A lost foam casting apparatus for automotive drive axle housings

Abstract

This utility model relates to the field of lost foam casting technology and discloses a lost foam casting device for automotive drive axle housings. It includes a base, a frame mounted above the base, a casting box fixedly connected to the inner wall of the frame, a sand outlet on the lower surface of the casting box, a recovery assembly below the sand outlet, and a filter assembly outside the base. The recovery assembly includes a baffle, a collection box, and a sieve plate. A first hinge seat is fixedly connected to the outer wall of the frame, and a second hinge seat is fixedly connected to the outer wall of the baffle. A hydraulic rod is rotatably connected to the inner wall of the first hinge seat, and the output end of the hydraulic rod is rotatably connected to the inner wall of the second hinge seat. In this utility model, after casting is completed, the baffle is opened and closed automatically via a hydraulic drive device, achieving automatic opening and closing of the sand outlet. The molding sand falls into the collection box through the sieve plate for initial screening. Coarse sand is directly recycled, while fine sand is separated through the sieve plate, improving the efficiency of old sand recycling and reducing labor intensity.

Description

Technical Field

[0001] This utility model relates to the field of lost foam casting technology, and in particular to a lost foam casting device for automotive drive axle housings. Background Technology

[0002] As a key load-bearing component of heavy vehicles, the casting quality of the automotive drive axle housing directly affects the safety performance of the entire vehicle. Due to its advantages such as high precision and great design freedom, lost foam casting technology has gradually become the preferred process for forming complex axle housing structures. Among them, the dry sand filling and recycling process has a decisive impact on the casting quality and production cost.

[0003] After casting is completed, the high-temperature molding sand needs to be manually transported to the ground or transport vehicle. Then, the sand is separated by an external vibrating screen. This process relies on manual transport of the sand to an independent screening station. The usable sand after screening needs to be transported to the casting system a second time.

[0004] Existing sand recycling methods require manual dumping of high-temperature molding sand, which is inefficient and dangerous. The multi-stage transfer process extends the recycling cycle of old sand, and the usable sand after separation cannot be reused in the casting system in real time. This not only increases labor costs but also restricts the continuous production needs of automotive axle housings. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a lost foam casting device for automotive drive axle housings, aiming to improve the problem of inconvenient sand recycling.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a lost foam casting device for automotive drive axle housing, comprising a foot, a sliding rod slidably connected to the inner wall of the foot, a frame slidably connected to the outer wall of the sliding rod, a casting box fixedly connected to the inner wall of the frame, a sand outlet provided on the lower surface of the casting box, a recovery component provided below the sand outlet, and an air filter component provided on the outside of the foot.

[0007] The recycling assembly includes a baffle, a collection box, and a sieve plate. The collection box is located below the sand outlet, and the sieve plate is located inside the collection box. One end of the baffle is rotatably connected to the lower surface of the sand outlet. A hinge seat one is fixedly connected to the outer wall of the frame, and a hinge seat two is fixedly connected to the outer wall of the baffle. A hydraulic rod is rotatably connected to the inner wall of the hinge seat one, and the output end of the hydraulic rod is rotatably connected to the inner wall of the hinge seat two.

[0008] Furthermore, the air filtration assembly includes a filter screen and a fan. An air filtration box is provided outside the base. The outer wall of the filter screen is slidably connected to the inner wall of the air filtration box. The fan is located inside the air filtration box. An air inlet is fixedly connected to the upper surface of the air filtration box. A top cover is provided above the casting box. An air outlet is fixedly connected to the upper surface of the top cover. The air outlet and the air inlet are connected by an air pipe. One end of the air pipe is fixedly connected to the air inlet of the fan.

[0009] Furthermore, a locking block is fixedly connected to the outer wall of the filter screen, and a slider is slidably connected to the inner wall of the air filter box, with the locking block and the slider engaging.

[0010] Furthermore, a pull rod is fixedly connected to the outer wall of the slider, and the pull rod is disposed on the outer wall of the air filter box.

[0011] Furthermore, a second spring is sleeved on the outer wall of the pull rod, one end of the second spring is fixedly connected to the outer wall of the slider, and the other end of the second spring is fixedly connected to the inner wall of the air filter box.

[0012] Furthermore, a handle is fixedly connected to the upper surface of the cover, and a pouring port is fixedly connected to the upper surface of the cover.

[0013] Furthermore, a spring is sleeved on the outer wall of the slide rod, and a vibration pump is fixedly connected to the outer wall of the casting box.

[0014] Furthermore, one end of the spring is fixedly connected to the upper surface of the foot, and the other end of the spring is fixedly connected to the lower surface of the frame.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, the opening and closing of the baffle is controlled by a hydraulic drive device during operation, so as to realize the automatic opening and closing of the sand outlet. After casting is completed, the baffle rotates downward to open, and the molding sand falls into the collection box through the screen plate to complete the initial screening. The process does not require manual intervention. The coarse sand is directly recycled and reused, and the fine sand is separated and processed through the screen plate, which improves the efficiency of old sand recycling and reduces labor intensity.

