 to pass through the center hole of the material coil, use the support bar on the steel coil installation shaft 11 to support it on the hole wall of the center hole of the coil, and install the coil on the steel coil installation shaft 11.

[0072] A discharge pressing wheel 14 is provided above the steel coil mounting shaft 11. When the raw steel strip 91 is discharged, the discharge pressing wheel 14 is controlled to descend and press on the outer side of the raw steel strip 91 coil to prevent the raw steel strip 91 on the coil from loosening during the discharge process.

[0073] The feeder table 2 is arranged on the side of the uncoiler 1, and the raw steel strip released by the uncoiler 1 is conveyed to the feeder table 2 and then conveyed backward on the feeder table 2. Figure 5 As shown, the feeder platform 2 includes a feeder 21 , a first smooth roller material guiding platform section 22 , a roller spreading platform section 23 and a second smooth roller material guiding platform section 24 .

[0074] The feeder 21 is arranged opposite to the uncoiler 1, and is provided with an upper feed roller and a lower feed roller which are arranged opposite to each other. The upper and lower feed rollers can rotate in opposite directions under the drive of the feeding drive motor, and drive the raw steel strip 91 pressed between the upper and lower feed rollers to be transmitted backwards.

[0075] The first smooth roller material guiding stage section 22 is arranged at the material discharging side of the feeder 21. A plurality of smooth rollers 221 for guiding material are arranged on the first smooth roller material guiding stage section 22. The roller shafts of the smooth rollers 221 for guiding material are rotatably connected to a plurality of smooth roller side strips 222 on both sides of the first smooth roller material guiding stage section 22. The two ends of the plurality of smooth roller side strips 222 are hinged to each other in sequence. The plurality of smooth rollers 221 for guiding material are rotatably mounted on the two ends of the plurality of smooth roller side strips 222. A steel belt support strip 223 is arranged in the space enclosed by the adjacent smooth rollers 221 for guiding material and the smooth roller side strips 222 on both sides. The two ends of the steel belt support strip 223 are fixed to the smooth roller side strips 222. The upper surface of the steel belt support strip 223 is arranged to be a wear-resistant smooth plane. The installation height of the material guiding smooth roller 221 is slightly higher than the height of the steel strip support strip 223. When the raw material steel strip 91 is conveyed on the first smooth roller guiding stage 22, the material guiding smooth roller 221 is supported below the raw material steel strip 91 and can rotate with the conveyance of the raw material steel strip 91, thereby reducing the conveyance resistance of the raw material steel strip 91. The steel strip support strip 223 is supported below the raw material steel strip 91 to prevent the raw material steel strip 91 from being excessively bent between two adjacent material guiding smooth rollers 221. The smooth surfaces of the material guiding smooth roller 221 and the steel strip support strip 223 can prevent the raw material steel strip 91 from being scratched during the conveyance process.

[0076] The roller display platform section 23 is arranged at the rear end of the first smooth roller guide platform section 22. A plurality of roller mounting frames 231 are arranged on the roller display platform section 23. The roller mounting frames 231 are longitudinally fixed on the roller display platform section 23, and the plurality of roller mounting frames 231 are evenly arranged in the transverse direction of the roller display platform section 23. A plurality of rollers 232 are evenly arranged on each roller mounting frame 231. The rollers 232 are rotatably connected to the roller mounting frames 231. The plurality of rollers 232 on the plurality of roller mounting frames 231 form a roller array. When the raw steel strip 91 passes through the roller array, multiple rollers 232 are supported from different positions below the raw steel strip 91. On the one hand, the transmission resistance of the raw steel strip 91 is reduced. On the other hand, multiple rollers apply supporting force from multiple different positions below the raw steel strip 91 during the transmission of the raw steel strip 91, which can promote the release of the residual curling stress on the raw steel strip 91, so that the raw steel strip 91 can be better flattened, which is beneficial to improving the flatness of the raw steel strip 91.

[0077] The second smooth roller material guiding platform section 24 is arranged at the rear end of the roller display platform section 23. The front section of the second smooth roller material guiding platform section 24 is composed of a guiding smooth roller 221, a smooth roller side strip 222 and a steel belt support strip 223 similar to the first smooth roller material guiding platform section 22. The rear section is provided with a smooth roller mounting platform 242. A plurality of guiding smooth rollers 221 are rotatably mounted on the smooth roller mounting platform 242. A power roller 241 is arranged above one of the guiding smooth rollers 221. One end of the power roller 241 is connected to a roller driving motor, and the other end is connected to the corresponding guiding smooth roller 221 through a gear transmission, so as to drive the raw steel belt 91 clamped between the power roller 241 and its corresponding guiding smooth roller 221 to be transmitted backward. A lateral limiting device is arranged across one of the guiding smooth rollers 221. The lateral limiting device includes two limiting frames 243 and a limiting wheel 244 rotatably mounted on the limiting frames 243. The limiting frame 243 is movably mounted on the smooth roller mounting platform 242, and can adjust its lateral position on the smooth roller mounting platform 242 respectively. The limiting wheels 244 on the two limiting frames 243 are arranged opposite to each other. The raw steel strip 91 is transmitted between the two limiting frames 243. The two side edges of the raw steel strip 91 abut against the limiting wheels 244, and the limiting wheels 244 are used to limit the lateral position of the raw steel strip 91 during transmission. A smooth roller passing hole is arranged in the middle of the limiting frame 243, and a material guiding smooth roller 221 is arranged through the smooth roller passing hole to support the raw steel strip 91 between the limiting wheels 244.

