阅读说明：本技术 一种铸铝模具 (Cast aluminum die ) 是由 喻科先 徐嘉柱 吴连辉 张力航 周杰 于 2019-11-27 设计创作，主要内容包括：本发明涉及成型铸铝转子技术领域,尤其是指一种铸铝模具,包括中模、装设于中模的底端的下模、设置于中模内的上模、盖合于中模的顶端的压板及设置于压板与上模之间的定位套筒,所述定位套筒的两端分别与压板和上模抵触,所述下模、中模和上模围设成铸铝空间,所述下模设置有与铸铝空间连通的注铝孔,所述上模设置有第一过轴孔,所述压板设置有第二过轴孔,所述第一过轴孔经由定位套筒与第二过轴孔连通,所述第一过轴孔、定位套筒和第二过轴孔同轴设置。本发明只需更换定位套筒即能够对不同规格长度的铸铝转子进行生产,通用性好,适用范围广,降低了铸铝模具的制造和使用成本,缩短了制造铸铝模具的周期,降低了制造铸铝模具的难度。(The invention relates to the technical field of molded cast aluminum rotors, in particular to a cast aluminum mold which comprises a middle mold, a lower mold arranged at the bottom end of the middle mold, an upper mold arranged in the middle mold, a pressing plate covering the top end of the middle mold and a positioning sleeve arranged between the pressing plate and the upper mold, wherein two ends of the positioning sleeve are respectively abutted against the pressing plate and the upper mold, the lower mold, the middle mold and the upper mold are enclosed to form an aluminum casting space, the lower mold is provided with an aluminum injection hole communicated with the aluminum casting space, the upper mold is provided with a first through hole, the pressing plate is provided with a second through hole, the first through hole is communicated with the second through hole through the positioning sleeve, and the first through hole, the positioning sleeve and the second through hole are coaxially arranged. The invention can produce the cast aluminum rotors with different specifications and lengths only by replacing the positioning sleeve, has good universality and wide application range, reduces the manufacturing and using cost of the cast aluminum mould, shortens the period for manufacturing the cast aluminum mould and reduces the difficulty for manufacturing the cast aluminum mould.)

1. The utility model provides a cast aluminium mould which characterized in that: including well mould, install in the lower mould of the bottom of well mould, set up in the well mould go up the mould, cover the clamp plate that fits the top of well mould and set up in clamp plate and last mould between the position sleeve, position sleeve's both ends are contradicted with clamp plate and last mould respectively, lower mould, well mould and last mould enclose and establish into the cast aluminium space, the lower mould is provided with the notes aluminium hole with cast aluminium space intercommunication, it is provided with first cross the shaft hole to go up the mould, the clamp plate is provided with the second and crosses the shaft hole, first cross the shaft hole and cross the shaft hole intercommunication via position sleeve and second, first cross the shaft hole, position sleeve and second and cross the coaxial setting in shaft hole.

2. The cast aluminum mold of claim 1, wherein: the top surface of the lower die is concavely provided with a containing hole which is coaxially arranged with the first through shaft hole, and the containing hole is communicated with the cast aluminum space.

3. The cast aluminum mold of claim 1, wherein: the aluminium injection holes comprise a plurality of first aluminium injection molding holes which are arranged in an annular array around the central axis of the lower die.

4. A cast aluminium mould according to claim 3, wherein: the notes aluminium hole still includes a plurality of second notes aluminium shaping hole, and a plurality of second notes aluminium shaping hole is annular array around the central axis of lower mould and sets up, and a plurality of first notes aluminium shaping holes and a plurality of second notes aluminium shaping hole interval set up.

5. The cast aluminum mold of claim 4, wherein: the upper die is provided with a plurality of first forming holes, the first forming holes are arranged in an annular array around the central axis of the upper die, and the first forming holes and the first aluminum injection forming holes are arranged in a one-to-one correspondence mode.

6. The cast aluminum mold of claim 5, wherein: the mould is provided with a plurality of second shaping holes, and a plurality of second shaping holes are the setting of annular array around the central axis of last mould, and a plurality of first shaping holes and a plurality of second shaping hole interval set up, and a plurality of second shaping holes and a plurality of second are annotated aluminium shaping hole one-to-one and are set up.

