CN105665639B - Cast steel curve support head preparation method - Google Patents
Cast steel curve support head preparation method Download PDFInfo
- Publication number
- CN105665639B CN105665639B CN201610099449.7A CN201610099449A CN105665639B CN 105665639 B CN105665639 B CN 105665639B CN 201610099449 A CN201610099449 A CN 201610099449A CN 105665639 B CN105665639 B CN 105665639B
- Authority
- CN
- China
- Prior art keywords
- coating
- support head
- model
- cast
- curve support
- Prior art date
- 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.)
- Expired - Fee Related
Links
Classifications
-
- 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 present invention relates to track equipment manufacturing technology field, discloses a kind of cast steel curve support head preparation method, including step：S1, molding group mould；S2, coating coating and mould drying；S3, vanning；S4, cast；S5, cleaning.The cast steel curve support head preparation method of the present invention avoids the bottom and forms burning into sand, stomata, crackle, Shrinkage cavity, the defects of surface quality difference.
Description
Technical field
The present invention relates to track equipment manufacturing technology field, particularly relates to a kind of cast steel curve support head making side
Method.
Background technology
The special cast steel pull-up curve bearing of prestressed reinforced concrete (prestressed concrete, PC) track girder
Movable bearing support is hinge (roller) shaft type, be attached between track girder and bent cap with load transmission, and can meet that beam body is vertically propped up
Hold the mechanical device with beam body length travel requirement.The movable bearing support of the curve support includes upper pendulum and the bottom.
The special cast steel pulling force bearing of PC track girders is that the component of vertical load is born in PC beam-ends, whole curve support it is upper
Pendulum, the bottom and T-shaped chute base plate are steel-casting.The upper pendulum of movable bearing support is connected with the bottom by roll shaft and bearing plate, except full
Vertically transmission is outer around roll shaft for sufficient beam body, moreover it is possible to meets the needs of beam body length travel.Upper pendulum, the bottom and T-shaped chute base plate
The quality of quality is directly connected to the stress safety and service life of circuit.
If the upper bottom that casting method (sand casting) is produced by easily forms burning into sand, stomata, crackle, shrinkage porosite
Shrinkage cavity, the defects of surface quality difference, and mechanical performance is poor.
The content of the invention
The present invention proposes a kind of cast steel curve support head preparation method, solves the manufacture craft system of prior art
The upper bottom made easily forms burning into sand, stomata, crackle, Shrinkage cavity, the problem of surface quality difference.
A kind of cast steel curve support head preparation method of the present invention, cast steel curve support head include upper pendulum
The bottom being engaged is put with upper, manufacturing step includes：
S1, molding group mould：By the way of partitioning products, with metal aluminum dipping form respectively according to upper pendulum, the respective form of the bottom
Respective riser and bottom parts are made, then built-up pattern, each module is dried before built-up pattern, then uses melt viscosity
Connect, and with the gap between strips of newspaper overlay module；
S2, coating coating and mould drying：Using ZG275-485H special coating, coating is added respectively in proportion by technological requirement
Composition, brush the model and dry, brushing drying is repeated at least six times, and drying temperature is controlled at 60 DEG C~80 DEG C；
S3, vanning：Sandbox inner bottom part loads molding sand and simultaneously struck off, and molding sand granularity is 30~50 mesh, below 15 DEG C of temperature, is put into
The model is in the sandbox, the then uniform stucco into sandbox, Bian Sabian vibration sandboxes；
S4, cast：By in the die cavity of the pouring molten steel of melting to the model, pouring temperature is 1600 DEG C~1620 DEG C,
18~22kg/s of poring rate, the sandbox of the model is vibrated in cast；
S5, cleaning：Unpacked after 16~20 hours and obtain pendulum and the bottom.
Wherein, in the step S2, the concentration of coating coating is minimum for the first time, second of concentration highest for coating coating,
Third time and the concentration for coating coating afterwards are between first time and second.
Wherein, in the step S2, in drying room mould drying, the interval scheduled time moves the model by predetermined way, and
Ensure indoor each point temperature stabilization, humidity≤30%.
Wherein, in the step S3, it is additionally included in the dead angle CO of model outer surface2- water-glass sand tamps, or exists in advance
Mounting process wire netting during molding, promotes CO2- water-glass sand is not easy to shake to come off in sandbox.
