CN105665639A - Manufacturing method for movable device of cast steel curved support - Google Patents
Manufacturing method for movable device of cast steel curved support Download PDFInfo
- Publication number
- CN105665639A CN105665639A CN201610099449.7A CN201610099449A CN105665639A CN 105665639 A CN105665639 A CN 105665639A CN 201610099449 A CN201610099449 A CN 201610099449A CN 105665639 A CN105665639 A CN 105665639A
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- China
- Prior art keywords
- coating
- cast steel
- movable mounting
- sandbox
- support movable
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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
- B22C9/04—Use of lost patterns
-
- 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
Abstract
The invention relates to the technical field of rail equipment manufacturing and discloses a manufacturing method for a movable device of a cast steel curved support. The manufacturing method comprises the steps of S1, mold manufacturing and assembling, S2, paint coating and mold roasting, S3, bin packing, S4, pouring, and S5, cleaning. By the adoption of the manufacturing method for the movable device of the cast steel curved support, the defects of sand inclusion, pores, cracks, shrinkage porosity and cavity, poor surface quality and the like of an upper pendulum and a lower pendulum are overcome.
Description
Technical field
The present invention relates to track equipment manufacturing technology field, refer to a kind of cast steel curve support movable mounting making method especially.
Background technology
Prestressed reinforced concrete (prestressedconcrete, PC) shifting bearing of the special cast steel pulling force curve support of track girder is hinge (roller) axle formula, it is carry out between track girder with bent cap being connected and load transmission, and beam body vertical support and the mechanism of beam body longitudinal displacement requirement can be met. The shifting bearing of this curve support comprises pendulum and the bottom.
The special cast steel pulling force bearing of PC track girder is bear the component erected to load at PC beam-ends, and the upper pendulum of whole curve support, the bottom and T-shaped chute foundation plate are steel casting. The upper pendulum of shifting bearing is connected by roll shaft and bearing plate with the bottom, erects to except transmission around roll shaft except meeting beam body, moreover it is possible to meet the needs of beam body longitudinal displacement. The quality of upper pendulum, the bottom and T-shaped chute foundation plate quality be directly connected to circuit by power safety and work-ing life.
If the upper bottom produced by general castmethod (sand mold casting) easily forms folder sand, pore, crackle, Shrinkage cavity, the defects such as surface quality difference, and also mechanical property is poor.
Summary of the invention
The present invention proposes a kind of cast steel curve support movable mounting making method, and the upper bottom that the manufacture craft solving prior art makes easily forms folder sand, pore, crackle, Shrinkage cavity, the problem of surface quality difference.
A kind of cast steel curve support movable mounting making method of the present invention, the bottom that cast steel curve support movable mounting comprises pendulum and matches with upper pendulum, manufacturing step comprises:
S1, molding group mould: the mode adopting cutting product, make respective vertical plate and bottom parts, then built-up pattern according to the respective form of upper pendulum, the bottom respectively with metallic aluminium mould, before built-up pattern, each module is dried, then bonding with hot melt adhesive, and cover the gap between module by strips of newspaper;
S2, coating coating and baking mould: the tailor-(made) coating adopting ZG275-485H, coating adds each composition in proportion by processing requirement, brushes described model and dries, and brushing is dried and repeatedly carried out at least six times, and bake out temperature controls at 60 DEG C～80 DEG C;
S3, vanning: sandbox inner bottom part loads molding sand and strikes off, and molding sand granularity is 30～50 orders, temperature less than 15 DEG C, puts into described model at described sandbox, then even stucco in sandbox, and Bian Sabian vibrates sandbox;
S4, cast: by the pouring molten steel of melting to, in the die cavity of described model, teeming temperature is 1600 DEG C～1620 DEG C, pouring speed 18～22KG/S, and cast limit, limit vibrates the sandbox of described model;
S5, cleaning: 16～20 as a child unpacked afterwards obtains upper pendulum and the bottom.
Wherein, in described step S2, the concentration of first time coating coating is minimum, and the concentration of second time coating coating is the highest, third time and apply coating afterwards concentration between first time and second time.
Wherein, in described step S2, when drying room dries mould, the interval scheduled time moves described model by predetermined way, and ensures indoor each point temperature-stable, humidity≤30%.
Wherein, in described step S3, also it is included in the dead angle CO of model outside surface2-sodium silicate sand tamps, or the mounting process wire netting when molding in advance, impels CO2-sodium silicate sand not easily shakes in sandbox and comes off.
