CN202762955U - Casting mould adopting metal type sand to cast automobile differential casing - Google Patents
Casting mould adopting metal type sand to cast automobile differential casing Download PDFInfo
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- CN202762955U CN202762955U CN 201220412652 CN201220412652U CN202762955U CN 202762955 U CN202762955 U CN 202762955U CN 201220412652 CN201220412652 CN 201220412652 CN 201220412652 U CN201220412652 U CN 201220412652U CN 202762955 U CN202762955 U CN 202762955U
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- sand
- automobile differential
- covering
- casting
- differential casing
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Abstract
The utility model relates to a casting mould adopting metal type sand to cast an automobile differential casing. The mould comprises an upper metal type, a lower metal type, an upper shaping plate and a lower shaping plate and is characterized in that a protruded tap metal core is arranged on the upper metal type and is integrally connected with the upper metal type. The shape of the tap metal core is matched with that of a hollow inner cavity of the automobile differential casing. An exhaust device is arranged on the upper shaping plate and is arranged at the bottom of an upper shaping plate cast model cavity that the tap metal core corresponds to, and small hole mud cores used for forming four small holes on the annular wall of the automobile differential casing are further arranged in the lower metal type cavity and are of metal sand structure. An automobile differential casing made of the mould is good in surface quality, high in size accuracy, high in process product yield and low in production cost. Product quality can be easily controlled.
Description
Technical field
The utility model relates to a kind of casting mould that adopts metal type sand-covering casting of automobile differential casing.
Background technology
The automobile differential housing is one of important foundry goods in the automotive axle system.Automobile differential housing foundry goods is the foundry goods of hollow, flanged dish, needs to place in casting mold the inner chamber that the mud core forms foundry goods when Foundry Production.The traditional processing technology of differential carrier foundry goods is to adopt the tide mould sand machine molding in the vehicle.The main problem that exists is for the tide mould sand machine molding is produced the differential carrier foundry goods: the dimensional accuracy of foundry goods is low, and surface quality of continuous castings is poor, and casting quality stability is low, and waste product is high.The tide mould sand sand using amount is large, and sand preparing system is huge, complicated, and energy consumption is high.Differential casing foundry goods became uneven, for satisfying the casting solidification needs, the place need to settle chill, complex manufacturing at the foundry goods heavy wall.Die cavity intensity and the hardness of tide mould sand moulding are relatively low, after the molten iron cast, iron liquid is in process of setting, magnesium iron can produce larger graphitization expansion, can make like this die cavity become large, therefore foundry goods need adopt riser feeding, could obtain like this castings of dense structure, so the molten iron recovery rate is lower.
Metal type sand-covering casting is a kind of new casting technique, has the characteristics such as energy-conservation, material-saving, high-quality, is mainly used at present structure, the simple castings production of shape matching, such as: bent axle, flywheel, abrading-ball.Not yet be applied at present automobile differential housing castings production.Chief reason is exactly: the shape matching of automobile differential housing is complicated, particularly during castings production, must adopt the mode of lower mud core, forms the inner chamber of foundry goods.For Sand-Faced Metal Mould Casting, because swage does not have gas permeability, a large amount of gases that entity mud core can produce when cast behind the lower mud core produce the fiery phenomenon of choking easily, and produce a large amount of gas hole defects in foundry goods.Therefore, the gas forming amount of the form of mud core and mud core becomes the key that metal type sand-covering casting of automobile differential casing is produced in metal type sand-covering casting of automobile differential casing castings production.The differential casing became uneven, there is the wall thickness at four aperture places much thick with respect to other position thickness of foundry goods in the housing, when metal type sand-covering is cast this foundry goods, adopts and solidify simultaneously head-free casting, careless slightly, be easy to produce herein shrinkage porosite, shrinkage cavity defect.The material of automobile differential housing foundry goods is QT500 in addition, belongs to ferritic spheroidal graphite cast iron.And the metal type sand-covering casting cooling speed is fast, is applicable to the production of pearlitic ductile iron.
