CN106734950A - A kind of casting technique of hollow valve body steel-casting - Google Patents
A kind of casting technique of hollow valve body steel-casting Download PDFInfo
- Publication number
- CN106734950A CN106734950A CN201611081638.8A CN201611081638A CN106734950A CN 106734950 A CN106734950 A CN 106734950A CN 201611081638 A CN201611081638 A CN 201611081638A CN 106734950 A CN106734950 A CN 106734950A
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- China
- Prior art keywords
- valve body
- core
- casting
- main valve
- crab
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- B22C9/22—Moulds for peculiarly-shaped castings
-
- 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
- B22C9/088—Feeder heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
Abstract
The present invention relates to a kind of casting technique of hollow valve body steel-casting in casting technology field, mainly including following several respects：1）It is when moulding and pouring type that main valve body is axially vertically disposed；2）Setting open riser in the upper surface of main valve body is used for feeding main valve body, in the outer wall of main valve body, some subsidies connected with open riser are set, in the lower end periphery of main valve body, blind riser, some subregion chills of the corresponding main valve body wall periphery setting of blind riser, to prevent open riser feeding blind riser are set；3）The interior geat of running gate system is set in blind riser lower surface, pouring molten iron is directly flowed into casting die cavity from blind riser；4）Anti- core floatation bone is set in the core of main valve body, the anti-core floatation bone is included along the axially arranged crab and secondary arbor of core, the lower end of the crab is vertically provided with mark core arbor, it is fixedly connected when mark core arbor is with crab moulding, and marks the two ends of core arbor and stretch to sandbox wall and be fixedly connected with sandbox wall.
Description
Technical field
The present invention relates to casting technology field, more particularly to a kind of casting technique of hollow valve body steel-casting.
Background technology hollow valve body casting is the critical component of vapor wheel unit, its structure as shown in figure 1, including one
Zhi Tongguan mouthfuls 2 that is laterally provided with several radially opposite sides or unilateral bypass of main valve body 1 and main valve body 1.This hollow valve body casting
It is operated under high pressure-temperature adverse circumstances, casting material is special, its knot very high to mechanical performance and interior tissue requirement
Structure Requirements of Nondestructive Testing is strict, it is desirable to can not have the casting flaws such as slag inclusion, shrinkage porosite, crackle, and especially some key positions are UT inspections
Survey 0 grade of area.
Because casting structure key area is more, inner chamber is narrow and small, and it is only 310mm that internal diameter is minimum, and casting difficulty is big.Prior art
In, casting technique takes casting method as shown in Figure 2, places casting sidewards during casting, according to founding method and feeding ladder
Degree sets open riser 3 in the arc top position of main valve body 1, and subregion chill 5 is set at the arc bottom of main valve body 1, makes open riser 3 in main valve
The arc bottom feeding end region of body 1 carries out subregion, running gate system 5 is set, using the ingate 8 of a diameter of 140mm.In core
Interior setting arbor 4, wherein backbone is welded using the square steel of 120mm × 120mm, and secondary arbor is using a diameter of 100mm's
Round steel is made.This founding method Shortcomings in actual production, are mainly reflected in, and the crucial UT of casting detects that 0 grade of area holds
It is also easy to produce shrinkage porosite, dreg defect problem.Simultaneously as casting is sidewards, the strong point of arbor 4 only has located lateral, without perpendicular
Nogata, due to being surrounded for a long time by high-temperature molten steel, is susceptible to deformation, causes arbor to soften to positioning, arbor 4 in cast,
Core is difficult to fix, the problems such as there is core floatation.Ultimately result in casting quality and do not meet technical requirements.
The content of the invention
The above mentioned problem that the present invention exists for hollow valve body class cast casting technique in the prior art, there is provided a kind of hollow
The casting technique of valve body steel-casting, by improving the design of casting setting direction, rising head method to set up and arbor structure, with
Casting defect is reduced, casting quality is improved.