7. The cast aluminum mold of claim 1, wherein: the bottom of well mould is provided with down the seal section, the concave lower seal groove that is used for with the sealed complex of lower seal section that is equipped with of top surface of lower mould.

8. The cast aluminum mold of claim 1, wherein: the top end of the middle die is provided with an upper sealing section, and the bottom surface of the pressing plate is concavely provided with an upper sealing groove matched with the upper sealing section in a sealing manner.

9. The cast aluminum mold of claim 1, wherein: the middle mold comprises a plurality of middle mold bodies which are detachably connected end to end.

10. A cast aluminium mould according to claim 9, wherein: the middle die main body comprises an arc plate and two locking plates arranged on the outer side wall of the arc plate, the two locking plates are respectively located at two ends of the arc plate, and the locking plates of the two adjacent middle die main bodies are connected through a locking assembly.

Technical Field

The invention relates to the technical field of forming cast aluminum rotors, in particular to a cast aluminum mold.

Background

As is well known, the existing motor rotor aluminum casting process is completed by an aluminum casting mold, and the aluminum casting mold consists of an aluminum casting upper mold, an aluminum casting middle mold and an aluminum casting lower mold. The motor rotor has a plurality of specifications with the same outer diameter and different lengths, so that when the rotors with the same outer diameter and different lengths are produced, a plurality of sets of rotors with different lengths and different specifications can be correspondingly produced in the cast aluminum. Because the manufacturing material of the cast aluminum middle die is made of nodular cast iron, the material is very expensive, the manufacturing cost is high, and the precision requirement of the production rotor on the cast aluminum middle die is higher, the difficulty of manufacturing the cast aluminum middle die is high, the manufacturing period is long, the efficiency of manufacturing the cast aluminum die and the production rotor is reduced, and the production benefit of enterprises is greatly influenced. In addition, the volume of the cast aluminum middle mold is large, the space occupied by the cast aluminum middle mold is large, and the cast aluminum middle mold is difficult to store. Therefore, the drawbacks are obvious, and a solution is needed.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide an efficient cast aluminum mold which can produce cast aluminum rotors with different specifications and lengths by only replacing a positioning sleeve without replacing a middle mold.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a cast aluminum mould, its includes well mould, install in the lower mould of the bottom of well mould, set up in the well mould go up the mould, cover the clamp plate that fits the top of well mould and set up the position sleeve between clamp plate and last mould, position sleeve's both ends are contradicted with clamp plate and last mould respectively, lower mould, well mould and last mould enclose and establish into cast aluminum space, the lower mould is provided with the notes aluminium hole with cast aluminum space intercommunication, it is provided with first cross the shaft hole to go up the mould, the clamp plate is provided with the second and crosses the shaft hole, first cross the shaft hole and cross the shaft hole intercommunication via position sleeve and second, first cross the coaxial setting in shaft hole, position sleeve and second.

Furthermore, the top surface of the lower die is concavely provided with a containing hole which is coaxially arranged with the first through shaft hole, and the containing hole is communicated with the cast aluminum space.

Further, the aluminium injection holes comprise a plurality of first aluminium injection molding holes which are arranged around the central axis of the lower die in an annular array.

Further, annotate the aluminium hole and still include a plurality of second and annotate aluminium shaping hole, a plurality of second are annotated aluminium shaping hole and are the annular array around the central axis of lower mould and set up, and a plurality of first notes aluminium shaping holes and a plurality of second are annotated aluminium shaping hole interval and are set up.

Furthermore, the upper die is provided with a plurality of first forming holes, the first forming holes are arranged around the central axis of the upper die in an annular array, and the first forming holes and the first aluminum injection forming holes are arranged in a one-to-one correspondence manner.

Further, go up the mould and be provided with a plurality of second shaping holes, a plurality of second shaping holes are annular array around the central axis of last mould and set up, and a plurality of first shaping holes and a plurality of second shaping hole interval set up, and a plurality of second shaping holes and a plurality of second notes aluminium shaping hole one-to-one set up.

Further, the bottom end of the middle die is provided with a lower sealing section, and the top surface of the lower die is concavely provided with a lower sealing groove matched with the lower sealing section in a sealing manner.

Furthermore, the top end of the middle die is provided with an upper sealing section, and the bottom surface of the pressing plate is concavely provided with an upper sealing groove matched with the upper sealing section in a sealing manner.

