CN115673283A - Motor rotor die-casting die and die-casting method thereof - Google Patents
Motor rotor die-casting die and die-casting method thereof Download PDFInfo
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- CN115673283A CN115673283A CN202211459357.7A CN202211459357A CN115673283A CN 115673283 A CN115673283 A CN 115673283A CN 202211459357 A CN202211459357 A CN 202211459357A CN 115673283 A CN115673283 A CN 115673283A
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- 238000000034 method Methods 0.000 title claims abstract description 50
- 238000004512 die casting Methods 0.000 title claims abstract description 49
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 72
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 71
- 239000000463 material Substances 0.000 claims abstract description 61
- 230000007246 mechanism Effects 0.000 claims abstract description 59
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 38
- 230000008569 process Effects 0.000 claims abstract description 25
- 238000001125 extrusion Methods 0.000 claims abstract description 9
- 238000001816 cooling Methods 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 5
- 239000004411 aluminium Substances 0.000 claims description 4
- 238000005266 casting Methods 0.000 abstract description 20
- 230000000670 limiting effect Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 238000013459 approach Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- KCZFLPPCFOHPNI-UHFFFAOYSA-N alumane;iron Chemical group [AlH3].[Fe] KCZFLPPCFOHPNI-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Abstract
The invention discloses a motor rotor die-casting die, which comprises: a movable mold component; a middle mold assembly; a stationary die assembly; a first mold core, a second mold core and a third mold core which are respectively arranged in the movable mold assembly, the middle mold assembly and the fixed mold assembly are encircled together to form a mold cavity; the ejection mechanism is arranged on the fixed die assembly and comprises at least two ejector pins, and the end parts of the ejector pins are assembled in the third die core and form a cavity communicated with the die cavity together with the third die core; the iron core is installed in the die cavity, and after the aluminum material flows through the movable die assembly, enters the die cavity and completes pouring, the ejection mechanism is driven to move towards the die cavity direction so as to drive the ejector pin to extrude the aluminum material in the die cavity towards the die cavity direction, and therefore the internal gap of the aluminum material is compressed. According to the invention, after the high-pressure casting is finished, when the aluminum material is not completely solidified, the thimble and the cavity are arranged to increase the intramembrane extrusion process so as to increase the local density, thereby achieving the purpose of improving the air hole, effectively improving the aluminum casting quality of the rotor iron core and improving the efficiency of the motor.
Description
Technical Field
The invention relates to the technical field of motor rotor cast aluminum, in particular to a motor rotor die-casting die and a die-casting method thereof.
Background
At present, new energy automobiles are widely popularized and further popularized, particularly electric automobiles, however, for the iron chip of the driving motor of the new energy automobiles, the manufacturing of the iron chip is concerned by people all the time.
The quality of the cast-aluminum rotor of the motor determines the magnitude of the output force, the load starting torque and the overload capacity of the motor. Therefore, the process of die casting aluminum on the rotor core in the production process, namely the process of melting the aluminum material from solid state to liquid state and then die casting the aluminum material into the rotor punching sheet groove to form solid state, is very important and critical. At present, pressure cast aluminum is mostly adopted for rotor core cast aluminum, but in the production process, as the volume of an aluminum material is reduced in the condensation process, various casting defects such as air holes, shrinkage cavities and the like can appear in a casting, the quality of the rotor core cast aluminum is influenced, and the power factor of a motor is reduced.
Therefore, it is necessary to provide a new structure to solve the above technical problems.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a die-casting die for a motor rotor, which is used for increasing the local density by arranging a thimble and a cavity to increase an intramembrane extrusion process when an aluminum material is not completely solidified after high-pressure casting is finished so as to achieve the purpose of improving air holes, effectively improving the aluminum casting quality of a rotor core and improving the efficiency of a motor.
