A punching processing equipment

Abstract

This invention discloses a punching processing device, relating to the field of punching processing equipment. The device includes a punching machine base and a fixed frame mounted on top of the punching machine base. A punching head is mounted on the fixed frame, and a first fixed seat is mounted at the bottom of the fixed frame. A feeding frame is mounted on one side of the punching machine base, and a second fixed seat is mounted on the feeding frame. A steel plate is placed between the two sets of fixed seats. This punching processing device, by providing a guide seat and a conveying screw at the feeding frame, and connecting the second fixed seat at the feeding frame to the conveying screw, allows the second fixed seat and one end of the steel plate fixed at the second fixed seat to move along the outer surface of the conveying screw towards the punching head under the drive of a first motor. This enables continuous conveying of the steel plate, eliminating the inconvenience of manual movement required in traditional methods and reducing the inconvenience of repeatedly adjusting and repositioning the steel plate, thereby improving overall punching efficiency.

Description

Technical Field

[0001] This invention relates to the field of punching equipment technology, specifically to a punching equipment. Background Technology

[0002] Steel plates are used in the construction process. During the assembly of steel plates, holes need to be drilled so that other materials can be connected to the steel plates through the holes. Currently, the main method is to punch holes in the steel plates using a punching machine.

[0003] The steel plate is stably limited at the punching machine by the fixed seat set at the feeding frame on one side of the punching machine. However, the positions of the two sets of fixed seats are fixed and cannot be changed. When drilling holes in different parts of the steel plate, manual assistance is required to move the steel plate, which makes the manual burden heavy. Moreover, multiple manual movements require multiple calibrations and positioning of the steel plate. The overall operation is cumbersome and cannot conveniently punch the steel plate continuously.

[0004] In addition, during the punching process of steel plates, the steel plates are placed directly on the punching machine where the punching head is located. Although the impact force of the punching head is relatively large, the steel plate itself also has a certain strength. When the punching head directly impacts the steel plate, although the punching operation is completed, the area around the hole will also deform under the impact of external force, resulting in incomplete hole edges. In view of the above situation, we propose a punching processing equipment. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention discloses a punching processing equipment to solve the problems mentioned in the background art, such as the inability to continuously and conveniently transport steel plates during the punching process, and the incomplete edges of the holes in the steel plates caused by direct punching.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: a punching processing device, comprising: a punching machine base and a fixed frame disposed on the top of the punching machine base, a hydraulic press disposed on the top of the fixed frame, a punching head disposed on the lower surface of the hydraulic press, a first fixed seat disposed at the bottom of the fixed frame, a feeding frame disposed on one side of the punching machine base, a second fixed seat disposed at the feeding frame, and a steel plate placed between the first fixed seat and the second fixed seat, and a feeding mechanism for convenient feeding of the steel plate disposed at the feeding frame, the feeding mechanism comprising a guide seat, a conveying screw and a first motor, the guide seat disposed on the upper surface of the feeding frame, and the conveying screw disposed inside the guide seat, the two ends of the second fixed seat being threaded onto the outer surface of the conveying screw, and a first motor disposed at one end of the conveying screw for driving the conveying screw to rotate, the first motor being disposed on one side of the feeding frame.

[0009] Preferably, threaded blocks are provided on both sides of the second fixed seat. The threaded blocks slide within the guide seat and are threaded onto the outer surface of the transmission screw.

[0010] Preferably, each of the two sets of conveying screws is provided with a first shaft at one end, and one end of the first shaft extends to the outside of the guide seat. The side of the feeding rack away from the punching machine base is provided with a second shaft, and one end of the second shaft is connected to the first motor. A set of conveyor belts is provided between the two sets of first shafts and second shafts respectively. A cover for shielding the two sets of conveyor belts is provided on one side of the feeding rack.

