Ductile iron evanescent mode casting of generator spindle

Abstract

The utility model relates to the technical field of evanescent mode casting, and discloses a ductile iron evanescent mode casting of a generator main shaft, which comprises a U-shaped plate, the left end and the right end of the U-shaped plate are fixedly connected with fixed shafts, the opposite ends of the fixed shafts are jointly and rotationally connected with an injection molding box, and a partition plate is arranged in the injection molding box. A containing groove is formed in the upper side of the partition plate, an evanescent mode body is arranged in the containing groove, pull rods convenient to take out are fixedly connected to the inner sides of the left end and the right end of the partition plate correspondingly, and cover plates are installed on the upper side and the lower side of the injection molding box correspondingly. According to the injection molding device, the injection molding box can be divided into an upper part and a lower part through the arranged partition plate, after the upper half part is filled with quartz sand, the injection molding box is rotated by 180 degrees by rotating the injection molding box, the partition plate is taken out, and the lower half part is filled, so that the injection molding device is convenient and simple, and the processing efficiency is improved; the U-shaped plate is pushed to rotate through the pushing rod, the angle is adjusted, and pouring is convenient.

Description

Technical Field

[0001] This utility model relates to the field of lost foam casting technology, and in particular to a ductile iron lost foam casting for a generator main shaft. Background Technology

[0002] The generator spindle is a critical load-bearing component of a generator set, requiring high strength, high toughness, good wear resistance, and fatigue resistance. Traditionally, spindles are manufactured using forged steel or ordinary cast iron. However, forged steel is costly and has a long processing cycle, while the mechanical properties of ordinary cast iron are insufficient to meet the requirements of high-power generators. Due to its superior comprehensive properties, ductile iron has gradually become an important material choice for generator spindles.

[0003] In the existing technology, the generator shaft has the following shortcomings when using lost foam casting: before casting, the lost foam needs to be buried in the quartz sand in two steps, and only half of the quartz sand can be filled at a time. Traditional filling mainly relies on manual reversal of the casting mold, which is prone to collision during the reversal process, resulting in disorder of the filled quartz sand and poor efficiency. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies by proposing a ductile iron lost foam casting for a generator main shaft, which can be rotated to facilitate mold flipping, improve processing efficiency, and enhance casting quality.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A ductile iron lost foam casting for a generator main shaft includes a U-shaped plate. Fixed shafts are fixedly connected to both ends of the U-shaped plate. An injection molding box is rotatably connected to the opposite end of each fixed shaft. A partition is provided inside the injection molding box, and a placement groove is provided on the upper side of the partition. A lost foam casting body is placed inside the placement groove. Pull rods for easy removal are fixedly connected to the inner sides of both ends of the partition. Cover plates are installed on the upper and lower sides of the injection molding box. A pin for fixing the lost foam casting body passes through the middle of the fixed shaft. A drive assembly for rotating the injection molding box is provided at the right end of the U-shaped plate.

[0007] Furthermore, the drive assembly includes a drive motor fixedly connected to the top right end of the U-shaped plate, and a gear is fixedly connected to the drive end of the drive motor.

[0008] Furthermore, a gear ring is fixedly connected to the right side of the injection molding box, and the outer side of the gear ring is engaged with the outer side of the gear.

[0009] Furthermore, slide rails are fixedly connected to the inner sides of both ends of the U-shaped plate, and pads that slide back and forth are provided on the outer sides of the slide rails.

[0010] Furthermore, a guide plate is fixedly connected to the lower rear end of the U-shaped plate.

[0011] Furthermore, a base is provided on the lower side of the U-shaped plate, the left end of the base is rotatably connected to the lower left end of the U-shaped plate, and support plates are fixedly connected to the lower sides of both the left and right ends of the base.

[0012] Furthermore, a limiting rod is fixedly connected to the inner side of the base, and a slider that can slide left and right is provided on the outside of the limiting rod. A push rod is rotatably connected to the upper side of the slider, and the right end of the push rod is rotatably connected to the lower right end of the U-shaped plate.

[0013] Furthermore, a mounting base is fixedly connected to the right end of the base, and an electric push rod is fixedly connected to the inner side of the mounting base. The drive end of the electric push rod is fixedly connected to the middle right side of the slider.

[0014] This utility model has the following beneficial effects:

[0015] 1. In this utility model, the injection molding box can be divided into upper and lower parts by setting a partition. After the upper part is filled with quartz sand, the injection molding box can be rotated 180 degrees to remove the partition and fill the lower part. This is convenient, simple and improves processing efficiency.