Further, the middle die comprises a plurality of middle die main bodies, and the plurality of middle die main bodies are detachably connected end to end.

Further, well mould main part includes the circular arc board and sets up in two jam plates of the lateral wall of circular arc board, and two jam plates are located the both ends of circular arc board respectively, and the jam plate of two adjacent well mould main parts is connected via locking Assembly.

The invention has the beneficial effects that: during the in-service use, place the lower mould on the die casting machine, install the bottom of well mould on the lower mould, will fold the rotor core who presses good again and install on cast aluminium dummy shaft, then will have cast aluminium dummy shaft and place in well mould the pivot iron core that presses good with folding, will go up the mould again and install in well mould and conflict rotor core, make rotor core be located cast aluminium space, place the location sleeve of suitable length on last mould, at last close the top of well mould with the clamp plate lid and compress tightly the location sleeve, the clamp plate compresses tightly on rotor core via the location sleeve, cast aluminium dummy shaft runs through first axle hole, location sleeve and second cross the axle hole, and cast aluminium dummy shaft top stretches out outside the clamp plate suddenly, the die casting machine compresses tightly this cast aluminium mould and to pouring into aluminium liquid in the cast aluminium space via the aluminium hole, thereby produce cast aluminium rotor. The invention has simple and compact structure, the upper die is arranged in the middle die in a sliding way, cast aluminum rotors with different specifications and lengths can be produced according to actual needs, the height of a cast aluminum space can be changed only by replacing the positioning sleeves with different lengths, and therefore, the requirement of producing the cast aluminum rotors with different specifications and lengths can be met, compared with the prior art that one set of cast aluminum die can only produce the cast aluminum rotor with one length in a targeted way, the cast aluminum rotors with different specifications and lengths need middle dies with different specifications and lengths, the cast aluminum die does not need to replace the middle die, the cast aluminum rotors with different specifications and lengths can be produced only by replacing the positioning sleeves, the universality is good, the application range is wide, compared with replacing the middle die by replacing the positioning sleeves, the manufacturing and using cost of the cast aluminum die is greatly reduced, the period for manufacturing the cast aluminum die is shortened, and the difficulty for manufacturing the cast aluminum die is reduced, thereby improving the efficiency of producing the cast aluminum rotor.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

FIG. 2 is a schematic perspective view of a cast aluminum dummy shaft according to the present invention.

FIG. 3 is an exploded view of the aluminum casting dummy shaft according to the present invention.

FIG. 4 is an exploded view of another perspective of the aluminum casting dummy shaft according to the present invention.

Fig. 5 is a cross-sectional view taken at a-a in fig. 2.

FIG. 6 is a perspective view of a cast aluminum dummy shaft according to the present invention.

FIG. 7 is an exploded view of the cast aluminum dummy shaft of the present invention.

FIG. 8 is a schematic structural diagram of another perspective view of the cast aluminum dummy shaft of the present invention.

Fig. 9 is a schematic structural view of the cast aluminum rotor according to the present embodiment.

Description of reference numerals:

1. a dummy shaft body; 10. a forming member; 101. a slide plate; 102. a feather key; 11. an upper half dummy shaft body; 111. a chute; 12. a lower half dummy shaft body; 13. a connecting bond; 14. an upper abutting inclined plane; 15. a lower abutting inclined plane; 16. a keyway; 17. a cover plate; 18. mounting grooves; 19. hoisting holes; 2. a middle mold; 21. a first through-shaft hole; 22. a lower seal section; 23. an upper seal section; 24. a middle mold main body; 25. a circular arc plate; 26. a locking plate; 27. a locking hole; 28. positioning blocks; 3. a lower die; 31. a first aluminum injection molding hole; 32. a second aluminum injection molding hole; 33. a lower seal groove; 4. an upper die; 41. a housing hole; 42. a first forming hole; 43. a second molding hole; 44. an upper seal groove; 5. pressing a plate; 51. a second through shaft hole; 52. locking lugs; 53. a lock hole; 6. a positioning sleeve; 7. a cast aluminum space; 8. a cast aluminum rotor.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.

