Casting process model structure for planet carrier

Abstract

The utility model provides a casting process model structure for a planet carrier, which comprises a first vertical pouring gate, a second vertical pouring gate and a third vertical pouring gate, the pouring gate nest is connected to the bottom end of the vertical pouring gate; the transverse pouring gate is connected to one side of the pouring gate nest and is integrally in a C shape, and slag collecting ladles are arranged at the two ends of the transverse pouring gate; the casting is arranged on the concave side of the cross gate and is half surrounded by the cross gate; the multiple first water inlet pieces are distributed on the inwards-concave side of the transverse pouring gate; the second vertical pouring gate is connected to the lower part of the first water inlet sheet; one end of the second water inlet sheet is connected to one side, close to the casting, of the bottom of the second downsprue, and the other end is connected to the casting; and the riser part is connected to the upper part of the casting. According to the utility model, the problems of low product yield, low template utilization rate, difficulty in processing and grinding operation after product offline and low production efficiency of the existing equipment are solved, the product sand core wrapping mode and the product riser placing position are reasonably designed, the product shrinkage porosity is eliminated, the product yield is improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of metal casting, in particular to a casting process model structure for a planetary frame. Background Art

[0002] In the traditional foundry industry, the product layout, number of mold cavities, weight of sand cores, number of uses and assembly methods, template utilization, and product quality are all important factors affecting a company's casting costs. The structure of the planetary carrier (differential carrier) is very different from the shape of other differential housing products. The wall thickness of the products is almost the same, and the product connection structure has many cavities. The heat nodes are relatively dispersed and numerous. In addition, this type of product has high requirements for product size, shrinkage, and various mechanical properties. Using traditional casting process solutions requires multiple risers to compensate for shrinkage. Therefore, the traditional casting process design results in extremely low product yields, low template utilization, and difficult post-processing grinding operations after the product is offline, resulting in low production efficiency. Utility Model Content

[0003] The main purpose of the utility model is to provide a casting process model structure for a planetary carrier, which overcomes the above technical problems.

[0004] In order to achieve the above purpose, the present invention proposes the following technical solutions:

[0005] A casting process model structure for a planetary carrier, comprising:

[0006] The first vertical pouring channel is arranged vertically;

[0007] The sprue nest is connected to the bottom end of the vertical sprue;

[0008] The horizontal runner is connected to one side of the runner nest and is in a "C" shape with slag collection bags at both ends.

[0009] The casting is set on the concave side of the runner and is half surrounded by the runner;

[0010] A first water inlet piece, wherein a plurality of first water inlet pieces are distributed on the concave side of the runner;

[0011] The second vertical pouring channel is connected to the bottom of the first water inlet piece;

[0012] A second water inlet piece, one end of which is connected to the bottom of the second vertical pouring channel close to the casting, and the other end of which is connected to the casting;

[0013] The riser part is connected to the upper part of the casting.

[0014] Furthermore, a filter sheet is provided at the connection between the runner cavity and the runner.

[0015] Furthermore, the riser part includes: a riser, an insulation sleeve, and a riser neck. The riser is connected to the casting, the insulation sleeve is arranged on the outer ring of the riser, and multiple riser necks are arranged on the outer ring of the insulation sleeve.

[0016] Furthermore, a solid central axis hole structure is provided at the lower center position of the casting.

[0017] Furthermore, the first vertical runner is cylindrical as a whole, with a diameter of 40 mm and a height of 180 mm.

[0018] Furthermore, the runner socket is cylindrical as a whole, with a diameter of 40 mm and a height of 50 mm.

[0019] Furthermore, the size of the filter residue sheet is 50mm*50mm*10mm.

[0020] Furthermore, the cross-sectional area of ​​the first water inlet is 99 mm 2 .

[0021] Furthermore, the cross-sectional area of ​​the second vertical runner is 188 mm 2 .

[0022] Furthermore, the cross-sectional area of ​​the second water inlet is 99 mm 2 .

[0023] The utility model provides a casting process model structure for a planetary carrier, which solves the problems of low output rate of existing equipment, low template utilization rate, difficult post-processing grinding operation of products, and low production efficiency. The product sand core wrapping method and product riser placement position are reasonably designed, and a method of using one riser and multiple shrinkage feeding channels is used to effectively feed the product, thereby reducing the number of risers used, eliminating product shrinkage, improving product output rate, and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1 This is a structural diagram of a preferred embodiment of the present application.

[0026] Figure 2 This is a side view of a preferred embodiment of the present application.

[0027] Figure 3 This is a top view of a preferred embodiment of the present application.

[0028] Figure 4 for Figure 2 CC cross-sectional view.

