CN102688986A - Method for casting squirrel cage rotor with fine copper - Google Patents
Method for casting squirrel cage rotor with fine copper Download PDFInfo
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- CN102688986A CN102688986A CN2012101727739A CN201210172773A CN102688986A CN 102688986 A CN102688986 A CN 102688986A CN 2012101727739 A CN2012101727739 A CN 2012101727739A CN 201210172773 A CN201210172773 A CN 201210172773A CN 102688986 A CN102688986 A CN 102688986A
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- wax
- sand mold
- mold shell
- cage rotor
- sandbox
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Abstract
The invention discloses a method for casting a squirrel cage rotor with fine copper. The method comprises the following steps: 1), coating a high-temperature insulation coating on the iron core of the rotor; 2), sleeving a rubber wax casting die on the iron core of the rotor, casting a wax pattern same with the presupposed squirrel cage rotor in shape, welding precast a sprue wax pattern and a riser wax pattern; 3), making a sand shell outside the iron core of the rotor and wax patterns, solidifying the sand shell, heating to enable a wax die to melt, pouring out wax liquid, and placing the sand shell in a sand box; 4), heating the sand box to 500 to 750 DEG C, pouring copper water with the temperature of 1100 to 1200 DEG C into the sand shell; and 5), removing the sand shell, the sprue and the riser after cooling the sand box so as to obtain the squirrel cage rotor. According to the invention, a lost-wax investment process is adopted to cast a copper squirrel cage rotor, and the rubber wax casting die has low cost and can be used repeatedly; and the squirrel cage rotor prepared by the method has accurate precision, low gas hole ratio and high production efficiency, and is not limited by the power of a motor.
Description
Technical field
The present invention relates to field of motor manufacturing, relate in particular to the method for cage rotor fine copper casting.
Background technology
Because conduction, the heat conductivility of copper are very good, be widely used in and make various electric wires, cable etc., on the cage rotor of cast type alternating current asynchronous induction machine, use less.In recent years, along with the development of motor high efficiency, the research and development of cast copper cage rotor have all been carried out both at home and abroad.At present extrusion processes of using more; For example number of patent application is CN200710066135.8; Patent name is in the patent of invention of " a kind of pressure casting method of induction motor copper cage rotor and die casting equipment "; Disclose a kind of pressure casting method and die casting equipment of inductor motor copper cage rotor, be applicable to the die casting of fine copper and high-copper alloy, belong to non-ferrous metal metallurgy and rolling processing technical field.The pressure casting method of this invention comprises mould preliminary treatment, the melting of copper material, liquation die cast, reaches the hardening refrigerating work procedure.The die casting equipment that the pressure casting method of this invention adopts is made up of die casting machine and melting furnace, and wherein: melting furnace is included as the crucible and the intermediate frequency furnace of one; The die casting machine mould comprises that a plurality of assemblies of inserting of employing are connected.Because the fusing point of copper is high, so above pressure casting method exists the die casting life-span short, the finished product rate is low, and production cost is higher, is unfavorable for the shortcomings such as manufacturing of large rotor.
Summary of the invention
In order to overcome the deficiency of prior art, the object of the present invention is to provide a kind of employing dewax fusible pattern technology, and can overcome the method for the cage rotor fine copper casting of the shortcoming that has die-casting copper cage rotor now.
Technical scheme of the present invention is: a kind of method of cage rotor fine copper casting, said method adopt dewax fusible pattern technology, and it may further comprise the steps:
1) in rotor core, applies one deck high-temperature insulation coating earlier;
2) then at the rubber casting wax pattern tool of sheathed cage rotor in the rotor core of step 1) processing, water the identical wax pattern of cage rotor shape that casts out and preset; After sloughing the casting wax pattern tool, in the end ring position welding of wax pattern downside in advance with the cast gate wax pattern of wax system, the welding of end ring top is in advance with the rising head wax pattern (the double exhaust outlet of doing) of wax system in both sides;
3) outside rotor core and wax pattern, make the sand mold shell, and the sand mold shell is solidified, heating sand mold shell makes the wax pattern fusing, and wax liquid is poured out, and then the sand mold shell is put into sandbox;
4) the heating sandbox makes the temperature of rotor core rise to 500-750 ℃, in the sand mold shell, pours into 1100-1200 ℃ copper water then;
5) treat sandbox cooling after, remove sand mold shell, cast gate and rising head, obtain said cast copper cage rotor.