As shown in fig. 1 to 9, the cast aluminum mold provided by the invention comprises a middle mold 2, a lower mold 3 installed at the bottom end of the middle mold 2, an upper mold 4 slidably arranged in the middle mold 2, a pressing plate 5 covering the top end of the middle mold 2, and a positioning sleeve 6 arranged between the pressing plate 5 and the upper mold 4, wherein two ends of the positioning sleeve 6 respectively abut against the bottom surface of the pressing plate 5 and the top surface of the upper mold 4, the lower mold 3, the middle mold 2, and the upper mold 4 enclose an aluminum casting space 7, the lower mold 3 is provided with an aluminum injection hole communicated with the aluminum casting space 7, the upper mold 4 is provided with a first through-hole 21, the pressing plate 5 is provided with a second through-hole 51, the first through-hole 21 is communicated with the second through-hole 51 through the positioning sleeve 6, and the first through-hole 21, the positioning sleeve 6, and the second through-hole 51 are; specifically, the bore diameter of the first through-hole 21, the inner bore diameter of the positioning sleeve 6 and the bore diameter of the second through-hole 51 are equal; specifically, the cast aluminum mold further comprises a cast aluminum dummy shaft, the cast aluminum dummy shaft is inserted into the cast aluminum space 7 through the second through-hole 51, the inner hole of the positioning sleeve 6 and the first through-hole 21 in sequence, and the top end of the cast aluminum dummy shaft protrudes out of the pressure plate 5.

In practical application, the lower die 3 is placed on a die casting machine, the bottom end of the middle die 2 is arranged on the lower die 3, the laminated rotor iron core is arranged on a cast aluminum dummy shaft, then the laminated rotating shaft iron core with the cast aluminum false shaft is placed in the middle mold 2, the upper mold 4 is arranged in the middle mold 2 and is abutted against the rotor iron core, the rotor core is positioned in the cast aluminum space 7, the positioning sleeve 6 with proper length is placed on the upper die 4, finally the pressing plate 5 is covered at the top end of the middle die 2 and tightly presses the positioning sleeve 6, the pressing plate 5 tightly presses the upper die 4 on the rotor core through the positioning sleeve 6, the cast aluminum dummy shaft penetrates through the first through-shaft hole 21, the positioning sleeve 6 and the second through-shaft hole 51, and the top end of the cast aluminum dummy shaft extends out of the pressing plate 5, the die casting machine compresses the cast aluminum die and injects aluminum liquid into the cast aluminum space 7 through the aluminum injection hole, thereby producing the cast aluminum rotor 8. The invention has simple and compact structure, the upper die 4 is arranged in the middle die 2 in a sliding way, cast aluminum rotors 8 with different specifications and lengths can be produced according to actual needs, the height of the cast aluminum space 7 can be changed only by replacing the positioning sleeve 6 with different lengths, thereby being capable of meeting the requirement of producing and manufacturing the cast aluminum rotors 8 with different specifications and lengths, compared with the prior art that one set of cast aluminum die can only produce the cast aluminum rotor 8 with one length in a targeted way, the cast aluminum rotors 8 with different specifications and lengths can be produced by replacing the middle die 2, the cast aluminum die can produce the cast aluminum rotors 8 with different specifications and lengths only by replacing the positioning sleeve 6 without replacing the middle die 2, the universality is good, the application range is wide, the manufacture and use cost of the cast aluminum die is greatly reduced and the period for manufacturing the cast aluminum die is shortened by replacing the positioning sleeve 6 compared with the middle die 2, the difficulty of manufacturing the cast aluminum mold is reduced, and the efficiency of producing the cast aluminum rotor 8 is improved.

In this embodiment, the top surface of the lower die 3 is concavely provided with a containing hole 41 coaxially arranged with the first through-shaft hole 21, the containing hole 41 is communicated with the cast aluminum space 7, and the bottom end of the cast aluminum dummy shaft is inserted into the containing hole 41. The bottom end of the cast aluminum dummy shaft is accommodated in the accommodating hole 41, the inner wall of the accommodating hole 41 limits the cast aluminum dummy shaft, the position precision and stability of the cast aluminum dummy shaft are ensured, and the coaxiality of the middle die 2, the lower die 3, the upper die 4, the pressing plate 5, the positioning sleeve 6 and the cast aluminum dummy shaft is also ensured.

In this embodiment, the aluminum injection holes include a plurality of first aluminum injection molding holes 31 for molding the heat sink, and the plurality of first aluminum injection molding holes 31 are arranged in an annular array around the central axis of the lower mold 3.

