CN107282886A - A kind of aluminium alloy lost foam casting technique of built-in spiral coil water channel - Google Patents
A kind of aluminium alloy lost foam casting technique of built-in spiral coil water channel Download PDFInfo
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- CN107282886A CN107282886A CN201610206740.XA CN201610206740A CN107282886A CN 107282886 A CN107282886 A CN 107282886A CN 201610206740 A CN201610206740 A CN 201610206740A CN 107282886 A CN107282886 A CN 107282886A
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- water channel
- spiral coil
- aluminium alloy
- coil water
- motor casing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/0072—Casting in, on, or around objects which form part of the product for making objects with integrated channels
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The invention discloses a kind of aluminium alloy lost foam casting technique of built-in spiral coil water channel, it first precasts a stainless steel or spiral coil water channel made of copper, the upper and lower ends of spiral coil water channel are respectively equipped with the water inlet and delivery port that can expose from motor casing cylinder, utilize foaming mould positioning molding, one-shot forming includes the white moulds of Integral motor casing EPS of prefabricated spiral coil pipe water channel with regard to that can process, poured again by lost foam casting process and outpour the internal aluminium alloy electric casing for being inlaid with prefabricated spiral coil pipe water channel, spiral coil water channel is provided with the supplementary structure that can be combined closely with cast aluminium alloy gold housing, reduce the internal stress that cold and hot change is produced, housing is avoided to ftracture, spiral coil water channel is also associated with casting technique support frame, can be in high volume, reliable and stable utilization lost foam casting has the aluminium alloy electric casing of built-in spiral channel, sand need not be filled out before casting in prefabricated spiral coil pipe water channel, water channel smoothness is not easily blocked, ensure good cooling results.
Description
Technical field
The present invention relates to new energy motor casing production technical field, more particularly to a kind of aluminium alloy lost foam casting technique of built-in spiral coil water channel.
Background technology
New-energy automobile is the electric automobile for using electric energy for power, driven by power and control system are the cores of electric automobile, motor is driven by power and control system important component, motor caloric value in operation process is big, in order to ensure operation that electric automobile can be continual and steady, need to cool down motor in operation process, in order to ensure cooling effect, it is preferably able to design and uses the motor casing with Water-cooling circulating passage, it is typically that the spiral water-cooling circulation canal with preferable cooling effect is set in motor casing at present, because aluminium alloy electric casing belongs to baroque thin-walled parts, the spiral water-cooling circulation canal sectional area set in the electric machine casing that aluminium alloy is cast is smaller, spiral number of turns are more, it is high to product size required precision that fabrication design manufactures spiral water-cooling circulation canal, the classification of waterproof of housing will reach more than IP67 grades, it is required that the housing of casting can not have any sand holes, the defects such as pin hole, there is problems with using traditional casting technique：
Pre-buried core is needed when the 1st, pouring into a mould, and the intensity of the small spiral core of this sectional area is relatively low, spiral core is easily broken off during cast, causes the spiral water-cooling circulation canal in motor casing to be difficult to effective shaping, it is difficult to which batch micro operations go out qualified product；
If the 2, improving spiral sand core strength using binding agent etc., after the completion of casting, because the collapsibility of the high spiral core of intensity is again very poor, the spiral core in the motor casing cast is caused to be difficult to take out from spiral water-cooling circulation canal, residual sand can be left in spiral water-cooling circulation canal, residual sand easily blocks Water-cooling circulating passage, influences cooling effect；
3rd, the wall thickness of motor casing is very thin, and typically in 5mm or so, casting, core is easily eccentric, causes the heavy wall of motor casing uneven, causes leak risk high during machining；
Need to make many steam vents when the 4th, pouring into a mould using core, cause there are many fabrication holes on motor casing, then need to be shut with plug, there is disclosure risk, and product is also unsightly；
5th, the residual sand workload in later stage manual cleaning spiral water-cooling circulation canal is big, and labour cost is high.
It is usually using low pressure casting, counter-pressure casting or the accurate aluminium alloy casting electric machine casing of lost foam casting process production at present based on problem above.
Lost foam casting is particularly those and uses the bad parting of ordinary sand casting, bad die sinking, the casting of bad lower core to the extremely well-adapted of casting structure, can be achieved without surplus, precise forming, without molding, matched moulds, without core, group core during casting；The dimensional accuracy of casting is high, surface roughness value is low, require low to workman, the features such as working condition is good, is particularly suitable for use in needing the housing class castings production more than core during complicated, conventional cast.
