CN109482814A - For the curb girder casting method on railway passenger train framework composition - Google Patents
For the curb girder casting method on railway passenger train framework composition Download PDFInfo
- Publication number
- CN109482814A CN109482814A CN201811547686.0A CN201811547686A CN109482814A CN 109482814 A CN109482814 A CN 109482814A CN 201811547686 A CN201811547686 A CN 201811547686A CN 109482814 A CN109482814 A CN 109482814A
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- Prior art keywords
- sand
- core
- curb girder
- casting method
- box
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- 238000005266 casting Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000000203 mixture Substances 0.000 title abstract description 7
- 239000004576 sand Substances 0.000 claims abstract description 47
- 244000035744 Hura crepitans Species 0.000 claims abstract description 18
- 239000003110 molding sand Substances 0.000 claims abstract description 18
- 239000002184 metal Substances 0.000 claims abstract description 7
- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 238000000465 moulding Methods 0.000 claims abstract description 7
- 239000011230 binding agent Substances 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000011347 resin Substances 0.000 claims abstract description 4
- 229920005989 resin Polymers 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 238000007689 inspection Methods 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 235000000396 iron Nutrition 0.000 claims description 6
- 239000002023 wood Substances 0.000 claims description 5
- 238000005336 cracking Methods 0.000 claims description 4
- 238000003384 imaging method Methods 0.000 claims 1
- 238000005476 soldering Methods 0.000 claims 1
- 238000003466 welding Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000008439 repair process Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 208000037656 Respiratory Sounds Diseases 0.000 abstract 2
- 238000001816 cooling Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
-
- 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
- B22C9/22—Moulds for peculiarly-shaped castings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The invention discloses a kind of curb girder casting methods on railway passenger train framework composition, comprising: step a, prepares molding sand and core sand using sand mixer；Step b, molding sand is poured into sky sandbox, then type core is fitted into sandbox and prepares curb girder sand mold using moulding machine；Step c, mould assembling and molten metal is injected from the cast gate on sand mold using running gate system and outer running gate system；And step d, unpack and curb girder after cooling is taken out and is detected from sandbox；Wherein, the molding sand is made of roughing sand, binder and water；The core sand is made of resin sand core and sawdust.The curb girder casting method is implemented to be easy, and is easy to grasp, and effect is obvious, preferably solves the problems, such as elongated cabinet class casting curb girder deformation, crackle and shrinkage porosite；It significantly reduces curb girder deformation to tune up, the workload of crackle, shrinkage porosite digging repair welding, hence it is evident that the workload for reducing arrangement improves economic benefit.
Description
Technical Field
The invention relates to the field of metal piece casting, in particular to a side beam casting method for a railway passenger car vehicle frame composition.
Background
Along with the rapid development of passenger train vehicle manufacturing, constantly improve passenger train vehicle framework performance requirement, the structure and the production mode of framework also require constantly to improve, improve manufacturing standard, passenger train framework adopts the welding mode mostly at present, there is certain safe risk in performance, mainly be that the welding position easily produces fatigue crack, influence performance and time limit, through carrying out technical analysis and simulation experiment to the framework structure, consider that the framework of cast joint structure is more reasonable, be about to framework curb girder adoption casting, the intermediate junction crossbeam adopts the high strength steel pipe, with the two assembly welding as an organic whole.
The casting is carried out according to the existing integral framework casting mode, the deformation is large, cracks and shrinkage porosity are common, the production difficulty is large, and the yield is low.
Therefore, it is highly desirable to provide a casting method that solves the problems of deformation, cracking and shrinkage porosity of the existing single-piece cast side sill, ensures the size, surface quality and internal quality of the cast, and achieves superior performance of the cast side sill.
Disclosure of Invention
The invention aims to provide a side beam casting method for a railway passenger car vehicle framework composition, which is easy to implement, easy to master and obvious in effect and better solves the problems of deformation, cracks and shrinkage porosity of side beams of long box castings; the workload of deformation adjustment, crack, shrinkage porosity, excavation, repair welding and repair of the side beam is greatly reduced, the workload of arrangement is obviously reduced, and the economic benefit is improved.
In order to achieve the above object, the present invention provides a method for casting a side sill for a frame assembly of a railway passenger car, comprising:
step a, preparing molding sand and core sand by using a sand mixer;
b, pouring the molding sand into an empty sand box, then filling the mold core into the sand box, and preparing a side beam sand mold by using a molding machine;
c, assembling the box and injecting molten metal from a pouring gate on the sand mold by using a pouring system and an external pouring system; and
d, opening the box, taking out the cooled side beams from the sand box and detecting;
wherein,
the molding sand consists of raw sand, a binder and water; the core sand consists of a resin sand core and wood chips.
Preferably, the core sand is heated and extruded through a die to form the core.