The technical scheme of the invention is summarized as follows:
an electric motor rotor die casting die, includes:
a movable die assembly;
a fixed die assembly;
the middle die assembly is positioned between the movable die assembly and the fixed die assembly;
the mold core comprises a first mold core, a second mold core and a third mold core; wherein,
the first die core is arranged in the moving die assembly, the second die core is arranged in the middle die assembly, the third die core is arranged in the fixed die assembly, and the first die core, the second die core and the third die core are enclosed together to form a die cavity;
the ejection mechanism is arranged on the fixed die assembly; the ejection mechanism at least comprises two ejector pins, the end parts of the ejector pins are assembled to the third mold core, and a space is reserved between the top end surfaces of the ejector pins and the molding surface of the third mold core so as to jointly enclose the third mold core to form a cavity communicated with the mold cavity;
the iron core is installed in the die cavity, aluminum material flows through the movable die assembly in the die-casting process, the movable die assembly sequentially enters the die cavity and the cavity, and after pouring is completed in the cavity, the ejection mechanism is driven to move towards the direction of the die cavity so as to drive the ejector pins to extrude the aluminum material in the cavity towards the direction of the die cavity, so that gaps inside the aluminum material are compressed.
Preferably, the cavity is of a hole structure, and the diameter of the hole structure is matched with that of the thimble.
Preferably, the method further comprises the following steps: the sliding block mechanism is arranged on one side of the fixed die assembly and can move into or out of the fixed die assembly;
when the sliding block mechanism approaches to the direction of the fixed die assembly and moves to the fixed die mounting plate and between the ejector plates, the sliding block mechanism forms the ejector pin to move so as to extrude a limiting structure of the aluminum material in the cavity.
Preferably, the slider mechanism includes:
a slider;
the push rod is fixed with one end of the sliding block;
a guide assembly to mount the push rod;
the push rod is far away from or close to the fixed die assembly along the direction vertical to the fixed die assembly under the guiding action of the guiding assembly so as to drive the sliding block to move into or out of the fixed die assembly.
The second purpose of the invention is to provide a thimble control method in a motor rotor die-casting die, which is configured to execute the following steps:
initializing the position of an ejector pin to wait for the completion of a pouring process;
and after the pouring process is finished, controlling the thimble to move towards the direction of the die cavity so as to extrude the aluminum material in the die cavity.
Preferably, the method further comprises the following steps:
after the extrusion action is finished, controlling the ejector pin to stop moving so as to wait for the cooling and forming of the aluminum material;
and after the aluminum material is cooled and formed, driving the thimble to continuously move towards the direction of the die cavity so as to demould the iron core finished product.
Preferably, the step of extruding the cavity aluminum material by the ejector pin towards the die cavity direction is completed before the aluminum material is not solidified.
The third purpose of the invention is to provide a demoulding method of the motor rotor die-casting mould, which is configured to execute the following steps:
driving the ejection mechanism to move towards the direction of the die cavity so as to drive the ejector pin to extrude the aluminum material in the die cavity towards the direction of the die cavity;
after pressure maintaining and cooling, controlling the movable mold assembly to move to open the mold cavity;
and controlling the ejection mechanism to continuously move towards the direction of the die cavity so as to eject the finished iron core out of the die cavity, and finishing demoulding.
Preferably, the method further comprises the following steps: judging whether the finished iron core product in the die cavity meets the demolding condition;
and when the demolding condition is met, controlling the movable die assembly to move to open the die cavity, and driving the ejection mechanism to perform a demolding procedure.
