Casting process model structure for feeding of small shaft hole differential shell

Abstract

The utility model provides a casting process model structure for feeding of a small-shaft-hole differential shell. The casting process model structure comprises a vertical pouring gate, a residue filtering device, a main pouring gate, a first branch pouring gate, a second branch pouring gate, a first water inlet piece, a second water inlet piece, a casting, a large-end shaft hole, a dead head, a heat preservation device and a small-end shaft hole extension section. According to the casting process model structure for feeding of the small shaft hole differential shell, the problems that the number of risers is large, the process yield is low, the production cost is high, the reject ratio is high, and the requirements of welding performance and mechanical performance cannot be met when existing equipment is used for feeding are solved; the method has the advantages of few dead heads, high process yield and low production cost.

Description

Technical Field

[0001] The utility model relates to the field of automobile parts production and processing, in particular to a casting process model structure for shrinkage compensation of a small shaft hole difference shell. Background Art

[0002] In the traditional foundry industry, factors such as product layout, number of mold cavities, sand core weight, number of cores used and assembly method, template utilization, and product quality are all crucial factors influencing a company's casting costs. Small-bore differential housings offer more dispersed heat buildup than traditional designs. Furthermore, the elimination of flanges and the shift from traditional welding or riveting assembly to welding impose higher requirements on internal defects and performance. Consequently, traditional processes require more risers for shrinkage feeding, resulting in low yields, high production costs, and a high defect rate. These factors fail to meet welding and mechanical performance requirements. Utility Model Content

[0003] The main purpose of the utility model is to propose a casting process model structure for small shaft hole differential shell shrinkage compensation, 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 shell shrinkage compensation with small shaft hole difference, comprising:

[0006] Vertical sprue, vertical setting;

[0007] A residue filtering device, one end of which is connected to the bottom side of the vertical pouring channel;

[0008] The main pouring channel is connected to the end of the slag filter device away from the vertical pouring channel;

[0009] A first branch runner and a second branch runner are connected to the first branch runner and the second branch runner respectively at positions near both ends of the side of the main runner away from the residue filtering device;

[0010] The first water inlet piece and the second water inlet piece are respectively connected to the side of the first branch runner and the second branch runner close to each other;

[0011] The casting is arranged between the first branch runner and the second branch runner, and the two sides of the casting are respectively connected to the first water inlet piece and the second water inlet piece;

[0012] The big end shaft hole is connected to the top of the casting and has a solid structure inside;

[0013] Riser, connected above the big end shaft hole;

[0014] A heat preservation device is provided in the oil groove of the bearing hole of the casting;

[0015] The extension of the small end shaft hole is located below the insulation device and connected to the casting.

[0016] Furthermore, the heat preservation device includes: a first petal heat preservation device, a second petal heat preservation device, a third petal heat preservation device and a fourth petal heat preservation device which are connected end to end in sequence.

[0017] Furthermore, a small end shaft hole tapered groove is provided inside the small end shaft hole extension section.

[0018] Furthermore, the slope of the tapered groove of the small end shaft hole is 6°.

[0019] Furthermore, the vertical runner is a cylinder with a diameter of 40 mm and a height of 180 mm.

[0020] Furthermore, the length of the big end shaft hole is 38 mm.

[0021] Furthermore, the cross-sectional area of the main runner is 210 mm 2 .

[0022] Furthermore, a filter residue sheet is provided in the filter residue device.

[0023] Furthermore, the size of the filter residue piece is 50mm*50mm*10mm.

[0024] Furthermore, the length of the extended section of the small end shaft hole is 35 mm.

[0025] The utility model, a casting process model structure for feeding small shaft hole differential shells, solves the problems of existing equipment requiring multiple risers during feeding, resulting in low process yield, high production cost, high defect rate, and inability to meet welding performance and mechanical performance requirements. It has the advantages of using fewer risers, high process yield, and low production cost, eliminates internal defects in the product, improves welding performance, effectively avoids the impact of internal defects on welding, improves the mechanical and cutting performance of the product, increases the product's tool processing life, and reduces processing costs. In addition, the strength of the product is improved, so that the product can still meet the use requirements of product strength while reducing weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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:

[0027] Figure 1 The figure is a schematic diagram of the overall structure of a casting process model for shell shrinkage compensation with small shaft hole difference.

