Hydraulic cylinder casting device

Abstract

The utility model relates to foundry equipment technical field, and disclose a kind of hydraulic oil cylinder foundry equipment, including foundry frame, lower mould and upper mould, the upper end middle place of lower mould is provided with cavity, the inner right wall of mould core is fixedly connected with fixed push plate, the inner left wall of mould core is installed with dynamic push plate, fixed push plate and dynamic push plate between in middle place are all fixedly connected with limit T seat, pull spring is installed between limit T seat, the left end of fixed push plate is rotatably installed with abutment plate in the place close to upper and lower two sides, the upper end middle place of mould core is penetrated with pressure rod, the lower end of pressure rod is provided with limit plate, the lower end of limit plate is fixedly connected with wedge head one. The device can realize disposable forming of cylinder upper and lower oil port during casting process, avoid the step of oil port post-processing in traditional process, reduce processing procedure and production cost, simplify the operation process of parting and picking, improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of casting equipment technology, and in particular to a hydraulic cylinder casting device. Background Technology

[0002] In the field of hydraulic cylinder manufacturing, the cylinder barrel is a key component, and its casting quality directly affects the performance and reliability of the hydraulic cylinder. Although the traditional sand casting method is widely used, there are some insurmountable problems in the cylinder barrel casting process. For example, cylinder barrels produced by sand casting are prone to defects such as porosity and sand holes, resulting in poor sealing and wear resistance, making it difficult to meet the stringent quality requirements of high-precision hydraulic systems.

[0003] Currently, while some casting equipment on the market can improve cylinder quality to some extent, it still falls short in terms of production efficiency. Some equipment cannot directly cast the upper and lower oil ports of the cylinder, requiring post-processing, which increases the production process and costs. Moreover, the casting removal process is relatively cumbersome or the ejection structure is complex, affecting overall production efficiency or increasing production costs. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a hydraulic cylinder casting device, which has the advantages of improving cylinder quality, reducing internal defects, directly casting cylinder oil ports, and facilitating the removal of castings, thus solving some of the problems mentioned in the background technology.

[0005] This utility model provides the following technical solution: a hydraulic cylinder casting device, including a casting frame, a lower mold and an upper mold. A cavity is provided in the middle of the upper end of the lower mold. A matching mold core is placed inside the cavity. A fixed push plate is fixedly connected to the inner right wall of the mold core. A movable push plate is installed on the inner left wall of the mold core. A limit T-seat is fixedly connected between the fixed push plate and the movable push plate in the middle. A tension spring is installed between the limit T-seats. A stop plate is rotatably installed on the left end of the fixed push plate near the upper and lower sides. A pressure rod passes through the middle of the upper end of the mold core. A limit plate is provided at the lower end of the pressure rod. A wedge head is fixedly connected to the lower end of the limit plate. A linkage frame is fixedly connected to the middle of the front and rear ends of the wedge head. A second wedge head is fixedly installed inside the linkage frame near the lower side. The first wedge head and the second wedge head are respectively pressed against the stop plate.

[0006] Furthermore, the lower mold is installed at the middle of the upper end of the worktable of the casting frame, and the upper mold is slidably installed on the upper side of the upper and lower molds of the casting frame. In the traditional design, the upper mold is driven to press down by a hydraulic cylinder to close the mold.

[0007] Furthermore, push rods are fixedly connected to the left end of the moving push plate near the upper and lower sides, and oil port grooves are provided on the left end of the cavity at both the upper and lower sides. The left end of the push rod penetrates the cavity and abuts into the inside of the oil port groove. The oil port groove and the push rod fit together. This is a design for reserving oil ports for the cylinder, while preventing molten iron from entering the oil port groove.

[0008] Furthermore, the upper end of the pressure rod is fixedly connected to the middle of the lower end of the upper mold, the limiting plate is slidably connected to the inside of the mold core, and a lifting spring is installed on the outer side of the pressure rod between the limiting plate and the inner top wall of the mold core. That is, the mold core is suspended from the lower end of the upper mold by the pressure rod, and the lifting is achieved by the limiting relationship between the limiting plate and its interior or by the elastic force of the lifting spring.

[0009] Furthermore, anti-detachment rods are fixedly connected to the internal components of the linkage frame at the lower side of the abutment plate to prevent structural conflicts between the abutment plate and wedge one or wedge two during changes in state, thus ensuring the stability of the structure.