Wherein, the cast of step S4 specifically comprises:
Beginning to water vibrational frequency is 120Hz, and more many with watering fluence, vibrational frequency evenly reduces, and watering vibrational frequency eventually is 28Hz;
Maintenance frequency is 28Hz, after 10～15 minutes at rising head teeming molten steel once, continue vibration after 10～15 minutes again at rising head teeming molten steel once;
Vacuum pressure keep 15 minutes under 0.07～0.09MPa after pressure release, continue vibration 20 minutes after stop.
Wherein, with oxy-acetylene Thorough combustion model before described step S4 pours into a mould, then lead to into pressurized air to the die cavity of model, with the impurity blown down in die cavity.
Wherein, in the raw scrap material of the molten steel of melting, Cr, Ni, Cu, Mo, V total amount is no more than 0.80%, and carbon equivalent≤0.45.
The present invention is molded by disappearing to make the upper bottom and improves its comprehensive mechanical property, especially surrenders, tensile strength and impelling strength, more can meet foundry goods load and anti-fatigue ability. Decrease process redundancy, control the distortion amount of product, solve the Shrinkage cavity that product may occur, folder sand, pore, crackle, the defects such as surface quality difference. Solve molded the making in product that disappear and at regional area, swell occurs, fried case, the situations such as exoncoma. Optimize the feeding effect of casting technique, it is to increase the recovery rate of product, reduce cost, it is to increase yield rate.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, it is briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the upper pendulum schematic diagram of curve support movable mounting;
Fig. 2 is the bottom schematic diagram of curve support movable mounting;
Fig. 3 is a kind of curve support movable mounting making method schema of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only the present invention's part embodiment, instead of whole embodiments. Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figures 1 to 3, the upper bottom making method of the present embodiment comprises step:
S1, molding group mould: the mode adopting cutting product, respective vertical plate and bottom parts (the vertical plate 1 of upper pendulum, upper pendulum base plate 2, the vertical plate 3 of the bottom and bottom base plate 4) is made respectively according to the respective form of upper pendulum, the bottom, then built-up pattern of metallic aluminium mould.Module must be dried before built-up pattern, then bonding with hot melt adhesive, and cover the gap between module by strips of newspaper.
S2, coating coating and baking mould: using ZG275-485H coating, brushing model is also dried, brushing is dried and is repeatedly carried out six times, storing temperature control 60～80 DEG C.
Specifically, the concentration of first time coating coating is minimum, and the concentration of second time coating coating is the highest, third time and apply coating afterwards concentration between first time and second time. In the present embodiment, first time coating concentration is low, and second time is slightly dense, normal after third time. Concentration standard is insert in the coating prepared with special coupon, then mentions, and the drippage situation observing coating judges. Finally reach 8mm to ensure the paint thickness of coating, make model have enough intensity and ventilation property. In drying room, model is placed on special tooling, high about 800mm. Necessary time presses predetermined way mobility model every the scheduled time, does not stay the oven dry dope layer at dead angle, ensures indoor each point temperature-stable, humidity≤30%.
S3, vanning: sandbox inner bottom part loads molding sand and strikes off, and molding sand granularity is 30～50 orders, temperature less than 15 DEG C, puts into described model at described sandbox, and then even stucco in sandbox, Bian Sabian vibrates sandbox.
Specifically, loading suitable bed load (nice foundry sand) and strike off in sandbox, molding sand granularity is 30～50 orders, temperature less than 15 degree, to ensure that molding sand has enough intensity and ventilation property under vacuum pressure (0.07～0.09MPa). Put into model, Fang Sha limit, limit vibration (frequency is first slow rear fast, and the time is first long rear short). Put sand process and want even stucco, and go with hand to tamp the place that sand is not easy inflow. CO is used if desired at the dead angle (in such as Fig. 2 region shown in broken box) of model outside surface2-sodium silicate sand tamps, and according to the practical situation put in the place easily shaking and coming off, the mounting process wire netting when molding, impels CO in advance2-sodium silicate sand not easily shakes in sandbox and comes off.
S4, cast: by the pouring molten steel of melting to, in the die cavity of described model, teeming temperature is 1600 DEG C～1620 DEG C, pouring speed 18～22KG/S, and cast limit, limit vibrates the sandbox of described model.
Adopting high-quality steel scrap (thin material) during melting, chemical composition is smelted by the inner quality standard in such as following table 1, and Cr, Ni, Cu, Mo, V total amount is no more than 0.80%, and carbon equivalent≤0.45.