[0017] 2. In this utility model, during the casting process, the blower draws the gas in the casting box into the filter box through a sealed air pipe. The multi-layer filter screen performs graded filtration of the high-temperature dust-laden gas. The filter screen adopts a spring snap-fit ​​structure, which can be quickly disassembled and replaced by pulling the external pull rod, ensuring the continuous and efficient operation of the filtration system, effectively solving the problem of casting flue gas pollution and reducing equipment maintenance downtime. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of a lost foam casting device for an automobile drive axle housing proposed in this utility model.

[0019] Figure 2This is a schematic diagram of the baffle structure of a lost foam casting device for an automobile drive axle housing proposed in this utility model.

[0020] Figure 3 This is a schematic diagram of the collection box structure of a lost foam casting device for an automobile drive axle housing proposed in this utility model;

[0021] Figure 4 This is a schematic diagram of the air filter box structure of a lost foam casting device for an automobile drive axle housing proposed in this utility model.

[0022] Figure 5 for Figure 4 Enlarged diagram of point A in the middle.

[0023] Legend:

[0024] 1. Foot; 2. Slide rod; 3. Spring 1; 4. Frame; 5. Casting box; 6. Sand outlet; 7. Vibration pump; 8. Top cover; 9. Hinge seat 1; 10. Hydraulic rod; 11. Hinge seat 2; 12. Baffle; 13. Collection box; 14. Screen plate; 15. Air filter box; 16. Filter screen; 17. Handle; 18. Pour port; 19. Air outlet; 20. Air inlet; 21. Air pipe; 22. Locking block; 23. Sliding block; 24. Pull rod; 25. Spring 2; 26. Fan. Detailed Implementation

[0025] 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.

[0026] Reference Figures 1-5This utility model provides an embodiment of a lost foam casting device for automotive drive axle housings, including a base 1. A sliding rod 2 is slidably connected to the inner wall of the base 1, which buffers the vibration of the casting box 5 through sliding engagement, reducing impact damage to the equipment. A frame 4 is slidably connected to the outer wall of the sliding rod 2, and the casting box 5 is fixedly connected to the inner wall of the frame 4. A sand outlet 6 is provided on the lower surface of the casting box 5 to discharge molding sand. A recovery component is provided below the sand outlet 6 to realize automatic screening and recovery of sand. An air filter component is provided outside the base 1. The recovery component includes a baffle 12, a collection box 13, and a screen plate 14. The collection box 13 is located below the sand outlet 6, bearing... To prevent dust from being generated by the falling molding sand, a screen plate 14 is installed inside the collection box 13 to achieve real-time separation and reuse of coarse sand. One end of a baffle 12 is rotatably connected to the lower surface of the sand outlet 6, sealing or opening the sand discharge channel through rotation. A hinge seat 9 is fixedly connected to the outer wall of the frame 4, and a second hinge seat 11 is fixedly connected to the outer wall of the baffle 12. A hydraulic rod 10 is rotatably connected to the inner wall of the first hinge seat 9, driving the baffle 12 to open and close automatically. The output end of the hydraulic rod 10 is rotatably connected to the inner wall of the second hinge seat 11. The air filtration assembly includes a filter screen 16 and a fan 26. An air filtration box 15 is installed outside the foot 1, and the outer wall of the filter screen 16 is slidably connected to the inner wall of the air filtration box 15 for processing. For casting fumes, a blower 26 is installed inside a filter box 15 to provide negative pressure for drawing in the fumes. An air inlet 20 is fixedly connected to the upper surface of the filter box 15. A top cover 8 is installed above the casting box 5, and an air outlet 19 is fixedly connected to its upper surface. The air outlet 19 and the air inlet 20 are connected via an air pipe 21, one end of which is fixedly connected to the air inlet of the blower 26. A locking block 22 is fixedly connected to the outer wall of the filter screen 16, and a slider 23 is slidably connected to the inner wall of the filter box 15. The slider 23 cooperates with the locking block 22 to fix the filter screen 16. The locking block 22 and the slider 23 are engaged. A pull rod 24 is fixedly connected to the outer wall of the slider 23 and is located within the filter box. The outer wall of the pull rod 24 is fitted with a spring 25 to provide the automatic reset force for the slider 23. One end of the spring 25 is fixedly connected to the outer wall of the slider 23, and the other end of the spring 25 is fixedly connected to the inner wall of the air filter box 15. A handle 17 is fixedly connected to the upper surface of the cover 8, and a pouring port 18 is fixedly connected to the upper surface of the cover 8 to facilitate precise pouring of molten metal. The outer wall of the slide rod 2 is fitted with a spring 3. A vibration pump 7 is fixedly connected to the outer wall of the casting box 5 to provide the mechanical vibration force required for the compaction of molding sand. One end of the spring 3 is fixedly connected to the upper surface of the foot 1, and the other end of the spring 3 is fixedly connected to the lower surface of the frame 4 to form a suspended shock absorption system.