[0010] Furthermore, a casting port is provided at the front end of the lower mold, and a hydraulic cylinder is fixedly installed at the middle of the upper end of the casting frame. The lower telescopic end of the hydraulic cylinder is fixedly connected to the upper mold. The casting port is used to cooperate with the injection punch to inject the molten metal in the pressure chamber into the cavity, and provides high pressure power through the injection punch and other structures to ensure complete filling of the molten metal.

[0011] The advantages of this utility model are as follows:

[0012] 1. This device can achieve one-time forming of the upper and lower oil ports of the cylinder during the casting process. Specifically, by using the ingenious cooperation between the telescopic push rod and the oil port groove, the cylinder oil port that meets the design requirements is directly cast when molten iron or alloy water is injected into the mold cavity for cooling and forming. This design avoids the need for post-processing of the oil port in the traditional process, reduces processing steps and production costs, and helps to improve the dimensional accuracy and surface quality of the oil port, making the overall performance of the cylinder more stable.

[0013] 2. When the casting is completed and the mold is separated, the cylinder can be raised together with the upper mold by means of the linkage between the components during the upward movement of the upper mold, as well as the locking action of the lifting spring, push rod and oil port of the cylinder casting, to achieve initial separation. After that, by pulling the cylinder down, the push rod can be smoothly disengaged from the oil port of the cylinder by means of the further linkage of the components in the device, so that the cylinder can be removed relatively easily and the action is smooth. This design simplifies the operation process of mold separation and part removal, improves production efficiency, and has a simple and ingenious structure compared with some equipment with ejection function, reducing the cost of use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the upper and lower mold structure of this utility model;

[0016] Figure 3 This is a partial cross-sectional view of the present invention.

[0017] Figure 4 This is a cross-sectional structural diagram of the mold core of this utility model.

[0018] In the diagram: 1. Casting frame; 2. Lower mold; 3. Upper mold; 4. Cavity; 5. Mold core; 6. Fixed push plate; 7. Moving push plate; 8. Limiting T-seat; 9. Tension spring; 10. Push rod; 11. Oil port groove; 12. Support plate; 13. Pressure rod; 14. Limiting plate; 15. Wedge head one; 16. Linkage frame; 17. Wedge head two; 18. Anti-detachment rod; 19. Casting port; 20. Hydraulic cylinder; 21. Lifting spring. Detailed Implementation

[0019] 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.

[0020] Please see Figures 1-4A hydraulic cylinder casting device includes a casting frame 1, a lower mold 2, and an upper mold 3. A cavity 4 is provided at the middle of the upper end of the lower mold 2. A matching mold core 5 is placed inside the cavity 4. A fixed push plate 6 is fixedly connected to the inner right wall of the mold core 5, and a movable push plate 7 is installed on the inner left wall of the mold core 5. A limit T-seat 8 is fixedly connected between the fixed push plate 6 and the movable push plate 7 at the middle. A tension spring 9 is installed between the limit T-seats 8. A stop plate 12 is rotatably installed on the left end of the fixed push plate 6 near both the upper and lower sides. A pressure rod 13 passes through the middle of the upper end of the mold core 5. A limit plate 14 is provided at the lower end of the pressure rod 13, and a wedge head is fixedly connected to the lower end of the limit plate 14. A linkage frame 16 is fixedly connected to the middle of the front and rear ends of wedge 15. A second wedge 17 is fixedly installed inside the linkage frame 16 near the lower side. Wedge 15 and wedge 17 are respectively pressed against the abutment plate 12. The lower mold 2 is installed at the middle of the upper end of the worktable of the casting frame 1. The upper mold 3 is slidably installed on the upper side of the upper and lower molds 2 of the casting frame 1. A casting opening 19 is provided at the front end of the lower mold 2. A hydraulic cylinder 20 is fixedly installed at the middle of the upper end of the casting frame 1. The lower telescopic end of the hydraulic cylinder 20 is fixedly connected to the upper mold 3. By opening the hydraulic cylinder 20, its telescopic end drives the upper mold 3 to descend, allowing the mold core 5 to enter the lower mold 2. As the upper mold 3 continues to descend until it fits against the lower mold 2 within the upper cavity 4, the mold core 5, under the influence of gravity, first abuts against the bottom of the cavity 4. The pressure rod 13, driven by the upper mold 3, continues to descend, causing the first wedge 15 to descend. The descent of the first wedge 15 synchronously drives the linkage frame 16 to descend the second wedge 17. As the first and second wedges 15 and 17 descend against the upper and lower abutment plates 12, the left end of the abutment plate 12 abuts against the movable push plate 7, causing it to move to the left. When the upper mold 3 and lower mold 2 fit together, the movable push plate 7 drives the push rod 10 to move to the left, precisely abutting against the oil outlet groove 11. The mold core 5 is pressed against the bottom of the cavity 4. Molten iron or molten metal used to make the cylinder barrel is injected into the cavity 4 through the casting port 19. Finally, the casting formed by cooling between the cavity 4 and the mold core 5 is the cylinder barrel assembly of the hydraulic cylinder to be produced. Compared with the traditional sand casting method, this device can improve the quality of the cylinder barrel, reduce internal defects, and has advantages in sealing, wear resistance and precision. It is suitable for mass production. At the same time, compared with some current casting devices, this device can directly cast the upper and lower oil ports of the cylinder barrel through the design of the telescopic push rod 10 and the cooperation of the oil port groove 11, avoiding post-processing and greatly improving production efficiency.

