CN103496237A - Abrasion-resistant wagon steering frame stand column wearing plate and processing technology thereof - Google Patents
Abrasion-resistant wagon steering frame stand column wearing plate and processing technology thereof Download PDFInfo
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- CN103496237A CN103496237A CN201310497057.2A CN201310497057A CN103496237A CN 103496237 A CN103496237 A CN 103496237A CN 201310497057 A CN201310497057 A CN 201310497057A CN 103496237 A CN103496237 A CN 103496237A
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Abstract
The invention provides an abrasion-resistant wagon steering frame stand column wearing plate which is abrasion resistant, high in mechanical strength and reliable in connection, and a processing technology thereof. The abrasion-resistant wagon steering frame stand column wearing plate comprises an enhancement layer and a friction layer. The enhancement layer is composed of, by weight, 10-20 parts of nylon, 10-40 parts of carbon fibers, 10-50 parts of alkali-free glass fiber cloth and 20-40 parts of bismaleimide resin. The friction layer is composed of, by weight, 10-50 parts of aramid fibers, 10-50 parts of chopped glass fibers, 20-40 parts of bismaleimide resin, 10-50 parts of wollastonite powder and 10-50 parts of additives. The abrasion-resistant wagon steering frame stand column wearing plate is composed of the enhancement layer and the friction layer, compared with the prior art, has good abrasion-resistant performance and a stable friction coefficient (lower than 0.269), has high enough interfacial shearing force (larger than 2700N) and mechanical strength, guarantees safety running of wagons, and meanwhile has the advantages of being low in temperature rise and low in friction noise.
Description
Technical field
The present invention relates to a kind of new material, relate in particular to a kind of wear-resisting railway goods train bogie column wearing plate and processing technology thereof of wear-resisting high mechanical properties composite.
Technical background
The 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, thereby makes vibration obtain the even running that decay guarantees vehicle.Railway freight-car adopts the wedge of metal material and wearing plate to carry out damping by friction more at present, coefficient of friction is high, after column wearing plate and wedge generation heavy wear, coefficient of friction increases, the distortion of friction surface and the increase in gap, even because rhegma breaks away from, will destroy the vehicle damping performance, reduce vehicle smoothness, the 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 wear-resisting railway goods train bogie column wearing plate and processing technology thereof.
Technical scheme of the present invention is: comprise enhancement layer and frictional layer,
Described enhancement layer is comprised of the component of following weight portion: nylon 10-20 part, carbon fiber 10-40 part, alkali-free glass fiber cloth 10-50 part and bimaleimide resin 20-40 part;
Described frictional layer is comprised 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.
Described additive comprises graphite powder, molybdenum bisuphide and brass cotton.
The length of described carbon fiber is 2-11mm, and the length of described short glass fiber is 1-5mm, and the length of described aramid fiber is 1-5mm.
Be provided with magnetic in described enhancement layer or frictional layer.
Processing technology of the present invention comprises the following steps:
1), counterdie preformed:
A), alkali-free glass fiber cloth be impregnated in the bimaleimide resin that is mixed with nylon and carbon fiber and prepares 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 to dry mixed after, uniform spreading is on enhancement layer, as frictional layer;
C), utilize compression molding method to heat-treat: mold pressing is 200-220MPa, and gelling temp is 90-110 ℃, time 55-65 minute; Solidification temperature is 160-180 ℃, time 50-70 minute; Carry out rear solidify, treatment temperature is that 190-210 ℃, time are 30-50min again; Counterdie preformed completes;
2), lower mold forming:
A), the projection for the counter sink moulding at some uniform intervals is set in the bottom surface of patrix;
B), by upper and lower mould matched moulds, in projection embedding frictional layer;
C), upper and lower mould separates;
D), lower mold forming completes.
Be provided with electromagnet or permanent magnet in described projection.
The present invention is comprised of enhancement layer and frictional layer, compared with prior art, both there is good wearability and stable coefficient of friction (lower than 0.269), there is again sufficiently high shearing strength between layers (being greater than 2700N) mechanical strength, guaranteed the safe operation of railway freight-car, this wearing plate also has the characteristics 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, first, by mould assembling action (projection embeds in frictional layer), has rushed in advance the countersunk head groove, has protected the fibr tissue in frictional layer to form; Avoided in prior art, directly processed counter sink, reduced the damaged condition of destroying counter sink periphery frictional layer, the service life of having improved frictional layer;
Electromagnet or permanent magnet are set in projection, concentrate for the magnetic that will be free in enhancement layer or frictional layer, improved rigidity, the intensity at processing countersunk head position, be convenient to processing and the service life of having improved enhancement layer.
