CN104384451A - Gating system for U-shaped screw pressurization diffuser casting - Google Patents
Gating system for U-shaped screw pressurization diffuser casting Download PDFInfo
- Publication number
- CN104384451A CN104384451A CN201410621760.4A CN201410621760A CN104384451A CN 104384451 A CN104384451 A CN 104384451A CN 201410621760 A CN201410621760 A CN 201410621760A CN 104384451 A CN104384451 A CN 104384451A
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- CN
- China
- Prior art keywords
- dead head
- diffuser
- gating
- straight
- wax part
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
Abstract
The invention discloses a gating system for a U-shaped screw pressurization diffuser casting. The gating system comprises an edge gating riser, a direct gating riser, a main runner and a pouring cup, wherein the bottoms of the edge gating riser and the direct gating riser are connected with a diffuser wax part; the top surfaces of the edge gating riser and the direct gating riser are flush to each other; the tops of the edge gating riser and the direct gating riser are respectively connected with the bottom surface of a rectangular main runner which is kept flat; and the top surface of the main runner is connected with the pouring cup. According to the gating system, the casting defects such as sinkholes, burnt-on sand and metal spikes are prevented; the product yield is increased; the production cost is reduced; the gating system is suitable for impellers of a plurality of complicated three-dimensional spiral surrounding wheels which are complicated in internal structure and shape, large in wall margin, high in demands on manufacturing accuracy, especially, liquid high-pressure conveying equipment spare parts with relatively large wall margins of closed water conservancy and chemical engineering.
Description
Technical field
The present invention relates to a kind of running gate system of foundry goods, especially a kind of running gate system for supercharging diffuser foundry goods, belongs to casting technology field.
Background technology
U-shaped spiral boosting diffuser is the core component of U-shaped multiple coil super-pressure pump, material is austenite cast stainless steel, U-shaped blade constitutes the core technology of this product, the shape of blade is that the U-shaped circular spiral of many thick 2mm is around setting, as shown in Figure 1, the U-shaped circular spiral that centre is many wall thickness 2mm exports around blade and wall thickness 60mm and wall thickness 19mmU type outer shroud constitutes the airtight water channel of U-shaped spiral ring.Because the structure of product is special, complex-shaped, the general production adopting the mode of precision-investment casting to carry out diffuser foundry goods at present.As shown in Figure 2, foundry goods is with shoulder hole, and wherein the end face of the side that shoulder hole aperture is maximum is the initial end face of blade with large plane for the structure of diffuser foundry goods.Precision-investment casting generally comprises and makes wax part, group number, is stained with slurry, shell processed, dewaxing, roasting, cast, broken shell and cleanup step, and the structure of diffuser wax part is identical with diffuser cast product structure.
In group number step, first kept flat by diffuser wax part, its Leaf initiating terminal faces up, and afterwards running gate system is arranged on the top of wax part, completes combination assembling.Diffuser body spiral surrounding water channel blade 2mm thickness, the thickness difference of the 19mm of blade and inner and outer ring, in castings production process, uses the running gate system of suitable foundry goods just to seem particularly important.If Design of Runner System is improper, if pouring temperature is low in casting pouring process, there is the defect such as cold shut, misrun in water channel blade; If pouring temperature is high, foundry goods root of blade easily produces shrinkage cavity, occurs leaking shell and the defect such as metal prong or broken teeth.When poring rate is fast, there is breakage, fracture, leak shell, the shrinkage cavity of foundry goods root of blade in foundry goods blade; Blade misrun when poring rate is slow.Therefore the product percent of pass of foundry goods is low, and production cost is high.
Summary of the invention
The object of the present invention is to provide a kind of running gate system for U-shaped spiral boosting diffuser foundry goods, prevent foundry goods from occurring the casting flaws such as shrinkage cavity, scab, metal prong, improve product percent of pass, reduce production cost.
Problem of the present invention realizes with following technical proposals:
For the running gate system of U-shaped spiral boosting diffuser foundry goods, it comprises side dead head, straight dead head, main running channel and cup, described straight dead head is arranged in the large plane of diffuser wax part, straight dead head is a cylinder, the cross section of described cylinder is one section of circular arc, described circular arc by two sections with all concentric camber line of diffuser wax part be connected the isometric rectilinear(-al) be parallel to each other of two sections of two sections of camber line homonymies, described side dead head is arranged on the outer rim of diffuser wax part, described side dead head is made up of the cone with the inclination that edge is constantly close to the inside of height decline outer ledge of the top circle ring column corresponding to straight dead head profile and bottom, the shape of cross section of described cone is corresponding to the shape of cross section of straight dead head.
