CN104741540A - Engine cylinder casting sand core, mould core structure, casting method and engine cylinder - Google Patents
Engine cylinder casting sand core, mould core structure, casting method and engine cylinder Download PDFInfo
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- CN104741540A CN104741540A CN201510149407.5A CN201510149407A CN104741540A CN 104741540 A CN104741540 A CN 104741540A CN 201510149407 A CN201510149407 A CN 201510149407A CN 104741540 A CN104741540 A CN 104741540A
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Abstract
The invention provides an engine cylinder casting sand core. The engine cylinder casting sand core comprises a first sand core body, wherein the first sand core body is provided with a first thin part; the first thin part is provided with a first molding surface and a second un-molding surface; the first molding surface extends towards the two sides of the firs sand core body to form bulge parts. The invention further provides an engine cylinder casting sand core structure, an engine cylinder casting method and an engine cylinder. The problem that the sand core deforms and is fractured in a casting process of the engine cylinder can be solved.
Description
Technical field
The present invention relates to engine casting field, be specifically related to motor cylinder casting core, core structure, casting method and engine cylinder-body.
Background technology
Cylinder body is the skeleton of engine, and the element of each parts and accessory system all will be arranged on cylinder body.In order to ensure that cylinder body works bearing under the complex stress condition such as stretch bending and vibration, there is very high requirement to the intensity of cylinder body, rigidity.
As shown in Figure 1, the design of engine cylinder-body 100 adopts tower structure substantially, mostly adopts at present and is distributed with oil back chamber 110 and upper gas chamber 120 in the left and right sides of cylinder body, and be furnished with main oil gallery 130 at the middle part upper position of oil back chamber 110.The lubricating oil of cylinder cap gets back to oil sump by oil back chamber 110 on the one hand, and crank case gases arrives gs-oil separator by upper gas chamber 120 on the other hand.
This structure not only achieves the function of cylinder cap oil return and crank case vent, and plays booster action to the Rigidity and strength of cylinder body, reduces the distortion of cylinder body, enables cylinder body bear higher detonation pressure, meets the requirement of performance and the continuous upgrading of discharge.
As shown in Figure 2, to form the core 200 of oil back chamber 110, this core 200 is longer, and in order to the moulding of main oil gallery 130, in the position of the formation main oil gallery of core body 200, main oil gallery forming part 230 place namely in Fig. 2, oil pocket core is thin compared with other position, because which form a weak point, and be relative thick portion 240 in weak point both sides.When casting metal liquid, the two ends of core 200 rely on fixed structure 210 and fixed structure 220 to fix.In fact, after casting metal liquid completes, molten iron will fill main oil gallery forming part 230, but now there is no main oil gallery 130, and main oil gallery 130 is formed by mach mode after the molten steel solidification at main oil gallery forming part 230 place.Main oil gallery moulding face 231 becomes the forming surface after molten steel solidification, or perhaps a part for the inner surface of oil back chamber 110.
With reference to figure 3, in prior art cylinder body 100 adopt forging type be: core 200 is horizontal, oil back chamber 110 down, upper gas chamber 120 upward, or upper gas chamber 120 down, oil back chamber 110 mode upward.Forging type was an example in the past, and in casting metal liquid process, because molten iron buoyancy f is very large, when casting, the weak point 230 of oil pocket core 200 easily ruptures.Even if oil back chamber core 200 does not rupture at weak point 230 place, because current casting technique is distributed in two ends for the fixed position of core 200, fixed structure 210 and fixed structure 220 is relied on to fix, under iron buoyancy of water f effect, core 200 can be out of shape, outline is dashed line shape by the solid line change in shape in Fig. 3, causes the oil back chamber wall unevenness after casting even, unfavorable to the Rigidity and strength of cylinder body 100.
Rupturing or core 200 problem on deformation for solving weak point 230 in prior art, as shown in Figure 4, near weak point 230, adopting stud 300 to support core 200 to offset the impact of molten iron buoyancy f.Stud 300 is supported on cylinder body external mold, and the complete rear stud 300 of casting metal liquid stays in molten iron a part for the outer wall forming cylinder body 100.
