Movable composite stamping die for efficiently producing end plate and production method

Abstract

The invention relates to the field of concrete pile end plate machining, in particular to a movable composite stamping die for efficiently producing an end plate and a production method.The die comprises a primary stamping assembly and a secondary stamping assembly, and the primary stamping assembly is composed of a primary stamping punch on a punch fixing plate, a primary stamping cover plate, a primary stamping die withdrawing plate and a primary stamping lower die; and a secondary stamping assembly is formed by a secondary stamping punch on the punch fixing plate, a secondary stamping cover plate, a secondary stamping die withdrawing plate and a secondary stamping lower die. The upper die fixing plate is connected with a piston cylinder of the hydraulic oil cylinder to provide stamping power. The punch fixing plate can move horizontally and is provided with two sets of punches, and the different punches are located below the upper die fixing plate after moving and conduct primary punching and secondary punching correspondingly. The punch cover plate assembly comprises a primary punching cover plate and a secondary punching cover plate. And the die withdrawing plate assembly comprises a primary stamping die withdrawing plate and a secondary stamping die withdrawing plate. Various concrete pile end plates can be efficiently and accurately produced.

Description

Technical Field

[0001] This invention belongs to the field of concrete pile end plate processing, specifically relating to a mobile composite stamping mold and production method for efficiently producing concrete pile end plates. Background Technology

[0002] Concrete pile end plates are used to anchor prestressed steel bars during concrete pile production. Installed at the ends of the concrete pile, the end plates enhance the load-bearing capacity of the pile tip, evenly distribute the load from the superstructure, reduce stress concentration at the pile tip, and prevent localized failure. The end plates reduce the deformation of the pile tip under load, improving the overall stiffness and stability of the pile foundation. Furthermore, for precast concrete piles, the end plates can be welded or mechanically connected, serving as a carrier for connecting pile segments, enabling the splicing of multiple pile segments and facilitating control of pile length during construction to adapt to different geological conditions.

[0003] As per the instruction manual Figure 1 As shown, the key structural features of traditional end plates include tension traction threaded holes (larger), anchor countersunk holes (relatively smaller), connecting through slots, and external rounding. Currently, the industry mainly processes these using corner cutting machines, two types of punching machines, tapping machines, and grooving machines. The blanks need to be disassembled, transported, positioned, and processed on multiple machines, resulting in long processing times, low efficiency, and a large workforce. Our company has invented a composite stamping rotary die that allows countersunk holes, through holes, strip slots, and rounded corners to be stamped on a single press, positioned in one operation, with high precision. Only one worker is required, significantly reducing labor intensity and the time spent disassembling, transporting, and positioning on various machines. The patents involved are: CN111266464B A multi-feature composite stamping rotary die for tension plates and its working method, which discloses a specific rotary die structure; CN111230230B A tapping device for notched holes and its working method, which discloses a post-tapping method for tension traction threaded holes with notched corners; CN111375995B A high-efficiency and high-precision processing technology for prestressed tension plates, which discloses an improved production process using a multi-feature composite stamping rotary die.

[0004] During subsequent research and development, the applicant discovered that the existing composite stamping rotary dies still have the following problems that need to be solved: 1. As per the instruction manual Figure 2 As shown, because the process involves rotating and avoiding obstacles, and then stamping twice to sequentially process the countersunk hole, through hole, and slot, the resulting concrete pile end plates can only be centrally symmetrical. Otherwise, after rotation, the countersunk hole, through hole, and slot cannot correspond one-to-one. Therefore, our company mainly uses composite stamping rotary dies to produce end plates for pipe piles and hollow square piles. This method is currently not applicable to rectangular or irregularly shaped prestressed concrete pile end plates. 2. As per the instruction manual Figure 2 ,3 As shown in Figure 4, there are actually two sets of features on the rotating plate, punch plate, and ejector plate of the composite stamping rotary die: one set is countersunk holes, and the other set is through holes and strip grooves. Due to the large number of features, when there are a large number of main reinforcing bars, such as 12 sets of countersunk holes, through holes and strip grooves, they cannot effectively avoid each other. Therefore, there is an urgent need to design a new end plate production mold and production method to solve the problems of insufficient versatility and lack of design space when there are a large number of tension traction threaded holes. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the existing technology, the purpose of this invention is to provide an improved horizontal moving stamping die that can produce various types of concrete pile end plates, including rectangular and irregular shapes, without being limited by the number and size of tensioning holes, and can complete the processing of end plates efficiently and accurately.

