Strong cooling structure of double wishbone steering knuckle casting mold

Abstract

The utility model discloses a strong cooling structure of a double-wishbone steering knuckle casting mold, which relates to the technical field of differential pressure casting molds and comprises a cooling insert, a hanging platform is arranged in the cooling insert, an inlay is installed on the hanging platform, a cavity is formed between the cooling insert and the inlay, a water inlet channel and a water outlet channel are arranged in the inlay, a water inlet joint is detachably installed on the water inlet channel, a water outlet joint is detachably installed on the water outlet channel, and the inlay and the cooling insert are fixedly connected. The utility model realizes surface cooling, and the heat exchange efficiency of surface cooling is significantly better than that of point cooling and line cooling, and can make the thick and large parts of the casting solidify quickly, effectively reduce the generation of heat fusion and shrinkage defects, and significantly improve the casting yield and quality stability of the double-wishbone steering knuckle.

Description

Technical Field

[0001] The utility model relates to the technical field of differential pressure casting moulds, in particular to a strong cooling structure of a double wishbone type steering knuckle casting mould. Background Art

[0002] Differential pressure casting is widely used in the production of automotive aluminum chassis parts, especially steering knuckles. With the rapid development of new energy vehicles, the number of double wishbone steering knuckle products is increasing. On the one hand, double wishbone steering knuckles belong to gooseneck structures and have large casting sizes; on the other hand, the lightweight competition for this type of product is becoming increasingly fierce, and product weight reduction has become the primary goal of current design and development work. This has led to the fact that most of the current double wishbone steering knuckles have large-area thin-wall structures and weight-reducing dimple structures, and the thickness difference between various parts of the casting is too large, which does not meet the solidification requirements of the casting sequence. The far end of the casting (the position of the lower control arm mounting hole) is thick and the shrinkage compensation channel is thin, resulting in heat stagnation and shrinkage defects at the thick and large position at the far end.

[0003] One of the main means to solve the shrinkage at the far end of this type of casting is to increase the cooling speed at the thickest position at the far end of the casting, eliminate the liquid phase island during the solidification process, and thus reduce the incidence of shrinkage defects after solidification. At present, the cooling methods commonly used in double wishbone steering knuckle differential pressure casting molds are spot cooling and line cooling. Although the cooling effect of line cooling is better than spot cooling, for castings with large differences in wall thickness, the cooling efficiency of line cooling is still not enough to completely eliminate the shrinkage defects at the hot junction position, thereby limiting the improvement of casting yield. Utility Model Content

[0004] In view of the above technical problems, the utility model proposes a strong cooling structure for a double-wishbone steering knuckle casting mold, including a cooling insert, a hanging platform is arranged inside the cooling insert, an inlay is installed on the hanging platform, a cavity is formed between the cooling insert and the inlay, a water inlet channel and a water outlet channel are arranged in the inlay, a water inlet joint is detachably installed on the water inlet channel, a water outlet joint is detachably installed on the water outlet channel, and the inlay is fixedly connected to the cooling insert.

[0005] Furthermore, a cooling surface is provided at the connection between the cavity and the cooling insert, and the cooling surface matches the surface of the casting.

[0006] Furthermore, the inlay and the cooling insert are welded via a weld, and the cavity is sealed by the inlay.

[0007] Further, the cooling insert is arranged at a thick area of ​​the casting.

[0008] Furthermore, the cooling insert is fixed to the casting mold body by insert fixing screws.

[0009] Furthermore, the water inlet joint is externally connected to a cooling water injection device, and the water outlet joint is externally connected to a water recovery device.

[0010] Furthermore, the distance from the cooling surface to the cavity is 8 mm-12 mm.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the utility model adopts a cavity design inside, so that cooling water flows in to form a cooling water pool, and the contact area between the cooling water and the mold insert is greatly increased, thereby realizing surface cooling. The heat exchange efficiency of surface cooling is significantly better than that of point cooling and line cooling, and can make the thick and large parts of the casting solidify quickly, effectively reducing the occurrence of heat bonding and shrinkage defects, and significantly improving the casting yield and quality stability of double wishbone steering knuckles. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the strong cooling structure of the utility model.

