CN220805420U - Needle gear shell casting pouring system for RV speed reducer - Google Patents
Needle gear shell casting pouring system for RV speed reducer Download PDFInfo
- Publication number
- CN220805420U CN220805420U CN202322675016.XU CN202322675016U CN220805420U CN 220805420 U CN220805420 U CN 220805420U CN 202322675016 U CN202322675016 U CN 202322675016U CN 220805420 U CN220805420 U CN 220805420U
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- CN
- China
- Prior art keywords
- casting
- pouring
- runner
- head
- pin
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- 238000005266 casting Methods 0.000 title claims abstract description 56
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 14
- 238000001816 cooling Methods 0.000 abstract description 11
- 229910000859 α-Fe Inorganic materials 0.000 abstract description 10
- 238000005204 segregation Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 229910001141 Ductile iron Inorganic materials 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910001562 pearlite Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The utility model provides a needle gear shell foundry goods gating system for RV speed reducer, belongs to nodular cast iron casting pouring technology field, solves the technical problem that the department hypereutectic area or banded ferrite district defect appear in the casting in-process in the runner area in the dead head root, and the solution is: needle gear shell casting pouring system for RV speed reducer, wherein: the middle part of the top surface of the pin-tooth shell casting is provided with a casting head, the circumferential direction of the bottom of the casting head is uniformly provided with a plurality of cross runners, and the circumferential direction of the inner wall of the top of the pin-tooth shell casting is provided with a plurality of inner gates which are in one-to-one correspondence with the cross runners; one end of the transverse runner is communicated with the bottom of the casting head, and the other end of the transverse runner is communicated with the corresponding inner pouring gate; and pouring gate patch is arranged between adjacent transverse pouring gates. According to the utility model, through adjusting the structure of the pouring system, the cooling temperature curves of the casting and the pouring system tend to be consistent, and the problems of local hypereutectic and ferrite segregation of the casting caused by the cooling curves are effectively alleviated.
Description
Technical Field
The utility model relates to the technical field of ductile iron casting pouring processes, in particular to a pin gear housing casting pouring system for an RV speed reducer.
Background
RV reducer is composed of cycloidal pin gear and planetary support, and is widely applied to the fields of industrial robot, medical treatment, satellite receiving system, etc. because of the advantages of small volume, strong impact resistance, high positioning accuracy, large reduction ratio, etc.
The core casting 'pin gear housing' of the RV reducer has extremely strict quality requirements, and the same casting matrix is not allowed to have the deviation of pearlite and ferrite proportion. The casting riser root (inner gate) is also an inlet for molten iron to enter, and because hot molten iron flows through the position, a flow field hot junction is formed, so that the cooling of the riser root (inner gate) area is delayed, a local hypereutectic area is formed (as shown in fig. 1), or a strip-shaped ferrite area is locally formed (as shown in fig. 2), and the pearlite volume of the local hypereutectic area or the strip-shaped ferrite area is often lower than a required value, so that the wear resistance of the area is obviously weakened, and the quality of a speed reducer is influenced.
Disclosure of Invention
The utility model mainly aims to overcome the defects in the prior art, improve the quality of pin-tooth shell castings, solve the technical problem that a part hypereutectic region or a strip-shaped ferrite region appears in a riser root (inner gate) region in the casting process, and provide a pin-tooth shell casting pouring system for an RV speed reducer.
In order to achieve the aim of the utility model, the utility model adopts the following technical scheme:
Needle gear shell casting pouring system for RV speed reducer, wherein: the middle part of the top surface of the pin-tooth shell casting is provided with a casting head, the circumferential direction of the bottom of the casting head is uniformly provided with a plurality of cross runners, and the circumferential direction of the inner wall of the top of the pin-tooth shell casting is provided with a plurality of inner gates which are in one-to-one correspondence with the cross runners; one end of the transverse runner is communicated with the bottom of the casting head, and the other end of the transverse runner is communicated with the corresponding inner pouring gate;
and pouring gate patch is arranged between adjacent transverse pouring gates.
Furthermore, a necking is arranged at the bottom of the casting head at the position close to the cross gate.
Further, the cross-sectional area of the runner near the in-gate is smaller than the cross-sectional area of the runner near the riser.