Wherein, step S4 cast specifically includes：
It is 120Hz that beginning, which pours vibration frequency, and more with fluence is poured, vibration frequency uniformly reduces, and it is 28Hz to pour vibration frequency eventually；
Keep frequency is 28Hz, after 10~15 minutes in hot topping molten steel once, is continued after vibration 10~15 minutes again
In hot topping molten steel once；
Pressure release after vacuum pressure is kept for 15 minutes under 0.07~0.09MPa, stop after continuing vibration 20 minutes.
Wherein, the preceding abundant combustion model of oxy-acetylene is poured into a mould in the step S4, is then passed through compression to the die cavity of model
Air, to blow down the impurity in die cavity.
Wherein, in the raw scrap material of the molten steel of melting, Cr, Ni, Cu, Mo, V total amount are no more than 0.80%, and carbon equivalent≤
0.45% 。
The present invention manufactured by evaporative pattern the mechanical performance that the upper bottom improves its synthesis, especially surrender, tensile strength and
Impact flexibility, it can more meet casting load and anti-fatigue ability.Reduce allowance, control the deflection of product, solve
The Shrinkage cavity that product is likely to occur, burning into sand, stomata, crackle, the defects of surface quality difference.Solves evaporative pattern manufacture product
In in regional area there is swell, case is fried, situations such as exoncoma.The feeding effect of casting technique is optimized, improves the receipts of product
Yield, cost is reduced, improve yield rate.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is the upper pendulum schematic diagram of curve support head；
Fig. 2 is the bottom schematic diagram of curve support head；
Fig. 3 is a kind of curve support head preparation method flow chart 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 carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
As shown in Figures 1 to 3, the upper bottom preparation method of the present embodiment includes step：
S1, molding group mould：By the way of partitioning products, with metal aluminum dipping form respectively according to upper pendulum, the respective form of the bottom
Respective riser and bottom parts (above putting riser 1, upper pendulum bottom plate 2, bottom riser 3 and bottom bottom plate 4) are made, then combination die
Type.Module must be dried before built-up pattern, be then bonded with PUR, and with the gap between strips of newspaper overlay module.
S2, coating coating and mould drying：With ZG275-485H coating, brushing model is simultaneously dried, and brushing drying is repeated six
Secondary, baking temperature controls 60~80 DEG C.
Specifically, the concentration of coating coating is minimum for the first time, second of concentration highest for coating coating, for the third time and afterwards
The concentration for coating coating is between first time and second.In the present embodiment, coating concentration is low for the first time, for the second time slightly
It is dense, it is normal after third time.Concentration standard is in the coating prepared with special coupon insertion, then lifts, observes coating
Drippage situation judges.To ensure that the paint thickness of coating is finally reached 8mm, model is set to have enough intensity and gas permeability.Drying room
Interior, model is placed on special tooling, high 800mm or so.Necessary time presses predetermined way mobility model every the scheduled time, does not stay
The drying dope layer at dead angle, ensure indoor each point temperature stabilization, humidity≤30%.
S3, vanning：Sandbox inner bottom part loads molding sand and simultaneously struck off, and molding sand granularity is 30~50 mesh, below 15 DEG C of temperature, is put into
The model is in the sandbox, the then uniform stucco into sandbox, Bian Sabian vibration sandboxes.
Specifically, appropriate bed load (nice foundry sand) is loaded in sandbox to strike off, molding sand granularity is 30~50 mesh, 15 degree of temperature with
Under, to ensure that molding sand has enough intensity and gas permeability under vacuum pressure (0.07~0.09MPa).It is put into model, Bian Fangsha
Side vibration (frequency to be fast after first slow, the time first grow after it is short).Put sand process and want uniform stucco, and go to tamp sand with hand and be not easy to flow
The place entered.If necessary CO is used in the dead angle of model outer surface (region as shown in dotted line frame in Fig. 2)2- water-glass sand tamps,
According to the actual conditions put in the place that comes off of easily shaking, the mounting process wire netting in molding, promotes CO in advance2- waterglass
Sand is not easy to shake to come off in sandbox.
