CN104209472A - Method for casting water cooling motor shell - Google Patents
Method for casting water cooling motor shell Download PDFInfo
- Publication number
- CN104209472A CN104209472A CN201410438179.9A CN201410438179A CN104209472A CN 104209472 A CN104209472 A CN 104209472A CN 201410438179 A CN201410438179 A CN 201410438179A CN 104209472 A CN104209472 A CN 104209472A
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Abstract
The invention relates to a method for casting a water cooling motor shell. Cast aluminum alloy is adopted by a motor shell body, and the water cooling motor shell comprises the machine shell body and a base, a strip-shaped spirally-arranged water channel formed integrally with the motor shell body is arranged on the motor shell body, and the strip-shaped spirally-arranged water channel and the motor shell body are integrally cast and formed. According to the method, the special casting and sand shakeout process is adopted, sand cores in the water channel are completely discharged, residual sand does not exist in the water channel, and the heat dissipation efficiency of the motor shell body is improved. The method is simple in process and low in cost, the motor shell body which is cast and formed through the method is provided, a water inlet and a water outlet are formed in the tail end of the spiral water channel, and the sectional area of the water channel is larger than the sectional area of the water inlet. According to the water channel of the motor shell body, a traditional spiral water channel is improved and designed, the number of corners of the water channel is increased, the corner size is reasonably designed, and therefore the water channel is made to more conform to the production needs.
Description
Technical field
The present invention relates to field of motor manufacturing, especially the manufacture method of water-cooling motor cabinet and structure.
Background technology
Along with the promotion and application of new-energy automobile, electric automobile and oil-electric vehicle have obtained sufficient development and utilization, and the two something in common is inevitably to use drive motor, to maintain vehicle driving dynamics.Drive motor generally need have higher-wattage, is especially applied to relatively large commercial car, as bus, passenger vehicle etc.But motor is in the running due to heating effect of current and mechanical power loss etc., makes the caloric value of motor large, limit the lifting of electric efficiency.Because degree of protection requires higher, the heat that motor internal produces is difficult to directly derive, and the general casing water-cooling pattern that adopts carries out heat exchange.Aluminium alloy due to density low, thermal conductivity factor height is often selected as case material.Existing aluminium alloy casing mostly is aluminium section bar and forms water channel by welding, and this kind of technique can only form the water route arranged along motor shaft to S type, and welding cost is high, and welding quality is wayward.S type water route due to elbow water resistance large, cause pump power and lift demand high, whole waterway circulating pipeline also can be made to bear more pressure, and safety coefficient is low.The casting of aluminium alloy matter casing spiral channel is the problem seeking in the industry to solve always, and due to spiral channel complex structure, the core in water channel can not be removed clean by common knockout technique, and blocking water channel affects radiating effect.
Summary of the invention
The invention provides a kind of casting method of water cooling motor housing, provide a kind of and manufacture simple, that product defects is less, technique is easy to realization casting method.Described water cooling motor housing has spirality channel, and described water channel and the one-body molded casting of described motor casing form; It is characterized in that, described casting method comprises the following steps:
(1) spirality channel core is made;
(2) core is fully dry;
(3) by casing inner mold and outer mold the pre-heat treatment;
(4) water channel sand cores is placed in casing inner mold and outer mold, mutually locates with casing outer mold;
(5) molten metal pouring is entered between inner mold and outer mold;
(6) after natural cooling forming, inner mold and outer mold are separated;
(7) casing is heat-treated, make water channel sand cores automatic crushing;
(8) to hydrodynamic cleaning sand removal in casing water channel.
In above-mentioned steps (1), the two or more precoated sand of employing of described core mixes with phenolic resins.When the making of described core adopts three kinds of precoated sands to mix with phenolic resins, the ratio of described three kinds of precoated sands is respectively 50% ~ 70%, 10% ~ 20%, 10% ~ 40%.Described phenolic resins and precoated sand mixture ratio are for being not more than 10%.
Preferably, described casing adopts the casting of ZL104 type aluminium alloy.
In step (7), described heat treatment temperature is 540 DEG C, and the time is 4 hours.