Compared with the prior art, the utility model has the beneficial effects that:
According to the technical scheme, the pouring head is provided with the transverse pouring channels in the circumferential direction at the bottom, so that the hot junctions generated by the pouring flow field are dispersed, and the condition of inconsistent cooling curves caused by the flow field is relieved; the pouring gate patch balances the cooling temperature among a plurality of pouring gates; and the design of two-in-one of the pouring gate and the riser simplifies the process.
According to the utility model, through adjusting the structure of the pouring system, the cooling temperature curves of the casting and the pouring system tend to be consistent, and the problems of local hypereutectic and ferrite segregation of the casting caused by the cooling curves are effectively alleviated.
Drawings
FIG. 1 is a hypereutectic metallographic structure;
FIG. 2 is a diagram of a ferrite segregation metallographic structure;
FIG. 3 is a metallographic structure diagram of a casting riser root (in-gate) region after the process is adopted;
FIG. 4 is a schematic diagram of the casting system of the present utility model;
FIG. 5 is a cross-sectional view of FIG. 4;
FIG. 6 is a casting process temperature profile of a prior art casting system;
FIG. 7 is a casting process temperature profile of the casting system of the present utility model.
In the figure, 1 is a casting head, 2 is a cross gate, 3 is an in-gate, 4 is a pouring gate patch, and 5 is a pin gear shell casting.
Detailed Description
The utility model is described in further detail below with reference to fig. 1 to 7.
Needle gear shell casting pouring system for RV speed reducer, wherein: the middle part of the top surface of the pin-tooth shell casting 5 is provided with a casting head 1, the circumferential direction of the bottom of the casting head 1 is uniformly provided with a plurality of cross runners 2, and the circumferential direction of the inner wall of the top of the pin-tooth shell casting 5 is provided with a plurality of inner gates 3 which are in one-to-one correspondence with the cross runners 2; one end of the transverse runner 2 is communicated with the bottom of the casting head 1, and the other end of the transverse runner is communicated with the corresponding inner pouring gate 3;
The arrangement of the transverse pouring channels 2 and the inner pouring channels 3 can disperse hot junctions generated by the pouring flow field, alleviate inconsistent cooling curves caused by the flow field, and avoid the problems of local hypereutectic and ferrite segregation of castings.
And a pouring gate patch 4 is arranged between the adjacent transverse pouring gates 2, so that the cooling temperature of the pouring gates is balanced, the cooling temperature curves of the casting and the pouring system tend to be consistent, and the problems of local hypereutectic and ferrite segregation of the casting caused by the cooling curves are alleviated.
And a necking is arranged at the bottom of the casting head 1 and close to the position of the runner 2.
The cross-sectional area of runner 2 near header 3 is smaller than the cross-sectional area of runner 2 near riser 1.
The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present utility model should be included in the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.
Claims (3)
1. The utility model provides a needle gear shell foundry goods gating system for RV speed reducer which characterized in that: the middle part of the top surface of the pin-tooth shell casting (5) is provided with a casting head (1), the circumferential direction of the bottom of the casting head (1) is uniformly provided with a plurality of cross runners (2), and the circumferential direction of the inner wall of the top of the pin-tooth shell casting (5) is provided with a plurality of inner gates (3) which are in one-to-one correspondence with the cross runners (2); one end of the transverse runner (2) is communicated with the bottom of the casting head (1), and the other end of the transverse runner is communicated with the corresponding inner pouring gate (3);
and pouring gate patches (4) are arranged between the adjacent transverse pouring gates (2).
2. The pin gear housing casting pouring system for the RV reducer according to claim 1, wherein: and a necking is arranged at the bottom of the casting head (1) close to the position of the cross runner (2).
3. The pin gear housing casting pouring system for the RV reducer according to claim 1, wherein: the cross-sectional area of the cross runner (2) near the in-gate (3) is smaller than that of the cross runner (2) near the casting head (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322675016.XU CN220805420U (en) | 2023-10-07 | 2023-10-07 | Needle gear shell casting pouring system for RV speed reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322675016.XU CN220805420U (en) | 2023-10-07 | 2023-10-07 | Needle gear shell casting pouring system for RV speed reducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220805420U true CN220805420U (en) | 2024-04-19 |
Family
ID=90674023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322675016.XU Active CN220805420U (en) | 2023-10-07 | 2023-10-07 | Needle gear shell casting pouring system for RV speed reducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220805420U (en) |
-
2023
- 2023-10-07 CN CN202322675016.XU patent/CN220805420U/en active Active
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| GR01 | Patent grant |