Planet carrier casting structure for coal mining machine

Abstract

The planet carrier casting structure for the coal mining machine comprises a first loam core, a first stand column assembly, a dead head, a second loam core and a second stand column assembly, the dead head is located on the upper surface of the second loam core or the outer surface of the first stand column assembly, and the first loam core is located in a through hole of the first stand column assembly. The first stand column assembly is arranged on the upper surface of the second loam core through the first hot spot assembly, and the second stand column assembly is located on the lower surface of the second loam core. The planet carrier casting structure for the coal mining machine is simple in structure, the first chilling block located on the outer surface of the first stand column assembly or the second chilling block located below the second stand column assembly is beneficial for enhancing the cooling effect and improving the metallographic structure, and the temperature of molten steel making contact with the planet carrier casting structure can be reduced during mold filling. Molten steel enters the cavity from bottom to top, so that the impact force of the molten steel on the cavity is reduced, and the defects of sand inclusion, sand burning and the like caused by the impact of the molten steel are reduced.

Description

Technical Field

[0001] The utility model relates to a casting process, in particular to a planetary frame casting structure for a coal mining machine and a pouring component thereof. Background Art

[0002] Casting is the process of pouring molten metal into a mold and allowing it to cool and solidify to achieve the desired shape and performance. However, due to its complex structure, planetary carriers often experience casting defects such as porosity, shrinkage cavities, and cracks in hot spots during the casting process. These defects significantly impact casting quality, precision, cost, and automation. Summary of the Invention

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a planetary carrier casting structure for a coal mining machine, which reduces internal structural defects and improves casting quality.

[0004] The utility model provides a planetary carrier casting structure for a coal mining machine, comprising a first mud core, a first column assembly, a riser, a second mud core and a second column assembly, the riser being located on the upper surface of the second mud core or the outer surface of the first column assembly, the first mud core being located in a through hole of the first column assembly, the first column assembly being arranged on the upper surface of the second mud core through a first hot node assembly, and the second column assembly being located on the lower surface of the second mud core.

[0005] Furthermore, it also includes a first chill and a second chill, the first chill is located on the outer surface of the first column assembly, and the second chill is located on the lower surface of the second column assembly.

[0006] Furthermore, the riser is a hollow cylinder, and a static pressure head is provided on the top of the riser.

[0007] Furthermore, the cylindrical height of the riser is greater than or equal to 300 mm.

[0008] Furthermore, the invention comprises two or more risers, at least one of which is located on the upper surface of the first mud core and at least one of which is located on the outer surface of the first column assembly. Preferably, the top of the riser located on the outer surface of the first column assembly is higher than the top of the first column assembly.

[0009] Furthermore, the second mud core is a block structure and includes a plurality of channels.

[0010] Furthermore, the first heat node component is a step structure.

[0011] Furthermore, the first column assembly and the second column assembly are both hollow cylindrical structures.

[0012] Furthermore, the diameter of the cross section of the second column assembly is greater than the diameter of the cross section of the first column assembly, and the height of the second column assembly is less than the height of the first column assembly.

[0013] The utility model also provides a casting assembly, including a straight runner, a cross runner and an ingrown runner, wherein the straight runner and the cross runner are perpendicular to each other, one end of the ingrown runner is connected to the straight runner or the cross runner, and the other end is connected to the riser, and the molten steel passes through the ingrown runner from bottom to top and then enters the mold cavity.

[0014] Furthermore, an ingate is provided between the riser and the ingode, and the molten steel enters the mold cavity through the ingate and the riser.

[0015] Furthermore, a gate cavity is provided at the connection between the ingrowth and the ingate.

[0016] Furthermore, the ratio of the cross-sectional areas of the sprue, the runner, and the ingrate is 1:1.2:1.5.

[0017] In summary, in the present application, the first chill or the second chill helps to enhance the cooling effect, improve the metallographic structure, and can also reduce the temperature of the molten steel in contact during mold filling. The static pressure head at the top of the riser helps the molten steel to shrink in advance, minimize the shrinkage of the casting after solidification, and can also overflow to collect some of the cold and dirty molten steel in the early stage. A bottom-pouring pouring assembly is adopted to allow the molten steel to enter the mold cavity from bottom to top, reducing the impact force of the molten steel on the mold cavity and reducing defects such as sand inclusion and sand sticking caused by the impact of the molten steel. In addition, by setting the cross-sectional area of ​​the sprue, runner and ingrow, it is ensured that the molten steel can be filled in a large flow and stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model shows a structural diagram of the planetary carrier casting structure for a coal mining machine.

