High-precision machining progressive die for silicon steel sheet

Abstract

The invention discloses a high-precision machining progressive die for silicon steel sheets, and relates to the technical field of progressive dies, the high-precision machining progressive die comprises a top plate and a base, an upper die is fixedly mounted at the bottom of the top plate, a lower die is fixedly mounted at the top of the base, and a cooling structure is mounted at the top of the upper die; the cooling structure comprises an air chamber fixedly installed at the top of the upper die, two air pipes are fixedly connected to one side of the air chamber, air injection rods are fixedly connected to one ends of the two air pipes, air injection units are arranged outside the two air injection rods, and a plurality of nozzles are arranged on the outer walls of the air injection units. According to the high-precision machining progressive die for the silicon steel sheet, surrounding type heat dissipation of the tool bit is achieved through vortex-shaped airflow, heat dissipation uniformity is guaranteed in cooperation with a pressure stabilizing structure, overheating of the tool bit is effectively relieved, burr fluctuation is reduced, meanwhile, the situation that the machining efficiency is reduced due to the fact that a control system is purely depended on is avoided, and the problem of uneven heat distribution is solved from the structural level; and the product machining precision is obviously improved.

Description

Technical Field

[0001] This invention relates to the field of progressive die technology, and in particular to a high-precision progressive die for machining silicon steel sheets. Background Technology

[0002] The high-precision progressive die for silicon steel sheets (also known as a continuous die) is a precision stamping die used for the mass production of core parts for electrical appliances such as motors and transformers. In a single stroke of the press, the strip silicon steel material completes multiple processes such as punching, cutting, riveting, and even leveling and shaping at multiple stations in sequence, ultimately producing complex parts such as stator laminations and rotor laminations efficiently and directly.

[0003] In the actual use of high-precision progressive dies for machining silicon steel sheets, the difference in heat accumulation in different stations and areas during continuous high-speed stamping of hard and brittle tungsten steel coils causes non-uniform thermal expansion, resulting in dynamic gap thermal drift. In particular, overheating at the die cutter head may lead to problems such as product burr fluctuations, reduced product quality, accelerated cutting edge wear, and reduced die life. Simply relying on the control system for intermittent machining control will reduce machining efficiency and cannot solve the problem of uneven heat distribution at the structural level.

[0004] Therefore, a high-precision progressive die for machining silicon steel sheets is proposed to address the above problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies and issues such as overheating during long-term mold processing, a high-precision progressive mold for machining silicon steel sheets is proposed.

[0006] The technical solution adopted by this invention to solve its technical problem is: a high-precision progressive die for machining silicon steel sheets, including a top plate and a base. An upper die is fixedly installed at the bottom of the top plate, and a lower die is fixedly installed at the top of the base. A cooling structure is installed at the top of the upper die. The cooling structure includes an air chamber fixedly installed at the top of the upper die. Two sets of air pipes are fixedly connected to one side of the air chamber. One end of each of the two sets of air pipes is fixedly connected to an air jet rod. An air jet unit is provided on the outside of each of the two air jet rods. Several nozzles are provided on the outer wall of the air jet unit. The included angle between the several nozzles and the air jet rods gradually decreases. The airflow sprayed by the air jet units located on both sides of the upper die and both sides of the lower die can respectively form vortex airflows around the upper die cutter head and the lower die cutter head.

[0007] Preferably, a following assembly is installed on the top of the air chamber. The following assembly includes a mounting plate installed at the bottom of the top plate. A slide rod is fixedly connected to the bottom of the mounting plate. A piston plate is slidably connected inside the air chamber. The top of the piston plate is fixedly connected to the bottom of the slide rod. A gear is fixedly connected to the bottom of the mounting plate. A gearbox is installed on one side of the air chamber. A transmission gear is provided at the input end of the gearbox. The outer wall of the transmission gear meshes with a rack. The output end of the gearbox is fixedly connected to one end of the jet rod located above. A feeding platform and a discharging platform are fixedly connected to both ends of the base, respectively.