The utility model content
Technical problem to be solved in the utility model is to overcome deficiency of the prior art and a kind of casting mould that adopts metal type sand-covering casting of automobile differential casing is provided, and the automobile differential surface of shell quality that makes is good, dimensional accuracy is high, product yield is high, production cost is low, product quality is controlled easily.
The technical scheme in the invention for solving the above technical problem is: the casting mould of this employing metal type sand-covering casting of automobile differential casing, comprise metal mold, bottom die, cope match plate and lower template, upper metal mold is provided with sand-spraying hole, air discharge duct and set pin sleeve, bottom die is provided with lower sand-spraying hole and alignment pin, cope match plate comprises cast model, the running gate system template, water-cooling subbase, air tube, the exhaust boss, alignment pin, heating tube and temperature sensor, lower template comprises cast model, the running gate system template, water-cooling subbase, the exhaust boss, set pin sleeve, heating tube and temperature sensor, upper metal mold and cope match plate matched moulds, cover sand gap on forming between the two, bottom die and lower template matched moulds, cover sand gap under forming between the two, upper sand-spraying hole is corresponding one by one with lower sand-spraying hole position, upper sand-spraying hole with on cover the sand gap and be communicated with, lower sand-spraying hole with under cover the sand gap and be communicated with, it is characterized in that: described upper metal mold is provided with the metal-cored from the beginning of protrusion, metal-cored and upper metal mold is connected as a single entity from the beginning, this is the hollow cavity form fit of metal-cored shape and automobile differential housing from the beginning, be provided with exhaust apparatus on the described cope match plate, this exhaust apparatus is arranged on the from the beginning cope match plate cast model cavity bottom of metal-cored correspondence, also be provided with the aperture mud core that is used to form four apertures on the automobile differential housing ring wall in the bottom die, aperture mud core is the metal covering sand moulds structure.
Exhaust apparatus described in the utility model comprises exhaust piston, spring, movable plate and return guide rod, return guide rod one end is arranged in the corresponding return guide rod hole of cope match plate, return guide rod therewith hole moves cooperation, the other end is fixedly installed on the movable plate, exhaust piston is installed on the movable plate, the position of exhaust piston is corresponding with the position of cope match plate upper air-vent, and the diameter of exhaust piston is provided with spring than the little 0.3-0.4 millimeter of diameter of steam vent between movable plate and the water-cooling subbase.
The wall thickness of upper metal mold described in the utility model and bottom die is 20 ~ 30mm, cover up and down the sand gap of covering that is positioned at running gate system template position in the sand gap and be preferably 12mm, the sand gap of covering that is positioned at the cast model position is preferably 10mm, be positioned at from the beginning that the sand gap of covering of metal-cored head is preferably 3-5mm, to cover sand layer thickness identical for cover sand layer thickness and the bottom die on every side of aperture mud core.
Be provided with 4 set pin sleeves on the upper metal mold described in the utility model, be provided with 4 alignment pins on the bottom die, set pin sleeve and alignment pin all are cross distribution, and both positions are corresponding one by one, and the cross section of alignment pin is circular, and set pin sleeve is slotted hole.
Be respectively arranged with 6 heating tubes in cope match plate described in the utility model and the lower template, in the template of template, also be provided with temperature sensor about heating tube is evenly distributed on.
Air tube on the cope match plate described in the utility model is corresponding one by one with sand-spraying hole quantity and position on the upper metal mold.
Be respectively arranged with a plurality of exhaust boss on the template of cope match plate described in the utility model and lower template.
Be respectively arranged with air discharge duct on the die joint of upper metal mold described in the utility model and lower template.