The object of the present invention is achieved like this, a kind of casting technique of hollow valve body steel-casting, the hollow core valve
Body steel-casting include axially through main valve body, the branch for being laterally provided with several radially opposite sides or unilateral bypass of the main valve body
Siphunculus mouthful, it is characterised in that, the hollow valve body steel-casting uses following casting technique：
1）Using the axially vertically disposed moulding of the main valve body by casting and pouring type；
2）Setting open riser in the upper surface of main valve body is used for feeding main valve body, and the outside dimension of open riser is more than main valve body
Outside dimension, some subsidies connected with open riser are set in the outer wall of main valve body logical to get through the downward feeding of open riser
Road, setting blind riser in the lower end periphery of main valve body carries out feeding, the position that the subsidy stretches downwards to the lower end of main valve body
With high and do not connect mutually, the corresponding main valve body wall periphery of the blind riser sets some points for the height and position upward with blind riser
Area's chill, to prevent open riser feeding blind riser；
3）The interior geat of running gate system is set in blind riser lower surface, pouring molten iron is directly flowed into casting die cavity from blind riser,
To prevent potting syrup impact mold cavity；
4）Anti- core floatation bone is set in the core of main valve body, and the anti-core floatation bone is included along the axially arranged crab of core,
Secondary arbor is respectively provided with along the radial direction of Zhi Tongguan mouthfuls of bypass on the crab, vertical being provided with the lower end of the crab is made
For fixing the mark core arbor of core during type, it is fixedly connected when the mark core arbor is with crab moulding, and mark core arbor
Two ends stretch to sandbox wall and are fixedly connected with sandbox wall.
Casting technique of the invention, by casting main body using the moulding and pouring type being vertically arranged, by improving
Feeder Design and arbor are designed, and effectively solve the problems, such as that casting UT detections require 0 grade of shrinkage porosite in area, slag inclusion, and effectively solve
Certainly fuse core floatation problem.In actual production process, by the implementation of the inventive method, casting defect is effectively reduced, it is ensured that
Casting quality.
To ensure uniform feeding of the open riser to casting, the subsidy is uniformly arranged four along the outer wall of main valve body.
To ensure uniform feeding of the blind riser to bottom casting, the blind riser is symmetrical arranged two along main valve body lower end periphery
It is individual, and blind riser allows the position of spending siphunculus mouthful.
Further, the ingate sets several, and is uniformly arranged on blind riser bottom.
For ease of realizing the fixed installation of core during moulding, the crab and secondary arbor be square steel be welded and fixed and
Into, it is embedded in core and the upper end of crab is higher than core upper end, the lower end of crab is concordant with core lower end；The mark
Core arbor is welded with nut, the mark before back-up sand during moulding also by square steel is made in the centre of mark core arbor length direction
Core arbor is fixedly installed in sandbox, and nut sets up, and the center of nut is just corresponded to the center of core, so
Core is played afterwards, makes the crab of core just to the nut location at mark core arbor center, wear a length in the crab of direction from core
Screw rod simultaneously makes screw rod lower end be connected firmly with nut, and screw rod upper end stretches out crab top and crab and screw rod are welded into solid
It is fixed.
Brief description of the drawings
Fig. 1 is the structural representation of hollow valve body steel-casting.
Fig. 2 is the casting technique schematic diagram of hollow valve body steel-casting in the prior art.
Fig. 3 is the foundary methods drawing of heart valve body steel-casting in space of the invention.
Fig. 4 is the structural representation of anti-core floatation bone.
Fig. 5 is the axial section of Fig. 4.
Wherein, 1 main valve body；2 siphunculus mouthful；3 open risers；4 arbors；5 subregion chills；Running gate system in 6；7 subsidies；8 is dark
Rising head；901 crabs；902 secondary arbors；903 mark core arbors；904 screw rods；905 mark core nuts.