The 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, the 2nd, and counterdie, the 3rd, frictional layer, the 4th, enhancement layer, the 5th, projection, the 61st, electromagnet, the 62nd, permanent magnet, the 7th, countersunk head groove, the 8th, counter sink, the 9th, magnetic, the 10th, fibrage.
The specific embodiment
Embodiment mono-: after 20 parts, carbon fiber and 30 parts of mixing of bimaleimide resin that to get 20 parts of nylon, length be 6mm, 30 parts of alkali-free glass fiber cloths prepare prepreg, and the cutting moulding spreads in counterdie, as enhancement layer; 20 parts of aramid fibers (length is 2mm), 20 parts of short glass fibers (length is 2mm), 40 parts of bimaleimide resins, 5 parts of wollastonites in powder, 5 parts of graphite powders, 5 parts of molybdenum bisuphide, cotton 5 parts of brass, after dry mixed, uniform spreading is on enhancement layer; Utilize compression molding method to heat-treat: mold pressing is 200MPa, and gelling temp is 90 ℃, approximately 55 minutes time; Solidification temperature is 160 ℃, 50 minutes time; Carry out rear solidify, it is 30min that temperature is controlled at 190 ℃, time again; Counterdie preformed completes;
Then, the present invention as Figure 1-3, lower mold forming:
A), the projection for the counter sink moulding 5 at some uniform intervals is set in the bottom surface of patrix 1;
B), by upper and lower mould matched moulds, projection embeds in frictional layer 3, forms countersunk head groove 7, protect the fibrage 10 in frictional layer, avoided in prior art, directly processed counter sink, reduced the damaged condition of destroying counter sink periphery frictional layer, the service life of having improved frictional layer;
C), upper and lower mould separates;
D), counterdie 2 moulding complete.
Be provided with magnetic 9(in described enhancement layer 4 or frictional layer 3 as iron powder etc.), improved the Rigidity and strength of enhancement layer 4 or frictional layer 3.
Be provided with electromagnet 61 or permanent magnet 62 in described projection, concentrate for the magnetic that will be free in enhancement layer or frictional layer, improved rigidity, the intensity at processing countersunk head position, be convenient to processing and the service life of having improved enhancement layer.
Finally, process counter sink 8.
Embodiment bis-: after 20 parts, carbon fiber and 35 parts of mixing of bimaleimide resin that to get 15 parts of nylon, length be 6mm, 30 parts of alkali-free glass fiber cloths prepare prepreg, and the cutting moulding spreads in counterdie, as enhancement layer; 20 parts of aramid fibers (length is 2mm), 25 parts of short glass fibers (length is 2mm), 35 parts of bimaleimide resins, 5 parts of wollastonites in powder, 5 parts of graphite powders, 5 parts of molybdenum bisuphide, cotton 5 parts of brass, after dry mixed, uniform spreading is on enhancement layer; Utilize compression molding method to heat-treat: mold pressing is 210MPa, and gelling temp is 100 ℃, approximately 60 minutes time; Solidification temperature is 170 ℃, approximately 60 minutes time; Carry out rear solidify, it is 40min that temperature is controlled at 200 ℃, time again, and counterdie preformed completes;
Then, the present invention as Figure 1-3, lower mold forming:
A), the projection for the counter sink moulding 5 at some uniform intervals is set in the bottom surface of patrix 1;
B), by upper and lower mould matched moulds, projection embeds in frictional layer 3, forms countersunk head groove 7, protect the fibrage 10 in frictional layer, avoided in prior art, directly processed counter sink, reduced the damaged condition of destroying counter sink periphery frictional layer, the service life of having improved frictional layer;
C), upper and lower mould separates;
D), counterdie 2 moulding complete.
Be provided with magnetic 9(in described enhancement layer 4 or frictional layer 3 as iron powder etc.), improved the Rigidity and strength of enhancement layer 4 or frictional layer 3.