A fourth object of the present invention is a die-casting method of a die-casting mold for a motor rotor, configured such that the die-casting mold for a motor rotor as described above is executed including the steps of:
controlling the movable die assembly to move to open the die cavity, and loading the iron core into the die cavity;
closing the movable die assembly, and pouring the aluminum material into the die cavity through the movable die assembly;
after the pouring is finished, driving the ejection mechanism to move towards the direction of the die cavity so as to extrude the aluminum material in the die cavity into the die cavity through the ejector pin;
and after pressure maintaining and cooling, controlling the movable die assembly to move to open the die cavity, and continuously pushing the iron core finished product by the ejection mechanism to finish demoulding.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a motor rotor die-casting die, which comprises: a movable die assembly; a middle mold assembly; a stationary die assembly; a first mold core, a second mold core and a third mold core which are respectively arranged in the movable mold assembly, the middle mold assembly and the fixed mold assembly are encircled together to form a mold cavity; the ejection mechanism is arranged on the fixed die assembly and comprises at least two ejector pins, and the end parts of the ejector pins are assembled in the third die core and form a cavity communicated with the die cavity together with the third die core; the iron core is installed in the die cavity, and after the aluminium material stream in the die-casting process entered the die cavity and accomplished the pouring in the cavity in proper order through the movable mould subassembly, drive ejection mechanism moved in the die cavity direction in order to drive the thimble and extrude the aluminium material in the cavity to the die cavity direction to compress the inside space of aluminium material. According to the invention, after the high-pressure casting is finished, when the aluminum material is not completely solidified, the thimble and the cavity are arranged to increase the in-film extrusion process so as to increase the local density, thus the purpose of improving the air hole is achieved, the aluminum casting quality of the rotor core is effectively improved, and the efficiency of the motor is improved; and the design structure is simple, and the production efficiency is improved.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings. The detailed description of the present invention is given in detail by the following examples and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention and do not constitute a limitation of the invention. In the drawings:
FIG. 1 is a schematic view of the movable mold assembly of the present invention in an open position;
FIG. 2 is a schematic view of a casting process after closing of a movable mold assembly according to the present invention;
FIG. 3 is an enlarged view of FIG. 2 at A;
FIG. 4 is a schematic view of the state in which the extrusion process is performed in the present invention;
FIG. 5 is an enlarged view of FIG. 4 at B;
FIG. 6 is a schematic view of a mold-releasing step in the present invention;
fig. 7 is a flowchart of a method for controlling an ejector pin in a die-casting mold for a motor rotor according to embodiment 2 of the present invention;
fig. 8 is a flowchart of a method for demolding a die-casting mold for a motor rotor according to embodiment 3 of the present invention;
fig. 9 is a flowchart of a die-casting method of a die-casting mold for an electric motor rotor according to embodiment 4 of the present invention.
In the figure: 1. a mold;
10. a movable die assembly; 11. a movable mould fixing plate; 111. a main gate; 112. a flow channel; 12. moving the template;
20. a middle mold assembly; 21. a middle template;
30. a stationary die assembly; 31. fixing a template; 32. a fixed die mounting plate; 321. a first mounting hole; 322. a second mounting hole; 33. an ejector plate; 34. fixing the die fixing plate;
40. a mold core; 41. a first mold core; 411. an inner gate; 42. a second mold core; 43. a third mold core; 431. a cavity; 44. a mold cavity;
50. an ejection mechanism; 51. a thimble; 511. a large diameter part; 52. a shaft lever;
60. a slider mechanism; 61. a slider; 62. a push rod; 63. a guide assembly;
2. an iron core;
3. and (4) punching.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments of the present invention, belong to the protection scope of the present invention.
In the drawings, the shape and size may be exaggerated for clarity, and the same reference numerals will be used throughout the drawings to designate the same or similar components.
In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, etc., are defined with respect to the configurations shown in the respective drawings, and in particular, "height" corresponds to a dimension from top to bottom, "width" corresponds to a dimension from left to right, "depth" corresponds to a dimension from front to rear, which are relative concepts, and thus may be varied accordingly depending on the position in which it is used, and thus these or other orientations should not be construed as limiting terms.
Terms concerning attachments, coupling and the like (e.g., "connected" and "attached") refer to a relationship wherein structures are secured or attached, either directly or indirectly, to one another through intervening structures, as well as both movable or rigid attachments or relationships, unless expressly described otherwise.
