CN103522681B - Railway freight car bogie upright column wear plate and processing process thereof - Google Patents
Railway freight car bogie upright column wear plate and processing process thereof Download PDFInfo
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- CN103522681B CN103522681B CN201310497058.7A CN201310497058A CN103522681B CN 103522681 B CN103522681 B CN 103522681B CN 201310497058 A CN201310497058 A CN 201310497058A CN 103522681 B CN103522681 B CN 103522681B
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Abstract
The invention discloses a railway freight car bogie upright column wear plate and a processing process thereof. The railway freight car bogie upright column wear plate, provided by the invention, has the advantages of wear resistance, strong mechanical strength and reliable connection. The railway freight car bogie upright column wear plate comprises an enhancement layer and a friction layer, wherein the enhancement layer consists of the following components in parts by weight: 10-50 parts of alkali-free glass fiber fabric, 20-40 parts of bismaleimide resin and 10-50 parts of chopped glass fiber; and the friction layer is prepared from the following components in parts by weight: 10-50 parts of aramid fiber, 10-50 parts of chopped glass fiber, 20-40 parts of bismaleimide resin, 10-50 parts of wollastonite powder and 10-50 parts of additive. Compared with the prior art, the railway freight car bogie upright column wear plate provided by the invention comprises the enhancement layer and the friction layer, has excellent wear resistance and stable friction coefficient (less than 0.27) and also has enough strong interfacial shear strength (more than 2700 N) and mechanical strength, so that the safe running of a railway freight car is ensured, and meanwhile the railway freight car bogie upright column wear plate also has the characteristics of low temperature rise and small friction noise.
Description
Technical field
The present invention relates to a kind of new material, particularly relate to a kind of railway freight car bogie upright column wear plate and processing technology thereof of wear-resisting high mechanical properties glass fiber compound material.
Technical background
Railway freight-car friction damper mainly relies on the frictional resistance between side frame column wearing plate and wedge to suppress, absorb vertical vibration, makes vibration and impact energy be converted into heat energy, thus makes vibration obtain the even running of decay guarantee vehicle.Wedge and the wearing plate of current railway freight-car many employings metal material carry out damping by friction, coefficient of friction is high, when after column wearing plate and wedge generation heavy wear, coefficient of friction increases, the distortion of friction surface and the increase in gap, even depart from because of rhegma, will destroy vehicle damping performance, reduce vehicle smoothness, serious threat traffic safety.
Summary of the invention
The present invention is directed to above problem, provide a kind of wear-resisting, mechanical strength is high, connects reliable railway freight car bogie upright column wear plate and processing technology thereof.
Technical scheme of the present invention is: comprise enhancement layer and frictional layer,
Described enhancement layer is made up of the component of following weight portion: alkali-free glass fiber cloth 10-50 part, bimaleimide resin 20-40 part and short glass fiber 10-50 part;
Described frictional layer is made up of the component of following weight portion: aramid fiber 10-50 part, short glass fiber 10-50 part, bimaleimide resin 20-40 part, wollastonite in powder 10-50 part and additive 10-50 part.
It is cotton that described additive comprises graphite powder, molybdenum bisuphide and brass.
The length of described short glass fiber is 1-5mm, and the length of described aramid fiber is 1-5mm.
Magnetic is provided with in described enhancement layer.
Processing technology of the present invention comprises the following steps:
1), counterdie preformed:
A), by alkali-free glass fiber cloth impregnated in the bimaleimide resin being mixed with short glass fiber and prepare prepreg, shear and spread in counterdie as enhancement layer;
B), aramid fiber, short glass fiber, bimaleimide resin, wollastonite in powder and additive are carried out dry mixed after, uniform spreading on enhancement layer, as frictional layer;
C), utilize compression molding method to heat-treat: mold pressing is 200-220MPa, gelling temp is 90-110 DEG C, time 55-65 minute; Solidification temperature is 160-180 DEG C, time 50-70 minute; Carry out Post RDBMS again, treatment temperature is 190-210 DEG C, the time is 30-50min; Counterdie preformed completes;
2), lower mold forming:
A), the projection shaping for counter sink at some uniform intervals be set in the bottom surface of patrix;
B), by upper and lower mould matched moulds, in protruding embedding frictional layer;
C), upper and lower mould is separated;
D), lower mold forming completes.
