CN102386731A - Die-casting method for high-accuracy coreless motor rotor - Google Patents
Die-casting method for high-accuracy coreless motor rotor Download PDFInfo
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- CN102386731A CN102386731A CN2011103447600A CN201110344760A CN102386731A CN 102386731 A CN102386731 A CN 102386731A CN 2011103447600 A CN2011103447600 A CN 2011103447600A CN 201110344760 A CN201110344760 A CN 201110344760A CN 102386731 A CN102386731 A CN 102386731A
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Abstract
The invention discloses a die-casting method for a high-accuracy coreless motor rotor. A die used for the method comprises an upper pressure head (1). A sprue gate (2) is formed in the upper pressure head (1). A charging chamber (3) is formed below the upper pressure head, and is provided with a cylindrical cavity. The lower outer wall of the charging chamber (3) is provided with an inward lug boss which is in fit connection with a housing washer (5). A die core (4) is inserted into the cavity of the charging chamber (3). Molten metal (8) is accommodated in a gap between the cavity of the charging chamber (3) and the die core (5). A lower pressure head has a hollow structure. The inner wall of the lower pressure head (6) is in fit connection with the die core (4). The outer wall of the lower pressure head (6) is in fit connection with the cavity of the charging chamber (3). The lower part of the die core (4) is provided with a compression spring (7). The method comprises the following steps of: assembling the die, pouring the molten metal, making an upper hydraulic head of a two-way press contact the upper pressure head of the die, and pressing a lower hydraulic head of the two-way press towards the lower pressure head of the die and executing die-casting operations by using the lower hydraulic head.
Description
Technical field
The present invention relates to field of motor manufacturing, particularly a kind of pressure casting method of high accuracy drag cup rotor.
Background technology
In the manufacturing process of drag cup rotor, the circular runout of rotor is an important indicator that influences motor performance.Present manufacturing frock circular runout is in 0.18～0.25 scope.Because circular runout is bigger, the dynamic balancing of rotor is bad, vibrates during the motor operation.The principal element that present manufacturing frock influences circular runout has following reason: the one, and the location of rotor in moulds of industrial equipment is to realize through the location hole of armature spindle in the core rod of encapsulating mould, under the condition of high temperature, the wearing and tearing of location hole are very fast.The 2nd, because the diameter of armature spindle is generally in the scope of 3～6mm, and armature spindle length is 8～9 times of diameter, belongs to the processing of overlength aperture, and machining accuracy is difficult to guarantee.The 3rd, axle is difficult to grasp with the reasonable supporting clearance in hole, and the location can not guarantee when the gap was big; The gap is too little, and axle is transferred to from rotor easily during depanning.
Summary of the invention
To the deficiency of prior art, one of the object of the invention is to provide a kind of pressure casting method of high accuracy drag cup rotor, and this method can guarantee the axiality requirement of rotor, the good dynamic balance of rotor, and it is little during the motor operation vibration to take place.
For realizing above-mentioned purpose, the technical scheme that the present invention adopts is:
A kind of pressure casting method of high accuracy drag cup rotor, the used mould of this method comprises seaming chuck, has the sprue gate in the seaming chuck; The seaming chuck below is the material chamber, and the material chamber has cylindric inner chamber, and material bottom, chamber outer wall has inside concave station; This concave station and seat ring are connected, and expect that indoor chamber is installed with core rod, expect that the space between indoor chamber and the core rod holds molten metal bath; Push-down head is a hollow structure; Push-down head inwall and core rod are connected, and the push-down head outer wall is connected with the inner chamber of material chamber, and the bottom of core rod is provided with compressible spring; The step of described pressure casting method is:
1) push-down head is placed on the following fluid head of two-way press; Put into spring in the empty therein then inner chamber; Again seat ring is placed on the platform of press, core rod is contacted with the inner chamber assembling of push-down head and with spring, will expect that then the chamber is placed on the seat ring; And its inner chamber is contacted with the cooperation of push-down head outer wall, put the seaming chuck that has the sprue gate on the top of material chamber at last;
2) casting of molten metal, and the last fluid head of two-way press moved down, it is contacted with the seaming chuck of mould; And it is motionless to keep going up fluid head;
3) the following fluid head of the two-way press of startup makes its push-down head that passes through mould carry out die casting operation, and the concrete technology of die casting gets final product by routine.
In the die casting of aforesaid high accuracy drag cup rotor, the axiality of said material chamber and said seat ring is 0.01-0.15mm.
In the die casting of aforesaid high accuracy drag cup rotor, said core rod external diameter is less than rotor lining axis hole final size 0.2～0.3mm.
