RU2501690C2 - Production of car bogie centre plate antifriction inserts - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: centre plate steel core is treated by phosphating composition before coat application. Contact moulding is used to apply epoxy paste layer composed of two components. First component consists of epoxy resin, active epoxy diluent, nontoxic aliphatic or aromatic hydroxyl acids whereto added are the mix of antifriction powder and fibrous fillers. Second component consists of nontoxic addition compound obtained in interaction aliphatic di- or polyamine with epoxy diane resin and nontoxic di- and or polyatomic alcohol. Both components, that is, resin part and hardening part, are prepared equal in volume and weight immediately before application and applied on centre plate steel core and hardened.

EFFECT: high-strength antifriction coat of centre plate.

2 tbl

Description

The invention relates to railway transport, in particular to the support of the wagon body on a trolley, and can be used in various industries of engineering, construction and other industries.

The closest prototype of the proposed solution is a method of manufacturing metal-polymer inserts disclosed in RU 2240940 C2, on the surfaces of which, interacting with a firing pin and a pin, an anti-friction high-strength polymer coating is made of cast polyurethane SKU-PFA-100 or its analogue, reinforced with fiberglass, cord or Kevlar and polymerized at 140 ° C.

The disadvantages of the prototype are the complex technology and the high complexity of applying a polymer coating using expensive equipment and accessories, the use of high polymerization temperatures (140 ° C), relatively low elastic strength properties and low adhesion to the polymer coating metal, which do not ensure their operational reliability.

The aim of the invention is to significantly simplify the manufacturing technology of inserts with a composite coating, as well as increasing the elastic strength and adhesion to the metal of the antifriction composite coating.

This goal is achieved by the fact that before applying the coating, the surfaces are treated with a phosphating compound, after which a paste-like composite epoxy compound is prepared by contact molding, prepared under industrial conditions and supplied in the form of two components - the first is the resin part consisting of epoxy resin (A), active epoxy diluent (B), non-toxic aliphatic or aromatic hydroxy acid (C) in a ratio of A: B: C from 96: 3.9: 0.1 to 50:40:10, into which a mixture of antifriction powder (G) and fibrous fillers (D) in the ratio G: D from 98: 2 to 60:40 in the amount of (A + B + C) :( G + D) from 80:20 to 20:80, and the second the curing part, consisting of a non-toxic adduct obtained by reacting an aliphatic or aromatic di- or polyamine with an epoxy diane resin with a molecular weight of from 400 to 2500 with an 8-20-fold molar excess of amine and non-toxic and non-volatile di- or polyhydric alcohol in the ratio of adduct: alcohol from 98: 2 to 60:40 and a mixture of the same fillers G and D in the ratio (adduct + alcohol) :( G + D) from 80:20 to 20:80, while and the component - the resin part and the curing one - is made by adjusting the ratio of incoming ingredients to equal in volume and weight with an accuracy of 5%, which are mixed immediately before use and applied after mixing manually or on plasticizing equipment, leaving to be cured after application at a temperature of -10 ° C to + 55 ° C for 2 to 24 hours or when heated to 70-100 ° C for 7 to 8 minutes.

Example 1

Obtaining a composite material is not described anywhere and was first developed by the authors as an integral part of the claimed invention.

Getting the resin part.

73 parts by weight are charged into a reactor equipped with heating and a high-speed stirrer. epoxy Dianova resin brand ED-20 (A), 22 wt. including the active diluent - diglycidin ether triethylene glycol brand TEG-1 (B) and 5 wt. including harmless lactic acid (B). The mixture is stirred at a temperature of 70 ° C for 10 minutes at a stirrer speed of 500 rpm. The resulting mixture is cooled to the temperature of the production room (+ 20 ° C) and loaded into a paddle Z-shaped mixer. Then, graphite powder (G) and chopped high-modulus polyamide fiber of the SVS (D) brand are added to the same mixer in the ratio G: D = 80: 20 s and the ratio (A + B + C) :( G + D) = 50: 50 . After stirring for 30 minutes at 20 ° C, the resulting paste-like resin part is packaged and packaged in the form of flat rectangular samples weighing 250 g and then complete with a curing part.

Obtaining a curing part.

