Lightweight forging die for steel piston blank

Abstract

The utility model relates to metal forging technical field, and disclose a kind of lightweight forging die of steel piston blank, including pedestal, the middle part of pedestal top is equipped with mounting disc one by bolt fixed mounting, the top of mounting disc one is equipped with bottom die, the middle part of the bottom end of bottom die is slidably connected with top rod, the inside of pedestal is equipped with the driving assembly of the driving of top rod, the top of pedestal is slidably equipped with pressing plate, the bottom end support disc of pressing plate;Bottom die and top die are fixed by mounting disc one and mounting disc two, it can be disassembled, it is convenient to replace bottom die and top die, by the sliding connection of pressing plate and pedestal, the position accuracy between top die and bottom die can be maintained, by pressure transmission component, the transmission pressure between pressing plate and support disc can be controlled, when piston blank is forged by the way of static pressure forging, the pressure of pressing plate is avoided to be directly transmitted to support disc.

Description

Technical Field

[0001] This utility model relates to the field of metal forging technology, specifically a lightweight forging die for steel piston blanks. Background Technology

[0002] Forged pistons are key engine components made using metal forging processes. They are produced by plastically deforming metal materials through high-temperature or cold forging, resulting in high strength and high-temperature resistance. In the process of machining steel pistons, it is often necessary to forge the steel piston blank using forging dies.

[0003] The "compressor piston forging die" disclosed in application number "202320674947.5" includes a die box, an installation plate that is slidably assembled inside the die box, a lower die base that is bolted to the upper end face of the installation plate, a die cavity that is formed in the middle of the lower die base, a support plate that is fixedly connected to the upper end face of the installation plate by several support rods, a cylinder that is installed on the upper end face of the support plate, a lifting plate that is fixedly connected to the output end of the cylinder, and an upper die base that is bolted to the bottom of the lifting plate. After the die is opened, the ejector assembly will drive the pusher block to move upward, and the pusher block will push out the piston forging part, thereby making it easier for personnel to remove the piston forging part and avoiding the piston forging part being adsorbed in the die cavity in the lower die base, which would make it difficult for personnel to remove.

[0004] However, the above method still has the following drawbacks: the piston blank can be forged by the lower die holder and the upper die holder, but the upper die holder and the lower die holder are fixedly connected to the lifting plate and the mold box respectively, which makes it inconvenient to disassemble the upper die holder and the lower die holder and difficult to replace. The forging can be pushed out by the pusher block, but it requires the slide plate, transmission plate and support rod for transmission, which takes up a lot of space and increases the weight of the equipment. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this utility model provides a lightweight forging mold for steel piston blanks, which has the advantages of easy installation and disassembly and does not occupy space, thus solving the problems mentioned in the background art.

[0006] This utility model provides the following technical solution: a lightweight forging mold for steel piston blanks, including a base, a mounting plate one fixedly installed at the middle of the top of the base by bolts, a bottom mold fixedly installed at the top of the mounting plate one, a top rod slidably connected at the middle of the bottom end of the bottom mold, a driving assembly for driving the top rod inside the base, a pressure plate slidably installed at the top of the base, a support plate at the bottom end of the pressure plate, a plurality of pressure transmission assemblies for transmitting pressure between the pressure plate and the support plate at the top of the support plate, a second mounting plate two fixedly installed at the middle of the bottom end of the pressure plate by bolts, and a top mold fixedly installed at the middle of the bottom end of the second mounting plate.

[0007] As a preferred technical solution of this utility model, the driving assembly includes a cylinder, one end of which is fixedly connected to the inner wall of one side of the base, a wedge block one is fixedly connected to the telescopic rod of the cylinder, a plurality of balls are rotatably provided on the surface of the wedge block one, a horizontal plate is fixedly connected to the bottom end of the push rod by bolts, a guide strip is provided on one side of the push rod to prevent it from rotating, and a wedge block two corresponding to the position of the wedge block one is fixedly provided at the bottom end of the horizontal plate.

[0008] As a preferred technical solution of this utility model, a guide groove is provided in the middle of the bottom end of the wedge block, and a guide rail that is slidably connected to the guide groove is fixedly provided on the inner wall of the middle of the bottom end of the base. Two upright plates are fixedly provided inside the base to reinforce it, and a channel is provided in the middle of the upright plate, with the guide rail located in the middle of the channel.