[0013] Figure 2 It is a top view of the strong cooling structure of the utility model.

[0014] Figure 3 For this utility model Figure 2 Cross-sectional view along the AA direction.

[0015] Figure numbers: 1-cooling insert; 2-inlay; 3-weld; 4-water inlet joint; 5-water outlet joint; 6-insert fixing screw; 7-casting; 8-cavity; 9-hanging platform; 10-cooling surface. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0017] Example: Figure 1-Figure 3 The strong cooling structure of the double-wishbone steering knuckle casting mold shown includes a cooling insert 1, a hanging platform 9 is arranged inside the cooling insert 1, an inlay 2 is installed on the hanging platform 9, a cavity 8 is formed between the cooling insert 1 and the inlay 2, a water inlet channel and a water outlet channel are arranged in the inlay 2, a water inlet joint 4 is detachably installed on the water inlet channel, a water outlet joint 5 is detachably installed on the water outlet channel, and the inlay 2 and the cooling insert 1 are fixedly connected.

[0018] A cooling surface 10 is provided at the connection between the cavity 8 and the cooling insert 1, and the cooling surface 10 matches the surface of the casting; the inlay 2 and the cooling insert 1 are welded by a weld 3, and the cavity 8 is sealed by the inlay 2; the cooling insert 1 is arranged at the thick area of ​​the casting 7; the cooling insert 1 is fixed to the casting mold body by the insert fixing screw 6; the water inlet joint 4 is externally connected to a cooling water injection device, and the water outlet joint 5 is externally connected to a water recovery device; the distance from the cooling surface 10 to the cavity 8 is 8mm-12mm.

[0019] The working principle of the utility model is as follows: in actual use, when the casting metal liquid fills the casting mold cavity, the cooling water injection device is turned on at the set time, the cooling water enters through the water inlet joint 4, and enters the cavity 8 through the water inlet channel in the inlay 2, forming a water pool in the cavity 8, and the cooling water quickly exchanges heat with the cooling insert 1 through the cooling surface 10, and takes away the heat in the thick area of ​​the casting 7 through the cooling insert 1, and finally the cooling water flows out through the water outlet channel and the water outlet joint 5 to the water recovery device for recovery.

[0020] The cooling water flow path is as follows Figure 3 As shown by the middle arrow, the cooling water will continue to flow at the set flow rate within the time specified in the casting process card.

Claims

1. Double wishbone steering knuckle casting mold strong cooling structure, characterized in that: The invention comprises a cooling insert (1), wherein a hanging platform (9) is arranged inside the cooling insert (1), an inlay (2) is mounted on the hanging platform (9), a cavity (8) is formed between the cooling insert (1) and the inlay (2), a water inlet channel and a water outlet channel are arranged inside the inlay (2), a water inlet joint (4) is detachably mounted on the water inlet channel, a water outlet joint (5) is detachably mounted on the water outlet channel, and the inlay (2) is fixedly connected to the cooling insert (1).

2. The double wishbone steering knuckle casting mold strong cooling structure according to claim 1, characterized in that: A cooling surface (10) is provided at the connection between the cavity (8) and the cooling insert (1), and the cooling surface (10) matches the surface of the casting.

3. The double wishbone steering knuckle casting mold strong cooling structure as claimed in claim 1, characterized in that: The inlay (2) and the cooling insert (1) are welded via a weld (3), and the cavity (8) is sealed by the inlay (2).

4. The double wishbone steering knuckle casting mold strong cooling structure as claimed in claim 1, characterized in that: The cooling insert (1) is arranged at a thick area of ​​the casting (7).

5. The double wishbone steering knuckle casting mold strong cooling structure as claimed in claim 1, characterized in that: The cooling insert (1) is fixed to the casting mold body via insert fixing screws (6).

6. The double wishbone steering knuckle casting mold strong cooling structure according to claim 1, characterized in that: The water inlet joint (4) is externally connected to a cooling water injection device, and the water outlet joint (5) is externally connected to a water recovery device.

7. The double wishbone steering knuckle casting mold strong cooling structure as claimed in claim 2, characterized in that: The distance between the cooling surface (10) and the cavity (8) is 8 mm to 12 mm.

Images