CN202411342U - Double-riser pouring structure of piston - Google Patents
Double-riser pouring structure of piston Download PDFInfo
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- CN202411342U CN202411342U CN2011205594173U CN201120559417U CN202411342U CN 202411342 U CN202411342 U CN 202411342U CN 2011205594173 U CN2011205594173 U CN 2011205594173U CN 201120559417 U CN201120559417 U CN 201120559417U CN 202411342 U CN202411342 U CN 202411342U
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- rising head
- riser
- pair
- die cavity
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Abstract
The utility model relates to a double-riser pouring structure of a piston. The pouring structure comprises two risers (a main riser and an assistant riser) which are matched with each other. As the two risers are arranged, and the sizes and the positions of the two risers are designed reasonably, the effects of air discharging and feeding can be effectively improved, and the casting defect caused by a signal riser pouring structure of a piston skirt part can be made up, so that the piston skirt part is more compact, the organization is more uniform, the waste rate of pistons is reduced, and the machining performance and the using performance can be improved.
Description
Technical field
The utility model relates to the Feeder Design of piston casting structure, belongs to the casting for piston field.
Background technology
The main effect of piston is the gas pressure that bears in the cylinder, and this power is passed to connecting rod through piston pin, to promote crankshaft rotating.Top land is also formed the combustion chamber with cylinder head, cylinder wall jointly.The condition of work of piston is quite abominable, and at first, it is bearing very big mechanical load, also can produce huge reciprocating motion inertia force during high-speed motion, and this inertia force can reach the hundred times of piston weight even higher; Secondly, it is bearing higher thermic load, and top land directly periodically contacts with high-temperature fuel gas, and the maximum temperature of combustion gas can reach more than the 2000K, so the temperature of piston is also very high.Wearing and tearing were also very serious when simultaneously, piston was made high-speed motion.
For guaranteeing the good operation characteristic of engine, the alloy material performance is had following requirement: density is little, thermal coefficient of expansion is low, wearability is good, heat conductivity and processing characteristics are superior.For this reason, the present piston material that adopts of engine is an aluminium alloy.
The forming method of aluminium alloy mainly contains and forges and casting; Cast pistons intensity when high temperature descends less, low cost of manufacture, but foundry goods is in cooling and process of setting; Because the liquid state of alloy is shunk and the result of solidification shrinkage, the cavity appears in the place that foundry goods is in the end solidified.Volume is big and cavity that concentrate is called shrinkage cavity, and is tiny and cavity that disperse is called shrinkage porosite.Shrinkage cavity and shrinkage porosite all make the actual strength of foundry goods reduce, and this is because shrinkage cavity and shrinkage porosite have reduced the stressed net sectional area of foundry goods on the one hand, near shrinkage cavity and shrinkage porosite, can produce the stress concentration phenomenon on the other hand, thereby this part metals intensity is greatly weakened.The long-term production practical experience shows, adopts the way of riser feeding to prevent that foundry goods from producing shrinkage cavity and shrinkage porosite, is a kind of effective technological measure.The main effect of rising head is to store enough liquid alloys, and the body that foundry goods is taken place in cooling and process of setting shrinks and can constantly be replenished, thereby prevents in foundry goods, to occur shrinkage cavity and shrinkage porosite.In addition, rising head also have concurrently give vent to anger, effect such as scum silica frost.Therefore appropriate design is poured into a mould structure, and improving the casting for piston quality as much as possible is its subject matter that faces.
At present; When the Birmasil piston, adopt the cast structure of single rising head more, this structure is because the rising head position is lower; Cause the effect of exhaust and feeding not good enough; Can't remedy the piston skirt and defectives such as shrinkage cavity, shrinkage porosite occur, thereby cause piston skirt intensity lower, influence the processing and the serviceability of piston.
Summary of the invention
Based on the problem and shortage of above-mentioned existence, the utility model has designed a kind of pair of riser gating structure.
The technical scheme of the utility model is: this cast structure adopts the vertical parting face, has two rising heads, is respectively main rising head and secondary rising head.Wherein, main rising head is positioned at die cavity near oblique running channel one side, and its bottom is a little more than cavity bottom.This main rising head is formed by connecting through spherical crown on diameter different the first half cylinder and the latter half cylinder; Main rising head center line and die cavity center line keep certain distance; Main rising head top is higher than the die cavity top, and main rising head lower cylindrical body keeps certain gradient away from the wall and the vertical direction of die cavity.Secondary rising head is positioned at the side of die cavity away from oblique running channel, and its bottom maintains a certain distance with the cast structural base, and is suitable apart from the distance of cast structural base with piston boss.Secondary rising head is made up of diameter different the first half cylinder and the latter half cylinder, and two cylinders connect with spherical crown, and its upper cylinder center line and die cavity center line have certain distance.Secondary rising head top is higher than the die cavity top, and the shape of cross section of secondary rising head and die cavity coupling part is a rectangle.
