CN210730910U - Crankcase casting system and crankcase - Google Patents
Crankcase casting system and crankcase Download PDFInfo
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- CN210730910U CN210730910U CN201920990009.XU CN201920990009U CN210730910U CN 210730910 U CN210730910 U CN 210730910U CN 201920990009 U CN201920990009 U CN 201920990009U CN 210730910 U CN210730910 U CN 210730910U
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Abstract
The utility model provides a crankshaft box casting system and a crankshaft box, which comprises a plurality of ingates and a cavity communicated with the ingates; at least one ingate communicated with the cavity is arranged near the position where the shrinkage cavity is easy to generate during the casting of the crankcase body; an ingate communicated with the cavity is arranged at the pedal hole of the crankcase body; the pouring system for the crankcase body is additionally provided with the ingate near the position where the shrinkage cavity is generated, and the ingate is additionally arranged at the pedal, so that the pouring amount is increased, the punching is facilitated, the shrinkage cavity is reduced, the shrinkage cavity is avoided, and the air leakage of a threaded hole is avoided; the thickness of the pouring gate is reduced, so that the slag avoiding capability of the pouring gate is enhanced, and the risk of material shortage is reduced; after the pouring channel is improved, the air leakage rate of the crankcase body can be reduced to 0, the qualification rate of products can be greatly improved, and the product quality is improved.
Description
Technical Field
The utility model relates to a mould casting field, concretely relates to bent axle box casting system and bent axle box.
Background
The crankcase body of the engine is formed by connecting a left crankcase body and a right crankcase body, and is generally cast and molded by a casting mold, so that the requirement on air tightness is high. Factors influencing the air tightness of the crankcase body are various, for example, a gas shrinkage hole is easily generated in the casting process, particularly in the casting cooling process, and the gas leakage problem is caused due to the fact that the serious gas shrinkage hole can cause shrinkage cracks. The air leakage rate of the existing CG125 left crankcase body can reach more than 10 percent, which is a main quality problem. In order to reduce the air leakage caused by the product shrinkage cavity, a proper design of the mold casting system is necessary.
The existing casting system mainly has the following problems:
1) the cross section area of an inner pouring gate of the casting system is insufficient, and the pouring amount in unit time is insufficient;
2) the position of the sprue, which is far away from the position where the gas shrinkage cavity is generated, is not ideal in the pressurizing feeding condition;
3) the gate has larger thickness and insufficient slag avoiding capability, so that the gate is easy to have the phenomenon of material shortage;
4) the gas shrinkage cavity is easy to generate, the waste rate is high, and the product percent of pass is low.
Based on above problem, the utility model provides a bent axle box casting system and bent axle box. The pouring system for the crankcase body is additionally provided with the ingate near the position where the shrinkage cavity is generated, and the ingate is additionally arranged at the pedal position, so that the pouring amount is increased, the shrinkage cavity is reduced, the shrinkage cavity is even avoided, and the air leakage of a threaded hole is avoided; by reducing the thickness of the pouring gate, the slag avoiding capability of the pouring gate can be enhanced, and the risk of material shortage is reduced; after the pouring channel is improved, the air leakage rate of the crankcase body can be reduced to 0, the qualification rate of products is greatly improved, and the product quality is improved.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a crankcase casting system adds the ingate near the position that the shrinkage cavity produced to increase the ingate in pedal position, do benefit to increase and advance watering volume and reduce the shrinkage cavity and even avoid the shrinkage cavity, avoid the screw hole gas leakage; the thickness of the pouring gate is reduced, so that the slag avoiding capability of the pouring gate is enhanced, and the risk of material shortage is reduced; after the pouring channel is improved, the air leakage rate of the crankcase body can be reduced to 0, the qualification rate of products can be greatly improved, and the product quality is improved.
The utility model discloses a crankcase casting system, which comprises a plurality of ingates and a cavity communicated with the ingates; at least one ingate communicated with the cavity is arranged near the position where the shrinkage cavity is easy to generate during the casting of the crankcase body; the cavity is a cavity for forming a crankcase body casting and is not marked in the drawing; an ingate is added near the position where the shrinkage cavity is generated, so that the distance of pressurization pressure feeding is favorably shortened, the effect of pressurization pressure feeding is improved, the pouring amount is favorably increased, the shrinkage cavity is favorably reduced, the shrinkage cavity is even avoided, and the product quality and the qualified rate are improved; the selection of the material of the casting mold and the molding technique belong to the prior art, and are not described herein.