[0011] Preferably, a set of pre-punching mechanisms is provided at the upper and lower parts of the end of the feeding rack near the base of the punching machine, which facilitates the effective punching of the steel plate by the punching head in the later stage. The pre-punching mechanism includes a connecting frame, an electric telescopic column and a cutting knife. A set of connecting frames is provided on the upper and lower surfaces of two adjacent sets of guide seats, and a set of electric telescopic columns is provided on the inner top and inner bottom of the two sets of connecting frames. A cutting knife is provided at one end of the electric telescopic column, and the bottom ends of the two sets of cutting knives are in contact with the upper and lower surfaces of the steel plate, respectively.

[0012] Preferably, the top of the connecting frame is provided with a controller for controlling the extension and retraction of the electric telescopic column, and the inner surface of the connecting frame is provided with a control mechanism for controlling the engraving knife to rotate in a ring, and the path of the engraving knife to rotate in a ring is equal to the circumference of the punch head.

[0013] Preferably, the control mechanism includes a connecting seat, a connecting shaft, a gear, a gear ring, a bearing, and a second motor. The connecting seat is disposed on the inner surface of the connecting frame, and a connecting shaft is disposed at the connecting seat. A gear is disposed on the outer surface of the connecting shaft. The top end of the connecting shaft is connected to the second motor installed at the connecting seat. The bearing is disposed at the bottom end of the electric telescopic column, and a gear ring that meshes with the gear is disposed on the outer surface of the bearing.

[0014] Preferably, the bearing is connected to the carving knife on the side away from the electric telescopic column. A replacement assembly for replacing the carving knife is provided at the bearing. The replacement assembly includes a connector and a fixing screw. The connector is located on the side of the bearing away from the electric telescopic column. One end of the carving knife is inserted into the inside of the connector. A fixing screw is provided on one side of the connector for connecting and fixing the carving knife to the connector.

[0015] Preferably, the inner surface of the connecting frame is provided with a sliding groove, and the outer surface of the electric telescopic column near the bearing is provided with a limiting plate, one end of the limiting plate being limited to slide inside the sliding groove.

[0016] Preferably, a positioning screw is rotatably provided on the upper surface of the second fixing seat, and the bottom end of the positioning screw abuts against the upper surface of the steel plate for positioning and fixing the steel plate.

[0017] Preferably, a receiving rack is provided on the side of the punching machine base away from the feeding rack for receiving the punched steel plate.

[0018] This invention discloses a punching processing equipment, which has the following beneficial effects:

[0019] 1. This punching processing equipment, by setting a guide seat and a conveying screw at the feeding rack, connects the second fixed seat set at the feeding rack to the conveying screw, so that under the drive of the first motor, the second fixed seat and one end of the steel plate fixed at the second fixed seat move along the outer surface of the conveying screw towards the punching head, so as to continuously convey the steel plate, thereby changing the inconvenience of manual movement required in the traditional method, and also reducing the inconvenience of positioning the steel plate after multiple adjustments, thus improving the overall punching efficiency.

[0020] 2. This punching processing equipment uses a set of engraving blades installed at the upper and lower ends of two sets of guide seats. The two sets of engraving blades are connected to the upper and lower surfaces of the steel plate, respectively. A control mechanism installed thereon drives the engraving blades to rotate in a circle, so that the engraving blades cut the surface of the steel plate. The cutting path is equal to the circumference of the hole to be punched in the steel plate. This causes the steel plate to be initially cut at the punching position. When the steel plate moves from the pre-cut position to the punching head, the connection strength between the steel plate body at the pre-cut position and the part to be discarded is reduced, which reduces the punching resistance of the punching head. This makes the punching process of the punching head convenient and smooth, and reduces deformation at the edge of the hole.