[0009] As a preferred embodiment of this utility model, brackets are fixedly provided on both sides of the top of the base, and guide rods are fixedly provided on both sides of the bottom of the pressure plate. The guide rods are slidably connected to the brackets, and mounting holes for installation are provided at the four corners of the bottom of the base and the four corners of the pressure plate.

[0010] As a preferred technical solution of this utility model, protrusions are fixedly provided on both sides of the bottom end of the first mounting plate and both sides of the top end of the second mounting plate. The top end of the base and the bottom end of the support plate are provided with grooves for the protrusions to engage. A pad is fixedly provided in the middle of the top end of the support plate.

[0011] As a preferred embodiment of the present invention, the pressure transmission assembly includes a guide post, the bottom end of which is fixedly connected to the top end of the support plate, a spring is sleeved on the surface of the guide post, the spring is located between the support plate and the pressure plate, a baffle is fixedly provided on the top end of the guide post, and a guide sleeve that is slidably connected to the guide post is fixedly provided on the surface of the pressure plate.

[0012] As a preferred embodiment of this utility model, a mounting base is fixedly provided at the center of the top of the pressure plate, and through holes are provided at the four corners of the top of the mounting base.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The bottom mold and top mold are fixed by mounting plate one and mounting plate two, which can be disassembled and replaced for easy replacement. By sliding the pressure plate to the base, the positional accuracy between the top mold and the bottom mold can be maintained. The pressure transmission component can transmit pressure between the pressure plate and the support plate. When forging the piston blank by static pressure forging, the pressure of the pressure plate is not directly transmitted to the support plate, which can maintain the stability of the pressure between the top mold and the bottom mold, reduce pressure fluctuations, and improve forging quality.

[0014] 2. By horizontally setting the drive component and fixing it inside the base, the horizontal movement can be converted into the vertical movement of the ejector rod, which can then eject the piston blank. The structure is simple, does not take up space, reduces the weight of the equipment, and achieves the lightweighting of the mold. Attached Figure Description

[0015] Figure 1 This is one of the structural schematic diagrams of this utility model; Figure 2 This is the second structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the structure of the base of this utility model; Figure 4 This is a schematic diagram of the structure of the drive component of this utility model; Figure 5 This is a schematic diagram of the pressure transmission component of this utility model.