The raw material of the high-temperaure coating in the said step 1) comprises thin silica flour, fine ceramic powder or other exotic material that waterglass, 250 orders are above, is connected thereby can prevent to produce between the electrical sheet surface of copper that the back pours into and rotor core.
In the step 3), it is to adopt the feeding carbon dioxide that the sand mold shell is solidified fast that said sand mold shell solidifies.
In the step 3), after said sand mold shell is put into sandbox, between sandbox and sand mold shell, tamp sand, be convenient to the fixing of sand mold shell, after also being convenient to back copper water and pouring into the sand mold shell,, also can not cause the casting failure even sand mold shell part is split at present.
In the said step 4), will heat sandbox to 550-750 ℃, main purpose is that iron core is carried out preheating, the flowability of copper water when improving casting; Simultaneously also thorough gasification residual steam and volatile foreign material in rotor core and sand prevent the influence to back copper water pouring operation of above steam and volatile foreign material, thereby improve the quality of products.
In the said step 4), oxidized for preventing high temperature copper water, rotor core preferably should pour into copper water under anoxic or reducing atmosphere.
In the said step 4), said heating sandbox and the operation that in the sand mold shell, pours into 1100-1200 ℃ copper water are all carried out in the coke heating furnace, and the sandbox heating finishes, and the coke heating furnace turns off the blast, and is oxygen deficient atmospheres thereby make in the coke heating furnace.
In the said step 4), said heating sandbox and the operation that in the sand mold shell, pours into 1100-1200 ℃ copper water are all carried out in electric furnace, and the sandbox heating finishes, and feed reducibility gas or inert gas in the electric furnace, make to be reducing atmosphere in the electric furnace.
The existing cage rotor that adopts casting die casting fine copper, because the restriction of equipment volume, the cage rotor power of die casting and adopts the cage rotor of dewax fusible pattern cast fine copper of the present invention in 1,000, the power of the cage rotor of casting is unrestricted.
Adopt the cage rotor of dewax fusible pattern cast fine copper of the present invention, rubber casting wax pattern tool is not only with low cost, be convenient in demoulding, and can repeatedly reuse; The wax pattern of preparation cage rotor is simple to operate on rubber casting wax pattern tool, and the cage rotor precision of preparation is accurate, and production efficiency is high.
Description of drawings
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is done further detailed explanation:
Fig. 1 casts the structural representation of upper cage rotor wax pattern outward for rotor core of the present invention;
Fig. 2 is the structural representation after the sand mold shell has been made in rotor core of the present invention outward;
Fig. 3 is the structural representation of cage rotor horizontal type casting of the present invention;
Fig. 4 is the structural representation of cage rotor vertical casting of the present invention.
The specific embodiment
Below in conjunction with the specific embodiment the present invention is done further detailed explanation.
Shown in one of Fig. 1-4, technical scheme of the present invention is: a kind of method of cage rotor fine copper casting, said method adopt dewax fusible pattern technology, and it may further comprise the steps:
1) in rotor core 1, applies one deck high-temperature insulation coating earlier;
2) as shown in Figure 1, the rubber casting wax pattern tool of sheathed cage rotor in the rotor core of handling through step 1) 1 waters the identical wax pattern 2 of cage rotor shape that casts out with preset then; After sloughing the casting wax pattern tool, in the end ring 3 places welding of wax pattern 2 downsides in advance with the cast gate wax pattern 4 of wax system, end ring 5 top weldings are in advance with the rising head wax pattern 6 (the double exhaust outlet of doing) of wax system in both sides;
3) as shown in Figure 2, outside rotor core 1 and wax pattern 2, to make sand mold shell 7, and sand mold shell 7 is solidified, heating sand mold shell 7 makes the wax pattern fusing, and wax liquid is poured out, and then sand mold shell 7 is put into sandbox 8;
4) heating sandbox 8 makes the temperature of rotor core 1 rise to 500-750 ℃, in sand mold shell 7, pours into 1100-1200 ℃ copper water then;
5) like Fig. 3 or shown in Figure 4, treat sandbox 8 cooling after, remove sand mold shell 7, cast gate and rising head, obtain said cast copper cage rotor 9.