The utility model compared with prior art has the following advantages: the model die joint that the utility model design is suitable, satisfy the Foundry Production requirement, and the exhaust when guaranteeing cast is unimpeded.Main inner chamber for the differential casing foundry goods adopts the from the beginning mode of mud core of Iron Mould Coated Sand, reduce the overall gas forming amount of mud core, save simultaneously core setting, design suitable mud core exhaust mode, satisfy the exhaust of mud core in automobile differential housing casting pouring, solidification process casting mold die cavity, the particularly casting mold, obtain the sound casting of pore-free defective.Research, design alternative are appropriate covers sand layer thickness and metal mold thickness satisfies automobile differential housing casting solidification cooling condition, solidifies when guaranteeing foundry goods, reaches the purpose from feeding in the casting solidification process, obtains the foundry goods without the shrinkage cavity and porosity tissue.
The automobile differential housing casting dimension accuracy that adopts mould described in the utility model to make is high, surface quality is good, and the follow-up cleaning of foundry goods and polishing workload are little.Adopt the mode of the from the beginning mud core of metal type sand-covering, guaranteed that the metallographic structure of foundry goods inside and outside is even, reduced the precoated sand consumption, saved production cost, greatly reduced the gas forming amount of mud core, reduce the bleb defective; Save the core setting of main mud core with artificial, simplified production link.
Description of drawings
Fig. 1 is automobile differential housing foundry goods schematic diagram described in the utility model.
Fig. 2 is metal mold and cope match plate structural representation on the utility model.
Fig. 3 is the utility model bottom die and lower shaping plate structure schematic diagram.
Fig. 4 is set pin sleeve and locating hole structural representation in the bottom die on the utility model.
Fig. 5 is the utility model exhauster structure schematic diagram.
The specific embodiment
Referring to Fig. 1, automobile differential housing foundry goods described in the utility model belongs to the foundry goods of hollow, flanged dish a, wall thickness became uneven, and the foundry goods relative altitude is higher, and the hollow cavity shape matching complicated, run through whole foundry goods.Also have four aperture b at automobile differential housing ring wall.
When adopting metal type sand-covering to cast this foundry goods, if inner chamber adopts the mode of entity mud core commonly used, then bring the problem of several respects, one: entity mud core will produce a large amount of gas when cast, the die cavity venting quality of metal type sand-covering casting is relatively poor, produces easily the fire of choking, and affects the casting process of foundry goods, bring unsafe factor, and finally cause gas hole defect; Its two: whole inner chamber adopts entity mud core, causes the foundry goods external form cooling condition different from inner chamber, makes easily the inhomogeneities of foundry goods metallographic structure, affects the mechanical performance of foundry goods; Its three: owing to need lower core, needing increases artificial and operation, also can produce drop, mud core during lower core and press and the phenomenon such as collapse, and increases foundry goods and produces the factor that waste product produces.
Referring to Fig. 2, Fig. 3, the utility model comprises metal mold A, bottom die B, cope match plate C, lower template D.Upper metal mold A wall thickness 20-30mm, material is HT250, which is provided with from the beginning metal-cored 1, sand-spraying hole 2, air discharge duct 3, set pin sleeve 4.The wall thickness of upper and lower metal mold of the present utility model satisfies the requirement of metal type sand-covering formative technology, when namely covering sand molding, utilizes the waste heat energy after pouring into a mould to make the temperature of bottom die remain on 180-250 ℃.
Bottom die B wall thickness 20-30mm, material is HT250, which is provided with sand-spraying hole 2 ', alignment pin 5.Cope match plate C comprises cast model 6, running gate system template 7, water-cooling subbase 8, air tube 9, exhaust boss 10, exhaust apparatus 11, alignment pin 5 ', heating tube 12, temperature sensor 13, template 14.Lower template D comprises cast model 6 ', running gate system template 7 ', water-cooling subbase 8 ', exhaust boss 10 ', set pin sleeve 4 ', heating tube 12 ', temperature sensor 13 ', template 14 '.