[0008] Preferably, a limiting frame is fixedly connected to the side of the air chamber away from the lower mold, and a pressure-stabilizing airbag communicating with the top of the air chamber is provided inside the limiting frame.

[0009] Preferably, the jet rod is provided with a sealing assembly inside. The sealing assembly includes several elastic telescopic rods installed inside the jet rod. The output end of the elastic telescopic rod is fixedly connected to a rubber sealing block. The outer wall of the rubber sealing block is inserted into the air outlet of the jet rod.

[0010] Preferably, a venting block is fixedly connected inside the jet unit, one end of the venting block abuts against one end of the rubber sealing block, and the outer wall of the venting block has a venting channel connecting the inside of the jet rod and the inside of the jet unit.

[0011] Preferably, the surface of the upper mold is provided with an auxiliary component, the auxiliary component including a slag discharge channel formed on the surface of the lower mold, and a wedge plate is fixedly connected to the top of the slag discharge channel, the wedge plate being located between the air chamber and the opposite surface of the lower mold.

[0012] Preferably, the auxiliary component further includes an air jet box fixedly connected inside the slag discharge channel, and a circular pipe communicating with the air chamber is fixedly connected to the bottom of the air chamber, with the bottom end of the circular pipe communicating with the interior of the air jet box.

[0013] Preferably, the air outlet of the jet box is provided with a filter screen.

[0014] Preferably, a solenoid valve is installed on the outside of the circular tube. The solenoid valve remains unobstructed when the jet box is drawing in air and opens intermittently when the jet box is discharging air, forming a pulsed jet airflow.

[0015] Preferably, it also includes a system control module, which is communicatively connected to the control system of the silicon steel sheet processing equipment and is used to automatically adjust the opening and closing of the solenoid valve according to the operating status of the upper mold; The system control module includes a pressure monitoring unit, an operation linkage unit, and a pulse control unit. The pressure monitoring unit is integrated inside the air chamber and is used to collect air pressure data inside the air chamber in real time. The operation linkage unit receives the upper mold operation signal sent by the silicon steel sheet processing equipment control system. The operation signal includes the upper mold's downward processing signal and upward return signal. The pulse control unit is electrically connected to the air pressure monitoring unit, the operation linkage unit and the solenoid valve respectively. When the air pressure monitoring unit detects that the air pressure in the air chamber reaches the preset threshold and the operation linkage unit receives the upper mold downward processing signal, the pulse control unit triggers the solenoid valve to open for a predetermined time and then automatically closes, so that the jet box generates a circulating pulse airflow. The preset threshold and the solenoid valve opening time can be configured through the control system of the silicon steel sheet processing equipment to achieve adjustable and controllable pulse airflow intensity.

[0016] Due to the adoption of the above technical solution, the technical progress achieved by this invention compared to the prior art is as follows: This invention provides a high-precision progressive die for machining silicon steel sheets. It achieves vortex-like airflow for surrounding heat dissipation of the cutting head, and is combined with a voltage stabilizing structure to ensure uniform heat dissipation. This effectively alleviates overheating of the cutting head, reduces burr fluctuations, and avoids the reduction in machining efficiency caused by relying solely on the control system. It solves the problem of uneven heat distribution from a structural perspective and significantly improves the machining accuracy of the product.

[0017] This invention provides a high-precision progressive die for machining silicon steel sheets. Through the coordinated operation of the jet unit and the jet box, pulse jetting and negative pressure suction are achieved in the stamping and return stages, respectively. Combined with the centrifugal force of the vortex airflow and the guiding effect of the wedge plate, the die efficiently collects and discharges debris, avoiding secondary frictional heating and cutting edge wear caused by debris accumulation. At the same time, it prevents debris from contaminating the feeding and discharging areas, keeps the die clean, and extends the service life of the die.

[0018] This invention provides a high-precision progressive die for machining silicon steel sheets. Through the adjustable design between the jet unit and the jet rod, the installation method and position can be flexibly adjusted according to the number and position of the cutter heads, adapting to the processing requirements of parts of different specifications. The system control module is linked with the processing equipment control system to realize automatic switching of airflow state and adjustable parameters, improving the equipment's versatility and intelligence, and reducing the cost of manual intervention.