Side dead head is all connected with diffuser wax part with the bottom of straight dead head, the either flush of side dead head and straight dead head, side dead head is connected with the bottom surface of the rectangular-shaped main running channel kept flat respectively with the top of straight dead head, and the end face of described main running channel connects cup.
The above-mentioned running gate system for U-shaped spiral boosting diffuser foundry goods, described side dead head and straight dead head all arrange two, and two side dead head radial symmetric are arranged on the outer rim of diffuser wax part; Two straight dead head radial symmetric are arranged on the large end face of diffuser wax part, and the line of centres of the line of centres of two side dead heads and two straight dead heads coincides.
The above-mentioned running gate system for U-shaped spiral boosting diffuser foundry goods, main running channel arranges two, article two, be connected with straight dead head with the adjacent side dead head of diffuser wax part shoulder hole homonymy respectively bottom main running channel, article two, the top of main running channel overlaps the flat board that a center line and main running channel center line are positioned at same vertical plane, described cup is vertically set on dull and stereotyped upper surface, and the two ends in described slab length direction arrange the flat sheet die be connected with main running channel bottom respectively.
The above-mentioned running gate system for U-shaped spiral boosting diffuser foundry goods, the radius of curvature of the inner side of described straight dead head is less than the maximum diameter of hole of shoulder hole; Distance between the camber line in outside and blade is greater than the thickness of four times of blades.
The above-mentioned running gate system for U-shaped spiral boosting diffuser foundry goods, the inner side radius of curvature on the top of described side dead head is less than the outer edge radius of diffuser wax part; The inner side camber line of the bottom of side dead head overlaps with the outer rim of diffuser wax part; Distance between the outside camber line of the bottom of side dead head (2) and inner side camber line is greater than the thickness of blade.
Beneficial effect of the present invention is:
The present invention is applicable to that internal structure, complex-shaped, Wall-Thickness Difference are large, the accuracy of manufacture requires high, the liquid high pressure large discharge conveying equipment parts such as enclosed water conservancy, chemical industry that the impeller, particularly Wall-Thickness Difference of complicated three-dimensional many spiral surroundings wheels are larger.
Use the invention solves foundry goods Shrinkage Problem, the convenient flow direction controlling molten steel of Position Design of side dead head and straight dead head, make molten steel and plan vertical direction inflow casting mold tangential from outer wall along annulus respectively when pouring into a mould, the molten steel of both direction converges and blade place mutually, reduce the direct impact of molten steel to blade, prevent blade damaged and overheated, avoid the intersection of blade and inside and outside annulus to occur the casting flaws such as shrinkage cavity, scab, leakage shell, metal prong.
Distance between the outside camber line of side dead head and inner side camber line is greater than the thickness of blade, prevents blade and the shrinkage cavity of outer rim joint portion, avoids the high temperature impact when casting pouring and makes blade place leak shell, improve the qualification rate of foundry goods.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is the structural representation of diffuser vane;
Fig. 2 is the structural representation of U-shaped spiral boosting diffuser foundry goods;
Fig. 3 is isometric views of the present invention;
Fig. 4 is front view of the present invention;
Fig. 5 is the A direction view of Fig. 4.
In figure, each list of reference numerals is: 1, diffuser wax part, 2, side dead head, 3, straight dead head, 4, main running channel, 5, cup, 6, flat sheet die.
Detailed description of the invention
For a running gate system for U-shaped spiral boosting diffuser foundry goods, described running gate system is arranged on the top of diffuser wax part 1, and the structure of running gate system is referring to Fig. 3-Fig. 5, and it comprises side dead head 2, straight dead head 3, main running channel 4, cup 5 and flat sheet die 6.Described side dead head 2, straight dead head 3 and flat sheet die 6 all arrange two, and described main running channel 4 arranges two.The line of centres of two side dead heads, two straight dead heads, two main running channels 4 and two flat sheet die 6 is all positioned at same vertical plane with the radial direction of diffuser wax part 1.