S4, cast：By in the die cavity of the pouring molten steel of melting to the model, pouring temperature is 1600 DEG C~1620 DEG C,
18~22kg/s of poring rate, the sandbox of the model is vibrated in cast.
High-quality steel scrap (thin material) is used during melting, chemical composition is smelted by the inner quality standard in such as table 1 below, Cr,
Ni, Cu, Mo, V total amount are no more than 0.80%, and carbon equivalent≤0.45%.
The product chemical composition national standard of table 1 and internal control standard
In the present embodiment, cast specific steps include：
It is 120Hz that beginning, which pours vibration frequency, and more with fluence is poured, vibration frequency uniformly reduces, and it is 28Hz to pour vibration frequency eventually；
Keep frequency is 28Hz, after 10~15 minutes in hot topping molten steel once, is continued after vibration 10~15 minutes again
In hot topping molten steel once；
Pressure release after vacuum pressure is kept for 15 minutes under 0.07~0.09MPa, stop after continuing vibration 20 minutes.
Preferably, the preceding abundant combustion model of oxy-acetylene is poured into a mould, is then passed through compressed air to the die cavity of model, to blow down
Impurity in die cavity.
S5, cleaning：Unpack within 16~20 hours and obtain pendulum and the bottom.Generally also include being heat-treated the upper bottom afterwards
The step of.
The upper bottom made for above-mentioned preparation method, is tested, test result such as table 2 below by following testing standard
It is shown.
Tensile sample GB6397-86, pull test method GB228-76；Impact test method GB2106-80/GB229-84,
Impact specimen：V-type reference block, sample producing；Should be produced on mechanical property coupon/product disjunctor (product ontology) sample on
Extract, mechanical property test block should meet GB5676-85 regulation, and be managed with product with furnace treatment.
Testing standard：Every batch of casting takes a tensile sample and three impact specimens.
Evaluation and reinspection：It is qualified that mechanical performance, which meets the regulation of table 2 to control critical field, does not meet table 2 such as and provides, can
According to circumstances upper pendulum and the bottom are carried out repeatedly to be heat-treated (but casting must not be heat-treated more than 3 times again), review data fit
Inner quality standard in table 2 (inner quality standard is the standard more tightened up than national standard, to ensure that product quality is more stable).
The product mechanical performance standard (national standard and inner quality standard) of table 2
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (6)
1. a kind of cast steel curve support head preparation method, it is characterised in that cast steel curve support head includes upper
Pendulum and the bottom being engaged with upper pendulum, manufacturing step include：
S1, molding group mould：By the way of partitioning products, made respectively according to upper pendulum, the respective form of the bottom of metal aluminum dipping form
Respective riser and bottom parts, then built-up pattern, each module is dried before built-up pattern, be then bonded with PUR, and
With the gap between strips of newspaper overlay module；
S2, coating coating and mould drying：Using ZG275-485H special coating, coating added in proportion by technological requirement it is each into
Point, brush the model and dry, brushing drying is repeated at least six times, and drying temperature is controlled at 60 DEG C~80 DEG C, first
The concentration of secondary coating coating is minimum, coats the concentration highest of coating for the second time, third time and the concentration for coating coating afterwards are Jie
In for the first time between second, and concentration all same, paint thickness are finally reached 8mm every time；
S3, vanning：Sandbox inner bottom part loads molding sand and simultaneously struck off, and molding sand granularity be 30~50 mesh, below 15 DEG C of temperature, be put into described in
Model is in the sandbox, the then uniform stucco into sandbox, Bian Sabian vibration sandboxes；
S4, cast：By in the die cavity of the pouring molten steel of melting to the model, pouring temperature is 1600 DEG C~1620 DEG C, cast
18~22kg/s of speed, the sandbox of the model is vibrated in cast；
S5, cleaning：Unpacked after 16~20 hours and obtain pendulum and the bottom.
2. cast steel curve support head preparation method as claimed in claim 1, it is characterised in that in the step S2,
In drying room mould drying, the interval scheduled time moves the model by predetermined way, and ensures indoor each point temperature stabilization, and humidity≤
30%.
3. cast steel curve support head preparation method as claimed in claim 1, it is characterised in that in the step S3,
It is additionally included in the dead angle CO of model outer surface2- water-glass sand tamps, or the mounting process wire netting in molding in advance, promotes
CO2- water-glass sand is not easy to shake to come off in sandbox.
