CN219378919U - Die casting die for automobile gearbox shell - Google Patents
Die casting die for automobile gearbox shell Download PDFInfo
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- CN219378919U CN219378919U CN202222928169.6U CN202222928169U CN219378919U CN 219378919 U CN219378919 U CN 219378919U CN 202222928169 U CN202222928169 U CN 202222928169U CN 219378919 U CN219378919 U CN 219378919U
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- core
- pulling
- die
- seat
- sliding seat
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Abstract
The utility model relates to the field of automobile part manufacturing, and discloses a die casting die for an automobile gearbox shell; when the aluminum liquid in the die cavity is cooled to form a semi-solid casting, the extrusion driving mechanism drives the pressure head to extend to the surface of the casting through the push rod, the pressure head gradually extrudes the surface of the casting, not only gradually extrudes to form a threaded hole site, but also guides gas near the extrusion point to the threaded hole site, so that the generation of air holes on the surface of the casting is reduced, and the surface smoothness of the automobile gearbox shell is improved.
Description
Technical Field
The utility model relates to the field of automobile part manufacturing, in particular to a die casting die for an automobile gearbox shell.
Background
The automobile gearbox shell is an important part of the automobile gearbox, most of automobile parts are of special-shaped structures, the automobile parts are usually formed by processing through a die casting die, but the automobile gearbox shell is complex in structure and large in size, so that a runner in a cavity is long, cooling and solidifying speed of high-temperature aluminum liquid is high, when the aluminum liquid flows in a pouring gate, the temperature of the aluminum liquid is obviously reduced, pressure transmitted by a pressing chamber cannot be maintained until solidification of a casting is finished, in addition, the outside of the aluminum liquid is in contact with the surface of the die, so that the cooling speed of the outside is faster than that of the inside, a part of the casting which is finally solidified, namely a hot junction part of the casting is usually loose, and shrinkage phenomenon is often caused, and the quality of the product is affected. As shown in fig. 7, the area a of the housing of the gearbox of the automobile has more holes, and thus the air holes are more serious, in order to reduce the generation of the air holes, the extrusion mechanism is generally adopted to pressurize the aluminum liquid when the aluminum liquid is in a semi-solid state, namely, the extrusion rod is used to extrude the aluminum liquid, so that the generation of the air holes is reduced, but extrusion marks (such as pits) are left on the casting, and the improvement is necessary for further improving the quality of the casting; in fact, the automobile gearbox shell needs to be subjected to core pulling shaft processing to form core pulling hole sites during die casting, if the extrusion position can correspond to the core pulling hole sites, new defects of castings cannot be caused, and corresponding hole sites can be formed.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, it is an object of the present utility model to provide a die casting mold for an automotive transmission housing, which aims to not only reduce the generation of air holes on castings but also avoid the formation of new defects.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the die casting die comprises a movable die frame, a fixed die frame, a movable die core arranged on the movable die frame, a fixed die core arranged on the fixed die frame, a first core pulling mechanism, a second core pulling mechanism, a third core pulling mechanism and a fourth core pulling mechanism, wherein the first core pulling mechanism is used for carrying out core pulling molding on the side part of the automobile gearbox shell and comprises a first core pulling sliding seat and a first guide sliding seat fixedly arranged on the back of the first core pulling sliding seat, and a first driving mechanism used for driving the first core pulling sliding seat and the first guide sliding seat to synchronously move; the second core pulling mechanism comprises a second core pulling slide seat and a second guide slide seat fixedly arranged at the back of the second core pulling slide seat, and a second driving mechanism for driving the second core pulling slide seat and the second guide slide seat to synchronously move; the third core pulling mechanism comprises a third core pulling slide seat and a third guide slide seat fixedly arranged at the back of the third core pulling slide seat, and is used for driving the third core pulling slide seat and the third guide slide seat to synchronously move; the fourth core pulling mechanism comprises a fourth core pulling slide seat and a fourth guide slide seat fixedly arranged at the back of the fourth core pulling slide seat, and a fourth driving mechanism for driving the fourth core pulling slide seat and the fourth guide slide seat to synchronously move; the die comprises a fixed die core, a movable die core, a first core-pulling sliding seat, a second core-pulling sliding seat, a third core-pulling sliding seat and a fourth core-pulling sliding seat, wherein a die cavity is formed by combining the fixed die core, the casting nozzle is arranged on the fixed die core, a sleeve extending along the moving direction of the first core-pulling sliding seat, a push rod which is arranged in the sleeve and can slide relative to the sleeve are arranged in the first core-pulling sliding seat, one end of the push rod is connected with a pressure head, the other end of the push rod is connected with an extrusion driving mechanism through a transmission part, the extrusion driving mechanism drives the pressure head to extend out of the sleeve through the push rod, the pressure head is used for extruding a semi-solidified casting to form a threaded hole site, air bubbles around the threaded hole site are converged into the threaded hole site, and when the pressure head retracts into the sleeve, the pressure head is flush with the inner wall of the die cavity.