Furthermore, an inner pouring channel communicated with the cavity is arranged at a pedal hole of the crankcase body; the pouring area of the product is improved, the filling amount of pouring liquid in unit time is increased, and the appearance quality and the internal quality of the product are improved;
furthermore, the included angle between the central line of the plurality of ingate outlets and the central line of the corresponding cavity inlet is 70°～85°Preferably 85°(ii) a The problems of material shortage and insufficient feeding capacity in the casting process are solved by changing the casting direction;
further, the ratio of the thickness of a sprue gate of the ingate to the thickness of a casting formed at the connection part of the corresponding cavity is 2.8: 4-3: 4, and preferably 2.8: 4; the ratio of the gate thickness to the gate width of the ingate is 2.8: 20-2.8: 35, preferably 2.8: 20; the reduction of the gate thickness of the ingate is beneficial to reducing the sucking area of the ingate, improving the slag resistance and reducing the risk of material shortage, and meanwhile, the damage to the casting when the ingate is separated from the casting can be reduced, and the appearance quality of the product is ensured;
further, the runner is communicated with the ingate and is approximately V-shaped; the reasonable layout of the pouring channel of the casting system is facilitated;
furthermore, a plurality of ingates are arranged at intervals on two V-shaped sides of the horizontal runner, and the inlet of the horizontal runner is positioned at the bottom of the V shape; one side of the V-shaped cross pouring gate extends to the side close to the crankshaft hole, and the other side wall extends to the pedal hole side; pouring liquid which enters the transverse pouring gate through the outer pouring gate and the straight pouring gate in sequence is stably distributed and guided to two sides in the transverse pouring gate, and then enters the cavity through the plurality of inner pouring gates, so that the reasonable layout of pouring channels of a pouring system is facilitated, and the steady flow and the flow guiding effect on the pouring liquid are facilitated;
further, the cross sections of the transverse pouring channel and the inner pouring channel are circular, trapezoidal or rectangular, and are preferably trapezoidal with arc treatment; the inner walls of the communication part of the horizontal pouring channel and the inner pouring channel and the communication part of the inner pouring channel and the cavity are subjected to smooth arc transition treatment; the flow stabilization effect on the pouring liquid is favorably exerted;
further, the casting system further comprises a plurality of exhaust passages; the exhaust channels are correspondingly arranged on the other side of the cavity relative to the ingates; the sequential filling of aluminum water and the exhaust of the cavity are facilitated;
furthermore, the plurality of exhaust passages are respectively provided with an expansion chamber, so that slag accumulation is facilitated;
the utility model also provides a crankcase body, crankcase body according to as above the pouring of crankcase body casting system and get.
The utility model has the advantages that: the utility model provides a crankcase body casting system adds the ingate near the position that the shrinkage cavity produced, and increases the ingate at the pedal, does benefit to and increases the volume of watering and does benefit to the type of dashing, does benefit to and reduces the shrinkage cavity and avoids the shrinkage cavity, avoids the screw hole gas leakage; the thickness of the pouring gate is reduced, so that the slag avoiding capability of the pouring gate is enhanced, and the risk of material shortage is reduced; after the pouring channel is improved, the air leakage rate of the crankcase body can be reduced to 0, the qualification rate of products can be greatly improved, and the product quality is improved.
Drawings
The invention will be further described with reference to the following figures and examples:
fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
Fig. 1 is a schematic structural diagram of the present invention, as shown in the figure: the crankcase casting system of the embodiment comprises a plurality of ingates 1 and a cavity communicated with the ingates 1; at least one ingate 1 communicated with a cavity is arranged near the position where a shrinkage cavity 2 is easy to generate during crankcase body casting; the cavity is a cavity for forming a crankcase body casting and is not marked in the drawing; the ingate 1 is added near the position where the shrinkage cavity 2 is generated, so that the distance of pressurization pressure feeding is reduced, the effect of pressurization pressure feeding is improved, the pouring amount is increased, the shrinkage cavity is reduced, the shrinkage cavity is avoided, and the product quality and the qualified rate are improved; the selection of the material of the casting mold and the molding technique belong to the prior art, and are not described herein.
In the embodiment, an ingate 1 communicated with a cavity is arranged at a pedal hole 3 of the crankcase body; the pouring area of the product is further improved, the pouring area can be increased by more than 20% through the two inner pouring channels 1 additionally arranged at the pedal hole 3 and near the shrinkage cavity 2, and the filling amount of pouring liquid in unit time is increased, and the appearance quality and the internal quality of the product are improved.
In this embodiment, the included angle between the central line of the outlets of the plurality of ingates 1 and the central line of the inlet of the corresponding cavity is 70°～85°Preferably 85°(ii) a By changing the pouring direction, the problems of material shortage and insufficient feeding capacity in the casting process are solved.
In this embodiment, the ratio of the gate thickness of the ingate 1 to the thickness of the casting formed at the connection position of the corresponding cavity is 2.8: 4 to 3: 4, preferably 2.8: 4; the ratio of the gate thickness to the gate width of the ingate 1 is 2.8: 20-2.8: 35, preferably 2.8: 20; if for CG125 left crankcase, current runner thickness is 3.2mm, the runner thickness of the casting system of this embodiment can be reduced to 2.8mm, and the reduction of the runner thickness of ingate 1 is favorable to reducing the sucking area of ingate 1, is favorable to improving the slag resistance, reduces the risk of short-cut, can alleviate the damage to the casting when separating from the casting, and guarantees the appearance quality of the product.
In the embodiment, the runner device further comprises a cross runner 6 communicated with the ingate 1, and as shown in the figure, the cross runner 6 is approximately V-shaped; the reasonable layout of the pouring channel of the casting system is facilitated.