[0016] 2. In this utility model, the electric push rod drives the slider to move to the right, thereby pushing the U-shaped plate to rotate through the push rod, adjusting the angle, and pulling out the pin, which facilitates the pouring of metal solution and improves the quality of pouring. Attached Figure Description

[0017] Figure 1 This is an overall schematic diagram of a ductile iron lost foam casting for a generator main shaft proposed in this utility model;

[0018] Figure 2 This is a schematic diagram of the toothed ring of a ductile iron lost foam casting for a generator main shaft proposed in this utility model.

[0019] Figure 3 This is a schematic diagram of a partition plate for a ductile iron lost foam casting of a generator main shaft according to the present invention.

[0020] Figure 4 This is a schematic diagram of a pad for a lost foam casting of ductile iron for a generator main shaft, as proposed in this utility model.

[0021] Figure 5 This is a schematic diagram of the push rod of a ductile iron lost foam casting for a generator main shaft proposed in this utility model.

[0022] Legend:

[0023] 1. U-shaped plate; 2. Fixed shaft; 3. Injection box; 4. Partition plate; 5. Placement slot; 6. Lost foam body; 7. Tie rod; 8. Gear ring; 9. Drive motor; 10. Gear; 11. Cover plate; 12. Slide rail; 13. Pad plate; 14. Guide plate; 15. Pin; 16. Base; 17. Support plate; 18. Limiting rod; 19. Slider; 20. Push rod; 21. Mounting base; 22. Electric push rod. Detailed Implementation

[0024] 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.

[0025] Reference Figures 1-3 This utility model provides an embodiment of a ductile iron lost foam casting for a generator main shaft, comprising a U-shaped plate 1, with fixed shafts 2 fixedly connected to both ends of the U-shaped plate 1, and an injection molding box 3 rotatably connected to the opposite ends of the fixed shafts 2. The injection molding box 3 has a partition 4 inside, with a placement groove 5 on the upper side of the partition 4. A lost foam body 6 is placed inside the placement groove 5. Pull rods 7 for easy removal are fixedly connected to the inner sides of both ends of the partition 4. Covers are installed on both the upper and lower sides of the injection molding box 3. A pin 15 for fixing the lost foam body 6 is inserted through the middle of the plate 11 and the fixed shaft 2. A drive motor 9 is fixedly connected to the top right end of the U-shaped plate 1. A gear 10 is fixedly connected to the drive end of the drive motor 9. A gear ring 8 is fixedly connected to the right side of the injection box 3. The outer side of the gear ring 8 is meshed with the outer side of the gear 10. Slide rails 12 are fixedly connected to the inner sides of both the left and right ends of the U-shaped plate 1. A back-and-forth sliding pad 13 is provided on the outer side of the slide rail 12. A guide plate 14 is fixedly connected to the lower rear end of the U-shaped plate 1.

[0026] Open the cover plate 11 on the upper side of the injection molding box 3, install the partition plate 4 with the placement groove 5 into the injection molding box 3, accurately position the lost foam body 6 in the placement groove 5 of the partition plate 4, insert the pin 15 through the fixed shaft 2 and fix both ends of the lost foam body 6, fill the injection molding box 3 with the first quartz sand, covering the upper half of the lost foam body 6, push the pad plate 13 to the bottom of the injection molding box 3 to enhance the support stability, close the upper cover plate 11, remove the pad plate 13 to release the bottom limit, drive the motor 9 to mesh with the gear ring 8 through the gear 10, drive the injection molding box 3 to rotate 180°, so that the partition plate 4 is rotated to the top, open the cover plate 11, use the pull rod 7 to remove the partition plate 4, expose the other half of the lost foam, and perform the second quartz sand filling, ensure that the mold cavity is completely dense, close the cover plate 11, reduce the difficulty of quartz sand filling, and improve the processing efficiency.

[0027] Reference Figures 1-3 A base 16 is provided on the lower side of the U-shaped plate 1. The left end of the base 16 is rotatably connected to the lower left side of the U-shaped plate 1. Support plates 17 are fixedly connected to the lower sides of both the left and right ends of the base 16. A limit rod 18 is fixedly connected to the inner side of the base 16. A slider 19 that slides left and right is provided on the outer side of the limit rod 18. A push rod 20 is rotatably connected to the upper side of the slider 19. The right end of the push rod 20 is rotatably connected to the lower right side of the U-shaped plate 1. A mounting base 21 is fixedly connected to the right end of the base 16. An electric push rod 22 is fixedly connected to the inner side of the mounting base 21. The drive end of the electric push rod 22 is fixedly connected to the middle right side of the slider 19.