When casting the aluminium alloy electric casing with spiral water-cooling circulation canal using lost foam casting process, need to process consistent EPS tunica albugineas corresponding with motor casing in advance, due to being also required to set corresponding spiral circulation cavity in EPS tunica albugineas, and the EPS tunica albugineas of this structure can not simultaneous manufacturing go out, mould foaming processing could be carried out by needing EPS tunica albugineas being divided into several parts, need that the EPS tunica albugineas of several parts are bonded together into an entirety again after shaping, cause whole EPS tunica albugineas processing trouble, production cycle long；And also need to that the spiral circulation cavity in EPS tunica albugineas individually shake in moulding to fill out sand, ensure to be full of molding sand in EPS tunica albuginea spiral circulations cavity, otherwise easily there are bad products, in a word, this lost foam casting process is more complicated, processing charges is high, it is desirable to further improve product structure and production technology, so as to preferably ensure product quality and reduce production cost.
The content of the invention
To overcome the deficiencies in the prior art, the invention provides the aluminium alloy lost foam casting technique of a kind of casting accuracy height, the built-in spiral coil water channel that product defects is few, production efficiency is high.
In order to solve the above technical problems, the invention provides a kind of aluminium alloy lost foam casting technique of built-in coil pipe water channel, it comprises the following steps：
Step 01：It is prepared by spiral coil water channel：Flat tube or the rigid spiral coil water channel of pipe coiling one are used according to product structure, the upper and lower ends side of spiral coil water channel is respectively equipped with water inlet and delivery port；
Step 02：It is prepared by the white mould moulds of motor casing EPS：According to product structure and spiral coil channel structure, design processes the white mould moulds of motor casing EPS that can be stably fixed at spiral coil water channel in the white moulds of EPS；
Step 03：Prefoam and tunica albuginea shaping：Eps foam bead prefoam, eps foam bead after foaming is added in tunica albuginea forming machine, prepare that appearance is uniform and smooth, the constitutionally stable motor casing tunica albuginea for including spiral coil water channel using the white mould moulds of motor casing EPS, the water inlet and delivery port for preparing rear screw coil pipe water channel stretch out from the cylinder of motor casing tunica albuginea, then again dry motor casing tunica albuginea；
Step 04：Swabbing：The bottom gating system in connection in the white mould of motor casing of forming, then fireproof coating is hung up in the white mould surface of motor casing, ensure that fireproof coating coating is uniform, white without hanging, then the white mould of the motor casing for brushing coating be put into drying in drying room to obtain motor casing casting pattern；
Step 05：Husky moulding is buried in vibrations：The dry motor casing casting pattern finished is positioned in plain jolter, notes husky using rain type, layering addition molding sand, when adding, ram-jolt carries out moulding, ram-jolt time 30s-65s；
Step 06：Cast molding：Cast using the model that it is good to jolt moulding that bottom filling casts mode, 740-810 DEG C of cast temperature, casting time is more than 20s, the water inlet and delivery port for pouring into a mould rear screw coil pipe water channel stretch out from the cylinder of motor casing；
Step 07：Blast cleaning：The complete cooled and solidified of aluminium water is specially treated, the aluminium alloy electric casing that has cast is obtained by blast cleaning again after sand removal；
Step 08：Heat treatment：The aluminium alloy electric casing of built-in coil pipe water channel to having cast carries out T6 heat treatments, obtains aluminium alloy electric casing to be processed.
Spiral coil water channel in the step 01 is higher than the metal spiral coil pipe water channel of cast aluminium alloy gold fusing point for fusing point, the metal spiral coil pipe water channel preferentially uses stainless steel spiral coil water channel or copper spiral coil water channel, it would however also be possible to employ fusing point is higher than the fire resistant aluminum alloy spiral coil water channel of cast aluminium alloy gold；It is poor using the melting temperature of different metal, it is ensured that when aluminium alloy is poured into a mould, spiral coil water channel will not melt deformation.
Spiral coil water channel in the step 01 is connected with the processing support skeleton for being easy to tunica albuginea shaping, the processing support skeleton is also cast in aluminium alloy electric casing, one end of the processing support skeleton is exposed from one end of aluminium alloy electric casing, and the bared end of the processing support skeleton is connected with the lower end of bottom gating system；By setting processing support skeleton to be easy to spiral coil water channel positioning molding in the white moulds of motor casing EPS, also it is avoided that in evaporative pattern casting process that motor casing casting pattern walks bias, and is more favorable for stainless steel or spiral coil water channel made of copper is combined with alloy electric machine shell phase.