Through setting up a plurality of first notes aluminium shaping hole 31, not only can annotate aluminium in the cast aluminium space 7, can also be protruding with cast aluminium rotor 8 shaping fin.

In this embodiment, the aluminum injection holes further include a plurality of second aluminum injection molding holes 32 for molding the balance bar, the second aluminum injection molding holes 32 are arranged in an annular array around the central axis of the lower mold 3, and the first aluminum injection molding holes 31 and the second aluminum injection molding holes 32 are arranged at intervals.

Through setting up a plurality of second notes aluminium shaping hole 32, not only can annotate aluminium in the cast aluminium space 7, can also be with cast aluminium rotor 8 shaping play balancing pole. And through a plurality of first notes aluminium shaping holes 31 and a plurality of second notes aluminium shaping holes 32 notes aluminium to in the cast aluminium space 7, improved the efficiency of annotating aluminium, and then improved the efficiency of production cast aluminium rotor 8.

In this embodiment, the upper die 4 is provided with a plurality of first forming holes 42 for forming the heat sink, the plurality of first forming holes 42 are arranged in an annular array around the central axis of the upper die 4, and the plurality of first forming holes 42 and the plurality of first aluminum injection forming holes 31 are arranged in a one-to-one correspondence; go up mould 4 and be provided with a plurality of second shaping holes 43 that the shaping goes out balance, a plurality of second shaping holes 43 are the annular array setting around the central axis of last mould 4, and a plurality of first shaping holes 42 and a plurality of second shaping holes 43 interval set up, and a plurality of second shaping holes 43 and a plurality of second notes aluminium shaping hole 32 one-to-one set up. This structural design not only can the shaping cast aluminum rotor 8 who has fin and equilibrium post, can also make cast aluminum rotor 8's structural symmetry, structural stability is good.

Specifically, the shape of the first aluminum injection molding hole 31 is a rectangle or an isosceles trapezoid, and the shape of the first molding hole 42 is the same as the shape of the first aluminum injection molding hole 31. The cast aluminum rotor 8 with the radiating fins is formed, and the radiating fins with the rectangular cross sections have large radiating area and good radiating effect.

Specifically, the second injection molding hole 32 is circular, and the second molding hole 43 has the same shape as the second injection molding hole 32. The second injection molding holes 32 and the second molding holes 43 are circular, so that the processing and molding are convenient, and the demolding of the cast aluminum rotor 8 is also convenient.

In this embodiment, the bottom end of the middle mold 2 is provided with a lower sealing section 22, and the top surface of the lower mold 3 is concavely provided with a lower sealing groove 33 for sealing and matching with the lower sealing section 22; during the assembly, the lower sealing section 22 of the middle mold 2 is inserted into the lower sealing groove 33, the inner wall of the lower sealing groove 33 is in sealing connection with the lower sealing section 22, the air tightness of the middle mold 2 and the lower mold 3 is improved, and aluminum liquid is prevented from leaking from a gap between the middle mold 2 and the lower mold 3.

In this embodiment, the top end of the middle mold 2 is provided with an upper sealing section 23, and the bottom surface of the pressing plate 5 is concavely provided with an upper sealing groove 44 for sealing and matching with the upper sealing section 23. During the equipment, well mould 2's last seal segment 23 cartridge is in last seal groove 44, and the inner wall and the lower seal segment 22 cooperation of going up seal groove 44 are convenient for well mould 2 and clamp plate 5 assemble, have improved position accuracy and stability between well mould 2 and the clamp plate 5.

In this embodiment, the middle mold 2 includes a plurality of middle mold bodies 24, and the plurality of middle mold bodies 24 are detachably connected end to end. Well mould 2 adopts split type structure, has reduced the degree of difficulty of well mould 2 manufacturing on the one hand, is convenient for carry out manufacturing to well mould 2, is convenient for carry out dismouting and maintenance to well mould 2, has reduced the cost of production and maintenance, and on the other hand is convenient for keep, pack and transport well mould 2.