[0006] This invention adopts the following technical solution: a high-efficiency mobile composite stamping die for producing end plates, comprising: The upper die fixing plate is connected to the piston cylinder of the hydraulic cylinder to provide stamping power. The punch fixing plate is horizontally movable and is equipped with two sets of punches: punches for primary punching include connecting hole reinforcing punches and head anchoring countersunk hole reinforcing and countersunk hole punches; punches for secondary punching include rounded corner punches, connecting hole through punches, and through slot punches. The punch cover plate assembly includes a primary stamping cover plate and a secondary stamping cover plate, located between the upper die fixing plate and the punch fixing plate. The primary stamping cover plate and the secondary stamping cover plate are respectively connected to the punch fixing plate and move with it. The ejection template assembly includes a primary stamping ejection template and a secondary stamping ejection template, which are respectively connected to the lower surface of the punch fixing plate. The primary stamping ejection template is provided with a primary stamping through hole, and the secondary stamping ejection template is provided with a secondary stamping through hole. The lower die fixing plate is horizontally movable and has two sets of lower dies: the primary stamping lower die has a recess for reinforcing protrusion forming; the secondary stamping lower die has a rounded corner cutter and blanking hole, and the end plate is placed and positioned on the lower die fixing plate. The lower mold support plate is located below the lower mold fixing plate and supports the lower mold fixing plate and the rounded corner cutter.

[0007] According to another embodiment of the invention or any of the foregoing embodiments, in the movable composite stamping die, the primary stamping punch, the primary stamping cover plate, the primary stamping ejector plate, and the primary stamping lower die on the punch fixing plate constitute a primary stamping assembly. The secondary stamping punch, secondary stamping cover plate, secondary stamping ejection plate, and secondary stamping lower die on the punch fixing plate constitute the secondary stamping assembly. The punch fixing plate is not punched through during the first punching; it is punched through during the second punching. The primary stamping cover plate is equipped with rounded corner pressure blocks and primary stamping pressure blocks; the secondary stamping cover plate is equipped with rounded corner pressure blocks and secondary stamping pressure blocks.

[0008] According to another embodiment of the invention or any of the foregoing embodiments, the movable composite stamping die is provided with at least one of the following for horizontal movement at the rear of the punch fixing plate: a cylinder, a hydraulic cylinder, a gear rack, or a timing belt.

[0009] According to another embodiment of the invention or any of the foregoing embodiments, a movable composite stamping die is provided, wherein a translation cylinder is respectively installed on the rear part of the punch fixing plate and the lower die fixing plate, and the die is provided with two limit blocks at the front and rear for positioning during primary stamping and secondary stamping; guide rails and sliders are installed on both sides of the punch fixing plate; the punch fixing plate is provided with primary stamping fixing holes and secondary stamping fixing holes.

[0010] According to another embodiment of the invention or any of the foregoing embodiments, the movable composite stamping die is provided with a plurality of guide sleeve holes, the upper die fixing plate is sleeved on the guide post, and the slider of the punch fixing plate is fixed to the guide post.

[0011] According to another embodiment of the invention or any of the foregoing embodiments, a movable composite stamping die is provided, wherein multiple nitrogen springs are respectively installed on the primary stamping ejection plate and the secondary stamping ejection plate for ejection, nitrogen spring mounting holes are provided on the primary stamping ejection plate and the secondary stamping ejection plate, a primary stamping through hole is provided on the primary stamping ejection plate and a secondary stamping through hole is provided on the secondary stamping ejection plate; a nitrogen spring through hole is provided on the punch fixing plate, and nitrogen spring pressure blocks are installed on the primary stamping cover plate and the secondary stamping cover plate.