Table 1 product chemical composition GB and internal control standard
In the present embodiment, cast concrete steps comprise:
Beginning to water vibrational frequency is 120Hz, and more many with watering fluence, vibrational frequency evenly reduces, and watering vibrational frequency eventually is 28Hz;
Maintenance frequency is 28Hz, after 10～15 minutes at rising head teeming molten steel once, continue vibration after 10～15 minutes again at rising head teeming molten steel once;
Vacuum pressure keep 15 minutes under 0.07～0.09MPa after pressure release, continue vibration 20 minutes after stop.
Preferably, with oxy-acetylene Thorough combustion model before cast, then lead to into pressurized air to the die cavity of model, with the impurity blown down in die cavity.
S5, cleaning: 16～20 as a child unpacked obtains upper pendulum and the bottom. Usually also comprise the step that the upper bottom is heat-treated afterwards.
For the upper bottom that above-mentioned making method makes, having tested by following testing standard, test result is as shown in table 2 below.
Tension specimen GB6397-86, tensile test method GB228-76; Impact test method GB2106-80/GB229-84, impact specimen: V-type standard test block, sample producing;Should produce on mechanical property coupon/product connect on body (product ontology) sample extract, mechanical property test block should meet the regulation of GB5676-85, and manages with furnace treatment with product.
Touchstone: often criticize foundry goods and get a tension specimen and three impact specimens.
Evaluation and reinspection: it is qualified that mechanical property meets table 2 regulation control criterion scope, specify as do not met table 2, according to circumstances upper pendulum and the bottom can be carried out repeatedly thermal treatment (but foundry goods must not another warm process more than 3 times), review the inner quality standard in data fit table 2 (inner quality standard is the standard stricter than GB, to ensure that quality product is more stable).
Table 2 product mechanical property standard (GB and inner quality standard)
The foregoing is only the better embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment of doing, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a cast steel curve support movable mounting making method, it is characterised in that, the bottom that cast steel curve support movable mounting comprises pendulum and matches with upper pendulum, manufacturing step comprises:
S1, molding group mould: the mode adopting cutting product, make respective vertical plate and bottom parts, then built-up pattern according to the respective form of upper pendulum, the bottom respectively with metallic aluminium mould, before built-up pattern, each module is dried, then bonding with hot melt adhesive, and cover the gap between module by strips of newspaper;
S2, coating coating and baking mould: the tailor-(made) coating adopting ZG275-485H, coating adds each composition in proportion by processing requirement, brushes described model and dries, and brushing is dried and repeatedly carried out at least six times, and bake out temperature controls at 60 DEG C～80 DEG C;
S3, vanning: sandbox inner bottom part loads molding sand and strikes off, and molding sand granularity is 30～50 orders, temperature less than 15 DEG C, puts into described model at described sandbox, then even stucco in sandbox, and Bian Sabian vibrates sandbox;
S4, cast: by the pouring molten steel of melting to, in the die cavity of described model, teeming temperature is 1600 DEG C～1620 DEG C, pouring speed 18～22KG/S, and cast limit, limit vibrates the sandbox of described model;
S5, cleaning: 16～20 as a child unpacked afterwards obtains upper pendulum and the bottom.
2. cast steel curve support movable mounting making method as claimed in claim 1, it is characterized in that, in described step S2, the concentration of first time coating coating is minimum, the concentration of second time coating coating is the highest, third time and apply coating afterwards concentration between first time and second time.
3. cast steel curve support movable mounting making method as claimed in claim 1, it is characterised in that, in described step S2, when drying room dries mould, the interval scheduled time moves described model by predetermined way, and ensures indoor each point temperature-stable, humidity≤30%.
4. cast steel curve support movable mounting making method as claimed in claim 1, it is characterised in that, in described step S3, also it is included in the dead angle CO of model outside surface2-sodium silicate sand tamps, or the mounting process wire netting when molding in advance, impels CO2-sodium silicate sand not easily shakes in sandbox and comes off.
5. cast steel curve support movable mounting making method as claimed in claim 1, it is characterised in that, the cast of step S4 specifically comprises:
Beginning to water vibrational frequency is 120Hz, and more many with watering fluence, vibrational frequency evenly reduces, and watering vibrational frequency eventually is 28Hz;
Maintenance frequency is 28Hz, after 10～15 minutes at rising head teeming molten steel once, continue vibration after 10～15 minutes again at rising head teeming molten steel once;
Vacuum pressure keep 15 minutes under 0.07～0.09MPa after pressure release, continue vibration 20 minutes after stop.