[0078] The slitting machine 3 is arranged at the rear end of the second smooth roller feeding stage 24, and the feeding port is arranged opposite to the feeding smooth roller 221 at the end of the second smooth roller feeding stage 24, so as to smoothly guide the raw steel strip 91 into the slitting machine 3. The slitting machine 3 cuts the raw steel strip 91 at multiple set positions at the same time under the condition of limiting the position of the raw steel strip 91, and obtains multiple product steel strips 92 of set width.

[0079] The receiving and leveling machine 4 is arranged at the discharge end of the slitting machine 3, and is used to pull and flatten the cut product steel strip 92. A specific receiving and leveling machine 4 is as follows: Figure 7 As shown, it includes a receiving platform 41, a front arc-shaped guide frame 42, a suspended inverted pit 43 and a rear arc-shaped guide frame 44. A plurality of receiving rollers 411 are arranged on the receiving platform 41, and a plurality of product steel strips 92 are conveyed backward along the receiving rollers 411. Some of the receiving rollers 411 can also be arranged to rotate under the drive of the driving mechanism, thereby increasing the driving force for driving the product steel strips 92 to convey the received material.

[0080] The front arc guide frame 42 is fixed at the discharge end of the receiving platform 41, and a plurality of receiving rollers 411 arranged in a downwardly curved arc shape are arranged on the front arc guide frame 42, so that the product steel strip forms a downwardly curved arc shape on the front arc guide frame 42. The overhanging recurved pit 43 is arranged adjacent to the front arc guide frame 42, and the product steel strip 92 guided by the front arc guide frame 42 enters the overhanging recurved pit 43, forms a reverse bend in the overhanging recurved pit 43, and enters the rear arc guide frame 44 arranged at the rear side of the overhanging recurved pit 43 upward.

[0081] The rear arc-shaped guide frame 44 is provided with a receiving roller 411, a separating and limiting roller 441 and a leading roller 442 arranged in an arc shape. The separating and limiting roller 441 is provided with a plurality of separating rings 443. Some product steel strips 92 are guided by the receiving roller 411 and transferred to the separating and limiting roller 441, and some product steel strips 92 bypass the receiving roller 411 and are directly transferred to the separating and limiting roller 441. The plurality of product steel strips 92 are respectively transferred backwards from between different separating rings 443 on the separating and limiting roller 441, so that different product steel strips 92 are formed with a certain spacing between them and then led out through the leading roller 442 with a large diameter.

[0082] The product steel strip 92 is bent again in the opposite direction on the rear arc guide frame 44. Through multiple reverse bending on the front arc guide frame 42, the overhanging inflection pit 43 and the rear arc guide frame 44, the deformation of the product steel strip 92 formed during the cutting process can be significantly reduced, thereby improving the straightness of the product steel strip 92.

[0083] The winder 5 is arranged at the rear end of the material receiving and leveling machine 4. The winder is provided with a winding shaft 51 and a driving mechanism for driving the winding shaft 51 to rotate. Through the rotation of the winding shaft 51, multiple product steel strips 92 are wound at different axial positions on the winding shaft 51 to form multiple material rolls of the product steel strips 92.

[0084] like Figure 5As shown, the EI type silicon steel sheet punching and shearing machine unit includes a coil rack 6, a steel strip leveling machine 7 and a silicon steel sheet punching and shearing machine 8 arranged in sequence. The coil rack 6 can be any mounting rack capable of mounting a coil of a product steel strip 92. One type of coil rack 6 includes a frame 61, on which a transverse support shaft 62 is disposed, on which a support sleeve 63 and an adjustment sleeve 64 are rotatably mounted, and on which an adjustment tie rod ring 65 is threadedly connected, and by rotating the adjustment sleeve 64, the axial position of the adjustment tie rod ring 65 on the adjustment sleeve 64 can be adjusted. The adjusting rod ring 65 is connected to the support sleeve 63 through a plurality of rods 66. The outer side of the support sleeve 63 is hinged with a plurality of hinged rods 67 in groups. The other end of each group of hinged rods 67 is hinged with a coil support block 68. The plurality of coil support blocks 68 are supported in the central hole of the product steel strip 92 coil, and the product steel strip 92 is installed on the coil rack 6 and can rotate around the transverse support shaft 62. The distance between the plurality of coil support blocks 68 and the support sleeve 63 can be adjusted by rotating the adjusting sleeve 64, so as to facilitate the installation and support fixation of the product steel strip 92 coil on the coil rack 6.

