CN104889332A - Pouring system of upper crown steel casting piece of thin-wall conical water turbine - Google Patents
Pouring system of upper crown steel casting piece of thin-wall conical water turbine Download PDFInfo
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- CN104889332A CN104889332A CN201510285719.9A CN201510285719A CN104889332A CN 104889332 A CN104889332 A CN 104889332A CN 201510285719 A CN201510285719 A CN 201510285719A CN 104889332 A CN104889332 A CN 104889332A
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Abstract
The invention relates to a pouring system of an upper crown steel casting piece of a thin-wall conical water turbine. The system comprises a sprue cup, a sprue in a vertical direction, and a slow flow cross gate in a horizontal direction, wherein two branches of first-grade shunt gates are symmetrically arranged at the tail end of the slow flow cross gate along the two sides of a molding cavity; two branches of second-grade shunt gates are symmetrically arranged at the tail end of each first-grade shunt gate along the periphery of the bottom side of the molding cavity; the tail ends of the second-grade shunt gates are respectively connected with cross gates; the cross gates comprise a cross gate 1 horizontally arranged at the bottom of the molding cavity in the radial direction, and a cross gate 2 vertically connected with the outer end of the cross gate 1; the inner end, near the radial direction, of the cross gate 1 is vertically connected with elliptic ingates; all the elliptic ingates are connected to form an integrated annular ingate; the integrated annular ingate is communicated with the bottom of a molding cavity of the steel casting piece; circular ingates are vertically connected to the cross gates near the two ends; and the circular ingates vertically upwards extend to the lower side of the thickest place of the middle part of the molding cavity of the casting, and are communicated with the molding cavity.
Description
Technical field
The present invention relates to casting technology field, particularly a kind of running gate system of thin-wall conical hydraulic turbine crown steel-casting.
Background technology
Our company is the rotary wheel of water turbine crown foundry goods that certain water power manufacturer manufactures, as shown in Figure 1, and substance 15300kg, top maximum gauge 3440mm, bottom minimum diameter 500mm, height 1800mm, bottom minimum wall thickness (MINI W.) 30mm, 70 ° are about to the tapering of top profile bottom foundry goods, and foundry goods thickness is positioned at the middle part of short transverse, all regions of this foundry goods are the requirement of UT2 level, and quality requirement is very high, especially flow-passing surface region needs to weld blade, has not allowed the defect such as slag inclusion and pore.Therefore, running gate system must ensure in cast cavity filling process without sand washing, can reduce the problems such as the refluence of molten steel, turbulent flow, volume gas to greatest extent, can reduce Slag inclusion enters die cavity or can ensure that Slag inclusion floats to rising head smoothly, and guarantee foundry goods is without the defect such as slag inclusion and pore.
Existing running gate system is the complete ceramic running gate system of injection method in the middle of adopting, and namely ingate is positioned at the mid portion of foundry goods, and running gate system comprises cup, sprue, unhurried current cross gate, cross gate and ingate.Cross gate is unitary circular structure, ingate directly by cross gate extraction channel die cavity, the collection slag ability of cross gate.During actual cast, cast molten steel amount is large, the influent stream speed of ingate is uneven, average influent stream speed 0.65m/s, but have the influent stream speed of part ingate only to have about 0.3m/s, the influent stream speed of some ingate is then up to about 1m/s, and too high influent stream speed causes the sand mold around ingate to wash away seriously, simultaneously because ingate influent stream velocity deviation is large, easily produce turbulent phenomenon.Refluence phenomenon can be there is lower than the casting portion of ingate height during cast, easily cause volume gas and slag problem.The foundry goods flow-passing surface of actual production and upper surface all find slag inclusion and pore class defect when detecting.
Summary of the invention
The object of the invention is to provide a kind of thin-wall conical hydraulic turbine crown Gating System for Casting Steel for the deficiencies in the prior art, to solve sand washing in such steel-casting cast cavity filling process, refluence and volume gas problem, thus improve quality and the qualification rate of steel-casting.