[0019] Figure 2 The structure diagram of the planet carrier of the present invention is shown.

[0020] Component number description

[0021] 100- Planetary carrier casting structure for coal mining machine

[0022] 01-First mud core

[0023] 02-First Cold Iron

[0024] 03-Riser

[0025] 031–static head

[0026] 032–Ingate

[0027] 04-Second mud core

[0028] 05-Second cold iron

[0029] 06-First column assembly

[0030] 061-First pillar

[0031] 07-First heat section assembly

[0032] 071–First Hot Section

[0033] 08-Second column assembly

[0034] 081-Second pillar

[0035] 09-Pouring components

[0036] 091-Sprue

[0037] 092-Horizontal runner

[0038] 093-Introduction

[0039] 010–The third pillar DETAILED DESCRIPTION

[0040] The following describes the implementation of the present invention through specific embodiments. People familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0041] See also Figures 1 to 2 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of this utility model. Therefore, they have no substantive technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by this utility model without affecting the efficacy and purpose that can be achieved by this utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of this utility model. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of this utility model without substantially changing the technical content.

[0042] like Figure 1 and Figure 2As shown, a planetary carrier casting structure 100 for a coal mining machine includes a first clay core 01, a first column assembly 06, a first chill 02, a riser 03, a second clay core 04, a second chill 05, and a second column assembly 08. The second clay core 04 is a block-shaped structure, and the riser 03 is located on the upper surface of the second clay core 04 or the outer surface of the first column assembly. The first chill 02 is located outside the first column assembly 06, and the first column assembly 06 is fixed to the upper surface of the second clay core 04 via a first hot node assembly 07. The first column assembly 06 is a hollow cylindrical structure with a through hole in the first column assembly 06. The first clay core 01 is located in the through hole of the first column assembly 06. After molten steel is poured into the first column assembly 06, the first column 061 of the planetary carrier is formed. The second column assembly 08 is located on the lower surface of the second clay core 04. The second column assembly 08 is a hollow cylindrical structure. The cross-sectional diameter of the second column assembly 08 is greater than the cross-sectional diameter of the first column assembly 06. The height of the second column assembly 08 is less than the height of the first column assembly 06. After molten steel is poured into the second column assembly 08, the second column 081 of the planetary carrier is formed.

[0043] The first hot-spot assembly 07 has a stepped structure. After molten steel is poured, the interior of the first hot-spot assembly 07 forms the planet carrier's first hot-spot 071. Similarly, a second hot-spot assembly (not shown) is positioned between the second column assembly 08 and the second clay core 04. This second hot-spot assembly has a stepped structure. After molten steel is poured, it forms the planet carrier's second hot-spot.

[0044] In another embodiment, two or more first chills 02 are further included and are equidistantly arranged on the outside of the first column assembly 06. A second chill 05 is further included and is located on the lower surface of the second column assembly 08.

[0045] In another embodiment, two or more risers 03 are further included, located outside the first hot segment assembly 07 or the second hot segment assembly. Specifically, at least one riser is located on the upper surface of the first chill 02, and at least one riser is located on the outer surface of the first column assembly 06. Preferably, the riser height is greater than or equal to 300 mm. A static pressure head 031 is also provided at the top of the riser, which not only facilitates liquid shrinkage feeding of the casting but also allows for overflow to collect some of the previously cold, dirty molten steel.

[0046] The second mud core 04 includes a plurality of channels, the shape and size of the channels match the shape and size of the third column 010 of the planetary carrier. After molten steel is poured into the channels of the second mud core 04, the third column 010 of the planetary carrier is formed.

[0047] The planetary carrier casting structure 100 for a coal mining machine of the present application has a simple structure. The first or second chiller helps enhance the cooling effect, improves the metallographic structure, and can also reduce the temperature of the molten steel in contact during mold filling. The static pressure head at the top of the riser helps to advance the liquid shrinkage of the molten steel, minimizing the shrinkage of the casting after solidification. It also allows overflow to collect some of the cold and dirty molten steel.