In addition, a kind of water-cooled machine utilizing said method to cast also is provided, there is casing and base, described casing is furnished with the water channel that integrated ribbon spiral is arranged with casing, water channel end is provided with water inlet and delivery port, and described water channel sectional area is greater than water inlet sectional area.Described casing is furnished with line outlet, and described water channel is arranged along described line outlet shape circumscribes.Whole water channel each several part sectional area is identical.
Spiral channel of the present invention and casing one-body molded while casting, without the need to welding, directly finishing step is entered after casting, compare existing spiral water route welding manufacture technique, eliminate welding sequence, save welding material and welding is artificial, avoid seepy question because welding produces and Welding Structure support due to weld seam reason and cause the problem of appearance poor.Integrated structure also makes spiral water route completely and chassis contact, and reach the Maximum Contact area of the two, heat transference efficiency is high.
Accompanying drawing explanation
Fig. 1 is water-cooling motor cabinet structural representation of the present invention;
Fig. 2 is the core channel structure schematic diagram utilized involved by casing casting method provided by the present invention;
Fig. 3 is core water channel front view.
1 is casing, and 2 is inlet openings, and 3 is apopores, and 4 is terminal boxes, and 5 is water inlets, and 6 is delivery ports, and 7 is core water channels, and 8 is pilot pins.
Detailed description of the invention
The invention provides a kind of casting method with the motor casing of spirality channel, utilize sand mold to form channel structure, adopt gravity casting to realize, make molten metal such as aluminium alloy solution inject casting mold under gravity.Concrete grammar is as follows:
Make core: according to casing channel structure manufacture core as shown in Figure 2, two or more precoated sand is suitably mixed with appropriate phenolic resins, by core shooter, blow in core mold with compressed air by sand grains and phenolic resin blend, now core mold preheat temperature is 250 DEG C.Heat-insulation pressure keeping 20 minutes under pressure, can obtain the core having some strength and meet physical dimension requirement after die sinking.This core requires to have certain intensity after the drying, can bear the impact of molten metal during casting, and can be convenient to cleaning by automatic crushing when casing heat treatment.Because core is shaping for casing internal water channel, between the inner mold that needs are positioned casting casing and outer mold, on its body, form pilot pin 8 when making core water channel 7 simultaneously, the outer mold inwall corresponding with pilot pin 8 position of core is provided with groove, during location, pilot pin is inserted groove, be convenient to core location.After core manufactures, should be fully dry, affect castability to avoid getting angry in a large number during casting.
Location: after casing inner mold and the abundant preheating of outer mold difference, core is placed between inner mold and outer mold, utilizes pilot pin 8 accurately to locate.
Casting: be poured between inner mold and outer mold above inner mold and outer mold by the molten metal dissolved, if gas forming amount is large after casting, should carry out feeding at rising head.
Parting: the casing of casting adopts automatic mould separating mechanism that mould is opened taking-up after cooling forming.
Heat treatment and knockout: consider that casing need bear various load, and the requirement of crudy and working (machining) efficiency, need heat-treat casing, when heat treatment core at high temperature automatic crushing discharge from watercourse port and reserved fabrication hole.So core needs when making the heat treatment temperature considering parts, to make core can automatic crushing under this heat treatment temperature.
Sand removal: also should do airtight test after machined, the product after test passes need be washed by water more than 5 minutes the complete emptying of sand ensured in housing water channel.
Above-mentioned steps is the general step of casting method of the present invention, as a kind of embodiment of the present invention, for aluminium alloy, explains above-mentioned steps in detail.The features such as it is little that aluminum alloy casing has quality, and intensity is high, and cost is low, the present embodiment selects ZL104 type aluminium alloy, casts for casing.First, utilize three kinds of precoated sands and phenolic resins to be suitably mixed to form core, automatic crushing during owing to requiring this core casing heat treatment, suitably controls precoated sand and phenolic resin blend component ratio.In the present embodiment, casing heat treatment temperature is 400 ~ 600 DEG C, therefore selects suitable ratio when precoated sand and mixed with resin, is below the pulverizing temperature of different proportion three kinds of made cores of precoated sand mixing:
| 1# precoated sand | 2# precoated sand | 3# precoated sand | Phenolic resins ratio | Pulverize temperature |
| 50％ | 30％ | 20％ | 10％ | 500～650℃ |
| 50％ | 20％ | 30％ | 5％ | 400～500℃ |
| 40％ | 60％ | 0 | 5％ | 450～550℃ |
After core is made, should drying be carried out, blow with fan under room temperature can being adopted time dry, when its humidity low 20% time, can think fully drying.
