Mould for improving metal utilization rate of belt wheel

Abstract

The utility model relates to the technical field of aluminum alloy hub casting dies, and discloses a belt wheel metal utilization rate improving die which comprises a die body composed of a side die, a top die and a bottom die, and a weight reducing structure used for reducing the weight of a belt wheel blank casting is arranged on the die body. The weight reduction structure comprises a rim part formed by closing a top die and a side die, the width of the rim part is gradually reduced from bottom to top, the width of the lower end of the rim part is 10-10.5 mm, and the width of the upper end of the rim part is 8.2-8.6 mm. According to the utility model, the weight reduction structures such as the rim part with the gradient thinning structure and the weight reduction ribs are respectively arranged on the die body, so that the weight reduction of the rim and the outer rim of a blank casting is realized to a greater extent under the conditions of meeting the normal feeding of the upper end of the rim part and not influencing the machining clamping, the consumption of molten aluminum is saved, and the production cost is reduced. And the metal utilization rate of the belt wheel die-casting link is improved. And meanwhile, the workload of the subsequent machining procedure of the blank casting is reduced, and the production cost of the belt wheel is reduced.

Description

Technical Field

[0001] This utility model relates to the field of aluminum alloy wheel hub casting mold technology, and in particular to a mold for improving the metal utilization rate of belt wheels. Background Technology

[0002] Currently, a large number of aluminum alloy wheels are still produced using low-pressure casting technology. With increasing market competition and continuously decreasing vehicle manufacturing costs, controlling wheel production costs has become a primary means for wheel manufacturers to maintain market competitiveness. In the die-casting process of aluminum alloy wheels, improving the metal utilization rate of each mold is a key aspect of cost control.

[0003] Currently, the production of belt pulleys is limited by their unique rim structure, resulting in low metal utilization and high production costs. Traditional methods to improve metal utilization mainly focus on weight reduction design of the hub and rim areas, reducing the amount of machining required to increase metal utilization. However, existing belt pulley mold structures often cannot adequately support die-casting production, leading to either rim shrinkage or excessively low die-casting efficiency, severely hindering the smooth progress of improving belt pulley metal utilization. Therefore, developing a mold for improving belt pulley metal utilization and applying it to actual production is an urgent problem to be solved. Utility Model Content

[0004] The purpose of this utility model is to address the above-mentioned problems by providing a mold for improving the metal utilization rate of belt wheels, thereby solving the problems that existing belt wheel mold structures are prone to rim shrinkage and low casting efficiency during use, which hinders the smooth progress of the work to improve metal utilization rate.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A mold for improving the metal utilization rate of a belt wheel includes a mold body composed of a side mold, a top mold, and a bottom mold. The mold body is provided with a weight-reducing structure for reducing the weight of the belt wheel blank casting. The weight-reducing structure includes a rim portion formed by the combination of the top mold and the side mold. The width of the rim portion gradually decreases from bottom to top, so that the rim of the belt wheel blank casting has a stepped thinning structure from bottom to top.

[0007] Preferably, the width of the lower end of the rim portion is 10-10.5 mm, and the width of the upper end of the rim portion is 8.2-8.6 mm.

[0008] Preferably, the weight reduction structure further includes a weight reduction ridge provided on the lower rim of the mold body for weight reduction at the outer rim of the casting blank. The weight reduction ridge is circumferentially provided on the lower rim of the mold body and is segmented to avoid the machining clamping part of the casting blank, so that the lower rim of the casting blank is convex at the machining clamping part and the rest is concave.

[0009] Preferably, the mold body is further provided with a cooling structure, the cooling structure including an upper cooling insert corresponding to the upper end of the rim portion, the upper cooling insert being circumferentially conforming to the upper end of the rim portion to enhance the cooling efficiency of the upper end of the rim portion of the blank casting.