Electromagnet or permanent magnet is provided with in described projection.
The present invention is made up of enhancement layer and frictional layer, compared with prior art, both there is excellent wearability and stable coefficient of friction (lower than 0.27), there is again sufficiently high shearing strength between layers (being greater than 2700N) mechanical strength, ensure that the safe operation of railway freight-car, this wearing plate also has the feature that temperature rise is low, friction noise is little simultaneously.
The present invention, when production and processing, arranges projection in the bottom surface of patrix, and first by mould assembling action (in protruding embedding frictional layer), rushed countersunk head groove in advance, the fibr tissue protected in frictional layer is formed; Avoid in prior art, directly carry out processing counter sink, reduce the damaged condition destroying counter sink periphery frictional layer, improve the service life of frictional layer;
Electromagnet or permanent magnet are set in projection, for being concentrated by the magnetic be free in enhancement layer, improve rigidity, the intensity at processing countersunk head position, being convenient to processing, and improve the service life of enhancement layer.
Accompanying drawing explanation
Fig. 1 is forming process figure mono-of the present invention,
Fig. 2 is forming process figure bis-of the present invention,
Fig. 3 is forming process figure tri-of the present invention;
In figure, 1 is patrix, and 2 is counterdies, and 3 is frictional layers, and 4 is enhancement layers, and 5 is protruding, and 61 is electromagnet, and 62 is permanent magnets, and 7 is countersunk head grooves, and 8 is counter sinks, and 9 is magnetics, and 10 is fibrages.
Detailed description of the invention
Embodiment one: after getting short glass fiber 20 parts that length is 2mm, bimaleimide resin 40 parts mixing, alkali-free glass fiber cloth 40 parts prepares prepreg, and cutting is shaping to be spread in counterdie, as enhancement layer; Cotton 5 parts of aramid fiber (length is 2mm) 20 parts, short glass fiber (length is 2mm) 20 parts, bimaleimide resin 40 parts, wollastonite in powder 5 parts, graphite powder 5 parts, molybdenum bisuphide 5 parts, brass, after dry mixed, uniform spreading is on enhancement layer; Utilize compression molding method to heat-treat: mold pressing is 200MPa, gelling temp is 90 DEG C, about 55 minutes time; Solidification temperature is 160 DEG C, 50 minutes time; Carry out Post RDBMS again, temperature control 190 DEG C, the time is 30min; Counterdie preformed completes;
Then, the present invention as Figure 1-3, lower mold forming:
A), the projection 5 shaping for counter sink at some uniform intervals be set in the bottom surface of patrix 1;
B), by upper and lower mould matched moulds, in protruding embedding frictional layer 3, countersunk head groove 7 is formed, protect the fibrage 10 in frictional layer, avoid in prior art, directly carry out processing counter sink, reduce the damaged condition destroying counter sink periphery frictional layer, improve the service life of frictional layer;
C), upper and lower mould is separated;
D), counterdie 2 is shaping completes.
Magnetic 9(is provided with as iron powder etc. in described enhancement layer 4), improve the Rigidity and strength of enhancement layer 4.
Be provided with electromagnet 61 or permanent magnet 62 in described projection, for being concentrated by the magnetic be free in enhancement layer, improve rigidity, the intensity at processing countersunk head position, being convenient to processing, and improve the service life of enhancement layer.
Finally, counter sink 8 is processed.