The casting of cage rotor horizontal type
The method of cage rotor casting fine copper, said method adopts dewax fusible pattern technology, and it may further comprise the steps:
1) in rotor core 1, applies one deck high-temperature insulation coating earlier;
2) then at the rubber casting wax pattern tool of sheathed cage rotor in the rotor core 1 of step 1) processing, water the identical wax pattern 2 of cage rotor shape that casts out and preset; After sloughing the casting wax pattern tool, in the end ring 3 places welding of wax pattern 2 downsides in advance with the cast gate wax pattern 4 of wax system 2, end ring 5 top weldings are in advance with the rising head wax pattern 6 (the double exhaust outlet of doing) of wax system in both sides;
3) outside rotor core 1 of laterally placing and wax pattern, make sand mold shell 7; Feed carbon dioxide sand mold shell 7 is solidified fast, heat sand mold shell 7 then and make the wax pattern fusing, and wax liquid is poured out; Then sand mold shell 7 is put into sandbox 8, and tamp sand 10 at sandbox and 7 on 8 sand mold shells;
4) sandbox 8 and rotor core 1 are put into electric furnace; And heating sandbox 8 makes rotor core 1 be warming up to 500-750 ℃; Thorough gasification residual steam and volatile foreign material in rotor core 1 and sand 10, sand mold shell 7 pours into 1100-1200 ℃ copper water in the carbon monoxide reducing atmosphere then;
5) treat sandbox 8 cooling after, remove sand mold shell 7, cast gate and rising head, obtain said cast copper cage rotor 9.
The method of cage rotor casting fine copper, said method adopts dewax fusible pattern technology, and it may further comprise the steps:
1) in rotor core 1, applies one deck high-temperature insulation coating earlier;
2) then at the rubber casting wax pattern tool of sheathed cage rotor in the rotor core 1 of step 1) processing, water the identical wax pattern 2 of cage rotor shape that casts out and preset; After sloughing the casting wax pattern tool, in the end ring 3 places welding of wax pattern 2 downsides in advance with the cast gate wax pattern 4 of wax system, end ring 5 top weldings are in advance with the rising head wax pattern 6 (the double exhaust outlet of doing) of wax system in both sides;
3) outside rotor core 1 of laterally placing and wax pattern, make sand mold shell 7; Feed carbon dioxide sand mold shell 7 is solidified fast, heat sand mold shell 7 then and make the wax pattern fusing, and wax liquid is poured out; Then sand mold shell 7 is put into sandbox 8, and tamp sand 10 at sandbox 8 and 7 on sand mold shell;
4) sandbox 8 and rotor core 1 are put into the coke heating furnace; Heating sandbox 8 makes rotor core 1 be warming up to 500-750 ℃; Residual steam and volatile foreign material in rotor core 1 and sand 10 thoroughly gasify; The coke heating furnace turns off the blast then, makes the coke heating furnace be anaerobic condition, pours into 1100-1200 ℃ copper water in the sand mold shell 7;
5) treat sandbox 8 cooling after, remove sand mold shell 7, cast gate and rising head, obtain said cast copper cage rotor 9.