[0010] Preferably, the wall thickness of the side mold corresponding to the part above the waistband of the blank casting is 18-22mm, and the wall thickness corresponding to the part below the waistband of the blank casting gradually increases to 38-42mm, and the wall thickness of the part above the waistband and the part below the waistband transitions smoothly.

[0011] Preferably, the cooling structure further includes a lower cooling water ring disposed on the back of the bottom mold, the lower cooling water ring being disposed corresponding to the center hole of the blank casting, so as to provide instantaneous strong cooling to the thicker part of the center of the blank casting.

[0012] Preferably, the cooling structure further includes an upper cooling water ring disposed on the back cavity of the top mold, the upper cooling water ring being disposed corresponding to the flange portion of the blank casting.

[0013] The beneficial effects of this utility model are as follows:

[0014] This invention achieves maximum weight reduction for the rim and outer flange of the raw casting by incorporating a gradient thinning structure and weight-reducing protrusions on the mold body. This is done while ensuring normal shrinkage at the upper end of the rim and without affecting machining clamping. This saves aluminum consumption and improves metal utilization in the belt wheel die-casting process. Simultaneously, it reduces the workload of subsequent machining processes on the raw casting, lowering the production cost of the belt wheel. The cooling structure ensures the effectiveness of the weight-reducing structure while maintaining the die-casting efficiency and quality of the belt wheel. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1-2 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 3 This is a cross-sectional view of the present invention.

[0018] Figure 4 This is a three-dimensional structural diagram of the side mold in this utility model.

[0019] In the diagram: 10--Side mold; 11--Upper cooling insert; 12--Lower cooling insert 12; 20--Top mold; 21--Upper cooling water ring; 30--Bottom mold; 31--Lower cooling water ring; 40--Rim section; 50--Weight reduction protrusion. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] like Figure 1-4 As shown, a mold for improving the metal utilization rate of a belt wheel includes a mold body composed of a side mold 10, a top mold 20, and a bottom mold 30. The mold body has a weight-reducing structure to reduce the weight of the belt wheel blank casting, thereby improving the metal utilization rate in the belt wheel die-casting process and reducing production costs. The weight-reducing structure includes a rim portion 40 formed by the closing of the top mold 20 and the side mold 10. The width of the rim portion 40 gradually decreases from bottom to top, creating a stepped thinning structure for the rim of the belt wheel blank casting from bottom to top, thereby reducing the consumption of molten aluminum in the rim of the blank casting.

[0022] Preferably, the width of the lower end of the rim portion 40 is 10-10.5 mm, and the width of the upper end of the rim portion 40 is 8.2-8.6 mm. Under the premise of satisfying normal shrinkage at the upper end of the rim portion 40, the weight reduction of the blank rim can be maximized.

[0023] As a preferred embodiment, such as Figure 3-4 As shown, the weight-reducing structure also includes a weight-reducing protrusion 50 disposed on the lower rim of the mold body for weight reduction at the outer rim of the casting blank. The weight-reducing protrusion 50 is circumferentially disposed on the lower rim of the mold body, and is segmented to avoid the machining clamping area of ​​the casting blank, resulting in a shape where the lower rim of the casting blank is convex at the machining clamping area, and the remaining areas are concave. This achieves effective weight reduction at the outer rim of the casting blank without affecting the machining clamping process.

[0024] like Figure 1-3 As shown, in order to ensure the application effect of the weight reduction structure while ensuring the die casting efficiency and quality of the belt wheel, a cooling structure is also provided on the mold body. The cooling structure includes an upper cooling insert 11 provided at the upper end of the rim portion 40. The upper cooling insert 11 is circumferentially conforming to the upper end of the rim portion 40 to enhance the cooling efficiency of the upper end of the blank casting rim portion 40 and improve the problem of shrinkage defects that are prone to occur in this part.

[0025] Preferably, the wall thickness of the side mold 10 is reduced to 18-22mm above the waistband of the blank casting, and gradually increased to 38-42mm below the waistband, with a smooth transition between the wall thicknesses above and below the waistband. This ensures the aluminum melt feeding capacity above the waistband of the blank casting and improves the die-casting quality of the blank casting.