[0028] Pull out the pin 15 at the right end of the U-shaped plate 1, start the electric push rod 22 to drive the slider 19 to move to the right, and push the U-shaped plate 1 through the push rod 20 to make its right end tilt up. The casting equipment injects the metal solution into the injection box 3 through the fixed shaft 2, and then waits for it to cool. The angle can be adjusted as needed to facilitate the injection of the metal solution and make the casting more complete.

[0029] Working principle: Open the cover plate 11 on the upper side of the injection molding box 3, place the partition plate 4 inside the injection molding box 3, and place the lost foam body 6 in the placement groove 5. Then, insert the pin 15 into the fixing shaft 2 at both ends of the U-shaped plate 1, so that its end is inserted into the left and right ends of the lost foam body 6. Then, fill the injection molding box 3 with quartz sand for the first time. During filling, push the pad plate 13 to place it at the bottom of the injection molding box 3 to improve stability. After filling, close the upper cover plate 11, pull 13 forward, and start the set drive motor 9 to drive the gear 1. The gear 10 rotates 180 degrees, and the gear ring 8 rotates in conjunction with the gear 10 to drive the injection box 3 to rotate 180 degrees, so that the partition 4 moves to the top. The cover 11 is opened, and the partition 4 is taken out of the injection box 3 by the pull rod 7. Then, the quartz sand is filled for the second time. After the filling is completed, the cover 11 is closed, the pin 15 at the right end of the U-shaped plate 1 is pulled out, the electric push rod 22 is started to drive the slider 19 to move to the right, and the push rod 20 pushes the U-shaped plate 1, so that its right end is raised. The casting equipment injects molten metal into the injection box 3 through the fixed shaft 2, and then waits for cooling.

[0030] 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 ductile iron lost foam casting for a generator main shaft, characterized in that, The device includes a U-shaped plate (1), with fixed shafts (2) fixedly connected to both the left and right ends of the U-shaped plate (1). An injection molding box (3) is rotatably connected to the opposite end of the fixed shafts (2). A partition (4) is provided inside the injection molding box (3). A placement groove (5) is provided on the upper side of the partition (4). A lost foam body (6) is provided inside the placement groove (5). Pull rods (7) for easy removal are fixedly connected to the inner sides of both the left and right ends of the partition (4). Cover plates (11) are installed on both the upper and lower sides of the injection molding box (3). A pin (15) for fixing the lost foam body (6) is passed through the middle of the fixed shaft (2). A drive assembly for rotating the injection molding box (3) is provided on the right end of the U-shaped plate (1).

2. The ductile iron lost foam casting for a generator main shaft according to claim 1, characterized in that: The drive assembly includes a drive motor (9) fixedly connected to the top right end of the U-shaped plate (1), and a gear (10) is fixedly connected to the drive end of the drive motor (9).

3. The ductile iron lost foam casting for a generator main shaft according to claim 1, characterized in that: A toothed ring (8) is fixedly connected to the right side of the injection molding box (3), and the outer side of the toothed ring (8) is meshed with the outer side of the gear (10).

4. The ductile iron lost foam casting for a generator main shaft according to claim 1, characterized in that: The inner sides of both ends of the U-shaped plate (1) are fixedly connected with slide rails (12), and the outer side of the slide rails (12) is provided with pads (13) that slide back and forth.

5. The ductile iron lost foam casting for a generator main shaft according to claim 4, characterized in that: A guide plate (14) is fixedly connected to the lower rear end of the U-shaped plate (1).

6. The ductile iron lost foam casting for a generator main shaft according to claim 1, characterized in that: A base (16) is provided on the lower side of the U-shaped plate (1). The left end of the base (16) is rotatably connected to the lower left end of the U-shaped plate (1). Support plates (17) are fixedly connected to the lower left and right ends of the base (16).

7. A ductile iron lost foam casting for a generator main shaft according to claim 6, characterized in that: A limiting rod (18) is fixedly connected to the inner side of the base (16). A slider (19) that can slide left and right is provided on the outside of the limiting rod (18). A push rod (20) is rotatably connected to the upper side of the slider (19). The right end of the push rod (20) is rotatably connected to the lower right end of the U-shaped plate (1).

8. The ductile iron lost foam casting for a generator main shaft according to claim 7, characterized in that: The right end of the base (16) is fixedly connected to the mounting base (21), and the inner side of the mounting base (21) is fixedly connected to the electric push rod (22). The driving end of the electric push rod (22) is fixedly connected to the middle right side of the slider (19).

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