The object of the present invention is achieved like this, a kind of running gate system of thin-wall conical hydraulic turbine crown steel-casting, big up and small down tapered of the die cavity of described steel-casting, and steel-casting minimum wall thickness (MINI W.) is positioned at the bottom side of die cavity, the most thick wall of steel-casting is positioned at the high middle part of cone, described running gate system comprises cup successively, the sprue of vertical direction, the unhurried current cross gate of horizontal direction, described unhurried current cross gate end branches into two strand of one level shunt running channel along die cavity bilateral symmetry, a per share level shunt running channel end is two strand of two level shunt running channel along periphery, die cavity bottom side symmetric part of matrix, the end of described two level shunt running channels connects cross gate respectively, described cross gate comprises the cross gate one and cross gate two connected vertically with cross gate one outer end that arrange along cavity bottom radial level, described cross gate one is vertically connected with oval ingate near radial inner end, each described oblong ingate connects an integral annular ingate, described integral annular ingate is communicated with steel-casting cavity bottom, described cross gate two is vertically connected with circular ingate respectively near two ends place, described circular ingate extends to the downside in foundry goods die cavity interior thickness thickness vertically upward and is communicated with die cavity.
The running gate system of thin-wall conical hydraulic turbine crown steel-casting of the present invention, molten steel is after sprue realizes certain deceleration to unhurried current cross gate, being divided into two is divided into two after entering a level shunt running channel respectively again enters two level shunt running channels respectively, carry out respectively cross gate one from two level shunt running channels again, then the molten steel flowing through cross gate one is split into two strands, the oval ingate of one stock-traders' know-how is pooled to integral annular ingate and enters die cavity from thin-walled cavity bottom, another burst of steel flow is split into two stocks again to cross gate two and does not enter the thickness thickness of circular ingate upwards in the middle part of die cavity and enter in die cavity and carry out filling type cast.In running gate system of the present invention, molten steel is through the cushioning effect of two-stage shunting running channel, the flowing kinetic energy of further reduction molten steel, thus reduce the flow velocity entering ingate molten steel, avoid the slag floated in cross gate to mix and brought into ingate by high velocity liquid stream, and produce splash and wash away sand mold when avoiding molten steel to enter die cavity, when type is filled in cast, molten steel is respectively from wall thickness thinnest part and Liang Ge position, middle wall thickness thickness influent stream bottom foundry goods, the temperature of effective raising rising head, ensure that the thermograde of foundry goods is conducive to consecutive solidification, simultaneously, reduce the molten steel influent stream amount in integral annular ingate and the thinnest region of wall thickness, bottom, reduce this region molten steel washing away sand mold.
For ease of the molten iron in purification running channel, the end of described cross gate one radially inner side is provided with slag trap, and the two ends of described cross gate two are also provided with slag trap; Described slag trap adopts refractory material to make.In this structure, at the cross gate end near ingate position, slag trap is set, unhurried current cross gate is washed away at first for collecting, one level shunt running channel, first strand of molten steel of two level shunt running channels and cross gate, avoids the field trash in running gate system to enter die cavity by oval ingate, circular ingate and integral annular ingate.
For reducing cast folder matter further, each running channel of described running gate system adopts ceramic material pipe to make.
For accurately controlling the filling velocity that each ingate molten steel enters die cavity further, and effectively prevent filling shaped steel water and flow backwards, roll up gas, the actual internal area of described sprue is S1, the actual internal area sum of a described level shunt running channel is S2, the actual internal area sum of described two level shunt running channels is S3, the flow area sum of described cross gate one is S4, the flow area sum of described oval ingate is S5, the actual internal area of described circular ingate is respectively S6, S1:S2:S3:S4:S5:S6=1:1.6:3.5:3.1:3.1:3.1.
For optimizing the present invention further, the influent stream speed of described oval ingate and circular ingate inner metal liquid is 0.45 ~ 0.5m/s.
As a further improvement on the present invention, the internal diameter of described circular ingate is 100mm, and the diameter of section of described oval ingate and cross gate coupling part is 120mm.
Accompanying drawing explanation
Fig. 1 is the structural representation of thin-wall conical hydraulic turbine crown steel-casting of the present invention.