[0012] According to another embodiment of the invention or any of the foregoing embodiments, the movable composite stamping die further includes a blanking support plate and a lower die base plate. There are multiple blanking support plates arranged vertically to facilitate blanking after secondary stamping. The lower die base plate is installed below the blanking support plates and serves as a support and connection.

[0013] According to another embodiment of the invention or any of the foregoing embodiments, the mobile composite stamping die further includes a discharge conveyor belt installed between the blanking support plates to circulate and transport the stamping blank out of the die, avoiding accumulation.

[0014] According to another embodiment of the invention or any of the foregoing embodiments, the mobile composite stamping die further includes an auxiliary demolding mechanism, which is a cylinder or a demolding cam, installed in the lower die fixing plate. After the secondary stamping, the formed end plate is lifted from the blanking hole to facilitate unloading by a robot or by a person.

[0015] Accordingly, a mobile composite stamping production method for efficiently producing end plates is disclosed, comprising the following steps: S1. The robotic arm or operator removes the pre-processed end plate and places the new blank inside. S2. The stamping assembly is in the stamping station. The punch fixing plate, punch cover plate and ejection plate of the stamping assembly are located under the upper die fixing plate. The stamping is performed to reinforce and process the anchoring countersunk hole. At this time, the two punches of the connecting hole and the anchoring countersunk hole cooperate with the recess of the lower die fixing plate to form a protrusion at the bottom of the blank. S3. The punch fixing plate moves the punch cover plate and the ejection plate, and the lower die fixing plate also moves, so that the secondary stamping assembly is in the stamping station to perform secondary stamping, and the rounded corners, connecting holes and through slots are punched out. S4. The punch fixing plate drives the punch cover plate and the ejector plate to reset, the lower die fixing plate moves and resets, the end plate punching is completed, the end plate is demolded and unloaded, and the subsequent connection hole thread processing is carried out, and the next blank is processed.

[0016] The beneficial effects of this invention are: 1. The present invention discloses a mobile composite stamping mold and production method for high-efficiency production of end plates. By moving horizontally and stamping twice, the anchoring holes and connecting holes of the prestressed concrete pile end plates are reinforced and stamped, thereby improving the strength of the anchoring holes and connecting holes of the end plates and reducing the amount of steel used in the production of end plates. 2. Compared with composite stamping rotary mold, the present invention is no longer limited by whether the end plate pier head anchoring sink hole and connecting hole are centrally symmetrical. It can be used to produce end plates of various types of prestressed concrete piles, including rectangular and irregular shapes, and has strong applicability.

[0017] 3. The present invention arranges the primary stamping punch and the secondary stamping punch horizontally on a long punch fixing plate, which avoids the problem that the composite stamping rotary die cannot effectively arrange the numerous end plate anchoring countersunk holes and connecting holes. 4. This invention is easy to work with robotic arms, which can save a lot of manpower, improve processing accuracy, save processing preparation time, improve processing efficiency, and reduce costs. Attached Figure Description