The surface of spiral coil water channel in the step 01, which is provided with, to be easy to combine aluminium alloy and stainless steel or the pit or pit of copper.
The outer surface of spiral coil water channel in the step 01 is provided with lumpy crest line or groove.
The outer surface of spiral coil water channel in the step 01, which is provided with, to be easy to combine aluminium alloy and stainless steel or the cladding steel wire of copper.
The present invention is by setting the supplementary structure such as pit or pit, lumpy crest line or groove and cladding steel wire, the aluminium alloy being cast in outside spiral coil water channel is set to be combined with stainless steel or copper spiral coil water channel even closer, the internal stress produced when two kinds of different heat expansion coefficient metal materials are combined together by cold and hot change can be reduced, it is to avoid expand with heat and contract with cold and cause electric machine casing to ftracture.
The specification of the flat tube in spiral coil water channel in the step 01 is：25 x
7 x 0.3mm, the rotation direction and spiral quantity, pitch of spiral coil water channel prepared by flat tube are set according to motor casing size and power of motor.
The specification of the pipe in spiral coil water channel in the step 01 is：φ7 x
0.3mm, the rotation direction and spiral quantity, pitch of spiral coil water channel prepared by pipe are set according to motor casing size and power of motor.
The present invention passes through a prefabricated stainless steel or spiral coil water channel made of copper, prefabricated spiral coil water channel is molded in the white moulds of motor casing EPS, as long as one-shot forming includes the white moulds of Integral motor casing EPS of prefabricated spiral coil pipe water channel with regard to that can process, EPS tunica albugineas need not be divided into several parts again bond again after being separately molded, include prefabricated spiral coil pipe water channel motor casing tunica albuginea prepare after, sand is filled out in the single vibrations of water channel cavity progress that need not be again to motor casing EPS Bai Monei before casting, after casting also cleaning is needed inside motor casing without core, processing technology is more succinct reliable, reduce the white mould foaming molding mold quantity of EPS, save EPS tunica albuginea adhesive solidifications, sand is filled out in vibrations, the non-cutting times such as sand removal, productive temp significantly shortens, effectively increase production efficiency；The suitable casting spiral channel diameter of lost foam casting process of the present invention is big, the embedded with spiral coil pipe water channel that spiral number of turns are more, spiral channel sectional area is small water cooling motor housing, motor casing inner chamber draft angle after casting is small, 5mm is reached after cast wall, allowance is small, Product Precision is high.
The present invention is by rationally setting water inlet and outlet structure on processing support skeleton and spiral coil water channel, by increasing capacitance it is possible to increase electric machine casing intensity, it is to avoid deformation and cracking；Using bottom filling casting mode in evaporative pattern casting process, what spiral coil water channel can gradually be stablized from top to bottom is coated in aluminium water, spiral coil water channel accurate positioning, it will not shift, expose in processing support skeleton, water inlet and delivery port does not influence motor casing to install and use in motor casing outer portion.
In summary, the beneficial effects of the invention are as follows：After said structure, by setting a prefabricated stainless steel spiral coil water channel in alloy electric machine housing, prefabricated stainless steel spiral coil water channel need not divide the white moulds of motor casing EPS of shaping manufacture several times in lost foam casting process, also without filling out sand inside water channel, water channel smoothness is not easily blocked, ensure Water-cooling circulating passage good cooling results in motor casing, by rationally setting water inlet and outlet structure on processing support skeleton and stainless steel spiral coil water channel in electric machine casing, ensure that the alloy electric machine casing rigidity of built-in stainless steel spiral channel is high, Stability Analysis of Structures is reliable, it is unlikely to deform and ftractures, high-volume can be closed by enabling aluminum alloy to lost foam casting process, aluminium alloy electric casing of the reliable and stable production with built-in stainless steel spiral channel, motor casing casting accuracy can be improved high, reduce motor casing casting flaw, reduce production cost.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.Wherein：
Fig. 1 is the aluminium alloy lost foam technical process for casting figure of spiral coil water channel built in the present invention；
Fig. 2 is the structural representation of spiral coil water channel of the present invention and processing support skeleton；
Fig. 3 is the schematic diagram of one of spiral coil channel structure of the present invention；
Fig. 4 is two schematic diagram of spiral coil channel structure of the present invention；
Fig. 5 is three schematic diagram of spiral coil channel structure of the present invention.