Secondary rising head 1 cooperates main rising head 3, plays the effect that strengthens exhaust, feeding.The design of two rising heads has improved the feeding effect of piston cast, and particularly remarkable to the foundry goods skirt section, this design has simultaneously improved the casting quality, has prevented the generation of shrinkage porosite and shrinkage cavity effectively, has improved the performance of piston foundry goods.
Description of drawings
Fig. 1 is the front view of two riser gating structures of the utility model.
Fig. 2 is the vertical view of two riser gating structures of the utility model.
Among the figure, 1 is secondary rising head, and 2 is die cavity, and 3 is main rising head, and 4 is cup, and 5 is oblique running channel
The specific embodiment
In the utility model shown in Figure 1, the cast structure of piston comprises secondary rising head 1, die cavity 2, main rising head 3, cup 4 and oblique running channel 5.Cup 4 is cup-like containers that have tilt internal wall and can hold certain mass aluminium water, and it can form fluid-tight and keep certain fluid pressure, can reduce the air capacity that gets into die cavity like this.Tiltedly running channel 5 is the passages with constant slope, plays the effect of drainage.Main rising head 3 is open risers, and is top riser.This main rising head bottom is 10～80mm with the distance b of cast structural base.Main rising head is made up of diameter different the first half cylinder and the latter half cylinder, and two cylinders use radius to be R
2Spherical crown connect R
2Be 15～50mm.The diameter D that forms the first half cylinder of this main rising head
2Be 12～45mm, the difference in height k at main rising head end face and die cavity 2 tops is 6～81mm.Main rising head tilts near the inner surface of oblique running channel 5 to the inside, and oblique angle α is 3～15 °, and has arc transition to be connected with horizontal direction.What the mouth of main rising head 3 was held distance between center line die cavity 2 center lines is 50～100mm apart from d.Secondary rising head 1 is an open riser, and is top riser.Secondary rising head 1 is made up of diameter different the first half cylinder and the latter half cylinder, and two cylinders use radius to be R
1Spherical crown connect R
1Be 12～50mm.The diameter D that forms this pair rising head 1 the first half cylinder
1Be 12～45mm.The cross section of the coupling part between this pair rising head 1 and the die cavity 2 is a rectangle; Wherein the long f of rectangle is 20～45mm; Wide g is 2～15mm; And the length h of coupling part is 3～8mm, secondary rising head 1 bottom and die cavity 2 bottoms be 10mm～150mm apart from a, the center line of 1 mouthful of end of secondary rising head and the distance c of die cavity 2 center lines are 70mm～165mm.The volume of main rising head 3 is 1: 0.25～1: 0.75 with the ratio of the volume of secondary rising head 1.
Aluminium water gets into die cavity from cup 4 through oblique running channel 5 and clearance type running channel, and this clearance type running channel can make the foundry goods internal hydraulic pressure higher, has strengthened the compactness of foundry goods tissue.After aluminium water gets into die cavity, the exhaust simultaneously of major-minor rising head, exhaust capacity is strong.Along with the liquid level of aluminium water in die cavity raises gradually, the liquid level in the main rising head 3 also raises gradually, when the liquid level in the main rising head 3 rises to certain altitude; The no longer exhaust of main rising head 3; But because secondary rising head 1 position is higher, still exhaust effectively this moment has improved the exhaust effect of piston skirt.After aluminium water is filled with die cavity, continue filling aluminium water, let main rising head 3 and aluminium water in the secondary rising head 1 keep certain liquid level.During the foundry goods cooling, main rising head 3 and secondary rising head 1 feeding simultaneously, the position of main rising head 3 is lower, strengthens the feeding effect of piston crown effectively, and the position of secondary rising head 1 is higher, makes the piston skirt metal fine and close more.Through main rising head 3 and secondary rising head 1 are set, make that the feeding of piston top and the bottom is more even, the feeding effect significantly improves; Especially strengthened the feeding of piston skirt; Reduce shrinkage cavity and shrinkage porosite, reduced percent defective, improved the processing and the serviceability of piston.
Claims (10)
1. two riser gating structures of a piston; It is characterized in that: said pair of riser gating structure adopts the vertical parting face; Be provided with two rising heads in the both sides of die cavity (2): main rising head (3) and secondary rising head (1); Said secondary rising head is positioned at the side of said die cavity (2) away from oblique running channel (5), and said main rising head (3) is positioned at the side of said die cavity (2) near oblique running channel (5).