[0085] The steel strip leveler 7 includes a steel strip feeding mechanism 71, a first guide plate group 72, a second guide plate 73 and a third guide plate 74. The steel strip feeding mechanism 71 is arranged adjacent to the coil rack 6 and can drive the product steel strip 92 to be transmitted toward the silicon steel sheet punching machine 8. The first guide plate group 72, the second guide plate 73 and the third guide plate 74 are arranged in sequence from the steel strip feeding mechanism 71 to the silicon steel sheet punching machine 8, and can respectively guide the product steel strip 92 to form a circular arc-shaped smooth bend in opposite directions, thereby leveling the product steel strip 92 and improving the flatness of the product steel strip 92.

[0086] The silicon steel sheet punching machine 8 is arranged at the rear end of the steel strip leveling machine 7. A punching station is arranged on the silicon steel sheet punching machine 8. A punching die is arranged on the punching station. The punching die can be used to punch the product steel strip 92. The EI type silicon steel sheet is stamped and formed through a punching stroke of the punching die to obtain E-shaped silicon steel sheets and I-shaped silicon steel sheets.

[0087] In some embodiments of the EI type silicon steel sheet production equipment of the present application, as Figure 5 As shown, a receiving mechanism 25 for supporting the raw steel strip 91 and preventing the raw steel strip 91 from excessive bending is provided at the feeding end of the feeder 21 .

[0088] The material receiving mechanism 25 includes a material receiving frame 251, a material receiving plate 252 and a material receiving frame retracting and releasing driving mechanism 253. The material receiving frame 251 is arranged on both sides of the feed port of the feeder 21, and the ends of the material receiving frame 251 are hinged to the feeder 21, usually hinged to hinge blocks fixed on both sides of the feed port of the feeder 21. The material receiving plate 252 is fixed to the material receiving frame 251, and can rotate up and down below the feed port of the feeder 21 together with the material receiving frame 251. The material receiving frame retracting and releasing driving mechanism 253 can be various driving mechanisms that can drive the material receiving frame 251 to rotate on the feeder 21, and usually a driving hydraulic cylinder is used. One end of the driving hydraulic cylinder is hinged to the feeder 21, and the other end is hinged to the receiving rack 251. When the driving hydraulic cylinder is extended, it can push the receiving rack 251 to open in the direction of the uncoiler 1, so that the end of the receiving plate 252 extends to the vicinity of the uncoiler 1, and the raw steel strip 91 unfolded on the uncoiler 1 is supported on the receiving plate 252 to prevent excessive bending of the raw steel strip 91; when the driving hydraulic cylinder is retracted, it can pull the receiving rack 251 to fold obliquely to the bottom of the feed port of the feeder 21, so that the receiving plate 252 is away from the coiler 1, and a larger operating space is opened near the uncoiler 1, which is convenient for the installation of the raw steel strip 91 coil on the uncoiler 1 and other operations.

[0089] In some embodiments of the EI type silicon steel sheet production equipment of the present application, as Figure 6 As shown, an upper knife holder 31 and a lower knife holder 32 are provided on the slitting machine 3. The upper knife holder 31 and the lower knife holder 32 are arranged transversely on the slitting machine 3, and can rotate in opposite directions under the drive of the driving mechanism. Usually, the lower knife holder 32 is rotatably connected to a fixed position on the slitting machine 3, and the upper knife holder 31 is rotatably connected above the lower knife holder 32. A knife holder position adjustment device is provided between the upper knife holder 31 and the frame of the slitting machine 3, and the position of the upper knife holder 31 on the slitting machine 3 can be adjusted by the knife holder position adjustment device, thereby adjusting the distance between the upper knife holder 31 and the lower knife holder 32.

