CN102432978A - Grinder of bullet train tread cleaner and production method thereof - Google Patents
Grinder of bullet train tread cleaner and production method thereof Download PDFInfo
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- CN102432978A CN102432978A CN2011102359848A CN201110235984A CN102432978A CN 102432978 A CN102432978 A CN 102432978A CN 2011102359848 A CN2011102359848 A CN 2011102359848A CN 201110235984 A CN201110235984 A CN 201110235984A CN 102432978 A CN102432978 A CN 102432978A
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Abstract
The invention provides a grinder of a bullet train tread cleaner, wherein the grinder is made of a composite material; the composite materials comprises modified phenolic resin 6818, iron powder, copper fibres, steel fibres, sepiolite, potassium feldspar, graphite, cryolite and aluminium oxide; the invention further provides a production method of the grinder.
Description
Technical field
The present invention relates to field of milling, specifically, relate to grinding and the method for manufacture thereof that are used for the motor-car tread cleaner.
Background technology
The motor-car tread cleaner plays a part the cleaning wheel, increases the wheel rail adhesion coefficient to guarantee high-speed train braking safety, and the parts that tread cleaner directly acts on the wheel are known as grinding.Grind the sub common matrix material of high metal content that adopts and process, thereby adopt the intermittently perhaps continuous low pressure contact of low speed wheel to play cleaning and viscosifying action.
Present employed grinding has great number of issues, for example in use occurs damascene easily, can produce injurious effects to wheel when it is serious; For example using the later stage again; Grind sub-surface and thermal crack can occur, cause that easily slag falls piece, and then have a strong impact on traffic safety.In addition, the existing modulus of compression that is used to make the material that grinds son is higher, and contact area is little and applied pressure is high, thereby causes local contact, consequently because of heat effect wheel is caused thermal damage.
Summary of the invention
The objective of the invention is to existing above-mentioned defective in the prior art, provide a kind of motor-car tread cleaner that is used for to grind son.
For this reason, motor-car tread cleaner provided by the present invention grinds son and is processed by matrix material, and the component of this matrix material comprises modified phenolic resins 6818, reduced iron powder, copper fiber, steel fiber, sepiolite, potassium felspar sand, graphite, sodium aluminum fluoride and aluminum oxide.Wherein, the weight percent of each component of said matrix material is preferably: modified phenolic resins 6818:24.11%, reduced iron powder: copper fiber 35.03%: steel fiber 13.62%: sepiolite 6.03%: potassium felspar sand 4.61%: graphite 4.54%: sodium aluminum fluoride 4.40%: aluminum oxide 3.90%: 3.76%.
The present invention also provides a kind of grinding sub-preparation method, and it may further comprise the steps: material component is provided; Mix said material component; Mixed material component is put into molding apparatus be molded as work in-process grinding; Make work in-process grind son and under the temperature of setting, accept thermal treatment; Let grinding after the thermal treatment naturally cool to below 80 ℃.
Grinding that adopts such matrix material to process is compared with prior art has numerous advantages.Such as, adopted 6818 modified resin as tackiness agent, directly utilized nitrile rubber modified phenolic resin, reduced the modulus of compression that grinds son, reduce thermal damage to wheel; Adopt 6818 modified resin as tackiness agent, improved the moulding process that grinds son.Twin-roll mixing (efficient is low) when having avoided using rubber; When having improved same dry method simultaneously, the rubber powder of employing does not have the purpose that reduces modulus of compression.Adopted the copper fiber as strongthener.Play enhancement, have the heat of friction of passing to simultaneously, improved the overall thermal conduction of grinding son, avoided the tread temperature too high.Adopt long stapled sepiolite, the shock strength of grinding son is improved, having reduced " fall slag, fall piece " of grinding son maybe.The employing sodium aluminum fluoride is a raw material, and during to the condition of high temperature, after a part of modified resin cracking, sodium aluminum fluoride can play certain adhesive effect to various fillers, makes grinding in the condition of high temperature new tackiness agent arranged.
Aforesaid method preferably adopts the mode of ladder-elevating temperature that work in-process are ground son and heat-treats.Simultaneously, preferably include a plurality of heat treatment steps in this method, each heat treatment step has different starting temperatures, and PM heats up 1 ℃ in each heat treatment step.Said a plurality of heat treatment step and being preferably starting temperature/heat-up time: 120 ℃/1 hour → 130 ℃/1 hour → 150 ℃/2 hours → 160 ℃/3 hours → 170 ℃/2 hours → 180 ℃/4 hours, naturally cool to 80 ℃ then with bottom discharge.