Embodiment
To describe the technology contents of the present invention, construction feature, the objects and the effects in detail, below in conjunction with embodiment and accompanying drawing is coordinated to describe in detail.
Refer to shown in Fig. 1, the alloy electric machine housing lost foam casting structure and casting technique of the built-in coil pipe water channel of the present invention comprise the following steps：
Step 01：It is prepared by spiral coil water channel：Flat tube or the rigid spiral coil water channel of pipe coiling one are used according to product structure, the upper and lower ends side of spiral coil water channel is respectively equipped with water inlet and delivery port；
Step 02：It is prepared by the white mould moulds of motor casing EPS：According to product structure and spiral coil channel structure, design processes the white mould moulds of motor casing EPS that can be stably fixed at spiral coil water channel in the white moulds of EPS；
Step 03：Prefoam and tunica albuginea shaping：Eps foam bead prefoam, controls vapour source pressure 0.05--0.08 MPa, 18~23g/L of proportion, volatile content >=3.5%, 24 hours curing times during prefoam；Eps foam bead after foaming is added in tunica albuginea forming machine, prepare that appearance is uniform and smooth, the constitutionally stable motor casing tunica albuginea for including spiral coil water channel using the white mould moulds of motor casing EPS, the water inlet and delivery port for preparing rear screw coil pipe water channel stretch out from the cylinder of motor casing tunica albuginea；Then tunica albuginea is placed in into humidity below 30,42 DEG C of -45 DEG C of drying rooms of temperature again to dry 24 hours；
Step 04：Swabbing：The bottom gating system in connection in the white mould of motor casing of forming, then fireproof coating is hung up in the white mould surface of motor casing, ensure that fireproof coating coating is uniform, white without hanging, paint thickness is controlled in 0.6-0.8mm, the white mould of the motor casing for brushing coating is put into 45 DEG C of -55 DEG C of drying rooms again, humid control below 30, dry 72 hours motor casing casting patterns derived above；Casting system is the aluminium water access way for connecting cast parts, is generally bonded and is constituted by horizontal running channel and longitudinal running channel；
Step 05：Husky moulding is buried in vibrations：The dry motor casing casting pattern finished is positioned in plain jolter, notes husky using rain type, layering addition molding sand, when adding, ram-jolt carries out moulding, ram-jolt time 30s-65s；
Step 06：Cast molding：Cast using the model that it is good to jolt moulding that bottom filling casts mode, 740-810 DEG C of cast temperature, casting time is more than 20s；
Step 07：Blast cleaning：The complete cooled and solidified of aluminium water is specially treated, the aluminium alloy electric casing that has cast is obtained by blast cleaning again after sand removal；
Step 08：Heat treatment：The aluminium alloy electric casing of built-in coil pipe water channel to having cast carries out T6 heat treatments, obtains aluminium alloy electric casing to be processed.
Spiral coil water channel is that metal spiral coil pipe water channel processing of the fusing point higher than cast aluminium alloy gold fusing point is obtained, the metal spiral coil pipe water channel preferentially uses stainless steel spiral coil water channel or copper spiral coil water channel, it would however also be possible to employ fusing point is higher than the fire resistant aluminum alloy spiral coil water channel of cast aluminium alloy gold.
Refer to shown in Fig. 2, spiral coil water channel 1 is connected with the processing support skeleton 2 for being easy to tunica albuginea shaping, the processing support skeleton 2 is also cast in aluminium alloy electric casing 3, one end of the processing support skeleton 2 is exposed from one end of aluminium alloy electric casing 3, and the bared end of the processing support skeleton 2 is connected with the lower end of bottom gating system 4.
Refer to shown in Fig. 3, the surface of spiral coil water channel 1, which is provided with, to be easy to combine aluminium alloy and stainless steel or the pit or pit 11 of copper.
Refer to shown in Fig. 4, the outer surface of spiral coil water channel 1 is provided with lumpy crest line or groove 12.
Refer to shown in Fig. 5, the outer surface of spiral coil water channel 1, which is provided with, to be easy to combine aluminium alloy and stainless steel or the cladding steel wire 4 of copper.
The specification of flat tube in spiral coil water channel is：The x 0.3mm of 25 x 7, the rotation direction and spiral quantity, pitch of spiral coil water channel prepared by flat tube are set according to motor casing size and power of motor.