Preferably, the gating system in step c is an open gating system and the gating rate is: 8-12 m/min;
preferably, the outer gating system in step c is gated by means of a bridge.
Preferably, the detection in step d comprises radiographic filming.
Preferably, step d further comprises: and a riser and a chill are additionally arranged at the position on the sand mould corresponding to the position where the crack is found on the side beam through radiographic inspection shooting.
Preferably, step d further comprises: anti-cracking ribs are additionally arranged at the ingate and the round corners without the cold iron, and iron ore sand is placed between the cold irons and at the edges of the cold irons.
According to the technical scheme, firstly, a sand mixer is used for preparing molding sand and core sand, then the molding sand is poured into an empty sand box, the core is filled into the sand box, and a molding machine is used for preparing a side beam sand mold; then closing the box and injecting molten metal from a pouring gate on the sand mould by using a pouring system and an outer pouring system; and finally, opening the box, taking the cooled side beams out of the sand box and detecting. Meanwhile, wood chips are added into the core sand during preparation, so that the resistance of the sand mold and the sand core is reduced, and the problems of deformation, cracks and shrinkage porosity in the casting of the side beam used for the railway passenger car vehicle framework composition are solved.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of a method for casting a side sill for a railway car frame assembly in accordance with the present invention;
FIG. 2 is a top plan view of a cast blank for a method of casting side rails for a railway car frame assembly in accordance with the present invention;
FIG. 3 is a side view of a cast blank for a method of casting a side sill for a railway car frame assembly in accordance with the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
Referring to fig. 1, the present invention provides a method for casting a side sill for a frame assembly of a railway passenger car, comprising:
step a, preparing molding sand and core sand by using a sand mixer;
b, pouring the molding sand into an empty sand box, then filling the mold core into the sand box, and preparing a side beam sand mold by using a molding machine;
c, assembling the box and injecting molten metal from a pouring gate on the sand mold by using a pouring system and an external pouring system;
d, opening the box, taking out the cooled side beams from the sand box and detecting;
wherein the molding sand consists of raw sand, a binder and water; the core sand consists of a resin sand core and wood chips.
According to the technical scheme, firstly, a sand mixer is used for preparing molding sand and core sand, then the molding sand is poured into an empty sand box, the core is filled into the sand box, and a molding machine is used for preparing a side beam sand mold; then closing the box and injecting molten metal from a pouring gate on the sand mould by using a pouring system and an outer pouring system; and finally, opening the box, taking the cooled side beams out of the sand box and detecting. Meanwhile, wood chips are added into the core sand during preparation, so that the resistance of the sand mold and the sand core is reduced, and the problems of deformation, cracks and shrinkage porosity in the casting of the side beam used for the railway passenger car vehicle framework composition are solved. In order to make the surface of the product smooth after casting, reduce flash and enable molding sand to be better shaped in the molding process, the molding sand is formed by mixing raw sand, a binder and water according to a certain proportion, for example, the raw sand accounts for 80-90%, the binder accounts for 5-10% and the water accounts for 5-10%.
In order to make the core recycled after the production process, the core sand is preferably heated and extruded through a die to form the core. Thus, after the casting is finished, the damaged core can be crushed into powder, and the powder is used as a recycling raw material and heated by a mold to be a new core for reuse, so that the production cost is saved.
When the gating system performs gating, in order to reduce the temperature difference between the parts of the casting as much as possible, achieve solidification tending to be consistent, and simultaneously reduce stress and deformation, preferably, the gating system in step c is an open gating system and the gating speed is: 8-12 m/min;
likewise, in order to avoid the resistance of the gating system to the shrinkage of the casting and reduce the deformation of the casting, the external gating system in step c is preferably gated in a bridge-crossing manner.
In order to ensure the internal quality of the casting and enhance the control of the casting quality, the detection in step d preferably comprises radiographic filming.
In the radiographic inspection process, in order to timely modify the process according to the inspection result to improve the product quality, preferably, step d further includes: and a riser and a chill are additionally arranged at the position on the sand mould corresponding to the position where the crack is found on the side beam through radiographic inspection shooting. Thus, the feeding channel is locally added, the feeding is enhanced, and the compactness of the radiographic inspection part is ensured.
In addition, in order to further prevent cracks from occurring on the surface of the side sill casting, it is preferable that step d further includes: anti-cracking ribs are additionally arranged at the ingate and the round corners without the cold iron, and iron ore sand is placed between the cold irons and at the edges of the cold irons. Thus, a chilling transition area of the chilling block can be formed, and chilling cracks of the chilling block are effectively avoided.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (6)
1. A method of casting side sills for use in a railway car frame assembly, comprising:
step a, preparing molding sand and core sand by using a sand mixer;
b, pouring the molding sand into an empty sand box, then filling the mold core into the sand box, and preparing a side beam sand mold by using a molding machine;
c, assembling the box and injecting molten metal from a pouring gate on the sand mold by using a pouring system and an external pouring system; and
d, opening the box, taking out the cooled side beams from the sand box and detecting;
wherein,
the molding sand consists of raw sand, a binder and water; the core sand consists of a resin sand core and wood chips.