As a further improvement of the technical scheme, one end of the sleeve, which is close to the pressure head, is provided with a bevel connection, and one end of the sleeve, which is far away from the pressure head, is provided with a stop positioning head.
As a further improvement of the technical scheme, the pressure head is conical.
As a further improvement of the technical scheme, the extrusion driving mechanism is an oil cylinder, and the transmission part is a coupler.
As a further improvement of the technical scheme, a core pulling track is penetrated and arranged in the second core pulling slide seat and the second guiding slide seat, a fifth core pulling slide seat and a fifth guiding slide seat are arranged in the core pulling track, and the moving direction of the fifth core pulling slide seat and the moving direction of the second core pulling slide seat intersect to form an included angle.
As a further improvement of the technical scheme, a vertical plate is arranged on the back face of the second guide sliding seat, a guide rail for guiding the fifth guide sliding seat to slide is arranged on the vertical plate, and a fifth driving mechanism for driving the fifth guide sliding seat to slide is arranged on the vertical plate.
The beneficial effects are that:
compared with the prior art, the die casting die is used for processing and forming the automobile gearbox shell, when the aluminum liquid in the die cavity is cooled to form the semi-solid casting, the extrusion driving mechanism drives the pressure head to extend to the surface of the casting through the push rod, the pressure head gradually extrudes the surface of the casting, not only gradually extrudes to form a threaded hole site, but also guides gas near the extrusion point to the threaded hole site, so that the generation of air holes on the surface of the casting is reduced, and the surface smoothness of the automobile gearbox shell is improved.
Drawings
Fig. 1 is a perspective view of a die casting mold provided by the present utility model.
Fig. 2 is a schematic diagram of an internal structure of the die casting mold provided by the utility model.
Fig. 3 is a schematic view of the ram extending into the mold cavity.
Fig. 4 is a partial enlarged view of the L region in fig. 3.
Fig. 5 is an assembly view of the ram, sleeve, pushrod and transmission component.
Fig. 6 is a perspective view of the second core pulling mechanism, the fifth core pulling slide, the fifth guide slide and the fifth driving mechanism.
Fig. 7 is a perspective view of the transmission housing of the automobile.
Description of main reference numerals: 61-movable mould frame, 62-fixed mould frame, 63-movable mould core, 64-fixed mould core, 65-mould cavity, 1-first core pulling mechanism, 11-first core pulling slide seat, 12-first guide slide seat, 2-second core pulling mechanism, 21-second core pulling slide seat, 22-second guide slide seat, 23-second driving mechanism, 3-third core pulling mechanism, 31-third core pulling slide seat, 32-third guide slide seat, 4-fourth core pulling mechanism, 41-fourth core pulling slide seat, 42-fourth guide slide seat, 51-vertical plate, 52-fifth core pulling slide seat, 53-fifth guide slide seat, 54-guide rail, 55-fifth driving mechanism, 71-sleeve, 711-inclined port, 712-stop positioning head, 72-push rod, 73-press head, 74-transmission part, 8-automobile gearbox shell and 81-threaded hole site.