In the embodiment, a plurality of ingates 1 are arranged at intervals on both sides of the V shape of the horizontal pouring channel 6, and the inlet of the horizontal pouring channel 6 is positioned at the bottom of the V shape; as shown in the figure, one side of the V-shaped cross pouring gate 6 extends to the side close to the crankshaft hole 4, 4 ingates 1 are distributed, the other side wall extends to the side of the pedal hole 3, and 3 ingates 1 are distributed; the pouring liquid entering the horizontal pouring gate 6 through the outer pouring gate 8 and the straight pouring gate 7 is stably distributed to two sides in the horizontal pouring gate 6, and then enters the cavity through the 7 inner pouring gates 1, so that the reasonable layout of pouring channels of a pouring system is facilitated, and the steady flow and the flow guiding effect on the pouring liquid are facilitated.
In this embodiment, the cross sections of the horizontal pouring channel 6 and the ingate 1 are circular, trapezoidal or rectangular, preferably trapezoidal with arc treatment; the inner walls of the communication part of the horizontal pouring channel 6 and the inner pouring channel 1 and the communication part of the inner pouring channel 1 and the cavity are subjected to smooth arc transition treatment; is favorable for exerting the effect of stabilizing the flow of the pouring liquid.
In this embodiment, the casting system further comprises a plurality of exhaust passages 5; as shown in the figure, the plurality of exhaust channels 5 are correspondingly arranged on the other side of the cavity relative to the plurality of ingates 1; is beneficial to sequential filling of aluminum water and air exhaust of the cavity.
In this embodiment, as shown in the figure, each of the plurality of exhaust passages 5 is provided with an expansion chamber to facilitate slag deposition.
In the embodiment, the insert at the pedal hole is made into a sliding structure, so that the filling amount of aluminum water and a feeding channel are increased, and the shrinkage hole at the threaded hole is solved.
The present embodiment also provides a crankcase body cast according to the crankcase body casting system as described above.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (8)
1. The utility model provides a bent axle box casting system which characterized in that: comprises a plurality of ingates and a cavity communicated with the ingates; at least one ingate communicated with the cavity is arranged near the position where the shrinkage cavity is easy to generate during the casting of the crankcase body; an inner pouring gate communicated with the cavity is arranged at the casting position of the pedal hole of the crankcase body; the included angle between the central line of the plurality of ingate outlets and the central line of the corresponding cavity inlet is 70°～85°(ii) a The ratio of the thickness of the sprue gate of the ingate to the thickness of a crankcase casting formed at the connecting part of the corresponding cavity is 2.8: 4-3: 4.
2. The crankcase casting system of claim 1, wherein: the ratio of the gate thickness to the gate width of the ingate is 2.8: 20-2.8: 35.
3. The crankcase casting system of claim 1, wherein: the runner is communicated with the plurality of ingates and is approximately V-shaped.
4. The crankcase casting system of claim 3, wherein: a plurality of ingates are arranged at intervals on both sides of the V-shaped cross gate, and the inlet of the cross gate is positioned at the bottom of the V-shaped cross gate; one side of the V-shaped cross pouring gate extends to the side close to the crankshaft hole, and the other side wall extends to the pedal hole side.
5. The crankcase casting system of claim 3, wherein: the cross sections of the transverse pouring channel and the inner pouring channel are circular, trapezoidal or rectangular; and the inner walls of the communication position of the cross pouring channel and the inner pouring channel and the communication position of the inner pouring channel and the cavity are subjected to smooth arc transition treatment.
6. The crankcase casting system of claim 1, wherein: the casting system further includes a plurality of exhaust passages; the exhaust channels are correspondingly arranged on the other side of the cavity relative to the ingates.
7. The crankcase casting system of claim 6, wherein: the plurality of exhaust passages are each provided with an expansion chamber.
8. The utility model provides a bent axle box which characterized in that: the crankcase body is cast according to the crankcase body casting system of any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920990009.XU CN210730910U (en) | 2019-06-27 | 2019-06-27 | Crankcase casting system and crankcase |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920990009.XU CN210730910U (en) | 2019-06-27 | 2019-06-27 | Crankcase casting system and crankcase |
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| Publication Number | Publication Date |
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| CN210730910U true CN210730910U (en) | 2020-06-12 |
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| CN201920990009.XU Active CN210730910U (en) | 2019-06-27 | 2019-06-27 | Crankcase casting system and crankcase |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113523193A (en) * | 2021-07-07 | 2021-10-22 | 上柴动力海安有限公司 | Lightweight crankcase casting pouring system and casting process thereof |
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2019
- 2019-06-27 CN CN201920990009.XU patent/CN210730910U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113523193A (en) * | 2021-07-07 | 2021-10-22 | 上柴动力海安有限公司 | Lightweight crankcase casting pouring system and casting process thereof |
| CN113523193B (en) * | 2021-07-07 | 2023-04-11 | 上柴动力海安有限公司 | Lightweight crankcase casting pouring system and casting process thereof |
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