[0021] 3. This punching processing equipment features an electric telescopic column that can drive the cutting tool to move up and down, ensuring precise alignment between the cutting tool and the required punching position on the steel plate. This prevents misprocessing of areas on the steel plate where punching is not necessary. The cutting tool is connected to a connector located at the bottom bearing of the electric telescopic column. The connector is equipped with a fixing screw for securing the cutting tool to the connector, facilitating installation and fixation. Additionally, the cutting tool can be disassembled and replaced if it becomes damaged later. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the feeding rack and guide seat structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the guide seat and transmission screw structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the internal structure of the casing of the present invention;

[0026] Figure 5 This is a schematic diagram of the transmission screw, first shaft, and connecting belt structure of the present invention;

[0027] Figure 6 This is an exploded view of the guide seat, transmission screw, and second fixed seat structure of the present invention;

[0028] Figure 7 This is a schematic diagram of the guide seat and engraving tool structure of the present invention;

[0029] Figure 8 This is a schematic diagram of the engraving knife, electric telescopic column, and drive mechanism of the present invention;

[0030] Figure 9 This is an exploded view of the driving mechanism and the engraving tool structure of the present invention;

[0031] Figure 10 This is an exploded view of the electric telescopic column and bearing structure of the present invention.

[0032] In the diagram: 1. Punching machine base; 101. Fixing frame; 102. Hydraulic press; 103. Punching head; 104. First fixing seat; 2. Feeding rack; 201. Receiving rack; 202. Second fixing seat; 203. Positioning screw; 301. Guide seat; 302. Conveying screw; 303. Threaded block; 304. First shaft; 305. Second shaft; 306. Conveyor belt; 307. First motor; 308. Cover; 401. Connecting frame; 402. Electric telescopic column; 403. Controller; 404. Cutter; 501. Connecting seat; 502. Connecting shaft; 503. Gear; 504. Gear ring; 505. Bearing; 506. Second motor; 6. Slide groove; 601. Limiting plate; 7. Connecting head; 701. Fixing screw; 8. Steel plate. Detailed Implementation

[0033] This invention discloses a punching processing equipment, such as... Figure 1-10 As shown, in order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings and through embodiments.

[0034] Example 1

[0035] like Figure 1-10 The diagram illustrates a punching processing device, comprising a punching machine base 1 and a fixing frame 101 mounted on top of the punching machine base 1. A hydraulic press 102 is mounted on top of the fixing frame 101, and a punching head 103 is mounted on the lower surface of the hydraulic press 102. A first fixing seat 104 is mounted at the bottom of the fixing frame 101, with the punching head 103 located directly above the first fixing seat 104. A feeding rack 2 is mounted on one side of the punching machine base 1, and a second fixing seat 202 is mounted on the feeding rack 2. In the initial state, the second fixing seat 202 is located at the upper part of the end of the feeding rack 2 furthest from the punching machine base 1, at which point the distance between the two sets of fixing seats is at its maximum, and the first fixing seat 104 and the second fixing seat 202 are positioned close together. A steel plate 8 is placed therein, which is the part to be punched, and the steel plate 8 is a hollow steel plate structure. A positioning screw 203 is rotatably set on the upper surface of the second fixed seat 202. The bottom end of the positioning screw 203 abuts against the upper surface of the steel plate 8 for positioning and fixing the steel plate 8. A receiving rack 201 is set on the side of the punching machine base 1 away from the feeding rack 2 for receiving the steel plate 8 after punching. The two ends of the steel plate 8 are respectively inserted into the first fixed seat 104 and the second fixed seat 202. Since the positioning screw 203 is set at the second fixed seat 202, the steel plate 8 and the second fixed seat 202 are in a connected and fixed state, thereby limiting the steel plate 8 at the fixed frame 101 and the feeding rack 2.