2. A side sill casting method as claimed in claim 1, wherein said core sand is heated and extruded through a die to make a core.
3. A side sill casting method as claimed in claim 1, wherein the gating system in step c is an open gating system and the gating rate is 8-12 m/min;
a side sill casting method as claimed in claim 1, wherein the outer gating system in step c is poured in a bridge-over manner.
4. A side sill casting method as claimed in claim 1, wherein said detecting in step d includes radiographic imaging.
5. A side sill casting method as claimed in claim 5, further comprising in said step d: and a riser and a chill are additionally arranged at the position, corresponding to the position where the crack is found on the side beam through the radiographic inspection shooting, of the sand mould.
6. A side sill casting method as claimed in claim 6, further comprising in said step d: anti-cracking ribs are additionally arranged at the ingate and the round corners where the cold iron is not placed, and soldering iron ore sand is placed between the cold irons and at the edges of the cold irons.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811547686.0A CN109482814A (en) | 2018-12-18 | 2018-12-18 | For the curb girder casting method on railway passenger train framework composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811547686.0A CN109482814A (en) | 2018-12-18 | 2018-12-18 | For the curb girder casting method on railway passenger train framework composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109482814A true CN109482814A (en) | 2019-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811547686.0A Pending CN109482814A (en) | 2018-12-18 | 2018-12-18 | For the curb girder casting method on railway passenger train framework composition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109482814A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114570877A (en) * | 2022-03-02 | 2022-06-03 | 安徽合力股份有限公司合肥铸锻厂 | Casting process of large agricultural machine cross beam |
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|---|---|---|---|---|
| CN101791677A (en) * | 2010-02-21 | 2010-08-04 | 济南中森机械制造有限公司 | Manufacturing method of overall cast beam |
| CN101920312A (en) * | 2010-08-21 | 2010-12-22 | 宜昌船舶柴油机有限公司 | Casting method and leveling tool for large multi-blade casting |
| CN104057025A (en) * | 2014-06-30 | 2014-09-24 | 薛铁山 | Casting technology for high-chromium iron double-suction impeller |
| CN104084538A (en) * | 2014-06-25 | 2014-10-08 | 芜湖国鼎机械制造有限公司 | Metal part casting method |
| CN104226909A (en) * | 2014-09-03 | 2014-12-24 | 鞍钢集团矿业公司 | Modeling core of connecting pin holes of front wall of bucket and bucket teeth and making and using methods |
| CN105499493A (en) * | 2015-12-27 | 2016-04-20 | 无锡市灵通铸造有限公司 | Casting technology for preventing shrinkage and porosity |
| CN107385282A (en) * | 2017-07-25 | 2017-11-24 | 烟台市中拓合金钢有限责任公司 | A kind of heat-resisting alloy steel thin-wall pipe sand casting process |
-
2018
- 2018-12-18 CN CN201811547686.0A patent/CN109482814A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101791677A (en) * | 2010-02-21 | 2010-08-04 | 济南中森机械制造有限公司 | Manufacturing method of overall cast beam |
| CN101920312A (en) * | 2010-08-21 | 2010-12-22 | 宜昌船舶柴油机有限公司 | Casting method and leveling tool for large multi-blade casting |
| CN104084538A (en) * | 2014-06-25 | 2014-10-08 | 芜湖国鼎机械制造有限公司 | Metal part casting method |
| CN104057025A (en) * | 2014-06-30 | 2014-09-24 | 薛铁山 | Casting technology for high-chromium iron double-suction impeller |
| CN104226909A (en) * | 2014-09-03 | 2014-12-24 | 鞍钢集团矿业公司 | Modeling core of connecting pin holes of front wall of bucket and bucket teeth and making and using methods |
| CN105499493A (en) * | 2015-12-27 | 2016-04-20 | 无锡市灵通铸造有限公司 | Casting technology for preventing shrinkage and porosity |
| CN107385282A (en) * | 2017-07-25 | 2017-11-24 | 烟台市中拓合金钢有限责任公司 | A kind of heat-resisting alloy steel thin-wall pipe sand casting process |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114570877A (en) * | 2022-03-02 | 2022-06-03 | 安徽合力股份有限公司合肥铸锻厂 | Casting process of large agricultural machine cross beam |
| CN114570877B (en) * | 2022-03-02 | 2023-12-22 | 安徽合力股份有限公司合肥铸锻厂 | Casting process of large-scale agricultural machinery cross beam |
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Application publication date: 20190319 |