CN221289474U - Low-pressure casting die for planetary gear carrier - Google Patents
Low-pressure casting die for planetary gear carrier Download PDFInfo
- Publication number
- CN221289474U CN221289474U CN202323184428.XU CN202323184428U CN221289474U CN 221289474 U CN221289474 U CN 221289474U CN 202323184428 U CN202323184428 U CN 202323184428U CN 221289474 U CN221289474 U CN 221289474U
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- Prior art keywords
- casting
- die
- planetary gear
- cavity
- movable
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- 238000005266 casting Methods 0.000 title claims abstract description 82
- 239000007788 liquid Substances 0.000 claims abstract description 30
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 210000002489 tectorial membrane Anatomy 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 abstract description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 15
- 238000007711 solidification Methods 0.000 abstract description 2
- 230000008023 solidification Effects 0.000 abstract description 2
- 230000007547 defect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 238000010079 rubber tapping Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
A low-pressure casting die for a planetary gear carrier is mainly used for casting the planetary gear carrier. A hole site precast pin is arranged on the movable die, a casting cavity is formed in the fixed die and the movable die after the fixed die and the movable die are matched, and the shape of the casting cavity is consistent with that of the planetary gear support; the bottom of the fixed die is provided with a liquid lifting port communicated with the casting cavity, a sand core is arranged in the casting cavity above the liquid lifting port, the sand core is provided with a body for forming the shape of the thick and large support column of the planetary gear support, the sand core is positioned by a positioning boss at the bottom of the sand core and a positioning groove on the fixed die, and the sand core is fixed by the die assembly of the movable die. The utility model can ensure the fluidity of the aluminum liquid, so that the support column has the feeding of the aluminum liquid under the action of pressure; through sequential solidification, the defect-free inside of the thick and large support column of the planet gear support is ensured; the gas generated by the precoated sand core and the gas of the die cavity can be effectively discharged through negative pressure air suction; the shrinkage cavity risk in the hole can be effectively reduced by adopting the mode of pre-casting the hole by the pre-casting pin.
Description
Technical Field
The utility model relates to the technical field of casting, in particular to a low-pressure casting die for forming a planetary gear carrier.
Background
The planet gear carrier has a plurality of thick and large support columns in the inner cavity, and is usually manufactured in a casting mode. The existing casting mould is a gravity metal mould, the mould adopts gravity bottom pouring type pouring, the aluminum liquid is introduced into the casting by virtue of a vertical sprue, the casting mode relies on self gravity circulation of the aluminum liquid, and after the aluminum liquid flows onto a bottom plane, the position of a thick and large support column in the inner cavity of the planetary gear support cannot be fed, so that shrinkage porosity can occur at the thick and large position; meanwhile, when the molten aluminum flows to a plurality of hole sites on the upper part of the casting, good appearance molding is easy to occur, but defects can be generated after reaming and tapping.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model aims to provide a low-pressure casting die for a planet gear carrier, so as to improve the casting quality of a support column on the planet gear carrier and avoid defects after the upper hole is processed.
In order to achieve the aim of the utility model, the die mainly comprises a fixed die arranged on casting equipment, a movable die driven to move by the casting equipment and an ejection mechanism, wherein the movable die is arranged above the fixed die; a hole site precast pin corresponding to the hole of the planetary gear support is arranged on the movable mould; a casting cavity for casting the planetary gear support is formed in the fixed die and the movable die after the fixed die and the movable die are matched, and the shape of the casting cavity is consistent with that of the planetary gear support; the bottom of cover half is provided with the liquid mouth that rises with casting die cavity intercommunication, is provided with the psammitolite in the casting die cavity of liquid mouth top position rises, the psammitolite is circular structure, and the psammitolite is equipped with the physique that is used for shaping planetary gear support thick big support column shape, and the psammitolite adopts tectorial membrane psammitolite, fixes a position with the positioning groove on the cover half through the location boss of psammitolite bottom, and the compound die of rethread movable mould is fixed the psammitolite.
Further, a plurality of exhaust channels communicated with the casting cavity are uniformly distributed on the movable mould; a plurality of negative pressure air suction channels communicated with the casting cavity are uniformly distributed on the fixed die.
Further, mould locating pins are symmetrically arranged at four corners of the bottom of the fixed mould, and mould locating pin holes matched with the mould locating pins are formed in the movable mould.
Further, the top of movable mould is provided with the ejection mechanism that ejects the foundry goods from the mould, ejection mechanism drives the motion through casting equipment, ejection mechanism include with casting equipment fixed connection's roof and pass the movable mould and be used for ejecting ejector pin in the mould with the foundry goods, be provided with on the movable mould with ejector pin assorted through-hole, the ejector pin is a plurality of, and ejector pin passes through ejector pin fixed plate and roof fixed connection at top.