In actual casting metal liquid, because there are oil back chamber 110 or upper gas chamber 120 in cylinder body 100 left and right sides in Fig. 1, then as shown in Figure 5, the core 200 of top can adopt stud 300, and the side of below (near casting mould bottom surface) adopts the words of stud cannot find the strong point, between two cylinder holes 140, such as need continuous print molten iron to fill, therefore the method for stud cannot be adopted to offset iron buoyancy of water to the impact of core 200, and then cause core 200 to be out of shape, cylinder body oil back chamber wall unevenness, the problem that even core 200 ruptures due to molten iron buoyancy in casting process, productive temp and yield rate are had a strong impact on, cause the increase of man-hour and cost.That is, the problem of core deformation and fracture when adopting the method for stud thoroughly cannot solve casting.
Summary of the invention
The object of the invention is the problem solving core deformation and fracture in motor cylinder casting process, The embodiment provides following technical scheme for this reason:
A kind of motor cylinder casting core, comprise the first core body, described first core body has the first weak point, and described first weak point has the first moulding face and the first non-moulding face, and formation protuberance is stretched out in the both sides that described first non-moulding facings described first core body.
Preferably, described first weak point is the main oil gallery forming part of engine cylinder-body, and described first moulding face is main oil gallery moulding face.
Preferably, described first core body also has at least two thick portions, and described first weak part is between two described thick portions, and described thick portion and described first weak point are continuous print integrative-structure.
Preferably, described first core body is arranged side by side multiple, is connected between the first adjacent core body by described protuberance.
Preferably, described first core body is used for the shaping of oil back chamber or upper gas chamber.
A kind of motor cylinder casting core structure, comprise motor cylinder casting core as above, cylinder holes core, described first core body two ends are fixed, described cylinder holes core is provided with recess in crankcase shaping sector, described recess and described lobe shape are complementary, described first core body horizontal below described cylinder holes core and described recess and described protuberance fit.
Preferably, above-mentioned cylinder casting core structure, also comprises stud and the second core body, and described second core body has the second weak point, and described second core body is horizontal above described cylinder holes core, and described chaplet is above described second weak point.
A kind of motor cylinder casting method, comprising:
Build motor cylinder casting core structure as above in a mold;
Casting metal liquid;
Sand removal and remove cylinder holes core, described protuberance position forms the opening being communicated with oil back chamber or upper gas chamber and crankcase.
Preferably, when component motor cylinder casting core structure, also adopt stud and the second core body, described second core body is horizontal above described cylinder holes core, and described chaplet is above described second weak point.
A kind of engine cylinder-body, there is the opening be communicated with crankcase that casting is formed in the oil back chamber of described engine cylinder-body or upper gas chamber.
The present invention utilizes the protuberance stretched out on the first non-moulding face of the first weak point of core, strengthen the weight of weak point, and this protuberance does not affect the normally shaping of main oil gallery position, and in casting, first the laminating of the recess of cylinder holes core and the protuberance of core is utilized, utilize the crankcase shaping sector of cylinder holes core to press down the protuberance of core, secondly the weight of protuberance itself can reduce the adverse effect of molten iron buoyancy, makes the weak point of core upwards deformation can not occur.And after having cast, through sand removal, because protuberance is fallen clearly, naturally form one because of the connection upper gas chamber of casting formation or the opening of oil back chamber and crankcase, this opening can as the blow vent of crankcase, and casting technique is more simple, ventilates more smooth and easy.
Accompanying drawing explanation
Next will be described in further detail specific embodiments of the invention by reference to the accompanying drawings, wherein:
Fig. 1 is a kind of stereogram of typical engine cylinder-body;
Fig. 2 is the stereogram of the core of prior art;
Fig. 3 is the oil back chamber casting metal liquid process schematic of prior art;
Fig. 4 is oil back chamber casting metal liquid process schematic when adopting stud in prior art;
Fig. 5 is motor cylinder casting core structure figure in prior art;
Fig. 6 is the stereogram of the first core body of first embodiment of the present invention;
Fig. 7 is the front view of the first core body of first embodiment of the present invention;
Fig. 8 is the stereogram of the first core body of second embodiment of the present invention;
Fig. 9 is the motor cylinder casting core structure figure of embodiments of the invention;
Figure 10 is the stereogram of the engine cylinder-body adopting the core of prior art and core to cast out;
Figure 11 is the stereogram of the engine cylinder-body adopting the core of embodiments of the invention and core to cast out.