The cage rotor vertical casting
The method of cage rotor casting fine copper, said method adopts dewax fusible pattern technology, and it may further comprise the steps:
1) in rotor core 1, applies one deck high-temperature insulation coating earlier;
2) then at the rubber casting wax pattern tool of sheathed cage rotor in the rotor core 1 of step 1) processing, water the identical wax pattern 2 of cage rotor shape that casts out and preset; After sloughing the casting wax pattern tool, in the prefabricated rising head wax pattern 4 of upside end ring 3 top weldings, in the prefabricated cast gate wax pattern 6 of the end ring 5 places welding of wax-pattern downside;
3) outside rotor core 1 of vertically placing and wax pattern, prepare sand mold shell 7; Feed carbon dioxide sand mold shell 7 is solidified fast, heat sand mold shell 7 then and make the wax pattern fusing, and wax liquid is poured out; Then sand mold shell 7 is put into sandbox 8, and tamp sand 10 at sandbox 8 and 7 on sand mold shell;
4) sandbox 8 and rotor core 1 are put into the coke heating furnace; Heating sandbox 8 makes rotor core 1 be warming up to 500-750 ℃; Residual steam and volatile foreign material in rotor core 1 and sand 10 thoroughly gasify; The coke heating furnace turns off the blast then, makes the coke heating furnace be anaerobic condition, pours into 1100-1200 ℃ copper water in the sand mold shell 7;
5) treat sandbox 8 cooling after, remove sand mold shell 7, cast gate and rising head, obtain said cast copper cage rotor 9.
The method of cage rotor casting fine copper, said method adopts dewax fusible pattern technology, and it may further comprise the steps:
1) in rotor core 1, applies one deck high-temperature insulation coating earlier;
2) the rubber casting wax pattern tool of sheathed cage rotor in the rotor core of handling through step 1) 1 then; Water and cast out the wax pattern 2 identical with the cage rotor shape; After sloughing the casting wax pattern tool; In the prefabricated rising head wax pattern 4 of upside end ring 3 top weldings, in the prefabricated cast gate wax pattern 6 of the end ring 5 places welding of wax pattern downside; 3) the sand mold shell 7 that is prepared by quartz sand is set outside rotor core 1 of vertically placing and wax pattern; Feeding carbon dioxide solidifies sand mold shell 7 fast; Heat sand mold shell 7 then and make the wax pattern fusing; And wax liquid poured out, then sand mold shell 7 is put into sandbox 8, and tamp sand 10 at sandbox 8 and 7 on sand mold shell;
4) sandbox 8 and rotor core 1 are put into electric furnace; And heating sandbox 8 makes rotor core 1 be warming up to 500-750 ℃; Thorough gasification residual steam and volatile foreign material in rotor core 1 and sand 9, sand mold shell 7 pours into 1100-1200 ℃ copper water in the carbon monoxide reducing atmosphere then;
5) treat sandbox 8 cooling after, remove sand mold shell 7, cast gate and rising head, obtain said cast copper cage rotor 9.
Claims (6)
1. the method for cage rotor fine copper casting, it is characterized in that: said method adopts dewax fusible pattern technology, and it may further comprise the steps:
1) in rotor core, applies one deck high-temperature insulation coating earlier;
2) then at the rubber casting wax pattern tool of sheathed cage rotor in the rotor core of step 1) processing, water the identical wax pattern of cage rotor shape that casts out and preset; After sloughing the casting wax pattern tool, in the end ring position welding of wax pattern downside in advance with the cast gate wax pattern of wax system, the welding of end ring top is in advance with the rising head wax pattern of wax system in both sides;
3) outside rotor core and wax pattern, make the sand mold shell, and the sand mold shell is solidified, heating sand mold shell makes the wax pattern fusing, and wax liquid is poured out, and then the sand mold shell is put into sandbox;
4) the heating sandbox makes the temperature of rotor core rise to 500-750 ℃, in the sand mold shell, pours into 1100-1200 ℃ copper water then;
5) treat sandbox cooling after, remove sand mold shell, cast gate and rising head, obtain said cast copper cage rotor.
2. the method for cage rotor fine copper casting according to claim 1 is characterized in that: the raw material of the high-temperaure coating in the said step 1) comprises waterglass, above thin silica flour or the fine ceramic powder of 250 orders.
3. the method for cage rotor fine copper casting according to claim 1 is characterized in that: in the step 3), it is to adopt the feeding carbon dioxide that the sand mold shell is solidified fast that said sand mold shell solidifies.