Example 1
The embodiment of the invention provides a die-casting die for a motor rotor, which is shown in a combined figure 1-6 and comprises the following components:
a movable die assembly 10;
a stationary mold assembly 30;
an intermediate die assembly 20 positioned between the movable die assembly 10 and the fixed die assembly 30;
a core 40 including a first core 41, a second core 42, and a third core 43; wherein,
the first mold core 41 is installed in the movable mold assembly 10, the second mold core 42 is installed in the middle mold assembly 20, the third mold core 43 is installed in the fixed mold assembly 30, and the first mold core 41, the second mold core 42 and the third mold core 43 together enclose to form a mold cavity 44;
an ejection mechanism 50 mounted on the stationary mold assembly 30; the ejection mechanism 50 at least comprises two ejector pins 51, the end parts of the ejector pins 51 are assembled to the third mold core 43, and a distance h1 is formed between the top end surface of each ejector pin 51 and the molding surface of the third mold core 43, so as to form a cavity 431 which is communicated with the mold cavity 44 by being surrounded with the third mold core 43;
the iron core 2 is installed in the die cavity 44, and in the die casting process, after the aluminum material flows through the movable die assembly 10 and sequentially enters the die cavity 44 and the cavity 431 to complete casting, the ejection mechanism 50 is driven to move towards the die cavity 44 so as to drive the ejector pins 51 to extrude the aluminum material in the cavity 431 towards the die cavity 44, so that an inner gap of the aluminum material is compressed.
Specifically, when the iron core 2 is installed in the mold cavity 44, the iron core 2 is fixedly installed in the second mold core 42, so that the side wall of the iron core 2 is poured through the second mold core 42, and the first mold core 41 and the third mold core 43 are respectively located at two ends of the iron core 2 and are used for forming aluminum rings at two ends of the iron core 2; when the mold 1 is used for casting, the thimble 51 is located at an initial position, and at this time, the aluminum material sequentially flows into the first mold core 41, the second mold core 42, the third mold core 43 and the cavity 431; after the casting is completed, the thimble 51 is driven by the driving mechanism to move into the cavity 44 to squeeze the aluminum material in the cavity 431, and at this time, the thimble 51 abuts against the aluminum ring at the end of the iron core 2 to wait for the demolding process. As shown in fig. 3 and 5, when the thimble 51 is located at the initial position, a distance between a top end surface of the thimble 51 and a molding surface of the third mold core 43 is h1; when the thimble 51 finishes extruding the aluminum material in the cavity 431, the distance between the top end surface of the thimble 51 and the molding surface of the third mold core 43 is h2. Wherein h1> h2, h2 may be 0.
According to the invention, after the high-pressure casting is finished, when the aluminum material is not completely solidified, the thimble 51 and the cavity 431 are arranged to increase the intramembrane extrusion process so as to increase the local density of the aluminum ring, thereby achieving the purpose of improving the air hole, effectively improving the aluminum casting quality of the rotor core 2 and improving the efficiency of the motor; and the design structure is simple, and the production efficiency is improved.
Further, the cavity 431 has a hole structure, and the diameter of the hole structure is matched with the diameter of the thimble 51. Specifically, a hole structure penetrates through the third mold core 43, one end of the hole structure is communicated with the mold cavity 44, the other end of the hole structure is used for passing through the thimble 51, and the thimble 51 can move axially along the hole structure; and the inner diameter of the hole structure is equal to the diameter of the thimble 51 so that the thimble 51 can block the hole structure to ensure the sealing performance.
In one embodiment, the movable die assembly 10 includes:
a movable mold fixing plate 11, on which a main gate 111 and a runner 112 connected with the main gate 111 are opened; the main gate 111 is used for being assembled with the punch 3, and the runner 112 is communicated with the first mold core 41;
a movable platen 12 for fixing the first core 41;
the aluminum material enters the movable mold fixing plate 11 through the main gate 111, and the punch 3 injects the aluminum material into the runner 112 and then flows through the first mold core 41 into the mold cavity 44.
Further, an inner gate 411 communicating with the mold cavity 44 is disposed on a side of the first mold core 41 close to the movable mold fixing plate 11, and the inner gate 411 is used for connecting with the runner 112.
In one embodiment, the middle die assembly 20 is mounted with the fixed die assembly 30; the middle module 20 includes a middle mold plate 21 for fixing the second mold core 42, and the middle mold plate 21 and the movable mold plate 12 are matched with each other.