In another reactor, a melt of metaphenylenediamine heated to 70 ° C. is charged in an amount of 90 parts by weight, and then gradually added to it over 10 minutes, 100 parts by weight. a melt of epoxy diane resin brand ED-8 with a molecular weight of 1100, ie with a 14-fold molar excess of metaphenylenediamine relative to the resin. After stirring for 20 minutes at 70 ° C, an adduct forms. To the adduct in the amount of 190 parts by weight add 38 parts by weight non-toxic 3-atomic alcohol - glycerol (adduct: glycerin ratio = 80: 20). The resulting mixture is cooled to + 20 ° C and sent to a Z-shaped paddle mixer for mixing with the same fillers (G + D) that is introduced into the resin portion at a ratio of (adduct + glycerin): (G + D) = 50: 50 .

After stirring at + 20 ° C for 30 minutes, the resulting curing part is packaged in 250 g and packaged in the form of flat rectangular samples in a plastic film, followed by a complete set with a resin part.

Coating

The metal surface of the plate is pretreated with a phosphating rust modifier based on phosphoric acid grade SF1 (PTU 212-002-18817747-2001), then sets consisting of 2 parts, equal in weight and volume, are resin and curing, having an allowable shelf life of at least 6 months delivered to the consumer at any distance.

Before using the kit, the packaging film is removed from both components, and then both components are mixed by kneading together manually or using plasticizing equipment, rollers or screw machines for 5 minutes.

The mixed mass remains viable for 60 minutes.

The resulting pasty mass is applied to the metal surface of the plate with a syringe or manually. Due to the exoteric reaction, at the beginning of curing, the mass warms up and acquires good flowability. Curing at 20 ° C occurs without the release of volatile and with slight shrinkage - not more than 0.05% within 3 hours. Heating with hot air to 80 ° C reduces the curing time to 3 minutes.

Examples 2-7 are carried out analogously to example 1 with a change in the parameters and the compounds used in accordance with table 1.

Properties of antifriction materials obtained by the claimed method are shown in table 2.

Table 1 The conditions for the implementation of the proposed method according to examples 2-7 Name of incoming ingredient or parameter The value of the example and prototype 2 3 four 5 6 7 Obtaining the resin portion (first component) one Type of epoxy resin (A) diglycidyl phthalate (DHF brand) tetra-glycidyl derivative 3,3'-dichloro-4,4'-diaminodiphenyl methane (grade ECD) epoxidized phenol-formaldehyde novolak (UP-643 brand) Triglycidyliso-cyanurate (EC grade) 4,4'-dioxiphenylsulfon diglycidyl ether (grade FOU-12) 2 Type of active epoxy diluent (B) polypichlorohydrin diglycidyl ether (grade E-181) Etriol triglycidyl ether (grade EET-1) diethylene glycol diglycidyl ether (brand DEG-1) epoxidized polypropylene glycol (Laproxid brand 703) 3 Type of acid (B) lemon wine para-hydroxybenzoic dairy ortho-oxybenzoic (salicylic) four A: B: C ratio 73: 22: 5 73: 22: 5 73: 22: 5 73: 22: 5 96: 3.9: 0.1 50:40:10 5 Mixing parameters A + B + C temperature, ° С 80 fifty fifty fifty 70 80 time min 10 thirty twenty twenty twenty 80 mixer speed, revolutions / min 500 1000 1000 one hundred 500 1500 6 Type of powder filler (G) molybdenum sulfide tetrafluoro ethylene powder talc bronze powder graphite and molybdenum disulfide powder concentrate

7 Type of fibrous filler and chopped fiber length (D) carbon fiber, length 10 mm high modular polyamide fiber brand SVM, length 20 mm fluoron fiber, length 70 mm nylon fiber, length 5 mm fiber "Arselon", length 10 mm 8 Ratio G: D 80:20 80:20 80:20 80:20 98: 2 60:40 9 The ratio (A + B + C) :( D: D) 50:50 50:50 50:50 50:50 80:20 20:80 10 The weight of the first component, parts by weight one hundred 400 one hundred one hundred one hundred one hundred Obtaining a curing part / second component one Type of amine to produce adduct 4,4'diaminodiphenylmethane polyamine polyamine (PEPA) Metaphenylene diamine para-aminobenzyl aniline diethylene triamine triethylenetetraamine 2 Grade and molecular weight (M.M.) of epoxy Dianova resin to obtain the adduct resin ED-16 resin ED-20 resin E-49 resin ED-20 resin E-45 resin ED-8 M.M 500 M.M 400 M.M 2500 M.M 400 M.M 1500 M.M 1100 3 The multiplicity of the molar excess of amine upon receipt of the adduct 12 12 12 12 8 twenty four The mode of adduct and mixing with alcohol temperature, ° С 80 80 80 80 60 40