Owing to adopting gravity casting, molten aluminium alloy need through after a while from die top to mold bottom, for ensureing that molten aluminium alloy flows into mold bottom smoothly and do not occur solidification phenomenon in casting cycle, mould need be carried out the pre-heat treatment, according to the feature of ZL104 type aluminium alloy, mould and die preheating condition should at 200 ~ 300 DEG C.After preheating, core to be placed between interior outer mold and to locate, forming casting model.
The molten aluminium alloy dissolved is poured between inner mold and outer mold above inner mold and outer mold.Because core forms water channel shape, the casing through molten aluminium alloy casting will form the integral structure with hollow water channel.Adopt gravity casting mode to cast and easily form defect at rising head place, feeding.
The aluminium alloy casing of cooling forming need through Overheating Treatment, and adopt T6 Technology for Heating Processing, heat treatment temperature is 500 ~ 650 DEG C, preferably 540 DEG C ± 10 DEG C, in 4 hours processing times, now in casing, core can be automatically cracked, discharges from watercourse port and reserved fabrication hole.
Product after casing carries out machined after test passes need wash by water more than 5 minutes to ensure the complete emptying of sand in housing water channel.
Apply the water-cooled machine that above method is cast, as Fig. 1, there is casing and base, wherein casing is provided with the integrated spirality channel with casing.Because the concept of helical heat spreader water channel is suggested already, but be limited to manufacturing process, helical heat spreader water channel rests on casing welding all the time and is formed, or uses copper pipe to form the stage of water channel.The spiral channel shaping with casing integrally casting does not also drop into the precedent of practical application at present.Water-cooled machine provided by the present invention uses the casing 1 shaping with spiral channel integrally casting, and make spiral water route completely and chassis contact, reach the Maximum Contact area of the two, heat transference efficiency is higher.Casing spiral channel design time should take into account the resistance that heat exchange area considers current again, when water channel design, make water channel global sections amass identical as far as possible, with keep the smooth and easy of current and resistance to water-flow minimum.Fig. 2 and Fig. 3 casts casing water channel of the present invention core schematic diagram used.The feature of water-cooled machine casing water channel of the present invention can be found out by this core.At the normal width of water channel, or mean breadth is labeled as d, and it is designed to the width slightly larger than water inlet 5, reduces further to make water resistance in water channel; But the two cross section product moment is unsuitable excessive, otherwise can form bubble even space interlayer in water channel, reduce heat transfer efficiency.
Casing 1 outer setting has inlet opening 2 and apopore 3, is arranged at described casing bottom, communicates respectively with water channel water inlet 5 and delivery port 6.Inlet opening 2 and apopore 3 are conducive to water pump to arrange, and inlet opening 2 and apopore 3 are arranged along casing radial direction, are convenient to drainpipe and install.In the scope that technique allows, it is better that inlet opening 2 and apopore 3 should be designed to more to press close to casing ontology.
As a kind of implementation of water-cooled machine of the present invention, motor case is designed with line outlet, i.e. terminal box 4, draw for motor winding conducting wire, the disappearance of line outlet place structure, generally, can cause the difficult arrangement of radiation water channel on casing.The radiation water channel provided in the present invention, arranges, namely when terminal box 4 is square along terminal box 4 shape circumscribes, water channel along square terminal box roundabout around, keep the sectional area of water channel constant around the corner, both can ensure casing Homogeneouslly-radiating, avoid whirlpool, can ensure that again water resistance is less.According to the display of Fig. 2, water channel mean breadth is d, and meeting square terminal box roundabout corner mean breadth is d ', and ideally, d should be identical with d ' numerical value or close, to keep cooling water flow velocity consistent.Further, adopt aluminum or aluminum alloy casing, there is good heat dispersion, and motor weight can be alleviated further, improve electric efficiency.For the casing of employing spiral channel disclosed in this invention, the mode of gravity casting should be adopted to cast and to form.