[0028] Figure 2The present invention provides multi-angle views and cross-sectional views of a casting process model for shell shrinkage compensation with small shaft hole difference.

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

[0030] 1. Vertical pouring channel; 2. Filter plate; 3. Main pouring channel; 4. First branch pouring channel; 5. Second branch pouring channel; 6. First water inlet plate; 7. Second water inlet plate; 8. Casting; 9. Riser; 10. Small end shaft hole extension section; 11. First petal insulation; 12. Second petal insulation; 13. Third petal insulation; 14. Fourth petal insulation; 15. Large end shaft hole; 16. Small end shaft hole tapered groove. 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 shell shrinkage compensation with small shaft hole difference, comprising:

[0035] Vertical sprue 1: The vertical sprue 1 is a cylinder with a diameter of 40 mm and a height of 180 mm, and is set vertically;

[0036] The residue filtering device 2 has one end connected to one side of the bottom of the vertical pouring channel 1 , and a residue filtering sheet is provided in the residue filtering device 2 .

[0037] In a preferred embodiment, the filter residue sheet has a size of 50*50*10 mm.

[0038] The main runner 3 is connected to one end of the filter residue piece 2 away from the vertical runner 1 , and the main runner is connected to the water outlet position of the filter residue device 2 .

[0039] In a preferred embodiment, the cross-sectional area of the main runner 3 is 210 mm 2

[0040] The first branch runner 4 and the second branch runner 5 are connected to the first branch runner 4 and the second branch runner 5 respectively at positions close to both ends of the side of the main runner 3 away from the filter residue sheet 2.

[0041] The length of the main runner 3 is greater than the distance between the first branch runner 4 and the second branch runner 5. Both ends of the main runner 3 protrude from the connection position, playing the role of slag collection and slow flow.

[0042] In a preferred embodiment, the cross-sectional area of the first branch runner 4 and the second branch runner 5 is 105 mm 2 .

[0043] The first and second branch runners 4 and 5 are connected to each other on one side thereof where the first and second branch runners 4 and 5 are close to each other, with a first water inlet piece 6 and a second water inlet piece 7 being connected to each other.

[0044] In a preferred embodiment, the first water inlet piece 6 and the second water inlet piece 7 protrude from the connection position with the first branch runner 4 and the second branch runner 5 respectively, playing the role of slag collection and slow flow. The cross-sectional area of the first water inlet piece 6 and the second water inlet piece 7 is 80mm 2 .

[0045] The casting 8 is arranged between the first branch runner 4 and the second branch runner 5, and its two sides are respectively connected to the first water inlet piece 6 and the second water inlet piece 7;

[0046] The big end shaft hole 15 is connected to the top of the casting 8 and has a solid structure inside.

[0047] In a preferred embodiment, the length of the big end shaft hole 15 is 38 mm.

[0048] Riser 9, connected above the big end shaft hole 15;

[0049] A heat preservation device is provided in the oil groove of the bearing hole of the casting 8;

[0050] The heat-insulating device comprises: a first petal heat-insulating device 11, a second petal heat-insulating device 12, a third petal heat-insulating device 13 and a fourth petal heat-insulating device 14 which are connected in sequence end to end.

[0051] The big end shaft hole 15 and the petal insulation serve as a feeding channel, and are a locking bridge between the bearing installation area and the welding area. The riser 9 is a feeding tool.

[0052] The small end shaft hole extension section 10 is located below the heat preservation device and is connected to the casting 8.

[0053] In a preferred embodiment, the length of the small end shaft hole extension section 10 is 35 mm.

[0054] A small end shaft hole tapered groove 16 is provided inside the small end shaft hole extension section 10 .

[0055] In a preferred embodiment, the slope of the tapered groove 16 of the small end shaft hole is 6°

[0056] The tapered groove 16 of the small end shaft hole and the small end shaft hole extension section 10 play the role of changing the thermal junction, which can lead the defects inside the casting to the small end shaft hole extension section 10, thereby achieving the purpose of eliminating shrinkage cavities and ensuring product quality.