[0016] In the diagram: 1. Base; 2. Bottom mold; 3. Mounting plate one; 4. Top rod; 5. Drive assembly; 501. Cylinder; 502. Wedge block one; 503. Ball bearing; 504. Guide groove; 6. Horizontal plate; 7. Wedge block two; 8. Pressure plate; 9. Pressure transmission assembly; 901. Guide post; 902. Spring; 903. Baffle; 10. Support plate; 11. Mounting plate two; 12. Top mold; 13. Protrusion; 14. Pad; 15. Mounting seat; 16. Bracket; 17. Guide rod; 18. Vertical plate; 19. Channel; 20. Guide rail; 21. Guide strip. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figures 1-5A lightweight forging die for steel piston blanks includes a base 1. A mounting plate 3 is bolted to the center of the top of the base 1. A bottom mold 2 is fixed to the top of the mounting plate 3. A push rod 4 is slidably connected to the center of the bottom of the bottom mold 2. A drive assembly 5 for driving the push rod 4 is provided inside the base 1. A pressure plate 8 is slidably mounted on the top of the base 1. A support plate 10 is located at the bottom of the pressure plate 8. Several pressure transmission assemblies 9 are provided at the top of the support plate 10 to transmit pressure between the pressure plate 8 and the support plate 10. A second mounting plate 11 is bolted to the center of the bottom of the pressure plate 8. A top mold 12 is fixedly provided in the middle of the bottom end. By driving the pressure plate 8, the top mold 12 and the bottom mold 2 can die-cast the piston blank. The pressure transmission component 9 can transmit pressure between the pressure plate 8 and the support plate 10. When the piston blank is forged by static pressure forging, the pressure of the pressure plate 8 is not directly transmitted to the support plate 10, which can maintain the stability of the pressure between the top mold 12 and the bottom mold 2, reduce pressure fluctuation, and improve the forging quality. By setting the drive component 5 horizontally, the horizontal movement can be converted into the vertical movement of the ejector rod 4, which can eject the piston blank without occupying space. In this embodiment, preferably, the driving assembly 5 includes a cylinder 501. One end of the cylinder 501 is fixedly connected to the inner wall of one side of the base 1. A wedge block 502 is fixedly connected to the telescopic rod of the cylinder 501. A plurality of balls 503 are rotatably provided on the surface of the wedge block 502. A horizontal plate 6 is fixedly connected to the bottom end of the push rod 4 by bolts. A guide strip 21 is provided on one side of the push rod 4 to prevent its rotation. A wedge block 7 corresponding to the position of the wedge block 502 is fixedly provided at the bottom end of the horizontal plate 6. A guide groove 504 is opened in the middle of the bottom end of the wedge block 502. The bottom end of the base 1 is in the middle. The inner wall is fixed with a guide rail 20 that is slidably connected to the guide groove 504. The base 1 is fixed with two vertical plates 18 for reinforcement. The middle of the vertical plate 18 has a channel 19. The guide rail 20 is located in the middle of the channel 19. The cylinder 501 drives the wedge block 502. The guide rail 20 can guide the wedge block 502 through the guide groove 504. The wedge block 502 can drive the push rod 4 to move vertically through the wedge block 7. The ball 503 can reduce the contact friction. The guide bar 21 can guide the push rod 4 and prevent it from rotating, so that the piston blank can be ejected. In this embodiment, preferably, the pressure transmission component 9 includes a guide post 901, the bottom end of which is fixedly connected to the top end of the support plate 10. A spring 902 is sleeved on the surface of the guide post 901, and the spring 902 is located between the support plate 10 and the pressure plate 8. A baffle 903 is fixedly provided on the top end of the guide post 901. A guide sleeve that is slidably connected to the guide post 901 is fixedly provided on the surface of the pressure plate 8. By slidably connecting the guide post 901 and the pressure plate 8, the support plate 10 can be guided, preventing the support plate 10 from tilting. At the same time, the rigid connection between the support plate 10 and the pressure plate 8 is avoided. The spring 902 can evenly transmit the pressure of the pressure plate 8 to the support plate 10. During the static pressure forging of the piston blank, the spring 902 is in a contracted state, which can maintain the stability of the pressure and reduce pressure fluctuations. In this embodiment, preferably, brackets 16 are fixedly provided on both sides of the top of the base 1, and guide rods 17 are fixedly provided on both sides of the bottom of the pressure plate 8. The guide rods 17 are slidably connected to the brackets 16. Mounting holes for mounting are provided at the four corners of the bottom of the base 1 and the four corners of the pressure plate 8. Protrusions 13 are fixedly provided on both sides of the bottom of the mounting plate 11 and the top of the mounting plate 21. Grooves for engaging the protrusions 13 are provided at the top of the base 1 and the bottom of the support plate 10. A pad 14 is fixedly provided in the middle of the top of the support plate 10. The brackets 16 and guide rods 17 can guide the pressure plate 8 and prevent the pressure plate 8 from tilting. The mounting holes can fix the base 1 and the pressure plate 8 on the forging machine. The protrusions 13 and grooves improve the stability of the mounting plate 11 and the mounting plate 21. The pad 14 can prevent the spring 902 from being under excessive pressure and causing damage to the spring 902. In this embodiment, preferably, a mounting base 15 is fixedly provided at the middle of the top of the pressure plate 8, and through holes are provided at the four corners of the top of the mounting base 15. The pressure plate 8 can be connected to the drive component of the forging machine through the through holes of the mounting base 15.

[0019] In use, firstly, the base 1 is fixed to the forging machine through the mounting holes, then the pressure plate 8 is fixed to the lifting plate of the forging machine through the mounting holes, then the pressure plate 8 is connected to the drive component of the forging machine through the through holes, then the protrusions 13 of the mounting disc 11 and the mounting disc 21 are engaged with the grooves, and finally the mounting disc 11 and the mounting disc 21 are fixed with bolts to complete the installation of the bottom mold 2 and the top mold 12. After the bottom mold 2 and the top mold 12 are installed, the piston blank is placed on the bottom mold 2. Then, the pressure plate 8 is driven to descend by the drive component of the forging machine. The bracket 16 and the guide rod 17 can guide the pressure plate 8 and prevent the pressure plate 8 from tilting. The guide post 901 of the pressure transmission component 9 is slidably connected to the pressure plate 8 and can guide the support plate 10 to prevent the support plate 10 from tilting. At the same time, it avoids the rigid connection between the support plate 10 and the pressure plate 8. The spring 902 can evenly transmit the pressure of the pressure plate 8 to the support plate 10. During the static pressure forging of the piston blank, the spring 902 is in a contracted state to maintain the stability of the pressure and reduce pressure fluctuations. The vertical plate 18 can reinforce the interior of the base 1 and improve the compressive strength of the base 1. After the piston blank is forged by hydrostatic pressure, the lifting plate 8 is raised, and then the cylinder 501 drives the wedge block 502 to move horizontally. The guide rail 20 guides the wedge block 502 through the guide groove 504. The wedge block 502 drives the push rod 4 to move vertically through the wedge block 7. The ball 503 reduces the contact friction. The guide bar 21 guides the push rod 4 and prevents it from rotating. When the push rod 4 moves vertically, it can push out the piston blank. After the push is completed, the cylinder 501 controls the wedge block 502 to reset. The push rod 4 and the wedge block 7 can fall back by their own weight. When it is necessary to disassemble and replace the bottom mold 2 and the top mold 12, the workers loosen the bolts fixing the mounting plate 1 3 and the mounting plate 2 11, and then loosen the bolts fixing the horizontal plate 6 to separate it from the top rod 4. Then the protrusion 13 can be pulled out from the groove, so that the bottom mold 2 and the top mold 12 can be disassembled and replaced.