Embodiment two: after getting short glass fiber 25 parts that length is 2mm, bimaleimide resin 35 parts mixing, alkali-free glass fiber cloth 40 parts prepares prepreg, and cutting is shaping to be spread in counterdie, as enhancement layer; Cotton 5 parts of aramid fiber (length is 2mm) 20 parts, short glass fiber (length is 2mm) 25 parts, bimaleimide resin 35 parts, wollastonite in powder 5 parts, graphite powder 5 parts, molybdenum bisuphide 5 parts, brass, after dry mixed, uniform spreading is on enhancement layer; Utilize compression molding method to heat-treat: mold pressing is 210MPa, gelling temp is 100 DEG C, about 60 minutes time; Solidification temperature is 170 DEG C, about 60 minutes time; Carry out Post RDBMS again, temperature control 200 DEG C, the time is 40min, counterdie preformed completes;
Then, the present invention as Figure 1-3, lower mold forming:
A), the projection 5 shaping for counter sink at some uniform intervals be set in the bottom surface of patrix 1;
B), by upper and lower mould matched moulds, in protruding embedding frictional layer 3, countersunk head groove 7 is formed, protect the fibrage 10 in frictional layer, avoid in prior art, directly carry out processing counter sink, reduce the damaged condition destroying counter sink periphery frictional layer, improve the service life of frictional layer;
C), upper and lower mould is separated;
D), counterdie 2 is shaping completes.
Magnetic 9(is provided with as iron powder etc. in described enhancement layer 4), improve the Rigidity and strength of enhancement layer 4.
Be provided with electromagnet 61 or permanent magnet 62 in described projection, for being concentrated by the magnetic be free in enhancement layer, improve rigidity, the intensity at processing countersunk head position, being convenient to processing, and improve the service life of enhancement layer.
Finally, counter sink 8 is processed.
Embodiment three: after getting short glass fiber 15 parts that length is 2mm, bimaleimide resin 45 parts mixing, alkali-free glass fiber cloth 40 parts prepares prepreg, and cutting is shaping to be spread in counterdie, as enhancement layer; Cotton 5 parts of aramid fiber (length is 2mm) 20 parts, short glass fiber (length is 2mm) 15 parts, bimaleimide resin 45 parts, wollastonite in powder 5 parts, graphite powder 5 parts, molybdenum bisuphide 5 parts, brass, after dry mixed, uniform spreading is on enhancement layer; Utilize compression molding method to heat-treat: mold pressing is 220MPa, gelling temp is 110 DEG C, 65 minutes time; Solidification temperature is 180 DEG C, 70 minutes time; Carry out Post RDBMS again, temperature control 210 DEG C, the time is 50min, counterdie preformed completes;
Then, the present invention as Figure 1-3, lower mold forming:
A), the projection 5 shaping for counter sink at some uniform intervals be set in the bottom surface of patrix 1;
B), by upper and lower mould matched moulds, in protruding embedding frictional layer 3, countersunk head groove 7 is formed, protect the fibrage 10 in frictional layer, avoid in prior art, directly carry out processing counter sink, reduce the damaged condition destroying counter sink periphery frictional layer, improve the service life of frictional layer;
C), upper and lower mould is separated;
D), counterdie 2 is shaping completes.
Magnetic 9(is provided with as iron powder etc. in described enhancement layer 4), improve the Rigidity and strength of enhancement layer 4.
Be provided with electromagnet 61 or permanent magnet 62 in described projection, for being concentrated by the magnetic be free in enhancement layer, improve rigidity, the intensity at processing countersunk head position, being convenient to processing, and improve the service life of enhancement layer.
Finally, counter sink 8 is processed.
Technique effect of the present invention is:
One, enhancement layer is made up of alkali-free glass fiber cloth 10-50 part, bimaleimide resin 20-40 part and short glass fiber (length is 1-5mm) 10-50 part.Wherein bimaleimide resin is the novel kind of heat stable resin, it is the resin that a class has double activated end group, can crosslinking curing under heating or catalyst action, having the mechanical performance of good heat resistance, humidity, chemicals-resistant, resistance to cosmic ray and excellence, is the matrix resin of the desirable advanced composite material of a class.By viscosity curve over time under differential scanning calorimetric analysis and rotary viscosity method mensuration the curing reaction curve of bimaleimide resin, the change curve of viscosity with temperature and constant temperature.When heating rate is 1.5 DEG C/min, resin has a wider low viscosity platform from 90 ~ 170 DEG C, and viscosity maintains within the scope of 11.25 ~ 59.25MPa.s.