Claims (9)
1. a casting method for water cooling motor housing, described water cooling motor housing has spirality channel, and described water channel and the one-body molded casting of described motor casing form; It is characterized in that, described casting method comprises the following steps:
(1) spirality channel core is made;
(2) core is fully dry;
(3) by casing inner mold and outer mold the pre-heat treatment;
(4) water channel sand cores is placed in casing inner mold and outer mold, mutually locates with casing outer mold;
(5) molten metal pouring is entered between inner mold and outer mold;
(6) after natural cooling forming, inner mold and outer mold are separated;
(7) casing is heat-treated, make water channel sand cores automatic crushing;
(8) to hydrodynamic cleaning sand removal in casing water channel.
2. the casting method of water cooling motor housing according to claim 1, is characterized in that, the two or more precoated sand of employing of described core mixes with phenolic resins.
3. the casting method of water cooling motor housing according to claim 2, is characterized in that, the making of described core adopts three kinds of precoated sands to mix with phenolic resins, and the ratio of described three kinds of precoated sands is respectively 50% ~ 70%, 10% ~ 20%, 10% ~ 40%.
4. the casting method of water cooling motor housing according to claim 3, is characterized in that, described phenolic resins and precoated sand mixture ratio are not more than 10%.
5. the casting method of water cooling motor housing according to claim 4, is characterized in that, described casing adopts the casting of ZL104 type aluminium alloy.
6. the casting method of water cooling motor housing according to claim 4, is characterized in that, described heat treatment temperature is 540 DEG C, and the time is 4 hours.
7. a water-cooled machine, the casting of the method as described in claim 1 ~ 6 any one is used to form, it is characterized in that, there is casing and base, described casing is furnished with the water channel that integrated ribbon spiral is arranged with casing, water channel end is provided with water inlet and delivery port, and described water channel sectional area is greater than water inlet sectional area.
8. water-cooled machine according to claim 1, is characterized in that, described casing is furnished with line outlet, and described water channel is arranged along described line outlet shape circumscribes.
9. water-cooled machine according to claim 1, is characterized in that, whole water channel each several part sectional area is identical.
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| CN201410438179.9A CN104209472A (en) | 2014-08-29 | 2014-08-29 | Method for casting water cooling motor shell |
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| CN201410438179.9A CN104209472A (en) | 2014-08-29 | 2014-08-29 | Method for casting water cooling motor shell |
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| CN201410438179.9A Withdrawn CN104209472A (en) | 2014-08-29 | 2014-08-29 | Method for casting water cooling motor shell |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105170916A (en) * | 2015-09-08 | 2015-12-23 | 浙江双菱新能源科技有限公司 | Permanent magnet synchronous motor shell casting mold |
| CN105563035A (en) * | 2016-01-06 | 2016-05-11 | 常州市蓝托金属制品有限公司 | Machining technology of machine shell cooling water way |
| CN105798262A (en) * | 2016-03-26 | 2016-07-27 | 山东鸿源新材料有限公司 | Production process for integrated type water-cooled motor shell of new energy automobile |
| CN106077507A (en) * | 2016-08-31 | 2016-11-09 | 山东泰开精密铸造有限公司 | The casting die of a kind of automobile water-cooling motor casing foundry goods and casting technique |
| CN106329858A (en) * | 2016-09-27 | 2017-01-11 | 惠州市威盛工业有限公司 | New energy vehicle water-cooling motor shell manufacturing process and its structure |