[0036] A feeding mechanism for convenient feeding of steel plate 8 is provided at feeding rack 2. The feeding mechanism includes guide seat 301, conveying screw 302 and first motor 307. Guide seat 301 is set on the upper surface of feeding rack 2, and conveying screw 302 is set inside guide seat 301. A set of guide seats 301 is set on both sides of a set of second fixed seats 202. The two sets of guide seats 301 and the connecting devices thereon form a feeding mechanism. The two ends of the second fixed seats 202 are threaded onto the outer surface of the conveying screw 302. The first motor 307 is set at one end of the conveying screw 302 to drive the conveying screw 302 to rotate. 307 is set on one side of the feeding rack 2. Threaded blocks 303 are provided on both sides of the second fixed seat 202. The threaded blocks 303 slide within the guide seat 301 and are threaded onto the outer surface of the conveying screw 302. When the first motor 307 is started, the conveying screw 302 can be rotated. At this time, under the action of the threaded connection, the threaded blocks 303 move along the outer surface of the conveying screw 302, thereby causing the second fixed seat 202 connected to the threaded blocks 303 to move in the same way. Consequently, the steel plate 8 connected and fixed to the second fixed seat 202 moves in the same direction and distance.

[0037] Each of the two sets of conveying screws 302 has a first shaft 304 at one end, and one end of the first shaft 304 extends to the outside of the guide seat 301. The side of the feeding rack 2 away from the punching machine base 1 has a second shaft 305, and one end of the second shaft 305 is connected to the first motor 307. A set of conveyor belts 306 is respectively arranged between the two sets of first shafts 304 and second shafts 305. A cover 308 for shielding the two sets of conveyor belts 306 is arranged on one side of the feeding rack 2. A set of conveyor belts 306 is arranged at each of the two sets of first shafts 304. The ends of the two sets of conveyor belts 306 away from the first shafts 304 are respectively located at the second shafts 305. When the first motor 307 drives the second shaft 305 to rotate, under the action of the conveyor belts 306, the first shaft 304 and the conveying screws 302 connected to the first shaft 304 can be driven to rotate, thereby achieving the purpose of simultaneously driving the two sets of conveying screws 302 to rotate.

[0038] A set of pre-punching mechanisms is provided at the upper and lower parts of the end of the feeding rack 2 near the punching machine base 1 to facilitate the effective punching of the steel plate 8 by the punching head 103. The pre-punching mechanism includes a connecting frame 401, an electric telescopic column 402, and a cutting blade 404. A set of connecting frames 401 is provided on the upper and lower surfaces of two adjacent sets of guide seats 301. A set of electric telescopic columns 402 is provided on the inner top and inner bottom of the two sets of connecting frames 401, and a cutting blade 404 is provided at one end of the electric telescopic column 402. The electric telescopic column 402 can drive the cutting blade 404 to move up and down, so that the cutting blade 404 and the steel plate 8 can make the required contact. The punching positions are precisely aligned to avoid misprocessing of areas on the steel plate 8 where punching is not required. The bottom ends of the two sets of engraving blades 404 are in contact with the upper and lower surfaces of the steel plate 8, respectively. The top of the connecting frame 401 is equipped with a controller 403 for controlling the extension and retraction of the electric telescopic column 402. The center point of the second fixed seat 202, the center point of the connecting frame 401, and the center point of the bearing 505 coincide. When the second fixed seat 202 and the positioning screw 203 thereon move to the connecting frame 401, the engraving blades 404 can be moved upward by the electric telescopic column 402, thus avoiding obstruction of the movement trajectory of the second fixed seat 202.