Two side dead head radial symmetric are arranged on the outer rim of diffuser wax part; Two straight dead head radial symmetric are arranged in the large plane of diffuser wax part, and the line of centres of the line of centres of two side dead heads and two straight dead heads coincides.Side dead head 2 is all connected with diffuser wax part with the bottom of straight dead head 3, and the either flush of side dead head 2 and straight dead head 3, is located in the same horizontal plane.Described main running channel 4 is a rectangular structure, and two main running channel horizontal positioned, the length direction of main running channel parallels with the line of centres of two side dead heads.Be connected with straight dead head with the adjacent side dead head of diffuser wax part shoulder hole homonymy respectively bottom main running channel, article two, leave space between main running channel, the space of two main running channels is set up the flat board of a rectangular structure, center line and the main running channel center line of the length direction of described flat board are positioned at same vertical plane, dull and stereotyped two ends are overlapped on the end face of main running channel, and dull and stereotyped length is less than the distance outside two main running channels.Described cup 5 is vertically set on dull and stereotyped upper surface, and the two ends in described slab length direction arrange flat sheet die 6 respectively, and the bottom of described flat sheet die 6 is connected with main running channel.
Described straight dead head 3 is a cylinder, and the shape of cross section of described cylinder is one section of circular arc, described circular arc by two sections with all concentric camber line of diffuser wax part be connected the isometric rectilinear(-al) be parallel to each other of two sections of two sections of camber line homonymies.The radius being wherein positioned at the camber line of inner side is less than the maximum diameter of hole of diffuser wax part shoulder hole; Horizontal range between camber line in outside and blade initiating terminal is greater than the thickness of four times of blades.
Described side dead head 2 is made up of the circle ring column of the circle ring column on top and the cone of bottom, and the cross section of described circle ring column is corresponding with straight dead head profile, and wherein the radius of curvature of inner side is less than the outer edge radius of diffuser wax part.The shape of cross section of described cone is corresponding with the shape of cross section of the circle ring column on top, wherein the camber line of inner side overlaps with the outer rim of diffuser wax part, outside camber line along with height decline camber line to the inside draw close, camber line wherein and the minimum range between the camber line of inner side are greater than the thickness of a blade, form the inclined plane of ecto-entad.
Assembly technology of the present invention is:
1) first by diffuser wax part 1 horizontal positioned, blade initiating terminal is faced up.2) bonding side dead head 2: use bonding wax, by bonding with the outer rim symmetry of diffuser for the inner side camber line of dead head bottom, two sides cone, ensures that the end face of side dead head keeps level, two side dead heads and diffuser wax part Central Symmetry simultaneously.3) bonding straight dead head 3: according to the position of side dead head, use bonding wax, bonding straight dead head, ensure that straight dead head is greater than technological requirement and the status requirement of four times of vane thicknesses from the distance of diffuser vane initiating terminal, ensure the end face maintenance level of straight dead head, the end face of straight dead head and the end face of side dead head are positioned at same level simultaneously.4) bonding wax is used to bond main running channel 4, the band flat board of cup 5 and flat sheet die 6 successively.
Claims (5)
1. for the running gate system of U-shaped spiral boosting diffuser foundry goods, it is characterized in that, it comprises side dead head (2), straight dead head (3), main running channel (4) and cup (5),
Described straight dead head (3) is arranged in the large plane of diffuser wax part, straight dead head (3) is a cylinder, the cross section of described cylinder is one section of circular arc, described circular arc by two sections with all concentric camber line of diffuser wax part be connected the isometric rectilinear(-al) be parallel to each other of two sections of two sections of camber line homonymies, described side dead head (2) is arranged on the outer rim of diffuser wax part, described side dead head (2) is made up of the cone with the inclination that edge is constantly close to the inside of height decline outer ledge of the top circle ring column corresponding to straight dead head profile and bottom, the shape of cross section of described cone is corresponding to the shape of cross section of straight dead head (3),
Side dead head (2) is all connected with diffuser wax part with the bottom of straight dead head (3), the either flush of side dead head (2) and straight dead head (3), side dead head (2) is connected with the bottom surface of the rectangular-shaped main running channel (4) kept flat respectively with the top of straight dead head (3), and the end face of described main running channel (4) connects cup (5).
2. the running gate system for U-shaped spiral boosting diffuser foundry goods according to claim 1, is characterized in that, described side dead head (2) and straight dead head (3) all arrange two, and two side dead head radial symmetric are arranged on the outer rim of diffuser wax part; Two straight dead head radial symmetric are arranged on the large end face of diffuser wax part, and the line of centres of the line of centres of two side dead heads and two straight dead heads coincides.