[0090] The upper tool holder 31 and the lower tool holder 32 each include a tool holder rotating shaft 311, a longitudinal shear blade 312 and a blade spacer 313. The two ends of the tool holder rotating shaft 311 are rotatably connected to the frame of the longitudinal shearing machine 3. The longitudinal shear blade 312 is a circular shearing blade, and a straight or inclined blade edge is arranged on the outer peripheral surface of the longitudinal shear blade 312. The longitudinal shear blade 312 is coaxially mounted on the tool holder rotating shaft 311, and the blade spacer 313 is sleeved on the tool holder rotating shaft 311. A blade spacer 313 is installed between every two adjacent longitudinal shear blades 312. A fastening sleeve is arranged at both ends of the tool holder rotating shaft 311, and a plurality of blade spacers 313 and a plurality of longitudinal shear blades 312 are clamped and fixed on the tool holder rotating shaft 311 between the fastening sleeves by rotating the fastening sleeves. The height of the blade spacer 313 between the longitudinal shear blades 312 determines the distance between two adjacent longitudinal shear blades 312, that is, the height of the product steel strip 92 cut by the two longitudinal shear blades 312.

[0091] The fixing method of clamping the longitudinal cutting blade 312 between the blade spacers 313 on both sides makes the fixing position of the longitudinal cutting blade 312 more stable. By controlling the height of the blade spacers 313, the width of the product steel strip 92 cut by the longitudinal cutting blade 312 can be accurately controlled, thereby ensuring the cutting accuracy of the width of the product steel strip 92.

[0092] The longitudinal cutting blades 312 on the upper tool holder 31 and the lower tool holder 32 and the blade spacer 313 arranged between the longitudinal cutting blades 312 are arranged correspondingly, so that the longitudinal cutting blades 312 on the upper tool holder 31 and the lower tool holder 32 are arranged one by one, and the distance between the corresponding longitudinal cutting blades 312 is the same. The lateral position of the longitudinal cutting blades 312 on the upper tool holder 31 and / or the lower tool holder 32 can also be adjusted by adjusting the fastening sleeve, and the distance between the upper tool holder 31 and the lower tool holder 32 is adjusted by the tool holder position adjustment device, so that the longitudinal cutting blades 312 on the upper tool holder 31 and the corresponding longitudinal cutting blades 312 on the lower tool holder 32 overlap slightly and stick to each other, and the upper tool holder 31 and the lower tool holder 32 are rotated to cut multiple lateral positions of the raw steel strip 91 passing between the upper tool holder 31 and the lower tool holder 32 to obtain multiple product steel strips 92.

[0093] A feed end bracket 33 is provided at the feed end of the slitting machine 3, and a discharge end bracket 34 is provided at the discharge end, and both the feed end bracket 33 and the discharge end bracket 34 are arranged in parallel with the upper knife holder 31 and the lower knife holder 32. A pair of steel strip pressure strips 35 are arranged between the feed end bracket 33 and the discharge end bracket 34, and the plurality of steel strip pressure strips 35 are parallel to each other and longitudinally arranged in a direction perpendicular to the knife holder rotating shaft 311 at a position corresponding to the blade spacer 313, and a gap is left at a position corresponding to the slitting blade 312, so that the slitting blade 312 can cut the raw steel strip 91 through the gap.

[0094] Specifically, the steel strip pressure strip 35 is provided with two layers, the two ends of the upper steel strip pressure strip 35 are respectively elastically connected to the feed end bracket 33 and the discharge end bracket 34 by springs, and the two ends of the lower steel strip pressure strip 35 are respectively fixed on the longitudinal shear 3 below the feed end bracket 33 and the discharge end bracket 34, or fixed on the lower mounting strip of the feed end bracket 33 and the discharge end bracket 34, and the raw steel strip 91 and the product steel strip 92 formed by longitudinally cutting the raw steel strip 91 pass between the upper and lower layers of the steel strip pressure strip 35.

[0095] The upper steel strip pressure strip 35 generates a pressing force in the direction of the lower steel strip pressure strip 35 under the action of the spring, pressing the raw steel strip 91 or the product steel strip 92 between the upper and lower steel strip pressure strips 35, preventing the raw steel strip 91 or the product steel strip 92 on both sides of the longitudinal cutting blade 312 from moving when the longitudinal cutting blade 312 cuts the raw steel strip 91, thereby affecting the width accuracy of the product steel strip 92 obtained by cutting and the straightness of the cutting line. The gap between the steel strip pressure strips 35 corresponding to the longitudinal cutting blade 312 can also provide an appropriate amount of deformation of the edge of the product steel strip 92 during cutting, preventing the edge of the product steel strip 92 on both sides of the cutting line from tearing. The multiple steel strip pressure strips 35 arranged longitudinally can not only ensure the backward transmission of the raw steel strip 91 and the product steel strip 92, but also play a certain role in preventing the lateral deviation of the raw steel strip 91 and the product steel strip 92.

[0096] In some embodiments of the EI type silicon steel sheet production equipment of the present application, as Figures 8 to 13 As shown, a limiting groove 83 is provided at the feeding end of the silicon steel sheet punching machine 8, and the product steel strip 92 is transported from the limiting groove 83 to the punching station of the silicon steel sheet punching machine 8. A steel strip feeding mechanism is provided between the limiting groove 83 and the punching station, and the steel strip feeding mechanism drives the product steel strip 92 to feed into the punching station.