Thereby said method has been avoided grinding in the sub-use because carried out thermal treatment modified resin is fully solidified grinding sub-work in-process, high temperature stress crackle and thermal crack occur.Simultaneously, owing to adopted ladder-elevating temperature, thus having improved the yield rate of grinding son, thermal crack and stress shrinkage crack appear when having avoided aftertreatment.
Embodiment
Grinding of the present invention is made by matrix material.This matrix material is made up of numerous components.These components preferably include modified phenolic resins 6818, reduced iron powder, copper fiber, steel fiber, sepiolite, potassium felspar sand, graphite, sodium aluminum fluoride, aluminum oxide.Wherein, the chemical ingredients of sepiolite is silicon (Si) and magnesium (Mg) compound; Its standard crystal chemical formula is Mg
8(H
2O)
4[Si
6O
16]
2(OH)
48H
2O, wherein SiO
2Generally between 54%-60%, MgO content is many in the 21-25% scope for content.Potassium felspar sand is the potassic silicate minerals of a kind of richness, K [AlSi
3O
8] three homogeneities look like the general name of variant sanidine, potash feldspar, microline more.Pure potassium felspar sand consist of K
2O 16.9%, Al
2O
318.4%, SiO
264.7%.The pure potassium felspar sand of nature is rare, and its length contains Na
2O, and contain mixture BaO, FeO, Fe
3O
2Deng.Sodium aluminum fluoride is that hexafluoro closes sodium aluminate or sodium aluminum fluoride, and molecular formula is Na
3AlF
6, be the tiny xln of white.
Preferably, the weight percent of these components is respectively: modified phenolic resins 6818:24.11, reduced iron powder: 35.03, copper fiber: 13.62, steel fiber: 6.03, sepiolite: 4.61, potassium felspar sand: 4.54, graphite: 4.40, sodium aluminum fluoride: 3.90, aluminum oxide: 3.76.More meet its environment for use and the required performance of condition for the sub-matrix material of grinding is had, the specification of these components is preferred respectively as follows:
Modified phenolic resins 6818: curing speed 60-90 second/160 ℃, paracril content is greater than 15%; It plays the toughness thermosetting adhesive in system effect, the various fillers that bond make its each self-applying of performance when tread cleans;
Reduced iron powder: iron-holder is more than 98%, fineness: more than 80 orders.It is of value to adjustment tread when cleaning and grinds son with the frictional coefficient size of wheel, the height of cleaning effect, the low effect of frictional coefficient during high, the high speed of frictional coefficient when making its low speed;
The copper fiber: length 8-10mm composition Cu＞55%, Zn＞35%, it is of value to thermal conductivity, the sub contact condition with wheel of improvement grinding that increases the sub shock strength of grinding, raising grinding Fe＜10% diameter 0.1-0.15mm;
Steel fiber: DF1-5.5 is of value to the shock strength that increases grinding, the thermal conductivity that improves grinding);
Sepiolite: MY-A type; Length 0.2-5mm, moisture are less than 4%, and whiteness is less than 80%; Sediment concentration is less than 2%, and it is of value to the shock strength, the raising that significantly improve grinding and grinds son with the frictional coefficient of wheel, the breakage that increase is ground sub each item mechanical property, prevented to grind son;
Potassium felspar sand: fineness is greater than 200 orders, and potassium oxide content is greater than 7%, and it is of value to raising and grinds the frictional coefficient of son with wheel, increases the cleaning effect;
Graphite: carbon content >=85%, fineness 100 orders, specification: flakey, it is of value to lubricated interface of grinding son with wheel, prevents the damascene of harmful wheel and to the abnormal wear of wheel;
Sodium aluminum fluoride: powdery is greater than fineness 200 orders, molecular ratio 1.9-2.0, and it is of value to when the condition of high temperature, can play the high-temperature agglomerant effect;
Aluminum oxide: purity is greater than 99%, and more than fineness 300 orders, it is of value to the surperficial carburization zone that son is ground in cleaning, is beneficial to the renewal of grinding sub-surface.