In this embodiment, well mould main part 24 includes circular arc board 25 and sets up in two jam plates 26 of circular arc board 25's lateral wall, and two jam plates 26 are located the both ends of circular arc board 25 respectively, and two adjacent lock plates 26 of well mould main part 24 are connected through locking Assembly. Two adjacent middle die main bodies 24 are locked together through the locking assemblies, so that the two adjacent middle die main bodies 24 are sealed and firmly connected, and the structural stability of the middle die 2 is improved. Preferably, a sealing gasket is arranged between the two adjacent circular arc plates 25 and used for sealing a gap between the two adjacent circular arc plates 25, so that the air tightness of the middle mold 2 is improved, and the problem of aluminum liquid leakage of the middle mold 2 is avoided.

Preferably, the number of the middle die main bodies 24 is three, the three arc plates 25 are enclosed to form a cylindrical barrel, the three arc plates 25 have the same structure, the universality is good, and the maintenance and the processing forming are convenient.

Specifically, the locking plate 26 is provided with a plurality of locking holes 27, and the locking component may be a bolt and a nut screwed with the bolt. After the bolts penetrate through the locking holes 27 of the two locking plates 26, the bolts are in threaded connection through nuts, so that the two adjacent middle die main bodies 24 are locked together; this structural design, easy dismounting, swift connects firmly.

Specifically, the pressing plate 5 is circumferentially provided with a plurality of locking lugs 52, the plurality of locking lugs 52 are arranged around the central axis of the pressing plate 5 in an annular array, and the locking lugs 52 are provided with locking holes 53. Through setting up lockhole 53, the clamp plate 5 of being convenient for is connected with outside die casting machine.

Specifically, the bottom surface of the pressing plate 5 is concavely provided with a positioning hole for accommodating one end of the positioning sleeve 6, and the positioning hole is coaxially arranged with the first through-hole 21. One end, far away from the upper die 4, of the positioning sleeve 6 is inserted into the positioning hole, the inner wall of the positioning hole limits the outer wall of the positioning sleeve 6, and therefore the positioning sleeve 6 is positioned, and the position accuracy and the stability of the positioning sleeve 6 between the pressing plate 5 and the upper die 4 are guaranteed.

Preferably, the outer side wall of the circular arc plate 25 is provided with a positioning block 28 or a heat radiation body, and the positioning block 28 is matched with an external structure to position the middle mold 2 and the cast aluminum mold; the heat radiator effectively radiates the heat of the middle mold 2 and the cast aluminum mold.

Preferably, the cast-aluminum dummy shaft comprises a cylindrical dummy shaft body 1, the dummy shaft body 1 comprises an upper dummy shaft main body 11, a lower dummy shaft main body 12 and a connecting key 13, the upper dummy shaft main body 11 is provided with an upper abutting inclined surface 14, the lower dummy shaft main body 12 is provided with a lower abutting inclined surface 15 matched with the upper abutting inclined surface 14, the connecting key 13 is arranged on the upper abutting inclined surface 14, the lower abutting inclined surface 15 is concavely provided with a key groove 16 matched with the connecting key 13, the key groove 16 extends along the length direction of the lower dummy shaft main body 12, and one end of the upper dummy shaft main body 11 is provided with a cover plate 17 used for abutting one end of the lower dummy shaft main body 12; specifically, the thickness of the upper half dummy shaft body 11 decreases gradually from one end close to the cover plate 17 to the other end, and the thickness of the lower half dummy shaft body 12 increases gradually from one end close to the cover plate 17 to the other end.

When the cast-aluminum dummy shaft is assembled, the upper abutting inclined surface 14 of the upper half dummy shaft main body 11 and the lower abutting inclined surface 15 of the lower half dummy shaft main body 12 are in complementary fit, and meanwhile, the key groove 16 of the lower half dummy shaft main body 12 slides along the connecting key 13 of the upper half dummy shaft main body 11 close to the cover plate 17 until one end of the lower half dummy shaft main body 12 abuts against the cover plate 17, and the cover plate 17 positions the lower half dummy shaft main body 12 to ensure the position accuracy of assembling the lower half dummy shaft main body 12 and the upper half dummy shaft main body 11, so that the assembly of the cast-aluminum dummy shaft is completed. The cast aluminum dummy shaft of the laminated rotor iron core is assembled in the middle die 2 to produce the cast aluminum rotor 8, when the shaft needs to be withdrawn, only the upper half dummy shaft body 1 needs to be tapped, so that the upper contact inclined plane 14 of the upper half dummy shaft body 1 slides along the lower contact inclined plane 15 of the lower half dummy shaft body 1, and in the relative sliding process of the upper half dummy shaft body 1 and the lower half dummy shaft body 1, the outer diameter of the dummy shaft body 1 gradually becomes smaller, so that the cast aluminum dummy shaft can be easily withdrawn from the cast aluminum die main body (the middle die 2, the positioning sleeve 6, the upper die 4, the pressing plate 5 and the lower die 3). This cast aluminium dummy shaft's simple structure, the equipment is convenient, swiftly, it is effectual to rise tightly, can relax and withdraw from cast aluminium mould main part fast, non-deformable, wearing and tearing when moving back the axle are little, reuse rate is high, long service life, the disability rate and the frock cost of cast aluminium dummy shaft have been reduced, can reduce cast aluminium dummy shaft and rotor core's fit clearance, improve the fold of rotor punching and press the regularity, and then can improve the performance of motor, and do not need the water cooling can realize moving back the axle, the water resource has been practiced thrift.

