Propeller hub casting system

Abstract

The utility model discloses a propeller hub casting system which comprises a forming unit, a sprue unit and a casting unit, the forming unit comprises a section mold, and the section mold is provided with a cavity used for forming; the pouring gate unit comprises a lower-layer inner pouring gate and an upper-layer pouring gate assembly, the lower-layer inner pouring gate is arranged at the bottom of the swage die, the upper-layer pouring gate assembly comprises a blind riser, the blind riser is arranged on the swage die and located at the position above the lower-layer inner pouring gate, and the lower-layer inner pouring gate and the blind riser are both communicated with the cavity; the casting unit is communicated with the sprue unit and is used for conveying casting materials into the cavity; according to the propeller hub casting system, the double-layer casting gates are arranged, the blind risers are arranged on the upper layer, effective feeding can be conducted on the inner gates on the upper layer and the lower layer at the same time in the casting process through the arrangement of the blind risers, the defects of shrinkage porosity and slag inclusion at the inner gates are overcome, and the rejection rate of products is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to foundry technology field relates to a hub casting system. BACKGROUND

[0002] The hub is the important component of the propeller, specifically, it is the part of each blade installation combination, located at the end of the propeller, mostly conical or circular table shape, and the stern shaft is mutually pasted, and the back place is opened a key groove, and is inlaid with the key, and it is the key component of the stern shaft driving the propeller rotation. The common hub is mostly copper alloy cast forming, when carrying out the hub casting, the opening end of the mold is upwards, then the whole circle riser is placed at the position of the opening of the mold top, the other window position is placed the blind riser, the inside and outside adopt the gradual change cold iron to form the similar metal mold pouring, finally one or more layers of ingates are arranged at the closed end (that is, the bottom) of the pouring mold, so that the copper water enters the cavity of the mold from the bottom, the pouring method can cause the overheating of the ingate at the closed end, shrinkage and slag inclusion, and the welding repair exceeds the standard, so that the scrap rate is high.

[0003] In order to solve the above problems, a hub casting system is needed, which can solve the shrinkage and slag inclusion defects of the ingate, and improve the product qualification rate. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model provides a hub casting system, sets up double -layer casting mouth, and the upper layer sets up blind riser, and the setting of blind riser can effectively supplement the shrinkage and slag inclusion of the upper and lower two layers of ingates during the casting process, solve the shrinkage and slag inclusion defects of the ingate, and greatly reduce the scrap rate of the product.

[0005] The utility model discloses a hub casting system, which comprises:

[0006] The forming unit comprises a mold, and the mold has a cavity for forming;

[0007] The gate unit comprises a lower ingate and an upper gate assembly, the lower ingate is arranged at the bottom of the mold, the upper gate assembly comprises a blind riser, the blind riser is arranged at the position above the lower ingate of the mold, and the lower ingate and the blind riser are in communication with the cavity;

[0008] The pouring unit is connected to the gate unit for conveying pouring material into the cavity.

[0009] Further, the upper gate assembly further comprises an upper ingate, the upper ingate is arranged at the mold, and the upper ingate is in communication with the blind riser and the cavity.

[0010] Further, the upper ingate is arranged obliquely downward from front to back.

[0011] Further, the top surface of the upper-layer ingate is arranged at an angle with the riser in the radial direction, the included angle between the top surface of the upper-layer ingate and the riser is α, and the angle of the included angle α is between 8° and 12°.

[0012] Further, the bottom surface of the upper-layer ingate is arranged at an angle with the riser in the radial direction, the included angle between the bottom surface of the upper-layer ingate and the riser is β, and the angle of the included angle β is between 22° and 26°.

[0013] Further, the molding unit further comprises a plurality of shape chills, and the plurality of shape chills are arranged in the mold.

[0014] Further, the molding unit further comprises a top riser arranged on the top surface of the mold.

[0015] Further, the molding unit further comprises a shaft hole riser, the mold has a shaft hole, and the shaft hole riser is arranged in the shaft hole.

[0016] Further, the riser is uniformly distributed along the circumference of the mold, the number of the lower-layer ingates is the same as that of the risers, and the lower-layer ingates are arranged in one-to-one correspondence with the risers.

[0017] The molding unit has the following beneficial effects:

[0018] The molding unit has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The utility model discloses a structure schematic isohedral side view of;

[0020] Figure 2 The utility model discloses a structure schematic front view of;

[0021] Figure 3 The utility model discloses a structure schematic view of upper-layer ingate subassembly. DETAILED DESCRIPTION

[0022] It should be noted that in the description of the present application, the terms "upper", "lower", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The beginning and end of the present embodiment and the front and back are based on the order of the flow of the medium, that is, the front is the beginning, which is understood by those skilled in the art, and will not be described here.

