CN205032646U - Long and thin cast hole's of diesel engine camshaft high accuracy shaping psammitolite - Google Patents
Long and thin cast hole's of diesel engine camshaft high accuracy shaping psammitolite Download PDFInfo
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- CN205032646U CN205032646U CN201520798391.6U CN201520798391U CN205032646U CN 205032646 U CN205032646 U CN 205032646U CN 201520798391 U CN201520798391 U CN 201520798391U CN 205032646 U CN205032646 U CN 205032646U
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- steel pipe
- refractory brick
- dry sand
- diesel engine
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Abstract
The utility model provides a long and thin cast hole's of diesel engine box camshaft high accuracy shaping psammitolite, includes that refractory brick sleeve pipe, technology steel pipe, dry sand layer and terminal surface seal the layer, and the technology steel pipe sets up in refractory brick sheathed tube hole, sets up with one heart between the two, is equipped with the dry sand layer between technology steel pipe and refractory brick sheathed tube hole, and the both ends face on the dry sand layer is equipped with the terminal surface and seals the layer to the fixed dry sand layer of sealing. Be equipped with the bleeder vent on the body of technology steel pipe. The elongated hole shaping psammitolite refractoriness of this kind of structure is high, and it is strong that bending strength is high, the scour protection decreases the performance, and the gas permeability is good, and the casting elongated hole's that obtains size precision, shape precision and straightness accuracy are all very high, and steel pipe repeatedly usable is not met with having to technology simultaneously, and casting low in production cost can satisfy greatly the batch steadily and cast the production requirement.
Description
Technical field:
The utility model relates to casting field, particularly relates to a kind of shaping sand core structure of elongated casting hole, high by the core refractoriness of this molding structure, and rigidity and good permeability can reduce the Foundry Production cost of foundry goods.
Background technology:
Camshaft casting hole on the casing of single cylinder diesel is made up of two coaxial string holes systems, the technical requirement such as dimensional accuracy, form accuracy, linearity of elongate cam axle casting pore-creating is all very high, the elongated casting hole of camshaft is obtained by forging type, elongated hole casting sand core must be used in Foundry Production, existing elongated hole casting sand core material is generally resin core sand, waterglass core sand, clay core sand, wick sand etc., and wherein resin core sand is most widely used.Because core belongs to slender axles, its intensity, anti-bending strength is very poor, and the core structure of elongated spindle-type in foundry goods casting cycle not only easily by molten iron scaling loss or thrust, and elongated core surround by the molten iron of high temperature, be easy in the elongated casting hole casting formation thus produce sepage, scab, pore, the defects such as distortion, therefore, the core of casting elongated hole is except should having the performance of general core, also require higher refractoriness, comparatively high resistance fractures intensity and bending resistance, Rigidity and strength should be had, there is good gas permeability again, deformability and collapsibility.
In order to overcome the deficiency of depositing in prior art, the structure of existing elongated casting hole core mainly contains following two kinds:
1. seamless steel pipe inlaying process: choose the seamless steel pipe that internal diameter is identical with casting elongated hole diameter, processing of rust removing or coating process are carried out to seamless steel pipe outer surface, then seamless steel pipe is put into core box and substitute core, and in steel pipe, fill up resin sand or other filler with proof strength, rear steel pipe to be cast will be embedded on foundry goods, thus the elongated straight hole needed for obtaining.In this founding method, its essence is and seamless steel pipe is bumped in foundry goods, using the endoporus of seamless steel pipe as target hole, in actual casting process, may exist between seamless steel pipe and foundry goods body and refute gap gap, it is only applicable to general foundry goods, for the foundry goods that technical requirement is higher, two kinds of metal materials are not allowed, this scheme can not use, even if permission seamless steel pipe is as cast setting part, require between seamless steel pipe and molten metal, there is good welding performance, and seamless steel pipe can not be melted.The elongated straight hole of this foundry goods requires that the wall thickness at casting hole place is enough large simultaneously, therefore the thermal center at foundry goods elongated straight hole place is large, radiating condition is poor, seamless steel pipe is under high-temperature liquid metal for a long time liquid effect, seamless steel pipe is easy to be melted, thus by the core sand melt surface in the pipe of seamless steel pipe, cause blowhole skew, the interior sepage of pipe, scab to clear up, cause foundry goods to scrap.Steel pipe must eliminate rust or electroplating processes to seamless steel pipe surface before casting, if seamless steel pipe surface treatment is improper or be subject to polluting, be easy to make the elongated hole surface of foundry goods to occur gas hole defect, seamless steel pipe cannot reclaim in this scenario, therefore casts cost very high.
2. the resin sand core of band steel pipe bone is adopted: in core box, put into inner wall belt passage steel pipe bone, roughing sand uses the special sand such as chromite sand, nice foundry sand that refractoriness is higher, thus the refractoriness of guarantee core, intensity, rigidity and gas permeability, this resin sand core not only anti-impact damage performance does not thoroughly solve, the dimensional accuracy of elongated casting hole, form accuracy are also difficult to ensure, and the extraordinary roughing sand used is expensive, casting cost is high.