[0019] This invention provides a high-precision progressive die for machining silicon steel sheets. Through the coordinated cooperation of various structural components, a complete heat dissipation and slag removal system is formed. The pressure stabilizing structure ensures stable airflow, the sealing component prevents airway blockage, the filter screen avoids debris backflow, and the pulsed airflow enables the filter screen to self-clean. The entire system operates smoothly and reliably, ensuring both heat dissipation and slag removal effects while reducing equipment maintenance frequency and workload, thus balancing processing efficiency and ease of use. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the lower mold structure of the present invention; Figure 3 This is a schematic diagram of the slag discharge channel structure of the present invention; Figure 4 This is a partial structural schematic diagram of the cooling structure of the present invention; Figure 5 This is a schematic diagram of the jet unit structure of the present invention; Figure 6 This is a schematic diagram of the airbag structure of the present invention; Figure 7 This is a schematic diagram of the internal structure of the air chamber of the present invention; Figure 8 This is a schematic diagram of the transmission gear structure of the present invention; Figure 9 This is a schematic diagram of the internal structure of the jet rod of the present invention; Figure 10 For the present invention Figure 9 Enlarged view of point A in the image; Figure 11 This is a logic flowchart of the control system of the present invention.

[0021] In the diagram: 1. Top plate; 11. Upper mold; 2. Base; 21. Lower mold; 3. Feeding platform; 4. Discharge platform; 5. Cooling structure; 51. Air chamber; 511. Piston plate; 512. Limiting frame; 513. Pressure stabilizing airbag; 52. Air pipe; 54. Air jet rod; 55. Air jet unit; 56. Nozzle; 57. Follower assembly; 571. Mounting plate; 572. Gearbox; 573. Rack; 574. Transmission gear; 58. Sealing assembly; 581. Elastic telescopic rod; 582. Rubber sealing block; 583. Ventilation block; 59. Auxiliary assembly; 591. Slag discharge channel; 592. Wedge plate; 593. Solenoid valve; 594. Air jet box; 595. Filter screen; 6. System control module; 61. Air pressure monitoring unit; 62. Operation linkage unit; 63. Pulse control unit. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Specific implementation examples are given below.

[0024] Please see Figure 1 - Figure 11This invention provides a technical solution: a high-precision progressive die for machining silicon steel sheets, comprising a top plate 1 and a base 2. An upper die 11 is fixedly installed at the bottom of the top plate 1, and a lower die 21 is fixedly installed at the top of the base 2. A cooling structure 5 is installed at the top of the upper die 11. The cooling structure 5 includes an air chamber 51 fixedly installed at the top of the upper die 11. Two sets of air pipes 52 are fixedly connected to one side of the air chamber 51. One end of each set of air pipes 52 is fixedly connected to an air jet rod 54. An air jet unit 55 is provided on the outside of each of the two air jet rods 54. A plurality of nozzles 56 are provided on the outer wall of the air jet unit 55. The included angle between the plurality of nozzles 56 and the air jet rod 54 gradually decreases. The airflow sprayed by the air jet units 55 located on both sides of the upper die 11 and the lower die 21 can respectively form vortex airflows around the cutter head of the upper die 11 and the cutter head of the lower die 21.

[0025] In the cooling structure 5, the air chamber 51 delivers airflow to the jet rod 54 through two sets of air pipes 52. The angle between the nozzles 56 on the outer wall of the jet unit 55 and the jet rod 54 gradually decreases, so that the jet units 55 on both sides of the upper die 11 and the lower die 21 respectively form vortex airflow around the cutter head of the upper die 11 and the cutter head of the lower die 21. This surrounding airflow can fully cover the surface of the cutter head, greatly improve the heat dissipation uniformity, effectively alleviate the problem of cutter head overheating caused by continuous high-speed stamping, reduce dynamic gap thermal drift, and reduce the risk of product burr fluctuation. At the same time, the vortex airflow can also help to gather debris and throw it out under the action of centrifugal force. The direct airflow at the end of the jet unit 55 can prevent debris from being thrown towards the feed table 3 and the discharge table 4.

