CN204770614U - Nodular cast iron casting structure with fin - Google Patents
Nodular cast iron casting structure with fin Download PDFInfo
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- CN204770614U CN204770614U CN201520369824.6U CN201520369824U CN204770614U CN 204770614 U CN204770614 U CN 204770614U CN 201520369824 U CN201520369824 U CN 201520369824U CN 204770614 U CN204770614 U CN 204770614U
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Abstract
The utility model discloses a nodular cast iron casting structure with fin, including foundry goods body, fin, the endothermic end position of fin in the thermal center at the crucial position of foundry goods body is regional, the radiating end of fin extends to the outside of foundry goods body, the thickness of fin is not less than 2mm, the fin is the thin slice of definite shape, the thickness of fin with the wall thickness or the positive correlation of thermal center modulus of foundry goods body, this application technical scheme has changed and has only passed through the chill in the traditional handicraft, the method of subsidy and rising head, in, among the small -size nodular cast iron spare casting process, come to adjust and to have suffered the casting mould and filling the type through set up the fin on the foundry goods body, solidify the method of cooling process moderate temperature field, reducing or avoiding using the rising head, under the condition of chill, make the mesh that whole casting mould reaches directional solidification or solidify simultaneously, thereby solve, the shrinkage porosite problem at displacement foundry goods thermal center position.
Description
Technical field
The utility model relates to the casting field of spheroidal graphite cast-iron, is specifically related to the gelled ductile cast iron casting structure of a kind of band.
Background technology
Along with the development of modern high technology, the kernel component of every profession and trade, as nodular iron casting, all in, function and serviceization development high to high strength, thin-walled, reliability, to satisfy the demands.The structure of nodular iron casting is more complicated, casting section thickness difference is larger, free shrink tendency increases, that have dispersion, that local thermal center is many feature.The local thermal center of dispersion is many, is difficult to realize feeding, such that the casting technique difficulty of nodular iron casting continues to increase, the sharply increase of manufacturing cost.
Now current, solve the shrinkage porosite problem that nodular iron casting causes because of thermal center, mainly adopt the processes such as chill, rising head and subsidy, by regulating temperature field to make whole casting mold be tending towards consecutive solidification or solidify simultaneously, to reach the object solving nodular iron casting shrinkage defect.But adopt these processes more or less all can serve adverse influence to the technological design of actual cast product, production and manufacturing cost band.
Such as, chill arrange can increase cast product technological design complexity, cycle and manufacturing cost; In addition, chill is placed and is carried out in modeling process, adds the difficulty of molding operation, there is problems such as placing displacement, working face and foundry goods are misfitted simultaneously, weakens or lose the effect of chill, cause cast(ing) surface and internal soundness problem.And the defect that rising head arranges technique is: 1, in foundry goods, lower portion should not arrange rising head, can increase the difficulty of technological design; 2, the product yield of foundry goods is directly reduced; 3, cleaning process and the difficulty of foundry goods is added; 4, the manufacturing cost of foundry goods is increased.The technique of subsidizing setting in addition can increase Mechanical processing of casting surplus, lowers product yield; Next changes the structure of product originally; In addition foundry goods is due to the restriction of casting structure, cannot subsidize processing capacity.The existence of the many disadvantages of above-mentioned each prior art is the problem demanding prompt solution perplexing numerous manufacturer.
Utility model content
In view of this, the application provides the gelled ductile cast iron casting structure of a kind of band and method for designing thereof, to change in traditional handicraft only by the method for chill, subsidy and rising head, in medium and small nodular iron casting casting technique, casting mold is had suffered in the method for filling temperature field in type, solidification process by arranging fin to regulate on foundry goods body, when reducing or avoid using rising head, chill, make the object that whole casting mold reaches consecutive solidification or solidifies simultaneously, thus the shrinkage porosite problem of solution, displacement casting heat energy-saving position.