[0018] Figure 1 The present invention provides a perspective view and a cross-sectional view of the 8-hole end plate with connecting slots according to the present invention. Figure 2 A top view of the rotating plate of a traditional compound stamping rotary die; Figure 3 A top view of the connecting plate of a traditional composite stamping rotary die; Figure 4 This is a top view of the punch plate of a traditional composite stamping rotary die; Figure 5 A three-dimensional schematic diagram of a mobile composite stamping die for producing 12-hole end plates. Figure 6 A side view of a movable composite stamping die for producing 12-hole end plates. Figure 7 This is a top view of the connection between the movable composite stamping die with the upper die fixing plate removed and the translation mechanism in Embodiment 2. Figure 8 A top view of the primary and secondary stamping cover plates of a mobile composite stamping die for producing 12-hole end plates. Figure 9 A top view of the punch fixing plate of a movable composite stamping die for producing 12-hole end plates. Figure 10 A top view of the primary and secondary stamping retraction plates of a mobile composite stamping die for producing 12-hole end plates. Figure 11 A top view of the lower die support plate of a movable composite stamping die for producing 12-hole end plates. Figure 12 A top view of the lower die fixing plate of a movable composite stamping die for producing 8-hole end plates. Figure 13 A side view of the lower mold, which is internally equipped with a demolding cam and a discharge conveyor belt; Figure 14 This is a process flow diagram of the mobile composite production method for high-efficiency production of end plates according to the present invention. In the diagram: 100, end plate; 101, anchorage hole at the pier head; 102, connecting hole; 103, connecting groove; 104, rounded corner; 200. Upper mold fixing plate; 300. Punch cover plate assembly; 301. Primary stamping cover plate; 302. Secondary stamping cover plate; 303. Rounded corner pressure block; 304. Primary stamping pressure block; 305. Secondary stamping pressure block; 306. Nitrogen spring pressure block; 400. Punch fixing plate; 401. Translation cylinder; 402. Guide rail; 403. Slider; 404. Nitrogen spring through hole; 405. Primary stamping fixing hole; 406. Secondary stamping fixing hole; 500, Template release assembly; 501, Primary stamping template release; 502, Secondary stamping template release; 503, Nitrogen spring; 504, Primary stamping through hole; 505, Secondary stamping through hole; 506, Nitrogen spring mounting hole; 600. Lower mold fixing plate; 601. Recess; 602. Material discharge hole; 603. Demolding cam; 700. Lower mold support plate; 800. Material discharge support plate; 801. Material discharge conveyor belt; 900. Lower mold base plate. Detailed Implementation

[0019] 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. Example

[0020] like Figure 1 , 5 As shown in Figure 6, the primary stamping punch on the punch fixing plate 400, together with the primary stamping cover plate 301, the primary stamping ejection plate 501, and the primary stamping lower die, constitutes a primary stamping assembly; the secondary stamping punch on the punch fixing plate 400, together with the secondary stamping cover plate 302, the secondary stamping ejection plate 502, and the secondary stamping lower die, constitutes a secondary stamping assembly.

[0021] like Figure 5 , 8 As shown, the upper die fixing plate 200 is connected to the piston cylinder of the hydraulic cylinder to provide stamping power. The upper die fixing plate 200 is provided with multiple guide sleeve holes. The upper die fixing plate 200 is sleeved on the guide post. The slider 403 of the punch fixing plate 400 is fixed to the guide post.

[0022] like Figure 5 , 7 As shown in Figure 9, the punch fixing plate 400 can move horizontally and is equipped with two sets of punches. After moving, different punches are located below the upper die fixing plate 200 and perform primary and secondary punching respectively. The punches used for primary punching include the connecting hole 102 reinforcing punch and the anchor head countersunk hole 101 reinforcing and countersunk hole punch, which do not penetrate during primary punching. The punches used for secondary punching include the rounded corner 104 punch, the connecting hole 102 through punch, and the through slot punch, which penetrate during secondary punching.

[0023] like Figure 5 , 6As shown in Figure 8, the punch cover plate assembly 300 includes a primary stamping cover plate 301 and a secondary stamping cover plate 302, located between the upper die fixing plate 200 and the punch fixing plate 400. The primary stamping cover plate 301 and the secondary stamping cover plate 302 are respectively connected to the punch fixing plate 400 and move with it. The primary stamping cover plate 301 is provided with rounded corner pressure blocks 303 and primary stamping pressure blocks 304; the secondary stamping cover plate 302 is provided with rounded corner pressure blocks 303 and secondary stamping pressure blocks 305.