[0023] As shown in the figure, the utility model discloses a hub casting system, including:

[0024] The forming unit comprises a mold, and the mold has a cavity for forming. The sprue unit comprises a lower inner gate 2 and an upper gate assembly. The lower inner gate 2 is arranged at the bottom of the mold. The upper gate assembly comprises a blind riser 3, which is arranged at the mold and located directly above the lower inner gate 2. Both the lower inner gate 2 and the blind riser 3 are in communication with the cavity. The casting unit is in communication with the sprue unit for conveying the casting material into the cavity. The mold in the present embodiment is a wooden mold, and the casting unit is mainly used for conveying copper water and other casting materials. Those skilled in the art can select a specific mode according to the actual situation. The casting unit in the present embodiment comprises a straight gate 9 and a cross gate 8. The cross gate 8 is located below the entire mold and is connected to the lower inner gate 2 and the blind riser 3 respectively. During casting, the casting material first enters from the lower inner gate 2, and when the casting reaches the height position of the upper casting unit, both layers are casted simultaneously. In addition, due to the arrangement of the blind riser 3, not only the lower inner gate 2 is compensated, but also the upper layer is compensated, which solves the shrinkage and slag inclusion defects at the inner gate, greatly reduces the scrap rate of the product. In the present embodiment, the blind riser 3 is uniformly distributed along the circumference of the mold, and there are four blind risers 3. The number of lower inner gates 2 is the same as that of blind risers 3, and the lower inner gates 2 and the blind risers 3 are arranged one by one.

[0025] In the embodiment, the upper-layer gate assembly further comprises an upper-layer ingate 4 arranged on the mold, and the upper-layer ingate 4 connects the blind riser 3 and the cavity. In the embodiment, the upper-layer ingate 4 is arranged obliquely downward from front to back. In the embodiment, the top surface of the upper-layer ingate 4 is arranged at an angle with the blind riser 3 in the radial direction, and the top surface of the upper-layer ingate 4 forms an included angle α with the blind riser 3 in the radial direction, and the angle α is between 8° and 12°. In the embodiment, the bottom surface of the upper-layer ingate 4 is arranged at an angle with the blind riser 3 in the radial direction, and the bottom surface of the upper-layer ingate 4 forms an included angle β with the blind riser 3 in the radial direction, and the angle β is between 22° and 26°. In the embodiment, the blind riser 3 is arranged on the mold through the upper-layer ingate 4 and connected with the cavity, and the oblique arrangement of the upper-layer ingate 4 is more conducive to the feeding of the lower-layer ingate 2, and at the same time, the angle α is arranged to be smaller than the angle β, so that the upper-layer ingate gradually increases from front to back as shown in the figure, and the feeding quality of the upper-layer and lower-layer ingates is further improved. In the embodiment, the angle α is 10°, and the angle β is 24°, and the feeding effect is best at the angles, and the pouring flow is the most smooth

[0026] In the embodiment, the mold further comprises a plurality of mold-attached chills 5, and the mold-attached chills 5 are arranged on the mold. As shown in the figure, the mold-attached chills 5 are arranged on the mold, and the arrangement mode can be selected by those skilled in the art according to actual conditions, such as being separately arranged on the mold, directly attached or inlaid on the mold, and the like, which can be understood by those skilled in the art, and will not be described here.

[0027] In the embodiment, the molding unit further comprises a top riser 6 arranged on the top surface of the mold 1. In the embodiment, the molding unit further comprises a shaft-hole riser 7 arranged in a shaft hole of the mold. As shown in the figure, the top riser 6 is arranged on the top of the mold, and the shaft-hole riser 7 is separately arranged at the position of the shaft hole, and the shaft-hole riser 7 is also arranged in the form of a blind riser. The arrangement of multiple risers plays the role of exhaust and feeding, and can reduce defects and further improve the quality of finished products.

[0028] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the utility model and not to limit the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the utility model can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions of the utility model, and all of them should be covered in the scope of the claims of the utility model.

Claims

1. A hub casting system characterized by, The application relates to a molding unit, a gate unit and a casting unit. The molding unit comprises a mold, and a cavity for molding is formed in the mold. The gate unit comprises a lower inner gate and an upper gate assembly, the lower inner gate is arranged at the bottom of the mold, the upper gate assembly comprises a blind riser, the blind riser is arranged at the mold and located above the lower inner gate, and the lower inner gate and the blind riser are communicated with the cavity. The casting unit is communicated with the gate unit for conveying casting material into the cavity.

2. The hub casting system of claim 1, wherein: The upper gate assembly further comprises an upper inner gate, the upper inner gate is arranged at the mold, and the upper inner gate communicates the blind riser with the cavity.

3. The hub casting system of claim 2, wherein: The upper inner gate is arranged in a forward-to-backward and downward inclined manner.

4. The hub casting system of claim 2, wherein: The top surface of the upper inner gate is arranged at an angle with the blind riser in the radial direction, the included angle between the top surface of the upper inner gate and the blind riser is alpha, and the angle of the included angle alpha is 8-12 degrees.

5. The hub casting system of claim 2, wherein: The bottom surface of the upper inner gate is arranged at an angle with the blind riser in the radial direction, the included angle between the bottom surface of the upper inner gate and the blind riser is beta, and the angle of the included angle beta is 22-26 degrees.

6. The hub casting system of claim 1, wherein: A plurality of patterned chills are arranged in the mold.

7. The hub casting system of claim 1, wherein: The molding unit further comprises a top riser, and the top riser is arranged at the top surface of the mold.

8. The hub casting system of claim 1, wherein: The molding unit further comprises a shaft hole riser, the mold has a shaft hole, and the shaft hole riser is arranged in the shaft hole.

9. The hub casting system of claim 1, wherein: The blind risers are uniformly distributed along the circumference of the mold, the number of the lower inner gates is the same as that of the blind risers, and the lower inner gates are arranged in one-to-one correspondence with the blind risers.

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