[0057] The workflow of a casting process model structure for shell shrinkage compensation with small shaft hole difference is as follows:

[0058] The process model structure forms a sand model cavity. The molten iron flows into the filter plate at the bottom through the vertical runner, which filters out most of the impurities in the molten iron and slows down the flow rate of the molten iron. The molten iron enters the main runner 3 through the outlet of the filter plate, and is then diverted from the main runner 3 to the first branch runner 4 and the second branch runner 5. When the molten iron flows through the main runner 3 and the branch runner, it will undergo two slag collection and slow flow processes, and finally enter the casting 8 through the first water inlet plate 6 and the second water inlet plate 7. After the molten iron enters the casting 8, it continues to fill from bottom to top, first filling the small end shaft hole extension section 10, the small shaft hole, the main body, the welding area, and the large end shaft hole 15. Finally, the riser 9 is filled. The riser 9 is located at the top, and the static pressure of the molten iron at the top riser increases the shrinkage compensation capacity of the riser 9.

[0059] In this application:

[0060] (1) The 15-hole of the big end shaft is added with a heat preservation structure, a shrinkage channel is added between the bearing assembly area and the welding area, and the inner diameter of the shaft hole is changed to a tapered shape, which will be removed later by drilling process.

[0061] (2) A riser 9 is provided at the top of the shaft hole to improve the shrinkage compensation efficiency of the riser 9 and avoid excessive provision of risers 9 as a whole.

[0062] (3) A small end shaft extension section 10 is provided, and a broken tapered groove is designed on the inner side. The heat junction position of the small end shaft hole is changed by this structure, and an easy-to-cut structure is used, which can be removed by sawing.

[0063] (4) This structure has a wide range of applications and can be horizontally extended to differential cases that are lightweight, have high strength requirements, have high internal defect requirements, have high welding performance requirements, and have good cutting performance.

[0064] (5) This structure can reduce the production cost of similar products and improve product performance.

[0065] 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.

[0066] 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.

[0067] 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 small shaft hole difference shell shrinkage compensation, characterized in that: include: A vertical sprue (1) is provided vertically; A residue filtering device (2), one end of which is connected to one side of the bottom of the vertical pouring channel (1); A main pouring channel (3) is connected to an end of the residue filtering device (2) away from the vertical pouring channel (1); A first branch runner (4) and a second branch runner (5), wherein the first branch runner (4) and the second branch runner (5) are respectively connected to positions near both ends of the main runner (3) away from the residue filtering device (2); A first water inlet plate (6) and a second water inlet plate (7) are respectively connected to the sides of the first branch runner (4) and the second branch runner (5) that are close to each other; A casting (8), the casting (8) being arranged between the first branch runner (4) and the second branch runner (5), and having two sides connected to the first water inlet piece (6) and the second water inlet piece (7) respectively; The large end shaft hole (15) is connected to the upper side of the casting (8) and has a solid structure inside; A riser (9) connected above the large end shaft hole (15); A heat preservation device is arranged in the oil groove of the bearing hole of the casting (8); The small end shaft hole extension section (10) is located below the heat preservation device and is connected to the casting (8).

2. A casting process model structure for shrinkage compensation of a small axial hole difference shell according to claim 1, characterized in that: The heat preservation device comprises: a first petal heat preservation device (11), a second petal heat preservation device (12), a third petal heat preservation device (13) and a fourth petal heat preservation device (14) which are sequentially connected end to end.

3. A casting process model structure for shrinkage compensation of a small axial hole difference shell according to claim 1, characterized in that: A small end shaft hole tapered groove (16) is provided inside the small end shaft hole extension section (10).

4. A casting process model structure for feeding the shell with small axial hole difference according to claim 3, characterized in that: The slope of the tapered groove (16) of the small end shaft hole is 6°.

5. The casting process model structure for feeding the shell with small axial hole difference according to claim 1 is characterized in that: The vertical pouring channel (1) is a cylinder with a diameter of 40 mm and a height of 180 mm.

6. A casting process model structure for feeding the shell with small axial hole difference according to claim 1, characterized in that: The length of the large end shaft hole is 38 mm.

7. The casting process model structure for feeding the small axial hole difference shell according to claim 1 is characterized in that: The cross-sectional area of the main runner (3) is 210 mm 2 .

8. The casting process model structure for feeding the small axial hole difference shell according to claim 3 is characterized in that: A filter residue sheet is provided in the filter residue device (2).

9. A casting process model structure for feeding the shell with small axial hole difference according to claim 8, characterized in that: The size of the filter residue piece is 50mm*50mm*10mm.

10. The casting process model structure for feeding the shell with small axial hole difference according to claim 1, characterized in that: The length of the small end shaft hole extension section (10) is 35 mm.

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