A fixed-point air cooling device for low-pressure pouring knuckle riser

Abstract

The utility model discloses belong to low pressure pouring air cooling technical field, specifically disclose a kind of for low pressure pouring knuckle riser's fixed-point air cooling device, including air pipe and mould lower mould, the mould lower mould include casting cavity, lower riser and feed pipe;The lower end of the casting cavity is linked with lower riser, and the lower end of lower riser is linked with feed pipe;The air pipe includes air inlet pipe, annular pipe and air outlet pipe;The air inlet pipe one end is linked with air pump, and the other end of air inlet pipe is linked with annular pipe;The air outlet pipe is evenly distributed on annular pipe, and the lower end of air outlet pipe is linked with annular pipe, and the upper end of air outlet pipe is open, and the open end of air outlet pipe is located in the recess of mould lower mould lower end surface;The air cooling device only needs to slightly improve mould to be realized, without additional cost input;The air cooling device can guarantee the cooling effect at the riser of casting, and also will not excessively reduce surrounding mould temperature, to effectively improve the shrinkage, cold separation and other defects generated in casting internal.

Description

Technical Field

[0001] This utility model belongs to the field of low-pressure casting air-cooling technology, specifically relating to a fixed-point air-cooling device for a low-pressure casting steering knuckle riser. Background Technology

[0002] The steering knuckle is one of the key components of a car's steering axle. Its function is to transmit and bear the load of the front of the car, support and drive the front wheels to rotate around the kingpin, thereby enabling the car to steer. The steering knuckle is also known as the "steering knuckle" because it enables the car to drive smoothly and transmit driving direction sensitively. Therefore, the steering knuckle plays an extremely important role and requires high strength.

[0003] With the continuous development of the automotive industry, the application of lightweight aluminum steering knuckles will become increasingly widespread. Most aluminum alloy steering knuckles are produced using low-pressure casting. During the production process, a ring of water cooling is commonly used at the riser position of the lower mold. While this cooling method provides good cooling for the riser, the mold itself is also cooled, resulting in a lower temperature. When producing the final part, the casting often develops internal defects such as shrinkage porosity and cold shuts due to the excessively low temperature of the lower mold riser. Once a steering knuckle with shrinkage porosity or cold shuts is installed in a vehicle, it will pose a significant threat to driving safety. Therefore, the choice of cooling method at the riser directly affects the internal shrinkage porosity of the steering knuckle. Utility Model Content

[0004] To address the problems existing in the background technology, this utility model provides a fixed-point air-cooling device for the riser of a low-pressure casting steering knuckle.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a fixed-point air-cooling device for a riser in a low-pressure casting steering knuckle, comprising an air duct and a lower mold, wherein the lower mold comprises a casting cavity, a lower riser and a feed pipe; the lower end of the casting cavity is connected to the lower riser, and the lower end of the lower riser is connected to the feed pipe; The air duct includes an air inlet pipe, an annular pipe, and an air outlet pipe; one end of the air inlet pipe is connected to the air outlet of the air pump, and the other end of the air inlet pipe is connected to the annular pipe; the annular pipe is located below the lower riser, and the air outlet pipes are evenly distributed on the annular pipe, with the lower end of the air outlet pipe connected to the annular pipe and the upper end of the air outlet pipe open, with the open end of the air outlet pipe located in the groove on the lower end face of the mold.

[0006] The inner diameter of the annular tube is larger than the outer diameter of the feed tube.

[0007] The groove is a circular countersunk hole, and the bottom of the groove is an arc-shaped groove. The inner diameter of the groove is larger than the outer diameter of the air outlet pipe.

[0008] The annular tube is located below the lower mold of the mold.

[0009] The air inlet pipe, annular pipe, and air outlet pipe are all made of hollow metal tubes.

[0010] The beneficial effects of this utility model are as follows: This utility model provides a fixed-point air-cooling device for the riser of a low-pressure casting steering knuckle. This air-cooling device can be implemented with only slight modifications to the mold, without additional cost investment. This air-cooling device can ensure the cooling effect at the riser of the casting without excessively reducing the temperature of the surrounding mold, thereby effectively improving defects such as shrinkage porosity and cold shut inside the casting. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 This is a magnified view of point A.