[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lightweight forging die for a steel piston blank, comprising a base (1), characterized in that: The base (1) has a mounting plate 1 (3) fixedly installed at the middle of the top end by bolts. The top end of the mounting plate 1 (3) is fixedly provided with a bottom mold (2). The bottom end of the bottom mold (2) is slidably connected with a top rod (4). The base (1) is provided with a drive assembly (5) for driving the top rod (4). The top end of the base (1) is slidably provided with a pressure plate (8). The bottom end of the pressure plate (8) is supported by a plate (10). The top end of the support plate (10) is provided with several pressure transmission assemblies (9) for transmitting pressure between the pressure plate (8) and the support plate (10). The bottom end of the pressure plate (8) is fixedly installed with a mounting plate 2 (11) by bolts. The bottom end of the mounting plate 2 (11) is fixedly provided with a top mold (12).

2. The lightweight forging die for steel piston blanks according to claim 1, characterized in that: The drive assembly (5) includes a cylinder (501), one end of which is fixedly connected to the inner wall of one side of the base (1). The telescopic rod of the cylinder (501) is fixedly connected to a wedge block one (502). The surface of the wedge block one (502) is rotatably provided with a number of balls (503). The bottom end of the push rod (4) is fixedly connected to a horizontal plate (6) by bolts. The side of the push rod (4) is provided with a guide strip (21) to prevent it from rotating. The bottom end of the horizontal plate (6) is fixedly provided with a wedge block two (7) corresponding to the position of the wedge block one (502).

3. The lightweight forging die for steel piston blanks according to claim 2, characterized in that: The wedge block (502) has a guide groove (504) in the middle of its bottom end. The inner wall of the base (1) is fixed with a guide rail (20) that is slidably connected to the guide groove (504). The base (1) has two upright plates (18) fixed inside to reinforce it. The upright plate (18) has a channel (19) in the middle of its middle. The guide rail (20) is located in the middle of the channel (19).

4. The lightweight forging die for steel piston blanks according to claim 1, characterized in that: The base (1) has brackets (16) fixed on both sides of the top end, and guide rods (17) are fixed on both sides of the bottom end of the pressure plate (8). The guide rods (17) are slidably connected to the brackets (16). The four corners of the bottom end of the base (1) and the four corners of the pressure plate (8) are provided with mounting holes for installation.

5. The lightweight forging die for steel piston blanks according to claim 1, characterized in that: Both sides of the bottom of the first mounting plate (3) and both sides of the top of the second mounting plate (11) are fixedly provided with protrusions (13). The top of the base (1) and the bottom of the support plate (10) are provided with grooves for the protrusions (13) to engage. The middle of the top of the support plate (10) is fixedly provided with a pad (14).

6. The lightweight forging die for steel piston blanks according to claim 1, characterized in that: The pressure transmission assembly (9) includes a guide post (901), the bottom end of which is fixedly connected to the top end of the support plate (10), a spring (902) is sleeved on the surface of the guide post (901), the spring (902) is located between the support plate (10) and the pressure plate (8), a baffle (903) is fixedly provided on the top end of the guide post (901), and a guide sleeve that is slidably connected to the guide post (901) is fixedly provided on the surface of the pressure plate (8).

7. The lightweight forging die for steel piston blanks according to claim 1, characterized in that: The pressure plate (8) has a mounting base (15) fixedly installed at the middle of its top end, and the mounting base (15) has through holes at its four corners.

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