[0097] The punching die set in the punching station includes a punching upper die 81 and a punching lower die 82. Fig. 9 and Fig.10 As shown, an elastic pressing block 811, a punching column 812, a material-breaking protrusion 813 and a cutting blade 814 are respectively arranged on the punching upper die 81. The elastic pressing block 811 is arranged relative to the sheet body position of the EI-shaped silicon steel sheet on the product steel strip 92, and is usually arranged relative to the middle column of the E-shaped silicon steel sheet. An inwardly concave pressing block groove 815 is arranged on the punching upper die 81, and the elastic pressing block 811 is slidably installed in the pressing block groove 815. A spring is arranged between the elastic pressing block 811 and the bottom of the pressing block groove 815, so that the elastic pressing block 811 generates a pushing force toward the outside of the pressing block groove 815, so that the product steel strip 92 can be pressed on the punching lower die 82 through the elastic pressing block 811 to prevent the position of the product steel strip 92 from moving during the punching process.

[0098] The punching columns 812 are respectively arranged at positions on the punching upper die 81 corresponding to the multiple positioning holes on the EI type silicon steel sheet. The punching columns 812 can be used to punch and form positioning holes on the EI type silicon steel sheet on the product steel strip 92.

[0099] The cutting protrusion 813 is arranged on the punching upper die 81 at a position corresponding to the window hole of the E-shaped silicon steel sheet of the EI-type silicon steel sheet. The cutting protrusion 813 can be used to punch and form the window hole of the E-shaped silicon steel sheet.

[0100] The cutting blade 814 is set corresponding to the two long sides of the EI type silicon steel sheet in the width direction, and can punch and cut the two long sides of the E-shaped silicon steel sheet in the width direction, and can also be used to punch and cut the two long sides of the I-shaped silicon steel sheet.

[0101] The height of the elastic pressing block 811 in the free state, the end face height of the punching column 812, the height of the material-cutting protrusion 813 and the height of the cutting blade 814 decrease in sequence. When the punching upper die 81 moves toward the punching lower die 82, the elastic pressing block 811 first contacts the product steel strip 92, and presses the product steel strip 92 to fix it on the punching lower die 82 under the action of the spring, thereby fixing the position of the product steel strip 92. As the punching upper die 81 moves toward the punching lower die 82, the elastic pressing block 811 first contacts the product steel strip 92, and presses the product steel strip 92 to fix it on the punching lower die 82, thereby fixing the position of the product steel strip 92. The punching column 812 moves and contacts the product steel strip 92, and punches out a positioning hole for an EI type silicon steel sheet on the product steel strip 92; then, the cutting protrusion 813 contacts the product steel strip 92, and punches out a window hole for an E-shaped silicon steel sheet on the product steel strip 92; finally, the cutting blade 814 contacts the product steel strip 92, and cuts off the EI type silicon steel sheet from the product steel strip 92. If necessary, an I-shaped silicon steel sheet can also be punched out from the product steel strip 92.

[0102] like Figures 11 to 13 As shown, a die cavity having a width equal to the length of the EI type silicon steel sheet is provided on the punching lower die 82, and the die cavity is used to limit the lateral position of the product steel strip 92, so that the two side edges of the product steel strip 92 are directly used as the side edges on both sides of the length direction of the EI type silicon steel sheet. A limiting structure can be set on the discharge side of the die cavity to limit the feeding position of the product steel strip 92, or the feeding position of the product steel strip 92 can be controlled by a fixed-length feeding mechanism, so that the end face of the product steel strip 92 is used as a long side of the EI type silicon steel sheet.

[0103] The die cavity is provided with a punching die hole 821, a forming die groove 822 and a cutting groove 823. The position and size of the punching die hole 821 are matched with the punching column 812, the position and size of the forming die groove 822 are matched with the cutting protrusion 813, and the position and width of the cutting groove 823 are matched with the cutting blade 814.

[0104] The punching lower die 82 is fixed in the punching station of the silicon steel sheet punching machine 8, and the punching upper die 81 is fixed above the punching lower die 82 through the positioning column 84, and is supported by a spring at a certain distance above the punching lower die 82. A pulling rod 85 is arranged on the punching upper die 81, which passes through the punching lower die 82 and extends to the bottom of the punching station. Under the drive of a driving mechanism such as a cam arranged at the bottom of the silicon steel sheet punching machine 8, the pulling rod is periodically pulled downward, driving the punching upper die 81 to periodically descend, and cooperate with the punching lower die 82 to punch the product steel strip 92 once to obtain an E-shaped silicon steel sheet and an I-shaped silicon steel sheet. During the rising process of the punching upper die 81, the E-shaped silicon steel sheets and the I-shaped silicon steel sheets are discharged from the die cavity, wherein the E-shaped silicon steel sheets slide toward the two receiving rods 86 arranged at the discharge end of the silicon steel sheet punching and shearing machine 8 under the action of gravity, and are supported on the two receiving rods 86 through the window holes, and are arranged and stacked on the receiving rods 86; the I-shaped silicon steel sheets can be collected into the barrel below the discharge end of the silicon steel sheet punching and shearing machine 8, or they can be arranged in a directional manner through a gradually narrowing material guide trough.