Upper metal mold A is corresponding one by one with sand-spraying hole 2, the 2 ' position of bottom die B, penetrate the sand plate in order to can share, sand-spraying hole on upper metal mold A and the bottom die B respectively is 10, wherein: be provided with 4 sand-spraying holes on each differential casing cast model, be provided with 2 sand-spraying holes on the running gate system template, the sand-spraying hole diameter is 20mm, guarantees to cover sand and penetrates that precoated sand can intactly fill type in the sand process.Referring to Fig. 4,4 set pin sleeves 4 of upper metal mold A all are cross distribution with 4 alignment pins 5 of bottom die B, and both positions are corresponding one by one, guarantee the precision of mould assembling.Set pin sleeve 4 is slotted hole, and alignment pin 5 is circular, cooperates with slotted hole by circle, and guaranteeing can accurately mould assembling when upper and lower metal mold temperature is inconsistent.
4 set pin sleeves 4 of upper metal mold A also with 4 alignment pins 5 ' of cope match plate C, the position is corresponding one by one, guarantees the precision of matched moulds by set pin sleeve 4 and alignment pin 5 '.Upper metal mold A is provided with the metal-cored 1 from the beginning of protrusion, metal-cored 1 is connected as a single entity with upper metal mold A from the beginning, and this is the hollow cavity form fit of metal-cored 1 shape and automobile differential housing from the beginning.Referring to Fig. 5, cope match plate C cast model cavity bottom upper and that metal 1 core is corresponding from the beginning is provided with exhaust apparatus 11, exhaust apparatus 11 comprises exhaust piston 111, spring 112, movable plate 113 and return guide rod 114, return guide rod 114 1 ends are arranged in the corresponding return guide rod hole of cope match plate C, the return guide rod can move up and down in this hole, the other end is arranged on the movable plate 113, exhaust piston 111 is installed on the movable plate 113, the position of exhaust piston 111 is corresponding with the position of cope match plate C upper air-vent 15, the diameter of exhaust piston 111 is provided with spring 112 than the little 0.3-0.4 millimeter of diameter of steam vent 15 between movable plate 113 and the water-cooling subbase 8.Form certain gap between exhaust piston 111 and the steam vent 15, compressed air goes out die cavity by this interstitial row when penetrating sand, and making from the beginning, the mud core covers layer of sand densification, complete.The operation principle of exhaust apparatus: behind upper metal mold A and the cope match plate C matched moulds, upper metal mold A is depressed into exhaust piston 111 by return guide rod 114 and penetrates the sand operating position, compressed air goes out die cavity by the interstitial row of exhaust piston 111 and steam vent 15 when penetrating sand, and making from the beginning, the mud core covers layer of sand densification, complete.When covering sand and finishing molding, under the effect of spring 112, exhaust piston 111 rises along with the molding of upper metal mold A, whenever once penetrate sand and cover sand, exhaust piston 111 is just finished once and is moved back and forth, gap between exhaust piston 111 and the steam vent 15 just can not lived by the overlay film sand plug, thereby the exhaust of exhaust apparatus is unimpeded when guaranteeing that high injection sand covers sand.
Be evenly distributed with 6 heating tubes 12 in the template 14 of cope match plate C, each heating tube 12 is 2.2kw, and is provided with temperature sensor 13 and carries out FEEDBACK CONTROL, realizes the adjustment of mould.Cope match plate C surface is provided with air tube 9, and the quantity of air tube 9 and position are corresponding one by one with sand-spraying hole 2 quantity and position on the upper metal mold A.When upper metal mold A and cope match plate C matched moulds, air tube 9 highly is lower than upper metal mold A upper surface 10mm.
Be provided with 4 exhaust boss 10 on the die joint among the cope match plate C, each exhaust boss 10 highly is 0.3mm.Be provided with 16 air discharge ducts 3 on the die joint of upper metal mold A.Behind upper metal mold A and cope match plate C matched moulds, cover sand gap E on forming between the two, this covers sand gap E, and to be positioned at running gate system template 7 position preferred thickness be 12mm, covering sand gap E, to be positioned at cast model 6 position preferred thickness be 10mm, covers sand gap E and be positioned at from the beginning that the preferred thickness of metal-cored head is 3-5mm.