For solving above technical problem, the technical scheme that the utility model provides is the gelled ductile cast iron casting structure of a kind of band, comprise foundry goods body, fin, the heat absorbing end of described fin is positioned at the thermal center region exterior of the key position of described foundry goods body, the radiating end of described fin extends to the outside of described foundry goods body, and the thickness of described fin is not less than 2mm.
Preferably, the heat absorbing end of described fin with the connected mode in described thermal center region is: the heat absorbing end of described fin is connected with the outside in described thermal center region.
Preferably, described fin is rectangular tab, and the length of described fin is 10-50mm, and the width of described fin is 10-50mm, and the length of described fin and width suitably should adjust according to the shape of foundry goods body and structure.
Preferably, described key position comprises:
A, foundry goods main body wall thickness are at 4-20mm, or thermal center circular diameter is not more than the position of 50mm;
The position of stressed in b, foundry goods main body, pressure-bearing, processing, boring, flaw detection;
Local, the isolated heat energy-saving position of the dispersion of c, foundry goods or be unsuitable for the heat energy-saving position that chill, core iron or rising head are set;
D, foundry goods have the position of ultrasonic examination, magnetic powder inspection requirement;
Namely described key position refers to the position needing thermal center to shift or eliminate in foundry goods body, and the scope that arranges of described fin also comprises the medium and small ductile cast iron casting that structure is more complicated, thermal center disperses; The local of foundry goods dispersion, isolated heat energy-saving position; Mechanical processing of casting amount is little, and processing capacity position, due to the restriction of casting structure, cannot be subsidized in some position.
Preferably, when the wall thickness of described foundry goods body is 6-20mm, the thickness of described fin is 2-12mm, the wall thickness of described foundry goods body and the thickness positive correlation of described fin.
More preferred, when described foundry goods main body wall thickness is 6-8mm, the thickness of described fin is 2mm; When described foundry goods main body wall thickness is 9-10mm, the thickness of described fin is 2-3mm; When described foundry goods main body wall thickness is 11-13mm, the thickness of described fin is 4-6mm; When described foundry goods main body wall thickness is 14-15mm, the thickness of described fin is 7-8mm; When described foundry goods main body wall thickness is 16-20mm, the thickness of described fin is 9-12mm.
Preferably, when described foundry goods body thermal center modulus is 1.5-5.0cm, the thickness of described fin is 2-12mm, the thermal center modulus of described foundry goods body and the thickness positive correlation of described fin.
More preferred, when the thermal center modulus of described foundry goods body is 1.5-2.0cm, the thickness of described fin is 2mm; When the thermal center modulus of described foundry goods body is 2.0-3.0cm, the thickness of described fin is 2-3mm; When the thermal center modulus of described foundry goods body is 3.0-3.5cm, the thickness of described fin is 4-6mm; When the thermal center modulus of described foundry goods body is 3.5-4.0cm, the thickness of described fin is 7-8mm; When the thermal center modulus of described foundry goods body is 4.0-5.0cm, the thickness of described fin is 9-12mm.
Described in the application, " thermal center region " refers to, molten iron is in process of setting, and foundry goods internal ratio surrounding metal solidifies node or regional area slowly, is alternatively the place of last cooled and solidified.Due to structure and casting parameter, in die cavity, the molten steel solidification time of the molten condition of each point is unequal, and this produces thermal stress will to foundry goods after solidification, causes casting deformation, crackle etc.; Meanwhile, due to the cooled and solidified time not etc., foundry goods there will be the defects such as shrinkage porosite, shrinkage cavity, cold shut, pore.