[0024] like Figure 5 , 10 The ejection die assembly 500 shown includes a primary ejection die 501 and a secondary ejection die 502, which are respectively connected to the lower surface of the punch fixing plate 400. The primary ejection die 501 is provided with a primary ejection through hole 504, and the secondary ejection die 502 is provided with a secondary ejection through hole 505. Multiple nitrogen springs 503 are installed on the primary ejection die 501 and the secondary ejection die 502 for ejection. The primary ejection die 501 and the secondary ejection die 502 are provided with nitrogen spring mounting holes 506, the primary ejection die 501 is provided with a primary ejection through hole 504, and the secondary ejection die 502 is provided with a secondary ejection through hole 505. The punch fixing plate 400 is provided with a nitrogen spring through hole 404, and nitrogen spring pressure blocks 306 are installed on the primary ejection cover plate 301 and the secondary ejection cover plate 302.

[0025] like Figure 5 , 11 As shown in Figure 12, the lower die fixing plate 600 can move horizontally and is equipped with two sets of lower dies: the primary stamping lower die is equipped with a recess 601 for forming reinforcing protrusions; the secondary stamping lower die is equipped with a rounded corner cutter 104 and a blanking hole 602. like Figure 5 , 11 As shown, the lower mold support plate 700 is located below the lower mold fixing plate 600 and supports the lower mold fixing plate 600 and the rounded corner 104.

[0026] like Figure 6 , 13 As shown, there are multiple blanking support plates 800 arranged vertically to facilitate blanking after secondary stamping; the lower die base plate 900 is installed below the blanking support plates 800, serving a supporting and connecting function. The discharge conveyor belt 801 is installed between the blanking support plates 800 to circulate and transport the stamped blanks out of the die, avoiding accumulation. Example

[0027] Other features are the same as in Implementation 1, except that the punch fixing plate 400 and the lower die fixing plate 600 are respectively equipped with translation cylinders 401, and the die is provided with two limit blocks at the front and rear for positioning during the first and second stamping; guide rails 402 and sliders 403 are installed on both sides of the punch fixing plate 400 to ensure stability and accuracy during horizontal movement; the punch fixing plate 400 is provided with a first stamping fixing hole 405 and a second stamping fixing hole 406.

[0028] It should be noted that the horizontal drive method of the punch fixing plate 400 is not limited to the form of the translation cylinder 401. The rear of the punch fixing plate 400 may be equipped with at least one of the following for horizontal movement: cylinder, oil cylinder, gear rack, synchronous belt. Example

[0029] like Figure 13 As shown, other features are the same as in Embodiment 1, except that it also includes an auxiliary demolding mechanism, which is a cylinder or demolding cam 603, installed in the lower mold fixing plate 600. After the second stamping, it lifts the formed end plate 100 from the blanking hole 602, which is convenient for the robot or manual unloading.

[0030] Accordingly, a mobile composite stamping production method for efficiently producing end plates 100 is disclosed, such as... Figure 14 As shown, it includes the following steps: First, either a robotic arm or a manual operator removes the pre-processed end plate 100 and places in the new blank. Then, the stamping assembly is in the stamping station. The punch fixing plate 400, punch cover plate, and ejection plate of the stamping assembly are located under the upper die fixing plate 200. The stamping is performed to strengthen and process the anchoring countersunk hole. At this time, the two punches of the connecting hole 102 and the head anchoring countersunk hole 101 cooperate with the recess 601 of the lower die fixing plate 600 to form a protrusion at the bottom of the blank. Next, the punch fixing plate 400 drives the punch cover plate and the ejection plate to move, and the lower die fixing plate 600 also moves, so that the secondary stamping assembly is in the stamping station and performs secondary stamping, punching out the rounded corner 104, the connecting hole 102, and the through groove. Finally, the punch fixing plate 400 drives the punch cover plate and the ejector plate to reset, the lower die fixing plate 600 moves and resets, the end plate 100 completes the stamping, the end plate 100 is demolded and unloaded, and the subsequent thread processing of the connecting hole 102 is carried out, and the next blank is processed.

