Iron core silicon steel sheet punching mechanism

Abstract

The utility model belongs to the field of silicon steel sheet production equipment, and particularly relates to an iron core silicon steel sheet punching mechanism which comprises a lower die and an upper die with a pressing core and a punch, the lower die is matched with the punch to form punching matching, the upper die is connected with a lifting table, the punching mechanism further comprises an ejection assembly, a through hole is formed in the punch in the axial direction of the punch, and the ejection assembly is connected with the pressing core. The ejection assembly comprises an ejection rod, a first sliding way arranged on the lower die, a second sliding way arranged at the upper end of the ejection rod and a lever hinged to the upper die, the two ends of the lever are in sliding connection with the first sliding way and the second sliding way respectively, and the lower end of the ejection rod is located in the through hole. The upper die enables the lever to rotate along the hinge shaft of the lever by means of lifting of the lifting table so as to drive the ejector rod to move in the through hole in the vertical direction, the mechanism can downwards push punched waste materials, the situation that the waste materials are accumulated in the blanking hole of the lower die to cause damage to the lower die is effectively prevented, and the production efficiency can be improved.

Description

Technical Field

[0001] The utility model belongs to the field of silicon steel sheet production equipment, and particularly relates to an iron core silicon steel sheet punching mechanism. Background Art

[0002] Transformer cores are typically constructed from stacked, cut-to-size silicon steel sheets. Holes are punched in these sheets to allow bolts to pass through and secure the core. The core requires a large number of sheets, so to improve transformer core production efficiency, the punching process must also maintain high efficiency. However, during high-frequency continuous punching, waste material removed by the punch easily accumulates in the blanking hole of the lower die. Continued punching damages the die, requiring downtime for repairs and impacting production efficiency while also driving up production costs. Utility Model Content

[0003] In order to solve the problems existing in the above-mentioned prior art, the utility model provides an iron core silicon steel sheet punching mechanism, which can push down the punched waste, effectively preventing the waste from accumulating in the blanking hole of the lower die and causing damage to the lower die, thereby helping to improve production efficiency.

[0004] The specific technical solution adopted in this utility model is:

[0005] A punching mechanism for an iron core silicon steel sheet comprises a lower die, an upper die with a pressing core and a punch, the lower die and the punch are matched to form a punching fit, and the upper die is connected to a lifting platform. The key point is that the punching mechanism also includes an ejection assembly, the punch is provided with a through hole along its axial direction, the ejection assembly includes a push rod, a first slide provided on the lower die, a second slide provided at the upper end of the push rod and a lever hinged to the upper die, the two ends of the lever are respectively slidably connected to the first slide and the second slide, the lower end of the push rod is located in the through hole, and the upper die rotates the lever along its hinge axis with the help of the lifting platform, thereby driving the push rod to move vertically in the through hole.

[0006] The upper die is provided with a guide rod, the upper end of the ejector rod is provided with a pressure plate with a guide hole, the guide hole and the guide rod are matched to form a guide fit for the ejector rod, and the second slide is provided on the pressure plate.

[0007] Lever are respectively provided at both ends of the pressing plate, and the first slideway is matched with the lever on the pressing core.

[0008] The first slideway and the second slideway are both arranged horizontally, the lever is in a V-shaped structure, and the bottom of the lever is hinged to the upper mold.

[0009] The upper mold is provided with a cavity, the lever and the pressure block are both located in the cavity, one end of the lever extends from the side wall of the upper mold to form a sliding connection with the first slide, and the side wall of the upper mold is provided with an avoidance hole matching the lever.