In one embodiment, the stationary mold assembly 30 includes:
a fixed mold plate 31 for fixing the third mold core 43;
the fixed die mounting plate 32 is assembled with the fixed die plate 31, and the fixed die mounting plate 32 is provided with a mounting hole for mounting the ejection mechanism 50;
an ejector plate 33 for fixing the ejector mechanism 50;
a fixed mold fixing plate 34 fixedly mounted with the ejector plate 33;
after the iron core 2 is poured in the die cavity 44, the fixed die fixing plate 34 and the ejector plate 33 are driven to approach the fixed die plate 31 so as to drive the ejection mechanism 50 to penetrate through the mounting hole to act on the rotor iron core 2.
Further, the ejection mechanism 50 further includes a shaft rod 52, which penetrates through the fixed die mounting plate 32 and the middle 43 of the third die core and is fixedly connected with the ejector plate 33; the shaft 52 acts on the core 2 central axis to push it out of the die cavity 44.
Specifically, the mounting holes include a first mounting hole 321 and a second mounting hole 322, the thimble 51 is inserted into the first mounting hole 321, the shaft rod 52 is inserted into the second mounting hole 322, the first mounting hole 321, the thimble 51, the second mounting hole 322 and the shaft rod 52 are in clearance fit, the thimble 51 and the shaft rod 52 can reciprocate in the first mounting hole 321 and the second mounting hole 322, and meanwhile, the fixed die mounting plate 32 forms a limiting and guiding structure of the ejection mechanism 50; the third mold core 43 is provided with a cavity 431 adapted to the thimble 51 and an ejection hole adapted to the shaft rod 52, so that the ejection structure 50 can penetrate through the third mold core 43 and act on the rotor core 2, wherein when the shaft rod 52 is located at an initial position, a gap is formed between the shaft rod 52 and the rotor core 2, the length of the gap is equal to the movement distance of the thimble 51 extruding the cavity 431, that is, when the mold 1 is cast, the thimble 51 extrudes the aluminum material in the cavity 431, the ejection structure 50 is in a state where the thimble 51 abuts against the end surface of the aluminum ring of the rotor core 2, and the shaft rod 52 abuts against the end surface of the central shaft of the rotor core 2 to wait for the demolding process.
In an embodiment, a large diameter portion 511 is formed on a side wall of the thimble 51 to form a limiting structure of the thimble 51. Specifically, the diameter of the large diameter portion 511 is larger than the diameter of the cavity 431, but is smaller than or equal to the diameter of the first mounting hole 321, that is, when the mold 1 is subjected to a demolding process and the ejection mechanism 50 ejects the rotor core 2 to remove the rotor core from the mold cavity 44, the large diameter portion 511 can pass through the first mounting hole 321 but is limited outside the cavity 431, and this arrangement effectively prevents the ejector pin 51 from moving beyond the stroke to cause damage.
In one embodiment, the method further comprises: a slider mechanism 60 installed at one side of the fixed mold assembly 30 and movable into and out of the interior of the fixed mold assembly 30;
when the slider mechanism 60 approaches the fixed die assembly 30 and moves to a position between the fixed die mounting plate 34 and the ejector plate 33, the slider mechanism 60 forms a limiting structure for the ejector 51 to move so as to extrude the aluminum material in the cavity 431.
Specifically, after the high-pressure casting is completed, when the aluminum material is not completely solidified, the slider mechanism 60 moves towards the inside of the mold 1 until the slider mechanism 60 is located between the fixed mold mounting plate 34 and the ejector plate 33, at this time, the ejector plate 33 pushes the ejector pins 51 to move towards the mold cavity 44, and when the ejector plate 33 contacts the slider mechanism 60 and abuts against the fixed mold mounting plate 34, the ejector pins 51 can squeeze the aluminum material in the cavity 431 into the mold cavity 44, and the problem of casting defects caused by the over-stroke phenomenon under the limiting action of the slider mechanism 60 is avoided.
Further, the slider mechanism 60 includes:
a slider 61;
a push rod 62 fixed to one end of the slider 61;
a guide assembly 63 for mounting the push rod 62;
the push rod 62 moves away from or close to the fixed mold assembly 30 in a direction perpendicular to the fixed mold assembly 30 under the guiding action of the guide assembly 63, so as to drive the slide block 61 to move into or out of the interior of the fixed mold assembly 30.
