CN1167858A - Forgeable cast iron switch bed plate and mfg. method thereof - Google Patents
Forgeable cast iron switch bed plate and mfg. method thereof Download PDFInfo
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- CN1167858A CN1167858A CN 97111746 CN97111746A CN1167858A CN 1167858 A CN1167858 A CN 1167858A CN 97111746 CN97111746 CN 97111746 CN 97111746 A CN97111746 A CN 97111746A CN 1167858 A CN1167858 A CN 1167858A
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- cast iron
- bed plate
- switch bed
- supporting seat
- malleable cast
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Abstract
A switch bed plate of forgeable cast iron for railway includes a base, whose top surface is inclined and has convex supporting seats. Two supporting seats are a group and has an interval matched with the rail base. There is a T-shaped slot between supporting seat groups. Said supporting seat has a recess on the bottom.
Description
The present invention relates to a kind of railway switch bed plate and manufacture method thereof, particularly a kind of malleable cast iron switch bed plate and manufacture method thereof.
Existing switch bed plate mostly is assembly welding moulding after steel plate rolling or the steel plate slicing.Welded type backing plate manufacturing procedure is more, complex process, and mass-production process does not subtract, so the work efficiency difficulty has a very significant increase, and cost is higher; It is rolling that rolling backing plate is mainly used in common plate at present, difficult because of promoted by structural limitations.Also have carbon steel block cast backing plate and ductile iron backing plate in addition, its medium carbon steel block cast backing plate is better in mechanical properties, but relatively poor because of the casting character of carbon steel, causes the difficult control of surface quality, shape, size; And the ductile iron backing plate easily produces black brittleness, easily produces fracture at the cold district backing plate, and composition is wayward, after the spheroidising, and the smallclothes long decaying spheroidisation that easily the produces duration of pouring.
The objective of the invention is to provide a kind of manufacture method of malleable cast iron switch bed plate, it can increase the globality of backing plate; A kind of malleable cast iron switch bed plate also is provided simultaneously.
The object of the present invention is achieved like this:
The method of making above-mentioned switch bed plate may further comprise the steps:
A. moulding adopts manual sand mold and mechanical sand mold to carry out moulding.
B. pour into a mould with malleable cast iron and pour into a mould, its composition percentage by weight is: carbon 2.5～2.8%, silicon 1.2～1.5%, manganese 0.4～0.6%, phosphorus≤0.12%, sulphur≤0.15%, all the other are iron, pouring temperature is controlled between 1350～1450 ℃, adopt the method cast of inclined casting, gradient is consistent with the gradient of casting backing plate.
C. heat treatment is adopted the conventional annealing process curve in the annealing kiln annealing.
Carry out pressure correction and check after the heat treatment.
A kind of malleable cast iron switch bed plate, comprise a base, the upper surface of base is an inclined-plane, which is provided with the supporting seat of projection, per two supporting seats are one group, divide the left and right sides that is located at base, and its spacing and the flange of rail are complementary, form a T-slot between every group of supporting seat, the bottom of described supporting seat is provided with groove.
The present invention is owing to adopted malleable cast iron to make switch bed plate, therefore its composition is easy to control, this backing plate has good low-temperature flexibility, its intensity height, castability is reliable and stable, mechanical performance and metallographic structure all reach instructions for use, surface quality is better, can reach the regulation of the Ra25 of GB6060.1, and shape is regular, each size meets the demands, owing to do not process fully or seldom processing, the overall performance of backing plate is improved, and because the casting character of malleable cast iron is better, can adapt to different backing plate forms, be easy to promote; Simplify operation thereby can raise labour productivity significantly, reduced cost.
Concrete structure of the present invention and implementation method are provided by following accompanying drawing and most preferred embodiment thereof.
Fig. 1 is the front view of a kind of malleable cast iron switch bed plate of proposition according to the present invention;
Fig. 2 is the vertical view of a kind of malleable cast iron switch bed plate of proposition according to the present invention;
Fig. 3 is along the sectional view of B-B line among Fig. 2;
Fig. 4 is along the sectional view of A-A line among Fig. 2.
Below in conjunction with accompanying drawing most preferred embodiment of the present invention is further described.
As shown in Figures 1 to 4, a kind of malleable cast iron switch bed plate 1, comprise a base 2, the upper surface of described base 2 is an inclined-plane, which is provided with the supporting seat 3 of four projectioies, and per two supporting seats are one group, divide the left and right sides that is located at base, the its spacing and the flange of rail are complementary, and form a T-slot between every group of supporting seat, and the bottom of described supporting seat is provided with groove 4.
The malleable cast iron switch bed plate that the present invention proposes, has the chemical analysis shown in the table 1 (percentage by weight), this composition system adopts silicon in the high-carbon, Bi, Al are compound inoculated, can suitably improve carbon equivalent like this, reduce as cast condition and shrink and liquid amount of contraction,, improve the inherent quality of backing plate to reduce the formation of crackle and shrinkage porosite.
Table 1
| Malleable cast iron switch bed plate chemical analysis percentage by weight (%) | |||||
| ?????C | ?????Si | ?????Mn | ????S | ????P | ???Fe |
| ??2.5～2.8 | ??1.2～1.5 | ??0.4～0.6 | ??≤0.15 | ??≤0.12 | All the other |
The running gate system of cast malleable cast iron switch bed plate is: cast gate adopts multiple tracks to disperse ingate, in order to the cooling velocity of balanced foundry goods integral body, solidifies helping; Adopted high ladder type runner gate to come the thermal center place at feeding ingate place in addition; The heavy wall district that the junction of supporting seat and base is formed carries out " going light " and handles, and makes the bottom of backing plate supporting seat form groove 4, makes the wall thickness even transition.