4. the method for cage rotor fine copper casting according to claim 1 is characterized in that: in the step 3), after said sand mold shell is put into sandbox, between sandbox and sand mold shell, tamp sand.
5. the method for cage rotor fine copper casting according to claim 1; It is characterized in that: in the said step 4); Said heating sandbox and the operation that in the sand mold shell, pours into 1100-1200 ℃ copper water are all carried out in the coke heating furnace, and the sandbox heating finishes, and the coke heating furnace turns off the blast.
6. the method for cage rotor fine copper casting according to claim 1; It is characterized in that: in the said step 4); Said heating sandbox and the operation that in the sand mold shell, pours into 1100-1200 ℃ copper water are all carried out in electric furnace; The sandbox heating finishes, and feeds reducibility gas or inert gas in the electric furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101727739A CN102688986A (en) | 2012-05-30 | 2012-05-30 | Method for casting squirrel cage rotor with fine copper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101727739A CN102688986A (en) | 2012-05-30 | 2012-05-30 | Method for casting squirrel cage rotor with fine copper |
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| Publication Number | Publication Date |
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| CN102688986A true CN102688986A (en) | 2012-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101727739A Pending CN102688986A (en) | 2012-05-30 | 2012-05-30 | Method for casting squirrel cage rotor with fine copper |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103203445A (en) * | 2013-03-29 | 2013-07-17 | 福建尤迪电机制造有限公司 | Preparation method of cast copper cage rotor |
| CN103785795A (en) * | 2014-01-15 | 2014-05-14 | 洛阳轴研科技股份有限公司 | Casting method for solid cage rotor |
| CN103949611A (en) * | 2014-01-15 | 2014-07-30 | 洛阳轴研科技股份有限公司 | Casting method of open slot copper rotor of electric main shaft |
| CN108330293A (en) * | 2018-04-09 | 2018-07-27 | 浙江钜丰冲压科技有限公司 | A kind of copper smelting method being exclusively used in motor copper rotor |
-
2012
- 2012-05-30 CN CN2012101727739A patent/CN102688986A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103203445A (en) * | 2013-03-29 | 2013-07-17 | 福建尤迪电机制造有限公司 | Preparation method of cast copper cage rotor |
| CN103203445B (en) * | 2013-03-29 | 2016-09-21 | 福建尤迪电机制造有限公司 | A kind of preparation method of cast copper cage rotor |
| CN103785795A (en) * | 2014-01-15 | 2014-05-14 | 洛阳轴研科技股份有限公司 | Casting method for solid cage rotor |
| CN103949611A (en) * | 2014-01-15 | 2014-07-30 | 洛阳轴研科技股份有限公司 | Casting method of open slot copper rotor of electric main shaft |
| CN103949611B (en) * | 2014-01-15 | 2017-01-04 | 洛阳轴研科技股份有限公司 | A kind of casting method of electro spindle open slot copper rotor |
| CN108330293A (en) * | 2018-04-09 | 2018-07-27 | 浙江钜丰冲压科技有限公司 | A kind of copper smelting method being exclusively used in motor copper rotor |
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Owner name: FUZHOU YILU CHANGXING POWERTRAIN TECHNOLOGIES CO., Free format text: FORMER OWNER: FUJIAN UDE ELECTRICAL MACHINE CO., LTD. Effective date: 20150105 |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Free format text: CORRECT: ADDRESS; FROM: 355000 NINGDE, FUJIAN PROVINCE TO: 350003 FUZHOU, FUJIAN PROVINCE |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20150105 Address after: Section 61 Street Road, Gulou District of Fuzhou city in Fujian province 350003 C Jiasheng Plaza No. 28 floor 15 room 05 Applicant after: A way to navigate Fuzhou Power Technology Co. Address before: 355000 Fu'an City, Ningde province Fujian city Chengyang Xiang Qin small stream foreign industrial zone Applicant before: Fujian Youdi Motor Manufacturing Co.,Ltd. |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120926 |