[0010] The beneficial effects of the utility model are:

[0011] The utility model adopts a lifting platform to drive the upper die to descend, the pressure core contacts the silicon steel sheet on the lower die and presses the silicon steel sheet onto the lower die, the upper die continues to descend, the position of the pressure core remains unchanged, the punch blade enters the lower die to punch holes in the silicon steel sheet, and during the punching process, the pressure core and the upper die produce vertical relative displacement, the lever rotates along its hinge axis, so that the push rod moves downward relative to the punch, and when the lower end of the punch is lower than the bottom surface of the silicon steel sheet and continues to move downward, the push rod extends downward from the punch to push the waste punched by the punch, ensuring that the waste can fall from the blanking hole of the lower die, and preventing the waste from accumulating in the blanking hole of the lower die and continuing to be punched, causing the lower die to be damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] Figure 2 This is a schematic diagram of the state when the pressure core of the utility model is in contact with the silicon steel sheet;

[0014] Figure 3 This is a schematic diagram of the state in which the punch of the utility model is completely inserted into the lower die;

[0015] Figure 4 This is a schematic diagram of the assembly of the punch and the ejector pin;

[0016] In the accompanying drawings, 1, lower die, 2, core pressing, 3, upper die, 4, punch, 5, lifting platform, 6, through hole, 7, ejector rod, 8, first slide, 9, second slide, 10, lever, 11, pressure plate, 12, guide rod, 13, cavity, 14, avoidance hole, 15, silicon steel sheet. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0018] Specific implementation examples Figure 1-4As shown, a punching mechanism for an iron core silicon steel sheet comprises a lower die 1, an upper die 3 with a pressure core 2 and a punch 4, the lower die 1 and the punch 4 are matched to form a punching fit, the upper die 3 is connected to the lifting platform 5, and comprises a lower die 1, an upper die 3, a punch 4, a pressure core 2 and an ejection mechanism, the upper die 3 is connected to the lifting platform 5, the pressure core 2 and the punch 4 are installed on the upper die 3, the lower die 1 and the punch 4 form a punching fit, a through hole 6 is provided on the punch 4 along its axial direction, the ejection assembly comprises a ejector rod 7, a first slide 8 provided on the lower die 1, a second slide 9 provided at the upper end of the ejector rod 7 and a lever 10 hinged to the upper die 3, the two ends of the lever 10 are respectively slidably connected to the first slide 8 and the second slide 9, the lower end of the ejector rod 7 is located in the through hole 6, the upper die 3 makes the lever 10 rotate along its hinge axis with the help of the lifting of the lifting platform 5, thereby driving the ejector rod 7 to move vertically in the through hole 6.

[0019] The pressing core 2 is provided with a connecting rod, the upper die 3 is provided with a guide hole matched with the connecting rod, and the connecting rod is sleeved with springs matched with the pressing core 2 and the upper die 3 respectively.

[0020] During operation, the silicon steel sheet is placed on the lower die 1, and the lifting platform 5 drives the upper die 3 to descend. The pressure core 2 contacts the silicon steel sheet and presses the silicon steel sheet against the lower die 1. The upper die 3 continues to descend, and the position of the pressure core 2 remains unchanged. The punch 4 cuts into the lower die 1 to punch and punch holes in the silicon steel sheet. During the punching process, the pressure core 2 and the upper die 3 produce a vertical relative displacement. The lever 10 rotates along its hinge axis, causing the push rod 7 to move downward relative to the punch 4. The lower end of the punch 4 is lower than the bottom surface of the silicon steel sheet. During the process of continuing to move downward, the push rod 7 is extended downward by the punch 4 to push the waste punched out by the punch 4, ensuring that the waste can fall from the blanking hole of the lower die 1, and preventing the waste from accumulating in the blanking hole of the lower die 1 and continuing to punch, which may cause damage to the lower die 1. When the punch 4 completely cuts into the lower die 1, the upper die 3 stops descending.

[0021] After one punching is completed, the lifting platform 5 drives the upper die 3 to rise. At this time, the pressure core 2 does not move, and the upper die 3 and the punch 4 rise upward. During the lifting process, the lever 10 rotates in the opposite direction along its axial direction, and the lower end of the push rod 7 enters the through hole 6. The upper die 3 continues to rise, and the pressure core 2 is reset together with the upper die 3.