[0021] Please see Figures 2-4Push rods 10 are fixedly connected to the left end of the moving push plate 7 near both the upper and lower sides. Oil outlet grooves 11 are provided on both the upper and lower sides of the left end of the cavity 4. The left end of the push rod 10 penetrates the cavity 4 and abuts into the inside of the oil outlet groove 11. The oil outlet groove 11 and the push rod 10 fit together. The upper end of the pressure rod 13 is fixedly connected to the middle of the lower end of the upper mold 3. The limiting plate 14 is slidably connected to the inside of the mold core 5. The outer side of the pressure rod 13 is on the inner top wall of the limiting plate 14 and the mold core 5. A lifting spring 21 is installed between them. Anti-detachment rods 18 are fixedly connected to the lower side of the abutment plate 12 within the linkage frame 16. Furthermore, when the upper mold 3 drives the pressure rod 13 and other structures to rise, the pressure of the wedge head 15 and wedge head 17 on the abutment plate 12 is released. The tension spring 9's return and contraction can cause the push plate 7 to retract the push rod 10. When the left end of the push rod 10 moves out of the oil port groove 11, the lifting spring 21... The compressed elastic force is greater than the weight of the mold core 5 and the cylinder casting, so when the upper mold 3 drives the pressure rod 13 and other structures to continue to rise, the cylinder casting can be driven to rise together through the locking action of the push rod 10 with the oil port of the cylinder casting, thus achieving the purpose of directly removing the casting. When it rises to a certain height and is completely separated, the lifting spring 21 is further compressed by pulling the cylinder casting downward, and the limiting plate 14 continues to slide upward, causing it to drive the first wedge 15 and the second wedge 17 to move further upward to release the limiting effect on the stop plate 12. Thus, the moving push plate 7 can move further to the right under the action of the tension spring 9, causing the push rod 10 to disengage from the oil port of the cylinder casting. When the limiting T seats 8 abut against each other, the push rod 10 just retracts into the through hole on the mold core 5, so that the cylinder can be directly removed downward during the downward driving process. The structure is ingenious, the use is flexible, and the efficiency of the cylinder in the casting process is improved.