[0026] Preferably, the cooling structure further includes a lower cooling insert 12 provided below the waistband of the casting blank. The lower cooling insert 12 is embedded in the side mold 10 and can independently cool the part below the waistband of the casting blank, effectively preventing overheating of this part and improving the cooling efficiency of the die casting process.

[0027] Preferably, the cooling structure further includes a lower cooling water ring 31 disposed on the back of the bottom mold 30. The lower cooling water ring 31 is positioned corresponding to the center hole of the blank casting. The lower cooling water ring 31 is a hollow annular structure and is connected to the cooling circulating water, enabling instantaneous and intense cooling of the thicker central part of the blank casting. This achieves cooling of this part in a short time, preventing excessive cooling conduction to the spokes and mitigating the problem of prolonged cooling of this part causing poor cooling of the spokes. It also avoids the interception of molten aluminum on the spokes, ensuring die-casting quality while improving cooling efficiency.

[0028] Preferably, the cooling structure further includes an upper cooling water ring 21 disposed on the back cavity of the top mold 20. The upper cooling water ring 21 is disposed corresponding to the flange part of the blank casting. It can also provide instantaneous strong cooling to the center part of the blank casting, and can work together with the upper cooling ring to act on both sides of the blank casting, further improving the cooling efficiency and die casting quality.

[0029] The above-disclosed embodiments are merely specific examples of this utility model, but this utility model is not limited thereto. For those skilled in the art, any modifications made without departing from the principle of this utility model should be considered as protected by this utility model.

Claims

1. A waist belt wheel metal utilization improvement mold characterized by: The mold body consists of a side mold (10), a top mold (20) and a bottom mold (30). The mold body is provided with a weight-reducing structure for reducing the weight of the belt wheel blank casting. The weight-reducing structure includes a rim portion (40) formed by the combination of the top mold (20) and the side mold (10). The width of the rim portion (40) gradually decreases from bottom to top, so that the rim of the belt wheel blank casting has a stepped thinning structure from bottom to top.

2. The waistband wheel metal utilization improvement mold of claim 1, wherein: The width of the lower end of the rim portion (40) is 10-10.5 mm, and the width of the upper end of the rim portion (40) is 8.2-8.6 mm.

3. The waistband wheel metal utilization improvement mold of claim 1, wherein: The weight reduction structure also includes a weight reduction ridge (50) provided on the lower rim of the mold body. The weight reduction ridge (50) is circumferentially provided on the lower rim of the mold body, and the weight reduction ridge (50) is segmented to avoid the machining clamping part of the blank casting.

4. The waistband wheel metal utilization improvement mold of claim 1, wherein: The mold body is also provided with a cooling structure, which includes an upper cooling insert (11) provided at the upper end of the rim (40). The upper cooling insert (11) is circumferentially shaped to correspond to the upper end of the rim (40) to enhance the cooling efficiency of the upper end of the rim (40) of the blank casting.

5. The waistband wheel metal utilization improvement mold of claim 1, wherein: The wall thickness of the side mold (10) is 18-22mm for the part above the waistband of the blank casting, and gradually increases to 38-42mm for the part below the waistband of the blank casting, with a smooth transition between the wall thickness of the part above the waistband and the part below the waistband.

6. The waistband wheel metal utilization improvement mold of claim 4, wherein: The cooling structure also includes a lower cooling water ring (31) set on the back of the bottom mold (30). The lower cooling water ring (31) is set in relation to the center hole of the blank casting. The lower cooling water ring (31) is a hollow ring structure that is connected to the cooling circulating water to provide instantaneous strong cooling to the thicker part of the center of the blank casting.

7. The waistband wheel metal utilization improvement mold of claim 6, wherein: The cooling structure also includes an upper cooling water ring (21) disposed on the back cavity of the top mold (20), the upper cooling water ring (21) being disposed corresponding to the flange portion of the blank casting.

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