The beneficial effect of the inventive method is:
1. compared with prior art, die casting of the present invention with the benchmark of material chamber as processing and assembling, therefore can well guarantee the axiality requirement of rotor finished product axle and cup all the time when die casting drag cup rotor.Mould of the present invention preparation drag cup rotor runout tolerance can be controlled in the 0.05mm.Motor assembling back good dynamic balance, motor operates steadily, and the vibrations of motor are controlled.
2. said method process is simple, and shirtsleeve operation can guarantee the requirement of axiality.
Description of drawings
Fig. 1 is the used mould of pressure casting method of high accuracy drag cup rotor of the present invention, and among the figure, 1 is seaming chuck, and 2 is the sprue gate, and 3 are the material chamber, and 4 is core rod, and 5 is seat ring, and 6 is push-down head, and 7 is compressible spring, and 8 is molten metal bath.
Below in conjunction with accompanying drawing the present invention is further specified.
Embodiment
Embodiment one
A kind of pressure casting method of high accuracy drag cup rotor, the used mould of this method comprises seaming chuck 1, has sprue gate 2 in the seaming chuck 1; The seaming chuck below is material chamber 3, and material chamber 3 has cylindric inner chamber, and material chamber 3 bottom outer walls have inside concave station; This concave station and seat ring 5 are connected, and material chamber 3 inner chambers are installed with core rod 4, and the space between material chamber 3 inner chambers and the core rod 4 holds molten metal bath 8; Push-down head 6 is a hollow structure; Push-down head 6 inwalls and core rod 4 are connected, and push-down head 6 outer walls are connected with the inner chamber of material chamber 3, and the bottom of core rod 4 is provided with compressible spring 7; The axiality of wherein said material chamber and said centre circle is 0.01mm, and said core rod external diameter is less than rotor lining axis hole final size 0.3mm; The step of described pressure casting method is:
1) push-down head is placed on the following fluid head of two-way press; Put into spring in the empty therein then inner chamber; Again seat ring is placed on the platform of press, core rod is contacted with the inner chamber assembling of push-down head and with spring, will expect that then the chamber is placed on the seat ring; And its inner chamber is contacted with the cooperation of push-down head outer wall, put the seaming chuck that has the sprue gate on the top of material chamber at last;
2) casting of molten metal, and the last fluid head of two-way press moved down, it is contacted with the seaming chuck of mould; And it is motionless to keep going up fluid head;
3) the following fluid head of the two-way press of startup makes its push-down head that passes through mould carry out die casting operation, and the concrete technology of die casting gets final product by routine.
Embodiment two
A kind of pressure casting method of high accuracy drag cup rotor, the used mould of this method comprises seaming chuck 1, has sprue gate 2 in the seaming chuck 1; The seaming chuck below is material chamber 3, and material chamber 3 has cylindric inner chamber, and material chamber 3 bottom outer walls have inside concave station; This concave station and seat ring 5 are connected, and material chamber 3 inner chambers are installed with core rod 4, and the space between material chamber 3 inner chambers and the core rod 4 holds molten metal bath 8; Push-down head 6 is a hollow structure; Push-down head 6 inwalls and core rod 4 are connected, and push-down head 6 outer walls are connected with the inner chamber of material chamber 3, and the bottom of core rod 4 is provided with compressible spring 7; The axiality of wherein said material chamber and said centre circle is 0.015mm, and said core rod external diameter is less than rotor lining axis hole final size 0.2mm; The step of described pressure casting method is:
1) push-down head is placed on the following fluid head of two-way press; Put into spring in the empty therein then inner chamber; Again seat ring is placed on the platform of press, core rod is contacted with the inner chamber assembling of push-down head and with spring, will expect that then the chamber is placed on the seat ring; And its inner chamber is contacted with the cooperation of push-down head outer wall, put the seaming chuck that has the sprue gate on the top of material chamber at last;
2) casting of molten metal, and the last fluid head of two-way press moved down, it is contacted with the seaming chuck of mould; And it is motionless to keep going up fluid head;
3) the following fluid head of the two-way press of startup makes its push-down head that passes through mould carry out die casting operation, and the concrete technology of die casting gets final product by routine.