Specific embodiment
It is the casting technique of hollow valve body steel-casting of the invention, hollow valve body steel-casting as shown in Fig. 3-Fig. 5
Structure as shown in figure 1, including axially through main valve body 1, main valve body 1 is laterally provided with several radially opposite sides or unilateral bypass
Zhi Tongguan mouthfuls 2, hollow valve body steel-casting use following casting technique：
1）Using the axially vertically disposed moulding of the main valve body 1 by casting and pouring type；
2）Setting open riser 3 in the upper surface of main valve body 1 is used for feeding main valve body 1, and the outside dimension of open riser 3 is more than master
The outside dimension of valve body 1, sets some subsidies 7 connected with open riser 3 downward to get through open riser 3 in the outer wall of main valve body 1
Feeding channel, main valve body 1 lower end periphery set blind riser 8 feeding, and blind riser 8 are carried out to the lower end of main valve body 1
Two are symmetrical arranged along main valve body lower end periphery, meanwhile, should allow the position of spending siphunculus mouthful when blind riser 8 is set；To prevent mending
Contracting blind riser is subsidized, the position that subsidy 7 the stretches downwards height and position upward with blind riser 8 is same high and does not connect mutually, secretly emits
Mouth 8 corresponding main valve body 1 wall periphery sets some subregion chills 5, to prevent the feeding blind riser 8 of open riser 3；To ensure open riser
3 pairs of uniform feeding of casting, subsidy 7 is uniformly arranged four along the outer wall of main valve body；
3）The interior geat of several running gate systems 6 is uniformly arranged in the lower surface of blind riser 8, pouring molten iron is directly passed through from ingate
Blind riser 8 flows into casting die cavity, to prevent potting syrup impact mold cavity；
4）Anti- core floatation bone is set in the core of main valve body 1, and the anti-core floatation bone is included along the axially arranged crab of core
901, secondary arbor 902 is respectively provided with along the radial direction of Zhi Tongguan mouthfuls of bypass on crab 901, the lower end of crab 901 is vertical
For fixing the mark core arbor 903 of core when being provided with moulding, it is fixedly connected when mark core arbor 903 is with 901 moulding of crab, and
The two ends of mark core arbor 903 stretch to sandbox wall and are fixedly connected with sandbox wall；Crab of the invention 901 and secondary arbor 902
Be square steel and be welded and fixed and form, be embedded in core and crab 901 upper end higher than core upper end, crab 901
Lower end is concordant with core lower end；Mark core arbor 903 of the invention is also adopted by square steel and is made, in the length direction of mark core arbor 903
Centre is welded with mark heart nut 905, and marking core arbor 903 before back-up sand during moulding is fixedly installed in sandbox, mark core nut 905
Set up, and the center of mark core nut 905 is just corresponded to the center of core, then play core, make the main core of core
Bone 901 is just to the mark core nut location at the center of mark core arbor 903, then wears a long bolt in direction crab 901 from core
904 and the lower end of screw rod 904 and bar core nut 905 is set to spin firmly, the upper end of screw rod 904 is stretched out above crab 901 and by main core
Bone 901 is welded and fixed with screw rod 904, to complete the fixation of core.
Casting technique of the invention, by casting main body using the moulding and pouring type being vertically arranged, by improving
Feeder Design and arbor are designed, and effectively solve the problems, such as that casting UT detections require 0 grade of shrinkage porosite in area, slag inclusion, and effectively solve
Certainly fuse core floatation problem.In actual production process, by the implementation of the inventive method, casting defect is effectively reduced, it is ensured that
Casting quality.
Claims (5)
1. a kind of casting technique of hollow valve body steel-casting, the hollow valve body steel-casting include axially through main valve
Body, Zhi Tongguan mouthfuls that is laterally provided with several radially opposite sides or unilateral bypass of the main valve body, it is characterised in that, it is described hollow
Valve body steel-casting uses following casting technique：
1）Using the axially vertically disposed moulding of the main valve body by casting and pouring type；
2）Setting open riser in the upper surface of main valve body is used for feeding main valve body, and the outside dimension of open riser is more than main valve body
Outside dimension, some subsidies connected with open riser are set in the outer wall of main valve body logical to get through the downward feeding of open riser
Road, setting blind riser in the lower end periphery of main valve body carries out feeding, the position that the subsidy stretches downwards to the lower end of main valve body
With high and do not connect mutually, the corresponding main valve body wall periphery of the blind riser sets some points for the height and position upward with blind riser
Area's chill, to prevent open riser feeding blind riser；
3）The interior geat of running gate system is set in blind riser lower surface, pouring molten iron is directly flowed into casting die cavity from blind riser；
4）Anti- core floatation bone is set in the core of main valve body, and the anti-core floatation bone is included along the axially arranged crab of core,
Secondary arbor is respectively provided with along the radial direction of Zhi Tongguan mouthfuls of bypass on the crab, vertical being provided with the lower end of the crab is made
For fixing the mark core arbor of core during type, it is fixedly connected when the mark core arbor is with crab moulding, and mark core arbor
Two ends stretch to sandbox wall and are fixedly connected with sandbox wall.
2. the casting technique of hollow valve body steel-casting according to claim 1, it is characterised in that the subsidy is along master
The outer wall of valve body is uniformly arranged four.
3. the casting technique of hollow valve body steel-casting according to claim 1, it is characterised in that the blind riser edge
Main valve body lower end periphery is symmetrical arranged two, and blind riser allows the position of spending siphunculus mouthful.
4. the casting technique of hollow valve body steel-casting according to claim 1, it is characterised in that the ingate sets
Several are put, and is uniformly arranged on blind riser bottom.