[0031] Working principle of the invention: The reason why the anchorage countersinking hole 101, connecting hole 102, connecting through groove 103, and rounded corner 104 of the pier head cannot be punched in one go is that the anchorage countersinking hole 101 is a countersinking hole and must be punched separately. The patents applied for by our company, CN111266464B (A Multi-Feature Composite Stamping Rotary Die for Tensioning Plates and its Working Method), CN111230230B (Tapping Device Applicable to Notched Holes and its Working Method), and CN111375995B (A High-Efficiency and High-Precision Processing Technology for Prestressed Tensioning Plates), involve composite stamping rotary dies that can punch out the anchorage countersinking hole 101, connecting hole 102, connecting through groove 103, and rounded corner 104 of the pier head in two punches on a single stamping die. However, these dies can only punch the end plates 100 corresponding to pipe piles and hollow square piles, and cannot punch more than 12 sets of anchorage countersinking holes 101 and connecting holes 102 because the area is limited and cannot be avoided. This invention arranges the primary and secondary stamping punches horizontally on a long punch fixing plate 400, avoiding the problem of the composite stamping rotary die being unable to effectively arrange the numerous end plate 100 anchoring holes 101 and connecting holes 102. It can also be used to produce end plates 100 for various types of prestressed concrete piles, including rectangular and irregular shapes, making it highly versatile.

[0032] In subsequent research and development, our company disclosed two patents: CN113073634A, "A Locally Reinforced Precast Pile End Plate 100 and Its Processing Method," and CN215252815U, "A Material-Saving Precast Pile End Plate 100." These patents achieve the effect of reducing the thickness of the end plate 100 and saving more than 10% of steel by locally reinforcing locations such as the tensioning threaded hole and the anchoring countersinking hole 101. In this invention, the anchoring countersinking hole 101 (which is a countersinking hole) can be processed not only in a single stamping operation, but also locally reinforced through the cooperation of the inserts on the lower die.

[0033] 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 above embodiments are merely illustrative of the technical concept and characteristics of the present invention, intended to enable those skilled in the art to understand and implement the invention, and should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A high-efficiency mobile composite stamping die for producing end plates, characterized in that: include: The upper die fixing plate (200) is connected to the piston cylinder of the hydraulic cylinder to provide stamping power. The punch fixing plate (400) is horizontally movable and is equipped with two sets of punches: the punches for primary punching include the connecting hole (102) reinforcing punch and the pier head anchoring countersinking hole (101) reinforcing and countersinking punch; the punches for secondary punching include the rounded corner (104) punch, the connecting hole (102) through punch and the through slot punch. The punch cover plate assembly (300) includes a primary stamping cover plate (301) and a secondary stamping cover plate (302), located between the upper die fixing plate (200) and the punch fixing plate (400). The primary stamping cover plate (301) and the secondary stamping cover plate (302) are respectively connected to the punch fixing plate (400) and move with it. The ejection template assembly (500) includes a primary stamping ejection template (501) and a secondary stamping ejection template (502), which are respectively connected to the lower surface of the punch fixing plate (400). The primary stamping ejection template (501) is provided with a primary stamping through hole (504), and the secondary stamping ejection template (502) is provided with a secondary stamping through hole (505). The lower die fixing plate (600) is horizontally movable and has two sets of lower dies: the primary stamping lower die has a recess (601) for forming reinforcing protrusions; the secondary stamping lower die has a rounded corner (104) cutter and a blanking hole (602), and the end plate (100) is placed and positioned on the lower die fixing plate (600). The lower mold support plate (700) is located below the lower mold fixing plate (600) and supports the lower mold fixing plate (600) and the rounded corner (104) cutter.

2. The mobile composite stamping die for high-efficiency production of end plates according to claim 1, characterized in that: The primary stamping punch on the punch fixing plate (400), together with the primary stamping cover plate (301), the primary stamping ejection plate (501), and the primary stamping lower die, constitute a primary stamping assembly. The secondary stamping punch, secondary stamping cover plate (302), secondary stamping ejection plate (502), and secondary stamping lower die on the punch fixing plate (400) constitute a secondary stamping assembly. The punch fixing plate (400) is not punctured during the first punching; it is punctured during the second punching. A rounded corner block (303) and a primary stamping block (304) are provided on the primary stamping cover plate (301); a rounded corner block (303) and a secondary stamping block (305) are provided on the secondary stamping cover plate (302).