[0029] The above drawings include the following reference numerals:

[0030] 1. First vertical runner; 2. Runner nest; 3. Slag filter; 4. Horizontal runner; 5. Slag collection bag; 6. First water inlet; 7. Second vertical runner; 8. Second water inlet; 9. Casting; 10. Riser part; 11. Solid structure of center axis hole; 101. Riser; 102. Insulation sleeve; 103. Riser neck. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0033] Reference below Figures 1 to 2 , the utility model is further described:

[0034] A casting process model structure for a planetary carrier, characterized by comprising:

[0035] The first vertical pouring channel 1 is arranged vertically.

[0036] In a preferred embodiment, the first vertical runner 1 is cylindrical as a whole, with a diameter of 40 mm and a height of 180 mm.

[0037] The runner nest 2 is connected to the bottom end of the vertical runner 1 .

[0038] In a preferred embodiment, the runner socket 2 is cylindrical as a whole, with a diameter of 40 mm and a height of 50 mm.

[0039] The horizontal runner 4 is connected to one side of the runner cavity 2 and is in a "C" shape as a whole, with slag collecting bags 5 provided at both ends.

[0040] The casting 9 is arranged on the concave side of the runner 4 and is half surrounded by the runner 4 .

[0041] A central axis hole solid structure 11 is provided at the lower center of the casting 9 .

[0042] The first water inlet piece 6 , and a plurality of first water inlet pieces 6 are distributed on the concave side of the runner 4 .

[0043] In a preferred embodiment, the cross-sectional area of ​​the first water inlet piece 6 is 99 mm 2 .

[0044] The second vertical pouring channel 7 is connected to the lower side of the first water inlet piece 6 .

[0045] In a preferred embodiment, the cross-sectional area of ​​the second vertical runner 7 is 188 mm 2 .

[0046] The second water inlet piece 8 has one end connected to the bottom of the second vertical runner 7 close to the casting 9 and the other end connected to the casting 9 .

[0047] In a preferred embodiment, the cross-sectional area of ​​the second water inlet piece 8 is 99 mm 2 .

[0048] The riser portion 10 is connected to the upper portion of the casting 9.

[0049] The riser part 10 includes: a riser 101, an insulation sleeve 102, and a riser neck 103. The riser 101 is connected to the casting 9, the insulation sleeve 102 is arranged on the outer ring of the riser 101, and multiple riser necks 103 are arranged on the outer ring of the insulation sleeve 102.

[0050] In a preferred embodiment, the cross-sectional area of ​​the riser neck 103 is 30 mm 2

[0051] A filter sheet 3 is provided at the connection between the runner cavity 3 and the runner 4 .

[0052] In a preferred embodiment, the size of the filter residue sheet 3 is 50 mm*50 mm*10 mm.

[0053] This application is applicable to products with special structure, dispersed hot spots, strict dimensional requirements, uneven wall thickness, and double-layer shell products with four symmetrical spherical structures in the inner cavity connected by three ribs in the middle. During casting and shrinkage feeding, the molten metal passes through the first vertical runner 1, flows through the horizontal runner 4, the first water inlet plate 6, the second vertical runner 7, the second water inlet plate 8, and other parts to fill into the product cavity. After entering the lower end of the product cavity, the molten metal flows into the solid structure 11 of the central axis hole through the three second water inlet plates 8. As the molten metal level rises to the four symmetrical spherical structures, it enters the riser structure of the multiple shrinkage feeding channels through the riser neck 103. Finally, the molten metal fills the casting cavity and the multiple shrinkage feeding channel riser 101.

[0054] The working process of this utility model is: the process model structure forms a sand model cavity, and the assembled full sand core and the insulation sleeve 102 of the outer ring of the riser are placed in the sand mold structure. The molten metal flows into the runner nest 2 at the bottom through the first vertical runner 1, and then passes through the filter slag sheet 3 to filter out most of the larger impurities in the molten metal, and the flow rate of the molten metal slows down. The molten metal enters the horizontal runner 4 through the outer mold outlet of the filter slag sheet 3. A slag collecting bag 5 is provided at the end of the horizontal runner 4 to collect slag and slow down the flow. The molten metal enters the three first water inlet pieces 6 respectively and enters the second vertical runner 7 connected to each other, and then enters the product cavity through the second water inlet piece 8. After entering the bottom of the product and reaching a certain liquid level height, it enters the central axis hole solid structure 11 through the three second water inlet pieces 8 respectively. As the liquid level rises to four symmetrical spherical structures, the molten metal enters the riser 101 through the four riser necks 103 connected to the four spherical structures, completing the final filling process. The solid structure 11 of the central shaft hole and the riser structure of the multiple shrinkage feeding channels are located in the most central position of the casting. The molten metal solidifies last in the entire solidification process, and more effectively utilizes the eutectic graphitization expansion in the late solidification stage to offset the solidification shrinkage, thereby achieving the purpose of eliminating shrinkage cavities and ensuring product quality.