Utility model content:
In order to overcome the deficiency that prior art exists ideally, the utility model provides the high-precision modeling core of the elongated casting hole of a kind of diesel engine box body camshaft, the elongated hole shaping core refractoriness of this structure is high, bending strength is high, anti-crushing performance is strong, good permeability, the dimensional accuracy of the casting elongated hole obtained, form accuracy and linearity are all very high, and technique nothing meets steel pipe reusable simultaneously, Foundry Production cost is low, stably can meet Foundry Production requirement in enormous quantities.
The technical scheme that the utility model is taked is as follows:
The high-precision modeling core of the elongated casting hole of a kind of diesel engine box body camshaft, comprise refractory brick sleeve pipe, technique steel pipe, dry sand and sealed port of butt end layer, technique steel pipe is arranged in the endoporus of refractory brick sleeve pipe, arrange with one heart between the two, dry sand is provided with between technique steel pipe and the endoporus of refractory brick sleeve pipe, sealed port of butt end layer is provided with, with fixed closed dry sand in the both ends of the surface of dry sand.
Further, the body of technique steel pipe is provided with air-vent.
Further, air-vent is arranged on the body of technique steel pipe equably.
Further, the diameter of described air-vent is 1 ~ 5 millimeter.
Further, described refractory brick sleeve pipe is overall structure or segmentation docking structure.
Further, the radial thickness of dry sand is 3 ~ 10 millimeters.
Further, in the endoporus of technique steel pipe, resin sand post has been tamped.
Because the utility model adopts the refractory brick sleeve pipe with excellent fire resistance and excellent air permeability as the core outer surface of elongated casting hole, refractory brick sleeve pipe is provided by specialized vendor, precision is high, length can be determined arbitrarily, also the mode that axis hole docks can be adopted to lengthen, to meet technological requirement, without meeting between steel pipe and refractory brick sleeve pipe, the core bending strength that dry sand 3 can improve elongated casting hole is being set, shaking out after being convenient to cast form again takes out technique steel pipe, be more conducive to follow-up refractory brick sleeve pipe and smash removing, meet on the body of steel pipe in nothing and exhaust when air-vent is more conducive to cast is set, sealed port of butt end layer is provided with in the both ends of the surface of technique steel pipe and refractory brick sleeve pipe, its objective is fixed closed dry sand, prevent the dry sand in dry sand to wander about as a refugee inefficacy.In the endoporus of technique steel pipe, tamp resin sand post, intensity, the rigidity of whole elongated casting hole core can have been improved further.
Adopt the core of the elongated casting hole of this structure can not only eliminate normal sands wicking surface refractoriness low, easily by high temperature liquid iron scaling loss, burn, the defect that punching is damaged or thrust, ensure the shape type quality of elongated casting hole, improve the qualification rate of cast member, and can be convenient to shake out and the recovery of technique steel pipe is reused, compared with prior art, the utility model is adopted to carry out the casting of elongated casting hole, the elongated casting hole not only dimensional accuracy obtained, form accuracy and hole shape linearity are all higher than prior art, and technique steel pipe and dry sand all reusable, sand using amount is few, casting cost is low.
The advantage that the utility model has:
Adopt refractory brick sleeve pipe and technique steel pipe as the molding structure of core, dry sand is filled in the annular gap formed between technique steel pipe and refractory brick sleeve pipe, and steam vent is set up on technique steel pipe body, if refractory brick sleeve pipe adopts docking structure, at joint brushing alcohol-base paint and drying and processing, ensure that the refractoriness of core, intensity, rigidity and gas permeability, prevent from producing sepage, scab and pore, deformation defect in elongated hole, reduce castings production cost.Especially for the elongated hole of thick and large casting, easily length circular hole, square hole, the profiled holes of generation Sand Penetration, as long as ensure the strength and stiffness that refractory brick tube core is enough, is cast iron, steel-casting all can adopt refractory brick tube batch making core.Silica fire resistant brick sleeve pipe selected by ironcasting, and steel-casting selects high-alumina refractory brick sleeve pipe.
Adopt refractory brick control core, operation is simple, can filling dry sand or resin sand in pipe, and than adopting the coremaking of the special sand such as chromite sand, nice foundry sand, casting cost is low, good in economic efficiency, is worth of widely use.
Accompanying drawing illustrates:
Fig. 1 is a kind of structural representation of prior art;
Fig. 2 is a kind of structural representation of the present utility model;
Fig. 3 is another kind of structural representation of the present utility model;
In figure: 1-refractory brick sleeve pipe; 2-technique steel pipe; 3-dry sand; 4-sealed port of butt end layer; 5-air-vent; 6-resin sand post.
Detailed description of the invention:
Below in conjunction with accompanying drawing, the technical solution of the utility model is clearly and completely described.