5. the casting technique of hollow valve body steel-casting according to claim 1, it is characterised in that the crab and
Secondary arbor is square steel and is welded and fixed and forms, be embedded in core and crab upper end higher than core upper end, crab
Lower end is concordant with core lower end；The mark core arbor is welded and fixed also by square steel is made in the centre of mark core arbor length direction
There is nut, the mark core arbor is fixedly installed in sandbox before back-up sand during moulding, and nut sets up, and makes the center of nut
The center of core is just corresponded to, core is then played, makes the crab of core just to the nut location at mark core arbor center, from sand
A long bolt is worn on core in the crab of direction and screw rod lower end is connected firmly with nut, crab top is stretched out in screw rod upper end
And crab is welded and fixed with screw rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611081638.8A CN106734950A (en) | 2016-11-30 | 2016-11-30 | A kind of casting technique of hollow valve body steel-casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611081638.8A CN106734950A (en) | 2016-11-30 | 2016-11-30 | A kind of casting technique of hollow valve body steel-casting |
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| Publication Number | Publication Date |
|---|---|
| CN106734950A true CN106734950A (en) | 2017-05-31 |
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ID=58901396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611081638.8A Pending CN106734950A (en) | 2016-11-30 | 2016-11-30 | A kind of casting technique of hollow valve body steel-casting |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109175272A (en) * | 2018-11-14 | 2019-01-11 | 安徽应流集团霍山铸造有限公司 | A kind of bend pipe class sand casting sandbox and its sand core |
| CN113000794A (en) * | 2021-02-26 | 2021-06-22 | 共享装备股份有限公司 | Psammitolite shape frock of preapring for an unfavorable turn of events |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6234647A (en) * | 1985-08-06 | 1987-02-14 | Kitazawa Valve:Kk | Method for shell mold casting of core for casting |
| CN102161077A (en) * | 2011-04-09 | 2011-08-24 | 江苏金石铸锻有限公司 | Valve body casting method of expansion valve |
| CN203330350U (en) * | 2013-06-08 | 2013-12-11 | 昌邑中铸铸业有限公司 | Novel clamp body casting device |
| CN103433434A (en) * | 2013-09-02 | 2013-12-11 | 山东墨龙石油机械股份有限公司 | Method for casting valve body of flat gate valve |
| CN103506580A (en) * | 2013-10-30 | 2014-01-15 | 宜昌船舶柴油机有限公司 | Casting method for large thin-wall valve body steel casting |
| CN103878322A (en) * | 2014-03-27 | 2014-06-25 | 南车戚墅堰机车车辆工艺研究所有限公司 | Casting method for metro vehicle traction center steel casting |
| CN105382203A (en) * | 2015-10-29 | 2016-03-09 | 共享铸钢有限公司 | Novel casting method for steam turbine valve shell casting |
-
2016
- 2016-11-30 CN CN201611081638.8A patent/CN106734950A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6234647A (en) * | 1985-08-06 | 1987-02-14 | Kitazawa Valve:Kk | Method for shell mold casting of core for casting |
| CN102161077A (en) * | 2011-04-09 | 2011-08-24 | 江苏金石铸锻有限公司 | Valve body casting method of expansion valve |
| CN203330350U (en) * | 2013-06-08 | 2013-12-11 | 昌邑中铸铸业有限公司 | Novel clamp body casting device |
| CN103433434A (en) * | 2013-09-02 | 2013-12-11 | 山东墨龙石油机械股份有限公司 | Method for casting valve body of flat gate valve |
| CN103506580A (en) * | 2013-10-30 | 2014-01-15 | 宜昌船舶柴油机有限公司 | Casting method for large thin-wall valve body steel casting |
| CN103878322A (en) * | 2014-03-27 | 2014-06-25 | 南车戚墅堰机车车辆工艺研究所有限公司 | Casting method for metro vehicle traction center steel casting |
| CN105382203A (en) * | 2015-10-29 | 2016-03-09 | 共享铸钢有限公司 | Novel casting method for steam turbine valve shell casting |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109175272A (en) * | 2018-11-14 | 2019-01-11 | 安徽应流集团霍山铸造有限公司 | A kind of bend pipe class sand casting sandbox and its sand core |
| CN113000794A (en) * | 2021-02-26 | 2021-06-22 | 共享装备股份有限公司 | Psammitolite shape frock of preapring for an unfavorable turn of events |
| CN113000794B (en) * | 2021-02-26 | 2023-03-03 | 共享装备股份有限公司 | Psammitolite shape frock of preapring for an unfavorable turn of events |
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Application publication date: 20170531 |