The method of making above-mentioned switch bed plate may further comprise the steps:
A. moulding adopts manual sand mold and mechanical sand mold to carry out moulding
B. pour into a mould with malleable cast iron and pour into a mould, its composition percentage by weight is: carbon 2.5～2.8%, silicon 1.2～1.5%, manganese 0.4～0.6%, phosphorus≤0.12%, sulphur≤0.15%, all the other are iron, pouring temperature is controlled between 1380～1410 ℃, poring rate is 9 seconds, adopt the method for inclined casting, gradient is consistent with the gradient of casting backing plate.
C. heat treatment is adopted the conventional annealing process curve in the annealing kiln annealing.
Carry out pressure correction and check after the heat treatment.The chemical analysis percentage by weight of thus obtained malleable cast iron switch bed plate is: carbon 2.5～2.8%, silicon 1.2～1.5%, and manganese 0.4～0.6%, phosphorus≤0.12%, sulphur≤0.15%, all the other are iron, its mechanical performance is: tensile strength sigma
b〉=350MPa, elongation per unit length δ 〉=10% reaches as high as 21%.
Claims (2)
1. a malleable cast iron switch bed plate manufacture method may further comprise the steps:
A. moulding adopts manual sand mold and mechanical sand mold to carry out moulding;
B. pour into a mould with malleable cast iron and pour into a mould, its composition percentage by weight is: carbon 2.5～2.8%, silicon 1.2～1.5%, manganese 0.4～0.6%, phosphorus≤0.12%, sulphur≤0.15%, all the other are iron, pouring temperature is controlled between 1350～1450 ℃, adopt the method for inclined casting, gradient is consistent with the gradient of casting backing plate;
C. heat treatment is adopted the conventional annealing process curve in the annealing kiln annealing;
Carry out pressure correction and check after the heat treatment.
2. railway switch bed plate of making according to the described method of claim 1, it is characterized in that: described malleable cast iron switch bed plate, comprise a base, the upper surface of base is an inclined-plane, which is provided with the supporting seat of projection, per two supporting seats are one group, and its spacing and the flange of rail are complementary, form a T-slot between every group of supporting seat, the bottom of described supporting seat is provided with groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97111746 CN1167858A (en) | 1997-05-07 | 1997-05-07 | Forgeable cast iron switch bed plate and mfg. method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97111746 CN1167858A (en) | 1997-05-07 | 1997-05-07 | Forgeable cast iron switch bed plate and mfg. method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1167858A true CN1167858A (en) | 1997-12-17 |
Family
ID=5171841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97111746 Pending CN1167858A (en) | 1997-05-07 | 1997-05-07 | Forgeable cast iron switch bed plate and mfg. method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN1167858A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101823193B (en) * | 2009-03-03 | 2011-07-20 | 江苏新康华机械有限公司 | Machining technology of slide plate special for passengers |
| CN101823131B (en) * | 2009-03-03 | 2011-09-07 | 江苏新康华机械有限公司 | Processing method of integral-casting spherical iron base plate for high-speed railway |
| CN102191425A (en) * | 2011-05-26 | 2011-09-21 | 阳山县联合铸锻有限公司 | Malleable wear-resistant alloy cast iron |
| CN102248118A (en) * | 2011-04-14 | 2011-11-23 | 大连大高阀门有限公司 | Die and process for forging high-speed railway substrate |
| CN102259162A (en) * | 2010-11-03 | 2011-11-30 | 鞍钢集团矿业公司 | Moulding method in casting technology of railway plate |
| CN106223132A (en) * | 2016-08-10 | 2016-12-14 | 安徽禹王铸业有限公司 | High-intensity anti-cracking track pad |
| CN106427549A (en) * | 2015-08-13 | 2017-02-22 | 温州三联锻造有限公司 | Retaining ring of automobile damper and forging method of retaining ring |
-
1997
- 1997-05-07 CN CN 97111746 patent/CN1167858A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101823193B (en) * | 2009-03-03 | 2011-07-20 | 江苏新康华机械有限公司 | Machining technology of slide plate special for passengers |
| CN101823131B (en) * | 2009-03-03 | 2011-09-07 | 江苏新康华机械有限公司 | Processing method of integral-casting spherical iron base plate for high-speed railway |
| CN102259162A (en) * | 2010-11-03 | 2011-11-30 | 鞍钢集团矿业公司 | Moulding method in casting technology of railway plate |
| CN102248118A (en) * | 2011-04-14 | 2011-11-23 | 大连大高阀门有限公司 | Die and process for forging high-speed railway substrate |
| CN102248118B (en) * | 2011-04-14 | 2014-05-14 | 大连大高阀门股份有限公司 | Die and process for forging high-speed railway substrate |
| CN102191425A (en) * | 2011-05-26 | 2011-09-21 | 阳山县联合铸锻有限公司 | Malleable wear-resistant alloy cast iron |
| CN106427549A (en) * | 2015-08-13 | 2017-02-22 | 温州三联锻造有限公司 | Retaining ring of automobile damper and forging method of retaining ring |
| CN106223132A (en) * | 2016-08-10 | 2016-12-14 | 安徽禹王铸业有限公司 | High-intensity anti-cracking track pad |
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