[0026] like Figure 7 and Figure 8 As shown, a following assembly 57 is installed on the top of the air chamber 51. The following assembly 57 includes a mounting plate 571 installed at the bottom of the top plate 1. A slide rod is fixedly connected to the bottom of the mounting plate 571. A piston plate 511 is slidably connected inside the air chamber 51. The top of the piston plate 511 is fixedly connected to the bottom of the slide rod. A gear is fixedly connected to the bottom of the mounting plate 571. A gearbox 572 is installed on one side of the air chamber 51. A transmission gear 574 is provided at the input end of the gearbox 572. The outer wall of the transmission gear 574 meshes with a rack 573. The output end of the gearbox 572 is fixedly connected to one end of the jet rod 54 located above. A feed platform 3 and a discharge platform 4 are fixedly connected to both ends of the base 2, respectively.

[0027] The mounting plate 571 of the following component 57 moves synchronously with the top plate 1. The piston plate 511 in the air chamber 51 is driven to slide through the slide rod. At the same time, the gear and rack 573 mesh and drive the jet rod 54 above through the gearbox 572. This ensures that when the upper mold 11 moves up and down, the nozzle 56 of the upper jet unit 55 is always accurately aligned with the cutter head of the upper mold 11, avoiding heat dissipation dead angles caused by airflow deviation. Combined with the stable feeding of the feeding table 3 and the discharging table 4, it ensures the stability of heat dissipation during continuous processing. At the same time, the effect of the vortex airflow gathering and throwing out debris works in conjunction with the anti-slinging effect of the direct airflow to further improve the cleanliness of the processing environment.

[0028] like Figure 6 As shown, a limiting frame 512 is fixedly connected to the side of the air chamber 51 away from the lower mold 21, and a pressure-stabilizing airbag 513 communicating with the top of the air chamber 51 is provided inside the limiting frame 512.

[0029] A pressure-stabilizing airbag 513 is installed inside the limiting frame 512 on one side of the air chamber 51. The pressure-stabilizing airbag 513 is connected to the top of the air chamber 51 and can buffer the air pressure fluctuations in the air chamber 51 through elastic expansion and contraction, so that the air pressure output to the jet rod 54 remains stable. This avoids changes in the intensity of the vortex airflow due to air pressure fluctuations, ensuring both the consistency of the heat dissipation effect and the stability of the force of the vortex airflow gathering and throwing debris. At the same time, it maintains the effect of direct airflow in preventing debris from being thrown, and prevents the airflow from being too strong or too weak from affecting the overall debris handling efficiency.

[0030] like Figure 9 and Figure 10 As shown, a sealing assembly 58 is provided inside the jet rod 54. The sealing assembly 58 includes several elastic telescopic rods 581 installed inside the jet rod 54. A rubber sealing block 582 is fixedly connected to the output end of the elastic telescopic rod 581. The outer wall of the rubber sealing block 582 is inserted into the air outlet of the jet rod 54.

[0031] The sealing component 58 inside the air jet rod 54 pushes the rubber sealing block 582 to insert into the air outlet of the air jet rod 54 through the elastic telescopic rod 581. This can seal the air jet rod 54 when the mold is not in operation, preventing impurities from entering and clogging the air passage. At the same time, the elastic force of the elastic telescopic rod 581 can ensure the sealing reliability of the rubber sealing block 582, extend the service life of the air jet rod 54 and the nozzle 56, and reduce the frequency of maintenance. Furthermore, the sealing component 58 cooperates with the vent block 583 to allow for position adjustment of the air jet unit 55 between the air jet rod 54 and the air jet unit 55, or to install multiple sets of air jet units 55 at the same time, which can be flexibly adjusted according to the number and position of the cutter head.