Prepreg is with resin matrix impregnating continuous fibres or fabric under the strict condition controlled.Being impregnated in the bimaleimide resin being mixed with short glass fiber by glass fabric and prepare prepreg, shear and sprawl the composition making resin matrix and reinforcement in a mold, is the intermediate materials manufacturing composite; Its properties is directly brought in composite, is the basis of composite.The performance of composite depends on the performance of prepreg to a great extent.In the powder infusion process of galss fiber reinforced resin matrix composite, the introducing etc. of the number of dispersion roller and arrangement in the particle diameter of polymer powder, dipping tank, temperature that polymer can reach in heating drying tunnel, the pulling speed of prepreg, the modified resin matrix of grafted polar group has direct impact to system dipping effect; The resin content, porosity and the REGULATOR system interface cohesion that control in prepreg are also very important.
Two, frictional layer is made up of aramid fiber (length is 1-5mm) 10-50 part, short glass fiber (length is 1-5mm) 10-50 part, bimaleimide resin 20-40 part, wollastonite in powder 10-50 part, additive 10-50 part.Wherein additive is graphite powder, molybdenum bisuphide, brass cotton.
Aramid fiber as one of the Main Ingredients and Appearance of frictional layer, its structure to fiber surface and structure influence more obvious.Aramid short fiber surface slightly worn striation mark, without obvious skin-core structure; Observing the microfibre that its worn striation mark is surface under SEM, with fiber axis to parallel, present corrugated, is that in forming process, the hurried change of condensed state forms the morphological feature of supramolecular structure at fiber surface.Carry out insulation or the cold treatment of certain hour after aramid fiber hot pressing, the tensile index of aramid fiber hot pressing is improved; Tear index also changes to some extent along with insulation and cold immersion condition.Can utilize fully different aramid fiber separately bonding, insulation and enhancing advantage.Hot pressing can significantly improve the mechanical performance such as tensile strength, percentage elongation of aramid fiber.From the condensed state structure aspect of high molecular polymer, the geometry arrangement that aramid fiber is analyzed between its large molecule is comprised to crystalline structure, amorphous state, alignment state and knits the structures such as state, and the main structure parameters such as fiber molecule amount, degree of crystallinity, cohesion energy density (cohesive energy density, be called for short CED).Adopt thermal analysis method, when research fiber is heated, temperature, thermal stress etc. are on the impact of its structure, and aramid fiber mean molecule quantity size is about 100,000.CED is higher, illustrates that the macroscopical secondary bond active force based on hydrogen bond between strand is larger, is conducive to condensed state structure, good melt flow property, unique viscosity behavior, easy conjunctiva etc. that fiber remains stable.
Physical and mechanical property of the present invention, as shown in the table:
The results showed that this wearing plate has stable coefficient of friction and good wearability, there is sufficiently high mechanical property simultaneously and ensure safety operating.
Claims (5)
1. a railway freight car bogie upright column wear plate, is characterized in that, comprises enhancement layer and frictional layer,
Described enhancement layer is made up of the component of following weight portion: alkali-free glass fiber cloth 10-50 part, bimaleimide resin 20-40 part and short glass fiber 10-50 part;
Described frictional layer is made up of the component of following weight portion: aramid fiber 10-50 part, short glass fiber 10-50 part, bimaleimide resin 20-40 part, wollastonite in powder 10-50 part and additive 10-50 part; Magnetic is provided with in described enhancement layer.
2. a kind of railway freight car bogie upright column wear plate according to claim 1, is characterized in that, it is cotton that described additive comprises graphite powder, molybdenum bisuphide and brass.
3. a kind of railway freight car bogie upright column wear plate according to claim 1 and 2, is characterized in that, the length of described short glass fiber is 1-5mm, and the length of described aramid fiber is 1-5mm.