Fig. 2 is the injection system structure schematic diagram of thin-wall conical hydraulic turbine crown steel-casting of the present invention.
Fig. 3 is the cast schematic diagram of thin-wall conical hydraulic turbine crown steel-casting of the present invention.
Wherein, 1 steel-casting; 2 sprues; 3 slow water cross gate; 4 slag traps; 5 cross gates two; 6 one level shunt running channels; 7 two level shunt running channels; 8 cross gates one; 9 oval ingates; 10 circular ingates; 11 integral annular ingates; 12 cups.
Detailed description of the invention
If Fig. 1 is the thin-wall conical hydraulic turbine crown steel-casting adopting running gate system of the present invention, Fig. 2 and the running gate system that Figure 3 shows that thin-wall conical hydraulic turbine crown steel-casting of the present invention, big up and small down tapered of the die cavity of this steel-casting, and steel-casting minimum wall thickness (MINI W.) is positioned at the bottom side of die cavity, the most thick wall of steel-casting is positioned at the high middle part of cone, running gate system of the present invention comprises cup 12 successively, the sprue 2 of vertical direction, the unhurried current cross gate 3 of horizontal direction, unhurried current cross gate 3 end branches into two strand of one level shunt running channel 6 along die cavity bilateral symmetry, per share level shunt running channel 6 end is two strand of two level shunt running channel 7 along periphery, die cavity bottom side symmetric part of matrix, the end that two level shunts are watered connects cross gate respectively, cross gate of the present invention comprises the cross gate 1 and cross gate two 5 connected vertically with cross gate 1 outer end that arrange along cavity bottom radial level, cross gate 1 is vertically connected with oval ingate 9 near radial inner end, each oblong ingate 9 connects an integral annular ingate 11, integral annular ingate 11 is communicated with steel-casting cavity bottom, cross gate 25 is vertically connected with circular ingate 10 respectively near two ends place, circular ingate 10 extends to the downside in foundry goods die cavity interior thickness thickness vertically upward and is communicated with die cavity.
For ease of the molten iron in purification running channel, the end of cross gate 1 radially inner side is provided with slag trap 4, and the two ends of cross gate 25 are also provided with slag trap 5; This slag trap 5 adopts refractory material to make.In this structure, at the cross gate end near ingate position, slag trap is set, unhurried current cross gate 3 is washed away at first for collecting, one level shunt running channel 6, first strand of molten steel of two level shunt running channels 7 and cross gate, avoids the field trash in running gate system to enter die cavity by oval ingate 9, circular ingate 10 and integral annular ingate 11.
For reducing cast folder matter further, each running channel of running gate system adopts ceramic material pipe to make.
For accurately controlling the filling velocity that each ingate molten steel enters die cavity further, and effectively prevent filling shaped steel water and flow backwards, roll up gas, the actual internal area of described sprue is S1, the actual internal area sum of one level shunt running channel 6 is S2, the actual internal area sum of two level shunt running channels 7 is S3, the flow area sum of cross gate 1 is S4, the flow area sum of oval ingate 9 is S5, the actual internal area of circular ingate 10 is respectively S6, S1:S2:S3:S4:S5:S6=1:1.6:3.5:3.1:3.1:3.1; Further, the internal diameter of circular ingate is 100mm, and the diameter of section of described oval ingate and cross gate coupling part is 120mm.In running gate system of the present invention, by the control of each running channel size of leading portion and structure, the influent stream speed that can realize the oval ingate 9 of molten iron and circular ingate 10 inner metal liquid is 0.45 ~ 0.5m/s.