The selection of said components makes that grinding son has other numerous advantages.Such as, adopted 6818 modified resin as tackiness agent, directly utilized nitrile rubber modified phenolic resin, reduced the modulus of compression that grinds son, reduce thermal damage to wheel; Adopt 6818 modified resin as tackiness agent, improved the moulding process that grinds son.Twin-roll mixing (efficient is low) when having avoided using rubber; The rubber powder that has been adopted when having improved same way does not simultaneously have the purpose that reduces modulus of compression.Adopt the copper fiber as strongthener, played enhancement, had the heat of friction of passing to simultaneously, improved the overall thermal conduction of grinding son, avoided the tread temperature too high.Adopt long stapled sepiolite, the shock strength of grinding son is improved, reduced the possibility of grinding son " fall slag and fall piece ".The employing sodium aluminum fluoride is a raw material, and during to the condition of high temperature, after a part of modified resin cracking, sodium aluminum fluoride can play certain adhesive effect to various fillers, makes grinding in the condition of high temperature new tackiness agent arranged.
Below through instance working method of grinding son of the present invention is done detailed explanation.
At first, select component for use, preparation raw material.Selected feed composition and weight thereof are respectively: modified phenolic resins 6818:34 kilogram; Reduced iron powder: 49.4 kilograms; Copper fiber: 19.2 kilograms; Steel fiber: 8.5 kilograms; Sepiolite: 6.5 kilograms; Potassium felspar sand: 6.4 kilograms; Graphite: 6.2 kilograms; Sodium aluminum fluoride: 5.5 kilograms; Aluminum oxide: 5.3 kilograms; Amount to 140 kilograms
Then, above-mentioned load weighted starting material are put into high-speed mixer, low speed mixing is after 1 minute, and mixed at high speed is after 5 minutes, discharging.
Then, molded abrasive.1.56 kilograms the above-mentioned raw material that mixes is by weight put into 160-165 ℃ the mould of heating up, and adds and grinds sub-steel backing, and pressurization is 40 tons on four-column hydraulic press, pressurize compacting 40 minutes, mould unloading, goes out product.
Then, the sub-product of the grinding that suppresses is put into baking oven, the heat-up rate by 1 ℃/minute, adopt following program aftertreatment to grind sub-product:
80 ℃ of 120 ℃/1 hour → 130 ℃/1 hour → 150 ℃/2 hours → 160 ℃/3 hours → 170 ℃/2 hours → 180 ℃/4 hours → naturally cooling are with bottom discharge.
Grinding according to aforesaid method obtained has following physical and mechanical properties:
Density, g/cm3 4.7-4.9 oil absorbency, % 0.1
Water-intake rate, % 0.1 compressive strength, MPa 68.4
Young's modulus, GPa 1.8 shock strengths, MPa 4.8
In said method, to grinding sub half-finished thermal treatment modified resin is fully solidified, to have avoided grinding in the sub-use, high temperature stress crackle and thermal crack appear.Simultaneously, owing to adopted ladder-elevating temperature, thus having improved the yield rate of grinding son, thermal crack and stress shrinkage crack appear when having avoided aftertreatment.
Claims (8)
1. a matrix material is characterized in that, the component of this matrix material comprises modified phenolic resins 6818, reduced iron powder, copper fiber, steel fiber, sepiolite, potassium felspar sand, graphite, sodium aluminum fluoride and aluminum oxide.
2. a grinding that is used for the motor-car tread cleaner is sub; It is processed by matrix material; It is characterized in that the component of this matrix material comprises modified phenolic resins 6818, reduced iron powder, copper fiber, steel fiber, sepiolite, potassium felspar sand, graphite, sodium aluminum fluoride and aluminum oxide.
3. grinding according to claim 2; It is characterized in that the weight percent of each component of said matrix material is respectively: modified phenolic resins 6818:24.11%, reduced iron powder: copper fiber 35.03%: steel fiber 13.62%: sepiolite 6.03%: potassium felspar sand 4.61%: graphite 4.54%: sodium aluminum fluoride 4.40%: aluminum oxide 3.90%: 3.76%.
4. a method for preparing grinding that is used for the motor-car tread cleaner is characterized in that, may further comprise the steps:
Claim 2 or the sub-material component of 3 described grindings are provided;
Mix said material component;
Mixed material component is put into molding apparatus, grind son to be molded as work in-process;
Make these work in-process grind son and under the temperature of setting, accept thermal treatment;
Let grinding after the thermal treatment naturally cool to below 80 ℃.