Description of symbols in figure: 100, engine cylinder-body, 110, oil back chamber, 120, upper gas chamber, 130, main oil gallery, 140, cylinder holes, 150, crankcase, 200, core, 210, fixed structure, 220, fixed structure, 230, weak point, 231, main oil gallery moulding face, 240, thick portion, 300, stud, 400, first core body, 410, first weak point, 411, first moulding face, 412, first non-moulding face, 420, thick portion, 430, protuberance, 500, second core body, 510, second weak point, 600, cylinder holes core, 610, cylinder holes shaping sector, 620, crankcase shaping sector, 621, recess, 700, engine cylinder-body, 710, oil back chamber, 720, upper gas chamber, 740, cylinder holes, 750, crankcase, 760, opening.
Detailed description of the invention
Composition graphs 6 and Fig. 7, motor cylinder casting core in the present embodiment, comprises the first core body 400, and identical with the core 200 in Fig. 2 is, first core body 400 has the first weak point 410, first weak point 410 and has the first moulding face 411 and the first non-moulding face 412.With the core 200 in Fig. 2 unlike, in the present embodiment, the first non-moulding face 412 is stretched out towards the both sides of the first core body 400 and is formed protuberance 430.First core body 400 is shaping for the oil back chamber 110 in Fig. 1 or upper gas chamber 120.Example is shaped to for oil back chamber 110, first weak point 410 of the first core body 400 is the main oil gallery forming part of engine cylinder-body, this part is owing to needing for more metal material is reserved in the main oil gallery processing after cast, therefore weak compared with the remainder of the first core body 400, and relative first weak point 410, first core body 400 has two relatively thick thick portions 420, first weak point 410 is between two thick portions 420, and the first weak point 410 and the second weak point 420 are continuous print integrative-structure.In practical application, in order to coordinate other moulding of engine cylinder-body, the first weak point 410 also may be utilized to form the structure of other needs reserved more metal material in casting process, and an only thick portion 420 can be had.In the present embodiment, the first moulding face 411 is main oil gallery moulding face, and after namely having cast, the main oil gallery 130 processed extends along the axial direction in the first moulding face 411.In fact, after sand removal, the first moulding face 411 becomes the forming surface after molten steel solidification, or perhaps a part for the inner surface of oil back chamber 110.And the first non-moulding face 412 forms the side of the inwall of oil back chamber 110 after sand removal, this face does not relate to the processing of main oil gallery 130, and in other words, main oil gallery 130 is not through the metal material at the first non-moulding face 412 place.
With reference to figure 8, in the present embodiment, the first core body 400 is arranged side by side multiple, and connected by protuberance 430 between the first adjacent core body 400, this, when needs form multiple oil back chamber 110 or upper gas chamber 120, can make the layout of core convenient.
With reference to figure 9, the motor cylinder casting core structure in the present embodiment comprises motor cylinder casting core, cylinder holes core 600, stud 300 and the second core body 500 in Fig. 6, Fig. 7 or Fig. 8.The structure of the second core body 500 can be identical with the structure in Fig. 2 or Fig. 3, in order to distinguish with the first core body 400, the weak point of the second core body 500 is called the second weak point 510.Cylinder holes core 600 has cylinder holes shaping sector 610 and crankcase shaping sector 620, and cylinder holes shaping sector 610 is shaping for the cylinder holes 140 in Fig. 1, and crankcase shaping sector 620 is for crankcase shaping of engine cylinder-body.Cylinder holes core 600 is provided with recess 621 at crankcase shaping sector 620 place, recess 621 and protuberance 430 shape complementarity.When building motor cylinder casting core, similar with Fig. 2, first core body 400 two ends are fixed, then by horizontal for the first core body 400 below cylinder holes core 600, namely, the length direction of the first core body 400 is close to level, and after having cast in other words, the oil back chamber 110 of the side of the engine cylinder-body 100 in Fig. 1 is actual is in below.The recess 621 of cylinder holes core 600 and the protuberance 430 of the first core body 400 are fitted.And the second core body 500 is horizontal above cylinder holes core 600, stud 300 is supported on above the second weak point 510.