4 alignment pins 5 on the bottom die B also with lower template D on set pin sleeve 4 ' position corresponding one by one, guarantee the precision of matched moulds by set pin sleeve 4 ' and alignment pin 5.Be evenly distributed with 6 heating tubes 12 ' in the template 14 ' of lower template D, each heating tube 12 ' is 2.2kw, and is provided with temperature sensor 13 ' and carries out FEEDBACK CONTROL, realizes the adjustment of mould.
Be provided with 4 exhaust boss 10 ' on the die joint among the lower template D, each exhaust boss 10 ' highly is 0.3mm.Also be provided with 16 air discharge ducts 3 ' on the die joint of lower template D.Behind bottom die B and lower template D matched moulds, cover sand gap E ' under forming between the two, this covers sand gap E ', and to be positioned at running gate system template 7 ' position preferred thickness be 12mm, covering sand gap E ', to be positioned at cast model 6 ' position preferred thickness be 10mm, covers sand gap E ' and be positioned at from the beginning that the preferred thickness of metal-cored head is 3-5mm.
Cope match plate C and lower template D are separately fixed on the water-cooling subbase 8,8 ', and water-cooling subbase is fixedly mounted on the moulding machine workbench.During the energising heating, water-cooling subbase leads to cooling water, guarantees that the heat of template is not delivered to the moulding machine workbench up and down.
Precoated sand is incident upon and covers up and down sand gap E and E ' by covering sand molding machine sand-spraying hole.After covering layer of sand curing, upper metal mold A is separated with cope match plate C, bottom die B separates with lower template D, obtains respectively all covering up and down the metal mold die cavity of sand.Set aperture mud core is put into bottom die B, and this aperture mud core is metal covering sand moulds mud core, and it covers sand layer thickness and bottom die, and to cover sand layer thickness identical.Four aperture mud cores are used to form four apertures on the automobile differential housing ring wall.
Above content described in this specification only is to the explanation of the utility model structure example.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment; only otherwise depart from structure of the present utility model or surmount this scope as defined in the claims, all should belong to protection domain of the present utility model.
Claims (8)
1. casting mould that adopts metal type sand-covering casting of automobile differential casing, comprise metal mold, bottom die, cope match plate and lower template, upper metal mold is provided with sand-spraying hole, air discharge duct and set pin sleeve, bottom die is provided with lower sand-spraying hole and alignment pin, cope match plate comprises cast model, the running gate system template, water-cooling subbase, air tube, the exhaust boss, alignment pin, heating tube and temperature sensor, lower template comprises cast model, the running gate system template, water-cooling subbase, the exhaust boss, set pin sleeve, heating tube and temperature sensor, upper metal mold and cope match plate matched moulds, cover sand gap on forming between the two, bottom die and lower template matched moulds, cover sand gap under forming between the two, upper sand-spraying hole is corresponding one by one with lower sand-spraying hole position, upper sand-spraying hole with on cover the sand gap and be communicated with, lower sand-spraying hole with under cover the sand gap and be communicated with, it is characterized in that: described upper metal mold is provided with the metal-cored from the beginning of protrusion, metal-cored and upper metal mold is connected as a single entity from the beginning, this is the hollow cavity form fit of metal-cored shape and automobile differential housing from the beginning, be provided with exhaust apparatus on the described cope match plate, this exhaust apparatus is arranged on the from the beginning cope match plate cast model cavity bottom of metal-cored correspondence, also be provided with the aperture mud core that is used to form four apertures on the automobile differential housing ring wall in the bottom die die cavity, aperture mud core is the metal covering sand moulds structure.
2. the casting mould of employing metal type sand-covering casting of automobile differential casing according to claim 1, it is characterized in that: described exhaust apparatus comprises exhaust piston, spring, movable plate and return guide rod, return guide rod one end is arranged in the corresponding return guide rod hole of cope match plate, return guide rod therewith hole moves cooperation, the other end is fixedly installed on the movable plate, exhaust piston is installed on the movable plate, the position of exhaust piston is corresponding with the position of cope match plate upper air-vent, the diameter of exhaust piston is provided with spring than the little 0.3-0.4 millimeter of diameter of steam vent between movable plate and the water-cooling subbase.