Be provided with electromagnet 61 or permanent magnet 62 in described projection, concentrate for the magnetic that will be free in enhancement layer or frictional layer, improved rigidity, the intensity at processing countersunk head position, be convenient to processing and the service life of having improved enhancement layer.
Finally, process counter sink 8.
Embodiment tri-: after 10 parts, carbon fiber and 40 parts of mixing of bimaleimide resin that to get 10 parts of nylon, length be 6mm, 40 parts of alkali-free glass fiber cloths prepare prepreg, and the cutting moulding spreads in counterdie, as enhancement layer; 20 parts of aramid fibers (length is 2mm), 15 parts of short glass fibers (length is 2mm), 45 parts of bimaleimide resins, 5 parts of wollastonites in powder, 5 parts of graphite powders, 5 parts of molybdenum bisuphide, cotton 5 parts of brass, after dry mixed, uniform spreading is on enhancement layer; Utilize compression molding method to heat-treat: mold pressing is 220MPa, and gelling temp is 110 ℃, 65 minutes time; Solidification temperature is 180 ℃, 70 minutes time; Carry out rear solidify, it is 50min that temperature is controlled at 210 ℃, time again, and counterdie preformed completes;
Then, the present invention as Figure 1-3, lower mold forming:
A), the projection for the counter sink moulding 5 at some uniform intervals is set in the bottom surface of patrix 1;
B), by upper and lower mould matched moulds, projection embeds in frictional layer 3, forms countersunk head groove 7, protect the fibrage 10 in frictional layer, avoided in prior art, directly processed counter sink, reduced the damaged condition of destroying counter sink periphery frictional layer, the service life of having improved frictional layer;
C), upper and lower mould separates;
D), counterdie 2 moulding complete.
Be provided with magnetic 9(in described enhancement layer 4 or frictional layer 3 as iron powder etc.), improved the Rigidity and strength of enhancement layer 4 or frictional layer 3.
Be provided with electromagnet 61 or permanent magnet 62 in described projection, concentrate for the magnetic that will be free in enhancement layer or frictional layer, improved rigidity, the intensity at processing countersunk head position, be convenient to processing and the service life of having improved enhancement layer.
Finally, process counter sink 8.
Technique effect of the present invention is:
One, enhancement layer is comprised of alkali-free glass fiber cloth 10-50 part, bimaleimide resin 20-40 part, carbon fiber 10-40 part and nylon 10-20 part.Wherein bimaleimide resin is the novel kind of heat stable resin, it is the resin that a class has the double activated end group, can crosslinking curing under heating or catalyst action, having good heat resistance, humidity, chemicals-resistant, anti-cosmic ray and excellent mechanical performance, is the matrix resin of the desirable advanced composite material of a class.Measure under the change curve of curing reaction curve, viscosity with temperature of bimaleimide resin and constant temperature viscosity curve over time by differential scanning calorimetric analysis and rotary viscosity method.When heating rate is 1.5 ℃/min, resin has a wider low viscosity platform from 90～170 ℃, and viscosity maintains in 11.25～59.25MPa.s scope.The advantages such as that carbon fiber has is high temperature resistant, corrosion-resistant, rub resistance and antifatigue, the service life of having improved wearing plate.
Prepreg is with resin matrix impregnating continuous fibres or fabric under the strict condition of controlling.Glass fabric being impregnated in the bimaleimide resin that is mixed with nylon and carbon fiber and prepares prepreg, shear and spread in mould the composition of making resin matrix and reinforcement, is the intermediate materials of 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 dipping process of galss fiber reinforced resin matrix composite, disperse the number of roller in the particle diameter of polymer powder, dipping tank and arrange, the introducing of the modified resin matrix of the pulling speed of temperature that polymer can reach in the heating drying tunnel, prepreg, grafting polar group etc. has direct impact to the system dipping effect; Resin content, porosity and the REGULATOR controlled in prepreg are that interface is in conjunction with also very important.