The application compared with prior art, it is described in detail as follows: technical scheme provides the gelled ductile cast iron casting structure of a kind of band and method for designing thereof, casting mold is had suffered in the method for filling temperature field in type, solidification process by arranging fin to regulate on foundry goods body, when reducing or avoid using rising head, chill, the object making whole casting mold reach consecutive solidification or solidify simultaneously, makes ductile cast iron casting have requirement, the spot shrinkage problem of significant points is alleviated, displacement or eliminate up hill and dale; In addition, can reduce or avoid foundry goods that chill is set in casting technique, containerless casting technique can be improved, 3D prints the efficiency of core manufacturing craft, be specially adapted to middle-size and small-size, the research and development of small lot ductile cast iron casting, production.With the process such as existing employing chill, rising head, subsidy, technical scheme has the effects such as technological operation is simple, process cycle is short, can keep original foundry goods body structure, yield rate are high.
Accompanying drawing explanation
Fig. 1 be in ductile cast iron casting structure described in technical scheme fin structure chart is set;
Fig. 2 is the profile at B-B place in Fig. 1.
Detailed description of the invention
In order to make those skilled in the art understand the technical solution of the utility model better, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As Fig. 1, shown in Fig. 2, the gelled ductile cast iron casting structure of a kind of band, comprise foundry goods body 1, fin 3, the heat absorbing end of described fin 3 is positioned at the thermal center region 2 of the key position of described foundry goods body 1, the heat absorbing end of described fin 3 inserts the inside in described thermal center region 2, the radiating end of described fin 3 extends to the outside of described foundry goods body 1, described fin 3 is rectangular tab, the length of described fin 3 is 10-50mm, the width of described fin 3 is 10-50mm, described fin 3 is for be formed with ductile cast iron casting simultaneously, the fin that material is identical.
As preferably, described key position comprises:
A, foundry goods main body 1 wall thickness are at 4-20mm, or thermal center circular diameter is not more than the position of 50mm;
The position of stressed in b, foundry goods main body 1, pressure-bearing, processing, boring, flaw detection;
Local, the isolated heat energy-saving position of the dispersion of c, foundry goods or be unsuitable for the heat energy-saving position that chill, core iron or rising head are set;
The position that d, foundry goods have ultrasonic examination (UT), magnetic powder inspection (MT) requires.
Wherein, when the wall thickness of described foundry goods body 1 is 6-20mm, the thickness of described fin 3 is 2-12mm, the wall thickness of described foundry goods body 1 and the thickness positive correlation of described fin 3, when described foundry goods body 1 thermal center modulus is 1.5-5.0cm, the thickness of described fin 3 is 2-12mm, the thermal center modulus of described foundry goods body 1 and the thickness positive correlation of described fin 3.
The concrete setting of described foundry goods body 1 wall thickness, foundry goods body 1 thermal center modulus, fin 3 thickness is as table 1.
Table 1 foundry goods body, heat sink sizes setting data
Above-mentioned ductile cast iron casting structure after design modifying is carried out initial workpiece processing, dissection, flaw detection, pressure testing, the actual effect of described fin is verified, and itself and traditional casting technique are contrasted, random selecting the application foundry goods, rising head technique foundry goods, each 200 of Chill foundry goods respectively, after empirical tests, add up each castings quantity, calculate product yield (qualification rate).Test data, contrast verification result are as table 2, table 3.
Wherein to casting structure carry out initial workpiece processing, dissection, flaw detection, pressure testing criterion of acceptability be: initial workpiece processing zero defect display; Dissection zero defect shows; Flaw detection reaches super spy II grade of requirement; Pressure testing hydraulic pressure ne-leakage.
The test data of fin in casting structure described in table 2 the application
The comparing result of casting process and traditional casting technique described in table 3 the application
Below be only preferred embodiment of the present utility model, it should be pointed out that above-mentioned preferred embodiment should not be considered as restriction of the present utility model, protection domain of the present utility model should be as the criterion with claim limited range.For those skilled in the art, not departing from spirit and scope of the present utility model, can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (8)
1. the gelled ductile cast iron casting structure of band, it is characterized in that: comprise foundry goods body, fin, the heat absorbing end of described fin is positioned at the thermal center region of the key position of described foundry goods body, the radiating end of described fin extends to the outside of described foundry goods body, and the thickness of described fin is not less than 2mm.