[0032] like Figure 10As shown, a ventilation block 583 is fixedly connected inside the jet unit 55. One end of the ventilation block 583 abuts against one end of the rubber sealing block 582. The outer wall of the ventilation block 583 has a ventilation channel that connects the inside of the jet rod 54 and the inside of the jet unit 55.

[0033] The vent block 583 inside the jet unit 55 abuts against the rubber sealing block 582, and the venting channel on its outer wall connects the inside of the jet rod 54 with the inside of the jet unit 55. This structure allows the airflow to be evenly distributed inside the jet unit 55 and then ejected from each nozzle 56, avoiding excessively strong or weak airflow from a single nozzle 56, and further improving the uniformity of the vortex airflow. At the same time, the vent block 583 can limit the rubber sealing block 582, preventing excessive sealing from affecting airflow. Together with the function of the sealing component 58, it makes the position adjustment of the jet unit 55 or the installation of multiple units more convenient, adapting to the heat dissipation and chip handling needs of different cutter head layouts.

[0034] like Figure 2 and Figure 3 As shown, the surface of the upper mold 11 is provided with an auxiliary component 59. The auxiliary component 59 includes a slag discharge channel 591 opened on the surface of the lower mold 21. A wedge plate 592 is fixedly connected to the top of the slag discharge channel 591. The wedge plate 592 is located between the air chamber 51 and the opposite surface of the lower mold 21.

[0035] The slag discharge channel 591 of the auxiliary component 59 is opened on the surface of the lower mold 21. The wedge plate 592 at the top is located between the air chamber 51 and the lower mold 21. The wedge plate 592 can guide the debris thrown out by the vortex airflow to smoothly enter the slag discharge channel 591, avoid the accumulation of debris on the mold surface, reduce the secondary friction between debris and the cutting head, reduce the wear speed of the cutting edge, and ensure the cleanliness of the processing environment. At the same time, when the jet unit 55 jets, the jet box 594 simultaneously draws in air, forming a negative pressure near the slag discharge channel 591, which helps to attract debris to fall into the slag discharge channel 591 and improve the smoothness of chip removal.

[0036] like Figure 4 As shown, the auxiliary component 59 also includes an air jet box 594 fixedly connected inside the slag discharge channel 591. A circular pipe communicating with the air chamber 51 is fixedly connected to the bottom of the air chamber 51, and the bottom end of the circular pipe is connected to the inside of the air jet box 594.

[0037] The jet box 594 inside the slag discharge channel 591 is connected to the air chamber 51 through a round pipe. When the jet unit 55 jets, the negative pressure formed by the jet box 594 drawing in air can actively attract the debris thrown out by the vortex airflow. Combined with the guiding effect of the wedge plate 592, it greatly improves the efficiency of debris entering the slag discharge channel 591 and avoids debris from being stuck and blocked in the slag discharge channel 591. At the same time, when the jet box 594 receives the airflow delivered by the air chamber 51 and forms a pulse jet, it can drive the debris in the channel to be transported downward, further enhancing the slag discharge effect.

[0038] like Figure 4 As shown, the air outlet of the jet box 594 is equipped with a filter 595.

[0039] The filter 595 at the outlet port of the jet box 594 can filter out fine debris in the airflow, preventing debris from flowing back into the air chamber 51 or the jet rod 54 and causing airway blockage, thus ensuring the normal operation of the cooling structure 5. In addition, the filter 595 can effectively prevent debris from falling into the jet box 594, preventing the jet box 594 from being blocked and maintaining the stability of its intake and pulse jet functions.

[0040] like Figure 6 As shown, a solenoid valve 593 is installed on the outside of the circular tube. The solenoid valve 593 remains unobstructed when the jet box 594 draws in air, and opens intermittently when the jet box 594 discharges air, forming a pulsed jet airflow.

[0041] The solenoid valve 593 outside the circular tube remains unobstructed when the jet box 594 draws in air, ensuring a stable negative pressure to attract debris. When the air is discharged, it opens intermittently to form a pulse jet airflow. The pulse jet airflow can wash the surface of the filter screen 595 to prevent the filter screen 595 from being blocked by debris and maintain the airflow efficiency. At the same time, the impact force of the pulse jet airflow can drive the retained debris in the slag discharge channel 591 to continue to be transported downward, further improving the slag discharge effect. Together with the negative pressure suction, it achieves efficient debris discharge.