[0105] In a preferred embodiment of the EI type silicon steel sheet production equipment of the present application, as Figures 9 to 13 As shown, the material-cutting protrusion 813 on the punching upper die 81 is set to correspond to the window holes of two oppositely arranged E-shaped silicon steel sheets. The material-cutting protrusion 813 can punch two connected window holes on the two E-shaped silicon steel sheets at the same time, and the blanking formed by punching the two connected window holes is used as an I-shaped silicon steel sheet. In this way, two I-shaped silicon steel sheets can be obtained by blanking the two connected window holes on the two E-shaped silicon steel sheets. At the same time, the punching column 812 on the punching upper die 81 is also set at a position corresponding to the E-shaped silicon steel sheets with two window holes arranged oppositely and the positioning holes on the two I-shaped silicon steel sheets corresponding to the positions of the window holes of the E-shaped silicon steel sheets; the cutting blade 814 is set to a position corresponding to the shear line between the two E-shaped silicon steel sheets and the shear line between the product steel strip 92 and the E-shaped silicon steel sheet, respectively, and the two side edges of the product steel strip 92 are used to form the edges on both sides of the length direction of the E-shaped silicon steel sheet. In this way, two E-shaped silicon steel sheets and two I-shaped silicon steel sheets can be punched out from a product steel strip 92 whose length is equal to the sum of the widths of the two E-shaped silicon steel sheets.

[0106] An I-shaped die table 824 is provided in the forming die groove 822 on the punching lower die 82. The shape and size of the I-shaped die table 824 match the forming die groove 822, so that the I-shaped die table 824 can slide up and down in the forming die groove 822. A return spring is provided between the I-shaped die table 824 and the bottom of the forming die groove 822, so that the upper end surface of the I-shaped die table 824 can be pushed by the return spring to return to a height flush with the opening of the forming die groove 822.

[0107] A punching die hole 821 corresponding to the positioning hole on the I-shaped silicon steel sheet is provided on the I-shaped die table 824, and a horizontally arranged clamping hole 825 connected to the punching die hole 821 is provided on the upper part of the I-shaped die table 824. A pressure slide bar 826 capable of sliding in the clamping hole 825 is provided in the clamping hole 825, one end of the pressure slide bar 826 can extend into the punching die hole 821, and an inclined plane facing upward is provided at the end, or an inclined arc surface is provided at the end. An elastic column hole 827 is arranged on the side wall of the forming die groove 822 and is arranged opposite to the clamping hole 825. A locking block 828 is slidably arranged in the elastic column hole 827. A locking block spring is arranged between one end of the locking block 828 and the bottom wall of the elastic column hole 827. The other end of the locking block 828 can extend into the clamping hole 825 and abut against the pressure slide bar 826 under the action of the locking block spring. The I-shaped die table 824 is locked in the forming die groove 822 by using the locking block 828, so that the top surface of the I-shaped die table 824 is ensured to be flush with the bottom surface of the die cavity of the punching lower die 82, to ensure that the I-shaped silicon steel sheet will not be significantly deformed when punching.

[0108] When the positioning hole is punched, the punching column 812 enters the punching die hole 821, and the punching column 812 squeezes the end of the pressure slide 826, pushing the pressure slide 826 and the locking block 828 to move toward the elastic column hole 827. When the side of the punching column 812 abuts against the end face of the pressure slide 826, the abutting surface of the pressure slide 826 and the locking block 828 is flush with the wall of the forming die groove 822. In this way, the cutting protrusion 813 can push the I-shaped die platform 824 down, and the side wall of the cutting protrusion 813 cooperates with the side wall of the forming die groove 822 to punch out the I-shaped silicon steel sheet from the position corresponding to the window hole of the E-shaped silicon steel sheet on the product steel strip 92. As the punching upper die 81 moves further downward, the cutting protrusion 813 pushes the I-shaped silicon steel sheet into the forming die groove 822, so that when the cutting blade 814 cuts and separates the two E-shaped silicon steel sheets, the I-shaped silicon steel sheet will not be damaged.