[0039] The inner surface of the connecting frame 401 is provided with a control mechanism for controlling the circular rotation of the engraving knife 404. The path of the circular rotation of the engraving knife 404 is equal to the circumference of the punching head 103. When the engraving knife 404 rotates in a circular motion on the surface of the steel plate 8, the required punching position of the steel plate 8 is initially cut. Then, when the steel plate 8 moves from the pre-cut position to the punching head 103, the connection strength between the steel plate 8 body at the pre-cut position and the required waste part is reduced, which reduces the punching resistance of the punching head 103. This makes the punching process of the punching head 103 convenient and smooth, and improves the punching effect of the steel plate 8. The control mechanism includes a connecting seat 501, a connecting shaft 502, a gear 503, a gear ring 504, a bearing 505, and a second motor. 506. A connecting seat 501 is disposed on the inner surface of a connecting frame 401, and a connecting shaft 502 is disposed at the connecting seat 501. A gear 503 is disposed on the outer surface of the connecting shaft 502. The top end of the connecting shaft 502 is connected to a second motor 506 installed at the connecting seat 501. A bearing 505 is disposed at the bottom end of an electric telescopic column 402, and a toothed ring 504 that meshes with the gear 503 is disposed on the outer surface of the bearing 505. The side of the bearing 505 away from the electric telescopic column 402 is connected to a carving knife 404. The electric telescopic column 402 consists of two sets of columns with different diameters. The bearing 505 is connected to the set of columns with the smaller diameter. By controlling the rotation of the toothed ring 504, the carving knife 404 connected to the toothed ring 504 rotates in a ring.

[0040] The inner surface of the connecting frame 401 is provided with a sliding groove 6. The outer surface of the electric telescopic column 402 near the bearing 505 is provided with a limiting plate 601. One end of the limiting plate 601 is limited to slide inside the sliding groove 6. Through the sliding groove 6 and the limiting plate 601, the path of the carving knife 404 moving up and down is limited.

[0041] A replacement assembly for replacing the engraving knife 404 is provided at the bearing 505. The damaged engraving knife 404 can be disassembled and a new, intact engraving knife 404 can be installed at the connector 7 of the bearing 505. The replacement assembly includes the connector 7 and the fixing screw 701. The connector 7 is located on the side of the bearing 505 away from the electric telescopic column 402. One end of the engraving knife 404 is inserted into the inside of the connector 7. A fixing screw 701 is provided on one side of the connector 7 for connecting and fixing the engraving knife 404 and the connector 7.

[0042] In summary,

[0043] Before using the device, first insert one end of the engraving knife 404 into the inside of the connector 7 provided on one side of the bearing 505, and then rotate the fixing screw 701 provided at the connector 7 to stably install the intact engraving knife 404 at the connector 7 of the bearing 505.

[0044] Furthermore, one end of the steel plate 8 to be punched is passed through the second fixed seat 202 and pushed towards the punching machine base 1, so that one end of the steel plate 8 is inserted into the inside of the first fixed seat 104. Then, the positioning screw 203 provided at the second fixed seat 202 can be rotated so that one end of the positioning screw 203 abuts against the upper surface of the steel plate 8, thereby connecting and fixing one end of the steel plate 8 to the second fixed seat 202. At this time, the steel plate 8 is limited and placed on the upper surface of the feeding rack 2.

[0045] Furthermore, after the steel plate 8 is placed at the feeding rack 2, the hydraulic press 102 at the top of the fixing frame 101 is started through the control panel on one side of the punching machine base 1. This causes the hydraulic press 102 to drive the punching head 103 connected thereto to move towards the first fixing seat 104, and one end of the punching head 103 moves into the interior of the first fixing seat 104. At this time, the end of the punching head 103 that has moved into the interior of the first fixing seat 104 punches the steel plate 8 inserted into the first fixing seat 104.

[0046] Furthermore, after a hole is punched in one part of the steel plate 8, the first motor 307 set in one part of the feeding rack 2 is started by the remote control device, so that the first motor 307 controls the second shaft 305 set there to rotate. At this time, under the action of the conveyor belt 306, the two sets of first shafts 304 connected to the second shaft 305 can be driven to rotate, thereby causing the first shaft 304 and the conveyor screw 302 connected to the first shaft 304 to rotate. Then, under the action of the threaded connection, the threaded block 303 and the second fixed seat 202 connected to the threaded block 303 move along the outer surface of the conveyor screw 302, and the second fixed seat 202 moves towards the punching machine base 1, thereby causing the steel plate 8, which is fixed to the second fixed seat 202, to move in the same direction and distance, so that the punching operation of the steel plate 8 can be performed continuously.