[0013] In the diagram: 1. Casting cavity, 2. Air duct, 3. Groove, 5. Lower riser, 6. Feed pipe, 7. Lower mold, 8. Air inlet pipe, 9. Annular pipe, 10. Air outlet pipe. Detailed Implementation

[0014] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0015] The following describes in detail the specific embodiments of this utility model with reference to the accompanying drawings: A fixed-point air-cooling device for a low-pressure casting steering knuckle riser includes an air duct 2 and a lower mold 7. The lower mold 7 includes a casting cavity 1, a lower riser 5, and a feed pipe 6. The casting cavity 1 is located at the upper end of the lower mold 7, and the lower end of the casting cavity 1 is connected to the lower riser 5. The lower end of the lower riser 5 is connected to the feed pipe 6. The air duct 2 includes an inlet pipe 8, an annular pipe 9, and an outlet pipe 10; the inlet pipe 8, annular pipe 9, and outlet pipe 10 are all made of hollow metal tubes; one end of the inlet pipe 8 is connected to the air pump outlet, and the other end of the inlet pipe 8 is connected to the annular pipe 9; the annular pipe 9 is located below the lower riser 5, and the inner diameter of the annular pipe 9 is larger than the outer diameter of the feed pipe 6 to avoid interfering with the feed of the feed pipe 6. The annular pipe 9 is generally located below the lower mold 7 and is sleeved on the outside of the feed pipe 6; in actual use, the outer diameter of the annular pipe 9 is generally smaller than the outer contour of the lower riser 5 to achieve a better cooling effect; the outlet pipes 10 are evenly distributed on the annular pipe 9, and the lower end of the outlet pipe 10 is... The end is connected to the annular pipe 9, and the upper end of the air outlet pipe 10 is open. The open end of the air outlet pipe 10 is located in the groove 3 on the lower end face of the mold lower mold 7. In this embodiment, there are four air outlet pipes 10. In actual use, the number can be increased or decreased according to specific needs. The groove 3 is a circular countersunk hole. The bottom of the groove 3 is an arc-shaped groove. The inner diameter of the groove 3 is larger than the outer diameter of the air outlet pipe 10. In actual use, air enters the groove 3 from the open end of the air outlet pipe 10. Under the action of the arc bottom of the groove 3, it is blown towards the inner wall of the groove 3 and quickly flows out from the gap between the groove 3 and the air outlet pipe 10. During the outflow process, the air quickly carries away the heat at the lower riser 5, achieving the purpose of rapid cooling.

[0016] The usage process of this utility model is as follows: First, install the air duct 2 on the lower end face of the lower mold 7; then install the lower mold 7 on the workbench of the low-pressure casting device. After installation, connect the lower end of the feed pipe 6 to the outlet of the low-pressure casting device, and connect one end of the air inlet pipe 8 of the air duct 2 to the air outlet of the air pump; after installation, install the upper mold on the lower mold 7 and fix it; after installation, start casting; during casting, compressed air enters the annular pipe 9 from the air inlet pipe 8, and then enters the air outlet pipe from the annular pipe 9. 10. Finally, the air is discharged from the opening of the vent pipe 10. The air enters the groove 3 from the opening end of the vent pipe 10. Under the action of the arc bottom of the groove 3, it blows towards the inner wall of the groove 3 and quickly flows out from the gap between the groove 3 and the vent pipe 10. During the outflow process, the air quickly carries away the heat at the lower riser 5, achieving the purpose of rapid cooling. In this process, it is ensured that the lower riser 5 is fully cooled without causing the mold as a whole to be over-cooled, thus reducing the defects such as shrinkage porosity and cold shut inside the casting.

[0017] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. 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.

[0018] The parts of this utility model not described in detail are existing technologies.

Claims

1. A fixed-point air-cooling device for a riser in a low-pressure casting steering knuckle, comprising an air duct (2) and a lower mold (7), characterized in that: The lower mold (7) includes a casting cavity (1), a lower riser (5) and a feed pipe (6); the lower end of the casting cavity (1) is connected to the lower riser (5), and the lower end of the lower riser (5) is connected to the feed pipe (6); The air duct (2) includes an air inlet pipe (8), an annular pipe (9) and an air outlet pipe (10); one end of the air inlet pipe (8) is connected to the air outlet of the air pump, and the other end of the air inlet pipe (8) is connected to the annular pipe (9); the annular pipe (9) is located below the lower riser (5), and the air outlet pipes (10) are evenly distributed on the annular pipe (9). The lower end of the air outlet pipe (10) is connected to the annular pipe (9), and the upper end of the air outlet pipe (10) is open. The open end of the air outlet pipe (10) is located in the groove (3) on the lower end face of the mold lower mold (7).

2. The fixed-point air-cooling device for a low-pressure casting steering knuckle riser according to claim 1, characterized in that: The inner diameter of the annular tube (9) is larger than the outer diameter of the feed tube (6).

3. The fixed-point air-cooling device for a low-pressure casting steering knuckle riser according to claim 1, characterized in that: The groove (3) is a circular countersunk hole, the bottom of the groove (3) is an arc-shaped groove, and the inner diameter of the groove (3) is larger than the outer diameter of the air outlet pipe (10).

4. The fixed-point air-cooling device for a low-pressure casting steering knuckle riser according to claim 1, characterized in that: The annular tube (9) is located below the lower mold (7).

5. The fixed-point air-cooling device for a low-pressure casting steering knuckle riser according to claim 1, characterized in that: The air inlet pipe (8), the annular pipe (9) and the air outlet pipe (10) are all made of hollow metal pipes.

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