[0042] like Figure 2 As shown, it also includes a system control module 6, which is communicatively connected to the control system of the silicon steel sheet processing equipment and is used to automatically adjust the opening and closing of the solenoid valve 593 according to the operating status of the upper mold 11. The system control module 6 includes a pressure monitoring unit 61, an operation linkage unit 62, and a pulse control unit 63. The pressure monitoring unit 61 is integrated inside the air chamber 51 and is used to collect the pressure data inside the air chamber 51 in real time. The operation linkage unit 62 receives the upper mold 11 operation signal sent by the silicon steel sheet processing equipment control system. The operation signal includes the lower processing signal and the upper return signal of the upper mold 11. The pulse control unit 63 is electrically connected to the air pressure monitoring unit 61, the operation linkage unit 62 and the solenoid valve 593 respectively. When the air pressure monitoring unit 61 detects that the air pressure in the air chamber 51 reaches the preset threshold and the operation linkage unit 62 receives the downward processing signal of the upper mold 11, the pulse control unit 63 triggers the solenoid valve 593 to open for a predetermined time and then automatically close, so that the jet box 594 generates a circulating pulse airflow. The preset threshold and the opening time of solenoid valve 593 can be configured through the control system of the silicon steel sheet processing equipment to achieve adjustable and controllable pulse airflow intensity.

[0043] The system control module 6 is connected to the processing equipment control system. The air pressure monitoring unit 61 collects the air pressure data in the air chamber 51 in real time. The operation linkage unit 62 receives the running signal of the upper mold 11. The pulse control unit 63 adjusts the opening and closing of the solenoid valve 593 according to the air pressure threshold and the running status of the upper mold 11 to achieve precise coordination between the pulse airflow and the suction action of the jet box 594. This ensures the synergistic effect of negative pressure attracting debris and pulse flushing slag removal without manual intervention. It not only ensures precise matching with the processing rhythm, but also adapts to different cutter head layouts and processing scenarios through the configurable parameter feature, thereby improving the intelligence and versatility of the equipment.