[0047] In addition, the distance that the steel plate 8 moves each time is equal to the distance between two adjacent sets of punches on the steel plate 8. The first motor 307 can automatically move the steel plate 8 at a certain distance under the setting of remote control, so as to automatically move the steel plate 8 to the punching head 103 for punching operation.

[0048] Furthermore, when a portion of the steel plate 8 is punched at the punching head 103, the other portion will move to the connecting frame 401 where the engraving knife 404 is provided. At this time, the controllers 403 provided at the two sets of connecting frames 401 can be remotely controlled to extend the electric telescopic column 402, so that one end of the engraving knife 404 connected to the bottom of the electric telescopic column 402 moves closer to the steel plate 8, so that one end of the engraving knife 404 abuts against the upper surface of the steel plate 8, and the engraving knife 404 provided at the other set of connecting frames 401 abuts against the lower surface of the steel plate 8.

[0049] Furthermore, when the two sets of engraving blades 404 abut against the upper and lower surfaces of the steel plate 8, the second motor 506 set at the connecting seat 501 can be started by the remote control device. The second motor 506 drives the connecting shaft 502 and the gear 503 set at the connecting shaft 502 to rotate in a ring. At this time, under the meshing action between the gear 503 and the gear ring 504, the gear ring 504 and the bearing 505 connected to the gear ring 504 rotate in a ring around the electric telescopic column 402, thereby causing the engraving blades 404 set at the bearing 505 to rotate in a ring, so that the engraving blades 404 can perform pre-cutting processing on the surface of the steel plate 8.

[0050] Furthermore, when the steel plate 8 passes the pre-cut position and is moved to the punching head 103 by the conveying mechanism, the connection strength between the steel plate 8 body at the pre-cut position and the required waste part is reduced, which reduces the punching resistance of the punching head 103, thereby making the punching process of the punching head 103 convenient and smooth, and improving the punching effect of the steel plate 8.

[0051] During this process, before the steel plate 8 is moved to the punch head 103 via the conveying mechanism after the pre-cut position, the controllers 403 set at the two sets of connecting frames 401 can be activated simultaneously through remote control. This causes the controllers 403 set at the two sets of connecting frames 401 to retract a set of electric telescopic columns 402, thereby causing one end of the engraving knife 404 connected to the bottom of the electric telescopic column 402 to move away from the steel plate 8. When one end of the engraving knife 404 is no longer in contact with the surface of the steel plate 8, the electric telescopic column 402 stops retracting, thus avoiding contact between the engraving knife 404 and the parts of the steel plate 8 that do not need to be processed.

[0052] Finally, after the steel plate 8 is punched, the positioning screw 203 set at the second fixed seat 202 can be rotated so that the bottom end of the positioning screw 203 does not contact the surface of the steel plate 8, so that the punched steel plate 8 is discharged to the receiving rack 201 set on one side of the punching machine base 1, so that the workers can collect the punched steel plate 8 at the receiving rack 201.