[0055] During the sequential solidification process, the molten metal at the first and second water inlet plates 6 and 8 completes solidification first, completely isolating the casting 11 from the molten iron in the entire casting system, forming a closed whole. This not only prevents the loss of molten metal through the runner and the reduction in pressure caused by graphitization expansion, but also the solid structure of the central axial hole fully utilizes the eutectic graphitization expansion in the later stages of solidification to offset solidification shrinkage. The insulation sleeve also reduces the solidification rate of the molten iron in the riser 101, allowing the casting to be fed simultaneously through four feeding channels, greatly improving feeding efficiency.

[0056] Compared with the prior art, the beneficial effects of the present invention are:

[0057] (1) The design of the sand core all-inclusive product reduces the product size tolerance from ±0.8mm to ±0.5mm;

[0058] (2) A novel casting process with one riser and multiple feeding channels in the inner cavity replaces the need to use four risers on the outside of the product to feed the product, reducing the number of risers used and improving the product retention rate;

[0059] (3) The four risers on the outside of the product are eliminated and replaced with a feeding method with one insulation sleeve riser and four feeding channels in the middle cavity, which reduces the space occupied by single-cavity products and increases the number of mold cavities from six to eight, thereby improving the template utilization rate;

[0060] (4) The pin hole boss of the lower disc is made hollow, which evens out the wall thickness of the lower disc, reduces the amount of pin hole processing, and reduces product processing costs;

[0061] (5) The center ring area of ​​the lower disc was changed from a solid column to a column connected by three thin sheets, eliminating the drilling process;

[0062] (6) The process scheme of this structure can be applied horizontally to other factories to improve products and reduce production costs;

[0063] (7) This structure can be horizontally extended and applied to bivalve products with similar structures, and has a wide range of applications.

[0064] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0065] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0066] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A casting process model structure for a planetary carrier, characterized in that: include: A first vertical pouring channel (1) is vertically arranged; A runner socket (2) connected to the bottom end of the vertical runner (1); A horizontal runner (4) is connected to one side of the runner nest (2) and is in a "C" shape as a whole, with slag collecting bags (5) provided at both ends; A casting (9) is arranged on the concave side of the runner (4) and is half-surrounded by the runner (4); a first water inlet piece (6), wherein a plurality of the first water inlet pieces (6) are distributed on the concave side of the runner (4); A second vertical pouring channel (7) is connected to the lower side of the first water inlet piece (6); A second water inlet plate (8), one end of which is connected to the bottom of the second vertical pouring channel (7) close to the casting (9), and the other end of which is connected to the casting (9); The riser portion (10) is connected to the upper portion of the casting (9).

2. A casting process model structure for a planetary carrier according to claim 1, characterized in that: A filter residue sheet (3) is provided at the connection between the runner nest (2) and the runner (4).

3. The casting process model structure for a planetary carrier according to claim 1, characterized in that: The riser part (10) comprises: a riser (101), a thermal insulation sleeve (102), and a riser neck (103); the riser (101) is connected to the casting (9); the thermal insulation sleeve (102) is arranged on the outer ring of the riser (101); and a plurality of riser necks (103) are arranged on the outer ring of the thermal insulation sleeve (102).

4. The casting process model structure for a planetary carrier according to claim 1, characterized in that: A central axis hole solid structure (11) is provided at the lower center of the casting (9).

5. The casting process model structure for a planetary carrier according to claim 1, characterized in that: The first vertical pouring channel (1) is cylindrical in shape as a whole, with a diameter of 40 mm and a height of 180 mm.

6. The casting process model structure for a planetary carrier according to claim 1, characterized in that: The runner nest (2) is cylindrical as a whole, with a diameter of 40 mm and a height of 50 mm.

7. The casting process model structure for a planetary carrier according to claim 2, characterized in that: The size of the filter residue sheet (3) is 50mm*50mm*10mm.

8. The casting process model structure for a planetary carrier according to claim 3, characterized in that: The cross-sectional area of ​​the first water inlet piece (6) is 99 mm 2 .

9. A casting process model structure for a planetary carrier according to claim 8, characterized in that: The cross-sectional area of ​​the second vertical runner (7) is 188 mm 2 .

10. The casting process model structure for a planetary carrier according to claim 1, characterized in that: The cross-sectional area of ​​the second water inlet plate (8) is 99 mm 2 .

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