In this embodiment, the upper abutting inclined surface 14 is concavely provided with a mounting groove 18, one end of the connecting key 13 is mounted in the mounting groove 18, and the other end of the connecting key 13 protrudes into the key groove 16. The connecting key 13 is installed in mounting groove 18, and the lateral wall conflict connecting key 13 of mounting groove 18 is in order to carry on spacingly to connecting key 13, is the connecting key 13 installation of being convenient for on the one hand, and on the other hand has improved the stability of connecting key 13 for connecting key 13 can be installed on first false axle main part 11 firmly.

In this embodiment, the cover plate 17 is disc-shaped, the diameter of the cover plate 17 is greater than that of the dummy shaft body 1, the cover plate 17 and the upper dummy shaft body 11 are integrally formed, and compared with the cover plate 17 and the upper dummy shaft body 11 of a split structure, the integrally formed cover plate 17 and the upper dummy shaft body 11 save the process of disassembly and assembly, so that the cover plate 17 and the upper dummy shaft body 11 have high connection strength, a compact structure, and good structural stability.

In this embodiment, the one end that first half dummy shaft main part 11 kept away from apron 17 is provided with hoisting hole 19, through addding hoisting hole 19, is convenient for hang cast aluminium dummy shaft to be convenient for withdraw from cast aluminium mould main part with cast aluminium dummy shaft, after cast aluminium dummy shaft equipment in cast aluminium mould main part, also be convenient for hang cast aluminium mould.

In this embodiment, the one end that lower half dummy shaft main part 12 kept away from apron 17 is provided with hole for hoist 19, through addding hole for hoist 19, is convenient for hang cast aluminium dummy shaft to be convenient for withdraw from cast aluminium mould main part with cast aluminium dummy shaft, after cast aluminium dummy shaft equipment in cast aluminium mould main part, also be convenient for hang cast aluminium mould.

In this embodiment, the hoisting hole 19 is a threaded hole, and the external hanging device can be stably connected with the cast aluminum dummy shaft only by connecting the threaded piece (screw, bolt, etc.) with the threaded hole through threads.

In this embodiment, a molding member 10 is disposed on a side of the upper half dummy shaft main body 11 away from the lower half dummy shaft main body 12, and the molding production of the cast-aluminum rotor 8 is facilitated by additionally arranging the molding member 10.

In this embodiment, a sliding groove 111 is disposed on a side of the upper half dummy shaft main body 11 away from the lower half dummy shaft main body 12, and the forming member 10 includes a sliding plate 101 slidably engaged with the sliding groove 111. During assembly, the sliding plate 101 of the molded part 10 is inserted into the upper half dummy shaft main body 11 along the sliding groove 111, and the side wall of the sliding groove 111 abuts against the sliding plate 101 and limits the sliding plate 101, so as to ensure the stability of the molded part 10 mounted on the upper half dummy shaft main body 11. Through the sliding fit of the sliding groove 111 and the sliding plate 101, the molded part 10 and the upper half dummy shaft main body 11 can be conveniently disassembled and assembled.

In this embodiment, the molding member 10 further includes a taper key 102 connected to a side of the sliding plate 101 away from the upper half shaft body 11, and by providing the taper key 102, the cast aluminum rotor 8 with a tapered slot can be produced.

All the technical features in the embodiment can be freely combined according to actual needs.

The above embodiments are preferred implementations of the present invention, and the present invention can be implemented in other ways without departing from the spirit of the present invention.