Wherein, the slide block mechanism 60 is perpendicular to the fixed mold assembly 30, i.e. the motion track of the slide block mechanism 60 is perpendicular to the motion track of the ejector plate 33.
Specifically, the slide block 61 is in a rectangular parallelepiped structure, when the slide block 61 slides into the fixed mold assembly 30, one side surface of the slide block 61 is attached to the fixed mold mounting plate 32, and the other side surface is used for abutting against the ejector plate 33 moving towards the mold cavity 44; the end of the push rod 62 is connected to the central position of the slide block 61 for driving the slide block 61 to reciprocate in the direction perpendicular to the movement direction of the thimble 51; the guide assembly 63 forms a fixed mounting structure of the slider mechanism 60 and simultaneously plays a role in limiting the movement direction of the push rod 62, wherein a through hole matched with the diameter of the push rod 62 is formed in the guide assembly 63, and the push rod 62 penetrates through the through hole and can move in a reciprocating manner relative to the through hole.
Example 2
The embodiment of the invention also provides a method for controlling the ejector pin in the die-casting die for the motor rotor, as shown in fig. 7, the step of configuring the die-casting die for the motor rotor comprises the following steps:
initializing the position of the thimble 51 to wait for the completion of the pouring process;
after the casting process is completed, the thimble 51 is controlled to move towards the cavity 44 to squeeze the aluminum material in the cavity 431.
Further, the method also comprises the following steps:
after the extrusion action is finished, controlling the thimble 51 to stop moving so as to wait for the cooling and forming of the aluminum material;
after the aluminum material is cooled and formed, the ejector pin 51 is driven to continue moving towards the mold cavity 44 to demold the finished iron core 2.
The step of pressing the cavity 431 with the ejector pin 51 toward the cavity 44 is completed before the aluminum material is not solidified.
Example 3
The embodiment of the invention also provides a demolding method of the motor rotor die-casting mold, as shown in fig. 8, the motor rotor die-casting mold configured as above includes the following steps:
driving the ejection mechanism 50 to move towards the direction of the die cavity 44 so as to drive the ejector pin 51 to extrude the aluminum material in the cavity 431 towards the direction of the die cavity 44;
after pressure maintaining and cooling, controlling the movable mold assembly 10 to move to open the mold cavity 44;
and controlling the ejection mechanism 50 to continuously move towards the direction of the die cavity 44 to eject the finished iron core 2 out of the die cavity 44, so as to finish demoulding.
Further, still include: judging whether the finished product of the iron core 2 in the die cavity 44 meets the demoulding condition;
when the demolding condition is satisfied, the movable mold assembly 10 is controlled to move to open the mold cavity 44, and the ejection mechanism 50 is driven to perform the demolding process.
In one embodiment, at least the demolding temperature and the demolding pressure are detected to reach the demolding condition.
Example 4
The invention also provides a die-casting method of the die-casting die for the motor rotor, which is combined with the die-casting die for the motor rotor shown in the figures 1 to 9, and the die-casting die for the motor rotor, which is configured as the embodiment 1, comprises the following steps:
controlling the movable die assembly 10 to move to open the die cavity 44, and loading the iron core 2 into the die cavity 44;
closing the movable die assembly 10, and pouring the aluminum material into the die cavity 44 through the movable die assembly 10;
after the pouring is finished, the ejection mechanism 50 is driven to move towards the direction of the die cavity 44 so as to extrude the aluminum material in the cavity 431 into the die cavity 44 through the ejector pins 51;
after pressure maintaining and cooling, the movable mold assembly 30 is controlled to move to open the mold cavity 44, and the ejection mechanism 50 continues to eject the finished iron core 2 to complete demolding.
In an embodiment, after the casting is completed for 1s, the thimble 51 is driven to move towards the mold cavity 44 to extrude the aluminum material in the cavity 431, so that the extrusion process can be completed when the aluminum material is not completely solidified, and the aluminum casting quality of the rotor core 2 is improved.