[0109] In the description of the present application, the description with reference to the terms "one embodiment", "specific embodiment", "preferred embodiment", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0110] 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 production process for EI type silicon steel sheet, characterized in that: The steps include: S1. Slitting: Cut the raw steel strip longitudinally into product steel strips of set width according to the size requirements of EI type silicon steel sheets, and wind them into coils; S2. Punching silicon steel sheets: Use the product steel strip with the same width as the total length of EI type silicon steel sheets for edgeless punching, and obtain E-shaped silicon steel sheets and I-shaped silicon steel sheets at a single station.

2. The EI type silicon steel sheet production process according to claim 1, characterized in that: Step S1 includes the following steps: S1.

1. Raw steel strip uncoiling: uncoiling the raw steel strip from the coil and conveying it to the working platform; S1.2, conveying and flattening the raw steel strip: driving the raw steel strip to be conveyed along the working platform and flattening it during the conveying process; S1.3, lateral limit: limit the lateral position of the raw steel strip when it is conveyed on the working platform; S1.4, Positioning longitudinal cutting: lock the position of the raw steel strip on both sides of the cutting line, and cut the raw steel strip into multiple product steel strips according to the set width; S1.5, Leveling and coiling: flatten multiple product steel strips and coil them separately.

3. The EI type silicon steel sheet production process according to claim 2, characterized in that: In step S1.2, the raw steel strip is flattened by setting a roller array on the conveying path of the raw steel strip; in step S1.4, the width of the product steel strip formed by cutting is controlled by setting a plurality of longitudinal shear blades close to each other on the upper and lower longitudinal shear frames and setting spacers of set width between adjacent longitudinal shear blades; the raw steel strip is clamped by setting elastic strips at positions corresponding to the spacers between the upper and lower longitudinal shear frames to lock the position of the raw steel strip on both sides of the cutting line.

4. The EI type silicon steel sheet production process according to claim 1, characterized in that: Step S2 includes the following steps: S2.

1. Uncoiling of product steel strip: Uncoiling the product steel strip from the coil; S2.2, feeding and leveling: drive the product steel strip to be conveyed, and level the product steel strip during the conveying process; S2.3, fixed position transfer: transfer the product strip from a defined position to the punching station; S2.4, Positioning punching: After the product strip is pressed and positioned, the product strip is punched with positioning holes, the EI silicon steel sheet is punched and formed, and the edges are cut in one action, and E-shaped silicon steel sheets and I-shaped silicon steel sheets are obtained at the same time; S2.

5. Silicon steel sheet collection: E-shaped silicon steel sheets and I-shaped silicon steel sheets are stacked and collected for later use.

5. The EI type silicon steel sheet production process according to claim 4, characterized in that: In step S2.4, a product steel strip having a width equal to the total length of the EI-type silicon steel sheet is used, and the openings of the two E-shaped silicon steel sheets are punched out simultaneously with each other. The two window holes of the two E-shaped silicon steel sheets are used to punch out the two I-shaped silicon steel sheets respectively, and two E-shaped silicon steel sheets and two I-shaped silicon steel sheets are obtained by one punching operation.

6. An EI type silicon steel sheet production equipment, characterized in that: The invention comprises a slitting and dividing machine group and an EI type silicon steel sheet punching and shearing machine group, wherein the slitting and dividing machine group comprises an unwinder (1), a feeder table (2), a slitting machine (3), a material receiving and leveling machine (4) and a rewinder (5), wherein the feeder table (2) is arranged on the side of the unwinder (1), and comprises a feeder (21), a first smooth roller guide table section (22), a roller spreading platform section (23) and a second smooth roller guide table section (24) arranged in sequence, wherein a roller array is arranged on the roller spreading platform section (23), and the second smooth roller guide table section (24) is provided with a roller array. A power roller (241) and a transverse limit device are arranged on the smooth roller feeding table section (24); the EI type silicon steel sheet punching and shearing machine group comprises a coil rack (6), a steel strip leveling machine (7) and a silicon steel sheet punching and shearing machine (8) arranged in sequence; the coil rack (6) can be equipped with a product steel strip coil and release a product steel strip from the product steel strip coil; the steel strip leveling machine (7) can level the product steel strip; and the silicon steel sheet punching and shearing machine (8) can use the product steel strip to perform single-station one-time stamping and forming of the EI type silicon steel sheet.

7. The EI type silicon steel sheet production equipment according to claim 6, characterized in that: The feeding end of the feeder (21) is provided with a material receiving mechanism (25), and the material receiving mechanism (25) comprises a material receiving frame (251), a material receiving plate (252) and a material receiving frame retracting and releasing driving mechanism (253). The material receiving frame (251) is hinged at the feeding port of the feeder (21), the material receiving plate (252) is fixed on the material receiving frame (251), and the material receiving frame retracting and releasing driving mechanism (253) is arranged between the feeder (21) and the material receiving frame (251), so as to be able to drive the material receiving frame (251) to open in the direction of the uncoiler (1), or to be obliquely folded below the feeding port of the feeder (21).