The running gate system of thin-wall conical hydraulic turbine crown steel-casting of the present invention, during cast, molten steel is after sprue 2 realizes certain deceleration to unhurried current cross gate 3, being divided into two is divided into two after entering a level shunt running channel 7 respectively again enters two level shunt running channels 7 respectively, carry out respectively cross gate 1 from two level shunt running channels 7 again, then the molten steel flowing through cross gate 1 is split into two strands, the oval ingate 9 of one stock-traders' know-how is pooled to integral annular ingate 11 and enters die cavity from thin-walled cavity bottom, another burst of steel flow is split into two stocks again to cross gate 25 and does not enter the thickness thickness of circular ingate 10 upwards in the middle part of die cavity and enter in die cavity and carry out filling type cast.In running gate system of the present invention, molten steel is through the cushioning effect of two-stage shunting running channel, the flowing kinetic energy of further reduction molten steel, thus reduce the flow velocity entering ingate molten steel, avoid the slag floated in cross gate to mix and brought into ingate by high velocity liquid stream, and produce splash and wash away sand mold when avoiding molten steel to enter die cavity, when type is filled in cast, molten steel is respectively from wall thickness thinnest part and Liang Ge position, middle wall thickness thickness influent stream bottom foundry goods, the temperature of effective raising rising head, ensure that the thermograde of foundry goods is conducive to consecutive solidification, simultaneously, reduce the molten steel influent stream amount in integral annular ingate and the thinnest region of wall thickness, bottom, reduce this region molten steel washing away sand mold.
Claims (6)
1. the running gate system of a thin-wall conical hydraulic turbine crown steel-casting, it is characterized in that, big up and small down tapered of the die cavity of described steel-casting, and steel-casting minimum wall thickness (MINI W.) is positioned at the bottom side of die cavity, the most thick wall of steel-casting is positioned at the high middle part of cone, described running gate system comprises cup successively, the sprue of vertical direction, the unhurried current cross gate of horizontal direction, described unhurried current cross gate end branches into two strand of one level shunt running channel along die cavity bilateral symmetry, a per share level shunt running channel end is two strand of two level shunt running channel along periphery, die cavity bottom side symmetric part of matrix, the end of described two level shunt running channels connects cross gate respectively, described cross gate comprises the cross gate one and cross gate two connected vertically with cross gate one outer end that arrange along cavity bottom radial level, described cross gate one is vertically connected with oval ingate near radial inner end, each described oblong ingate connects an integral annular ingate, described integral annular ingate is communicated with steel-casting cavity bottom, described cross gate two is vertically connected with circular ingate respectively near two ends place, described circular ingate extends to the downside in foundry goods die cavity interior thickness thickness vertically upward and is communicated with die cavity.
2. the running gate system of thin-wall conical hydraulic turbine crown steel-casting according to claim 1, is characterized in that, the end of described cross gate one radially inner side is provided with slag trap, and the two ends of described cross gate two are also provided with slag trap; Described slag trap adopts refractory material to make.
3. the running gate system of thin-wall conical hydraulic turbine crown steel-casting according to claim 2, is characterized in that, each running channel of described running gate system adopts ceramic material pipe to make.
4. the running gate system of thin-wall conical hydraulic turbine crown steel-casting according to claim 2, it is characterized in that, the actual internal area of described sprue is S1, the actual internal area sum of a described level shunt running channel is S2, the actual internal area sum of described two level shunt running channels is S3, the flow area sum of described cross gate one is S4, the flow area sum of described oval ingate is S5, the actual internal area of described circular ingate is respectively S6, S1:S2:S3:S4:S5:S6=1:1.6:3.5:3.1:3.1:3.1.
5. the running gate system of thin-wall conical hydraulic turbine crown steel-casting according to claim 2, is characterized in that, the influent stream speed of described oval ingate and circular ingate inner metal liquid is 0.45 ~ 0.5m/s.
6. the running gate system of thin-wall conical hydraulic turbine crown steel-casting according to claim 2, is characterized in that, the internal diameter of described circular ingate is 100mm, and the diameter of section of described oval ingate and cross gate coupling part is 120mm.