5. preparation method according to claim 4 is characterized in that, adopts the mode of ladder-elevating temperature that work in-process grinding is heat-treated.
6. preparation method according to claim 5 is characterized in that, PM heats up 1 ℃ to form ladder-elevating temperature in the said heat treatment process.
7. preparation method according to claim 6 is characterized in that, makes work in-process grind son and accepts repeatedly thermal treatment, and each thermal treatment has different starting temperatures.
8. preparation method according to claim 7; It is characterized in that be followed successively by said repeatedly heat treated starting temperature/heat-up time: 120 ℃/1 hour → 130 ℃/1 hour → 150 ℃/2 hours → 160 ℃/3 hours → 170 ℃/2 hours → 180 ℃/4 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110235984 CN102432978B (en) | 2011-08-17 | 2011-08-17 | Grinder of bullet train tread cleaner and production method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110235984 CN102432978B (en) | 2011-08-17 | 2011-08-17 | Grinder of bullet train tread cleaner and production method thereof |
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| CN102432978A true CN102432978A (en) | 2012-05-02 |
| CN102432978B CN102432978B (en) | 2013-05-15 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103693020A (en) * | 2013-11-25 | 2014-04-02 | 浙江科特汽配有限公司 | Production technology of CRH (China Railway High-speed) train anti-wear and viscosity-increasing grinding ball |
| CN107188456A (en) * | 2017-06-12 | 2017-09-22 | 上海壬丰复合材料有限公司 | Motor-car tread cleaner correction of the flank shape grinding and preparation method thereof |
| CN107915951A (en) * | 2017-09-26 | 2018-04-17 | 上海国由复合材料科技有限公司 | High speed motor car grinding and preparation method |
| CN108359212A (en) * | 2018-01-31 | 2018-08-03 | 周学昌 | A kind of grinding and preparation method thereof for rail vehicle |
| CN108839640A (en) * | 2018-05-07 | 2018-11-20 | 度特斯(大连)实业有限公司 | A kind of high-speed EMUs grinding and preparation method thereof |
| CN109336473A (en) * | 2018-12-09 | 2019-02-15 | 马鞍山市雷狮轨道交通装备有限公司 | A kind of ceramic base grinding device for tread cleaner and preparation method thereof |
| CN109369064A (en) * | 2018-12-09 | 2019-02-22 | 马鞍山市雷狮轨道交通装备有限公司 | A kind of sub- production technology of ultralow-porosity high densification grinding |
| CN109440028A (en) * | 2018-12-09 | 2019-03-08 | 马鞍山市雷狮轨道交通装备有限公司 | A kind of preparation method of grinding device for tread cleaner |
| CN109534731A (en) * | 2018-12-09 | 2019-03-29 | 马鞍山市雷狮轨道交通装备有限公司 | A kind of rail traffic is sub with oil grinding is removed |
| CN109574561A (en) * | 2018-12-09 | 2019-04-05 | 马鞍山市雷狮轨道交通装备有限公司 | The preparation method of son is ground in a kind of rail traffic with cavetto |
| CN111875923A (en) * | 2020-07-23 | 2020-11-03 | 中国铁道科学研究院集团有限公司金属及化学研究所 | Motor train unit grinding wheel without metal inserts and with good shape correction effect |
| CN113004867A (en) * | 2021-02-23 | 2021-06-22 | 山东金麒麟股份有限公司 | Environment-friendly friction material, high-speed rail brake pad and preparation method |
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| CN201198299Y (en) * | 2008-03-24 | 2009-02-25 | 常州齐丰摩擦材料有限公司 | Grinder of wheel tread sweeper for high speed motor train unit |
| CN101805469A (en) * | 2010-04-08 | 2010-08-18 | 中国铁道科学研究院金属及化学研究所 | Wearing resistant material, composite brake pad for braking and method for preparing same |
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| CN201198299Y (en) * | 2008-03-24 | 2009-02-25 | 常州齐丰摩擦材料有限公司 | Grinder of wheel tread sweeper for high speed motor train unit |