[0044] The working principle of this invention is as follows: When in use, the silicon steel sheet enters the mold from the feeding table 3. The control system of the processing equipment drives the top plate 1 to move the upper mold 11 downward for stamping. At this time, the system control module 6 is synchronously linked with the control system of the processing equipment. The air pressure monitoring unit 61 collects the air pressure data in the air chamber 51 in real time. The operation linkage unit 62 receives the downward processing signal of the upper mold 11. When the air pressure in the air chamber 51 reaches the preset threshold, the pulse control unit 63 triggers the solenoid valve 593 to open for a predetermined time and then automatically closes, so that the jet box 594 generates pulse airflow. At this time, the jet unit 55 is in the air intake state. The sealing component 58 inside the jet rod 54 pushes the rubber sealing block 582 to engage with the air outlet of the jet rod 54 via the elastic telescopic rod 581, preventing impurities from entering the air passage. After stamping, the upper die 11 moves upward, and the operation linkage unit 62 receives the upward return signal of the upper die 11. The jet unit 55 switches to the jetting state, and the air chamber 51 delivers airflow to the jet rod 54 through two sets of air pipes 52. The angle between the nozzles 56 on the outer wall of the jet unit 55 and the jet rod 54 gradually decreases, so that the jet units 55 on both sides of the upper die 11 and both sides of the lower die 21 form airflow around the cutter head of the upper die 11 and the lower die 21, respectively. The vortex airflow of the die 21 cutter head can fully cover the surface of the cutter head, greatly improving the heat dissipation uniformity, effectively alleviating the problem of overheating of the cutter head caused by continuous high-speed stamping, reducing dynamic gap thermal drift, and reducing the risk of product burr fluctuation. At the same time, the vortex airflow can also help to gather debris and throw it out under the action of centrifugal force. The direct airflow at the end of the jet unit 55 can prevent debris from being thrown towards the feed table 3 and the discharge table 4. The pressure stabilizing airbag 513 in the limiting frame 512 on one side of the air chamber 51 buffers the air pressure fluctuation in the air chamber 51 through elastic expansion and contraction, ensuring stable airflow pressure. The mounting plate 571 of the following component 57 moves synchronously with the top plate 1. The piston plate 511 in the air chamber 51 slides through the slide rod. At the same time, the gear and rack 573 mesh and drive the jet rod 54 above through the gear gearbox 572. This ensures that the nozzle 56 of the jet unit 55 above is always accurately aligned with the cutter head of the upper mold 11 when the upper mold 11 moves up and down, avoiding heat dissipation dead angles caused by airflow deviation. The air block 583 inside the jet unit 55 connects the jet rod 54 and the jet unit 55 through the air passage, so that the airflow is evenly distributed and then ejected from each nozzle 56, further improving the uniformity of the vortex airflow. The sealing component 58 cooperates with the air block 583, so that the position between the jet rod 54 and the jet unit 55 can be adjusted or multiple jet units 55 can be installed, which can be flexibly adjusted according to the number and position of the cutter head. When the jet unit 55 is in jet mode, the jet box 594 switches to suction mode. The solenoid valve 593 outside the circular tube controls the jet box 594 to suction when the upper mold 11 moves upward, creating a negative pressure near the slag discharge channel 591. The wedge-shaped plate 592 at the top of the slag discharge channel 591 of the auxiliary component 59 guides the debris thrown out by the vortex airflow smoothly into the slag discharge channel 591. The negative pressure further attracts the debris to fall into the channel. The jet box 594 inside the slag discharge channel 591 is connected to the air chamber 51 through the circular tube. In suction mode, it can actively adsorb debris. The filter 595 at the 4 air outlet ports can filter out fine debris in the airflow, preventing debris from flowing back and clogging the air passage or falling into the air jet box 594, thus maintaining the normal operation of the equipment. The solenoid valve 593 outside the round tube controls the air jet box 594 to spray intermittently when the upper die 11 moves downward, thereby forming a pulse airflow that impacts the filter 595, thereby achieving the effect of cleaning the filter 595. After the stamping is completed, the silicon steel sheet is output from the discharge table 4. The whole process realizes the coordinated and efficient operation of processing, heat dissipation, debris collection and slag discharge, significantly improving the processing quality and equipment service life.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision progressive die for machining silicon steel sheets, comprising a top plate (1) and a base (2), characterized in that: The top plate (1) is fixedly installed with an upper mold (11) at the bottom, and the base (2) is fixedly installed with a lower mold (21) at the top. The upper mold (11) is equipped with a cooling structure (5) at the top. The cooling structure (5) includes an air chamber (51) fixedly installed at the top of the upper mold (11). Two sets of air pipes (52) are fixedly connected to one side of the air chamber (51). One end of each set of air pipes (52) is fixedly connected with a jet rod (54). A jet unit (55) is provided on the outside of each of the two jet rods (54). Several nozzles (56) are provided on the outer wall of the jet unit (55). The included angle between the several nozzles (56) and the jet rod (54) gradually decreases. The airflow sprayed by the jet units (55) located on both sides of the upper mold (11) and the lower mold (21) can respectively form vortex airflow around the cutter head of the upper mold (11) and the cutter head of the lower mold (21).

2. The high-precision progressive die for machining silicon steel sheets according to claim 1, characterized in that: A following assembly (57) is installed on the top of the air chamber (51). The following assembly (57) includes a mounting plate (571) installed at the bottom of the top plate (1). A slide rod is fixedly connected to the bottom of the mounting plate (571). A piston plate (511) is slidably connected inside the air chamber (51). The top of the piston plate (511) is fixedly connected to the bottom of the slide rod. A gear is fixedly connected to the bottom of the mounting plate (571). A gearbox (572) is installed on one side of the air chamber (51). A transmission gear (574) is provided at the input end of the gearbox (572). The outer wall of the transmission gear (574) meshes with a rack (573). The output end of the gearbox (572) is fixedly connected to one end of the jet rod (54) located above. A feeding platform (3) and a discharging platform (4) are fixedly connected to both ends of the base (2).