Compared with the prior art, the utility model adopts the liquid filling from the liquid lifting port at the bottom of the fixed die, the planetary gear support is molded under pressure, and meanwhile, a precoated sand core which can play a role in heat preservation of aluminum liquid is placed in the casting cavity above the liquid lifting port, so that the mobility of the aluminum liquid can be ensured, and the support column has aluminum liquid feeding under the pressure effect; simultaneously, aluminum liquid starts to fill from the bottom, the casting sequence spreads from a liquid lifting port to a round window at the bottom of the casting and along the bottom to the periphery, and flows upwards from an inclined plane after flowing to a corner, so that sequential solidification is realized, and the defect-free inside a thick and large support column of the planetary gear support is ensured; after the mold filling is completed, opening negative pressure air suction of the fixed mold, and effectively discharging gas generated by the precoated sand core and gas of the mold cavity through the negative pressure air suction; the ring hole at the upper part of the planetary gear bracket adopts a pre-cast pin pre-cast hole mode, so that the shrinkage porosity risk in the hole can be effectively reduced, and the effect of no defect after reaming and tapping is achieved; after the fixed die and the movable die are clamped, the die positioning pins and the positioning holes are used for clamping, positioning and fixing, so that waste products caused by the movement of the die due to the filling pressure during filling can be effectively prevented.
Drawings
Fig. 1 is a schematic view of a planetary gear carrier.
Fig. 2 is a side view of fig. 1.
FIG. 3 is a schematic view of section I-I of FIG. 2.
Fig. 4 is a schematic view of the structure of the present utility model.
Fig. 5 is a schematic view of the stationary mold of fig. 4.
Fig. 6 is a schematic diagram of the movable mold of fig. 4.
Fig. 7 is a schematic view of the ejector mechanism of fig. 4.
Fig. 8 is a schematic view of the sand core of fig. 4.
Fig. 9 is a top view of fig. 8.
Wherein: 1. a fixed mold; 2. a movable mold; 3. an ejection mechanism, 3-1, a top plate; 3-2, a mandril fixing plate; 3-3, a mandril; 4. a casting cavity; 5. an exhaust passage; 6. a negative pressure air extraction channel; 7. a liquid lifting port; 8. a sand core; 8-1, a shape; 9. positioning the boss; 10. a positioning groove; 11. a mold locating pin; 12. a die positioning pin hole; 13. hole site precast pins; 14. a planetary gear carrier; 14-1, support columns; 14-2, holes.
Detailed Description
As shown in fig. 1, 2, 3, 4, 5, 6, 7, 8 and 9, the utility model mainly comprises a fixed die 1 arranged on casting equipment, a movable die 2 driven to move by the casting equipment and an ejection mechanism 3, wherein the movable die 2 is arranged above the fixed die 1; the movable die 2 is provided with a hole site precast pin 13 corresponding to a circle of annular holes 14-2 at the upper part of the planetary gear carrier 14, and the hole site precast pin 13 can effectively reduce the shrinkage porosity risk in the holes 14-2 of the planetary gear carrier 14, so that the effects of reaming and tapping without defects are achieved; a casting cavity 4 for casting the planetary gear carrier 14 is formed in the fixed die 1 and the movable die 2 after the fixed die is matched with each other, and the shape of the casting cavity 4 is consistent with that of the planetary gear carrier 14; the bottom of cover half 1 is provided with the liquid mouth 7 that rises that communicates with casting die cavity 4, is provided with psammitolite 8 in the casting die cavity 4 of liquid mouth 7 top position, psammitolite 8 is circular structure, and psammitolite 8 is equipped with the physique 8-1 that is used for shaping the thick big support column 14-1 shape of planetary gear support 14, and psammitolite 8 adopts the tectorial membrane psammitolite, fixes a position with the constant head tank 10 on the cover half 1 through the location boss 9 of psammitolite 8 bottom, and the compound die of rethread movable mould 2 is fixed psammitolite 8, and the psammitolite 8 removes when preventing that the aluminium liquid from filling.
A plurality of exhaust channels 5 communicated with the casting cavity 4 are uniformly distributed on the movable mould 2, a plurality of negative pressure air suction channels 6 communicated with the casting cavity 4 are uniformly distributed on the fixed mould 1, and the exhaust channels 5 and the negative pressure air suction channels 6 are favorable for smoothly discharging gas in the casting cavity 4 through the exhaust channels 5 and the negative pressure air suction channels 6 during liquid filling, so that shrinkage cavity and defects of castings are prevented.
Mould positioning pins 11 are symmetrically arranged at four corners of the bottom of the fixed mould 1, and mould positioning pin holes 12 matched with the mould positioning pins 11 are arranged on the movable mould 2; the fixed die 1 and the movable die 2 can be fixed through the die positioning pins 11 when being clamped, and the waste products generated by the movement of the die due to the filling pressure during filling can be effectively prevented.
The upper part of the movable die 2 is provided with an ejection mechanism 3 for ejecting castings from the die, the ejection mechanism 3 is driven to move by casting equipment, the ejection mechanism 3 comprises a top plate 3-1 fixedly connected with the casting equipment and a push rod 3-3 penetrating through the movable die 2 and used for ejecting the castings from the die, the movable die 2 is provided with through holes matched with the push rod 3-3, the number of the push rods 3-3 is multiple, and the push rod 3-3 is fixedly connected with the top plate 3-1 through a push rod fixing plate 3-2 at the top.