In one embodiment, the cooling time of the mold 1 is set to 10-12s to ensure that the demolding process is performed after the aluminum material is completely solidified, so as to avoid the problem of casting defects.
The working process of the motor rotor die-casting die at least comprises the following steps:
controlling the moving die assembly 10 to move to open the moving die fixing plate 11 and the moving die plate 12, moving the first die core 41 away from the second die core 42 and the third die core 43 along with the moving die plate 12 to open the die cavity 44, and installing the iron core 2 inside the second die core 42 and the third die core 43; closing the movable die assembly 10, abutting the first die core 41 on the second die core 42 to enable the iron core 2 to be completely arranged in the die cavity 44, enabling the aluminum material to flow in from the main gate 111, and flowing through the runner 112 and the inner gate 411 in sequence under the injection of the punch 3 to enter the die cavity 44 so as to cast the iron core 2; after injection is completed for 1s, the slider mechanism 60 controls the push rod 62 to push the slider 62 to move between the fixed die mounting plate 32 and the ejector plate 33, at this time, the bench ejector rod pushes the ejector plate 33 to move towards the die cavity 44, and the ejector plate 33 drives the ejector pins 51 to advance to extrude the aluminum material in the cavity 431 towards the die cavity 44 until the ejector plate 33 abuts against the slider 61; after the mold 1 is cooled for 10-12s, the movable mold assembly 10 is opened, the sliding block 61 moves and resets towards the outside of the mold 1 under the pulling action of the push rod 62, the machine ejector rod continues to push the ejection mechanism 50 to move towards the mold cavity 44 so as to eject the cast aluminum iron core 2 through the ejector pins 51 and the shaft rods 52, when the ejector plate 33 is attached to the fixed mold mounting plate 32, the ejection mechanism 50 moves to the limit position, and at the moment, the iron core 2 completes the demolding process.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (10)
1. The utility model provides an electric motor rotor die casting die which characterized in that includes:
a movable die assembly;
a stationary die assembly;
the middle die assembly is positioned between the movable die assembly and the fixed die assembly;
the mold core comprises a first mold core, a second mold core and a third mold core; wherein,
the first die core is arranged in the moving die assembly, the second die core is arranged in the middle die assembly, the third die core is arranged in the fixed die assembly, and the first die core, the second die core and the third die core are enclosed together to form a die cavity;
the ejection mechanism is arranged on the fixed die assembly; the ejection mechanism at least comprises two ejector pins, the end parts of the ejector pins are assembled to the third mold core, and a space is reserved between the top end surfaces of the ejector pins and the molding surface of the third mold core so as to form a cavity communicated with the mold cavity by enclosing with the third mold core;
the iron core is installed in the die cavity, aluminum material flows through the movable die assembly in the die-casting process, the movable die assembly sequentially enters the die cavity and the cavity, and after pouring is completed in the cavity, the ejection mechanism is driven to move towards the direction of the die cavity so as to drive the ejector pins to extrude the aluminum material in the cavity towards the direction of the die cavity, so that gaps inside the aluminum material are compressed.
2. The electric motor rotor die-casting mold as claimed in claim 1, wherein: the cavity is of a hole structure, and the diameter of the hole structure is matched with that of the thimble.
3. The electric machine rotor die-casting mold as recited in claim 1, further comprising: the sliding block mechanism is arranged on one side of the fixed die assembly and can move into or out of the fixed die assembly;
when the slider mechanism to the cover half subassembly direction is close to and moves extremely the cover half mounting panel with when between the thimble board, slider mechanism forms the thimble motion is in order to extrude the limit structure of aluminium material in the cavity.
4. The motor rotor die-casting mold as recited in claim 3, wherein the slide mechanism comprises:
a slider;
the push rod is fixed with one end of the sliding block;
a guide assembly to mount the push rod;
the push rod is far away from or close to the fixed die assembly along the direction vertical to the fixed die assembly under the guiding action of the guiding assembly so as to drive the sliding block to move into or out of the fixed die assembly.