3. the casting mould of employing metal type sand-covering casting of automobile differential casing according to claim 1, it is characterized in that: the wall thickness of described upper metal mold and bottom die is 20 ~ 30mm, cover up and down the sand gap of covering that is positioned at running gate system template position in the sand gap and be preferably 12mm, the sand gap of covering that is positioned at the cast model position is preferably 10mm, be positioned at from the beginning that the sand gap of covering of metal-cored head position is preferably 3-5mm, to cover sand layer thickness identical for cover sand layer thickness and the bottom die on every side of aperture mud core.
4. the casting mould of employing metal type sand-covering casting of automobile differential casing according to claim 1, it is characterized in that: be provided with 4 set pin sleeves on the described upper metal mold, be provided with 4 alignment pins on the bottom die, set pin sleeve and alignment pin all are cross distribution, both positions are corresponding one by one, the cross section of alignment pin is circular, and set pin sleeve is slotted hole.
5. the casting mould of employing metal type sand-covering casting of automobile differential casing according to claim 1, it is characterized in that: be respectively arranged with 6 heating tubes in described cope match plate and the lower template, about being evenly distributed on, heating tube in the template of template, also is provided with temperature sensor.
6. the casting mould of employing metal type sand-covering casting of automobile differential casing according to claim 1, it is characterized in that: the air tube on the described cope match plate is corresponding one by one with sand-spraying hole quantity and position on the upper metal mold.
7. the casting mould of employing metal type sand-covering casting of automobile differential casing according to claim 1 is characterized in that: be respectively arranged with a plurality of exhaust boss on the die joint of described cope match plate and lower template.
8. the casting mould of employing metal type sand-covering casting of automobile differential casing according to claim 1 is characterized in that: be respectively arranged with air discharge duct on the die joint of described upper metal mold and lower template.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220412652 CN202762955U (en) | 2012-08-20 | 2012-08-20 | Casting mould adopting metal type sand to cast automobile differential casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220412652 CN202762955U (en) | 2012-08-20 | 2012-08-20 | Casting mould adopting metal type sand to cast automobile differential casing |
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| Publication Number | Publication Date |
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| CN202762955U true CN202762955U (en) | 2013-03-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220412652 Withdrawn - After Issue CN202762955U (en) | 2012-08-20 | 2012-08-20 | Casting mould adopting metal type sand to cast automobile differential casing |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102784888A (en) * | 2012-08-20 | 2012-11-21 | 浙江省机电设计研究院有限公司 | Casting die and casting method for shell of automobile differential mechanism by sand-lined metal mold |
| CN104353792A (en) * | 2014-10-30 | 2015-02-18 | 河南省汤阴县华兴机械制造有限公司 | Differential mechanism shell casting process |
| CN105108070A (en) * | 2015-09-26 | 2015-12-02 | 侯马市晋烽机械铸造有限公司 | Method for casting end cap of non-transmission end of traction motor on subway locomotive |
| CN105598388A (en) * | 2016-01-07 | 2016-05-25 | 山东汇金股份有限公司 | Casting process of differential mechanism shell |
-
2012
- 2012-08-20 CN CN 201220412652 patent/CN202762955U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102784888A (en) * | 2012-08-20 | 2012-11-21 | 浙江省机电设计研究院有限公司 | Casting die and casting method for shell of automobile differential mechanism by sand-lined metal mold |
| CN104353792A (en) * | 2014-10-30 | 2015-02-18 | 河南省汤阴县华兴机械制造有限公司 | Differential mechanism shell casting process |
| CN105108070A (en) * | 2015-09-26 | 2015-12-02 | 侯马市晋烽机械铸造有限公司 | Method for casting end cap of non-transmission end of traction motor on subway locomotive |
| CN105598388A (en) * | 2016-01-07 | 2016-05-25 | 山东汇金股份有限公司 | Casting process of differential mechanism shell |
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Granted publication date: 20130306 Effective date of abandoning: 20150506 |
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