Detailed Description
The utility model provides a die casting die for an automobile gearbox housing 8, and the utility model is further described in detail below by referring to the accompanying drawings and examples for the purpose of making the purposes, the technical scheme and the effects of the utility model clearer and more definite. It should be understood that the detailed description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the utility model.
Referring to fig. 1-7, the present utility model provides a die casting mold for an automobile gearbox housing 8, including a movable mold frame 61, a fixed mold frame 62, a movable mold core 63 disposed on the movable mold frame 61, a fixed mold core 64 disposed on the fixed mold frame 62, a first core-pulling mechanism 1 for forming a side core of the automobile gearbox housing 8, a second core-pulling mechanism 2, a third core-pulling mechanism 3, and a fourth core-pulling mechanism 4, where the first core-pulling mechanism 1 includes a first core-pulling slide 11, a first guiding slide 12 fixed on the back of the first core-pulling slide 11, and a first driving mechanism for driving the first core-pulling slide 11 and the first guiding slide 12 to move synchronously; the second core-pulling mechanism 2 comprises a second core-pulling sliding seat 21 and a second guide sliding seat 22 fixedly arranged at the back of the second core-pulling sliding seat 21, and a second driving mechanism 23 for driving the second core-pulling sliding seat 21 and the second guide sliding seat 22 to synchronously move; the third core-pulling mechanism 3 comprises a third core-pulling sliding seat 31 and a third guide sliding seat 32 fixedly arranged at the back of the third core-pulling sliding seat 31, and a third driving mechanism for driving the third core-pulling sliding seat 31 and the third guide sliding seat 32 to synchronously move; the fourth core-pulling mechanism 4 comprises a fourth core-pulling sliding seat 41 and a fourth guiding sliding seat 42 fixedly arranged at the back of the fourth core-pulling sliding seat 41, and a fourth driving mechanism for driving the fourth core-pulling sliding seat 41 and the fourth guiding sliding seat 42 to synchronously move; the fixed die core 64, the movable die core 63, the first core-pulling sliding seat 11, the second core-pulling sliding seat 21, the third core-pulling sliding seat 31 and the fourth core-pulling sliding seat 41 are combined to form a die cavity 65, the casting nozzle is arranged on the fixed die core 64, a sleeve 71 extending along the moving direction of the first core-pulling sliding seat 11 and a push rod 72 which is arranged in the sleeve 71 and can slide relative to the sleeve 71 are arranged in the first core-pulling sliding seat 11 and 12, one end of the push rod 72 is connected with a pressing head 73, the other end of the push rod is connected with an extrusion driving mechanism through a transmission part 74, the extrusion driving mechanism drives the pressing head 73 to extend out of the sleeve 71 through the push rod 72, the pressing head 73 is used for extruding a semi-solidified casting to form a threaded hole position 81 and guiding bubbles around the threaded hole position 81 to be converged into the threaded hole position 81, and when the pressing head 73 retracts into the sleeve 71, the pressing head 73 is flush with the inner wall of the die cavity 65.