Two, frictional layer is comprised 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 is as one of Main Ingredients and Appearance of frictional layer, and its structure is more obvious to fiber surface and structure influence.The aramid short fiber surface is worn striation mark slightly, without obvious skin-core structure; Observing its worn striation mark under SEM is surperficial microfibre, with the fiber axially parallel, presents the gauffer shape, is that in forming process, the hurried variation 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 is also along with insulation and cold soaking steep condition and change to some extent.Can utilize fully different aramid fibers bonding, insulation and enhancing advantage separately.Hot pressing can significantly improve the mechanical performances such as the tensile strength, percentage elongation of aramid fiber.Condensed state structure aspect from high molecular polymer, aramid fiber is analyzed to how much between its large molecule to be arranged and comprises crystalline structure, amorphous state, alignment state and knit the structure such as state, and the main structure parameters such as fiber molecule amount, degree of crystallinity, cohesion energy density (cohesive energy density is called for short CED).Adopt hot analysis means, the impact on its structure such as temperature, thermal stress when the research fiber is heated, aramid fiber mean molecule quantity size is 100,000 left and right.CED is higher, illustrates to take hydrogen bond as main macroscopical secondary bond active force is larger between strand, is conducive to fiber and maintains stable condensed state structure, good melt flow property, unique viscosity behavior, easy conjunctiva etc.
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 guarantee safety operating.
Claims (6)
1. a wear-resisting railway goods train bogie column wearing plate, is characterized in that, comprises enhancement layer and frictional layer,
Described enhancement layer is comprised of the component of following weight portion: nylon 10-20 part, carbon fiber 10-40 part, alkali-free glass fiber cloth 10-50 part and bimaleimide resin 20-40 part;
Described frictional layer is comprised 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.
2. a kind of wear-resisting railway goods train bogie column wearing plate according to claim 1, is characterized in that, described additive comprises graphite powder, molybdenum bisuphide and brass cotton.
3. a kind of wear-resisting railway goods train bogie column wearing plate according to claim 1 and 2, is characterized in that, the length of described carbon fiber is 2-11mm, and the length of described short glass fiber is 1-5mm, and the length of described aramid fiber is 1-5mm.
4. a kind of wear-resisting railway goods train bogie column wearing plate according to claim 1 and 2, is characterized in that, in described enhancement layer or frictional layer, is provided with magnetic.
5. the processing technology of a wear-resisting railway goods train bogie column wearing plate claimed in claim 1, is characterized in that, comprises the following steps:
1), counterdie preformed:
A), alkali-free glass fiber cloth be impregnated in the bimaleimide resin that is mixed with nylon and carbon fiber and prepares 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 to dry mixed after, uniform spreading is on enhancement layer, as frictional layer;
C), utilize compression molding method to heat-treat: mold pressing is 200-220MPa, and gelling temp is 90-110 ℃, time 55-65 minute; Solidification temperature is 160-180 ℃, time 50-70 minute; Carry out rear solidify, treatment temperature is that 190-210 ℃, time are 30-50min again; Counterdie preformed completes;
2), lower mold forming:
A), the projection for the counter sink moulding at some uniform intervals is set in the bottom surface of patrix;
B), by upper and lower mould matched moulds, in projection embedding frictional layer;
C), upper and lower mould separates;
D), lower mold forming completes.
6. the processing technology of a kind of wear-resisting railway goods train bogie column wearing plate of stating according to claim 5, 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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| CN201310497057.2A CN103496237B (en) | 2013-10-22 | 2013-10-22 | Abrasion-resistant wagon steering frame stand column wearing plate and processing technology thereof |
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| CN201310497057.2A CN103496237B (en) | 2013-10-22 | 2013-10-22 | Abrasion-resistant wagon steering frame stand column wearing plate and processing technology thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104210506A (en) * | 2014-08-01 | 2014-12-17 | 河北辛集腾跃实业有限公司 | Polymer composite tapered wedge main friction plate and production method thereof |
| CN108273964A (en) * | 2016-03-14 | 2018-07-13 | 扬州华铁铁路配件有限公司 | A kind of production method for the cylinder jacket improving surface quality |
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| 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 CN201310497057.2A patent/CN103496237B/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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104210506A (en) * | 2014-08-01 | 2014-12-17 | 河北辛集腾跃实业有限公司 | Polymer composite tapered wedge main friction plate and production method thereof |
| CN108273964A (en) * | 2016-03-14 | 2018-07-13 | 扬州华铁铁路配件有限公司 | A kind of production method for the cylinder jacket improving surface quality |
| CN108273964B (en) * | 2016-03-14 | 2019-07-26 | 扬州华铁铁路配件有限公司 | A kind of production method for the cylinder jacket improving surface quality |
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