6. cast steel curve support movable mounting making method as claimed in claim 1, it is characterised in that, with oxy-acetylene Thorough combustion model before described step S4 pours into a mould, then lead to into pressurized air to the die cavity of model, with the impurity blown down in die cavity.
7. cast steel curve support movable mounting making method as claimed in claim 1, it is characterised in that, in the raw scrap material of the molten steel of melting, Cr, Ni, Cu, Mo, V total amount is no more than 0.80%, and carbon equivalent≤0.45.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610099449.7A CN105665639B (en) | 2016-02-23 | 2016-02-23 | Cast steel curve support head preparation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610099449.7A CN105665639B (en) | 2016-02-23 | 2016-02-23 | Cast steel curve support head preparation method |
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| CN105665639A true CN105665639A (en) | 2016-06-15 |
| CN105665639B CN105665639B (en) | 2018-02-02 |
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| CN201610099449.7A Expired - Fee Related CN105665639B (en) | 2016-02-23 | 2016-02-23 | Cast steel curve support head preparation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109894579A (en) * | 2017-12-08 | 2019-06-18 | 汪风珍 | A kind of " lost-wax process " metal/alloy casting technique |
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| JPH03128161A (en) * | 1989-10-16 | 1991-05-31 | Sankyo Oiruresu Kogyo Kk | Manufacture of complex sliding member |
| CN102049468A (en) * | 2009-10-28 | 2011-05-11 | 望城县湖动铸业机械有限公司 | Process for casting large-sized loader gear box body by using lost foam |
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| CN103418746A (en) * | 2013-08-25 | 2013-12-04 | 阳城县华王通用离心铸管厂 | Technique for casting gray cast iron thin-wall pipe fitting evanescent die |
| CN103789605A (en) * | 2014-02-19 | 2014-05-14 | 恒天重工股份有限公司 | Manufacturing method of spheroidal graphite cast iron casting of wind power yaw variable-pitch device |
| CN104128561A (en) * | 2014-07-30 | 2014-11-05 | 渠县金城合金铸业有限公司 | Expendable casting process method for heat-resistant steel perforated grate plate |
| CN104162633A (en) * | 2013-05-17 | 2014-11-26 | 湘潭三泰机械制造有限公司 | Lost foam casting production low-carbon steel upper core disc and impact seat processing method |
| CN104399891A (en) * | 2014-11-27 | 2015-03-11 | 温州兰理工科技园有限公司 | Casting method combining investment precise shell-making process with vacuum suction molding technology |
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2016
- 2016-02-23 CN CN201610099449.7A patent/CN105665639B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03128161A (en) * | 1989-10-16 | 1991-05-31 | Sankyo Oiruresu Kogyo Kk | Manufacture of complex sliding member |
| CN102049468A (en) * | 2009-10-28 | 2011-05-11 | 望城县湖动铸业机械有限公司 | Process for casting large-sized loader gear box body by using lost foam |
| CN104162633A (en) * | 2013-05-17 | 2014-11-26 | 湘潭三泰机械制造有限公司 | Lost foam casting production low-carbon steel upper core disc and impact seat processing method |
| CN103418747A (en) * | 2013-08-25 | 2013-12-04 | 阳城县华王通用离心铸管厂 | Lost foam casting process for double-bell-and-spigot grey cast iron thin wall pipe fittings and sand box for process |
| CN103418746A (en) * | 2013-08-25 | 2013-12-04 | 阳城县华王通用离心铸管厂 | Technique for casting gray cast iron thin-wall pipe fitting evanescent die |
| CN103789605A (en) * | 2014-02-19 | 2014-05-14 | 恒天重工股份有限公司 | Manufacturing method of spheroidal graphite cast iron casting of wind power yaw variable-pitch device |
| CN104128561A (en) * | 2014-07-30 | 2014-11-05 | 渠县金城合金铸业有限公司 | Expendable casting process method for heat-resistant steel perforated grate plate |
| CN104399891A (en) * | 2014-11-27 | 2015-03-11 | 温州兰理工科技园有限公司 | Casting method combining investment precise shell-making process with vacuum suction molding technology |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109894579A (en) * | 2017-12-08 | 2019-06-18 | 汪风珍 | A kind of " lost-wax process " metal/alloy casting technique |
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