[0022] Working principle: During use, opening the hydraulic cylinder 20 causes its telescopic end to lower the upper mold 3, allowing the mold core 5 to enter the cavity 4 on the lower mold 2. As the upper mold 3 continues to descend until it fits against the lower mold 2, the mold core 5 will first abut against the bottom of the cavity 4 under the action of gravity. The pressure rod 13 will continue to descend under the action of the upper mold 3, thereby driving the first wedge 15 to descend. The descent of the first wedge 15 can simultaneously drive the linkage frame 16 to lower the second wedge 17. When the first wedge 15 and the second wedge 17 descend against the upper and lower abutment plates 12, the left side of the abutment plate 12 will... The upper mold 3 is pressed against the movable push plate 7, causing it to move to the left. When the upper mold 3 and the lower mold 2 are in contact, the movable push plate 7 will drive the push rod 10 to move to the left, just enough to abut against the oil port groove 11. At the same time, the mold core 5 is pressed against the inner bottom of the cavity 4. Molten iron or liquid metal for making the cylinder barrel is injected into the cavity 4 through the casting port 19. Finally, the casting formed between the cavity 4 and the mold core 5 is the cast cylinder barrel assembly of the hydraulic cylinder. This device can directly cast the upper and lower oil ports of the cylinder barrel by means of the design of the telescopic push rod 10 and its cooperation with the oil port groove 11. Furthermore, by causing the upper mold 3 to drive the pressure rod 10, the cylinder barrel assembly can be directly cast. When the structure rises, the pressure of wedges 15 and 17 on the abutment plate 12 is released. The retraction of the tension spring 9 allows the push plate 7 to retract the push rod 10. When the left end of the push rod 10 moves out of the oil port groove 11, the compressed spring force of the lifting spring 21 is greater than the weight of the mold core 5 and the cylinder casting. Therefore, as the upper mold 3 drives the pressure rod 13 and other structures to continue rising, the push rod 10 can engage with the oil port of the cylinder casting, causing the cylinder casting to rise together. This achieves the purpose of directly removing the casting. After rising to a certain height... During bottom separation, the lifting spring 21 is further compressed by pulling the cylinder casting downward, and the mold core 5 is driven downward. Meanwhile, the limiting plate 14 continues to slide upward relative to the mold core 5, thereby causing the first wedge 15 and the second wedge 17 to move further upward to release the limiting effect on the abutment plate 12. This allows the moving push plate 7 to move further to the right under the action of the tension spring 9, causing the push rod 10 to disengage from the oil port of the cylinder casting. When the limiting T seats 8 abut against each other, the push rod 10 just retracts into the through hole on the mold core 5. Thus, the cylinder can be directly removed downward during the downward driving process, and the operation is smooth.

Claims

1. A hydraulic cylinder casting device, comprising a casting frame (1), a lower mold (2), and an upper mold (3), characterized in that: A cavity (4) is provided at the middle of the upper end of the lower mold (2). A matching mold core (5) is placed inside the cavity (4). A fixed ejector plate (6) is fixedly connected to the inner right wall of the mold core (5). A movable ejector plate (7) is installed on the inner left wall of the mold core (5). A limit T-seat (8) is fixedly connected between the fixed ejector plate (6) and the movable ejector plate (7) at the middle. A tension spring (9) is installed between the limit T-seats (8). The left end of the fixed ejector plate (6) is rotatably mounted near the upper and lower sides. There is a stop plate (12), and a pressure rod (13) runs through the middle of the upper end of the mold core (5). A limit plate (14) is provided at the lower end of the pressure rod (13). A wedge head (15) is fixedly connected to the lower end of the limit plate (14). A linkage frame (16) is fixedly connected to the middle of the front and rear ends of the wedge head (15). A wedge head (17) is fixedly installed inside the linkage frame (16) near the lower side. The wedge head (15) and the wedge head (17) are respectively pressed against the stop plate (12).

2. The hydraulic cylinder casting device according to claim 1, characterized in that: The lower mold (2) is installed at the middle of the upper end of the workbench of the casting frame (1), and the upper mold (3) is slidably installed on the upper side of the upper and lower molds (2) of the casting frame (1).

3. The hydraulic cylinder casting device according to claim 1, characterized in that: The left end of the moving push plate (7) is fixedly connected with push rods (10) near the upper and lower sides. The left end of the cavity (4) is provided with oil outlet grooves (11) at the upper and lower sides. The left end of the push rod (10) penetrates the cavity (4) and abuts into the inside of the oil outlet groove (11). The oil outlet groove (11) and the push rod (10) are in harmony.

4. The hydraulic cylinder casting device according to claim 1, characterized in that: The upper end of the pressure rod (13) is fixedly connected to the middle of the lower end of the upper mold (3), the limiting plate (14) is slidably connected to the inside of the mold core (5), and a lifting spring (21) is installed on the outer side of the pressure rod (13) between the limiting plate (14) and the inner top wall of the mold core (5).

5. A hydraulic cylinder casting device according to claim 1, characterized in that: Anti-detachment rods (18) are fixedly connected to the interior of the linkage frame (16) at the lower side of the abutment plate (12).

6. A hydraulic cylinder casting device according to claim 1, characterized in that: The lower mold (2) has a casting port (19) at the front end. A hydraulic cylinder (20) is fixedly installed at the middle of the upper end of the casting frame (1). The lower telescopic end of the hydraulic cylinder (20) is fixedly connected to the upper mold (3).

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