time, min + mixing time with alcohol, min 20 + 10 20 + 10 20 + 10 20 + 10 30 + 10 100 + 10 mixer speed, revolutions / min 500 1000 1000 1000 1500 1500 5 Type and di- or polyhydric alcohol triethylene glycol etrial glycerol pentaerythritol arabinose glycerol 6 The ratio of powder and fiber fillers G: D 80:20 80:20 80:20 80:20 98: 2 60:40 7 The ratio (adduct + alcohol) :( G + D) 50:50 50:50 50:50 50:50 80:20 20:80 8 Adduct Alcohol Mixing Mode with Fillers temperature, ° С twenty twenty twenty twenty fifteen thirty time min thirty thirty thirty thirty twenty 40 9 The weight of the second component, parts by weight one hundred 400 one hundred one hundred one hundred one hundred Coating one Phosphate view
total composition iron phosphate composition of the KFA-8 brand zinc phosphate composition, concentrate KFA-8 zinc-barium phosphate based on a mixture of phosphate and nitric acids 2 Mixing time of resin and curing parts, min 5 3 10 5 5 5 3 Coating cure mode temperature, ° С twenty twenty +55 -10 95 70 time 10 hours 10 hours 1 hour 24 hours 1 minute 6 minutes

table 2 The properties of the coatings applied to the insert according to examples 1-7 in comparison with the prototype. Name of indicator The value of the example and prototype one 2 3 four 5 6 7 Prototype one Storage stability in storage conditions not less than 6 months 2 Minimum permissible curing temperature, ° С -10 +5 0 +10 +5 +5 +55 140 3 Curing time at minimum temperature, h 24 6 10 2 2 2 one four four Curing time at 80 ° C and a thickness of 2 mm, min 0.5 one 0.5 one one one one not cured 5 The specific pressure during molding, MPa 0.1 0.1 0.1 0.1 0.1 0.002 0.21 twenty 6 Tensile Strength, MPa 190 210 280 250 250 190 250 1120 7 Tensile modulus, MPa 6000 5500 7000 6100 6200 6000 6300 2500 8 Strength at separation of coating from steel, MPa 60 55 62 66 54 58 62 16 9 Friction coefficient (v = 15 m / s P = 4 MPa) 0.11 0.12 0.13 0.11 0.12 0.11 0.12 0.11-0.14

Claims (1)

A method of manufacturing anti-friction inserts of the carriage car’s thrust bearing, including the process of applying an anti-friction coating to a steel plate in the form of a plate having holes to form a continuous working surface of the plate, characterized in that the surfaces are treated with a phosphating compound before coating, after which a paste-like composite is applied by contact molding an epoxy compound prepared under production conditions and supplied in the form of two components - the first - smo any part consisting of epoxy resin (A), active epoxy diluent (B), non-toxic aliphatic or aromatic hydroxy acid (C) in the ratio A: B: C from 96: 3,9: 0,1 to 50:40:10, into which a mixture of antifriction powder (G) and fibrous (D) fillers is introduced in a ratio of G: D from 98: 2 to 60:40 in an amount of (A + B + C) :( G + D) from 80:20 to 20: 80, and the second curing part, consisting of a non-toxic adduct obtained by reacting an aliphatic or aromatic di or polyamine with an epoxy diane resin with a molecular weight of from 400 to 2500 With an 8-20-fold molar excess of amine and non-toxic and non-volatile di- or polyhydric alcohol with an adduct: alcohol ratio of 98: 2 to 60:40 and a mixture of the same fillers G and D in the ratio (adduct + alcohol) :( G + E) from 80:20 to 20:80, while both components - the resin part and the curing one - are made by adjusting the ratio of incoming ingredients to equal in volume and weight with an accuracy of 5%, which are mixed immediately before use and applied after mixing manually or on plasticizing equipment, leaving after curing sya at a temperature from -10 ° C to + 55 ° C for 2 to 24 hours or by heating to 70-100 ° C of from 7 to 8 minutes.