[0053] 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 piercing apparatus comprising: The utility model relates to a punch machine base (1) and the fixed frame (101) of punch machine base (1) top setting, the top of fixed frame (101) is provided with hydraulic machine (102), the lower surface of hydraulic machine (102) is provided with punch head (103), the inside bottom of fixed frame (101) is provided with first fixed seat (104), one side of punch machine base (1) is provided with feeding frame (2), and the second fixed seat (202) of feeding frame (2) is placed with steel sheet (8) between first fixed seat (104) and second fixed seat (202), characterized by: the feeding mechanism for the convenient feeding of steel sheet (8) is arranged at the feeding frame (2), the feeding mechanism includes guide seat (301), conveying screw rod (302) and first motor (307), the guide seat (301) is arranged on the upper surface of the feeding frame (2), and the inside of the guide seat (301) is provided with conveying screw rod (302), the both ends of the second fixed seat (202) are threadedly connected to the outer surface of the conveying screw rod (302), one end of the conveying screw rod (302) is provided with the first motor (307) for driving the conveying screw rod (302) to rotate, and the first motor (307) is arranged on one end side of the feeding frame (2); The both sides of the second fixed seat (202) are provided with threaded blocks (303), the threaded blocks (303) are limited to slide in the inside of the guide seat (301), and the threaded blocks (303) are threadedly connected to the outer surface of the conveying screw rod (302); One end of the conveying screw rod (302) is provided with the first shaft (304), and one end of the first shaft (304) extends to the outside of the guide seat (301), the second shaft (305) is arranged on one end side of the feeding frame (2) away from the punch machine base (1), one end of the second shaft (305) is connected with the first motor (307), a set of conveying belts (306) are arranged between the first shaft (304) and the second shaft (305), and the feeding frame (2) is provided with a cover (308) for shielding the two sets of conveying belts (306); The upper part and the lower part of one end of the feeding frame (2) close to the punch machine base (1) are provided with a set of pre-punching mechanisms, which facilitate effective punching of the steel sheet (8) by the punch head (103), the pre-punching mechanism includes a connecting frame (401), an electric telescopic column (402) and a marking knife (404), a set of connecting frames (401) are arranged on the upper surface and the lower surface of the adjacent two guide seats (301), a set of electric telescopic columns (402) are arranged on the inner top and the inner bottom of the two connecting frames (401), and one end of the electric telescopic column (402) is provided with the marking knife (404), and the bottom ends of the two marking knives (404) are in contact with the upper surface and the lower surface of the steel sheet (8) respectively. The top of the connecting frame (401) is provided with a controller (403) for controlling the extension and retraction of the electric telescopic column (402), the inner surface of the connecting frame (401) is provided with a control mechanism for controlling the circular rotation of the cutting tool (404), and the path of the circular rotation of the cutting tool (404) is equal to the circumference of the punching head (103).

2. The piercing apparatus according to claim 1, wherein: The control mechanism comprises a connecting seat (501), a connecting shaft (502), a gear (503), a gear ring (504), a bearing (505) and a second motor (506), the connecting seat (501) is arranged on the inner surface of the connecting frame (401), a connecting shaft (502) is arranged at the connecting seat (501), the outer surface of the connecting shaft (502) is provided with a gear (503), the top end of the connecting shaft (502) is connected with the second motor (506) installed at the connecting seat (501), a bearing (505) is arranged at the bottom end of the electric telescopic column (402), and the outer surface of the bearing (505) is provided with a gear ring (504) engaged with the gear (503).

3. A piercing apparatus according to claim 2, wherein: The side of the bearing (505) away from the electric telescopic column (402) is connected with the cutting tool (404), a replacement assembly for replacing the cutting tool (404) is arranged at the bearing (505), the replacement assembly comprises a connecting head (7) and a fixing screw (701), the connecting head (7) is arranged at the side of the bearing (505) away from the electric telescopic column (402), one end of the cutting tool (404) is inserted into the inside of the connecting head (7), and a fixing screw (701) is arranged at one side of the connecting head (7) for connecting and fixing the cutting tool (404) and the connecting head (7).

4. The piercing apparatus according to claim 3, wherein: The inner surface of the connecting frame (401) is provided with a sliding groove (6), the outer surface of one end of the electric telescopic column (402) close to the bearing (505) is provided with a limiting plate (601), and one end of the limiting plate (601) is limited to slide in the inside of the sliding groove (6).

5. The piercing apparatus according to claim 1, wherein: The upper surface of the second fixing seat (202) is rotatably provided with a positioning screw (203), the bottom end of the positioning screw (203) abuts against the upper surface of the steel plate (8) for positioning and fixing the steel plate (8).

6. The piercing apparatus according to claim 1, wherein: The side of the punching machine base (1) away from the feeding frame (2) is provided with a material receiving frame (201) for receiving the steel plate (8) after punching.

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