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| CN201510285719.9A CN104889332B (en) | 2015-05-29 | 2015-05-29 | A kind of running gate system of thin-wall conical hydraulic turbine crown steel-casting |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105562610A (en) * | 2016-01-19 | 2016-05-11 | 共享装备股份有限公司 | Casting all-ceramic pouring mechanism |
| CN107737878A (en) * | 2017-09-29 | 2018-02-27 | 中国航发北京航空材料研究院 | A kind of precision casting pouring system of thin-walled cone structure aluminium alloy castings |
| CN107803467A (en) * | 2017-10-31 | 2018-03-16 | 共享铸钢有限公司 | A kind of running gate system of large-scale valve casing class steel-casting |
| CN108941461A (en) * | 2018-08-24 | 2018-12-07 | 四川共享铸造有限公司 | A kind of running gate system preventing thin-walled annular casting deformation |
| CN109093074A (en) * | 2018-10-22 | 2018-12-28 | 天津宝信铸造股份有限公司 | Vehicle compressor cabinet and its homogeneous material manufacturing process |
| CN110434283A (en) * | 2019-07-30 | 2019-11-12 | 共享铸钢有限公司 | A kind of method that hydraulic turbine crown and outer ring casting are cast with case |
| CN110666106A (en) * | 2019-10-09 | 2020-01-10 | 安庆中船柴油机有限公司 | Pouring system and method for oil cylinder |
| CN111644572A (en) * | 2020-07-24 | 2020-09-11 | 湛江德利车辆部件有限公司 | Oil duct orifice plate casting gating system |
| CN113770312A (en) * | 2020-06-10 | 2021-12-10 | 合肥市瑞宏重型机械有限公司 | Hammer disc drainage casting system and casting process thereof |
| CN117620125A (en) * | 2024-01-25 | 2024-03-01 | 成都卫达机械制造有限公司 | Production process of bulb die casting |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105562610A (en) * | 2016-01-19 | 2016-05-11 | 共享装备股份有限公司 | Casting all-ceramic pouring mechanism |
| CN107737878A (en) * | 2017-09-29 | 2018-02-27 | 中国航发北京航空材料研究院 | A kind of precision casting pouring system of thin-walled cone structure aluminium alloy castings |
| CN107737878B (en) * | 2017-09-29 | 2019-06-04 | 中国航发北京航空材料研究院 | A kind of precision casting pouring system of thin-walled cone structure aluminium alloy castings |
| CN107803467B (en) * | 2017-10-31 | 2019-02-22 | 共享铸钢有限公司 | A kind of running gate system of large size valve casing class steel-casting |
| CN107803467A (en) * | 2017-10-31 | 2018-03-16 | 共享铸钢有限公司 | A kind of running gate system of large-scale valve casing class steel-casting |
| CN108941461A (en) * | 2018-08-24 | 2018-12-07 | 四川共享铸造有限公司 | A kind of running gate system preventing thin-walled annular casting deformation |
| CN108941461B (en) * | 2018-08-24 | 2020-04-28 | 四川共享铸造有限公司 | Pouring system for preventing deformation of thin-wall annular casting |
| CN109093074A (en) * | 2018-10-22 | 2018-12-28 | 天津宝信铸造股份有限公司 | Vehicle compressor cabinet and its homogeneous material manufacturing process |
| CN110434283A (en) * | 2019-07-30 | 2019-11-12 | 共享铸钢有限公司 | A kind of method that hydraulic turbine crown and outer ring casting are cast with case |
| CN110434283B (en) * | 2019-07-30 | 2020-11-13 | 共享铸钢有限公司 | Method for casting crown and outer ring casting of water turbine in same box |
| CN110666106A (en) * | 2019-10-09 | 2020-01-10 | 安庆中船柴油机有限公司 | Pouring system and method for oil cylinder |
| CN113770312A (en) * | 2020-06-10 | 2021-12-10 | 合肥市瑞宏重型机械有限公司 | Hammer disc drainage casting system and casting process thereof |
| CN111644572A (en) * | 2020-07-24 | 2020-09-11 | 湛江德利车辆部件有限公司 | Oil duct orifice plate casting gating system |
| CN117620125A (en) * | 2024-01-25 | 2024-03-01 | 成都卫达机械制造有限公司 | Production process of bulb die casting |
| CN117620125B (en) * | 2024-01-25 | 2024-04-05 | 成都卫达机械制造有限公司 | Production process of bulb die casting |
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