4. cast steel curve support head preparation method as claimed in claim 1, it is characterised in that step S4 cast tool
Body includes：
It is 120Hz that beginning, which pours vibration frequency, and more with fluence is poured, vibration frequency uniformly reduces, and it is 28Hz to pour vibration frequency eventually；
Keep frequency is 28Hz, after 10~15 minutes in hot topping molten steel once, is being emitted again after continuing vibration 10~15 minutes
Mouth teeming molten steel is once；
Pressure release after vacuum pressure is kept for 15 minutes under 0.07~0.09MPa, stop after continuing vibration 20 minutes.
5. cast steel curve support head preparation method as claimed in claim 1, it is characterised in that poured in the step S4
The preceding abundant combustion model of oxy-acetylene of note, is then passed through compressed air, to blow down the impurity in die cavity to the die cavity of model.
6. cast steel curve support head preparation method as claimed in claim 1, it is characterised in that the molten steel of melting gives up
In steel raw material, Cr, Ni, Cu, Mo, V total amount are 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 |
Applications Claiming Priority (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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105665639A CN105665639A (en) | 2016-06-15 |
| CN105665639B true CN105665639B (en) | 2018-02-02 |
Family
ID=56304889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610099449.7A Expired - Fee Related CN105665639B (en) | 2016-02-23 | 2016-02-23 | Cast steel curve support head preparation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105665639B (en) |
Families Citing this family (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 |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0771735B2 (en) * | 1989-10-16 | 1995-08-02 | 三協オイルレス工業株式会社 | Method for manufacturing composite sliding member |
-
2016
- 2016-02-23 CN CN201610099449.7A patent/CN105665639B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105665639A (en) | 2016-06-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2009066929A3 (en) | Continuous cast slab and method for manufacturing the same | |
| CN101898228A (en) | Method for casting sound casting by using lost foam coated with high-performance coating in vibration way | |
| CN103173664A (en) | Al-Mg-Si-Cu alloy material and application thereof on aluminum control arm of automobile | |
| DE102016205960A1 (en) | Use of closed-pore microballs of expanded perlite as a filler for the production of moldings for the foundry industry | |
| CN105695779A (en) | Preparation method of high-precision and high-cleanliness aluminum alloy rod | |
| CN101823140A (en) | Process for manufacturing saloon car clutch pressure plate casting | |
| DE502005009647D1 (en) | METHOD FOR MANUFACTURING A CASTING COMPONENT | |
| CA2000802A1 (en) | A method for forming metal matrix composite bodies with a dispersion casting technique and products produced thereby | |
| CN105665639B (en) | Cast steel curve support head preparation method | |
| CN105598370B (en) | T-shaped chute pedestal board manufacturing method | |
| CN108889917A (en) | It is a kind of for providing the mold liquid level static type casting method of high-quality slab quality | |
| EP1786576B1 (en) | Method and device for casting molten metal | |
| CN102397993B (en) | Production technology of air-conditioning compressor crankshaft | |
| CN102416440A (en) | Casting method for liquid metal pouring of lost mold casting model in high-frequency micro-vibration field under negative pressure of dry sand | |
| CN102259168B (en) | Process for casting rope sheave of elevator | |
| WO2007003587A2 (en) | Molding compound for producing a refractory lining | |
| KR100653161B1 (en) | Pressure-casting method of semisolid Al matrix composite | |
| DE112014002622T5 (en) | Investment casting core, method for producing a investment casting core, and investment casting tool | |
| CN208800744U (en) | A kind of rouge hardening automatic harding glass sand mold making apparatus | |
| CN106001426B (en) | A kind of yoke plate casting technique | |
| CN110714135A (en) | Preparation method of porous impact-resistant high-temperature alloy material | |
| CN109175244B (en) | Preparation method of high-temperature-resistant casting ladle for ferromanganese smelting | |
| RU2781940C1 (en) | Steel modification method | |
| CN108311654A (en) | The production method of thick-walled metal mold is prepared using centrifugal method | |
| DE2807930C2 (en) | Method and casting mold for the production of centrifugal casting molds from nitrogen-containing cast iron |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180202 Termination date: 20190223 |