2. the gelled ductile cast iron casting structure of one band according to claim 1, is characterized in that: the heat absorbing end of described fin with the connected mode in described thermal center region is: the heat absorbing end of described fin is connected with the outside in described thermal center region.
3. the gelled ductile cast iron casting structure of one band according to claim 1, it is characterized in that: described fin is rectangular tab, the length of described fin is 10-50mm, and the width of described fin is 10-50mm.
4. the gelled ductile cast iron casting structure of one band according to claim 1, is characterized in that: described key position comprises:
A, foundry goods main body wall thickness are at 4-20mm, or thermal center circular diameter is not more than the position of 50mm;
The position of stressed in b, foundry goods main body, pressure-bearing, processing, boring, flaw detection;
Local, the isolated heat energy-saving position of the dispersion of c, foundry goods or be unsuitable for the heat energy-saving position that chill, core iron or rising head are set;
D, foundry goods have the position of ultrasonic examination, magnetic powder inspection requirement.
5. the gelled ductile cast iron casting structure of one band according to claim 1, it is characterized in that: when the wall thickness of described foundry goods body is 6-20mm, the thickness of described fin is 2-12mm, the wall thickness of described foundry goods body and the thickness positive correlation of described fin.
6. the gelled ductile cast iron casting structure of one band according to claim 5, it is characterized in that: when described foundry goods main body wall thickness is 6-8mm, the thickness of described fin is 2mm; When described foundry goods main body wall thickness is 9-10mm, the thickness of described fin is 2-3mm; When described foundry goods main body wall thickness is 11-13mm, the thickness of described fin is 4-6mm; When described foundry goods main body wall thickness is 14-15mm, the thickness of described fin is 7-8mm; When described foundry goods main body wall thickness is 16-20mm, the thickness of described fin is 9-12mm.
7. the gelled ductile cast iron casting structure of one band according to claim 1, it is characterized in that: when described foundry goods body thermal center modulus is 1.5-5.0cm, the thickness of described fin is 2-12mm, the thermal center modulus of described foundry goods body and the thickness positive correlation of described fin.
8. the gelled ductile cast iron casting structure of one band according to claim 7, it is characterized in that: when the thermal center modulus of described foundry goods body is 1.5-2.0cm, the thickness of described fin is 2mm; When the thermal center modulus of described foundry goods body is 2.0-3.0cm, the thickness of described fin is 2-3mm; When the thermal center modulus of described foundry goods body is 3.0-3.5cm, the thickness of described fin is 4-6mm; When the thermal center modulus of described foundry goods body is 3.5-4.0cm, the thickness of described fin is 7-8mm; When the thermal center modulus of described foundry goods body is 4.0-5.0cm, the thickness of described fin is 9-12mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520369824.6U CN204770614U (en) | 2015-06-01 | 2015-06-01 | Nodular cast iron casting structure with fin |
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| CN201520369824.6U CN204770614U (en) | 2015-06-01 | 2015-06-01 | Nodular cast iron casting structure with fin |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104889374A (en) * | 2015-06-01 | 2015-09-09 | 四川南车共享铸造有限公司 | Ductile cast iron casting piece structure with cooling fin and design method of same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104889374A (en) * | 2015-06-01 | 2015-09-09 | 四川南车共享铸造有限公司 | Ductile cast iron casting piece structure with cooling fin and design method of same |
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Address after: 641301 Ziyang City, Sichuan province Yanjiang District morning China World Trade Center Road No. 6 Building 2 floor Patentee after: Sichuan sharing Casting Co., Ltd. Address before: 641300 Ziyang City, Sichuan province Yanjiang District morning China World Trade Center Road No. 6 Building 2 floor Patentee before: SICHUAN NANCHE GONGXIANG CASTING CO., LTD. |