5. A thimble control method in a motor rotor die-casting die, which is characterized in that the motor rotor die-casting die according to any one of claims 1-4 is configured to execute the following steps:
initializing the position of an ejector pin to wait for the completion of a pouring process;
and after the pouring process is finished, controlling the thimble to move towards the direction of the die cavity so as to extrude the aluminum material in the die cavity.
6. The method for controlling the ejector pin in the die-casting die for the motor rotor as claimed in claim 5, further comprising the steps of:
after the extrusion action is finished, controlling the ejector pin to stop moving so as to wait for the cooling and forming of the aluminum material;
and after the aluminum material is cooled and formed, driving the ejector pin to continuously move towards the direction of the die cavity so as to demould the iron core finished product.
7. The ejector pin control method in the die-casting die for the motor rotor as claimed in claim 5, wherein: and the step of extruding the cavity aluminum material towards the mold cavity direction by the ejector pin is completed before the aluminum material is not solidified.
8. A method for demoulding a die-casting mould for an electric motor rotor, characterized in that the step of configuring the die-casting mould for an electric motor rotor as claimed in any one of claims 1 to 4 is carried out and comprises the following steps:
driving the ejection mechanism to move towards the direction of the die cavity so as to drive the ejector pin to extrude the aluminum material in the die cavity towards the direction of the die cavity;
after pressure maintaining and cooling, controlling the movable die assembly to move to open the die cavity;
and controlling the ejection mechanism to continuously move towards the direction of the die cavity so as to eject the finished iron core out of the die cavity, and finishing demoulding.
9. The method for stripping a die-casting mold for an electric machine rotor as claimed in claim 8, further comprising: judging whether the finished product of the iron core in the die cavity meets the demolding condition;
and when the demolding condition is met, controlling the movable die assembly to move to open the die cavity, and driving the ejection mechanism to perform a demolding procedure.
10. A method for die-casting a die-casting mold for an electric motor rotor, characterized in that the step of configuring the die-casting mold for an electric motor rotor as claimed in any one of claims 1 to 4 is performed by comprising the steps of:
controlling the movable die assembly to move to open the die cavity, and loading the iron core into the die cavity;
closing the movable die assembly, and pouring the aluminum material into the die cavity through the movable die assembly;
after the pouring is finished, driving the ejection mechanism to move towards the direction of the die cavity so as to extrude the aluminum material in the die cavity into the die cavity through the ejector pin;
and after pressure maintaining and cooling, controlling the movable die assembly to move to open the die cavity, and continuously pushing the iron core finished product by the ejection mechanism to finish demoulding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211459357.7A CN115673283A (en) | 2022-11-16 | 2022-11-16 | Motor rotor die-casting die and die-casting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211459357.7A CN115673283A (en) | 2022-11-16 | 2022-11-16 | Motor rotor die-casting die and die-casting method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115673283A true CN115673283A (en) | 2023-02-03 |
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ID=85054427
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211459357.7A Withdrawn CN115673283A (en) | 2022-11-16 | 2022-11-16 | Motor rotor die-casting die and die-casting method thereof |
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| Country | Link |
|---|---|
| CN (1) | CN115673283A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117245073A (en) * | 2023-11-20 | 2023-12-19 | 广东敏卓机电股份有限公司 | Rotor core die casting die |
| CN117340218A (en) * | 2023-10-09 | 2024-01-05 | 河南永荣动力股份有限公司 | Automatic pressure aluminum casting equipment for cage motor rotor and control method thereof |
-
2022
- 2022-11-16 CN CN202211459357.7A patent/CN115673283A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117340218A (en) * | 2023-10-09 | 2024-01-05 | 河南永荣动力股份有限公司 | Automatic pressure aluminum casting equipment for cage motor rotor and control method thereof |
| CN117340218B (en) * | 2023-10-09 | 2024-05-07 | 河南永荣动力股份有限公司 | Automatic pressure aluminum casting equipment for cage motor rotor and control method thereof |
| CN117245073A (en) * | 2023-11-20 | 2023-12-19 | 广东敏卓机电股份有限公司 | Rotor core die casting die |
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