| CN101805469A (en) * | 2010-04-08 | 2010-08-18 | 中国铁道科学研究院金属及化学研究所 | Wearing resistant material, composite brake pad for braking and method for preparing same |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103693020A (en) * | 2013-11-25 | 2014-04-02 | 浙江科特汽配有限公司 | Production technology of CRH (China Railway High-speed) train anti-wear and viscosity-increasing grinding ball |
| CN103693020B (en) * | 2013-11-25 | 2016-07-06 | 浙江科特汽配股份有限公司 | The wear-resistant thickening of EMUs grinds sub-production technology |
| CN107188456A (en) * | 2017-06-12 | 2017-09-22 | 上海壬丰复合材料有限公司 | Motor-car tread cleaner correction of the flank shape grinding and preparation method thereof |
| CN107915951A (en) * | 2017-09-26 | 2018-04-17 | 上海国由复合材料科技有限公司 | High speed motor car grinding and preparation method |
| CN108359212A (en) * | 2018-01-31 | 2018-08-03 | 周学昌 | A kind of grinding and preparation method thereof for rail vehicle |
| CN108839640A (en) * | 2018-05-07 | 2018-11-20 | 度特斯(大连)实业有限公司 | A kind of high-speed EMUs grinding and preparation method thereof |
| CN108839640B (en) * | 2018-05-07 | 2021-07-02 | 度特斯(大连)实业有限公司 | Grinder for high-speed motor train unit and preparation method thereof |
| CN109440028A (en) * | 2018-12-09 | 2019-03-08 | 马鞍山市雷狮轨道交通装备有限公司 | A kind of preparation method of grinding device for tread cleaner |
| CN109369064A (en) * | 2018-12-09 | 2019-02-22 | 马鞍山市雷狮轨道交通装备有限公司 | A kind of sub- production technology of ultralow-porosity high densification grinding |
| CN109534731A (en) * | 2018-12-09 | 2019-03-29 | 马鞍山市雷狮轨道交通装备有限公司 | A kind of rail traffic is sub with oil grinding is removed |
| CN109574561A (en) * | 2018-12-09 | 2019-04-05 | 马鞍山市雷狮轨道交通装备有限公司 | The preparation method of son is ground in a kind of rail traffic with cavetto |
| CN109336473A (en) * | 2018-12-09 | 2019-02-15 | 马鞍山市雷狮轨道交通装备有限公司 | A kind of ceramic base grinding device for tread cleaner and preparation method thereof |
| CN109440028B (en) * | 2018-12-09 | 2021-10-01 | 马鞍山市雷狮轨道交通装备有限公司 | Preparation method of tread sweeper grinding element |
| CN109574561B (en) * | 2018-12-09 | 2022-02-11 | 马鞍山市雷狮轨道交通装备有限公司 | Preparation method of rounding and grinding mill for rail transit |
| CN109369064B (en) * | 2018-12-09 | 2022-02-11 | 马鞍山市雷狮轨道交通装备有限公司 | Production process of grinding mill with ultralow porosity and high densification degree |
| CN109534731B (en) * | 2018-12-09 | 2022-08-30 | 马鞍山市雷狮轨道交通装备有限公司 | Deoiling grinds son for track traffic |
| CN111875923A (en) * | 2020-07-23 | 2020-11-03 | 中国铁道科学研究院集团有限公司金属及化学研究所 | Motor train unit grinding wheel without metal inserts and with good shape correction effect |
| CN113004867A (en) * | 2021-02-23 | 2021-06-22 | 山东金麒麟股份有限公司 | Environment-friendly friction material, high-speed rail brake pad and preparation method |
| CN113004867B (en) * | 2021-02-23 | 2022-03-04 | 山东金麒麟股份有限公司 | Environment-friendly friction material, high-speed rail brake pad and preparation method |
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Owner name: RAILWAY SCIENTIFIC RESEARCH ACADEMY METAL AND CHEM Effective date: 20150408 Owner name: BEIJING RAILWELD CO., LTD. Free format text: FORMER OWNER: RAILWAY SCIENTIFIC RESEARCH ACADEMY METAL AND CHEMICAL RESEARCH INSTITUTE Effective date: 20150408 |
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Effective date of registration: 20150408 Address after: 100081 Beijing city Haidian District Daliushu Road No. 2 Patentee after: Beijing China Academy of Railway Science New Material & Technology Co., Ltd. Patentee after: Railway Scientific Research Academy Metal And Chemical Research Institute Patentee after: China Academy of Railway Sciences Address before: 100081 Beijing city Haidian District Daliushu Road No. 2 Patentee before: Railway Scientific Research Academy Metal And Chemical Research Institute |