In the present embodiment, the first core body 400 is for casting formation oil back chamber, and the second core body 500 for casting formation upper gas chamber, but also can adopt the first core body 400 to cast upper gas chamber in actual production.
Build motor cylinder casting core structure as shown in Figure 9 in casting mould after, liquid metals is poured into a mould in mould, owing to being in the existence of the protuberance 430 that the first non-moulding face 412 of the first weak point 410 of the first core body 400 of below is stretched out, make the laminating of the recess 621 of cylinder holes core 600 and the protuberance 430 of the first core body 400, first the crankcase shaping sector 620 of cylinder holes core 600 can be utilized in casting process to press down this protuberance 430, make buoyancy f that the first weak point 410 can not be made upwards deformation to occur, secondly protuberance 430 makes the weight of the first weak point 410 be improved, the weight of protuberance 430 itself can reduce the adverse effect of the buoyancy of molten iron or other metal liquid, therefore in the process of casting metal liquid, the more difficult generation deformation of first weak point 410 or fracture.And for the second core body 500, for the support of stud 300, also can not there is deformation or fracture in its second weak point 510.
Contrast Figure 10 and Figure 11.Wherein Figure 10 be by the engine cylinder-body 100 in Fig. 1 from bottom observable view.In the prior art, after casting complete, through sand removal and remove core, oil back chamber 110 and cylinder holes 140, crankcase 150 are shaping, and are completely cut off by metal material between crankcase 150 and oil back chamber 110 or upper gas chamber 120.And in fig. 11, after casting complete, through sand removal and remove core, cylinder holes core 600 is removed, the position of the cylinder holes shaping sector 610 of cylinder holes core 600 forms cylinder holes 740, and the position of crankcase shaping sector 620 forms crankcase 750, and the position that engine cylinder-body 700 is fitted with recess 621 at corresponding protuberance 430, because protuberance 430 is fallen clearly together with whole first core body 400, naturally just define the opening 760 that is communicated with oil back chamber 710 and crankcase 750.
In actual production, the upper gas chamber 720 of engine cylinder-body 700 also can adopt the first core body 400 to cast, and after having cast, upper gas chamber 720 also can fall because protuberance 430 is cleaned and form the opening 760 be communicated with crankcase 750, this opening 760 can as the blow vent of crankcase 750, and making crank case gases arrive gs-oil separator by opening 760, casting technique is simple.
Although the present invention is described in conjunction with above embodiment, but the present invention is not defined to above-described embodiment, and only by the restriction of claim, those of ordinary skill in the art can easily modify to it and change, but do not leave essential idea of the present invention and scope.
Claims (10)
1. a motor cylinder casting core, it is characterized in that, comprise the first core body, described first core body has the first weak point, described first weak point has the first moulding face and the first non-moulding face, and formation protuberance is stretched out in the both sides that described first non-moulding facings described first core body.
2. motor cylinder casting core according to claim 1, is characterized in that, described first weak point is the main oil gallery forming part of engine cylinder-body, and described first moulding face is main oil gallery moulding face.
3. motor cylinder casting core according to claim 1, it is characterized in that, described first core body also has at least two thick portions, and described first weak part is between two described thick portions, and described thick portion and described first weak point are continuous print integrative-structure.
4. motor cylinder casting core according to claim 1, is characterized in that, described first core body is arranged side by side multiple, is connected between the first adjacent core body by described protuberance.
5. the motor cylinder casting core according to any one in Claims 1-4, is characterized in that, described first core body is used for the shaping of oil back chamber or upper gas chamber.
6. a motor cylinder casting core structure, it is characterized in that, comprise the motor cylinder casting core as described in any one in claim 1 to 5, cylinder holes core, described first core body two ends are fixed, described cylinder holes core is provided with recess in crankcase shaping sector, described recess and described lobe shape are complementary, described first core body horizontal below described cylinder holes core and described recess and described protuberance fit.