Embodiment three
A kind of pressure casting method of high accuracy drag cup rotor, the used mould of this method comprises seaming chuck 1, has sprue gate 2 in the seaming chuck 1; The seaming chuck below is material chamber 3, and material chamber 3 has cylindric inner chamber, and material chamber 3 bottom outer walls have inside concave station; This concave station and seat ring 5 are connected, and material chamber 3 inner chambers are installed with core rod 4, and the space between material chamber 3 inner chambers and the core rod 4 holds molten metal bath 8; Push-down head 6 is a hollow structure; Push-down head 6 inwalls and core rod 4 are connected, and push-down head 6 outer walls are connected with the inner chamber of material chamber 3, and the bottom of core rod 4 is provided with compressible spring 7; The axiality of wherein said material chamber and said centre circle is 0.012mm, and said core rod external diameter is less than rotor lining axis hole final size 0.25mm; The step of described pressure casting method is:
1) push-down head is placed on the following fluid head of two-way press; Put into spring in the empty therein then inner chamber; Again seat ring is placed on the platform of press, core rod is contacted with the inner chamber assembling of push-down head and with spring, will expect that then the chamber is placed on the seat ring; And its inner chamber is contacted with the cooperation of push-down head outer wall, put the seaming chuck that has the sprue gate on the top of material chamber at last;
2) casting of molten metal, and the last fluid head of two-way press moved down, it is contacted with the seaming chuck of mould; And it is motionless to keep going up fluid head;
3) the following fluid head of the two-way press of startup makes its push-down head that passes through mould carry out die casting operation, and the concrete technology of die casting gets final product by routine.
Applicant's statement; The present invention explains detailed process equipment of the present invention and technological process through the foregoing description; But the present invention is not limited to above-mentioned detailed process equipment and technological process, does not mean that promptly the present invention must rely on above-mentioned detailed process equipment and technological process could be implemented.The person of ordinary skill in the field should understand, and to any improvement of the present invention, to the interpolation of the equivalence replacement of each raw material of product of the present invention and auxiliary element, the selection of concrete mode etc., all drops within protection scope of the present invention and the open scope.
Claims (3)
1. the pressure casting method of a high accuracy drag cup rotor is characterized in that, the used mould of this method comprises seaming chuck (1); Have sprue gate (2) in the seaming chuck (1), the seaming chuck below is material chamber (3), and material chamber (3) has cylindric inner chamber; Material bottom, chamber (3) outer wall has inside concave station, and this concave station and seat ring (5) are connected, and material chamber (3) inner chamber is installed with core rod (4); Space between material chamber (3) inner chamber and the core rod (4) holds molten metal bath (8), and push-down head (6) is a hollow structure, and push-down head (6) inwall and core rod (4) are connected; Push-down head (6) outer wall is connected with the inner chamber of material chamber (3), and the bottom of core rod (4) is provided with compressible spring (7); The step of described pressure casting method is:
1) push-down head (6) is placed on the following fluid head of two-way press; Put into spring (7) in the empty therein then inner chamber; Again seat ring (5) is placed on the platform of press, core rod (4) is contacted with the inner chamber assembling of push-down head (6) and with spring (7), will expect that then chamber (3) is placed on the seat ring (5); And its inner chamber is contacted with the cooperation of push-down head (6) outer wall, put the seaming chuck (1) that has sprue gate (2) on the top of material chamber (3) at last;
2) casting of molten metal, and the last fluid head of two-way press moved down, it is contacted with the seaming chuck (1) of mould; And it is motionless to keep going up fluid head;
3) the following fluid head of the two-way press of startup makes its push-down head through mould (6) carry out the die casting operation, and the concrete technology of die casting gets final product by routine.
2. the pressure casting method of high accuracy drag cup rotor as claimed in claim 1 is characterized in that, said material chamber (3) is 0.01-0.15mm with the axiality of said seat ring (5).
3. the pressure casting method of high accuracy drag cup rotor as claimed in claim 1 is characterized in that, said core rod (4) external diameter is less than rotor lining axis hole final size 0.2～0.3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103447600A CN102386731A (en) | 2011-11-03 | 2011-11-03 | Die-casting method for high-accuracy coreless motor rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103447600A CN102386731A (en) | 2011-11-03 | 2011-11-03 | Die-casting method for high-accuracy coreless motor rotor |
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| Publication Number | Publication Date |
|---|---|
| CN102386731A true CN102386731A (en) | 2012-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103447600A Pending CN102386731A (en) | 2011-11-03 | 2011-11-03 | Die-casting method for high-accuracy coreless motor rotor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103701268A (en) * | 2013-12-31 | 2014-04-02 | 深圳市双环全新机电股份有限公司 | Assembly machine for automatically assembling spool and rotor frame |
-
2011
- 2011-11-03 CN CN2011103447600A patent/CN102386731A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103701268A (en) * | 2013-12-31 | 2014-04-02 | 深圳市双环全新机电股份有限公司 | Assembly machine for automatically assembling spool and rotor frame |
| CN103701268B (en) * | 2013-12-31 | 2017-01-25 | 深圳市双环全新机电股份有限公司 | Assembly machine for automatically assembling spool and rotor frame |
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Application publication date: 20120321 |