[0027] Working principle: When using this type of lost foam casting device for automotive drive axle housings, first open the top cover 8 via handle 17, place the foam model in the casting box 5 and fill it with molding sand. After closing the cover, pour the molten metal through the pouring port 18. Simultaneously, start the vibration pump 7 to drive the casting box 5 to vibrate. Spring 3 provides buffering and shock absorption through the sliding connection between the slide rod 2, the foot 1, and the frame 4, ensuring that the molding sand is uniform and compact. During the casting process, the blower 26 blows the high-temperature flue gas in the casting box 5 through the air pipe 21 through the air outlet 19 and the air inlet 20. The gas is drawn into the filter box 15, where multi-layer filter screens 16 filter the dust-laden gas in stages. The filtered clean gas is then discharged. The filter screens 16 are fixed by the engagement of the clip 22 and the slider 23. When maintenance is required, the pull rod 24 is pulled outward to compress the spring 25 to unlock and disassemble the gas. After the casting is completed, the hydraulic rod 10 connected to the hinge seat 9 pushes the hinge seat 11 to make the baffle 12 rotate downward around the sand outlet 6 and open. The molding sand falls into the collection box 13 and is automatically screened by the screen plate 14. The coarse sand is retained above the screen plate 14 and reused directly, while the fine sand falls to the bottom of the box for centralized treatment.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lost foam casting apparatus for an automobile drive axle housing, comprising a base (1), characterized in that: The inner wall of the foot (1) is slidably connected to a slide rod (2), the outer wall of the slide rod (2) is slidably connected to a frame (4), the inner wall of the frame (4) is fixedly connected to a casting box (5), the lower surface of the casting box (5) is provided with a sand outlet (6), a recycling component is provided below the sand outlet (6), and an air filter component is provided on the outside of the foot (1). The recycling assembly includes a baffle (12), a collection box (13), and a sieve plate (14). The collection box (13) is located below the sand outlet (6), and the sieve plate (14) is located inside the collection box (13). One end of the baffle (12) is rotatably connected to the lower surface of the sand outlet (6). A hinge seat one (9) is fixedly connected to the outer wall of the frame (4), and a hinge seat two (11) is fixedly connected to the outer wall of the baffle (12). A hydraulic rod (10) is rotatably connected to the inner wall of the hinge seat one (9), and the output end of the hydraulic rod (10) is rotatably connected to the inner wall of the hinge seat two (11).

2. The apparatus for lost foam casting of an automotive drive cast axle housing according to claim 1, wherein: The air filtration assembly includes a filter screen (16) and a fan (26). An air filtration box (15) is provided outside the base (1). The outer wall of the filter screen (16) is slidably connected to the inner wall of the air filtration box (15). The fan (26) is located inside the air filtration box (15). An air inlet (20) is fixedly connected to the upper surface of the air filtration box (15). An upper cover (8) is provided above the casting box (5). An air outlet (19) is fixedly connected to the upper surface of the upper cover (8). The air outlet (19) and the air inlet (20) are connected through an air pipe (21). One end of the air pipe (21) is fixedly connected to the air inlet of the fan (26).

3. The apparatus for lost foam casting of an automotive drive cast axle housing according to claim 2, wherein: The outer wall of the filter screen (16) is fixedly connected to a locking block (22), and the inner wall of the air filter box (15) is slidably connected to a slider (23). The locking block (22) and the slider (23) are engaged and connected.

4. The apparatus for lost foam casting of an automotive drive cast axle housing according to claim 3, wherein: A pull rod (24) is fixedly connected to the outer wall of the slider (23), and the pull rod (24) is set on the outer wall of the air filter box (15).

5. The apparatus for lost foam casting of an automotive drive cast axle housing according to claim 4, wherein: The outer wall of the pull rod (24) is fitted with a second spring (25). One end of the second spring (25) is fixedly connected to the outer wall of the slider (23), and the other end of the second spring (25) is fixedly connected to the inner wall of the air filter box (15).

6. A lost foam casting device for a cast axle of an automobile drive bridge according to claim 2, characterized in that: A handle (17) is fixedly connected to the upper surface of the cover (8), and a pouring port (18) is fixedly connected to the upper surface of the cover (8).

7. The apparatus according to claim 1, wherein: The outer wall of the slide bar (2) is fitted with a spring (3), and the outer wall of the casting box (5) is fixedly connected with a vibration pump (7).

8. The apparatus according to claim 7, wherein: One end of the spring (3) is fixedly connected to the upper surface of the foot (1), and the other end of the spring (3) is fixedly connected to the lower surface of the frame (4).

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