In die casting, the fixed die core 64 and the movable die core 63 are combined, the first driving mechanism drives the first core-pulling slide seat 11 and the second guiding slide seat 22 to move towards the center of the die, the second driving mechanism 23 drives the second core-pulling slide seat 21 and the second guiding slide seat 22 to move towards the center of the die, the third driving mechanism drives the third core-pulling slide seat 31 and the third guiding slide seat 32 to move towards the center of the die, the fourth driving mechanism drives the fourth core-pulling slide seat 41 and the fourth guiding slide seat 42 to move towards the center of the die, the fixed die core 64, the movable die core 63, the first core-pulling slide seat 11, the second core-pulling slide seat 21, the third core-pulling slide seat 31 and the fourth core-pulling slide seat 41 are combined to form a closed die cavity 65, when the pressure head 73 is retracted into the sleeve 71, the pressure head 73 is flush with the inner wall of the mold cavity 65, then molten aluminum is injected into the mold cavity 65 from a casting port and gradually fills the entire cavity under the action of pressure, and then the semi-solid casting is formed by cooling, at the moment, the pressure head 73 is driven by the extrusion driving mechanism to extend to the surface of the casting through the push rod 72, the surface of the casting is gradually extruded by the pressure head 73, so that a threaded hole site 81 is gradually extruded, and gas near the extrusion point is guided to the threaded hole site 81, so that the generation of air holes on the surface of the casting is reduced, and the surface smoothness of the automobile gearbox housing 8 is improved; after the casting is completely cooled, the extrusion driving mechanism drives the pressure head 73 to reset and withdraw through the push rod 72, and finally the movable mold core 63, the first core-pulling slide seat 11, the second core-pulling slide seat 21, the third core-pulling slide seat 31 and the fourth core-pulling slide seat 41 are reset, and the casting is dismounted through the mechanical arm.
It should be understood that the first core-pulling slide 11, the second core-pulling slide 21, the third core-pulling slide 31 and the fourth core-pulling slide 41 are all provided with a plurality of core-pulling shafts, and the core-pulling shafts are used for core-pulling and perforating the automobile gearbox housing 8, so that hole sites are formed on the automobile gearbox housing 8. It should be understood that the threaded hole 81 is not meant to be directly extruded by the ram 73 to form a threaded hole, and the ram 73 is extruded to form a blind hole, which is then tapped to form a threaded hole.
Specifically, the end of the sleeve 71 near the ram 73 is provided with a bevel 711 to ensure that the sleeve 71 is engaged with the inner wall of the mold cavity 65, so as to avoid forming a countersunk head on the threaded hole 81, and the end of the sleeve 71 far away from the ram 73 is provided with a stop positioning head 712. The sleeve 71 is circumferentially positioned by the stopper positioning head 712, preventing the sleeve 71 from rotating.
In this embodiment, the ram 73 is tapered to facilitate penetration of a force into the surface of the semi-solid casting, and then gradually reaming to form the threaded bore 81.
Preferably, the extrusion driving mechanism is an oil cylinder, the transmission part 74 is a coupling, and the push rod 72 is connected with the output end of the oil cylinder through the coupling. The first driving mechanism, the second driving mechanism, the third driving mechanism and the fourth driving mechanism are all oil cylinders.
Preferably, core-pulling rails penetrate through the second core-pulling sliding seat 21 and the second guiding sliding seat 22, a fifth core-pulling sliding seat 52 and a fifth guiding sliding seat 53 are arranged in the core-pulling rails, and the moving direction of the fifth core-pulling sliding seat 52 and the moving direction of the second core-pulling sliding seat 21 intersect to form an included angle. The back of the second guide slide 22 is provided with a riser 51, a guide rail 54 for guiding the fifth guide slide 53 to slide is arranged on the riser 51, and a fifth driving mechanism 55 for driving the fifth guide slide 53 to slide is arranged on the riser 51. After the second core-pulling slide seat 21 moves in place, the fifth driving mechanism 55 drives the fifth core-pulling slide seat 52 and the fifth guiding slide seat 53 to move towards the direction of the mold cavity 65, drives the fifth core-pulling slide seat 52 to extend out of the second core-pulling slide seat 21 into the mold cavity 65, then aluminum liquid is injected into the mold cavity 65, the aluminum liquid is gradually cooled and solidified into a casting, at the moment, the fifth driving mechanism 55 drives the fifth core-pulling slide seat 52 to draw out and demould, connection between the fifth core-pulling slide seat 52 and the casting is released, and then the second driving mechanism 23 can smoothly drive the second core-pulling slide seat 21 and the second guiding slide seat 22 to move and reset, and the second core-pulling slide seat 21 is separated from the casting. The fifth core-pulling slide 52 allows machining of holes that are not co-directional with the second core-pulling slide 21.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
It will be understood that equivalents and modifications will occur to those skilled in the art based on the present utility model and its spirit, and all such modifications and substitutions are intended to be included within the scope of the present utility model.