The specification of pipe in spiral coil water channel is：The x 0.3mm of φ 7, the rotation direction and spiral quantity, pitch of spiral coil water channel prepared by pipe are set according to motor casing size and power of motor.
The present invention also is adapted for casting the parts such as aluminium alloy cylinder, the cylinder of built-in spiral coil water channel in addition to the aluminium alloy electric casing of spiral coil water channel built in suitable casting.
It the foregoing is only embodiments of the invention; it is not intended to limit the scope of the invention; the equivalent structure transformation that every utilization description of the invention and accompanying drawing content are made, or other related technical fields are directly or indirectly used in, it is included within the scope of the present invention.
Claims (8)
1. a kind of aluminium alloy lost foam casting technique of built-in spiral coil water channel, it is characterised in that：Comprise the following steps：
Step 01：It is prepared by spiral coil water channel：Flat tube or the rigid spiral coil water channel of pipe coiling one are used according to product structure, the upper and lower ends side of spiral coil water channel is respectively equipped with water inlet and delivery port；
Step 02：It is prepared by the white mould moulds of motor casing EPS：According to product structure and spiral coil channel structure, design processes the white mould moulds of motor casing EPS that can be stably fixed at spiral coil water channel in the white moulds of EPS；
Step 03：Prefoam and tunica albuginea shaping：Eps foam bead prefoam, eps foam bead after foaming is added in tunica albuginea forming machine, prepare that appearance is uniform and smooth, the constitutionally stable motor casing tunica albuginea for including spiral coil water channel using the white mould moulds of motor casing EPS, the water inlet and delivery port for preparing rear screw coil pipe water channel stretch out from the cylinder of motor casing tunica albuginea, then again dry motor casing tunica albuginea；
Step 04：Swabbing：The bottom gating system in connection in the white mould of motor casing of forming, then fireproof coating is hung up in the white mould surface of motor casing, ensure that fireproof coating coating is uniform, white without hanging, then the white mould of the motor casing for brushing coating be put into drying in drying room to obtain motor casing casting pattern；
Step 05：Husky moulding is buried in vibrations：The dry motor casing casting pattern finished is positioned in plain jolter, notes husky using rain type, layering addition molding sand, when adding, ram-jolt carries out moulding, ram-jolt time 30s-65s；
Step 06：Cast molding：Cast using the model that it is good to jolt moulding that bottom filling casts mode, 740-810 DEG C of cast temperature, casting time is more than 20s, the water inlet and delivery port for pouring into a mould rear screw coil pipe water channel stretch out from the cylinder of motor casing；
Step 07：Blast cleaning：The complete cooled and solidified of aluminium water is specially treated, the aluminium alloy electric casing that has cast is obtained by blast cleaning again after sand removal；
Step 08：Heat treatment：The aluminium alloy electric casing of built-in coil pipe water channel to having cast carries out T6 heat treatments, obtains aluminium alloy electric casing to be processed.
2. a kind of aluminium alloy lost foam casting technique of built-in spiral coil water channel according to claim 1, it is characterised in that：Spiral coil water channel in the step 01 is higher than the metal spiral coil pipe water channel of cast aluminium alloy gold fusing point for fusing point, the metal spiral coil pipe water channel is stainless steel spiral coil water channel or copper spiral coil water channel, or fusing point is higher than the fire resistant aluminum alloy spiral coil water channel of cast aluminium alloy gold.
3. a kind of aluminium alloy lost foam casting technique of built-in spiral coil water channel according to claim 1, it is characterised in that：Spiral coil water channel in the step 01 is connected with the processing support skeleton for being easy to tunica albuginea shaping, the processing support skeleton is also cast in aluminium alloy electric casing, one end of the processing support skeleton is exposed from one end of aluminium alloy electric casing, and the bared end of the processing support skeleton is connected with the lower end of bottom gating system.
4. a kind of aluminium alloy lost foam casting technique of built-in spiral coil water channel according to claim 1, it is characterised in that：The surface of spiral coil water channel in the step 01, which is provided with, to be easy to combine aluminium alloy and stainless steel or the pit or pit of copper.
5. a kind of aluminium alloy lost foam casting technique of built-in spiral coil water channel according to claim 1, it is characterised in that：The outer surface of spiral coil water channel in the step 01 is provided with lumpy crest line or groove.