Embodiment 1: the high-precision modeling core of the elongated casting hole of a kind of diesel engine box body camshaft, by refractory brick sleeve pipe 1, technique steel pipe 2, dry sand 3 and sealed port of butt end layer 4 form, the outside diameter of refractory brick sleeve pipe 1 is identical with elongated casting hole aperture to be cast on foundry goods, the pipe thickness of refractory brick sleeve pipe 1 is 5 ~ 10 millimeters, the external diameter of technique steel pipe 2 is less than the diameter of bore of refractory brick sleeve pipe 1 10 ~ 30 millimeters, technique steel pipe 2 is arranged in the endoporus of refractory brick sleeve pipe 1, arrange with one heart between the two, dry sand 3 is provided with between technique steel pipe 2 cylindrical and the endoporus of refractory brick sleeve pipe 1, sealed port of butt end layer 4 is provided with in the both ends of the surface of dry sand 3, with fixed closed dry sand 3, the body of technique steel pipe 2 is provided with air-vent 5 equably, the diameter of described air-vent is 1 ~ 5 millimeter.
Using method of the present utility model is as follows:
By prior art using method casting moulding box in place the utility model, cast by prior art, to be cooled shaping after shake out, to the method for shaking out of elongated casting hole be wherein:
Do the sealed port of butt end layer hit between technique steel pipe and refractory brick sleeve pipe with pane hammer, make the fragmentation of sealed port of butt end layer refute from, by dry sand evacuation, extract technique steel pipe out, again with breaking device by refractory brick sleeve pipe, broken refractory brick sleeve pipe is separated with foundry goods, forms the elongated casting hole of expection.
Embodiment of the present utility model is a lot, and described refractory brick sleeve pipe both overall structures also can be segmentation docking structures.The radial thickness of dry sand artificially can be determined according to the pore size of elongated casting hole, as long as can be convenient to take out technique steel pipe.
In order to improve the intensity of core described in the utility model, rigidity and bending resistance further, resin sand post 6 can be tamped in the endoporus of technique steel pipe 2.
Embodiment of the present utility model is not limited to example, also has the function replacing structures such as a lot, as long as adopt all technical schemes of technical thought of the present utility model all to belong to protection domain of the present utility model.
Claims (7)
1. the high-precision modeling core of the elongated casting hole of diesel engine box body camshaft, it is characterized in that: comprise refractory brick sleeve pipe (1), technique steel pipe (2), dry sand (3) and sealed port of butt end layer (4), technique steel pipe (2) is arranged in the endoporus of refractory brick sleeve pipe (1), arrange with one heart between the two, dry sand (3) is provided with between technique steel pipe (2) and the endoporus of refractory brick sleeve pipe (1), sealed port of butt end layer (4) is provided with, with fixed closed dry sand (3) in the both ends of the surface of dry sand (3).
2. the high-precision modeling core of the elongated casting hole of diesel engine box body camshaft according to claim 1, is characterized in that: on the body of technique steel pipe (2), be provided with air-vent (5).
3. the high-precision modeling core of the elongated casting hole of diesel engine box body camshaft according to claim 2, is characterized in that: air-vent (5) is arranged on the body of technique steel pipe (2) equably.
4. the high-precision modeling core of the elongated casting hole of diesel engine box body camshaft according to claim 2, is characterized in that: the diameter of described air-vent (5) is 1 ~ 5 millimeter.
5. the high-precision modeling core of the elongated casting hole of diesel engine box body camshaft according to claim 1, is characterized in that: described refractory brick sleeve pipe (1) is overall structure or segmentation docking structure.
6. the high-precision modeling core of the elongated casting hole of diesel engine box body camshaft according to claim 1, is characterized in that: the radial thickness of dry sand (3) is 3 ~ 10 millimeters.
7. the high-precision modeling core of the elongated casting hole of diesel engine box body camshaft according to claim 1, is characterized in that: in the endoporus of technique steel pipe (2), tamped resin sand post (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520798391.6U CN205032646U (en) | 2015-10-15 | 2015-10-15 | Long and thin cast hole's of diesel engine camshaft high accuracy shaping psammitolite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520798391.6U CN205032646U (en) | 2015-10-15 | 2015-10-15 | Long and thin cast hole's of diesel engine camshaft high accuracy shaping psammitolite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205032646U true CN205032646U (en) | 2016-02-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520798391.6U Expired - Fee Related CN205032646U (en) | 2015-10-15 | 2015-10-15 | Long and thin cast hole's of diesel engine camshaft high accuracy shaping psammitolite |
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| Country | Link |
|---|---|
| CN (1) | CN205032646U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108817317A (en) * | 2018-07-06 | 2018-11-16 | 大连金河铸造有限公司 | A kind of improved ram lumen elongated hole blowhole technique |
| CN109954838A (en) * | 2017-12-25 | 2019-07-02 | 科华控股股份有限公司 | A kind of elongated hole forming sand core structure of casting |
-
2015
- 2015-10-15 CN CN201520798391.6U patent/CN205032646U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109954838A (en) * | 2017-12-25 | 2019-07-02 | 科华控股股份有限公司 | A kind of elongated hole forming sand core structure of casting |
| CN108817317A (en) * | 2018-07-06 | 2018-11-16 | 大连金河铸造有限公司 | A kind of improved ram lumen elongated hole blowhole technique |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160217 Termination date: 20181015 |