8. The EI type silicon steel sheet production equipment according to claim 6, characterized in that: The slitting machine (3) comprises an upper knife frame (31) and a lower knife frame (32), the upper knife frame (31) and the lower knife frame (32) being arranged opposite to each other on the slitting machine (3), a feeding end bracket (33) being arranged at the feeding end of the upper knife frame (31) and the lower knife frame (32), and a discharging end bracket (34) being arranged at the discharging end; the upper knife frame (31) and the lower knife frame (32) each comprise a knife frame rotating shaft (311), a slitting blade (312) and a blade spacer (313), the slitting blade (312) being arranged on the knife frame rotating shaft (311), and a blade spacer (313) being arranged on the knife frame rotating shaft (311). 1) A blade spacer (313) of a set width is respectively arranged between the upper and lower adjacent longitudinal shear blades (312); a plurality of steel strips (35) perpendicular to the rotary shaft (311) of the blade holder and arranged in pairs up and down are arranged between the blade spacers (313) of the upper and lower blade holders, the two ends of the upper steel strips (35) being elastically connected to the feed end bracket (33) and the discharge end bracket (34), respectively, and the two ends of the lower steel strips (35) being fixed to the longitudinal shearing machine (3) below the feed end bracket (33) and the discharge end bracket (34).

9. The EI type silicon steel sheet production equipment according to claim 6, characterized in that: The silicon steel sheet punching machine (8) comprises a punching upper die (81) and a punching lower die (82); the punching upper die (81) is provided with an elastic pressing block (811), a punching column (812), a material breaking protrusion (813) and a cutting blade (814); the elastic pressing block (811) is slidably arranged in a pressing block groove (815) on the punching upper die (81) and can slide outward of the pressing block groove (815) under the action of a spring; the punching column (812) is arranged corresponding to a positioning hole on the EI type silicon steel sheet; the material breaking protrusion (813) is arranged corresponding to a window hole of the EI type silicon steel sheet; the cutting blade (814) is arranged corresponding to a long side; the elastic pressing block (811) is arranged at a position corresponding to the positioning hole on the EI type silicon steel sheet; the material breaking protrusion (813) is arranged corresponding to a window hole of the EI type silicon steel sheet; the cutting blade (814) is arranged corresponding to a long side; and the elastic pressing block (811) is arranged at a position corresponding to the positioning hole on the EI type silicon steel sheet. The height in a free state, the end face height of the punching column (812), the height of the material-breaking protrusion (813) and the height of the cutting blade (814) decrease in sequence; a punching die hole (821), a forming die groove (822) and a cutting groove (823) are provided in the die cavity of the punching lower die (82); the punching die hole (821) is matched with the punching column (812), the forming die groove (822) is matched with the material-breaking protrusion (813), and the cutting groove (823) is matched with the cutting blade (814); the punching upper die (81) can cooperate with the punching lower die (82) to simultaneously complete the punching processing of E-shaped silicon steel sheets and I-shaped silicon steel sheets.

10. The EI type silicon steel sheet production equipment according to claim 9, characterized in that: The punching upper die (81) is provided with punching columns (812) corresponding to the positioning holes on the two E-shaped silicon steel sheets and the two I-shaped silicon steel sheets, the cutting protrusion (813) corresponds to the window holes of the two oppositely arranged E-shaped silicon steel sheets and the two I-shaped silicon steel sheets, and the cutting blade (814) corresponds to the shear line between the two E-shaped silicon steel sheets and the shear line between the product steel strip and the E-shaped silicon steel sheet respectively; the finished product An I-shaped die table (824) is arranged in the mold groove (822), a return spring is arranged between the I-shaped die table (824) and the groove bottom of the molding die groove (822), the I-shaped die table (824) is provided with the punching die hole (821) corresponding to the positioning hole on the I-shaped silicon steel sheet, and a clamping hole (825) connected to the punching die hole (821) is arranged on the upper part, and a pressure spring is arranged in the clamping hole (825). A slide bar (826), one end of the pressure slide bar (826) is provided with an inclined surface extending into the punching die hole (821), the side wall of the forming die groove (822) is provided with an elastic column hole (827) arranged opposite to the clamping hole (825), a locking block (828) is arranged in the elastic column hole (827), a locking block spring is arranged between one end of the locking block (828) and the bottom wall of the elastic column hole (827), and the other end can extend into the clamping hole (825) and abut against the pressure slide bar (826) under the action of the locking block spring, and when the punching column (812) enters the punching die hole (821), the punching column (812) can push the pressure slide bar (826) so that the abutting surface of the pressure slide bar (826) and the locking block (828) is flush with the wall of the forming die groove (822).

Images