2. according to claim 1 pair of riser gating structure is characterized in that: said main rising head (3) is an open riser, and is top riser, and said main rising head (3) bottom is 10～80mm with the distance b of the bottom of said pair of riser gating structure.
3. according to claim 1 pair of riser gating structure is characterized in that: said main rising head (3) is made up of diameter different the first half cylinder and the latter half cylinder, and two cylinders use radius to be R
2Spherical crown connect R
2Be 15～50mm, form the diameter D of the first half cylinder of said main rising head (3)
2Be 12～45mm.
4. according to claim 1 pair of riser gating structure; It is characterized in that: the difference in height k at the end face of said main rising head (3) and said die cavity (2) top is 6～81mm, and what the mouth of said main rising head (3) was held center line and said die cavity (2) center line is 50～100mm apart from d.
5. according to claim 1 pair of riser gating structure is characterized in that: said main rising head (3) tilts near the inner surface of oblique running channel (5) to the inside, and oblique angle α is 3～15 °, and has arc transition to be connected with horizontal direction.
6. according to claim 1 pair of riser gating structure is characterized in that: said secondary rising head (1) is an open riser, and is top riser, the bottom of the bottom of said secondary rising head (1) and said die cavity (2) be 10mm～150mm apart from a.
7. according to claim 1 pair of riser gating structure is characterized in that: said secondary rising head (1) is made up of diameter different the first half cylinder and the latter half cylinder, and two cylinders use radius to be R
1Spherical crown connect R
1Be 12～50mm, form the diameter D of said secondary rising head (1) the first half cylinder
1Be 12～45mm.
8. according to claim 1 pair of riser gating structure is characterized in that: the center line of said secondary rising head (1) mouthful end and the distance c of said die cavity (2) center line are 70mm～165mm.
9. according to claim 1 pair of riser gating structure; It is characterized in that: the cross section of the coupling part between said secondary rising head (1) and the said die cavity (2) is a rectangle; Wherein the long f of rectangle is 20～45mm, and wide g is 2～15mm, and the length h of coupling part is 3～8mm.
10. according to claim 1 pair of riser gating structure is characterized in that: the ratio of the volume of the volume of said main rising head (3) and said secondary rising head (1) is 1: 0.25～1: 0.75.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205594173U CN202411342U (en) | 2011-12-29 | 2011-12-29 | Double-riser pouring structure of piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205594173U CN202411342U (en) | 2011-12-29 | 2011-12-29 | Double-riser pouring structure of piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202411342U true CN202411342U (en) | 2012-09-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205594173U Expired - Fee Related CN202411342U (en) | 2011-12-29 | 2011-12-29 | Double-riser pouring structure of piston |
Country Status (1)
| Country | Link |
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| CN (1) | CN202411342U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104624972A (en) * | 2013-11-14 | 2015-05-20 | 安徽省恒泰动力科技有限公司 | Filtering device for piston casting |
| WO2017185950A1 (en) * | 2016-04-28 | 2017-11-02 | 无锡蠡湖增压技术股份有限公司 | Fully automated dual casting-head equipment used for gravity casting machine |
| CN111390127A (en) * | 2020-04-22 | 2020-07-10 | 攀钢集团攀枝花钢铁研究院有限公司 | Die casting cap port shell mounting structure and die casting pouring method |
| CN114749616A (en) * | 2022-03-10 | 2022-07-15 | 上海大学 | Ingot mould for large-scale high-length-diameter ratio steel ingot and blank forming method |
| CN114799072A (en) * | 2022-05-20 | 2022-07-29 | 安徽省恒泰动力科技有限公司 | Feeding head mould of forming combustion chamber and feeding method thereof |
-
2011
- 2011-12-29 CN CN2011205594173U patent/CN202411342U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104624972A (en) * | 2013-11-14 | 2015-05-20 | 安徽省恒泰动力科技有限公司 | Filtering device for piston casting |
| WO2017185950A1 (en) * | 2016-04-28 | 2017-11-02 | 无锡蠡湖增压技术股份有限公司 | Fully automated dual casting-head equipment used for gravity casting machine |
| CN111390127A (en) * | 2020-04-22 | 2020-07-10 | 攀钢集团攀枝花钢铁研究院有限公司 | Die casting cap port shell mounting structure and die casting pouring method |
| CN114749616A (en) * | 2022-03-10 | 2022-07-15 | 上海大学 | Ingot mould for large-scale high-length-diameter ratio steel ingot and blank forming method |
| CN114799072A (en) * | 2022-05-20 | 2022-07-29 | 安徽省恒泰动力科技有限公司 | Feeding head mould of forming combustion chamber and feeding method thereof |
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Legal Events
| 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 |
Granted publication date: 20120905 Termination date: 20151229 |
|
| EXPY | Termination of patent right or utility model |