Claims (6)
1. The die casting die comprises a movable die frame, a fixed die frame, a movable die core arranged on the movable die frame, a fixed die core arranged on the fixed die frame, a first core pulling mechanism, a second core pulling mechanism, a third core pulling mechanism and a fourth core pulling mechanism, wherein the first core pulling mechanism is used for carrying out core pulling molding on the side part of the automobile gearbox shell and comprises a first core pulling sliding seat and a first guide sliding seat fixedly arranged on the back of the first core pulling sliding seat, and a first driving mechanism used for driving the first core pulling sliding seat and the first guide sliding seat to synchronously move; the second core pulling mechanism comprises a second core pulling slide seat and a second guide slide seat fixedly arranged at the back of the second core pulling slide seat, and a second driving mechanism for driving the second core pulling slide seat and the second guide slide seat to synchronously move; the third core pulling mechanism comprises a third core pulling slide seat and a third guide slide seat fixedly arranged at the back of the third core pulling slide seat, and is used for driving the third core pulling slide seat and the third guide slide seat to synchronously move; the fourth core pulling mechanism comprises a fourth core pulling slide seat and a fourth guide slide seat fixedly arranged at the back of the fourth core pulling slide seat, and a fourth driving mechanism for driving the fourth core pulling slide seat and the fourth guide slide seat to synchronously move; the die is characterized in that a sleeve extending along the moving direction of the first core-pulling sliding seat and a push rod which is arranged in the sleeve and can slide relative to the sleeve are arranged in the first core-pulling sliding seat, one end of the push rod is connected with a pressure head, the other end of the push rod is connected with an extrusion driving mechanism through a transmission part, the extrusion driving mechanism drives the pressure head to extend out of the sleeve through the push rod, the pressure head is used for extruding a semi-solidified casting to form a threaded hole site and guiding bubbles around the threaded hole site to be converged into the threaded hole site, and when the pressure head retracts into the sleeve, the pressure head is flush with the inner wall of the die cavity.
2. The die casting die for an automobile transmission housing according to claim 1, wherein one end of the sleeve, which is close to the pressure head, is a bevel, and one end of the sleeve, which is far away from the pressure head, is provided with a stop positioning head.
3. A die casting die for an automotive transmission housing according to claim 1, characterized in that the ram is cone-shaped.
4. The die casting die for an automotive transmission housing according to claim 1, wherein the extrusion driving mechanism is an oil cylinder, and the transmission member is a coupling.
5. The die casting die for the automobile gearbox shell according to claim 1, wherein core-pulling rails are arranged inside the second core-pulling sliding seat and the second guiding sliding seat in a penetrating mode, a fifth core-pulling sliding seat and a fifth guiding sliding seat are arranged in the core-pulling rails, and the moving direction of the fifth core-pulling sliding seat and the moving direction of the second core-pulling sliding seat intersect to form an included angle.
6. The die casting die for the automobile transmission housing according to claim 5, wherein a riser is provided on the back surface of the second guide slide, a guide rail for guiding the fifth guide slide to slide is provided on the riser, and a fifth driving mechanism for driving the fifth guide slide to slide is provided on the riser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222928169.6U CN219378919U (en) | 2022-10-28 | 2022-10-28 | Die casting die for automobile gearbox shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222928169.6U CN219378919U (en) | 2022-10-28 | 2022-10-28 | Die casting die for automobile gearbox shell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219378919U true CN219378919U (en) | 2023-07-21 |
Family
ID=87197686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222928169.6U Active CN219378919U (en) | 2022-10-28 | 2022-10-28 | Die casting die for automobile gearbox shell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219378919U (en) |
-
2022
- 2022-10-28 CN CN202222928169.6U patent/CN219378919U/en active Active
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