| CN106392014A (en) * | 2016-09-27 | 2017-02-15 | 惠州市威盛工业有限公司 | Manufacturing process and structure for sand core mold of spiral water channel of new energy water-cooled motor enclosure |
| CN107528411A (en) * | 2017-09-01 | 2017-12-29 | 智车优行科技（上海）有限公司 | Water-cooling motor cabinet, core and the method for manufacturing water-cooling motor cabinet |
| CN107866530A (en) * | 2017-10-19 | 2018-04-03 | 常州理工科技股份有限公司 | A kind of method for manufacturing water cooled machine support |
| CN108213352A (en) * | 2016-12-14 | 2018-06-29 | 浙江强广剑精密铸造股份有限公司 | A kind of water-cooled motor shell casting method |
| CN109226692A (en) * | 2018-11-16 | 2019-01-18 | 衡阳博思科技有限公司 | A kind of environment-friendly type aluminium hot melt shaping equipment |
| CN112134391A (en) * | 2019-06-24 | 2020-12-25 | 东莞群力电机有限公司 | Bottom cover integrated motor casing casting and production process thereof |
| CN113828730A (en) * | 2020-06-08 | 2021-12-24 | 东元电机股份有限公司 | Closed water-cooling frame manufacturing method and closed water-cooling frame thereof |
| US11462977B2 (en) * | 2020-06-05 | 2022-10-04 | Teco Electric & Machinery Co., Ltd. | Closed-type liquid cooling motor frame and method for manufacturing the same |
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| CN105170916A (en) * | 2015-09-08 | 2015-12-23 | 浙江双菱新能源科技有限公司 | Permanent magnet synchronous motor shell casting mold |
| CN105563035A (en) * | 2016-01-06 | 2016-05-11 | 常州市蓝托金属制品有限公司 | Machining technology of machine shell cooling water way |
| CN105798262B (en) * | 2016-03-26 | 2017-11-03 | 山东鸿源新材料有限公司 | The production technology of new-energy automobile integral type water-cooling motor cabinet |
| CN105798262A (en) * | 2016-03-26 | 2016-07-27 | 山东鸿源新材料有限公司 | Production process for integrated type water-cooled motor shell of new energy automobile |
| CN106077507A (en) * | 2016-08-31 | 2016-11-09 | 山东泰开精密铸造有限公司 | The casting die of a kind of automobile water-cooling motor casing foundry goods and casting technique |
| CN106392014B (en) * | 2016-09-27 | 2020-06-09 | 惠州市威盛工业有限公司 | Manufacturing process and structure of spiral water channel sand core mold of water-cooled motor shell of new energy automobile |
| CN106392014A (en) * | 2016-09-27 | 2017-02-15 | 惠州市威盛工业有限公司 | Manufacturing process and structure for sand core mold of spiral water channel of new energy water-cooled motor enclosure |
| CN106329858B (en) * | 2016-09-27 | 2019-10-22 | 惠州市威盛工业有限公司 | A kind of new-energy automobile water cooling motor housing manufacturing process and its structure |
| CN106329858A (en) * | 2016-09-27 | 2017-01-11 | 惠州市威盛工业有限公司 | New energy vehicle water-cooling motor shell manufacturing process and its structure |
| CN108213352A (en) * | 2016-12-14 | 2018-06-29 | 浙江强广剑精密铸造股份有限公司 | A kind of water-cooled motor shell casting method |
| CN107528411A (en) * | 2017-09-01 | 2017-12-29 | 智车优行科技（上海）有限公司 | Water-cooling motor cabinet, core and the method for manufacturing water-cooling motor cabinet |
| CN107866530A (en) * | 2017-10-19 | 2018-04-03 | 常州理工科技股份有限公司 | A kind of method for manufacturing water cooled machine support |
| CN109226692A (en) * | 2018-11-16 | 2019-01-18 | 衡阳博思科技有限公司 | A kind of environment-friendly type aluminium hot melt shaping equipment |
| CN112134391A (en) * | 2019-06-24 | 2020-12-25 | 东莞群力电机有限公司 | Bottom cover integrated motor casing casting and production process thereof |
| US11462977B2 (en) * | 2020-06-05 | 2022-10-04 | Teco Electric & Machinery Co., Ltd. | Closed-type liquid cooling motor frame and method for manufacturing the same |
| CN113828730A (en) * | 2020-06-08 | 2021-12-24 | 东元电机股份有限公司 | Closed water-cooling frame manufacturing method and closed water-cooling frame thereof |
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Application publication date: 20141217 |