[0022] Furthermore, a guide rod 12 is provided on the upper mold 3, and a pressure plate 11 with a guide hole is provided on the upper end of the push rod 7. The guide hole and the guide rod 12 are matched to form a guiding fit for the push rod 7. The second slide 9 is provided on the pressure plate 11, and the guide rod 12 is matched with the guide hole to guide the up and down movement of the push rod 7, thereby improving the accuracy of the moving trajectory of the push rod 7, avoiding interference between the push rod 7 and the punch 4 when the push rod 7 moves up and down relative to the punch 4, and ensuring that the push rod 7 can move smoothly in the through hole 6; on the other hand, the guidance of the movement of the push rod 7 does not require the help of the push rod 7 and the through hole 6 to be carried out, thereby avoiding the push rod 7 from being damaged by a large radial force, extending the service life of the push rod 7, and reducing the maintenance frequency.

[0023] Furthermore, levers 10 are respectively provided at both ends of the pressure plate 11, and the first slide 8 is matched with the lever 10 on the pressure core 2. The levers 10 at both ends simultaneously drive the pressure plate 11 and the push rod 7 to move, so that the pressure plate 11 is evenly stressed and the movement process is smoother.

[0024] Furthermore, the first slide 8 and the second slide 9 are both arranged horizontally, the lever 10 is in a V-shaped structure, and the bottom of the lever 10 is hinged to the upper mold 3, which is convenient for processing and manufacturing.

[0025] Furthermore, a cavity 13 is provided on the upper mold 3, and the lever 10 and the pressure block are both located in the cavity 13. One end of the lever 10 extends from the side wall of the upper mold 3 to form a sliding connection with the first slide 8, and an avoidance hole 14 matching the lever 10 is provided on the side wall of the upper mold 3.

[0026] The lever 10 is divided into a short arm and a long arm by means of a hinge shaft, wherein the short arm is slidably connected to the first slide 8, and the long arm is slidably connected to the second slide 9, so that the relative movement distance between the upper mold 3 and the pressing core 2 is fixed, and the movement distance of the push rod 7 relative to the punch 4 is extended, further ensuring that the push rod 7 can push the waste down to avoid the waste from accumulating on the lower mold 1.

Claims

1. A punching mechanism for an iron core silicon steel sheet, comprising a lower die (1), an upper die (3) with a pressing core (2) and a punch (4), wherein the lower die (1) and the punch (4) are matched to form a punching fit, and the upper die (3) is connected to a lifting platform (5), characterized in that: It also includes an ejection assembly, wherein the punch (4) is provided with a through hole (6) along its axial direction, and the ejection assembly includes a push rod (7), a first slide (8) provided on the pressure core (2), a second slide (9) provided at the upper end of the push rod (7), and a lever (10) hinged to the upper mold (3), the two ends of the lever (10) are respectively slidably connected to the first slide (8) and the second slide (9), the lower end of the push rod (7) is located in the through hole (6), and the upper mold (3) is lifted and lowered by the lifting platform (5) to rotate the lever (10) along its hinge axis, thereby driving the push rod (7) to move vertically in the through hole (6).

2. The iron core silicon steel sheet punching mechanism according to claim 1, characterized in that: The upper mold (3) is provided with a guide rod (12), and the upper end of the push rod (7) is provided with a pressure plate (11) with a guide hole. The guide hole and the guide rod (12) are matched to form a guide fit for the push rod (7), and the second slideway (9) is provided on the pressure plate (11).

3. The iron core silicon steel sheet punching mechanism according to claim 2, characterized in that: Lever (10) is respectively provided at both ends of the pressing plate (11), and the first slideway (8) is matched with the lever (10) on the pressing core (2).

4. The iron core silicon steel sheet punching mechanism according to claim 1, characterized in that: The first slideway (8) and the second slideway (9) are both arranged horizontally, the lever (10) is in a V-shaped structure, and the bottom of the lever (10) is hinged to the upper mold (3).

5. The iron core silicon steel sheet punching mechanism according to claim 1, characterized in that: A cavity (13) is provided on the upper mold (3), and the lever (10) and the pressure block are both located in the cavity (13). One end of the lever (10) extends from the side wall of the upper mold (3) to form a sliding connection with the first slideway (8), and an avoidance hole (14) matching the lever (10) is provided on the side wall of the upper mold (3).

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