7. motor cylinder casting core structure according to claim 6, it is characterized in that, also comprise stud and the second core body, described second core body has the second weak point, described second core body is horizontal above described cylinder holes core, and described chaplet is above described second weak point.
8. a motor cylinder casting method, is characterized in that, comprising:
Build motor cylinder casting core structure as claimed in claim 6 in a mold;
Casting metal liquid;
Sand removal and remove cylinder holes core, described protuberance position forms the opening being communicated with oil back chamber or upper gas chamber and crankcase.
9. motor cylinder casting method according to claim 8, it is characterized in that, when component motor cylinder casting core structure, also adopt stud and the second core body, described second core body is horizontal above described cylinder holes core, and described chaplet is above described second weak point.
10. an engine cylinder-body, is characterized in that, the oil back chamber of described engine cylinder-body or upper gas chamber exist the opening be communicated with crankcase that casting is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510149407.5A CN104741540B (en) | 2015-03-31 | 2015-03-31 | Motor cylinder casting core, core structure, casting method and engine cylinder-body |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510149407.5A CN104741540B (en) | 2015-03-31 | 2015-03-31 | Motor cylinder casting core, core structure, casting method and engine cylinder-body |
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| CN104741540A true CN104741540A (en) | 2015-07-01 |
| CN104741540B CN104741540B (en) | 2016-10-12 |
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| CN201510149407.5A Expired - Fee Related CN104741540B (en) | 2015-03-31 | 2015-03-31 | Motor cylinder casting core, core structure, casting method and engine cylinder-body |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106040988A (en) * | 2016-08-03 | 2016-10-26 | 日月重工股份有限公司 | Production method of diesel engine body sand core for ships |
| CN106270400A (en) * | 2016-11-07 | 2017-01-04 | 江铃汽车股份有限公司 | A kind of elongated oil duct sand core structure of sleeping pouring technique cylinder body |
| CN106925720A (en) * | 2017-04-17 | 2017-07-07 | 大连旅桑实业有限公司 | A kind of sand mold mould for casting arm type casting long |
| CN112282958A (en) * | 2020-10-30 | 2021-01-29 | 东风汽车集团有限公司 | Oil return channel structure of high-pressure cast aluminum alloy cylinder body |
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| CN204584195U (en) * | 2015-03-31 | 2015-08-26 | 安徽江淮汽车股份有限公司 | Motor cylinder casting core, core structure and engine cylinder-body |
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Patent Citations (5)
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| CN201474784U (en) * | 2009-08-31 | 2010-05-19 | 上海通用汽车有限公司 | Engine cylinder body |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106040988A (en) * | 2016-08-03 | 2016-10-26 | 日月重工股份有限公司 | Production method of diesel engine body sand core for ships |
| CN106270400A (en) * | 2016-11-07 | 2017-01-04 | 江铃汽车股份有限公司 | A kind of elongated oil duct sand core structure of sleeping pouring technique cylinder body |
| CN106925720A (en) * | 2017-04-17 | 2017-07-07 | 大连旅桑实业有限公司 | A kind of sand mold mould for casting arm type casting long |
| CN112282958A (en) * | 2020-10-30 | 2021-01-29 | 东风汽车集团有限公司 | Oil return channel structure of high-pressure cast aluminum alloy cylinder body |
| CN112282958B (en) * | 2020-10-30 | 2022-01-21 | 东风汽车集团有限公司 | Oil return channel structure of high-pressure cast aluminum alloy cylinder body |
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| CN104741540B (en) | 2016-10-12 |
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Address after: 230601 Anhui Province, Hefei City Industrial Park, the Peach Blossom Road No. 669 Patentee after: ANHUI JIANGHUAI AUTOMOBILE GROUP Corp.,Ltd. Address before: 230601 Anhui Province, Hefei City Industrial Park, the Peach Blossom Road No. 669 Patentee before: ANHUI JIANGHUAI AUTOMOBILE Co.,Ltd. |
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Granted publication date: 20161012 |