3. The high-precision progressive die for machining silicon steel sheets according to claim 1, characterized in that: A limiting frame (512) is fixedly connected to the side of the air chamber (51) away from the lower mold (21), and a pressure-stabilizing airbag (513) communicating with the top of the air chamber (51) is provided inside the limiting frame (512).

4. The high-precision progressive die for machining silicon steel sheets according to claim 1, characterized in that: The inside of the jet rod (54) is provided with a sealing assembly (58), which includes several elastic telescopic rods (581) installed inside the jet rod (54). The output end of the elastic telescopic rod (581) is fixedly connected to a rubber sealing block (582), and the outer wall of the rubber sealing block (582) is inserted into the air outlet of the jet rod (54).

5. A high-precision progressive die for machining silicon steel sheets according to claim 4, characterized in that: An air vent (583) is fixedly connected inside the jet unit (55). One end of the air vent (583) abuts against one end of the rubber sealing block (582). An air passage is provided on the outer wall of the air vent (583) to connect the inside of the jet rod (54) and the inside of the jet unit (55).

6. The high-precision progressive die for machining silicon steel sheets according to claim 1, characterized in that: The surface of the upper mold (11) is provided with an auxiliary component (59), the auxiliary component (59) including a slag discharge channel (591) opened on the surface of the lower mold (21), the top of the slag discharge channel (591) is fixedly connected with a wedge plate (592), the wedge plate (592) is located between the gas chamber (51) and the opposite surface of the lower mold (21).

7. A high-precision progressive die for machining silicon steel sheets according to claim 6, characterized in that: The auxiliary component (59) also includes an air jet box (594) fixedly connected inside the slag discharge channel (591). A circular pipe communicating with the air chamber (51) is fixedly connected to the bottom of the air chamber (51), and the bottom end of the circular pipe is connected to the inside of the air jet box (594).

8. The high-precision progressive die for machining silicon steel sheets according to claim 7, characterized in that: The air outlet of the jet box (594) is provided with a filter (595).

9. A high-precision progressive die for machining silicon steel sheets according to claim 7, characterized in that: A solenoid valve (593) is installed on the outside of the circular tube. The solenoid valve (593) remains unobstructed when the jet box (594) draws in air, and opens intermittently when the jet box (594) discharges air, forming a pulse jet airflow.

10. A high-precision progressive die for machining silicon steel sheets according to claim 1, characterized in that: It also includes a system control module (6), which is connected in communication with the control system of the silicon steel sheet processing equipment and is used to automatically adjust the opening and closing of the solenoid valve (593) according to the operating status of the upper mold (11); The system control module (6) includes a pressure monitoring unit (61), an operation linkage unit (62), and a pulse control unit (63). The pressure monitoring unit (61) is integrated inside the air chamber (51) and is used to collect the pressure data inside the air chamber (51) in real time. The operation linkage unit (62) receives the upper mold (11) operation signal sent by the silicon steel sheet processing equipment control system. The operation signal includes the down-going processing signal and the up-going return signal of the upper mold (11). The pulse control unit (63) is electrically connected to the air pressure monitoring unit (61), the operation linkage unit (62) and the solenoid valve (593) respectively. When the air pressure monitoring unit (61) detects that the air pressure in the air chamber (51) reaches the preset threshold, and the operation linkage unit (62) receives the downward processing signal of the upper mold (11), the pulse control unit (63) triggers the solenoid valve (593) to open for a predetermined time and then automatically close, so that the jet box (594) generates a circulating pulse airflow. The preset threshold and the opening time of the solenoid valve (593) can be configured by the control system of the silicon steel sheet processing equipment to achieve adjustable and controllable pulse airflow intensity.

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