3. A high-efficiency mobile composite stamping die for producing end plates according to claim 1 or 2, characterized in that: The rear of the punch fixing plate (400) is equipped with at least one of the following for horizontal movement: a cylinder, a hydraulic cylinder, a gear rack, or a timing belt.

4. The mobile composite stamping die for high-efficiency production of end plates according to claim 1, characterized in that: The punch fixing plate (400) and the lower die fixing plate (600) are respectively equipped with translation cylinders (401). The die is provided with two limit blocks at the front and rear for positioning during the first and second stamping. Guide rails (402) and sliders (403) are installed on both sides of the punch fixing plate (400). The punch fixing plate (400) is provided with a first stamping fixing hole (405) and a second stamping fixing hole (406).

5. The mobile composite stamping die for high-efficiency production of end plates according to claim 4, characterized in that: The upper mold fixing plate (200) is provided with multiple guide sleeve holes. The upper mold fixing plate (200) is sleeved on the guide post, and the slider (403) of the punch fixing plate (400) is fixed to the guide post.

6. The mobile composite stamping die for high-efficiency production of end plates according to claim 1, characterized in that: Multiple nitrogen springs (503) are installed on the primary stamping ejection platen (501) and the secondary stamping ejection platen (502) for ejection. Nitrogen spring mounting holes (506) are provided on the primary stamping ejection platen (501) and the secondary stamping ejection platen (502). A primary stamping through hole (504) is provided on the primary stamping ejection platen (501), and a secondary stamping through hole (505) is provided on the secondary stamping ejection platen (502). A nitrogen spring through hole (404) is provided on the punch fixing plate (400), and nitrogen spring pressure blocks (306) are installed on the primary stamping cover plate (301) and the secondary stamping cover plate (302).

7. A high-efficiency mobile composite stamping die for producing end plates according to claim 1 or 4, characterized in that: It also includes a blanking support plate (800) and a lower die base plate (900). There are multiple blanking support plates (800) arranged vertically to facilitate blanking after secondary stamping. The lower die base plate (900) is installed below the blanking support plate (800).

8. A high-efficiency mobile composite stamping die for producing end plates according to claim 1 or 4, characterized in that: It also includes a discharge conveyor belt (801), installed between the blanking support plates (800), to circulate and transport the stamped blanks out of the mold.

9. The mobile composite stamping die for high-efficiency production of end plates according to claim 1, characterized in that: It also includes an auxiliary demolding mechanism, which is a cylinder or demolding cam (603), installed in the lower mold fixing plate (600). After the second stamping, it lifts the formed end plate (100) from the blanking hole (602) to facilitate unloading by a robot or manual.

10. A mobile composite stamping production method for efficiently producing end plates (100), characterized in that: Includes the following steps: S1. The robotic arm or a person removes the pre-processed end plate (100) and places the new blank inside. S2. The stamping assembly is in the stamping station. The punch fixing plate (400), punch cover plate, and ejection plate of the stamping assembly are located under the upper die fixing plate (200) for a first stamping and reinforcement, and the anchoring countersink is processed. At this time, the two punches of the connecting hole (102) and the head anchoring countersink (101) cooperate with the recess (601) of the lower die fixing plate (600) to form a protrusion at the bottom of the blank. S3. The punch fixing plate (400) drives the punch cover plate and the ejection plate to move, and the lower die fixing plate (600) also moves, so that the secondary stamping assembly is in the stamping station and performs secondary stamping, and the rounded corner (104), connecting hole (102) and through groove are punched out. S4. The punch fixing plate (400) drives the punch cover plate and the ejector plate to reset, the lower die fixing plate (600) moves and resets, the end plate (100) completes the stamping, the end plate (100) is demolded and unloaded, the subsequent connection hole (102) thread processing is carried out, and the next blank is processed.

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