When the planetary gear carrier 14 is subjected to low-pressure casting, the mold is preheated to 280-330 ℃, and then the coating is sprayed on the casting cavity 4; after a die cavity is opened through a low-pressure casting machine, a sand core 8 is firstly arranged, a movable die 2 and a fixed die 1 are used for die positioning through a die positioning pin 11, then die assembly and die filling are carried out, aluminum liquid enters a casting cavity 4 from a liquid lifting port 7 for die filling, and as the precoated sand core 8 placed in the casting cavity 4 has good heat preservation performance, the thick and large support column of the planetary gear support 14 can be ensured to have aluminum liquid feeding under the pressure effect; the aluminum liquid fills the casting cavity 4 from the liquid lifting opening 7, diffuses along the bottom to the periphery, flows to the corner and then flows upwards from the inclined plane until the aluminum liquid fills the whole casting cavity 4. The mold is filled from the bottom of the casting, the negative pressure of the fixed mold 1 is opened after the mold filling is completed, the gas generated by the precoated sand core 8 and the gas of the mold cavity can be effectively discharged from the mold exhaust channel 5 through the negative pressure air suction, and meanwhile, the mold filling is stable in low-pressure casting, so that the defects of air holes, slag inclusion and the like generated by the casting gas can be well avoided. Then the low-pressure casting machine pressurizes, pressure-maintaining and pressure-releasing the die, after the casting is solidified, the movable die 2 and the ejection mechanism 3 are driven by the low-pressure casting machine to rise upwards, after the movable die 2 reaches a certain position, the ejection mechanism 3 moves downwards to eject the casting from the die by using the ejector rod 303, and the casting of the planetary gear carrier 14 is completed.
Claims (4)
1. The utility model provides a planetary gear support low pressure casting mould which characterized in that: the mold comprises a fixed mold (1) arranged on casting equipment, a movable mold (2) driven to move by the casting equipment and an ejection mechanism (3), wherein the movable mold (2) is arranged above the fixed mold (1); a hole site precast pin (13) corresponding to the hole (14-2) of the planetary gear carrier (14) is arranged on the movable mould (2); a casting cavity (4) for casting the planetary gear carrier (14) is formed in the fixed die (1) and the movable die (2) after the fixed die is matched with the movable die, and the shape of the casting cavity (4) is consistent with that of the planetary gear carrier (14); the bottom of cover half (1) is provided with rises liquid mouth (7) with casting die cavity (4) intercommunication, is provided with psammitolite (8) in casting die cavity (4) of liquid mouth (7) upper position, psammitolite (8) are circular structure, and psammitolite (8) are equipped with body (8-1) that are used for shaping planetary gear support (14) thick big support column (14-1) shape, and psammitolite (8) adopt tectorial membrane psammitolite, and location boss (9) and cover half (1) on the bottom of psammitolite (8) are fixed a position through the compound die of die (2) with psammitolite (8).
2. The planetary gear carrier low-pressure casting die according to claim 1, wherein: a plurality of exhaust channels (5) communicated with the casting cavity (4) are uniformly distributed on the movable mould (2); a plurality of negative pressure air suction channels (6) communicated with the casting cavity (4) are uniformly distributed on the fixed die (1).
3. The planetary gear carrier low-pressure casting die according to claim 1, wherein: mould locating pins (11) are symmetrically arranged at four corners of the bottom of the fixed mould (1), and mould locating pin holes (12) matched with the mould locating pins (11) are formed in the movable mould (2).
4. The planetary gear carrier low-pressure casting die according to claim 1, wherein: the casting mold is characterized in that an ejection mechanism (3) for ejecting castings from the mold is arranged above the movable mold (2), the ejection mechanism (3) is driven to move through casting equipment, the ejection mechanism (3) comprises a top plate (3-1) fixedly connected with the casting equipment and an ejector rod (3-3) penetrating through the movable mold (2) and used for ejecting the castings from the mold, through holes matched with the ejector rod (3-3) are formed in the movable mold (2), the number of the ejector rods (3-3) is multiple, and the ejector rods (3-3) are fixedly connected with the top plate (3-1) through ejector rod fixing plates (3-2) at the top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323184428.XU CN221289474U (en) | 2023-11-24 | 2023-11-24 | Low-pressure casting die for planetary gear carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323184428.XU CN221289474U (en) | 2023-11-24 | 2023-11-24 | Low-pressure casting die for planetary gear carrier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221289474U true CN221289474U (en) | 2024-07-09 |
Family
ID=91746828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323184428.XU Active CN221289474U (en) | 2023-11-24 | 2023-11-24 | Low-pressure casting die for planetary gear carrier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221289474U (en) |
-
2023
- 2023-11-24 CN CN202323184428.XU patent/CN221289474U/en active Active
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |