A gating system for a main reduction gear housing

Abstract

The application discloses a pouring system of a main reducer shell and relates to the technical field of reducer casting. The application comprises a casting and a sprue; the lower end of the sprue is symmetrically connected with a pair of buffer runners; the upper part of the end of the two buffer runners away from the sprue is vertically connected with top edge-pressing risers; the lower part of the end of one buffer runner away from the sprue is provided with an intermediate-layer inner gate; the lower part of the end of the other buffer runner away from the sprue is vertically connected with a molten iron conveying channel; the lower end of the molten iron conveying channel is horizontally connected with a cross runner; and a plurality of bottom-layer inner gates are arranged side by side on the cross runner. The application is based on a three-layer stepped pouring structure, can not only make the pouring of the main reducer shell stable, but also solve the problem of most dispersed thermal section feeding, and can eliminate product shrinkage and porosity and realize the purpose of producing high-quality castings by utilizing the temperature gradient formed by the pouring system and the reasonable setting of cold irons and cold ribs.

Description

Technical Field

[0001] This invention belongs to the field of speed reducer casting technology, and in particular relates to a gating system for a main speed reducer housing. Background Technology

[0002] Due to the special structure and inherent functional requirements of the main reducer housing in current technology, it has become a product with high quality requirements. In order to speed up production, the casting process is generally used to manufacture this type of product.

[0003] Currently, existing gating systems for main reducer housings address shrinkage cavities and porosity by adding risers (including cold risers) or chills. However, for main reducer housings, due to their numerous and dispersed hot spots, traditional gating systems struggle to adequately address these areas, resulting in incomplete solutions to shrinkage cavities and porosity. Furthermore, traditional gating systems are not only inefficient but also costly. Therefore, there is an urgent need to research and develop a new gating system for main reducer housings to address these issues. Summary of the Invention

[0004] The present invention provides a casting system for a main reducer housing, the purpose of which is to solve the technical problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0006] This invention relates to a gating system for a main reducer housing, comprising a casting and a sprue vertically disposed on one side of the casting; a pair of horizontally disposed buffer channels are symmetrically connected to the lower end of the sprue; a top edge riser is vertically connected to the upper part of the upper part of the two buffer channels away from the sprue; the lower parts of the two top edge risers abut against the upper edge of the casting; an intermediate ingate is disposed at the lower part of the lower part of the lower part of one of the buffer channels away from the sprue; the intermediate ingate is connected to the casting. On the middle outer wall of the casting; a molten iron conveying channel is vertically connected to the lower part of the other slow flow channel away from the sprue; a horizontal runner is horizontally connected to the lower end of the molten iron conveying channel; multiple bottom ingates are arranged side by side on the horizontal runner; multiple bottom ingates are all connected to the lower outer wall of the casting; a first chill is arranged side by side on the upper outer wall of the casting; a second chill is arranged side by side on the upper hole wall of the casting; a third chill is arranged on the lower inner wall of the casting.

[0007] As a preferred embodiment of the present invention, the upper edge of the casting is provided with cold ribs arranged side by side; the cold ribs and the first chill are both located above the horizontal runner.

[0008] As a preferred embodiment of the present invention, both of the slow-flow channels are vertically equipped with filter screens inside.

[0009] The present invention has the following beneficial effects:

[0010] 1. This invention utilizes a stepped gating system to solve most of the shrinkage problems caused by dispersed heat points. At the same time, it uses the temperature gradient formed by the gating system to set chills and chilled ribs, eliminating shrinkage cavities and porosity in the product, thereby achieving the goal of producing high-quality castings.

[0011] 2. This invention delivers molten iron into a slow-flow channel via a sprue, prompting the molten iron to enter the top edge riser, the middle layer ingate, and the molten iron conveying channel. The molten iron then flows through the molten iron conveying channel, the horizontal sprue, and the bottom ingate into the casting cavity, thus achieving a three-layer stepped pouring process for the main reducer housing casting. This not only ensures a smooth pouring process but also eliminates shrinkage cavities at the flange position of the main reducer housing by using an external heated riser and a second chill. Furthermore, the bottom layer of the main reducer housing employs a multi-stage ingate system to disperse heat, combined with a third chill, which solves the problem of shrinkage cavities at the bottom thermal section. Finally, the top of the main reducer housing uses two edge risers combined with chilled ribs and a first chill, which solves the problem of shrinkage cavities at the upper flange boss.

[0012] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the casting system for a main reducer housing according to the present invention.

[0015] Figure 2 This is a schematic diagram showing the relative position between the casting and the runner of the present invention.

[0016] Figure 3 This is a schematic diagram showing the relative position between the casting and the second chill of the present invention.

[0017] Figure 4 This is a schematic diagram showing the relative position between the casting and the third chill of the present invention.

[0018] Figure 5 This is a schematic diagram of the connection between the straight runner, the slow flow runner and the horizontal runner of the present invention.

[0019] Figure 6 This is a schematic diagram of the connection between the direct gating system and the slow flow channel of the present invention.

[0020] The attached diagram lists the components represented by each number as follows:

[0021] 1-Casting, 2-Straight sprue, 3-Slow flow channel, 4-Top edge riser, 5-Intermediate layer ingate, 6-Iron conveying channel, 7-Gateway, 8-Bottom layer ingate, 9-First chill, 10-Second chill, 11-Third chill, 12-Chilling rib, 13-Filter screen. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example:

[0024] Please see Figure 1-6As shown, this invention is a casting system for a main reducer housing, including a conventional casting 1 and a sprue 2 vertically arranged on one side of the casting 1. The main reducer housing casting has a conventional structure in the art, with an approximately elliptical upper part and a circular lower part, and vertically arranged part mounting holes in the upper part. The specific structure is a conventional design in the art and will not be described in detail here. A pair of horizontally arranged slow-flow channels 3 are symmetrically connected to the lower end of the sprue 2. Both slow-flow channels 3 are vertically equipped with conventional filter screens 13 in the art, which can filter the molten iron. A top edge riser 4 is vertically connected to the upper part of the end of each slow-flow channel 3 away from the sprue 2. The lower part of both top edge risers 4 abuts against the upper edge of the casting 1. An intermediate layer ingate 5 is provided at the lower part of the end of one slow-flow channel 3 away from the sprue 2. The intermediate layer ingate 5 is connected to the middle outer wall of the casting 1. Another slow flow channel 3 is vertically connected to the lower part of the end away from the sprue 2, which is connected to the molten iron conveying channel 6; the lower end of the molten iron conveying channel 6 is horizontally connected to the arc-shaped sprue 7; multiple bottom ingates 8 are arranged side by side on the sprue 7; the multiple bottom ingates 8 are all connected to the lower outer wall of the casting 1; a pair of first chills 9 are arranged side by side on the upper outer wall of the casting 1; the first chills 9 are located on the side of the molten iron conveying channel 6 away from the sprue 2; a pair of second chills 10 are arranged side by side on the upper hole wall of the casting 1; the second chills 10 are located between the two top edge risers 4; a third chill 11 is arranged on the lower inner wall of the casting 1; the third chill 11 is located between the first chills 9 and the second chills 10; a pair of chilling ribs 12 are arranged side by side on the upper edge of the casting 1; the two chilling ribs 12 are located between the two first chills 9; the chilling ribs 12 and the first chills 9 are both located above the sprue 7.

[0025] In use, molten iron is fed into the slow flow channel 3 through the sprue 2, which promotes the molten iron to enter the top edge riser 4, the middle layer ingate 5, and the molten iron conveying channel 6. Then, the molten iron enters the cavity of the casting 1 through the molten iron conveying channel 6, the horizontal sprue 7, and the bottom ingate 8, thereby realizing three-layer stepped pouring of the main reducer housing casting. Not only is the pouring process stable, but the middle annular flange position of the main reducer housing adopts an external heated riser and is equipped with a second chill 10, which can eliminate the shrinkage cavity at the flange position of the main reducer housing (which can eliminate the quality fluctuation caused by the internal cold riser or hot riser method compared with the original process). At the same time, the bottom layer of the main reducer housing adopts a multi-stage ingate method to disperse heat and is equipped with a third chill 11, which can solve the problem of shrinkage cavity at the bottom hot section. Furthermore, the top of the main reducer housing adopts two edge risers and is equipped with a cold rib 12 and a first chill 9, which can solve the problem of shrinkage cavity at the upper flange boss.

[0026] Of course, the gating system of the main reducer housing also has components such as waste liquid and gas discharge channels. These are all conventional designs in the field. Those skilled in the art can install and use components such as waste liquid and gas discharge channels based on the existing gating system. Therefore, the installation and use of components such as waste liquid and gas discharge channels will not be described in detail here.

[0027] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A casting system for a main reducer housing, characterized in that, It includes a casting (1) and a sprue (2) vertically arranged on one side of the casting (1); The lower end of the sprue (2) is symmetrically connected to a pair of horizontally arranged runners (3); the upper part of the two runners (3) away from the sprue (2) is vertically connected to a top edge riser (4); the lower part of the two top edge risers (4) abuts against the upper edge of the casting (1); an intermediate layer ingate (5) is provided at the lower part of the end of one runner (3) away from the sprue (2); the intermediate layer ingate (5) is connected to the middle outer wall of the casting (1); the other runner (3) is away from the sprue (2) One end of the casting (1) is vertically connected to a molten iron conveying channel (6); the lower end of the molten iron conveying channel (6) is horizontally connected to a horizontal gating system (7); multiple bottom ingates (8) are arranged side by side on the horizontal gating system (7); the multiple bottom ingates (8) are all connected to the lower outer wall of the casting (1); a first chill (9) is arranged side by side on the upper outer wall of the casting (1); a second chill (10) is arranged side by side on the upper hole wall of the casting (1); a third chill (11) is arranged on the lower inner wall of the casting (1). The upper edge of the casting (1) is provided with cold ribs (12) arranged side by side. The chilled rib (12) and the first chill (9) are both located above the horizontal runner (7); Both of the aforementioned slow-flow channels (3) are vertically equipped with filter screens (13).

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