3. the running gate system for U-shaped spiral boosting diffuser foundry goods according to claim 2, it is characterized in that, main running channel (4) arranges two, article two, be connected with straight dead head with the adjacent side dead head of diffuser wax part shoulder hole homonymy respectively bottom main running channel, article two, the top of main running channel overlaps the flat board that a center line and main running channel center line are positioned at same vertical plane, described cup (5) is vertically set on dull and stereotyped upper surface, and the two ends in described slab length direction arrange the flat sheet die (6) be connected with main running channel bottom respectively.
4. the running gate system for U-shaped spiral boosting diffuser foundry goods according to claim 1, is characterized in that, the radius of curvature of the inner side of described straight dead head (3) is less than the maximum diameter of hole of shoulder hole; Distance between the camber line in outside and blade is greater than the thickness of four times of blades.
5. the running gate system for U-shaped spiral boosting diffuser foundry goods according to claim 1, is characterized in that, the inner side radius of curvature on the top of described side dead head (2) is less than the outer edge radius of diffuser wax part; The inner side camber line of the bottom of side dead head (2) overlaps with the outer rim of diffuser wax part; Distance between the outside camber line of the bottom of side dead head (2) and inner side camber line is greater than the thickness of blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410621760.4A CN104384451B (en) | 2014-11-07 | Running gate system for U-shaped spiral boosting bubbler foundry goods |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410621760.4A CN104384451B (en) | 2014-11-07 | Running gate system for U-shaped spiral boosting bubbler foundry goods |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104384451A true CN104384451A (en) | 2015-03-04 |
| CN104384451B CN104384451B (en) | 2017-01-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104722708A (en) * | 2015-03-30 | 2015-06-24 | 共享铸钢有限公司 | Modeling method and sand mold structure of sector-shaped end cover type casting for large-size mill |
| CN108044053A (en) * | 2017-12-04 | 2018-05-18 | 东方电气集团东方汽轮机有限公司 | A kind of narrow flow road double shrouded wheel fine casting method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1461893A (en) * | 2002-05-31 | 2003-12-17 | 乐金电子(天津)电器有限公司 | Diffuser structure of turbocompressor |
| CN1605408A (en) * | 2003-08-28 | 2005-04-13 | 联合工艺公司 | Investment casting |
| CN101583800A (en) * | 2007-02-14 | 2009-11-18 | 博格华纳公司 | Compressor housing |
| CN102211143A (en) * | 2011-05-21 | 2011-10-12 | 王吉龙 | Copper-aluminum alloy bottom pouring type pouring system structure |
| WO2013169572A1 (en) * | 2012-05-09 | 2013-11-14 | Scuderi Group, Inc. | Outwardly-opening valve with cast-in diffuser |
| CN103658542A (en) * | 2013-12-19 | 2014-03-26 | 贵州黎阳航空动力有限公司 | Precision casting gating system |
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1461893A (en) * | 2002-05-31 | 2003-12-17 | 乐金电子(天津)电器有限公司 | Diffuser structure of turbocompressor |
| CN1605408A (en) * | 2003-08-28 | 2005-04-13 | 联合工艺公司 | Investment casting |
| CN101583800A (en) * | 2007-02-14 | 2009-11-18 | 博格华纳公司 | Compressor housing |
| CN102211143A (en) * | 2011-05-21 | 2011-10-12 | 王吉龙 | Copper-aluminum alloy bottom pouring type pouring system structure |
| WO2013169572A1 (en) * | 2012-05-09 | 2013-11-14 | Scuderi Group, Inc. | Outwardly-opening valve with cast-in diffuser |
| CN103658542A (en) * | 2013-12-19 | 2014-03-26 | 贵州黎阳航空动力有限公司 | Precision casting gating system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104722708A (en) * | 2015-03-30 | 2015-06-24 | 共享铸钢有限公司 | Modeling method and sand mold structure of sector-shaped end cover type casting for large-size mill |
| CN108044053A (en) * | 2017-12-04 | 2018-05-18 | 东方电气集团东方汽轮机有限公司 | A kind of narrow flow road double shrouded wheel fine casting method |
| CN108044053B (en) * | 2017-12-04 | 2019-07-26 | 东方电气集团东方汽轮机有限公司 | A kind of narrow flow road double shrouded wheel fine casting method |
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Address after: 071051 No. 311 Fujiang Street, Baoding City, Hebei Province Patentee after: Baoding Sail Precision Machinery Technology Co., Ltd. Address before: 071051 No. 311 Fujiang Street, Baoding City, Hebei Province Patentee before: BAODING FENGFAN PRECISION CASTING CO., LTD. |
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