4. a processing technology for railway freight car bogie upright column wear plate according to claim 1, is characterized in that, comprises the following steps:
1), counterdie preformed:
A), by alkali-free glass fiber cloth impregnated in the bimaleimide resin being mixed with short glass fiber and prepare prepreg, shear and spread in counterdie as enhancement layer;
B), aramid fiber, short glass fiber, bimaleimide resin, wollastonite in powder and additive are carried out dry mixed after, uniform spreading on enhancement layer, as frictional layer;
C), utilize compression molding method to heat-treat: mold pressing is 200-220MPa, gelling temp is 90-110 DEG C, time 55-65 minute; Solidification temperature is 160-180 DEG C, time 50-70 minute; Carry out Post RDBMS again, treatment temperature is 190-210 DEG C, the time is 30-50min; Counterdie preformed completes;
2), lower mold forming:
A), the projection shaping for counter sink at some uniform intervals be set in the bottom surface of patrix;
B), by upper and lower mould matched moulds, in protruding embedding frictional layer;
C), upper and lower mould is separated;
D), lower mold forming completes.
5. the processing technology of a kind of railway freight car bogie upright column wear plate according to claim 4, is characterized in that, is provided with electromagnet or permanent magnet in described projection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310497058.7A CN103522681B (en) | 2013-10-22 | 2013-10-22 | Railway freight car bogie upright column wear plate and processing process thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310497058.7A CN103522681B (en) | 2013-10-22 | 2013-10-22 | Railway freight car bogie upright column wear plate and processing process thereof |
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| CN103522681A CN103522681A (en) | 2014-01-22 |
| CN103522681B true CN103522681B (en) | 2015-07-15 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60129438A (en) * | 1983-12-15 | 1985-07-10 | Akebono Brake Ind Co Ltd | Friction member for shaft box guide element |
| CN1749309A (en) * | 2005-10-25 | 2006-03-22 | 济南铁路局工程机械厂 | Abrasion plate of carbon fiber composite material for railway freight train bogie vertical shaft |
| CN101293968A (en) * | 2008-06-13 | 2008-10-29 | 镇江铁科橡塑制品有限公司 | Polymer composite material for main friction plate of goods train cam driver |
| CN201235826Y (en) * | 2008-06-13 | 2009-05-13 | 镇江铁科橡塑制品有限公司 | Main friction plate for cam driver of goods train |
| CN102050128A (en) * | 2010-12-28 | 2011-05-11 | 河北辛集腾跃实业有限公司 | Polymer composite side bearing wear plate |
| CN102924741A (en) * | 2012-10-24 | 2013-02-13 | 中国航空工业集团公司北京航空材料研究院 | Method for enhancing surface abrasion resistance of liquid molding composite material |
-
2013
- 2013-10-22 CN CN201310497058.7A patent/CN103522681B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60129438A (en) * | 1983-12-15 | 1985-07-10 | Akebono Brake Ind Co Ltd | Friction member for shaft box guide element |
| CN1749309A (en) * | 2005-10-25 | 2006-03-22 | 济南铁路局工程机械厂 | Abrasion plate of carbon fiber composite material for railway freight train bogie vertical shaft |
| CN101293968A (en) * | 2008-06-13 | 2008-10-29 | 镇江铁科橡塑制品有限公司 | Polymer composite material for main friction plate of goods train cam driver |
| CN201235826Y (en) * | 2008-06-13 | 2009-05-13 | 镇江铁科橡塑制品有限公司 | Main friction plate for cam driver of goods train |
| CN102050128A (en) * | 2010-12-28 | 2011-05-11 | 河北辛集腾跃实业有限公司 | Polymer composite side bearing wear plate |
| CN102924741A (en) * | 2012-10-24 | 2013-02-13 | 中国航空工业集团公司北京航空材料研究院 | Method for enhancing surface abrasion resistance of liquid molding composite material |
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Granted publication date: 20150715 Termination date: 20161022 |