[0048] The planetary carrier casting structure 100 for coal mining machines also includes a pouring assembly 09, including a sprue 091, a runner 092 and two or more ingates 093. The sprue 091 and the runner 092 are perpendicular to each other and are used to transfer molten steel in the vertical or horizontal direction. One end of the ingate 093 is connected to the sprue 091 or the runner 092, and the other end is connected to the riser 03, and then the molten steel of the sprue 091 or the runner 092 is transferred to other parts that need to be cast through the riser 03. The pouring assembly is designed to be bottom pouring type, and the ingate 032 is set at the bottom of the riser 03. The molten steel enters the riser 03 through the ingate 032 from bottom to top in the F direction, and then enters the mold cavity, which helps to reduce the impact force of the molten steel on the mold cavity and reduce defects such as sand inclusion and sand sticking caused by the impact of the molten steel.

[0049] In another embodiment, a gate cavity is provided at the connection between the inner runner 093 and the inner gate 032, which helps to slow down the speed of molten steel filling and has a slag blocking effect.

[0050] In a preferred embodiment, the cross-sectional area ratio of sprue 0911, runner 0912, and ingates 093 is 1:1.2:1.5, ensuring high molten steel flow and smooth mold filling. The length of ingates 093 is less than or equal to 500 mm, and sufficient filling space around ingates 093 reduces collision with the sand mold, ensuring smooth molten steel filling and improving the shrinkage feeding capability of the riser. Molten steel enters the mold cavity through the bottom of the riser.

[0051] This application uses a bottom-pouring pouring assembly to allow molten steel to enter the mold cavity from the bottom up, reducing the impact force of the molten steel on the mold cavity and reducing defects such as sand inclusion and sticking caused by the impact of the molten steel. In addition, by setting the cross-sectional area of ​​the sprue, runner, and ingates, it ensures that the molten steel can flow smoothly and fill the mold at a large flow rate.

[0052] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A planetary carrier casting structure for a coal mining machine, characterized in that: The invention comprises a first mud core, a first column assembly, a riser, a second mud core and a second column assembly, wherein the riser is located on the upper surface of the second mud core or the outer surface of the first column assembly, the first mud core is located in the through hole of the first column assembly, the first column assembly is arranged on the upper surface of the second mud core through a first heat node assembly, and the second column assembly is located on the lower surface of the second mud core.

2. The planetary carrier casting structure for a coal mining machine according to claim 1, characterized in that: It also includes a first chill and a second chill, wherein the first chill is located on the outer surface of the first column assembly, and the second chill is located on the lower surface of the second column assembly.

3. The planetary carrier casting structure for a coal mining machine according to claim 1, characterized in that: The riser is a hollow cylinder, and a static pressure head is provided on the top of the riser.

4. The planetary carrier casting structure for a coal mining machine according to claim 3, characterized in that: The cylindrical height of the riser is greater than or equal to 300 mm.

5. The planetary carrier casting structure for a coal mining machine according to claim 1, characterized in that: It comprises two or more risers, at least one of which is located on the upper surface of the first mud core, and at least one of which is located on the outer surface of the first column assembly.

6. The planetary carrier casting structure for a coal mining machine according to claim 5, characterized in that: The top of the riser located on the outer surface of the first column component is higher than the top of the first column component.

7. The planetary carrier casting structure for a coal mining machine according to claim 1, characterized in that: The second mud core is a block structure and includes a plurality of channels therein.

8. The planetary carrier casting structure for a coal mining machine according to claim 1, characterized in that: The first heat node component is a step structure.

9. The planetary carrier casting structure for a coal mining machine according to claim 1, characterized in that: The first column assembly and the second column assembly are both hollow cylindrical structures.

10. The planetary carrier casting structure for a coal mining machine according to claim 1, characterized in that: The diameter of the cross section of the second column component is greater than the diameter of the cross section of the first column component, and the height of the second column component is less than the height of the first column component.

11. The planetary carrier casting structure for a coal mining machine according to claim 1, characterized in that: It also includes a casting assembly, including a straight runner, a cross runner and an ingrown runner, wherein the straight runner and the cross runner are perpendicular to each other, one end of the ingrown runner is connected to the straight runner or the cross runner, and the other end is connected to the riser, and the molten steel passes through the ingrown runner from bottom to top and then enters the mold cavity.

12. The planetary carrier casting structure for a coal mining machine according to claim 11, characterized in that: An ingate is provided between the riser and the ingode, and the molten steel enters the mold cavity through the ingate and the riser.

13. The planetary carrier casting structure for a coal mining machine according to claim 12, characterized in that: A gate cavity is provided at the connection between the ingrown channel and the ingrate.

14. The planetary carrier casting structure for a coal mining machine according to claim 11, wherein: The ratio of the cross-sectional areas of the sprue, the runner and the ingrown runner is 1:1.2:1.5.

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