6. a kind of aluminium alloy lost foam casting technique of built-in spiral coil water channel according to claim 1, it is characterised in that：The outer surface of spiral coil water channel in the step 01, which is provided with, to be easy to combine aluminium alloy and stainless steel or the cladding steel wire of copper.
7. a kind of aluminium alloy lost foam casting technique of built-in spiral coil water channel according to claim 1, it is characterised in that：The specification of the flat tube in spiral coil water channel in the step 01 is：25 x 7 x 0.3mm.
8. a kind of aluminium alloy lost foam casting technique of built-in spiral coil water channel according to claim 1, it is characterised in that：The specification of the pipe in spiral coil water channel in the step 01 is：φ7 x 0.3mm.
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Cited By (10)
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| CN108099144A (en) * | 2017-11-29 | 2018-06-01 | 南通超达装备股份有限公司 | A kind of motor casing mold with water cooling |
| CN108927493A (en) * | 2018-07-12 | 2018-12-04 | 北京三未科技发展有限公司 | A kind of aluminium alloy electric automobile inner-cooled machine shell cast shaping process |
| CN109351917A (en) * | 2018-11-29 | 2019-02-19 | 芜湖新兴新材料产业园有限公司 | The casting technique of motor housing |
| CN111112580A (en) * | 2020-01-13 | 2020-05-08 | 芜湖泓鹄材料技术有限公司 | Forming method of heat dissipation channel of automobile stamping die casting |
| CN112815588A (en) * | 2020-12-30 | 2021-05-18 | 株洲天桥奥悦冰雪科技有限公司 | Artificial snow making device |
| CN112833599A (en) * | 2020-12-30 | 2021-05-25 | 株洲天桥奥悦冰雪科技有限公司 | Movable high-temperature snow making machine |
| CN114178505A (en) * | 2021-12-13 | 2022-03-15 | 东营诚扬精密机械有限公司 | Accurate forming method for internal pipeline of light alloy casing |
| CN114247871A (en) * | 2021-11-15 | 2022-03-29 | 苏州美迈快速制造技术有限公司 | Manufacturing method for embedding stainless steel water channel into aluminum alloy casting structural part |
| CN116984561A (en) * | 2023-07-24 | 2023-11-03 | 西安鑫龙机械铸造有限公司 | Efficient preparation method of special pipe based on lost foam process |
| CN117066451A (en) * | 2023-08-18 | 2023-11-17 | 山东众宝电器有限公司 | Heating plate and production device and production process thereof |
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| CN108099144A (en) * | 2017-11-29 | 2018-06-01 | 南通超达装备股份有限公司 | A kind of motor casing mold with water cooling |
| CN108099144B (en) * | 2017-11-29 | 2023-12-29 | 南通超达装备股份有限公司 | Motor casing mould with water cooling function |
| CN108927493A (en) * | 2018-07-12 | 2018-12-04 | 北京三未科技发展有限公司 | A kind of aluminium alloy electric automobile inner-cooled machine shell cast shaping process |
| CN108927493B (en) * | 2018-07-12 | 2023-08-29 | 北京三未科技发展有限公司 | Casting molding process of inner cooling motor casing for aluminum alloy electric automobile |
| CN109351917A (en) * | 2018-11-29 | 2019-02-19 | 芜湖新兴新材料产业园有限公司 | The casting technique of motor housing |
| CN111112580A (en) * | 2020-01-13 | 2020-05-08 | 芜湖泓鹄材料技术有限公司 | Forming method of heat dissipation channel of automobile stamping die casting |
| CN112815588A (en) * | 2020-12-30 | 2021-05-18 | 株洲天桥奥悦冰雪科技有限公司 | Artificial snow making device |
| CN112833599A (en) * | 2020-12-30 | 2021-05-25 | 株洲天桥奥悦冰雪科技有限公司 | Movable high-temperature snow making machine |
| CN114247871A (en) * | 2021-11-15 | 2022-03-29 | 苏州美迈快速制造技术有限公司 | Manufacturing method for embedding stainless steel water channel into aluminum alloy casting structural part |
| CN114178505A (en) * | 2021-12-13 | 2022-03-15 | 东营诚扬精密机械有限公司 | Accurate forming method for internal pipeline of light alloy casing |
| CN116984561A (en) * | 2023-07-24 | 2023-11-03 | 西安鑫龙机械铸造有限公司 | Efficient preparation method of special pipe based on lost foam process |
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